FA-7838_42105_CA_RPTS_20191217

2725 East Millbrook Road
Suite 121
Raleigh, NC 27604
Tel: [phone]
Fax: [phone]
www.atcgroupservices.com
N.C. Engineering License No. C-1598

December 17, 2019

Mr. Mark Petermann
North Carolina Department of Environmental Quality
Division of Waste Management – Underground Storage Tank Section
1646 Mail Service Center
Raleigh, North Carolina 27699-1646

Re: Groundwater Monitoring Letter Report
7532 US Highway 421
Lillington, Harnett County, North Carolina
NCDEQ Incident No. 42105
ATC Project No. SLP4210507

Dear Mr. Petermann:

ATC Associates of North Carolina, P.C. (ATC) is pleased to submit the results of a groundwater
sampling event conducted on October 28, 2019, at the 7532 US Highway 421 in Lillington,
Harnett, North Carolina. A site topographic map is included as Figure 1. Currently on-site is a
single-story building occupied by Airmedics Heating & Cooling. A site map is included as Figure
2. The sampling event was performed based on a September 27, 2019, Task Authorization (TA-
07) by the Trust Fund Branch of the Underground Storage Tank (UST) Section, North Carolina
Department of Environmental Quality (NCDEQ). This work is being performed as part of State
Lead Contract #N17004 between NCDEQ and ATC.

On October 28, 2019, ATC mobilized to the site to collect a groundwater sample from
monitoring well MW-1. Field notes from the monitoring event are included in Appendix A. The
monitoring well sample was collected in laboratory-supplied, preserved containers; entered into
chain of custody control; placed on ice; and shipped to North Carolina-accredited SGS North
America Inc. (SGS) in Scott, Louisiana. The samples were analyzed by EPA Method 6200B for
volatile organic compounds. The analytical report is included in Appendix B. The analytical
results were compared to the North Carolina Title 15A, NCAC, Subchapter 2L, Part .0202 (2L
Standards) for groundwater and Gross Contamination Levels (GCLs).

Based on the results, total xylenes, naphthalene, n-propylbenzene, methylene chloride, and 1,2,4-
trimethylbenzene were present above the 2L Standard in MW-1. No constituent was detected in
excess of the Gross Contamination Level (GCL). Well construction details and groundwater
elevation data for monitoring well MW-1 are included as Table 1. Monitoring well analytical
data is included as Table 2. Natural attenuation parameters are included as Table 3.

TABLES

TABLE 1
WELL CONSTRUCTION AND GROUNDWATER ELEVATION DATA

7532 US HIGHWAY 421
LILLINGTON, HARNETT COUNTY, NORTH CAROLINA
INCIDENT #42105
Monitoring
Well
Date
Installed
Well
Diameter
(inches)
Total Depth
(feet)
Screen Interval
(feet)
Top of Casing
(feet)Date Measured Depth to Free
Product (feet)
Depth to
Groundwater
(feet)
LNAPL
Thickness (feet)
Groundwater
Elevation (feet)
3/21/2019 --2.29 --97.71
10/28/2019 --6.54 --93.46
Notes:
1. LNAPL = Light Non-Aqueous Phase Liquid
2. -- = LNAPL Not Detected
100.00MW-1 2/27/2019 2 11 2-11
TABLE 2
GROUNDWATER ANALYTICAL RESULTS
7532 U.S. HIGHWAY 421
LILLINGTON, HARNETT COUNTY, NORTH CAROLINA
NCDEQ INCIDENT #42105
BenzeneTolueneEthylbenzeneXylene (total)Methyl Tert Butyl EtherDi-Isopropyl EtherNaphthalenesec-ButylbenzeneIsopropylbenzenen-PropylbenzeneMethylene Chloride1,2,3- Trichloropropane1,2,4-Trimethylbenzene1,3,5-Trimethylbenzene3/21/2019 <10 22.1 867 4,970 <10 <10 337 14.1 82.5 191 <10 21.9 1,890 450
10/28/2019 <10 <10 137 817 <10 <10 82.2 10.1 35.5 99.0 20.2 <10 836 200
1 600 600 500 20 70 6 70 70 70 5 0.005 400 400
5,000 260,000 84,500 85,500 20,000 70,000 6,000 8,500 25,000 30,000 5,000 NE 28,500 25,000
Notes:
1. "<" or ND = Not detected at or above the laboratory reporting limit.
2. Concentrations are reported in micrograms per liter (ug/l) = parts per billion.
3. Concentrations in bold print equal or exceed the NCDEQ 2L Standard (2L) and italic font indicates concentrations are above GCLs.
4. GCL = Gross Contaminantion Level are referenced in the "Guidelines for Assessment and Corrective Action".
5. MTBE = Methyl Tertiary Butyl Ether
6. IPE= Isopropyl Ether
2L GW Standard
GCL
Monitoring Well Date
Method 6200B
MW-1
TABLE 3
NATURAL ATTENUATION PARAMETERS
US HIGHWAY 421
LILLINGTON, HARNETT COUNTY, NORTH CAROLINA
NCDEQ INCIDENT #42105
3/21/2019 16.18 1.54 0.154 6.17 125
10/28/2019 24.5 3.11 0.188 6.23 45.1
Notes:
1. oC = Degrees Celsius.
2. mg/L = milligrams per liter.
3. µs/cm = micro Siemens per centimeter.
4. SU = Standard Units.
5. ORP = Oxidation Reduction Potential
6. mV = Millivolts ORP (mV)MW-1
WELL ID Date
Collected
Temperature (oC)Dissolved Oxygen (mg/L)Conductivity (us/cm)pHPage 1 of 1

