WS-5641_19846_CA_MRP_20220907

20231597.001A | CLT22R144832 September 7, 2022
© 2022 Kleinfelder www.kleinfelder.com

KLEINFELDER 9009 Perimeter Woods Drive | Suite E, Charlotte, NC 28216 p| 704.598.1049

September 7, 2022

Ms. April Haley
Procter and Gamble Manufacturing Company
Post Office Box 18647
Greensboro, North Carolina 27419

SUBJECT: 2022 Follow-Up Groundwater Monitoring Report
Procter and Gamble Manufacturing Company
6200 Bryan Park Road
Browns Summit, North Carolina

Dear Ms. Haley:

Please find enclosed a copy of the Follow-Up Groundwater Monitoring Report conducted at
monitoring well MW-2R at the Browns Summit facility. All six monitoring wells were sampled per
request by the North Carolina Department of Environmental Quality. A copy of this report has
been submitted to the Guilford County Department of Environmental Health.

Kleinfelder appreciates this opportunity to provide groundwater monitoring services to Procter and
Gamble. Should questions arise or additional information be required, please contact the
undersigned or Ms. Christine Brenk at 704.378.9175.

Very truly yours,

KLEINFELDER, INC.

Thomas Sipe, PE
Project Professional

Michael J. Burns, PG
Program Manager

TS/MJB:wma
Enclosure(s)

20231597.001A | CLT22R144832 September 7, 2022
© 2022 Kleinfelder www.kleinfelder.com

© 2022 Kleinfelder
All Rights Reserved

ONLY THE CLIENT OR ITS DESIGNATED REPRESENTATIVES MAY USE THIS DOCUMENT AND ONLY FOR THE SPECIFIC
PROJECT FOR WHICH THIS REPORT WAS PREPARED.

2022 FOLLOW-UP GROUNDWATER MONITORING
REPORT
PROCTER AND GAMBLE MANUFACTURING COMPANY
BROWNS SUMMIT, NORTH CAROLINA

KLEINFELDER PROJECT NO.: 20231597.001A
September 7, 2022

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© 2022 Kleinfelder www.kleinfelder.com
TABLE OF CONTENTS
1.0 INTRODUCTION ............................................................................................................... 1
1.1 BACKGROUND ..................................................................................................... 1
1.2 INCIDENT HISTORY ............................................................................................ 1
1.3 RECEPTOR INFORMATION ................................................................................ 3

2.0 FIELD ACTIVITIES ........................................................................................................... 4
2.1 SITE HYDROLOGY .............................................................................................. 4
2.2 GROUNDWATER SAMPLING AND ANALYSIS ................................................... 4

3.0 RESULTS ......................................................................................................................... 5

4.0 CONCLUSIONS ................................................................................................................ 6

5.0 LIMITATIONS ................................................................................................................... 7

TABLES
1 Monitoring Well and Groundwater Elevation Data
2 Historical Groundwater Elevation Data
3 Summary of Groundwater Sample Results

FIGURES
1 Site Location Map
2 Site Plan
3 Monitoring Well Locations
4 Potentiometric Surface Map
5 Decamethylcyclopentasiloxane Concentration Compared with Groundwater Elevation

APPENDIX
Laboratory Report

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© 2022 Kleinfelder www.kleinfelder.com

2022 FOLLOW-UP GROUNDWATER MONITORING REPORT
PROCTER AND GAMBLE MANUFACTURING COMPANY
6200 BRYAN PARK ROAD, BROWNS SUMMIT, NORTH CAROLINA
1 INTRODUCTION

1.1 BACKGROUND
Kleinfelder has completed the Follow-Up Groundwater Monitoring Event for the Procter and
Gamble Manufacturing Company (P&G) facility located at 6200 Bryan Park Road in Browns
Summit, Guilford County, North Carolina (Figure 1 and Figure 2). The purpose of the groundwater
monitoring was to evaluate siloxane concentrations at monitoring wells surrounding a former
leaking UST.

1.2 INCIDENT HISTORY
The property is owned and operated by P&G and is used for the manufacture of personal care
products. A silicone product used in manufacturing antiperspirants was historically stored in a
portion of a segmented UST located on the west side of the facility (Figure 2). The 20,000-gallon
UST contained 10,000 gallons of capacity for the silicone fluid and 10,000 gallons of capacity for
perfume. The silicone fluid is an odorless, clear liquid containing decamethylcyclopentasiloxane
(CAS registration number 541-02-6) and mixed cyclosiloxanes (CAS registration number 69430-
24-6). The UST was filled with sand and closed in-place in August 1998.

