HomeMy WebLinkAboutFinal Wheat Ridge VCP ApplicationFebruary 5, 2019
Colorado Department of Public Health and Environment
WQCD-RP-B2
4300 Cherry Creek Drive South
Denver, Colorado 80246-1530
Attn: Mr. Fonda Apostolopoulos
Re:Voluntary Cleanup Program Tax Credit Notification
City of Wheat Ridge Brownfields Remediation
7690 West 38th Avenue
Wheat Ridge,Jefferson County, Colorado
Dear Mr. Apostolopoulos:
The City of Wheat Ridge Brownfields Remediation site has re-submitted an application to enter
the Colorado Department of Public Health and Environment’s (CDPHE’s) Voluntary Cleanup
Program (VCP) for the redevelop of a 0.552-acre site for the construction of a restaurant with
surface parking as part of a broader community development program.On behalf of the Wheat
Ridge Urban Renewal Authority (URA), Terracon Consultants, Inc. (Terracon) is notifying the
CDPHE that the City of Wheat Ridge Brownfields Remediation site is applying for the tax credit
in accordance with SB14-073, Brownfield Contaminated Land Income Tax Credit.
The tax credit will be applied to project costs related to the remediation of the site based on the
VCP Application, which includes the removal and disposal of asbestos-containment materials,
excavation and disposal of impacted soil,BOS 100®injections, e-Redox system installation and
operation,and installation of a passive vapor mitigation system.The table below summarized the
anticipated remediation costs for the project redevelopment.
Remediation Activity Estimated Remedial Cost
ACM Removal,Confirmation Testing, and
Oversight
$16,070
Passive Vapor Mitigation Design $8,000
Passive Vapor Mitigation Installation $100,000
Soil Removal, Disposal and Testing $33,922
BOS 100 Injections $188,485
e-Redox System Design, Installation, and
Operation
$225,000
Post Injection and e-Redox Groundwater
Monitoring
$100,000
Terracon Consultants, Inc.10625 W. I-70 Frontage Rd N, Ste 3 Wheat Ridge, Colorado 80033
P [303] 423-3300 F [303] 423-3353 www.terracon.com
VOLUNTARY CLEANUP PROGRAM AMENDMENT
AND PARTIAL NO ACTION DETERMINATION
REQUEST
City of Wheat Ridge Brownfields Remediation
7690 West 38th Avenue
Wheat Ridge, Jefferson County, Colorado
February 5, 2019
Project No. 25147073
Prepared for:
Wheat Ridge Urban Renewal Authority
Wheat Ridge, Colorado
Prepared by:
Consultants, Inc.
Wheat Ridge, Colorado
TABLE OF CONTENTS
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PAGE NO
EXECUTIVE SUMMARY ............................................................................................................ 1
1.0 GENERAL INFORMATION ................................................................................................ 1
2.0 PROGRAM INCLUSION .................................................................................................... 3
3.0 HISTORICAL INVESTIGATIONS ...................................................................................... 3
3.1 Qualifications of Professionals ................................................................................... 4
3.2 Phase I Environmental Site Assessment – 2011 ........................................................ 4
3.3 Phase I Environmental Site Assessment – 2012 ........................................................ 4
3.4 Phase I Environmental Site Assessment – 2014 ........................................................ 5
3.5 Physical Characteristics of the Site ............................................................................ 5
3.6 Phase II Environmental Site Assessment – EARC 2012 ............................................ 6
3.7 Phase II Environmental Site Assessment – EPI 2013 ................................................ 6
3.8 Phase II Environmental Site Assessment – Family Environmental 2013 .................... 6
3.8.1 Soil Investigation Summary ......................................................................... 7
3.8.2 Groundwater Investigation Summary .......................................................... 7
3.9 First Remedial Design Characterization Investigation ................................................ 8
4.0 SUMMARY OF REMEDIATION ACTIVITIES ..................................................................... 8
4.1 Voluntary Cleanup Program ....................................................................................... 8
4.2 Asbestos Demolition Survey ...................................................................................... 9
4.3 Utility Disconnect & Building Demolition ................................................................... 10
4.4 Second Remedial Design Characterization Investigation ......................................... 10
4.5 Rule Authorization for BOS 100® Injection ............................................................... 10
4.6 BOS 100® Injections – Round One .......................................................................... 11
4.7 Excavation ............................................................................................................... 11
4.7.1 Southwest Excavation Area ....................................................................... 12
4.7.2 Northeast Excavation Area ........................................................................ 13
4.8 Third Remedial Design Characterization .................................................................. 13
4.9 Additional Monitoring Well Installation ...................................................................... 13
4.10 BOS 100® Injections – Round Two .......................................................................... 14
4.11 On-Going Groundwater Monitoring .......................................................................... 15
4.12 BOS-100® Performance Testing, Slug Testing, and Modeling .................................. 15
4.13 E-Redox Pilot Test ................................................................................................... 16
4.14 Additional Site Investigation ..................................................................................... 18
5.0 APPLICABLE STANDARDS/RISK DETERMINATION ................................................... 19
5.1 Exposure Pathways and Mitigation .......................................................................... 19
5.1.1 Soil Pathways ............................................................................................ 20
5.1.2 Groundwater Vapor Pathways ................................................................... 21
5.1.3 Groundwater Ingestion Pathways .............................................................. 21
6.0 REMEDIAL ACTION PLAN ............................................................................................. 22
6.1 Full-Scale Remediation of Groundwater .................................................................. 22
6.2 Vapor Mitigation System .......................................................................................... 23
7.0 PARTIAL NAD REQUEST ............................................................................................... 24
TABLE OF CONTENTS
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LIST OF EXHIBITS
Exhibit 1: Topographic Map
Exhibit 2: Site Diagram
Exhibit 3: RDC Monitoring Well & Soil Boring Location Map
Exhibit 4: BOS 100® Injection Map
Exhibit 5: Excavation Extents
Exhibit 6: Groundwater Potentiometric Map – 4Q18 – 12.20.18
Exhibit 7: PCE Isoconcentration Map – 4Q18 – 12.20.18
Exhibit 8: E-RedoxTM Pilot Study Map
Exhibit 9: Additional Site Investigation Locations – 06.23.18
Exhibit 10: Location of Regional Groundwater Wells
Exhibit 11: Full-Scale E-RedoxTM System Layout
LIST OF TABLES
Table 1: Summary of RDC Soil Analytical Results
Table 2: Injection Summary Table (Vista Geoscience)
Table 3: Detected Constituents in Soil
Table 4: Groundwater Elevation Measurements and Survey Data
Table 5: Groundwater Parameter Measurements
Table 6: Detected Constituents in Groundwater
Table 7: RPI Groundwater Analytical Results
Table 8: Slug Test Results
Table 9: VISL Calculator
Table 10: List of Regional Groundwater Wells
LIST OF APPENDICES
Appendix A: Phase I Environmental Site Assessment (June 10, 2011, Environmental
Assessment and Remediation Corporation for Bank of Denver)
Phase I Environmental Site Assessment (June 15, 2012, Prepared by Pickering,
Cole & Hivner for MQ Acquisition Partners 1, LLC)
Phase I Environmental Site Assessment (January 16, 2014, Prepared by RMC
Consultants for the City of Wheat Ridge)
Appendix B: Phase II Environmental Site Assessment (September 27, 2013, Prepared by
Family Environmental Compliance Services, Inc. for City of Wheat Ridge)
Appendix C: Voluntary Clean-up Program Application (December 10, 2013, Prepared by Family
Environmental Compliance Services, Inc. for City of Wheat Ridge)
Voluntary Cleanup Application Approval (January 7, 2014, Prepared by the
Colorado Department of Public Health and the Environment for City of Wheat
Ridge)
Appendix D: Asbestos Containing Materials Sampling and Inspection Report (December 31,
2013, Prepared by Family Environmental Compliance Services, Inc. for City of
Wheat Ridge)
ACM Abatement and Demolition Activities Summary Letter Report (July 8, 2015,
Prepared by Family Environmental Compliance Services, Inc. for City of Wheat
Ridge)
TABLE OF CONTENTS
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LIST OF APPENDICES (Cont’d)
Appendix E: Soil Excavation Summary Letter Report (January 16, 2015, Prepared by Family
Environmental Compliance Services, Inc. for City of Wheat Ridge)
Appendix F: BOS 100® Injection Event Report (May 3, 2015 Prepared by Vista Geoscience for
Terracon)
Remediation Injection Rule Authorization Application (October 27, 2014 Prepared
by Terracon Consultants, Inc. for the EPA)
Appendix G: Soil Boring Logs
Appendix H: Groundwater Analytical Laboratory Reports
Appendix I: Slug Test Results
Appendix J: Groundwater Modeling Results
Appendix K: Materials Management Plan (February 5, 2019, Prepared by Terracon for the City
of Wheat Ridge)
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EXECUTIVE SUMMARY
VOLUNTARY CLEANUP PROGRAM AMENDMENT AND
PARTIAL NO ACTION DETERMINATION REQUEST
CITY OF WHEAT RIDGE BROWNFIELDS REMEDIATION
7690 W. 38TH AVENUE
WHEAT RIDGE, JEFFERSON COUNTY, COLORADO
February 5, 2019
Project No. 25147073
EXECUTIVE SUMMARY
This Voluntary Cleanup (VCP) Application Amendment, submitted to the Colorado Department of
Public Health and the Environment (CDPHE) on behalf of the Wheat Ridge Urban Renewal
Authority (Wheat Ridge URA), provides an update on site activities to date and the remediation
plan going forward. The time to remediate the property is longer than originally proposed in the
VCP Application dated December 10, 2013, and approved on January 7, 2014. Also, the remedial
approach to achieve closure has changed.
The former Jefferson County Parcel ID 39-262-01-002 (0.077 acre) associated with 3790 Yukon
Court has been purchased by a developer (Quadrant Wheat Ridge Corners LLC) and is now part
of a larger parcel (39-262-01-013). The larger parcel (39-262-01-013) has been redeveloped into
various commercial properties. The former parcel (39-262-01-002) is now used as an asphalt
access road for entry into the larger parcel. Further work at the former parcel is not planned, and
Terracon is requesting a No Action Determination for the former Jefferson County Parcel ID 39-
262-01-002.
The VCP site now consists of an approximately 0.552-acre parcel of land located at 7690 West
38th Avenue (Jefferson County Parcel ID 39-262-01-001) in Wheat Ridge and Jefferson County,
Colorado. The site consists of a vacant gravel lot. A former 2,400 square-foot dry cleaner was
previously demolished as part of the previously approved VCP Application, and the former asphalt
paving was stripped during redevelopment of the surrounding properties. The site will be
redeveloped as part of a broader community development program. The redevelopment plan
includes the construction of a new commercial building (e.g., restaurant) with surface parking. A
Topographic Map showing the site location is included as Exhibit 1 and a Site Diagram is included
as Exhibit 2.
The scope of services provided by Terracon Consultants, Inc. (Terracon) and other consultants
to date include the following:
◼ Phase I Environmental Site Assessments (ESA);
◼ Health and Safety Plan (HASP) Preparation;
◼ Phase II ESA;
◼ Voluntary Clean-Up Program (VCP) Application Preparation;
Executive Summary
Wheat Ridge Brownfields Remediation ■ Wheat Ridge, Colorado
February 5, 2019 ■ Terracon Project No. 25147073
Responsive ■ Resourceful ■ Reliable 2
◼ Asbestos-Containing Materials (ACM) Pre-Demolition Survey;
◼ ACM Abatement and Building Demolition Activities;
◼ Impacted Soil Excavation;
◼ Remedial Design Characterization (RDC);
◼ BOS 100® Injection Events;
◼ On-Going Groundwater Monitoring;
◼ Additional Groundwater Testing, Slug Testing, and Modeling;
◼ E-Redox™ Pilot Test; and
◼ Additional Site Investigation.
Environmental Assessment and Remediation Corporation (EARC), Pickering, Cole, & Hivner
(PCH), and RMC Consultants, Inc. (RMC) completed Phase I ESAs for the site, reports dated
June 10, 2011, June 15, 2012, and January 16, 2014, respectively. The ESA findings are
summarized in the table below. More detailed site information (i.e., site histories, regulatory
records) is included in Appendix A. Phase I ESA information from the three Phase I ESAs are
summarized in the table below.
Historical Land Use
Based on review of available historic information, the subject property was
developed as a commercial property by 1963, including a 7‐Eleven convenience
store. The site was operated as a dry cleaner from approximately the late 1960s to
at least the early 1980s. In the early 2000s, the site was operated by Auto Nation as
its marketing department building. In the late 2000s, the site was utilized by various
automotive dealership operations including Champion Ford Boulder and Chesrown
Auto LLC, as listed in 2008.
Recognized
Environmental
Conditions (RECs)
The following RECs were identified:
◼ The historical use of the site as a gasoline station and a dry cleaner;
◼ The southeastern adjoining property use of an automobile dealership (and
accessory functions) was considered an historical REC; and
◼ The northern adjoining property use of a dry cleaning facility was considered a
controlled REC in connection with the subject property.
In addition, the following Business Environmental Risks were noted:
◼ The historical presence of mold growth and extensive mold damage apparent
in the interior of the subject property building as a result of an apparent water
pipe rupture; and
◼ The likely presence of ACM including painted or sprayed on ceiling texture
above the drop ceiling, ceiling tiles, and floor tiles with a recommendation for
additional asbestos inspection. (The ACM Investigation was completed by
Family Environmental on December 31, 2013).
Family Environmental Compliance Services, Inc. (Family Environmental) completed Phase II ESA
activities for the site, report dated September 27, 2013. More detailed site information is included
in Appendix B. Phase II ESA information is summarized in the table below.
Executive Summary
Wheat Ridge Brownfields Remediation ■ Wheat Ridge, Colorado
February 5, 2019 ■ Terracon Project No. 25147073
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Soil Information
A total of 18 soil borings (DP-1 through DP-18) were advanced to a maximum
drilling depth of approximately 25 feet below ground surface (bgs). Moderately
stiff to firm, light-brown to dark brown silt and sandy silt was encountered with
sand and sand with gravel intervals observed in some borings from 6 feet to 8
feet bgs and 12 feet to 14 feet bgs. A siltstone bedrock was encountered at
approximately 21 to 22 feet bgs.
Soil Analytical
Results
A total of 43 soil samples were collected from soil borings DP-1 through DP-6 and
DP-11 through DP-18. Soil samples were analyzed for volatile organic compounds
(VOCs). Tetrachloroethene (PCE), trichloroethene (TCE), cis-1,2-dichloroethene
(DCE), and vinyl chloride were detected in the soil borings; however, the detected
concentrations did not exceed their respective CDPHE Colorado Soil Evaluation
Values, which were applicable at the time.
Groundwater
Information
Temporary piezometers were installed in soil borings DP-1, DP-4, DP-6 through DP-
10 and DP-15 through DP-18. Three monitoring wells were installed off-site in the
northern right-of-way (ROW) of West 38th Avenue. Depth to groundwater was
observed during groundwater sampling events between approximately 10.5 feet to
15.6 feet bgs for the temporary piezometers and 9.5 feet and 13.5 feet bgs for the
monitoring wells. The apparent groundwater flow direction is to the northeast.
Family Environmental collected 15 groundwater samples for laboratory analysis of
VOCs from temporary piezometers DP-1, DP-4, DP-6 through DP-10 and DP-15
through DP-18 and monitoring wells MW-1, MW-2, and MW-3.
Groundwater
Analytical Results
Concentrations of PCE, TCE, cis-1,2-DCE, and vinyl chloride were detected in the
groundwater samples. The detected concentrations exceeded one or more of the
then-applicable CDPHE groundwater quality standards except temporary
piezometer DP-10 and monitoring well MW-3.
Soil Vapor Point
Information Soil vapor points were not installed.
Soil Vapor
Analytical Results Soil vapor samples were not collected.
On September 9, 2013, Terracon, Family Environmental, and Vista Geoscience (VGS) were on
site to perform the first RDC event for remedial design characterization for a BOS 100® injection
event. Boring locations and analytical results are illustrated in VGS’ BOS 100 Injection Event
Report (Appendix F).
Remedial Design
Characterization
A total of five boring locations (V0B-1 through V0B-5) were completed to depths of
20 feet bgs. Soil samples were collected at various depth intervals based on
photoionization detector (PID) screening results. One grab groundwater sample was
collected from boring V0B-5. PCE concentrations exceeded the CDHPE
groundwater protection value (GPV) in soil samples collected from borings V0B-4
(located north of the former sewer line) from 2 feet to 4 feet bgs and 8 feet to 10 feet
bgs. Groundwater results for boring V0B-5 were not included in the report; therefore,
the results are unavailable.
Executive Summary
Wheat Ridge Brownfields Remediation ■ Wheat Ridge, Colorado
February 5, 2019 ■ Terracon Project No. 25147073
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On December 10, 2013, Family Environmental submitted a VCP application to CDPHE in
accordance with Colorado Revised Statues (25-16-301, 1994) and Section 100.26 of the
Colorado Hazardous Waste Regulations (6 CCR 1007-3). VCP approval was provided on January
11, 2014. More detailed site information is included in the attached appendices.
VCP Application
The Remedial Action Plan (RAP) for the 2013 VCP Application included asbestos
demolition survey and removal, utility disconnect and building demolition, Remedial
Design Characterization (RDC), Environmental Protection Agency (EPA) Rule
Authorization (RA), BOS 100® remediation injections, soil excavation, additional
RDC, the installation of additional monitoring wells, and the first quarter of
groundwater monitoring requested by the CDPHE.
Family Environmental conducted an asbestos demolition survey of the former dry cleaner building
located at 3790 Yukon Court, Wheat Ridge, Colorado 80033. The survey was conducted on
December 13, 2013, by an Asbestos Hazard Emergency Response Act (AHERA)-accredited and
State of Colorado-certified asbestos inspector. More detailed site information is included in
Appendix D.
Asbestos
A total of 73 suspect ACM samples were collected from homogeneous areas. Two
friable materials were identified to contain asbestos: drywall surfacing (1.5%
chrysotile), cement/plaster surfacing on cement (3% chrysotile), popcorn surfacing
material on drywall (trace chrysotile), and tape joint compound associated with
bumpy surfacing material on drywall (trace chrysotile). Asbestos was not detected
in the suspect non-friable material samples collected from the building.
Various remediation-related and remediation activities have been conducted since the site
entered the VCP. More detailed site information is included in the attached appendices.
Asbestos
Abatement
Asbestos abatement of friable ACM located in the former dry cleaner building was
conducted by Peak Environmental between September 8 and 9, 2014, Inc. The
abatement scope included removing over 1,550 square feet (three side dump
trailers) of asbestos-containing drywall surfacing, cement/plaster surfacing on
cement, popcorn surfacing material on drywall, and tape joint compound associated
with bumpy surfacing material on drywall. Following abatement activities, Terracon
conducted a final visual inspection and conducted final air clearances.
Utility Disconnect
& Building
Demolition
Water and sewer disconnections were performed by Apex Plumbing Inc. in
September 2014. Based on a request by Wheat Ridge URA, both water and sewer
lines were capped and removed from the right of way (ROW). Gas disconnects were
performed by Xcel Energy, Inc. in the second half of October 2014 prior to the
demolition of the building. Building demolition was performed on October 24 and 25,
2014 by Wayne’s Construction Service, LLC.
Second Remedial
Design
Characterization
On November 3, 2014, Terracon and VGS were on site to perform the second RDC
event to gather additional data and assess the extent of subsurface impacts in the
source area, and to evaluate the soil excavation limits. A total of 27 RDC boring
locations were installed and converted to temporary wells between November 3 and
6, 2014 (Exhibit 3). PCE concentrations exceeded the CDPHE GPV in soil boring
Executive Summary
Wheat Ridge Brownfields Remediation ■ Wheat Ridge, Colorado
February 5, 2019 ■ Terracon Project No. 25147073
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RDC-8 and RDC-14. TCE concentrations exceeded the CDPHE GPV in soil boring
RDC-14.
BOS 100®
Injections –
Round One
Terracon prepared and submitted a Rule Authorization (RA) application for injecting
BOS 100® into the subsurface on October 27, 2014. The EPA approved the injection
plan on November 19, 2014. A total of 64 injection locations were completed by VGS
between December 8 and 15, 2014, in the source area of the former site building
(Exhibit 4).
Southwest
Excavation Area
Removal of source area soils beneath the former building pad occurred between
December 17 and 19, 2014 (Exhibit 5). Soil was segregated based on
photoionization (PID) readings and disposed off-site as non-hazardous waste. Soil
in the southwest excavation area was excavated to a depth of approximately 9 feet
to 10 feet bgs, unless groundwater or BOS 100® was encountered. The total
excavated volume of soil was approximately 410 cubic yards.
Nine (9) confirmation soil samples from the excavation side walls were collected at
depths ranging from 5 feet to 9 feet bgs. These soil samples were collected from the
north, east, and south walls and analyzed for VOCs. Soil samples from the west wall
were not collected based on the analytical results of soil samples collected from soil
boring RDC-19 during the VGS RDC event. Soil boring RDC-19 is located near the
west wall of the excavation. Soil samples were collected from 4 feet to 6 feet bgs, 6
feet to 8 feet bgs, and 8 feet to 10 feet bgs. Detected VOCs in the soil samples were
below the EPA Residential and Industrial RSLs and the CDPHE GPVs.
PCE was detected in one sample collected in the southeast section of the excavation
at a depth of 5 feet bgs (SE[5’]) at a concentration of 2.15 milligram per kilogram
(mg/kg), which was above the CDPHE’s GPV of 1.88 mg/kg. This area was
excavated an additional 6 feet beyond the original excavation wall. A sample was
collected along the new excavation wall (SE2[5’]) that yielded a result of 0.0157
mg/kg. Following soil removal and confirmation sampling, the excavation was
backfilled with backfill material from a documented source and compacted in-place.
Northeast
Excavation Area
During the VGS RDC event, analytical results from soil boring RDC-8 detected
impacts of PCE above the CDPHE GPV from 4 feet to 6 feet bgs. Soil in the
northeast excavation area was excavated to a depth of approximately 6 feet. The
total excavated volume of soil was approximately 15 cubic yards. Confirmation soil
samples were not collected based on the analytical results from the RDC event.
Following soil removal, the excavation was backfilled with fill material from a
documented source and compacted in-place.
Third Remedial
Design
Characterization
Based on the review of soil and groundwater analytical data from the RDC
investigation conducted November 3, 2014, Terracon recommended conducting a
third RDC investigation. The purpose of the additional RDC was to further evaluate
the horizontal and vertical extents of the soil and groundwater subsurface impacts.
The secondary objective was to obtain soil and groundwater analytical data for the
use in developing a revised injection work plan for the remaining BOS 100® that
was not injected in December 2014.
The third RDC event took place on December 22 and 23, 2014. During this event,
an additional five RDC soil borings were advanced and temporary monitoring wells
were placed by VGS, under the supervision of Terracon. RDC locations during this
event consisted of two soil borings and temporary wells for a total of 10 soil borings
Executive Summary
Wheat Ridge Brownfields Remediation ■ Wheat Ridge, Colorado
February 5, 2019 ■ Terracon Project No. 25147073
Responsive ■ Resourceful ■ Reliable 6
and temporary wells. Soil and groundwater samples were collected by VGS and
analyzed for VOCs.
Additional
Monitoring Well
Installation
Six additional two-inch monitoring wells (MW-03 through MW-09) were installed on
site to provide key injection point performance data within and downgradient of the
source area.
BOS 100®
Injections –
Round Two
VGS returned to the site on February 2, 2015, to complete BOS 100® injections at
the proposed permeable reactive barrier (PRB) area and the area between the
source area and the PRB. An additional 111 injections were completed for a total of
175 injection locations (Exhibit 4). An additional 5,373 pounds of BOS 100® were
injected during this event for a total of 10,873 pounds injected at the site. Each
injection point was properly abandoned following the injection events.
On-Going
Groundwater
Monitoring
Quarterly groundwater monitoring has occurred at this site since March 2015. From
March 2015 to December 2018, an average reduction in PCE concentrations of 70%
has been observed in monitoring wells MW-01 through MW-09. Monitoring wells
MW-2, MW-4, MW-8 and MW-9 have concentrations of PCE exceeding the CDPHE-
approved groundwater standard for the site of 17 micrograms per liter (µg/L).
Concentrations of TCE exceed the CDPHE groundwater standard in monitoring well
MW-4 and MW-8. Concentrations of VC exceed the CDPHE groundwater standard
in monitoring well MW-6R (Exhibit 8).
Additional
Groundwater
Monitoring, Slug
Testing, and
Modeling
During the April 2017 groundwater sampling event, split groundwater samples were
collected for additional analysis by Remediation Products, Inc. (RPI) to evaluate if
BOS 100 was actively remediating the impacted groundwater. Methane and ethane,
byproducts of PCE degradation, were detected in monitoring well MW-4 indicating
that remediation of PCE was occurring at this site.
On April 26, 2017, Terracon conducted slug tests at monitoring wells MW-4, MW-6,
and MW-8 to evaluate the current subsurface hydraulic conductivity and calculate
the seepage velocity. The hydraulic conductivity was calculated to be 7.71x10-4
centimeters per second (cm/sec). The estimated seepage velocity is 93.36 feet per
year (ft/yr).
The results of the additional groundwater testing and slug tests conducted at the site
were used to model downgradient PCE concentrations in groundwater near the
commercial building across West 38th Avenue. The EPA’s BIOCHLOR fate and
transport model was used. Based on the results of the model, additional groundwater
remediation was required.
E-Redox™ Pilot
Study
A four-month E-Redox™ pilot test was conducted, in the heart of the PCE
groundwater plume near monitoring well MW-4, from November 2, 2017 to March
29, 2018. The E-Redox™ pilot study consisted of two anodes and two cathodes
placed around monitoring well MW-4 (Exhibit 8). Performance groundwater
monitoring was conducted during the four-month pilot study. An approximate 35%
reduction in PCE concentrations was observed at monitoring well MW-4 during the
four-month period.
Additional Site
Investigation
On June 23, 2018, Terracon installed three temporary monitoring wells (Temp-1,
Temp-2, and Temp-3), west of monitoring well MW-9, to further assess potential
subsurface soil and groundwater impacts (Exhibit 9). The temporary monitoring
wells were advanced to an approximate depth of 20 feet bgs.
Executive Summary
Wheat Ridge Brownfields Remediation ■ Wheat Ridge, Colorado
February 5, 2019 ■ Terracon Project No. 25147073
Responsive ■ Resourceful ■ Reliable 7
PCE was detected in the soil sample collected from temporary monitoring well
Temp-2 at a concentration of 0.00457 mg/kg; however, the detection is below the
EPA Residential and Industrial RSLs and the CDPHE GPV. Chlorinated solvents
were not detected in the soil samples collected from temporary monitoring wells
Temp-1 and Temp-3.
PCE was detected in groundwater samples collected from temporary monitoring
wells Temp-1 (7.6 µg/L) and Temp-3 (3.22 µg/L). However, the detections are below
the CDPHE-approved groundwater standard for the site of 17 µg/L.
Based on the anticipated development activities, impacts identified during the site assessment,
and proposed development activities, the Groundwater Ingestion (GWIng) and Groundwater Vapor
Inhalation (GWInh) exposure pathway is or will be complete or reasonably anticipated to be
completed during the implementation of the development and or remedial activities.
The proposed Remedial Action Plan (RAP) for the site considers action to mitigate and reduce
long-term exposures to chlorinated solvent impacts to subsurface groundwater. A full-scale E-
Redox™ remediation system will be installed to remediate chlorinated solvent impacts in the
groundwater. Depending on the timing of redevelopment and current concentrations of
chlorinated solvents in the groundwater, installation of a passive vapor mitigation system (VMS)
may be required at the site. If required, a site-specific passive VMS will be designed and installed
underneath the proposed commercial building. A deed restriction or environmental covenant may
be instituted for the property to establish ongoing controls.
Based on the site investigations conducted on former parcel (39-262-01-002), Terracon is
requesting a NAD. Subsurface soil and groundwater impacts were not found on this former parcel
and investigations conducted on parcel (39-262-01-001), northern adjacent property, have not
indicated that subsurface soil or groundwater impacts from the former dry cleaner operations,
conducted on the property, extended south to the former parcel (39-262-01-002).
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VOLUNTARY CLEANUP PROGRAM AMENDMENT AND
PARTIAL NO ACTION DETERMINATION REQUEST
CITY OF WHEAT RIDGE BROWNFIELDS REMEDIATION
7690 W. 38TH AVENUE
WHEAT RIDGE, JEFFERSON COUNTY, COLORADO
February 5, 2019
Project No. 25147073
1.0 GENERAL INFORMATION
This Voluntary Cleanup (VCP) Application Amendment, submitted to the Colorado Department of
Public Health and the Environment (CDPHE) on behalf of the Wheat Ridge Urban Renewal
Authority (Wheat Ridge URA), provides an update on site activities to date and the remediation
plan going forward. The time to remediate the property is longer than originally proposed in the
VCP Application dated December 10, 2013, and approved on January 7, 2014. Also, the remedial
approach to achieve closure has changed.
The former Jefferson County Parcel ID 39-262-01-002 (0.077 acre) associated with 3790 Yukon
Court has been purchased by a developer (Quadrant Wheat Ridge Corners LLC) and is now part
of a larger parcel (39-262-01-013). The larger parcel (39-262-01-013) has been redeveloped into
various commercial properties. The former parcel (39-262-01-002) is now used as an asphalt
access road for entry into the larger parcel. Further work at the former parcel is not planned, and
Terracon is requesting a No Action Determination for the former Jefferson County Parcel ID 39-
262-01-002.
The VCP site now consists of an approximately 0.552-acre parcel of land located at 7690 West
38th Avenue (Jefferson County Parcel ID 39-262-01-001) in Wheat Ridge and Jefferson County,
Colorado. The site consists of a vacant gravel lot. A former 2,400 square-foot dry cleaner was
previously demolished as part of the previously approved VCP Application, and the former asphalt
paving was stripped during redevelopment of the surrounding properties. The site will be
redeveloped as part of a broader community development program. The redevelopment plan
includes the construction of a new commercial building (e.g., restaurant) with surface parking. A
Topographic Map showing the site location is included as Exhibit 1 and a Site Diagram is included
as Exhibit 2.
Implementation of the procedures outlined in this document should facilitate the protection of
public health and the environment during redevelopment activities.
ITEM DESCRIPTION
Site Address 7690 West 38th Avenue, Wheat Ridge, Jefferson County, Colorado
Site Area Approximately 0.552 acre per the Jefferson County Assessor
Parcel Number(s) 39-262-01-001 per the Jefferson County Assessor
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ITEM DESCRIPTION
Current Land Use Commercial
Current Zoning MU-C (mixed use commercial) per the Jefferson County Assessor
Current Ground Cover Vacant gravel lot
Elevation/Topography Approximately 5,455 feet above sea level, sloping south to north
Proposed Construction Commercial Building
Property Owner
Wheat Ridge Urban Renewal Authority (URA)
7500 West 29th Avenue
Wheat Ridge, Colorado
Owner Representative Steve Art, Wheat Ridge URA Economic Development Manager and
Executive Director (303) 235-2806
Prepared For
Colorado Department of Public Health and Environment (CDPHE)
HMWMD-RP-B2
Attn: Mr. Fonda Apostolopoulos
4300 Cherry Creek Drive South
Denver, Colorado 80246-1530
(303) 692-3411
Contact Person
Terracon Consultants, Inc.
Mark E. White, P.G.
10625 West I-70 Frontage Road North, Suite 3
Wheat Ridge, Colorado 80033
(303) 454-5208
Terracon services conducted to date on this property were performed in a manner consistent with
generally accepted practices of the profession undertaken in similar studies in the same
geographical area during the same time. Terracon makes no warranties, either express or implied,
regarding findings, conclusions, or recommendations. Please note that Terracon does not warrant
the work of laboratories, regulatory agencies, or other third parties supplying information used in
the preparation of the report. This document was prepared in accordance with the scope of work
agreed to by the Wheat Ridge URA, as reflected in our proposal (25147073).
Any approaches, plans, findings, conclusions, and recommendations presented in this document
are based upon information derived from assessment and survey activities conducted by
Terracon and other environmental consultants. Such information is subject to change over time.
Certain indicators of the presence of hazardous substances, petroleum products, or other
constituents may have been latent, inaccessible, unobservable, non-detectable, or not present
during these services. We cannot represent that the site contains no hazardous substances, toxic
materials, petroleum products, or other latent conditions beyond those identified during previous
assessments conducted for the site by Terracon or others. The data, interpretations, approaches,
plans, findings, and any recommendations are based solely upon data obtained at the time and
within the scope of those services.
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2.0 PROGRAM INCLUSION
For VCP eligibility, the following criteria must be met for the above-mentioned property. An answer
“No” to Question 1 or “Yes” to any of Questions 2 through 6 would disqualify this property from
the program.
CRITERIA YES / NO
Is the applicant the owner or the owner’s designated representative of the property? Yes
Is the property listed or proposed for listing on the National Priorities List of Superfund
Sites established under the Federal Act (CERCLA)? No
Is the property the subject of corrective action under orders or agreement issued pursuant
to provisions of Part 3 of Article 15 of this Title or the federal RCRA of 1976, as amended? No
Is the property subject to an order issued by or an agreement (including permits) with the
Water Quality Control Division pursuant to Part 6 of Article 8 of this Title? No
Is the property a facility that has or should have a permit or interim status pursuant to Part
3 of Article 15 of this Title (RCRA Subtitle C) for treatment, storage, or disposal of
hazardous waste?
No
Is the property subject to the provisions of Colorado Revised Statutes, Part 5 of Article 20
of Title 8 (Underground Storage Tanks)? No
3.0 HISTORICAL INVESTIGATIONS
The following site investigations have been completed for the site. The findings from these
investigations are summarized in the sections below.
REPORT DATE ATTACHMENT
Phase I Environmental Site Assessment (ESA),
Environmental Assessment and Remediation Corporation
(EARC)
6-10-2011 Appendix A
Phase I ESA, Pickering, Cole, & Hivner (PCH) 6-15-2012 Appendix A
Limited Subsurface Soil and Ground Water Investigation for
the Yelenick Trust Property (7690 West 38th Avenue &
3790 Yukon Court) – EARC
7-5-2012
Full report not
available.
Results on
figures in
Appendix B. Environmental Property Investigators (EPI) Phase II ESA 6-11-2013
Phase II ESA, Family Environmental 9-27-2013 Appendix B
Voluntary Clean-Up Program Application and Approval
Letter, Family Environmental
12-10-2013
1-7 2014
Appendix C
Asbestos-Containing Materials Investigation, Family
Environmental
12-31-2013 Appendix D
Phase I ESA, RMC Consultants, Inc. (RMC) 1-16-2014 Appendix A
Soil Excavation Letter Report, Family Environmental 1-16-2015 Appendix E
BOS 100® Injection Event Report (including three RDC
investigation information), Vista Geoscience (VGS) 5-3-2015 Appendix F
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3.1 Qualifications of Professionals
Qualified professionals were involved in the preparation of both the Phase I ESAs (Appendix A),
Phase II ESA (Appendix B), the existing VCP Application (Appendix C), the Asbestos-Containing
Materials (ACM) Investigation (Appendix D), the Soil Excavation Letter Report (Appendix E), the
BOS 100® Injection Event Report (Appendix F), and this VCP Application Amendment.
3.2 Phase I Environmental Site Assessment – 2011
A Phase I ESA for the site was completed by EARC for the Bank of Denver, report dated June
10, 2011, in general accordance with American Society for Testing and Materials (ASTM) E1527-
05. EARC indicated the following as recognized environmental conditions (RECs) in connection
with the site:
◼ The historical presence of mold growth and extensive mold damage apparent in
the interior of the subject property building as a result of an apparent water pipe
rupture; and
◼ The likely presence of ACM including painted or sprayed on ceiling texture above
the drop ceiling, ceiling tiles, and floor tiles with a recommendation for additional
asbestos inspection. (The ACM Investigation was completed by Family
Environmental on December 31, 2013).
Terracon notes that these Business Environmental Risk findings are non-ASTM scope services
related to Phase I ESAs but do not meet the definition of a REC. The resumes and qualifications
of the EARC personnel that participated in preparing the 2011 Phase I ESA are included in the
report in Appendix A.
3.3 Phase I Environmental Site Assessment – 2012
A Phase I ESA for the site was completed by PCH for MQ Acquisition Partners 1, LLC, report
dated June 15, 2012, in general accordance with ASTM E1527-05 The Phase I ESA was
conducted primarily on 3765 Wadsworth Boulevard but also included 3795 Wadsworth Boulevard
and 3790 Yukon Court (historically listed as 7690 West 38th Avenue which includes this site).
The following RECs were identified in connection with the site:
◼ The historical use of the site as an automotive dealership including an auto
maintenance shop and an auto body repair shop (referring to 3765 Wadsworth
Boulevard), a gasoline station (referring to 7690 West 38th Avenue), and a dry
cleaner (referring to 7690 West 38th Avenue);
◼ The historical use, storage, and disposal of automotive lubricants, solvents, and
hydraulic fluid associated with the automotive dealership (referring to 3765
Wadsworth Boulevard);
◼ The historical storage of waste oil in both an underground storage tank (UST) and
later an aboveground storage tank (AST) with oil staining observed on the floor
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around the AST and associated trench drains (referring to 3765 Wadsworth
Boulevard);
◼ The historical presence of in-ground hydraulic lifts and other above-floor lift
equipment (referring to 3765 Wadsworth Boulevard); and
◼ The historical presence of in-ground oil/water separators (referring to 3765
Wadsworth Boulevard).
The resumes and qualifications of the PCH personnel that participated in preparing the 2012
Phase I ESA are included in the report in Appendix A.
3.4 Phase I Environmental Site Assessment – 2014
A Phase I ESA was completed for the site by RMC for the City of Wheat Ridge, report dated
January 16, 2014, in general accordance with ASTM E1527-05. The following RECs were
identified in connection with the site:
◼ The historical use of the subject property as a dry cleaning facility;
◼ The southeastern adjoining property use of an automobile dealership (and
accessory functions) was considered an historical REC;
◼ The northern adjoining property use of a dry cleaning facility was considered a
controlled REC in connection with the subject property;
◼ Four 55-gallon drums observed on site at the time of inspection;
◼ Four 1‐inch interior piezometers observed on site at the time of inspection;
◼ Three Interior and several exterior borings observed on site at the time of
inspection;
◼ Two listed facilities located adjacent to the subject property; and
◼ One listed LUST TRUST facility located approximately 370 feet to the east of the
subject property.
The resumes and qualifications of the RMC personnel that participated in preparing the 2014
Phase I ESA are included in the report in Appendix A.
3.5 Physical Characteristics of the Site
According to the last Phase I ESA completed for the site and known current site conditions, the
following statements apply to the site.
◼ The topographic surface of the site slopes gently north to south.
◼ There are no surface water bodies/impoundments or wastewater discharge points.
◼ There are no loading docks with hydraulic lifts.
◼ There are no railcar-loading areas.
◼ There are no chemical and/or fuel transfer and pumping stations.
◼ There are no spill collection sumps or stormwater drainage/collection systems.
◼ There are no wastewater treatment units.
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◼ Four 55-gallon drums observed on site at the time of the Phase I ESA. The drums
were in good condition with no signs of leakage. Currently, there is one purge water
drum stored on site for on-going groundwater monitoring events. When the drum
is full, the drum is transported off-site to a landfill for disposal and replaced with a
new drum.
◼ There are no surface/stormwater retention ponds or discharge points observed.
◼ There are no known in-service USTs on-site.
◼ There are no air-emission control scrubber units.
◼ There are no known French drains or leach fields.
3.6 Phase II Environmental Site Assessment – EARC 2012
A Phase II ESA for the site was completed by EARC for Louise LLC, report dated July 5, 2012,
in general accordance with ASTM E1903-11 to evaluate potential impacts to soil and groundwater
associated with RECs identified at that time. Three soil borings were advanced during EARC’s
Phase II ESA. Soil and groundwater samples were collected from the three borings and analyzed
for volatile organic compounds (VOCs) using EPA Method 8260B. Soil sample analytical results
were below the United States Environmental Protection Agency’s (EPA’s) Residential and
Industrial Regional Screening Levels (RSLs). Groundwater samples collected from borings B2
and B3 had concentrations of tetrachloroethene (PCE) and trichloroethene (TCE) above the
groundwater standards included in the CDPHE Colorado Soil Evaluation Values (CSEVs) table,
which were applicable at the time. The EARC’s Phase II ESA report was not available for
Terracon’s review; however, the boring locations and analytical results are shown in Family
Environmental’s Phase II ESA figures and tables as discussed below and is included in Appendix
B.
3.7 Phase II Environmental Site Assessment – EPI 2013
A Phase II ESA for the site was completed by EPI for Louise LLC, report dated on June 11, 2013,
in general accordance with ASTM E1903-11 for the site to evaluate potential impacts to soil and
groundwater associated with the RECs identified at that time. Six soil borings were installed during
EPI’s Phase II ESA. Soil and groundwater samples were collected from the borings and analyzed
for VOCs using EPA Method 8260B. Soil sample analytical results were below EPA‘s Residential
and Industrial RSLs. Groundwater samples collected from borings SB4 and SB5 had
concentrations of PCE and TCE above the groundwater standards included in the CDPHE
Colorado Soil Evaluation Values (CSEVs) table. EPI’s Phase II ESAs report was not available for
Terracon’s review; however, the boring locations and analytical results are shown in Family
Environmental’s Phase II ESA figures and tables discussed below and is included in Appendix B.
3.8 Phase II Environmental Site Assessment – Family Environmental 2013
A Phase II ESA for the site was completed by Family Environmental for the City of Wheat Ridge,
report dated September 27, 2013, in general accordance with ASTM E1903-11 for the site to
evaluate potential impacts to soil and groundwater associated with the aforementioned RECs.
Family Environmental reviewed two prior “limited Phase II ESAs” conducted by EARC and EPI
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(see above). The 2013 Phase II ESA by Family Environmental consisted of advancing a total of
18 borings to a maximum drilling depth of approximately 25 feet below ground surface (bgs) to
collect soil and groundwater samples for laboratory analysis. Soil vapor samples were not
collected. Additionally, three monitoring wells were installed off-site (MW-01, MW-02, and MW-
03). The locations of the soil borings are illustrated in the Phase II ESA report provided in
Appendix B. A summary of the Phase II ESA activities is provided below.