FIGURES

Copyright:© 2013 National Geographic Society, i-cubed
0 2,500 5,000 7,500 10,000Feet Topographic Map7532 US HWY 421 - Incident #42105Lillington, Harnett County, NC NCDEQ- Mark PetermannDATE: PREP:Path: S:\GIS_GPS\Project_Folders\Liz Allyn\Topographic Map.mxdREV:PROJECT NO.SCALE:SLP4210501ATC Associates of North Carolina, P.C.Raleigh, North Carolina, 27604(919) 871-0999LAN
NOTES:Features shown are not an authoritative location, nor arethey presented to a stated accuracy.DATA SOURCES:Harnett County GIS DepartmentCOORDINATE SYSTEM:NAD 1983 StatePlane North Carolina FIPS 3200 Feet1:24,0008/27/2018Robert.BrodaSite

APPENDIX A

FIELD NOTES

APPENDIX B

LABORATORY ANALYTICAL RESULTS
11/04/19
Technical Report for
ATC Group Services LLC
7532 Hwy 421-Lillington, NC
SLP42105CO
SGS Job Number: LA58930
Sampling Date: 10/28/19
Report to:
ATC Group Services LLC.
2725 East Millbrook Road Suite 121
Raleigh, NC 27604
[e-mail]; [e-mail]
ATTN: Gabe Araos
Total number of pages in report:
Certifications: LDEQ(2048), LDHH(LA150012), AR(14-045-04), AZ(AZ0805), FL(E87657), IL(200082), KY(#31),
NC(487), SC(73004001), NJ(LA007), TX(T104704186-18-16), WV(257)
This report shall not be reproduced, except in its entirety, without the written approval of SGS.
Test results relate only to samples analyzed.
SGS North America Inc. • 500 Ambassador Caffery • Scott, LA 70583 • tel: [phone]
Test results contained within this data package meet the requirements
of the National Environmental Laboratory Accreditation Program
and/or state specific certification programs as applicable.
Client Service contact: Amy Jackson 337-237-4775
Ron Benjamin
Lab Director
Scott, LA 11/04/19
e-Hardcopy 2.0
Automated Report
22
SGS is the sole authority for authorizing edits or modifications to this document.
Unauthorized modification of this report is strictly prohibited.
Review standard terms at: http://www.sgs.com/en/terms-and-conditions
The results set forth herein are provided by SGS North America Inc.
Please share your ideas about
how we can serve you better at:
[e-mail]
1 of 22
LA58930
Table of Contents
-1-
Sections:
Section 1: Sample Summary ...................................................................................................3
Section 2: Summary of Hits ....................................................................................................4
Section 3: Sample Results ........................................................................................................5
3.1: LA58930-1: MW-1 .......................................................................................................6
Section 4: Misc. Forms ............................................................................................................9
4.1: Chain of Custody ...........................................................................................................10
Section 5: MS Volatiles - QC Data Summaries .....................................................................13
5.1: Method Blank Summary ................................................................................................14
5.2: Blank Spike/Blank Spike Duplicate Summary ..............................................................17
5.3: Matrix Spike/Matrix Spike Duplicate Summary ...........................................................20 123452 of 22
LA58930
SGS North America Inc.
Sample Summary
ATC Group Services LLC
Job No:LA58930
7532 Hwy 421-Lillington, NC
Project No: SLP42105CO
Sample Collected Matrix Client
Number Date Time By Received Code Type Sample ID
This report contains results reported as ND = Not detected. The following applies:
Organics ND = Not detected above the RL
LA58930-1 10/28/19 15:05 SL 10/30/19 AQ Ground Water MW-1
3 of 22
LA589301
Summary of Hits Page 1 of 1
Job Number:LA58930
Account:ATC Group Services LLC
Project:7532 Hwy 421-Lillington, NC
