MO-2489_3898_G_WSW_20230515

May 15, 2023 MEMORANDUM
TO: David Lilley, Environmental Toxicologist, Division of Waste Management, 1646 Mail Service Center, Raleigh, NC 27699-1646 (FAX [phone])
FROM: Brad Newton, Mooresville Regional Office, UST Section SUBJECT: Request for Health Risk Evaluation of Water Supply Tracking ID: Incident Number: 3898 Enclosed please find the analytical results for a water sample collected on January 10, 2023, from the Little water supply well, identified as WSW-Little, located at 5683 East NC Highway 150, Denver, Catawba County. Please perform a health risk evaluation and send the evaluation with your recommendation and a copy of this memo to me. I will then forward the health risk evaluation and recommendation to any well users.
If you have questions or need additional information, please contact me at the address or telephone number below. Thank you for your assistance. Attachment(s): Little Sample Analytical Results
,
REPORT OF ANALYSISReport Number :
Project
Information :
NC 28110
23-114-0018
00087
Geological Resources, Inc.
3502 Hayes Road
Scott Ball
Monroe
Danyale Love
Project Manager
GRI #2099 Received : 04/24/2023
Express Food Mart
Report Date : 05/02/2023
Sample ID :
Lab No :
Sampled:WSW-Little
94769 Matrix:
4/24/2023 13:10
Aqueous
Analytical Method:
Prep Method:
Test Results Units MDL MQL By Analytical
Batch
Date / Time
Analyzed
DF
6200 PT
6200B Prep Batch(es):V32558 04/27/23 14:00
<1.80 µg/L 1.80 10.0Acetone 1 04/28/23 06:43 V32559MSA
<0.180 µg/L 0.180 0.500Benzene 1 04/28/23 06:43 V32559MSA
<0.210 µg/L 0.210 0.500Bromobenzene 1 04/28/23 06:43 V32559MSA
<0.420 µg/L 0.420 1.00Bromochloromethane 1 04/28/23 06:43 V32559MSA
<0.160 µg/L 0.160 0.500Bromodichloromethane 1 04/28/23 06:43 V32559MSA
<1.50 µg/L 1.50 5.00Bromoform 1 04/28/23 06:43 V32559MSA
<0.280 µg/L 0.280 1.00Bromomethane 1 04/28/23 06:43 V32559MSA
<0.180 µg/L 0.180 0.500n-Butylbenzene 1 04/28/23 06:43 V32559MSA
<0.200 µg/L 0.200 0.500
sec-Butyl benzene 1 04/28/23 06:43 V32559MSA
<0.920 µg/L 0.920 2.00tert-Butyl benzene 1 04/28/23 06:43 V32559MSA
<0.180 µg/L 0.180 0.500Carbon Tetrachloride 1 04/28/23 06:43 V32559MSA
<0.190 µg/L 0.190 0.500Chlorobenzene 1 04/28/23 06:43 V32559MSA
<0.190 µg/L 0.190 0.500Chlorodibromomethane 1 04/28/23 06:43 V32559MSA
<0.430 µg/L 0.430 1.00Chloroethane 1 04/28/23 06:43 V32559MSA
1.61 µg/L 0.220 0.500Chloroform 1 04/28/23 06:43 V32559MSA
<0.220 µg/L 0.220 0.500
Chloromethane 1 04/28/23 06:43 V32559MSA
<0.200 µg/L 0.200 0.5002-Chlorotoluene 1 04/28/23 06:43 V32559MSA
<0.200 µg/L 0.200 0.5004-Chlorotoluene 1 04/28/23 06:43 V32559MSA
0.685 µg/L 0.500 0.500Di-Isopropyl Ether (DIPE)1 04/28/23 06:43 V32559MSA
<1.10 µg/L 1.10 2.001,2-Dibromo-3-Chloropropane 1 04/28/23 06:43 V32559MSA
<0.230 µg/L 0.230 0.500Dibromomethane 1 04/28/23 06:43 V32559MSA
<0.220 µg/L 0.220 0.5001,2-Dichlorobenzene 1 04/28/23 06:43 V32559MSA
Qualifiers/
Definitions
Estimated valueJDilution FactorDF
Method Quantitation LimitMQL
Page 23 of 51
,
REPORT OF ANALYSISReport Number :
Project
Information :
NC 28110
23-114-0018
00087
Geological Resources, Inc.
3502 Hayes Road
Scott Ball
Monroe
Danyale Love
Project Manager
GRI #2099 Received : 04/24/2023
Express Food Mart
Report Date : 05/02/2023
Sample ID :
Lab No :
Sampled:WSW-Little
94769 Matrix:
4/24/2023 13:10
Aqueous
Analytical Method:
Prep Method:
Test Results Units MDL MQL By Analytical
Batch
Date / Time
Analyzed
DF
6200 PT
6200B Prep Batch(es):V32558 04/27/23 14:00
<0.190 µg/L 0.190 0.5001,3-Dichlorobenzene 1 04/28/23 06:43 V32559MSA
<0.210 µg/L 0.210 0.5001,4-Dichlorobenzene 1 04/28/23 06:43 V32559MSA
<1.20 µg/L 1.20 5.00Dichlorodifluoromethane 1 04/28/23 06:43 V32559MSA
<0.240 µg/L 0.240 0.5001,1-Dichloroethane 1 04/28/23 06:43 V32559MSA
<0.150 µg/L 0.150 0.5001,2-Dichloroethane 1 04/28/23 06:43 V32559MSA
<0.150 µg/L 0.150 0.5001,1-Dichloroethene 1 04/28/23 06:43 V32559MSA
<0.200 µg/L 0.200 0.500cis-1,2-Dichloroethene 1 04/28/23 06:43 V32559MSA
<0.180 µg/L 0.180 0.500trans-1,2-Dichloroethene 1 04/28/23 06:43 V32559MSA
<0.190 µg/L 0.190 0.500
1,2-Dichloropropane 1 04/28/23 06:43 V32559MSA
<0.130 µg/L 0.130 0.5001,3-Dichloropropane 1 04/28/23 06:43 V32559MSA
<0.210 µg/L 0.210 2.002,2-Dichloropropane 1 04/28/23 06:43 V32559MSA
<0.200 µg/L 0.200 0.5001,1-Dichloropropene 1 04/28/23 06:43 V32559MSA
<0.210 µg/L 0.210 0.500cis-1,3-Dichloropropene 1 04/28/23 06:43 V32559MSA
<0.150 µg/L 0.150 0.500trans-1,3-Dichloropropene 1 04/28/23 06:43 V32559MSA
<42.0 µg/L 42.0 200Ethanol 1 04/28/23 06:43 V32559MSA
<0.170 µg/L 0.170 0.500
Ethylbenzene 1 04/28/23 06:43 V32559MSA
<0.350 µg/L 0.350 3.00Hexachlorobutadiene 1 04/28/23 06:43 V32559MSA
<0.380 µg/L 0.380 1.002-Hexanone 1 04/28/23 06:43 V32559MSA
<0.180 µg/L 0.180 0.500Isopropylbenzene 1 04/28/23 06:43 V32559MSA
<0.089 µg/L 0.089 0.5004-Isopropyl toluene 1 04/28/23 06:43 V32559MSA
<0.710 µg/L 0.710 5.00Methyl Ethyl Ketone (MEK)1 04/28/23 06:43 V32559MSA
<0.140 µg/L 0.140 1.00Methyl tert-butyl ether (MTBE)1 04/28/23 06:43 V32559MSA
Qualifiers/
Definitions
Estimated valueJDilution FactorDF
Method Quantitation LimitMQL
Page 24 of 51
,
REPORT OF ANALYSISReport Number :
Project
Information :
NC 28110
23-114-0018
00087
Geological Resources, Inc.