3.8.1 Soil Investigation Summary
Family Environmental collected soil samples from borings DP-1 through DP-6 and DP-11 through
DP-18 from the unsaturated zone for VOC analysis. A total of 43 soil samples were collected as
summarized below.
◼ On August 21, 2013, 14 borings (DP-1 through DP-14) were advanced to a
maximum drilling depth of approximately 25 feet bgs. Soil samples were collected
from borings DP-1 through DP-6 and DP-11 through DP-14. Soil samples were not
collected from soil borings DP-7 through DP-10 since these locations were
selected to assess groundwater concentrations at the site boundary. In general,
subsurface investigation encountered moderately stiff to firm, light-brown to dark
brown silt and sandy silt with sand and sand with gravel intervals observed in some
borings from 6 feet to 8 feet bgs and 12 feet to 14 feet bgs. A siltstone bedrock
was encountered at approximately 21 to 22 feet bgs. The soil was screened during
drilling activities with a photoionization detector (PID) to assess potential for
presence of VOCs.
◼ The results and field observations from this sampling were reportedly discussed
with the Wheat Ridge URA and Mr. Fonda Apostolopoulos of the CDPHE.
Following this meeting, the Wheat Ridge URA requested additional drilling. Four
additional borings (DP-15 through DP-18) were advanced on September 6, 2013,
and soil samples were collected. Soil samples were submitted to ESC Lab
Sciences (now Pace Analytical) for VOC analysis using EPA Method 8260B. Three
monitoring wells (MW-1, MW-2, and MW-3) were also installed in the northern
right-of-way (ROW) of West 38th Avenue. Soil samples were not collected from
these borings.
◼ PCE, TCE, cis-1,2-dichloroethene (DCE), and vinyl chloride were detected in
multiple soil samples collected from the soil borings; however, the detected
concentrations did not exceed their respective CDPHE CSEVs.
3.8.2 Groundwater Investigation Summary
Family Environmental collected 15 groundwater samples from temporary piezometers DP-1, DP-
4, DP-6 through DP-10, DP-15 through DP-18, and monitoring wells MW-1, MW-2, and MW-3.
Groundwater depths and analytical results are summarized below.
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◼ Temporary piezometers were installed in soil borings DP-1, DP-4, DP-6 through
DP-10, and DP-15 through DP-18. Depth to groundwater was observed during
groundwater sampling events between approximately 10.5 feet to 15.6 feet bgs for
the temporary piezometers and 9.5 feet and 13.5 feet bgs for the monitoring wells.
The apparent groundwater flow direction is to the northeast.
◼ The groundwater samples were submitted to ESC Lab Sciences (now Pace
Analytical) for laboratory analysis of VOCs using EPA Method 8260B.
Concentrations of PCE, TCE, cis-1,2-DCE, and vinyl chloride were detected in
multiple groundwater samples. The detected concentrations in the groundwater
samples exceeded one or more of the CDPHE Colorado Groundwater Quality
Standard (CGWQS), except the groundwater sample collected from temporary
piezometer DP-10 and monitoring well MW-3.
3.9 First Remedial Design Characterization Investigation
On September 9, 2013, Family Environmental and VGS were on site to perform the first RDC
event for remedial design characterization for a BOS 100® injection event. A total of five boring
locations (V0B-1 through V0B-5) were completed to depths of 20 feet bgs. Soil samples were
collected at various depth intervals based on PID screening results. One grab groundwater
sample was collected from boring V0B-5. PCE concentrations exceeded the CDHPE groundwater
protection value (GPV) in soil samples collected from borings V0B-4 (located north of the former
sewer line) from 2 feet to 4 feet bgs and 8 feet to 10 feet bgs. Boring locations and analytical
results are illustrated in VGS’ BOS 100 Injection Event Report (Appendix F). Groundwater results
for boring V0B-5 were not included in the report.
4.0 SUMMARY OF REMEDIATION ACTIVITIES
Based on information presented in the Phase II ESAs and first RDC investigation, PCE was
reported in samples collected in shallow soil adjacent to, and below, the building. It was believed
that the chlorinated solvents reported in the shallow soil were leaching into deeper soils and into
groundwater. The site was entered into the VCP. A summary of remediation activities and
associated remedial design characterization and site investigations conducted, since the site was
enrolled in the VCP, are detailed in the sections below.
4.1 Voluntary Cleanup Program
On December 10, 2013, Family Environmental submitted a VCP application to CDPHE in
accordance with Colorado Revised Statues (25-16-301, 1994) and Section 100.26 of the
Colorado Hazardous Waste Regulations (6 CCR 1007-3). The VCP document is included as
Appendix C to this report. VCP approval was provided on January 11, 2014. The VCP Approval
Letter is included in Appendix C.
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The Remedial Action Plan (RAP), submitted as part of the 2013 VCP Application, included
asbestos demolition survey and removal, utility disconnections and building demolition, Remedial
Design Characterization (RDC), EPA Rule Authorization (RA), BOS 100® remediation injections,
soil excavation, additional RDC, the installation of additional monitoring wells, and first quarter of
groundwater monitoring as requested by the CDPHE.
4.2 Asbestos Demolition Survey
As outlined in the 2013 VCP, the building would be demolished to allow for excavation of impacted
soil. Prior to building demolition, ACM would need to be surveyed and abated from the existing
building.
Family Environmental conducted an asbestos demolition survey of the former dry cleaner building
located at the site. The survey was conducted on December 13, 2013, by an Asbestos Hazard
Emergency Response Act (AHERA)-accredited and State of Colorado-certified asbestos
inspector. A total of 73 suspect ACM samples were collected from homogeneous areas. Two
friable materials were identified to contain asbestos based on Polarized Light Microscopy (PLM)
and 400-point count analysis. Asbestos was not detected in the suspect non-friable material
samples collected from the building. The following lists the finding of the asbestos demolition
survey:
◼ Friable ACM drywall surfacing (1.5% chrysotile);
◼ Friable ACM cement/plaster surfacing on cement (3% chrysotile);
◼ Friable popcorn surfacing material on drywall (trace chrysotile); and
◼ Friable tape joint compound associated with bumpy surfacing material on drywall
(trace chrysotile).
According to the Family Environmental report, the sampling and inspection process was
conducted in accordance with standards of the EPA 40 Code of Federal Regulations (CFR) Part
763 Subpart E, the EPA 40 CFR Part 61, National Emission Standards for Hazardous Air
Pollutants (NESHAP), and CDPHE Regulation No. 8. Further regulatory overview can be found
in Appendix D.
Asbestos abatement of friable ACM located in the former dry cleaner building occurred between
September 8 and September 9, 2014. Abatement was performed by Peak Environmental, Inc., a
Colorado Certified General Abatement Contractor. During abatement, Terracon conducted
project monitoring and management to evaluate removal methods and document compliance with
CDPHE Air Quality Control Commission, Regulation 8, Control of Hazardous Air Pollutants, and
AHERA regulations. The abatement scope included the removal of over 1,550 square feet (three
side dump trailers) of asbestos-containing drywall surfacing, cement/plaster surfacing on cement,
popcorn surfacing material on drywall, and tape joint compound associated with bumpy surfacing
material on drywall. Following abatement activities, Terracon conducted a final visual inspection
and conducted final air clearances.
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4.3 Utility Disconnect & Building Demolition
Water and sewer disconnections were performed by Apex Plumbing Inc. in September 2014. As
requested by Wheat Ridge URA, both water and sewer lines were capped and removed from the
ROW. Gas disconnects were performed by Xcel Energy, Inc. in the second half of October 2014
prior to the demolition of the building. Building demolition was subsequently performed on
October 24 and 25, 2014 by Wayne’s Construction Service, LLC.
4.4 Second Remedial Design Characterization Investigation
On November 3, 2014, Terracon was on site to perform a second RDC event. The objective of
the November 2014 RDC event was to gather additional data, refine the understanding the extent
of chlorinated solvents in the source area, and to more accurately define the proposed soil
excavation limits. A total of 27 RDC borings were advanced by VGS and temporary wells installed
between November 3 and 6, 2014. Boring locations are shown on Exhibit 3. Six of the RDC
locations (RDC-3, RDC-4, RDC-17, RDC-19, RDC-23, and RDC-24) included the installation of
two temporary wells at different depths to evaluate the vertical migration of chlorinated solvent
impacts. Soil samples were collected every two feet from the ground surface to the 20 feet bgs.
A grab groundwater sample was collected at some locations. Soil and groundwater samples were
submitted to RPIs laboratory for analysis of VOCs (EPA Method 8260B). RPI is not a NELAP-
accredited laboratory; however, these samples were collected for initial design and screening
purposes and not used to obtain closure.
PCE concentrations exceeded the CDPHE GPV in soil borings RDC-8, RDC-14, and RDC-20.
TCE concentrations exceeded the CDPHE GPV in soil boring RDC-14. Soil analytical results are
summarized in Table 1. Soil boring RDC-8 was located to the northeast of the former building
footprint and appeared to be a second source area of chlorinated solvent impacts to the
subsurface.
Groundwater sample results exceeded the CGWQS for various chlorinated solvents in temporary
wells RDC-2, RDC-3, RDC-5, RDC-7, RCD-16, RDC-17, RDC-18, RDC-20, RDC-23, and RDC-
24. Groundwater analytical results are summarized in Table 7. More detailed information on the
RDC event can be found in the VGS Injection Report in Appendix F. Soil boring logs can be found
in Appendix G.
4.5 Rule Authorization for BOS 100® Injection
Terracon prepared and submitted a Rule Authorization (RA) application to the EPA for injecting
BOS 100® into the subsurface on October 27, 2014. The EPA approved the injection plan on
November 19, 2014. A copy of the RA is included in Appendix F.
BOS 100® is a specialized catalyst manufactured by Remediation Products, Inc., used to trap and
treat source-area soil and groundwater impacted by chlorinated solvents and to limit migration of
impacted groundwater off-site. Periodic injections of BOS 100®, which consist of activated carbon
that has been saturated with metallic iron, are designed to promote the in-situ, enhanced
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biodegradation of dissolved chlorinated solvents, such as PCE and TCE, in site groundwater (RPI,
2013). The product is granular and when injected results in seams of the product in silt and clay
formations that form preferential pathways throughout the formation. This enhances contact and
provides a long-term mechanism for remediation.
Following the November 2014 RDC event, the RA application proposed injecting 6,510 pounds
of BOS 100® into 174 temporary injection points at three specific areas of the site based on RPI’s
design. Two of the areas were located in the suspected source areas beneath the former site
building and immediately southwest of the former site building. The third injection area was
located on the northern, downgradient edge of the property with the intention to act as a boundary
treatment, permeable reactive barrier (PRB), to reduce off-site migration of dissolved chlorinated
solvents.
4.6 BOS 100® Injections – Round One
Following the November 2014 RDC investigation and EPA approval of the RA application, initial
BOS 100® injection activities began. A total of 64 injection locations were completed by VGS
between December 8 and 15, 2014, utilizing a Geoprobe® brand 7820 direct push drilling rig.
Initial injections were only completed at the site in the source area below the former site building
during this event. Approximately half of the BOS 100® prescribed for the site was used
(approximately 5,500 pounds). The geological formation prevented the injection of original
proposed quantities. Additional injections in the proposed second and third areas were postponed
to conduct additional RDC investigation to determine alternative injection locations for the
remaining BOS 100® not used in the source area.
During the injection activities, injection flow rates and back pressures were monitored at the
injection pump. Injection back pressures ranged from approximately 0 pounds to 25 pounds per
square inch (psi), and average injectate flow rates were observed at approximately 10 gallons per
minute (gpm). Since positive back pressure was observed during most of the injection period,
VGS concluded that the pipe was full during the injection period and that injectate was distributed
along the length of the borehole.
After injections were complete, each injection point was abandoned with hydrated bentonite and
the surface was patched to match surrounding asphalt. The performance of the BOS 100®
injections was evaluated by periodically monitoring groundwater samples collected from the site.
The locations of the injections are illustrated on Exhibit 4. Injection logs from VGS are included
as Table 2. For further detail on the injection event, see VGS Injection Report in Appendix F.
4.7 Excavation
Family Environmental’s Phase II ESA identified shallow PCE-impacted soil underneath the former
dry cleaner building concrete slab as the source area of PCE migration. It is believed that PCE
migration from underneath the building occurred due to leaching of shallow soils into deeper soils
which impacted groundwater. A second source, separate from the former building footprint, was
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discovered near soil boring RDC-8 during the VGS RDC event (Exhibit 3 and Table 1), as
discussed in Section 4.4.
Terracon and Family Environmental personnel were on site during soil excavation activities
between December 17 and 19, 2014, to observe excavated material for potential environmental
impacts per the CDPHE-approved VCP Application. Shallow PCE-impacted soil was excavated
and transported off-site for disposal. During the excavation activities, soil was segregated based
on PID readings and disposed off-site as non-hazardous waste at Tower Landfill/Foothills Landfill.
The soil excavation extents are shown on Exhibit 5. Confirmation soil samples were collected by
Family Environmental, under the supervision of Terracon, as discussed in the sections below and
are summarized on Table 3. The soil samples were submitted to Summit Scientific, a NELAP
accredited laboratory, for laboratory analysis.
4.7.1 Southwest Excavation Area
Soil in the southwest excavation area was excavated to a depth of approximately 9 feet to 10 feet
bgs, unless standing water or BOS 100® was encountered. The total excavated volume of soil
was approximately 410 loose cubic yards.
When excavation of impacted soils was completed, nine confirmation soil samples were collected
from the excavation walls at depths ranging from 5 feet to 9 feet bgs. These soil samples were
collected from the north, east, and south walls. Soil samples from the west wall were not collected
based on the analytical results during the VGS RDC event (Appendix F). Soil samples from the
west wall were not collected based on the analytical results of soil samples collected from soil
boring RDC-19 during the VGS RDC event. Soil boring RDC-19 is located near the west wall of
the excavation. Soil samples were collected from 4 feet to 6 feet bgs, 6 feet to 8 feet bgs, and 8
feet to 10 feet bgs. Detected VOCs in the soil samples were below the EPA Residential and
Industrial RSLs and the CDPHE GPVs.
Soil samples were submitted to Summit Scientific in Golden, Colorado for analysis for VOCs by
EPA Method 8260B. Details of the excavation and subsequent sampling can be found in the
attached Family Environmental Excavation Letter Report included in Appendix E.
PCE was reported in the soil sample collected at a depth of 5 feet bgs (SE[5’]) on the southeast
section of the excavation at 2.15 milligrams per kilogram (mg/kg), above the CDPHE’s GPV of
1.88 mg/kg. The area where the impacted sample was collected was excavated an additional 6
feet east beyond the original excavation wall. The additional excavation area can be seen on
Exhibit 5. A sample was collected along the new excavation wall (SE2[5’]) that yielded a result of
0.0157 mg/kg. A summary of the soil sampling results can be found in the Family Environmental
Excavation Letter Report in Appendix E.
Following soil removal and confirmation sampling, the excavation was backfilled with backfill
material from a documented source and compacted in-place.
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4.7.2 Northeast Excavation Area
During the VGS RDC event (Appendix F), analytical results from soil boring RDC-8 reported
impacts of PCE above the CDPHE GPV from 4 feet to 6 feet bgs. Soil in the northeast excavation
area was excavated to a depth of approximately 6 feet. The total excavated volume of soil was
approximately 15 cubic yards. Confirmation soil samples were not collected based on the
analytical results from the RDC event.
Following soil removal and verification of impacted soil removal, the excavation was backfilled
with fill material from a documented source and compacted in-place.
4.8 Third Remedial Design Characterization
Based on the review of soil and groundwater analytical data from the second RDC investigation
(November 2014), Terracon recommended conducting a third RDC investigation. The purpose of
the third RDC investigation was to further assess the horizontal and vertical extents of the soil
and groundwater chlorinated solvent plumes. The secondary objective was to generate soil and
groundwater analytical data for the use in developing a revised BOS 100® injection work plan for
the remaining BOS 100® that was not injected in the source area in December 2014.
The third RDC event took place on December 22 and 23, 2014. During this event, an additional
five RDC soil borings were installed and temporary monitoring wells were placed by VGS, under
the supervision of Terracon. RDC locations during this event contained two soil borings and two
temporary wells, vertically staggered, for a total of 10 borings and 10 temporary wells. Soil
samples were collected every two feet from the ground surface to the 20 feet bgs. Soil and
groundwater samples were collected by VGS and analyzed for VOCs (EPA Method 8260B) by
RPI. More detailed information on the RDC event can be found in the VGS Injection Report in
Appendix F. Boring logs can be found in Appendix G.
Soil sample analytical results were below the CDPHE GPV. Soil sample analytical results are
summarized in Table 1. Concentrations of PCE, TCE, cis-1,2-DCE, and VC exceeded the
CGWQS in the groundwater sample collected from temporary well RDC-33. Groundwater
analytical results are summarized in Table 7.
4.9 Additional Monitoring Well Installation
Under the supervision of Terracon, six additional monitoring wells were installed by VGS on site
to provide key injection point performance monitoring data within, and downgradient of, the source
area. The table below summarizes the installation of the six monitoring wells.
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WELL ID DATE
INSTALLED
DRILLING
CONTRACTOR
DIRECTION PURPOSE
MW-4 12/22/14-
12/23/14 VGS Downgradient Injection performance and source
area plume migration assessment
MW-5 12/22/14-
12/23/14 VGS Downgradient Performance data on the permeable
reactive barrier wall injections
MW-6 1/29/15 Terracon Downgradient Performance data on the permeable
reactive barrier wall injections
MW-7 1/29/15 Terracon Crossgradient Performance data on the permeable
reactive barrier wall injections
MW-8 1/29/15 Terracon Source Area Source area injection performance
MW-9 1/29/15 Terracon Source Area Upgradient source area conditions
Monitoring wells were installed according to Colorado Water Well Construction Rule 14 (2 CCR
402-2). Construction permits, GWS-31, were filed with the Division of Water Resources on March
30, 2015. Monitoring wells were constructed with 10 feet of 0.01-inch slot of 2.0-inch diameter
polyvinyl chloride (PVC) well screen. A clean, 10-20 gradation silica sand filter pack was placed
from the bottom of the well to approximately one to two feet above the top of well screen, followed
by a hydrated bentonite chip annular seal to approximately 0.5 feet bgs. The monitoring wells
were fitted with J-plug well caps and bolt-down, flush-mounted well covers set in concrete. Soil
borings and monitoring well installation details can be found in Appendix G. Monitoring wells were
developed following installation by repeatedly surging the wells with a two-inch diameter PVC
surge block and purging the groundwater from the wells with a single-use PVC bailer.
On March 18, 2015, Terracon surveyed the monitoring well top of casings and related ground
surface elevations. Exhibit 3 depicts monitoring well locations including the additional monitoring
wells installed by Terracon.
Soil and groundwater samples were collected by Terracon and submitted to RPI for laboratory
analysis. RPI is not a NELAP-accredited laboratory; however, these samples were collected for
initial design and screening purposes and not used to obtain closure. The cis-1,2-DCE
concentration (1.55 mg/kg) in the soil sample collected from MW-4 from 4 feet bgs exceeded the
CDPHE GPV (0.261 mg/kg). Soil analytical results are summarized in Table 1. Concentrations of
various chlorinated solvents exceeded the CGWQS in groundwater samples collected from
monitoring wells MW-4, MW-5, MW-6, MW-8, and MW-9. Groundwater analytical results are
summarized Table 7.
Monitoring well MW-6 was destroyed during redevelopment activities in March 2018 and a
replacement well was installed (MW-6R) on October 5, 2018.
4.10 BOS 100® Injections – Round Two
VGS returned to the site on February 2, 2015, to complete BOS 100® injections at the PRB area
and the area between the source area and the PRB (Exhibit 4). Injections were completed with a
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Geoprobe® 7820 direct push drill rig. An additional 111 injections were completed for a total of
175 injection locations across the site. An additional 5,373 pounds of BOS 100® were injected
during this event for a total of 10,873 pounds injected at the site.
During the injection activities, injection flow rates and back pressures were monitored at the
injection pump. Injection back pressures ranged from approximately 0 pounds to 25 pounds per
square inch (psi), and average injectate flow rates were observed at approximately 10 gallons per
minute (gpm). Since positive back pressure was observed during most of the injection period,
VGS concluded that the pipe was full during the injection period and that injectate was distributed
along the length of the borehole.
After injections were complete, each injection point was abandoned with hydrated bentonite and
the surface was patched to match surrounding asphalt. The performance of the BOS 100®
injections was evaluated by periodically monitoring groundwater samples collected from the site.
Injection logs from VGS are included as Table 2. For further detail on the injection event, see VGS
Injection Report in Appendix F.
4.11 On-Going Groundwater Monitoring
Quarterly groundwater monitoring at select monitoring wells has occurred at this site since March
2015. Groundwater elevations are collected quarterly and summarized in Table 4. The
groundwater elevations from the most recent sampling event (December 2018) are illustrated on
Exhibit 6. The inferred groundwater flow direction is to the northeast, which has been consistent
throughout the project. The inferred groundwater flow contours are based on the March 2018
monitoring event when monitoring wells MW-1 through MW-9 were gauged.
During each quarterly sampling event, various groundwater quality parameters, including
temperature, specific conductance, dissolved oxygen, pH, and oxidation reduction potential were
measured at each sampled monitoring well and are summarized in Table 5.
Based on the December 2018 sampling event, monitoring wells MW-2, MW-4, MW-8 and MW-9
have concentrations of PCE exceeding the CDPHE-approved groundwater standard for the site
of 17 micrograms per liter (µg/L). From March 2015 to December 2018, an average reduction in
PCE concentrations of 70% has been observed in monitoring wells MW-01 through MW-09.
Concentrations of TCE exceed the CDPHE groundwater standard in monitoring well MW-4 and
MW-8. Concentrations of VC exceed the CDPHE groundwater standard in monitoring well
MW-6R. Groundwater analytical results are summarized Table 6. A PCE Isoconcentration Map
for the December 2018 sampling event is included as Exhibit 7. Laboratory reports from on-going
groundwater monitoring are included in Appendix H.
4.12 BOS-100® Performance Testing, Slug Testing, and Modeling
During Terracon’s April 2017 groundwater sampling event, split groundwater samples were
collected by RPI for additional analysis of VOCs (EPA Method 8260B), dissolved gases (RSK
175), and anions (300.1) to evaluate if BOS 100 was actively remediating the impacted
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groundwater. The results are summarized in Table 7. Methane and ethane, byproducts of PCE
degradation, were detected in monitoring well MW-4 indicating that remediation of PCE continues
to occur at this site.
On April 26, 2017, Terracon conducted two slug tests at monitoring wells MW-4, MW-6, and MW-
8 to evaluate the current subsurface hydraulic conductivity. The slug test results for monitoring
well MW-4 were inconsistent compared to the tests for the two other monitoring wells. Terracon
personnel determined that the inconsistently was likely related to the monitoring well installation
method. Direct push methods were used whereas the other wells were installed via hollow stem
auger methods. Thus, the data for monitoring well MW-4 were not used to calculate the hydraulic
conductivity for this site. A third slug test for monitoring well MW-6 was required due to the wind
blowing a foreign object in the twine holding the transducer in the monitoring well. This shifted the
transducer approximately half way through the test.
Terracon calculated the geometric mean of the data to estimate a hydraulic conductivity for the
site. The geometric mean was 7.71x10-4 centimeters per second (cm/sec). The assumed effective
porosity is 0.2 for the silty sand (Hydrogeology and Groundwater Modeling, Second Edition,
Neven Kresic, 2007). Combined with the hydraulic gradient of 0.0234 feet per foot (ft/ft)
(measured on April 5, 2017), the estimated seepage velocity is 93.36 feet per year (ft/yr). The
results of the slug test are summarized in Table 8 and supporting documentation is included in
Appendix I.
The results of the additional groundwater testing and slug testing conducted at the site were used
to model downgradient PCE concentrations in groundwater near the commercial building across
West 38th Avenue. The EPA’s BIOCHLOR fate and transport model was used to evaluate the fate
and transport of the groundwater plume in the absence of a source, since the source area soils had
been previously remediated, and to evaluate whether monitored natural attenuation (MNA) would
reduce off-site groundwater impacts to the north in a reasonable time period or if additional
remediation was required. The model indicated that by 2131, PCE concentrations at off-site
monitoring well MW-2 will be less than the CGWQS of 17 µg/L. The model predicted that PCE
groundwater concentrations in the source area (MW-4) would be below the cleanup objective by
2150. Based on the results of the model, additional groundwater remediation was recommended.
The inputs and outputs of the modeling and supporting documentation is included in Appendix J.
4.13 E-Redox Pilot Test
A 4-month E-Redox™ pilot test was conducted by Terracon, in the source area of the PCE
groundwater plume, from November 2, 2017 to March 29, 2018. The E-Redox™ technology,
patented by Advanced Environmental Technologies (AET), generates a low-voltage gradient
electric field using a cathode and anode rod placed into the groundwater 25 feet from the affected
monitoring well. The rods are placed at the same depth where impacts to groundwater is present.
The units can be powered using a regular household power outlet. The electric field induces redox
reactions in the subsurface to degrade chlorinated solvents. The technology also changes the
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electrical properties of the soil particles to release the chlorinated solvents that are sorbed
(attached) to the soil back into the groundwater for easier degradation.
The E-Redox™ pilot study consisted of two anodes and two cathodes placed around monitoring
well MW-4 (Exhibit 8). The anode and cathode rods were installed after four 1-inch piezometers
were installed via direct push drilling methods to a depth of 20 feet below ground surface (bgs)
and screened from 10 feet to 20 feet bgs. The pilot study remediation system was turned off until
full-scale remediation activities begin to evaluate potential rebounding of groundwater
concentrations, although rebounding is not expected with this remediation technology.
Effectiveness monitoring was conducted during the four-month pilot study. Groundwater was
monitored in select monitoring wells as summarized in the table below:
SAMPLING
EVENT
TIMEFRAME
AFTER START-
UP
MONITORING WELLS
SAMPLED
ANALYTES TESTED ANALYTICAL
METHODS
One Week MW-1 through MW-7 PCE, TCE, DCE, VC EPA Method 8260B
MW-1 through MW-7 Ethane, ethene, acetylene RSK175
Two Weeks MW-1 through MW-7 PCE, TCE, DCE, VC EPA Method 8260B
MW-1 through MW-7 Ethane, ethene, acetylene RSK175
One Month MW-1 through MW-7 PCE, TCE, DCE, VC EPA Method 8260B
MW-4 and MW-5 Ethane, ethene, acetylene RSK175
Two Months MW-1 through MW-7 PCE, TCE, DCE, VC EPA Method 8260B
MW-4 and MW-5 Ethane, ethene, acetylene RSK175
Three Months MW-1 through MW-7 PCE, TCE, DCE, VC EPA Method 8260B
MW-4 and MW-5 Ethane, ethene, acetylene RSK175
Four Months MW-1 through MW-9 PCE, TCE, DCE, VC EPA Method 8260B
MW-4 and MW-5 Ethane, ethene, acetylene RSK175
An approximate 35% reduction in PCE concentrations was observed at monitoring well MW-4
during the four-month period. Concentrations of ethane (the final byproduct of PCE degradation)
were observed. It is important that PCE degrades to the final byproduct, ethene or ethane,
because other interim byproducts (e.g. vinyl chloride) are more hazardous to human health than
PCE.
Mass balance calculations, prepared by AET, for chlorinated solvents in monitoring well MW-4
resulted in an excess in reduction of chlorinated solvents compared to the groundwater
concentrations in this monitoring well. This calculation implies that the E-Redox™ system treated
additional chlorinated solvents that were sorbed to the soil and not dissolved in the groundwater.
Analytical results are summarized in Table 6.
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4.14 Additional Site Investigation
On June 23, 2018, Terracon installed three temporary monitoring wells (Temp-1, Temp-2, and
Temp-3), west of monitoring well MW-9, to further assess potential subsurface soil and
groundwater impacts. The monitoring well locations are shown on Exhibit 9. This additional
investigation was conducted to evaluate the final placement of cathodes and anodes for the full-
scale E-Redox™ implementation and assess if substantial soil and groundwater impacts were
present west of monitoring well MW-9. PCE concentrations in this monitoring well fluctuate
seasonally.
The temporary monitoring wells were advanced to an approximate depth of 20 feet bgs. A
qualified well driller with field oversight from a Terracon environmental scientist performed these
environmental drilling services. Soil samples were collected utilizing a direct-push drilling rig to
document lithology, color, and for laboratory analysis. Soil samples were field screened using
sensory methods and a PID equipped with a 10.6 electron volt ultraviolet lamp source to evaluate
for the presence of potential volatile organic compound vapors. One soil sample was collected
from each soil boring, based on PID readings and visual observations, for laboratory analysis of
PCE, TCE, DCE, and VC via EPA Method 8260B. A grab groundwater sample was collected from
each temporary piezometer for laboratory analysis of PCE, TCE, DCE, and VC via EPA Method
8260B.
Soil and groundwater samples were submitted to Pace Analytical Services, LLC., a National
Environmental Laboratory Accreditation Program (NELAP) accredited laboratory, for analysis
following standard chain-of-custody procedures. Samples were handled and processed by
personnel wearing clean nitrile gloves. Sampling equipment were cleaned prior to project
commencement and before beginning each sampling location. Non-dedicated sampling
equipment was cleaned using an Alconox® detergent wash and potable water rinse prior to
commencement of the project and between the collection of each sample.
Detections in soil were limited to PCE, which was detected in the soil sample collected from
temporary monitoring well Temp-2 at a concentration of 0.00457 mg/kg; however, the detection
is below the EPA Residential and Industrial RSLs and the CDPHE GPV. Soil analytical results
are summarized in Table 3.
Detections in groundwater were limited to PCE, which was detected in groundwater samples
collected from temporary monitoring wells Temp-1 (7.6 µg/L) and Temp-3 (3.22 µg/L). However,
the detections were below the CGWQS of 17 µg/L. Groundwater analytical results are
summarized in Table 6.
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5.0 APPLICABLE STANDARDS/RISK DETERMINATION
The following standards were used for risk determination at the site:
◼ The EPA Residential and Industrial RSLs [November 2018: Target Cancer Risk
(TR) of 1E-6, Hazard Quotient (HQ) or 1.0];
◼ The CDPHE Water Quality Control Commission published Basic Standards for
Groundwater, for groundwater standards (December 30, 2016), also referred to as
the CGWQS in this document;
◼ The CDPHE Groundwater Protection Values (March 2014);
◼ Residential Remediation Goal and Action Level guidance, CDPHE Air Screening
Concentrations Table (January 2016);
◼ EPA Office of Land and Emergency Management (OLEM) Vapor Intrusion
Assessment Vapor Intrusion Screening Level (VISL) Calculator; and
◼ CDPHE Regulation No. 8, Part B, 5 CCR 1001-10, Part B (January 2008).
After implementation of the remediation plan described below, potential risks to human health or
environment on-site are anticipated to be low. The general risk factors are discussed in more
detail in the following sections.
5.1 Exposure Pathways and Mitigation
Terracon conducted an exposure pathway evaluation and receptor survey for this Application.
Currently, the Groundwater Ingestion and Groundwater Vapor Inhalation exposure pathways are
present at the site during construction and the Groundwater Vapor Inhalation exposure pathway
is present during post-construction. The site is currently vacant with a gravel parking surface.
The proposed construction will consist of concrete slabs, above-grade parking, and landscaped
areas which should prevent the completion of an exposure pathway to potentially environmentally-
impacted groundwater. Impacts to soil have been previously remediated.
Because groundwater will not be used at the site, ingestion of impacted groundwater is not an
exposure pathway post-construction. However, this pathway may be complete during installation
of utilities and drilling of piers.
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EXPOSURE PATHWAY SOIL GROUND
WATER
SURFACE
WATER SEDIMENT
Soil – Dermal Contact (Soil Derm) NC
NA
NA NA
Soil – Ingestion (Soil Ing) NC
Soil – Vapor Inhalation (Soil Inh) NC
Soil – Leach to Groundwater (GW Soil) NC
Groundwater – Ingestion (GW Ing)
NA
C
Groundwater – Vapor Inhalation (GW Inh) C
Groundwater – Migration to Surface
Water (SW GW)
NC
Surface Water – Dermal Contact (SW
Derm)
NA Surface Water – Ingestion (SW Ing)
Sediment – Dermal Contact (Sed Derm)
Sediment – Ingestion (Sed Ing)
Notes:
NA – Exposure pathway not applicable to the media
NC – Not anticipated to be complete
C – Exposure pathway complete
The following table summarizes the environmentally-impacted media on- and off-site, based on
Terracon’s assessment activities and results.
ENVIRONMENTAL
MEDIA
ACTION LEVELS EXCEEDED?
TYPES OF
IMPACTS
ON-SITE OFF-SITE
Yes No Not
Sampled Yes No Not
Sampled
Soil X X
Chlorinated
solvents present in
soil previously
excavated
Groundwater X X 1,2-DCE, VC, PCE,
TCE
Soil Vapor X X
Surface Water X X
Sediment X X
5.1.1 Soil Pathways
Exposure pathways for dermal contact, inhalation, and ingestion of soils is not considered
complete at the site as impacted subsurface soil was previously excavated and removed. The soil
contaminant leaching to the groundwater pathway is not considered completed at the site based
on the soil analytical results. The soil contaminant migrating to surface water pathway is not
considered complete due to the lack of surface water at the site.
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Stormwater structures at the site will not be earthen and will consist of asphalt, concrete,
fiberglass, etc. materials.
5.1.2 Groundwater Vapor Pathways
Based on the groundwater analytical results and the existing and proposed site development, the
inhalation of volatile compounds in groundwater pathway is considered to be complete during
construction and post-construction. The VOC detections in the groundwater samples were
evaluated using the US EPA Vapor Intrusion Screening Level (VISL) Calculator to assess risk
associated with potential vapor intrusion related to the groundwater VOC concentrations.
According to the CDPHE Hazardous Materials and Waste Management Division Air Screening
Concentrations Table, January 2016, the target vapor intrusion exposure risk for individual
carcinogens is 1x10-6, while the target cumulative risk for carcinogens is 1x10-5. The target hazard
quotient (THQ) for non-carcinogens is 1. VOC concentrations in the groundwater represent a
potential vapor intrusion concern for commercial property use. The VISL results are provided in
Table 9.
Reference to the OSWER Guidance and VISL Calculator is not meant to imply that Terracon
conducted a detailed subsurface characterization and vapor intrusion risk assessment per the
OSWER Technical Guide for Assessing and Mitigating the Gas Intrusion Pathway from
Subsurface Gas Sources to Indoor Air (OSWER Guidance, June 2015).
Groundwater Controls related to potential exposure to vapor emanating from impacted
groundwater during construction activities are to be included in Health and Safety Plans prepared
for workers at the site. A passive vapor mitigation system (VMS) will be designed, if necessary
depending on groundwater concentrations at the time of redevelopment. The passive VMS, in
needed, will be installed during construction activities to protect future tenants (see Section 7.2).
5.1.3 Groundwater Ingestion Pathways
Groundwater may be encountered during installation of utilities at the site, particularly the
installation of pipe bedding. Dewatering is not expected to be required to install pipe bedding. The
methods to identify, characterize, manage, and dispose of impacted groundwater are described
in more detail in the Materials Management Plan (MMP), which is included as Appendix K.
Existing water wells (not abandoned) within 2,640 feet (0.5 miles) of the site, registered with the
Colorado Division of Water Resources, are listed in Table 10 and their locations are displayed in
Exhibit 10. The use of each well is indicated in Table 10 in the “Type” column. A majority of the
wells are monitoring wells and upgradient or crossgradient water wells. The table below
summarizes location information for non-monitoring wells that are downgradient from the site:
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RECEIPT NUMBER WELL TYPE DISTANCE FROM SITE
(ALL DOWNGRADIENT)
9026971 Irrigation 0.25 miles northeast
9034656 Domestic 0.29 miles northeast
9032359 Domestic 0.38 miles northeast
9030332 Domestic 0.44 miles northeast
3648237 Irrigation 0.44 miles northeast
9027003 Domestic 0.40 miles northeast
9033400 Domestic 0.41 miles northeast
9025419 Domestic 0.44 miles northeast
The off-site exposure pathway for groundwater in downgradient water wells used for non-
monitoring well purposes is not considered complete based on the following:
◼ The distance of downgradient water wells from the site,
◼ Modeling results,
◼ Site contaminants of concern not being detected in the downgradient monitoring
wells (MW-1 and MW-3), and
◼ Decreasing concentrations of PCE in downgradient monitoring well MW-2.
Groundwater contamination migrating to surface water pathway is not considered to be complete
due to the lack of surface water at the site.
6.0 REMEDIAL ACTION PLAN
The proposed RAP for the site considers additional remedial actions then original proposed,
based on additional investigations. The goal of the original and additional remedial actions is to
mitigate and reduce short-term and long-term exposures to site contaminants. The conceptual
RAP selected for this site is summarized below. A deed restriction or environmental covenant
may be instituted for the property to establish ongoing controls.
6.1 Full-Scale Remediation of Groundwater
The design of the full-scale E-Redox™ system and network is based on the data obtained from
the pilot test and layout designs from other sites where E-Redox™ systems have been installed
and operated. Electrode polarities and their electrical influence in the surrounding area are key to
the operation of the E-Redox™ systems to achieve contaminant destruction and contaminant
diffusion/desorption. The proposed layout of the E-Redox™ electrodes is shown on Exhibit 11. A
total of 21 electrodes will be required; therefore, 17 new electrodes will need to be installed in
addition to the four existing electrodes used for the pilot test. The electrodes will be divided into
five sets that are connected to a respective direct current (DC) power supply. A total of five DC
power supplies will require a shelter with electrical outlets to access electrical power. The
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remediation area will be protected with temporary fencing. The electrical wires will be trenched
approximately two feet bgs and placed in protective conduits.
The proposed work scope is scheduled to last for 12 months upon implementation of the E-
Redox™ system. This project period may be adjusted based on evaluation of performance
monitoring data as discussed below.
Six groundwater monitoring wells (MW-2, MW-4, MW-5, MW-6R, MW-8, and MW-9) will be
sampled two weeks and then monthly for 12 months following the startup of the E-Redox™
remediation system. Monitoring wells MW-1, MW-3, and MW-7 will be sampled annually in March.
This may be adjusted based on groundwater sample laboratory analytical results. The
groundwater samples will be analyzed for PCE, TCE, DCE, and VC via EPA Method 8260B (MW-
1 through MW-9) and acetylene, ethene, and ethane via RSK175 (MW-4, MW-5, MW-6R, MW-8,
and MW-9 only). One trip blank and one field duplicate will be collected per event for quality
assurance and quality control.
6.2 Vapor Mitigation System
Depending on the timing of redevelopment and current concentrations of chlorinated solvents in
the groundwater, installation of a passive VMS may be required at the site. If required, a site-
specific passive VMS will be designed and installed underneath the proposed commercial
building. At the time of redevelopment, Terracon will assess the need for a passive VMS based
on current groundwater concentrations using the EPA Office of Land and Emergency
Management (OLEM) Vapor Intrusion Assessment Vapor Intrusion Screening Level (VISL)
Calculator. A detailed subsurface characterization and vapor intrusion risk assessment per the
Office of Solid Waste and Emergency Response (OSWER) Technical Guide for Assessing and
Mitigating the Gas Intrusion Pathway from Subsurface Gas Sources to Indoor Air (OSWER
Guidance, June 2015) is not planned.
The maximum concentration for each detected VOC will be entered into the VISL Calculator. The
THQ will be adjusted to 1, and the groundwater temperature will be adjusted to 19°C, based on
site-specific groundwater temperature measured in the field. Other inputs will be retained as the
default values.
According to the CDPHE Hazardous Materials and Waste Management Division Air Screening
Concentrations Table, January 2016, the target vapor intrusion exposure risk for individual
carcinogens is 1x10-6, while the target cumulative risk for carcinogens is 1x10-5. The target hazard
quotient (THQ) for non-carcinogens is 1. If the predicted individual vapor intrusion exposure risk
associated with the PCE and its daughter products in groundwater concentrations exceeds the
CDPHE allowable risk, a passive VMS will be designed and implemented for the proposed on-
site building during redevelopment.
The VMS, if necessary, will include placement of a vapor collection zone with vapor extraction
vents and extraction risers routed to the roof. A traditional spray-on liner or Cupolex® system may
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be used. Terracon will provide oversight of the VMS installation activities to evaluate whether the
VMS has been installed per the manufacturer’s specifications. If a VMS system is required, a NAD
will be submitted to CDPHE for approval once the system has been determined to be operating
effectively. If a VMS is not required, a NAD will be submitted to CDPHE for approval after four
quarters of groundwater sampling with results below the CGWQS has been achieved. A NAD
may also be submitted after off-site groundwater concentrations are below the CGWQS; however,
a deed restriction would be required to prohibit groundwater use at the site.
7.0 PARTIAL NAD REQUEST
The original VCP Application includes Parcel IDs 39-262-01-001 and 39-262-01-002. Terracon
requests a NAD for Parcel ID 39-262-01-002, which is located on the southernmost portion of the
property. Environmental impacts to the subsurface soil and groundwater were not observed
during previous investigations, EPI’s 2013 investigation (Appendix B) and the VGS RDC
(Appendix F). In addition, the property to the south (upgradient of the site) has been an apartment
complex since the 1950s and was not identified as a REC.
EXHIBITS
TOPOGRAPHIC MAP IMAGE COURTESY OF THE U.S. GEOLOGICAL SURVEY
QUADRANGLES INCLUDE: ARVADA, CO (1/1/1994) and FORT LOGAN, CO (1/1/1994).
TOPOGRAPHIC MAP
WHEAT RIDGE BROWNFIELD
7690 WEST 38TH AVENUE
WHEAT RIDGE, COLORADO
10625 W I 70 Frontage Rd N Ste 3
Wheat Ridge, CO 80033-1729
DIAGRAM IS FOR GENERAL LOCATION ONLY, AND IS NOTINTENDED FOR CONSTRUCTION PURPOSES
25147073
CPD
HNO
MEW
AS SHOWN
EX.1
06.21.2017
Scale:
1
EXHIBITProject Manager:
Drawn by:
Checked by:
Approved by:
Project No.
