Phase II Limited Site Investigation 8800 Washington Street

Denver • Durango • Hotchkiss • Idaho www.eroresources.com

Consultants in Natural Resources and the Environment

Phase II Limited Site Investigation 8800 Washington Street Thornton, Colorado

Prepared for—

City of Thornton 9500 Civic Center Drive Thornton, Colorado 80229

Prepared by—

ERO Resources Corporation 1842 Clarkson Street Denver, Colorado 80218 (303) 830-1188ERO Project #10197

October 20, 2021

http://www.eroresources.com/


ERO Project #10197 i ERO Resources Corporation

Contents

1.0 Introduction, Purpose, and Background ............................................................................................. 1 1.1 Limitations, Exceptions, and Assumptions ....................................................................................... 1 1.2 User Reliance .................................................................................................................................... 2

2.0 Work Performed and Rationale .............................................................................................................. 2 2.1 Soil Boring and Well Installation....................................................................................................... 2 2.2 Soil Sampling .................................................................................................................................... 3 2.3 Groundwater Sampling .................................................................................................................... 3 2.4 Soil Vapor Sampling .......................................................................................................................... 4

3.0 Presentation and Evaluation of Results .................................................................................................. 4 3.1 Subsurface Conditions ...................................................................................................................... 4 3.2 Soil Sample Results ........................................................................................................................... 5 3.3 Groundwater Sample Results ........................................................................................................... 5 3.4 Soil Vapor Sample Results ................................................................................................................ 5 3.5 Data Evaluation ................................................................................................................................ 5 3.6 Investigation Derived Wastes ........................................................................................................... 6

4.0 Conclusions ............................................................................................................................................. 6

5.0 References .............................................................................................................................................. 7 Tables Table 1. Work performed and rationale. ..................................................................................................... 9

Table 2. Groundwater Measurement Data. ............................................................................................... 10

Table 3. Detected VOCs in soils (in mg/kg). ............................................................................................... 11

Table 4. Detected VOCs in groundwater (in µg/L). .................................................................................... 12

Table 5. Detected soil vapor results (VOCs in µg/m3). ............................................................................... 13

Figures Figure 1. Vicinity Map ................................................................................................................................ 14

Figure 2. Groundwater Well Locations and Groundwater Flow ................................................................ 15

Figure 3. ALTA Survey with LSI Points ........................................................................................................ 16

Appendices Appendix A Borehole Logs

Appendix B Laboratory Analytical Reports

Appendix C CDWR Documentation

Appendix D Survey Documentation

ERO Project #10197 1 ERO Resources Corporation


October 20, 2021

1.0 Introduction, Purpose, and Background

The City of Thornton retained ERO Resources Corporation (ERO) to conduct a Phase II Limited Site

Investigation (LSI) for portions of the Thornton Shopping Center property at 8800 Washington Street in

Thornton, Colorado (hereafter referred to as the property). The property is shown on Figure 1. This

report describes the purpose, objectives, methods, and results of the LSI. The purpose of the

assessment was to characterize the likely north and west boundaries of elevated tetrachloroethylene

(PCE) in soil, soil vapor and groundwater with respect to known PCE releases on the property.

Based on numerous reports dating back to at least 2006, a release of PCE associated with former dry

cleaner operations within several units on the property has resulted in PCE soil, soil vapor, and

groundwater contamination at up to two general locations on the property (Freedom Environmental

Consultants, Inc. [FEC] 2006; LT Environmental, Inc. [ LTE] 2017a, 2017b). The primary release location is

in the general location of Unit 8866 and/or 8876. In addition, a smaller secondary is suspected

associated with the former dry cleaner at Unit 8948, however the characterization of these release

locations is beyond the scope of this LSI. In general, the primary source groundwater contamination

flows to the southeast with a minor component reporting to flow easterly to northeasterly, near the

Unit 8948 location. The objective of the north and west boundary characterization is to fill data gaps

within existing documentation for upgradient impacts these releases have had to soil, groundwater and

soil vapor.

1.1 Limitations, Exceptions, and Assumptions

This investigation was conducted in general accordance with the Scope of Work provided to the City of

Thornton dated June 18, 2021 and updated in July 2021. This LSI is limited to the investigations

conducted by ERO between July and September, 2021.

The opinions and conclusions in this report are based on publicly available information and data

obtained during the course of conducting the assessment described herein at the time this LSI was

conducted. Future events or changes in publicly available information may alter the findings, opinions,

and conclusions of this report. No other warranty, expressed or implied, is made as to the professional

opinions included in this report.



1.2 User Reliance

This report is for the use and benefit of the City of Thornton and is not to be used by others without the

prior written consent of the City of Thornton or ERO.

2.0 Work Performed and Rationale

As part of this LSI, ERO supervised the drilling of seven groundwater monitoring wells (TMW-A through

TMW-G) and six soil vapor points (TVP-A through TVP-F) followed by the sampling of all installed wells

and soil vapor points as well as sampling five existing site groundwater wells (MW-1, MW-8, MW-10,

MW-17, and MW-27). ERO collected soil, soil vapor, and groundwater samples as part of this

investigation with all samples submitted to an independent laboratory for analysis by U.S.

Environmental Protection Agency (EPA) methods.

The groundwater well locations are shown on Figure 2 with both groundwater wells and soil vapor

points placed on the current ALTA survey attached as Figure 3. Site environmental reports have

consistently indicated a southeasterly groundwater flow direction (LTE 2017a, 2017b) with a slight

northeasterly flow in the eastern portion (FEC 2006). Based on this information and to meet the

objective of this LSI, groundwater monitoring wells were installed in hydraulically upgradient locations

to the north and westerly of historical source areas.

2.1 Soil Boring and Well Installation

Prior to any subsurface work, ERO notified Colorado 811 (CO811) and other appropriate entities as

directed by CO811 to locate all public and private underground utilities near the proposed subsurface

investigation locations. In addition, ERO submitted the appropriate notification and construction

reports to the Colorado Department of Natural Resources, Division of Water Resources (CDWR) of the

intent to install groundwater monitoring wells on the property (Nos. MH-62203 and MH-62407;

Appendix C).

All wells were installed using hollow-stem auger drilling technology. During drilling, continuous soil

cores were obtained using a 5-foot-long continuous sampler placed in the lead drill rod to allow for a

continuous core of the subsurface at each location. Upon completion of each 5-foot interval, the

sampler was removed, leaving the outer drill augers in the boring. The sampler was then opened,

revealing the soil core. The soils were logged for lithology, staining, and olfactory indications of

contamination, and the core was screened with a photoionization detector (PID) with a 10.6-

electronvolt lamp capable of detecting volatile organic compounds (VOCs). The sampler was then

placed back in the lead drill rod and the process was repeated.

Upon reaching the total depth of drilling, the groundwater monitoring wells consisted of new, factory-

slotted (0.010-inch), 2-inch-diameter polyvinyl chloride (PVC) and plain casing. A filter pack consisting of

10-20 graded silica sand was placed in the borehole to 2 feet above the screen interval. The annular

space in the borehole was sealed above the sand pack with a hydrated bentonite seal. The wells were



completed with a vehicle-rated manhole cover set in concrete at the surface. Well completion and

boring logs are included in Appendix A.

The soil vapor points were installed in general accordance with ASTM D7663-12 – Standard Practice for

Active Soil Gas Sampling in the Vadose Zone for Vapor Intrusion Evaluations (ASTM 2012). Soil vapor

points that were collocated with groundwater wells (Table 1) were installed with an offset from the

associated groundwater well. At each vapor point location, ERO supervised the drill rig to drill to a

depth of 5 feet bgs. The soil vapor point construction consisted of new ¼-inch Teflon® tubing connected

to a stainless-steel vapor point set within 1 foot of clean silica sand filter packed at the bottom of the

boring. The annular spacing above the sand pack was filled with a granular bentonite seal hydrated in 6-

inch lifts to the surface. The vapor points were completed with a vehicle-rated manhole cover set in

concrete at the surface. Because the vapor points were immediately adjacent to the collocated well, a

separate completion log is not included.

Groundwater monitoring wells and soil vapor points were professionally surveyed by Flatiron Surveying,

Inc. to facilitate the development of a site-wide groundwater elevation map. Survey information is

included in Appendix D.

2.2 Soil Sampling

During the drilling of the soil borings, no PID readings were noted, and no visual or olfactory indications

of contamination were observed. For this reason, ERO collected soil samples at the anticipated

groundwater table and from the total depths of the soil borings. In addition, because historical soil data

from within the former dry cleaning facility indicated varying contaminant concentrations with depth at

small intervals (LTE 2017b), soils from wells TMW-B and TMW-C were sampled at 2-foot intervals

between the approximate top of the water table (10 feet bgs) and the base of the bore. Sample depths

are shown on the boring logs in Appendix A. All samples were collected directly from the drill core

samples, labeled and placed directly in laboratory provided, certified pre-cleaned glass sample jars,

placed in an iced cooler, and submitted to Pace National laboratory in Mt. Juliet, Tennessee under chain-

of-custody protocol. All soil samples were analyzed for total VOCs by EPA method 8260.

2.3 Groundwater Sampling

The monitoring wells installed during the investigation were developed after installation by surging the

wells with 2-inch polyethylene disposable bailers and purging at least five well casing volumes from each

well. Groundwater samples were collected from each well at least three days after development. Prior

to sampling, three well-casing volumes were purged from each well using dedicated, disposable

polyethylene bailers. Groundwater samples were placed in laboratory-provided sample vials, labeled,

placed in an iced cooler, and submitted to Pace National laboratory in Mt. Juliet, Tennessee under chain-

of-custody protocol. All groundwater samples were analyzed for total VOCs by EPA method 8260. Upon

completion of the July 23 groundwater sample collection, groundwater parameters were measured in

each well using a decontaminated YSI-556 multi-parameter probe to obtain temperature, specific

conductivity, dissolved oxygen, pH, and ORP measurements. Groundwater parameters are listed in



Table 2. Groundwater from well MW-5 was not sampled because purged groundwater contained

significant black sludge, suspected to be associated with faulty or damaged well completion and unlikely

to represent site groundwater. Groundwater parameters were not able to be measured due to

damaged well casings in wells MW-5 and MW-8 and were not measured from the three wells “step-out”

wells sampled in August 2021 (MW-E, MW-F, and MW-G).

2.4 Soil Vapor Sampling

Soil vapor points were sampled on July 23, 2021 in general accordance with the procedures outlined in

the ASTM D7663-12, “Standard Practice for Active Soil Gas Sampling in the Vadose Zone for Vapor

Intrusion Evaluations” (ASTM 2012). Prior to sampling, ERO conducted the following activities for each

vapor point:

• Vapor points were tested for feasibility for collection of a soil vapor sample by inducing a vacuum and monitoring the vacuum level; and

• Leak testing was performed on each vapor point and sampling apparatus prior to sample collection. Leak testing consists of vacuum testing of sampling components and tracer gas testing using helium to test the integrity of the vapor point seal.

Upon confirmation of soil vapor point and sampling apparatus integrity, samples were collected in 1-

Liter Summa canisters with a 200-cubic-centimeter (cc)/minute maximum flow rate. The samples were

submitted to Pace National laboratory in Mt. Juliet, Tennessee under chain-of-custody protocol to be

analyzed for VOCs by EPA Method TO-15. Prior to and upon completion sample collection, soil gas

parameters were measured using a PID and a LandTec Gem5000 to measure methane, carbon

dioxide, oxygen, hydrogen sulfide, and carbon monoxide. The range of results are included in Table

5.

3.0 Presentation and Evaluation of Results

3.1 Subsurface Conditions

In general, the lithology consisted primarily of clays and sands overlying olive-brown, weathered

claystone and sandstone. No elevated PID readings, soil staining, odors, or indications of suspected

contamination were encountered during drilling.

Groundwater is encountered between 7.9 feet below ground surface (bgs) and 13.22 feet bgs when

measured prior to groundwater sampling on July 23, 2021. Groundwater depths were also measured

independent of a sampling event on August 29, 2021 with these static water levels presented in Table 2

and used for groundwater flow mapping shown on Figure 2. Groundwater elevations indicate a general

southeasterly groundwater flow direction, however an easterly component appears to be present in the

northern portion of the project area, north of the building.



3.2 Soil Sample Results

No VOCs were detected in the soil samples collected except for very low 2-butanone and methyl tert-

butyl ether (MTBE) concentrations well below the applicable Environmental Protection Agency (EPA)

Regional Screening Levels (RSLs) for soil. Detected analytes are summarized in Table 3 with laboratory

sheets included in Appendix B.

3.3 Groundwater Sample Results

No VOCs were detected above current CBGWS in the groundwater samples collected from the

monitoring wells. Detected groundwater analytes are shown in Table 4 with laboratory analytical

reports are included in Appendix B.

Because PCE was initially detected in samples from TMW-C, TMW-D, and MW-8, additional wells were

installed further upgradient in a “stepped-out” fashion to delineate the extent of detectable PCE in

groundwater. No PCE or degradation products were detected in the stepped-out wells (Table 4; TMW-E,

TMW-F, and TMW-G).

In general, groundwater sample results are consistent with historical data and surveyed groundwater

flow directions. Low PCE concentrations in TMW-C are consistent with a “fringe” area bounding the

adjunct primary source area to the south of this location. Low PCE concentrations in wells MW-8 and

TMW-D are consistent with a suspected secondary source within the northeast portion of the property.

The gasoline additive MTBE was detected in groundwater from several wells at low concentrations with

those at MW-E exceeding the Colorado Department of Labor and Employment, Division of Oil and Public

Safety (CDLE/OPS) taste and odor threshold value for MTBE of 20 µg/L (CDLE/OPS 2021).

3.4 Soil Vapor Sample Results

Table 5 lists the numerous VOCs detected in soil vapor samples collected from the property with

laboratory analytical reports included in Appendix B. Table 5 compares detected results against the

current U.S. EPA Vapor Intrusion Screening Level (VISL) values for Subslab-Near Source Soil Gas for both

commercial and residential land uses (EPA 2021).

In general, PCE and TCE were detected in soil vapor from TVP-C at a concentrations above both

commercial and industrial VISLs. Chloroform was detected in all vapor points sampled with

concentrations at TVP-C, TVP-D, and TVP-E above both commercial and industrial VISLs. Benzene was

detected in TVP-E at concentrations above both commercial and industrial VISLs.

3.5 Data Evaluation

Soil and groundwater sample results were consistent with field observations of the media sampled and

locations with respect to conditions identified in the project area. ERO reviewed laboratory case

narratives for sampling results, quality control procedures used during this assessment, and laboratory

quality control samples. Based on this review, there is no reason to suspect the laboratory data



presented in this report are not representative of site conditions. For these reasons, it is ERO’s

professional opinion that the level of investigation was appropriate for the conditions anticipated and

encountered in the project area.

3.6 Investigation Derived Wastes

Investigation derived wastes (IDW) consisted of soil cuttings, decontamination water and well

development/purge water. All IDW was containerized at the place of generation in DOT-rated 55-gallon

steel drums. Each drum was numbers and labeled with a completed Hazardous Waste label in

accordance with Colorado Hazardous Waste Regulations and stored within the Thornton Shopping

Center Facility used for IDW storage by the site remediation contractor. Laboratory data from wells

TMW-B and TMW-C were used to characterize these soils because of the number of samples from each

location. Targeted soil samples from the remaining wells were used in conjunction with composite

waste characterization samples collected from each set of soil drums generated to characterize the

remaining soil IDW. Groundwater results were used to characterize the liquid IDW. Upon receipt of

laboratory data, IDW was determined by ERO to not contain a listed hazardous waste in accordance with

CDPHE regulations and guidance and the waste was reclassified as non-hazardous waste and relabeled

accordingly. The IDW is currently stored as non-hazardous waste awaiting submittal of request for

concurrence of the waste determination for disposal by CDPHE. Upon receipt, the waste will be

disposed at a permitted Subtitle D solid waste disposal facility under non-hazardous waste manifest.

4.0 Conclusions

As part of this LSI, ERO supervised the drilling of seven groundwater monitoring wells, six soil vapor

points, and a site-wide groundwater sampling of 12 groundwater monitoring wells. Based on the

information obtained during this investigation, ERO presents the following conclusions with respect to

the objectives of this LSI:

• Neither PCE nor associated degradation products were detected in the soil sampled from borings drilled as part of this investigation, thereby providing additional data delineating the northerly and westerly extent of expected soil contamination associated with historical dry cleaning releases;

• Neither PCE nor associated degradation products were detected in groundwater from the “step-out” wells on the north side of the investigation area or on the westerly portions of this investigation, thereby delineating the northerly and westerly extent of groundwater impacts associated with historical dry cleaning releases;

• Surveyed groundwater flow directions are consistent with earlier reported groundwater flow directions to the southeast and easterly; and

• Soil vapor impacts are present within the investigation area and should be accounted for within any development scenario.



5.0 References

American Society for Testing and Materials (ASTM). 2012. D7663-12, “Standard Practice for Active Soil Gas Sampling in the Vadose Zone for Vapor Intrusion Evaluations.” June 18.

Colorado Department of Labor and Employment, Division of Oil and Public Safety (CDLE/OPS). 2021. Risked Based Screening Levels. https://ops.colorado.gov/sites/ops/files/TierI%20RBSLs.pdf.

Colorado Department of Public Health and Environment (CDPHE). 2020. Regulation No. 41 – The Basic Standards for Groundwater, Table A-Groundwater Organic Chemical Standards, and Table 3-Agricultural Standards. June 30.

Freedom Environmental Consultants, Inc. (FEC). 2006. Phase II Environmental Site Assessment, Thornton Shopping Center Property, Northeast Corner of 88th Avenue and Washington Street, Thornton, Colorado. April 7.

LT Environmental, Inc. (LTE). 2017a. Limited Site Assessment Report – Revision 1, Thornton Shopping Center, Northeast Corner of East 88th Avenue and Washington Street, Thornton, Colorado. January 11.

LT Environmental, Inc. (LTE). 2017b. Second Corrective Action Plan Modification, Thornton Shopping Center, Northeast Corner of East 88th Avenue and Washington Street, Thornton, Colorado. November 29.

U.S. Environmental Protection Agency (EPA). 2021. Vapor Intrusion Screening Levels (VISL) for Commercial Target Sub-Slab and Near-source Soil Gas Concentration. (TCR=1E-06 or THQ=0.1). https://www.epa.gov/vaporintrusion/vapor-intrusion-screening-level-calculator. October.

U.S. Environmental Protection Agency (EPA). 2021. Regional Screening Levels. https://semspub.epa.gov/work/HQ/200043.pdf. May.

https://ops.colorado.gov/sites/ops/files/TierI%20RBSLs.pdf

https://www.epa.gov/vaporintrusion/vapor-intrusion-screening-level-calculator

https://semspub.epa.gov/work/HQ/200043.pdf



Tables



Table 1. Work performed and rationale.

Feature Well/Boring Media Sampled1 Purpose

West Boundary

MW-17 GW Confirm existing groundwater data.


TMW-A, TVP-A Soil, GW Evaluate gap between MW-5 and MW-17

North Boundary




TMW-B Soil, GW Evaluate subsurface conditions at head of known PCE plume

TMW-C Soil, GW Evaluate subsurface conditions at head of known PCE plume

TMW-D Soil, GW Evaluate subsurface conditions between MW-04 and MW-08

TVP-B Soil, SV Evaluate soil vapor migration at TMW-B area

TVP-C Soil, SV Evaluate soil vapor migration at TMW-C area

TVP-D Soil, SV Evaluate soil vapor migration at MW-10 area

TVP-E Soil, SV Evaluate soil vapor migration at MW-01 area 1GW = Groundwater; SV = Soil vapor All analysis by EPA method 8260 (soil and aqueous) or TO-15 (air)



Table 2. Groundwater measurement data.

Well Depth to water

(9/29/2021)

Groundwater Parameters (July 23, 2021)

Temperature Specific Conductance Dissolved Oxygen pH ORP

Units Feet btoc Celsius mS/cm mg/L SI mV

TMW-A 13.82 16.37 5775 1.29 6.86 101.3

TMW-B 10.17 16.38 5794 0.9 7.0 122.5

TMW-C 10.23 15.36 4861 1.04 6.95 103.2

TMW-D 8.93 14.67 3594 4.09 7.05 108.4

MW-01 7.53 16.84 2617 0.24 7.38 -98.7

MW-10 10.24 16.31 6390 3.21 6.91 112.9

MW-17 11.96 16.41 5779 0.97 6.89 104.7

MW-27 9.24 16.04 6320 0.47 7.04 109.2

MW-08 8.40 NM NM NM NM NM

TMW-E 8.02 NM NM NM NM NM

TMW-F 8.72 NM NM NM NM NM

TMW-G 8.59 NM NM NM NM NM

btoc = below top of casing



Table 3. Detected VOCs in soils (in mg/kg).

Analyte EPA RSL

Sample ID

MW-A 12.5 MW-A 25 MW-D 13 MW-D 25 MW-C 14 MW-C 18 TMW-E 25 TMW-G 25

Depth (bgs) 12.5 25 13 25 14 18 25 25

2-Butanon (MEK) 27,000 0.0787 J 0.0729 J 0.0711 J 0.0889 J 0.0841 J 0.0638 J <0.100 <0.100

Methyl tert-butyl Ether (MTBE) 47 <0.00100 <0.00100 <0.00100 <0.00100 <0.00100 <0.00100 0.003 0.0015

Shaded = Analyte detected Bgs = below ground surface “<” = Analyte not detected above noted laboratory detection limit. “J” = Analyte detected at estimated concentration below laboratory reporting limit but above detection limit



Table 4. Detected VOCs in groundwater (in µg/L).

Analyte CBGWS1

Sample Name

TMW-A TMW-B TMW-C TMW-D MW-08 MW-10 MW-17 MW-G MW-E MW-F

Sampled 7/23/2021 Sampled 8/31/2021

Acetone 6,300 <50.0 <50.0 <50.0 <50.0 <50.0 <50.0 <50.0 11.9 J <50.0 <50.0

Chlorobenzene 100 <1.00 <1.00 <1.00 <1.00 0.446 J <1.00 <1.00 <1.00 <1.00 <1.00

Chloroform 3.5 0.17 J <5.00 <5.00 <5.00 <5.00 0.652 J <5.00 <5.00 <5.00 <5.00

Ethylbenzene 700 <1.00 <1.00 <1.00 <1.00 <1.00 <1.00 <1.00 <1.00 0.241 J 0.253 J

P-Isopropyltoluene NS <1.00 <1.00 <1.00 <1.00 <1.00 <1.00 <1.00 2.28 1.99 0.854 J

2-Butanone (MEK) NS <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 1.22 J <10.0 1.5 J

4-Methyl-2-Pentanone (MIBK) NS <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 <10.0 0.571 J <10.0 0.867 J

Methyl tert-butyl Ether NS <1.00 1.01 6.38 <1.00 <1.00 2.99 0.335 J 14.7 44.22 <1.00

N-Propylbenzene NS <1.00 <1.00 <1.00 <1.00 <1.00 <1.00 <1.00 0.153 J 0.135 J 0.136 J

Tetrachloroethene 17 <1.00 <1.00 6.09 14.9 0.593 J <1.00 <1.00 <1.00 <1.00 <1.00

Toluene 560 <1.00 <1.00 <1.00 <1.00 <1.00 <1.00 <1.00 0.283 J 0.32 J 0.376 J

1,2,4-Trimethylbenzene NS <1.00 <1.00 <1.00 <1.00 <1.00 <1.00 <1.00 0.355 J 0.328 J 0.529 J

1,3,5-Trimethylbenzene NS <1.00 <1.00 <1.00 <1.00 <1.00 <1.00 <1.00 0.142 J 0.149 J 0.178 J

1,2,3-Trimethylbenzene NS NA NA NA NA NA NA NA <1.00 <1.00 0.23 J

Xylenes, Total 1,400 <3.00 <3.00 <3.00 <3.00 <3.00 <3.00 <3.00 0.45 J 0.514 J 0.725 J 1Colroado Department of Public Health and Environment Regulation No. 41 – Colorado Basic Standards for Groundwater (CDPHE 2020) 2Concentration exceeds the Colorado Division of Labor and Employment (CDLE) Division of Oil and Public Safety (OPS) taste and odor threshold value of 20 µg/L (CDLE/OPS 2021). NS – No Standard; NA = Not Analyzed Shaded = Analyte detected Bold= Analyte exceeds CBGWS “<” = Analyte not detected above noted laboratory detection limit. “J” = Analyte detected at estimated concentration below laboratory reporting limit but above detection limit

Note: No VOCs were detected in groundwater samples from MW-1 and MW-27



Table 5. Detected soil vapor results (VOCs in µg/m3).

Analyte (µg/m3)

EPA VISLs1 Sample Point

TVP-A TVP-B TVP-C TVP-D TVP-E TVP-F Residential

Commercial

Acetone 107,000 451,000 25.4 54.2 64.6 144 31.8 21.6

Benzene 12 52.4 4.15 3.87 8.85 10 16.8 1.57

Carbon Disulfide 2,430 10,200 4.79 13.9 23.1 27.5 37.7 2.89

Chloroethane 34,800 146,000 <0.528 <0.528 <0.528 0.665 <0.528 <0.528

Chloroform 4.07 17.8 13.2 17.1 23.5 26.1 32.4 17.6

Chloromethane 313 1,310 1.32 1.67 1.83 2.17 1.52 1.09

Cyclohexane 20,900 87,600 6.06 6.75 29.4 60.3 6.58 7.16

1,3-Dichlorobenzene NSL NSL 3.49 2.52 2 1.95 3.26 4.33

Cis-1,2-Dichloroethene NSL NSL <0.793 <0.793 1.83 <0.793 <0.793 <0.793

Trans-1,2-Dichloroethene NSL NSL <0.793 <0.793 1.87 <0.793 2.51 <0.793

Ethanol NSL NSL 63.7 69.4 69.8 57.5 353 69.6

Ethylbenzene 37.4 164 1.7 1.19 4.27 2.43 17.6 5.77

4-Ethyltoluene NSL NSL <0.982 <0.982 <0.982 <0.982 1.54 <0.982

Trichlorofluoromethane NSL NSL 1.21 1.3 1.31 1.61 <1.12 1.2

Dichlorodifluoromethane 348 1,460 2.1 2.19 2.1 2.29 1.96 2.09

Heptane 1,390 5,840 4.17 3.72 9.28 16.1 6.54 3.33

N-Hexane 2,430 10,200 58.2 70.9 194 282 23.3 69.5

Isopropylbenzene 1,390 5,840 <0.983 <0.983 <0.983 <0.983 1.23 <0.983

Methylene chloride 2,090 8,760 6.49 3.46 6.18 6.25 4.76 6.01

2-Butanone (MEK) 17,400 73,000 <3.69 4.98 5.19 10.9 7.11 <3.69

2-Propanol 695 2,920 6.61 4.5 6.15 6.1 17.9 6.34

Propene 10,400 43,800 23.6 129 274 429 18.9 13.1

Styrene 3,480 14,600 <0.851 <0.851 0.889 <0.851 <0.851 <0.851

Tetrachloroethene 139 584 <1.36 3.86 801 4.16 12.9 6.19

Tetrahydrofuran 6,950 29,200 <0.590 2.82 <0.590 <0.590 5.34 <0.590

Toluene 17,400 73,000 15.4 11.5 30.6 28.1 192 16.6

Trichloroethene 6.95 29.2 <1.07 <1.07 41.8 <1.07 <1.07 <1.07

1,2,4-Trimethylbenzene 209 876 1.19 <0.982 2.15 1.06 4.03 1.06

1,3,5-Trimethylbenzene 209 876 <0.982 <0.982 0.996 <0.982 2.56 <0.982

2,2,4-Trimethylpentane NSL NSL 16.2 17.2 58.4 97.6 31.8 54.2

M&P-Xylene 348 1,460 3.45 2.76 7.8 4.3 22.2 6.68

O-Xylene 348 1,460 1.34 1.08 2.83 1.61 9.28 2.73

Soil Vapor Parameters

PID In parts per million (ppm) 0.0 0.0 0.0 2.5-3.2 1.6-1.7 0.0

Methane % by volume 0.0 0.0 0.0 0.0 0.0 0.0

Carbon dioxide % by volume 0.1-0.2 0.2-0.5 0.8-1.0 0.9-1.0 11.5-12 0-0.3

Oxygen % by volume 13.8-15.4 13.9-17.0 9.4-11.3 10.3-10.6 2.6-2.7 12.4-15.6

Hydrogen sulfide In ppm 0 0 0 0 0 0

Carbon monoxide In ppm 6-13 10-31 5 16 3-4 3-6 1U.S. EPA Vapor Intrusion Screening Levels (VISL) for Commercial and Residential Target Sub-Slab Near Source Soil Gas, TCR=1E-06 or THQ=0.1. October 2021. NSL – No Screening Level Shaded = Analyte detected Orange= Analyte exceeds residential screening level Blue/Bold = Analyte exceeds both residential and commercial screening levels “<” = Analyte not detected above noted laboratory reporting limit.

