DERR-2024-012781

Former Grand Western Gas & Groceries GW Monitoring Rpt. Page 1
Atlas

November 20, 2024

Ms. Eileen Brennan
Utah Department of Environmental Quality
Division of Environmental Response and Remediation
195 North 1950 West
Salt Lake City, Utah 84114-4840

SUBJECT: Groundwater Monitoring Report – October 2024
Former Grand Western Gas & Groceries
575 South Main Street
Richfield, Utah
Facility ID #2000288
UST Release Site FLU
Work Assignment FLU-17
UDEQ Technical Services Contract #116151

Dear Ms. Brennan:

Please find attached a copy of the October 2024 Groundwater Monitoring Report for the above
referenced site.

INTRODUCTION

On October 10 and 11, 2024, Atlas Technical Consultants (Atlas) conducted a groundwater
monitoring event at the Former Grand Western Gas & Groceries site located at 575 South Main
Street, Richfield, Utah (see Figure 1). The work was performed on behalf of the Utah
Department Environmental Quality, Division of Environmental Response and Remediation
(DERR), under Work Assignment FLU-17.

FIELD PARAMETER WELL PURGING PROCEDURES AND CHEMICAL ANALYSIS

The approved work plan included sampling monitoring wells MW -10 through MW -17. However,
MW -17 was destroyed during the demolition of the Motel 6 building. A site map depicting the
groundwater monitoring well locations and surrounding area features is presented as Figure 1.
Prior to well purging, groundwater depths were measured in each well using an electronic water
level/free product interface probe. The water level/free product interface probe was
decontaminated between each well with an Alconox detergent wash and tap water rinse. None
of the wells were found to contain free product.

Following field parameter measurements, the monitoring wells were purged using new, factory-
sealed disposable PVC bailers. All of the monitoring wells sampled were purged until dry.
Groundwater removed from the wells was poured on the asphalt surface and allowed to
evaporate.
358 South 700 East, B518
Salt Lake City UT 84102
Office: 801.935.4917
www.oneatlas.com

Former Grand Western Gas & Groceries GW Monitoring Rpt. Page 2
Atlas

After the purging process, the wells were allowed to recharge to within 95 percent of the pre-
purge water level before groundwater samples were collected. The samples were transferred to
appropriate containers and immediately placed on ice in an insulated cooler and then
transported under chain-of-custody documentation to a Utah-certified laboratory for analysis.
The groundwater samples were analyzed for total petroleum hydrocarbons as gasoline (TPH-
GRO) and TPH as diesel (TPH-DRO) using EPA Method 8015, and for methyl t-butyl ether,
benzene, toluene, ethyl benzene, total xylenes, and naphthalene (MBTEXN) using EPA Method
8260. A laboratory prepared trip blank was included in the cooler and submitted for laboratory
analysis. The laboratory report and the chain of custody are presented in Appendix A.

Field parameter measurements and groundwater laboratory results are presented in Table 1.
The October 2024 groundwater elevation data were utilized to prepare a groundwater contour
map (Figure 2) for the site. The groundwater gradient appears to be toward the south, southeast
with a gradient of approximately 0.017 feet/foot measured between MW -10 and MW -16.

The laboratory results for the samples collected from the on-site monitoring wells in October
2024 indicated no detection of constituents above their respective Tier I Screening Levels.
Benzene, ethylbenzene, and xylenes, were detected in MW -11 at concentrations of 0.000416
mg/L, 0.000190 mg/L, and 0.000251 mg/L, respectively. Historically benzene had been
measured above the Tier I Screening Level in MW -11. Methyl t-butyl ether (MTBE) was
detected in MW-13 (0.000658 mg/L). No other MBTEXN constituents were detected above the
laboratory detection limits. The laboratory data collected from the off-site wells indicate no
detection of petroleum hydrocarbon constituents above their respective Initial Screening Levels
(ISLs). MTBE was detected in MW-16 (0.000186 mg/L). The benzene isoconcentration map is
presented as Figure 3.

The laboratory results indicated no detection of TPH-GRO or TPH-DRO above the Tier I
Screening Level of 10 mg/L in any of the on-site wells sampled. TPH-GRO was detected in all of
the on-site wells between 0.0426 mg/L (MW -10) and 0.423 mg/L (MW-11). TPH-DRO was
detected in all the on-site wells between 0.0893 mg/L (MW -13) and 1.620 mg/L (MW -11).
Review of the off-site groundwater data indicate no detection of TPH-GRO or TPH-DRO above
the ISL of 1.0 mg/L.TPH-GRO was detected in off-site well MW-16 at 0.301 mg/L, and TPH-
DRO was in MW -16 at 0.0568 mg/L. The TPH-DRO isoconcentration map is presented as
Figure 4.

CONCLUSIONS AND RECOMMENDATIONS

The data collected during the October 2024 groundwater monitoring event indicate no detection
of petroleum constituents above their respective Tier I Screening Levels in the on-site wells, or
above ISLs in the off-site wells. Based upon review of the October 2024 groundwater data and
the historical groundwater data, Atlas recommends the UDEQ consider this site for closure.

Our services consist of professional opinions and recommendations made in accordance with
generally accepted geotechnical and environmental engineering principles and practices. This
warranty is in lieu of all other warranties either expressed or implied. Should you have any
questions, please do not hesitate to call us at [phone].