Collected:10/28/19
Lab Sample ID Client Sample ID Result/
Analyte Qual RL MDL Units Method
LA58930-1 MW-1
sec-Butylbenzene 10.1 10 ug/l SM 6200B
Ethylbenzene 137 10 ug/l SM 6200B
Isopropylbenzene 35.5 10 ug/l SM 6200B
Methylene Chloride 20.2 10 ug/l SM 6200B
Naphthalene 82.2 10 ug/l SM 6200B
n-Propylbenzene 99.0 10 ug/l SM 6200B
1,2,4-Trimethylbenzene 836 10 ug/l SM 6200B
1,3,5-Trimethylbenzene 200 10 ug/l SM 6200B
m,p-Xylene 597 20 ug/l SM 6200B
o-Xylene 221 10 ug/l SM 6200B
Xylene (total)817 10 ug/l SM 6200B
4 of 22
LA589302
SGS North America Inc.
Sample Results
Report of Analysis
Scott, LA
Section 3
5 of 22
LA589303
SGS North America Inc.
Report of Analysis Page 1 of 3
Client Sample ID:MW-1
Lab Sample ID:LA58930-1 Date Sampled:10/28/19
Matrix:AQ - Ground Water Date Received:10/30/19
Method:SM 6200B Percent Solids:n/a
Project:7532 Hwy 421-Lillington, NC
File ID DF Analyzed By Prep Date Prep Batch Analytical Batch
Run #1 2K0119379.D 20 11/01/19 14:09 CP n/a n/a V2K2150
Run #2
Purge Volume
Run #1 25.0 ml
Run #2
VOA Special List
CAS No.Compound Result RL Units Q
67-64-1 Acetone ND 200 ug/l
71-43-2 Benzene ND 10 ug/l
108-86-1 Bromobenzene ND 10 ug/l
74-97-5 Bromochloromethane ND 10 ug/l
75-27-4 Bromodichloromethane ND 10 ug/l
75-25-2 Bromoform ND 10 ug/l
104-51-8 n-Butylbenzene ND 10 ug/l
135-98-8 sec-Butylbenzene 10.1 10 ug/l
98-06-6 tert-Butylbenzene ND 10 ug/l
56-23-5 Carbon Tetrachloride ND 4.0 ug/l
108-90-7 Chlorobenzene ND 10 ug/l
75-00-3 Chloroethane ND 10 ug/l
67-66-3 Chloroform ND 10 ug/l
95-49-8 o-Chlorotoluene ND 10 ug/l
106-43-4 p-Chlorotoluene ND 10 ug/l
124-48-1 Dibromochloromethane ND 4.0 ug/l
96-12-8 1,2-Dibromo-3-chloropropane ND 10 ug/l
106-93-4 1,2-Dibromoethane ND 10 ug/l
75-71-8 Dichlorodifluoromethane ND 10 ug/l
541-73-1 m-Dichlorobenzene ND 10 ug/l
95-50-1 o-Dichlorobenzene ND 10 ug/l
106-46-7 p-Dichlorobenzene ND 10 ug/l
75-34-3 1,1-Dichloroethane ND 10 ug/l
107-06-2 1,2-Dichloroethane ND 4.0 ug/l
75-35-4 1,1-Dichloroethylene ND 10 ug/l
156-59-2 cis-1,2-Dichloroethylene ND 10 ug/l
156-60-5 trans-1,2-Dichloroethylene ND 10 ug/l
78-87-5 1,2-Dichloropropane ND 6.0 ug/l
142-28-9 1,3-Dichloropropane ND 10 ug/l
594-20-7 2,2-Dichloropropane ND 10 ug/l
563-58-6 1,1-Dichloropropene ND 10 ug/l
10061-01-5 cis-1,3-Dichloropropene ND 4.0 ug/l
ND = Not detected J = Indicates an estimated value
RL = Reporting Limit B = Indicates analyte found in associated method blank
E = Indicates value exceeds calibration range N = Indicates presumptive evidence of a compound
6 of 22
LA5893033.1
SGS North America Inc.
Report of Analysis Page 2 of 3
Client Sample ID:MW-1
Lab Sample ID:LA58930-1 Date Sampled:10/28/19
Matrix:AQ - Ground Water Date Received:10/30/19
Method:SM 6200B Percent Solids:n/a
Project:7532 Hwy 421-Lillington, NC
VOA Special List
CAS No.Compound Result RL Units Q
10061-02-6 trans-1,3-Dichloropropene ND 4.0 ug/l
108-20-3 Di-Isopropyl Ether ND 10 ug/l
64-17-5 Ethyl Alcohol ND 1000 ug/l
100-41-4 Ethylbenzene 137 10 ug/l
591-78-6 2-Hexanone ND 20 ug/l
87-68-3 Hexachlorobutadiene ND 4.0 ug/l
98-82-8 Isopropylbenzene 35.5 10 ug/l
99-87-6 p-Isopropyltoluene ND 10 ug/l
74-83-9 Methyl Bromide ND 10 ug/l
74-87-3 Methyl Chloride ND 10 ug/l
74-95-3 Methylene Bromide ND 10 ug/l
75-09-2 Methylene Chloride 20.2 10 ug/l
78-93-3 Methyl Ethyl Ketone ND 500 ug/l
108-10-1 4-Methyl-2-pentanone ND 10 ug/l
1634-04-4 Methyl Tert Butyl Ether ND 10 ug/l
91-20-3 Naphthalene 82.2 10 ug/l
103-65-1 n-Propylbenzene 99.0 10 ug/l
100-42-5 Styrene ND 10 ug/l
630-20-6 1,1,1,2-Tetrachloroethane ND 10 ug/l
79-34-5 1,1,2,2-Tetrachloroethane ND 4.0 ug/l
127-18-4 Tetrachloroethylene ND 10 ug/l
108-88-3 Toluene ND 10 ug/l
87-61-6 1,2,3-Trichlorobenzene ND 10 ug/l
120-82-1 1,2,4-Trichlorobenzene ND 10 ug/l
71-55-6 1,1,1-Trichloroethane ND 10 ug/l
79-00-5 1,1,2-Trichloroethane ND 6.0 ug/l
79-01-6 Trichloroethylene ND 10 ug/l