Property

File: 10197 Figure 1 2021.mxd [dlH]October 19, 2021

Figure 1Vicinity Map

Thornton Shopping Center Boundary Location LSI

Portions of this document include intellectual property of ESRI and its licensors and are used herein under license. Copyright © 2021 ESRI and its licensors. All rights reserved.

COLORADO

Location

Section 23, T2S, R68W; 6th PMUTM NAD 83: Zone 13N; 502054mE, 4411959mNLongitude 104.975982°W, Latitude 39.857657°NUSGS Commerce City, CO QuadrangleAdams County, Colorado ±0 2,0001,000

feet

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TMW-FPCE <1.0MW-01

PCE <1

MW-10PCE <1

TMW-GPCE <1.0

TMW-EPCE <1.0

TMW-CPCE 6.09

TMW-BPCE <1

MW-27 PCE <1

MW-17PCE <1

TMW-APCE <1

MW-08PCE 0.59 J

TMW-DPCE 14.9

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5291.5

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5290.05289.5

5292.5

F i l e : 1 0 1 9 7 F i g u r e 2 2 0 2 1 . m x d [ d l H ]O c t o b e r 1 9 , 2 0 2 1

Figure 2Groundwater PCE Concentrations and Groundwater Flow Map

Thornton Shopping Center Boundary Location LSI

Aerial Image: © Copyright Google Earth Pro 5/26/2021±0 15075

feet

Property!< Monitoring Well Location

Groundwater ContourInferred ContourDirection of Groundwater Flow

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MW-17 TMW-A

Figure 3 ERO 2021 LSI Locations

Groundwater Well

Soil Vapor Point

Note: Locations not part of base survey.

TVP-A

MW-27

TMW-B TVP-B

TMW-CTVP-C

MW-10 TVP-D

MW-01 TVP-E

MW-8TVP-F

TMW-DTMW-F

TMW-G

TMW-E


ERO Project #10197 ERO Resources Corporation

Appendix A Borehole Logs

25

20

15

10

5

0

MW-A 12.5

MW-A 25

0.4

0.4

0.4

0.4

0.4

0.4

0.4

0.4

0.4

0.4

0.4

0.4

0.4

0.4

0.4

0.4

0.7

1.3

0.4

0.4

0.4

0.4

0.4

0.4

0.4

AsphaltClay, olive brown, Fe-stained, dry

Claystone, extremely weathered, olive brown,Fe-stained, dry, friable, some fine sand and silt

Sandstone, tan to brown, hard dry, some clay,fractured, light Fe-staining

Claystone, olive brown, Fe-stained, slightymoist

Sandstone, tan to brown, clayey to silty, Festained, moist

Concrete seal

2" diameter Schedule40 PVC casing

Hydrated Bentonite

Background PID = 0.4to 0.6 ppm

10-20 filter pack sand

2" diameter, 0.010"slot, Schedule 40 PVCscreen

2" diameter Schedule40 PVC end cap

5303.14

5299.6

4411842.7

502015.8

13.82

8.25

DE

PT

H(f

eet)

SAMPLES

Num

ber

Inte

rva

l

PID

Rea

ding DESCRIPTION WELL CONSTRUCTION

DETAILS

GEOLOGIST:

PROJECT:

PROJECT LOCATION:

DRILLING CONTRACTOR:

DRILLING METHOD:

DRILLING EQUIPMENT:

DRILL DATE:

GROUND SURFACEELEVATION (ft):

NORTHING (ft.):

EASTING (ft):

DEPTH TOWATER (ft btoc):

BORINGDIAMETER (in):

Log of TMW-A

Page ofERO Resources Corporation 1 1Project No. 10197

25

20

15

10

5

0

MW-B 10

MW-B 12

MW-B 14

MW-B 16

MW-B 18

MW-B 20

MW-B 22

MW-B 25

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

AsphaltClay, dark brown, sandy (fine grain), moist

Sand, brown poorly graded (fine grain), moist

Sandstone, silty, hard lenses w/ softerinterbeds. Slightly moist. silty lenses hard,

sand is fine grained

Claystone, olive brown, soft, Fe-stained,w/occasional carbonaceous material

Sandstone, orange brown, fine grain,Fe-stained, alternating soft and hard silty layers

Concrete seal


Hydrated Bentonite




5302.57

5302.18

1191384.45

3147075.45

10.17

8.25

DE

PT

H(f

eet)

SAMPLES

Nu

mb

er

Inte

rva

l

PID

Re

ad

ing

DESCRIPTION WELL CONSTRUCTIONDETAILS

GEOLOGIST:

PROJECT:

PROJECT LOCATION:


DRILLING METHOD:

DRILLING EQUIPMENT:

DRILL DATE:


NORTHING (ft.):

EASTING (ft):



Log of TMW-B


25

20

15

10

5

0

MW-C 12

MW-C 14

MW-C 16

MW-C 18

MW-C 22

MW-C 25

0

0

0

0

0

0

0.4

0.4

0.4

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

Asphalt

Clay, olive brown, silty, sandy (fine grain), dry

Sand, tan to light brown, poorly graded (finegrain) w/ occasional coarse sand, slightly moist

Clay, light brown, sandy (fine grain), moist

Claystone, brown, sandy (fine grain), moist

Sandstone, orange brown, fine grain,Fe-stained, slightly moist, soft. Extremely hard

23-24.5 feet

Concrete seal

Hydrated Bentonite




5302.24

5298.7

1191383.43

3147152.98

10.23

8.25

DE

PT

H(f

eet)

SAMPLES

Nu

mb

er

Inte

rva

l

PID

Re

ad

ing


GEOLOGIST:

PROJECT:

PROJECT LOCATION:


DRILLING METHOD:

DRILLING EQUIPMENT:

DRILL DATE:


NORTHING (ft.):

EASTING (ft):



Log of TMW-C


25

20

15

10

5

0

MW-D 13

MW-D 25

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

AsphaltSand, dark grey to black, well graded with

gravel to 1/2" (roadbase), dry

Clay, olive brown, moist, slight Fe-staining,with discrete fine sandy inclusions. Sand (finegrained) and silt content increase with depth

Sand, tan to light brown, poorly graded (fine)silty, slightly moist

Claystone, olive brown, moist, slightFe-staining, sand (fine grained) content

increase with depth. Extremely oxidized zone18-18.5

Sand lens, fine grained, clayeyClaystone

Concrete seal


Hydrated Bentonite




5298.95

5298.67

1191464.21

3147400.29

8.93

8.25

DE

PT

H(f

eet)

SAMPLES

Nu

mb

er

Inte

rva

l

PID

Re

ad

ing


GEOLOGIST:

PROJECT:

PROJECT LOCATION:


DRILLING METHOD:

DRILLING EQUIPMENT:

DRILL DATE:


NORTHING (ft.):

EASTING (ft):



Log of TMW-D


25

20

15

10

5

0

TMW-E-18

TMW-E 25

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

Asphalt

Sand, olive brown, poorly graded, fine grained,slightly cemented in spots, moist. Cementation

increases with depth

Sandstone, olive brown, fine grained, moist

Claystone, olive grey, moist, soft, occasionalFe-staining and carbonaceous inclusions.

Hardness increases with depth

Sandstone, olive brown to gray, fine grained,clayey, moist

Concrete seal


Hydrated Bentonite




5300.34

5300.05

1191499.73

3147133.43

8.02

8.25

DE

PT

H(f

eet)

SAMPLES

Nu

mb

er

Inte

rva

l

PID

Re

ad

ing


GEOLOGIST:

PROJECT:

PROJECT LOCATION:


DRILLING METHOD:

DRILLING EQUIPMENT:

DRILL DATE:


NORTHING (ft.):

EASTING (ft):



Log of TMW-E


25

20

15

10

5

0

TMW-F 19

TMW-F 24

NM

NM

NM

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

Asphalt

Clay, brown, moist, soft

Sand, orange brown, poorly graded, finegrained, some silt, Fe-stained, trace coarse

sand

Claystone, olive brown, slightly moist, soft

Sandstone, olive brown to orange brown, finegrained, Fe-stained, moist

Claystone, olive gray, sandy, Fe-stained, lotsof carbonaceous material, moist

Concrete seal


Hydrated Bentonite




8.72

8.25

DE

PT

H(f

eet)

SAMPLES

Nu

mb

er

Inte

rva

l

PID

Re

ad

ing


GEOLOGIST:

PROJECT:

PROJECT LOCATION:


DRILLING METHOD:

DRILLING EQUIPMENT:

DRILL DATE:


NORTHING (ft.):

EASTING (ft):



Log of TMW-F


25

20

15

10

5

0

TMW-G 18.5

TMW-G 25

0

0

0

0

0

0

0

0

0

0

0

0

0.2

0

0

0

0

0

0

0

0

0

0

0

0

Asphalt

Clay, olive brown, sandy, Fe-stained, moist

Sand, tan to brown, poorly graded, finegrained, moist. Becomes clayey with depth

with increased carbonaceous inclusions

Sandy clay, olive gray, fine grained sand,Fe-stained, moist

Claystone, olive gray, sandy, Fe-stained,w/carbonaceous inclusions, moist

Sandstone, olive gray, fine grained, clayey,Fe-stained, soft

Concrete seal


Hydrated Bentonite




5300.67

5300.44

1191463.45

3147181.49

8.59

8.25

DE

PT

H(f

eet)

SAMPLES

Nu

mb

er

Inte

rva

l

PID

Re

ad

ing


GEOLOGIST:

PROJECT:

PROJECT LOCATION:


DRILLING METHOD:

DRILLING EQUIPMENT:

DRILL DATE:


NORTHING (ft.):

EASTING (ft):



Log of TMW-G




Appendix B Laboratory Analytical Reports

ANALYTICAL REPORTJuly 21 , 2021

Revised Report

ERO Resources

Sample Delivery Group: L1377626

Samples Received: 07/13/2021

Project Number: 10197

Description: Thronton SC

Report To: Jack Denman

1842 Clarkson Street

Denver, CO 80218

Entire Report Reviewed By:

July 21 , 2021

[Preliminary Report]

Chris WardPro ject Manager

Results relate only to the items tested or calibrated and are reported as rounded values. This test report shall not be reproduced, except in full, without written approval of the laboratory. Where applicable, sampling conducted by Pace Analytical National is performed per guidance provided in laboratory standard operating procedures ENV-SOP-MTJL-0067 and ENV-SOP-MTJL-0068. Where sampling conducted by the customer, results relate to the accuracy of the information provided, and as the samples are received.

Pace Analytical National12065 Lebanon Rd Mount Ju l ie t , TN 37122 615 -758-5858 800-767-5859 www.pacenat iona l . com

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ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

ERO Resources 10197 L1377626 07/21/21 17:36 1 of 69

July 22, 2021




https://www.pacenational.com

mailto:[email protected];[email protected]?subject=Pace Analytical National SDG: L1377626 - PN: 10197&body=Email regarding SDG: L1377626 - Project Number: 10197

mailto:[email protected]?subject=Pace Analytical National SDG: L1377626&body=Email regarding SDG: L1377626



TABLE OF CONTENTS

Cp: Cover Page 1

Tc: Table of Contents 2

Ss: Sample Summary 3

Cn: Case Narrative 6

Sr: Sample Results 7

MW-A 12.5 L1377626-01 7

MW-A 25 L1377626-02 9

MW-D 13 L1377626-03 11

MW-D 25 L1377626-04 13

MW-C 12 L1377626-05 15

MW-C 14 L1377626-06 17

MW-C 16 L1377626-07 19

MW-C 18 L1377626-08 21

MW-C 22 L1377626-09 23

MW-C 25 L1377626-10 25

MW-B 10 L1377626-11 27

MW-B 12 L1377626-12 29

MW-B 14 L1377626-13 31

MW-B 16 L1377626-14 33

MW-B 18 L1377626-15 35

MW-B 20 L1377626-16 37

MW-B 22 L1377626-18 39

MW-B 25 L1377626-19 41

Qc: Quality Control Summary 43

Volatile Organic Compounds (GC/MS) by Method 8260B 43

Gl: Glossary of Terms 65

Al: Accreditations & Locations 66

Sc: Sample Chain of Custody 67

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SAMPLE SUMMARY

Collected by Collected date/time Received date/time

MW-A 12.5 L1377626-01 Solid Josh Rosen 07/08/21 09:05 07/13/21 09:15

Method Batch Dilution Preparation Analysis Analyst Location

date/time date/time

Volatile Organic Compounds (GC/MS) by Method 8260B WG1705462 1 07/14/21 15:19 07/15/21 08:13 DWR Mt. Juliet, TN


MW-A 25 L1377626-02 Solid Josh Rosen 07/08/21 10:10 07/13/21 09:15


date/time date/time



MW-D 13 L1377626-03 Solid Josh Rosen 07/08/21 11:45 07/13/21 09:15


date/time date/time



MW-D 25 L1377626-04 Solid Josh Rosen 07/08/21 12:25 07/13/21 09:15


date/time date/time



MW-C 12 L1377626-05 Solid Josh Rosen 07/09/21 08:20 07/13/21 09:15


date/time date/time





date/time date/time





date/time date/time





date/time date/time


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SAMPLE SUMMARY




date/time date/time

Volatile Organic Compounds (GC/MS) by Method 8260B WG1705839 1 07/14/21 15:19 07/15/21 21:07 ACG Mt. Juliet, TN




date/time date/time



MW-B 10 L1377626-11 Solid Josh Rosen 07/09/21 10:52 07/13/21 09:15


date/time date/time





date/time date/time





date/time date/time





date/time date/time





date/time date/time





date/time date/time


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SAMPLE SUMMARY




date/time date/time

Volatile Organic Compounds (GC/MS) by Method 8260B WG1707043 1 07/16/21 20:30 07/17/21 12:13 ADM Mt. Juliet, TN




date/time date/time

Volatile Organic Compounds (GC/MS) by Method 8260B WG1707043 1 07/16/21 20:30 07/17/21 12:34 ADM Mt. Juliet, TN

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CASE NARRATIVE

All sample aliquots were received at the correct temperature, in the proper containers, with the appropriate preservatives, and within method specified holding times, unless qualified or notated withinthe report. Where applicable, all MDL (LOD) and RDL (LOQ) values reported for environmental sampleshave been corrected for the dilution factor used in the analysis. All Method and Batch Quality Control are within established criteria except where addressed in this case narrative, a non-conformance form or properly qualified within the sample results. By my digital signature below, I affirm to the best of my knowledge, all problems/anomalies observed by the laboratory as having the potential to affect the quality of the data have been identified by the laboratory, and no information or data have been knowingly withheld that would affect the quality of the data.


Chris WardPro jec t Manager

Report Revision History

Level II Report - Version 1: 07/20/21 15:44

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SAMPLE RESULTS - 01L 1 3 7 7 6 2 6

MW-A 12.5C o l l e c t e d d a t e / t i m e : 0 7 / 0 8 / 2 1 0 9 : 0 5

Volatile Organic Compounds (GC/MS) by Method 8260B

Result Qualifier MDL RDL Dilution Analysis Batch

Analyte mg/kg mg/kg mg/kg date / time

Acetone U 0.0365 0.0500 1 07/15/2021 08:13 WG1705462

Acrylonitrile U 0.00361 0.0125 1 07/15/2021 08:13 WG1705462

Benzene U 0.000467 0.00100 1 07/15/2021 08:13 WG1705462

Bromobenzene U 0.000900 0.0125 1 07/15/2021 08:13 WG1705462

Bromodichloromethane U 0.000725 0.00250 1 07/15/2021 08:13 WG1705462

Bromoform U 0.00117 0.0250 1 07/15/2021 08:13 WG1705462

Bromomethane U 0.00197 0.0125 1 07/15/2021 08:13 WG1705462

n-Butylbenzene U 0.00525 0.0125 1 07/15/2021 08:13 WG1705462

sec-Butylbenzene U 0.00288 0.0125 1 07/15/2021 08:13 WG1705462

tert-Butylbenzene U 0.00195 0.00500 1 07/15/2021 08:13 WG1705462

Carbon tetrachloride U 0.000898 0.00500 1 07/15/2021 08:13 WG1705462

Chlorobenzene U 0.000210 0.00250 1 07/15/2021 08:13 WG1705462

Chlorodibromomethane U 0.000612 0.00250 1 07/15/2021 08:13 WG1705462

Chloroethane U 0.00170 0.00500 1 07/15/2021 08:13 WG1705462

Chloroform U 0.00103 0.00250 1 07/15/2021 08:13 WG1705462

Chloromethane U 0.00435 0.0125 1 07/15/2021 08:13 WG1705462

2-Chlorotoluene U 0.000865 0.00250 1 07/15/2021 08:13 WG1705462


1,2-Dibromo-3-Chloropropane U 0.00390 0.0250 1 07/15/2021 08:13 WG1705462

1,2-Dibromoethane U 0.000648 0.00250 1 07/15/2021 08:13 WG1705462

Dibromomethane U 0.000750 0.00500 1 07/15/2021 08:13 WG1705462

1,2-Dichlorobenzene U 0.000425 0.00500 1 07/15/2021 08:13 WG1705462



Dichlorodifluoromethane U 0.00161 0.00250 1 07/15/2021 08:13 WG1705462

1,1-Dichloroethane U 0.000491 0.00250 1 07/15/2021 08:13 WG1705462


1,1-Dichloroethene U 0.000606 0.00250 1 07/15/2021 08:13 WG1705462

cis-1,2-Dichloroethene U 0.000734 0.00250 1 07/15/2021 08:13 WG1705462

trans-1,2-Dichloroethene U 0.00104 0.00500 1 07/15/2021 08:13 WG1705462

1,2-Dichloropropane U 0.00142 0.00500 1 07/15/2021 08:13 WG1705462

1,1-Dichloropropene U 0.000809 0.00250 1 07/15/2021 08:13 WG1705462


cis-1,3-Dichloropropene U 0.000757 0.00250 1 07/15/2021 08:13 WG1705462

trans-1,3-Dichloropropene U 0.00114 0.00500 1 07/15/2021 08:13 WG1705462


Di-isopropyl ether U 0.000410 0.00100 1 07/15/2021 08:13 WG1705462

Ethylbenzene U 0.000737 0.00250 1 07/15/2021 08:13 WG1705462

Hexachloro-1,3-butadiene U 0.00600 0.0250 1 07/15/2021 08:13 WG1705462

Isopropylbenzene U 0.000425 0.00250 1 07/15/2021 08:13 WG1705462

p-Isopropyltoluene U 0.00255 0.00500 1 07/15/2021 08:13 WG1705462

2-Butanone (MEK) 0.0787 J 0.0635 0.100 1 07/15/2021 08:13 WG1705462

Methylene Chloride U 0.00664 0.0250 1 07/15/2021 08:13 WG1705462

4-Methyl-2-pentanone (MIBK) U 0.00228 0.0250 1 07/15/2021 08:13 WG1705462

Methyl tert-butyl ether U 0.000350 0.00100 1 07/15/2021 08:13 WG1705462

Naphthalene U 0.00488 0.0125 1 07/15/2021 08:13 WG1705462

n-Propylbenzene U 0.000950 0.00500 1 07/15/2021 08:13 WG1705462

Styrene U 0.000229 0.0125 1 07/15/2021 08:13 WG1705462

1,1,1,2-Tetrachloroethane U 0.000948 0.00250 1 07/15/2021 08:13 WG1705462


1,1,2-Trichlorotrifluoroethane U 0.000754 0.00250 1 07/15/2021 08:13 WG1705462

Tetrachloroethene U 0.000896 0.00250 1 07/15/2021 08:13 WG1705462

Toluene U 0.00130 0.00500 1 07/15/2021 08:13 WG1705462

1,2,3-Trichlorobenzene U 0.00733 0.0125 1 07/15/2021 08:13 WG1705462


1,1,1-Trichloroethane U 0.000923 0.00250 1 07/15/2021 08:13 WG1705462

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MW-A 12.5C o l l e c t e d d a t e / t i m e : 0 7 / 0 8 / 2 1 0 9 : 0 5