3502 Hayes Road
Scott Ball
Monroe
Danyale Love
Project Manager
GRI #2099 Received : 04/24/2023
Express Food Mart
Report Date : 05/02/2023
Sample ID :
Lab No :
Sampled:WSW-Little
94769 Matrix:
4/24/2023 13:10
Aqueous
Analytical Method:
Prep Method:
Test Results Units MDL MQL By Analytical
Batch
Date / Time
Analyzed
DF
6200 PT
6200B Prep Batch(es):V32558 04/27/23 14:00
<0.078 µg/L 0.078 1.004-Methyl-2-Pentanone 1 04/28/23 06:43 V32559MSA
<0.330 µg/L 0.330 2.00Methylene Chloride 1 04/28/23 06:43 V32559MSA
<0.470 µg/L 0.470 1.00Naphthalene 1 04/28/23 06:43 V32559MSA
<0.190 µg/L 0.190 0.500n-Propylbenzene 1 04/28/23 06:43 V32559MSA
<0.220 µg/L 0.220 0.500Styrene 1 04/28/23 06:43 V32559MSA
<0.160 µg/L 0.160 0.5001,1,1,2-Tetrachloroethane 1 04/28/23 06:43 V32559MSA
<0.160 µg/L 0.160 0.5001,1,2,2-Tetrachloroethane 1 04/28/23 06:43 V32559MSA
<0.220 µg/L 0.220 0.500Tetrachloroethene 1 04/28/23 06:43 V32559MSA
<0.220 µg/L 0.220 0.500
Toluene 1 04/28/23 06:43 V32559MSA
<0.380 µg/L 0.380 0.5001,2,3-Trichlorobenzene 1 04/28/23 06:43 V32559MSA
<0.310 µg/L 0.310 0.5001,2,4-Trichlorobenzene 1 04/28/23 06:43 V32559MSA
<0.160 µg/L 0.160 0.5001,1,1-Trichloroethane 1 04/28/23 06:43 V32559MSA
<0.096 µg/L 0.096 0.5001,1,2-Trichloroethane 1 04/28/23 06:43 V32559MSA
<0.180 µg/L 0.180 0.500Trichloroethene 1 04/28/23 06:43 V32559MSA
<0.180 µg/L 0.180 0.500Trichlorofluoromethane 1 04/28/23 06:43 V32559MSA
<0.270 µg/L 0.270 0.500
1,2,3-Trichloropropane 1 04/28/23 06:43 V32559MSA
<0.190 µg/L 0.190 0.5001,2,4-Trimethylbenzene 1 04/28/23 06:43 V32559MSA
<0.180 µg/L 0.180 0.5001,3,5-Trimethylbenzene 1 04/28/23 06:43 V32559MSA
<1.00 µg/L 1.00 5.00Vinyl Acetate 1 04/28/23 06:43 V32559MSA
<0.170 µg/L 0.170 0.500Vinyl Chloride 1 04/28/23 06:43 V32559MSA
<0.210 µg/L 0.210 0.500o-Xylene 1 04/28/23 06:43 V32559MSA
<0.420 µg/L 0.420 1.00m,p-Xylene 1 04/28/23 06:43 V32559MSA
Qualifiers/
Definitions
Estimated valueJDilution FactorDF
Method Quantitation LimitMQL
Page 25 of 51
,
REPORT OF ANALYSISReport Number :
Project
Information :
NC 28110
23-114-0018
00087
Geological Resources, Inc.
3502 Hayes Road
Scott Ball
Monroe
Danyale Love
Project Manager
GRI #2099 Received : 04/24/2023
Express Food Mart
Report Date : 05/02/2023
Sample ID :
Lab No :
Sampled:WSW-Little
94769 Matrix:
4/24/2023 13:10
Aqueous
Analytical Method:
Prep Method:
Test Results Units MDL MQL By Analytical
Batch
Date / Time
Analyzed
DF
6200 PT
6200B Prep Batch(es):V32558 04/27/23 14:00
<0.21 µg/L 0.210 0.500Xylene (Total)1 04/28/23 06:43 V32559
Surrogate: 4-Bromofluorobenzene 99.8 Limits: 70-130%04/28/23 06:431 MSA V32559
Surrogate: Dibromofluoromethane 98.8 Limits: 70-130%04/28/23 06:431 MSA V32559
Surrogate: 1,2-Dichloroethane - d4 96.6 Limits: 70-130%04/28/23 06:431 MSA V32559
Surrogate: Toluene-d8 101 Limits: 70-130%04/28/23 06:431 MSA V32559
Analytical Method:
Prep Method:
Test Results Units MDL MQL By Analytical
Batch
Date / Time
Analyzed
DF
EPA-504.1(PREP)
EPA-504.1 Prep Batch(es):V32463 04/27/23 09:37
<0.00342 µg/L 0.02071,2-Dibromoethane 1 04/27/23 14:36 V32508AMP
Qualifiers/
Definitions
Estimated valueJDilution FactorDF
Method Quantitation LimitMQL
Page 26 of 51
Quality Control Data
23-114-0018Report No:
Project Description:
Client ID:Geological Resources, Inc.
Express Food Mart
QC Prep Batch Method:
Volatile Organic Compounds - GC/MS
6200B
V32548QC Analytical Batch(es):
Analysis Method:
Analysis Description:
6200 PT
QC Prep:V32546
Associated Lab Samples: 94766, 94768
LRB-V32546 Matrix: AQULab Reagent Blank
Parameter
AnalyzedMQLMDLBlank
ResultUnits
%
Recovery
% Rec
Limits
04/27/23 15:3210.01.80<1.80µg/LAcetone
04/27/23 15:320.5000.180<0.180µg/LBenzene
04/27/23 15:320.5000.210<0.210µg/LBromobenzene
04/27/23 15:321.000.420<0.420µg/LBromochloromethane
04/27/23 15:320.5000.160<0.160µg/LBromodichloromethane
04/27/23 15:325.001.50<1.50µg/LBromoform
04/27/23 15:321.000.280<0.280µg/LBromomethane
04/27/23 15:320.5000.180<0.180µg/Ln-Butylbenzene
04/27/23 15:320.5000.200<0.200µg/Lsec-Butyl benzene
04/27/23 15:322.000.920<0.920µg/Ltert-Butyl benzene
04/27/23 15:320.5000.180<0.180µg/LCarbon Tetrachloride
04/27/23 15:320.5000.190<0.190µg/LChlorobenzene
04/27/23 15:320.5000.190<0.190µg/LChlorodibromomethane
04/27/23 15:321.000.430<0.430µg/LChloroethane
04/27/23 15:320.5000.220<0.220µg/LChloroform
04/27/23 15:320.5000.220<0.220µg/LChloromethane
04/27/23 15:320.5000.200<0.200µg/L2-Chlorotoluene
04/27/23 15:320.5000.200<0.200µg/L4-Chlorotoluene
04/27/23 15:320.5000.500<0.500µg/LDi-Isopropyl Ether (DIPE)
04/27/23 15:322.001.10<1.10µg/L1,2-Dibromo-3-Chloropropane
04/27/23 15:320.5000.200<0.200µg/L1,2-Dibromoethane
04/27/23 15:320.5000.230<0.230µg/LDibromomethane
04/27/23 15:320.5000.220<0.220µg/L1,2-Dichlorobenzene
04/27/23 15:320.5000.190<0.190µg/L1,3-Dichlorobenzene
04/27/23 15:320.5000.210<0.210µg/L1,4-Dichlorobenzene
04/27/23 15:325.001.20<1.20µg/LDichlorodifluoromethane
04/27/23 15:320.5000.240<0.240µg/L1,1-Dichloroethane
Page 1 of 19Date:05/02/2023 10:47 AM
Page 31 of 51
Quality Control Data
23-114-0018Report No:
Project Description:
Client ID:Geological Resources, Inc.