File Name:
Date:
HNO
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TABLES
Table 1
Summary of RDC Soil Analytical Results
Wheat Ridge Brownfield Remediation
7690 West 38th Avenue
Wheat Ridge, Colorado
Terracon Project Number 25147073
Sample ID. No.RDC-1 RDC-1 RDC-1 RDC-1 RDC-1 RDC-1 RDC-1 RDC-1 RDC-1 RDC-1 RDC-1
Date Sampled 11/3/2014 11/3/2014 11/3/2014 11/3/2014 11/3/2014 11/3/2014 11/3/2014 11/3/2014 11/3/2014 11/3/2014 11/3/2014
Sample Depth 4-6' 6-8' 8-10' 10-12' 12-14' 14-16' 16-18' 18-20' 20-22' 22-24' 24-25'
Units ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg
Propene NE NE NE ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
2-Methylpropene NE NE NE ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)
Vinyl Chloride 5.9 1700 110 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1-Dichloroethene 230000 1,000,000 12000 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
trans-Dicholorethene NE NE NE ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1-Dichloroethane 3600 16000 1800 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
cis-Dichloroethene 160000 2,300,000 261 0.75 (0.5)1.83 (0.5)3.99 (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
Chloroform 320 1400 85 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1,1-Trichloroethane 8,100,000 36,000,000 62000 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,2-Dichloroethane 460 2000 3.6 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
Trichloroethene 940 6000 680 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1,2-Trichloroethane 1100 5000 38 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
Tetracholorethene 24000 100000 1900 1.11 (0.5)ND (0.5)2.52 (0.5)7.13 (0.5)5.15 (0.5)0.91 (0.5)5.68 (0.5)1.01 (0.5)1.14 (0.5)1.30 (0.5)ND (0.5)
Sample ID. No.RDC-2 RDC-2 RDC-2 RDC-2 RDC-2 RDC-2 RDC-2 RDC-2 RDC-2 RDC-2 RDC-2
Date Sampled 11/3/2014 11/3/2014 11/3/2014 11/3/2014 11/3/2014 11/3/2014 11/3/2014 11/3/2014 11/3/2014 11/3/2014 11/3/2014
Sample Depth 4-6'6-8'8-10'10-12'12-14'14-16'16-18'18-20'20-22'22-24'24-26'
Units ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg
Propene NE NE NE ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
2-Methylpropene NE NE NE ND (2.0)ND (2.0)2.25 (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)
Vinyl Chloride 5.9 1700 110 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1-Dichloroethene 230000 1,000,000 12000 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
trans-Dicholorethene NE NE NE ND (0.5)ND (0.5)0.86 (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1-Dichloroethane 3600 16000 1800 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
cis-Dichloroethene 160000 2,300,000 261 21.2 (0.5)11.9 (0.5)28.0 (0.5)1.26 (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
Chloroform 320 1400 85 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1,1-Trichloroethane 8,100,000 36,000,000 62000 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,2-Dichloroethane 460 2000 3.6 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
Trichloroethene 940 6000 680 ND (0.5)1.16 (0.5)1.46 (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1,2-Trichloroethane 1100 5000 38 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
Tetracholorethene 24000 100000 1900 8.65 (0.5)4.67 (0.5)7.26 (0.5)12.3 (0.5)5.47 (0.5)2.78 (0.5)1.44 (0.5)0.91 (0.5)ND (0.5)ND (0.5)1.60 (0.5)
CDPHE
GPV
Residential
RSL Industrial RSL
Residential
RSL Industrial RSL CDPHE
GPV
25147073 Tables: Table 1-Soil Page 1 of 14
2/1/2019
Table 1
Summary of RDC Soil Analytical Results
Wheat Ridge Brownfield Remediation
7690 West 38th Avenue
Wheat Ridge, Colorado
Terracon Project Number 25147073
Sample ID. No.RDC-2 RDC-2 RDC-3 RDC-3 RDC-3 RDC-3 RDC-3 RDC-3 RDC-3 RDC-3 RDC-4
Date Sampled 11/3/2014 11/3/2014 11/3/2014 11/3/2014 11/3/2014 11/3/2014 11/3/2014 11/3/2014 11/3/2014 11/3/2014 11/3/2014
Sample Depth 26-28'28-30'4-6'6-8'8-10'10-12'12-14'14-16'16-18'18-20'4-6'
Units ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg
Propene NE NE NE ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
2-Methylpropene NE NE NE ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)
Vinyl Chloride 5.9 1700 110 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1-Dichloroethene 230000 1,000,000 12000 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
trans-Dicholorethene NE NE NE ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1-Dichloroethane 3600 16000 1800 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
cis-Dichloroethene 160000 2,300,000 261 ND (0.5)ND (0.5)17.6 (0.5)2.61 (0.5)22.1 (0.5)12.1 (0.5)11.2 (0.5)1.76 (0.5)ND (0.5)ND (0.5)ND (0.5)
Chloroform 320 1400 85 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1,1-Trichloroethane 8,100,000 36,000,000 62000 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,2-Dichloroethane 460 2000 3.6 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
Trichloroethene 940 6000 680 ND (0.5)ND (0.5)5.23 (0.5)ND (0.5)10.4 (0.5)2.19 (0.5)1.87 (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1,2-Trichloroethane 1100 5000 38 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
Tetracholorethene 24000 100000 1900 0.78 (0.5)ND (0.5)63.5 (0.5)26.9 (0.5)212 (0.5)147 (0.5)148 (0.5)25.2 (0.5)0.85 (0.5)19.7 (0.5)17.5 (0.5)
Sample ID. No.RDC-4 RDC-4 RDC-4 RDC-4 RDC-4 RDC-4 RDC-4 RDC-5 RDC-5 RDC-5 RDC-5
Date Sampled 11/3/2014 11/3/2014 11/3/2014 11/3/2014 11/3/2014 11/3/2014 11/3/2014 11/3/2014 11/3/2014 11/3/2014 11/3/2014
Sample Depth 6-8'8-10'10-12'12-14'14-16'16-18'18-20'4-6'6-8'8-10'10-12'
Units ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg
Propene NE NE NE ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
2-Methylpropene NE NE NE ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)2.34 (2.0)2.21 (0.5)ND (2.0)2.01 (2.0)
Vinyl Chloride 5.9 1700 110 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1-Dichloroethene 230000 1,000,000 12000 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
trans-Dicholorethene NE NE NE ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)2.18 (0.5)2.75 (0.5)1.22 (0.5)2.46 (0.5)
1,1-Dichloroethane 3600 16000 1800 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
cis-Dichloroethene 160000 2,300,000 261 1.18 (0.5)ND (0.5)ND (0.5)ND (0.5)1.87 (0.5)ND (0.5)ND (0.5)68.4 (0.5)128 (0.5)112 (0.5)57.7 (0.5)
Chloroform 320 1400 85 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1,1-Trichloroethane 8,100,000 36,000,000 62000 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,2-Dichloroethane 460 2000 3.6 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
Trichloroethene 940 6000 680 1.02 (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)2.63 (0.5)12.4 (0.5)
1,1,2-Trichloroethane 1100 5000 38 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
Tetracholorethene 24000 100000 1900 83.1 (0.5)3.63 (0.5)55.4 (0.5)1.26 (0.5)16.9 (0.5)8.00 (0.5)1.37 (0.5)2.61 (0.5)2.88 (0.5)37.2 (0.5)648E (0.5)
Residential
RSL Industrial RSL CDPHE
GPV
Residential
RSL Industrial RSL CDPHE
GPV
25147073 Tables: Table 1-Soil Page 2 of 14
2/1/2019
Table 1
Summary of RDC Soil Analytical Results
Wheat Ridge Brownfield Remediation
7690 West 38th Avenue
Wheat Ridge, Colorado
Terracon Project Number 25147073
Sample ID. No.RDC-5 RDC-5 RDC-5 RDC-5 RDC-6 RDC-6 RDC-6 RDC-6 RDC-6 RDC-6 RDC-6
Date Sampled 11/3/2014 11/3/2014 11/3/2014 11/3/2014 11/3/2014 11/3/2014 11/3/2014 11/3/2014 11/3/2014 11/3/2014 11/3/2014
Sample Depth 12-14'14-16'16-18'18-20'4-6'6-8'8-10'10-12'12-14'14-16'16-18'
Units ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg
Propene NE NE NE ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
2-Methylpropene NE NE NE ND (2.0)ND (2.0)ND (2.0)2.07 (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)
Vinyl Chloride 5.9 1700 110 ND (0.5)ND (0.5)ND (0.5)ND (0.5)2.17 (0.5)ND (0.5)3.82 (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1-Dichloroethene 230000 1,000,000 12000 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
trans-Dicholorethene NE NE NE ND (0.5)ND (0.5)ND (0.5)ND (0.5)1.31 (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1-Dichloroethane 3600 16000 1800 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
cis-Dichloroethene 160000 2,300,000 261 1.46 (0.5)ND (0.5)ND (0.5)ND (0.5)47.2 (0.5)9.22 (0.5)38.5 (0.5)14.9 (0.5)7.01 (0.5)ND (0.5)1.29 (0.5)
Chloroform 320 1400 85 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1,1-Trichloroethane 8,100,000 36,000,000 62000 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,2-Dichloroethane 460 2000 3.6 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
Trichloroethene 940 6000 680 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)1.33 (0.5)4.48 (0.5)2.27 (0.5)ND (0.5)ND (0.5)
1,1,2-Trichloroethane 1100 5000 38 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
Tetracholorethene 24000 100000 1900 79.0 (0.5)24.1 (0.5)5.92 (0.5)16.8 (0.5)2.71 (0.5)1.83 (0.5)21.5 (0.5)187 (0.5)165 (0.5)15.1 (0.5)15.3 (0.5)
Sample ID. No.RDC-6 RDC-7 RDC-7 RDC-7 RDC-7 RDC-7 RDC-7 RDC-7 RDC-7 RDC-8 RDC-8
Date Sampled 11/3/2014 11/4/2014 11/4/2014 11/4/2014 11/4/2014 11/4/2014 11/4/2014 11/4/2014 11/4/2014 11/4/2014 11/4/2014
Sample Depth 18-20'4-6'6-8'8-10'10-12'12-14'14-16'16-18'18-20'4-6'6-8'
Units ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg
Propene NE NE NE ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
2-Methylpropene NE NE NE ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)
Vinyl Chloride 5.9 1700 110 ND (0.5)31.4 (0.5)5.21 (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1-Dichloroethene 230000 1,000,000 12000 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
trans-Dicholorethene NE NE NE ND (0.5)4.87 (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1-Dichloroethane 3600 16000 1800 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
cis-Dichloroethene 160000 2,300,000 261 ND (0.5)25.3 (0.5)19.8 (0.5)1.92 (0.5)1.25 (0.5)0.74 (0.5)ND (0.5)ND (0.5)ND (0.5)3.98 (0.5)ND (0.5)
Chloroform 320 1400 85 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1,1-Trichloroethane 8,100,000 36,000,000 62000 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,2-Dichloroethane 460 2000 3.6 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
Trichloroethene 940 6000 680 ND (0.5)ND (0.5)1.75 (0.5)ND (0.5)0.97 (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)29.0 (0.5)1.72 (0.5)
1,1,2-Trichloroethane 1100 5000 38 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
Tetracholorethene 24000 100000 1900 4.49 (0.5)4.39 (0.5)20.2 (0.5)9.45 (0.5)37.4 (0.5)26.5 (0.5)3.91 (0.5)3.13 (0.5)10.4 (0.5)6640 (10)177 (0.5)
Residential
RSL Industrial RSL CDPHE
GPV
Residential
RSL Industrial RSL CDPHE
GPV
25147073 Tables: Table 1-Soil Page 3 of 14
2/1/2019
Table 1
Summary of RDC Soil Analytical Results
Wheat Ridge Brownfield Remediation
7690 West 38th Avenue
Wheat Ridge, Colorado
Terracon Project Number 25147073
Sample ID. No.RDC-8 RDC-8 RDC-8 RDC-8 RDC-8 RDC-8 RDC-9 RDC-9 RDC-9 RDC-9 RDC-9
Date Sampled 11/4/2014 11/4/2014 11/4/2014 11/4/2014 11/4/2014 11/4/2014 11/4/2014 11/4/2014 11/4/2014 11/4/2014 11/4/2014
Sample Depth 8-10'10-12'12-14'14-16'16-18'18-20'4-6'8-10'10-12'12-14'14-16'
Units ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg
Propene NE NE NE ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
2-Methylpropene NE NE NE ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)
Vinyl Chloride 5.9 1700 110 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1-Dichloroethene 230000 1,000,000 12000 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
trans-Dicholorethene NE NE NE ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1-Dichloroethane 3600 16000 1800 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
cis-Dichloroethene 160000 2,300,000 261 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
Chloroform 320 1400 85 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1,1-Trichloroethane 8,100,000 36,000,000 62000 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,2-Dichloroethane 460 2000 3.6 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
Trichloroethene 940 6000 680 1.60 (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1,2-Trichloroethane 1100 5000 38 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
Tetracholorethene 24000 100000 1900 196 (0.5)28.3 (0.5)4.93 (0.5)2.03 (0.5)0.72 (0.5)ND (0.5)87.3 (0.5)77.8 (0.5)2.22 (0.5)5.45 (0.5)2.00 (0.5)
Sample ID. No.RDC-9 RDC-9 RDC-10 RDC-10 RDC-10 RDC-10 RDC-10 RDC-10 RDC-10 RDC-10 RDC-11
Date Sampled 11/4/2014 11/4/2014 11/4/2014 11/4/2014 11/4/2014 11/4/2014 11/4/2014 11/4/2014 11/4/2014 11/4/2014 11/4/2014
Sample Depth 16-18'18-20'4-6'6-8'8-10'10-12'12-14'14-16'16-18'18-20'4-6'
Units ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg
Propene NE NE NE ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
2-Methylpropene NE NE NE ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)
Vinyl Chloride 5.9 1700 110 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1-Dichloroethene 230000 1,000,000 12000 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
trans-Dicholorethene NE NE NE ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1-Dichloroethane 3600 16000 1800 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
cis-Dichloroethene 160000 2,300,000 261 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)8.70 (0.5)1.81 (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
Chloroform 320 1400 85 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1,1-Trichloroethane 8,100,000 36,000,000 62000 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,2-Dichloroethane 460 2000 3.6 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
Trichloroethene 940 6000 680 ND (0.5)ND (0.5)22.5 (0.5)ND (0.5)ND (0.5)4.55 (0.5)0.84 (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1,2-Trichloroethane 1100 5000 38 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
Tetracholorethene 24000 100000 1900 1.83 (0.5)1.66 (0.5)410 (0.5)20.8 (0.5)20.0 (0.5)661E (0.5)275 (0.5)61.0 (0.5)25.9 (0.5)18.5 (0.5)96.5 (0.5)
Residential
RSL Industrial RSL CDPHE
GPV
Residential
RSL Industrial RSL CDPHE
GPV
25147073 Tables: Table 1-Soil Page 4 of 14
2/1/2019
Table 1
Summary of RDC Soil Analytical Results
Wheat Ridge Brownfield Remediation
7690 West 38th Avenue
Wheat Ridge, Colorado
Terracon Project Number 25147073
Sample ID. No.RDC-11 RDC-11 RDC-11 RDC-11 RDC-11 RDC-11 RDC-11 RDC-12 RDC-12 RDC-12 RDC-12
Date Sampled 11/4/2014 11/4/2014 11/4/2014 11/4/2014 11/4/2014 11/4/2014 11/4/2014 11/4/2014 11/4/2014 11/4/2014 11/4/2014
Sample Depth 6-8'8-10'10-12'12-14'14-16'16-18'18-20'4-6'6-8'8-10'10-12'
Units ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg
Propene NE NE NE ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
2-Methylpropene NE NE NE ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)
Vinyl Chloride 5.9 1700 110 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1-Dichloroethene 230000 1,000,000 12000 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
trans-Dicholorethene NE NE NE ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1-Dichloroethane 3600 16000 1800 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
cis-Dichloroethene 160000 2,300,000 261 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
Chloroform 320 1400 85 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)0.63 (0.5)
1,1,1-Trichloroethane 8,100,000 36,000,000 62000 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,2-Dichloroethane 460 2000 3.6 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
Trichloroethene 940 6000 680 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)0.84 (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1,2-Trichloroethane 1100 5000 38 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
Tetracholorethene 24000 100000 1900 24.9 (0.5)125 (0.5)41.9 (0.5)28.2 (0.5)23.4 (0.5)2.97 (0.5)1.82 (0.5)311 (0.5)28.7 (0.5)27.4 (0.5)18.7 (0.5)
Sample ID. No.RDC-12 RDC-12 RDC-12 RDC-12 RDC-13 RDC-13 RDC-13 RDC-13 RDC-13 RDC-13 RDC-13
Date Sampled 11/4/2014 11/4/2014 11/4/2014 11/4/2014 11/4/2014 11/4/2014 11/4/2014 11/4/2014 11/4/2014 11/4/2014 11/4/2014
Sample Depth 12-14'14-16'16-18'18-20'4-6'6-8'8-10'10-12'12-14'14-16'16-18'
Units ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg
Propene NE NE NE ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
2-Methylpropene NE NE NE ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)
Vinyl Chloride 5.9 1700 110 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1-Dichloroethene 230000 1,000,000 12000 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
trans-Dicholorethene NE NE NE ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1-Dichloroethane 3600 16000 1800 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
cis-Dichloroethene 160000 2,300,000 261 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)1.21 (0.5)
Chloroform 320 1400 85 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1,1-Trichloroethane 8,100,000 36,000,000 62000 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,2-Dichloroethane 460 2000 3.6 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
Trichloroethene 940 6000 680 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1,2-Trichloroethane 1100 5000 38 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
Tetracholorethene 24000 100000 1900 8.98 (0.5)1.31 (0.5)1.08 (0.5)2.42 (0.5)75.1 (0.5)92.3 (0.5)32.1 (0.5)29.4 (0.5)38.2 (0.5)44.8 (0.5)16.7 (0.5)
Residential
RSL Industrial RSL CDPHE
GPV
Residential
RSL Industrial RSL CDPHE
GPV
25147073 Tables: Table 1-Soil Page 5 of 14
2/1/2019
Table 1
Summary of RDC Soil Analytical Results
Wheat Ridge Brownfield Remediation
7690 West 38th Avenue
Wheat Ridge, Colorado
Terracon Project Number 25147073
Sample ID. No.RDC-13 RDC-14 RDC-14 RDC-14 RDC-14 RDC-14 RDC-14 RDC-14 RDC-14 RDC-15 RDC-15
Date Sampled 11/4/2014 11/4/2014 11/4/2014 11/4/2014 11/4/2014 11/4/2014 11/4/2014 11/4/2014 11/4/2014 11/4/2014 11/4/2014
Sample Depth 18-20'4-6'6-8'8-10'10-12'12-14'14-16'16-18'18-20'4-6'6-8'
Units ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg
Propene NE NE NE ND (0.5)ND (500)ND (500)ND (500)ND (500)ND (10)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
2-Methylpropene NE NE NE ND (2.0)ND (2000)ND (2000)ND (2000)ND (2000)ND (40)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)
Vinyl Chloride 5.9 1700 110 ND (0.5)ND (500)ND (500)ND (500)ND (500)ND (10)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1-Dichloroethene 230000 1,000,000 12000 ND (0.5)ND (500)ND (500)ND (500)ND (500)ND (10)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
trans-Dicholorethene NE NE NE ND (0.5)ND (500)ND (500)ND (500)ND (500)ND (10)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1-Dichloroethane 3600 16000 1800 ND (0.5)ND (500)ND (500)ND (500)ND (500)ND (10)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
cis-Dichloroethene 160000 2,300,000 261 ND (0.5)ND (500)ND (500)ND (500)ND (500)ND (10)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
Chloroform 320 1400 85 ND (0.5)ND (500)ND (500)ND (500)ND (500)ND (10)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1,1-Trichloroethane 8,100,000 36,000,000 62000 ND (0.5)ND (500)ND (500)ND (500)ND (500)ND (10)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,2-Dichloroethane 460 2000 3.6 ND (0.5)ND (500)ND (500)ND (500)ND (500)ND (10)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
Trichloroethene 940 6000 680 ND (0.5)4920 (500)ND (500)1860 (500)ND (500)ND (10)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1,2-Trichloroethane 1100 5000 38 ND (0.5)ND (500)ND (500)ND (500)ND (500)ND (10)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
Tetracholorethene 24000 100000 1900 4.15 (0.5)2670000 (10000)701000 (2500)1090000 (5000)350000 (500)632 (10)19.4 (0.5)43.2 (0.5)21.1 (0.5)93.0 (0.5)71.9 (0.5)
Sample ID. No.RDC-15 RDC-15 RDC-15 RDC-15 RDC-15 RDC-15 RDC-16 RDC-16 RDC-16 RDC-16 RDC-16
Date Sampled 11/4/2014 11/4/2014 11/4/2014 11/4/2014 11/4/2014 11/4/2014 11/4/2014 11/4/2014 11/4/2014 11/4/2014 11/4/2014
Sample Depth 8-10'10-12'12-14'14-16'16-18'18-20'4-6'6-8'8-10'10-12'12-14'
Units ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg
Propene NE NE NE ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
2-Methylpropene NE NE NE ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)
Vinyl Chloride 5.9 1700 110 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1-Dichloroethene 230000 1,000,000 12000 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
trans-Dicholorethene NE NE NE ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)1.06 (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1-Dichloroethane 3600 16000 1800 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
cis-Dichloroethene 160000 2,300,000 261 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)44.3 (0.5)28.5 (0.5)27.0 (0.5)4.84 (0.5)ND (0.5)
Chloroform 320 1400 85 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1,1-Trichloroethane 8,100,000 36,000,000 62000 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,2-Dichloroethane 460 2000 3.6 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
Trichloroethene 940 6000 680 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)1.23 (0.5)1.13 (0.5)ND (0.5)ND (0.5)
1,1,2-Trichloroethane 1100 5000 38 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
Tetracholorethene 24000 100000 1900 51.8 (0.5)13.2 (0.5)18.3 (0.5)15.0 (0.5)11.8 (0.5)6.45 (0.5)1.69 (0.5)11.4 (0.5)11.3 (0.5)13.2 (0.5)1.09 (0.5)
Residential
RSL Industrial RSL CDPHE
GPV
Residential
RSL Industrial RSL CDPHE
GPV
25147073 Tables: Table 1-Soil Page 6 of 14
2/1/2019
Table 1
Summary of RDC Soil Analytical Results
Wheat Ridge Brownfield Remediation
7690 West 38th Avenue
Wheat Ridge, Colorado
Terracon Project Number 25147073
Sample ID. No.RDC-16 RDC-16 RDC-16 RDC-17 RDC-17 RDC-17 RDC-17 RDC-17 RDC-17 RDC-17 RDC-17
Date Sampled 11/4/2014 11/4/2014 11/4/2014 11/4/2014 11/4/2014 11/4/2014 11/4/2014 11/4/2014 11/4/2014 11/4/2014 11/4/2014
Sample Depth 14-16'16-18'18-20'4-6'6-8'8-10'10-12'12-14'14-16'16-18'18-20'
Units ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg
Propene NE NE NE ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
2-Methylpropene NE NE NE ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)
Vinyl Chloride 5.9 1700 110 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1-Dichloroethene 230000 1,000,000 12000 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
trans-Dicholorethene NE NE NE ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1-Dichloroethane 3600 16000 1800 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
cis-Dichloroethene 160000 2,300,000 261 ND (0.5)ND (0.5)ND (0.5)33.6 (0.5)44.9 (0.5)79.8 (0.5)4.29 (0.5)1.25 (0.5)ND (0.5)ND (0.5)ND (0.5)
Chloroform 320 1400 85 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1,1-Trichloroethane 8,100,000 36,000,000 62000 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,2-Dichloroethane 460 2000 3.6 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
Trichloroethene 940 6000 680 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)1.53 (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1,2-Trichloroethane 1100 5000 38 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
Tetracholorethene 24000 100000 1900 1.87 (0.5)ND (0.5)1.53 (0.5)2.07 (0.5)3.97 (0.5)15.5 (0.5)33.2 (0.5)18.7 (0.5)1.47 (0.5)3.03 (0.5)1.51 (0.5)
Sample ID. No.RDC-18 RDC-18 RDC-18 RDC-18 RDC-18 RDC-18 RDC-18 RDC-18 RDC-19 RDC-19 RDC-19
Date Sampled 11/4/2014 11/4/2014 11/4/2014 11/4/2014 11/4/2014 11/4/2014 11/4/2014 11/4/2014 11/4/2014 11/4/2014 11/4/2014
Sample Depth 4-6'6-8'8-10'10-12'12-14'14-16'16-18'18-20'4-6'6-8'8-10'
Units ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg
Propene NE NE NE ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
2-Methylpropene NE NE NE ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)
Vinyl Chloride 5.9 1700 110 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1-Dichloroethene 230000 1,000,000 12000 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
trans-Dicholorethene NE NE NE ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1-Dichloroethane 3600 16000 1800 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
cis-Dichloroethene 160000 2,300,000 261 0.85 (0.5)21.5 (0.5)2.91 (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)2.16 (0.5)ND (0.5)ND (0.5)
Chloroform 320 1400 85 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1,1-Trichloroethane 8,100,000 36,000,000 62000 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,2-Dichloroethane 460 2000 3.6 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
Trichloroethene 940 6000 680 ND (0.5)7.65 (0.5)2.10 (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)7.07 (0.5)ND (0.5)ND (0.5)
1,1,2-Trichloroethane 1100 5000 38 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
Tetracholorethene 24000 100000 1900 38.2 (0.5)300 (0.5)97.4 (0.5)8.79 (0.5)ND (0.5)5.68 (0.5)1.17 (0.5)1.26 (0.5)34.1 (0.5)64.2 (0.5)12.9 (0.5)
Residential
RSL Industrial RSL CDPHE
GPV
Residential
RSL Industrial RSL CDPHE
GPV
25147073 Tables: Table 1-Soil Page 7 of 14
2/1/2019
Table 1
Summary of RDC Soil Analytical Results
Wheat Ridge Brownfield Remediation
7690 West 38th Avenue
Wheat Ridge, Colorado
Terracon Project Number 25147073
Sample ID. No.RDC-19 RDC-19 RDC-19 RDC-19 RDC-19 RDC-20 RDC-20 RDC-20 RDC-20 RDC-20 RDC-20
Date Sampled 11/4/2014 11/4/2014 11/4/2014 11/4/2014 11/4/2014 11/5/2014 11/5/2014 11/5/2014 11/5/2014 11/5/2014 11/5/2014
Sample Depth 10-12'12-14'14-16'16-18'18-20'4-6'6-8'8-10'10-12'12-14'14-16'
Units ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg
Propene NE NE NE ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (50)ND (10)ND (0.5)ND (0.5)
2-Methylpropene NE NE NE ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (200)ND (40)ND (2.0)ND (2.0)
Vinyl Chloride 5.9 1700 110 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (50)ND (10)ND (0.5)ND (0.5)
1,1-Dichloroethene 230000 1,000,000 12000 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (50)ND (10)ND (0.5)ND (0.5)
trans-Dicholorethene NE NE NE ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (50)ND (10)ND (0.5)ND (0.5)
1,1-Dichloroethane 3600 16000 1800 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (50)ND (10)ND (0.5)ND (0.5)
cis-Dichloroethene 160000 2,300,000 261 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (50)ND (10)ND (0.5)ND (0.5)
Chloroform 320 1400 85 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (50)ND (10)ND (0.5)ND (0.5)
1,1,1-Trichloroethane 8,100,000 36,000,000 62000 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (50)ND (10)ND (0.5)ND (0.5)
1,2-Dichloroethane 460 2000 3.6 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (50)ND (10)ND (0.5)ND (0.5)
Trichloroethene 940 6000 680 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (50)ND (10)ND (0.5)ND (0.5)
1,1,2-Trichloroethane 1100 5000 38 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (50)ND (10)ND (0.5)ND (0.5)
Tetracholorethene 24000 100000 1900 1.33 (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)18.4 (0.5)30.1 (0.5)5460 (50)816 (10)27.5 (0.5)2.90 (0.5)
Sample ID. No.RDC-20 RDC-20 RDC-21 RDC-21 RDC-21 RDC-21 RDC-21 RDC-21 RDC-21 RDC-21 RDC-22
Date Sampled 11/5/2014 11/5/2014 11/5/2014 11/5/2014 11/5/2014 11/5/2014 11/5/2014 11/5/2014 11/5/2014 11/5/2014 11/5/2014
Sample Depth 16-18'18-20'4-6'6-8'8-10'10-12'12-14'14-16'16-18'18-20'4-6'
Units ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg
Propene NE NE NE ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
2-Methylpropene NE NE NE ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)
Vinyl Chloride 5.9 1700 110 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1-Dichloroethene 230000 1,000,000 12000 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
trans-Dicholorethene NE NE NE ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1-Dichloroethane 3600 16000 1800 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
cis-Dichloroethene 160000 2,300,000 261 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)0.96 (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
Chloroform 320 1400 85 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1,1-Trichloroethane 8,100,000 36,000,000 62000 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,2-Dichloroethane 460 2000 3.6 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
Trichloroethene 940 6000 680 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1,2-Trichloroethane 1100 5000 38 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
Tetracholorethene 24000 100000 1900 5.66 (0.5)0.92 (0.5)2.23 (0.5)16.2 (0.5)10.2 (0.5)7.90 (0.5)1.45 (0.5)0.79 (0.5)ND (0.5)ND (0.5)38.4 (0.5)
Residential
RSL Industrial RSL CDPHE
GPV
Residential
RSL Industrial RSL CDPHE
GPV
25147073 Tables: Table 1-Soil Page 8 of 14
2/1/2019
Table 1
Summary of RDC Soil Analytical Results
Wheat Ridge Brownfield Remediation
7690 West 38th Avenue
Wheat Ridge, Colorado
Terracon Project Number 25147073
Sample ID. No.RDC-22 RDC-22 RDC-22 RDC-22 RDC-22 RDC-22 RDC-22 RDC-22 RDC-22 RDC-22 RDC-22
Date Sampled 11/5/2014 11/5/2014 11/5/2014 11/5/2014 11/5/2014 11/5/2014 11/5/2014 11/5/2014 11/5/2014 11/5/2014 11/5/2014
Sample Depth 6-8'8-10'10-12'12-14'14-16'16-18'18-20'20-22'22-24'24-26'26-28'
Units ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg
Propene NE NE NE ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
2-Methylpropene NE NE NE ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)
Vinyl Chloride 5.9 1700 110 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1-Dichloroethene 230000 1,000,000 12000 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
trans-Dicholorethene NE NE NE ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1-Dichloroethane 3600 16000 1800 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
cis-Dichloroethene 160000 2,300,000 261 ND (0.5)0.77 (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
Chloroform 320 1400 85 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1,1-Trichloroethane 8,100,000 36,000,000 62000 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,2-Dichloroethane 460 2000 3.6 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
Trichloroethene 940 6000 680 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1,2-Trichloroethane 1100 5000 38 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
Tetracholorethene 24000 100000 1900 4.42 (0.5)67.6 (0.5)9.92 (0.5)10.2 (0.5)1.08 (0.5)1.24 (0.5)ND (0.5)ND (0.5)ND (0.5)1.46 (0.5)6.35 (0.5)
Sample ID. No.RDC-22 RDC-23 RDC-23 RDC-23 RDC-23 RDC-23 RDC-23 RDC-23 RDC-23 RDC-24 RDC-24
Date Sampled 11/5/2014 11/5/2014 11/5/2014 11/5/2014 11/5/2014 11/5/2014 11/5/2014 11/5/2014 11/5/2014 11/5/2014 11/5/2014
Sample Depth 28-30'4-6'6-8'8-10'10-12'12-14'14-16'16-18'18-20'4-6'6-8'
Units ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg
Propene NE NE NE ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
2-Methylpropene NE NE NE ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)
Vinyl Chloride 5.9 1700 110 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1-Dichloroethene 230000 1,000,000 12000 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
trans-Dicholorethene NE NE NE ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1-Dichloroethane 3600 16000 1800 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
cis-Dichloroethene 160000 2,300,000 261 ND (0.5)ND (0.5)13.8 (0.5)3.16 (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
Chloroform 320 1400 85 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1,1-Trichloroethane 8,100,000 36,000,000 62000 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,2-Dichloroethane 460 2000 3.6 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
Trichloroethene 940 6000 680 ND (0.5)ND (0.5)8.90 (0.5)1.78 (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1,2-Trichloroethane 1100 5000 38 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
Tetracholorethene 24000 100000 1900 1.69 (0.5)397 (0.5)1660 (10)327 (0.5)23.8 (0.5)2.20 (0.5)0.90 (0.5)ND (0.5)ND (0.5)71.0 (0.5)38.4 (0.5)
Residential
RSL Industrial RSL CDPHE
GPV
Residential
RSL Industrial RSL CDPHE
GPV
25147073 Tables: Table 1-Soil Page 9 of 14
2/1/2019
Table 1
Summary of RDC Soil Analytical Results
Wheat Ridge Brownfield Remediation
7690 West 38th Avenue
Wheat Ridge, Colorado
Terracon Project Number 25147073
Sample ID. No.RDC-24 RDC-24 RDC-24 RDC-24 RDC-24 RDC-24 RDC-25 RDC-25 RDC-25 RDC-25 RDC-25
Date Sampled 11/5/2014 11/5/2014 11/5/2014 11/5/2014 11/5/2014 11/5/2014 11/6/2014 11/6/2014 11/6/2014 11/6/2014 11/6/2014
Sample Depth 8-10'10-12'12-14'14-16'16-18'18-20'4-6'6-8'8-10'10-12'12-14'
Units ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg
Propene NE NE NE ND (0.5)ND (10)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
2-Methylpropene NE NE NE ND (2.0)ND (40)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)
Vinyl Chloride 5.9 1700 110 ND (0.5)ND (10)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1-Dichloroethene 230000 1,000,000 12000 ND (0.5)ND (10)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
trans-Dicholorethene NE NE NE ND (0.5)ND (10)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1-Dichloroethane 3600 16000 1800 ND (0.5)ND (10)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
cis-Dichloroethene 160000 2,300,000 261 ND (0.5)ND (10)1.20 (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)1.26 (0.5)ND (0.5)ND (0.5)
Chloroform 320 1400 85 ND (0.5)ND (10)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1,1-Trichloroethane 8,100,000 36,000,000 62000 ND (0.5)ND (10)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,2-Dichloroethane 460 2000 3.6 ND (0.5)ND (10)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
Trichloroethene 940 6000 680 ND (0.5)ND (10)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1,2-Trichloroethane 1100 5000 38 ND (0.5)ND (10)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
Tetracholorethene 24000 100000 1900 100 (0.5)795 (10)195 (0.5)1.90 (0.5)10.7 (0.5)ND (0.5)46.0 (0.5)12.5 (0.5)18.7 (0.5)2.24 (0.5)1.89 (0.5)
Sample ID. No.RDC-25 RDC-25 RDC-25 RDC-26 RDC-26 RDC-26 RDC-26 RDC-26 RDC-26 RDC-26 RDC-26
Date Sampled 11/6/2014 11/6/2014 11/6/2014 11/6/2014 11/6/2014 11/6/2014 11/6/2014 11/6/2014 11/6/2014 11/6/2014 11/6/2014
Sample Depth 14-16'16-18'18-20'4-6'6-8'8-10'10-12'12-14'14-16'16-18'18-20'
Units ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg
Propene NE NE NE ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
2-Methylpropene NE NE NE ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)
Vinyl Chloride 5.9 1700 110 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1-Dichloroethene 230000 1,000,000 12000 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
trans-Dicholorethene NE NE NE ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1-Dichloroethane 3600 16000 1800 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
cis-Dichloroethene 160000 2,300,000 261 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
Chloroform 320 1400 85 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1,1-Trichloroethane 8,100,000 36,000,000 62000 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,2-Dichloroethane 460 2000 3.6 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
Trichloroethene 940 6000 680 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1,2-Trichloroethane 1100 5000 38 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
Tetracholorethene 24000 100000 1900 1.33 (0.5)0.80 (0.5)1.08 (0.5)8.09 (0.5)4.84 (0.5)1.41 (0.5)ND (0.5)0.84 (0.5)1.97 (0.5)0.81 (0.5)0.74 (0.5)
Residential
RSL Industrial RSL CDPHE
GPV
Residential
RSL Industrial RSL CDPHE
GPV
25147073 Tables: Table 1-Soil Page 10 of 14
2/1/2019
Table 1
Summary of RDC Soil Analytical Results
Wheat Ridge Brownfield Remediation
7690 West 38th Avenue
Wheat Ridge, Colorado
Terracon Project Number 25147073
Sample ID. No.RDC-27 RDC-27 RDC-27 RDC-27 RDC-27 RDC-27 RDC-27 RDC-27 RDC-28A RDC-28A RDC-28A
Date Sampled 11/6/2014 11/6/2014 11/6/2014 11/6/2014 11/6/2014 11/6/2014 11/6/2014 11/6/2014 12/10/2014 12/10/2014 12/10/2014
Sample Depth 4-6'6-8'8-10'10-12'12-14'14-16'16-18'18-20'4-5'5-7'7-9'
Units ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg
Propene NE NE NE ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
2-Methylpropene NE NE NE ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)
Vinyl Chloride 5.9 1700 110 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1-Dichloroethene 230000 1,000,000 12000 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
trans-Dicholorethene NE NE NE ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1-Dichloroethane 3600 16000 1800 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
cis-Dichloroethene 160000 2,300,000 261 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)1.19 (0.5)0.85 (0.5)ND (0.5)
Chloroform 320 1400 85 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1,1-Trichloroethane 8,100,000 36,000,000 62000 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,2-Dichloroethane 460 2000 3.6 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
Trichloroethene 940 6000 680 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)1.98 (0.5)2.34 (0.5)0.93 (0.5)
1,1,2-Trichloroethane 1100 5000 38 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
Tetracholorethene 24000 100000 1900 2.31 (0.5)1.33 (0.5)2.27 (0.5)0.96 (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)6.14 (0.5)11.0 (0.5)6.22 (0.5)
Sample ID. No.RDC-28A RDC-28A RDC-28A RDC-28A RDC-28A RDC-28A RDC-31 RDC-31 RDC-31 RDC-31 RDC-31
Date Sampled 12/10/2014 12/10/2014 12/10/2014 12/10/2014 12/10/2014 12/10/2014 12/22/2014 12/22/2014 12/22/2014 12/22/2014 12/22/2014
Sample Depth 9-11'11-13'13-15'15-17'17-19'19-20'2-4'4-6'6-8'8-10'10-12'
Units ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg
Propene NE NE NE ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
2-Methylpropene NE NE NE ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
Vinyl Chloride 5.9 1700 110 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1-Dichloroethene 230000 1,000,000 12000 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
trans-Dicholorethene NE NE NE ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1-Dichloroethane 3600 16000 1800 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
cis-Dichloroethene 160000 2,300,000 261 0.61 (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
Chloroform 320 1400 85 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)0.62 (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1,1-Trichloroethane 8,100,000 36,000,000 62000 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,2-Dichloroethane 460 2000 3.6 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
Trichloroethene 940 6000 680 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)0.90 (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1,2-Trichloroethane 1100 5000 38 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
Tetracholorethene 24000 100000 1900 2.67 (0.5)2.25 (0.5)0.86 (0.5)0.57 (0.5)ND (0.5)0.86 (0.5)1.65 (0.5)0.83 (0.5)ND (0.5)ND (0.5)ND (0.5)
Residential
RSL Industrial RSL CDPHE
GPV
Residential
RSL Industrial RSL CDPHE
GPV
25147073 Tables: Table 1-Soil Page 11 of 14
2/1/2019
Table 1
Summary of RDC Soil Analytical Results
Wheat Ridge Brownfield Remediation
7690 West 38th Avenue
Wheat Ridge, Colorado
Terracon Project Number 25147073
Sample ID. No.RDC-31 RDC-31 RDC-31 RDC-31 RDC-32 RDC-32 RDC-32 RDC-32 RDC-32 RDC-32 RDC-32
Date Sampled 12/22/2014 12/22/2014 12/22/2014 12/22/2014 12/22/2014 12/22/2014 12/22/2014 12/22/2014 12/22/2014 12/22/2014 12/22/2014
Sample Depth 12-14'14-16'16-18'18-20'2-4'4-6'6-8'8-10'10-12'12-14'14-16'
Units ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg
Propene NE NE NE ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
2-Methylpropene NE NE NE ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (2.0)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
Vinyl Chloride 5.9 1700 110 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1-Dichloroethene 230000 1,000,000 12000 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
trans-Dicholorethene NE NE NE ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1-Dichloroethane 3600 16000 1800 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
cis-Dichloroethene 160000 2,300,000 261 ND (0.5)ND (0.5)ND (0.5)ND (0.5)6.62 (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
Chloroform 320 1400 85 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1,1-Trichloroethane 8,100,000 36,000,000 62000 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,2-Dichloroethane 460 2000 3.6 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
Trichloroethene 940 6000 680 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1,2-Trichloroethane 1100 5000 38 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
Tetracholorethene 24000 100000 1900 ND (0.5)ND (0.5)0.87 (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)7.45 (0.5)ND (0.5)ND (0.5)
Sample ID. No.RDC-32 RDC-32 RDC-33 RDC-33 RDC-33 RDC-33 RDC-33 RDC-33 RDC-33 RDC-33 RDC-33
Date Sampled 12/22/2014 12/22/2014 12/22/2014 12/22/2014 12/22/2014 12/22/2014 12/22/2014 12/22/2014 12/22/2014 12/22/2014 12/22/2014
Sample Depth 16-18'18-20'2-4'4-6'6-8'7'8-10'10-12'12-14'14-16'16-18'
Units ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg
Propene NE NE NE ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
2-Methylpropene NE NE NE ND (0.5)ND (0.5)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)
Vinyl Chloride 5.9 1700 110 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1-Dichloroethene 230000 1,000,000 12000 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
trans-Dicholorethene NE NE NE ND (0.5)ND (0.5)ND (0.5)1.29 (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1-Dichloroethane 3600 16000 1800 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
cis-Dichloroethene 160000 2,300,000 261 ND (0.5)ND (0.5)10.0 (0.5)40.3 (0.5)22.4 (0.5)36.8 (0.5)24.1 (0.5)2.23 (0.5)ND (0.5)ND (0.5)ND (0.5)
Chloroform 320 1400 85 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1,1-Trichloroethane 8,100,000 36,000,000 62000 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,2-Dichloroethane 460 2000 3.6 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
Trichloroethene 940 6000 680 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)2.83 (0.5)0.85 (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1,2-Trichloroethane 1100 5000 38 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
Tetracholorethene 24000 100000 1900 ND (0.5)ND (0.5)1.37 (0.5)ND (0.5)1.05 (0.5)3.65 (0.5)139 (0.5)90.3 (0.5)8.69 (0.5)14.3 (0.5)2.18 (0.5)
Residential
RSL Industrial RSL CDPHE
GPV
Residential
RSL Industrial RSL CDPHE
GPV
25147073 Tables: Table 1-Soil Page 12 of 14
2/1/2019
Table 1
Summary of RDC Soil Analytical Results
Wheat Ridge Brownfield Remediation
7690 West 38th Avenue
Wheat Ridge, Colorado
Terracon Project Number 25147073
Sample ID. No.RDC-33 RDC-34 RDC-34 RDC-34 RDC-34 RDC-34 RDC-34 RDC-34 RDC-34 RDC-34
Date Sampled 12/22/2014 12/22/2014 12/22/2014 12/22/2014 12/22/2014 12/22/2014 12/22/2014 12/22/2014 12/22/2014 12/22/2014
Sample Depth 18-20'2-4'4-6'6-8'8-10'10-12'12-14'14-16'16-18'18-20'
Units ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg
Propene NE NE NE ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
2-Methylpropene NE NE NE ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)
Vinyl Chloride 5.9 1700 110 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1-Dichloroethene 230000 1,000,000 12000 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
trans-Dicholorethene NE NE NE ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1-Dichloroethane 3600 16000 1800 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
cis-Dichloroethene 160000 2,300,000 261 ND (0.5)ND (0.5)ND (0.5)ND (0.5)4.11 (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
Chloroform 320 1400 85 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1,1-Trichloroethane 8,100,000 36,000,000 62000 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,2-Dichloroethane 460 2000 3.6 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
Trichloroethene 940 6000 680 ND (0.5)ND (0.5)ND (0.5)ND (0.5)2.10 (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1,2-Trichloroethane 1100 5000 38 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
Tetracholorethene 24000 100000 1900 ND (0.5)9.94 (0.5)5.53 (0.5)10.2 (0.5)24.4 (0.5)ND (0.5)ND (0.5)1.06 (0.5)ND (0.5)ND (0.5)
Sample ID. No.MW-4 MW-4 MW-4 MW-4 MW-4 MW-4 MW-4 MW-4 MW-4
Date Sampled 12/23/2014 12/23/2014 12/23/2014 12/23/2014 12/23/2014 12/23/2014 12/23/2014 12/23/2014 12/23/2014
Sample Depth 2-4'4-6'6-8'8-10'10-12'12-14'14-16'16-18'18-20'
Units ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg
Propene NE NE NE ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
2-Methylpropene NE NE NE ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
Vinyl Chloride 5.9 1700 110 ND (0.5)96.5 (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1-Dichloroethene 230000 1,000,000 12000 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
trans-Dicholorethene NE NE NE ND (0.5)20.0 (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1-Dichloroethane 3600 16000 1800 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
cis-Dichloroethene 160000 2,300,000 261 1.92 (0.5)1550 (10)7.56 (0.5)26.6 (0.5)2.05 (0.5)20.8 (0.5)0.96 (0.5)0.58 (0.5)ND (0.5)
Chloroform 320 1400 85 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1,1-Trichloroethane 8,100,000 36,000,000 62000 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,2-Dichloroethane 460 2000 3.6 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
Trichloroethene 940 6000 680 ND (0.5)ND (0.5)ND (0.5)0.96 (0.5)ND (0.5)6.05 (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1,2-Trichloroethane 1100 5000 38 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
Tetracholorethene 24000 100000 1900 ND (0.5)ND (0.5)1.70 (0.5)44.2 (0.5)118 (0.5)444 (0.5)12.8 (0.5)1.36 (0.5)1.21 (0.5)
Residential
RSL Industrial RSL CDPHE
GPV
Residential
RSL Industrial RSL CDPHE
GPV
25147073 Tables: Table 1-Soil Page 13 of 14
2/1/2019
Table 1
Summary of RDC Soil Analytical Results
Wheat Ridge Brownfield Remediation
7690 West 38th Avenue
Wheat Ridge, Colorado
Terracon Project Number 25147073
Sample ID. No.MW-5 MW-5 MW-5 MW-5 MW-5 MW-5 MW-5 MW-5 MW-5
Date Sampled 12/22/2014 12/22/2014 12/22/2014 12/22/2014 12/22/2014 12/22/2014 12/22/2014 12/22/2014 12/22/2014
Sample Depth 2-4'4-6'6-8'8-10'10-12'12-14'14-16'16-18'18-20'
Units ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg
Propene NE NE NE ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
2-Methylpropene NE NE NE ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
Vinyl Chloride 5.9 1700 110 4.36 (0.5)10.7 (0.5)ND (0.5)3.10 (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1-Dichloroethene 230000 1,000,000 12000 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
trans-Dicholorethene NE NE NE ND (0.5)2.32 (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1-Dichloroethane 3600 16000 1800 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
cis-Dichloroethene 160000 2,300,000 261 47.8 (0.5)166 (0.5)2.86 (0.5)34.5 (0.5)20.0 (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
Chloroform 320 1400 85 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1,1-Trichloroethane 8,100,000 36,000,000 62000 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,2-Dichloroethane 460 2000 3.6 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
Trichloroethene 940 6000 680 ND (0.5)ND (0.5)ND (0.5)1.75 (0.5)2.40 (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1,2-Trichloroethane 1100 5000 38 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
Tetracholorethene 24000 100000 1900 ND (0.5)ND (0.5)ND (0.5)3.23 (0.5)40.3 (0.5)13.0 (0.5)2.02 (0.5)0.78 (0.5)2.07 (0.5)
Notes:
ug/kg = micrograms per kilogram
ND = Not detected
NE = Not Established
Residential
RSL Industrial RSL CDPHE
GPV
25147073 Tables: Table 1-Soil Page 14 of 14
2/1/2019
www. VistaGeoScience.com
Project No.:Site:AREA:Inj. Tool:Page: ________
Client:Injected Product:Crew:Date(s):
Address:Injection Area:Inj. Rig:Drill Rig:
Area/
Point No.