Trichloroethene U 0.000584 0.00100 1 07/15/2021 08:13 WG1705462

Trichlorofluoromethane U 0.000827 0.00250 1 07/15/2021 08:13 WG1705462

1,2,3-Trichloropropane U 0.00162 0.0125 1 07/15/2021 08:13 WG1705462

1,2,4-Trimethylbenzene U 0.00158 0.00500 1 07/15/2021 08:13 WG1705462

1,2,3-Trimethylbenzene U J4 0.00158 0.00500 1 07/15/2021 08:13 WG1705462


Vinyl chloride U 0.00116 0.00250 1 07/15/2021 08:13 WG1705462

Xylenes, Total U 0.000880 0.00650 1 07/15/2021 08:13 WG1705462

(S) Toluene-d8 105 75.0-131 07/15/2021 08:13 WG1705462

(S) 4-Bromofluorobenzene 94.6 67.0-138 07/15/2021 08:13 WG1705462

(S) 1,2-Dichloroethane-d4 112 70.0-130 07/15/2021 08:13 WG1705462

1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc






MW-A 25C o l l e c t e d d a t e / t i m e : 0 7 / 0 8 / 2 1 1 0 : 1 0




Acetone U 0.0365 0.0500 1 07/15/2021 08:33 WG1705462


Benzene U 0.000467 0.00100 1 07/15/2021 08:33 WG1705462



Bromoform U 0.00117 0.0250 1 07/15/2021 08:33 WG1705462









Chloroform U 0.00103 0.00250 1 07/15/2021 08:33 WG1705462



























2-Butanone (MEK) 0.0729 J 0.0635 0.100 1 07/15/2021 08:33 WG1705462




Naphthalene U 0.00488 0.0125 1 07/15/2021 08:33 WG1705462


Styrene U 0.000229 0.0125 1 07/15/2021 08:33 WG1705462





Toluene U 0.00130 0.00500 1 07/15/2021 08:33 WG1705462




1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc






MW-A 25C o l l e c t e d d a t e / t i m e : 0 7 / 0 8 / 2 1 1 0 : 1 0













(S) Toluene-d8 104 75.0-131 07/15/2021 08:33 WG1705462



1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc






MW-D 13C o l l e c t e d d a t e / t i m e : 0 7 / 0 8 / 2 1 1 1 : 4 5




Acetone U 0.0365 0.0500 1 07/15/2021 08:52 WG1705462


Benzene U 0.000467 0.00100 1 07/15/2021 08:52 WG1705462



Bromoform U 0.00117 0.0250 1 07/15/2021 08:52 WG1705462









Chloroform U 0.00103 0.00250 1 07/15/2021 08:52 WG1705462



























2-Butanone (MEK) 0.0711 J 0.0635 0.100 1 07/15/2021 08:52 WG1705462




Naphthalene U 0.00488 0.0125 1 07/15/2021 08:52 WG1705462


Styrene U 0.000229 0.0125 1 07/15/2021 08:52 WG1705462





Toluene U 0.00130 0.00500 1 07/15/2021 08:52 WG1705462




1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc



















(S) Toluene-d8 103 75.0-131 07/15/2021 08:52 WG1705462



1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc










Acetone U 0.0365 0.0500 1 07/15/2021 09:11 WG1705462


Benzene U 0.000467 0.00100 1 07/15/2021 09:11 WG1705462



Bromoform U 0.00117 0.0250 1 07/15/2021 09:11 WG1705462









Chloroform U 0.00103 0.00250 1 07/15/2021 09:11 WG1705462



























2-Butanone (MEK) 0.0889 J 0.0635 0.100 1 07/15/2021 09:11 WG1705462




Naphthalene U 0.00488 0.0125 1 07/15/2021 09:11 WG1705462


Styrene U 0.000229 0.0125 1 07/15/2021 09:11 WG1705462





Toluene U 0.00130 0.00500 1 07/15/2021 09:11 WG1705462




1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc



















(S) Toluene-d8 103 75.0-131 07/15/2021 09:11 WG1705462



1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc






MW-C 12C o l l e c t e d d a t e / t i m e : 0 7 / 0 9 / 2 1 0 8 : 2 0




Acetone U 0.0365 0.0500 1 07/15/2021 09:30 WG1705462


Benzene U 0.000467 0.00100 1 07/15/2021 09:30 WG1705462



Bromoform U 0.00117 0.0250 1 07/15/2021 09:30 WG1705462









Chloroform U 0.00103 0.00250 1 07/15/2021 09:30 WG1705462



























2-Butanone (MEK) U 0.0635 0.100 1 07/15/2021 09:30 WG1705462




Naphthalene U 0.00488 0.0125 1 07/15/2021 09:30 WG1705462


Styrene U 0.000229 0.0125 1 07/15/2021 09:30 WG1705462





Toluene U 0.00130 0.00500 1 07/15/2021 09:30 WG1705462




1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc



















(S) Toluene-d8 101 75.0-131 07/15/2021 09:30 WG1705462



1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc










Acetone U 0.0365 0.0500 1 07/15/2021 09:49 WG1705462


Benzene U 0.000467 0.00100 1 07/15/2021 09:49 WG1705462



Bromoform U 0.00117 0.0250 1 07/15/2021 09:49 WG1705462









Chloroform U 0.00103 0.00250 1 07/15/2021 09:49 WG1705462



























2-Butanone (MEK) 0.0841 J 0.0635 0.100 1 07/15/2021 09:49 WG1705462




Naphthalene U 0.00488 0.0125 1 07/15/2021 09:49 WG1705462


Styrene U 0.000229 0.0125 1 07/15/2021 09:49 WG1705462





Toluene U 0.00130 0.00500 1 07/15/2021 09:49 WG1705462




1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc



















(S) Toluene-d8 99.6 75.0-131 07/15/2021 09:49 WG1705462



1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc










Acetone U 0.0365 0.0500 1 07/15/2021 10:08 WG1705462


Benzene U 0.000467 0.00100 1 07/15/2021 10:08 WG1705462



Bromoform U 0.00117 0.0250 1 07/15/2021 10:08 WG1705462









Chloroform U 0.00103 0.00250 1 07/15/2021 10:08 WG1705462



























2-Butanone (MEK) U 0.0635 0.100 1 07/15/2021 10:08 WG1705462




Naphthalene U 0.00488 0.0125 1 07/15/2021 10:08 WG1705462


Styrene U 0.000229 0.0125 1 07/15/2021 10:08 WG1705462





Toluene U 0.00130 0.00500 1 07/15/2021 10:08 WG1705462




1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc



















(S) Toluene-d8 103 75.0-131 07/15/2021 10:08 WG1705462



1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc










Acetone U 0.0365 0.0500 1 07/15/2021 10:28 WG1705462


Benzene U 0.000467 0.00100 1 07/15/2021 10:28 WG1705462



Bromoform U 0.00117 0.0250 1 07/15/2021 10:28 WG1705462









Chloroform U 0.00103 0.00250 1 07/15/2021 10:28 WG1705462



























2-Butanone (MEK) 0.0638 J 0.0635 0.100 1 07/15/2021 10:28 WG1705462




Naphthalene U 0.00488 0.0125 1 07/15/2021 10:28 WG1705462


Styrene U 0.000229 0.0125 1 07/15/2021 10:28 WG1705462





Toluene U 0.00130 0.00500 1 07/15/2021 10:28 WG1705462




1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc



















(S) Toluene-d8 108 75.0-131 07/15/2021 10:28 WG1705462



1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc










Acetone U 0.0365 0.0500 1 07/15/2021 21:07 WG1705839


Benzene U 0.000467 0.00100 1 07/15/2021 21:07 WG1705839



Bromoform U 0.00117 0.0250 1 07/15/2021 21:07 WG1705839









Chloroform U 0.00103 0.00250 1 07/15/2021 21:07 WG1705839



























2-Butanone (MEK) U 0.0635 0.100 1 07/15/2021 21:07 WG1705839




Naphthalene U 0.00488 0.0125 1 07/15/2021 21:07 WG1705839


Styrene U 0.000229 0.0125 1 07/15/2021 21:07 WG1705839





Toluene U 0.00130 0.00500 1 07/15/2021 21:07 WG1705839




1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc



















(S) Toluene-d8 108 75.0-131 07/15/2021 21:07 WG1705839

(S) 4-Bromofluorobenzene 103 67.0-138 07/15/2021 21:07 WG1705839

(S) 1,2-Dichloroethane-d4 77.2 70.0-130 07/15/2021 21:07 WG1705839

1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc










Acetone U J3 0.0365 0.0500 1 07/15/2021 12:17 WG1705859

Acrylonitrile U J3 0.00361 0.0125 1 07/15/2021 12:17 WG1705859

Benzene U 0.000467 0.00100 1 07/15/2021 12:17 WG1705859



Bromoform U 0.00117 0.0250 1 07/15/2021 12:17 WG1705859









Chloroform U 0.00103 0.00250 1 07/15/2021 12:17 WG1705859



























2-Butanone (MEK) U 0.0635 0.100 1 07/15/2021 12:17 WG1705859




Naphthalene U J3 0.00488 0.0125 1 07/15/2021 12:17 WG1705859


Styrene U 0.000229 0.0125 1 07/15/2021 12:17 WG1705859





Toluene U 0.00130 0.00500 1 07/15/2021 12:17 WG1705859

1,2,3-Trichlorobenzene U J3 0.00733 0.0125 1 07/15/2021 12:17 WG1705859



1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc



















(S) Toluene-d8 103 75.0-131 07/15/2021 12:17 WG1705859



1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc






MW-B 10C o l l e c t e d d a t e / t i m e : 0 7 / 0 9 / 2 1 1 0 : 5 2




Acetone U J3 0.0365 0.0500 1 07/15/2021 12:36 WG1705859


Benzene U 0.000467 0.00100 1 07/15/2021 12:36 WG1705859



Bromoform U 0.00117 0.0250 1 07/15/2021 12:36 WG1705859









Chloroform U 0.00103 0.00250 1 07/15/2021 12:36 WG1705859



























2-Butanone (MEK) U 0.0635 0.100 1 07/15/2021 12:36 WG1705859






Styrene U 0.000229 0.0125 1 07/15/2021 12:36 WG1705859





Toluene U 0.00130 0.00500 1 07/15/2021 12:36 WG1705859




1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc



















(S) Toluene-d8 104 75.0-131 07/15/2021 12:36 WG1705859



1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc










Acetone U J3 0.0365 0.0500 1 07/15/2021 12:55 WG1705859


Benzene U 0.000467 0.00100 1 07/15/2021 12:55 WG1705859



Bromoform U 0.00117 0.0250 1 07/15/2021 12:55 WG1705859









Chloroform U 0.00103 0.00250 1 07/15/2021 12:55 WG1705859



























2-Butanone (MEK) U 0.0635 0.100 1 07/15/2021 12:55 WG1705859






Styrene U 0.000229 0.0125 1 07/15/2021 12:55 WG1705859





Toluene U 0.00130 0.00500 1 07/15/2021 12:55 WG1705859




1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc



















(S) Toluene-d8 104 75.0-131 07/15/2021 12:55 WG1705859



1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc










Acetone U J3 0.0365 0.0500 1 07/15/2021 13:14 WG1705859


Benzene U 0.000467 0.00100 1 07/15/2021 13:14 WG1705859



Bromoform U 0.00117 0.0250 1 07/15/2021 13:14 WG1705859









Chloroform U 0.00103 0.00250 1 07/15/2021 13:14 WG1705859



























2-Butanone (MEK) U 0.0635 0.100 1 07/15/2021 13:14 WG1705859






Styrene U 0.000229 0.0125 1 07/15/2021 13:14 WG1705859





Toluene U 0.00130 0.00500 1 07/15/2021 13:14 WG1705859




1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc



















(S) Toluene-d8 103 75.0-131 07/15/2021 13:14 WG1705859



1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc










Acetone U J3 0.0365 0.0500 1 07/15/2021 13:33 WG1705859


Benzene U 0.000467 0.00100 1 07/15/2021 13:33 WG1705859



Bromoform U 0.00117 0.0250 1 07/15/2021 13:33 WG1705859









Chloroform U 0.00103 0.00250 1 07/15/2021 13:33 WG1705859



























2-Butanone (MEK) U 0.0635 0.100 1 07/15/2021 13:33 WG1705859






Styrene U 0.000229 0.0125 1 07/15/2021 13:33 WG1705859





Toluene U 0.00130 0.00500 1 07/15/2021 13:33 WG1705859




1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc



















(S) Toluene-d8 105 75.0-131 07/15/2021 13:33 WG1705859



1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc










Acetone U J3 0.0365 0.0500 1 07/15/2021 13:52 WG1705859


Benzene U 0.000467 0.00100 1 07/15/2021 13:52 WG1705859



Bromoform U 0.00117 0.0250 1 07/15/2021 13:52 WG1705859









Chloroform U 0.00103 0.00250 1 07/15/2021 13:52 WG1705859



























2-Butanone (MEK) U 0.0635 0.100 1 07/15/2021 13:52 WG1705859






Styrene U 0.000229 0.0125 1 07/15/2021 13:52 WG1705859





Toluene U 0.00130 0.00500 1 07/15/2021 13:52 WG1705859




1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc



















(S) Toluene-d8 106 75.0-131 07/15/2021 13:52 WG1705859



1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc










Acetone U J3 0.0365 0.0500 1 07/15/2021 14:11 WG1705859


Benzene U 0.000467 0.00100 1 07/15/2021 14:11 WG1705859



Bromoform U 0.00117 0.0250 1 07/15/2021 14:11 WG1705859









Chloroform U 0.00103 0.00250 1 07/15/2021 14:11 WG1705859



























2-Butanone (MEK) U 0.0635 0.100 1 07/15/2021 14:11 WG1705859






Styrene U 0.000229 0.0125 1 07/15/2021 14:11 WG1705859





Toluene U 0.00130 0.00500 1 07/15/2021 14:11 WG1705859




1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc



















(S) Toluene-d8 104 75.0-131 07/15/2021 14:11 WG1705859



1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc










Acetone U J4 0.0365 0.0500 1 07/17/2021 12:13 WG1707043


Benzene U J3 0.000467 0.00100 1 07/17/2021 12:13 WG1707043



Bromoform U 0.00117 0.0250 1 07/17/2021 12:13 WG1707043

Bromomethane U J3 0.00197 0.0125 1 07/17/2021 12:13 WG1707043

n-Butylbenzene U J3 0.00525 0.0125 1 07/17/2021 12:13 WG1707043

sec-Butylbenzene U J3 0.00288 0.0125 1 07/17/2021 12:13 WG1707043

tert-Butylbenzene U J3 0.00195 0.00500 1 07/17/2021 12:13 WG1707043

Carbon tetrachloride U J3 0.000898 0.00500 1 07/17/2021 12:13 WG1707043



Chloroethane U J3 0.00170 0.00500 1 07/17/2021 12:13 WG1707043

Chloroform U 0.00103 0.00250 1 07/17/2021 12:13 WG1707043

Chloromethane U J3 0.00435 0.0125 1 07/17/2021 12:13 WG1707043

2-Chlorotoluene U J3 0.000865 0.00250 1 07/17/2021 12:13 WG1707043








Dichlorodifluoromethane U J3 0.00161 0.00250 1 07/17/2021 12:13 WG1707043

1,1-Dichloroethane U J3 0.000491 0.00250 1 07/17/2021 12:13 WG1707043


1,1-Dichloroethene U J3 0.000606 0.00250 1 07/17/2021 12:13 WG1707043


trans-1,2-Dichloroethene U J3 0.00104 0.00500 1 07/17/2021 12:13 WG1707043


1,1-Dichloropropene U J3 0.000809 0.00250 1 07/17/2021 12:13 WG1707043




2,2-Dichloropropane U J3 0.00138 0.00250 1 07/17/2021 12:13 WG1707043


Ethylbenzene U J3 0.000737 0.00250 1 07/17/2021 12:13 WG1707043

Hexachloro-1,3-butadiene U J3 0.00600 0.0250 1 07/17/2021 12:13 WG1707043

Isopropylbenzene U J3 0.000425 0.00250 1 07/17/2021 12:13 WG1707043

p-Isopropyltoluene U J3 0.00255 0.00500 1 07/17/2021 12:13 WG1707043

2-Butanone (MEK) U J4 0.0635 0.100 1 07/17/2021 12:13 WG1707043




Naphthalene U 0.00488 0.0125 1 07/17/2021 12:13 WG1707043

n-Propylbenzene U J3 0.000950 0.00500 1 07/17/2021 12:13 WG1707043

Styrene U 0.000229 0.0125 1 07/17/2021 12:13 WG1707043



1,1,2-Trichlorotrifluoroethane U J3 0.000754 0.00250 1 07/17/2021 12:13 WG1707043

Tetrachloroethene U J3 0.000896 0.00250 1 07/17/2021 12:13 WG1707043

Toluene U J3 0.00130 0.00500 1 07/17/2021 12:13 WG1707043



1,1,1-Trichloroethane U J3 0.000923 0.00250 1 07/17/2021 12:13 WG1707043

1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc











Trichloroethene U J3 0.000584 0.00100 1 07/17/2021 12:13 WG1707043

Trichlorofluoromethane U J3 0.000827 0.00250 1 07/17/2021 12:13 WG1707043





Vinyl chloride U J3 0.00116 0.00250 1 07/17/2021 12:13 WG1707043


(S) Toluene-d8 99.0 75.0-131 07/17/2021 12:13 WG1707043



1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc










Acetone U J3 J4 0.0365 0.0500 1 07/17/2021 12:34 WG1707043


Benzene U 0.000467 0.00100 1 07/17/2021 12:34 WG1707043



Bromoform U 0.00117 0.0250 1 07/17/2021 12:34 WG1707043









Chloroform U 0.00103 0.00250 1 07/17/2021 12:34 WG1707043



























2-Butanone (MEK) U J4 0.0635 0.100 1 07/17/2021 12:34 WG1707043




Naphthalene U 0.00488 0.0125 1 07/17/2021 12:34 WG1707043


Styrene U 0.000229 0.0125 1 07/17/2021 12:34 WG1707043





Toluene U 0.00130 0.00500 1 07/17/2021 12:34 WG1707043




1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc



















(S) Toluene-d8 99.3 75.0-131 07/17/2021 12:34 WG1707043



1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc





QUALITY CONTROL SUMMARYWG1705462V o l a t i l e O r g a n i c C o m p o u n d s ( G C / M S ) b y M e t h o d 8 2 6 0 B L 1 3 7 7 6 2 6 - 0 1 , 0 2 , 0 3 , 0 4 , 0 5 , 0 6 , 0 7 , 0 8

Method Blank (MB)

(MB) R3681629-2 07/15/21 03:31

MB Result MB Qualifier MB MDL MB RDL

Analyte mg/kg mg/kg mg/kg

Acetone U 0.0365 0.0500

Acrylonitrile U 0.00361 0.0125

Benzene U 0.000467 0.00100

Bromobenzene U 0.000900 0.0125

Bromodichloromethane U 0.000725 0.00250

Bromoform U 0.00117 0.0250

Bromomethane U 0.00197 0.0125

n-Butylbenzene U 0.00525 0.0125

sec-Butylbenzene U 0.00288 0.0125

tert-Butylbenzene U 0.00195 0.00500

Carbon tetrachloride U 0.000898 0.00500

Chlorobenzene U 0.000210 0.00250

Chlorodibromomethane U 0.000612 0.00250

Chloroethane U 0.00170 0.00500

Chloroform U 0.00103 0.00250

Chloromethane U 0.00435 0.0125

2-Chlorotoluene U 0.000865 0.00250


1,2-Dibromo-3-Chloropropane U 0.00390 0.0250

1,2-Dibromoethane U 0.000648 0.00250

Dibromomethane U 0.000750 0.00500

1,2-Dichlorobenzene U 0.000425 0.00500



Dichlorodifluoromethane U 0.00161 0.00250

1,1-Dichloroethane U 0.000491 0.00250


1,1-Dichloroethene U 0.000606 0.00250

cis-1,2-Dichloroethene U 0.000734 0.00250

trans-1,2-Dichloroethene U 0.00104 0.00500

1,2-Dichloropropane U 0.00142 0.00500

1,1-Dichloropropene U 0.000809 0.00250


cis-1,3-Dichloropropene U 0.000757 0.00250

trans-1,3-Dichloropropene U 0.00114 0.00500


Di-isopropyl ether U 0.000410 0.00100

Ethylbenzene U 0.000737 0.00250

Hexachloro-1,3-butadiene U 0.00600 0.0250

Isopropylbenzene U 0.000425 0.00250

1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc






Method Blank (MB)

(MB) R3681629-2 07/15/21 03:31



p-Isopropyltoluene U 0.00255 0.00500

2-Butanone (MEK) U 0.0635 0.100

Methylene Chloride U 0.00664 0.0250

4-Methyl-2-pentanone (MIBK) U 0.00228 0.0250

Methyl tert-butyl ether U 0.000350 0.00100

Naphthalene U 0.00488 0.0125

n-Propylbenzene U 0.000950 0.00500

Styrene U 0.000229 0.0125

1,1,1,2-Tetrachloroethane U 0.000948 0.00250


Tetrachloroethene U 0.000896 0.00250

Toluene U 0.00130 0.00500

1,1,2-Trichlorotrifluoroethane U 0.000754 0.00250

1,2,3-Trichlorobenzene U 0.00733 0.0125


1,1,1-Trichloroethane U 0.000923 0.00250


Trichloroethene U 0.000584 0.00100

Trichlorofluoromethane U 0.000827 0.00250

1,2,3-Trichloropropane U 0.00162 0.0125

1,2,3-Trimethylbenzene U 0.00158 0.00500



Vinyl chloride U 0.00116 0.00250

Xylenes, Total U 0.000880 0.00650

(S) Toluene-d8 105 75.0-131

(S) 4-Bromofluorobenzene 95.1 67.0-138

(S) 1,2-Dichloroethane-d4 112 70.0-130

Laboratory Control Sample (LCS)

(LCS) R3681629-1 07/15/21 02:33

Spike Amount LCS Result LCS Rec. Rec. Limits LCS Qualifier

Analyte mg/kg mg/kg % %

Acetone 0.625 0.616 98.6 10.0-160

Acrylonitrile 0.625 0.775 124 45.0-153

Benzene 0.125 0.123 98.4 70.0-123

Bromobenzene 0.125 0.143 114 73.0-121

Bromodichloromethane 0.125 0.126 101 73.0-121

1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc







(LCS) R3681629-1 07/15/21 02:33



Bromoform 0.125 0.117 93.6 64.0-132

Bromomethane 0.125 0.108 86.4 56.0-147

n-Butylbenzene 0.125 0.110 88.0 68.0-135

sec-Butylbenzene 0.125 0.132 106 74.0-130

tert-Butylbenzene 0.125 0.143 114 75.0-127

Carbon tetrachloride 0.125 0.129 103 66.0-128

Chlorobenzene 0.125 0.118 94.4 76.0-128

Chlorodibromomethane 0.125 0.117 93.6 74.0-127

Chloroethane 0.125 0.134 107 61.0-134

Chloroform 0.125 0.136 109 72.0-123

Chloromethane 0.125 0.119 95.2 51.0-138

2-Chlorotoluene 0.125 0.138 110 75.0-124

4-Chlorotoluene 0.125 0.124 99.2 75.0-124

1,2-Dibromo-3-Chloropropane 0.125 0.0983 78.6 59.0-130

1,2-Dibromoethane 0.125 0.125 100 74.0-128

Dibromomethane 0.125 0.131 105 75.0-122

1,2-Dichlorobenzene 0.125 0.136 109 76.0-124



Dichlorodifluoromethane 0.125 0.103 82.4 43.0-156

1,1-Dichloroethane 0.125 0.134 107 70.0-127

1,2-Dichloroethane 0.125 0.148 118 65.0-131

1,1-Dichloroethene 0.125 0.130 104 65.0-131

cis-1,2-Dichloroethene 0.125 0.120 96.0 73.0-125

trans-1,2-Dichloroethene 0.125 0.110 88.0 71.0-125

1,2-Dichloropropane 0.125 0.131 105 74.0-125

1,1-Dichloropropene 0.125 0.125 100 73.0-125


cis-1,3-Dichloropropene 0.125 0.131 105 76.0-127

trans-1,3-Dichloropropene 0.125 0.115 92.0 73.0-127


Di-isopropyl ether 0.125 0.122 97.6 60.0-136

Ethylbenzene 0.125 0.107 85.6 74.0-126

Hexachloro-1,3-butadiene 0.125 0.101 80.8 57.0-150

Isopropylbenzene 0.125 0.122 97.6 72.0-127

p-Isopropyltoluene 0.125 0.119 95.2 72.0-133

2-Butanone (MEK) 0.625 0.841 135 30.0-160

Methylene Chloride 0.125 0.124 99.2 68.0-123

4-Methyl-2-pentanone (MIBK) 0.625 0.751 120 56.0-143

Methyl tert-butyl ether 0.125 0.153 122 66.0-132

1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc







(LCS) R3681629-1 07/15/21 02:33



Naphthalene 0.125 0.0971 77.7 59.0-130

n-Propylbenzene 0.125 0.134 107 74.0-126

Styrene 0.125 0.111 88.8 72.0-127

1,1,1,2-Tetrachloroethane 0.125 0.123 98.4 74.0-129


Tetrachloroethene 0.125 0.133 106 70.0-136

Toluene 0.125 0.119 95.2 75.0-121

1,1,2-Trichlorotrifluoroethane 0.125 0.134 107 61.0-139

1,2,3-Trichlorobenzene 0.125 0.108 86.4 59.0-139


1,1,1-Trichloroethane 0.125 0.130 104 69.0-126

1,1,2-Trichloroethane 0.125 0.138 110 78.0-123

Trichloroethene 0.125 0.128 102 76.0-126

Trichlorofluoromethane 0.125 0.124 99.2 61.0-142

1,2,3-Trichloropropane 0.125 0.148 118 67.0-129

1,2,3-Trimethylbenzene 0.125 0.168 134 74.0-124 J4

1,2,4-Trimethylbenzene 0.125 0.131 105 70.0-126

1,3,5-Trimethylbenzene 0.125 0.117 93.6 73.0-127

Vinyl chloride 0.125 0.122 97.6 63.0-134

Xylenes, Total 0.375 0.342 91.2 72.0-127

(S) Toluene-d8 99.9 75.0-131



1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc





QUALITY CONTROL SUMMARYWG1705839V o l a t i l e O r g a n i c C o m p o u n d s ( G C / M S ) b y M e t h o d 8 2 6 0 B L 1 3 7 7 6 2 6 - 0 9

Method Blank (MB)

(MB) R3680029-2 07/15/21 11:39



Acetone U 0.0365 0.0500


Benzene U 0.000467 0.00100



Bromoform U 0.00117 0.0250









Chloroform U 0.00103 0.00250





1,2-Dibromoethane U 0.000648 0.00250





















1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc






Method Blank (MB)

(MB) R3680029-2 07/15/21 11:39




2-Butanone (MEK) 0.0691 J 0.0635 0.100






Styrene U 0.000229 0.0125




Toluene U 0.00130 0.00500













Xylenes, Total U 0.000880 0.00650

(S) Toluene-d8 109 75.0-131

(S) 4-Bromofluorobenzene 103 67.0-138

(S) 1,2-Dichloroethane-d4 77.9 70.0-130

Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD)

(LCS) R3680029-1 07/15/21 10:41 • (LCSD) R3680029-3 07/15/21 14:25

Spike Amount LCS Result LCSD Result LCS Rec. LCSD Rec. Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits

Analyte mg/kg mg/kg mg/kg % % % % %

Acetone 0.625 0.469 0.606 75.0 97.0 10.0-160 25.5 31

Acrylonitrile 0.625 0.605 0.611 96.8 97.8 45.0-153 0.987 22

Benzene 0.125 0.122 0.125 97.6 100 70.0-123 2.43 20

Bromobenzene 0.125 0.129 0.126 103 101 73.0-121 2.35 20

Bromodichloromethane 0.125 0.118 0.120 94.4 96.0 73.0-121 1.68 20

1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc







(LCS) R3680029-1 07/15/21 10:41 • (LCSD) R3680029-3 07/15/21 14:25



Bromoform 0.125 0.125 0.136 100 109 64.0-132 8.43 20

Bromomethane 0.125 0.117 0.102 93.6 81.6 56.0-147 13.7 20

n-Butylbenzene 0.125 0.120 0.124 96.0 99.2 68.0-135 3.28 20

sec-Butylbenzene 0.125 0.125 0.127 100 102 74.0-130 1.59 20

tert-Butylbenzene 0.125 0.121 0.126 96.8 101 75.0-127 4.05 20

Carbon tetrachloride 0.125 0.120 0.125 96.0 100 66.0-128 4.08 20

Chlorobenzene 0.125 0.135 0.141 108 113 76.0-128 4.35 20

Chlorodibromomethane 0.125 0.134 0.138 107 110 74.0-127 2.94 20

Chloroethane 0.125 0.109 0.117 87.2 93.6 61.0-134 7.08 20

Chloroform 0.125 0.115 0.119 92.0 95.2 72.0-123 3.42 20

Chloromethane 0.125 0.0977 0.105 78.2 84.0 51.0-138 7.20 20

2-Chlorotoluene 0.125 0.125 0.128 100 102 75.0-124 2.37 20

4-Chlorotoluene 0.125 0.115 0.116 92.0 92.8 75.0-124 0.866 20

1,2-Dibromo-3-Chloropropane 0.125 0.118 0.131 94.4 105 59.0-130 10.4 20

1,2-Dibromoethane 0.125 0.135 0.141 108 113 74.0-128 4.35 20

Dibromomethane 0.125 0.119 0.128 95.2 102 75.0-122 7.29 20

1,2-Dichlorobenzene 0.125 0.120 0.124 96.0 99.2 76.0-124 3.28 20

1,3-Dichlorobenzene 0.125 0.130 0.132 104 106 76.0-125 1.53 20

1,4-Dichlorobenzene 0.125 0.124 0.128 99.2 102 77.0-121 3.17 20

Dichlorodifluoromethane 0.125 0.0983 0.101 78.6 80.8 43.0-156 2.71 20

1,1-Dichloroethane 0.125 0.116 0.124 92.8 99.2 70.0-127 6.67 20

1,2-Dichloroethane 0.125 0.108 0.111 86.4 88.8 65.0-131 2.74 20

1,1-Dichloroethene 0.125 0.114 0.121 91.2 96.8 65.0-131 5.96 20

cis-1,2-Dichloroethene 0.125 0.134 0.139 107 111 73.0-125 3.66 20

trans-1,2-Dichloroethene 0.125 0.127 0.132 102 106 71.0-125 3.86 20

1,2-Dichloropropane 0.125 0.128 0.128 102 102 74.0-125 0.000 20

1,1-Dichloropropene 0.125 0.118 0.124 94.4 99.2 73.0-125 4.96 20

1,3-Dichloropropane 0.125 0.125 0.124 100 99.2 80.0-125 0.803 20

cis-1,3-Dichloropropene 0.125 0.119 0.117 95.2 93.6 76.0-127 1.69 20

trans-1,3-Dichloropropene 0.125 0.121 0.119 96.8 95.2 73.0-127 1.67 20

2,2-Dichloropropane 0.125 0.112 0.112 89.6 89.6 59.0-135 0.000 20

Di-isopropyl ether 0.125 0.105 0.109 84.0 87.2 60.0-136 3.74 20

Ethylbenzene 0.125 0.135 0.140 108 112 74.0-126 3.64 20

Hexachloro-1,3-butadiene 0.125 0.118 0.142 94.4 114 57.0-150 18.5 20

Isopropylbenzene 0.125 0.139 0.142 111 114 72.0-127 2.14 20

p-Isopropyltoluene 0.125 0.126 0.132 101 106 72.0-133 4.65 20

2-Butanone (MEK) 0.625 0.532 0.512 85.1 81.9 30.0-160 3.83 24

Methylene Chloride 0.125 0.141 0.140 113 112 68.0-123 0.712 20

4-Methyl-2-pentanone (MIBK) 0.625 0.549 0.561 87.8 89.8 56.0-143 2.16 20

Methyl tert-butyl ether 0.125 0.106 0.108 84.8 86.4 66.0-132 1.87 20

1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc







(LCS) R3680029-1 07/15/21 10:41 • (LCSD) R3680029-3 07/15/21 14:25



Naphthalene 0.125 0.117 0.130 93.6 104 59.0-130 10.5 20

n-Propylbenzene 0.125 0.118 0.120 94.4 96.0 74.0-126 1.68 20

Styrene 0.125 0.133 0.138 106 110 72.0-127 3.69 20

1,1,1,2-Tetrachloroethane 0.125 0.134 0.144 107 115 74.0-129 7.19 20

1,1,2,2-Tetrachloroethane 0.125 0.115 0.114 92.0 91.2 68.0-128 0.873 20

Tetrachloroethene 0.125 0.147 0.156 118 125 70.0-136 5.94 20

Toluene 0.125 0.129 0.136 103 109 75.0-121 5.28 20

1,1,2-Trichlorotrifluoroethane 0.125 0.121 0.123 96.8 98.4 61.0-139 1.64 20

1,2,3-Trichlorobenzene 0.125 0.128 0.149 102 119 59.0-139 15.2 20


1,1,1-Trichloroethane 0.125 0.117 0.120 93.6 96.0 69.0-126 2.53 20

1,1,2-Trichloroethane 0.125 0.133 0.136 106 109 78.0-123 2.23 20

Trichloroethene 0.125 0.128 0.141 102 113 76.0-126 9.67 20

Trichlorofluoromethane 0.125 0.101 0.104 80.8 83.2 61.0-142 2.93 20

1,2,3-Trichloropropane 0.125 0.112 0.113 89.6 90.4 67.0-129 0.889 20

1,2,3-Trimethylbenzene 0.125 0.115 0.116 92.0 92.8 74.0-124 0.866 20



Vinyl chloride 0.125 0.124 0.136 99.2 109 63.0-134 9.23 20

Xylenes, Total 0.375 0.373 0.424 99.5 113 72.0-127 12.8 20

(S) Toluene-d8 107 107 75.0-131

(S) 4-Bromofluorobenzene 104 105 67.0-138

(S) 1,2-Dichloroethane-d4 82.0 83.0 70.0-130

Original Sample (OS) • Matrix Spike (MS) • Matrix Spike Duplicate (MSD)

(OS) • (MS) R3680029-4 07/15/21 21:27 • (MSD) R3680029-5 07/15/21 21:46

Spike Amount Original Result MS Result MSD Result MS Rec. MSD Rec. Dilution Rec. Limits MS Qualifier MSD Qualifier RPD RPD Limits


Acrylonitrile 0.625 0.387 0.506 61.9 81.0 1 10.0-160 26.7 40

Acetone 0.625 0.207 0.237 33.1 37.9 1 10.0-160 13.5 40

Benzene 0.125 0.0657 0.0967 52.6 77.4 1 10.0-149 J3 38.2 37

Bromobenzene 0.125 0.0840 0.112 67.2 89.6 1 10.0-156 28.6 38

Bromodichloromethane 0.125 0.0750 0.0967 60.0 77.4 1 10.0-143 25.3 37

Di-isopropyl ether 0.125 0.0682 0.0893 54.6 71.4 1 10.0-147 26.8 36

Bromoform 0.125 0.0987 0.105 79.0 84.0 1 10.0-146 6.19 36

Bromomethane 0.125 0.0316 0.0437 25.3 35.0 1 10.0-149 32.1 38

n-Butylbenzene 0.125 0.0760 0.0965 60.8 77.2 1 10.0-160 23.8 40

sec-Butylbenzene 0.125 0.0769 0.103 61.5 82.4 1 10.0-159 29.0 39

1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc







(OS) • (MS) R3680029-4 07/15/21 21:27 • (MSD) R3680029-5 07/15/21 21:46



tert-Butylbenzene 0.125 0.0739 0.101 59.1 80.8 1 10.0-156 31.0 39

Carbon tetrachloride 0.125 0.0554 0.0880 44.3 70.4 1 10.0-145 J3 45.5 37

Chlorobenzene 0.125 0.0821 0.113 65.7 90.4 1 10.0-152 31.7 39

Chlorodibromomethane 0.125 0.0961 0.111 76.9 88.8 1 10.0-146 14.4 37

Chloroethane 0.125 0.0234 0.0358 0.000 0.000 1 10.0-146 J3 0.000 40

Chloroform 0.125 0.0640 0.0894 51.2 71.5 1 10.0-146 33.1 37

Chloromethane 0.125 0.0551 0.0778 44.1 62.2 1 10.0-159 34.2 37

2-Chlorotoluene 0.125 0.0749 0.105 59.9 84.0 1 10.0-159 33.5 38

4-Chlorotoluene 0.125 0.0724 0.0991 57.9 79.3 1 10.0-155 31.1 39

1,2-Dibromo-3-Chloropropane 0.125 0.0897 0.0853 71.8 68.2 1 10.0-151 5.03 39

1,2-Dibromoethane 0.125 0.109 0.125 87.2 100 1 10.0-148 13.7 34

Dibromomethane 0.125 0.0922 0.105 73.8 84.0 1 10.0-147 13.0 35

1,2-Dichlorobenzene 0.125 0.0850 0.105 68.0 84.0 1 10.0-155 21.1 37



Dichlorodifluoromethane 0.125 0.0517 0.0890 41.4 71.2 1 10.0-160 J3 53.0 35

1,1-Dichloroethane 0.125 0.0603 0.0906 48.2 72.5 1 10.0-147 J3 40.2 37

1,2-Dichloroethane 0.125 0.0758 0.0922 60.6 73.8 1 10.0-148 19.5 35

1,1-Dichloroethene 0.125 0.0512 0.0878 41.0 70.2 1 10.0-155 J3 52.7 37

cis-1,2-Dichloroethene 0.125 0.0742 0.104 59.4 83.2 1 10.0-149 33.4 37

trans-1,2-Dichloroethene 0.125 0.0573 0.0909 45.8 72.7 1 10.0-150 J3 45.3 37

1,2-Dichloropropane 0.125 0.0806 0.110 64.5 88.0 1 10.0-148 30.8 37

1,1-Dichloropropene 0.125 0.0561 0.0978 44.9 78.2 1 10.0-153 J3 54.2 35

1,2,3-Trimethylbenzene 0.125 0.0747 0.0938 59.8 75.0 1 10.0-160 22.7 36


cis-1,3-Dichloropropene 0.125 0.0776 0.0984 62.1 78.7 1 10.0-151 23.6 37

trans-1,3-Dichloropropene 0.125 0.0852 0.108 68.2 86.4 1 10.0-148 23.6 37


Ethylbenzene 0.125 0.0750 0.103 60.0 82.4 1 10.0-160 31.5 38

Hexachloro-1,3-butadiene 0.125 0.0783 0.105 62.6 84.0 1 10.0-160 29.1 40

Isopropylbenzene 0.125 0.0765 0.108 61.2 86.4 1 10.0-155 34.1 38

p-Isopropyltoluene 0.125 0.0767 0.103 61.4 82.4 1 10.0-160 29.3 40

2-Butanone (MEK) 0.625 0.359 0.504 57.4 80.6 1 10.0-160 33.6 40

Methylene Chloride 0.125 0.0818 0.101 65.4 80.8 1 10.0-141 21.0 37

4-Methyl-2-pentanone (MIBK) 0.625 0.497 0.506 79.5 81.0 1 10.0-160 1.79 35

Methyl tert-butyl ether 0.125 0.0701 0.0850 56.1 68.0 1 11.0-147 19.2 35

Naphthalene 0.125 0.0966 0.0875 77.3 70.0 1 10.0-160 9.89 36

n-Propylbenzene 0.125 0.0677 0.0977 54.2 78.2 1 10.0-158 36.3 38

Styrene 0.125 0.0821 0.111 65.7 88.8 1 10.0-160 29.9 40

1,1,1,2-Tetrachloroethane 0.125 0.0826 0.105 66.1 84.0 1 10.0-149 23.9 39

1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc







(OS) • (MS) R3680029-4 07/15/21 21:27 • (MSD) R3680029-5 07/15/21 21:46



1,1,2,2-Tetrachloroethane 0.125 0.0518 0.0573 41.4 45.8 1 10.0-160 10.1 35

Tetrachloroethene 0.125 0.0756 0.116 60.5 92.8 1 10.0-156 J3 42.2 39

Toluene 0.125 0.0724 0.103 57.9 82.4 1 10.0-156 34.9 38

1,1,2-Trichlorotrifluoroethane 0.125 0.0588 0.0945 47.0 75.6 1 10.0-160 J3 46.6 36

