25094_Mock Judson Mill_SupplimentalGWReport_20230414

SUPPLEMENTAL GROUNDWATER
SAMPLING REPORT

Mock Judson Mill
2610 Oakland Avenue
Greensboro, North Carolina
Brownfields Project Number: 25094-21-041

Submitted By
Atlantic Shores Environmental Services, Ltd.
ASE License No. C-4767
April 14, 2023
Cheryl J. Moody, PE, REM
Principal Engineer

Supplemental Groundwater Sampling Report April 14, 2023
2610 Oakland Avenue
Brownfield Project Number: 25094-21-041
ASE Project No: 1533

i
TABLE OF CONTENTS

1.0 BACKGROUND ........................................................................................................................... 1
2.0 SAMPLING METHODOLOGY ................................................................................................. 3
3.0 RESULTS ...................................................................................................................................... 3
4.0 CONCLUSIONS ........................................................................................................................... 3

Attachments:
Figures:
Figure 1 – Site Location Map
Figure 2 – Groundwater Sampling Locations
Tables:
Table 1: Groundwater Well Purge Data
Table 2: Groundwater Analytical Results

Appendices:
Appendix A – Laboratory Data
Supplemental Groundwater Sampling Report April 14, 2023
2610 Oakland Avenue
Brownfield Project Number: 25094-21-041
ASE Project No: 1533

1.0 BACKGROUND

Atlantic Shores Environmental Services, Ltd. (ASE) is pleased to provide this Supplemental Soil and
Groundwater Sampling Report for the 2610 Oakland Avenue Brownfield site (Refer to Figure 1).

The site consists of approximately 8.67 acres and encompasses all of the property in the block between
Oakland Avenue, South Lindell Street, Hiatt Street and Harold Street in Greensboro, North Carolina. The
site is developed with a vacant two-story mill building, its associated boiler room building, and a smoke
stack. The south half of the property is currently undeveloped. The site buildings are being redeveloped
into a 173 unit apartment complex, which will ultimately encompass the northern two thirds of the property.
The existing main mill building is constructed primarily on a slab. However, a small basement is located in
the northwest corner of the c.1928 portion of the building. The boiler room is also constructed on a slab
foundation. However, this structure is partially sub grade and is currently flooded with approximately 4 feet
of water. This water was sampled in two locations prior to the site being admitted into the Brownfield
Program. Target constituents above unrestricted use were not identified in the standing water.

The planned amenities include a swimming pool, outdoor lawn and grilling area and a dog park. The dog
park will be covered with turf to prevent digging. Paved parking will be located both north and south of the
buildings.

Assessments of the site, prior to inclusion of the site into the Brownfields program, include:
Environmental Reports
Report Prepared by Date
Closure Report for Kayser-Roth
Corporation
Four Seasons
Industrial Service, Inc. September 30, 1991
Phase I Environmental Site Assessment Swift Creek
Environmental, Inc. March 23, 2017
Subsurface Investigation Report Swift Creek
Environmental, Inc. May 19, 2017
Phase I Environmental Site Assessment Swift Creek
Environmental, Inc.
April 2, 2020
Boiler Room Water Sampling
(November 3, 2021)
Atlantic Shores Environmental
Services Ltd. September 20, 2022
Phase I Environmental Site Assessment
Report
Atlantic Shores Environmental
Services Ltd. December 2, 2021
Phase II Environmental
Assessment/Remediation Investigation
Report
Swift Creek
Environmental, Inc. December 6, 2021

These assessments occurred prior to receiving eligibility into the Brownfield Program.
September 1991 (UST Removal) - Three fuel oil USTs and one Varsol UST have been removed from the
site. Approximately 1,200 tons of fuel oil impacted soil was excavated from the fuel oil tank pits. However,
elevated oil & grease remain on the site in this area at a depth of 16-17 feet. Testing from beneath the Varsol
tank did not identify impacts.
Supplemental Groundwater Sampling Report April 14, 2023
2610 Oakland Avenue
Brownfield Project Number: 25094-21-041
ASE Project No: 1533

May 2017 – Six soil borings, four of which were completed as temporary monitoring wells were advanced
at the site. Chromium was identified in one of the three analyzed samples and lead, silver and TPH- ORO
were identified in one of the three soil samples above residential PSRGs. Benzo(a)anthracene and 1-
Methylnaphthalene were also identified in two of the collected soil samples above residential PSRGs.
Barium, chromium and lead were identified in one of the two groundwater samples that were analyzed for
metals above 2L standards.
Two sub slab soil vapor samples were collected within the main building. Results of the analyses did not
identify VOCs above NCDEQ Residential Sub Slab SCLs (Soil Gas Screening Levels).
November 2021: Two samples were collected from the four foot of water located within the boiler room. These
samples were analyzed for VOCs, SVOCs and RCRA 8 metals. Two volatile organic compounds (VOCs) and
one metal were identified in the samples. However, each identified constituent was below their respective
NCDEQ Groundwater Quality Standards (2L).