Former Grand Western Gas & Groceries GW Monitoring Rpt. Page 3
Atlas

Sincerely,

Atlas Technical Consultants LLC

Olaf Questereit James J. Coletta, P.G.
Staff Scientist Branch Manager
GS #1326 Utah Certified PST Consultant
PST CC #0150

FIGURES

FI
G
U
R
E

1
FI
G
U
R
E

2
FI
G
U
R
E

3
FI
G
U
R
E

4

TABLES

Page 1 of 2
Sample
TOC Benzene Ethyl
Benzene MTBE Naph-
thalene Toluene Total
Xylenes TPH-GRO TPH-DRO
Initial Screening Levels (ISLs)0.005 1 0.2 0.7 1 10 1 1
RBCA Tier 1 Screening Levels 0.3 4 0.2 0.7 3 10 10 10
SB-1 07/01/14 NA NA NA NA NA NA NA <1 X,M,F NM NM
SB-4 07/01/14 0.084 0.25 <0.01 <0.05 <0.01 0.63 0.340 F <1 X,M,F NM NM
SB-6 07/01/14 <0.001 <0.001 <0.001 <0.005 <0.001 <0.003 <0.05 F <1 X,M,F NM NM
SB-9 07/01/14 <0.001 <0.001 <0.001 <0.005 <0.001 <0.003 0.260 F <1 X,M,F NM NM
SB-10 07/01/14 <0.001 <0.001 0.022 <0.005 <0.001 <0.003 <0.05 F <1 X,M,F NM NM
SB-12 07/02/14 <0.005 <0.005 <0.005 <0.025 <0.005 <0.015 <0.05 F <1 X,M,F,UJ NM NM
SB-13 07/02/14 <0.001 <0.001 <0.001 <0.005 <0.001 <0.003 <0.05 F <1 X,M,F NM NM
SB-14 07/02/14 <0.001 <0.001 <0.001 <0.005 <0.001 <0.003 <0.05 F <1 X,M,F,UJ NM NM
SB-16 07/02/14 <0.001 <0.001 0.0029 <0.005 <0.001 <0.003 <0.05 F <1 X,M,F NM NM
SB-2/MW-10
99.60 07/09/14 <0.001 <0.001 <0.001 <0.002 <0.001 <0.003 <0.05 F <1 X,M,F 7.35 92.21
99.56 12/09/14 <0.001 <0.001 <0.001 <0.002 <0.001 <0.003 <0.05 F <1 X,M,F 8.24 91.32
03/11/15 <0.001 <0.001 <0.001 <0.002 <0.001 <0.003 <0.05 F <1 X,M,F 8.20 91.36
06/17/15 <0.001 <0.001 <0.001 <0.002 <0.001 <0.003 <0.05 F <1 X,M,F 6.63 92.93
09/15/15 <0.002 <0.005 <0.005 <0.005 <0.005 <0.005 <0.050 <1 7.85 91.71
09/15/15**<0.002 <0.005 <0.005 <0.005 <0.005 <0.005 <0.050 <1 ----
10/11/24 <0.00100 <0.00100 <0.00100 <0.00500 <0.00100 <0.00300 0.0426 B,J 0.153 10.08 89.48

SB-3/MW-11
98.78 07/09/14 0.479 0.307 <0.001 0.011 0.085 1.08 3.83 F <1 X,M,F 8.34 90.52
98.86 12/09/14 0.378 0.260 <0.001 0.055 0.017 0.163 0.340 F <1 X,M,F 7.57 91.29
03/11/15 0.132 0.067 0.001 0.016 0.005 0.033 1.78 F <1 X,M,F 7.68 91.18
3/11/15**0.114 0.070 0.001 0.016 0.005 0.035 1.53 F <1 X,M,F ----
06/17/15 0.481 0.229 <0.005 0.050 0.025 0.272 Jhi 1.36 F <1 X,M,F 6.10 92.76
06/17/15**0.484 0.226 <0.001 0.044 0.027 0.270 Jhi 1.70 F <1 X,M,F ----
09/15/15 0.239 0.053 <0.005 0.005 0.011 0.083 0.959 <1 7.33 91.53
10/11/24 0.000416 J 0.000190 J <0.00100 <0.00500 <0.00100 0.000251 J 0.423 B,J 1.620 9.64 89.22

SB-5/MW-12
98.67 07/09/14 <0.001 <0.001 <0.001 <0.002 <0.001 <0.003 0.138 F <1 X,M,F 6.65 92.09
98.74 12/09/14 <0.001 <0.001 <0.001 <0.002 <0.001 <0.003 <0.05 F <1 X,M,F 7.46 91.28
03/11/15 <0.001 <0.001 <0.001 <0.002 <0.001 <0.003 0.060 F <1 X,M,F 7.52 91.22
06/17/15 <0.001 <0.001 <0.001 <0.002 <0.001 <0.003 0.110 F <1 X,M,F 5.86 92.88
09/15/15 <0.002 <0.005 <0.005 <0.005 <0.005 <0.005 0.052 <1 7.15 91.59
10/11/24 <0.00100 <0.00100 <0.00100 <0.00500 <0.00100 <0.00300 0.0777 B,J 0.319 9.45 89.29

SB-7/MW-13
98.63 07/09/14 0.001 0.025 0.016 0.005 <0.001 0.029 0.277 F <1 X,M,F 7.27 91.78
99.05 12/09/14 <0.001 0.012 0.005 0.004 <0.001 <0.003 0.067 F <1 X,M,F 8.19 90.86
03/11/15 <0.001 <0.001 0.001 <0.002 <0.001 <0.003 <0.05 F <1 X,M,F 8.20 90.85
06/17/15 0.002 0.018 0.006 Jlo 0.007 <0.001 0.003 Jhi <0.05 F <1 X,M,F 6.53 92.10
09/15/15 <0.002 <0.005 0.011 <0.005 <0.005 <0.005 <0.050 <1 7.81 91.24
10/11/24 <0.00100 <0.00100 0.000658 J <0.00500 <0.00100 <0.00300 0.0430 B,J 0.0893 J 10.08 88.97