1,2,3-Trichlorobenzene 0.125 0.102 0.103 81.6 82.4 1 10.0-160 0.976 40

1,2,4-Trichlorobenzene 0.125 0.101 0.116 80.8 92.8 1 10.0-160 13.8 40

1,1,1-Trichloroethane 0.125 0.0518 0.0862 41.4 69.0 1 10.0-144 J3 49.9 35

1,1,2-Trichloroethane 0.125 0.104 0.126 83.2 101 1 10.0-160 19.1 35

Trichloroethene 0.125 0.112 0.156 89.6 125 1 10.0-156 32.8 38

Trichlorofluoromethane 0.125 0.0294 0.0475 23.5 38.0 1 10.0-160 J3 47.1 40

1,2,3-Trichloropropane 0.125 0.104 0.106 83.2 84.8 1 10.0-156 1.90 35



Vinyl chloride 0.125 0.0620 0.0939 49.6 75.1 1 10.0-160 J3 40.9 37

Xylenes, Total 0.375 0.224 0.326 59.7 86.9 1 10.0-160 37.1 38

(S) Toluene-d8 108 108 75.0-131



1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc





QUALITY CONTROL SUMMARYWG1705859V o l a t i l e O r g a n i c C o m p o u n d s ( G C / M S ) b y M e t h o d 8 2 6 0 B L 1 3 7 7 6 2 6 - 1 0 , 1 1 , 1 2 , 1 3 , 1 4 , 1 5 , 1 6

Method Blank (MB)

(MB) R3681398-3 07/15/21 10:13



Acetone U 0.0365 0.0500


Benzene U 0.000467 0.00100



Bromoform U 0.00117 0.0250









Chloroform U 0.00103 0.00250





1,2-Dibromoethane U 0.000648 0.00250





















1

Cp

2

Tc

3

Ss

4

Cn

5

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6

Qc

7

Gl

8

Al

9

Sc






Method Blank (MB)

(MB) R3681398-3 07/15/21 10:13




2-Butanone (MEK) U 0.0635 0.100






Styrene U 0.000229 0.0125




Toluene U 0.00130 0.00500













Xylenes, Total U 0.000880 0.00650

(S) Toluene-d8 105 75.0-131




(LCS) R3681398-1 07/15/21 09:15 • (LCSD) R3681398-2 07/15/21 09:35



Acetone 0.625 0.397 0.843 63.5 135 10.0-160 J3 71.9 31

Acrylonitrile 0.625 0.432 0.690 69.1 110 45.0-153 J3 46.0 22

Benzene 0.125 0.117 0.112 93.6 89.6 70.0-123 4.37 20

Bromobenzene 0.125 0.122 0.105 97.6 84.0 73.0-121 15.0 20

Bromodichloromethane 0.125 0.125 0.119 100 95.2 73.0-121 4.92 20

1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc







(LCS) R3681398-1 07/15/21 09:15 • (LCSD) R3681398-2 07/15/21 09:35



Bromoform 0.125 0.0970 0.104 77.6 83.2 64.0-132 6.97 20

Bromomethane 0.125 0.107 0.0958 85.6 76.6 56.0-147 11.0 20

n-Butylbenzene 0.125 0.0992 0.103 79.4 82.4 68.0-135 3.76 20

sec-Butylbenzene 0.125 0.116 0.0990 92.8 79.2 74.0-130 15.8 20

tert-Butylbenzene 0.125 0.127 0.108 102 86.4 75.0-127 16.2 20

Carbon tetrachloride 0.125 0.108 0.0984 86.4 78.7 66.0-128 9.30 20

Chlorobenzene 0.125 0.113 0.108 90.4 86.4 76.0-128 4.52 20

Chlorodibromomethane 0.125 0.107 0.100 85.6 80.0 74.0-127 6.76 20

Chloroethane 0.125 0.109 0.100 87.2 80.0 61.0-134 8.61 20

Chloroform 0.125 0.105 0.104 84.0 83.2 72.0-123 0.957 20

Chloromethane 0.125 0.117 0.102 93.6 81.6 51.0-138 13.7 20

2-Chlorotoluene 0.125 0.125 0.109 100 87.2 75.0-124 13.7 20

4-Chlorotoluene 0.125 0.123 0.108 98.4 86.4 75.0-124 13.0 20

1,2-Dibromo-3-Chloropropane 0.125 0.107 0.121 85.6 96.8 59.0-130 12.3 20

1,2-Dibromoethane 0.125 0.117 0.116 93.6 92.8 74.0-128 0.858 20

Dibromomethane 0.125 0.121 0.121 96.8 96.8 75.0-122 0.000 20




Dichlorodifluoromethane 0.125 0.127 0.110 102 88.0 43.0-156 14.3 20

1,1-Dichloroethane 0.125 0.117 0.108 93.6 86.4 70.0-127 8.00 20

1,2-Dichloroethane 0.125 0.113 0.115 90.4 92.0 65.0-131 1.75 20

1,1-Dichloroethene 0.125 0.101 0.0928 80.8 74.2 65.0-131 8.46 20

cis-1,2-Dichloroethene 0.125 0.111 0.108 88.8 86.4 73.0-125 2.74 20

trans-1,2-Dichloroethene 0.125 0.114 0.107 91.2 85.6 71.0-125 6.33 20




cis-1,3-Dichloropropene 0.125 0.126 0.125 101 100 76.0-127 0.797 20




Ethylbenzene 0.125 0.113 0.110 90.4 88.0 74.0-126 2.69 20

Hexachloro-1,3-butadiene 0.125 0.104 0.118 83.2 94.4 57.0-150 12.6 20

Isopropylbenzene 0.125 0.111 0.113 88.8 90.4 72.0-127 1.79 20

p-Isopropyltoluene 0.125 0.135 0.123 108 98.4 72.0-133 9.30 20

2-Butanone (MEK) 0.625 0.707 0.724 113 116 30.0-160 2.38 24

Methylene Chloride 0.125 0.115 0.112 92.0 89.6 68.0-123 2.64 20

4-Methyl-2-pentanone (MIBK) 0.625 0.603 0.634 96.5 101 56.0-143 5.01 20


1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc







(LCS) R3681398-1 07/15/21 09:15 • (LCSD) R3681398-2 07/15/21 09:35



Naphthalene 0.125 0.107 0.150 85.6 120 59.0-130 J3 33.5 20

n-Propylbenzene 0.125 0.124 0.104 99.2 83.2 74.0-126 17.5 20

Styrene 0.125 0.0965 0.0968 77.2 77.4 72.0-127 0.310 20


1,1,2,2-Tetrachloroethane 0.125 0.132 0.120 106 96.0 68.0-128 9.52 20

Tetrachloroethene 0.125 0.107 0.100 85.6 80.0 70.0-136 6.76 20

Toluene 0.125 0.119 0.109 95.2 87.2 75.0-121 8.77 20


1,2,3-Trichlorobenzene 0.125 0.0956 0.126 76.5 101 59.0-139 J3 27.4 20

1,2,4-Trichlorobenzene 0.125 0.113 0.147 90.4 118 62.0-137 J3 26.2 20



Trichloroethene 0.125 0.110 0.101 88.0 80.8 76.0-126 8.53 20


1,2,3-Trichloropropane 0.125 0.130 0.111 104 88.8 67.0-129 15.8 20

1,2,3-Trimethylbenzene 0.125 0.0927 0.0910 74.2 72.8 74.0-124 J4 1.85 20


1,3,5-Trimethylbenzene 0.125 0.134 0.115 107 92.0 73.0-127 15.3 20

Vinyl chloride 0.125 0.119 0.108 95.2 86.4 63.0-134 9.69 20

Xylenes, Total 0.375 0.333 0.329 88.8 87.7 72.0-127 1.21 20

(S) Toluene-d8 101 100 75.0-131

(S) 4-Bromofluorobenzene 92.3 103 67.0-138

(S) 1,2-Dichloroethane-d4 105 108 70.0-130

L1377654-09 Original Sample (OS) • Matrix Spike (MS) • Matrix Spike Duplicate (MSD)

(OS) L1377654-09 07/15/21 18:18 • (MS) R3681398-4 07/15/21 18:37 • (MSD) R3681398-5 07/15/21 18:56


Analyte mg/kg mg/kg mg/kg mg/kg % % % % %

Acetone 0.317 U 0.112 0.137 51.1 62.6 1 10.0-160 20.1 40

Acrylonitrile 0.317 U 0.192 0.180 87.7 82.2 1 10.0-160 6.45 40

Benzene 0.0635 U 0.0240 0.0188 54.8 42.9 1 10.0-149 24.3 37

Bromobenzene 0.0635 U 0.0294 0.0272 67.1 62.1 1 10.0-156 7.77 38

Bromodichloromethane 0.0635 U 0.0299 0.0255 68.3 58.2 1 10.0-143 15.9 37

Bromoform 0.0635 U 0.0308 0.0301 70.3 68.7 1 10.0-146 2.30 36

Bromomethane 0.0635 U 0.00864 0.00751 19.7 17.1 1 10.0-149 14.0 38

n-Butylbenzene 0.0635 U 0.0241 0.0172 55.0 39.3 1 10.0-160 33.4 40

sec-Butylbenzene 0.0635 U 0.0265 0.0189 60.5 43.2 1 10.0-159 33.5 39

tert-Butylbenzene 0.0635 U 0.0284 0.0214 64.8 48.9 1 10.0-156 28.1 39

1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc







(OS) L1377654-09 07/15/21 18:18 • (MS) R3681398-4 07/15/21 18:37 • (MSD) R3681398-5 07/15/21 18:56



Carbon tetrachloride 0.0635 U 0.0205 0.0145 46.8 33.1 1 10.0-145 34.3 37

Chlorobenzene 0.0635 U 0.0262 0.0211 59.8 48.2 1 10.0-152 21.6 39

Chlorodibromomethane 0.0635 U 0.0285 0.0271 65.1 61.9 1 10.0-146 5.04 37

Chloroethane 0.0635 U 0.00976 0.00766 22.3 17.5 1 10.0-146 24.1 40

Chloroform 0.0635 U 0.0237 0.0189 54.1 43.2 1 10.0-146 22.5 37

Chloromethane 0.0635 U 0.0205 0.0157 46.8 35.8 1 10.0-159 26.5 37

2-Chlorotoluene 0.0635 U 0.0274 0.0216 62.6 49.3 1 10.0-159 23.7 38

4-Chlorotoluene 0.0635 U 0.0271 0.0228 61.9 52.1 1 10.0-155 17.2 39

1,2-Dibromo-3-Chloropropane 0.0635 U 0.0346 0.0383 79.0 87.4 1 10.0-151 10.2 39

1,2-Dibromoethane 0.0635 U 0.0360 0.0344 82.2 78.5 1 10.0-148 4.55 34

Dibromomethane 0.0635 U 0.0349 0.0321 79.7 73.3 1 10.0-147 8.36 35

1,2-Dichlorobenzene 0.0635 U 0.0305 0.0266 69.6 60.7 1 10.0-155 13.7 37



Dichlorodifluoromethane 0.0635 U 0.0252 0.0180 57.5 41.1 1 10.0-160 33.3 35

1,1-Dichloroethane 0.0635 U 0.0247 0.0184 56.4 42.0 1 10.0-147 29.2 37


1,1-Dichloroethene 0.0635 U 0.0200 0.0134 45.7 30.6 1 10.0-155 J3 39.5 37

cis-1,2-Dichloroethene 0.0635 U 0.0244 0.0192 55.7 43.8 1 10.0-149 23.9 37

trans-1,2-Dichloroethene 0.0635 U 0.0226 0.0167 51.6 38.1 1 10.0-150 30.0 37

1,2-Dichloropropane 0.0635 U 0.0295 0.0237 67.4 54.1 1 10.0-148 21.8 37

1,1-Dichloropropene 0.0635 U 0.0214 0.0144 48.9 32.9 1 10.0-153 J3 39.1 35


cis-1,3-Dichloropropene 0.0635 U 0.0310 0.0271 70.8 61.9 1 10.0-151 13.4 37

trans-1,3-Dichloropropene 0.0635 U 0.0305 0.0280 69.6 63.9 1 10.0-148 8.55 37


Di-isopropyl ether 0.0635 U 0.0278 0.0243 63.5 55.5 1 10.0-147 13.4 36

Ethylbenzene 0.0635 U 0.0240 0.0185 54.8 42.2 1 10.0-160 25.9 38

Hexachloro-1,3-butadiene 0.0635 U 0.0292 0.0232 66.7 53.0 1 10.0-160 22.9 40

Isopropylbenzene 0.0635 U 0.0243 0.0179 55.5 40.9 1 10.0-155 30.3 38

p-Isopropyltoluene 0.0635 U 0.0296 0.0222 67.6 50.7 1 10.0-160 28.6 40

2-Butanone (MEK) 0.317 U 0.216 0.252 98.6 115 1 10.0-160 15.4 40

Methylene Chloride 0.0635 U 0.0267 0.0223 61.0 50.9 1 10.0-141 18.0 37

4-Methyl-2-pentanone (MIBK) 0.317 U 0.207 0.225 94.5 103 1 10.0-160 8.33 35

Methyl tert-butyl ether 0.0635 U 0.0295 0.0286 67.4 65.3 1 11.0-147 3.10 35

Naphthalene 0.0635 U 0.0433 0.0451 98.9 103 1 10.0-160 4.07 36

n-Propylbenzene 0.0635 U 0.0260 0.0194 59.4 44.3 1 10.0-158 29.1 38

Styrene 0.0635 U 0.0231 0.0196 52.7 44.7 1 10.0-160 16.4 40

1,1,1,2-Tetrachloroethane 0.0635 U 0.0281 0.0235 64.2 53.7 1 10.0-149 17.8 39


1

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2

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4

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5

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6

Qc

7

Gl

8

Al

9

Sc







(OS) L1377654-09 07/15/21 18:18 • (MS) R3681398-4 07/15/21 18:37 • (MSD) R3681398-5 07/15/21 18:56



Tetrachloroethene 0.0635 U 0.0225 0.0167 51.4 38.1 1 10.0-156 29.6 39

Toluene 0.0635 U 0.0253 0.0199 57.8 45.4 1 10.0-156 23.9 38

1,1,2-Trichlorotrifluoroethane 0.0635 U 0.0219 0.0151 50.0 34.5 1 10.0-160 J3 36.8 36

1,2,3-Trichlorobenzene 0.0635 U 0.0333 0.0314 76.0 71.7 1 10.0-160 5.87 40


1,1,1-Trichloroethane 0.0635 U 0.0162 0.0165 37.0 37.7 1 10.0-144 1.83 35


Trichloroethene 0.0635 0.00436 0.0385 0.0239 77.9 44.6 1 10.0-156 J3 46.8 38

Trichlorofluoromethane 0.0635 U 0.00994 0.00942 22.7 21.5 1 10.0-160 5.37 40

1,2,3-Trichloropropane 0.0635 U 0.0411 0.0410 93.8 93.6 1 10.0-156 0.244 35

1,2,3-Trimethylbenzene 0.0635 U 0.0222 0.0185 50.7 42.2 1 10.0-160 18.2 36



Vinyl chloride 0.0635 U 0.0207 0.0142 47.3 32.4 1 10.0-160 J3 37.2 37

Xylenes, Total 0.190 U 0.0716 0.0567 54.7 43.3 1 10.0-160 23.2 38

(S) Toluene-d8 102 102 75.0-131

(S) 4-Bromofluorobenzene 96.7 96.0 67.0-138


1

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Cn

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6

Qc

7

Gl

8

Al

9

Sc





QUALITY CONTROL SUMMARYWG1707043V o l a t i l e O r g a n i c C o m p o u n d s ( G C / M S ) b y M e t h o d 8 2 6 0 B L 1 3 7 7 6 2 6 - 1 8 , 1 9

Method Blank (MB)

(MB) R3681640-3 07/17/21 02:22



Acetone U 0.0365 0.0500


Benzene U 0.000467 0.00100



Bromoform U 0.00117 0.0250









Chloroform U 0.00103 0.00250





1,2-Dibromoethane U 0.000648 0.00250





















1

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Method Blank (MB)

(MB) R3681640-3 07/17/21 02:22




2-Butanone (MEK) 0.116 0.0635 0.100






Styrene U 0.000229 0.0125




Toluene U 0.00130 0.00500













Xylenes, Total U 0.000880 0.00650

(S) Toluene-d8 99.0 75.0-131




(LCS) R3681640-1 07/17/21 00:58 • (LCSD) R3681640-2 07/17/21 01:19



Acetone 0.625 1.22 0.769 195 123 10.0-160 J4 J3 45.3 31

Acrylonitrile 0.625 0.802 0.603 128 96.5 45.0-153 J3 28.3 22

Benzene 0.125 0.130 0.131 104 105 70.0-123 0.766 20

Bromobenzene 0.125 0.128 0.143 102 114 73.0-121 11.1 20

Bromodichloromethane 0.125 0.135 0.132 108 106 73.0-121 2.25 20

1

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(LCS) R3681640-1 07/17/21 00:58 • (LCSD) R3681640-2 07/17/21 01:19



Bromoform 0.125 0.131 0.124 105 99.2 64.0-132 5.49 20

Bromomethane 0.125 0.0951 0.0942 76.1 75.4 56.0-147 0.951 20

n-Butylbenzene 0.125 0.112 0.112 89.6 89.6 68.0-135 0.000 20


tert-Butylbenzene 0.125 0.114 0.126 91.2 101 75.0-127 10.0 20


Chlorobenzene 0.125 0.118 0.122 94.4 97.6 76.0-128 3.33 20


Chloroethane 0.125 0.104 0.101 83.2 80.8 61.0-134 2.93 20

Chloroform 0.125 0.132 0.132 106 106 72.0-123 0.000 20

Chloromethane 0.125 0.115 0.118 92.0 94.4 51.0-138 2.58 20

2-Chlorotoluene 0.125 0.120 0.128 96.0 102 75.0-124 6.45 20

4-Chlorotoluene 0.125 0.131 0.139 105 111 75.0-124 5.93 20


1,2-Dibromoethane 0.125 0.122 0.126 97.6 101 74.0-128 3.23 20

Dibromomethane 0.125 0.127 0.123 102 98.4 75.0-122 3.20 20





1,1-Dichloroethane 0.125 0.135 0.135 108 108 70.0-127 0.000 20

1,2-Dichloroethane 0.125 0.136 0.134 109 107 65.0-131 1.48 20

1,1-Dichloroethene 0.125 0.137 0.136 110 109 65.0-131 0.733 20




1,1-Dichloropropene 0.125 0.134 0.134 107 107 73.0-125 0.000 20



trans-1,3-Dichloropropene 0.125 0.129 0.140 103 112 73.0-127 8.18 20


Di-isopropyl ether 0.125 0.154 0.149 123 119 60.0-136 3.30 20

Ethylbenzene 0.125 0.121 0.121 96.8 96.8 74.0-126 0.000 20

Hexachloro-1,3-butadiene 0.125 0.126 0.148 101 118 57.0-150 16.1 20


p-Isopropyltoluene 0.125 0.113 0.118 90.4 94.4 72.0-133 4.33 20

2-Butanone (MEK) 0.625 1.08 0.959 173 153 30.0-160 J4 11.9 24


4-Methyl-2-pentanone (MIBK) 0.625 0.782 0.740 125 118 56.0-143 5.52 20

Methyl tert-butyl ether 0.125 0.145 0.133 116 106 66.0-132 8.63 20

1

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2

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4

Cn

5

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Qc

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Gl

8

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9

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(LCS) R3681640-1 07/17/21 00:58 • (LCSD) R3681640-2 07/17/21 01:19



Naphthalene 0.125 0.112 0.112 89.6 89.6 59.0-130 0.000 20

n-Propylbenzene 0.125 0.107 0.119 85.6 95.2 74.0-126 10.6 20

Styrene 0.125 0.126 0.121 101 96.8 72.0-127 4.05 20


1,1,2,2-Tetrachloroethane 0.125 0.122 0.131 97.6 105 68.0-128 7.11 20


Toluene 0.125 0.114 0.120 91.2 96.0 75.0-121 5.13 20


1,2,3-Trichlorobenzene 0.125 0.113 0.126 90.4 101 59.0-139 10.9 20

1,2,4-Trichlorobenzene 0.125 0.119 0.132 95.2 106 62.0-137 10.4 20





1,2,3-Trichloropropane 0.125 0.138 0.145 110 116 67.0-129 4.95 20


1,2,4-Trimethylbenzene 0.125 0.121 0.125 96.8 100 70.0-126 3.25 20


Vinyl chloride 0.125 0.110 0.109 88.0 87.2 63.0-134 0.913 20

Xylenes, Total 0.375 0.370 0.356 98.7 94.9 72.0-127 3.86 20

(S) Toluene-d8 86.6 92.1 75.0-131




(OS) L1377626-18 07/17/21 12:13 • (MS) R3681640-4 07/17/21 14:36 • (MSD) R3681640-5 07/17/21 14:57



Acetone 0.625 U 0.457 0.454 73.1 72.6 1 10.0-160 0.659 40

Acrylonitrile 0.625 U 0.643 0.495 103 79.2 1 10.0-160 26.0 40

Benzene 0.125 U 0.0723 0.114 57.8 91.2 1 10.0-149 J3 44.8 37

Bromobenzene 0.125 U 0.0983 0.125 78.6 100 1 10.0-156 23.9 38


Bromoform 0.125 U 0.111 0.102 88.8 81.6 1 10.0-146 8.45 36

Bromomethane 0.125 U 0.0331 0.0554 26.5 44.3 1 10.0-149 J3 50.4 38

n-Butylbenzene 0.125 U 0.0556 0.106 44.5 84.8 1 10.0-160 J3 62.4 40

sec-Butylbenzene 0.125 U 0.0527 0.104 42.2 83.2 1 10.0-159 J3 65.5 39

tert-Butylbenzene 0.125 U 0.0607 0.115 48.6 92.0 1 10.0-156 J3 61.8 39

1

Cp

2

Tc

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Ss

4

Cn

5

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6

Qc

7

Gl

8

Al

9

Sc







(OS) L1377626-18 07/17/21 12:13 • (MS) R3681640-4 07/17/21 14:36 • (MSD) R3681640-5 07/17/21 14:57



Carbon tetrachloride 0.125 U 0.0494 0.0998 39.5 79.8 1 10.0-145 J3 67.6 37

Chlorobenzene 0.125 U 0.0766 0.101 61.3 80.8 1 10.0-152 27.5 39


Chloroethane 0.125 U 0.0202 0.0402 16.2 32.2 1 10.0-146 J3 66.2 40

Chloroform 0.125 U 0.0785 0.109 62.8 87.2 1 10.0-146 32.5 37

Chloromethane 0.125 U 0.0559 0.104 44.7 83.2 1 10.0-159 J3 60.2 37

2-Chlorotoluene 0.125 U 0.0711 0.113 56.9 90.4 1 10.0-159 J3 45.5 38

4-Chlorotoluene 0.125 U 0.0852 0.123 68.2 98.4 1 10.0-155 36.3 39


1,2-Dibromoethane 0.125 U 0.112 0.110 89.6 88.0 1 10.0-148 1.80 34





Dichlorodifluoromethane 0.125 U 0.0466 0.104 37.3 83.2 1 10.0-160 J3 76.2 35

1,1-Dichloroethane 0.125 U 0.0750 0.115 60.0 92.0 1 10.0-147 J3 42.1 37


1,1-Dichloroethene 0.125 U 0.0580 0.120 46.4 96.0 1 10.0-155 J3 69.7 37


trans-1,2-Dichloroethene 0.125 U 0.0614 0.103 49.1 82.4 1 10.0-150 J3 50.6 37



1,3-Dichloropropane 0.125 U 0.126 0.124 101 99.2 1 10.0-154 1.60 35

cis-1,3-Dichloropropene 0.125 U 0.105 0.126 84.0 101 1 10.0-151 18.2 37

trans-1,3-Dichloropropene 0.125 U 0.118 0.126 94.4 101 1 10.0-148 6.56 37

2,2-Dichloropropane 0.125 U 0.0527 0.0994 42.2 79.5 1 10.0-138 J3 61.4 36

Di-isopropyl ether 0.125 U 0.115 0.134 92.0 107 1 10.0-147 15.3 36

Ethylbenzene 0.125 U 0.0634 0.0982 50.7 78.6 1 10.0-160 J3 43.1 38

Hexachloro-1,3-butadiene 0.125 U 0.0805 0.126 64.4 101 1 10.0-160 J3 44.1 40

Isopropylbenzene 0.125 U 0.0580 0.0960 46.4 76.8 1 10.0-155 J3 49.4 38

p-Isopropyltoluene 0.125 U 0.0578 0.106 46.2 84.8 1 10.0-160 J3 58.9 40

2-Butanone (MEK) 0.625 U 0.697 0.712 112 114 1 10.0-160 2.13 40


4-Methyl-2-pentanone (MIBK) 0.625 U 0.742 0.605 119 96.8 1 10.0-160 20.3 35


Naphthalene 0.125 U 0.101 0.106 80.8 84.8 1 10.0-160 4.83 36

n-Propylbenzene 0.125 U 0.0585 0.105 46.8 84.0 1 10.0-158 J3 56.9 38

Styrene 0.125 U 0.0803 0.101 64.2 80.8 1 10.0-160 22.8 40


1,1,2,2-Tetrachloroethane 0.125 U 0.125 0.119 100 95.2 1 10.0-160 4.92 35

1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

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(OS) L1377626-18 07/17/21 12:13 • (MS) R3681640-4 07/17/21 14:36 • (MSD) R3681640-5 07/17/21 14:57



Tetrachloroethene 0.125 U 0.0603 0.105 48.2 84.0 1 10.0-156 J3 54.1 39

Toluene 0.125 U 0.0684 0.104 54.7 83.2 1 10.0-156 J3 41.3 38

1,1,2-Trichlorotrifluoroethane 0.125 U 0.0454 0.102 36.3 81.6 1 10.0-160 J3 76.8 36

1,2,3-Trichlorobenzene 0.125 U 0.0903 0.127 72.2 102 1 10.0-160 33.8 40

1,2,4-Trichlorobenzene 0.125 U 0.104 0.132 83.2 106 1 10.0-160 23.7 40

1,1,1-Trichloroethane 0.125 U 0.0626 0.119 50.1 95.2 1 10.0-144 J3 62.1 35


Trichloroethene 0.125 U 0.0650 0.108 52.0 86.4 1 10.0-156 J3 49.7 38

Trichlorofluoromethane 0.125 U 0.0273 0.0633 21.8 50.6 1 10.0-160 J3 79.5 40

1,2,3-Trichloropropane 0.125 U 0.136 0.131 109 105 1 10.0-156 3.75 35


1,2,4-Trimethylbenzene 0.125 U 0.0691 0.109 55.3 87.2 1 10.0-160 J3 44.8 36


Vinyl chloride 0.125 U 0.0487 0.103 39.0 82.4 1 10.0-160 J3 71.6 37

Xylenes, Total 0.375 U 0.206 0.295 54.9 78.7 1 10.0-160 35.5 38

(S) Toluene-d8 94.7 93.8 75.0-131



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GLOSSARY OF TERMS

Guide to Reading and Understanding Your Laboratory Report

The information below is designed to better explain the various terms used in your report of analytical results from the Laboratory. This is not intended as a comprehensive explanation, and if you have additional questions please contact your project representative.