December 2021: A total of 32 soil borings were advanced on the property at locations of concern identified
during previous assessment activities. Volatile Organic Compounds (VOCs) were detected in soil samples.
Several PAHs, metals, and PCB congeners were detected at concentrations above Residential PSRGs. A
risk assessment was performed by Swift Creek, which indicated that soil concentrations identified at the
site do not pose an unacceptable risk to a residential receptor under the direct contact soil pathway.

Groundwater investigation activities consisted of installation and sampling of 11 groundwater
monitoring wells at the site. The results of the sampling and analyses did not identify exceedances of the 2L
Standards. Swift Creek preformed a NCDEQ risk evaluation of detected constituents which did not indicate
unacceptable risk for direct contact for a residential receptor.

Sub-slab soil vapor samples were collected from eight locations within the main mill building. Swift Creek
reported naphthalene was detected at a concentration above its Residential SGSL in five of the sub-slab soil
gas samples. A risk assessment was completed by Swift Creek using the sub-slab soil gas data. The
results showed that neither the target carcinogenic risk nor the target hazard index were exceeded. Based on
these results, vapor intrusion into the main building is not anticipated to pose an unacceptable risk to
receptors under a residential use scenario. To evaluate vapor intrusion risk in the boiler room, and as an additional
line of evidence for vapor intrusion risk in the main building, VOC groundwater data was used to evaluate
the potential for vapor intrusion risk. The results indicated that the potential for vapor intrusion in the
main building and boiler room is not anticipated to pose an unacceptable risk to residential receptors.

Cumulative site-wide risk was calculated by summing the risks associated with the soil direct use,
groundwater direct use, and vapor intrusion pathways. The results indicate that site-wide risks are within
allowable risk limits under a residential use scenario.

Data gaps identified in the historic sampling included the lack of soil and groundwater samples analyzed
for hexavalent chromium, and a lack of SVOC and VOC analysis from three of the on-site wells.

ASE conducted soil and groundwater sampling, which was submitted in a report dated September 30, 2022.
This data serves to partially fill some of the previous data gaps. The results in this report include sampling
three onsite monitoring wells for RCRA 8 metals only.

Supplemental Groundwater Sampling Report April 14, 2023
2610 Oakland Avenue
Brownfield Project Number: 25094-21-041
ASE Project No: 1533

2.0 SAMPLING METHODOLOGY

Sampling was conducted in accordance with the Draft Work Plan for the site dated March 16, 2023. This report
discusses the assessment of a portion of the work outlined in the Draft Work Plan. The remaining soil gas, sub
slab and limited soil sampling assessment is pending the Work Plan approval.

The existing permanent groundwater wells are constructed with 1 inch PVC. However, the Swift Creek
reports identify them as 2 inch wells. Four (4) to five (5) well volumes (approximately 0.042 gallons per
foot of 1-inch well is one well volume) were purged prior to sampling. Purge water was placed in a labelled
55-gallon drum. The purging was completed with low flow peristaltic pump and dedicated tubing. The
Turbidity (NTUs) was recorded after each well volume. In addition to turbidity, conductivity and pH
readings were monitored at each well volume during purging to document stabilization readings. Turbidity
readings did not go down to 10 NTU or less after five well volumes. Therefore, the development stopped
based on the stabilization of the parameters. The samples were collected using a low flow peristaltic pump
and dedicated tubing. The location of these wells are illustrated on Figure 2.

The samples from MW-1, MW-2, and MW-3 were analyzed the presence of RECR 8 metals by EPA
Method 6020/7471. A duplicate a was collected from The groundwater samples were submitted to Pace
Analytical Laboratory located at 9800 Kincey Avenue, Suite 100 in Huntersville, North Carolina under the
chain of custody protocol.