Express Food Mart
QC Prep Batch Method:
Volatile Organic Compounds - GC/MS
6200B
V32548QC Analytical Batch(es):
Analysis Method:
Analysis Description:
6200 PT
QC Prep:V32546
Associated Lab Samples: 94766, 94768
LRB-V32546 Matrix: AQULab Reagent Blank
Parameter
AnalyzedMQLMDLBlank
ResultUnits
%
Recovery
% Rec
Limits
04/27/23 15:320.5000.150<0.150µg/L1,2-Dichloroethane
04/27/23 15:320.5000.150<0.150µg/L1,1-Dichloroethene
04/27/23 15:320.5000.200<0.200µg/Lcis-1,2-Dichloroethene
04/27/23 15:320.5000.180<0.180µg/Ltrans-1,2-Dichloroethene
04/27/23 15:320.5000.190<0.190µg/L1,2-Dichloropropane
04/27/23 15:320.5000.130<0.130µg/L1,3-Dichloropropane
04/27/23 15:322.000.210<0.210µg/L2,2-Dichloropropane
04/27/23 15:320.5000.200<0.200µg/L1,1-Dichloropropene
04/27/23 15:320.5000.210<0.210µg/Lcis-1,3-Dichloropropene
04/27/23 15:320.5000.150<0.150µg/Ltrans-1,3-Dichloropropene
04/27/23 15:3220042.0<42.0µg/LEthanol
04/27/23 15:320.5000.170<0.170µg/LEthylbenzene
04/27/23 15:323.000.350<0.350µg/LHexachlorobutadiene
04/27/23 15:321.000.380<0.380µg/L2-Hexanone
04/27/23 15:320.5000.180<0.180µg/LIsopropylbenzene
04/27/23 15:320.5000.089<0.089µg/L4-Isopropyl toluene
04/27/23 15:325.000.710<0.710µg/LMethyl Ethyl Ketone (MEK)
04/27/23 15:321.000.140<0.140µg/LMethyl tert-butyl ether (MTBE)
04/27/23 15:321.000.078<0.078µg/L4-Methyl-2-Pentanone
04/27/23 15:322.000.330<0.330µg/LMethylene Chloride
04/27/23 15:321.000.470<0.470µg/LNaphthalene
04/27/23 15:320.5000.190<0.190µg/Ln-Propylbenzene
04/27/23 15:320.5000.220<0.220µg/LStyrene
04/27/23 15:320.5000.160<0.160µg/L1,1,1,2-Tetrachloroethane
04/27/23 15:320.5000.160<0.160µg/L1,1,2,2-Tetrachloroethane
04/27/23 15:320.5000.220<0.220µg/LTetrachloroethene
04/27/23 15:320.5000.220<0.220µg/LToluene
Page 2 of 19Date:05/02/2023 10:47 AM
Page 32 of 51
Quality Control Data
23-114-0018Report No:
Project Description:
Client ID:Geological Resources, Inc.
Express Food Mart
QC Prep Batch Method:
Volatile Organic Compounds - GC/MS
6200B
V32548QC Analytical Batch(es):
Analysis Method:
Analysis Description:
6200 PT
QC Prep:V32546
Associated Lab Samples: 94766, 94768
LRB-V32546 Matrix: AQULab Reagent Blank
Parameter
AnalyzedMQLMDLBlank
ResultUnits
%
Recovery
% Rec
Limits
04/27/23 15:320.5000.380<0.380µg/L1,2,3-Trichlorobenzene
04/27/23 15:320.5000.310<0.310µg/L1,2,4-Trichlorobenzene
04/27/23 15:320.5000.160<0.160µg/L1,1,1-Trichloroethane
04/27/23 15:320.5000.096<0.096µg/L1,1,2-Trichloroethane
04/27/23 15:320.5000.180<0.180µg/LTrichloroethene
04/27/23 15:320.5000.180<0.180µg/LTrichlorofluoromethane
04/27/23 15:320.5000.270<0.270µg/L1,2,3-Trichloropropane
04/27/23 15:320.5000.190<0.190µg/L1,2,4-Trimethylbenzene
04/27/23 15:320.5000.180<0.180µg/L1,3,5-Trimethylbenzene
04/27/23 15:325.001.00<1.00µg/LVinyl Acetate
04/27/23 15:320.5000.170<0.170µg/LVinyl Chloride
04/27/23 15:320.5000.210<0.210µg/Lo-Xylene
04/27/23 15:321.000.420<0.420µg/Lm,p-Xylene
04/27/23 15:324-Bromofluorobenzene (S)98.2 70-130
04/27/23 15:32Dibromofluoromethane (S)97.2 70-130
04/27/23 15:321,2-Dichloroethane - d4 (S)96.4 70-130
04/27/23 15:32Toluene-d8 (S)102 70-130
LCS-V32546 LCSD-V32546Laboratory Control Sample & LCSD
LCSD
ResultParameter Max
RPD
LCSD
% Rec
LCS
%Rec
LCS
Result
Spike
Conc.Units
% Rec
Limits RPD
26.3 65.760.524.240.0µg/LAcetone 40-160 8.3 20.0
18.5 92.592.518.520.0µg/LBenzene 70-130 0.0 20.0
19.6 98.097.519.520.0µg/LBromobenzene 70-130 0.5 20.0
18.7 93.593.518.720.0µg/LBromochloromethane 70-130 0.0 20.0
18.3 91.594.518.920.0µg/LBromodichloromethane 70-130 3.2 20.0
Page 3 of 19Date:05/02/2023 10:47 AM
Page 33 of 51
Quality Control Data
23-114-0018Report No:
Project Description:
Client ID:Geological Resources, Inc.
Express Food Mart
QC Prep Batch Method:
Volatile Organic Compounds - GC/MS
6200B
V32548QC Analytical Batch(es):
Analysis Method:
Analysis Description:
6200 PT
QC Prep:V32546
LCS-V32546 LCSD-V32546Laboratory Control Sample & LCSD
LCSD
ResultParameter Max
RPD
LCSD
% Rec
LCS
%Rec
LCS
Result
Spike
Conc.Units
% Rec
Limits RPD
19.7 98.595.519.120.0µg/LBromoform 70-130 3.0 20.0
18.1 90.593.018.620.0µg/LBromomethane 60-140 2.7 20.0
19.6 98.097.519.520.0µg/Ln-Butylbenzene 70-130 0.5 20.0
19.1 95.595.519.120.0µg/Lsec-Butyl benzene 70-130 0.0 20.0
19.0 95.094.518.920.0µg/Ltert-Butyl benzene 70-130 0.5 20.0
17.8 89.090.018.020.0µg/LCarbon Tetrachloride 70-130 1.1 20.0
18.6 93.094.018.820.0µg/LChlorobenzene 70-130 1.0 20.0
19.8 99.096.019.220.0µg/LChlorodibromomethane 70-130 3.0 20.0
22.3 11211022.020.0µg/LChloroethane 60-140 1.3 20.0
18.6 93.091.518.320.0µg/LChloroform 70-130 1.6 20.0
17.1 85.588.017.620.0µg/LChloromethane 60-140 2.8 20.0
19.5 97.594.518.920.0µg/L2-Chlorotoluene 70-130 3.1 20.0
19.5 97.596.519.320.0µg/L4-Chlorotoluene 70-130 1.0 20.0
18.6 93.091.518.320.0µg/LDi-Isopropyl Ether (DIPE)70-130 1.6 20.0
21.7 10910220.320.0µg/L1,2-Dibromo-3-Chloropropane 70-130 6.6 20.0
19.3 96.594.518.920.0µg/L1,2-Dibromoethane 70-130 2.0 20.0
18.7 93.591.018.220.0µg/LDibromomethane 70-130 2.7 20.0
20.2 10198.019.620.0µg/L1,2-Dichlorobenzene 70-130 3.0 20.0
20.0 10099.519.920.0µg/L1,3-Dichlorobenzene 70-130 0.5 20.0
19.7 98.596.519.320.0µg/L1,4-Dichlorobenzene 70-130 2.0 20.0
18.5 92.591.518.320.0µg/LDichlorodifluoromethane 60-140 1.0 20.0
18.8 94.094.518.920.0µg/L1,1-Dichloroethane 70-130 0.5 20.0
18.8 94.090.018.020.0µg/L1,2-Dichloroethane 70-130 4.3 20.0
18.6 93.094.018.820.0µg/L1,1-Dichloroethene 70-130 1.0 20.0
18.7 93.594.518.920.0µg/Lcis-1,2-Dichloroethene 70-130 1.0 20.0
18.6 93.094.018.820.0µg/Ltrans-1,2-Dichloroethene 70-130 1.0 20.0
Page 4 of 19Date:05/02/2023 10:47 AM
Page 34 of 51
Quality Control Data
23-114-0018Report No:
Project Description:
Client ID:Geological Resources, Inc.