75-69-4 Trichlorofluoromethane ND 10 ug/l
96-18-4 1,2,3-Trichloropropane ND 10 ug/l
95-63-6 1,2,4-Trimethylbenzene 836 10 ug/l
108-67-8 1,3,5-Trimethylbenzene 200 10 ug/l
108-05-4 Vinyl Acetate ND 10 ug/l
75-01-4 Vinyl Chloride ND 2.0 ug/l
m,p-Xylene 597 20 ug/l
95-47-6 o-Xylene 221 10 ug/l
1330-20-7 Xylene (total)817 10 ug/l
CAS No.Surrogate Recoveries Run# 1 Run# 2 Limits
17060-07-0 1,2-Dichloroethane-D4 105%70-130%
ND = Not detected J = Indicates an estimated value
RL = Reporting Limit B = Indicates analyte found in associated method blank
E = Indicates value exceeds calibration range N = Indicates presumptive evidence of a compound
7 of 22
LA5893033.1
SGS North America Inc.
Report of Analysis Page 3 of 3
Client Sample ID:MW-1
Lab Sample ID:LA58930-1 Date Sampled:10/28/19
Matrix:AQ - Ground Water Date Received:10/30/19
Method:SM 6200B Percent Solids:n/a
Project:7532 Hwy 421-Lillington, NC
VOA Special List
CAS No.Surrogate Recoveries Run# 1 Run# 2 Limits
2037-26-5 Toluene-D8 96%70-130%
460-00-4 4-Bromofluorobenzene 97%70-130%
ND = Not detected J = Indicates an estimated value
RL = Reporting Limit B = Indicates analyte found in associated method blank
E = Indicates value exceeds calibration range N = Indicates presumptive evidence of a compound
8 of 22
LA5893033.1
SGS North America Inc.
Misc. Forms
Custody Documents and Other Forms
Includes the following where applicable:
• Chain of Custody
Scott, LA
Section 4
9 of 22
LA589304
LA58930: Chain of Custody
Page 1 of 3
10 of 22
LA5893044.1
LA58930: Chain of Custody
Page 2 of 3
11 of 22
LA5893044.1
SGS Sample Receipt Summary
Job Number:LA58930 Client:ATC
Date / Time Received:10/30/2019 8:35:00 AM Delivery Method:FedEx
Project:MW-1
4. No. Coolers:1
Airbill #'s:491386907899
Cooler Security
1. Custody Seals Present:
Y or N
2. Custody Seals Intact:
3. COC Present:
4. Smpl Dates/Time OK
2. Thermometer ID:
Cooler Temperature Y or N
1. Temp criteria achieved:
3. Cooler media:
DV440;
Ice (direct contact)
Quality Control Preservation Y or N N/A
1. Trip Blank present / cooler:
2. Trip Blank listed on COC:
3. Samples preserved properly:
4. VOCs headspace free:
Sample Integrity - Documentation Y or N
1. Sample labels present on bottles:
2. Container labeling complete:
3. Sample container label / COC agree:
Sample Integrity - Condition Y or N
1. Sample recvd within HT:
3. Condition of sample:
2. All containers accounted for:
Sample Integrity - Instructions
1. Analysis requested is clear:
2. Bottles received for unspecified tests
3. Sufficient volume recvd for analysis:
4. Compositing instructions clear:
5. Filtering instructions clear:
Intact
Y or N
Comments
Y or N N/A
Cooler Temps (Initial/Adjusted):#1: (1/1);
LA58930: Chain of Custody
Page 3 of 3
12 of 22
LA5893044.1
SGS North America Inc.
MS Volatiles
QC Data Summaries
Includes the following where applicable:
• Method Blank Summaries
• Blank Spike Summaries
• Matrix Spike and Duplicate Summaries
Scott, LA
Section 5
13 of 22
LA589305
Method Blank Summary Page 1 of 3
Job Number:LA58930
Account:ATCNCR ATC Group Services LLC
Project:7532 Hwy 421-Lillington, NC
Sample File ID DF Analyzed By Prep Date Prep Batch Analytical Batch
V2K2150-MB1 2K0119377.D 1 11/01/19 CP n/a n/a V2K2150
The QC reported here applies to the following samples:Method: SM 6200B
LA58930-1
CAS No.Compound Result RL Units Q
67-64-1 Acetone ND 10 ug/l
71-43-2 Benzene ND 0.50 ug/l
108-86-1 Bromobenzene ND 0.50 ug/l
74-97-5 Bromochloromethane ND 0.50 ug/l
75-27-4 Bromodichloromethane ND 0.50 ug/l
75-25-2 Bromoform ND 0.50 ug/l
104-51-8 n-Butylbenzene 0.16 0.50 ug/l J
135-98-8 sec-Butylbenzene ND 0.50 ug/l
98-06-6 tert-Butylbenzene ND 0.50 ug/l
56-23-5 Carbon Tetrachloride ND 0.20 ug/l
108-90-7 Chlorobenzene ND 0.50 ug/l
75-00-3 Chloroethane ND 0.50 ug/l
67-66-3 Chloroform ND 0.50 ug/l
95-49-8 o-Chlorotoluene ND 0.50 ug/l
106-43-4 p-Chlorotoluene ND 0.50 ug/l