3.0 RESULTS

ASE collected groundwater samples from MW-1, MW-2, and MW-3 on March 23, 2023. Baseline water
levels were recorded prior to purging. Baseline water levels and parameter values are listed in Table 1.

Groundwater impacts above established NCAC 2L Groundwater Standards were identified in the collected
samples. Total chromium was identified above the chromium 2L standard in the sample collected from
MW-2, but was not identified above the 2L standard in its duplicate sample. Elevated chromium was also
identified in the sample collected from MW-3 along with exceedances of barium, arsenic and lead 2L
standards. Refer to Table 2 for a summary of the groundwater data. Copies of the lab data sheets have been
included in Appendix B.

4.0 CONCLUSIONS

Target analytes were identified in the collected groundwater samples above 2L Standards. The drums of
groundwater purge water will be disposed of under manifest.

Supplemental Groundwater Sampling Report April 14, 2023
2610 Oakland Avenue
Brownfield Project Number: 25094-21-041
ASE Project No: 1533

FIGURES

Figure 1 – Site Location Map
Figure 2 - Groundwater Sampling Locations

FIGURE 1: SITE LOCATION MAP
Source: USGS Greensboro, North Carolina Quadrangle, 2013.
Work Plan
Former Mock Judson Mill
2610 Oakland Avenue
Greensboro, North Carolina
N
Brownfield No.25094-21-041
January 2023
SS13SS14SS15SS16SS17SS18SS19SS20SS21SS1SS2 SS#SS4SS5SS6SS7SS8SS9SS10SS11SS12Soil Sample LocationAS10AS9AS8AS7AS6AS5AS4BG1AS3Air Sample LocationFigure 2- Sample LocationsMW-1MW-2MW-3
Supplemental Groundwater Sampling Report April 14, 2023
2610 Oakland Avenue
Brownfield Project Number: 25094-21-041
ASE Project No: 1533

TABLES

Table 1: Groundwater Well Purge Data
Table 2: Groundwater Analytical Results

Sample Date Well Depth
(ft)
Depth to
Water (ft)
Purge Volume
(Gallons)Purge No.Purge Time pH Conductivity
(Ms/cm)
Turbidity
(NTU)
1 13:31 4.89 0.049 321
2 13:33 4.86 0.047 342
3 13:35 4.85 0.042 330
4 13:37 4.85 0.041 329
5 13:40 4.86 0.042 328
1 12:42 5.22 0.062 298
2 12:44 5.18 0.051 272
3 12:46 5.17 0.05 270
4 12:48 5.16 0.05 269
5 12:50 5.17 0.05 269
1 13:10 4.86 0.042 278
2 13:12 4.89 0.051 280
3 13:14 4.87 0.049 281
4 13:16 4.86 0.05 280
5 13:20 4.85 0.049 282
14.8 10.12
8.55
Table 1 - Baseline Water Level and Groundwater Well Purge Data
Greensboro, North Carolina
Mock Judson Mill
MW1
MW3
3/23/23
3/23/23
20
2610 Oakland Avenue
9.518.95
0.45
0.46
0.17MW23/23/23
Sample ID MW-1 MW-2
DUP
(MW-2)MW-3
Date 3/23/23 3/23/23 3/23/23
Arsenic 7.5J 6.5J 8.3J 14.4J 10
Barium 79.0 96.0 66.7 288 700
Chromium (total)5.6 10.2 3.8J 36.1 10
Lead 5.6J <2.5 <2.5 46.6 15
NA - Not Analized, NE - Not Established, ND - Not Detected
Red values exceed the NCAC 2L Groundwater Quality Standards set by the North Carolina
Department of Environmental Quality (April 1 2022)
TABLE 2 - Supplimental Groundwater Sampling Results Above 2L Standards
Mock Judson Mill, 2610 Oakland Avenue
Greensboro, North Carolina
Brownfield No. 25094-21-041
NCDEQ
Groundwater Quality
Standards (2L)
RCRA 8 Metals (ug/L)
Not Volatile
GWSL ug/L
Not Volatile
Not Volatile
Not Volatile
Supplemental Groundwater Sampling Report April 14, 2023
2610 Oakland Avenue
Brownfield Project Number: 25094-21-041
ASE Project No: 1533