Express Food Mart
QC Prep Batch Method:
Volatile Organic Compounds - GC/MS
6200B
V32548QC Analytical Batch(es):
Analysis Method:
Analysis Description:
6200 PT
QC Prep:V32546
LCS-V32546 LCSD-V32546Laboratory Control Sample & LCSD
LCSD
ResultParameter Max
RPD
LCSD
% Rec
LCS
%Rec
LCS
Result
Spike
Conc.Units
% Rec
Limits RPD
18.8 94.091.518.320.0µg/L1,2-Dichloropropane 70-130 2.6 20.0
18.7 93.593.018.620.0µg/L1,3-Dichloropropane 70-130 0.5 20.0
18.8 94.097.019.420.0µg/L2,2-Dichloropropane 70-130 3.1 20.0
19.1 95.595.519.120.0µg/L1,1-Dichloropropene 70-130 0.0 20.0
19.0 95.094.018.820.0µg/Lcis-1,3-Dichloropropene 70-130 1.0 20.0
18.7 93.592.518.520.0µg/Ltrans-1,3-Dichloropropene 70-130 1.0 20.0
459 91.886.4432500µg/LEthanol 60-140 6.0 20.0
18.7 93.592.518.520.0µg/LEthylbenzene 70-130 1.0 20.0
19.2 96.010020.020.0µg/LHexachlorobutadiene 70-130 4.0 20.0
17.5 87.580.516.120.0µg/L2-Hexanone 60-140 8.3 20.0
19.9 99.597.519.520.0µg/LIsopropylbenzene 70-130 2.0 20.0
19.7 98.598.019.620.0µg/L4-Isopropyl toluene 70-130 0.5 20.0
18.2 91.083.016.620.0µg/LMethyl Ethyl Ketone (MEK)60-140 9.1 20.0
19.5 97.594.018.820.0µg/LMethyl tert-butyl ether (MTBE)70-130 3.6 20.0
18.4 92.084.016.820.0µg/L4-Methyl-2-Pentanone 60-140 9.0 20.0
16.8 84.083.516.720.0µg/LMethylene Chloride 70-130 0.5 20.0
20.3 10296.019.220.0µg/LNaphthalene 70-130 5.5 20.0
19.3 96.596.019.220.0µg/Ln-Propylbenzene 70-130 0.5 20.0
19.5 97.596.519.320.0µg/LStyrene 70-130 1.0 20.0
19.7 98.597.519.520.0µg/L1,1,1,2-Tetrachloroethane 70-130 1.0 20.0
19.5 97.596.019.220.0µg/L1,1,2,2-Tetrachloroethane 70-130 1.5 20.0
19.5 97.597.019.420.0µg/LTetrachloroethene 70-130 0.5 20.0
18.7 93.592.018.420.0µg/LToluene 70-130 1.6 20.0
22.0 11010621.220.0µg/L1,2,3-Trichlorobenzene 70-130 3.7 20.0
21.1 10610320.520.0µg/L1,2,4-Trichlorobenzene 70-130 2.8 20.0
18.2 91.092.018.420.0µg/L1,1,1-Trichloroethane 70-130 1.0 20.0
Page 5 of 19Date:05/02/2023 10:47 AM
Page 35 of 51
Quality Control Data
23-114-0018Report No:
Project Description:
Client ID:Geological Resources, Inc.
Express Food Mart
QC Prep Batch Method:
Volatile Organic Compounds - GC/MS
6200B
V32548QC Analytical Batch(es):
Analysis Method:
Analysis Description:
6200 PT
QC Prep:V32546
LCS-V32546 LCSD-V32546Laboratory Control Sample & LCSD
LCSD
ResultParameter Max
RPD
LCSD
% Rec
LCS
%Rec
LCS
Result
Spike
Conc.Units
% Rec
Limits RPD
19.0 95.093.018.620.0µg/L1,1,2-Trichloroethane 70-130 2.1 20.0
18.9 94.594.518.920.0µg/LTrichloroethene 70-130 0.0 20.0
19.3 96.596.519.320.0µg/LTrichlorofluoromethane 60-140 0.0 20.0
20.1 10193.518.720.0µg/L1,2,3-Trichloropropane 70-130 7.2 20.0
19.8 99.097.519.520.0µg/L1,2,4-Trimethylbenzene 70-130 1.5 20.0
19.6 98.097.519.520.0µg/L1,3,5-Trimethylbenzene 70-130 0.5 20.0
19.9 99.510020.020.0µg/LVinyl Acetate 60-140 0.5 20.0
18.9 94.596.019.220.0µg/LVinyl Chloride 60-140 1.5 20.0
19.1 95.595.019.020.0µg/Lo-Xylene 70-130 0.5 20.0
39.0 97.598.239.340.0µg/Lm,p-Xylene 70-130 0.7 20.0
10199.04-Bromofluorobenzene (S)70-130
97.299.2Dibromofluoromethane (S)70-130
10299.81,2-Dichloroethane - d4 (S)70-130
101101Toluene-d8 (S)70-130
Page 6 of 19Date:05/02/2023 10:47 AM
Page 36 of 51
Quality Control Data
23-114-0018Report No:
Project Description:
Client ID:Geological Resources, Inc.
Express Food Mart
QC Prep Batch Method:
Volatile Organic Compounds - GC/MS
6200B
V32559QC Analytical Batch(es):
Analysis Method:
Analysis Description:
6200 PT
QC Prep:V32558
Associated Lab Samples: 94769, 94770
LRB-V32558 Matrix: AQULab Reagent Blank
Parameter
AnalyzedMQLMDLBlank
ResultUnits
%
Recovery
% Rec
Limits
04/28/23 05:2110.01.80<1.80µg/LAcetone
04/28/23 05:210.5000.180<0.180µg/LBenzene
04/28/23 05:210.5000.210<0.210µg/LBromobenzene
04/28/23 05:211.000.420<0.420µg/LBromochloromethane
04/28/23 05:210.5000.160<0.160µg/LBromodichloromethane
04/28/23 05:215.001.50<1.50µg/LBromoform
04/28/23 05:211.000.280<0.280µg/LBromomethane
04/28/23 05:210.5000.180<0.180µg/Ln-Butylbenzene
04/28/23 05:210.5000.200<0.200µg/Lsec-Butyl benzene
04/28/23 05:212.000.920<0.920µg/Ltert-Butyl benzene
04/28/23 05:210.5000.180<0.180µg/LCarbon Tetrachloride
04/28/23 05:210.5000.190<0.190µg/LChlorobenzene
04/28/23 05:210.5000.190<0.190µg/LChlorodibromomethane
04/28/23 05:211.000.430<0.430µg/LChloroethane
04/28/23 05:210.5000.220<0.220µg/LChloroform
04/28/23 05:210.5000.220<0.220µg/LChloromethane
04/28/23 05:210.5000.200<0.200µg/L2-Chlorotoluene
04/28/23 05:210.5000.200<0.200µg/L4-Chlorotoluene
04/28/23 05:210.5000.500<0.500µg/LDi-Isopropyl Ether (DIPE)
04/28/23 05:212.001.10<1.10µg/L1,2-Dibromo-3-Chloropropane
04/28/23 05:210.5000.200<0.200µg/L1,2-Dibromoethane
04/28/23 05:210.5000.230<0.230µg/LDibromomethane
04/28/23 05:210.5000.220<0.220µg/L1,2-Dichlorobenzene
04/28/23 05:210.5000.190<0.190µg/L1,3-Dichlorobenzene
04/28/23 05:210.5000.210<0.210µg/L1,4-Dichlorobenzene
04/28/23 05:215.001.20<1.20µg/LDichlorodifluoromethane
04/28/23 05:210.5000.240<0.240µg/L1,1-Dichloroethane
Page 7 of 19Date:05/02/2023 10:47 AM
Page 37 of 51
Quality Control Data
23-114-0018Report No:
Project Description:
Client ID:Geological Resources, Inc.