Subsequent to the UST closure, monitoring well MW-1 was installed approximately 40 feet to the
east of the closed in-place tank. In April of 2001, Kleinfelder installed one monitoring well (MW-2)
adjacent to the UST formerly containing the silicone fluid. The base of the UST was within one
foot of the water table; therefore, soil samples were not collected. The monitoring well was
developed and groundwater samples were collected and analyzed for volatile organic compounds
(VOCs) by EPA Method 8260 and semi-volatile organic compounds (SVOCs) by EPA Method
8270 including a 10 peak library search. The laboratory identified decamethylcyclopentasiloxane,
dodecamethylcyclohexasiloxane, and octamethylcyclotetrasiloxane by the SVOC library search.
Since a North Carolina Groundwater Quality Standard (NCGQS) has not been established for
siloxanes, detectable concentrations over the laboratory detection limits [10 micrograms per liter
(µg/L)] serve as the practical groundwater standard. In January 2002, Kleinfelder installed three
additional Type II monitoring wells, MW-3, MW-4, and MW-6, and one Type III monitoring well,

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MW-5D, to determine the horizontal and vertical extent of the contamination. The monitoring well
locations are shown on Figure 3. All of the monitoring wells were sampled during the
comprehensive site assessment (CSA). The laboratory analytical results indicated that only two
of the 6 groundwater samples contained decamethylcyclopentasiloxane.
Decamethylcyclopentasiloxane was detected in monitoring well MW-1 at a concentration of 490
micrograms per liter (mg/L) and in MW-2 at a concentration of 320,000 mg/L.

A Corrective Action Plan (CAP) was written to address the siloxane compounds in the vicinity of
the UST. The CAP recommended Aggressive Fluid Vapor Recovery (AFVR) followed by natural
attenuation. On July 12, 2002, Kleinfelder initiated the first AFVR event at monitoring wells MW-
1 and MW-2. The radius of influence from each extraction well during the extraction event was
approximately 70 feet. The event lasted approximately eight hours and removed approximately
623 gallons of groundwater and silicone fluid. From July 12, 2002 to April 20, 2004, a total of 10
AFVR events were conducted at the site. Decamethylcyclopentasiloxane levels in MW-1
decreased from 490 μg/L to below the laboratory detection limits after the initial AFVR event.
During the same time period, decamethylcyclopentasiloxane levels in MW-2 fluctuated between
320,000 μg/L to 2,200 μg/L. The fluctuation in contaminant levels in the vicinity of the UST
indicated that contaminants in the soil were acting as a continuous source.

In June of 2004, Kleinfelder was contracted to remove the UST and surrounding soil backfill in an
attempt to remove the secondary source of decamethylcyclopentasiloxane to groundwater in the
vicinity of the UST. Monitoring well MW-2 was abandoned prior to the UST removal. Soil backfill
was excavated from the south and east sides of the UST and stockpiled for disposal. The UST
was buried approximately three feet below ground surface and was 12 feet in diameter and 24
feet in length. No holes or areas of extensive corrosion were observed. The tank was cleaned,
cut into scrap pieces, and taken to a metal recycling facility. Groundwater was observed seeping
through the concrete ballast pad at an approximate depth of 16 feet below ground surface. Soil
samples were not collected at the bottom of the excavation or sidewalls due to unstable conditions
and presence of groundwater at the bottom of the excavation. A total of 6,369 gallons of water
from the UST and 286 tons of stockpiled soil and sand were transported to a disposal facility.

Following the removal of the UST, monitoring well MW-2R was installed to a depth of 33 feet with
the screened interval from 13 to 33 feet. Monitoring well MW-1 had three sampling events with
siloxane concentrations below the laboratory detection limits. Therefore, only monitoring well

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MW-2R is typically sampled on an annual schedule. This report includes groundwater sample
analytical results for the sample collected from MW-2R on April 11, 2022.

1.3 RECEPTOR INFORMATION
Property within 1,500 feet of the source area is owned by P&G with the exception of the area to
the southwest of Bryan Park Road (Figure 1). One water supply well is located approximately 600
feet north of the source area on the P&G property; however, the well has never been used. Based
on the Division of Environmental Health Public Water Supply Section’s list of wellhead protection
areas, there are no wellhead protection areas within Guilford County.

The City of Greensboro receives its water supply from 3 surface water bodies: Lake Townsend,
Lake Brandt, and Lake Higgins. The lakes and their intakes are at least 3,000 feet from the source
area. Municipal water is available to the surrounding area.

The closest surface water feature to the source area is a manmade retention pond located
approximately 300 feet to the southwest (Figure 2). An unnamed tributary to Reedy Fork Creek
is located approximately 1,500 feet northwest of the source area. The tributary flows northeast
into Reedy Fork Creek that is dammed to form Hardy’s Mill Pond approximately 1,500 feet
northeast of the source area. Another unnamed tributary to Reedy Fork Creek is located
approximately 1,500 feet south of the source area.

The concrete paved area in the vicinity of the former UST has a trench drain that empties into the
retention pond located approximately 300 feet to the southwest (Figure 2). No other underground
utilities or structures have been identified in the source area.