SB-8/MW-14
100.00 07/09/14 <0.001 0.021 <0.001 0.022 <0.001 0.032 0.347 F <1 X,M,F 8.67 91.33
100.00 12/09/14 <0.001 <0.001 <0.001 <0.002 <0.001 <0.003 <0.05 F <1 X,M,F 9.59 90.41
03/11/15 <0.001 <0.001 <0.001 <0.002 <0.001 <0.003 0.102 F <1 X,M,F 9.64 90.36
06/17/15 0.006 0.009 <0.001 0.002 0.001 0.028 Jhi 0.197 F <1 X,M,F 7.96 92.04
09/15/15 <0.002 <0.005 <0.005 <0.005 <0.005 <0.005 0.065 1.1 9.27 90.73
10/11/24 <0.00100 <0.00100 <0.00100 <0.00500 <0.00100 <0.00300 0.0448 B,J 0.240 11.34 88.66

SB-11/MW-15
NOT SURVEYED 07/09/14 <0.001 <0.001 <0.001 <0.002 <0.001 <0.003 <0.05 F <1 X,M,F 9.23 NM
98.89 12/09/14 <0.001 <0.001 <0.001 <0.002 <0.001 <0.003 <0.05 F <1 X,M,F 8.52 90.37
03/11/15 <0.001 <0.001 <0.001 <0.002 <0.001 <0.003 <0.05 F <1 X,M,F 8.60 90.29
06/17/15 <0.001 0.050 <0.001 0.012 <0.001 0.006 <0.05 F <1 X,M,F 6.78 92.11
09/15/15 <0.002 <0.005 <0.005 <0.005 <0.005 <0.005 <0.050 <1 8.14 90.75
10/11/24 <0.00100 <0.00100 <0.00100 <0.00500 <0.00100 <0.00300 0.437 B,J 0.245 J 10.22 88.67

Former Grand Western Gas and Grocery
Groundwater Analytical Results
WTE (feet)DTW (feet)
TABLE 1
575 South Main Street
Richfield, UT
LUST I.D. FLU
Facility I.D. 2000288
Date
Groundwater Concentrations (mg/L)
Page 2 of 2
Sample
TOC Benzene Ethyl
Benzene MTBE Naph-
thalene Toluene Total
Xylenes TPH-GRO TPH-DRO
Initial Screening Levels (ISLs)0.005 1 0.2 0.7 1 10 1 1
RBCA Tier 1 Screening Levels 0.3 4 0.2 0.7 3 10 10 10
Former Grand Western Gas and Grocery
Groundwater Analytical Results
WTE (feet)DTW (feet)
TABLE 1
575 South Main Street
Richfield, UT
LUST I.D. FLU
Facility I.D. 2000288
Date
Groundwater Concentrations (mg/L)
SB-15/MW-16
95.23 07/09/14 <0.001 <0.001 <0.001 <0.002 <0.001 <0.003 0.671 F <1 X,M,F 5.17 90.60
95.77 12/09/14 <0.001 <0.001 <0.001 <0.002 <0.001 <0.003 0.179 F <1 X,M,F 5.93 89.84
03/11/15 <0.001 <0.001 <0.001 <0.002 <0.001 <0.003 0.487 F <1 X,M,F 6.12 89.65
06/17/15 <0.001 <0.001 <0.001 <0.002 <0.001 <0.003 0.305 F <1 X,M,F 4.36 91.41
09/15/15 <0.002 <0.005 <0.005 <0.005 <0.005 <0.005 0.626 <1 5.79 89.98
10/11/24 <0.00100 <0.00100 0.000186 J <0.00500 <0.00100 <0.00300 0.301 B 0.0568 J 7.94 87.83

SB-17/MW-17 07/09/14 <0.001 <0.001 <0.001 <0.002 <0.001 <0.003 0.834 F <1 X,M,F 5.78 88.87
94.65 07/09/14**<0.001 <0.001 <0.001 <0.002 <0.001 <0.003 1.02 F <1 F,X,M ----
95.25 12/09/14 <0.001 <0.001 <0.001 <0.002 <0.001 <0.003 0.174 F <1 F,X,M 6.34 88.91
12/09/14/**<0.001 <0.001 <0.001 <0.002 <0.001 <0.003 0.201 F <1 F,X,M ----
03/11/15 <0.001 <0.001 <0.001 <0.002 <0.001 <0.003 0.432 F <1 F,X,M 6.63 88.62
06/17/15 <0.001 <0.001 <0.001 <0.002 <0.001 <0.003 0.429 F <1 F,X,M 4.85 90.40
09/15/15 <0.002 <0.005 <0.005 <0.005 <0.005 <0.005 0.784 <1 6.33 88.92
10/11/24 NA NA

M = Micro-extraction used for TPH diesel range organics
mg/l = milligrams per liter UJ = Analyte not detected. Spike or surrogate recovery below limits
F = No dual column confirmation
X = Hexane used for extractions
WTE = Water Table Elevation
TOC = Top of well casing elevation (resurveyed 12/09/14)** = duplicate sample
DTW = Depth to Water
TPH-DRO = Diesel-range total petroleum hydrocarbons
NA = Not Analyzed, VOC containers were broken during sample processing at the laboratory.
Concentrations highlighted in red indicated an exceedence of an ISL at an off-site sample location.
Bolded concentrations indicate an exceedence of Tier I Screening Levels at an on-site sample location.
J = The identificaion of the analyte is acceptable; the reported value is an estimate.
B = The same analyte is found in the associated blank.
MTBE = Methyl Tertiary Butyl Ether
ISLs = Initial Screening Levels
NM = Not Measured
TPH-GRO = Gasoline-range total petroleum hydrocarbons
RBCA = Risk-Based Corrective Action
Notes:
Well was destroyed