Express Food Mart
QC Prep Batch Method:
Volatile Organic Compounds - GC/MS
6200B
V32559QC Analytical Batch(es):
Analysis Method:
Analysis Description:
6200 PT
QC Prep:V32558
Associated Lab Samples: 94769, 94770
LRB-V32558 Matrix: AQULab Reagent Blank
Parameter
AnalyzedMQLMDLBlank
ResultUnits
%
Recovery
% Rec
Limits
04/28/23 05:210.5000.150<0.150µg/L1,2-Dichloroethane
04/28/23 05:210.5000.150<0.150µg/L1,1-Dichloroethene
04/28/23 05:210.5000.200<0.200µg/Lcis-1,2-Dichloroethene
04/28/23 05:210.5000.180<0.180µg/Ltrans-1,2-Dichloroethene
04/28/23 05:210.5000.190<0.190µg/L1,2-Dichloropropane
04/28/23 05:210.5000.130<0.130µg/L1,3-Dichloropropane
04/28/23 05:212.000.210<0.210µg/L2,2-Dichloropropane
04/28/23 05:210.5000.200<0.200µg/L1,1-Dichloropropene
04/28/23 05:210.5000.210<0.210µg/Lcis-1,3-Dichloropropene
04/28/23 05:210.5000.150<0.150µg/Ltrans-1,3-Dichloropropene
04/28/23 05:2120042.0<42.0µg/LEthanol
04/28/23 05:210.5000.170<0.170µg/LEthylbenzene
04/28/23 05:213.000.350<0.350µg/LHexachlorobutadiene
04/28/23 05:211.000.380<0.380µg/L2-Hexanone
04/28/23 05:210.5000.180<0.180µg/LIsopropylbenzene
04/28/23 05:210.5000.089<0.089µg/L4-Isopropyl toluene
04/28/23 05:215.000.710<0.710µg/LMethyl Ethyl Ketone (MEK)
04/28/23 05:211.000.140<0.140µg/LMethyl tert-butyl ether (MTBE)
04/28/23 05:211.000.078<0.078µg/L4-Methyl-2-Pentanone
04/28/23 05:212.000.330<0.330µg/LMethylene Chloride
04/28/23 05:211.000.470<0.470µg/LNaphthalene
04/28/23 05:210.5000.190<0.190µg/Ln-Propylbenzene
04/28/23 05:210.5000.220<0.220µg/LStyrene
04/28/23 05:210.5000.160<0.160µg/L1,1,1,2-Tetrachloroethane
04/28/23 05:210.5000.160<0.160µg/L1,1,2,2-Tetrachloroethane
04/28/23 05:210.5000.220<0.220µg/LTetrachloroethene
04/28/23 05:210.5000.220<0.220µg/LToluene
Page 8 of 19Date:05/02/2023 10:47 AM
Page 38 of 51
Quality Control Data
23-114-0018Report No:
Project Description:
Client ID:Geological Resources, Inc.
Express Food Mart
QC Prep Batch Method:
Volatile Organic Compounds - GC/MS
6200B
V32559QC Analytical Batch(es):
Analysis Method:
Analysis Description:
6200 PT
QC Prep:V32558
Associated Lab Samples: 94769, 94770
LRB-V32558 Matrix: AQULab Reagent Blank
Parameter
AnalyzedMQLMDLBlank
ResultUnits
%
Recovery
% Rec
Limits
04/28/23 05:210.5000.380<0.380µg/L1,2,3-Trichlorobenzene
04/28/23 05:210.5000.310<0.310µg/L1,2,4-Trichlorobenzene
04/28/23 05:210.5000.160<0.160µg/L1,1,1-Trichloroethane
04/28/23 05:210.5000.096<0.096µg/L1,1,2-Trichloroethane
04/28/23 05:210.5000.180<0.180µg/LTrichloroethene
04/28/23 05:210.5000.180<0.180µg/LTrichlorofluoromethane
04/28/23 05:210.5000.270<0.270µg/L1,2,3-Trichloropropane
04/28/23 05:210.5000.190<0.190µg/L1,2,4-Trimethylbenzene
04/28/23 05:210.5000.180<0.180µg/L1,3,5-Trimethylbenzene
04/28/23 05:215.001.00<1.00µg/LVinyl Acetate
04/28/23 05:210.5000.170<0.170µg/LVinyl Chloride
04/28/23 05:210.5000.210<0.210µg/Lo-Xylene
04/28/23 05:211.000.420<0.420µg/Lm,p-Xylene
04/28/23 05:214-Bromofluorobenzene (S)101 70-130
04/28/23 05:21Dibromofluoromethane (S)97.8 70-130
04/28/23 05:211,2-Dichloroethane - d4 (S)95.6 70-130
04/28/23 05:21Toluene-d8 (S)100 70-130
LCS-V32558 LCSD-V32558Laboratory Control Sample & LCSD
LCSD
ResultParameter Max
RPD
LCSD
% Rec
LCS
%Rec
LCS
Result
Spike
Conc.Units
% Rec
Limits RPD
33.9 84.788.735.540.0µg/LAcetone 40-160 4.6 20.0
19.9 99.510220.420.0µg/LBenzene 70-130 2.4 20.0
20.1 10110721.420.0µg/LBromobenzene 70-130 6.2 20.0
19.8 99.010320.520.0µg/LBromochloromethane 70-130 3.4 20.0
19.1 95.510020.020.0µg/LBromodichloromethane 70-130 4.6 20.0
Page 9 of 19Date:05/02/2023 10:47 AM
Page 39 of 51
Quality Control Data
23-114-0018Report No:
Project Description:
Client ID:Geological Resources, Inc.
Express Food Mart
QC Prep Batch Method:
Volatile Organic Compounds - GC/MS
6200B
V32559QC Analytical Batch(es):
Analysis Method:
Analysis Description:
6200 PT
QC Prep:V32558
LCS-V32558 LCSD-V32558Laboratory Control Sample & LCSD
LCSD
ResultParameter Max
RPD
LCSD
% Rec
LCS
%Rec
LCS
Result
Spike
Conc.Units
% Rec
Limits RPD
18.3 91.592.018.420.0µg/LBromoform 70-130 0.5 20.0
19.8 99.097.019.420.0µg/LBromomethane 60-140 2.0 20.0
19.3 96.510120.220.0µg/Ln-Butylbenzene 70-130 4.5 20.0
19.2 96.010120.220.0µg/Lsec-Butyl benzene 70-130 5.0 20.0
19.2 96.010320.520.0µg/Ltert-Butyl benzene 70-130 6.5 20.0
19.2 96.099.019.820.0µg/LCarbon Tetrachloride 70-130 3.0 20.0
19.2 96.010120.220.0µg/LChlorobenzene 70-130 5.0 20.0
19.5 97.510220.420.0µg/LChlorodibromomethane 70-130 4.5 20.0
20.8 10411422.720.0µg/LChloroethane 60-140 8.7 20.0
19.6 98.010520.920.0µg/LChloroform 70-130 6.4 20.0
18.0 90.092.018.420.0µg/LChloromethane 60-140 2.1 20.0
19.6 98.010420.720.0µg/L2-Chlorotoluene 70-130 5.4 20.0
19.6 98.010320.520.0µg/L4-Chlorotoluene 70-130 4.4 20.0
19.0 95.098.519.720.0µg/LDi-Isopropyl Ether (DIPE)70-130 3.6 20.0
20.6 10395.019.020.0µg/L1,2-Dibromo-3-Chloropropane 70-130 8.0 20.0
19.9 99.510220.420.0µg/L1,2-Dibromoethane 70-130 2.4 20.0
19.2 96.010320.520.0µg/LDibromomethane 70-130 6.5 20.0
19.1 95.598.019.620.0µg/L1,2-Dichlorobenzene 70-130 2.5 20.0
19.7 98.510320.520.0µg/L1,3-Dichlorobenzene 70-130 3.9 20.0
19.0 95.010020.020.0µg/L1,4-Dichlorobenzene 70-130 5.1 20.0
17.7 88.587.517.520.0µg/LDichlorodifluoromethane 60-140 1.1 20.0
19.9 99.510420.820.0µg/L1,1-Dichloroethane 70-130 4.4 20.0
18.1 90.596.019.220.0µg/L1,2-Dichloroethane 70-130 5.8 20.0
19.4 97.010220.320.0µg/L1,1-Dichloroethene 70-130 4.5 20.0
19.6 98.010120.220.0µg/Lcis-1,2-Dichloroethene 70-130 3.0 20.0
19.8 99.010621.120.0µg/Ltrans-1,2-Dichloroethene 70-130 6.3 20.0
Page 10 of 19Date:05/02/2023 10:47 AM
Page 40 of 51
Quality Control Data
23-114-0018Report No:
Project Description:
Client ID:Geological Resources, Inc.