Results Disclaimer - Information that may be provided by the customer, and contained within this report, include Permit Limits, Project Name, Sample ID, Sample Matrix, Sample Preservation, Field Blanks, Field Spikes, Field Duplicates, On-Site Data, Sampling Collection Dates/Times, and Sampling Location. Results relate to the accuracy of this information provided, and as the samples are received.

Abbreviations and Definitions

MDL Method Detection Limit.

RDL Reported Detection Limit.

Rec. Recovery.

RPD Relative Percent Difference.

SDG Sample Delivery Group.

(S)Surrogate (Surrogate Standard) - Analytes added to every blank, sample, Laboratory Control Sample/Duplicate and Matrix Spike/Duplicate; used to evaluate analytical efficiency by measuring recovery. Surrogates are not expected to be detected in all environmental media.

U Not detected at the Reporting Limit (or MDL where applicable).

Analyte The name of the particular compound or analysis performed. Some Analyses and Methods will have multiple analytes reported.

Dilution

If the sample matrix contains an interfering material, the sample preparation volume or weight values differ from the standard, or if concentrations of analytes in the sample are higher than the highest limit of concentration that the laboratory can accurately report, the sample may be diluted for analysis. If a value different than 1 is used in this field, the result reported has already been corrected for this factor.

LimitsThese are the target % recovery ranges or % difference value that the laboratory has historically determined as normal for the method and analyte being reported. Successful QC Sample analysis will target all analytes recovered or duplicated within these ranges.

Original Sample The non-spiked sample in the prep batch used to determine the Relative Percent Difference (RPD) from a quality control sample. The Original Sample may not be included within the reported SDG.

QualifierThis column provides a letter and/or number designation that corresponds to additional information concerning the resultreported. If a Qualifier is present, a definition per Qualifier is provided within the Glossary and Definitions page and potentially a discussion of possible implications of the Qualifier in the Case Narrative if applicable.

Result

The actual analytical final result (corrected for any sample specific characteristics) reported for your sample. If there was no measurable result returned for a specific analyte, the result in this column may state “ND” (Not Detected) or “BDL” (Below Detectable Levels). The information in the results column should always be accompanied by either an MDL (Method Detection Limit) or RDL (Reporting Detection Limit) that defines the lowest value that the laboratory could detect or report for this analyte.

Uncertainty (Radiochemistry) Confidence level of 2 sigma.

Case Narrative (Cn)A brief discussion about the included sample results, including a discussion of any non-conformances to protocol observed either at sample receipt by the laboratory from the field or during the analytical process. If present, there will be a section in the Case Narrative to discuss the meaning of any data qualifiers used in the report.

Quality Control Summary (Qc)

This section of the report includes the results of the laboratory quality control analyses required by procedure or analytical methods to assist in evaluating the validity of the results reported for your samples. These analyses are not being performed on your samples typically, but on laboratory generated material.

Sample Chain of Custody (Sc)

This is the document created in the field when your samples were initially collected. This is used to verify the time and date of collection, the person collecting the samples, and the analyses that the laboratory is requested to perform. This chain of custody also documents all persons (excluding commercial shippers) that have had control or possession of the samples from the time of collection until delivery to the laboratory for analysis.

Sample Results (Sr)This section of your report will provide the results of all testing performed on your samples. These results are provided by sample ID and are separated by the analyses performed on each sample. The header line of each analysis section foreach sample will provide the name and method number for the analysis reported.

Sample Summary (Ss) This section of the Analytical Report defines the specific analyses performed for each sample ID, including the dates andtimes of preparation and/or analysis.

Qualifier Description

J The identification of the analyte is acceptable; the reported value is an estimate.

J3 The associated batch QC was outside the established quality control range for precision.

J4 The associated batch QC was outside the established quality control range for accuracy.

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Pace Analytical National 12065 Lebanon Rd Mount Juliet, TN 37122Alabama 40660 Nebraska NE-OS-15-05

Alaska 17-026 Nevada TN000032021-1

Arizona AZ0612 New Hampshire 2975

Arkansas 88-0469 New Jersey–NELAP TN002

California 2932 New Mexico ¹ TN00003

Colorado TN00003 New York 11742

Connecticut PH-0197 North Carolina Env375

Florida E87487 North Carolina ¹ DW21704

Georgia NELAP North Carolina ³ 41

Georgia ¹ 923 North Dakota R-140

Idaho TN00003 Ohio–VAP CL0069

Illinois 200008 Oklahoma 9915

Indiana C-TN-01 Oregon TN200002

Iowa 364 Pennsylvania 68-02979

Kansas E-10277 Rhode Island LAO00356

Kentucky ¹ ⁶ KY90010 South Carolina 84004002

Kentucky ² 16 South Dakota n/a

Louisiana AI30792 Tennessee ¹ ⁴ 2006

Louisiana LA018 Texas T104704245-20-18

Maine TN00003 Texas ⁵ LAB0152

Maryland 324 Utah TN000032021-11

Massachusetts M-TN003 Vermont VT2006

Michigan 9958 Virginia 110033

Minnesota 047-999-395 Washington C847

Mississippi TN00003 West Virginia 233

Missouri 340 Wisconsin 998093910

Montana CERT0086 Wyoming A2LA

A2LA – ISO 17025 1461.01 AIHA-LAP,LLC EMLAP 100789

A2LA – ISO 17025 ⁵ 1461.02 DOD 1461.01

Canada 1461.01 USDA P330-15-00234

EPA–Crypto TN00003

ACCREDITATIONS & LOCATIONS

¹ Drinking Water ² Underground Storage Tanks ³ Aquatic Toxicity ⁴ Chemical/Microbiological ⁵ Mold ⁶ Wastewater n/a Accreditation not applicable

* Not all certifications held by the laboratory are applicable to the results reported in the attached report.

* Accreditation is only applicable to the test methods specified on each scope of accreditation held by Pace Analytical.

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https://www.pacenational.com/technical/accreditations

ANALYTICAL REPORTJuly 20, 2021

ERO Resources




Description: Thronton SC



Denver, CO 80218


July 20, 2021





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July 20, 2021









TABLE OF CONTENTS

Cp: Cover Page 1





MW-C L1379534-01 5

MW-B L1379534-02 7






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SAMPLE SUMMARY


MW-C L1379534-01 Solid Josh Rosen 07/09/21 09:20 07/13/21 09:15


date/time date/time



MW-B L1379534-02 Solid Josh Rosen 07/09/21 11:45 07/13/21 09:15


date/time date/time


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CASE NARRATIVE




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MW-CC o l l e c t e d d a t e / t i m e : 0 7 / 0 9 / 2 1 0 9 : 2 0




Acetone U 0.0365 0.0500 1 07/18/2021 02:32 WG1707100


Benzene U 0.000467 0.00100 1 07/18/2021 02:32 WG1707100



Bromoform U 0.00117 0.0250 1 07/18/2021 02:32 WG1707100









Chloroform U 0.00103 0.00250 1 07/18/2021 02:32 WG1707100



























2-Butanone (MEK) U 0.0635 0.100 1 07/18/2021 02:32 WG1707100




Naphthalene U 0.00488 0.0125 1 07/18/2021 02:32 WG1707100


Styrene U 0.000229 0.0125 1 07/18/2021 02:32 WG1707100





Toluene U 0.00130 0.00500 1 07/18/2021 02:32 WG1707100




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MW-CC o l l e c t e d d a t e / t i m e : 0 7 / 0 9 / 2 1 0 9 : 2 0












Xylenes, Total 0.00110 J 0.000880 0.00650 1 07/18/2021 02:32 WG1707100

(S) Toluene-d8 109 75.0-131 07/18/2021 02:32 WG1707100



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MW-BC o l l e c t e d d a t e / t i m e : 0 7 / 0 9 / 2 1 1 1 : 4 5




Acetone U 0.0365 0.0500 1 07/18/2021 02:51 WG1707100


Benzene U 0.000467 0.00100 1 07/18/2021 02:51 WG1707100



Bromoform U 0.00117 0.0250 1 07/18/2021 02:51 WG1707100









Chloroform U 0.00103 0.00250 1 07/18/2021 02:51 WG1707100



























2-Butanone (MEK) U 0.0635 0.100 1 07/18/2021 02:51 WG1707100




Naphthalene U 0.00488 0.0125 1 07/18/2021 02:51 WG1707100


Styrene U 0.000229 0.0125 1 07/18/2021 02:51 WG1707100





Toluene U 0.00130 0.00500 1 07/18/2021 02:51 WG1707100




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MW-BC o l l e c t e d d a t e / t i m e : 0 7 / 0 9 / 2 1 1 1 : 4 5













(S) Toluene-d8 109 75.0-131 07/18/2021 02:51 WG1707100



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Method Blank (MB)

(MB) R3681552-3 07/18/21 01:35



Acetone U 0.0365 0.0500


Benzene U 0.000467 0.00100



Bromoform U 0.00117 0.0250









Chloroform U 0.00103 0.00250





1,2-Dibromoethane U 0.000648 0.00250





















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Method Blank (MB)

(MB) R3681552-3 07/18/21 01:35




2-Butanone (MEK) U 0.0635 0.100






Styrene U 0.000229 0.0125




Toluene U 0.00130 0.00500













Xylenes, Total U 0.000880 0.00650

(S) Toluene-d8 109 75.0-131




(LCS) R3681552-1 07/18/21 00:19 • (LCSD) R3681552-2 07/18/21 00:38



Acetone 0.625 0.622 0.578 99.5 92.5 10.0-160 7.33 31

Acrylonitrile 0.625 0.633 0.599 101 95.8 45.0-153 5.52 22

Benzene 0.125 0.138 0.137 110 110 70.0-123 0.727 20

Bromobenzene 0.125 0.138 0.142 110 114 73.0-121 2.86 20

Bromodichloromethane 0.125 0.114 0.114 91.2 91.2 73.0-121 0.000 20

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(LCS) R3681552-1 07/18/21 00:19 • (LCSD) R3681552-2 07/18/21 00:38



Bromoform 0.125 0.126 0.121 101 96.8 64.0-132 4.05 20

Bromomethane 0.125 0.117 0.115 93.6 92.0 56.0-147 1.72 20

n-Butylbenzene 0.125 0.121 0.124 96.8 99.2 68.0-135 2.45 20

sec-Butylbenzene 0.125 0.126 0.129 101 103 74.0-130 2.35 20

tert-Butylbenzene 0.125 0.128 0.127 102 102 75.0-127 0.784 20


Chlorobenzene 0.125 0.144 0.142 115 114 76.0-128 1.40 20

Chlorodibromomethane 0.125 0.125 0.117 100 93.6 74.0-127 6.61 20

Chloroethane 0.125 0.122 0.115 97.6 92.0 61.0-134 5.91 20

Chloroform 0.125 0.125 0.118 100 94.4 72.0-123 5.76 20

Chloromethane 0.125 0.120 0.119 96.0 95.2 51.0-138 0.837 20

2-Chlorotoluene 0.125 0.141 0.135 113 108 75.0-124 4.35 20

4-Chlorotoluene 0.125 0.135 0.138 108 110 75.0-124 2.20 20

1,2-Dibromo-3-Chloropropane 0.125 0.126 0.129 101 103 59.0-130 2.35 20

1,2-Dibromoethane 0.125 0.143 0.141 114 113 74.0-128 1.41 20

Dibromomethane 0.125 0.120 0.114 96.0 91.2 75.0-122 5.13 20





1,1-Dichloroethane 0.125 0.119 0.116 95.2 92.8 70.0-127 2.55 20

1,2-Dichloroethane 0.125 0.111 0.110 88.8 88.0 65.0-131 0.905 20

1,1-Dichloroethene 0.125 0.109 0.112 87.2 89.6 65.0-131 2.71 20







trans-1,3-Dichloropropene 0.125 0.129 0.128 103 102 73.0-127 0.778 20


Di-isopropyl ether 0.125 0.132 0.130 106 104 60.0-136 1.53 20

Ethylbenzene 0.125 0.145 0.145 116 116 74.0-126 0.000 20

Hexachloro-1,3-butadiene 0.125 0.131 0.131 105 105 57.0-150 0.000 20



2-Butanone (MEK) 0.625 0.662 0.629 106 101 30.0-160 5.11 24



Methyl tert-butyl ether 0.125 0.128 0.121 102 96.8 66.0-132 5.62 20

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(LCS) R3681552-1 07/18/21 00:19 • (LCSD) R3681552-2 07/18/21 00:38



Naphthalene 0.125 0.155 0.157 124 126 59.0-130 1.28 20

n-Propylbenzene 0.125 0.135 0.134 108 107 74.0-126 0.743 20

Styrene 0.125 0.134 0.132 107 106 72.0-127 1.50 20




Toluene 0.125 0.144 0.140 115 112 75.0-121 2.82 20








1,2,3-Trichloropropane 0.125 0.126 0.130 101 104 67.0-129 3.12 20



1,3,5-Trimethylbenzene 0.125 0.130 0.130 104 104 73.0-127 0.000 20

Vinyl chloride 0.125 0.116 0.116 92.8 92.8 63.0-134 0.000 20

Xylenes, Total 0.375 0.436 0.427 116 114 72.0-127 2.09 20

(S) Toluene-d8 106 104 75.0-131

(S) 4-Bromofluorobenzene 100 97.3 67.0-138



(OS) L1379249-03 07/18/21 07:55 • (MS) R3681552-4 07/18/21 08:14 • (MSD) R3681552-5 07/18/21 08:33



Acetone 10.8 U 9.23 7.16 85.5 66.3 20 10.0-160 25.3 40

Acrylonitrile 10.8 U 10.4 8.30 96.3 76.9 20 10.0-160 22.5 40

Benzene 2.15 U 0.949 1.71 44.1 79.5 20 10.0-149 J3 57.2 37

Bromobenzene 2.15 U 1.46 1.83 67.9 85.1 20 10.0-156 22.5 38


Bromoform 2.15 U 1.72 1.53 80.0 71.2 20 10.0-146 11.7 36

Bromomethane 2.15 U 0.594 1.19 27.6 55.3 20 10.0-149 J3 66.8 38

n-Butylbenzene 2.15 U 0.699 1.60 32.5 74.4 20 10.0-160 J3 78.4 40

sec-Butylbenzene 2.15 U 0.651 1.70 30.3 79.1 20 10.0-159 J3 89.2 39

tert-Butylbenzene 2.15 U 0.725 1.72 33.7 80.0 20 10.0-156 J3 81.4 39

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(OS) L1379249-03 07/18/21 07:55 • (MS) R3681552-4 07/18/21 08:14 • (MSD) R3681552-5 07/18/21 08:33



Carbon tetrachloride 2.15 U 0.442 1.44 20.6 67.0 20 10.0-145 J3 106 37

Chlorobenzene 2.15 U 1.19 1.76 55.3 81.9 20 10.0-152 38.6 39


Chloroethane 2.15 U 0.589 1.38 27.4 64.2 20 10.0-146 J3 80.3 40

Chloroform 2.15 U 0.965 1.54 44.9 71.6 20 10.0-146 J3 45.9 37

Chloromethane 2.15 U 0.619 1.50 28.8 69.8 20 10.0-159 J3 83.2 37



1,2-Dibromo-3-Chloropropane 2.15 U 2.19 1.79 102 83.3 20 10.0-151 20.1 39

1,2-Dibromoethane 2.15 U 1.90 1.84 88.4 85.6 20 10.0-148 3.21 34





Dichlorodifluoromethane 2.15 U 0.219 1.29 10.2 60.0 20 10.0-160 J3 142 35

1,1-Dichloroethane 2.15 U 0.793 1.47 36.9 68.4 20 10.0-147 J3 59.8 37


1,1-Dichloroethene 2.15 U 0.389 1.32 18.1 61.4 20 10.0-155 J3 109 37

cis-1,2-Dichloroethene 2.15 U 0.978 1.55 45.5 72.1 20 10.0-149 J3 45.3 37

trans-1,2-Dichloroethene 2.15 U 0.669 1.47 31.1 68.4 20 10.0-150 J3 74.9 37








Ethylbenzene 2.15 U 0.903 1.71 42.0 79.5 20 10.0-160 J3 61.8 38

Hexachloro-1,3-butadiene 2.15 U 1.01 2.37 47.0 110 20 10.0-160 J3 80.5 40

Isopropylbenzene 2.15 U 0.740 1.66 34.4 77.2 20 10.0-155 J3 76.7 38

p-Isopropyltoluene 2.15 U 0.729 1.70 33.9 79.1 20 10.0-160 J3 80.0 40

2-Butanone (MEK) 10.8 U 11.0 8.71 102 80.6 20 10.0-160 23.2 40

Methylene Chloride 2.15 U 0.969 1.41 45.1 65.6 20 10.0-141 J3 37.1 37

4-Methyl-2-pentanone (MIBK) 10.8 U 10.4 8.32 96.3 77.0 20 10.0-160 22.2 35


Naphthalene 2.15 U 2.68 2.56 125 119 20 10.0-160 4.58 36

n-Propylbenzene 2.15 U 0.748 1.73 34.8 80.5 20 10.0-158 J3 79.3 38

Styrene 2.15 U 1.16 1.67 54.0 77.7 20 10.0-160 36.0 40



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(OS) L1379249-03 07/18/21 07:55 • (MS) R3681552-4 07/18/21 08:14 • (MSD) R3681552-5 07/18/21 08:33



Tetrachloroethene 2.15 U 0.674 1.79 31.3 83.3 20 10.0-156 J3 90.6 39

Toluene 2.15 U 0.962 1.78 44.7 82.8 20 10.0-156 J3 59.7 38

1,1,2-Trichlorotrifluoroethane 2.15 U 0.245 1.31 11.4 60.9 20 10.0-160 J3 137 36

1,2,3-Trichlorobenzene 2.15 U 2.47 2.18 115 101 20 10.0-160 12.5 40


1,1,1-Trichloroethane 2.15 U 0.522 1.44 24.3 67.0 20 10.0-144 J3 93.6 35


Trichloroethene 2.15 U 0.878 1.63 40.8 75.8 20 10.0-156 J3 60.0 38

Trichlorofluoromethane 2.15 U 0.263 1.00 12.2 46.5 20 10.0-160 J3 117 40

1,2,3-Trichloropropane 2.15 U 1.91 1.58 88.8 73.5 20 10.0-156 18.9 35




Vinyl chloride 2.15 U 0.422 1.40 19.6 65.1 20 10.0-160 J3 107 37

Xylenes, Total 6.45 U 2.95 5.41 45.7 83.9 20 10.0-160 J3 58.9 38

(S) Toluene-d8 106 107 75.0-131



Sample Narrative:

OS: Non-target compounds too high to run at a lower dilution.

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GLOSSARY OF TERMS







Rec. Recovery.






Dilution





Result













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A2LA – ISO 17025 ⁵ 1461.02 DOD 1461.01

Canada 1461.01 USDA P330-15-00234






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ANALYTICAL REPORTJuly 28, 2021

ERO Resources




Description: TSC



Denver, CO 80218


July 28, 2021





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July 29, 2021









TABLE OF CONTENTS

Cp: Cover Page 1





TVP-A L1382596-01 5

TVP-B L1382596-02 7

TVP-C L1382596-03 9

TVP-D L1382596-04 11

TVP-E L1382596-05 13

TVP-F L1382596-06 15


Volatile Organic Compounds (MS) by Method TO-15 17




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SAMPLE SUMMARY


TVP-A L1382596-01 Air Adam B. 07/23/21 12:54 07/24/21 09:00


date/time date/time

Volatile Organic Compounds (MS) by Method TO-15 WG1711789 1 07/26/21 12:38 07/26/21 12:38 CEP Mt. Juliet, TN


TVP-B L1382596-02 Air Adam B. 07/23/21 10:01 07/24/21 09:00


date/time date/time



TVP-C L1382596-03 Air Adam B. 07/23/21 10:42 07/24/21 09:00


date/time date/time


Volatile Organic Compounds (MS) by Method TO-15 WG1712336 10 07/27/21 14:01 07/27/21 14:01 DAH Mt. Juliet, TN


TVP-D L1382596-04 Air Adam B. 07/23/21 11:16 07/24/21 09:00


date/time date/time


Volatile Organic Compounds (MS) by Method TO-15 WG1712336 10 07/27/21 14:41 07/27/21 14:41 DAH Mt. Juliet, TN


TVP-E L1382596-05 Air Adam B. 07/23/21 12:06 07/24/21 09:00


date/time date/time



TVP-F L1382596-06 Air Adam B. 07/23/21 13:51 07/24/21 09:00


date/time date/time


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CASE NARRATIVE




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TVP-AC o l l e c t e d d a t e / t i m e : 0 7 / 2 3 / 2 1 1 2 : 5 4

Volatile Organic Compounds (MS) by Method TO-15

CAS # Mol. Wt. RDL1 RDL2 Result Result Qualifier Dilution Batch

Analyte ppbv ug/m3 ppbv ug/m3

Acetone 67-64-1 58.10 1.25 2.97 10.7 25.4 1 WG1711789

Allyl chloride 107-05-1 76.53 0.200 0.626 ND ND 1 WG1711789

Benzene 71-43-2 78.10 0.200 0.639 1.30 4.15 1 WG1711789

Benzyl Chloride 100-44-7 127 0.200 1.04 ND ND 1 WG1711789

Bromodichloromethane 75-27-4 164 0.200 1.34 ND ND 1 WG1711789

Bromoform 75-25-2 253 0.600 6.21 ND ND 1 WG1711789

Bromomethane 74-83-9 94.90 0.200 0.776 ND ND 1 WG1711789

1,3-Butadiene 106-99-0 54.10 2.00 4.43 ND ND 1 WG1711789

Carbon disulfide 75-15-0 76.10 0.200 0.622 1.54 4.79 1 WG1711789

Carbon tetrachloride 56-23-5 154 0.200 1.26 ND ND 1 WG1711789

Chlorobenzene 108-90-7 113 0.200 0.924 ND ND 1 WG1711789

Chloroethane 75-00-3 64.50 0.200 0.528 ND ND 1 WG1711789

Chloroform 67-66-3 119 0.200 0.973 2.72 13.2 1 WG1711789

Chloromethane 74-87-3 50.50 0.200 0.413 0.637 1.32 1 WG1711789

2-Chlorotoluene 95-49-8 126 0.200 1.03 ND ND 1 WG1711789

Cyclohexane 110-82-7 84.20 0.200 0.689 1.76 6.06 1 WG1711789

Dibromochloromethane 124-48-1 208 0.200 1.70 ND ND 1 WG1711789

1,2-Dibromoethane 106-93-4 188 0.200 1.54 ND ND 1 WG1711789

1,2-Dichlorobenzene 95-50-1 147 0.200 1.20 ND ND 1 WG1711789

1,3-Dichlorobenzene 541-73-1 147 0.200 1.20 0.580 3.49 1 WG1711789


1,2-Dichloroethane 107-06-2 99 0.200 0.810 ND ND 1 WG1711789


1,1-Dichloroethene 75-35-4 96.90 0.200 0.793 ND ND 1 WG1711789

cis-1,2-Dichloroethene 156-59-2 96.90 0.200 0.793 ND ND 1 WG1711789

trans-1,2-Dichloroethene 156-60-5 96.90 0.200 0.793 ND ND 1 WG1711789

1,2-Dichloropropane 78-87-5 113 0.200 0.924 ND ND 1 WG1711789

cis-1,3-Dichloropropene 10061-01-5 111 0.200 0.908 ND ND 1 WG1711789

trans-1,3-Dichloropropene 10061-02-6 111 0.200 0.908 ND ND 1 WG1711789

1,4-Dioxane 123-91-1 88.10 0.200 0.721 ND ND 1 WG1711789

Ethanol 64-17-5 46.10 1.25 2.36 33.8 63.7 1 WG1711789

Ethylbenzene 100-41-4 106 0.200 0.867 0.393 1.70 1 WG1711789

4-Ethyltoluene 622-96-8 120 0.200 0.982 ND ND 1 WG1711789

Trichlorofluoromethane 75-69-4 137.40 0.200 1.12 0.216 1.21 1 WG1711789

Dichlorodifluoromethane 75-71-8 120.92 0.200 0.989 0.424 2.10 1 WG1711789

1,1,2-Trichlorotrifluoroethane 76-13-1 187.40 0.200 1.53 ND ND 1 WG1711789

1,2-Dichlorotetrafluoroethane 76-14-2 171 0.200 1.40 ND ND 1 WG1711789

Heptane 142-82-5 100 0.200 0.818 1.02 4.17 1 WG1711789

Hexachloro-1,3-butadiene 87-68-3 261 0.630 6.73 ND ND 1 WG1711789

n-Hexane 110-54-3 86.20 0.630 2.22 16.5 58.2 1 WG1711789

Isopropylbenzene 98-82-8 120.20 0.200 0.983 ND ND 1 WG1711789

Methylene Chloride 75-09-2 84.90 0.200 0.694 1.87 6.49 1 WG1711789

Methyl Butyl Ketone 591-78-6 100 1.25 5.11 ND ND 1 WG1711789

2-Butanone (MEK) 78-93-3 72.10 1.25 3.69 ND ND 1 WG1711789

4-Methyl-2-pentanone (MIBK) 108-10-1 100.10 1.25 5.12 ND ND 1 WG1711789

Methyl methacrylate 80-62-6 100.12 0.200 0.819 ND ND 1 WG1711789

MTBE 1634-04-4 88.10 0.200 0.721 ND ND 1 WG1711789

Naphthalene 91-20-3 128 0.630 3.30 ND ND 1 WG1711789

2-Propanol 67-63-0 60.10 1.25 3.07 2.69 6.61 1 WG1711789

Propene 115-07-1 42.10 1.25 2.15 13.7 23.6 1 WG1711789

Styrene 100-42-5 104 0.200 0.851 ND ND 1 WG1711789

1,1,2,2-Tetrachloroethane 79-34-5 168 0.200 1.37 ND ND 1 WG1711789

Tetrachloroethylene 127-18-4 166 0.200 1.36 ND ND 1 WG1711789

Tetrahydrofuran 109-99-9 72.10 0.200 0.590 ND ND 1 WG1711789

Toluene 108-88-3 92.10 0.500 1.88 4.08 15.4 1 WG1711789

1,2,4-Trichlorobenzene 120-82-1 181 0.630 4.66 ND ND 1 WG1711789

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TVP-AC o l l e c t e d d a t e / t i m e : 0 7 / 2 3 / 2 1 1 2 : 5 4




1,1,1-Trichloroethane 71-55-6 133 0.200 1.09 ND ND 1 WG1711789


Trichloroethylene 79-01-6 131 0.200 1.07 ND ND 1 WG1711789

1,2,4-Trimethylbenzene 95-63-6 120 0.200 0.982 0.243 1.19 1 WG1711789

1,3,5-Trimethylbenzene 108-67-8 120 0.200 0.982 ND ND 1 WG1711789

2,2,4-Trimethylpentane 540-84-1 114.22 0.200 0.934 3.46 16.2 1 WG1711789

Vinyl chloride 75-01-4 62.50 0.200 0.511 ND ND 1 WG1711789

Vinyl Bromide 593-60-2 106.95 0.200 0.875 ND ND 1 WG1711789

Vinyl acetate 108-05-4 86.10 0.200 0.704 ND ND 1 WG1711789

m&p-Xylene 1330-20-7 106 0.400 1.73 0.795 3.45 1 WG1711789

o-Xylene 95-47-6 106 0.200 0.867 0.309 1.34 1 WG1711789

(S) 1,4-Bromofluorobenzene 460-00-4 175 60.0-140 92.0 WG1711789

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TVP-BC o l l e c t e d d a t e / t i m e : 0 7 / 2 3 / 2 1 1 0 : 0 1