Land use within 1,500 feet of the source area is primarily industrial and commercial; however, the
majority of the property is open or wooded, undeveloped land. The site and surrounding area are
zoned for industrial usage.

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2 FIELD ACTIVITIES

2.1 SITE HYDROLOGY
The depth to groundwater of the six monitoring wells at the site was measured on August 2, 2022.
The depth to groundwater ranged from approximately 15.75 to 21.17 feet below top of casing.
Groundwater and well construction details are summarized in Table 1. Information regarding
historical groundwater elevations is summarized in Table 2. A potentiometric surface map was
prepared and is presented in Figure 4. The potentiometric surface map shows groundwater flow
predominately to the southeast in the shallow unconfined aquifer. The groundwater is flowing
under an average gradient of 0.043 feet per foot, as measured between MW-3 to MW-2R and
0.068 as measured between MW-4 and MW-6.

Based on an average groundwater gradient of 0.055 feet per foot, a calculated hydraulic
conductivity of 1.0 foot per day from the bail down tests conducted at MW-4 during the CSA, and
an assumed porosity of 40-percent, the rate of groundwater flow was estimated to be about 0.14
feet per day (50.4 feet per year).

2.2 GROUNDWATER SAMPLING AND ANALYSIS
Groundwater samples were collected from monitoring wells on August 2, 2022. The groundwater
samples were sent to Waypoint Analytical, LLC (Waypoint) and analyzed for siloxanes by EPA
Method 8270D. Prior to collecting the groundwater samples, the static water level in the
monitoring wells were recorded and the monitoring wells were purged of approximately three well
volumes of water using a new disposable bailer. After allowing the water level to recover, the
groundwater samples were collected and placed in laboratory prepared containers. The
groundwater samples were maintained on ice until delivery to Waypoint. A chain-of-custody
document was utilized throughout the collection and transportation process and is included with
the laboratory report in the Appendix.

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3 RESULTS

Decamethylcyclopentasiloxane was detected in the groundwater sample collected from MW-2R
at an estimated concentration of 10.8 mg/L. No other groundwater samples were detected above
the reporting limit of 10 mg/L for decamethylcyclopentasiloxane and 50 mg/L
octamethylcyclotetrasiloxane. Groundwater laboratory analytical results are summarized in Table
3. Historical groundwater elevations were averaged and graphed to determine the range in
groundwater fluctuation and frequency across the site. In order to make a comparison of the
relative fluctuation of groundwater and contaminant concentration, contaminant levels from
monitoring well MW-2R were also graphed. Figure 5 shows the correlation between groundwater
elevation and contaminant concentration in MW-2R.

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4 CONCLUSIONS

Laboratory analytical results of groundwater samples collected from monitoring well MW-2R
indicated the presence of decamethylcyclopentasiloxane. The concentration of this constituent
detected during the August 2022 monitoring event was lower than the estimated concentration of
40.8 mg/L during the April 2021 event, though higher than the 5.49 mg/L observed during the April
2022 event. The concentration of this constituent has been trending downward since 2017.
Groundwater flow is to the southeast at an approximate rate of about 50 feet per year. No sensitive
receptors or groundwater users have been identified within 1,500 feet of the release. The adjacent
property in the direction of groundwater flow is more than 1,500 feet southeast of the former UST
location.

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5 LIMITATIONS

Kleinfelder offers various levels of investigative and engineering services to suit the varying needs
of different clients. It should be recognized that definition and evaluation of geologic and
environmental conditions are a difficult and inexact science. Judgments leading to conclusions
and recommendations are generally made with incomplete knowledge of the subsurface
conditions present due to the limitations of data from field studies. Although risk can never be
eliminated, more-detailed and extensive studies yield more information, which may help
understand and manage the level of risk. Since detailed study and analysis involves greater
expense, our clients participate in determining levels of service that provide adequate information
for their purposes at acceptable levels of risk.

During the course of the performance of Kleinfelder’s services, hazardous materials may have
been discovered. Kleinfelder assumes no responsibility or liability whatsoever for any claim, loss
of property value, damage, or injury that results from pre-existing hazardous materials being
encountered or present on the project site, or from the discovery of such hazardous materials.
Nothing contained in this report should be construed or interpreted as requiring Kleinfelder to
assume the status of an owner, operator, or generator, or person who arranges for disposal,
transport, storage or treatment of hazardous materials within the meaning of any governmental
statute, regulation or order. P&G is solely responsible for directing notification of all governmental
agencies, and the public at large, of the existence, release, treatment or disposal of any
hazardous materials observed at the project site, either before or during performance of
Kleinfelder’s services. P&G is responsible for directing all arrangements to lawfully store, treat,
recycle, dispose, or otherwise handle hazardous materials, including cuttings and samples
resulting from Kleinfelder’s services.