Express Food Mart
QC Prep Batch Method:
Volatile Organic Compounds - GC/MS
6200B
V32559QC Analytical Batch(es):
Analysis Method:
Analysis Description:
6200 PT
QC Prep:V32558
LCS-V32558 LCSD-V32558Laboratory Control Sample & LCSD
LCSD
ResultParameter Max
RPD
LCSD
% Rec
LCS
%Rec
LCS
Result
Spike
Conc.Units
% Rec
Limits RPD
20.0 10010420.720.0µg/L1,2-Dichloropropane 70-130 3.4 20.0
19.3 96.510220.420.0µg/L1,3-Dichloropropane 70-130 5.5 20.0
16.2 81.090.018.020.0µg/L2,2-Dichloropropane 70-130 10.5 20.0
21.0 10510921.720.0µg/L1,1-Dichloropropene 70-130 3.2 20.0
19.6 98.010020.020.0µg/Lcis-1,3-Dichloropropene 70-130 2.0 20.0
18.6 93.096.019.220.0µg/Ltrans-1,3-Dichloropropene 70-130 3.1 20.0
527 10594.6473500µg/LEthanol 60-140 10.8 20.0
19.4 97.010220.420.0µg/LEthylbenzene 70-130 5.0 20.0
19.1 95.594.518.920.0µg/LHexachlorobutadiene 70-130 1.0 20.0
17.6 88.097.019.420.0µg/L2-Hexanone 60-140 9.7 20.0
20.3 10210621.120.0µg/LIsopropylbenzene 70-130 3.8 20.0
19.9 99.510721.420.0µg/L4-Isopropyl toluene 70-130 7.2 20.0
16.4 82.088.017.620.0µg/LMethyl Ethyl Ketone (MEK)60-140 7.0 20.0
19.6 98.010220.320.0µg/LMethyl tert-butyl ether (MTBE)70-130 3.5 20.0
18.4 92.090.518.120.0µg/L4-Methyl-2-Pentanone 60-140 1.6 20.0
19.2 96.098.519.720.0µg/LMethylene Chloride 70-130 2.5 20.0
17.3 86.591.518.320.0µg/LNaphthalene 70-130 5.6 20.0
19.3 96.510420.720.0µg/Ln-Propylbenzene 70-130 7.0 20.0
19.5 97.510420.720.0µg/LStyrene 70-130 5.9 20.0
18.7 93.510320.520.0µg/L1,1,1,2-Tetrachloroethane 70-130 9.1 20.0
19.6 98.010420.820.0µg/L1,1,2,2-Tetrachloroethane 70-130 5.9 20.0
19.5 97.510320.520.0µg/LTetrachloroethene 70-130 5.0 20.0
19.4 97.010320.520.0µg/LToluene 70-130 5.5 20.0
20.6 10310921.720.0µg/L1,2,3-Trichlorobenzene 70-130 5.2 20.0
19.1 95.598.019.620.0µg/L1,2,4-Trichlorobenzene 70-130 2.5 20.0
18.6 93.010020.020.0µg/L1,1,1-Trichloroethane 70-130 7.2 20.0
Page 11 of 19Date:05/02/2023 10:47 AM
Page 41 of 51
Quality Control Data
23-114-0018Report No:
Project Description:
Client ID:Geological Resources, Inc.
Express Food Mart
QC Prep Batch Method:
Volatile Organic Compounds - GC/MS
6200B
V32559QC Analytical Batch(es):
Analysis Method:
Analysis Description:
6200 PT
QC Prep:V32558
LCS-V32558 LCSD-V32558Laboratory Control Sample & LCSD
LCSD
ResultParameter Max
RPD
LCSD
% Rec
LCS
%Rec
LCS
Result
Spike
Conc.Units
% Rec
Limits RPD
19.4 97.010320.520.0µg/L1,1,2-Trichloroethane 70-130 5.5 20.0
19.7 98.510320.520.0µg/LTrichloroethene 70-130 3.9 20.0
18.3 91.596.519.320.0µg/LTrichlorofluoromethane 60-140 5.3 20.0
19.3 96.599.519.920.0µg/L1,2,3-Trichloropropane 70-130 3.0 20.0
19.8 99.010320.520.0µg/L1,2,4-Trimethylbenzene 70-130 3.4 20.0
20.0 10010621.220.0µg/L1,3,5-Trimethylbenzene 70-130 5.8 20.0
19.0 95.010821.520.0µg/LVinyl Acetate 60-140 12.3 20.0
20.0 10010320.620.0µg/LVinyl Chloride 60-140 2.9 20.0
19.3 96.510220.420.0µg/Lo-Xylene 70-130 5.5 20.0
39.6 99.010441.640.0µg/Lm,p-Xylene 70-130 4.9 20.0
1001014-Bromofluorobenzene (S)70-130
98.498.6Dibromofluoromethane (S)70-130
95.697.21,2-Dichloroethane - d4 (S)70-130
101101Toluene-d8 (S)70-130
Page 12 of 19Date:05/02/2023 10:47 AM
Page 42 of 51
Quality Control Data
23-114-0018Report No:
Project Description:
Client ID:Geological Resources, Inc.
Express Food Mart
QC Prep Batch Method:
Volatile Organic Compounds - GC/MS
6200B
V32624QC Analytical Batch(es):
Analysis Method:
Analysis Description:
6200 PT
QC Prep:V32623
Associated Lab Samples: 94765, 94767
LRB-V32623 Matrix: AQULab Reagent Blank
Parameter
AnalyzedMQLMDLBlank
ResultUnits
%
Recovery
% Rec
Limits
04/28/23 14:1710.01.80<1.80µg/LAcetone
04/28/23 14:170.5000.180<0.180µg/LBenzene
04/28/23 14:170.5000.210<0.210µg/LBromobenzene
04/28/23 14:171.000.420<0.420µg/LBromochloromethane
04/28/23 14:170.5000.160<0.160µg/LBromodichloromethane
04/28/23 14:175.001.50<1.50µg/LBromoform
04/28/23 14:171.000.280<0.280µg/LBromomethane
04/28/23 14:170.5000.180<0.180µg/Ln-Butylbenzene
04/28/23 14:170.5000.200<0.200µg/Lsec-Butyl benzene
04/28/23 14:172.000.920<0.920µg/Ltert-Butyl benzene
04/28/23 14:170.5000.180<0.180µg/LCarbon Tetrachloride
04/28/23 14:170.5000.190<0.190µg/LChlorobenzene
04/28/23 14:170.5000.190<0.190µg/LChlorodibromomethane
04/28/23 14:171.000.430<0.430µg/LChloroethane
04/28/23 14:170.5000.220<0.220µg/LChloroform
04/28/23 14:170.5000.220<0.220µg/LChloromethane
04/28/23 14:170.5000.200<0.200µg/L2-Chlorotoluene
04/28/23 14:170.5000.200<0.200µg/L4-Chlorotoluene
04/28/23 14:170.5000.500<0.500µg/LDi-Isopropyl Ether (DIPE)
04/28/23 14:172.001.10<1.10µg/L1,2-Dibromo-3-Chloropropane
04/28/23 14:170.5000.200<0.200µg/L1,2-Dibromoethane
04/28/23 14:170.5000.230<0.230µg/LDibromomethane
04/28/23 14:170.5000.220<0.220µg/L1,2-Dichlorobenzene
04/28/23 14:170.5000.190<0.190µg/L1,3-Dichlorobenzene
04/28/23 14:170.5000.210<0.210µg/L1,4-Dichlorobenzene
04/28/23 14:175.001.20<1.20µg/LDichlorodifluoromethane
04/28/23 14:170.5000.240<0.240µg/L1,1-Dichloroethane
Page 13 of 19Date:05/02/2023 10:47 AM
Page 43 of 51
Quality Control Data
23-114-0018Report No:
Project Description:
Client ID:Geological Resources, Inc.