APPENDIX A

LABORATORY ANALYTICAL REPORTS
ANALYTICAL REPORT
October 28, 2024
Revised Report
One Atlas
Sample Delivery Group:L1788351
Samples Received:10/12/2024
Project Number:
Description:Grand Western Gas & Grocery
Report To:Jim Coletta
1775 South 4130 West, Ste A
Salt Lake City, UT 84104
Entire Report Reviewed By:
October 28, 2024
[Preliminary Report]
Daphne Richards
Project 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 National
12065 Lebanon Rd Mount Juliet, TN 37122 615-758-5858 800-767-5859 mydata.pacelabs.com
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
One Atlas L1788351 10/28/24 12:00 1 of 20
October 28, 2024
Daphne Richards
Project Manager
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
One Atlas L1788351 10/28/24 12:04 1 of 20
TABLE OF CONTENTS
Cp: Cover Page 1
Tc: Table of Contents 2
Ss: Sample Summary 3
Cn: Case Narrative 5
Sr: Sample Results 6
MW-10 L1788351-01 6
MW-11 L1788351-02 7
MW-12 L1788351-03 8
MW-13 L1788351-04 9
MW-14 L1788351-05 10
MW-15 L1788351-06 11
MW-16 L1788351-07 12
TRIP BLANK L1788351-08 13
Qc: Quality Control Summary 14
Volatile Organic Compounds (GC) by Method 8015D/GRO 14
Volatile Organic Compounds (GC/MS) by Method 8260B 15
Semi-Volatile Organic Compounds (GC) by Method 8015 17
Gl: Glossary of Terms 18
Al: Accreditations & Locations 19
Sc: Sample Chain of Custody 20
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
One Atlas L1788351 10/28/24 12:00 2 of 20
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
One Atlas L1788351 10/28/24 12:04 2 of 20
SAMPLE SUMMARY
Collected by Collected date/time Received date/time
MW-10 L1788351-01 GW Olaf Q.10/11/24 07:00 10/12/24 08:00
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Volatile Organic Compounds (GC) by Method 8015D/GRO WG2385206 1 10/18/24 23:03 10/18/24 23:03 JAH Mt. Juliet, TN
Volatile Organic Compounds (GC/MS) by Method 8260B WG2388268 1 10/24/24 02:49 10/24/24 02:49 AV Mt. Juliet, TN
Semi-Volatile Organic Compounds (GC) by Method 8015 WG2388354 1.11 10/24/24 07:30 10/24/24 21:35 DMG Mt. Juliet, TN
Collected by Collected date/time Received date/time
MW-11 L1788351-02 GW Olaf Q.10/11/24 07:15 10/12/24 08:00
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Volatile Organic Compounds (GC) by Method 8015D/GRO WG2385206 10 10/19/24 04:41 10/19/24 04:41 JAH Mt. Juliet, TN
Volatile Organic Compounds (GC/MS) by Method 8260B WG2384622 1 10/18/24 08:54 10/18/24 08:54 DYW Mt. Juliet, TN
Semi-Volatile Organic Compounds (GC) by Method 8015 WG2388354 5 10/24/24 07:30 10/25/24 03:29 DMG Mt. Juliet, TN
Collected by Collected date/time Received date/time
MW-12 L1788351-03 GW Olaf Q.10/11/24 07:30 10/12/24 08:00
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Volatile Organic Compounds (GC) by Method 8015D/GRO WG2385206 1 10/18/24 23:23 10/18/24 23:23 JAH Mt. Juliet, TN
Volatile Organic Compounds (GC/MS) by Method 8260B WG2384622 1 10/18/24 09:15 10/18/24 09:15 DYW Mt. Juliet, TN
Semi-Volatile Organic Compounds (GC) by Method 8015 WG2388354 1 10/24/24 07:30 10/24/24 21:55 DMG Mt. Juliet, TN
Collected by Collected date/time Received date/time
MW-13 L1788351-04 GW Olaf Q.10/11/24 07:45 10/12/24 08:00
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Volatile Organic Compounds (GC) by Method 8015D/GRO WG2385206 1 10/18/24 23:44 10/18/24 23:44 JAH Mt. Juliet, TN
Volatile Organic Compounds (GC/MS) by Method 8260B WG2384622 1 10/18/24 09:36 10/18/24 09:36 DYW Mt. Juliet, TN
Semi-Volatile Organic Compounds (GC) by Method 8015 WG2388354 1 10/24/24 07:30 10/24/24 22:16 DMG Mt. Juliet, TN
Collected by Collected date/time Received date/time
MW-14 L1788351-05 GW Olaf Q.10/11/24 08:00 10/12/24 08:00
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Volatile Organic Compounds (GC) by Method 8015D/GRO WG2385206 1 10/19/24 00:59 10/19/24 00:59 JAH Mt. Juliet, TN
Volatile Organic Compounds (GC/MS) by Method 8260B WG2384622 1 10/18/24 09:56 10/18/24 09:56 DYW Mt. Juliet, TN
Semi-Volatile Organic Compounds (GC) by Method 8015 WG2388354 1 10/24/24 07:30 10/24/24 22:36 DMG Mt. Juliet, TN
Collected by Collected date/time Received date/time
MW-15 L1788351-06 GW Olaf Q.10/11/24 08:15 10/12/24 08:00
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Volatile Organic Compounds (GC) by Method 8015D/GRO WG2385206 10 10/19/24 06:41 10/19/24 06:41 JAH Mt. Juliet, TN
Volatile Organic Compounds (GC/MS) by Method 8260B WG2384622 10 10/18/24 12:09 10/18/24 12:09 DYW Mt. Juliet, TN
Semi-Volatile Organic Compounds (GC) by Method 8015 WG2388354 5 10/24/24 07:30 10/25/24 00:05 DMG Mt. Juliet, TN
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
One Atlas L1788351 10/28/24 12:00 3 of 20
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
One Atlas L1788351 10/28/24 12:04 3 of 20
SAMPLE SUMMARY
Collected by Collected date/time Received date/time