The information included on graphic representations in the Groundwater Monitoring Report has
been compiled from a variety of sources and is subject to change without notice. Kleinfelder
makes no representations or warranties, express or implied, as to accuracy, completeness,
timeliness, or rights to the use of such information. These documents are not intended for use as
a land survey product, nor are they designed or intended as a construction design document. The
use or misuse of the information contained on these graphic representations is at the sole risk of
the party using or misusing the information.

20231597.001A | CLT22R144832 September 7, 2022
© 2022 Kleinfelder www.kleinfelder.com
TABLES

WELL ID DATE
INSTALLED
SCREENED
INTERVAL
BOTTOM OF
WELL
(ft TOC)
TOP OF
CASING
ELEVATION
(ft TBM)
DEPTH TO
WATER
(ft TOC)
GROUNDWATER
ELEVATION
(ft TBM)
MW-1 12/08/98 14 - 29 30.00 100.00 21.17 78.83
MW-2R 06/25/04 13 - 33 33.00 96.41 18.08 78.33
MW-3 12/18/01 15 - 25 24.69 95.95 15.91 80.04
MW-4 12/18/01 15 - 25 24.00 96.28 15.75 80.53
MW-5D 12/19/01 53 - 58 57.35 96.68 17.58 79.10
MW-6 12/20/01 15 - 25 23.31 94.98 17.50 77.48
NOTES:
Groundwater Levels Measured on August 2, 2022
Temporary benchmark for elevation measurements is MW-1 at an assumed elevation of 100.00 feet
ft bgs = feet below ground surface
ft TOC = feet below top of well casing
ft TBM = feet below temporary benchmark
TABLE 1: MONITORING WELL AND GROUNDWATER ELEVATION DATA
20231597.001A
Copyright 2022 Kleinfelder 8/23/2022
MW-1 MW-2R MW-3 MW-4 MW-5D MW-6
04/29/02 79.08 78.89 79.35 78.97 79.22 79.24
07/12/02 78.74 78.90 78.97 80.19 78.87 77.38
08/26/02 79.26 79.40 79.39 79.24 79.03 77.63
10/07/02 79.44 79.57 79.62 81.11 79.52 78.12
11/08/02 80.45 80.67 80.68 82.11 80.57 79.09
01/20/03 80.51 80.70 79.93 81.87 80.69 79.00
03/27/03 81.25 81.46 81.44 82.59 81.33 79.77
06/05/03 81.24 81.45 81.44 82.58 81.28 78.70
07/24/03 81.23 81.50 81.46 82.49 81.27 80.50
09/26/03 80.94 81.24 80.86 80.90 81.02 79.42
04/20/04 79.84 80.04 79.97 81.26 80.06 78.35
11/16/04 79.46 79.54 79.76 81.01 79.70 78.13
11/15/05 78.61 78.58 78.86 79.97 78.64 77.14
01/26/06 79.92 80.03 80.19 79.73 80.08 80.07
04/17/06 79.57 79.63 79.33 79.36 79.65 79.66
04/17/07 79.99 80.02 80.15 81.60 80.16 78.70
04/01/08 79.06 79.07 79.34 80.65 79.74 77.72
04/09/09 79.71 79.78 79.95 81.15 79.74 78.23
06/08/10 79.42 79.64 79.74 80.85 79.6 77.93
04/18/11 79.05 79.19 79.32 80.97 79.57 77.74
04/04/12 79.27 79.09 79.75 81.30 79.64 78.19
04/15/13 79.25 78.84 79.54 81.07 79.75 77.84
04/08/14 79.78 79.36 80.00 81.63 79.80 78.39
04/22/15 81.08 81.66 82.05 82.84 81.13 80.44
04/29/16 79.15 78.71 79.30 80.88 79.38 77.68
04/25/17 78.93 78.38 78.98 80.90 79.19 77.74
04/19/18 79.57 79.16 79.62 81.27 79.64 78.17
04/26/19 79.96 79.45 79.48 81.27 79.76 79.42
04/22/20 79.60 79.20 79.84 81.32 79.93 78.15
04/23/21 79.87 79.41 80.10 81.56 80.27 78.38
04/11/22 79.57 79.16 80.10 81.29 79.98 78.08
08/02/22 78.83 78.33 80.04 80.53 79.10 77.48
NOTE:
ft TBM = feet below temporary benchmark
GROUNDWATER ELEVATION
(ft TBM)DATE
Temporary benchmark for elevation measurements is MW-1 at an assumed elevation of 100.00 feet
MW-2 was removed during the UST removal process. MW-2R was installed in the vicinity of the removed UST
on June 25, 2004
TABLE 2: HISTORICAL GROUNDWATER ELEVATION DATA
20231597.001A
Copyright 2022 Kleinfelder 8/23/2022
ANALYTICAL METHOD 8270 (Siloxanes only)
Contaminant of Concern
WELL ID DATE COLLECTED
11/14/01 490 < 40
06/11/02 < 10 < 10
07/25/02 < 10 < 10
11/16/04 < 10 < 10
04/22/20 < 10 < 50
08/02/22 < 5.20 < 25.9
MW-2 11/14/01 320,000 < 20,000
06/11/02 150,000 < 10,000
07/25/02 140,000 < 5,000
09/03/02 62,000 < 4,000
10/14/02 4,300 < 1,000
11/18/02 7,800 < 1,000
02/05/03 59,000 < 1,000
04/08/03 36,000 < 2,000
06/05/03 2,200 < 2000
08/01/03 8,000 < 2,000
10/06/03 49,000 < 4000
04/26/04 101,000 1,340
06/25/04 1,210 < 50
11/16/04 2,310 < 200
11/15/05 < 10 < 10
01/26/06 64 35.9
04/17/06 448 < 40
04/17/07 159 < 20
04/01/08 40.7 <5.1
04/09/09 160 15.3
06/08/10 184 13.5
04/18/11 176 < 27.4
04/04/12 1,170 < 52.6
04/15/13 160 3.3
04/08/14 540 11 A
04/22/15 650 16
04/29/16 44 < 10
04/25/17 250 E < 10
04/19/18 220 5.3 J
04/26/19 190 < 51
04/22/20 65 < 50
04/23/21 40.8 <25.3
04/11/22 5.49 J <25.5
08/02/22 10.8 <25.0
12/28/01 < 10 < 10
04/22/20 < 10 < 50
08/02/22 < 5.00 < 25.0
12/28/01 < 10 < 10
04/22/20 < 10 < 50
08/02/22 < 5.00 < 25.0
01/02/02 < 10 < 10
04/22/20 < 10 < 50
08/02/22 < 5.20 < 26.1
12/28/01 < 10 < 10
04/22/20 < 10 < 50
08/02/22 < 5.00 < 25.0
NOTES:
E = Estimated concentration above calibration range
J = Estimated concentration below the Reporting Limit
2L Groundwater Standards have not been established for the compounds detected
μg/L = micrograms per liter
A = Analyte reported with possible low bias. Laboratory control sample recovery below the quality control limit.
MW-6
Decamethylcyclopentasiloxane
(μg/L)
Octamethylcyclotetrasiloxane
(μg/L)
TABLE 3: SUMMARY OF GROUNDWATER SAMPLE RESULTS
MW-5D
MW-1
MW-3
MW-4
MW-2R
20231597.001A
Copyright 2022 Kleinfelder 8/23/2022