Date
(2015)
Time
(00:00)
Even Interval
Depth (feet)
Odd Interval
Depth (feet)
Target
BOS
(lbs.)
Target
Water
(gal.)
Target Bac..
(ml)
Initial Press.
(psi)
Flow
Press. (psi)
Flow
Rate
(gpm)
10 11 10
12 13 10
14 15 10
16 17 10
18 19 10
20 10
10 11 10
12 13 10
14 15 10
16 17 10
18 19 10
20 10
10 11 10
12 13 10
14 15 10
16 17 10
18 19 10
20 10
BOS100/200 Injection Log
BOS-100
Notes/Comments:
www. VistaGeoScience.com
Area/
Point No.
Date
(2015)
Time
(00:00)
Even Interval
Depth (feet)
Odd Interval
Depth (feet)
Target
BOS
(lbs.)
Target
Water
(gal.)
Target Bac..
(ml)
Initial Press.
(psi)
Flow
Press. (psi)
Flow
Rate
(gpm)
Notes/Comments:
10 11 10 10
12 13 10 10
14 15 10 10
16 17 10 1018191010
20 10 10
12/15/15 11:00 10 11 10 10 100
11:02 12 13 10 10 100
11:04 14 15 10 10 100
11:06 16 17 10 10 100
11:08 18 19 10 10 100
20
12/15/14 11:10 10 11 10 10 150
11:15 12 13 10 10 150
11:18 14 15 10 10 150
11:19 16 17 10 10 150
11:21 18 19 10 10 150
11:23 20 10 10 150
12/15/14 12:33 10 11 10 10 100
12:35 12 13 10 10 100
12:37 14 15 10 10 100
12:39 16 17 10 10 100
12:41 18 19 10 10 100
20
12/15/14 11:51 10 11 10 10 100
11:53 12 13 10 10 100
11:55 14 15 10 10 100
11:57 16 17 10 10 100
11:55 18 19 10 10 100
12:01 20 10 10 100
5
50lbs 50 gallons
50 lbs 50 gallons
60 lbs 60 gallons
60 lbs 60 gallons
6
7
8
www. VistaGeoScience.com
Area/
Point No.
Date
(2015)
Time
(00:00)
Even Interval
Depth (feet)
Odd Interval
Depth (feet)
Target
BOS
(lbs.)
Target
Water
(gal.)
Target Bac..
(ml)
Initial Press.
(psi)
Flow
Press. (psi)
Flow
Rate
(gpm)
Notes/Comments:
12/15/14 12:05 10 11 10 10 100
12:07 12 13 10 10 100
12:09 14 15 10 10 100
12:11 16 17 10 10 100
12:13 18 19 10 10 100
20
12/15/14 12:21 10 11 10 10 100
12:23 12 13 10 10 100
12:25 14 15 10 10 100
12:27 16 17 10 10 100
12:29 18 19 10 10 100
12:31 20 10 10 100
12/15/14 12:38 10 11 10 10 175
12:40 12 13 10 10 175
12:41 14 15 10 10 175
12:43 16 17 10 10 175
12:45 18 19 10 10 175
20
02/02/15 11:32 10 11 10 10 200 125
11:35 12 13 10 10 100 125
11:37 14 15 10 10 900 260
11:42 16 17 10 10 200 150
11:44 18 19 10 10 200 150
20
02/02/15 11:57 10 11 10 10 100 50
12:10 12 13 10 10 400 50
12:13 14 15 10 10 50 50
12:15 16 17 10 10 100 50
12:17 18 19 10 10 150 50
12:20 20 10 10 150 100
02/02/15 12:31 10 11 10 10 50 50
30
50lbs 50 gallons
60lbs 60 gallons
60 lbs 60 gallons
11
31
50 lbs 50 gallons
50 lbs 50 gallons9
10
Pull and Repush
www. VistaGeoScience.com
Area/
Point No.
Date
(2015)
Time
(00:00)
Even Interval
Depth (feet)
Odd Interval
Depth (feet)
Target
BOS
(lbs.)
Target
Water
(gal.)
Target Bac..
(ml)
Initial Press.
(psi)
Flow
Press. (psi)
Flow
Rate
(gpm)
Notes/Comments:
12:33 12 13 10 10 25 25
12:36 14 15 10 10 25 25
12:38 16 17 10 10 100 50
12:40 18 19 10 10 225 100
20
02/02/15 12:52 10 11 10 10 25 25
12:54 12 13 10 10 25 25
12:57 14 15 10 10 25 25
12:59 16 17 10 10 100 25
13:02 18 19 10 10 225 50
13:04 20 10 10 1200 75
02/02/15 13:13 10 11 10 10 25 25
13:20 12 13 10 10 25 25
13:23 14 15 10 10 800 50
13:26 16 17 10 10 50 25
13:28 18 19 10 10 400 100
20
02/02/15 13:37 10 11 10 10 25 25
13:40 12 13 10 10 75 25
13:42 14 15 10 10 175 50
13:44 16 17 10 10 250 50
14:13 18 19 10 10 150 100
14:17 20 10 10 125 75
02/02/15 14:27 10 11 10 10 100 25
14:31 12 13 10 10 50 25
14:33 14 15 10 10 150 75
14:41 16 17 10 10 25 25
14:44 18 19 10 10 250 110
20
02/02/15 15:01 10 11 10 10 25 25
15:04 12 13 10 10 560 25
50 lbs 50 gallons
26
25
29
28
27
Pull and Repush
60 lbs 60 gallons
50 lbs 50 gallons
60 lbs 60 gallons
50 lbs 50 gallons
Surface from old BH/Plug
www. VistaGeoScience.com
Area/
Point No.
Date
(2015)
Time
(00:00)
Even Interval
Depth (feet)
Odd Interval
Depth (feet)
Target
BOS
(lbs.)
Target
Water
(gal.)
Target Bac..
(ml)
Initial Press.
(psi)
Flow
Press. (psi)
Flow
Rate
(gpm)
Notes/Comments:
15:06 14 15 10 10 50 25
15:08 16 17 10 10 50 25
15:11 18 19 10 10 50 25
15:12 20 10 10 50 25
02/02/15 15:25 10 11 10 10 50 25
15:28 12 13 10 5 50 25
15:33 14 15 10 15 50 50 25
15:35 16 17 10 10 50 25
15:38 18 19 10 10 225 100 25
20
02/02/15 16:13 10 11 10 10 50 25
16:17 12 13 10 10 50 25
16:20 14 15 10 10 100 50
16;22 16 17 10 10 100 50
16:25 18 19 10 10 100 50
20
02/03/15 8:33 10 11 10 10 25 25
8:36 12 13 10 10 50 25
8:39 14 15 10 10 50 25
8:41 16 17 10 10 150 25
8:43 18 19 10 10 150 25
20
02/03/15 9:12 10 11 10 10 25 25
9:16 12 13 10 10 100 25
9:19 14 15 10 10 25 25
9:20 16 17 10 10 100 25
9:23 18 19 10 10 250 25
9:25 20 10 10 175 50
02/03/15 9:42 10 11 10 10 25 25
9:44 12 13 10 10 25 25
9:46 14 15 10 10 25 25
50 lbs 50 gallons
50 lbs 50 gallons
50 lbs 50 gallons
60 lbs 60 gallons
60 lbs 60 gallons
Surface in asphalt cracks
Surface at end
Minor Surface
Surface at end
24
23
57
65
56
www. VistaGeoScience.com
Area/
Point No.
Date
(2015)
Time
(00:00)
Even Interval
Depth (feet)
Odd Interval
Depth (feet)
Target
BOS
(lbs.)
Target
Water
(gal.)
Target Bac..
(ml)
Initial Press.
(psi)
Flow
Press. (psi)
Flow
Rate
(gpm)
Notes/Comments:
9:49 16 17 10 10 25 25
9:52 18 19 10 10 100 25
20
02/03/15 10:04 10 11 10 10 25 25
10:07 12 13 10 10 25 25
10:09 14 15 10 10 100 25
10:12 16 17 10 10 100 25
10:14 18 19 10 10 200 25
10:16 20 10 10 200 25
02/03/15 10:28 10 11 10 10 25 25
10:31 12 13 10 10 25 25
10:33 14 15 10 10 50 25
10:35 16 17 10 10 100 25
10:37 18 19 10 10 100 25
20
02/03/15 10:50 10 11 10 10 75 25
10:53 12 13 10 10 25 25
10:55 14 15 10 10 100 25
10:58 16 17 10 10 75 25
11:00 18 19 10 10 150 25
11:02 20 10 10 150 25
02/03/15 11:19 10 11 10 10 25 25
11:23 12 13 10 10 100 25
11:27 14 15 10 10 50 25
11:31 16 17 10 10 50 25
11:34 18 19 10 10 100 25
20
02/03/15 11:55 10 11 10 10 50 25
11:58 12 13 10 10 75 25
12:01 14 15 10 10 50 25
12:04 16 17 10 10 150 25
60 lbs 60 gallons
50 lbs 50 gallons
50 lbs 50 gallons
60 lbs 60 gallons
50 lbs 50 gallons
55
54
51
53
52
67
www. VistaGeoScience.com
Area/
Point No.
Date
(2015)
Time
(00:00)
Even Interval
Depth (feet)
Odd Interval
Depth (feet)
Target
BOS
(lbs.)
Target
Water
(gal.)
Target Bac..
(ml)
Initial Press.
(psi)
Flow
Press. (psi)
Flow
Rate
(gpm)
Notes/Comments:
12:06 18 19 10 10 250 25
20
02/03/15 12:23 10 11 10 10 50 25
12:27 12 13 10 10 50 25
12:29 14 15 10 10 75 25
12:31 16 17 10 10 75 25
12:33 18 19 10 10 175 50
12:36 20 10 10 100 50
02/03/15 13:00 10 11 10 10 25 25
13:04 12 13 10 10 600 25
13:08 14 15 10 10 25 25
13:11 16 17 10 10 75 25
13:16 18 19 10 10 150 25
13:19 20 10 10 300 75
02/03/15 13:33 10 11 10 10 100 25
13:35 12 13 10 10 50 25
13:39 14 15 10 10 100 25
13:41 16 17 10 10 150 25
13:43 18 19 10 10 50 25
20
02/03/15 13:53 10 11 10 10 25 25
13:56 12 13 10 10 25 25
13:59 14 15 10 10 25 25
14:01 16 17 10 10 75 25
14:03 18 19 10 10 100 25
14:08 20 10 10 150 25
02/05/15 8:57 10 11 10 10 150 25
9:00 12 13 10 10 175 25
9:04 14 15 10 10 175 25
9:07 16 17 10 10 200 25
9:10 18 19 10 10 175 25
50 lbs 50 gallons
60 lbs 60 gallons
50 lbs 50 gallons
48
47
46
45
50
51 50 lbs 50 gallons
60 lbs 60 gallons
60 lbs 60 gallons
www. VistaGeoScience.com
Area/
Point No.
Date
(2015)
Time
(00:00)
Even Interval
Depth (feet)
Odd Interval
Depth (feet)
Target
BOS
(lbs.)
Target
Water
(gal.)
Target Bac..
(ml)
Initial Press.
(psi)
Flow
Press. (psi)
Flow
Rate
(gpm)
Notes/Comments:
20
02/05/15 9:28 10 11 10 10 50 25
9:29 12 13 10 10 50 25
9:31 14 15 10 10 75 25
9:33 16 17 10 10 125 25
9:35 18 19 10 10 175 25
9:37 20 10 10 300 100
02/05/15 9:46 10 11 10 10 125 25
9:49 12 13 10 10 125 25
9:54 14 15 10 10 125 25
9:56 16 17 10 10 125 25
9:59 18 19 10 10 200 25
20
02/05/15 15:50 10 11 10 10 125 25
15:53 12 13 10 10 150 75
15:55 14 15 10 10 175 75
15:58 16 17 10 10 175 75
16:00 18 19 10 10 200 125
16:02 20 10 10 125 75
02/05/15 16:19 10 11 10 10 125 100
16:22 12 13 10 10 125 100
16:24 14 15 10 10 125 100
16:26 16 17 10 10 150 75
16:31 18 19 10 10 200 75
20
02/05/15 16:44 10 11 10 10 175 75
16:46 12 13 10 10 175 75
16:47 14 15 10 10 1200 75
16:49 16 17 10 10 175 75
16:51 18 19 10 10 175 75
16:53 20 10 10 300 200
44
43
42
41
40
60 lbs 60 gallons
50 lbs 50 gallons
60 lbs 60 gallons
50 lbs 50 gallons
60 lbs 60 gallons
www. VistaGeoScience.com
Area/
Point No.
Date
(2015)
Time
(00:00)
Even Interval
Depth (feet)
Odd Interval
Depth (feet)
Target
BOS
(lbs.)
Target
Water
(gal.)
Target Bac..
(ml)
Initial Press.
(psi)
Flow
Press. (psi)
Flow
Rate
(gpm)
Notes/Comments:
02/05/15 17:18 10 11 10 10 100 75
17:20 12 13 10 10 100 75
17:23 14 15 10 10 100 75
17:26 16 17 10 10 150 75
17:30 18 19 10 10 150 100
20
02/06/15 8:24 10 11 10 10 1200 75
8:26 12 13 10 10 800 75
8:28 14 15 10 10 100 75
8:29 16 17 10 10 100 75
8:55 18 19 10 10 275 125
8:57 20 10 10 125 100
02/06/15 9:08 10 11 10 10 75 25
9:09 12 13 10 10 100 25
9;23 14 15 10 10 200 25
9;33 16 17 10 10 300 100
9:38 18 19 10 10 200 100
20
02/06/15 9:51 10 11 10 10 100 50
12 13
14 15
16 17
18 19
20
02/06/15 10:04 10 11 10 10 100 50
10L07 12 13 10 10 100 50
10:09 14 15 10 10 100 100
10:11 16 17 10 10 200 100
10:13 18 19 10 10 175 150
20
Tool Clogged/Pull and Repush
Tool Clogged/Valve Bad/Pull and Repush
39
38
37
36
35
50 lbs 50 gallons
60 lbs 60 gallons
50 lbs 50 gallons
10 lbs 10 gallons
50 lbs 50 gallons
Tool Clogged/Pull and Repush
Piezometer Influence > 2" away (Skip Interval)
www. VistaGeoScience.com
Area/
Point No.
Date
(2015)
Time
(00:00)
Even Interval
Depth (feet)
Odd Interval
Depth (feet)
Target
BOS
(lbs.)
Target
Water
(gal.)
Target Bac..
(ml)
Initial Press.
(psi)
Flow
Press. (psi)
Flow
Rate
(gpm)
Notes/Comments:
02/06/15 10:21 10 11 10 10 100 50
10:25 12 13 10 10 100 50
10:31 14 15 10 10 100 75
10:33 16 17 10 10 100 75
10:35 18 19 10 10 125 75
10:37 20 10 10 200 175
02/06/15 10:47 10 11 10 10 100 50
10:51 12 13 10 10 125 50
10:52 14 15 10 10 50 50
10:55 16 17 10 10 100 75
10:57 18 19 10 10 200 75
20
02/06/15 11:11 10 11 10 10 150 50
11:14 12 13 10 10 75 50
11:16 14 15 10 10 100 50
11:18 16 17 10 10 100 50
11:21 18 19 10 10 150 100
11:23 20 10 10 175 50
02/06/15 11:36 10 11 10 10 100 50
11:39 12 13 10 10 100 50
11:41 14 15 10 10 125 50
11:43 16 17 10 10 125 50
11:45 18 19 10 10 200 125
11:47 20 10 10 225 175
02/06/15 12:02 10 11 10 10 100 50
12:04 12 13 10 10 100 50
12:07 14 15 10 10 100 50
12:09 16 17 10 10 100 50
12:11 18 19 10 10 225 150
20
60 lbs 60 gallons
60 lbs 60 gallons
50 lbs 50 gallons
32
2
3
34
33
60 lbs 60 gallons
50 lbs 50 gallons
www. VistaGeoScience.com
Area/
Point No.
Date
(2015)
Time
(00:00)
Even Interval
Depth (feet)
Odd Interval
Depth (feet)
Target
BOS
(lbs.)
Target
Water
(gal.)
Target Bac..
(ml)
Initial Press.
(psi)
Flow
Press. (psi)
Flow
Rate
(gpm)
Notes/Comments:
02/06/15 12:21 10 11 10 10 100 50
12:23 12 13 10 10 200 50
12:27 14 15 10 10 150 50
12:29 16 17 10 10 100 50
12;31 18 19 10 10 150 50
12:33 20 10 10 200 100
02/06/15 12:45 10 11 10 10 100 50
12:47 12 13 10 10 100 50
12:49 14 15 10 10 200 100
12:51 16 17 10 10 200 75
12:53 18 19 10 10 200 150
20
02/06/15 13:04 10 11 10 10 150 50
13:05 12 13 10 10 100 50
13:09 14 15 10 10 150 50
16 17
18 19
20
02/06/15 13:30 10 11 10 10 50 50
13:36 12 13 10 10 100 75
13:37 14 15 10 10 125 50
13:45 16 17 10 10 100 50
13:47 18 19 10 10 200 50
13:50 20 10 10 300 150
02/06/15 14:00 10 11 10 10 100 25
14:02 12 13 10 10 125 25
14:04 14 15 10 10 100 25
14:06 16 17 10 10 250 25
14:08 18 19 10 10 300 50
20
60 lbs 60 gallons
50 lbs 50 gallons
30 lbs 30 gallons
4
5
6
70
69
60 lbs 60 gallons
50 lbs 50 gallons
Surfacing/Moved to hole 70 to avoid further surfacing
www. VistaGeoScience.com
Area/
Point No.
Date
(2015)
Time
(00:00)
Even Interval
Depth (feet)
Odd Interval
Depth (feet)
Target
BOS
(lbs.)
Target
Water
(gal.)
Target Bac..
(ml)
Initial Press.
(psi)
Flow
Press. (psi)
Flow
Rate
(gpm)
Notes/Comments:
02/06/15 14:23 10 11 10 10 50 25
14;26 12 13 10 10 50 25
14:29 14 15 10 10 25 25
14:40 16 17 10 10 100 50
14:43 18 19 10 10 100 50
14:45 20 10 10 300 150
02/06/15 14:58 10 11 10 10 50 25
15:01 12 13 10 10 50 25
15:03 14 15 10 10 50 25
15:06 16 17 10 10 200 50
15:08 18 19 10 10 300 50
15:10 20 10 10 300 150
02/06/15 15:26 10 11 10 10 100 50
15:29 12 13 10 10 50 50
15;31 14 15 10 10 125 50
15;34 16 17 10 10 125 50
15:36 18 19 10 10 225 100
20
02/06/15 15:52 10 11 10 10 100 25
12 13
14 151617
18 19
20
02/06/15 16;12 10 11 10 20 50 25
16:15 12 13 10 20 50 25
16:19 14 15 10 20 100 50
16:02 16 17 10 20 150 100
16:24 18 19 10 20 200 75
20
02/06/15 16:41 10 11 10 20 100 50
Surfacing at end of interval/Moved to hole G-1
G-1
68
66
15
19
60 lbs 60 gallons
60 lbs 60 gallons
50 lbs 50 gallons
Surfacing at end of interval through adj. MW
10 lbs 10 gallons
50 lbs 100 gallons
www. VistaGeoScience.com
Area/
Point No.
Date
(2015)
Time
(00:00)
Even Interval
Depth (feet)
Odd Interval
Depth (feet)
Target
BOS
(lbs.)
Target
Water
(gal.)
Target Bac..
(ml)
Initial Press.
(psi)
Flow
Press. (psi)
Flow
Rate
(gpm)
Notes/Comments:
16:44 12 13 10 20 100 50
16:48 14 15 10 20 100 50
16:50 16 17 10 20 200 50
16:52 18 19 10 20 310 75
16:51 20 10 20 500 100
02/09/15 8:48 10 11 10 20 100 50
8:51 12 13 10 20 50 50
8:53 14 15 10 20 150 75
8:55 16 17 10 20 150 100
8:57 18 19 10 20 200 100
20
02/09/15 9:07 10 11 10 20 100 50
9:10 12 13 10 20 75 50
9:12 14 15 10 20 100 50
9:14 16 17 10 20 125 50
9:16 18 19 10 20 200 100
9:18 20 10 20 200 150
02/09/15 9:21 10 11 10 20 100 50
9:29 12 13 10 20 100 50
9:30 14 15 10 20 100 50
9:32 16 17 10 20 200 100
9:35 18 19 10 20 100 50
20
02/09/15 9:59 10 11 10 20 100 50
10:00 12 13 10 20 75 50
10:02 14 15 10 20 150 25
10:13 16 17 10 20 200 50
10:15 18 19 10 20 300 150
10:18 20 10 20 100 50
02/09/15 10:29 10 11 10 20 100 50
10:32 12 13 10 20 200 50
Tool Clogged;Pull and repush
Surfacing near hole 42 at trench
G-2
G-3
G-4
G-5
G-6
60 lbs 120 gallons
50 lbs 100 gallons
60 lbs 120 gallons
50 lbs 100 gallons
60 lbs 120 gallons
www. VistaGeoScience.com
Area/
Point No.
Date
(2015)
Time
(00:00)
Even Interval
Depth (feet)
Odd Interval
Depth (feet)
Target
BOS
(lbs.)
Target
Water
(gal.)
Target Bac..
(ml)
Initial Press.
(psi)
Flow
Press. (psi)
Flow
Rate
(gpm)
Notes/Comments:
10:34 14 15 10 20 100 50
10:37 16 17 10 20 200 50
10:39 18 19 10 20 200 100
20
02/09/15 10:50 10 11 10 20 100 50
10:54 12 13 10 20 100 50
10:57 14 15 10 20 100 50
16 17 1000
18 19
20
02/09/15 11:21 10 11 10 10 300 50
11:23 12 13 10 10 150 50
11:32 14 15 10 10 1000 100
11:36 16 17 10 10 220 125
11:38 18 19 10 10 450 125
20
02/09/15 15:54 10 11 10 20 100 75
15:00 12 13 10 20 125 100
15:03 14 15 10 20 125 100
15:06 16 17 10 20 200 100
15:08 18 19 10 20 300 100
20
02/09/15 15:23 10 11 10 20 50 25
15:26 12 13 10 20 150 50
15:28 14 15 10 20 150 50
15:31 16 17 10 20 150 100
15:33 18 19 10 20 200 100
15:36 20 10 20 200 150
02/09/15 15:47 10 11 10 20 100 50
15:50 12 13 10 20 100 50
15:52 14 15 10 20 100 50
60 lbs 120 gallons
G-7
G-8
B-49
G-9
G-10
50 lbs 100 gallons
30 lbs 60 gallons
50 lbs 50 gallons
50 lbs 100 gallons
Immediate surfacing between hole 44 and 45; moved to hole B-49
Pump?
Surfacing in trench
Talked to mike about pump and surfacing at 12:00
www. VistaGeoScience.com
Area/
Point No.
Date
(2015)
Time
(00:00)
Even Interval
Depth (feet)
Odd Interval
Depth (feet)
Target
BOS
(lbs.)
Target
Water
(gal.)
Target Bac..
(ml)
Initial Press.
(psi)
Flow
Press. (psi)
Flow
Rate
(gpm)
Notes/Comments:
15:55 16 17 10 20 200 100
15:58 18 19 10 20 200 100
20
02/09/15 16:14 10 11 10 20 100 50
16:17 12 13 10 20 125 75
16:19 14 15 10 20 100 75
16:21 16 17 10 20 225 100
16:24 18 19 10 20 175 100
16:26 20 10 20 175 25
02/09/15 16:37 10 11 10 20 100 50
16:39 12 13 10 20 100 50
16:41 14 15 10 20 200 100
16:43 16 17 10 20 300 100
16:45 18 19 10 20 200 100
20
02/09/15 17:01 10 11 10 20 100 50
17:06 12 13 10 20 175 75
17:09 14 15 10 20 200 100
17:11 16 17 10 20 200 100
17:13 18 19 10 20 200 100
17:15 20 10 20 300 175
02/09/15 17:31 10 11 10 20 100 75
17:34 12 13 10 20 100 75
17:35 14 15 10 20 200 75
17:38 16 17 10 20 250 100
17:40 18 19 10 20 250 100
20
02/10/15 8:24 10 11 10 20 1000 75
8:25 12 13 10 20 100 75
8:27 14 15 10 20 125 75
8:29 16 17 10 20 175 75
50 lbs 100 gallons
60 lbs 120 gallons
50 lbs 100 gallons
Minor surfacing at 14 and 15
60 lbs 120 gallons
50 lbs 100 gallons
G-12
G-13
G-24
G-23
G-17
G-11
www. VistaGeoScience.com
Area/
Point No.
Date
(2015)
Time
(00:00)
Even Interval
Depth (feet)
Odd Interval
Depth (feet)
Target
BOS
(lbs.)
Target
Water
(gal.)
Target Bac..
(ml)
Initial Press.
(psi)
Flow
Press. (psi)
Flow
Rate
(gpm)
Notes/Comments:
8:31 18 19 10 20 175 75
20
02/10/15 8:45 10 11 10 20 50 50
8:48 12 13 10 20 50 50
8:50 14 15 10 20 125 50
8:52 16 17 10 20 150 50
8:54 18 19 10 20 150 100
8:56 20 10 20 200 100
02/10/15 9:10 10 11 10 20 75 25
9:13 12 13 10 20 75 25
9:15 14 15 10 20 75 25
9:18 16 17 10 20 200 100
9:19 18 19 10 20 100 75
20
02/10/15 9:29 10 11 10 20 100 75
9:31 12 13 10 20 100 75
9:33 14 15 10 20 100 50
9:35 16 17 10 20 100 50
9:37 18 19 10 20 100 50
9:39 20 10 20 100 50
02/10/15 9:51 10 11 10 20 75 25
9:54 12 13 10 20 75 25
9:56 14 15 10 20 75 25
10:12 16 17 10 20 250 125
10:15 18 19 10 20 125 75
20
02/10/15 10:29 10 11 10 20 75 50
10:32 12 13 10 20 150 75
10:35 14 15 10 20 100 50
10:38 16 17 10 20 150 50
10:40 18 19 10 20 150 50
G-17
G-18
G-19
G-20
G-21
G-22
50 lbs 100 gallons
60 lbs 120 gallons
50 lbs 100 gallons
60 lbs 120 gallons
50 lbs 100 gallons
Tool clogged; Pull and repush
Pump?
www. VistaGeoScience.com
Area/
Point No.
Date
(2015)
Time
(00:00)
Even Interval
Depth (feet)
Odd Interval
Depth (feet)
Target
BOS
(lbs.)
Target
Water
(gal.)
Target Bac..
(ml)
Initial Press.
(psi)
Flow
Press. (psi)
Flow
Rate
(gpm)
Notes/Comments:
10:42 20 10 20 150 100
02/10/15 10:56 10 11 10 20 100 75
13:22 12 13 10 20 50 25
13:24 14 15 10 20 50 25
13:27 16 17 10 20 200 100
13:29 18 19 10 20 200 75
20
02/10/15 13:41 10 11 10 20 150 125
13:44 12 13 10 20 200 150
14 15
13:46 16 17 20 40 200 175
13:48 18 19 10 20 200 175
13:51 20 10 20 200 175
02/10/15 14:10 10 11 10 20 50 25
14;16 12 13 10 20 50 25
14:19 14 15 10 20 175 75
14:21 16 17 10 20 100 75
14:23 18 19 10 20 175 100
20
02/10/15 14:34 10 11 10 20 100 50
14:36 12 13 10 20 100 50
14;38 14 15 10 20 100 50
14:40 16 17 10 20 100 50
14:42 18 19 10 20 125 50
14:44 20 10 20 200 100
02/10/15 14:58 10 11 10 20 125 50
15:03 12 13 10 20 150 50
15:05 14 15 10 20 200 75
15:07 16 17 10 20 225 100
15:09 18 19 10 20 175 75
20
Surfacing at end
Extra 10 lbs/20 gallons from 14' interval/Surfacing at end
Surfacing at end
G-27
G-28
G-29
G-25
G-26
60 lbs 120 gallons
50 lbs 100 gallons
60 lbs 120 gallons
Surfacing at end
50 lbs 100 gallons
60 lbs 120 gallons
50 lbs 100 gallons
www. VistaGeoScience.com
Area/
Point No.
Date
(2015)
Time
(00:00)
Even Interval
Depth (feet)
Odd Interval
Depth (feet)
Target
BOS
(lbs.)
Target
Water
(gal.)
Target Bac..
(ml)
Initial Press.
(psi)
Flow
Press. (psi)
Flow
Rate
(gpm)
Notes/Comments:
02/10/15 15:22 10 11 10 20 150 125
15:25 12 13 10 20 125 125
15;26 14 15 10 20 150 125
15:29 16 17 10 20 200 125
15;31 18 19 10 20 200 150
15:32 20 10 20 200 150
02/10/15 15:47 10 11 10 20 150 125
15:50 12 13 10 20 150 125
15:52 14 15 10 20 200 125
15;54 16 17 10 20 200 150
15:56 18 19 10 20 200 150
20
02/10/15 16:12 10 11 10 20 125 100
16:15 12 13 10 20 125 100
16:17 14 15 10 20 75 75
16:20 16 17 10 20 175 150
16:22 18 19 10 20 175 150
16:24 20 10 20 175 100
02/10/15 17:12 10 11 10 20 50 25
17:22 12 13 10 20 75 50
17:24 14 15 10 20 100 75
17:27 16 17 10 20 175 150
17:30 18 19 10 20 150 150
20
02/11/15 8:30 10 11 10 20 175 50
8:33 12 13 10 20 75 50
8:35 14 15 10 20 200 75
8:37 16 17 10 20 175 75
8:40 18 19 10 20 150 100
8:42 20 10 20 175 100
60 lbs 120 gallons
50 lbs 100 gallons
60 lbs 120 gallons
G-30
G-31
G-32
G-33
G-34
50 lbs 100 gallons
60 lbs 120 gallons
www. VistaGeoScience.com
Area/
Point No.
Date
(2015)
Time
(00:00)
Even Interval
Depth (feet)
Odd Interval
Depth (feet)
Target
BOS
(lbs.)
Target
Water
(gal.)
Target Bac..
(ml)
Initial Press.
(psi)
Flow
Press. (psi)
Flow
Rate
(gpm)
Notes/Comments:
02/11/15 8:57 10 11 10 20 100 75
9:01 12 13 10 20 200 75
9:03 14 15 10 20 100 75
9:06 16 17 10 20 175 75
9:13 18 19 10 20 175 75
20
02/11/15 9:36 10 11 10 20 100 75
9:38 12 13 10 20 100 75
9:40 14 15 10 20 110 75
9:42 16 17 10 20 150 75
9:44 18 19 10 20 200 75
9:46 20 10 20 200 100
02/11/15 9:58 10 11 10 20 100 50
10:00 12 13 10 20 75 50
10:05 14 15 10 20 100 75
10:08 16 17 10 20 200 100
10:10 18 19 10 20 175 75
20
02/11/15 10:26 10 11 10 20 125 100
10:30 12 13 10 20 100 100
10:35 14 15 10 20 50 100
10;37 16 17 10 20 150 100
10:39 18 19 10 20 150 125
10:41 20 10 20 200 150
02/11/15 11:03 10 11 10 10 100 50
11:05 12 13 10 10 100 50
11:10 14 15 10 10 100 50
11:19 16 17 10 10 100 50
11:21 18 19 10 10 100 50
20
B-7
G-35
G-16
G-15
G-14
50 lbs 100 gallons
60 lbs 120 gallons
50 lbs 100 gallons
60 lbs 120 gallons
50 lbs 50 gallons
www. VistaGeoScience.com
Area/
Point No.
Date
(2015)
Time
(00:00)
Even Interval
Depth (feet)
Odd Interval
Depth (feet)
Target
BOS
(lbs.)
Target
Water
(gal.)
Target Bac..
(ml)
Initial Press.
(psi)
Flow
Press. (psi)
Flow
Rate
(gpm)
Notes/Comments:
02/11/15 11:51 10 11 10 10 100 50
12:02 12 13 10 10 200 100
12:03 14 15 10 10 175 100
12:06 16 17 10 10 300 100
12:07 18 19 10 10 175 75
20
02/11/15 12:18 10 11 10 10 100 25
12:21 12 13 10 10 100 25
12:24 14 15 10 10 300 25
12:37 16 17 10 10 1000 200
12:40 18 19 10 10 200 150
12:42 20 10 10 150 100
02/11/15 13:05 10 11 10 10 100 50
13:07 12 13 10 10 200 50
13:10 14 15 10 10 200 50
13:30 16 17 10 10 200 50
13:32 18 19 10 10 175 50
20
02/11/15 13:51 10 11 10 10 500 100
13:52 12 13 10 10 150 50
13;54 14 15 10 10 200 100
13:57 16 17 10 10 800 100
14:00 18 19 10 10 300 50
14:02 20 10 10 200 100
02/11/15 14:20 10 11 10 10 100 100
14:24 12 13 10 10 400 100
14:35 14 15 10 10 200 100
14:49 16 17 10 10 200 100
14:51 18 19 10 10 250 150
20
B-1
B-8
B-9
B-10
B-11
50 lbs 50 gallons
60 lbs 60 gallons
50 lbs 50 gallons
Tool Clogged and repush
60 lbs 60 gallons
50 lbs 50 gallons
Tool clogged and repush
www. VistaGeoScience.com
Area/
Point No.
Date
(2015)
Time
(00:00)
Even Interval
Depth (feet)
Odd Interval
Depth (feet)
Target
BOS
(lbs.)
Target
Water
(gal.)
Target Bac..
(ml)
Initial Press.
(psi)
Flow
Press. (psi)
Flow
Rate
(gpm)
Notes/Comments:
02/11/15 15:06 10 11 10 10 200 75
15:09 12 13 10 10 1000 100
15:11 14 15 10 10 200 100
15:13 16 17 10 10 200 150
15:16 18 19 10 10 220 100
15:18 20 10 10 250 100
02/11/15 15:31 10 11 10 10 300 50
15;35 12 13 10 10 175 50
15:39 14 15
15:45 16 17 20 20 200 120
15:49 18 19 10 10 275 100
20
02/11/15 16:40 10 11 10 10 175 75
16:42 12 13 10 10 180 50
16:45 14 15 10 10 180 50
16:48 16 17 10 10 100 100
16:49 18 19 10 10 120 50
20
02/11/15 17:00 10 11 10 10 100 75
17:02 12 13 10 10 150 75
17:04 14 15 10 10 150 75
17:06 16 17 10 10 150 75
17:08 18 19 10 10 225 100
17:10 20 10 10 200 100
02/11/15 17:22 10 11 10 10 400 100
17:29 12 13 10 10 800 100
17:33 14 15 10 10 150 100
17:35 16 17 10 10 250 75
17:37 18 19 10 10 250 100
17:40 20 10 10 175 75
02/12/15 8:29 10 11 10 20 50 50
60 lbs 60 gallons
B-12
B-13
B-17
B-14
B-16
60 lbs 60 gallons
50 lbs 50 gallons
50 lbs 50 gallons
60 lbs 60 gallons
Tool Clogged and repush
Too much surfacing at old BH
2x Volume from 14' interval
www. VistaGeoScience.com
Area/
Point No.
Date
(2015)
Time
(00:00)
Even Interval
Depth (feet)
Odd Interval
Depth (feet)
Target
BOS
(lbs.)
Target
Water
(gal.)
Target Bac..
(ml)
Initial Press.
(psi)
Flow
Press. (psi)
Flow
Rate
(gpm)
Notes/Comments:
8:31 12 13 10 20 850 75
8:33 14 15 10 20 600 75
8:36 16 17 10 20 100 100
8:38 18 19 10 20 200 100
8:39 20 10 20 200 100
02/12/15 8:57 10 11 10 20 50 50
8:59 12 13 10 20 75 75
9:01 14 15 10 20 75 75
9:03 16 17 10 20 100 100
9:04 18 19 10 20 125 100
20
02/12/15 9:18 10 11 10 20 150 50
9:20 12 13 10 20 150 75
9:22 14 15 10 20 100 75
9:25 16 17 10 20 150 75
9:27 18 19 10 20 125 125
9:30 20 10 20 200 100
02/12/15 10:24 10 11 10 20 150 50
10:26 12 13 10 20 150 75
10;29 14 15 10 20 200 125
10:31 16 17 10 20 200 125
10:33 18 19 10 20 200 100
20
02/12/15 10:47 10 11 10 20 100 50
10:50 12 13 10 20 100 50
10:52 14 15 10 20 200 50
10:53 16 17 10 20 150 50
10:56 18 19 10 20 150 100
10:58 20 10 20 150 75
02/12/15 11:35 10 11 10 10 150 50
11:37 12 13 10 10 200 75
60 lbs 120 gallons
50 lbs 100 gallons
60 lbs 120 gallons
G-39
G-38
G-37
G-36
G-40
50 lbs 100 gallons
60 lbs 120 gallons
www. VistaGeoScience.com
Area/
Point No.