Acetone 67-64-1 58.10 1.25 2.97 22.8 54.2 1 WG1711789


Benzene 71-43-2 78.10 0.200 0.639 1.21 3.87 1 WG1711789










Chloroform 67-66-3 119 0.200 0.973 3.51 17.1 1 WG1711789



Cyclohexane 110-82-7 84.20 0.200 0.689 1.96 6.75 1 WG1711789














1,4-Dioxane 123-91-1 88.10 0.200 0.721 ND ND 1 WG1711789

Ethanol 64-17-5 46.10 1.25 2.36 36.8 69.4 1 WG1711789

Ethylbenzene 100-41-4 106 0.200 0.867 0.274 1.19 1 WG1711789






Heptane 142-82-5 100 0.200 0.818 0.910 3.72 1 WG1711789


n-Hexane 110-54-3 86.20 0.630 2.22 20.1 70.9 1 WG1711789




2-Butanone (MEK) 78-93-3 72.10 1.25 3.69 1.69 4.98 1 WG1711789



MTBE 1634-04-4 88.10 0.200 0.721 ND ND 1 WG1711789


2-Propanol 67-63-0 60.10 1.25 3.07 1.83 4.50 1 WG1711789

Propene 115-07-1 42.10 1.25 2.15 75.2 129 1 WG1711789

Styrene 100-42-5 104 0.200 0.851 ND ND 1 WG1711789


Tetrachloroethylene 127-18-4 166 0.200 1.36 0.569 3.86 1 WG1711789

Tetrahydrofuran 109-99-9 72.10 0.200 0.590 0.956 2.82 1 WG1711789

Toluene 108-88-3 92.10 0.500 1.88 3.05 11.5 1 WG1711789


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TVP-BC o l l e c t e d d a t e / t i m e : 0 7 / 2 3 / 2 1 1 0 : 0 1













m&p-Xylene 1330-20-7 106 0.400 1.73 0.637 2.76 1 WG1711789

o-Xylene 95-47-6 106 0.200 0.867 0.248 1.08 1 WG1711789


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TVP-CC o l l e c t e d d a t e / t i m e : 0 7 / 2 3 / 2 1 1 0 : 4 2




Acetone 67-64-1 58.10 1.25 2.97 27.2 64.6 1 WG1711789


Benzene 71-43-2 78.10 0.200 0.639 2.77 8.85 1 WG1711789










Chloroform 67-66-3 119 0.200 0.973 4.82 23.5 1 WG1711789



Cyclohexane 110-82-7 84.20 0.200 0.689 8.55 29.4 1 WG1711789









cis-1,2-Dichloroethene 156-59-2 96.90 0.200 0.793 0.462 1.83 1 WG1711789

trans-1,2-Dichloroethene 156-60-5 96.90 0.200 0.793 0.473 1.87 1 WG1711789




1,4-Dioxane 123-91-1 88.10 0.200 0.721 ND ND 1 WG1711789

Ethanol 64-17-5 46.10 1.25 2.36 37.0 69.8 1 WG1711789

Ethylbenzene 100-41-4 106 0.200 0.867 0.986 4.27 1 WG1711789






Heptane 142-82-5 100 0.200 0.818 2.27 9.28 1 WG1711789


n-Hexane 110-54-3 86.20 0.630 2.22 54.9 194 1 WG1711789




2-Butanone (MEK) 78-93-3 72.10 1.25 3.69 1.76 5.19 1 WG1711789



MTBE 1634-04-4 88.10 0.200 0.721 ND ND 1 WG1711789


2-Propanol 67-63-0 60.10 1.25 3.07 2.50 6.15 1 WG1711789

Propene 115-07-1 42.10 12.5 21.5 159 274 10 WG1712336

Styrene 100-42-5 104 0.200 0.851 0.209 0.889 1 WG1711789


Tetrachloroethylene 127-18-4 166 2.00 13.6 118 801 10 WG1712336


Toluene 108-88-3 92.10 0.500 1.88 8.12 30.6 1 WG1711789


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TVP-CC o l l e c t e d d a t e / t i m e : 0 7 / 2 3 / 2 1 1 0 : 4 2






Trichloroethylene 79-01-6 131 0.200 1.07 7.80 41.8 1 WG1711789







m&p-Xylene 1330-20-7 106 0.400 1.73 1.80 7.80 1 WG1711789

o-Xylene 95-47-6 106 0.200 0.867 0.652 2.83 1 WG1711789



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TVP-DC o l l e c t e d d a t e / t i m e : 0 7 / 2 3 / 2 1 1 1 : 1 6




Acetone 67-64-1 58.10 1.25 2.97 60.4 144 1 WG1711789


Benzene 71-43-2 78.10 0.200 0.639 3.13 10.0 1 WG1711789









Chloroethane 75-00-3 64.50 0.200 0.528 0.252 0.665 1 WG1711789

Chloroform 67-66-3 119 0.200 0.973 5.37 26.1 1 WG1711789



Cyclohexane 110-82-7 84.20 0.200 0.689 17.5 60.3 1 WG1711789














1,4-Dioxane 123-91-1 88.10 0.200 0.721 ND ND 1 WG1711789

Ethanol 64-17-5 46.10 1.25 2.36 30.5 57.5 1 WG1711789

Ethylbenzene 100-41-4 106 0.200 0.867 0.560 2.43 1 WG1711789






Heptane 142-82-5 100 0.200 0.818 3.93 16.1 1 WG1711789


n-Hexane 110-54-3 86.20 0.630 2.22 79.9 282 1 WG1711789




2-Butanone (MEK) 78-93-3 72.10 1.25 3.69 3.68 10.9 1 WG1711789



MTBE 1634-04-4 88.10 0.200 0.721 ND ND 1 WG1711789


2-Propanol 67-63-0 60.10 1.25 3.07 2.48 6.10 1 WG1711789

Propene 115-07-1 42.10 12.5 21.5 249 429 10 WG1712336

Styrene 100-42-5 104 0.200 0.851 ND ND 1 WG1711789




Toluene 108-88-3 92.10 0.500 1.88 7.45 28.1 1 WG1711789


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TVP-DC o l l e c t e d d a t e / t i m e : 0 7 / 2 3 / 2 1 1 1 : 1 6













m&p-Xylene 1330-20-7 106 0.400 1.73 0.991 4.30 1 WG1711789

o-Xylene 95-47-6 106 0.200 0.867 0.372 1.61 1 WG1711789



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TVP-EC o l l e c t e d d a t e / t i m e : 0 7 / 2 3 / 2 1 1 2 : 0 6




Acetone 67-64-1 58.10 1.25 2.97 13.4 31.8 1 WG1711789


Benzene 71-43-2 78.10 0.200 0.639 5.25 16.8 1 WG1711789










Chloroform 67-66-3 119 0.200 0.973 6.65 32.4 1 WG1711789



Cyclohexane 110-82-7 84.20 0.200 0.689 1.91 6.58 1 WG1711789










trans-1,2-Dichloroethene 156-60-5 96.90 0.200 0.793 0.634 2.51 1 WG1711789




1,4-Dioxane 123-91-1 88.10 0.200 0.721 ND ND 1 WG1711789

Ethanol 64-17-5 46.10 1.25 2.36 187 353 E 1 WG1711789

Ethylbenzene 100-41-4 106 0.200 0.867 4.05 17.6 1 WG1711789

4-Ethyltoluene 622-96-8 120 0.200 0.982 0.314 1.54 1 WG1711789

Trichlorofluoromethane 75-69-4 137.40 0.200 1.12 ND ND 1 WG1711789




Heptane 142-82-5 100 0.200 0.818 1.60 6.54 1 WG1711789


n-Hexane 110-54-3 86.20 0.630 2.22 6.61 23.3 1 WG1711789

Isopropylbenzene 98-82-8 120.20 0.200 0.983 0.250 1.23 1 WG1711789



2-Butanone (MEK) 78-93-3 72.10 1.25 3.69 2.41 7.11 1 WG1711789



MTBE 1634-04-4 88.10 0.200 0.721 ND ND 1 WG1711789


2-Propanol 67-63-0 60.10 1.25 3.07 7.29 17.9 1 WG1711789

Propene 115-07-1 42.10 1.25 2.15 11.0 18.9 1 WG1711789

Styrene 100-42-5 104 0.200 0.851 ND ND 1 WG1711789



Tetrahydrofuran 109-99-9 72.10 0.200 0.590 1.81 5.34 1 WG1711789

Toluene 108-88-3 92.10 0.500 1.88 50.9 192 1 WG1711789


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TVP-EC o l l e c t e d d a t e / t i m e : 0 7 / 2 3 / 2 1 1 2 : 0 6













m&p-Xylene 1330-20-7 106 0.400 1.73 5.11 22.2 1 WG1711789

o-Xylene 95-47-6 106 0.200 0.867 2.14 9.28 1 WG1711789

(S) 1,4-Bromofluorobenzene 460-00-4 175 60.0-140 101 WG1711789

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TVP-FC o l l e c t e d d a t e / t i m e : 0 7 / 2 3 / 2 1 1 3 : 5 1




Acetone 67-64-1 58.10 1.25 2.97 9.08 21.6 1 WG1711789


Benzene 71-43-2 78.10 0.200 0.639 0.493 1.57 1 WG1711789










Chloroform 67-66-3 119 0.200 0.973 3.62 17.6 1 WG1711789



Cyclohexane 110-82-7 84.20 0.200 0.689 2.08 7.16 1 WG1711789














1,4-Dioxane 123-91-1 88.10 0.200 0.721 ND ND 1 WG1711789

Ethanol 64-17-5 46.10 1.25 2.36 36.9 69.6 1 WG1711789

Ethylbenzene 100-41-4 106 0.200 0.867 1.33 5.77 1 WG1711789






Heptane 142-82-5 100 0.200 0.818 0.815 3.33 1 WG1711789


n-Hexane 110-54-3 86.20 0.630 2.22 19.7 69.5 1 WG1711789




2-Butanone (MEK) 78-93-3 72.10 1.25 3.69 ND ND 1 WG1711789



MTBE 1634-04-4 88.10 0.200 0.721 ND ND 1 WG1711789


2-Propanol 67-63-0 60.10 1.25 3.07 2.58 6.34 1 WG1711789

Propene 115-07-1 42.10 1.25 2.15 7.60 13.1 1 WG1711789

Styrene 100-42-5 104 0.200 0.851 ND ND 1 WG1711789




Toluene 108-88-3 92.10 0.500 1.88 4.41 16.6 1 WG1711789


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TVP-FC o l l e c t e d d a t e / t i m e : 0 7 / 2 3 / 2 1 1 3 : 5 1













m&p-Xylene 1330-20-7 106 0.400 1.73 1.54 6.68 1 WG1711789

o-Xylene 95-47-6 106 0.200 0.867 0.629 2.73 1 WG1711789


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QUALITY CONTROL SUMMARYWG1711789V o l a t i l e O r g a n i c C o m p o u n d s ( M S ) b y M e t h o d T O - 1 5 L 1 3 8 2 5 9 6 - 0 1 , 0 2 , 0 3 , 0 4 , 0 5 , 0 6

Method Blank (MB)

(MB) R3684187-3 07/26/21 09:36


Analyte ppbv ppbv ppbv

Acetone U 0.584 1.25

Allyl Chloride U 0.114 0.200

Benzene U 0.0715 0.200

Benzyl Chloride U 0.0598 0.200


Bromoform U 0.0732 0.600


1,3-Butadiene U 0.104 2.00

Carbon disulfide U 0.102 0.200




Chloroform U 0.0717 0.200



Cyclohexane U 0.0753 0.200

Dibromochloromethane U 0.0727 0.200

1,2-Dibromoethane U 0.0721 0.200












1,4-Dioxane U 0.0833 0.200


4-Ethyltoluene U 0.0783 0.200




1,2-Dichlorotetrafluoroethane U 0.0890 0.200

Heptane U 0.104 0.200


n-Hexane U 0.206 0.630


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Method Blank (MB)

(MB) R3684187-3 07/26/21 09:36




Methyl Butyl Ketone U 0.133 1.25

2-Butanone (MEK) U 0.0814 1.25


Methyl Methacrylate U 0.0876 0.200

MTBE U 0.0647 0.200


2-Propanol U 0.264 1.25

Propene 0.318 J 0.0932 1.25

Styrene U 0.0788 0.200


Tetrachloroethylene U 0.0814 0.200

Tetrahydrofuran U 0.0734 0.200

Toluene U 0.0870 0.500




Trichloroethylene U 0.0680 0.200



2,2,4-Trimethylpentane U 0.133 0.200


Vinyl Bromide U 0.0852 0.200

Vinyl acetate U 0.116 0.200

m&p-Xylene U 0.135 0.400

o-Xylene U 0.0828 0.200

Ethanol U 0.265 1.25

(S) 1,4-Bromofluorobenzene 92.6 60.0-140


(LCS) R3684187-1 07/26/21 08:37 • (LCSD) R3684187-2 07/26/21 09:08


Analyte ppbv ppbv ppbv % % % % %

Ethanol 3.75 3.58 3.66 95.5 97.6 55.0-148 2.21 25

Propene 3.75 3.53 3.66 94.1 97.6 64.0-144 3.62 25

Dichlorodifluoromethane 3.75 3.80 3.76 101 100 64.0-139 1.06 25

1,2-Dichlorotetrafluoroethane 3.75 3.82 3.77 102 101 70.0-130 1.32 25

Chloromethane 3.75 3.91 3.82 104 102 70.0-130 2.33 25

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(LCS) R3684187-1 07/26/21 08:37 • (LCSD) R3684187-2 07/26/21 09:08



Vinyl chloride 3.75 3.96 3.85 106 103 70.0-130 2.82 25

1,3-Butadiene 3.75 3.86 3.75 103 100 70.0-130 2.89 25

Bromomethane 3.75 3.80 3.74 101 99.7 70.0-130 1.59 25

Chloroethane 3.75 3.79 3.83 101 102 70.0-130 1.05 25

Trichlorofluoromethane 3.75 3.77 3.70 101 98.7 70.0-130 1.87 25

1,1,2-Trichlorotrifluoroethane 3.75 3.82 3.78 102 101 70.0-130 1.05 25

1,1-Dichloroethene 3.75 3.80 3.76 101 100 70.0-130 1.06 25

1,1-Dichloroethane 3.75 3.73 3.82 99.5 102 70.0-130 2.38 25

Acetone 3.75 4.49 4.40 120 117 70.0-130 2.02 25

2-Propanol 3.75 3.78 3.56 101 94.9 70.0-139 5.99 25

Carbon disulfide 3.75 3.65 3.59 97.3 95.7 70.0-130 1.66 25

Methylene Chloride 3.75 3.89 3.77 104 101 70.0-130 3.13 25

MTBE 3.75 3.60 3.63 96.0 96.8 70.0-130 0.830 25


n-Hexane 3.75 3.57 3.64 95.2 97.1 70.0-130 1.94 25

Vinyl acetate 3.75 3.50 3.50 93.3 93.3 70.0-130 0.000 25

Methyl Ethyl Ketone 3.75 3.70 3.74 98.7 99.7 70.0-130 1.08 25


Chloroform 3.75 3.76 3.78 100 101 70.0-130 0.531 25

Cyclohexane 3.75 3.57 3.61 95.2 96.3 70.0-130 1.11 25



Benzene 3.75 3.78 3.71 101 98.9 70.0-130 1.87 25

1,2-Dichloroethane 3.75 3.81 3.80 102 101 70.0-130 0.263 25

Heptane 3.75 3.85 3.82 103 102 70.0-130 0.782 25

Trichloroethylene 3.75 3.79 3.68 101 98.1 70.0-130 2.95 25


1,4-Dioxane 3.75 3.72 3.75 99.2 100 70.0-140 0.803 25




Toluene 3.75 3.59 3.65 95.7 97.3 70.0-130 1.66 25



Tetrachloroethylene 3.75 3.70 3.65 98.7 97.3 70.0-130 1.36 25

Methyl Butyl Ketone 3.75 3.85 3.89 103 104 70.0-149 1.03 25

Dibromochloromethane 3.75 3.74 3.75 99.7 100 70.0-130 0.267 25

1,2-Dibromoethane 3.75 3.76 3.69 100 98.4 70.0-130 1.88 25

Chlorobenzene 3.75 3.78 3.68 101 98.1 70.0-130 2.68 25

Ethylbenzene 3.75 3.72 3.70 99.2 98.7 70.0-130 0.539 25

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Qc

7

Gl

8

Al

9

Sc







(LCS) R3684187-1 07/26/21 08:37 • (LCSD) R3684187-2 07/26/21 09:08



m&p-Xylene 7.50 7.70 7.74 103 103 70.0-130 0.518 25

o-Xylene 3.75 3.90 3.87 104 103 70.0-130 0.772 25

Styrene 3.75 3.75 3.78 100 101 70.0-130 0.797 25

Bromoform 3.75 3.71 3.66 98.9 97.6 70.0-130 1.36 25


4-Ethyltoluene 3.75 4.00 3.97 107 106 70.0-130 0.753 25





Benzyl Chloride 3.75 4.36 4.34 116 116 70.0-152 0.460 25


1,2,4-Trichlorobenzene 3.75 3.55 3.56 94.7 94.9 70.0-160 0.281 25


Naphthalene 3.75 3.95 3.96 105 106 70.0-159 0.253 25

Allyl Chloride 3.75 3.74 3.73 99.7 99.5 70.0-130 0.268 25

2-Chlorotoluene 3.75 3.73 3.75 99.5 100 70.0-130 0.535 25

Methyl Methacrylate 3.75 3.64 3.63 97.1 96.8 70.0-130 0.275 25

Tetrahydrofuran 3.75 3.61 3.64 96.3 97.1 70.0-137 0.828 25

2,2,4-Trimethylpentane 3.75 3.74 3.78 99.7 101 70.0-130 1.06 25

Vinyl Bromide 3.75 3.68 3.67 98.1 97.9 70.0-130 0.272 25


(S) 1,4-Bromofluorobenzene 101 101 60.0-140

1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc





QUALITY CONTROL SUMMARYWG1712336V o l a t i l e O r g a n i c C o m p o u n d s ( M S ) b y M e t h o d T O - 1 5 L 1 3 8 2 5 9 6 - 0 3 , 0 4

Method Blank (MB)

(MB) R3684601-3 07/27/21 10:32



Propene 0.108 J 0.0932 1.25

Tetrachloroethylene U 0.0814 0.200

(S) 1,4-Bromofluorobenzene 95.7 60.0-140


(LCS) R3684601-1 07/27/21 09:08 • (LCSD) R3684601-2 07/27/21 09:51



Propene 3.75 3.91 4.08 104 109 64.0-144 4.26 25

Tetrachloroethylene 3.75 4.33 4.24 115 113 70.0-130 2.10 25

(S) 1,4-Bromofluorobenzene 98.3 98.0 60.0-140

1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc





GLOSSARY OF TERMS






ND Not detected at the Reporting Limit (or MDL where applicable).


Rec. Recovery.






Dilution




Result











E The analyte concentration exceeds the upper limit of the calibration range of the instrument established by the initial calibration (ICAL).


1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc

































A2LA – ISO 17025 ⁵ 1461.02 DOD 1461.01

Canada 1461.01 USDA P330-15-00234






1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc






ANALYTICAL REPORTAugust 02, 2021

ERO Resources




Description: TSC



Denver, CO 80218


August 02, 2021





1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc



August 02, 2021









TABLE OF CONTENTS

Cp: Cover Page 1





TMW-A L1382631-01 6

TMW-B L1382631-02 8

TMW-C L1382631-03 10

TMW-D L1382631-04 12

MW-01 L1382631-05 14

MW-08 L1382631-06 16

MW-10 L1382631-07 18

MW-17 L1382631-08 20

MW-27 L1382631-09 22






1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc





SAMPLE SUMMARY


TMW-A L1382631-01 GW Josh Rosen 07/23/21 13:45 07/24/21 09:00


date/time date/time



TMW-B L1382631-02 GW Josh Rosen 07/23/21 13:30 07/24/21 09:00


date/time date/time



TMW-C L1382631-03 GW Josh Rosen 07/23/21 13:40 07/24/21 09:00


date/time date/time



TMW-D L1382631-04 GW Josh Rosen 07/23/21 14:00 07/24/21 09:00


date/time date/time



MW-01 L1382631-05 GW Josh Rosen 07/23/21 13:55 07/24/21 09:00


date/time date/time



MW-08 L1382631-06 GW Josh Rosen 07/23/21 14:05 07/24/21 09:00


date/time date/time



MW-10 L1382631-07 GW Josh Rosen 07/23/21 13:45 07/24/21 09:00


date/time date/time



MW-17 L1382631-08 GW Josh Rosen 07/23/21 13:55 07/24/21 09:00


date/time date/time


1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc





SAMPLE SUMMARY


MW-27 L1382631-09 GW Josh Rosen 07/23/21 13:20 07/24/21 09:00


date/time date/time


1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc





CASE NARRATIVE




1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc









TMW-AC o l l e c t e d d a t e / t i m e : 0 7 / 2 3 / 2 1 1 3 : 4 5



Analyte mg/l mg/l mg/l date / time

Acetone U 0.0113 0.0500 1 07/27/2021 00:23 WG1712027

Acrolein U 0.00254 0.0500 1 07/27/2021 00:23 WG1712027


Benzene U 0.0000941 0.00100 1 07/27/2021 00:23 WG1712027



Bromoform U 0.000129 0.00100 1 07/27/2021 00:23 WG1712027









2-Chloroethyl vinyl ether U 0.000575 0.0500 1 07/27/2021 00:23 WG1712027

Chloroform 0.000170 J 0.000111 0.00500 1 07/27/2021 00:23 WG1712027



























2-Butanone (MEK) U 0.00119 0.0100 1 07/27/2021 00:23 WG1712027




Naphthalene U 0.00100 0.00500 1 07/27/2021 00:23 WG1712027


Styrene U 0.000118 0.00100 1 07/27/2021 00:23 WG1712027




Toluene U 0.000278 0.00100 1 07/27/2021 00:23 WG1712027



1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc






TMW-AC o l l e c t e d d a t e / t i m e : 0 7 / 2 3 / 2 1 1 3 : 4 5













(S) Toluene-d8 97.5 80.0-120 07/27/2021 00:23 WG1712027



1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc






TMW-BC o l l e c t e d d a t e / t i m e : 0 7 / 2 3 / 2 1 1 3 : 3 0




Acetone U 0.0113 0.0500 1 07/27/2021 00:42 WG1712027

Acrolein U 0.00254 0.0500 1 07/27/2021 00:42 WG1712027


Benzene U 0.0000941 0.00100 1 07/27/2021 00:42 WG1712027



Bromoform U 0.000129 0.00100 1 07/27/2021 00:42 WG1712027










Chloroform U 0.000111 0.00500 1 07/27/2021 00:42 WG1712027



























2-Butanone (MEK) U 0.00119 0.0100 1 07/27/2021 00:42 WG1712027



Methyl tert-butyl ether 0.00101 0.000101 0.00100 1 07/27/2021 00:42 WG1712027

Naphthalene U 0.00100 0.00500 1 07/27/2021 00:42 WG1712027


Styrene U 0.000118 0.00100 1 07/27/2021 00:42 WG1712027




Toluene U 0.000278 0.00100 1 07/27/2021 00:42 WG1712027



1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc






TMW-BC o l l e c t e d d a t e / t i m e : 0 7 / 2 3 / 2 1 1 3 : 3 0













(S) Toluene-d8 97.6 80.0-120 07/27/2021 00:42 WG1712027



1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc






TMW-CC o l l e c t e d d a t e / t i m e : 0 7 / 2 3 / 2 1 1 3 : 4 0




Acetone U 0.0113 0.0500 1 07/27/2021 01:01 WG1712027

Acrolein U 0.00254 0.0500 1 07/27/2021 01:01 WG1712027


Benzene U 0.0000941 0.00100 1 07/27/2021 01:01 WG1712027



Bromoform U 0.000129 0.00100 1 07/27/2021 01:01 WG1712027










Chloroform U 0.000111 0.00500 1 07/27/2021 01:01 WG1712027



























2-Butanone (MEK) U 0.00119 0.0100 1 07/27/2021 01:01 WG1712027




Naphthalene U 0.00100 0.00500 1 07/27/2021 01:01 WG1712027


Styrene U 0.000118 0.00100 1 07/27/2021 01:01 WG1712027



Tetrachloroethene 0.00609 0.000300 0.00100 1 07/27/2021 01:01 WG1712027

Toluene U 0.000278 0.00100 1 07/27/2021 01:01 WG1712027



1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc






TMW-CC o l l e c t e d d a t e / t i m e : 0 7 / 2 3 / 2 1 1 3 : 4 0













(S) Toluene-d8 97.5 80.0-120 07/27/2021 01:01 WG1712027



1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc






TMW-DC o l l e c t e d d a t e / t i m e : 0 7 / 2 3 / 2 1 1 4 : 0 0




Acetone U 0.0113 0.0500 1 07/27/2021 01:20 WG1712027

Acrolein U 0.00254 0.0500 1 07/27/2021 01:20 WG1712027


Benzene U 0.0000941 0.00100 1 07/27/2021 01:20 WG1712027



Bromoform U 0.000129 0.00100 1 07/27/2021 01:20 WG1712027










Chloroform U 0.000111 0.00500 1 07/27/2021 01:20 WG1712027



























2-Butanone (MEK) U 0.00119 0.0100 1 07/27/2021 01:20 WG1712027




Naphthalene U 0.00100 0.00500 1 07/27/2021 01:20 WG1712027


Styrene U 0.000118 0.00100 1 07/27/2021 01:20 WG1712027



Tetrachloroethene 0.0149 0.000300 0.00100 1 07/27/2021 01:20 WG1712027

Toluene U 0.000278 0.00100 1 07/27/2021 01:20 WG1712027



1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc






TMW-DC o l l e c t e d d a t e / t i m e : 0 7 / 2 3 / 2 1 1 4 : 0 0













(S) Toluene-d8 98.2 80.0-120 07/27/2021 01:20 WG1712027



1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc






MW-01C o l l e c t e d d a t e / t i m e : 0 7 / 2 3 / 2 1 1 3 : 5 5




Acetone U 0.0113 0.0500 1 07/27/2021 01:39 WG1712027

Acrolein U 0.00254 0.0500 1 07/27/2021 01:39 WG1712027


Benzene U 0.0000941 0.00100 1 07/27/2021 01:39 WG1712027



Bromoform U 0.000129 0.00100 1 07/27/2021 01:39 WG1712027










Chloroform U 0.000111 0.00500 1 07/27/2021 01:39 WG1712027



























2-Butanone (MEK) U 0.00119 0.0100 1 07/27/2021 01:39 WG1712027




Naphthalene U 0.00100 0.00500 1 07/27/2021 01:39 WG1712027


Styrene U 0.000118 0.00100 1 07/27/2021 01:39 WG1712027




Toluene U 0.000278 0.00100 1 07/27/2021 01:39 WG1712027



1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc



















(S) Toluene-d8 96.7 80.0-120 07/27/2021 01:39 WG1712027



1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc










Acetone U 0.0113 0.0500 1 07/27/2021 01:58 WG1712027

Acrolein U 0.00254 0.0500 1 07/27/2021 01:58 WG1712027


Benzene U 0.0000941 0.00100 1 07/27/2021 01:58 WG1712027



Bromoform U 0.000129 0.00100 1 07/27/2021 01:58 WG1712027






Chlorobenzene 0.000446 J 0.000116 0.00100 1 07/27/2021 01:58 WG1712027




Chloroform U 0.000111 0.00500 1 07/27/2021 01:58 WG1712027



























2-Butanone (MEK) U 0.00119 0.0100 1 07/27/2021 01:58 WG1712027




Naphthalene U 0.00100 0.00500 1 07/27/2021 01:58 WG1712027


Styrene U 0.000118 0.00100 1 07/27/2021 01:58 WG1712027



Tetrachloroethene 0.000593 J 0.000300 0.00100 1 07/27/2021 01:58 WG1712027

Toluene U 0.000278 0.00100 1 07/27/2021 01:58 WG1712027



1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc



















(S) Toluene-d8 97.5 80.0-120 07/27/2021 01:58 WG1712027



1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc










Acetone U 0.0113 0.0500 1 07/27/2021 02:17 WG1712027

Acrolein U 0.00254 0.0500 1 07/27/2021 02:17 WG1712027


Benzene U 0.0000941 0.00100 1 07/27/2021 02:17 WG1712027



Bromoform U 0.000129 0.00100 1 07/27/2021 02:17 WG1712027










Chloroform 0.000652 J 0.000111 0.00500 1 07/27/2021 02:17 WG1712027



























2-Butanone (MEK) U 0.00119 0.0100 1 07/27/2021 02:17 WG1712027




Naphthalene U 0.00100 0.00500 1 07/27/2021 02:17 WG1712027


Styrene U 0.000118 0.00100 1 07/27/2021 02:17 WG1712027




Toluene U 0.000278 0.00100 1 07/27/2021 02:17 WG1712027



1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc



















(S) Toluene-d8 97.9 80.0-120 07/27/2021 02:17 WG1712027



1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc










Acetone U 0.0113 0.0500 1 07/27/2021 02:36 WG1712027

Acrolein U 0.00254 0.0500 1 07/27/2021 02:36 WG1712027


Benzene U 0.0000941 0.00100 1 07/27/2021 02:36 WG1712027



Bromoform U 0.000129 0.00100 1 07/27/2021 02:36 WG1712027










Chloroform U 0.000111 0.00500 1 07/27/2021 02:36 WG1712027



























2-Butanone (MEK) U 0.00119 0.0100 1 07/27/2021 02:36 WG1712027



Methyl tert-butyl ether 0.000335 J 0.000101 0.00100 1 07/27/2021 02:36 WG1712027

Naphthalene U 0.00100 0.00500 1 07/27/2021 02:36 WG1712027


Styrene U 0.000118 0.00100 1 07/27/2021 02:36 WG1712027




Toluene U 0.000278 0.00100 1 07/27/2021 02:36 WG1712027



1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc



















(S) Toluene-d8 96.4 80.0-120 07/27/2021 02:36 WG1712027



1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc










Acetone U 0.0113 0.0500 1 07/27/2021 02:55 WG1712027

Acrolein U 0.00254 0.0500 1 07/27/2021 02:55 WG1712027


Benzene U 0.0000941 0.00100 1 07/27/2021 02:55 WG1712027



Bromoform U 0.000129 0.00100 1 07/27/2021 02:55 WG1712027










Chloroform U 0.000111 0.00500 1 07/27/2021 02:55 WG1712027



























2-Butanone (MEK) U 0.00119 0.0100 1 07/27/2021 02:55 WG1712027




Naphthalene U 0.00100 0.00500 1 07/27/2021 02:55 WG1712027


Styrene U 0.000118 0.00100 1 07/27/2021 02:55 WG1712027




Toluene U 0.000278 0.00100 1 07/27/2021 02:55 WG1712027



1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc



















(S) Toluene-d8 95.3 80.0-120 07/27/2021 02:55 WG1712027



1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc





QUALITY CONTROL SUMMARYWG1712027V o l a t i l e O r g a n i c C o m p o u n d s ( G C / M S ) b y M e t h o d 8 2 6 0 B L 1 3 8 2 6 3 1 - 0 1 , 0 2 , 0 3 , 0 4 , 0 5 , 0 6 , 0 7 , 0 8 , 0 9

