WS-4034_13501_CA_HRE_20230110_HRE Request-SW-3190

January 10, 2023 MEMORANDUM TO: Dave Lilley, Environmental Toxicologist, Division of Waste Management, 1646 Mail Service Center, Raleigh, NC 27699-1646 (FAX [phone]) FROM: Linda Estkowski, Winston-Salem Regional Office, UST Section SUBJECT: Request for Health Risk Evaluation of Water Supply Tracking ID: 13501
Enclosed please find the analytical results for a water sample collected on February 2, 2022 from the L.W. & Rosa Bowes water supply well, identified as SW-3190, located at 3190 NC Hwy 119 N., Leasburg, NC 27291, Caswell County. Please perform a health risk evaluation and send the evaluations with your
recommendations and a copy of this memo to me. I will then forward the health risk evaluations and recommendations 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): Analytical Results cc: WSRO

,
REPORT OF ANALYSISReport Number :
Project
Information :
NC 27416-0265
22-035-0043
01168
Pyramid Environmental, Inc
PO Box 16265
Mika Trifunovic
Greensboro
Received : 02/04/2022
Ashby's Grocery
Report Date : 02/14/2022
Sample ID :
Lab No :
Sampled:SW-3190
93566 Matrix:
2/2/2022 15:00
Aqueous
Analytical Method:
Prep Method:
Test Results Units MDL MQL By Analytical
Batch
Date / Time
Analyzed
DF
6200 PT
6200B Prep Batch(es):V14847 02/10/22 09:00
<1.80 µg/L 1.80 10.0Acetone 1 02/10/22 16:02 V14848JLB
<0.180 µg/L 0.180 0.500Benzene 1 02/10/22 16:02 V14848JLB
<0.210 µg/L 0.210 0.500Bromobenzene 1 02/10/22 16:02 V14848JLB
<0.420 µg/L 0.420 1.00Bromochloromethane 1 02/10/22 16:02 V14848JLB
<0.160 µg/L 0.160 0.500Bromodichloromethane 1 02/10/22 16:02 V14848JLB
<1.50 µg/L 1.50 5.00Bromoform 1 02/10/22 16:02 V14848JLB
<0.280 µg/L 0.280 1.00Bromomethane 1 02/10/22 16:02 V14848JLB
<0.180 µg/L 0.180 0.500n-Butylbenzene 1 02/10/22 16:02 V14848JLB
<0.200 µg/L 0.200 0.500
sec-Butyl benzene 1 02/10/22 16:02 V14848JLB
<0.920 µg/L 0.920 2.00tert-Butyl benzene 1 02/10/22 16:02 V14848JLB
<0.180 µg/L 0.180 0.500Carbon Tetrachloride 1 02/10/22 16:02 V14848JLB
<0.190 µg/L 0.190 0.500Chlorobenzene 1 02/10/22 16:02 V14848JLB
<0.190 µg/L 0.190 0.500Chlorodibromomethane 1 02/10/22 16:02 V14848JLB
<0.430 µg/L 0.430 1.00Chloroethane 1 02/10/22 16:02 V14848JLB
<0.220 µg/L 0.220 0.500Chloroform 1 02/10/22 16:02 V14848JLB
<0.220 µg/L 0.220 0.500
Chloromethane 1 02/10/22 16:02 V14848JLB
<0.200 µg/L 0.200 0.5002-Chlorotoluene 1 02/10/22 16:02 V14848JLB
<0.200 µg/L 0.200 0.5004-Chlorotoluene 1 02/10/22 16:02 V14848JLB
<0.500 µg/L 0.500 0.500Di-Isopropyl Ether (DIPE)1 02/10/22 16:02 V14848JLB
<1.10 µg/L 1.10 2.001,2-Dibromo-3-Chloropropane 1 02/10/22 16:02 V14848JLB
<0.200 µg/L 0.200 0.5001,2-Dibromoethane 1 02/10/22 16:02 V14848JLB
<0.230 µg/L 0.230 0.500Dibromomethane 1 02/10/22 16:02 V14848JLB
Qualifiers/
Definitions