Date
(2015)
Time
(00:00)
Even Interval
Depth (feet)
Odd Interval
Depth (feet)
Target
BOS
(lbs.)
Target
Water
(gal.)
Target Bac..
(ml)
Initial Press.
(psi)
Flow
Press. (psi)
Flow
Rate
(gpm)
Notes/Comments:
11;39 14 15 10 10 200 100
11:41 16 17 10 10 200 50
11:42 18 19 10 10 275 75
11:44 20 10 10 300 75
02/12/15 11:56 10 11 10 10 175 75
12 13
14 15
16 17
18 19
20
02/12/15 12:16 10 11 10 10 200 75
12:18 12 13 10 10 175 50
12:20 14 15 10 10 175 50
12:22 16 17 10 10 200 75
12:23 18 19 10 10 300 125
12:25 20 10 10 200 125
02/12/15 12:41 10 11 10 10 200 50
12:43 12 13 10 10 100 50
12:45 14 15 10 10 200 75
12:47 16 17 10 10 200 75
12:49 18 19 10 10 300 100
20
02/12/15 13:07 10 11 10 10 175 50
13:10 12 13 10 10 600 75
13:11 14 15 10 10 200 75
13:15 16 17 10 10 200 100
13:17 18 19 10 10 250 100
13:19 20 10 10 200 100
02/12/15 13:47 10 11 12 20 100 50
13:49 12 13 12 20 100 50
13:51 14 15 12 20 175 50
Mixed 60 lbs
B-18
B-21
B-22
B-71
B-72
50 lbs 50 gallons
Surfacing;Moved to location B-21
60 lbs 60 gallons
60 lbs 60 gallons
10 lbs 10 gallons
60 lbs 60 gallons
www. VistaGeoScience.com
Area/
Point No.
Date
(2015)
Time
(00:00)
Even Interval
Depth (feet)
Odd Interval
Depth (feet)
Target
BOS
(lbs.)
Target
Water
(gal.)
Target Bac..
(ml)
Initial Press.
(psi)
Flow
Press. (psi)
Flow
Rate
(gpm)
Notes/Comments:
13:53 16 17 12 20 150 100
13:55 18 19 12 20 150 50
20
02/12/15 14:09 10 11 12 20 200 75
14:11 12 13 12 20 175 75
14:13 14 15 12 20 125 75
14:15 16 17 12 20 125 75
14:17 18 19 12 20 100 75
20
02/12/15 14:29 10 11 10 20 100 75
14:32 12 13 10 20 175 75
14:33 14 15 10 20 175 75
14:35 16 17 10 20 125 75
14:38 18 19 10 20 175 75
14:40 20 10 20 200 75
02/12/15 15:11 10 11 10 20 200 75
15:14 12 13 10 20 150 50
15:16 14 15 10 20 150 75
15:18 16 17 10 20 150 75
15:20 18 19 10 20 100 75
20
6,130 8,490 162.87 67.54
Mixed 60lbs
G-43
G-41
G-43
G-42
60 lbs 100 gallons
60 lbs 100 gallons
60 lbs 120 gallons
50 lbs 100 gallons
www. VistaGeoScience.com Page 1 of 4
Project No.: 14185 Site: City of Wheat Ridge Brownfield Inj. Tool:Page: ____________
Client: Terracon Crew:Date(s):
Address:7690 W. 38TH Ave. and 3790 Yukon Court Inj. Rig:Drill Rig:
Area B
Point No.
Date
(2014)
Time
(00:00)
Even
Interval
Depth
(feet)
Odd
Interval
Depth
(feet)
Target
BOS
(lbs.)
Target
Water
(gal.)
Initial
Press.
(psi)
Flow
Press.
(psi)
Flow
Rate
(gpm)
12/8/2014 12:15 12 13 20 20 400 250
12:50 14 15 20 20 175 175
12:55 16 17 20 20 175 175
12:59 18 19 20 20 175 175
20
12/8/2014 13:21 12 13 20 20 150 150
13:28 14 15 20 20 150 125
12:32 16 17 20 20 150 50
12:36 18 19 20 20 150 50
12:38 20 20 20 150 50
12/8/2014 14:05 12 13 20 20 125
14:10 14 15 20 20 125
14:24 16 17 20 20 125
14:30 18 19 20 20 125
203
BOS100/200 Injection Log
B
BOS-100
Notes/Comments:
80 lbs 80 gallon
Clogged tool, removed tool redrive rods
Start with water
100 lbs 100 gallons
1
2
80 lbs 80 gallon
N:\Projects\2014\25147073\Working Files\DRAFTS (Proposal-Reports-Communications)\CAP Completion Report\14185 Terracon BOS100 Injection Logs Complete_4 30 15.xls
www. VistaGeoScience.com Page 2 of 4
Area B
Point No.
Date
(2014)
Time
(00:00)
Even
Interval
Depth
(feet)
Odd
Interval
Depth
(feet)
Target
BOS
(lbs.)
Target
Water
(gal.)
Initial
Press.
(psi)
Flow
Press.
(psi)
Flow
Rate
(gpm)
Notes/Comments:
12/8/2014 14:45 12 13 20 20 125 125
14:48 14 15 20 20 125 125
14:53 16 17 20 20 125 125
14:58 18 19 20 20 100 100
15:02 20 20 20 100 100
12/8/2014 16:10 12 13 20 20 150 150
16:15 14 15 20 20 150 150
16:17 16 17 20 20 150 150
16:22 18 19 20 20 150 150
20
12/9/2014 8:35 12 13 20 20 0.25 0.25
8:40 14 15 20 20 125 125
8:45 16 17 20 20 100 100
8:50 18 19 20 20 100 100
8:55 20 20 20 100 100
12/9/2014 12:16 12 13 20 20 150 150
12:19 14 15 20 20 120 120
12:22 16 17 20 20 120 120
12:31 18 19 20 20 120 120
20
4
5
6
7
Start with high pressure water
100 lbs 100 gals
Clogged tip 900 PSI
80lbs 100 gals
100 lbs 100 gals
80 lb 80 gals
N:\Projects\2014\25147073\Working Files\DRAFTS (Proposal-Reports-Communications)\CAP Completion Report\14185 Terracon BOS100 Injection Logs Complete_4 30 15.xls
www. VistaGeoScience.com Page 3 of 4
Area B
Point No.
Date
(2014)
Time
(00:00)
Even
Interval
Depth
(feet)
Odd
Interval
Depth
(feet)
Target
BOS
(lbs.)
Target
Water
(gal.)
Initial
Press.
(psi)
Flow
Press.
(psi)
Flow
Rate
(gpm)
Notes/Comments:
12/9/2014 11:45 12 13 20 20 175 175
11:49 14 15 20 20 150 150
11:55 16 17 20 20 125 125
11:58 18 19 20 20 110 110
12:01 20 20 20 110 110
12/9/2014 11:24 12 13 20 20 150
11:27 14 15 20 20 150
11:29 16 17 20 20 150
11:34 18 19 20 20 125
20
12/9/2014 10:55 12 13 20 20 175 125
10:57 14 15 20 20 175 125
11:02 16 17 20 20 125 125
11:04 18 19 20 20 125 125
11:06 20 20 20 125 125
12/9/2014 9:58 12 13 20 20 150 150
10:00 14 15 20 20 150 150
10:05 16 17 20 20 150 150
10:08 18 19 20 20 125 125
10:10 20 20 20 125 125
8
9
10
11 20 lbs from 12
100 lbs 100 gal
100 lbs 110 gals
80 lbs 80 gals
100 lbs 100 gallons
N:\Projects\2014\25147073\Working Files\DRAFTS (Proposal-Reports-Communications)\CAP Completion Report\14185 Terracon BOS100 Injection Logs Complete_4 30 15.xls
www. VistaGeoScience.com Page 4 of 4
Area B
Point No.
Date
(2014)
Time
(00:00)
Even
Interval
Depth
(feet)
Odd
Interval
Depth
(feet)
Target
BOS
(lbs.)
Target
Water
(gal.)
Initial
Press.
(psi)
Flow
Press.
(psi)
Flow
Rate
(gpm)
Notes/Comments:
12/9/2014 9:10 12 20 20 175 175
9:28 14 20 20 175 175
9:34 16 20 20 150 150
9:38 18 20 20 150 150
9:43 20 20 20 1000 100
1,100 1,100 156.5 128.8
12
This was a point added to the area.
Plug tool pull rods
80 lbs 80 gal
N:\Projects\2014\25147073\Working Files\DRAFTS (Proposal-Reports-Communications)\CAP Completion Report\14185 Terracon BOS100 Injection Logs Complete_4 30 15.xls
www. VistaGeoScience.com Page 1 of 2
Project No.: 14185 Site: City of Wheat Ridge Brownfield AREA:Inj. Tool:Page: ____________
Client: Terracon Injected Product:Crew:Date(s):
Address:7690 W. 38TH Ave. and 3790 Yukon Court Injection Area:Inj. Rig:Drill Rig:
Area C
Point No.
Date
(2014)
Time
(00:00)
Even
Interval
Depth
(feet)
Odd
Interval
Depth
(feet)
Target
BOS
(lbs.)
Target
Water
(gal.)
Target
Bac..
(ml)
Initial
Press.
(psi)
Flow
Press.
(psi)
Flow
Rate
(gpm)
12/9/2014 13:02 8 9 20 20 120 120
13:05 10 11 20 20 120 120
13:09 12 13 20 20 120 120
13:12 14 15 20 20 120 120
13:20 16 17 20 20 150 150
13:25 18 19 20 20 150 150
20
12/9/2014 13:40 8 9 20 20 150 150
13:42 10 11 20 20 150 150
13:46 12 13 20 20 150 150
13:50 14 15 20 20 150 150
13:58 16 17 20 20 150 150
13:56 18 19 20 20 150 150
13:58 20 20 20 150 150
12/9/2014 14:21 8 9 20 20 150 150
14:26 10 11 20 20 150 150
14:30 12 13 20 20 150 150
14:35 14 15 20 20 150 150
14:35 16 17 20 20 150 150
14:41 18 19 20 20 150 150
20
12/9/2014 14:55 8 9 20 20 125 125
3
120 lbs 120 gallons
140 lbs 140 gals
120 lbs 120 gals
Notes/Comments:
1
2
BOS100/200 Injection Log
C
BOS-100
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Area C
Point No.
Date
(2014)
Time
(00:00)
Even
Interval
Depth
(feet)
Odd
Interval
Depth
(feet)
Target
BOS
(lbs.)
Target
Water
(gal.)
Target
Bac..
(ml)
Initial
Press.
(psi)
Flow
Press.
(psi)
Flow
Rate
(gpm)
Notes/Comments:
14:59 10 11 20 20 125 125
14:04 12 13 20 20 125 125
14:08 14 15 20 20 125 125
14:11 16 17 20 20 125 125
14:16 18 19 20 20 125 125
15:20 20 20 20 125 125
12/9/2014 15:40 8 9 20 20 150 150
14:23 10 11 20 20 150 150
14:45 12 13 20 20 50 50
15:48 14 15 20 20 50 50
15:52 16 17 20 20 150 150
15:55 18 19 20 20 150 150
20
640 640 134.5 134.5
4
5
120 lbs 120 gallon
140 lbs 140 gal
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Project No.: 14185 Site: City of Wheat Ridge Brownfield AREA:Inj. Tool:Page: ____________
Client: Terracon Injected Product:Crew:Date(s):
Address:7690 W. 38TH Ave. and 3790 Yukon Court Injection Area:Inj. Rig:Drill Rig:
Area D
Point No.
Date
(2014)
Time
(00:00)
Even
Interval
Depth
(feet)
Odd
Interval
Depth
(feet)
Target
BOS
(lbs.)
Target
Water
(gal.)
Target
Bac..
(ml)
Initial
Press.
(psi)
Flow
Press.
(psi)
Flow
Rate
(gpm)
12/10/14 11:14 8 9 10 20 150 150
11:15 10 11 10 20 150 150
11:18 12 13 10 20 75 75
11:20 14 15 10 20 75 75
11:23 16 17 10 20 75 75
11:26 18 19 10 20 75 75
11:30 20 10 20 75 75
12/10/14 11:54 8 9 10 20 100 100
11:57 10 11 10 20 100 100
11:59 12 13 10 20 100 100
12:03 14 15 10 20 100 100
12:05 16 17 10 20 100 100
18 19 10 20 100 100
20
12/10/14 12:46 8 9 10 20 100 100
14:50 10 11 10 20 100 100
14:54 12 13 10 20 100 100
14:58 14 15 10 20 100 100
13:10 16 17 10 20 100 100
13:03 18 19 10 20 100 100
13:05 20 10 20 100
12/10/14 13:10 8 9 10 20 100
Notes/Comments:
1
2
3
140 gals 70 lbs
120 gals 60 lbs
140 gals 70 lbs
BOS100/200 Injection Log
D
BOS-100
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Area D
Point No.
Date
(2014)
Time
(00:00)
Even
Interval
Depth
(feet)
Odd
Interval
Depth
(feet)
Target
BOS
(lbs.)
Target
Water
(gal.)
Target
Bac..
(ml)
Initial
Press.
(psi)
Flow
Press.
(psi)
Flow
Rate
(gpm)
Notes/Comments:
13:12 10 11 10 20 100
13:15 12 13 10 20 100
13:18 14 15 10 20 100
13:20 16 17 10 20 100
13:22 18 19 10 20 100
20
12/10/14 13:35 8 9 10 20 100
13:39 10 11 10 20 100
13:41 12 13 10 20 100
13:43 14 15 10 20 100
13:45 16 17 10 20 100
13:49 18 19 10 20 100
13:51 20 10 20 100
12/10/14 14:04 8 9 10 20 100
14:07 10 11 10 20 100
14:09 12 13 10 20 100
14:11 14 15 10 20 100
14:15 16 17 10 20 100
14:19 18 19 10 20 100
20
12/10/14 14:30 8 9 10 20 100
14:32 10 11 10 20 100
14:35 12 13 8 16 100
14:48 14 15 0 0 100
14:51 16 17 0 0 100
14:54 18 19 0 0 100
14:54 20 0 0 100
12/10/14 15:10 8 9 10 20 100
15:15 10 11 10 20 100
120 gals 60 lbs
Surfacing, Tip clogged
Pull rods go to next interval
7
Surfacing
6
4
5
120 gals 60 lbs
140 gals 70 lbs
Surfacing
Surfacing
Surfacing
56 gals 25 lbs
Surfacing
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Area D
Point No.
Date
(2014)
Time
(00:00)
Even
Interval
Depth
(feet)
Odd
Interval
Depth
(feet)
Target
BOS
(lbs.)
Target
Water
(gal.)
Target
Bac..
(ml)
Initial
Press.
(psi)
Flow
Press.
(psi)
Flow
Rate
(gpm)
Notes/Comments:
15:20 12 13 10 20 100
15:24 14 15 10 20 100
15:30 16 17 5 10 100
15:35 18 19 0 0 100
20
12/10/14 15:51 8 9 10 20 100
15:52 10 11 10 20 100
15:55 12 13 10 20 100
15:58 14 15 10 20 100
16:00 16 17 10 20 100
16:05 18 19 10 20 100
16:10 20 10 20 100
12/11/14 8:35 8 9 10 20 100
8:38 10 11 10 20 100
8:41 12 13 10 20 100
8:44 14 15 10 20 100
8:48 16 17 10 20 100
8:52 18 19 10 20 125
20
12/11/14 9:05 8 9 10 20 100
9:08 10 11 10 20 100
9:10 12 13 10 20 100
9:12 14 15 10 20 100
9:14 16 17 10 20 100
9:18 18 19 10 20 100
20 10 20
12/11/14 9:35 8 9 10 20 100
9:37 10 11 10 20 100
9:39 12 13 10 20 100
9
10
11
8
Surfacing
90 gallons 95 lbs
140 gals 70 lbs
120 gals 60 lbs
Changed Tip
140 gallons 70 lbs
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Area D
Point No.
Date
(2014)
Time
(00:00)
Even
Interval
Depth
(feet)
Odd
Interval
Depth
(feet)
Target
BOS
(lbs.)
Target
Water
(gal.)
Target
Bac..
(ml)
Initial
Press.
(psi)
Flow
Press.
(psi)
Flow
Rate
(gpm)
Notes/Comments:
9:42 14 15 10 20 100
9:46 16 17 10 20 75
9:50 18 19 10 20 100
20
12/11/14 10:04 8 9 10 20 100
10:06 10 11 10 20 100
10:08 12 13 10 20 100
10:10 14 15 10 20 100
10:12 16 17 10 20 100
10:14 18 19 10 20 100
10:18 20 10 20 100
12/11/14 10:29 8 9 10 20 100
10:32 10 11 10 20 100
10:40 12 13 10 20 100
10:44 14 15 10 20 100
10:46 16 17 10 20 100
10:49 18 19 10 20 100
20
12/11/14 10:55 8 9 10 20 100
10:57 10 11 10 20 100
11:00 12 13 10 20 100
11:03 14 15 10 20 100
11:05 16 17 10 20 100
11:07 18 19 10 20 100
11:10 20 10 20 100
12/11/14 11:21 8 9 10 20 100
11:24 10 11 10 20 100
11:25 12 13 10 20 100
11:27 14 15 10 20 100
13
14
15
16
12
Surface at last 5 gallons
120 gallon, 60 lbs
140 gallons 70 lbs
120 gallons 60 lbs
140 gallons 70 lbs
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Area D
Point No.
Date
(2014)
Time
(00:00)
Even
Interval
Depth
(feet)
Odd
Interval
Depth
(feet)
Target
BOS
(lbs.)
Target
Water
(gal.)
Target
Bac..
(ml)
Initial
Press.
(psi)
Flow
Press.
(psi)
Flow
Rate
(gpm)
Notes/Comments:
11:29 16 17 10 20 100
11:32 18 19 10 20 100
20
12/11/14 11:41 8 9 10 20 100
11:45 10 11 10 20 100
11:47 12 13 10 20 100
11:49 14 15 10 20 100
11:53 16 17 10 20 100
11:56 18 19 10 20 100
11:59 20 10 20 100
12/11/14 12:21 8 9 10 20 100
12:25 10 11 10 20 100
12:28 12 13 10 20 100
12:31 14 15 10 20 100
12:33 16 17 10 20 100
12:36 18 19 10 20 100
20
12/11/14 12:46 8 9 10 20 100
12:48 10 11 10 20 100
12:50 12 13 10 20 100
12:52 14 15 10 20 100
12:55 16 17 10 20 100
12:57 18 19 10 20 100
13:02 20 10 20 100
12/11/14 13:14 8 9 10 20 100
13:15 10 11 10 20 100
13:17 12 13 10 20 100
13:19 14 15 10 20 100
13:23 16 17 10 20 100
19
20
16
17
18
120 gals 60 lbs
140 gals 70 lbs
Surfacing
140 gals 70 lbs
140 gals 70 lbs
Surfacing
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Area D
Point No.
Date
(2014)
Time
(00:00)
Even
Interval
Depth
(feet)
Odd
Interval
Depth
(feet)
Target
BOS
(lbs.)
Target
Water
(gal.)
Target
Bac..
(ml)
Initial
Press.
(psi)
Flow
Press.
(psi)
Flow
Rate
(gpm)
Notes/Comments:
13:26 18 19 10 20 100
20
12/11/14 13:35 8 9 10 20 100
13:38 10 11 10 20 100
13:40 12 13 10 20 100
13:42 14 15 10 20 100
13:44 16 17 10 20 100
13:48 18 19 10 20 100
13:49 20 10 20 100
12/11/14 14:08 8 9 10 20 100
14:11 10 11 10 20 100
14:15 12 13 10 20 100
14:18 14 15 10 20 100
14:22 16 17 10 20 100
14:29 18 19 10 20 100
20
12/11/14 14:35 8 9 10 20 100
14:36 10 11 10 20 100
14:38 12 13 10 20 100
14:40 14 15 10 20 100
14:42 16 17 10 20 100
14:43 18 19 10 20 100
14:45 20 10 20 100
12/11/14 14:59 8 9 10 20 100
15:01 10 11 10 20 100
15:03 12 13 10 20 100
15:05 14 15 10 20 100
15:08 16 17 10 20 100
15:10 18 19 10 20 100
21
22
23
24
120 gallons 60 lbs
140 gallons 70 lbs
140 gals 70 lbs
120 gals 60 lbs
120 gals 60 lbs
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Area D
Point No.
Date
(2014)
Time
(00:00)
Even
Interval
Depth
(feet)
Odd
Interval
Depth
(feet)
Target
BOS
(lbs.)
Target
Water
(gal.)
Target
Bac..
(ml)
Initial
Press.
(psi)
Flow
Press.
(psi)
Flow
Rate
(gpm)
Notes/Comments:
20
12/11/14 15:40 8 9 10 20 100
15:43 10 11 10 20 100
15:45 12 13 10 20 100
15:46 14 15 10 20 100
15:47 16 17 10 20 100
15:50 18 19 10 20 100
15:52 20 10 20 100
12/11/14 16:08 8 9 10 20 100
16:09 10 11 10 20 100
16:10 12 13 10 20 100
16:15 14 15 10 20 100
16:18 16 17 10 20 100
16:21 18 19 10 20 100
20
12/12/14 8:50 8 9 10 20 100
8:52 10 11 10 20 100
8:54 12 13 10 20 100
9:00 14 15 10 20 100
9:02 16 17 10 20 100
9:04 18 19 10 20 100
9:06 20 10 20 100
12/12/14 9:15 8 9 10 20 100
9:16 10 11 10 20 100
9:18 12 13 10 20 100
9:20 14 15 10 20 100
9:23 16 17 10 20 100
9:25 18 19 10 20 100
20
25
26
27
28
140 gal 70 lbs
Replaced shear tip
120 gallons 60 lbs
140 gals 70 lbs
120 gals 60 lbs
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Area D
Point No.
Date
(2014)
Time
(00:00)
Even
Interval
Depth
(feet)
Odd
Interval
Depth
(feet)
Target
BOS
(lbs.)
Target
Water
(gal.)
Target
Bac..
(ml)
Initial
Press.
(psi)
Flow
Press.
(psi)
Flow
Rate
(gpm)
Notes/Comments:
12/12/14 9:59 8 9 10 20 100
10:02 10 11 10 20 100
10:04 12 13 10 20 100
10:06 14 15 10 20 100
10:08 16 17 10 20 100
10:10 18 19 10 20 100
10:12 20 10 20 100
12/12/14 10:20 8 9 10 20 100
10:22 10 11 10 20 100
12 13 10 20 100
14 15 10 20 100
16 17 10 20 100
10:36 18 19 10 20 100
20
12/12/14 11:03 8 9 10 20 125
10 11 10 20 250
12 13 10 20 150
14 15 10 20 125
16 17 10 20 125
18 19 10 20 125
11:15 20 10 20 125
12/12/14 11:25 8 9 10 20 100
11:27 10 11 10 20 100
11:29 12 13 10 20 100
11:33 14 15 10 20 100
11:34 16 17 10 20 100
11:36 18 19 10 20 100
20
29
30
31
32
140 gallons 70 lbs
120 gallons 60 lbs
140 gallons 70 lbs
Pump Manifold Clogged
120 gallons 60 lbs
Clogged Tool
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Area D
Point No.
Date
(2014)
Time
(00:00)
Even
Interval
Depth
(feet)
Odd
Interval
Depth
(feet)
Target
BOS
(lbs.)
Target
Water
(gal.)
Target
Bac..
(ml)
Initial
Press.
(psi)
Flow
Press.
(psi)
Flow
Rate
(gpm)
Notes/Comments:
12/12/14 11:45 8 9 10 20 100
11:47 10 11 10 20 100
11:49 12 13 10 20 100
11:53 14 15 10 20 100
11:55 16 17 10 20 100
11:57 18 19 10 20 100
11:59 20 10 20 100
12/12/14 12:13 8 9 10 20 100
12:20 10 11 10 20 100
12:23 12 13 10 20 75
12:25 14 15 10 20 75
12:28 16 17 10 20 100
12:31 18 19 10 20 100
12:33 20 10 20 100
12/12/14 13:35 8 9 10 20 100
13:37 10 11 10 20 100
13:38 12 13 10 20 100
13:40 14 15 10 20 100
13:42 16 17 10 20 100
13:40 18 19 10 20 100
13:45 20 10 20 100
12/12/14 13:58 8 9 10 20 100
14:01 10 11 10 20 100
14:05 12 13 10 20 100
14:06 14 15 10 20 100
14:08 16 17 10 20 100
14:10 18 19 10 20 100
20
35
33
34
36
140 gallons 70 lbs
Clogged tool
140 gal 70 lbs
120 gallons 60 lbs
140 gallons 70 lbs
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Area D
Point No.
Date
(2014)
Time
(00:00)
Even
Interval
Depth
(feet)
Odd
Interval
Depth
(feet)
Target
BOS
(lbs.)
Target
Water
(gal.)
Target
Bac..
(ml)
Initial
Press.
(psi)
Flow
Press.
(psi)
Flow
Rate
(gpm)
Notes/Comments:
12/12/14 14:25 8 9 10 20 100
14:27 10 11 10 20 100
14:29 12 13 10 20 100
14:33 14 15 10 20 100
14:38 16 17 10 20 100
14:41 18 19 10 20 100
14:44 20 10 20 100
12/12/14 15:04 8 9 10 20 100
15:05 10 11 10 20 100
15:08 12 13 10 20 100
15:10 14 15 10 20 100
15:15 16 17 10 20 100
15:18 18 19 10 20 100
20
12/12/14 15:38 8 9 10 20 100
15:41 10 11 10 20 100
15:44 12 13 10 20 100
15:48 14 15 10 20 100
15:50 16 17 10 20 100
15:52 18 19 10 20 100
20
12/12/14 16:10 8 9 10 20 100
16:08 10 11 10 20 100
16:15 12 13 10 20 100
16:18 14 15 10 20 100
16:21 16 17 10 20 100
16:24 18 19 10 20 100
16:30 20 10 20 100
12/15/14 8:23 8 9 10 20 75
38
39
40
37
140 gallons 70 lbs
Surfaced, lost 10 gallons
100 gallons 60 lbs
120 gallons 60 lbs
140 gallons 70 lbs
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Area D
Point No.
Date
(2014)
Time
(00:00)
Even
Interval
Depth
(feet)
Odd
Interval
Depth
(feet)
Target
BOS
(lbs.)
Target
Water
(gal.)
Target
Bac..
(ml)
Initial
Press.
(psi)
Flow
Press.
(psi)
Flow
Rate
(gpm)
Notes/Comments:
8:25 10 11 10 20 75
8:27 12 13 10 20 75
8:29 14 15 10 20 75
8:32 16 17 10 20 75
9:31 18 19 10 20 75
20
12/15/14 8:40 8 9 10 20 100
8:45 10 11 10 20 100
8:47 12 13 10 20 100
8:49 14 15 10 20 100
8:43 16 17 10 20 100
8:54 18 19 10 20 100
8:58 20 10 20 100
12/15/14 9:05 8 9 10 20 100
9:08 10 11 10 20 100
9:09 12 13 10 20 100
9:10 14 15 10 20 100
9:12 16 17 10 20 100
9:14 18 19 10 20 100
20
12/15/14 9:29 8 9 10 20 100
9:31 10 11 10 20 100
9:32 12 13 10 20 100
9:34 14 15 10 20 100
9:35 16 17 10 20 100
9:37 18 19 10 20 100
9:39 20 10 20 100
12/15/14 9:49 8 9 10 20 100
9:50 10 11 10 20 100
44
41
42
43
120 gallons 60 lbs
140 gal 70 lbs
Small amount of surfacing
Surfacing
120 gallons 60 lbs
140 gallons 70lbs
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Area D
Point No.
Date
(2014)
Time
(00:00)
Even
Interval
Depth
(feet)
Odd
Interval
Depth
(feet)
Target
BOS
(lbs.)
Target
Water
(gal.)
Target
Bac..
(ml)
Initial
Press.
(psi)
Flow
Press.
(psi)
Flow
Rate
(gpm)
Notes/Comments:
9:53 12 13 10 20 100
9:54 14 15 10 20 100
9:55 16 17 10 20 100
9:56 18 19 10 20 100
20
12/15/14 10:09 8 9 10 20 100
10:11 10 11 10 20 100
10:13 12 13 10 20 100
10:15 14 15 10 20 100
10:17 16 17 10 20 100
10:19 18 19 10 20 100
20
12/15/14 10:35 8 9 10 20 100
10:36 10 11 10 20 100
10:37 12 13 10 20 100
10:39 14 15 10 20 100
10:41 16 17 10 20 100
10:43 18 19 10 20 100
10:45 20 10 20 100
3,003 6,006 100.3
45
46
47
140 gallons 70 lbs
120 gallons 60 lbs
140 gallons 70 lbs
N:\Projects\2014\25147073\Working Files\DRAFTS (Proposal-Reports-Communications)\CAP Completion Report\14185 Terracon BOS100 Injection Logs Complete_4 30 15.xls
Table 3
Detected Constituents in Soil
Wheat Ridge Brownfield Remediation
7690 West 38th Avenue
Wheat Ridge, Colorado
Terracon Project Number 25147073
Sample ID and Depth N (5') N (7') N (9') S (5') S (7') S (9') SE 2 (5')SE (5')2 SE (7') SE (9') E (5') E (7') E (9')
Temp-1 (5-
9')
Temp-2 (5-
7.5')
Temp-3 (5-
7)
Collection Date 12/18/2014 12/18/2014 12/18/2014 12/18/2014 12/18/2014 12/18/2014 12/19/2014 12/18/2014 12/18/2014 12/18/2014 12/18/2014 12/18/2014 12/18/2014 6/22/2018 6/22/2018 6/22/2018
Parameter1 Residential
RSL
Industrial
RSL
CDPHE
GPV mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg
cis-1,2-
Dichloroethene 160 2,300 0.261 <0.005 <0.005 <0.005 <0.005 <0.005 0.0211 <0.005 0.0173 0.014 0.0653 <0.005 <0.005 0.0215 <0.0025 <0.0025 <0.0025
Tetrachloroethene 24 100 1.9 0.144 0.447 1.06 0.947 0.362 0.461 0.0157 2.42 0.489 1.26 0.137 0.235 1.12 <0.0025 0.00457 <0.0025
Trichloroethene 0.94 6.0 0.68 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 0.013 <0.005 0.0175 <0.005 <0.005 0.00786 <0.001 <0.001 <0.001
Notes:
1 Only detected analytes shown (detected concentrations are bold).
2 Additional excavation was conducted on the southeast corner of the main excavtion area based on the analytical results for soil sample SE(5'). Soil sample SE2 (5') was collected after additional excvation in the area.
CDPHE GPV = Colorado Department of Public Health and Environment Groundwater Protection Value (March 2014)
mg/kg = milligram per kilogram
RSL = EPA Regional Screening Level (June 2017)
25147073 Tables: Table 3 Page 1 of 1
2/1/2019
Table 4
Groundwater Level Measurements and Survey Data
Wheat Ridge Brownfield Remedation
7690 West 38th Avenue
Wheat Ridge, Colorado
Terracon Project Number 25147073
Monitoring Well ID Date
Top of Casing
Elevation1
Depth to Water
(TOC)
Groundwater
Elevation
9/9/2013 5448.21 10.26 5437.95
9/13/2013 5448.21 11.02 5437.19
3/18/2015 5448.21 10.61 5437.60
7/31/2015 5448.21 9.30 5438.91
10/28/2015 5448.21 10.02 5438.19
2/10/2016 5448.21 10.42 5437.79
5/17/2016 5448.21 9.21 5439.00
8/19/2016 5448.21 9.92 5438.29
11/16/2016 5448.21 11.13 5437.08
4/5/2017 5448.21 11.57 5436.64
6/29/2017 5448.21 10.76 5437.45
9/25/2017 5448.21 11.03 5437.18
11/9/2017 5448.21 10.98 5437.23
11/16/2017 5448.21 11.04 5437.17
12/1/2017 5448.21 11.21 5437.00
12/29/2017 5448.21 11.37 5436.84
1/31/2018 5448.21 11.56 5436.65
3/29/2018 5448.21 11.54 5436.67
1/21/2019
9/9/2013 5447.96 10.43 5437.53
9/13/2013 5447.96 11.01 5436.95
3/18/2015 5447.96 10.81 5437.15
7/31/2015 5447.96 9.44 5438.52
10/28/2015 5447.96 10.21 5437.75
2/10/2016 5447.96 10.58 5437.38
5/17/2016 5447.96 9.36 5438.60
8/19/2016 5447.96 10.49 5437.47
11/16/2016 5447.96 11.29 5436.67
4/5/2017 5447.96 11.65 5436.31
6/29/2017 5447.96 10.88 5437.08
9/25/2017 5447.96 11.20 5436.76
11/9/2017 5447.96 11.14 5436.82
11/16/2017 5447.96 11.22 5436.74
12/1/2017 5447.96 11.40 5436.56
12/29/2017 5447.96 11.54 5436.42
1/31/2018 5447.96 11.74 5436.22
3/29/2018 5447.96 11.71 5436.25
6/22/2018 5447.96 11.18 5436.78
9/24/2018 5447.96 11.89 5436.07
12/20/2018 5447.96 12.24 5435.72
1/21/2019 5447.96 13.12 5434.84
MW-01
MW-02
Well Not Sampled
25147073 Tables: Table 4
Page 1 of 5
2/1/2019
Table 4
Groundwater Level Measurements and Survey Data
Wheat Ridge Brownfield Remedation
7690 West 38th Avenue
Wheat Ridge, Colorado
Terracon Project Number 25147073
Monitoring Well ID Date
Top of Casing
Elevation1
Depth to Water
(TOC)
Groundwater
Elevation
9/9/2013 5447.58 11.27 5436.31
9/13/2013 5447.58 11.32 5436.26
3/18/2015 5447.58 10.65 5436.93
7/31/2015 5447.58 9.38 5438.20
10/28/2015 5447.58 10.10 5437.48
2/10/2016 5447.58 10.51 5437.07
5/17/2016 5447.58 9.13 5438.45
8/19/2016 5447.58 10.21 5437.37
11/16/2016 5447.58 11.21 5436.37
4/5/2017 5447.58 11.56 5436.02
6/29/2017 5447.58 10.90 5436.68
9/25/2017 5447.58 11.22 5436.36
11/9/2017 5447.58 11.10 5436.48
11/16/2017 5447.58 11.15 5436.43
12/1/2017 5447.58 11.29 5436.29
12/29/2017 5447.58 11.45 5436.13
1/31/2018 5447.58 11.66 5435.92
3/29/2018 5447.58 11.60 5435.98
1/21/2019
3/18/2015 5449.48 9.12 5440.36
7/31/2015 5449.48 7.89 5441.59
10/28/2015 5449.48 8.72 5440.76
2/10/2016 5449.48 9.06 5440.42
5/17/2016 5449.48 7.92 5441.56
8/19/2016 5449.48 8.97 5440.51
11/16/2016 5449.48 9.93 5439.55
4/5/2017 5449.48 10.11 5439.37
6/29/2017 5449.48 9.47 5440.01
9/25/2017 5449.48 9.68 5439.80
11/9/2017 5449.48 9.60 5439.88
11/16/2017 5449.48 9.63 5439.85
12/1/2017 5449.48 9.81 5439.67
12/29/2017 5449.48 10.00 5439.48
1/31/2018 5449.48 10.21 5439.27
3/29/2018 5449.48 10.00 5439.48
6/22/2018 5449.48 9.52 5439.96
9/24/2018 5449.48 10.31 5439.17
12/20/2018 5449.48 10.86 5438.62
1/21/2019 5449.48 12.56 5436.92
MW-03
MW-04
Well Not Sampled
25147073 Tables: Table 4
Page 2 of 5
2/1/2019
Table 4
Groundwater Level Measurements and Survey Data
Wheat Ridge Brownfield Remedation
7690 West 38th Avenue
Wheat Ridge, Colorado
Terracon Project Number 25147073
Monitoring Well ID Date
Top of Casing
Elevation1
Depth to Water
(TOC)
Groundwater
Elevation
3/18/2015 5448.48 9.07 5439.41
7/31/2015 5448.48 8.87 5439.61
10/28/2015 5448.48 8.04 5440.44
2/10/2016 5448.48 9.01 5439.47
5/17/2016 5448.48 8.11 5440.37
8/19/2016 5448.48 8.88 5439.60
11/16/2016 5448.48 9.78 5438.70
4/5/2017 5448.48 10.14 5438.34
6/29/2017 5448.48 9.90 5438.58
9/25/2017 5448.48 9.25 5439.23
11/9/2017 5448.48 9.35 5439.13
11/16/2017 5448.48 9.64 5438.84
12/1/2017 5448.48 9.72 5438.76
12/29/2017 5448.48 9.85 5438.63
1/31/2018 5448.48 10.09 5438.39
3/29/2018 5448.48 9.65 5438.83
6/22/2018 5448.48 9.46 5439.02
9/24/2018 5448.48 10.28 5438.20
12/20/2018 5448.48 10.69 5437.79
1/21/2019 5448.48 12.61 5432.19
3/18/2015 5448.46 9.15 5439.31
7/31/2015 5448.46 7.92 5440.54
10/28/2015 5448.46 8.67 5439.79
2/10/2016 5448.46 9.03 5439.43
5/17/2016 5448.46 9.12 5439.34
8/19/2016 5448.46 8.92 5439.54
11/16/2016 5448.46 9.91 5438.55
4/5/2017 5448.46 10.10 5438.36
6/29/2017 5448.46 9.49 5438.97
9/25/2017 5448.46 9.60 5438.86
11/9/2017 5448.46 9.61 5438.85
11/16/2017 5448.46 9.71 5438.75
12/1/2017 5448.46 9.83 5438.63
12/29/2017 5448.46 9.87 5438.59
1/31/2018 5448.46 10.15 5438.31
3/29/2018
3/29/2018
10/10/2018 NA 12.14 NA
12/20/2018 NA 10.07 NA
1/21/2019 NA 12.56 NA
MW-6R
MW-05
Destroyed
Well Not Sampled
MW-06
25147073 Tables: Table 4
Page 3 of 5
2/1/2019
Table 4
Groundwater Level Measurements and Survey Data
Wheat Ridge Brownfield Remedation
7690 West 38th Avenue
Wheat Ridge, Colorado
Terracon Project Number 25147073
Monitoring Well ID Date
Top of Casing
Elevation1
Depth to Water
(TOC)
Groundwater
Elevation
3/18/2015 5449.73 8.82 5440.91
7/31/2015 5449.73 7.61 5442.12
10/28/2015 5449.73 8.35 5441.38
2/10/2016 5449.73 8.75 5440.98
5/17/2016 5449.73 7.84 5441.89
8/19/2016 5449.73 8.33 5441.40
11/16/2016 5449.73 9.58 5440.15
4/5/2017 5449.73 9.86 5439.87
6/29/2017 5449.73 9.25 5440.48
9/25/2017 5449.73 9.36 5440.37
11/9/2017 5449.73 9.24 5440.49
11/16/2017 5449.73 9.35 5440.38
12/1/2017 5449.73 9.47 5440.26
12/29/2017 5449.73 9.65 5440.08
1/31/2018 5449.73 9.89 5439.84
3/29/2018 5449.73 9.72 5440.01
1/21/2019 5449.73 10.42 5439.31
3/18/2015 5450.61 8.91 5441.70
7/31/2015 5450.61 7.76 5442.85
10/28/2015 5450.61 8.45 5442.16
2/10/2016 5450.61 8.89 5441.72
5/17/2016 5450.61 7.76 5442.85
8/19/2016 5450.61 8.71 5441.90
11/16/2016 5450.61 9.62 5440.99
4/5/2017 5450.61 9.89 5440.72
6/29/2017 5450.61 9.34 5441.27
9/25/2017 5450.61 9.52 5441.09
12/29/2017 5450.61 9.29 5441.32
3/29/2018 5450.61 9.84 5440.77
6/22/2018 5450.61 9.34 5441.27
9/24/2018 5450.61 10.15 5440.46
12/20/2018 5450.61 10.61 5440.00
1/21/2019 5450.61 10.56 5440.05
MW-07
MW-08
25147073 Tables: Table 4
Page 4 of 5
2/1/2019
Table 4
Groundwater Level Measurements and Survey Data
Wheat Ridge Brownfield Remedation
7690 West 38th Avenue
Wheat Ridge, Colorado
Terracon Project Number 25147073
Monitoring Well ID Date
Top of Casing
Elevation1
Depth to Water
(TOC)
Groundwater
Elevation
3/18/2015 5451.05 8.41 5442.64
7/31/2015 5451.05 7.32 5443.73
10/28/2015 5451.05 8.02 5443.03
2/10/2016 5451.05 NM NM
5/17/2016 5451.05 7.98 5443.07
8/19/2016 5451.05 8.41 5442.64
11/16/2016 5451.05 9.29 5441.76
4/5/2017 5451.05 9.55 5441.50
6/29/2017 5451.05 8.86 5442.19
9/25/2017 5451.05 9.05 5442.00
12/29/2017 5451.05 9.29 5441.76
3/29/2018 5451.05 9.42 5441.63
6/22/2018 5451.05 8.85 5442.20
9/24/2018 5451.05 9.80 5441.25
12/20/2018 5451.05 10.08 5440.97
1/21/2019 5451.05 10.20 5440.85
Notes:
1 Site datum (5450.0 feet) is the southwest corner of the cement pad of the electrical
transformer, on the North side of West 38th Avenue.
