MO-2489_3898_G_WSW_20230127_LITTLEHRE

January 27, 2023 Willene and Sharon Little P.O. Box 117 Denver, NC 28037 Re: Health Risk Evaluation of Water Supply
Incident Number: 3898 Dear Ms. Little and Ms. Little: Please find attached the Sample Analytical Results for a water sample collected from your well, identified as WSW-Little, located at 5683 East NC Highway 150, Denver, Catawba County, January 10,
2023. The sample was collected and analyzed as part of the investigation of a petroleum release in the vicinity. The water sample was analyzed for specific target analytes (contaminants), which are listed on the attached Sample Analytical Results. Contaminants were detected in the water sample, as shown on the attached Sample Analytical Results. Because contaminants were detected in the water sample, a Health Risk Evaluation of the water
supply was requested from an environmental toxicologist in the Division of Waste Management. The Health Risk Evaluation has been attached. If you have any questions, please contact me at the address or telephone number listed below. Sincerely, Brad C. Newton, P.G.
Hydrogeologist Mooresville Regional Office UST Section, Division of Waste Management, NCDEQ
Attachments: Little Sample Analytical Results Health Risk Evaluation
cc: KB’s Auto Mobile Detailing – 5683 NC Highway 150 E Denver, NC 28037 Catawba County Health Department County Manager, Catawba County

January 27, 2023
TO: Brad Newton
Mooresville Regional Office NC UST Section RE: Health Risk Evaluation
Incident # 3898 Little Well Sampling Results 5683 East NC Highway 150 Denver, NC

During this sampling event, three contaminants were detected in the well water. The standards used to determine if the water is suitable for drinking and cooking are the United States Environmental Protection Agency’s Maximum Contaminant Levels (MCLs) or, if no MCLs exist, North Carolina Groundwater Standards (2L).

If any contaminant concentrations exceed applicable standards for using the water for drinking and cooking, those contaminant concentrations are further analyzed to determine if the water is suitable for other household uses, such as showering, bathing, washing dishes, flushing toilets, and hand washing. The chart below compares the detected contaminant concentrations with the applicable
standards:
Sample ID Contaminant Concentration (µg/L) MCL (µg/L) 2L (µg/L)
97291 Benzene 0.228 5
Chloroform 0.978 80*
Di-Isopropyl Ether 1.06 70
µg/L – Stands for micrograms of contaminant per liter of water and is roughly equivalent to parts per
billion. * As total trihalomethanes. RECOMMENDATION: None of the contaminants detected exceeded the applicable water
standards. Therefore, no restrictions on the use of this water are recommended at this time.
David Lilley, Environmental Toxicologist
Division of Waste Management, NCDEQ
,
REPORT OF ANALYSISReport Number :
Project
Information :
NC 28110
23-011-0101
00087
Geological Resources, Inc.
3502 Hayes Road
Scott Ball
Monroe
Danyale Love
Project Manager
GRI # 2899 Received : 01/11/2023
Express Food Mart
Report Date : 01/19/2023
Sample ID :
Lab No :
Sampled:Little WSW
97291 Matrix:
1/10/2023 10:56
Aqueous
Analytical Method:
Prep Method:
Test Results Units MDL MQL By Analytical
Batch
Date / Time
Analyzed
DF
6200 PT
6200B Prep Batch(es):V29020 01/18/23 14:00
<1.80 µg/L 1.80 10.0Acetone 1 01/19/23 05:39 V29021MSA
0.228 J µg/L 0.180 0.500Benzene 1 01/19/23 05:39 V29021MSA
<0.210 µg/L 0.210 0.500Bromobenzene 1 01/19/23 05:39 V29021MSA
<0.420 µg/L 0.420 1.00Bromochloromethane 1 01/19/23 05:39 V29021MSA
<0.160 µg/L 0.160 0.500Bromodichloromethane 1 01/19/23 05:39 V29021MSA