Estimated valueJDilution FactorDF
Method Quantitation LimitMQL
Page 70 of 90
,
REPORT OF ANALYSISReport Number :
Project
Information :
NC 27416-0265
22-035-0043
01168
Pyramid Environmental, Inc
PO Box 16265
Mika Trifunovic
Greensboro
Received : 02/04/2022
Ashby's Grocery
Report Date : 02/14/2022
Sample ID :
Lab No :
Sampled:SW-3190
93566 Matrix:
2/2/2022 15:00
Aqueous
Analytical Method:
Prep Method:
Test Results Units MDL MQL By Analytical
Batch
Date / Time
Analyzed
DF
6200 PT
6200B Prep Batch(es):V14847 02/10/22 09:00
<0.220 µg/L 0.220 0.5001,2-Dichlorobenzene 1 02/10/22 16:02 V14848JLB
<0.190 µg/L 0.190 0.5001,3-Dichlorobenzene 1 02/10/22 16:02 V14848JLB
<0.210 µg/L 0.210 0.5001,4-Dichlorobenzene 1 02/10/22 16:02 V14848JLB
<1.20 µg/L 1.20 5.00Dichlorodifluoromethane 1 02/10/22 16:02 V14848JLB
<0.240 µg/L 0.240 0.5001,1-Dichloroethane 1 02/10/22 16:02 V14848JLB
<0.150 µg/L 0.150 0.5001,2-Dichloroethane 1 02/10/22 16:02 V14848JLB
<0.150 µg/L 0.150 0.5001,1-Dichloroethene 1 02/10/22 16:02 V14848JLB
<0.200 µg/L 0.200 0.500cis-1,2-Dichloroethene 1 02/10/22 16:02 V14848JLB
<0.180 µg/L 0.180 0.500
trans-1,2-Dichloroethene 1 02/10/22 16:02 V14848JLB
<0.190 µg/L 0.190 0.5001,2-Dichloropropane 1 02/10/22 16:02 V14848JLB
<0.130 µg/L 0.130 0.5001,3-Dichloropropane 1 02/10/22 16:02 V14848JLB
<0.210 µg/L 0.210 2.002,2-Dichloropropane 1 02/10/22 16:02 V14848JLB
<0.200 µg/L 0.200 0.5001,1-Dichloropropene 1 02/10/22 16:02 V14848JLB
<0.210 µg/L 0.210 0.500cis-1,3-Dichloropropene 1 02/10/22 16:02 V14848JLB
<0.150 µg/L 0.150 0.500trans-1,3-Dichloropropene 1 02/10/22 16:02 V14848JLB
<42.0 µg/L 42.0 200
Ethanol 1 02/10/22 16:02 V14848JLB
<0.170 µg/L 0.170 0.500Ethylbenzene 1 02/10/22 16:02 V14848JLB
<0.059 µg/L 0.059 10.0Ethyl Tertiary Butyl Ether (ETBE)1 02/10/22 16:02 V14848JLB
<0.350 µg/L 0.350 3.00Hexachlorobutadiene 1 02/10/22 16:02 V14848JLB
<0.380 µg/L 0.380 1.002-Hexanone 1 02/10/22 16:02 V14848JLB
<0.180 µg/L 0.180 0.500Isopropylbenzene 1 02/10/22 16:02 V14848JLB
<0.089 µg/L 0.089 0.5004-Isopropyl toluene 1 02/10/22 16:02 V14848JLB
Qualifiers/
Definitions
Estimated valueJDilution FactorDF
Method Quantitation LimitMQL
Page 71 of 90
,
REPORT OF ANALYSISReport Number :
Project
Information :
NC 27416-0265
22-035-0043
01168
Pyramid Environmental, Inc
PO Box 16265
Mika Trifunovic
Greensboro
Received : 02/04/2022
Ashby's Grocery
Report Date : 02/14/2022
Sample ID :
Lab No :
Sampled:SW-3190
93566 Matrix:
2/2/2022 15:00
Aqueous
Analytical Method:
Prep Method:
Test Results Units MDL MQL By Analytical
Batch
Date / Time
Analyzed
DF
6200 PT
6200B Prep Batch(es):V14847 02/10/22 09:00
<0.710 µg/L 0.710 5.00Methyl Ethyl Ketone (MEK)1 02/10/22 16:02 V14848JLB
1.66 µg/L 0.140 1.00Methyl tert-butyl ether (MTBE)1 02/10/22 16:02 V14848JLB