APPENDIX A

LABORATORY DATA

#=CL#
April 04, 2023
LIMS USE: FR - CHERYL MOODY
LIMS OBJECT ID: 92658610
92658610
Project:
Pace Project No.:
RE:
Cheryl Moody
Atlantic Shore Environmental
175-1 Venture Drive
Belville, NC 28451
GROUNDWATER SAMPLING
Dear Cheryl Moody:
Enclosed are the analytical results for sample(s) received by the laboratory on March 23, 2023. The results relate only to
the samples included in this report. Results reported herein conform to the applicable TNI/NELAC Standards and the
laboratory's Quality Manual, where applicable, unless otherwise noted in the body of the report.
The test results provided in this final report were generated by each of the following laboratories within the Pace Network:
• Pace Analytical Services - Beaver
If you have any questions concerning this report, please feel free to contact me.
Sincerely,
Matthew Brainard
[e-mail]
Project Manager
[phone]
Enclosures
cc:Daniel J. Schiwinger, Atlantic Shores Environmental
Services, Ltd.
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.
Pace Analytical Services, LLC
9800 Kincey Ave. Suite 100
Huntersville, NC 28078
[phone]
Page 1 of 15
#=CP#
CERTIFICATIONS
Pace Project No.:
Project:
92658610
GROUNDWATER SAMPLING
Pace Analytical Services Beaver
225 Industrial Park Road, Beaver, WV 25813
Virginia VELAP 460148
West Virginia DEP 060
West Virginia DHHR 00412CM
North Carolina DEQ 466
Kentucky Wastewater Certification KY90039
Pennsylvania DEP 68-00839
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.
Pace Analytical Services, LLC
9800 Kincey Ave. Suite 100
Huntersville, NC 28078
[phone]
Page 2 of 15
#=SS#
SAMPLE SUMMARY
Pace Project No.:
Project:
92658610
GROUNDWATER SAMPLING
Lab ID Sample ID Matrix Date Collected Date Received
92658610001 DUP (MW-2)Water 03/23/23 13:05 03/23/23 15:10
92658610002 MW-2 Water 03/23/23 13:05 03/23/23 15:10
92658610003 MW-3 Water 03/23/23 13:30 03/23/23 15:10
92658610004 MW-1 Water 03/23/23 13:50 03/23/23 15:10
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.
Pace Analytical Services, LLC
9800 Kincey Ave. Suite 100
Huntersville, NC 28078
[phone]
Page 3 of 15
#=SA#
SAMPLE ANALYTE COUNT
Pace Project No.:
Project:
92658610
GROUNDWATER SAMPLING
Lab ID Sample ID Method
Analytes
Reported LaboratoryAnalysts
92658610001 DUP (MW-2)EPA 6010D 7 PASI-BVMFC
EPA 7470A 1 PASI-BVJLH1
92658610002 MW-2 EPA 6010D 7 PASI-BVMFC
EPA 7470A 1 PASI-BVJLH1
92658610003 MW-3 EPA 6010D 7 PASI-BVMFC
EPA 7470A 1 PASI-BVJLH1
92658610004 MW-1 EPA 6010D 7 PASI-BVMFC
EPA 7470A 1 PASI-BVJLH1
PASI-BV = Pace Analytical Services - Beaver
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.
Pace Analytical Services, LLC
9800 Kincey Ave. Suite 100
Huntersville, NC 28078
[phone]
Page 4 of 15
#=AR#
ANALYTICAL RESULTS
Pace Project No.:
Project:
92658610
GROUNDWATER SAMPLING
Sample:DUP (MW-2)Lab ID:92658610001 Collected:03/23/23 13:05 Received:03/23/23 15:10 Matrix:Water
Parameters Results Units DF Prepared Analyzed CAS No.QualMDLLimit
Report
Analytical Method: EPA 6010D Preparation Method: EPA 3010A
Pace Analytical Services - Beaver
BVR 6010D ICP, Water, 3010A
Arsenic 8.3J ug/L 04/03/23 17:32 7440-38-204/03/23 09:4120.0 6.4 1
Barium 66.7 ug/L 04/03/23 17:32 7440-39-304/03/23 09:415.0 1.4 1
Cadmium ND ug/L 04/03/23 17:32 7440-43-904/03/23 09:412.0 1.8 1
Chromium 3.8J ug/L 04/03/23 17:32 7440-47-304/03/23 09:415.0 1.3 1