MW-16 L1788351-07 GW Olaf Q.10/11/24 06:45 10/12/24 08:00
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Volatile Organic Compounds (GC) by Method 8015D/GRO WG2385206 1 10/19/24 01:19 10/19/24 01:19 JAH Mt. Juliet, TN
Volatile Organic Compounds (GC/MS) by Method 8260B WG2384622 1 10/18/24 10:24 10/18/24 10:24 DYW Mt. Juliet, TN
Semi-Volatile Organic Compounds (GC) by Method 8015 WG2388354 1 10/24/24 07:30 10/25/24 00:26 DMG Mt. Juliet, TN
Collected by Collected date/time Received date/time
TRIP BLANK L1788351-08 GW Olaf Q.10/11/24 00:00 10/12/24 08:00
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Volatile Organic Compounds (GC/MS) by Method 8260B WG2384622 1 10/18/24 05:45 10/18/24 05:45 DYW Mt. Juliet, TN
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
One Atlas L1788351 10/28/24 12:00 4 of 20
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
One Atlas L1788351 10/28/24 12:04 4 of 20
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 within
the report. Where applicable, all MDL (LOD) and RDL (LOQ) values reported for environmental samples
have 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.
[Preliminary Report]
Daphne Richards
Project Manager
Report Revision History
Level II Report - Version 1: 10/27/24 21:24
Project Narrative
DRO
Sample Delivery Group (SDG) Narrative
pH outside of method requirement.
Lab Sample ID Project Sample ID Method
L1788351-01 MW-10 8015
L1788351-02 MW-11 8015
L1788351-04 MW-13 8015
L1788351-05 MW-14 8015
L1788351-06 MW-15 8015
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
One Atlas L1788351 10/28/24 12:00 5 of 20
Daphne Richards
Project Manager
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
One Atlas L1788351 10/28/24 12:04 5 of 20
SAMPLE RESULTS - 01
L1788351
MW-10
Collected date/time: 10/11/24 07:00
Volatile Organic Compounds (GC) by Method 8015D/GRO
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte ug/l ug/l ug/l date / time
TPH (GC/FID) Low Fraction 42.6 B J 31.4 100 1 10/18/2024 23:03 WG2385206
(S)
a,a,a-Trifluorotoluene(FID)86.8 78.0-120 10/18/2024 23:03 WG2385206
Volatile Organic Compounds (GC/MS) by Method 8260B
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte ug/l ug/l ug/l date / time
Benzene U 0.0941 1.00 1 10/24/2024 02:49 WG2388268
Toluene U 0.278 1.00 1 10/24/2024 02:49 WG2388268
Ethylbenzene U 0.137 1.00 1 10/24/2024 02:49 WG2388268
Total Xylenes U 0.174 3.00 1 10/24/2024 02:49 WG2388268
Methyl tert-butyl ether U 0.101 1.00 1 10/24/2024 02:49 WG2388268
Naphthalene U 1.00 5.00 1 10/24/2024 02:49 WG2388268
(S) Toluene-d8 111 80.0-120 10/24/2024 02:49 WG2388268
(S) 4-Bromofluorobenzene 110 77.0-126 10/24/2024 02:49 WG2388268
(S) 1,2-Dichloroethane-d4 101 70.0-130 10/24/2024 02:49 WG2388268
Semi-Volatile Organic Compounds (GC) by Method 8015
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte ug/l ug/l ug/l date / time
C10-C28 Diesel Range 153 24.6 111 1.11 10/24/2024 21:35 WG2388354
(S) o-Terphenyl 105 52.0-156 10/24/2024 21:35 WG2388354
Sample Narrative:
L1788351-01 WG2388354: Dilution due to matrix impact during extraction procedure
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
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One Atlas L1788351 10/28/24 12:04 6 of 20
SAMPLE RESULTS - 02
L1788351
MW-11
Collected date/time: 10/11/24 07:15
Volatile Organic Compounds (GC) by Method 8015D/GRO
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte ug/l ug/l ug/l date / time
TPH (GC/FID) Low Fraction 423 B J 314 1000 10 10/19/2024 04:41 WG2385206
(S)
a,a,a-Trifluorotoluene(FID)86.8 78.0-120 10/19/2024 04:41 WG2385206
Sample Narrative:
L1788351-02 WG2385206: Lowest possible dilution due to sample foaming.
Volatile Organic Compounds (GC/MS) by Method 8260B
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte ug/l ug/l ug/l date / time
Benzene 0.416 J 0.0941 1.00 1 10/18/2024 08:54 WG2384622
Toluene U 0.278 1.00 1 10/18/2024 08:54 WG2384622
Ethylbenzene 0.190 J 0.137 1.00 1 10/18/2024 08:54 WG2384622
Total Xylenes 0.251 J 0.174 3.00 1 10/18/2024 08:54 WG2384622
Methyl tert-butyl ether U 0.101 1.00 1 10/18/2024 08:54 WG2384622
Naphthalene U 1.00 5.00 1 10/18/2024 08:54 WG2384622
(S) Toluene-d8 112 80.0-120 10/18/2024 08:54 WG2384622
(S) 4-Bromofluorobenzene 104 77.0-126 10/18/2024 08:54 WG2384622
(S) 1,2-Dichloroethane-d4 98.9 70.0-130 10/18/2024 08:54 WG2384622
Semi-Volatile Organic Compounds (GC) by Method 8015
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte ug/l ug/l ug/l date / time
C10-C28 Diesel Range 1620 111 500 5 10/25/2024 03:29 WG2388354
(S) o-Terphenyl 128 52.0-156 10/25/2024 03:29 WG2388354
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
One Atlas L1788351 10/28/24 12:00 7 of 20
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One Atlas L1788351 10/28/24 12:04 7 of 20