124-48-1 Dibromochloromethane ND 0.20 ug/l
96-12-8 1,2-Dibromo-3-chloropropane ND 0.50 ug/l
106-93-4 1,2-Dibromoethane ND 0.50 ug/l
75-71-8 Dichlorodifluoromethane ND 0.50 ug/l
541-73-1 m-Dichlorobenzene ND 0.50 ug/l
95-50-1 o-Dichlorobenzene ND 0.50 ug/l
106-46-7 p-Dichlorobenzene ND 0.50 ug/l
75-34-3 1,1-Dichloroethane ND 0.50 ug/l
107-06-2 1,2-Dichloroethane ND 0.20 ug/l
75-35-4 1,1-Dichloroethylene ND 0.50 ug/l
156-59-2 cis-1,2-Dichloroethylene ND 0.50 ug/l
156-60-5 trans-1,2-Dichloroethylene ND 0.50 ug/l
78-87-5 1,2-Dichloropropane ND 0.30 ug/l
142-28-9 1,3-Dichloropropane ND 0.50 ug/l
594-20-7 2,2-Dichloropropane ND 0.50 ug/l
563-58-6 1,1-Dichloropropene ND 0.50 ug/l
10061-01-5 cis-1,3-Dichloropropene ND 0.20 ug/l
10061-02-6 trans-1,3-Dichloropropene ND 0.20 ug/l
108-20-3 Di-Isopropyl Ether ND 0.50 ug/l
64-17-5 Ethyl Alcohol ND 50 ug/l
100-41-4 Ethylbenzene ND 0.50 ug/l
14 of 22
LA5893055.1.1
Method Blank Summary Page 2 of 3
Job Number:LA58930
Account:ATCNCR ATC Group Services LLC
Project:7532 Hwy 421-Lillington, NC
Sample File ID DF Analyzed By Prep Date Prep Batch Analytical Batch
V2K2150-MB1 2K0119377.D 1 11/01/19 CP n/a n/a V2K2150
The QC reported here applies to the following samples:Method: SM 6200B
LA58930-1
CAS No.Compound Result RL Units Q
591-78-6 2-Hexanone ND 1.0 ug/l
87-68-3 Hexachlorobutadiene 0.37 0.20 ug/l
98-82-8 Isopropylbenzene ND 0.50 ug/l
99-87-6 p-Isopropyltoluene ND 0.50 ug/l
74-83-9 Methyl Bromide ND 0.50 ug/l
74-87-3 Methyl Chloride ND 0.50 ug/l
74-95-3 Methylene Bromide ND 0.50 ug/l
75-09-2 Methylene Chloride ND 0.50 ug/l
78-93-3 Methyl Ethyl Ketone ND 25 ug/l
108-10-1 4-Methyl-2-pentanone ND 0.50 ug/l
1634-04-4 Methyl Tert Butyl Ether ND 0.50 ug/l
91-20-3 Naphthalene 0.26 0.50 ug/l J
103-65-1 n-Propylbenzene ND 0.50 ug/l
100-42-5 Styrene ND 0.50 ug/l
630-20-6 1,1,1,2-Tetrachloroethane ND 0.50 ug/l
79-34-5 1,1,2,2-Tetrachloroethane ND 0.20 ug/l
127-18-4 Tetrachloroethylene ND 0.50 ug/l
108-88-3 Toluene ND 0.50 ug/l
87-61-6 1,2,3-Trichlorobenzene 0.44 0.50 ug/l J
120-82-1 1,2,4-Trichlorobenzene 0.34 0.50 ug/l J
71-55-6 1,1,1-Trichloroethane ND 0.50 ug/l
79-00-5 1,1,2-Trichloroethane ND 0.30 ug/l
79-01-6 Trichloroethylene ND 0.50 ug/l
75-69-4 Trichlorofluoromethane ND 0.50 ug/l
96-18-4 1,2,3-Trichloropropane ND 0.50 ug/l
95-63-6 1,2,4-Trimethylbenzene ND 0.50 ug/l
108-67-8 1,3,5-Trimethylbenzene ND 0.50 ug/l
108-05-4 Vinyl Acetate ND 0.50 ug/l
75-01-4 Vinyl Chloride ND 0.10 ug/l
m,p-Xylene ND 1.0 ug/l
95-47-6 o-Xylene ND 0.50 ug/l
1330-20-7 Xylene (total)ND 0.50 ug/l
15 of 22
LA5893055.1.1
Method Blank Summary Page 3 of 3
Job Number:LA58930
Account:ATCNCR ATC Group Services LLC
Project:7532 Hwy 421-Lillington, NC
Sample File ID DF Analyzed By Prep Date Prep Batch Analytical Batch
V2K2150-MB1 2K0119377.D 1 11/01/19 CP n/a n/a V2K2150
The QC reported here applies to the following samples:Method: SM 6200B
LA58930-1
CAS No.Surrogate Recoveries Limits
17060-07-0 1,2-Dichloroethane-D4 105%70-130%
2037-26-5 Toluene-D8 96%70-130%
460-00-4 4-Bromofluorobenzene 94%70-130%
16 of 22
LA5893055.1.1
Blank Spike/Blank Spike Duplicate Summary Page 1 of 3
Job Number:LA58930
Account:ATCNCR ATC Group Services LLC
Project:7532 Hwy 421-Lillington, NC
Sample File ID DF Analyzed By Prep Date Prep Batch Analytical Batch
V2K2150-BS1 2K0119374.D 1 11/01/19 CP n/a n/a V2K2150
V2K2150-BSD1 2K0119375.D 1 11/01/19 CP n/a n/a V2K2150
The QC reported here applies to the following samples:Method: SM 6200B
LA58930-1
Spike BSP BSP BSD BSD Limits
CAS No.Compound ug/l ug/l %ug/l %RPD Rec/RPD
67-64-1 Acetone 50 55.6 111 53.9 108 3 70-130/30
71-43-2 Benzene 20 19.8 99 21.5 108 8 70-130/30
108-86-1 Bromobenzene 20 20.5 103 20.3 102 1 70-130/30
74-97-5 Bromochloromethane 20 21.1 106 19.7 99 7 70-130/30
75-27-4 Bromodichloromethane 20 21.6 108 21.7 109 0 70-130/30
75-25-2 Bromoform 20 21.1 106 21.2 106 0 70-130/30