Express Food Mart
QC Prep Batch Method:
Volatile Organic Compounds - GC/MS
6200B
V32624QC Analytical Batch(es):
Analysis Method:
Analysis Description:
6200 PT
QC Prep:V32623
Associated Lab Samples: 94765, 94767
LRB-V32623 Matrix: AQULab Reagent Blank
Parameter
AnalyzedMQLMDLBlank
ResultUnits
%
Recovery
% Rec
Limits
04/28/23 14:170.5000.150<0.150µg/L1,2-Dichloroethane
04/28/23 14:170.5000.150<0.150µg/L1,1-Dichloroethene
04/28/23 14:170.5000.200<0.200µg/Lcis-1,2-Dichloroethene
04/28/23 14:170.5000.180<0.180µg/Ltrans-1,2-Dichloroethene
04/28/23 14:170.5000.190<0.190µg/L1,2-Dichloropropane
04/28/23 14:170.5000.130<0.130µg/L1,3-Dichloropropane
04/28/23 14:172.000.210<0.210µg/L2,2-Dichloropropane
04/28/23 14:170.5000.200<0.200µg/L1,1-Dichloropropene
04/28/23 14:170.5000.210<0.210µg/Lcis-1,3-Dichloropropene
04/28/23 14:170.5000.150<0.150µg/Ltrans-1,3-Dichloropropene
04/28/23 14:1720042.0<42.0µg/LEthanol
04/28/23 14:170.5000.170<0.170µg/LEthylbenzene
04/28/23 14:173.000.350<0.350µg/LHexachlorobutadiene
04/28/23 14:171.000.380<0.380µg/L2-Hexanone
04/28/23 14:170.5000.180<0.180µg/LIsopropylbenzene
04/28/23 14:170.5000.089<0.089µg/L4-Isopropyl toluene
04/28/23 14:175.000.710<0.710µg/LMethyl Ethyl Ketone (MEK)
04/28/23 14:171.000.140<0.140µg/LMethyl tert-butyl ether (MTBE)
04/28/23 14:171.000.078<0.078µg/L4-Methyl-2-Pentanone
04/28/23 14:172.000.330<0.330µg/LMethylene Chloride
04/28/23 14:171.000.470<0.470µg/LNaphthalene
04/28/23 14:170.5000.190<0.190µg/Ln-Propylbenzene
04/28/23 14:170.5000.220<0.220µg/LStyrene
04/28/23 14:170.5000.160<0.160µg/L1,1,1,2-Tetrachloroethane
04/28/23 14:170.5000.160<0.160µg/L1,1,2,2-Tetrachloroethane
04/28/23 14:170.5000.220<0.220µg/LTetrachloroethene
04/28/23 14:170.5000.220<0.220µg/LToluene
Page 14 of 19Date:05/02/2023 10:47 AM
Page 44 of 51
Quality Control Data
23-114-0018Report No:
Project Description:
Client ID:Geological Resources, Inc.
Express Food Mart
QC Prep Batch Method:
Volatile Organic Compounds - GC/MS
6200B
V32624QC Analytical Batch(es):
Analysis Method:
Analysis Description:
6200 PT
QC Prep:V32623
Associated Lab Samples: 94765, 94767
LRB-V32623 Matrix: AQULab Reagent Blank
Parameter
AnalyzedMQLMDLBlank
ResultUnits
%
Recovery
% Rec
Limits
04/28/23 14:170.5000.380<0.380µg/L1,2,3-Trichlorobenzene
04/28/23 14:170.5000.310<0.310µg/L1,2,4-Trichlorobenzene
04/28/23 14:170.5000.160<0.160µg/L1,1,1-Trichloroethane
04/28/23 14:170.5000.096<0.096µg/L1,1,2-Trichloroethane
04/28/23 14:170.5000.180<0.180µg/LTrichloroethene
04/28/23 14:170.5000.180<0.180µg/LTrichlorofluoromethane
04/28/23 14:170.5000.270<0.270µg/L1,2,3-Trichloropropane
04/28/23 14:170.5000.190<0.190µg/L1,2,4-Trimethylbenzene
04/28/23 14:170.5000.180<0.180µg/L1,3,5-Trimethylbenzene
04/28/23 14:175.001.00<1.00µg/LVinyl Acetate
04/28/23 14:170.5000.170<0.170µg/LVinyl Chloride
04/28/23 14:170.5000.210<0.210µg/Lo-Xylene
04/28/23 14:171.000.420<0.420µg/Lm,p-Xylene
04/28/23 14:174-Bromofluorobenzene (S)98.4 70-130
04/28/23 14:17Dibromofluoromethane (S)92.4 70-130
04/28/23 14:171,2-Dichloroethane - d4 (S)93.8 70-130
04/28/23 14:17Toluene-d8 (S)102 70-130
LCS-V32623 LCSD-V32623Laboratory Control Sample & LCSD
LCSD
ResultParameter Max
RPD
LCSD
% Rec
LCS
%Rec
LCS
Result
Spike
Conc.Units
% Rec
Limits RPD
19.9 49.746.018.440.0µg/LAcetone 40-160 7.8 20.0
15.5 77.580.516.120.0µg/LBenzene 70-130 3.7 20.0
15.9 79.582.016.420.0µg/LBromobenzene 70-130 3.0 20.0
15.1 75.581.516.320.0µg/LBromochloromethane 70-130 7.6 20.0
15.1 75.578.515.720.0µg/LBromodichloromethane 70-130 3.8 20.0
Page 15 of 19Date:05/02/2023 10:47 AM
Page 45 of 51
Quality Control Data
23-114-0018Report No:
Project Description:
Client ID:Geological Resources, Inc.