20231597.001A | CLT22R144832 September 7, 2022
© 2022 Kleinfelder www.kleinfelder.com
FIGURES

DATE: 08-25-2022
PROJECT NO: 20231597.001A
SCALE: 1" = 2,000'
APPROVED BY:
SOURCE: USGS 7.5' TOPOGRAPHIC MAP,BROWNS SUMMIT QUADRANGLE
Procter & Gamble Manufacturing Co.
6200 Bryan Park Road
Browns Summit, North Carolina
FIGURE 1
SITE LOCATION MAP x3500 Gateway Centre Blvd., Suite 200
Morrisville, NC 27560
Phone: [phone]
www.kleinfelder.com
SITE
PONDx RAILROAD TRACKSSUPPLY
WELL
TRENCH
DRAIN
INVESTIGATION
AREA
BRYAN PARK
ROAD
SUMMIT AVENUEThe information included on this graphic representation has been compiled from a variety of
sources and is subject to change without notice. Kleinfelder makes no representations or
warranties, express or implied, as to accuracy, completeness, timeliness, or rights to the use of
such information. This document is not intended for use of a land survey product nor is itdesigned or intended as a construction design document. The use or misuse of the informationcontained on this graphic representation is at the sole risk of the party using or misusing theinformation.
DATE: 08-25-2022
PROJECT NO: 20231597.001A
SCALE: 1" = 400'
APPROVED BY:
DRAWN BY: TS/NL
Procter & Gamble Manufacturing Co.
6200 Bryan Park Road
Browns Summit, North Carolina
FIGURE 2
SITE PLAN
3500 Gateway Centre Blvd., Suite 200
Morrisville, NC 27560
Phone: [phone]
www.kleinfelder.com
MONITORING WELL LOCATION
LEGEND
MW-1
The information included on this graphic representation has been compiled from a variety ofsources and is subject to change without notice. Kleinfelder makes no representations or
warranties, express or implied, as to accuracy, completeness, timeliness, or rights to the use of
such information. This document is not intended for use of a land survey product nor is it
designed or intended as a construction design document. The use or misuse of the information
contained on this graphic representation is at the sole risk of the party using or misusing theinformation.
0 20 40 80
GRAPHIC SCALE xTRACK CTRACK AMW-4
MW-1
MW-5D
MW-6
MW-3TRENCH DRAINTANK FARM
MW-2R
CATCH
BASIN
FORMER
PERFUME UST
FORMER SILICONE/
PERFUME UST
SHED
SILO
SILO
DATE: 08-25-2022
PROJECT NO: 20231597.001A
SCALE: 1" = 40'
APPROVED BY:
Procter & Gamble Manufacturing Co.
6200 Bryan Park Road
Browns Summit, North Carolina
FIGURE 3
MONITORING WELL LOCATIONS
DRAWN BY: TS/NL
3500 Gateway Centre Blvd., Suite 200
Morrisville, NC 27560
Phone: [phone]
www.kleinfelder.com
MONITORING WELL LOCATION WITH
GROUNDWATER ELEVATION
GROUNDWATER CONTOUR LINE
LEGEND
MW-1
(79.87)
80.00
GROUNDWATER ELEVATIONS WERE MEASURED AUGUST 2, 2022.
MONITORING WELL MW-5D IS SCREENED BELOW THE WATER
TABLE AND WAS NOT USED TO GENERATE GROUNDWATER
CONTOUR LINES.
The information included on this graphic representation has been compiled from a variety of
sources and is subject to change without notice. Kleinfelder makes no representations or
warranties, express or implied, as to accuracy, completeness, timeliness, or rights to the use ofsuch information. This document is not intended for use of a land survey product nor is itdesigned or intended as a construction design document. The use or misuse of the informationcontained on this graphic representation is at the sole risk of the party using or misusing the
information.
0 20 40 80
GRAPHIC SCALE xTRACK CTRACK ATRENCH DRAINTANK FARMCATCH
BASIN
FORMER
PERFUME UST
FORMER SILICONE/
PERFUME UST
MW-1
(78.83)
MW-6
(77.48)
MW-4
MW-2R
(78.33)
MW-3
(80.04)
MW-5D
(79.10)
(80.53)
DIRECTION OF GROUNDWATER FLOW80.00
SHED
SILO
SILO
77.5
78.0
78.579.0
79.5
80.0
DATE: 08-25-2022
PROJECT NO: 20231597.001A
SCALE: 1" = 40'
APPROVED BY:
Procter & Gamble Manufacturing Co.
6200 Bryan Park Road
Browns Summit, North Carolina
FIGURE 4
POTENTIOMETRIC SURFACE MAP
DRAWN BY: TS/NL
3500 Gateway Centre Blvd., Suite 200
Morrisville, NC 27560
Phone: [phone]
www.kleinfelder.com
77787980818283841101001,00010,000100,0001,000,000Nov-01 May-03 Nov-04 May-06 Nov-07 May-09 Nov-10 May-12 Nov-13 May-15 Nov-16 May-18 Nov-19 May-21 Nov-22
Groundwater Elevation (ft TBM)
Concentration (ug/L)DateFigure 5: Decamethylcyclopentasiloxane Concentration Compared with Groundwater ElevationMW-2 DMCPS ConcentrationAverage Groundwater ElevationNote:DMCPS = Decamethylcyclopentasiloxane

20231597.001A | CLT22R144832 September 7, 2022
© 2022 Kleinfelder www.kleinfelder.com
APPENDIX A
LABORATORY REPORT

Laboratory's liability in any claim relating to analyses performed shall be limited to, at laboratory's option, repeating the
analysis in question at laboratory's expense, or the refund of the charges paid for performance of said analysis.

8/22/2022
Kleinfelder SE, Inc. (Charlotte) Tom Sipe
9009 Perimeter Woods Drive Suite E Charlotte, NC, 28216
Ref: Analytical Testing
Lab Report Number: 22-215-0004 Client Project Description: P&G
Dear Tom Sipe:
Waypoint Analytical, LLC (Charlotte) received sample(s) on 8/3/2022 for the analyses presented in the
following report.
The above referenced project has been analyzed per your instructions. The analyses were performed in accordance with the applicable analytical method.
The analytical data has been validated using standard quality control measures performed as required by the
analytical method. Quality Assurance, method validations, instrumentation maintenance and calibration for all parameters were performed in accordance with guidelines established by the USEPA (including 40 CFR 136
Method Update Rule May 2021) unless otherwise indicated. Certain parameters (chlorine, pH, dissolved oxygen, sulfite...) are required to be analyzed within 15 minutes of sampling. Usually, but not always, any field parameter analyzed at the laboratory is outside of this holding time.
Refer to sample analysis time for confirmation of holding time compliance.
The results are shown on the attached Report of Analysis(s). Results for solid matrices are reported on an as-received basis unless otherwise indicated. This report shall not be reproduced except in full and relates only to
the samples included in this report. Please do not hesitate to contact me or client services if you have any questions or need additional information. Sincerely,
Angela D Overcash Senior Project Manager
Page 1 of 14
Certification Summary
Laboratory ID: WP CNC: Waypoint Analytical Carolina, Inc. (C), Charlotte, NC
State Program Lab ID Expiration Date
07/31/202337735State ProgramNorth Carolina
12/31/2022402State ProgramNorth Carolina
07/31/202299012State ProgramSouth Carolina
12/31/202299012State ProgramSouth Carolina
Page 1 of 1 00016/22-215-0004
Page 2 of 14
Report Number:
Sample Summary Table
Client Project Description:
22-215-0004
P&G
Lab No Client Sample ID Matrix Date Collected Date Received
08/02/2022 10:38Aqueous 95914 MW-1 08/03/2022 08:57
08/02/2022 10:45Aqueous 95915 MW-2R 08/03/2022 08:57
08/02/2022 09:54Aqueous 95916 MW-3 08/03/2022 08:57
08/02/2022 09:05Aqueous 95917 MW-4 08/03/2022 08:57
08/02/2022 10:18Aqueous 95918 MW-5D 08/03/2022 08:57
08/02/2022 09:25Aqueous 95919 MW-6 08/03/2022 08:57
Page 3 of 14
Summary of Detected Analytes
QualifiersAnalyzedUnitsResult
Report Number:
Client Sample ID
Method Parameters
Lab Sample ID
22-215-0004
Report Limit
Project:P&G
V 95915MW-2R
10.8 08/10/2022 02:388270EDecamethylcyclopentasiloxaneµg/L 5.00
Page 4 of 14