SAMPLE RESULTS - 03
L1788351
MW-12
Collected date/time: 10/11/24 07:30
Volatile Organic Compounds (GC) by Method 8015D/GRO
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte ug/l ug/l ug/l date / time
TPH (GC/FID) Low Fraction 77.7 B J 31.4 100 1 10/18/2024 23:23 WG2385206
(S)
a,a,a-Trifluorotoluene(FID)86.5 78.0-120 10/18/2024 23:23 WG2385206
Volatile Organic Compounds (GC/MS) by Method 8260B
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte ug/l ug/l ug/l date / time
Benzene U 0.0941 1.00 1 10/18/2024 09:15 WG2384622
Toluene U 0.278 1.00 1 10/18/2024 09:15 WG2384622
Ethylbenzene U 0.137 1.00 1 10/18/2024 09:15 WG2384622
Total Xylenes U 0.174 3.00 1 10/18/2024 09:15 WG2384622
Methyl tert-butyl ether U 0.101 1.00 1 10/18/2024 09:15 WG2384622
Naphthalene U 1.00 5.00 1 10/18/2024 09:15 WG2384622
(S) Toluene-d8 112 80.0-120 10/18/2024 09:15 WG2384622
(S) 4-Bromofluorobenzene 98.6 77.0-126 10/18/2024 09:15 WG2384622
(S) 1,2-Dichloroethane-d4 98.4 70.0-130 10/18/2024 09:15 WG2384622
Semi-Volatile Organic Compounds (GC) by Method 8015
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte ug/l ug/l ug/l date / time
C10-C28 Diesel Range 319 22.2 100 1 10/24/2024 21:55 WG2388354
(S) o-Terphenyl 113 52.0-156 10/24/2024 21:55 WG2388354
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
One Atlas L1788351 10/28/24 12:00 8 of 20
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One Atlas L1788351 10/28/24 12:04 8 of 20
SAMPLE RESULTS - 04
L1788351
MW-13
Collected date/time: 10/11/24 07:45
Volatile Organic Compounds (GC) by Method 8015D/GRO
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte ug/l ug/l ug/l date / time
TPH (GC/FID) Low Fraction 43.0 B J 31.4 100 1 10/18/2024 23:44 WG2385206
(S)
a,a,a-Trifluorotoluene(FID)86.7 78.0-120 10/18/2024 23:44 WG2385206
Volatile Organic Compounds (GC/MS) by Method 8260B
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte ug/l ug/l ug/l date / time
Benzene U 0.0941 1.00 1 10/18/2024 09:36 WG2384622
Toluene U 0.278 1.00 1 10/18/2024 09:36 WG2384622
Ethylbenzene U 0.137 1.00 1 10/18/2024 09:36 WG2384622
Total Xylenes U 0.174 3.00 1 10/18/2024 09:36 WG2384622
Methyl tert-butyl ether 0.658 J 0.101 1.00 1 10/18/2024 09:36 WG2384622
Naphthalene U 1.00 5.00 1 10/18/2024 09:36 WG2384622
(S) Toluene-d8 111 80.0-120 10/18/2024 09:36 WG2384622
(S) 4-Bromofluorobenzene 98.0 77.0-126 10/18/2024 09:36 WG2384622
(S) 1,2-Dichloroethane-d4 98.8 70.0-130 10/18/2024 09:36 WG2384622
Semi-Volatile Organic Compounds (GC) by Method 8015
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte ug/l ug/l ug/l date / time
C10-C28 Diesel Range 89.3 J 22.2 100 1 10/24/2024 22:16 WG2388354
(S) o-Terphenyl 101 52.0-156 10/24/2024 22:16 WG2388354
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
One Atlas L1788351 10/28/24 12:00 9 of 20
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
One Atlas L1788351 10/28/24 12:04 9 of 20
SAMPLE RESULTS - 05
L1788351
MW-14
Collected date/time: 10/11/24 08:00
Volatile Organic Compounds (GC) by Method 8015D/GRO
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte ug/l ug/l ug/l date / time
TPH (GC/FID) Low Fraction 44.8 B J 31.4 100 1 10/19/2024 00:59 WG2385206
(S)
a,a,a-Trifluorotoluene(FID)86.1 78.0-120 10/19/2024 00:59 WG2385206
Volatile Organic Compounds (GC/MS) by Method 8260B
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte ug/l ug/l ug/l date / time
Benzene U 0.0941 1.00 1 10/18/2024 09:56 WG2384622
Toluene U 0.278 1.00 1 10/18/2024 09:56 WG2384622
Ethylbenzene U 0.137 1.00 1 10/18/2024 09:56 WG2384622
Total Xylenes U 0.174 3.00 1 10/18/2024 09:56 WG2384622
Methyl tert-butyl ether U 0.101 1.00 1 10/18/2024 09:56 WG2384622
Naphthalene U 1.00 5.00 1 10/18/2024 09:56 WG2384622
(S) Toluene-d8 112 80.0-120 10/18/2024 09:56 WG2384622
(S) 4-Bromofluorobenzene 95.4 77.0-126 10/18/2024 09:56 WG2384622
(S) 1,2-Dichloroethane-d4 99.4 70.0-130 10/18/2024 09:56 WG2384622
Semi-Volatile Organic Compounds (GC) by Method 8015
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte ug/l ug/l ug/l date / time
C10-C28 Diesel Range 240 22.2 100 1 10/24/2024 22:36 WG2388354
(S) o-Terphenyl 108 52.0-156 10/24/2024 22:36 WG2388354
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
One Atlas L1788351 10/28/24 12:00 10 of 20
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One Atlas L1788351 10/28/24 12:04 10 of 20
SAMPLE RESULTS - 06
L1788351
MW-15
Collected date/time: 10/11/24 08:15
Volatile Organic Compounds (GC) by Method 8015D/GRO
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte ug/l ug/l ug/l date / time
TPH (GC/FID) Low Fraction 437 B J 314 1000 10 10/19/2024 06:41 WG2385206
(S)
a,a,a-Trifluorotoluene(FID)87.2 78.0-120 10/19/2024 06:41 WG2385206
Sample Narrative:
L1788351-06 WG2385206: Lowest possible dilution due to sediment in smaple vial.