Lead ND ug/L 04/03/23 17:32 7439-92-104/03/23 09:4110.0 2.5 1
Selenium ND ug/L 04/03/23 17:32 7782-49-204/03/23 09:4120.0 9.2 1
Silver ND ug/L 04/03/23 17:32 7440-22-404/03/23 09:415.0 2.6 1
Analytical Method: EPA 7470A Preparation Method: EPA 7470A
Pace Analytical Services - Beaver
BVR 7470 Mercury
Mercury ND ug/L 04/02/23 17:37 7439-97-604/02/23 10:580.20 0.20 1
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.Date: 04/04/2023 12:30 PM
Pace Analytical Services, LLC
9800 Kincey Ave. Suite 100
Huntersville, NC 28078
[phone]
Page 5 of 15
#=AR#
ANALYTICAL RESULTS
Pace Project No.:
Project:
92658610
GROUNDWATER SAMPLING
Sample:MW-2 Lab ID:92658610002 Collected:03/23/23 13:05 Received:03/23/23 15:10 Matrix:Water
Parameters Results Units DF Prepared Analyzed CAS No.QualMDLLimit
Report
Analytical Method: EPA 6010D Preparation Method: EPA 3010A
Pace Analytical Services - Beaver
BVR 6010D ICP, Water, 3010A
Arsenic 6.5J ug/L 04/03/23 17:34 7440-38-204/03/23 09:4120.0 6.4 1
Barium 96.0 ug/L 04/03/23 17:34 7440-39-304/03/23 09:415.0 1.4 1
Cadmium ND ug/L 04/03/23 17:34 7440-43-904/03/23 09:412.0 1.8 1
Chromium 10.2 ug/L 04/03/23 17:34 7440-47-304/03/23 09:415.0 1.3 1
Lead ND ug/L 04/03/23 17:34 7439-92-104/03/23 09:4110.0 2.5 1
Selenium ND ug/L 04/03/23 17:34 7782-49-204/03/23 09:4120.0 9.2 1
Silver ND ug/L 04/03/23 17:34 7440-22-404/03/23 09:415.0 2.6 1
Analytical Method: EPA 7470A Preparation Method: EPA 7470A
Pace Analytical Services - Beaver
BVR 7470 Mercury
Mercury ND ug/L 04/02/23 17:39 7439-97-604/02/23 10:580.20 0.20 1
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.Date: 04/04/2023 12:30 PM
Pace Analytical Services, LLC
9800 Kincey Ave. Suite 100
Huntersville, NC 28078
[phone]
Page 6 of 15
#=AR#
ANALYTICAL RESULTS
Pace Project No.:
Project:
92658610
GROUNDWATER SAMPLING
Sample:MW-3 Lab ID:92658610003 Collected:03/23/23 13:30 Received:03/23/23 15:10 Matrix:Water
Parameters Results Units DF Prepared Analyzed CAS No.QualMDLLimit
Report
Analytical Method: EPA 6010D Preparation Method: EPA 3010A
Pace Analytical Services - Beaver
BVR 6010D ICP, Water, 3010A
Arsenic 14.4J ug/L 04/03/23 17:40 7440-38-204/03/23 09:4120.0 6.4 1
Barium 288 ug/L 04/03/23 17:40 7440-39-304/03/23 09:415.0 1.4 1
Cadmium ND ug/L 04/03/23 17:40 7440-43-904/03/23 09:412.0 1.8 1
Chromium 36.1 ug/L 04/03/23 17:40 7440-47-304/03/23 09:415.0 1.3 1
Lead 46.6 ug/L 04/03/23 17:40 7439-92-104/03/23 09:4110.0 2.5 1
Selenium ND ug/L 04/03/23 17:40 7782-49-204/03/23 09:4120.0 9.2 1
Silver ND ug/L 04/03/23 17:40 7440-22-404/03/23 09:415.0 2.6 1
Analytical Method: EPA 7470A Preparation Method: EPA 7470A
Pace Analytical Services - Beaver
BVR 7470 Mercury
Mercury ND ug/L 04/02/23 17:42 7439-97-604/02/23 10:580.20 0.20 1
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.Date: 04/04/2023 12:30 PM
Pace Analytical Services, LLC
9800 Kincey Ave. Suite 100
Huntersville, NC 28078
[phone]
Page 7 of 15
#=AR#
ANALYTICAL RESULTS
Pace Project No.:
Project:
92658610
GROUNDWATER SAMPLING
Sample:MW-1 Lab ID:92658610004 Collected:03/23/23 13:50 Received:03/23/23 15:10 Matrix:Water
Parameters Results Units DF Prepared Analyzed CAS No.QualMDLLimit
Report
Analytical Method: EPA 6010D Preparation Method: EPA 3010A
Pace Analytical Services - Beaver
BVR 6010D ICP, Water, 3010A
Arsenic 7.5J ug/L 04/03/23 17:42 7440-38-204/03/23 09:4120.0 6.4 1