Method Blank (MB)

(MB) R3686403-3 07/26/21 21:49


Analyte mg/l mg/l mg/l

Acetone U 0.0113 0.0500

Acrolein U 0.00254 0.0500


Benzene U 0.0000941 0.00100



Bromoform U 0.000129 0.00100









2-Chloroethyl vinyl ether U 0.000575 0.0500

Chloroform U 0.000111 0.00500





1,2-Dibromoethane U 0.000126 0.00100



















1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc






Method Blank (MB)

(MB) R3686403-3 07/26/21 21:49






2-Butanone (MEK) U 0.00119 0.0100






Styrene U 0.000118 0.00100




Toluene U 0.000278 0.00100











Xylenes, Total U 0.000174 0.00300

(S) Toluene-d8 96.7 80.0-120




(LCS) R3686403-1 07/26/21 20:33 • (LCSD) R3686403-2 07/26/21 20:52


Analyte mg/l mg/l mg/l % % % % %

Acetone 0.0250 0.0234 0.0191 93.6 76.4 19.0-160 20.2 27

Acrolein 0.0250 0.0174 0.0152 69.6 60.8 10.0-160 13.5 26

Acrylonitrile 0.0250 0.0252 0.0225 101 90.0 55.0-149 11.3 20

Benzene 0.00500 0.00474 0.00460 94.8 92.0 70.0-123 3.00 20

Bromobenzene 0.00500 0.00486 0.00457 97.2 91.4 73.0-121 6.15 20

1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc







(LCS) R3686403-1 07/26/21 20:33 • (LCSD) R3686403-2 07/26/21 20:52




Bromoform 0.00500 0.00448 0.00423 89.6 84.6 68.0-132 5.74 20

Bromomethane 0.00500 0.00397 0.00361 79.4 72.2 10.0-160 9.50 25

n-Butylbenzene 0.00500 0.00371 0.00359 74.2 71.8 73.0-125 J4 3.29 20


tert-Butylbenzene 0.00500 0.00500 0.00494 100 98.8 76.0-124 1.21 20


Chlorobenzene 0.00500 0.00452 0.00438 90.4 87.6 80.0-121 3.15 20


Chloroethane 0.00500 0.00376 0.00343 75.2 68.6 47.0-150 9.18 20

2-Chloroethyl vinyl ether 0.0250 0.0292 0.0287 117 115 51.0-160 1.73 20

Chloroform 0.00500 0.00463 0.00455 92.6 91.0 73.0-120 1.74 20

Chloromethane 0.00500 0.00433 0.00430 86.6 86.0 41.0-142 0.695 20

2-Chlorotoluene 0.00500 0.00476 0.00466 95.2 93.2 76.0-123 2.12 20

4-Chlorotoluene 0.00500 0.00487 0.00465 97.4 93.0 75.0-122 4.62 20


1,2-Dibromoethane 0.00500 0.00503 0.00478 101 95.6 80.0-122 5.10 20

Dibromomethane 0.00500 0.00501 0.00477 100 95.4 80.0-120 4.91 20





1,1-Dichloroethane 0.00500 0.00490 0.00481 98.0 96.2 70.0-126 1.85 20

1,2-Dichloroethane 0.00500 0.00517 0.00497 103 99.4 70.0-128 3.94 20

1,1-Dichloroethene 0.00500 0.00401 0.00407 80.2 81.4 71.0-124 1.49 20









Di-isopropyl ether 0.00500 0.00518 0.00495 104 99.0 58.0-138 4.54 20

Ethylbenzene 0.00500 0.00455 0.00429 91.0 85.8 79.0-123 5.88 20




2-Butanone (MEK) 0.0250 0.0312 0.0316 125 126 44.0-160 1.27 20


1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc







(LCS) R3686403-1 07/26/21 20:33 • (LCSD) R3686403-2 07/26/21 20:52





Naphthalene 0.00500 0.00270 0.00298 54.0 59.6 54.0-135 9.86 20

n-Propylbenzene 0.00500 0.00449 0.00434 89.8 86.8 77.0-124 3.40 20

Styrene 0.00500 0.00411 0.00391 82.2 78.2 73.0-130 4.99 20




Toluene 0.00500 0.00462 0.00452 92.4 90.4 79.0-120 2.19 20

1,2,3-Trichlorobenzene 0.00500 0.00223 0.00243 44.6 48.6 50.0-138 J4 J4 8.58 20




Trichloroethene 0.00500 0.00458 0.00444 91.6 88.8 78.0-124 3.10 20





Vinyl chloride 0.00500 0.00424 0.00418 84.8 83.6 67.0-131 1.43 20

Xylenes, Total 0.0150 0.0137 0.0132 91.3 88.0 79.0-123 3.72 20

(S) Toluene-d8 98.7 98.8 80.0-120



1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc





GLOSSARY OF TERMS







Rec. Recovery.






Dilution




Result













1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc

































A2LA – ISO 17025 ⁵ 1461.02 DOD 1461.01

Canada 1461.01 USDA P330-15-00234






1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc






ANALYTICAL REPORTSeptember 08, 2021

ERO Resources




Description: Thornton Shopping Ctr.



Denver, CO 80218


September 08, 2021





1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc



September 08, 2021





mailto:[email protected]?subject=Pace Analytical National SDG: L1396701 - PN: 10197&body=Email regarding SDG: L1396701 - Project Number: 10197




TABLE OF CONTENTS

Cp: Cover Page 1





TMW-E 18' L1396701-01 5

TMW-E 25' L1396701-02 7

TMW-F 19' L1396701-03 9

TMW-F 24' L1396701-04 11

TMW-G 18.5' L1396701-05 13

TMW-G 25' L1396701-06 15






1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc





SAMPLE SUMMARY


TMW-E 18' L1396701-01 Solid Josh Rosen 08/26/21 09:50 08/30/21 10:00


date/time date/time



TMW-E 25' L1396701-02 Solid Josh Rosen 08/26/21 10:20 08/30/21 10:00


date/time date/time



TMW-F 19' L1396701-03 Solid Josh Rosen 08/26/21 12:05 08/30/21 10:00


date/time date/time



TMW-F 24' L1396701-04 Solid Josh Rosen 08/26/21 12:50 08/30/21 10:00


date/time date/time



TMW-G 18.5' L1396701-05 Solid Josh Rosen 08/26/21 13:00 08/30/21 10:00


date/time date/time



TMW-G 25' L1396701-06 Solid Josh Rosen 08/26/21 13:20 08/30/21 10:00


date/time date/time


1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc





CASE NARRATIVE




1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc









TMW-E 18'C o l l e c t e d d a t e / t i m e : 0 8 / 2 6 / 2 1 0 9 : 5 0




Acetone U 0.0365 0.0500 1 09/05/2021 01:11 WG1735230


Benzene U 0.000467 0.00100 1 09/05/2021 01:11 WG1735230



Bromoform U 0.00117 0.0250 1 09/05/2021 01:11 WG1735230









Chloroform U 0.00103 0.00250 1 09/05/2021 01:11 WG1735230



























2-Butanone (MEK) U 0.0635 0.100 1 09/05/2021 01:11 WG1735230






Styrene U 0.000229 0.0125 1 09/05/2021 01:11 WG1735230





Toluene U 0.00130 0.00500 1 09/05/2021 01:11 WG1735230




1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc



















(S) Toluene-d8 105 75.0-131 09/05/2021 01:11 WG1735230



1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc










Acetone U 0.0365 0.0500 1 09/05/2021 01:30 WG1735230


Benzene U 0.000467 0.00100 1 09/05/2021 01:30 WG1735230



Bromoform U 0.00117 0.0250 1 09/05/2021 01:30 WG1735230









Chloroform U 0.00103 0.00250 1 09/05/2021 01:30 WG1735230



























2-Butanone (MEK) U 0.0635 0.100 1 09/05/2021 01:30 WG1735230






Styrene U 0.000229 0.0125 1 09/05/2021 01:30 WG1735230





Toluene U 0.00130 0.00500 1 09/05/2021 01:30 WG1735230




1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc



















(S) Toluene-d8 105 75.0-131 09/05/2021 01:30 WG1735230



1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc






TMW-F 19'C o l l e c t e d d a t e / t i m e : 0 8 / 2 6 / 2 1 1 2 : 0 5




Acetone U 0.0365 0.0500 1 09/05/2021 01:49 WG1735230


Benzene U 0.000467 0.00100 1 09/05/2021 01:49 WG1735230



Bromoform U 0.00117 0.0250 1 09/05/2021 01:49 WG1735230









Chloroform U 0.00103 0.00250 1 09/05/2021 01:49 WG1735230



























2-Butanone (MEK) U 0.0635 0.100 1 09/05/2021 01:49 WG1735230






Styrene U 0.000229 0.0125 1 09/05/2021 01:49 WG1735230





Toluene U 0.00130 0.00500 1 09/05/2021 01:49 WG1735230




1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc



















(S) Toluene-d8 105 75.0-131 09/05/2021 01:49 WG1735230



1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc










Acetone U 0.0365 0.0500 1 09/05/2021 02:08 WG1735230


Benzene U 0.000467 0.00100 1 09/05/2021 02:08 WG1735230



Bromoform U 0.00117 0.0250 1 09/05/2021 02:08 WG1735230









Chloroform U 0.00103 0.00250 1 09/05/2021 02:08 WG1735230



























2-Butanone (MEK) U 0.0635 0.100 1 09/05/2021 02:08 WG1735230






Styrene U 0.000229 0.0125 1 09/05/2021 02:08 WG1735230





Toluene U 0.00130 0.00500 1 09/05/2021 02:08 WG1735230




1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc



















(S) Toluene-d8 103 75.0-131 09/05/2021 02:08 WG1735230



1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc






TMW-G 18.5'C o l l e c t e d d a t e / t i m e : 0 8 / 2 6 / 2 1 1 3 : 0 0




Acetone U 0.0365 0.0500 1 09/05/2021 02:27 WG1735230


Benzene U 0.000467 0.00100 1 09/05/2021 02:27 WG1735230



Bromoform U 0.00117 0.0250 1 09/05/2021 02:27 WG1735230









Chloroform U 0.00103 0.00250 1 09/05/2021 02:27 WG1735230



























2-Butanone (MEK) U 0.0635 0.100 1 09/05/2021 02:27 WG1735230






Styrene U 0.000229 0.0125 1 09/05/2021 02:27 WG1735230





Toluene U 0.00130 0.00500 1 09/05/2021 02:27 WG1735230




1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc






TMW-G 18.5'C o l l e c t e d d a t e / t i m e : 0 8 / 2 6 / 2 1 1 3 : 0 0













(S) Toluene-d8 105 75.0-131 09/05/2021 02:27 WG1735230



1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc






TMW-G 25'C o l l e c t e d d a t e / t i m e : 0 8 / 2 6 / 2 1 1 3 : 2 0




Acetone U 0.0365 0.0500 1 09/05/2021 02:46 WG1735230


Benzene U 0.000467 0.00100 1 09/05/2021 02:46 WG1735230



Bromoform U 0.00117 0.0250 1 09/05/2021 02:46 WG1735230









Chloroform U 0.00103 0.00250 1 09/05/2021 02:46 WG1735230



























2-Butanone (MEK) U 0.0635 0.100 1 09/05/2021 02:46 WG1735230






Styrene U 0.000229 0.0125 1 09/05/2021 02:46 WG1735230





Toluene U 0.00130 0.00500 1 09/05/2021 02:46 WG1735230




1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc






TMW-G 25'C o l l e c t e d d a t e / t i m e : 0 8 / 2 6 / 2 1 1 3 : 2 0













(S) Toluene-d8 103 75.0-131 09/05/2021 02:46 WG1735230



1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc





QUALITY CONTROL SUMMARYWG1735230V o l a t i l e O r g a n i c C o m p o u n d s ( G C / M S ) b y M e t h o d 8 2 6 0 B L 1 3 9 6 7 0 1 - 0 1 , 0 2 , 0 3 , 0 4 , 0 5 , 0 6

Method Blank (MB)

(MB) R3701657-3 09/05/21 00:33



Acetone U 0.0365 0.0500


Benzene U 0.000467 0.00100



Bromoform U 0.00117 0.0250









Chloroform U 0.00103 0.00250





1,2-Dibromoethane U 0.000648 0.00250





















1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc






Method Blank (MB)

(MB) R3701657-3 09/05/21 00:33




2-Butanone (MEK) U 0.0635 0.100






Styrene U 0.000229 0.0125




Toluene U 0.00130 0.00500










1,2,4-Trimethylbenzene 0.00190 J 0.00158 0.00500



Xylenes, Total U 0.000880 0.00650

(S) Toluene-d8 102 75.0-131




(LCS) R3701657-1 09/04/21 23:17 • (LCSD) R3701657-2 09/04/21 23:36



Acetone 0.625 0.529 0.555 84.6 88.8 10.0-160 4.80 31

Acrylonitrile 0.625 0.483 0.520 77.3 83.2 45.0-153 7.38 22

Benzene 0.125 0.122 0.122 97.6 97.6 70.0-123 0.000 20

Bromobenzene 0.125 0.124 0.125 99.2 100 73.0-121 0.803 20

Bromodichloromethane 0.125 0.124 0.126 99.2 101 73.0-121 1.60 20

1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc







(LCS) R3701657-1 09/04/21 23:17 • (LCSD) R3701657-2 09/04/21 23:36



Bromoform 0.125 0.111 0.112 88.8 89.6 64.0-132 0.897 20

Bromomethane 0.125 0.109 0.123 87.2 98.4 56.0-147 12.1 20

n-Butylbenzene 0.125 0.104 0.108 83.2 86.4 68.0-135 3.77 20


tert-Butylbenzene 0.125 0.110 0.111 88.0 88.8 75.0-127 0.905 20

Carbon tetrachloride 0.125 0.118 0.125 94.4 100 66.0-128 5.76 20

Chlorobenzene 0.125 0.125 0.124 100 99.2 76.0-128 0.803 20


Chloroethane 0.125 0.112 0.122 89.6 97.6 61.0-134 8.55 20

Chloroform 0.125 0.132 0.138 106 110 72.0-123 4.44 20

Chloromethane 0.125 0.124 0.124 99.2 99.2 51.0-138 0.000 20

2-Chlorotoluene 0.125 0.120 0.128 96.0 102 75.0-124 6.45 20

4-Chlorotoluene 0.125 0.122 0.121 97.6 96.8 75.0-124 0.823 20


1,2-Dibromoethane 0.125 0.120 0.121 96.0 96.8 74.0-128 0.830 20

Dibromomethane 0.125 0.127 0.129 102 103 75.0-122 1.56 20


1,3-Dichlorobenzene 0.125 0.123 0.125 98.4 100 76.0-125 1.61 20


Dichlorodifluoromethane 0.125 0.166 0.163 133 130 43.0-156 1.82 20

1,1-Dichloroethane 0.125 0.128 0.130 102 104 70.0-127 1.55 20

1,2-Dichloroethane 0.125 0.130 0.132 104 106 65.0-131 1.53 20

1,1-Dichloroethene 0.125 0.134 0.139 107 111 65.0-131 3.66 20










Ethylbenzene 0.125 0.124 0.126 99.2 101 74.0-126 1.60 20



p-Isopropyltoluene 0.125 0.109 0.108 87.2 86.4 72.0-133 0.922 20

2-Butanone (MEK) 0.625 0.487 0.480 77.9 76.8 30.0-160 1.45 24


4-Methyl-2-pentanone (MIBK) 0.625 0.524 0.528 83.8 84.5 56.0-143 0.760 20


1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc







(LCS) R3701657-1 09/04/21 23:17 • (LCSD) R3701657-2 09/04/21 23:36



Naphthalene 0.125 0.0790 0.0736 63.2 58.9 59.0-130 J4 7.08 20

n-Propylbenzene 0.125 0.120 0.122 96.0 97.6 74.0-126 1.65 20

Styrene 0.125 0.119 0.117 95.2 93.6 72.0-127 1.69 20




Toluene 0.125 0.127 0.125 102 100 75.0-121 1.59 20

1,1,2-Trichlorotrifluoroethane 0.125 0.195 0.203 156 162 61.0-139 J4 J4 4.02 20

1,2,3-Trichlorobenzene 0.125 0.0618 0.0572 49.4 45.8 59.0-139 J4 J4 7.73 20










Vinyl chloride 0.125 0.113 0.113 90.4 90.4 63.0-134 0.000 20

Xylenes, Total 0.375 0.373 0.371 99.5 98.9 72.0-127 0.538 20

(S) Toluene-d8 104 103 75.0-131




(OS) L1397195-05 09/05/21 06:54 • (MS) R3701657-4 09/05/21 07:13 • (MSD) R3701657-5 09/05/21 07:32



Acetone 5.00 U 1.73 3.58 34.6 71.6 8 10.0-160 J3 69.7 40

Acrylonitrile 5.00 U 4.60 4.12 92.0 82.4 8 10.0-160 11.0 40

Benzene 1.00 U 0.527 0.514 52.7 51.4 8 10.0-149 2.50 37

Bromobenzene 1.00 U 0.742 0.697 74.2 69.7 8 10.0-156 6.25 38


Bromoform 1.00 U 0.654 0.664 65.4 66.4 8 10.0-146 1.52 36

Bromomethane 1.00 U 0.402 0.399 40.2 39.9 8 10.0-149 0.749 38

n-Butylbenzene 1.00 0.274 1.11 1.03 83.6 75.6 8 10.0-160 7.48 40

sec-Butylbenzene 1.00 0.792 2.18 2.06 139 127 8 10.0-159 5.66 39

tert-Butylbenzene 1.00 0.252 1.05 0.996 79.8 74.4 8 10.0-156 5.28 39

1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc







(OS) L1397195-05 09/05/21 06:54 • (MS) R3701657-4 09/05/21 07:13 • (MSD) R3701657-5 09/05/21 07:32



Carbon tetrachloride 1.00 U 0.492 0.476 49.2 47.6 8 10.0-145 3.31 37

Chlorobenzene 1.00 U 0.788 0.788 78.8 78.8 8 10.0-152 0.000 39


Chloroethane 1.00 U 0.434 0.392 43.4 39.2 8 10.0-146 10.2 40

Chloroform 1.00 U 0.629 0.640 62.9 64.0 8 10.0-146 1.73 37

Chloromethane 1.00 U 0.470 0.438 47.0 43.8 8 10.0-159 7.05 37

2-Chlorotoluene 1.00 U 1.89 2.11 189 211 8 10.0-159 J5 J5 11.0 38

4-Chlorotoluene 1.00 U 0.989 0.715 98.9 71.5 8 10.0-155 32.2 39


1,2-Dibromoethane 1.00 U 0.780 0.788 78.0 78.8 8 10.0-148 1.02 34





Dichlorodifluoromethane 1.00 U 0.600 0.554 60.0 55.4 8 10.0-160 7.97 35



1,1-Dichloroethene 1.00 U 0.507 0.487 50.7 48.7 8 10.0-155 4.02 37


trans-1,2-Dichloroethene 1.00 U 0.502 0.497 50.2 49.7 8 10.0-150 1.00 37


1,1-Dichloropropene 1.00 U 0.469 0.447 46.9 44.7 8 10.0-153 4.80 35






Ethylbenzene 1.00 U 0.477 0.451 47.7 45.1 8 10.0-160 5.60 38

Hexachloro-1,3-butadiene 1.00 U 1.04 0.937 104 93.7 8 10.0-160 10.4 40

Isopropylbenzene 1.00 0.107 0.652 0.648 54.5 54.1 8 10.0-155 0.615 38

p-Isopropyltoluene 1.00 U 0.564 0.524 56.4 52.4 8 10.0-160 7.35 40

2-Butanone (MEK) 5.00 U 3.67 3.77 73.4 75.4 8 10.0-160 2.69 40


4-Methyl-2-pentanone (MIBK) 5.00 1.07 3.73 4.12 53.2 61.0 8 10.0-160 9.94 35


Naphthalene 1.00 U 0.671 0.703 67.1 70.3 8 10.0-160 4.66 36

n-Propylbenzene 1.00 0.154 0.929 0.917 77.5 76.3 8 10.0-158 1.30 38

Styrene 1.00 U 0.537 0.538 53.7 53.8 8 10.0-160 0.186 40


1,1,2,2-Tetrachloroethane 1.00 U 27.7 27.3 2770 2730 8 10.0-160 E J5 E J5 1.45 35

1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc







(OS) L1397195-05 09/05/21 06:54 • (MS) R3701657-4 09/05/21 07:13 • (MSD) R3701657-5 09/05/21 07:32



Tetrachloroethene 1.00 U 0.492 0.453 49.2 45.3 8 10.0-156 8.25 39

Toluene 1.00 U 0.518 0.487 51.8 48.7 8 10.0-156 6.17 38

1,1,2-Trichlorotrifluoroethane 1.00 U 0.730 0.690 73.0 69.0 8 10.0-160 5.63 36





Trichloroethene 1.00 U 0.573 0.592 57.3 59.2 8 10.0-156 3.26 38

Trichlorofluoromethane 1.00 U 0.613 0.545 61.3 54.5 8 10.0-160 11.7 40

1,2,3-Trichloropropane 1.00 U 4.82 6.91 482 691 8 10.0-156 J5 J3 J5 35.6 35




Vinyl chloride 1.00 U 0.377 0.363 37.7 36.3 8 10.0-160 3.78 37

Xylenes, Total 3.00 U 1.43 1.41 47.7 47.0 8 10.0-160 1.41 38

(S) Toluene-d8 95.3 93.7 75.0-131

(S) 4-Bromofluorobenzene 224 228 67.0-138 J1 J1


1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc





GLOSSARY OF TERMS







Rec. Recovery.






Dilution





Result











E The analyte concentration exceeds the upper limit of the calibration range of the instrument established by the initial calibration (ICAL).


J1 Surrogate recovery limits have been exceeded; values are outside upper control limits.



J5 The sample matrix interfered with the ability to make any accurate determination; spike value is high.

1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc

































A2LA – ISO 17025 ⁵ 1461.02 DOD 1461.01

Canada 1461.01 USDA P330-15-00234






1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc






ANALYTICAL REPORTSeptember 09, 2021

ERO Resources




Description: Thornton Shopping Ctr.



Denver, CO 80218


September 09, 2021





1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc



September 09, 2021





mailto:[email protected]?subject=Pace Analytical National SDG: L1397760 - PN: 10197&body=Email regarding SDG: L1397760 - Project Number: 10197




TABLE OF CONTENTS

Cp: Cover Page 1





MW-G L1397760-01 5

MW-E L1397760-02 7

MW-F L1397760-03 9






1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc





SAMPLE SUMMARY


MW-G L1397760-01 GW Josh Rosen 08/31/21 10:20 09/01/21 13:15


date/time date/time

Volatile Organic Compounds (GC/MS) by Method 8260B WG1735518 1 09/06/21 01:42 09/06/21 01:42 JCP Mt. Juliet, TN


MW-E L1397760-02 GW Josh Rosen 08/31/21 11:25 09/01/21 13:15


date/time date/time



MW-F L1397760-03 GW Josh Rosen 08/31/21 12:20 09/01/21 13:15


date/time date/time


1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc





CASE NARRATIVE




1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc









MW-GC o l l e c t e d d a t e / t i m e : 0 8 / 3 1 / 2 1 1 0 : 2 0




Acetone 0.0119 J 0.0113 0.0500 1 09/06/2021 01:42 WG1735518

Acrolein U 0.00254 0.0500 1 09/06/2021 01:42 WG1735518


Benzene U 0.0000941 0.00100 1 09/06/2021 01:42 WG1735518



Bromoform U 0.000129 0.00100 1 09/06/2021 01:42 WG1735518









Chloroform U 0.000111 0.00500 1 09/06/2021 01:42 WG1735518


























p-Isopropyltoluene 0.00228 0.000120 0.00100 1 09/06/2021 01:42 WG1735518

2-Butanone (MEK) 0.00122 J 0.00119 0.0100 1 09/06/2021 01:42 WG1735518


4-Methyl-2-pentanone (MIBK) 0.000571 J 0.000478 0.0100 1 09/06/2021 01:42 WG1735518


Naphthalene U 0.00100 0.00500 1 09/06/2021 01:42 WG1735518

n-Propylbenzene 0.000153 J 0.0000993 0.00100 1 09/06/2021 01:42 WG1735518

Styrene U 0.000118 0.00100 1 09/06/2021 01:42 WG1735518





Toluene 0.000283 J 0.000278 0.00100 1 09/06/2021 01:42 WG1735518



1

Cp

2

Tc

3

Ss

4

Cn

5

Sr

6

Qc

7

Gl

8

Al

9

Sc






MW-GC o l l e c t e d d a t e / t i m e : 0 8 / 3 1 / 2 1 1 0 : 2 0









1,2,4-Trimethylbenzene 0.000355 J 0.000322 0.00100 1 09/06/2021 01:42 WG1735518





(S) Toluene-d8 99.6 80.0-120 09/06/2021 01:42 WG1735518



1

Cp

2

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3

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4

Cn

5

Sr

6

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7

Gl

8

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9

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MW-EC o l l e c t e d d a t e / t i m e : 0 8 / 3 1 / 2 1 1 1 : 2 5




Acetone U 0.0113 0.0500 1 09/06/2021 02:02 WG1735518

Acrolein U 0.00254 0.0500 1 09/06/2021 02:02 WG1735518


Benzene U 0.0000941 0.00100 1 09/06/2021 02:02 WG1735518



Bromoform U 0.000129 0.00100 1 09/06/2021 02:02 WG1735518









Chloroform U 0.000111 0.00500 1 09/06/2021 02:02 WG1735518























Ethylbenzene 0.000241 J 0.000137 0.00100 1 09/06/2021 02:02 WG1735518



p-Isopropyltoluene 0.00199 0.000120 0.00100 1 09/06/2021 02:02 WG1735518

2-Butanone (MEK) U 0.00119 0.0100 1 09/06/2021 02:02 WG1735518




Naphthalene U 0.00100 0.00500 1 09/06/2021 02:02 WG1735518


Styrene U 0.000118 0.00100 1 09/06/2021 02:02 WG1735518





Toluene 0.000320 J 0.000278 0.00100 1 09/06/2021 02:02 WG1735518



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MW-EC o l l e c t e d d a t e / t i m e : 0 8 / 3 1 / 2 1 1 1 : 2 5














(S) Toluene-d8 98.1 80.0-120 09/06/2021 02:02 WG1735518



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MW-FC o l l e c t e d d a t e / t i m e : 0 8 / 3 1 / 2 1 1 2 : 2 0




Acetone U 0.0113 0.0500 1 09/06/2021 02:22 WG1735518

Acrolein U 0.00254 0.0500 1 09/06/2021 02:22 WG1735518


Benzene U 0.0000941 0.00100 1 09/06/2021 02:22 WG1735518



Bromoform U 0.000129 0.00100 1 09/06/2021 02:22 WG1735518









Chloroform U 0.000111 0.00500 1 09/06/2021 02:22 WG1735518























Ethylbenzene 0.000253 J 0.000137 0.00100 1 09/06/2021 02:22 WG1735518



p-Isopropyltoluene 0.000854 J 0.000120 0.00100 1 09/06/2021 02:22 WG1735518

2-Butanone (MEK) 0.00150 J 0.00119 0.0100 1 09/06/2021 02:22 WG1735518


4-Methyl-2-pentanone (MIBK) 0.000867 J 0.000478 0.0100 1 09/06/2021 02:22 WG1735518