Client: Kleinfelder SE, Inc. (Charlotte) CASE NARRATIVE
Project: P&G Lab Report Number: 22-215-0004
Date: 8/16/2022
Semivolatile Organic Compounds - GC/MS Method 8270E Analyte: Decamethylcyclopentasiloxane QC Batch No: V22750/V22457
LCSD not prepped for this analyte.
Analyte: Decamethylcyclopentasiloxane QC Batch No: V22750/V22457
This target analyte was flagged for recoveries outside QC limits in the associated LCS/LCSD. Data for this analyte is flagged "M" to indicate that results should be considered minimum concentration due to the potential for
a low bias.
Analyte: Nitrobenzene-d5 QC Batch No: V22750/V22457
Surrogate recover is bleow range.
Analyte: Octamethylcyclotetrasiloxane QC Batch No: V22750/V22457
LCSD not prepped for this analyte.
Analyte: Octamethylcyclotetrasiloxane QC Batch No: V22750/V22457 This target analyte was flagged for recoveries outside QC limits in the associated LCS/LCSD. Data for this analyte is flagged "M" to indicate that results should be considered minimum concentration due to the potential for
a low bias.

Page 5 of 14
,
REPORT OF ANALYSISReport Number :
Project
Information :
NC 28216
22-215-0004
01122
Kleinfelder SE, Inc. (Charlotte)
9009 Perimeter Woods Drive Suite E
Tom Sipe
Charlotte
Angela D Overcash
Senior Project Manager
Received : 08/03/2022
P&G
Report Date : 08/22/2022
Sample ID :
Lab No :
Sampled:MW-1
95914 Matrix:
8/2/2022 10:38
Aqueous
Test Results Units MDL MQL By Analytical
Method
Date / Time
Analyzed
DF
<5.20 µg/L 5.20 10.4Decamethylcyclopentasiloxane 1 08/10/22 02:16 8270EJMV
<25.9 µg/L 25.9 51.8Octamethylcyclotetrasiloxane 1 08/10/22 02:16 8270EJMV
Surrogate: 2-Fluorobiphenyl 51.4 Limits: 44-119%08/10/22 02:161 JMV V22750
Surrogate: Nitrobenzene-d5 44.8 Limits: 44-120%08/10/22 02:161 JMV V22750
Surrogate: 4-Terphenyl-d14 61.6 Limits: 50-134%08/10/22 02:161 JMV V22750
Qualifiers/
Definitions
Method Quantitation LimitMQLDilution FactorDF
Page 6 of 14
,
REPORT OF ANALYSISReport Number :
Project
Information :
NC 28216
22-215-0004
01122
Kleinfelder SE, Inc. (Charlotte)
9009 Perimeter Woods Drive Suite E
Tom Sipe
Charlotte
Angela D Overcash
Senior Project Manager
Received : 08/03/2022
P&G
Report Date : 08/22/2022
Sample ID :
Lab No :
Sampled:MW-2R
95915 Matrix:
8/2/2022 10:45
Aqueous
Test Results Units MDL MQL By Analytical
Method
Date / Time
Analyzed
DF
10.8 µg/L 5.00 10.0Decamethylcyclopentasiloxane 1 08/10/22 02:38 8270EJMV
<25.0 µg/L 25.0 50.0Octamethylcyclotetrasiloxane 1 08/10/22 02:38 8270EJMV
Surrogate: 2-Fluorobiphenyl 65.2 Limits: 44-119%08/10/22 02:381 JMV V22750
Surrogate: Nitrobenzene-d5 58.0 Limits: 44-120%08/10/22 02:381 JMV V22750
Surrogate: 4-Terphenyl-d14 60.8 Limits: 50-134%08/10/22 02:381 JMV V22750
Qualifiers/
Definitions
Method Quantitation LimitMQLDilution FactorDF
Page 7 of 14
,
REPORT OF ANALYSISReport Number :
Project
Information :
NC 28216
22-215-0004
01122
Kleinfelder SE, Inc. (Charlotte)