Barium 79.0 ug/L 04/03/23 17:42 7440-39-304/03/23 09:415.0 1.4 1
Cadmium ND ug/L 04/03/23 17:42 7440-43-904/03/23 09:412.0 1.8 1
Chromium 5.6 ug/L 04/03/23 17:42 7440-47-304/03/23 09:415.0 1.3 1
Lead 5.6J ug/L 04/03/23 17:42 7439-92-104/03/23 09:4110.0 2.5 1
Selenium ND ug/L 04/03/23 17:42 7782-49-204/03/23 09:4120.0 9.2 1
Silver ND ug/L 04/03/23 17:42 7440-22-404/03/23 09:415.0 2.6 1
Analytical Method: EPA 7470A Preparation Method: EPA 7470A
Pace Analytical Services - Beaver
BVR 7470 Mercury
Mercury ND ug/L 04/02/23 17:44 7439-97-604/02/23 10:580.20 0.20 1
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.Date: 04/04/2023 12:30 PM
Pace Analytical Services, LLC
9800 Kincey Ave. Suite 100
Huntersville, NC 28078
[phone]
Page 8 of 15
#=QC#
QUALITY CONTROL DATA
Pace Project No.:
Project:
92658610
GROUNDWATER SAMPLING
Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result.
QC Batch:
QC Batch Method:
Analysis Method:
Analysis Description:
577970
EPA 3010A
EPA 6010D
BVR 6010D MET
Laboratory:Pace Analytical Services - Beaver
Associated Lab Samples:92658610001, 92658610002, 92658610003, 92658610004
Parameter Units
Blank
Result
Reporting
Limit Qualifiers
METHOD BLANK:2806278
Associated Lab Samples:92658610001, 92658610002, 92658610003, 92658610004
Matrix:Water
AnalyzedMDL
Arsenic ug/L ND 20.0 04/03/23 16:586.4
Barium ug/L ND 5.0 04/03/23 16:581.4
Cadmium ug/L ND 2.0 04/03/23 16:581.8
Chromium ug/L ND 5.0 04/03/23 16:581.3
Lead ug/L ND 10.0 04/03/23 16:582.5
Selenium ug/L ND 20.0 04/03/23 16:589.2
Silver ug/L ND 5.0 04/03/23 16:582.6
Parameter Units
LCS
Result
% Rec
Limits Qualifiers% RecConc.
2806279LABORATORY CONTROL SAMPLE:
LCSSpike
Arsenic ug/L 19102000 95 80-120
Barium ug/L 19302000 96 80-120
Cadmium ug/L 9881000 99 80-120
Chromium ug/L 19302000 97 80-120
Lead ug/L 19302000 96 80-120
Selenium ug/L 18302000 92 80-120
Silver ug/L 464500 93 80-120
Parameter Units
MS
Result
% Rec
Limits Qual% RecConc.
2806282MATRIX SPIKE & MATRIX SPIKE DUPLICATE:
MSSpike
Result
92657560001
2806283
MSD
Result
MSD
% Rec RPD RPD
Max
MSDMS
Spike
Conc.
Arsenic ug/L 2000 104 80-12098 7 2020007.3J 2100 1960
Barium ug/L 2000 103 80-12095 7 20200011521802020
Cadmium ug/L 1000 105 80-12097 7 20100013.9 1060 986
Chromium ug/L 2000 103 80-12096 7 202000ND20701920
Lead ug/L 2000 102 80-12095 7 202000ND20501900
Selenium ug/L 2000 99 80-12092 7 202000ND19801840
Silver ug/L 500 101 80-12094 8 20500ND507469
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.Date: 04/04/2023 12:30 PM
Pace Analytical Services, LLC
9800 Kincey Ave. Suite 100
Huntersville, NC 28078
[phone]
Page 9 of 15
#=QC#
QUALITY CONTROL DATA
Pace Project No.:
Project:
92658610
GROUNDWATER SAMPLING
Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result.
QC Batch:
QC Batch Method:
Analysis Method:
Analysis Description:
577869
EPA 7470A
EPA 7470A
BVR 7470 Mercury
Laboratory:Pace Analytical Services - Beaver
Associated Lab Samples:92658610001, 92658610002, 92658610003, 92658610004
Parameter Units
Blank
Result
Reporting
Limit Qualifiers
METHOD BLANK:2806017
Associated Lab Samples:92658610001, 92658610002, 92658610003, 92658610004
Matrix:Water
AnalyzedMDL
Mercury ug/L ND 0.20 04/02/23 17:120.20
Parameter Units
LCS
Result
% Rec
Limits Qualifiers% RecConc.
2806018LABORATORY CONTROL SAMPLE:
LCSSpike
Mercury ug/L 11.410 114 80-120
Parameter Units
MS