Naphthalene U 0.00100 0.00500 1 09/06/2021 02:22 WG1735518


Styrene U 0.000118 0.00100 1 09/06/2021 02:22 WG1735518





Toluene 0.000376 J 0.000278 0.00100 1 09/06/2021 02:22 WG1735518



1

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2

Tc

3

Ss

4

Cn

5

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6

Qc

7

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8

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MW-FC o l l e c t e d d a t e / t i m e : 0 8 / 3 1 / 2 1 1 2 : 2 0














(S) Toluene-d8 97.8 80.0-120 09/06/2021 02:22 WG1735518



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QUALITY CONTROL SUMMARYWG1735518V o l a t i l e O r g a n i c C o m p o u n d s ( G C / M S ) b y M e t h o d 8 2 6 0 B L 1 3 9 7 7 6 0 - 0 1 , 0 2 , 0 3

Method Blank (MB)

(MB) R3702172-2 09/05/21 23:20



Acetone U 0.0113 0.0500

Acrolein U 0.00254 0.0500


Benzene U 0.0000941 0.00100



Bromoform U 0.000129 0.00100









Chloroform U 0.000111 0.00500





1,2-Dibromoethane U 0.000126 0.00100




















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Method Blank (MB)

(MB) R3702172-2 09/05/21 23:20





2-Butanone (MEK) U 0.00119 0.0100






Styrene U 0.000118 0.00100




Toluene U 0.000278 0.00100













Xylenes, Total U 0.000174 0.00300

(S) Toluene-d8 98.9 80.0-120




(LCS) R3702172-1 09/05/21 22:39


Analyte mg/l mg/l % %

Acetone 0.0250 0.0265 106 19.0-160

Acrolein 0.0250 0.0357 143 10.0-160

Acrylonitrile 0.0250 0.0250 100 55.0-149

Benzene 0.00500 0.00510 102 70.0-123

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(LCS) R3702172-1 09/05/21 22:39



Bromobenzene 0.00500 0.00456 91.2 73.0-121

Bromodichloromethane 0.00500 0.00526 105 75.0-120

Bromoform 0.00500 0.00472 94.4 68.0-132

Bromomethane 0.00500 0.00201 40.2 10.0-160

n-Butylbenzene 0.00500 0.00388 77.6 73.0-125

sec-Butylbenzene 0.00500 0.00433 86.6 75.0-125

tert-Butylbenzene 0.00500 0.00422 84.4 76.0-124

Carbon tetrachloride 0.00500 0.00499 99.8 68.0-126

Chlorobenzene 0.00500 0.00462 92.4 80.0-121

Chlorodibromomethane 0.00500 0.00437 87.4 77.0-125

Chloroethane 0.00500 0.00500 100 47.0-150

Chloroform 0.00500 0.00513 103 73.0-120

Chloromethane 0.00500 0.00357 71.4 41.0-142

2-Chlorotoluene 0.00500 0.00440 88.0 76.0-123

4-Chlorotoluene 0.00500 0.00434 86.8 75.0-122

1,2-Dibromo-3-Chloropropane 0.00500 0.00400 80.0 58.0-134

1,2-Dibromoethane 0.00500 0.00431 86.2 80.0-122

Dibromomethane 0.00500 0.00476 95.2 80.0-120

1,2-Dichlorobenzene 0.00500 0.00448 89.6 79.0-121



Dichlorodifluoromethane 0.00500 0.00474 94.8 51.0-149

1,1-Dichloroethane 0.00500 0.00520 104 70.0-126

1,2-Dichloroethane 0.00500 0.00521 104 70.0-128

1,1-Dichloroethene 0.00500 0.00459 91.8 71.0-124

cis-1,2-Dichloroethene 0.00500 0.00494 98.8 73.0-120

trans-1,2-Dichloroethene 0.00500 0.00495 99.0 73.0-120


1,1-Dichloropropene 0.00500 0.00478 95.6 74.0-126

1,3-Dichloropropane 0.00500 0.00487 97.4 80.0-120

cis-1,3-Dichloropropene 0.00500 0.00470 94.0 80.0-123

trans-1,3-Dichloropropene 0.00500 0.00449 89.8 78.0-124

2,2-Dichloropropane 0.00500 0.00437 87.4 58.0-130

Di-isopropyl ether 0.00500 0.00517 103 58.0-138

Ethylbenzene 0.00500 0.00453 90.6 79.0-123

Hexachloro-1,3-butadiene 0.00500 0.00402 80.4 54.0-138

Isopropylbenzene 0.00500 0.00447 89.4 76.0-127

p-Isopropyltoluene 0.00500 0.00419 83.8 76.0-125

2-Butanone (MEK) 0.0250 0.0263 105 44.0-160

Methylene Chloride 0.00500 0.00479 95.8 67.0-120

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9

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(LCS) R3702172-1 09/05/21 22:39



4-Methyl-2-pentanone (MIBK) 0.0250 0.0259 104 68.0-142

Methyl tert-butyl ether 0.00500 0.00481 96.2 68.0-125

Naphthalene 0.00500 0.00353 70.6 54.0-135

n-Propylbenzene 0.00500 0.00436 87.2 77.0-124

Styrene 0.00500 0.00415 83.0 73.0-130



Tetrachloroethene 0.00500 0.00494 98.8 72.0-132

Toluene 0.00500 0.00447 89.4 79.0-120

1,1,2-Trichlorotrifluoroethane 0.00500 0.00460 92.0 69.0-132



1,1,1-Trichloroethane 0.00500 0.00480 96.0 73.0-124

1,1,2-Trichloroethane 0.00500 0.00471 94.2 80.0-120

Trichloroethene 0.00500 0.00559 112 78.0-124

Trichlorofluoromethane 0.00500 0.00440 88.0 59.0-147

1,2,3-Trichloropropane 0.00500 0.00438 87.6 73.0-130




Vinyl chloride 0.00500 0.00489 97.8 67.0-131

Xylenes, Total 0.0150 0.0139 92.7 79.0-123

(S) Toluene-d8 97.2 80.0-120



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GLOSSARY OF TERMS







Rec. Recovery.






Dilution




Result












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A2LA – ISO 17025 ⁵ 1461.02 DOD 1461.01

Canada 1461.01 USDA P330-15-00234






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Appendix C CDWR Documentation

GWS-51 NOTICE OF INTENT TO CONSTRUCT MONITORING HOLE(S)9/2016 Please type or print legibly in black or blue ink or file online, [email protected]

State of Colorado, Office of the State Engineer 1313 Sherman St, Room

821, Denver, CO 80203 Phone 303-866-3581 dwr.colorado.gov

Well Owner Name(s): ___________________________________

Address: ______________________________________________

Phone: ______________________________________________________

Email: ____________________________________________________

Landowner’s Name: ___________________________________________

Please check one and complete as indicated including contact info:

Water Well Driller Licensed in Colorado – Lic. No. _________________

Professional Engineer Registered in Colorado – Reg. No. ___________

Professional Geologist per C.R.S. 23-41-208(b)

Other — anyone directly employed by or under the supervision of a licensed

driller, registered professional engineer or professional geologist

Contact / Company ____________________________________________

Address _____________________________________________________

City, State & Zip _______________________________________________

Phone ______________________________________________________

Email ______________________________________________________

Print Name:________________________________________________

Signature or enter full name here: _____________________________

Location: Section __________

Township N S, Range E W, PM

County: __________________________________________

Subdivision: _______________________________________ Lot: _______ Block: ________ Filing: __________________

Site/Property Address _______________________________

__________________________________________________

GPS Location in UTM format if known:

Set GPS unit to true north, datum NAD83, and use meters for the distance units, Zone 12 or Zone 13.

Easting _________________ Northing __________________

# of Monitoring Holes to be constructed in Section: ______

Estimated Depth _______ Ft., Aquifer _______________

Purpose of Monitoring Hole(s) ___________________

____________________________________________

____________________________________________

Anticipated Date of Construction: __________________

Date Notice Submitted: ___________________________

(Must be at least 3 days prior to construction)

ACKNOWLEDGEMENT FROM STATE ENGINEER'S OFFICE FOR OFFICE USE ONLY

_____________________________________________ - MH PROCESSED BY __________________________________

DIV. WD BAS MD DATE ACKNOWLEDGED _______________________________

CONDITIONS OF MONITORING HOLE ACKNOWLEDGEMENT

A COPY OF THE WRITTEN NOTICE OR ACKNOWLEDGEMENT SHALL BE AVAILABLE AT THE DRILLING SITE.

1) Notice was provided to the State Engineer at least 72 hours prior to construction of monitoring & observation hole(s).

2) Construction of the hole(s) must be completed within 90 days of the date notice was given to the State Engineer. Testing and/or pumping shall not exceed a total of 200 hours unless prior written approval is obtained from the State Engineer. Water diverted during testing must not be used for beneficial purposes. The owner of the hole(s) is responsible for obtaining permit(s) and complying with all

rules and regulations pertaining to the discharge of fluids produced during testing.

3) All work must comply with the Water Well Construction Rules, 2 CCR 402-2. Standard permit application and work report forms are found on the DWR website at dwr.colorado.gov. Well Construction and Yield Estimate Reports (GWS-31) must be completed for each

hole drilled. The licensed contractor or authorized individual must submit the completed forms to this office within 60 days of monitoring

hole completion. Aquifer testing information must be submitted on Well Yield Test Report (GWS-39).

4) Unless a well permit is obtained or variance approved, the hole(s) must be plugged and sealed within eighteen (18) months after construction. An Abandonment Report (GWS-09) must be submitted within 60 days of plugging & sealing. The above MH acknowledgement number, owner's structure name, and owner's name and address must be provided on all well permit application(s),

well construction and abandonment reports.

5) A MONITORING HOLE CANNOT BE CONVERTED TO A PRODUCTION WATER WELL, except for purposes of remediation (recovery) or as a permanent dewatering system, if constructed in accordance with the Water Well Construction Rules and policies of the State Engineer.

6) IF HOLES WILL NOT BE CONSTRUCTED UNDER THIS NOTICE WITHIN 90 DAYS, PLEASE WRITE “NO HOLES CONSTRUCTED” ON A COPY

OF THE ACKNOWLEDGED NOTICE WITH THE FILE NUMBER AND EMAIL TO THE DIVISION OF WATER RESOURCES AT

[email protected].

THIS ACKNOWLEDGEMENT OF NOTICE DOES NOT INDICATE THAT WELL PERMIT(S) CAN BE APPROVED.

23City of Thornton - EcoDevo9500 Civic Center Drive, Thornton, CO 80229

(303) [email protected]

Thornton LLC

✔

Jack Denman, ERO Resources Corp

1842 Clarkson St

Denver, CO 80218

(303) 830-1188

[email protected]

Jack Denman

Jack Denman

2 68■ 6Adams

■

8800 Washington StreetThornton, CO

5

25 Surface

Monitor GW quality

07/08/2021

07/02/2021

02/2017

Incomplete forms or Notice provided less than 72 hours prior to well construction will not be acknowledged

RCVD DWR07/02/2021

622031 2 07/05/2021

GWS-51 NOTICE OF INTENT TO CONSTRUCT MONITORING HOLE(S)9/2016 Please type or print legibly in black or blue ink or file online, [email protected]

State of Colorado, Office of the State Engineer 1313 Sherman St, Room

821, Denver, CO 80203 Phone 303-866-3581 dwr.colorado.gov

Well Owner Name(s): ___________________________________

Address: ______________________________________________

Phone: ______________________________________________________

Email: ____________________________________________________

Landowner’s Name: ___________________________________________

Please check one and complete as indicated including contact info:

Water Well Driller Licensed in Colorado – Lic. No. _________________

Professional Engineer Registered in Colorado – Reg. No. ___________

Professional Geologist per C.R.S. 23-41-208(b)

Other — anyone directly employed by or under the supervision of a licensed

driller, registered professional engineer or professional geologist

Contact / Company ____________________________________________

Address _____________________________________________________

City, State & Zip _______________________________________________

Phone ______________________________________________________

Email ______________________________________________________

Print Name:________________________________________________

Signature or enter full name here: _____________________________

Location: Section __________

Township N S, Range E W, PM

County: __________________________________________

Subdivision: _______________________________________ Lot: _______ Block: ________ Filing: __________________

Site/Property Address _______________________________

__________________________________________________

GPS Location in UTM format if known:

Set GPS unit to true north, datum NAD83, and use meters for the distance units, Zone 12 or Zone 13.

Easting _________________ Northing __________________

# of Monitoring Holes to be constructed in Section: ______

Estimated Depth _______ Ft., Aquifer _______________

Purpose of Monitoring Hole(s) ___________________

____________________________________________

____________________________________________

Anticipated Date of Construction: __________________

Date Notice Submitted: ___________________________

(Must be at least 3 days prior to construction)

ACKNOWLEDGEMENT FROM STATE ENGINEER'S OFFICE FOR OFFICE USE ONLY

_____________________________________________ - MH PROCESSED BY __________________________________

DIV. WD BAS MD DATE ACKNOWLEDGED _______________________________

CONDITIONS OF MONITORING HOLE ACKNOWLEDGEMENT

A COPY OF THE WRITTEN NOTICE OR ACKNOWLEDGEMENT SHALL BE AVAILABLE AT THE DRILLING SITE.

1) Notice was provided to the State Engineer at least 72 hours prior to construction of monitoring & observation hole(s).

2) Construction of the hole(s) must be completed within 90 days of the date notice was given to the State Engineer. Testing and/or pumping shall not exceed a total of 200 hours unless prior written approval is obtained from the State Engineer. Water diverted during testing must not be used for beneficial purposes. The owner of the hole(s) is responsible for obtaining permit(s) and complying with all

rules and regulations pertaining to the discharge of fluids produced during testing.

3) All work must comply with the Water Well Construction Rules, 2 CCR 402-2. Standard permit application and work report forms are found on the DWR website at dwr.colorado.gov. Well Construction and Yield Estimate Reports (GWS-31) must be completed for each

hole drilled. The licensed contractor or authorized individual must submit the completed forms to this office within 60 days of monitoring

hole completion. Aquifer testing information must be submitted on Well Yield Test Report (GWS-39).

4) Unless a well permit is obtained or variance approved, the hole(s) must be plugged and sealed within eighteen (18) months after construction. An Abandonment Report (GWS-09) must be submitted within 60 days of plugging & sealing. The above MH acknowledgement number, owner's structure name, and owner's name and address must be provided on all well permit application(s),

well construction and abandonment reports.

5) A MONITORING HOLE CANNOT BE CONVERTED TO A PRODUCTION WATER WELL, except for purposes of remediation (recovery) or as a permanent dewatering system, if constructed in accordance with the Water Well Construction Rules and policies of the State Engineer.

6) IF HOLES WILL NOT BE CONSTRUCTED UNDER THIS NOTICE WITHIN 90 DAYS, PLEASE WRITE “NO HOLES CONSTRUCTED” ON A COPY

OF THE ACKNOWLEDGED NOTICE WITH THE FILE NUMBER AND EMAIL TO THE DIVISION OF WATER RESOURCES AT

[email protected].

THIS ACKNOWLEDGEMENT OF NOTICE DOES NOT INDICATE THAT WELL PERMIT(S) CAN BE APPROVED.

23City of Thornton - EcoDevo9500 Civic Center Drive, Thornton, CO 80229

(303) [email protected]

Thornton LLC

✔

Jack Denman, ERO Resources Corp

1842 Clarkson St

Denver, CO 80218

(303) 830-1188

[email protected]

Jack Denman

Jack Denman

2 68■ 6Adams

■

8800 Washington StreetThornton, CO

4

25 Surface

Monitor GW quality

09/01/2021

08/23/2021

02/2017

Incomplete forms or Notice provided less than 72 hours prior to well construction will not be acknowledged

RCVD DWR08/23/2021

624071 2 08/24/2021

Form No. GWS-31

/201

7. Ground Surface Elevation: feet

9. Advance Notification: Was Notification Required Prior to Construction? Yes No, Date Notification Given: ______________10. Aquifer Type: Type I (One Confining Layer) Type I (Multiple Confining Layers) Laramie-Fox Hills

(Check one) Type II (Not overlain by Type III) Type II (Overlain by Type III) Type III (alluvial/colluvial)

Depth Grain Size Water Loc.

13. Plain CasingOD (in) Kind From (ft) To (ft)

Perforated CasingOD (in) Kind From (ft) To (ft)

14. Filter Pack: 15. Packer Placement: Material Type Size Interval __________ Depth _________16. Grouting Record

Material Amount Density IntervalRemarks:

18. Well Yield Estimate Data: Well Yield Estimate Method: _______________________________________________

Estimated gpm

Estimate Length (hrs) ___________

Remarks:

Static Level: ________________________________

______________________________________________________

_____________________________________________________

Type Color

6. Legal Well Location: 1/4, 1/4, Sec., Twp. , N or S , Range , E or W , P.M.

: Subdivision: , Lot , Block , Filing (Unit) _______

11. Geologic Log: 12. Hole Diameter (in.) From (ft) To (ft)

WELL CONSTRUCTION AND YIELD ESTIMATE REPORTState of Colorado, Office of the State Engineer

1313 Sherman St., Room 821, Denver, CO 80203 303.866.3581and [email protected]

1. Well Permit Number: Receipt Number:2. Owner's Well Designation:

4. Well Location Street Address:5. As Built GPS Well Location (required): Zone 12 Zone 13 Easting: Northing:

Drilling Method: __________________________Date Completed: _____________

19. I have read the statements made herein and know the contents thereof, and they are true to my knowledge. This document is signed (or name entered iffiling online) and certified in accordance with Rule 17.4 of the Water Well Construction Rules, 2 CCR 402 2. The filing of a document that contains false statements is a violation of section 37 91 108(1)(e), C.R.S., and is punishable by fines up to $1,000 and/or revocation of the contracting license. If filing online the State Engineer considers the entry of the licensed contractor’s name to be compliance with Rule 17.4.

Date/Time measured: ________________________

Sign (or enter name if filing online) Print Name and Title Date:

3. Well Owner Name:

For Office Use Only

8. Completed Aquifer Name : Total Depth: feet Depth Completed: feet

Wall Size (in)

Wall Size (in)

Mailing Address:

Phone w/area code: License Number:

17. Disinfection: Type Amt. Used

Company Name: Email:

Check box if Test Data is submitted on Form Number GWS-39, Well Yield Test Report

Screen Slot Size (in): _______

MH-62203TMW-A

City of Thornton- EcoDev8800 Washington Street, Thornton, CO 80229

■

SW SW502015.8 4411842.7

Adams23 2 ■ 68 6■

5302.57 07/08/2021 Hollow Stem AugerAlluvial 25 25

■ 07/02/2021

0-0.33 Asphalt Gravel Black0.33-1.5 Clay Clay Olive Brown

■

1.5-8.5 Claystone Sand Olive Brown8.5-12.5 Sandstone Sand Tan12.5-23 Claystone Clay Olive Brown 13.8223-25 Sandstone Sand Tan/Brown

0.010

8.25 0 25

2 PVC 2 0.75 10

2 PVC 0.15 10 25

Sand

10-208-25

Bentonite 1-8 Direct

Cement 0-1 Direct

13.829/29/2021

ERO Resources Corporatio [email protected] (303) 830-1188

1842 Clarkson Street, Denver, CO 80218

Jack Denman Jack Denman, Geologist/Principal 11/15/2021

Form No. GWS-31

/201










Estimated gpm


Remarks:

Static Level: ________________________________

______________________________________________________

_____________________________________________________

Type Color












3. Well Owner Name:

For Office Use Only


Wall Size (in)

Wall Size (in)

Mailing Address:






MH-62203TMW-B


■

SW SW502046.6 4411943.9

Adams23 2 ■ 68 6■


■ 07/02/2021

0-0.33 Asphalt Gravel Black0.33-1 Clay Sand Brown

■

1-2 Sand Sand Brown2-7 Sandstone Sand Tan7-20 Claystone Sand Olive Brown 10.1720-25 Sandstone Sand Brown

0.010

8.25 0 25

2 PVC 2 0.75 10

2 PVC 0.15 10 25

Sand

10-208-25


Cement 0-1 Direct

10.179/29/2021

ERO Resources Corporation [email protected] (303) 830-1188


Jack Denman Geologist/Principal 11/15/2021

Form No. GWS-31

/201










Estimated gpm


Remarks:

Static Level: ________________________________

______________________________________________________

_____________________________________________________

Type Color












3. Well Owner Name:

For Office Use Only


Wall Size (in)

Wall Size (in)

Mailing Address:






MH-62203TMW-C


■

SW SW502065.6 4411944.0

Adams23 2 ■ 68 6■


07/02/2021

0-0.33 Asphalt Gravel Black0.33-6 Clay Sand Olive Brown

■

6-11 Sand Sand Tan/Brown 10.2311-16 Clay Sand Light Brown

16-17.5 Claystone Sand Brown17.5-25 Sandstone Sand Brown

0.010

8.25 0 25

2 PVC 2 0.75 10

2 PVC 0.15 10 25

Sand

10-208-25


Cement 0-1 Direct

10.239/29/2021



Jack Denman Jack Denman, Geologist/Prinicpal 11/15/2021

Form No. GWS-31

/201










Estimated gpm


Remarks:

Static Level: ________________________________

______________________________________________________

_____________________________________________________

Type Color












3. Well Owner Name:

For Office Use Only


Wall Size (in)

Wall Size (in)

Mailing Address:






MH-62203TMW-D


■

SW SW502144.0 4411965.6

Adams23 2 ■ 68 6■


■ 07/02/2021

0-0.33 Asphalt Gravel Black0.33-1 Sand/Gravel Gravel Gray/Black

■

1-9.5 Clay Sand Olive Brown 8.939.5-12.5 Sand Sand Tan/Brown12.5-24 Claystone Sand Olive Brown24-24.5 Sand Sand Tan24.5-25 Claystone Sand Olive Brown

0.010

8.25 0 25

2 PVC 2 0.75 10

2 PVC 0.15 10 25

Sand

10-208-25


Cement 0-1 Direct

8.939/29/2021




Form No. GWS-31

/201










Estimated gpm


Remarks:

Static Level: ________________________________

______________________________________________________

_____________________________________________________

Type Color












3. Well Owner Name:

For Office Use Only


Wall Size (in)

Wall Size (in)

Mailing Address:






MH-62407TMW-E


■

SW SW502063.2 4411977.9

Adams23 2 ■ 68 6■


■ 08/23/2021

0-0.33 Asphalt Gravel Black0.33-6 Sand Sand Olive Brown

■

6-7.5 Sandstone Sand Olive Brown7.5-19.5 Claystone Clay Olive Brown 8.0219.5-25 Sandstone Sand Olive Brown

0.010

8.25 0 25

2 PVC 2 0.75 15

2 PVC 0.15 15 25

Sand

10-2013-25


Cement 0-1 Direct

8.029/29/2021




Form No. GWS-31

/201










Estimated gpm


Remarks:

Static Level: ________________________________

______________________________________________________

_____________________________________________________

Type Color












3. Well Owner Name:

For Office Use Only


Wall Size (in)

Wall Size (in)

Mailing Address:






MH-62407TMW-F


■

SW SW502144.0 4411984.1

Adams23 2 ■ 68 6■


■ 08/23/2021

0-0.25 Asphalt Gravel Black0.25-8.5 Clay Clay Brown

■

8.5-12.5 Sand Sand Brown 8.7212.5-15.5 Claystone Clay Olive Brown15.5-17 Sandstone Sand Olive Brown17-25 Claystone Sand Olive Gray

0.010

8.25 0 24

2 PVC 2 0.75 14

2 PVC 0.15 14 24

Sand

10-2011.5-24

Bentonite 1-11.5 Direct

Cement 0-1 Direct

8.729/29/2021




Form No. GWS-31

/201










Estimated gpm


Remarks:

Static Level: ________________________________

______________________________________________________

_____________________________________________________

Type Color












3. Well Owner Name:

For Office Use Only


Wall Size (in)

Wall Size (in)

Mailing Address:






MH-62407TMW-G


■

SW SW502077.5 4411968.6

Adams23 2 ■ 68 6■


■ 08/23/2021

0-0.33 Asphalt Gravel Black0.33-2 Clay Clay Olive Brown

■

2-10.5 Sand Sand Tan/Brown 8.5910.5-14.5 Sandy clay Sand Olive Gray14.5-18.5 Claystone Clay Olive Gray18.5-25 Sandstone Sand Olive grey

0.010

8.25 0 25

2 PVC 2 0.75 15

2 PVC 0.15 15 25

Sand

10-2013-25


Cement 0-1 Direct

8.599/29/2021






Appendix D Survey Documentation

Flatirons, Inc.Land Surveying Serviceswww.FlatironsInc.com

Well# X Y Z LAT LONG Description

TMW-A 3146985.93 1191049.31 5303.24 N039° 51' 23.8139" W104° 58' 35.1682" Top Center of Lid

3146985.86 1191049.81 5303.03 N039° 51' 23.8188" W104° 58' 35.1691" Asphalt

3146985.97 1191049.33 5302.62 N039° 51' 23.8141" W104° 58' 35.1678" Top of Casing North Side

TMW-B 3147075.45 1191384.45 5302.60 N039° 51' 27.1198" W104° 58' 33.9953" Top Center of Lid

3147075.64 1191385.04 5302.57 N039° 51' 27.1256" W104° 58' 33.9928" Asphalt


TMW-C 3147144.85 1191383.40 5302.25 N039° 51' 27.1054" W104° 58' 33.1057" Top Center of Lid

3147145.01 1191383.98 5302.25 N039° 51' 27.1111" W104° 58' 33.1036" Asphalt


TMW-D 3147400.29 1191464.21 5299.03 N039° 51' 27.8888" W104° 58' 29.8249" Top Center of Lid

3147400.25 1191465.24 5298.95 N039° 51' 27.8990" W104° 58' 29.8254" Asphalt


TMW-E 3147133.33 1191499.85 5300.34 N039° 51' 28.2566" W104° 58' 33.2446" Top Center of Lid

3147133.51 1191500.63 5300.33 N039° 51' 28.2643" W104° 58' 33.2422" Asphalt


TMW-F 3147401.52 1191511.32 5298.31 N039° 51' 28.3542" W104° 58' 29.8055" Top Center of Lid

3147401.52 1191512.29 5298.25 N039° 51' 28.3638" W104° 58' 29.8055" Asphalt


TMW-G 3147181.69 1191463.37 5300.70 N039° 51' 27.8933" W104° 58' 32.6274" Top Center of Lid

3147181.85 1191464.23 5300.67 N039° 51' 27.9018" W104° 58' 32.6253" Asphalt


TVP-A 3146986.77 1191055.34 5303.16 N039° 51' 23.8734" W104° 58' 35.1571" Top Center of Lid

3146986.77 1191055.57 5303.14 N039° 51' 23.8757" W104° 58' 35.1571" Asphalt

TVP-B 3147075.35 1191378.21 5302.83 N039° 51' 27.0581" W104° 58' 33.9970" Top Center of Lid

3147075.43 1191378.65 5302.86 N039° 51' 27.0625" W104° 58' 33.9960" Asphalt

TVP-C 3147152.98 1191383.43 5302.26 N039° 51' 27.1052" W104° 58' 33.0014" Top Center of Lid

3147153.00 1191383.72 5302.24 N039° 51' 27.1080" W104° 58' 33.0012" Asphalt

TVP-D 3147209.48 1191378.38 5302.26 N039° 51' 27.0520" W104° 58' 32.2776" Top Center of Lid

3147209.31 1191378.96 5302.29 N039° 51' 27.0577" W104° 58' 32.2797" Asphalt

TVP-E 3147275.79 1191462.85 5299.93 N039° 51' 27.8827" W104° 58' 31.4210" Top Center of Lid

3147275.74 1191463.21 5299.87 N039° 51' 27.8862" W104° 58' 31.4217" Asphalt

TVP-F 3147373.62 1191464.46 5299.59 N039° 51' 27.8929" W104° 58' 30.1668" Top Center of Lid

3147373.61 1191464.91 5299.49 N039° 51' 27.8973" W104° 58' 30.1669" Asphalt

MW-01 3147275.48 1191473.23 5299.66 N039° 51' 27.9852" W104° 58' 31.4243" Top Center of Lid

3147275.48 1191473.81 5299.70 N039° 51' 27.9910" W104° 58' 31.4242" Asphalt



3147379.42 1191465.74 5299.33 N039° 51' 27.9051" W104° 58' 30.0923" Asphalt



3147210.91 1191384.77 5302.06 N039° 51' 27.1151" W104° 58' 32.2588" Asphalt



3146987.97 1191129.17 5303.34 N039° 51' 24.6027" W104° 58' 35.1361" Asphalt



3146992.28 1191395.16 5302.20 N039° 51' 27.2305" W104° 58' 35.0607" Asphalt


19588PRO F ESS I ONA L L A ND S URV EYOR

C OL O R A D O L I C E N S E D

EDGA

R THOMAS BRISTOW

Documents

Phase II Limited Site Investigation 8800 Washington Street