NM: Not measured
TOC : Top of Casing
MW-09
25147073 Tables: Table 4
Page 5 of 5
2/1/2019
Table 5
Groundwater Parameter Measurements
Wheat Ridge Brownfield Remediation
7690 West 38th Avenue
Wheat Ridge, Colorado
Terracon Project Number 25147073
Monitoring Well
ID Date Temperature (°C)
Specific
Conductance
(µS/cm)
Dissolved
Oxygen (mg/L)pH
Oxidation-
Reduction
Potential (mV)
Ethane
(ug/l)
Ethene
(ug/l)
Acetylene
(ug/l)
9/9/2013 21.97 --2.96 7.6 165.7 NS NS NS
9/13/2013 NS NS NS
3/18/2015 14.52 1004 0.38 7.22 198.0 NS NS NS
7/31/2015
10/28/2015
2/10/2016
5/17/2016
4/5/2017 12.41 1135 1.27 7.26 147.7 NS NS NS
6/29/2017
9/25/2017
11/9/2017 17.34 1042 1.53 7.18 59.2 <13.0 <13.0 < 20.8
11/16/2017 19.01 1058 1.6 7.18 124.2 <13.0 <13.0 < 20.8
12/1/2017 16.55 1047 1.77 7.25 76.6 NS NS NS
12/29/2017 17.08 1042 1.32 7.28 96.2 NS NS NS
1/31/2018 15.67 1043 1.48 7.19 41.5 NS NS NS
3/29/2018 14.98 1070 2.53 7.13 52.2 NS NS NS
1/21/2019
9/9/2013 19.82 1075 0.8 7.11 -431.9 NS NS NS
9/13/2013 NS NS NS
3/18/2015 14.42 1036 0.49 7.19 197.7 NS NS NS
7/31/2015 17.60 2059 1.77 6.92 91.2 NS NS NS
10/28/2015 17.56 1086 0.23 7.04 5.00 NS NS NS
2/10/2016 16.24 1141 1.33 7.17 67.5 NS NS NS
5/17/2016 12.98 1086 1.32 6.80 74.3 NS NS NS
8/19/2016 18.03 1097 1.89 7.43 58.0 NS NS NS
11/16/2016 16.70 1120 1.62 7.89 102.4 NS NS NS
4/5/2017 12.48 1213 1.70 7.14 204.4 NS NS NS
6/29/2017 16.21 1178 1.36 7.06 88.4 NS NS NS
9/25/2017 18.91 1154 1.81 6.96 176.5 NS NS NS
11/9/2017 17.35 1149 1.49 7.20 76.5 <13.0 <13.0 < 20.8
11/16/2017 17.14 1156 1.50 7.16 118.5 <13.0 <13.0 < 20.8
12/1/2017 16.48 1152 1.87 7.22 72.7 NS NS NS
12/29/2017 16.63 1153 0.94 7.21 74.9 NS NS NS
1/31/2018 15.35 1147 4.66 7.22 13.5 NS NS NS
3/29/2018 14.96 1170 2.03 7.10 141.0 NS NS NS
6/22/2018 15.39 1295 1.12 7.00 24.6 NS NS NS
9/24/2018 18.65 1229 1.15 6.69 -16.2 NS NS NS
12/20/2018 16.18 1208 0.83 6.79 99.3 NS NS NS
1/21/2019 15.33 1241 1.06 7.07 97.8 NS NS NS
Not measured
Not measured
MW-01
MW-02
Well not sampled
Well not sampled
Well not sampled
Well not sampled
Well not sampled
Well not sampled
Well not sampled
25147073 Tables: Table 5 Page 1 of 5
2/1/2019
Table 5
Groundwater Parameter Measurements
Wheat Ridge Brownfield Remediation
7690 West 38th Avenue
Wheat Ridge, Colorado
Terracon Project Number 25147073
Monitoring Well
ID Date Temperature (°C)
Specific
Conductance
(µS/cm)
Dissolved
Oxygen (mg/L)pH
Oxidation-
Reduction
Potential (mV)
Ethane
(ug/l)
Ethene
(ug/l)
Acetylene
(ug/l)
9/9/2013 19.0 1775 1.19 7.54 -335.6 NS NS NS
9/13/2013 NS NS NS
3/18/2015 13.93 964 1.61 7.10 192.2 NS NS NS
7/31/2015
10/28/2015
2/10/2016
5/17/2016
4/5/2017 12.8 1070 3.25 7.13 197.3 NS NS NS
6/29/2017
9/25/2017
11/9/2017 16.49 1553 0.88 6.93 223.8 <13.0 <13.0 < 20.8
11/16/2017 17.61 1270 1.04 7.02 109.4 <13.0 <13.0 < 20.8
12/1/2017 16.12 1122 1.5 7.11 93.6 NS NS NS
12/29/2017 15.67 1082 2.25 7.06 124.6 NS NS NS
1/31/2018 15.01 1068 2.39 7.14 25.6 NS NS NS
3/29/2018 14.33 950 2.03 7.15 124.5 NS NS NS
1/21/2019
3/18/2015 13.14 916 0.35 7.46 -67.5 NS NS NS
7/31/2015 15.30 1012 0.73 7.38 60.2 NS NS NS
10/28/2015 18.13 1136 0.32 7.38 9.9 NS NS NS
2/10/2016 13.51 1075 1.32 7.31 21.1 NS NS NS
5/17/2016 11.69 1056 1.64 7.29 85.8 NS NS NS
8/19/2016 16.49 1177 1.57 7.47 54.1 NS NS NS
11/16/2016 18.10 1140 2.13 7.95 80.2 NS NS NS
4/5/2017 13.44 1226 0.45 7.27 25.1 NS NS NS
6/29/2017 15.61 1197 1.04 7.61 -72.1 NS NS NS
9/25/2017 18.25 1171 0.98 7.25 46.6 NS NS NS
11/9/2017 16.70 1168 0.50 7.25 69.5 139 <13.0 <20.8
11/16/2017 17.52 1152 1.54 7.25 98.9 <13.0 <13.0 <20.8
12/1/2017 16.53 1163 1.61 7.30 113.1 66.6 <13.0 <20.8
12/29/2017 15.31 1169 0.97 7.30 23.6 15.1 <13.0 <20.8
1/31/2018 14.07 1190 2.75 7.30 3.0 91.3 <13.0 <20.8
3/29/2018 13.04 1228 1.65 7.31 -25.8 125 <13.0 <20.8
6/22/2018 13.95 1252 0.86 7.15 5.6 NS NS NS
9/24/2018 17.77 1230 1.03 7.39 -25.6 NS NS NS
12/20/2018 13.98 1231 9.20 7.10 100.1 NS NS NS
1/21/2019 14.60 1230 0.36 7.15 24.4 76.4 <13.0 <20.8
Not measured
Well not sampled
Well not sampled
Well not sampled
Well not sampled
Well not sampled
Well not sampled
Well not sampled
MW-03
MW-04
25147073 Tables: Table 5 Page 2 of 5
2/1/2019
Table 5
Groundwater Parameter Measurements
Wheat Ridge Brownfield Remediation
7690 West 38th Avenue
Wheat Ridge, Colorado
Terracon Project Number 25147073
Monitoring Well
ID Date Temperature (°C)
Specific
Conductance
(µS/cm)
Dissolved
Oxygen (mg/L)pH
Oxidation-
Reduction
Potential (mV)
Ethane
(ug/l)
Ethene
(ug/l)
Acetylene
(ug/l)
3/18/2015 13.69 1076 1.77 7.22 194.8 NS NS NS
7/31/2015 16.40 1088 0.32 7.11 132.7 NS NS NS
10/28/2015 17.90 1100 0.33 7.13 16.2 NS NS NS
2/10/2016 14.73 1068 1.72 7.10 83.5 NS NS NS
5/17/2016 12.15 1028 2.11 7.02 71.8 NS NS NS
8/19/2016 18.18 1043 2.51 7.40 55.4 NS NS NS
11/16/2016 18.34 1060 2.10 7.91 81.3 NS NS NS
4/5/2017 13.81 1181 1.20 7.03 171.9 NS NS NS
6/29/2017 16.94 1145 1.69 7.29 66.3 NS NS NS
9/25/2017 18.69 1116 1.52 7.16 142.1 NS NS NS
11/9/2017 16.60 1066 3.48 7.23 220.4 <13.0 <13.0 <20.8
11/16/2017 17.60 1072 4.41 7.25 130.8 <13.0 <13.0 <20.8
12/1/2017 16.91 1077 5.51 7.31 108.2 <13.0 <13.0 <20.8
12/29/2017 15.58 1089 4.15 7.32 65.9 <13.0 <13.0 <20.8
1/31/2018 13.89 1098 4.89 7.35 39.0 <13.0 <13.0 <20.8
3/29/2018 14.16 1103 3.60 7.35 36.4 <13.0 <13.0 <20.8
6/22/2018 13.92 974 2.30 7.17 42.8 NS NS NS
9/24/2018 16.67 1092 1.60 7.36 39.7 NS NS NS
12/20/2018 14.53 1113 3.26 7.20 114.3 NS NS NS
1/21/2019 13.84 1136 3.22 7.28 118.5 <13.0 <13.0 <20.8
3/18/2015 13.36 1063 0.36 7.17 217.1 NS NS NS
7/31/2015 16.40 1030 0.27 7.04 108.9 NS NS NS
10/28/2015 19.05 1022 0.34 7.15 16.9 NS NS NS
2/10/2016 18.10 1069 0.98 7.19 90.4 NS NS NS
5/17/2016 12.22 1016 2.15 7.11 76.4 NS NS NS
8/19/2016 19.21 1096 2.68 7.52 54.2 NS NS NS
11/16/2016 18.81 1096 2.08 7.86 52.8 <13.0 <13.0 <20.8
4/5/2017 14.24 1205 0.57 7.18 65.7 NS NS NS
6/29/2017 15.86 912 1.31 7.14 81.6 NS NS NS
9/25/2017 17.93 1155 1.30 7.12 146.2 NS NS NS
11/9/2017 16.65 1146 1.06 7.21 92.0 <13.0 <13.0 <20.8
11/16/2017 17.80 1120 1.30 7.11 132.0 NS NS NS
12/1/2017 16.57 1135 1.78 7.24 129.0 NS NS NS
12/29/2017 15.29 1140 1.03 7.16 144.0 NS NS NS
1/31/2018 13.80 1147 1.48 7.31 15.5 <13.0 <13.0 <20.8
3/29/2018 Monitoring well destroyed
MW-06
MW-05
25147073 Tables: Table 5 Page 3 of 5
2/1/2019
Table 5
Groundwater Parameter Measurements
Wheat Ridge Brownfield Remediation
7690 West 38th Avenue
Wheat Ridge, Colorado
Terracon Project Number 25147073
Monitoring Well
ID Date Temperature (°C)
Specific
Conductance
(µS/cm)
Dissolved
Oxygen (mg/L)pH
Oxidation-
Reduction
Potential (mV)
Ethane
(ug/l)
Ethene
(ug/l)
Acetylene
(ug/l)
10/10/2018 16.62 1167 2.89 6.84 -62.9 NS NS NS
12/20/2018 14.19 1155 0.82 7.04 125.1 NS NS NS
1/21/2019 13.92 1164 1.27 7.18 98.6 <13.0 <13.0 <20.8
3/18/2015 13.63 1032 0.40 7.26 206.9 NS NS NS
7/31/2015
10/28/2015
2/10/2016
5/17/2016
4/5/2017 14.26 1091 0.52 7.2 215.9 NS NS NS
6/29/2017
9/25/2017
11/9/2017 16.29 1028 0.67 7.25 215.7 <13.0 <13.0 < 20.8
11/16/2017 17.29 1041 1.67 7.26 109.7 <13.0 <13.0 < 20.8
12/1/2017 16.17 1038 2.12 7.29 90 NS NS NS
12/29/2017 15.3 1039 1.07 7.32 27 NS NS NS
1/31/2018 14.95 1038 1.47 7.31 15.5 NS NS NS
3/29/2018 14.67 1032 1.83 7.3 51.7 NS NS NS
1/21/2019 14.84 1104 <13.0 <13.0 <20.8
3/18/2015 13.33 940 0.43 7.31 75.5 NS NS NS
7/31/2015 14.50 1035 0.09 7.16 44.3 NS NS NS
10/28/2015 16.68 1124 0.29 7.25 10.2 NS NS NS
2/10/2016 14.26 1023 0.99 7.26 54.1 NS NS NS
5/17/2016 11.77 1051 2.59 7.30 86.8 NS NS NS
8/19/2016 16.67 1166 1.21 7.39 66.4 NS NS NS
11/16/2016 17.13 1156 2.01 7.96 60.5 NS NS NS
4/5/2017 13.41 1227 0.34 7.23 154.7 NS NS NS
6/29/2017 14.12 1218 1.02 7.35 15.2 NS NS NS
9/25/2017 16.81 1199 0.78 7.19 0.3 NS NS NS
3/29/2018 13.24 1224 1.78 7.13 61.6 NS NS NS
6/22/2018 14.44 1214 0.95 7.04 13.2 NS NS NS
9/24/2018 18.32 1235 1.65 7.19 38.2 NS NS NS
12/20/2018 14.64 1157 0.90 7.08 87.2 NS NS NS
1/21/2019 14.8 1204 0.30 7.12 75.9 70.8 <13.0 <20.8
Well not sampled
Well not sampled
Well not sampled
Well not sampled
Well not sampled
MW-08
Well not sampled
MW-07
MW-6R
25147073 Tables: Table 5 Page 4 of 5
2/1/2019
Table 5
Groundwater Parameter Measurements
Wheat Ridge Brownfield Remediation
7690 West 38th Avenue
Wheat Ridge, Colorado
Terracon Project Number 25147073
Monitoring Well
ID Date Temperature (°C)
Specific
Conductance
(µS/cm)
Dissolved
Oxygen (mg/L)pH
Oxidation-
Reduction
Potential (mV)
Ethane
(ug/l)
Ethene
(ug/l)
Acetylene
(ug/l)
3/18/2015 12.88 1061 0.44 7.15 216.3 NS NS NS
7/31/2015
10/28/2015
2/10/2016
5/17/2016
4/5/2017 13.84 1159 2.97 7.17 206 NS NS NS
6/29/2017 16.24 1183 1 7.37 60.5 NS NS NS
9/25/2017 17.75 1179 1.03 7.2 90.9 NS NS NS
3/29/2018 13.45 1158 2.03 7.15 70.5 NS NS NS
6/22/2018 15.22 1222 0.84 7.06 35.2 NS NS NS
9/24/2018 18.09 1254 1.98 7.06 55.6 NS NS NS
12/20/2018 14.35 1204 1.17 7.05 131.9 NS NS NS
1/21/2019 14.43 1212 1.34 7.12 79.54 <13.0 <13.0 <20.8
Notes:
° C : Degrees Celsius
µS/cm: microsiemens per centimeter
mg/L : milligrams per liter
mV: millivolts
µg/L: micrograms per liter
NS: Not sampled
Well not sampled
MW-09
Well not sampled
Well not sampled
Well not sampled
25147073 Tables: Table 5 Page 5 of 5
2/1/2019
Table 6
Detected Constituents in Groundwater
Wheat Ridge Brownfield Remediation
7690 West 38th Avenue
Wheat Ridge, Colorado
Terracon Project Number 25147073
PCE TCE cis-1,2-DCE
trans-1,2-
DCE VC
9/9/2013 6.3 <1.0 1.50 <1.0 <1.0
9/13/2013 5.2 <0.5 0.85 <0.5 <0.5
3/18/2015 3.5 <0.25 0.73 J <0.48 <0.45
4/5/2017 2.9 2.06 <1.0 <1.0 <1.0
11/9/2017 5.04 <1.0 <1.0 <1.0 <1.0
11/16/2017 6.73 <1.0 <1.0 <1.0 <1.0
12/1/2017 5.1 <1.0 <1.0 <1.0 <1.0
12/29/2017 2.97 <1.0 <1.0 <1.0 <1.0
1/31/2018 3.48 <1.0 <1.0 <1.0 <1.0
3/29/2018 2.56 <1.0 <1.0 <1.0 <1.0
9/6/2013 290 7.80 12.0 <1.0 4.30
9/13/2013 200 6.00 9.20 <2.5 2.70
3/18/2015 87.3 3.90 8.50 <0.48 2.30
7/31/2015 230 18.0 51.0 <0.48 3.60
10/28/2015 125 4.09 <1.0 <1.0 <1.0
2/10/2016 143 6.26 11.7 <1.0 <1.0
5/17/2016 67.5 2.31 3.05 <1.0 <1.0
8/19/2016 <1.0 <1.0
11/16/2016 43.2 1.77 5.13 <1.0 <1.0
4/5/2017 59.4 3.40 4.26 <1.0 <1.0
6/29/2017 71.5 2.84 2.92 <1.0 <1.0
9/25/2017 75.5 3.11 2.23 <1.0 <1.0
11/9/2017 50.4 1.55 1.85 <1.0 <1.0
11/16/2017 67.2 2.37 1.51 <1.0 <1.0
12/1/2017 37.7 1.46 1.55 <1.0 <1.0
12/29/2017 50 2.05 1.02 <1.0 <1.0
1/31/2018 49.8 1.91 1.02 <1.0 <1.0
3/29/2018 37.8 1.64 <1.0 <1.0 <1.0
6/25/2018 31.0 1.09 1.54 <1.0 <1.0
9/24/2018 91.0 3.63 1.14 <1.0 <1.0
12/20/2018 40.6 1.79 2.71 <1.0 <1.0
1/21/2019 41.3 1.79 <1.0 <1.0 <1.0
VOC (8260B) (µg/L)
Sample DateSample ID
MW-1
MW-2
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Table 6
Detected Constituents in Groundwater
Wheat Ridge Brownfield Remediation
7690 West 38th Avenue
Wheat Ridge, Colorado
Terracon Project Number 25147073
PCE TCE cis-1,2-DCE
trans-1,2-
DCE VC
VOC (8260B) (µg/L)
Sample DateSample ID
9/9/2013 4.9 <1.0 <1.0 <1.0 <1.0
9/13/2013 3.2 <0.5 <0.5 <0.5 <0.5
3/18/2015 3.3 0.47 J <0.31 <0.48 <0.45
4/5/2017 2.19 <1.0 <1.0 <1.0 <1.0
11/9/2017 3.49 <1.0 <1.0 <1.0 <1.0
11/16/2017 3.74 <1.0 <1.0 <1.0 <1.0
12/1/2017 2.77 <1.0 <1.0 <1.0 <1.0
12/29/2017 2.48 <1.0 <1.0 <1.0 <1.0
1/31/2018 3.14 <1.0 <1.0 <1.0 <1.0
3/29/2018 2.24 <1.0 <1.0 <1.0 <1.0
12/30/2014 1,490 31.5 300 3.51 10.4
3/18/2015 601 14.3 17.1 <0.48 0.64 J
7/31/2015 240 <0.25 8.80 <0.48 <0.45
10/28/2015 301 5.34 <1.0 <1.0 <1.0
2/10/2016 169 6.21 8.20 <1.0 <1.0
5/17/2016 136 5.45 3.08 <1.0 <1.0
8/19/2016 <1.0 <1.0 <1.0 <1.0 <1.0
11/16/2016 141 11.8 33.6 <1.0 <1.0
4/5/2017 141 12.4 17.9 <1.0 <1.0
6/29/2017 131 10.1 18.0 <1.0 <1.0
9/25/2017 103 8.83 14.9 <1.0 <1.0
11/9/2017 107 9.2 18.9 <1.0 <1.0
11/16/2017 103 9.02 13.3 <1.0 <1.0
12/1/2017 92 9.91 16.3 <1.0 <1.0
12/29/2017 84.3 7.68 10.4 <1.0 <1.0
1/31/2018 92.4 9.45 15.4 <1.0 <1.0
3/29/2018 69.3 8.11 15.4 <1.0 <1.0
6/25/2018 70.7 9.93 21.1 <1.0 <1.0
9/24/2018 97.0 10.9 18.6 <1.0 <1.0
12/20/2018 53.3 6.73 10.8 <1.0 <1.0
1/21/2019 48.8 6.13 10.9 <1.0 <1.0
MW-3
MW-4
25147073 Tables: Table 6
Page 2 of 5
2/1/2019
Table 6
Detected Constituents in Groundwater
Wheat Ridge Brownfield Remediation
7690 West 38th Avenue
Wheat Ridge, Colorado
Terracon Project Number 25147073
PCE TCE cis-1,2-DCE
trans-1,2-
DCE VC
VOC (8260B) (µg/L)
Sample DateSample ID
12/30/2014 25.4 2.55 13.6 <0.48 3.91
3/18/2015 197 18.2 116 0.86 J 26.9
7/31/2015 90 14.0 140 <0.48 7.50
10/28/2015 133 12.9 75.7 <1.0 5.43
2/10/2016 94.8 9.15 41.1 <1.0 <1.0
5/17/2016 67.4 6.31 36.7 <1.0 <1.0
8/19/2016 <1.0 <1.0 <1.0 <1.0 <1.0
11/16/2016 44.5 4.69 38.5 <1.0 <1.0
4/5/2017 27.0 3.36 34.5 <1.0 <1.0
6/29/2017 26.6 2.82 23.7 <1.0 <1.0
9/25/2017 21.3 2.35 24.6 <1.0 2.15
11/9/2017 15.8 1.86 24.4 <1.0 <1.0
11/16/2017 15.1 1.9 18.8 <1.0 <1.0
12/1/2017 12.6 1.67 20 <1.0 <1.0
12/29/2017 10.8 1.37 12.1 <1.0 <1.0
1/31/2018 10.8 1.25 9.93 <1.0 <1.0
3/29/2018 7.54 <1.0 7.72 <1.0 <1.0
6/25/2018 6.68 <1.0 6.4 <1.0 <1.0
9/24/2018 12.9 1.26 7.91 <1.0 <1.0
12/20/2018 8.08 <1.0 9.09 <1.0 <1.0
1/21/2019 5.67 <1.0 6.07 <1.0 <1.0
3/18/2015 71.7 5.00 32.2 <0.48 3.80
7/31/2015 15 <0.25 4.20 <0.48 <0.45
10/28/2015 6.9 <1.0 1.96 <1.0 <1.0
2/10/2016 18.7 <1.0 <1.0 <1.0 <1.0
5/17/2016 53.5 3.24 11.1 <1.0 <1.0
8/19/2016 <1.0 <1.0 <1.0 <1.0 <1.0
11/16/2016 4.21 <1.0 1.96 <1.0 <1.0
4/5/2017 10.7 <1.0 2.63 <1.0 <1.0
6/29/2017 52.4 4.03 12.4 <1.0 <1.0
9/25/2017 58.1 4.30 31.2 <1.0 2.20
11/9/2017 12.4 <1.0 4.52 <1.0 <1.0
11/16/2017 27.3 1.83 7.63 <1.0 <1.0
12/1/2017 10.6 <1.0 4.13 <1.0 <1.0
12/29/2017 9.53 <1.0 2.82 <1.0 <1.0
1/31/2018 9.19 <1.0 1.96 <1.0 <1.0
MW-6
MW-5
25147073 Tables: Table 6
Page 3 of 5
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Table 6
Detected Constituents in Groundwater
Wheat Ridge Brownfield Remediation
7690 West 38th Avenue
Wheat Ridge, Colorado
Terracon Project Number 25147073
PCE TCE cis-1,2-DCE
trans-1,2-
DCE VC
VOC (8260B) (µg/L)
Sample DateSample ID
3/29/2018
10/10/2018 <1.0 <1.0 <1.0 <1.0 7.43
12/20/2018 <1.0 <1.0 2.44 <1.0 9.61
1/21/2019 <1.0 <1.0 1.56 <1.0 3.56
3/18/2015 11.9 <0.25 1.20 <0.48 <0.45
4/5/2017 1.6 <1.0 <1.0 <1.0 <1.0
11/9/2017 3.05 <1.0 <1.0 <1.0 <1.0
11/16/2017 5.53 <1.0 <1.0 <1.0 <1.0
12/1/2017 3.56 <1.0 <1.0 <1.0 <1.0
12/29/2017 4.05 <1.0 <1.0 <1.0 <1.0
1/31/2018 5.45 <1.0 <1.0 <1.0 <1.0
3/29/2018 5.1 <1.0 <1.0 <1.0 <1.0
1/21/2019 2.89 <1.0 <1.0 <1.0 <1.0
3/18/2015 560 10.3 10.2 <0.48 <0.45
7/31/2015 310 5.6 17.0 <0.48 <0.45
10/28/2015 198 11.4 13.8 <1.0 <1.0
2/10/2016 174 10.5 11.9 <1.0 <1.0
5/17/2016 <1.0 <1.0 <1.0 <1.0 <1.0
8/19/2016 <1.0 <1.0 <1.0 <1.0 <1.0
11/16/2016 130 21.3 31.5 <1.0 <1.0
4/5/2017 92.7 13.5 12.7 <1.0 <1.0
6/29/2017 84.6 5.67 4.89 <1.0 <1.0
9/25/2017 100 10.3 8.72 <1.0 <1.0
3/29/2018 63.2 14.3 11.5 <1.0 <1.0
6/25/2018 54.9 7.64 6.59 <1.0 <1.0
9/24/2018 58.2 5.12 3.91 <1.0 <1.0
12/20/2018 47.9 8.59 8.74 <1.0 <1.0
1/21/2019 50 10.3 9.79 <1.0 <1.0
Monitoring well destroyed
MW-07
MW-8
MW-6R
25147073 Tables: Table 6
Page 4 of 5
2/1/2019
Table 6
Detected Constituents in Groundwater
Wheat Ridge Brownfield Remediation
7690 West 38th Avenue
Wheat Ridge, Colorado
Terracon Project Number 25147073
PCE TCE cis-1,2-DCE
trans-1,2-
DCE VC
VOC (8260B) (µg/L)
Sample DateSample ID
3/18/2015 195 6.6 14.4 <0.48 <0.45
4/5/2017 40.2 <1.0 <1.0 <1.0 <1.0
6/29/2017 167 3.99 1.41 <1.0 <1.0
9/22/2017 51.7 <1.0 <1.0 <1.0 <1.0
3/29/2018 26.5 <1.0 <1.0 <1.0 <1.0
6/25/2018 26.7 <1.0 <1.0 <1.0 <1.0
9/24/2018 59.8 <1.0 <1.0 <1.0 <1.0
12/20/2018 25.7 <1.0 <1.0 <1.0 <1.0
1/21/2019 21.4 <1.0 <1.0 <1.0 <1.0
Temp-1 6/23/2018 7.6 <1.0 <1.0 <1.0 <1.0
Temp-2 6/23/2018 <1.0 <1.0 <1.0 <1.0 <1.0
Temp-3 6/23/2018 3.22 <1.0 <1.0 <1.0 <1.0
17 5 70 140 2
Notes:
1) CDPHE GW Quality Standards – Regulation 41 Table A, Ground Water Organic Chemical Standards (June 30, 2016).
Bold and shaded indicates constituent in exceedance of MCL.
< : Less than analytical method detection limit
J : Result is less than the analytical method reporting limit but greater than
or equal to the analytical method detection limit and the concentration is an approximate value.
DCE = dichloroethene
µg/L : micrograms/liter
PCE = tetrachloroethene
TCE = trichloroethene
VC = vinyl chloride
VOCs : Volatile Organic Compounds
BOS injections occurred in December 2014 and February 2015.
CDPHE Reg. 41 Groundwater
Standard1
MW-9
25147073 Tables: Table 6
Page 5 of 5
2/1/2019
Table 7
RPI Groundwater Analytical Results
Wheat Ridge Brownfield Remediation
7690 West 38th Avenue
Wheat Ridge, Colorado
Terracon Project Number 25147073
Sample ID. No.RDC-1 RDC-1 RDC-2 RDC-3 RDC-3 RDC-4 RDC-4 RDC-5 RDC-7 RDC-16 RDC-17
Date Sampled 12/29/2014 12/29/2014 10/4/2014 10/4/2014 2/20/2015 10/4/2014 10/4/2014 10/4/2014 10/4/2014 10/4/2014 10/4/2014
Sample Depth 9-14' 15-20' 10-20' 15-20' 9-14' 15-20' 15-20' 15-20' 15-20' 9-14'
Units ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L
Propene NE ND (0.5)4.88 (0.5)3.03 (0.5)6.24 (0.5)ND (0.5)ND (0.5)5.96 (0.5)5.17 (0.5)ND (0.5)4.75 (0.5)7.57 (0.5)
2-Methylpropene NE ND (2.0)2.12 (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)2.38 (2.0)ND (2.0)
Vinyl Chloride 2 ND (0.5)ND (0.5)2.86 (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)4.60 (0.5)10.4 (0.5)76.2 (0.5)
1,1-Dichloroethene NE ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
trans-Dicholorethene 140 ND (0.5)ND (0.5)3.43 (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1-Dichloroethane 7 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
cis-Dichloroethene 70 7.00 (0.5)ND (0.5)146 (0.5)7.23 (0.5)21.0 (0.5)0.98 (0.5)ND (0.5)27.3 (0.5)6.57 (0.5)34.8 (0.5)141 (0.5)
Chloroform 3.5 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1,1-Trichloroethane 14,000 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,2-Dichloroethane 5 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
Trichloroethene 5 0.54 (0.5)ND (0.5)7.08 (0.5)1.00 (0.5)34.8 (0.5)0.99 (0.5)ND (0.5)13.2 (0.5)1.20 (0.5)3.42 (0.5)44.9 (0.5)
1,1,2-Trichloroethane 5 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
Tetracholorethene 17 9.54 (0.5)3.22 (0.5)68.0 (0.5)25.7 (0.5)1640 (5)12.0 (0.5)2.79 (0.5)535 (0.5)29.2 (0.5)32.0 (0.5)792 (0.5)
Sample ID. No.RDC-17 RDC-18 RDC-19 RDC-19 RDC-20 RDC-21 RDC-23 RDC-23 RDC-24 RDC-24 RDC-25
Date Sampled 10/4/2014 12/8/2014 10/4/2014 10/4/2014 10/4/2014 10/4/2014 10/4/2014 10/4/2014 10/4/2014 10/4/2014 12/10/2014
Sample Depth 15-20'9-14'15-20'15-20'10-20'9-14'15-20'9-14'20-25'
Units ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L
Propene NE 1.64 (0.5)1.94 (0.5)ND (0.5)1.06 (0.5)3.07 (0.5)1.18 (0.5)ND (0.5)0.95 (0.5)1.41 (0.5)ND (0.5)ND (0.5)
2-Methylpropene NE ND (2.0)ND (0.5)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)
Vinyl Chloride 2 12.1 (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)0.56 (0.5)ND (0.5)ND (0.5)0.81 (0.5)
1,1-Dichloroethene NE ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
trans-Dicholorethene 140 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1-Dichloroethane 7 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
cis-Dichloroethene 70 30.9 (0.5)78.7 (0.5)1.15 (0.5)ND (0.5)2.69 (0.5)0.99 (0.5)8.49 (0.5)1.37 (0.5)4.47 (0.5)0.88 (0.5)9.78 (0.5)
Chloroform 3.5 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1,1-Trichloroethane 14,000 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,2-Dichloroethane 5 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
Trichloroethene 5 4.39 (0.5)26.5 (0.5)ND (0.5)ND (0.5)1.70 (0.5)ND (0.5)2.10 (0.5)ND (0.5)2.25 (0.5)ND (0.5)1.57 (0.5)
1,1,2-Trichloroethane 5 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
Tetracholorethene 17 37.6 (0.5)189 (0.5)4.89 (0.5)3.22 (0.5)164 (0.5)1.50 (0.5)119 (0.5)24.3 (0.5)202 (0.5)10.2 (0.5)16.1 (0.5)
Sample ID. No.RDC-28a RDC-28a RDC-31 RDC-31 RDC-32 RDC-32 RDC-33 RDC-33 RDC-34 RDC-34 RDC-40 RDC-40
Date Sampled 12/15/2014 12/15/2014 12/29/2014 12/29/2014 12/29/2014 12/29/2014 12/29/2014 12/29/2014 12/29/2014 12/29/2014 12/15/2014 12/15/2014
Sample Depth 9-14'15-20'9-14'15-20'9-14'15-20'9-14'15-20'9-14'15-20'9-14'15-20'
Units ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L
Propene NE 3.07 (0.5)4.62 (0.5)ND (0.5)ND (0.5)ND (0.5)2.23 (0.5)ND (0.5)2.88 (0.5)ND (0.5)ND (0.5)3.07 (0.5)4.62 (0.5)
2-Methylpropene NE ND (0.5)ND (0.5)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (0.5)ND (0.5)
Vinyl Chloride 2 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)8.09 (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1-Dichloroethene NE ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
trans-Dicholorethene 140 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)3.86 (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1-Dichloroethane 7 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
cis-Dichloroethene 70 2.04 (0.5)0.55 (0.5)3.51 (0.5)1.60 (0.5)8.53 (0.5)1.12 (0.5)210 (0.5)2.80 (0.5)7.08 (0.5)ND (0.5)2.04 (0.5)0.55 (0.5)
Chloroform 3.5 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1,1-Trichloroethane 14,000 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,2-Dichloroethane 5 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
Trichloroethene 5 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)15.1 (0.5)0.92 (0.5)1.35 (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1,2-Trichloroethane 5 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
Tetracholorethene 17 ND (0.5)ND (0.5)1.61 (0.5)1.07 (0.5)5.78 (0.5)15.7 (0.5)258 (0.5)24.2 (0.5)5.65 (0.5)3.78 (0.5)ND (0.5)ND (0.5)
CDPHE Reg. 41
Groundwater
Standard1
CDPHE Reg. 41
Groundwater
Standard
CDPHE Reg. 41
Groundwater
Standard
N:\Projects\2014\25147073\Working Files\Laboratory-Field Data-Boring Logs\25147073 Tables25147073 Tables 1 of 3
2/1/2019
Table 7
RPI Groundwater Analytical Results
Wheat Ridge Brownfield Remediation
7690 West 38th Avenue
Wheat Ridge, Colorado
Terracon Project Number 25147073
Sample ID. No.MW-1 MW-2 MW-3 MW-4 MW-4 MW-4 MW-4 MW-4 MW-5 MW-5 MW-5
Date Sampled 4/5/2017 4/5/2017 4/5/2017 12/29/2014 2/5/2015 2/10/2015 2/20/2015 4/5/2017 12/30/2014 2/5/2015 2/10/2015
Sample Depth 15-20' 10-20'
Units ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L
Propene NE ND (0.5)ND (0.5)ND (0.5)1.35 (0.5)ND (5)ND (0.5)ND (0.5)ND (0.5)0.99 (0.5)ND (0.5)ND (0.5)
2-Methylpropene NE ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (5)ND (0.5)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)
Vinyl Chloride 2 ND (0.5)ND (0.5)ND (0.5)28.1 (0.5)27.2 (5)ND (0.5)3.76 (0.5)ND (0.5)3.91 (0.5)38.5 (0.5)55.2 (0.5)
1,1-Dichloroethene NE ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
trans-Dicholorethene 140 ND (0.5)ND (0.5)ND (0.5)3.51 (0.5)ND (5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)0.75 (0.5)
1,1-Dichloroethane 7 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
cis-Dichloroethene 70 ND (0.5)4.39 (0.5)ND (0.5)300 (0.5)254 (5)ND (0.5)5.73 (0.5)15.3 (0.5)13.6 (0.5)109 (0.5)116 (0.5)
Chloroform 3.5 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1,1-Trichloroethane 14,000 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,2-Dichloroethane 5 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
Trichloroethene 5 ND (0.5)3.40 (0.5)ND (0.5)31.5 (0.5)42.5 (5)ND (0.5)ND (0.5)11.6 (0.5)2.55 (0.5)19.8 (0.5)16.0 (0.5)
1,1,2-Trichloroethane 5 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
Tetracholorethene 17 3.18 (0.5)64.9 (0.5)2.27 (0.5)1490 (5)1840 (5)ND (0.5)21.3 (0.5)129 (0.5)25.4 (0.5)194 (0.5)153 (0.5)
Lactate (ppm)NE ND (0.2)ND (0.2)ND (0.2)NA NA NA NA ND (0.2)NA NA NA
Acetate (ppm)NE ND (0.2)ND (0.2)ND (0.2)NA NA NA NA ND (0.2)NA NA NA
Formate/Isobutyrate (ppm)NE ND (0.2)ND (0.2)ND (0.2)NA NA NA NA ND (0.2)NA NA NA
Butyrate (ppm)NE ND (0.2)ND (0.2)ND (0.2)NA NA NA NA ND (0.2)NA NA NA
Pyruvate (ppm)NE ND (0.2)ND (0.2)ND (0.2)NA NA NA NA ND (0.2)NA NA NA
Chloride (ppm)NE 83.4 (0.4)92.8 (0.4)76.1 (0.4)NA NA NA NA 76.5 (0.4)NA NA NA
Nitrite (ppm)NE ND (0.2)ND (0.2)ND (0.2)NA NA NA NA ND (0.2)NA NA NA
Succinate (ppm)NE ND (0.2)ND (0.2)ND (0.2)NA NA NA NA ND (0.2)NA NA NA
Nitrate (ppm)NE 0.60 (0.2)3.57 (0.2)0.75 (0.2)NA NA NA NA ND (0.2)NA NA NA
Sulfate (ppm)NE 57.3 (0.2)57.1 (0.2)41.0 (0.2)NA NA NA NA 51.6 (0.2)NA NA NA
Phosphate (ppm)NE ND (0.2)ND (0.2)ND (0.2)NA NA NA NA ND (0.2)NA NA NA
Sulfide (ppm)NE ND (0.2)ND (0.2)ND (0.2)NA NA NA NA ND (0.2)NA NA NA
Methane (ppb)NE ND (20)ND (20)ND (20)NA NA NA NA 41.7 (20)NA NA NA
Ethane (ppb)NE ND (2)ND (2)ND (2)NA NA NA NA 9.12 (2)NA NA NA
Ethylene (ppb)NE ND (2)ND (2)ND (2)NA NA NA NA ND (2)NA NA NA
Propane (ppb)NE ND (2)ND (2)ND (2)NA NA NA NA ND (2)NA NA NA
Propylene (ppb)NE ND (2)ND (2)ND (2)NA NA NA NA ND (2)NA NA NA
Isobutane (ppb)NE ND (2)ND (2)ND (2)NA NA NA NA ND (2)NA NA NA
n-Butane (ppb)NE ND (2)ND (2)ND (2)NA NA NA NA ND (2)NA NA NA
Acetylene (ppb)NE ND (2)ND (2)ND (2)NA NA NA NA ND (2)NA NA NA
t-2-Butene (ppb)NE ND (2)ND (2)ND (2)NA NA NA NA ND (2)NA NA NA
1-Butene (ppb)NE ND (2)ND (2)ND (2)NA NA NA NA ND (2)NA NA NA
Isobutylene (ppb)NE ND (2)ND (2)ND (2)NA NA NA NA ND (2)NA NA NA
cis-2-Butene (ppb)NE ND (2)ND (2)ND (2)NA NA NA NA ND (2)NA NA NA
1,3-Butadiene (ppb)NE ND (2)ND (2)ND (2)NA NA NA NA ND (2)NA NA NA
Methyl Acetylene (ppb)NE ND (2)ND (2)ND (2)NA NA NA NA ND (2)NA NA NA
CDPHE Reg. 41
Groundwater
Standard
N:\Projects\2014\25147073\Working Files\Laboratory-Field Data-Boring Logs\25147073 Tables25147073 Tables 2 of 3
2/1/2019
Table 7
RPI Groundwater Analytical Results
Wheat Ridge Brownfield Remediation
7690 West 38th Avenue
Wheat Ridge, Colorado
Terracon Project Number 25147073
Sample ID. No.MW-5 MW-5 MW-6 MW-6 MW-7 MW-7 MW-8 MW-8 MW-9 MW-9
Date Sampled 2/20/2015 4/5/2017 2/5/2015 4/5/2017 2/5/2015 4/5/2017 2/5/2015 4/5/2017 2/5/2015 4/5/2017
Sample Depth
Units ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L
Propene NE ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
2-Methylpropene NE ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)ND (2.0)
Vinyl Chloride 2 23.9 (0.5)ND (0.5)1.18 (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1-Dichloroethene NE ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
trans-Dicholorethene 140 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1-Dichloroethane 7 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
cis-Dichloroethene 70 83.3 (0.5)48.6 (0.5)4.82 (0.5)2.82 (0.5)ND (0.5)ND (0.5)24.6 (0.5)15.4 (0.5)5.32 (0.5)ND (0.5)
Chloroform 3.5 ND (0.5)ND (0.5)ND (0.5)ND (0.5)0.52 (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,1,1-Trichloroethane 14,000 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
1,2-Dichloroethane 5 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
Trichloroethene 5 16.7 (0.5)2.98 (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)42.5 (0.5)14.7 (0.5)4.51 (0.5)ND (0.5)
1,1,2-Trichloroethane 5 ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)ND (0.5)
Tetracholorethene 17 169 (0.5)28.1 (0.5)6.07 (0.5)12.9 (0.5)ND (0.5)1.75 (0.5)1390 (5)98.8 (0.5)123 (0.5)36.9 (0.5)
Lactate (ppm)NE NA ND (0.2)NA ND (0.2)NA ND (0.2)NA ND (0.2)NA ND (0.2)
Acetate (ppm)NE NA ND (0.2)NA ND (0.2)NA ND (0.2)NA ND (0.2)NA ND (0.2)
Formate/Isobutyrate (ppm)NE NA ND (0.2)NA ND (0.2)NA ND (0.2)NA ND (0.2)NA ND (0.2)
Butyrate (ppm)NE NA ND (0.2)NA ND (0.2)NA ND (0.2)NA ND (0.2)NA ND (0.2)
Pyruvate (ppm)NE NA ND (0.2)NA ND (0.2)NA ND (0.2)NA ND (0.2)NA ND (0.2)
Chloride (ppm)NE NA 83.7 (0.4)NA 89.8 (0.4)NA 65.6 (0.4)NA 72.9 (0.4)NA 73.1 (0.4)
Nitrite (ppm)NE NA ND (0.2)NA ND (0.2)NA ND (0.2)NA ND (0.2)NA ND (0.2)
Succinate (ppm)NE NA ND (0.2)NA ND (0.2)NA ND (0.2)NA ND (0.2)NA ND (0.2)
Nitrate (ppm)NE NA 0.61 (0.2)NA 0.66 (0.2)NA 0.68 (0.2)NA ND (0.2)NA ND (0.2)
Sulfate (ppm)NE NA 51.9 (0.2)NA 56.5 (0.2)NA 57.8 (0.2)NA 49.5 (0.2)NA 57.1 (0.2)
Phosphate (ppm)NE NA ND (0.2)NA ND (0.2)NA ND (0.2)NA ND (0.2)NA ND (0.2)
Sulfide (ppm)NE NA ND (0.2)NA ND (0.2)NA ND (0.2)NA ND (0.2)NA ND (0.2)
Methane (ppb)NE NA ND (20)NA ND (20)NA ND (20)NA 234 (20)NA ND (20)
Ethane (ppb)NE NA ND (2)NA ND (2)NA ND (2)NA 62.0 (2)NA ND (2)
Ethylene (ppb)NE NA ND (2)NA ND (2)NA ND (2)NA ND (2)NA ND (2)
Propane (ppb)NE NA ND (2)NA ND (2)NA ND (2)NA ND (2)NA ND (2)
Propylene (ppb)NE NA ND (2)NA ND (2)NA ND (2)NA ND (2)NA ND (2)
Isobutane (ppb)NE NA ND (2)NA ND (2)NA ND (2)NA ND (2)NA ND (2)
n-Butane (ppb)NE NA ND (2)NA ND (2)NA ND (2)NA ND (2)NA ND (2)
Acetylene (ppb)NE NA ND (2)NA ND (2)NA ND (2)NA ND (2)NA ND (2)
t-2-Butene (ppb)NE NA ND (2)NA ND (2)NA ND (2)NA ND (2)NA ND (2)
1-Butene (ppb)NE NA ND (2)NA ND (2)NA ND (2)NA ND (2)NA ND (2)
Isobutylene (ppb)NE NA ND (2)NA ND (2)NA ND (2)NA ND (2)NA ND (2)
cis-2-Butene (ppb)NE NA ND (2)NA ND (2)NA ND (2)NA ND (2)NA ND (2)
1,3-Butadiene (ppb)NE NA ND (2)NA ND (2)NA ND (2)NA ND (2)NA ND (2)
Methyl Acetylene (ppb)NE NA ND (2)NA ND (2)NA ND (2)NA ND (2)NA ND (2)
Notes:
1 CDPHE GW Quality Standards – Regulation 41 Table A, Ground Water Organic Chemical Standards (June 30, 2016).
Bold = Analyte detected above the laboratory reporting limit.