Express Food Mart
QC Prep Batch Method:
Volatile Organic Compounds - GC/MS
6200B
V32624QC Analytical Batch(es):
Analysis Method:
Analysis Description:
6200 PT
QC Prep:V32623
LCS-V32623 LCSD-V32623Laboratory Control Sample & LCSD
LCSD
ResultParameter Max
RPD
LCSD
% Rec
LCS
%Rec
LCS
Result
Spike
Conc.Units
% Rec
Limits RPD
15.5 77.576.515.320.0µg/LBromoform 70-130 1.2 20.0
18.2 91.082.516.520.0µg/LBromomethane 60-140 9.7 20.0
16.8 84.087.517.520.0µg/Ln-Butylbenzene 70-130 4.0 20.0
16.2 81.084.516.920.0µg/Lsec-Butyl benzene 70-130 4.2 20.0
16.2 81.085.017.020.0µg/Ltert-Butyl benzene 70-130 4.8 20.0
14.7 73.576.515.320.0µg/LCarbon Tetrachloride 70-130 4.0 20.0
16.0 80.083.516.720.0µg/LChlorobenzene 70-130 4.2 20.0
16.0 80.082.016.420.0µg/LChlorodibromomethane 70-130 2.4 20.0
18.5 92.594.518.920.0µg/LChloroethane 60-140 2.1 20.0
15.3 76.580.516.120.0µg/LChloroform 70-130 5.0 20.0
14.8 74.077.015.420.0µg/LChloromethane 60-140 3.9 20.0
16.0 80.082.516.520.0µg/L2-Chlorotoluene 70-130 3.0 20.0
16.0 80.084.516.920.0µg/L4-Chlorotoluene 70-130 5.4 20.0
15.2 76.080.016.020.0µg/LDi-Isopropyl Ether (DIPE)70-130 5.1 20.0
16.9 84.578.515.720.0µg/L1,2-Dibromo-3-Chloropropane 70-130 7.3 20.0
15.6 78.078.015.620.0µg/L1,2-Dibromoethane 70-130 0.0 20.0
14.8 74.074.514.920.0µg/LDibromomethane 70-130 0.6 20.0
16.4 82.084.016.820.0µg/L1,2-Dichlorobenzene 70-130 2.4 20.0
16.5 82.585.517.120.0µg/L1,3-Dichlorobenzene 70-130 3.5 20.0
16.3 81.584.016.820.0µg/L1,4-Dichlorobenzene 70-130 3.0 20.0
16.2 81.084.016.820.0µg/LDichlorodifluoromethane 60-140 3.6 20.0
15.7 78.582.016.420.0µg/L1,1-Dichloroethane 70-130 4.3 20.0
14.7 73.576.515.320.0µg/L1,2-Dichloroethane 70-130 4.0 20.0
16.1 80.583.016.620.0µg/L1,1-Dichloroethene 70-130 3.0 20.0
15.4 77.080.016.020.0µg/Lcis-1,2-Dichloroethene 70-130 3.8 20.0
15.7 78.583.516.720.0µg/Ltrans-1,2-Dichloroethene 70-130 6.1 20.0
Page 16 of 19Date:05/02/2023 10:47 AM
Page 46 of 51
Quality Control Data
23-114-0018Report No:
Project Description:
Client ID:Geological Resources, Inc.
Express Food Mart
QC Prep Batch Method:
Volatile Organic Compounds - GC/MS
6200B
V32624QC Analytical Batch(es):
Analysis Method:
Analysis Description:
6200 PT
QC Prep:V32623
LCS-V32623 LCSD-V32623Laboratory Control Sample & LCSD
LCSD
ResultParameter Max
RPD
LCSD
% Rec
LCS
%Rec
LCS
Result
Spike
Conc.Units
% Rec
Limits RPD
15.7 78.580.016.020.0µg/L1,2-Dichloropropane 70-130 1.8 20.0
15.2 76.079.015.820.0µg/L1,3-Dichloropropane 70-130 3.8 20.0
16.1 80.584.516.920.0µg/L2,2-Dichloropropane 70-130 4.8 20.0
16.0 80.083.016.620.0µg/L1,1-Dichloropropene 70-130 3.6 20.0
14.9 74.579.015.820.0µg/Lcis-1,3-Dichloropropene 70-130 5.8 20.0
14.8 74.076.515.320.0µg/Ltrans-1,3-Dichloropropene 70-130 3.3 20.0
389 77.870.2351500µg/LEthanol 60-140 10.2 20.0
15.9 79.582.516.520.0µg/LEthylbenzene 70-130 3.7 20.0
17.0 85.086.517.320.0µg/LHexachlorobutadiene 70-130 1.7 20.0
13.8 69.060.512.120.0µg/L2-Hexanone 60-140 13.1 20.0
16.8 84.087.017.420.0µg/LIsopropylbenzene 70-130 3.5 20.0
16.8 84.086.017.220.0µg/L4-Isopropyl toluene 70-130 2.3 20.0
18.7 93.586.017.220.0µg/LMethyl Ethyl Ketone (MEK)60-140 8.3 20.0
15.6 78.078.515.720.0µg/LMethyl tert-butyl ether (MTBE)70-130 0.6 20.0
14.2 71.064.012.820.0µg/L4-Methyl-2-Pentanone 60-140 10.3 20.0
13.1 65.5*70.014.020.0µg/LMethylene Chloride 70-130 6.6 20.0
16.4 82.079.015.820.0µg/LNaphthalene 70-130 3.7 20.0
16.4 82.086.017.220.0µg/Ln-Propylbenzene 70-130 4.7 20.0
15.7 78.581.516.320.0µg/LStyrene 70-130 3.7 20.0
16.1 80.583.016.620.0µg/L1,1,1,2-Tetrachloroethane 70-130 3.0 20.0
15.7 78.575.015.020.0µg/L1,1,2,2-Tetrachloroethane 70-130 4.5 20.0
16.7 83.589.017.820.0µg/LTetrachloroethene 70-130 6.3 20.0
15.3 76.581.016.220.0µg/LToluene 70-130 5.7 20.0
17.8 89.091.018.220.0µg/L1,2,3-Trichlorobenzene 70-130 2.2 20.0
17.2 86.090.018.020.0µg/L1,2,4-Trichlorobenzene 70-130 4.5 20.0
15.4 77.080.016.020.0µg/L1,1,1-Trichloroethane 70-130 3.8 20.0
Page 17 of 19* QC Fail Date:05/02/2023 10:47 AM
Page 47 of 51
Quality Control Data
23-114-0018Report No:
Project Description:
Client ID:Geological Resources, Inc.
Express Food Mart
QC Prep Batch Method:
Volatile Organic Compounds - GC/MS
6200B
V32624QC Analytical Batch(es):
Analysis Method:
Analysis Description:
6200 PT
QC Prep:V32623
LCS-V32623 LCSD-V32623Laboratory Control Sample & LCSD
LCSD
ResultParameter Max
RPD
LCSD
% Rec
LCS
%Rec
LCS
Result
Spike
Conc.Units
% Rec
Limits RPD
15.4 77.076.015.220.0µg/L1,1,2-Trichloroethane 70-130 1.3 20.0
16.0 80.083.016.620.0µg/LTrichloroethene 70-130 3.6 20.0
17.4 87.089.517.920.0µg/LTrichlorofluoromethane 60-140 2.8 20.0
16.1 80.575.015.020.0µg/L1,2,3-Trichloropropane 70-130 7.0 20.0
16.5 82.586.017.220.0µg/L1,2,4-Trimethylbenzene 70-130 4.1 20.0
16.5 82.585.517.120.0µg/L1,3,5-Trimethylbenzene 70-130 3.5 20.0
15.7 78.578.015.620.0µg/LVinyl Acetate 60-140 0.6 20.0
16.3 81.584.516.920.0µg/LVinyl Chloride 60-140 3.6 20.0
15.9 79.584.516.920.0µg/Lo-Xylene 70-130 6.0 20.0
33.1 82.787.535.040.0µg/Lm,p-Xylene 70-130 5.5 20.0
97.898.04-Bromofluorobenzene (S)70-130
94.895.2Dibromofluoromethane (S)70-130
96.695.61,2-Dichloroethane - d4 (S)70-130
100101Toluene-d8 (S)70-130
Page 18 of 19Date:05/02/2023 10:47 AM
Page 48 of 51
Quality Control Data
23-114-0018Report No:
Project Description:
Client ID:Geological Resources, Inc.
Express Food Mart
QC Prep Batch Method:
EDB and DBCP by Microextraction GC/ECD
EPA-504.1
V32508QC Analytical Batch(es):
Analysis Method:
Analysis Description:
EPA-504.1(PREP)
QC Prep:V32463
Associated Lab Samples: 94769
LRB-V32463 Matrix: AQULab Reagent Blank
Parameter
AnalyzedMQLBlank
ResultUnits
04/27/23 11:390.0200< 0.0200µg/L1,2-Dibromoethane
LCS-V32463 LCSD-V32463Laboratory Control Sample & LCSD
LCSD
ResultParameter Max
RPD
LCSD
% Rec
LCS
%Rec
LCS
Result
Spike
Conc.Units
% Rec
Limits RPD
0.425 170*139*0.3480.250µg/L1,2-Dibromoethane 70-130 19.9 20.0
V 94769-DUP-V32463Duplicate
Max RPD
Parameter
AnalyzedRPDDUP
Result
Result
Units
20.0 04/27/23 12:57182*0.430< 0.0208µg/L1,2-Dibromoethane
Page 19 of 19* QC Fail Date:05/02/2023 10:47 AM
Page 49 of 51