Volatile Organic Compounds (GC/MS) by Method 8260B
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte ug/l ug/l ug/l date / time
Benzene U 0.941 10.0 10 10/18/2024 12:09 WG2384622
Toluene U 2.78 10.0 10 10/18/2024 12:09 WG2384622
Ethylbenzene U 1.37 10.0 10 10/18/2024 12:09 WG2384622
Total Xylenes U 1.74 30.0 10 10/18/2024 12:09 WG2384622
Methyl tert-butyl ether U 1.01 10.0 10 10/18/2024 12:09 WG2384622
Naphthalene U 10.0 50.0 10 10/18/2024 12:09 WG2384622
(S) Toluene-d8 111 80.0-120 10/18/2024 12:09 WG2384622
(S) 4-Bromofluorobenzene 98.6 77.0-126 10/18/2024 12:09 WG2384622
(S) 1,2-Dichloroethane-d4 99.2 70.0-130 10/18/2024 12:09 WG2384622
Sample Narrative:
L1788351-06 WG2384622: Lowest possible dilution due to sediment in sample vial.
Semi-Volatile Organic Compounds (GC) by Method 8015
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte ug/l ug/l ug/l date / time
C10-C28 Diesel Range 245 J 111 500 5 10/25/2024 00:05 WG2388354
(S) o-Terphenyl 14.3 J2 52.0-156 10/25/2024 00:05 WG2388354
Sample Narrative:
L1788351-06 WG2388354: Sample produced heavy emulsion during Extraction process, low surr/spike recoveries due to matrix
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
One Atlas L1788351 10/28/24 12:00 11 of 20
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
One Atlas L1788351 10/28/24 12:04 11 of 20
SAMPLE RESULTS - 07
L1788351
MW-16
Collected date/time: 10/11/24 06:45
Volatile Organic Compounds (GC) by Method 8015D/GRO
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte ug/l ug/l ug/l date / time
TPH (GC/FID) Low Fraction 301 B 31.4 100 1 10/19/2024 01:19 WG2385206
(S)
a,a,a-Trifluorotoluene(FID)87.0 78.0-120 10/19/2024 01:19 WG2385206
Volatile Organic Compounds (GC/MS) by Method 8260B
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte ug/l ug/l ug/l date / time
Benzene U 0.0941 1.00 1 10/18/2024 10:24 WG2384622
Toluene U 0.278 1.00 1 10/18/2024 10:24 WG2384622
Ethylbenzene U 0.137 1.00 1 10/18/2024 10:24 WG2384622
Total Xylenes U 0.174 3.00 1 10/18/2024 10:24 WG2384622
Methyl tert-butyl ether 0.186 J 0.101 1.00 1 10/18/2024 10:24 WG2384622
Naphthalene U 1.00 5.00 1 10/18/2024 10:24 WG2384622
(S) Toluene-d8 109 80.0-120 10/18/2024 10:24 WG2384622
(S) 4-Bromofluorobenzene 95.9 77.0-126 10/18/2024 10:24 WG2384622
(S) 1,2-Dichloroethane-d4 101 70.0-130 10/18/2024 10:24 WG2384622
Semi-Volatile Organic Compounds (GC) by Method 8015
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte ug/l ug/l ug/l date / time
C10-C28 Diesel Range 56.8 J 22.2 100 1 10/25/2024 00:26 WG2388354
(S) o-Terphenyl 118 52.0-156 10/25/2024 00:26 WG2388354
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
One Atlas L1788351 10/28/24 12:00 12 of 20
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
One Atlas L1788351 10/28/24 12:04 12 of 20
SAMPLE RESULTS - 08
L1788351
TRIP BLANK
Collected date/time: 10/11/24 00:00
Volatile Organic Compounds (GC/MS) by Method 8260B
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte ug/l ug/l ug/l date / time
Benzene U 0.0941 1.00 1 10/18/2024 05:45 WG2384622
Toluene U 0.278 1.00 1 10/18/2024 05:45 WG2384622
Ethylbenzene U 0.137 1.00 1 10/18/2024 05:45 WG2384622
Total Xylenes U 0.174 3.00 1 10/18/2024 05:45 WG2384622
Methyl tert-butyl ether U 0.101 1.00 1 10/18/2024 05:45 WG2384622
Naphthalene U 1.00 5.00 1 10/18/2024 05:45 WG2384622
(S) Toluene-d8 110 80.0-120 10/18/2024 05:45 WG2384622
(S) 4-Bromofluorobenzene 92.6 77.0-126 10/18/2024 05:45 WG2384622
(S) 1,2-Dichloroethane-d4 104 70.0-130 10/18/2024 05:45 WG2384622
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
One Atlas L1788351 10/28/24 12:00 13 of 20
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
One Atlas L1788351 10/28/24 12:04 13 of 20
QUALITY CONTROL SUMMARYWG2385206
Volatile Organic Compounds (GC) by Method 8015D/GRO L1788351-01,02,03,04,05,06,07
Method Blank (MB)
(MB) R4135277-2 10/18/24 20:17
MB Result MB Qualifier MB MDL MB RDL
Analyte ug/l ug/l ug/l
TPH (GC/FID) Low Fraction 46.4 J 31.4 100
(S)
a,a,a-Trifluorotoluene(FID)86.3 78.0-120
Laboratory Control Sample (LCS)
(LCS) R4135277-1 10/18/24 18:44
Spike Amount LCS Result LCS Rec.Rec. Limits LCS Qualifier
Analyte ug/l ug/l %%
TPH (GC/FID) Low Fraction 5000 4430 88.6 72.0-127
(S)
a,a,a-Trifluorotoluene(FID) 92.5 78.0-120
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
One Atlas L1788351 10/28/24 12:00 14 of 20
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
One Atlas L1788351 10/28/24 12:04 14 of 20
QUALITY CONTROL SUMMARYWG2384622
Volatile Organic Compounds (GC/MS) by Method 8260B L1788351-02,03,04,05,06,07,08
Method Blank (MB)
(MB) R4136755-3 10/18/24 05:02
MB Result MB Qualifier MB MDL MB RDL
Analyte ug/l ug/l ug/l
Benzene U 0.0941 1.00
Toluene U 0.278 1.00
Ethylbenzene U 0.137 1.00
Total Xylenes U 0.174 3.00