Shaded = Analyte detected above the CGWQS.
ug/L = micrograms per Liter
NA = Not applicable
ND = Not detected
ppb = parts per billion
ppm = parts per million
NE = Not Established
CDPHE Reg. 41
Groundwater
Standard
N:\Projects\2014\25147073\Working Files\Laboratory-Field Data-Boring Logs\25147073 Tables25147073 Tables 3 of 3
2/1/2019
Table 8
Slug Test Results
Wheat Ridge Brownfield Remediation
7690 West 38th Avenue
Wheat Ridge, Colorado
Terracon Project Number 25147073
Test ID
MW-04 Slug In 11
MW-04 Slug Out 11
MW-04 Slug In 21
MW-04 Slug Out 21
MW-06 Slug In 1
MW-06 Slug Out 1
MW-06 Slug In 32
MW-06 Slug Out 3
MW-08 Slug In 1
MW-08 Slug Out 1
MW-08 Slug In 2
MW-08 Slug Out 2
Geometric Mean K
(feet per sec):2.53E-05 Geometric Mean K
(cm/sec):7.71E-04
1 The slug test results for this monitoring well were inconsistent compared to the tests for the other wells.
During review, it was determined that the inconsistently was likely related to the well installation method.
Direct push methods were used whereas the other wells were installed via hollow stem auger methods.
The data for this well were not used to calculate the hydraulic conductivity for this site.
2 A third slug test for monitoring well MW-6 was required due to the wind blowing a foreign object in the
twine holding the transducer in the monitoring well. This shifted the transducer approximately half way
through the test.
cm/sec = centimeters per second
See supporting documentation and calcuations in Appendix H.
Hydraulic Conductivity - K
(feet per sec)
Hydraulic Conductivity - K
(cm/sec)
7.766E-06
1.92E-04
7.14E-05
2.37E-04
6.46E-06
1.40E-04
2.118E-07
4.605E-06
6.314E-06
2.341E-06
1.009E-05 3.08E-04
7.268E-05 2.22E-03
7.046E-06
1.009E-05
2.15E-04
3.08E-04
7.134E-05 2.17E-03
7.356E-05
7.856E-05
2.24E-03
2.39E-03
25147073 TablesTable 8
Page 1 of 1
2/1/2019
Site-specific VISL Results 1
Commercial Equation Inputs
* Inputted values different from Commercial defaults are highlighted.
Output generated 01FEB2019:00:04:56
Variable
Commercial
Air
Default
Value Value
AFgw (Attenuation Factor Groundwater) unitless 0.001 0.001
AFss (Attenuation Factor Sub-Slab) unitless 0.03 0.03
ATw (averaging time - composite worker)365 365
EDw (exposure duration - composite worker) yr 25 25
EFw (exposure frequency - composite worker) day/yr 250 250
ETw (exposure time - composite worker) hr 8 8
THQ (target hazard quotient) unitless 0.1 1
LT (lifetime) yr 70 70
TR (target risk) unitless 1.0E-06 1.0E-06
Commercial Vapor Intrusion Screening Levels (VISL)2
Key: I = IRIS; P = PPRTV; O = OPP; A = ATSDR; C = Cal EPA; X = APPENDIX PPRTV SCREEN;
H = HEAST; W = see RSL user guide Section 2.3.5; E = see RSL user guide Section 2.3.6; S = see RSL
user's guide Section 5.
Chemical
CAS
Number
Does the
chemical
meet
the
definition
for
volatility?
(HLC>1E-5
or VP>1)
Does the
chemical
have
inhalation
toxicity
data?
(IUR
and/or
RfC)
Is Chemical
Sufficiently
Volatile and Toxic
to
Pose Inhalation
Risk
Via Vapor
Intrusion
from Soil Source?
(Cvp > Ci,a,Target?)
Is Chemical
Sufficiently
Volatile and Toxic
to
Pose Inhalation
Risk
Via Vapor
Intrusion from
Groundwater
Source?
(Chc > Ci,a,Target?)
Target
Indoor Air
Concentration
(TCR=1E-06
or THQ=1)
MIN(Cia,c,Cia,nc)
(µg/m3)
Toxicity
Basis
Dichloroethylene, 1,2-cis-156-59-2 Yes No No Inhal. Tox. Info No Inhal. Tox. Info
Tetrachloroethylene 127-18-4 Yes Yes Yes Yes 4.72E+01 CA
Trichloroethylene 79-01-6 Yes Yes Yes Yes 2.99E+00 CA
Chemical
Target
Sub-Slab and
Near-source
Soil Gas
Concentration
(TCR=1E-06
or THQ=1)
Csg,Target
(µg/m3)
Target
Groundwater
Concentration
(TCR=1E-06
or THQ=1)
Cgw,Target
(µg/L)
Is Target
Groundwater
Concentration
< MCL?
(Cgw < MCL?)
Pure Phase
Vapor
Concentration
Cvp\
(19 ℃)\
(µg/m3)
Maximum
Groundwater
Vapor
Concentration
Chc\
(µg/m3)
Temperature
for Maximum
Groundwater
Vapor
Concentration
(℃)
Lower
Explosive
Limit
LEL
(%
by
volume)
Dichloroethylene, 1,2-cis-1.04E+09 8.36E+08 19 3.00
Tetrachloroethylene 1.57E+03 8.87E+01 No (5)1.65E+08 1.10E+08 19
Trichloroethylene 9.97E+01 9.70E+00 No (5)4.88E+08 3.95E+08 19 8.00
Chemical
LEL
Ref
IUR
(ug/m3)-1
IUR
Ref
RfC
(mg/m3)
RfC
Ref
Mutagenic
Indicator
Carcinogenic
VISL
TCR=1E-06
Cia,c(µg/m3)
Noncarcinogenic
VISL
THQ=1
Cia,nc(µg/m3)
Dichloroethylene, 1,2-cis-U No
Tetrachloroethylene 2.60E-07 U 4.00E-02 U No 4.72E+01 1.75E+02
Trichloroethylene U 4.10E-06 U 2.00E-03 U Mut 2.99E+00 8.76E+00
Commercial Vapor Intrusion Risk 3
Output generated 01FEB2019:00:04:56
Chemical
CAS
Number
Site
Groundwater
Concentration
Cgw\
(µg/L)
Site
Indoor Air
Concentration
Ci,a\
(µg/m3)
VI
Carcinogenic
Risk
CR
VI
Hazard
HQ
IUR
(ug/m3)-1
IUR
Ref
Chronic
RfC
(mg/m3)
Dichloroethylene, 1,2-cis-156-59-2 10.9
Tetrachloroethylene 127-18-4 50 2.66E+01 5.64E-07 1.52E-01 2.60E-07 U 4.00E-02
Trichloroethylene 79-01-6 10.3 3.18E+00 1.06E-06 3.63E-01 4.10E-06 U 2.00E-03
*Sum 1.63E-06 5.14E-01
Chemical
RfC
Ref
Temperature
(℃)\
for
Groundwater
Vapor
Concentration Mutagen?
Dichloroethylene, 1,2-cis-19 No
Tetrachloroethylene U 19 No
Trichloroethylene U 19 Mut
*Sum
Chemical Properties 4
Output generated 01FEB2019:00:04:56
Chemical
CAS
Number
Does the
chemical
meet
the
definition
for
volatility?
(HLC>1E-5
or VP>1)
Does the
chemical
have
inhalation
toxicity
data?
(IUR
and/or
RfC)MW
MW
Ref
Vapor
Pressure
VP
(mm Hg)
VP
Ref
S
(mg/L)
S
Ref
MCL
(ug/L)
HLC
(atm-m3/mole)
Henry's
Law
Constant
(unitless)
Dichloroethylene, 1,2-cis-156-59-2 Yes No 96.94 U 2.00E+02 U 6.41E+03 U 70 4.08E-03 1.67E-01
Tetrachloroethylene 127-18-4 Yes Yes 165.83 U 1.85E+01 U 2.06E+02 U 5 1.77E-02 7.24E-01
Trichloroethylene 79-01-6 Yes Yes 131.39 U 6.90E+01 U 1.28E+03 U 5 9.85E-03 4.03E-01
Chemical
Henry's
Law
Constant
(19 ℃)
Henry's
Law
Constant
Used in
Calcs
(unitless)
H`
and
HLC
Ref
Enthalpy of
vaporization
@
groundwater
temperature
ΔHv,gw\
(cal/mol)
Exponent
for
ΔHv,gw
Vapor
Pressure
VP
(19 ℃)\
(mm Hg)
Dia\
(cm2/s)
Dia\
(19 ℃)\
(cm2/s)
Dia\
Used in
Calcs
(cm2/s)
Dia\
Ref
Diw\
(cm2/s)
Dichloroethylene, 1,2-cis-1.30E-01 1.30E-01 U 7693.42 0.34 8.14E+08 8.56E-02 0.0856418 0.0856418 U 1.11E-05
Tetrachloroethylene 5.32E-01 5.32E-01 U 9460.67 0.35 1.21E+08 4.89E-02 0.0489086 0.0489086 U 9.25E-06
Trichloroethylene 3.08E-01 3.08E-01 U 8275.93 0.35 3.73E+08 6.65E-02 0.0665139 0.0665139 U 1.00E-05
Chemical
Diw\
(19 ℃)\
(cm2/s)
Diw\
Used in
Calcs
(cm2/s)
Diw\
Ref
Normal
Boiling
Point
BP
(K)
BP
Ref
Critical
Temperature
TC
(K)
TC
Ref
Enthalpy of
vaporization
at
the normal
boiling point
ΔHv,b\
(cal/mol)
ΔHv,b\
Ref
Koc\
(cm3/g)
Koc\
Ref
Lower
Explosive
Limit
LEL
(%
by
volume)
LEL
Ref
Dichloroethylene, 1,2-cis-0.0000111 0.0000111 U 333.25 U 5.36E+02 U 7220.00 U 39.6 U 3.00 U
Tetrachloroethylene 9.2542E-6 9.2542E-6 U 394.15 U 6.20E+02 U 8290.00 U 94.9 U
Trichloroethylene 9.9978E-6 9.9978E-6 U 360.35 U 5.71E+02 U 7500.00 U 60.7 U 8.00 U
Table 10
List of Regional Groundwater Wells
Wheat Ridge Brownfield Remedation
7690 West 38th Avenue
Wheat Ridge, Colorado
Terracon Project Number 25147073
RECEIPT PERMIT WELL NAME WELL TYPE OWNER MAILING ADDRESS CITY STATE ZIPCODE
9025305 4165-DOMESTIC WILMORE W M 7790 W 41ST AV WHEATRIDGE CO 80033
9026901 15468-DOMESTIC GLASSMANN C R 3265 BALSOM WHEATRIDGE CO 80033
9025206 3681-F INDUSTRIAL JOHNSON L L 7800 W 38TH AVE WHEATRIDGE CO 80033
3621749 275737-DOMESTIC LEVY LLOYD & PATRICIA BARRY 3275 UPHAM ST WHEAT RIDGE CO 80033-
0430970 211071-DOMESTIC SCHREIBMAN WALTER 7455 W 35TH AVE WHEAT RIDGE CO 80033
9028506 30953-DOMESTIC CLARK RALPH 7500 W 33RD AVE WHEATRIDGE CO 80033
9024858 2086-DOMESTIC BROOKS PAUL 3863 ALLISON CIR WHEATRIDGE CO 80033
9029445 41554-DOMESTIC YELVERTON GEORGE 3925 AMMONS WHEATRIDGE CO 80033
9024593 516-RN WELL #1-RN516 DOMESTIC ECKHARDT ROBERT P 7400 W 34TH AV WHEATRIDGE CO 80033
9033198 90287-DOMESTIC BURT WILFORD W 4150 BALSAM ST WHEATRIDGE CO 80033
9026494 12606-DOMESTIC ASNICON CHARLES 7765 3 ACRES LA WHEATRIDGE CO 80033
3650133 285850-IRRIGATION BEALS RONNIE V & PATRICIA A 7337 W 35TH AVENUE WHEAT RIDGE CO 80033-
9026313 11228-DOMESTIC LEWARK NORMAN 4100 BALSAM WHEATRIDGE CO 80033
9024675 848-DOMESTIC GIRTIN BILL 4040 YARROW WHEATRIDGE CO 80033
9030051 48426-DOMESTIC NAGATA ERNEST & MINA E 7003 W 35TH AVE WHEATRIDGE CO 80033
9031144 64443-DOMESTIC JOHNSON ALBERT P 3910 REED ST WHEATRIDGE CO 80033
9033400 92440-DOMESTIC DEPINTO RICHARD J 4220 UPHAM ST WHEATRIDGE CO 80033
9034656 107769-DOMESTIC CURRIER RANDOLPH G 7505 W YALE AVE DENVER CO 80227
9027047 16712-DOMESTIC FORSBERG WARREN 4236 AMMONS ST WHEAT RIDGE CO 80033
0483199 237415-DOMESTIC BRINKMAN ANNE B & EGGELTON RYAN Y 7420 WEST 34TH AVE WHEATRIDGE CO 80033-
0494485 245386-IRRIGATION FULLER ESTEL H & SHERRY L 7325 W 34TH AVE WHEAT RIDGE CO 80033-
C301851 1851-WCB DOMESTIC BIBBER OTTO 8101 W 32ND AVE LAKEWOOD CO
9024695 897-DOMESTIC CAPRON U H 3875 ALLISON CIR WHEATRIDGE CO 80033
9025325 4271-DOMESTIC SPIER NORMAN 4045 YARROW WHEATRIDGE CO 80033
9029205 38593-DOMESTIC GRAUE BYRON 3834 REED ST WHEATRIDGE CO 80033
9029440 41507-DOMESTIC TOWNSEND WARREN W 3950 AMMONS WHEATRIDGE CO 80033
9028283 29028-DOMESTIC MURPHY ROBERT J & MINNIE A 2915 PIERCE ST WHEATRIDGE CO 80033
9028070 27395-DOMESTIC WILLIS JACK 7890 W 38TH AVE WHEATRIDGE CO 80033
9027293 19526-DOMESTIC BERUNO PETER 7250 W 35TH PL WHEATRIDGE CO 80033
9027484 21393-DOMESTIC WICK STEVEN & JAMES & DORIS 1911 S XENIA ST DENVER CO 80231-
3635621 279547-IRRIGATION ARENDT GLEN & TAMARA 7455 W 35TH AVENUE WHEAT RIDGE CO 80033-
0072381 85383-DOMESTIC LACOSTE HARRY 7006 W 36TH AVE WHEATRIDGE CO 80033-
3639741 280846-DOMESTIC STORM TREVOR R & IRINA P 7380 29TH AVENUE WHEAT RIDGE CO 80033-
0463843 228843-DOMESTIC HAVEY ADRIENNE A & JOSHUA M 7447 W 35TH AVE WHEAT RIDGE CO 80033-
3668294 297005-DOMESTIC ROBB KELSEY 7345 W 34TH AVENUE WHEATRIDGE CO 80033-
3648237 284758-IRRIGATION AYLER CRAIG & BECKY ZACKMEIER 4200 UPHAM STREET WHEAT RIDGE CO 80033-
9030332 51737-DOMESTIC VAN GORDEN HAROLD W.4195 TELLER ST.WHT RDGE CO
9025717 6676-DOMESTIC BUECHER WALTER H 7480 W 34TH WHEATRIDGE CO 80033
9024466 112-DOMESTIC ARKO 3880 BALSAM WHEATRIDGE CO
9025240 3863-DOMESTIC HESTER P E 4095 YARROW WHEATRIDGE CO 80033
9025284 4087-DOMESTIC ROSE G H 3333 WADSWORTH WHEATRIDGE CO 80033
9032359 82018-DOMESTIC NIXON MYRON E & JESSIE I 4115 UPHAM ST WHEAT RIDGE CO 80033
9027003 16344-DOMESTIC NIKKEL PAUL 4175 UPHAM WHEATRIDGE CO 80033
0342659B 166181--A IRRIGATION SKAFF JIMEL 4015 AMMONS ST WHEAT RIDGE CO 80033
9024814 1796-DOMESTIC GARIN JOHN T 3845 ALLISON CIR WHEATRIDGE CO 80033
9025071 3203-DOMESTIC WILSON W W 3870 BALSAM WHEATRIDGE CO 80033
9026971 15942-R IRRIGATION RICHARDSON DANIEL W & RUTH S BX 145 WHEATRIDGE CO 80033
9027008 16349-DOMESTIC WOOD JAMES C 4039 UPHAM WHEATRIDGE CO 80033
9027348 19936-DOMESTIC SCHARTZ RUSSELL 4040 QUAY ST WHEATRIDGE CO 80033
9027793 24506-DOMESTIC KIMBALL RALPH 4101 REED ST WHEATRIDGE CO 80033
9029444 41553-DOMESTIC DIGIACOMA CARL 8125 W 39TH AVE WHEATRIDGE CO 80033
0501541 246791-DOMESTIC OLOFSON LOUIS 7520 W 35TH AVE WHEAT RIDGE CO 80033-
9035155 142780-OTHER WALZ HANS A. & IONA M.3990 AMMONS ST.WHEATRIDGE CO 80033
0543695C 266474-MW-02 DOMESTIC SAFEWAY INC C/O ENVIRO RESOURCES MGMT 5950 S WILLOW DRIVE SUITE 200 GREENEOOD VILLAGE CO 80111-
0098906 102810-DOMESTIC CARLYLE HENRY J 7035 W 39TH AVE WHEATRIDGE CO 80033
9026839 15056-LACEY G F 7300 W 33RD AVE WHEATRIDGE CO 80033
9033916 96981-DOMESTIC ARCHER MAURICE 3915 BRENTWOOD WHEATRIDGE CO 80033
N:\Projects\2014\25147073\Working Files\Laboratory-Field Data-Boring Logs\25147073 TablesTable 10 Page 1 of 2
2/1/2019
Table 10
List of Regional Groundwater Wells
Wheat Ridge Brownfield Remedation
7690 West 38th Avenue
Wheat Ridge, Colorado
Terracon Project Number 25147073
9033353 91780-DOMESTIC WINEBERG MARLIN H 7500 WEST 35TH AVE WHEATRIDGE CO 80033
0420580 206180-IRRIGATION RUTHERFORD JAMES W & DIANE S 7507 W 35TH AVE WHEATRIDGE CO 80033
9026491 12588-DOMESTIC BRISNEHAN R B 3591 ALLISON WHEATRIDGE CO 80033
9026516 12729-DOMESTIC KATZENBERGER CARL F 3560 ALLISON ST WHEATRIDGE CO 80033
9026524 12771-DOMESTIC LACEY HAROLD 3652 ALLISON ST WHEATRIDGE CO 80033
9026621 13443-DOMESTIC LAHEY THOMAS C 3711 ALLISON ST LAKEWOOD CO 80215
9027351 19949-DOMESTIC KAHRE ALEX H 3682 ALLISON ST WHEATRIDGE CO 80033
9029334 40147-DOMESTIC CASTELLANI PIETRO 7270 W 35TH PL WHEATRIDGE CO 80033
9032690 85383--A DOMESTIC LACOSTE HARRY 7006 W 36TH AVE WHEAT RIDGE CO 80033
9033969 97451-DOMESTIC DICKMAN DENNIS R 7070 W 36TH AVE WHEAT RIDGE CO 80033
9024429 22-F IRRIGATION REID LESTER J 7460 W 35TH AVE WHEATRIDGE CO 80033
9025853 7617-F IRRIGATION GREENWOLD MERTON E 6709 W 33RD AV WHEATRIDGE CO 80033
9026953 15783-DOMESTIC FRAZIER CHARLES S 7425 W 34TH AVE DENVER CO 80202
9027710 23739-DOMESTIC BOWMAN C W 4574 OSCEOLA DENVER CO 80202
9032738 85957-DOMESTIC SCHIMMING RICHARD 8200 W 40TH AVE WHEATRIDGE CO 80033
9025419 4821-DOMESTIC 4402730O F 4275 UPHAM ST WHEATRIDGE CO 80033
3647003 284034-DAVIS WELL #1 DOMESTIC DAVIS KENT O 8080 MELROSE DRIVE WHEAT RIDGE CO 80033-
9025283 4072-DOMESTIC DORCHAK L J 3855 ALLISON CR WHEATRIDGE CO 80033
9026113 9408-DOMESTIC GREEN CLARENCE 4130 YARROW WHEATRIDGE CO 80033
0442906 216629-DOMESTIC TALLENT DEANNE/PETER & LINDA GROTH 7485 W 34TH AVE WHEATRIDGE CO 80033
N:\Projects\2014\25147073\Working Files\Laboratory-Field Data-Boring Logs\25147073 TablesTable 10 Page 2 of 2
2/1/2019
APPENDIX A
(On CD)
HISTORICAL PHASE I ESAs
APPENDIX B
(On CD)
HISTORICAL PHASE II ESAs
APPENDIX C
(On CD)
ORIGINAL VCP APPLICATION AND APPROVAL
APPENDIX D
(On CD)
ACM REPORTS
APPENDIX E
SOIL EXCAVATION SUMMARY LETTER REPORT
(On CD)
APPENDIX F
(On CD)
BOS 100® INJECTION EVENT REPORT
REMEDIATION INJECTION RULE AUTHORIZATION
APPLICATION
APPENDIX G
(On CD)
SOIL BORING LOGS
APPENDIX H
GROUNDWATER ANALYTICAL LABORATORY REPORTS
(On CD)
APPENDIX I
SLUG TEST RESULTS
0.400.800.1.2E+3 1.6E+3 2.0E+3
1.0E-4
0.001
0.01
0.1
1.
Time (min)
N o r m a l i z e d
H e a d
(f t /f t )
WELL TEST ANALYSIS
Data Set:N:\...\MW-4 Slug in T1.aqt
Date:06/12/17 Time:11:52:14
PROJECT INFORMATION
Company:Terracon
Client:Wheat Ridge Brown Fields
Project:25147073
Test Well:MW-5
Test Date:1/9/15
AQUIFER DATA
Saturated Thickness:9.588 ft Anisotropy Ratio (Kz/Kr):1.
WELL DATA (MW-4)
Initial Displacement:2.442 ft Static Water Column Height:9.588 ft
Total Well Penetration Depth:9.588 ft Screen Length:9.588 ft
Casing Radius:0.0834 ft Well Radius:0.0834 ft
Gravel Pack Porosity:0.
SOLUTION
Aquifer Model:Unconfined Solution Method:Bouwer-Rice
K =2.118E-7 ft/sec y0 =1.669 ft
0.400.800.1.2E+3 1.6E+3 2.0E+3
0.001
0.01
0.1
1.
Time (sec)
N o r m a l i z e d
H e a d
(f t /f t )
WELL TEST ANALYSIS
Data Set:N:\...\MW-4 Slug in T2.aqt
Date:06/12/17 Time:11:48:40
PROJECT INFORMATION
Company:Terracon
Client:Wheat Ridge Brown Fields
Project:25147073
Test Well:MW-4
Test Date:4/26/17
AQUIFER DATA
Saturated Thickness:9.055 ft Anisotropy Ratio (Kz/Kr):1.
WELL DATA (MW-4)
Initial Displacement:2.634 ft Static Water Column Height:9.055 ft
Total Well Penetration Depth:9.055 ft Screen Length:9.055 ft
Casing Radius:0.08333 ft Well Radius:0.08333 ft
Gravel Pack Porosity:0.
SOLUTION
Aquifer Model:Unconfined Solution Method:Bouwer-Rice
K =6.314E-6 ft/sec y0 =1.546 ft
0.600.1.2E+3 1.8E+3 2.4E+3 3.0E+3
1.0E-4
0.001
0.01
0.1
1.
Time (sec)
N o r m a l i z e d
H e a d
(f t /f t )
WELL TEST ANALYSIS
Data Set:N:\...\MW-4 Slug out T1.aqt
Date:06/12/17 Time:11:55:50
PROJECT INFORMATION
Company:Terracon
Client:Wheat Ridge Brown Fields
Project:25147073
Test Well:MW-4
Test Date:4/26/17
AQUIFER DATA
Saturated Thickness:9.032 ft Anisotropy Ratio (Kz/Kr):1.
WELL DATA (MW-4)
Initial Displacement:1.969 ft Static Water Column Height:9.032 ft
Total Well Penetration Depth:9.032 ft Screen Length:9.032 ft
Casing Radius:0.0834 ft Well Radius:0.0834 ft
Gravel Pack Porosity:0.
SOLUTION
Aquifer Model:Unconfined Solution Method:Bouwer-Rice
K =4.605E-6 ft/sec y0 =1.923 ft
0.600.1.2E+3 1.8E+3 2.4E+3 3.0E+3
1.0E-5
1.0E-4
0.001
0.01
0.1
1.
Time (sec)
N o r m a l i z e d
H e a d
(f t /f t )
WELL TEST ANALYSIS
Data Set:N:\...\MW-4 Slug out T2.aqt
Date:06/12/17 Time:11:55:07
PROJECT INFORMATION
Company:Terracon
Client:Wheat Ridge Brown Fields
Project:25147073
Test Well:MW-4
Test Date:4/26/17
AQUIFER DATA
Saturated Thickness:9.063 ft Anisotropy Ratio (Kz/Kr):1.
WELL DATA (MW-4)
Initial Displacement:1.882 ft Static Water Column Height:9.063 ft
Total Well Penetration Depth:9.063 ft Screen Length:9.063 ft
Casing Radius:0.08333 ft Well Radius:0.08333 ft
Gravel Pack Porosity:0.
SOLUTION
Aquifer Model:Unconfined Solution Method:Bouwer-Rice
K =2.341E-6 ft/sec y0 =2.065 ft
0.400.800.1.2E+3 1.6E+3 2.0E+3
0.001
0.01
0.1
1.
Time (sec)
N o r m a l i z e d
H e a d
(f t /f t )
WELL TEST ANALYSIS
Data Set:N:\...\MW-6 Slug in T1.aqt
Date:06/12/17 Time:11:37:13
PROJECT INFORMATION
Company:Terracon
Client:Wheat Ridge Brown Fields
Project:25147073
Test Well:MW-6
Test Date:4/26/17
AQUIFER DATA
Saturated Thickness:9.504 ft Anisotropy Ratio (Kz/Kr):1.
WELL DATA (MW-6)
Initial Displacement:0.775 ft Static Water Column Height:9.504 ft
Total Well Penetration Depth:9.504 ft Screen Length:9.504 ft
Casing Radius:0.08333 ft Well Radius:0.08333 ft
Gravel Pack Porosity:0.
SOLUTION
Aquifer Model:Unconfined Solution Method:Bouwer-Rice
K =7.766E-6 ft/sec y0 =0.24 ft
0.400.800.1.2E+3 1.6E+3 2.0E+3
0.001
0.01
0.1
1.
Time (sec)
N o r m a l i z e d
H e a d
(f t /f t )
WELL TEST ANALYSIS
Data Set:N:\...\MW-6 Slug in T2.aqt
Date:06/12/17 Time:11:41:00
PROJECT INFORMATION
Company:Terracon
Client:Wheat Ridge Brown Fields
Project:25147073
Test Well:MW-6
Test Date:4/26/17
AQUIFER DATA
Saturated Thickness:9.525 ft Anisotropy Ratio (Kz/Kr):1.
WELL DATA (MW-6)
Initial Displacement:1.505 ft Static Water Column Height:9.525 ft
Total Well Penetration Depth:9.525 ft Screen Length:9.525 ft
Casing Radius:0.08333 ft Well Radius:0.08333 ft
Gravel Pack Porosity:0.
SOLUTION
Aquifer Model:Unconfined Solution Method:Bouwer-Rice
K =7.826E-6 ft/sec y0 =0.2065 ft
0.400.800.1.2E+3 1.6E+3 2.0E+3
0.001
0.01
0.1
1.
Time (sec)
N o r m a l i z e d
H e a d
(f t /f t )
WELL TEST ANALYSIS
Data Set:N:\...\MW-6 Slug in T3.aqt
Date:06/12/17 Time:11:38:11
PROJECT INFORMATION
Company:Terracon
Client:Wheat Ridge Brown Fields
Project:25147073
Test Well:MW-6
Test Date:4/26/17
AQUIFER DATA
Saturated Thickness:9.481 ft Anisotropy Ratio (Kz/Kr):1.
WELL DATA (MW-6)
Initial Displacement:1.368 ft Static Water Column Height:9.481 ft
Total Well Penetration Depth:9.481 ft Screen Length:9.481 ft
Casing Radius:0.08333 ft Well Radius:0.08333 ft
Gravel Pack Porosity:0.
SOLUTION
Aquifer Model:Unconfined Solution Method:Bouwer-Rice
K =7.046E-6 ft/sec y0 =0.2145 ft
0.800.1.6E+3 2.4E+3 3.2E+3 4.0E+3
0.001
0.01
0.1
1.
Time (sec)
N o r m a l i z e d
H e a d
(f t /f t )
WELL TEST ANALYSIS
Data Set:N:\...\MW-6 Slug out T1.aqt
Date:06/12/17 Time:11:29:49
PROJECT INFORMATION
Company:Terracon
Client:Wheat Ridge Brown Fields
Project:25147073
Test Well:MW-6
Test Date:4/26/17
AQUIFER DATA
Saturated Thickness:9.504 ft Anisotropy Ratio (Kz/Kr):1.
WELL DATA (MW-6)
Initial Displacement:1.729 ft Static Water Column Height:9.504 ft
Total Well Penetration Depth:9.504 ft Screen Length:9.504 ft
Casing Radius:0.0833 ft Well Radius:0.08333 ft
Gravel Pack Porosity:0.
SOLUTION
Aquifer Model:Unconfined Solution Method:Bouwer-Rice
K =1.009E-5 ft/sec y0 =0.2064 ft
0.400.800.1.2E+3 1.6E+3 2.0E+3
0.001
0.01
0.1
1.
Time (sec)
N o r m a l i z e d
H e a d
(f t /f t )
WELL TEST ANALYSIS
Data Set:N:\...\MW-6 Slug out T2.aqt
Date:06/12/17 Time:11:20:51
PROJECT INFORMATION
Company:Terracon
Client:Wheat Ridge Brown Fields
Project:25147073
Test Well:MW-6
Test Date:4/26/17
AQUIFER DATA
Saturated Thickness:9.541 ft Anisotropy Ratio (Kz/Kr):1.
WELL DATA (MW-6)
Initial Displacement:1.724 ft Static Water Column Height:9.541 ft
Total Well Penetration Depth:9.541 ft Screen Length:9.541 ft
Casing Radius:0.08333 ft Well Radius:0.08333 ft
Gravel Pack Porosity:0.
SOLUTION
Aquifer Model:Unconfined Solution Method:Bouwer-Rice
K =9.585E-6 ft/sec y0 =0.2318 ft
0.400.800.1.2E+3 1.6E+3 2.0E+3
0.001
0.01
0.1
1.
Time (sec)
N o r m a l i z e d
H e a d
(f t /f t )
WELL TEST ANALYSIS
Data Set:N:\...\MW-6 Slug out T3.aqt
Date:06/12/17 Time:11:34:07
PROJECT INFORMATION
Company:Terracon
Client:Wheat Ridge Brown Fields
Project:25147073
Test Well:MW-6
Test Date:4/26/17
AQUIFER DATA
Saturated Thickness:9.481 ft Anisotropy Ratio (Kz/Kr):1.
WELL DATA (MW-6)
Initial Displacement:1.649 ft Static Water Column Height:9.481 ft
Total Well Penetration Depth:9.481 ft Screen Length:9.481 ft
Casing Radius:0.08333 ft Well Radius:0.08333 ft
Gravel Pack Porosity:0.
SOLUTION
Aquifer Model:Unconfined Solution Method:Bouwer-Rice
K =1.009E-5 ft/sec y0 =0.2407 ft
0.200.400.600.800.1000.
1.0E-4
0.001
0.01
0.1
1.
Time (sec)
N o r m a l i z e d
H e a d
(f t /f t )
WELL TEST ANALYSIS
Data Set:N:\...\MW-8 Slug in T1.aqt
Date:06/12/17 Time:12:01:19
PROJECT INFORMATION
Company:Terracon
Client:Wheat Ridge Brown Fields
Project:25147073
Test Well:MW-8
Test Date:4/26/17
AQUIFER DATA
Saturated Thickness:9.547 ft Anisotropy Ratio (Kz/Kr):1.
WELL DATA (MW-8)
Initial Displacement:2.307 ft Static Water Column Height:9.547 ft
Total Well Penetration Depth:9.547 ft Screen Length:9.547 ft
Casing Radius:0.08333 ft Well Radius:0.08333 ft
Gravel Pack Porosity:0.
SOLUTION
Aquifer Model:Unconfined Solution Method:Bouwer-Rice
K =7.356E-5 ft/sec y0 =1.347 ft
0.200.400.600.800.1000.
0.001
0.01
0.1
1.
Time (sec)
N o r m a l i z e d
H e a d
(f t /f t )
WELL TEST ANALYSIS
Data Set:N:\...\MW-8 Slug in T2.aqt
Date:06/12/17 Time:12:06:17
PROJECT INFORMATION
Company:Terracon
Client:Wheat Ridge Brown Fields
Project:25147073
Test Well:MW-8
Test Date:4/26/17
AQUIFER DATA
Saturated Thickness:9.56 ft Anisotropy Ratio (Kz/Kr):1.
WELL DATA (MW-8)
Initial Displacement:2.451 ft Static Water Column Height:9.56 ft
Total Well Penetration Depth:9.56 ft Screen Length:9.56 ft
Casing Radius:0.08333 ft Well Radius:0.08333 ft
Gravel Pack Porosity:0.
SOLUTION
Aquifer Model:Unconfined Solution Method:Bouwer-Rice
K =7.134E-5 ft/sec y0 =1.187 ft
0.200.400.600.800.1000.
0.001
0.01
0.1
1.
Time (sec)
N o r m a l i z e d
H e a d
(f t /f t )
WELL TEST ANALYSIS
Data Set:N:\...\MW-8 Slug out T1.aqt
Date:06/12/17 Time:12:05:01
PROJECT INFORMATION
Company:Terracon
Client:Wheat Ridge Brown Fields
Project:25147073
Test Well:MW-8
Test Date:4/26/17
AQUIFER DATA
Saturated Thickness:9.547 ft Anisotropy Ratio (Kz/Kr):1.
WELL DATA (MW-8)
Initial Displacement:1.765 ft Static Water Column Height:9.547 ft
Total Well Penetration Depth:9.547 ft Screen Length:9.547 ft
Casing Radius:0.08333 ft Well Radius:0.08333 ft
Gravel Pack Porosity:0.
SOLUTION
Aquifer Model:Unconfined Solution Method:Bouwer-Rice
K =7.856E-5 ft/sec y0 =1.244 ft
0.200.400.600.800.1000.
0.001
0.01
0.1
1.
Time (sec)
N o r m a l i z e d
H e a d
(f t /f t )
WELL TEST ANALYSIS
Data Set:N:\...\MW-8 Slug out T2.aqt
Date:06/12/17 Time:12:02:34
PROJECT INFORMATION
Company:Terracon
Client:Wheat Ridge Brown Fields
Project:25147073
Test Well:MW-8
Test Date:4/26/17
AQUIFER DATA
Saturated Thickness:9.56 ft Anisotropy Ratio (Kz/Kr):1.
WELL DATA (MW-8)
Initial Displacement:1.848 ft Static Water Column Height:9.56 ft
Total Well Penetration Depth:9.56 ft Screen Length:9.56 ft
Casing Radius:0.08333 ft Well Radius:0.08333 ft
Gravel Pack Porosity:0.
SOLUTION
Aquifer Model:Unconfined Solution Method:Bouwer-Rice
K =7.268E-5 ft/sec y0 =1.825 ft
APPENDIX J
GROUNDWATER MODELING RESULTS
Natural Attenuation Interpretation Score
Screening Inadequate evidence for anaerobic biodegradation* of chlorinated organics 0 to 5
Protocol Limited evidence for anaerobic biodegradation* of chlorinated organics 6 to 14 Score:12
Adequate evidence for anaerobic biodegradation* of chlorinated organics 15 to 20
Strong evidence for anaerobic biodegradation* of chlorinated organics >20 Scroll to End of Table
Concentration in PointsAnalysisMost Contam. Zone Interpretation Yes No Awarded
Oxygen*<0.5 mg/L Tolerated, suppresses the reductive pathway at higher 3
concentrations
> 5mg/L Not tolerated; however, VC may be oxidized aerobically 0
Nitrate*<1 mg/L At higher concentrations may compete with reductive 2
pathway
Iron II*>1 mg/L Reductive pathway possible; VC may be oxidized under
Fe(III)-reducing conditions
Sulfate*<20 mg/L At higher concentrations may compete with reductive 2
pathway
Sulfide*>1 mg/L Reductive pathway possible 0
Methane*>0.5 mg/L Ultimate reductive daughter product, VC Accumulates 0
Oxidation <50 millivolts (mV) Reductive pathway possible 1
Reduction
Potential* (ORP)<-100mV Reductive pathway likely 0
pH*5 < pH < 9 Optimal range for reductive pathway 0
TOC >20 mg/L Carbon and energy source; drives dechlorination; can be
natural or anthropogenic
Temperature*>20oC At T >20oC biochemical process is accelerated 0
Carbon Dioxide >2x background Ultimate oxidative daughter product
Alkalinity >2x background Results from interaction of carbon dioxide with aquifer
minerals
Chloride*>2x background Daughter product of organic chlorine 0
Hydrogen >1 nM Reductive pathway possible, VC may accumulate
Volatile Fatty Acids >0.1 mg/L Intermediates resulting from biodegradation of aromatic
compounds; carbon and energy source
BTEX*>0.1 mg/L Carbon and energy source; drives dechlorination 0
PCE*Material released 0
TCE*Daughter product of PCE a/2
DCE*Daughter product of TCE.
If cis is greater than 80% of total DCE it is likely a daughter 2
product of TCEa/;1,1-DCE can be a chem. reaction product of TCA
VC*Daughter product of DCEa/0
1,1,1-Material released 0
Trichloroethane*
DCA Daughter product of TCA under reducing conditions 0
Carbon Material released 0
Tetrachloride
Chloroethane*Daughter product of DCA or VC under reducing conditions 0
Ethene/Ethane >0.01 mg/L Daughter product of VC/ethene 0
>0.1 mg/L Daughter product of VC/ethene 0
Chloroform Daughter product of Carbon Tetrachloride 0
Dichloromethane Daughter product of Chloroform 0
* required analysis.
a/ Points awarded only if it can be shown that the compound is a daughter product
(i.e., not a constituent of the source NAPL).
End of Form
ResetSCORE
* reductive dechlorination
The following is taken from the USEPA protocol (USEPA, 1998).The results of this scoring process have no regulatory
significance.
y = -5E-05x + 2.1953
0.10
1.00
10/23/15 1/31/16 5/10/16 8/18/16 11/26/16 3/6/17 6/14/17
C o n c e n t r a t i o n
(m g /L )
Date
Determination of ks Using PCE Concentrations in Source
Area Well MW-4
Tetrachloroethene
Linear
(Tetrachloroethene)
BIOCHLOR Natural Attenuation Decision Support System City of Wheat Ridge Data Input Instructions:
Version 2.2 Brownfields Prj 115 1. Enter value directly....or
Excel 2000 Run Name 2. Calculate by filling in gray
TYPE OF CHLORINATED SOLVENT:Ethenes 5. GENERAL 0.02 cells. Press Enter, then
Ethanes Simulation Time*2 (yr)(To restore formulas, hit "Restore Formulas" button )
1. ADVECTION Modeled Area Width*110 (ft)Variable* Data used directly in model.
Seepage Velocity*Vs 138.0 (ft/yr)Modeled Area Length*133 (ft)Test if
or Zone 1 Length*133 (ft)Biotransformation
Hydraulic Conductivity K 2.4E-03 (cm/sec)Zone 2 Length*0 (ft)is Occurring
Hydraulic Gradient i 0.0234 (ft/ft)
Effective Porosity n 0.2 (-)6. SOURCE DATA TYPE: Decaying
2. DISPERSION Single Planar
Alpha x*8.5951 (ft)
(Alpha y) / (Alpha x)*0.1 (-) Source Thickness in Sat. Zone*12 (ft)
(Alpha z) / (Alpha x)*1.E-99 (-)Y1
3. ADSORPTION Width* (ft)35Retardation Factor*R ks*
or Conc. (mg/L)*C1 (1/yr)
Soil Bulk Density, rho 1.7 (kg/L)PCE .169 0.018
FractionOrganicCarbon, foc 1.0E-3 (-)TCE .006 0.018 View of Plume Looking Down
Partition Coefficient Koc DCE .008 0.018
PCE 95 (L/kg)1.81 (-)VC .001 0.018 Observed Centerline Conc. at Monitoring Wells
TCE 61 (L/kg)1.52 (-)ETH 0 0.018
DCE 37 (L/kg)1.31 (-)
VC 22 (L/kg)1.18 (-)7. FIELD DATA FOR COMPARISON
ETH 302 (L/kg)3.57 (-)PCE Conc. (mg/L).131 .072
Common R (used in model)* =1.52 TCE Conc. (mg/L).01 .003
4. BIOTRANSFORMATION -1st Order Decay Coefficient*DCE Conc. (mg/L).018 .029
Zone 1 l (1/yr)half-life (yrs) Yield VC Conc. (mg/L)0.0 .0
PCE TCE 0.070 0.79 ETH Conc. (mg/L)0.0 .0
TCE DCE 0.050 0.74 Distance from Source (ft)0 133
DCE VC 0.180 0.64 Date Data Collected 2017
VC ETH 0.120 0.45 8. CHOOSE TYPE OF OUTPUT TO SEE:
Zone 2 l (1/yr)half-life (yrs)
PCE TCE 0.000
TCE DCE 0.000
DCE VC 0.000
VC ETH 0.000
Vertical Plane Source: Determine Source WellLocation and Input Solvent Concentrations
Paste
Restore
RUN CENTERLINE Help
Natural Attenuation
Screening Protocol
L
W
or
RUN ARRAY
Zone 2=
L - Zone 1
C
RESET
Source Options
SEE OUTPUT
l
HELP
Calc.