<0.078 µg/L 0.078 1.004-Methyl-2-Pentanone 1 02/10/22 16:02 V14848JLB
<0.330 µg/L 0.330 2.00Methylene Chloride 1 02/10/22 16:02 V14848JLB
<0.470 µg/L 0.470 1.00Naphthalene 1 02/10/22 16:02 V14848JLB
<0.190 µg/L 0.190 0.500n-Propylbenzene 1 02/10/22 16:02 V14848JLB
<0.220 µg/L 0.220 0.500Styrene 1 02/10/22 16:02 V14848JLB
<1.60 µg/L 1.60 10.0tert-Butyl Alcohol (TBA)1 02/10/22 16:02 V14848JLB
<0.350 µg/L 0.350 10.0
tert-Butyl formate (TBF)1 02/10/22 16:02 V14848JLB
<1.90 µg/L 1.90 10.0tert-Amyl Alcohol (TAA)1 02/10/22 16:02 V14848JLB
<0.280 µg/L 0.280 10.0tert-Amyl Methyl Ether (TAME)1 02/10/22 16:02 V14848JLB
<0.160 µg/L 0.160 0.5001,1,1,2-Tetrachloroethane 1 02/10/22 16:02 V14848JLB
<0.160 µg/L 0.160 0.5001,1,2,2-Tetrachloroethane 1 02/10/22 16:02 V14848JLB
<0.220 µg/L 0.220 0.500Tetrachloroethene 1 02/10/22 16:02 V14848JLB
<0.220 µg/L 0.220 0.500Toluene 1 02/10/22 16:02 V14848JLB
<0.380 µg/L 0.380 0.500
1,2,3-Trichlorobenzene 1 02/10/22 16:02 V14848JLB
<0.310 µg/L 0.310 0.5001,2,4-Trichlorobenzene 1 02/10/22 16:02 V14848JLB
<0.160 µg/L 0.160 0.5001,1,1-Trichloroethane 1 02/10/22 16:02 V14848JLB
<0.096 µg/L 0.096 0.5001,1,2-Trichloroethane 1 02/10/22 16:02 V14848JLB
<0.180 µg/L 0.180 0.500Trichloroethene 1 02/10/22 16:02 V14848JLB
<0.180 µg/L 0.180 0.500Trichlorofluoromethane 1 02/10/22 16:02 V14848JLB
<0.270 µg/L 0.270 0.5001,2,3-Trichloropropane 1 02/10/22 16:02 V14848JLB
Qualifiers/
Definitions
Estimated valueJDilution FactorDF
Method Quantitation LimitMQL
Page 72 of 90
,
REPORT OF ANALYSISReport Number :
Project
Information :
NC 27416-0265
22-035-0043
01168
Pyramid Environmental, Inc
PO Box 16265
Mika Trifunovic
Greensboro
Received : 02/04/2022
Ashby's Grocery
Report Date : 02/14/2022
Sample ID :
Lab No :
Sampled:SW-3190
93566 Matrix:
2/2/2022 15:00
Aqueous
Analytical Method:
Prep Method:
Test Results Units MDL MQL By Analytical
Batch
Date / Time
Analyzed
DF
6200 PT
6200B Prep Batch(es):V14847 02/10/22 09:00
<0.190 µg/L 0.190 0.5001,2,4-Trimethylbenzene 1 02/10/22 16:02 V14848JLB
<0.180 µg/L 0.180 0.5001,3,5-Trimethylbenzene 1 02/10/22 16:02 V14848JLB
<1.00 µg/L 1.00 5.00Vinyl Acetate 1 02/10/22 16:02 V14848JLB
<0.170 µg/L 0.170 0.500Vinyl Chloride 1 02/10/22 16:02 V14848JLB
<0.210 µg/L 0.210 0.500o-Xylene 1 02/10/22 16:02 V14848JLB
<0.420 µg/L 0.420 1.00m,p-Xylene 1 02/10/22 16:02 V14848JLB
<0.21 µg/L 0.210 0.500Xylene (Total)1 02/10/22 16:02 V14848
Surrogate: 4-Bromofluorobenzene 90.4 Limits: 70-130%02/10/22 16:021 JLB V14848
Surrogate: Dibromofluoromethane 83.0 Limits: 70-130%02/10/22 16:021 JLB V14848
Surrogate: 1,2-Dichloroethane - d4 73.2 Limits: 70-130%02/10/22 16:021 JLB V14848
Surrogate: Toluene-d8 90.8 Limits: 70-130%02/10/22 16:021 JLB V14848
Qualifiers/
Definitions
Estimated valueJDilution FactorDF
Method Quantitation LimitMQL
Page 73 of 90