<1.50 µg/L 1.50 5.00Bromoform 1 01/19/23 05:39 V29021MSA
<0.280 µg/L 0.280 1.00Bromomethane 1 01/19/23 05:39 V29021MSA
<0.180 µg/L 0.180 0.500n-Butylbenzene 1 01/19/23 05:39 V29021MSA
<0.200 µg/L 0.200 0.500sec-Butyl benzene 1 01/19/23 05:39 V29021MSA
<0.920 µg/L 0.920 2.00tert-Butyl benzene 1 01/19/23 05:39 V29021MSA
<0.180 µg/L 0.180 0.500Carbon Tetrachloride 1 01/19/23 05:39 V29021MSA
<0.190 µg/L 0.190 0.500Chlorobenzene 1 01/19/23 05:39 V29021MSA
<0.190 µg/L 0.190 0.500Chlorodibromomethane 1 01/19/23 05:39 V29021MSA
<0.430 µg/L 0.430 1.00Chloroethane 1 01/19/23 05:39 V29021MSA
0.978 µg/L 0.220 0.500Chloroform 1 01/19/23 05:39 V29021MSA
<0.220 µg/L 0.220 0.500Chloromethane 1 01/19/23 05:39 V29021MSA
<0.200 µg/L 0.200 0.5002-Chlorotoluene 1 01/19/23 05:39 V29021MSA
<0.200 µg/L 0.200 0.5004-Chlorotoluene 1 01/19/23 05:39 V29021MSA
1.06 µg/L 0.500 0.500Di-Isopropyl Ether (DIPE)1 01/19/23 05:39 V29021MSA
<1.10 µg/L 1.10 2.001,2-Dibromo-3-Chloropropane 1 01/19/23 05:39 V29021MSA
<0.230 µg/L 0.230 0.500Dibromomethane 1 01/19/23 05:39 V29021MSA
<0.220 µg/L 0.220 0.5001,2-Dichlorobenzene 1 01/19/23 05:39 V29021MSA
<0.190 µg/L 0.190 0.5001,3-Dichlorobenzene 1 01/19/23 05:39 V29021MSA
Qualifiers/
Definitions
Estimated valueJDilution FactorDF
Method Quantitation LimitMQL
Page 6 of 22
,
REPORT OF ANALYSISReport Number :
Project
Information :
NC 28110
23-011-0101
00087
Geological Resources, Inc.
3502 Hayes Road
Scott Ball
Monroe
Danyale Love
Project Manager
GRI # 2899 Received : 01/11/2023
Express Food Mart
Report Date : 01/19/2023
Sample ID :
Lab No :
Sampled:Little WSW
97291 Matrix:
1/10/2023 10:56
Aqueous
Analytical Method:
Prep Method:
Test Results Units MDL MQL By Analytical
Batch
Date / Time
Analyzed
DF
6200 PT
6200B Prep Batch(es):V29020 01/18/23 14:00
<0.210 µg/L 0.210 0.5001,4-Dichlorobenzene 1 01/19/23 05:39 V29021MSA
<1.20 µg/L 1.20 5.00Dichlorodifluoromethane 1 01/19/23 05:39 V29021MSA
<0.240 µg/L 0.240 0.5001,1-Dichloroethane 1 01/19/23 05:39 V29021MSA
<0.150 µg/L 0.150 0.5001,2-Dichloroethane 1 01/19/23 05:39 V29021MSA
<0.150 µg/L 0.150 0.5001,1-Dichloroethene 1 01/19/23 05:39 V29021MSA
<0.200 µg/L 0.200 0.500cis-1,2-Dichloroethene 1 01/19/23 05:39 V29021MSA
<0.180 µg/L 0.180 0.500trans-1,2-Dichloroethene 1 01/19/23 05:39 V29021MSA
<0.190 µg/L 0.190 0.5001,2-Dichloropropane 1 01/19/23 05:39 V29021MSA
<0.130 µg/L 0.130 0.5001,3-Dichloropropane 1 01/19/23 05:39 V29021MSA
<0.210 µg/L 0.210 2.002,2-Dichloropropane 1 01/19/23 05:39 V29021MSA
<0.200 µg/L 0.200 0.5001,1-Dichloropropene 1 01/19/23 05:39 V29021MSA
<0.210 µg/L 0.210 0.500cis-1,3-Dichloropropene 1 01/19/23 05:39 V29021MSA
<0.150 µg/L 0.150 0.500trans-1,3-Dichloropropene 1 01/19/23 05:39 V29021MSA
<42.0 µg/L 42.0 200Ethanol 1 01/19/23 05:39 V29021MSA
<0.170 µg/L 0.170 0.500Ethylbenzene 1 01/19/23 05:39 V29021MSA
<0.350 µg/L 0.350 3.00Hexachlorobutadiene 1 01/19/23 05:39 V29021MSA
<0.380 µg/L 0.380 1.002-Hexanone 1 01/19/23 05:39 V29021MSA
<0.180 µg/L 0.180 0.500Isopropylbenzene 1 01/19/23 05:39 V29021MSA
<0.089 µg/L 0.089 0.5004-Isopropyl toluene 1 01/19/23 05:39 V29021MSA
<0.710 µg/L 0.710 5.00Methyl Ethyl Ketone (MEK)1 01/19/23 05:39 V29021MSA
<0.140 µg/L 0.140 1.00Methyl tert-butyl ether (MTBE)1 01/19/23 05:39 V29021MSA
<0.078 µg/L 0.078 1.004-Methyl-2-Pentanone 1 01/19/23 05:39 V29021MSA
<0.330 µg/L 0.330 2.00Methylene Chloride 1 01/19/23 05:39 V29021MSA
Qualifiers/
Definitions
Estimated valueJDilution FactorDF
Method Quantitation LimitMQL
Page 7 of 22
,
REPORT OF ANALYSISReport Number :
Project
Information :
NC 28110
23-011-0101
00087
Geological Resources, Inc.