104-51-8 n-Butylbenzene 20 22.8 114 22.5 113 1 70-130/30
135-98-8 sec-Butylbenzene 20 21.8 109 21.3 107 2 70-130/30
98-06-6 tert-Butylbenzene 20 21.7 109 21.2 106 2 70-130/30
56-23-5 Carbon Tetrachloride 20 25.4 127 23.3 117 9 70-130/30
108-90-7 Chlorobenzene 20 20.5 103 20.3 102 1 70-130/30
75-00-3 Chloroethane 20 22.9 115 21.4 107 7 60-140/30
67-66-3 Chloroform 20 22.4 112 20.6 103 8 70-130/30
95-49-8 o-Chlorotoluene 20 20.9 105 20.3 102 3 70-130/30
106-43-4 p-Chlorotoluene 20 21.1 106 20.9 105 1 70-130/30
124-48-1 Dibromochloromethane 20 21.4 107 21.2 106 1 70-130/30
96-12-8 1,2-Dibromo-3-chloropropane 20 23.6 118 23.4 117 1 70-130/30
106-93-4 1,2-Dibromoethane 20 20.0 100 19.8 99 1 70-130/30
75-71-8 Dichlorodifluoromethane 20 29.2 146*27.1 136 7 60-140/30
541-73-1 m-Dichlorobenzene 20 20.6 103 20.3 102 1 70-130/30
95-50-1 o-Dichlorobenzene 20 20.4 102 20.1 101 1 70-130/30
106-46-7 p-Dichlorobenzene 20 23.6 118 23.3 117 1 70-130/30
75-34-3 1,1-Dichloroethane 20 23.2 116 21.5 108 8 70-130/30
107-06-2 1,2-Dichloroethane 20 20.9 105 21.0 105 0 70-130/30
75-35-4 1,1-Dichloroethylene 20 24.8 124 23.0 115 8 70-130/30
156-59-2 cis-1,2-Dichloroethylene 20 22.6 113 21.1 106 7 70-130/30
156-60-5 trans-1,2-Dichloroethylene 20 23.6 118 21.7 109 8 70-130/30
78-87-5 1,2-Dichloropropane 20 20.9 105 21.1 106 1 70-130/30
142-28-9 1,3-Dichloropropane 20 20.3 102 20.4 102 0 70-130/30
594-20-7 2,2-Dichloropropane 20 26.8 134*24.5 123 9 70-130/30
563-58-6 1,1-Dichloropropene 20 24.4 122 22.7 114 7 70-130/30
10061-01-5 cis-1,3-Dichloropropene 20 21.6 108 21.6 108 0 70-130/30
10061-02-6 trans-1,3-Dichloropropene 20 21.4 107 21.4 107 0 70-130/30
108-20-3 Di-Isopropyl Ether 20 21.6 108 20.1 101 7 70-130/30
64-17-5 Ethyl Alcohol 400 522 131*510 128 2 70-130/30
100-41-4 Ethylbenzene 20 21.4 107 20.9 105 2 70-130/30
* = Outside of Control Limits.
17 of 22
LA5893055.2.1
Blank Spike/Blank Spike Duplicate Summary Page 2 of 3
Job Number:LA58930
Account:ATCNCR ATC Group Services LLC
Project:7532 Hwy 421-Lillington, NC
Sample File ID DF Analyzed By Prep Date Prep Batch Analytical Batch
V2K2150-BS1 2K0119374.D 1 11/01/19 CP n/a n/a V2K2150
V2K2150-BSD1 2K0119375.D 1 11/01/19 CP n/a n/a V2K2150
The QC reported here applies to the following samples:Method: SM 6200B
LA58930-1
Spike BSP BSP BSD BSD Limits
CAS No.Compound ug/l ug/l %ug/l %RPD Rec/RPD
591-78-6 2-Hexanone 50 53.3 107 54.4 109 2 70-130/30
87-68-3 Hexachlorobutadiene 20 22.9 115 23.0 115 0 70-130/30
98-82-8 Isopropylbenzene 20 22.2 111 22.0 110 1 70-130/30
99-87-6 p-Isopropyltoluene 20 22.8 114 22.3 112 2 70-130/30
74-83-9 Methyl Bromide 20 24.3 122 23.5 118 3 60-140/30
74-87-3 Methyl Chloride 20 23.0 115 21.5 108 7 60-140/30
74-95-3 Methylene Bromide 20 21.1 106 21.0 105 0 70-130/30
75-09-2 Methylene Chloride 20 24.2 121 22.9 115 6 70-130/30
78-93-3 Methyl Ethyl Ketone 50 53.0 106 51.4 103 3 70-130/30
108-10-1 4-Methyl-2-pentanone 50 53.2 106 55.0 110 3 70-130/30
1634-04-4 Methyl Tert Butyl Ether 20 22.2 111 21.0 105 6 70-130/30
91-20-3 Naphthalene 20 22.8 114 22.9 115 0 70-130/30
103-65-1 n-Propylbenzene 20 21.4 107 21.0 105 2 70-130/30
100-42-5 Styrene 20 21.6 108 21.3 107 1 70-130/30
630-20-6 1,1,1,2-Tetrachloroethane 20 20.1 101 20.0 100 0 70-130/30
79-34-5 1,1,2,2-Tetrachloroethane 20 19.8 99 20.0 100 1 70-130/30
127-18-4 Tetrachloroethylene 20 21.3 107 21.2 106 0 70-130/30
108-88-3 Toluene 20 20.8 104 20.6 103 1 70-130/30
87-61-6 1,2,3-Trichlorobenzene 20 23.0 115 22.7 114 1 70-130/30
120-82-1 1,2,4-Trichlorobenzene 20 22.8 114 22.6 113 1 70-130/30
71-55-6 1,1,1-Trichloroethane 20 23.5 118 21.6 108 8 70-130/30
79-00-5 1,1,2-Trichloroethane 20 19.9 100 20.0 100 1 70-130/30
79-01-6 Trichloroethylene 20 21.6 108 21.5 108 0 70-130/30
75-69-4 Trichlorofluoromethane 20 25.0 125 23.1 116 8 60-140/30
96-18-4 1,2,3-Trichloropropane 20 20.4 102 18.5 93 10 70-130/30