Alpha x
Start Here PCE
DISSOLVED SOLVENT CONCENTRATIONS IN PLUME TCE
Transverse DCE
Distance (ft)Distance from Source (ft)VC
0 13 27 40 53 67 80 93 106 120 133 ETH
44 0.000 0.000 0.000 0.000 0.000 0.001 0.002 0.003 0.003 0.004 0.004
22 0.000 0.028 0.041 0.047 0.051 0.052 0.052 0.050 0.047 0.042 0.036
0 0.165 0.164 0.161 0.156 0.148 0.139 0.128 0.116 0.103 0.088 0.072
-22 0.000 0.028 0.041 0.047 0.051 0.052 0.052 0.050 0.047 0.042 0.036
-44 0.000 0.000 0.000 0.000 0.000 0.001 0.002 0.003 0.003 0.004 0.00498.500
MASS 1.5E+2 1.2E+2 1.4E+2 1.4E+2 1.4E+2 1.4E+2 1.3E+2 1.3E+2 1.1E+2 1.0E+2 8.6E+1
RATE Displayed Compound
(mg/day)Time:1.5 yr Target Level:0.005 mg/L Displayed Model:Biotransformation PCE
Plume Mass (Order-of-Magnitude Accuracy)
Plume Mass If No Degradation 0.1 (Kg)
- Plume Mass If Biotransformation/Production 0.1 (Kg)
Mass Removed 0.0 (Kg)
% Biotransformed =+2.9%
% Change in Mass Rate =42.1 %
Current Volume of Ground Water in Plume Can't Calc.MGal
Flow Rate of Water Through Source Area 0.000 MGD
Pumping Rate (gpm)
# Pore Volumes Removed Per Yr.
# Pore Volumes to Clean-Up
Clean-Up Time (yr)
Return to InputPlot All Data Plot Data > Target Mass HELP
See
Gallons
Show No
Degradation
Show
Biotransformation
To Centerline
If "Can't Calc.",make model area
longer
44
0.000001
-44
0.00
0.02
0.04
0.06
0.08
0.10
0.12
0.14
0.16
0.18
0
1 3
2 7
4 0
5 3
6 7
8 0
9 3
1 0 6
1 2 0
1 3 3
ft.
C o n c e n t r a t i o n
(m g /L )
Distance from Source (ft.)
Compare to Pump and Treat
(source to edge)
See
acre-ft
DISSOLVED CHLORINATED SOLVENT CONCENTRATIONS ALONG PLUME CENTERLINE (mg/L) at Z=0
Distance from Source (ft)
PCE 0 13 27 40 53 67 80 93 106 120 133
No Degradation 0.165 0.165 0.163 0.159 0.152 0.143 0.133 0.121 0.107 0.092 0.076
Biotransformation 0.1646 0.164 0.161 0.156 0.148 0.139 0.128 0.116 0.103 0.088 0.072
Monitoring Well Locations (ft)
0 133
Field Data from Site 0.131 0.072
Time:
1.5 Years Return to
Input
See PCE
See TCE
See DCE
To All
0 13 27 40 53 80 93 106 120 133
0.001
0.010
0.100
1.000
0 20 40 60 80 100 120 140
C o n c e n t r a t i o n
(m g /L )
Distance From Source (ft.)
No Degradation/Production Sequential 1st Order Decay Field Data from Site
To ArrayLog LinearPrepare Animation
See VC
See ETH
BIOCHLOR Natural Attenuation Decision Support System City of Wheat Ridge Data Input Instructions:
Version 2.2 Brownfields Prj 115 1. Enter value directly....or
Excel 2000 Run Name 2. Calculate by filling in gray
TYPE OF CHLORINATED SOLVENT:Ethenes 5. GENERAL 0.02 cells. Press Enter, then
Ethanes Simulation Time*115 (yr)(To restore formulas, hit "Restore Formulas" button )
1. ADVECTION Modeled Area Width*110 (ft)Variable* Data used directly in model.
Seepage Velocity*Vs 138.0 (ft/yr)Modeled Area Length*133 (ft)Test if
or Zone 1 Length*133 (ft)Biotransformation
Hydraulic Conductivity K 2.4E-03 (cm/sec)Zone 2 Length*0 (ft)is Occurring
Hydraulic Gradient i 0.0234 (ft/ft)
Effective Porosity n 0.2 (-)6. SOURCE DATA TYPE: Decaying
2. DISPERSION Single Planar
Alpha x*8.5951 (ft)
(Alpha y) / (Alpha x)*0.1 (-) Source Thickness in Sat. Zone*12 (ft)
(Alpha z) / (Alpha x)*1.E-99 (-)Y1
3. ADSORPTION Width* (ft)35Retardation Factor*R ks*
or Conc. (mg/L)*C1 (1/yr)
Soil Bulk Density, rho 1.7 (kg/L)PCE .169 0.018
FractionOrganicCarbon, foc 1.0E-3 (-)TCE .006 0.018 View of Plume Looking Down
Partition Coefficient Koc DCE .008 0.018
PCE 95 (L/kg)1.81 (-)VC .001 0.018 Observed Centerline Conc. at Monitoring Wells
TCE 61 (L/kg)1.52 (-)ETH 0 0.018
DCE 37 (L/kg)1.31 (-)
VC 22 (L/kg)1.18 (-)7. FIELD DATA FOR COMPARISON
ETH 302 (L/kg)3.57 (-)PCE Conc. (mg/L).131 .072
Common R (used in model)* =1.52 TCE Conc. (mg/L).01 .003
4. BIOTRANSFORMATION -1st Order Decay Coefficient*DCE Conc. (mg/L).018 .029
Zone 1 l (1/yr)half-life (yrs) Yield VC Conc. (mg/L)0.0 .0
PCE TCE 0.070 0.79 ETH Conc. (mg/L)0.0 .0
TCE DCE 0.050 0.74 Distance from Source (ft)0 133
DCE VC 0.180 0.64 Date Data Collected 2017
VC ETH 0.120 0.45 8. CHOOSE TYPE OF OUTPUT TO SEE:
Zone 2 l (1/yr)half-life (yrs)
PCE TCE 0.000
TCE DCE 0.000
DCE VC 0.000
VC ETH 0.000
Vertical Plane Source: Determine Source WellLocation and Input Solvent Concentrations
Paste
Restore
RUN CENTERLINE Help
Natural Attenuation
Screening Protocol
L
W
or
RUN ARRAY
Zone 2=
L - Zone 1
C
RESET
Source Options
SEE OUTPUT
l
HELP
Calc.
Alpha x
Start Here PCE
DISSOLVED SOLVENT CONCENTRATIONS IN PLUME TCE
Transverse DCE
Distance (ft)Distance from Source (ft)VC
0 13 27 40 53 67 80 93 106 120 133 ETH
44 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.001 0.001 0.001
22 0.000 0.004 0.006 0.007 0.007 0.007 0.008 0.008 0.008 0.008 0.008
0 0.022 0.022 0.022 0.021 0.021 0.020 0.019 0.018 0.017 0.017 0.016
-22 0.000 0.004 0.006 0.007 0.007 0.007 0.008 0.008 0.008 0.008 0.008
-44 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.001 0.001 0.00198.500
MASS 2.0E+1 1.7E+1 1.9E+1 1.9E+1 2.0E+1 2.0E+1 2.0E+1 2.0E+1 2.0E+1 1.9E+1 1.9E+1
RATE Displayed Compound
(mg/day)Time:115 yr Target Level:0.005 mg/L Displayed Model:Biotransformation PCE
Plume Mass (Order-of-Magnitude Accuracy)
Plume Mass If No Degradation 0.0 (Kg)
- Plume Mass If Biotransformation/Production 0.0 (Kg)
Mass Removed 0.0 (Kg)
% Biotransformed =+3.6%
% Change in Mass Rate =4.2 %
Current Volume of Ground Water in Plume Can't Calc.MGal
Flow Rate of Water Through Source Area 0.000 MGD
Pumping Rate (gpm)
# Pore Volumes Removed Per Yr.
# Pore Volumes to Clean-Up
Clean-Up Time (yr)
Return to InputPlot All Data Plot Data > Target Mass HELP
See
Gallons
Show No
Show
Biotransformation
To Centerline
If "Can't Calc.",make model area
longer
44
0.000001
-44
0.00
0.01
0.01
0.02
0.02
0.03
0
1 3
2 7
4 0
5 3
6 7
8 0
9 3
1 0 6
1 2 0
1 3 3
ft.
C o n c e n t r a t i o n
(m g /L )
Distance from Source (ft.)
Compare to Pump and Treat
(source to edge)
See
acre-ft
DISSOLVED CHLORINATED SOLVENT CONCENTRATIONS ALONG PLUME CENTERLINE (mg/L) at Z=0
Distance from Source (ft)
PCE 0 13 27 40 53 67 80 93 106 120 133
No Degradation 0.022 0.023 0.022 0.022 0.021 0.020 0.020 0.019 0.018 0.018 0.017
Biotransformation 0.0225 0.022 0.022 0.021 0.021 0.020 0.019 0.018 0.017 0.017 0.016
Monitoring Well Locations (ft)
0 133
Field Data from Site 0.131 0.072
Time:
115.0 Years Return to
Input
See PCE
See TCE
See DCE
To All
0 13 27 40 53 80 93 106 120 133
0.001
0.010
0.100
1.000
0 20 40 60 80 100 120 140
C o n c e n t r a t i o n
(m g /L )
Distance From Source (ft.)
No Degradation/Production Sequential 1st Order Decay Field Data from Site
To ArrayLog LinearPrepare Animation
See VC
See ETH
APPENDIX K
MATERIALS MANAGEMENT PLAN
MATERIALS MANAGEMENT PLAN
City of Wheat Ridge Brownfields Remediation
7690 West 38th Avenue
Wheat Ridge, Jefferson County, Colorado
February 5, 2019
Project No.25147073
Prepared for:
Wheat Ridge Urban Renewal Authority
Wheat Ridge, Colorado
Prepared by:
Consultants, Inc.
Wheat Ridge,Colorado
TABLE OF CONTENTS
PAGE NO
GENERAL INFORMATION.......................................................................................1
PURPOSE.................................................................................................................2
MATERIALS OF CONCERN.....................................................................................3
3.1 Soil ...................................................................................................................3
3.2 Groundwater.....................................................................................................4
MATERIALS OF CONCERN MANAGEMENT..........................................................4
4.1 Soils Management............................................................................................4
4.2 Groundwater Management ...............................................................................5
SAMPLING AND ANALYSIS PLAN .........................................................................5
5.1 Soil Sampling....................................................................................................5
5.2 Groundwater Sampling .....................................................................................6
MONITORING PLAN IMPLEMENTATION................................................................6
6.1 Project Health and Safety Plan .........................................................................7
6.2 Materials Management Plan Oversight .............................................................7
6.3 Contingency Plan for Unanticipated Materials...................................................7
LIST OF EXHIBITS
Exhibit 1:Topographic Map
Exhibit 2:PCE Isoconcentration Map –4Q18 –12.20.18
LIST OF TABLES
Table 1:Summary of Detected Volatile Organic Compounds in Groundwater
Responsive ■Resourceful ■Reliable 1
MATERIALS MANAGEMENT PLAN
CITY OF WHEAT RIDGE BROWNFIELDS REMEDIATION
7690 W. 38TH AVENUE
WHEAT RIDGE,JEFFERSON COUNTY, COLORADO
February 5, 2019
Project No.25147073
GENERAL INFORMATION
The site consists of an approximately 0.552-acre parcel of land located at 7690 West 38th Avenue
(Jefferson County Parcel ID 39-262-01-001) in Wheat Ridge and Jefferson County, Colorado. The
site consists of a vacant gravel lot. A former 2,400-square-foot dry cleaner was previously
demolished as part of the previously approved Voluntary Cleanup Program (VCP)Application,
and former asphalt paving was stripped during redevelopment of the surrounding properties. The
site will be redeveloped as part of a broader community development program. The
redevelopment plan includes the construction of a new commercial building (e.g., restaurant)with
surface parking.A Topographic Map showing the site location is included as Exhibit 1 and a Site
Diagram is included as Exhibit 2.Additional information is presented in the table below:
ITEM DESCRIPTION
Site Address 7690 West 38th Avenue, Wheat Ridge, Jefferson County, Colorado
Site Area Approximately 0.552 acres per the Jefferson County Assessor
Parcel Number(s)39-262-01-001 per the Jefferson County Assessor
Current Land Use Commercial
Current Zoning MU-C (mixed use commercial) per the Jefferson County Assessor
Current Ground Cover Vacant gravel lot
Elevation/Topography Approximately 5,455 feet above sea level, sloping north to south
Proposed Construction Commercial Building
Property Owner
Wheat Ridge Urban Renewal Authority (URA)
7500 West 29th Avenue
Wheat Ridge, Colorado
Owner Representative Steve Art,Wheat Ridge URA Economic Development Manager and
Executive Director (303) 235-2806
Prepared For
Colorado Department of Public Health and Environment (CDPHE)
HMWMD-RP-B2
Attn: Mr. Fonda Apostolopoulos
4300 Cherry Creek Drive South
Denver, Colorado 80246-1530
(303) 692-3411
Materials Management Plan
Wheat Ridge Brownfields Remediation ■Wheat Ridge, Colorado
February 5, 2019 ■Terracon Project No.25147073
Responsive ■Resourceful ■Reliable 2
ITEM DESCRIPTION
Contact Person
Terracon Consultants, Inc.
Mark E. White, P.G.
10625 West I-70 Frontage Road North, Suite 3
Wheat Ridge, Colorado 80033
(303) 454-5208
Terracon Consultant’s Inc. (Terracon) has prepared this Materials Management Plan (MMP) for
the management of environmentally-impacted media that may be encountered during
redevelopment activities. Contaminants of concern (COCs)related to the former dry cleaner
include tetrachloroethene (PCE) and related breakdown products, including but not limited to
trichloroethene (TCE) and vinyl chloride (VC).
Terracon services conducted to date on this property were performed in a manner consistent with
generally accepted practices of the profession undertaken in similar studies in the same
geographical area during the same time. Terracon makes no warranties, either express or implied,
regarding findings, conclusions, or recommendations. Please note that Terracon does not warrant
the work of laboratories, regulatory agencies, or other third parties supplying information used in
the preparation of the report. This document was prepared in accordance with the scope of work
agreed to by the Wheat Ridge URA, as reflected in our proposal (25147073).
Any approaches, plans, findings, conclusions, and recommendations presented in this document
are based upon information derived from assessment and survey activities conducted by
Terracon and other environmental consultants. Such information is subject to change over time.
Certain indicators of the presence of hazardous substances, petroleum products, or other
constituents may have been latent, inaccessible, unobservable, non-detectable, or not present
during these services. We cannot represent that the site contains no hazardous substances, toxic
materials, petroleum products, or other latent conditions beyond those identified during previous
assessments conducted for the site by Terracon or others. The data, interpretations, approaches,
plans, findings, and any recommendations are based solely upon data obtained at the time and
within the scope of those services.
PURPOSE
The purpose of this MMP is to provide guidance to manage contaminated materials if encountered
during site redevelopment activities, and to communicate potential environmentally-related
incidents pertaining to construction/redevelopment activities at the site to the Owner/Owner’s
Representative.Terracon is not responsible for fulfilling current and/or future Owner’s obligations
(as Owner of the site) described in any environmental covenants, responsibilities, agreements, or
contracts associated with the site if they exist.
For purposes of this MMP, the site is defined as any area associated with the property defined
above and includes surrounding land that requires construction activity related to support of the
Materials Management Plan
Wheat Ridge Brownfields Remediation ■Wheat Ridge, Colorado
February 5, 2019 ■Terracon Project No.25147073
Responsive ■Resourceful ■Reliable 3
redevelopment plan.This would include those areas where underground utility installation and
connection is required to existing utilities that may not be physically located on the site.
MATERIALS OF CONCERN
Impacts to soil and groundwater were identified by environmental assessments conducted on the
site as summarized in the table below.
REPORT DATE
Phase I Environmental Site Assessment (ESA),
Environmental Assessment and Remediation Corporation
(EARC)
6-10-2011
Phase I ESA, Pickering, Cole, & Hivner (PCH)6-15-2012
Limited Subsurface Soil and Ground Water Investigation
for the Yelenick Trust Property (7690 West 38th Avenue
& 3790 Yukon Court)–EARC
7-5-2012
Environmental Property Investigators (EPI) Phase II ESA 6-11-2013
Phase II ESA, Family Environmental 9-27-2013
Voluntary Clean-Up Program Application, Family
Environmental
12-10-2013
Asbestos-Containing Materials Investigation, Family
Environmental
12-31-2013
Phase I ESA, RMC Consultants, Inc. (RMC)1-16-2014
Soil Excavation Letter Report, Family Environmental 1-16-2015
BOS 100®Injection Event Report, Vista Geoscience
(VGS)5-3-2015
Remedial Design Characterization Investigations, VGS 9-9-2013,11-3-2014 &
12-22-2014
Additional Site Investigation, Terracon 06-23-2018
Results of previous investigations and remediation activities were discussed in detail in the VCP
Application dated February 5, 2019.A summary of remaining environmental impacts is presented
below.
3.1 Soil
Exposure pathways for dermal contact, inhalation, and ingestion of soils is not considered
complete at the site as environmentally-impacted subsurface soil was previously excavated and
removed.
Materials Management Plan
Wheat Ridge Brownfields Remediation ■Wheat Ridge, Colorado
February 5, 2019 ■Terracon Project No.25147073
Responsive ■Resourceful ■Reliable 4
3.2 Groundwater
Quarterly groundwater monitoring at select monitoring wells has occurred at this site since March
2015.Refer to Exhibit 2 for monitoring well locations.Depth to groundwater has ranged from
approximately 7 feet below ground surface (bgs) to 13 feet bgs.Based on the December 2018
groundwater sampling event, monitoring wells MW-2, MW-4, MW-8 and MW-9 have
concentrations of PCE exceeding the CDPHE-approved Colorado Groundwater Quality
Standards (CGWQS)for the site of 17 micrograms per liter (µg/L).TCE concentrations exceed
the CGWQS in monitoring well MW-4 and MW-8.VC concentrations exceed the CGWQS in
monitoring well MW-6R.Groundwater analytical results are summarized Table 1.
Based on the COC concentrations, groundwater vapor and ingestion exposure pathways may be
complete during redevelopment activities if deep subsurface excavation (e.g., greater than five
feet bgs and/or groundwater is encountered).Groundwater may be encountered during
installation of utilities at the site, particularly the installation of pipe bedding.The construction of
certain foundation systems may also encounter groundwater.
MATERIALS OF CONCERN MANAGEMENT
It is Terracon’s understanding that construction activities will include subsurface disturbance.
Utility installation may encounter environmentally-impacted groundwater.Groundwater impacted
with VOCs was identified by environmental assessments conducted on the site.Due to the location
and history of the site, the possibility exists that additional unidentified contaminated materials
may be encountered.The sections below recommend management of groundwater and
unidentified contaminated materials,if encountered.
4.1 Soils Management
Environmentally-impacted soils were previously excavated and confirmation soil sampling with
laboratory analytical results below applicable regulatory standards was conducted.Therefore,
excavation or management of environmentally-impacted soil is not expected at this time. If
potentially environmentally-impacted soil is identified through visual or olfactory senses, the
Owner/Owner’s Representative/General Contractor shall contact the Environmental Management
Coordinator (EMC) discussed further in Section 6.2.
Any soil or other borrow material brought onto the site must be sampled and laboratory analyzed
(Priority Pollutant List unless source knowledge provides for reduction of analytical suite).Note
that this does not apply to “virgin”/first-run engineered materials provided by a commercial
aggregate or quarry.This requirement does apply, however, to any potential use of second-
run/recycled engineered fill materials (i.e., material from another construction project).
Materials Management Plan
Wheat Ridge Brownfields Remediation ■Wheat Ridge, Colorado
February 5, 2019 ■Terracon Project No.25147073
Responsive ■Resourceful ■Reliable 5
4.2 Groundwater Management
Based on the December 2018 sampling event,COC groundwater concentrations exceeding
CGWQS remain at the site.Since March 2015, the depth to groundwater has ranged from
approximately 7 feet bgs to 13 feet bgs across the site.Groundwater may be encountered during
installation of utilities at the site, particularly the installation of pipe bedding.The construction of
certain foundation systems may also encounter groundwater.If environmentally-impacted
groundwater is generated, the Owner/Owner’s Representative/General Contractor shall contact
the (EMC) discussed further in Section 6.2.A disposal characterization sample will be collected
as described below to evaluated disposal options.
SAMPLING AND ANALYSIS PLAN
This section describes sampling and analysis procedures for potential environmental sampling
during redevelopment activities.
5.1 Soil Sampling
Excavated soils that are generated from site redevelopment that show indications of potential
contamination shall be characterized and managed.. If potentially environmentally-impacted soil
is identified through visual or olfactory senses, the Owner/Owner’s Representative/General
Contractor shall contact the Environmental Management Coordinator (EMC) discussed further in
Section 6.2.Recycling/reuse of soil may be an additional/alternate method of managing soil based
on laboratory testing and approval, if necessary, by the CDPHE.The following guidelines shall
apply to environmental soil sampling:
n Soil from areas that may be potentially environmentally-impacted that may be
excavated will be observed,sampled, analyzed, and characterized to evaluated
proper handling methods and disposal.
n Excavated soils will be monitored in the field using the ambient temperature
headspace method with a PID.This method specifies that a soil sample will be
placed in a sealed plastic bag, or equivalent container, until any present VOCs
equilibrate with the headspace inside the bag.The headspace will be analyzed
using the PID.A 10 parts per million (ppm) screening level will be used to assess
potential soil contamination.
n If soil contamination is suspected based on PID measurements and/or visual
observation, then the potentially environmentally-impacted soil will be isolated by
stockpiling suspect material using 10-mil or greater plastic sheeting.Laboratory
analytical testing will indicate if the soil can be reused or if the soil needs to be
transported to an approved landfill facility for disposal.
Materials Management Plan
Wheat Ridge Brownfields Remediation ■Wheat Ridge, Colorado
February 5, 2019 ■Terracon Project No.25147073
Responsive ■Resourceful ■Reliable 6
Soil samples collected in the field will be placed directly into clean laboratory-supplied containers,
capped,labeled, and placed in ice-chilled containers for transport to a state-approved laboratory
under strict chain-of-custody protocol.Analytical results will be summarized and compared to the
current EPA RSLs and CDPHE Groundwater Protection Values and will be reported in a VCP
Completion Report prepared for CDPHE review.
If environmentally-impacted soil is encountered that requires offsite disposal, and if the landfill
determines that the soil does not meet the facility’s requirements for characterization as non-
hazardous waste, hazardous waste generator identification will be obtained,and the non-
conforming material will be transported to an appropriately permitted disposal facility.
Documentation regarding the quantities and disposition of soil will be summarized and reported
as part of the Completion Report prepared for the CDPHE at the conclusion of the on-site soil
disturbance activities.
5.2 Groundwater Sampling
The following guidelines shall apply to environmental groundwater sampling.For the purposes
of this MMP, groundwater across the site is considered to be environmentally impacted.
If environmentally-impacted groundwater is generated, the Owner/Owner’s Representative/
General Contractor shall contact the (EMC) discussed further in Section 6.2.If groundwater is
generated that requires offsite disposal, the groundwater will be observed, sampled, analyzed,
and characterized to determine proper handling methods and disposal.Groundwater samples
collected in the field will be placed directly into clean laboratory-supplied containers, capped,
labeled, and placed in ice-chilled containers for transport to a state-approved laboratory under
strict chain-of-custody protocol.Analytical results will be summarized and compared to the
CGWQS and will be reported in a VCP Completion Report prepared for CDPHE review.
If the selected disposal facility determines that the groundwater does not meet the facility’s
requirements for characterization as non-hazardous waste, hazardous waste generator
identification will be obtained,and the non-conforming material will be transported to an
appropriately permitted disposal facility.
Documentation regarding the quantities and disposition of soil groundwater will be summarized
and reported as part of the Completion Report prepared for the CDPHE at the conclusion of the
on-site groundwater generating activities.
MONITORING PLAN IMPLEMENTATION
This section outlines the activities that will be conducted to conform to the material management
strategies described above.
Materials Management Plan
Wheat Ridge Brownfields Remediation ■Wheat Ridge, Colorado
February 5, 2019 ■Terracon Project No.25147073
Responsive ■Resourceful ■Reliable 7
6.1 Project Health and Safety Plan
The risks associated with the on-site activities during redevelopment,if unanticipated materials
are found,consist primarily of worker protection during construction.The contractors performing
the work shall be provided with a copy of this MMP.The contractors shall prepare health and
safety plans (HASPs) appropriate for the work being performed.The contractors’ HASPs will be
compliant with this MMP and applicable regulations.
If unanticipated,environmentally-impacted materials are found,workers that have the potential to
be exposed to contaminants of concern must have 40-hour Occupational Safety and Health
Administration (OSHA) Hazardous Waste Operations and Emergency Response Standard
(HAZWOPER) training and 2-hour asbestos awareness training.
If unanticipated,environmentally-impacted materials are identified,workers, superintendents
and/or project managers associated with intrusive (excavation) site activity will be required to
undergo a one-time health and safety orientation meeting at the start of the project.The
Owner/Owner’s Representative/General Contractor should create a hazard communication
program as part of the normal construction activity during site preparation, excavation and any
deep foundation phases of construction.
6.2 Materials Management Plan Oversight
If groundwater is encountered, the oversight of construction activities at the site shall be
conducted by trained environmental personnel capable of executing the requirements of this MMP
during the construction work, also known as EMCs.The EMCs shall have experience in the
recognition, characterization, handling and disposition of the environmentally-impacted materials
of concern previously identified at the site.The EMCs shall be responsible for overseeing
environmentally-impacted material management activities at the site.This person shall document
the types of soil materials encountered, the location, and the handling procedures used in proper
relocation or disposal or groundwater management as may be necessary.Terracon can provide
trained EMCs upon request.
6.3 Contingency Plan for Unanticipated Materials
Due to the location and history of the site, the possibility exists that previously unidentified
contaminated materials may be encountered other than those identified and specified for special
management within this MMP.Therefore, the following contingency procedures will be enacted
in the event such materials are encountered.
If underground storage tanks (USTs)or hazards, including RACS or other environmentally-
impacted media,are detected during excavation work, the EMC shall contact the Owner/Owner’s
Representative/General Contractor and the appropriate Colorado Department of Labor and
Employment Oil and Public Safety Division (CDLE-OPS)and/or CDPHE personnel to discuss the
Materials Management Plan
Wheat Ridge Brownfields Remediation ■Wheat Ridge, Colorado
February 5, 2019 ■Terracon Project No.25147073
Responsive ■Resourceful ■Reliable 8
nature and extent of the hazard.Following this consultation, additional characterization,
excavation, and/or analyses may be required, which are beyond the scope of work of this plan.
If uncharacterized, potentially environmentally-impacted soil is encountered (based on
appearance, odors, field screening, or other indications), the General Contractor and
Owner/Owner’s Representative will be notified immediately.The waste will be left in-place and
sampled by the EMC to evaluate the potential environmental impacts and determine the proper
handling and management strategy for the material.
In the event, soils are characterized as environmentally-impacted, the soils will be managed in
accordance with the criteria outlined in this plan.Any waste materials encountered during the
project which are not specifically addressed within this MMP will be managed in accordance with
local, state, and federal requirements.
In the event that construction debris and/or RACS as defined in the CDPHE 6 CCR 1007-2
Part 1 –Regulations Pertaining To Solid Waste Sites and Facilities, Section 1.2 Definitions,
effective November 15, 2016; are encountered during development activities, it will be removed
in compliance with the CDPHE 6 CCR 1007-2 Part 1 –Regulations Pertaining To Solid Waste
Sites and Facilities and Section 5.5 (Management of Regulated Asbestos Contaminated Soil
[RACS]), effective August 19, 2014.
EXHIBITS
TOPOGRAPHIC MAP IMAGE COURTESY OF THE U.S. GEOLOGICAL SURVEY
QUADRANGLES INCLUDE: ARVADA, CO (1/1/1994) and FORT LOGAN, CO (1/1/1994).
TOPOGRAPHIC MAP
WHEAT RIDGE BROWNFIELD
7690 WEST 38TH AVENUE
WHEAT RIDGE, COLORADO
10625 W I 70 Frontage Rd N Ste 3
Wheat Ridge, CO 80033-1729
DIAGRAM IS FOR GENERAL LOCATION ONLY, AND IS NOTINTENDED FOR CONSTRUCTION PURPOSES
25147073
CPD
HNO
MEW
AS SHOWN
EX.1
06.21.2017
Scale:
1
EXHIBITProject Manager:
Drawn by:
Checked by:
Approved by:
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TABLES
Table 1
Detected Constituents in Groundwater
Wheat Ridge Brownfield Remediation
7690 West 38th Avenue
Wheat Ridge, Colorado
Terracon Project Number 25147073
PCE TCE cis-1,2-DCE
trans-1,2-
DCE VC
9/9/2013 6.3 <1.0 1.50 <1.0 <1.0
9/13/2013 5.2 <0.5 0.85 <0.5 <0.5
3/18/2015 3.5 <0.25 0.73 J <0.48 <0.45
4/5/2017 2.9 2.06 <1.0 <1.0 <1.0
11/9/2017 5.04 <1.0 <1.0 <1.0 <1.0
11/16/2017 6.73 <1.0 <1.0 <1.0 <1.0
12/1/2017 5.1 <1.0 <1.0 <1.0 <1.0
12/29/2017 2.97 <1.0 <1.0 <1.0 <1.0
1/31/2018 3.48 <1.0 <1.0 <1.0 <1.0
3/29/2018 2.56 <1.0 <1.0 <1.0 <1.0
9/6/2013 290 7.80 12.0 <1.0 4.30
9/13/2013 200 6.00 9.20 <2.5 2.70
3/18/2015 87.3 3.90 8.50 <0.48 2.30
7/31/2015 230 18.0 51.0 <0.48 3.60
10/28/2015 125 4.09 <1.0 <1.0 <1.0
2/10/2016 143 6.26 11.7 <1.0 <1.0
5/17/2016 67.5 2.31 3.05 <1.0 <1.0
8/19/2016 <1.0 <1.0
11/16/2016 43.2 1.77 5.13 <1.0 <1.0
4/5/2017 59.4 3.40 4.26 <1.0 <1.0
6/29/2017 71.5 2.84 2.92 <1.0 <1.0
9/25/2017 75.5 3.11 2.23 <1.0 <1.0
11/9/2017 50.4 1.55 1.85 <1.0 <1.0
11/16/2017 67.2 2.37 1.51 <1.0 <1.0
12/1/2017 37.7 1.46 1.55 <1.0 <1.0
12/29/2017 50 2.05 1.02 <1.0 <1.0
1/31/2018 49.8 1.91 1.02 <1.0 <1.0
3/29/2018 37.8 1.64 <1.0 <1.0 <1.0
6/25/2018 31.0 1.09 1.54 <1.0 <1.0
9/24/2018 91.0 3.63 1.14 <1.0 <1.0
12/20/2018 40.6 1.79 2.71 <1.0 <1.0
1/21/2019 41.3 1.79 <1.0 <1.0 <1.0
VOC (8260B) (µg/L)
Sample DateSample ID
MW-1
MW-2
25147073 Tables: Table 1
Page 1 of 5
2/1/2019
Table 1
Detected Constituents in Groundwater
Wheat Ridge Brownfield Remediation
7690 West 38th Avenue
Wheat Ridge, Colorado
Terracon Project Number 25147073
PCE TCE cis-1,2-DCE
trans-1,2-
DCE VC
VOC (8260B) (µg/L)
Sample DateSample ID
9/9/2013 4.9 <1.0 <1.0 <1.0 <1.0
9/13/2013 3.2 <0.5 <0.5 <0.5 <0.5
3/18/2015 3.3 0.47 J <0.31 <0.48 <0.45
4/5/2017 2.19 <1.0 <1.0 <1.0 <1.0
11/9/2017 3.49 <1.0 <1.0 <1.0 <1.0
11/16/2017 3.74 <1.0 <1.0 <1.0 <1.0
12/1/2017 2.77 <1.0 <1.0 <1.0 <1.0
12/29/2017 2.48 <1.0 <1.0 <1.0 <1.0
1/31/2018 3.14 <1.0 <1.0 <1.0 <1.0
3/29/2018 2.24 <1.0 <1.0 <1.0 <1.0
12/30/2014 1,490 31.5 300 3.51 10.4
3/18/2015 601 14.3 17.1 <0.48 0.64 J
7/31/2015 240 <0.25 8.80 <0.48 <0.45
10/28/2015 301 5.34 <1.0 <1.0 <1.0
2/10/2016 169 6.21 8.20 <1.0 <1.0
5/17/2016 136 5.45 3.08 <1.0 <1.0
8/19/2016 <1.0 <1.0 <1.0 <1.0 <1.0
11/16/2016 141 11.8 33.6 <1.0 <1.0
4/5/2017 141 12.4 17.9 <1.0 <1.0
6/29/2017 131 10.1 18.0 <1.0 <1.0
9/25/2017 103 8.83 14.9 <1.0 <1.0
11/9/2017 107 9.2 18.9 <1.0 <1.0
11/16/2017 103 9.02 13.3 <1.0 <1.0
12/1/2017 92 9.91 16.3 <1.0 <1.0
12/29/2017 84.3 7.68 10.4 <1.0 <1.0
1/31/2018 92.4 9.45 15.4 <1.0 <1.0
3/29/2018 69.3 8.11 15.4 <1.0 <1.0
6/25/2018 70.7 9.93 21.1 <1.0 <1.0
9/24/2018 97.0 10.9 18.6 <1.0 <1.0
12/20/2018 53.3 6.73 10.8 <1.0 <1.0
1/21/2019 48.8 6.13 10.9 <1.0 <1.0
MW-3
MW-4
25147073 Tables: Table 1
Page 2 of 5
2/1/2019
Table 1
Detected Constituents in Groundwater
Wheat Ridge Brownfield Remediation
7690 West 38th Avenue
Wheat Ridge, Colorado
Terracon Project Number 25147073
PCE TCE cis-1,2-DCE
trans-1,2-
DCE VC
VOC (8260B) (µg/L)
Sample DateSample ID
12/30/2014 25.4 2.55 13.6 <0.48 3.91
3/18/2015 197 18.2 116 0.86 J 26.9
7/31/2015 90 14.0 140 <0.48 7.50
10/28/2015 133 12.9 75.7 <1.0 5.43
2/10/2016 94.8 9.15 41.1 <1.0 <1.0
5/17/2016 67.4 6.31 36.7 <1.0 <1.0
8/19/2016 <1.0 <1.0 <1.0 <1.0 <1.0
11/16/2016 44.5 4.69 38.5 <1.0 <1.0
4/5/2017 27.0 3.36 34.5 <1.0 <1.0
6/29/2017 26.6 2.82 23.7 <1.0 <1.0
9/25/2017 21.3 2.35 24.6 <1.0 2.15
11/9/2017 15.8 1.86 24.4 <1.0 <1.0
11/16/2017 15.1 1.9 18.8 <1.0 <1.0
12/1/2017 12.6 1.67 20 <1.0 <1.0
12/29/2017 10.8 1.37 12.1 <1.0 <1.0
1/31/2018 10.8 1.25 9.93 <1.0 <1.0
3/29/2018 7.54 <1.0 7.72 <1.0 <1.0
6/25/2018 6.68 <1.0 6.4 <1.0 <1.0
9/24/2018 12.9 1.26 7.91 <1.0 <1.0
12/20/2018 8.08 <1.0 9.09 <1.0 <1.0
1/21/2019 5.67 <1.0 6.07 <1.0 <1.0
3/18/2015 71.7 5.00 32.2 <0.48 3.80
7/31/2015 15 <0.25 4.20 <0.48 <0.45
10/28/2015 6.9 <1.0 1.96 <1.0 <1.0
2/10/2016 18.7 <1.0 <1.0 <1.0 <1.0
5/17/2016 53.5 3.24 11.1 <1.0 <1.0
8/19/2016 <1.0 <1.0 <1.0 <1.0 <1.0
11/16/2016 4.21 <1.0 1.96 <1.0 <1.0
4/5/2017 10.7 <1.0 2.63 <1.0 <1.0
6/29/2017 52.4 4.03 12.4 <1.0 <1.0
9/25/2017 58.1 4.30 31.2 <1.0 2.20
11/9/2017 12.4 <1.0 4.52 <1.0 <1.0
11/16/2017 27.3 1.83 7.63 <1.0 <1.0
12/1/2017 10.6 <1.0 4.13 <1.0 <1.0
12/29/2017 9.53 <1.0 2.82 <1.0 <1.0
1/31/2018 9.19 <1.0 1.96 <1.0 <1.0
MW-6
MW-5
25147073 Tables: Table 1
Page 3 of 5
2/1/2019
Table 1
Detected Constituents in Groundwater
Wheat Ridge Brownfield Remediation
7690 West 38th Avenue
Wheat Ridge, Colorado
Terracon Project Number 25147073
PCE TCE cis-1,2-DCE
trans-1,2-
DCE VC
VOC (8260B) (µg/L)
Sample DateSample ID
3/29/2018
10/10/2018 <1.0 <1.0 <1.0 <1.0 7.43
12/20/2018 <1.0 <1.0 2.44 <1.0 9.61
1/21/2019 <1.0 <1.0 1.56 <1.0 3.56
3/18/2015 11.9 <0.25 1.20 <0.48 <0.45
4/5/2017 1.6 <1.0 <1.0 <1.0 <1.0
11/9/2017 3.05 <1.0 <1.0 <1.0 <1.0
11/16/2017 5.53 <1.0 <1.0 <1.0 <1.0
12/1/2017 3.56 <1.0 <1.0 <1.0 <1.0
12/29/2017 4.05 <1.0 <1.0 <1.0 <1.0
1/31/2018 5.45 <1.0 <1.0 <1.0 <1.0
3/29/2018 5.1 <1.0 <1.0 <1.0 <1.0
1/21/2019 2.89 <1.0 <1.0 <1.0 <1.0
3/18/2015 560 10.3 10.2 <0.48 <0.45
7/31/2015 310 5.6 17.0 <0.48 <0.45
10/28/2015 198 11.4 13.8 <1.0 <1.0
2/10/2016 174 10.5 11.9 <1.0 <1.0
5/17/2016 <1.0 <1.0 <1.0 <1.0 <1.0
8/19/2016 <1.0 <1.0 <1.0 <1.0 <1.0
11/16/2016 130 21.3 31.5 <1.0 <1.0
4/5/2017 92.7 13.5 12.7 <1.0 <1.0
6/29/2017 84.6 5.67 4.89 <1.0 <1.0
9/25/2017 100 10.3 8.72 <1.0 <1.0
3/29/2018 63.2 14.3 11.5 <1.0 <1.0
6/25/2018 54.9 7.64 6.59 <1.0 <1.0
9/24/2018 58.2 5.12 3.91 <1.0 <1.0
12/20/2018 47.9 8.59 8.74 <1.0 <1.0
1/21/2019 50 10.3 9.79 <1.0 <1.0
Monitoring well destroyed
MW-07
MW-8
MW-6R
25147073 Tables: Table 1
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2/1/2019
Table 1
Detected Constituents in Groundwater
Wheat Ridge Brownfield Remediation
7690 West 38th Avenue
Wheat Ridge, Colorado
Terracon Project Number 25147073
PCE TCE cis-1,2-DCE
trans-1,2-
DCE VC
VOC (8260B) (µg/L)
Sample DateSample ID
3/18/2015 195 6.6 14.4 <0.48 <0.45
4/5/2017 40.2 <1.0 <1.0 <1.0 <1.0
6/29/2017 167 3.99 1.41 <1.0 <1.0
9/22/2017 51.7 <1.0 <1.0 <1.0 <1.0
3/29/2018 26.5 <1.0 <1.0 <1.0 <1.0
6/25/2018 26.7 <1.0 <1.0 <1.0 <1.0
9/24/2018 59.8 <1.0 <1.0 <1.0 <1.0
12/20/2018 25.7 <1.0 <1.0 <1.0 <1.0
1/21/2019 21.4 <1.0 <1.0 <1.0 <1.0
Temp-1 6/23/2018 7.6 <1.0 <1.0 <1.0 <1.0
Temp-2 6/23/2018 <1.0 <1.0 <1.0 <1.0 <1.0
Temp-3 6/23/2018 3.22 <1.0 <1.0 <1.0 <1.0
17 5 70 140 2
Notes:
1) CDPHE GW Quality Standards – Regulation 41 Table A, Ground Water Organic Chemical Standards (June 30, 2016).
Bold and shaded indicates constituent in exceedance of MCL.
< : Less than analytical method detection limit
J : Result is less than the analytical method reporting limit but greater than
or equal to the analytical method detection limit and the concentration is an approximate value.
DCE = dichloroethene
µg/L : micrograms/liter
PCE = tetrachloroethene
TCE = trichloroethene
VC = vinyl chloride
VOCs : Volatile Organic Compounds
BOS injections occurred in December 2014 and February 2015.
CDPHE Reg. 41 Groundwater
Standard1
MW-9
25147073 Tables: Table 1
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