3502 Hayes Road
Scott Ball
Monroe
Danyale Love
Project Manager
GRI # 2899 Received : 01/11/2023
Express Food Mart
Report Date : 01/19/2023
Sample ID :
Lab No :
Sampled:Little WSW
97291 Matrix:
1/10/2023 10:56
Aqueous
Analytical Method:
Prep Method:
Test Results Units MDL MQL By Analytical
Batch
Date / Time
Analyzed
DF
6200 PT
6200B Prep Batch(es):V29020 01/18/23 14:00
<0.470 µg/L 0.470 1.00Naphthalene 1 01/19/23 05:39 V29021MSA
<0.190 µg/L 0.190 0.500n-Propylbenzene 1 01/19/23 05:39 V29021MSA
<0.220 µg/L 0.220 0.500Styrene 1 01/19/23 05:39 V29021MSA
<0.160 µg/L 0.160 0.5001,1,1,2-Tetrachloroethane 1 01/19/23 05:39 V29021MSA
<0.160 µg/L 0.160 0.5001,1,2,2-Tetrachloroethane 1 01/19/23 05:39 V29021MSA
<0.220 µg/L 0.220 0.500Tetrachloroethene 1 01/19/23 05:39 V29021MSA
<0.220 µg/L 0.220 0.500Toluene 1 01/19/23 05:39 V29021MSA
<0.380 µg/L 0.380 0.5001,2,3-Trichlorobenzene 1 01/19/23 05:39 V29021MSA
<0.310 µg/L 0.310 0.5001,2,4-Trichlorobenzene 1 01/19/23 05:39 V29021MSA
<0.160 µg/L 0.160 0.5001,1,1-Trichloroethane 1 01/19/23 05:39 V29021MSA
<0.096 µg/L 0.096 0.5001,1,2-Trichloroethane 1 01/19/23 05:39 V29021MSA
<0.180 µg/L 0.180 0.500Trichloroethene 1 01/19/23 05:39 V29021MSA
<0.180 µg/L 0.180 0.500Trichlorofluoromethane 1 01/19/23 05:39 V29021MSA
<0.270 µg/L 0.270 0.5001,2,3-Trichloropropane 1 01/19/23 05:39 V29021MSA
<0.190 µg/L 0.190 0.5001,2,4-Trimethylbenzene 1 01/19/23 05:39 V29021MSA
<0.180 µg/L 0.180 0.5001,3,5-Trimethylbenzene 1 01/19/23 05:39 V29021MSA
<1.00 µg/L 1.00 5.00Vinyl Acetate 1 01/19/23 05:39 V29021MSA
<0.170 µg/L 0.170 0.500Vinyl Chloride 1 01/19/23 05:39 V29021MSA
<0.210 µg/L 0.210 0.500o-Xylene 1 01/19/23 05:39 V29021MSA
<0.420 µg/L 0.420 1.00m,p-Xylene 1 01/19/23 05:39 V29021MSA
Qualifiers/
Definitions
Estimated valueJDilution FactorDF
Method Quantitation LimitMQL
Page 8 of 22
,
REPORT OF ANALYSISReport Number :
Project
Information :
NC 28110
23-011-0101
00087
Geological Resources, Inc.
3502 Hayes Road
Scott Ball
Monroe
Danyale Love
Project Manager
GRI # 2899 Received : 01/11/2023
Express Food Mart
Report Date : 01/19/2023
Sample ID :
Lab No :
Sampled:Little WSW
97291 Matrix:
1/10/2023 10:56
Aqueous
Analytical Method:
Prep Method:
Test Results Units MDL MQL By Analytical
Batch
Date / Time
Analyzed
DF
6200 PT
6200B Prep Batch(es):V29020 01/18/23 14:00
<0.21 µg/L 0.210 0.500Xylene (Total)1 01/19/23 05:39 V29021
Surrogate: 4-Bromofluorobenzene 104 Limits: 70-130%01/19/23 05:391 MSA V29021
Surrogate: Dibromofluoromethane 94.2 Limits: 70-130%01/19/23 05:391 MSA V29021
Surrogate: 1,2-Dichloroethane - d4 96.2 Limits: 70-130%01/19/23 05:391 MSA V29021
Surrogate: Toluene-d8 98.6 Limits: 70-130%01/19/23 05:391 MSA V29021
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):V28888 01/16/23 09:30
<0.00333 µg/L 0.00333 0.02021,2-Dibromoethane 1 01/16/23 12:19 V28908AMP
Qualifiers/
Definitions
Estimated valueJDilution FactorDF
Method Quantitation LimitMQL
Page 9 of 22