95-63-6 1,2,4-Trimethylbenzene 20 21.6 108 21.2 106 2 70-130/30
108-67-8 1,3,5-Trimethylbenzene 20 21.8 109 21.4 107 2 70-130/30
108-05-4 Vinyl Acetate 20 23.6 118 22.5 113 5 70-130/30
75-01-4 Vinyl Chloride 20 23.9 120 22.1 111 8 60-140/30
m,p-Xylene 40 43.1 108 42.1 105 2 70-130/30
95-47-6 o-Xylene 20 21.5 108 21.3 107 1 70-130/30
1330-20-7 Xylene (total)60 64.6 108 63.3 106 2 70-130/30
* = Outside of Control Limits.
18 of 22
LA5893055.2.1
Blank Spike/Blank Spike Duplicate Summary Page 3 of 3
Job Number:LA58930
Account:ATCNCR ATC Group Services LLC
Project:7532 Hwy 421-Lillington, NC
Sample File ID DF Analyzed By Prep Date Prep Batch Analytical Batch
V2K2150-BS1 2K0119374.D 1 11/01/19 CP n/a n/a V2K2150
V2K2150-BSD1 2K0119375.D 1 11/01/19 CP n/a n/a V2K2150
The QC reported here applies to the following samples:Method: SM 6200B
LA58930-1
CAS No.Surrogate Recoveries BSP BSD Limits
17060-07-0 1,2-Dichloroethane-D4 109%104%70-130%
2037-26-5 Toluene-D8 100%100%70-130%
460-00-4 4-Bromofluorobenzene 99%101%70-130%
* = Outside of Control Limits.
19 of 22
LA5893055.2.1
Matrix Spike/Matrix Spike Duplicate Summary Page 1 of 3
Job Number:LA58930
Account:ATCNCR ATC Group Services LLC
Project:7532 Hwy 421-Lillington, NC
Sample File ID DF Analyzed By Prep Date Prep Batch Analytical Batch
LA58903-5MS 2K0119382.D 200 11/01/19 CP n/a n/a V2K2150
LA58903-5MSD 2K0119383.D 200 11/01/19 CP n/a n/a V2K2150
LA58903-5 2K0119378.D 100 11/01/19 CP n/a n/a V2K2150
The QC reported here applies to the following samples:Method: SM 6200B
LA58930-1
LA58903-5 Spike MS MS Spike MSD MSD Limits
CAS No.Compound ug/l Q ug/l ug/l %ug/l ug/l %RPD Rec/RPD
67-64-1 Acetone ND 10000 7830 78 10000 8130 81 4 70-130/20
71-43-2 Benzene 126 4000 4470 109 4000 4000 97 11 70-130/20
108-86-1 Bromobenzene ND 4000 3950 99 4000 4000 100 1 70-130/20
74-97-5 Bromochloromethane ND 4000 3980 100 4000 3960 99 1 70-130/20
75-27-4 Bromodichloromethane ND 4000 4320 108 4000 4250 106 2 70-130/20
75-25-2 Bromoform ND 4000 3990 100 4000 4200 105 5 70-130/20
104-51-8 n-Butylbenzene 22.8 4000 4220 105 4000 4250 106 1 70-130/20
135-98-8 sec-Butylbenzene ND 4000 4100 103 4000 4100 103 0 70-130/20
98-06-6 tert-Butylbenzene ND 4000 4070 102 4000 4100 103 1 70-130/20
56-23-5 Carbon Tetrachloride ND 4000 4710 118 4000 4620 116 2 70-130/20
108-90-7 Chlorobenzene ND 4000 3970 99 4000 3970 99 0 70-130/20
75-00-3 Chloroethane ND 4000 4280 107 4000 4140 104 3 60-140/20
67-66-3 Chloroform ND 4000 4210 105 4000 4200 105 0 70-130/20
95-49-8 o-Chlorotoluene ND 4000 3990 100 4000 3960 99 1 70-130/20
106-43-4 p-Chlorotoluene ND 4000 4040 101 4000 4030 101 0 70-130/20
124-48-1 Dibromochloromethane ND 4000 4060 102 4000 4200 105 3 70-130/20
96-12-8 1,2-Dibromo-3-chloropropane ND 4000 4310 108 4000 4580 115 6 70-130/20
106-93-4 1,2-Dibromoethane ND 4000 3870 97 4000 3980 100 3 70-130/20
75-71-8 Dichlorodifluoromethane ND 4000 5160 129 4000 4740 119 8 60-140/20
541-73-1 m-Dichlorobenzene ND 4000 3850 96 4000 3930 98 2 70-130/20
95-50-1 o-Dichlorobenzene ND 4000 3840 96 4000 3920 98 2 70-130/20
106-46-7 p-Dichlorobenzene ND 4000 4470 112 4000 4550 114 2 70-130/20
75-34-3 1,1-Dichloroethane ND 4000 4360 109 4000 4340 109 0 70-130/20
107-06-2 1,2-Dichloroethane ND 4000 4150 104 4000 4120 103 1 70-130/20
75-35-4 1,1-Dichloroethylene ND 4000 4640 116 4000 4620 116 0 70-130/20
156-59-2 cis-1,2-Dichloroethylene ND 4000 4230 106 4000 4250 106 0 70-130/20
156-60-5 trans-1,2-Dichloroethylene ND 4000 4390 110 4000 4370 109 0 70-130/20
78-87-5 1,2-Dichloropropane ND 4000 4220 106 4000 4090 102 3 70-130/20
142-28-9 1,3-Dichloropropane ND 4000 3900 98 4000 4000 100 3 70-130/20
594-20-7 2,2-Dichloropropane ND 4000 4580 115 4000 4740 119 3 70-130/20
563-58-6 1,1-Dichloropropene ND 4000 4610 115 4000 4500 113 2 70-130/20
10061-01-5 cis-1,3-Dichloropropene ND 4000 4220 106 4000 4190 105 1 70-130/20
10061-02-6 trans-1,3-Dichloropropene ND 4000 4090 102 4000 4170 104 2 70-130/20