Methyl tert-butyl ether U 0.101 1.00
Naphthalene U 1.00 5.00
(S) Toluene-d8 110 80.0-120
(S) 4-Bromofluorobenzene 92.1 77.0-126
(S) 1,2-Dichloroethane-d4 107 70.0-130
Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD)
(LCS) R4136755-1 10/18/24 03:59 • (LCSD) R4136755-2 10/18/24 04:20
Spike Amount LCS Result LCSD Result LCS Rec.LCSD Rec.Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits
Analyte ug/l ug/l ug/l %%%%%
Benzene 5.00 5.01 5.16 100 103 70.0-123 2.95 20
Toluene 5.00 5.28 5.43 106 109 79.0-120 2.80 20
Ethylbenzene 5.00 5.01 5.29 100 106 79.0-123 5.44 20
Total Xylenes 15.0 15.1 15.8 101 105 79.0-123 4.53 20
Methyl tert-butyl ether 5.00 5.18 5.24 104 105 68.0-125 1.15 20
Naphthalene 5.00 5.37 5.05 107 101 54.0-135 6.14 20
(S) Toluene-d8 110 108 80.0-120
(S) 4-Bromofluorobenzene 93.3 93.8 77.0-126
(S) 1,2-Dichloroethane-d4 107 106 70.0-130
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
One Atlas L1788351 10/28/24 12:00 15 of 20
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
One Atlas L1788351 10/28/24 12:04 15 of 20
QUALITY CONTROL SUMMARYWG2388268
Volatile Organic Compounds (GC/MS) by Method 8260B L1788351-01
Method Blank (MB)
(MB) R4137321-3 10/24/24 00:31
MB Result MB Qualifier MB MDL MB RDL
Analyte ug/l ug/l ug/l
Benzene U 0.0941 1.00
Toluene U 0.278 1.00
Ethylbenzene U 0.137 1.00
Total Xylenes U 0.174 3.00
Methyl tert-butyl ether U 0.101 1.00
Naphthalene U 1.00 5.00
(S) Toluene-d8 111 80.0-120
(S) 4-Bromofluorobenzene 108 77.0-126
(S) 1,2-Dichloroethane-d4 109 70.0-130
Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD)
(LCS) R4137321-1 10/23/24 23:27 • (LCSD) R4137321-2 10/23/24 23:48
Spike Amount LCS Result LCSD Result LCS Rec.LCSD Rec.Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits
Analyte ug/l ug/l ug/l %%%%%
Benzene 5.00 5.01 4.64 100 92.8 70.0-123 7.67 20
Toluene 5.00 4.55 4.39 91.0 87.8 79.0-120 3.58 20
Ethylbenzene 5.00 4.41 4.61 88.2 92.2 79.0-123 4.43 20
Total Xylenes 15.0 13.9 13.7 92.7 91.3 79.0-123 1.45 20
Methyl tert-butyl ether 5.00 5.30 5.28 106 106 68.0-125 0.378 20
Naphthalene 5.00 3.18 3.58 63.6 71.6 54.0-135 J J 11.8 20
(S) Toluene-d8 107 105 80.0-120
(S) 4-Bromofluorobenzene 107 106 77.0-126
(S) 1,2-Dichloroethane-d4 113 109 70.0-130
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
One Atlas L1788351 10/28/24 12:00 16 of 20
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
One Atlas L1788351 10/28/24 12:04 16 of 20
QUALITY CONTROL SUMMARYWG2388354
Semi-Volatile Organic Compounds (GC) by Method 8015 L1788351-01,02,03,04,05,06,07
Method Blank (MB)
(MB) R4137458-1 10/24/24 18:12
MB Result MB Qualifier MB MDL MB RDL
Analyte ug/l ug/l ug/l
C10-C28 Diesel Range U 22.2 100
(S) o-Terphenyl 109 52.0-156
Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD)
(LCS) R4137458-2 10/24/24 18:32 • (LCSD) R4137458-3 10/24/24 18:53
Spike Amount LCS Result LCSD Result LCS Rec.LCSD Rec.Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits
Analyte ug/l ug/l ug/l %%%%%
C10-C28 Diesel Range 1500 1590 1590 106 106 50.0-150 0.000 20
(S) o-Terphenyl 119 110 52.0-156
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
One Atlas L1788351 10/28/24 12:00 17 of 20
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
One Atlas L1788351 10/28/24 12:04 17 of 20
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.
Limits
These 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.
Qualifier
This column provides a letter and/or number designation that corresponds to additional information concerning the result
reported. 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 for
each 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 and
times of preparation and/or analysis.
Qualifier Description
B The same analyte is found in the associated blank.
J The identification of the analyte is acceptable; the reported value is an estimate.
J2 Surrogate recovery limits have been exceeded; values are outside lower control limits.
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
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Pace Analytical National 12065 Lebanon Rd Mount Juliet, TN 37122
Alabama 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 ¹TN00003
Colorado TN00003 New York 11742
Connecticut PH-0197 North Carolina Env375
Florida E87487 North Carolina ¹DW21704
Georgia NELAP North Carolina ³41
Georgia ¹923 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 ⁶KY90010 South Carolina 84004002
Kentucky ²16 South Dakota n/a
Louisiana AI30792 Tennessee ¹ ⁴2006
Louisiana LA018 Texas T104704245-20-18
Maine TN00003 Texas ⁵LAB0152
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 ⁵1461.02 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.
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
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