Result
% Rec
Limits Qual% RecConc.
2806019MATRIX SPIKE & MATRIX SPIKE DUPLICATE:
MSSpike
Result
92657560001
2806020
MSD
Result
MSD
% Rec RPD RPD
Max
MSDMS
Spike
Conc.
Mercury ug/L 10 114 80-120117 2 2010ND11.5 11.7
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.Date: 04/04/2023 12:30 PM
Pace Analytical Services, LLC
9800 Kincey Ave. Suite 100
Huntersville, NC 28078
[phone]
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#=QL#
QUALIFIERS
Pace Project No.:
Project:
92658610
GROUNDWATER SAMPLING
DEFINITIONS
DF - Dilution Factor, if reported, represents the factor applied to the reported data due to dilution of the sample aliquot.
ND - Not Detected at or above adjusted reporting limit.
TNTC - Too Numerous To Count
J - Estimated concentration above the adjusted method detection limit and below the adjusted reporting limit.
MDL - Adjusted Method Detection Limit.
PQL - Practical Quantitation Limit.
RL - Reporting Limit - The lowest concentration value that meets project requirements for quantitative data with known precision and
bias for a specific analyte in a specific matrix.
S - Surrogate
1,2-Diphenylhydrazine decomposes to and cannot be separated from Azobenzene using Method 8270. The result for each analyte is
a combined concentration.
Consistent with EPA guidelines, unrounded data are displayed and have been used to calculate % recovery and RPD values.
LCS(D) - Laboratory Control Sample (Duplicate)
MS(D) - Matrix Spike (Duplicate)
DUP - Sample Duplicate
RPD - Relative Percent Difference
NC - Not Calculable.
SG - Silica Gel - Clean-Up
U - Indicates the compound was analyzed for, but not detected.
Acid preservation may not be appropriate for 2 Chloroethylvinyl ether.
A separate vial preserved to a pH of 4-5 is recommended in SW846 Chapter 4 for the analysis of Acrolein and Acrylonitrile by EPA
Method 8260.
N-Nitrosodiphenylamine decomposes and cannot be separated from Diphenylamine using Method 8270. The result reported for
each analyte is a combined concentration.
Reported results are not rounded until the final step prior to reporting. Therefore, calculated parameters that are typically reported as
"Total" may vary slightly from the sum of the reported component parameters.
Pace Analytical is TNI accredited. Contact your Pace PM for the current list of accredited analytes.
TNI - The NELAC Institute.
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.Date: 04/04/2023 12:30 PM
Pace Analytical Services, LLC
9800 Kincey Ave. Suite 100
Huntersville, NC 28078
[phone]
Page 11 of 15
#=CR#
QUALITY CONTROL DATA CROSS REFERENCE TABLE
Pace Project No.:
Project:
92658610
GROUNDWATER SAMPLING
Lab ID Sample ID QC Batch Method QC Batch Analytical Method
Analytical
Batch
92658610001 577970 578149DUP (MW-2)EPA 3010A EPA 6010D
92658610002 577970 578149MW-2 EPA 3010A EPA 6010D
92658610003 577970 578149MW-3 EPA 3010A EPA 6010D
92658610004 577970 578149MW-1 EPA 3010A EPA 6010D
92658610001 577869 577902DUP (MW-2)EPA 7470A EPA 7470A
92658610002 577869 577902MW-2 EPA 7470A EPA 7470A
92658610003 577869 577902MW-3 EPA 7470A EPA 7470A
92658610004 577869 577902MW-1 EPA 7470A EPA 7470A
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.Date: 04/04/2023 12:30 PM
Pace Analytical Services, LLC
9800 Kincey Ave. Suite 100
Huntersville, NC 28078
[phone]
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