108-20-3 Di-Isopropyl Ether ND 4000 4040 101 4000 4120 103 2 70-130/20
64-17-5 Ethyl Alcohol 1050 80000 84200 104 80000 97700 121 15 70-130/20
100-41-4 Ethylbenzene 1280 4000 5460 105 4000 5420 104 1 70-130/20
* = Outside of Control Limits.
20 of 22
LA5893055.3.1
Matrix Spike/Matrix Spike Duplicate Summary Page 2 of 3
Job Number:LA58930
Account:ATCNCR ATC Group Services LLC
Project:7532 Hwy 421-Lillington, NC
Sample File ID DF Analyzed By Prep Date Prep Batch Analytical Batch
LA58903-5MS 2K0119382.D 200 11/01/19 CP n/a n/a V2K2150
LA58903-5MSD 2K0119383.D 200 11/01/19 CP n/a n/a V2K2150
LA58903-5 2K0119378.D 100 11/01/19 CP n/a n/a V2K2150
The QC reported here applies to the following samples:Method: SM 6200B
LA58930-1
LA58903-5 Spike MS MS Spike MSD MSD Limits
CAS No.Compound ug/l Q ug/l ug/l %ug/l ug/l %RPD Rec/RPD
591-78-6 2-Hexanone ND 10000 8760 88 10000 9210 92 5 70-130/20
87-68-3 Hexachlorobutadiene 18.5 4000 4070 101 4000 4260 106 5 70-130/20
98-82-8 Isopropylbenzene 42.2 4000 4300 106 4000 4310 107 0 70-130/20
99-87-6 p-Isopropyltoluene ND 4000 4250 106 4000 4280 107 1 70-130/20
74-83-9 Methyl Bromide ND 4000 4040 101 4000 4550 114 12 60-140/20
74-87-3 Methyl Chloride 50.6 4000 4260 105 4000 4210 104 1 60-140/20
74-95-3 Methylene Bromide ND 4000 4190 105 4000 4180 105 0 70-130/20
75-09-2 Methylene Chloride 24.5 4000 4550 113 4000 4620 115 2 70-130/20
78-93-3 Methyl Ethyl Ketone ND 10000 8740 87 10000 9260 93 6 70-130/20
108-10-1 4-Methyl-2-pentanone ND 10000 10000 100 10000 10700 107 7 70-130/20
1634-04-4 Methyl Tert Butyl Ether ND 4000 4140 104 4000 4280 107 3 70-130/20
91-20-3 Naphthalene 532 4000 4830 107 4000 5250 118 8 70-130/20
103-65-1 n-Propylbenzene 118 4000 4180 102 4000 4200 102 0 70-130/20
100-42-5 Styrene 21.7 4000 4150 103 4000 4150 103 0 70-130/20
630-20-6 1,1,1,2-Tetrachloroethane ND 4000 3900 98 4000 3880 97 1 70-130/20
79-34-5 1,1,2,2-Tetrachloroethane ND 4000 3800 95 4000 3970 99 4 70-130/20
127-18-4 Tetrachloroethylene ND 4000 4120 103 4000 4030 101 2 70-130/20
108-88-3 Toluene 8010 4000 12300 107 4000 12300 107 0 70-130/20
87-61-6 1,2,3-Trichlorobenzene 23.7 4000 4010 100 4000 4430 110 10 70-130/20
120-82-1 1,2,4-Trichlorobenzene 19.6 4000 4140 103 4000 4370 109 5 70-130/20
71-55-6 1,1,1-Trichloroethane ND 4000 4390 110 4000 4350 109 1 70-130/20
79-00-5 1,1,2-Trichloroethane ND 4000 3890 97 4000 3970 99 2 70-130/20
79-01-6 Trichloroethylene ND 4000 4240 106 4000 4130 103 3 70-130/20
75-69-4 Trichlorofluoromethane ND 4000 4480 112 4000 4240 106 6 60-140/20
96-18-4 1,2,3-Trichloropropane 21.3 4000 3910 97 4000 3700 92 6 70-130/20
95-63-6 1,2,4-Trimethylbenzene 1280 4000 5480 105 4000 5400 103 1 70-130/20
108-67-8 1,3,5-Trimethylbenzene 310 4000 4450 104 4000 4450 104 0 70-130/20
108-05-4 Vinyl Acetate ND 4000 4370 109 4000 4610 115 5 70-130/20
75-01-4 Vinyl Chloride ND 4000 4310 108 4000 4180 105 3 60-140/20
m,p-Xylene 4880 8000 13100 103 8000 13000 102 1 70-130/20
95-47-6 o-Xylene 2410 4000 6650 106 4000 6640 106 0 70-130/20
1330-20-7 Xylene (total)7290 12000 19800 104 12000 19700 103 1 70-130/20
* = Outside of Control Limits.
21 of 22
LA5893055.3.1
Matrix Spike/Matrix Spike Duplicate Summary Page 3 of 3
Job Number:LA58930
Account:ATCNCR ATC Group Services LLC
Project:7532 Hwy 421-Lillington, NC
Sample File ID DF Analyzed By Prep Date Prep Batch Analytical Batch
LA58903-5MS 2K0119382.D 200 11/01/19 CP n/a n/a V2K2150
LA58903-5MSD 2K0119383.D 200 11/01/19 CP n/a n/a V2K2150
LA58903-5 2K0119378.D 100 11/01/19 CP n/a n/a V2K2150
The QC reported here applies to the following samples:Method: SM 6200B
LA58930-1
CAS No.Surrogate Recoveries MS MSD LA58903-5 Limits
17060-07-0 1,2-Dichloroethane-D4 104%106%106%70-130%
2037-26-5 Toluene-D8 101%100%96%70-130%
460-00-4 4-Bromofluorobenzene 99%101%97%70-130%
* = Outside of Control Limits.
22 of 22
LA5893055.3.1