9009 Perimeter Woods Drive Suite E
Tom Sipe
Charlotte
Angela D Overcash
Senior Project Manager
Received : 08/03/2022
P&G
Report Date : 08/22/2022
Sample ID :
Lab No :
Sampled:MW-3
95916 Matrix:
8/2/2022 9:54
Aqueous
Test Results Units MDL MQL By Analytical
Method
Date / Time
Analyzed
DF
<5.00 µg/L 5.00 10.0Decamethylcyclopentasiloxane 1 08/10/22 01:31 8270EJMV
<25.0 µg/L 25.0 50.0Octamethylcyclotetrasiloxane 1 08/10/22 01:31 8270EJMV
Surrogate: 2-Fluorobiphenyl 70.8 Limits: 44-119%08/10/22 01:311 JMV V22750
Surrogate: Nitrobenzene-d5 65.0 Limits: 44-120%08/10/22 01:311 JMV V22750
Surrogate: 4-Terphenyl-d14 72.6 Limits: 50-134%08/10/22 01:311 JMV V22750
Qualifiers/
Definitions
Method Quantitation LimitMQLDilution FactorDF
Page 8 of 14
,
REPORT OF ANALYSISReport Number :
Project
Information :
NC 28216
22-215-0004
01122
Kleinfelder SE, Inc. (Charlotte)
9009 Perimeter Woods Drive Suite E
Tom Sipe
Charlotte
Angela D Overcash
Senior Project Manager
Received : 08/03/2022
P&G
Report Date : 08/22/2022
Sample ID :
Lab No :
Sampled:MW-4
95917 Matrix:
8/2/2022 9:05
Aqueous
Test Results Units MDL MQL By Analytical
Method
Date / Time
Analyzed
DF
<5.00 µg/L 5.00 10.0Decamethylcyclopentasiloxane 1 08/10/22 00:47 8270EJMV
<25.0 µg/L 25.0 50.0Octamethylcyclotetrasiloxane 1 08/10/22 00:47 8270EJMV
Surrogate: 2-Fluorobiphenyl 68.4 Limits: 44-119%08/10/22 00:471 JMV V22750
Surrogate: Nitrobenzene-d5 64.2 Limits: 44-120%08/10/22 00:471 JMV V22750
Surrogate: 4-Terphenyl-d14 58.0 Limits: 50-134%08/10/22 00:471 JMV V22750
Qualifiers/
Definitions
Method Quantitation LimitMQLDilution FactorDF
Page 9 of 14
,
REPORT OF ANALYSISReport Number :
Project
Information :
NC 28216
22-215-0004
01122
Kleinfelder SE, Inc. (Charlotte)
9009 Perimeter Woods Drive Suite E
Tom Sipe
Charlotte
Angela D Overcash
Senior Project Manager
Received : 08/03/2022
P&G
Report Date : 08/22/2022
Sample ID :
Lab No :
Sampled:MW-5D
95918 Matrix:
8/2/2022 10:18
Aqueous
Test Results Units MDL MQL By Analytical
Method
Date / Time
Analyzed
DF
<5.20 µg/L 5.20 10.4Decamethylcyclopentasiloxane 1 08/10/22 01:54 8270EJMV
<26.1 µg/L 26.1 52.1Octamethylcyclotetrasiloxane 1 08/10/22 01:54 8270EJMV
Surrogate: 2-Fluorobiphenyl 71.8 Limits: 44-119%08/10/22 01:541 JMV V22750
Surrogate: Nitrobenzene-d5 67.4 Limits: 44-120%08/10/22 01:541 JMV V22750
Surrogate: 4-Terphenyl-d14 68.9 Limits: 50-134%08/10/22 01:541 JMV V22750
Qualifiers/
Definitions
Method Quantitation LimitMQLDilution FactorDF
Page 10 of 14
,
REPORT OF ANALYSISReport Number :
Project
Information :
NC 28216
22-215-0004
01122
Kleinfelder SE, Inc. (Charlotte)
9009 Perimeter Woods Drive Suite E
Tom Sipe
Charlotte
Angela D Overcash
Senior Project Manager
Received : 08/03/2022
P&G
Report Date : 08/22/2022
Sample ID :
Lab No :
Sampled:MW-6
95919 Matrix:
8/2/2022 9:25
Aqueous
Test Results Units MDL MQL By Analytical
Method
Date / Time
Analyzed
DF
<5.00 µg/L 5.00 10.0Decamethylcyclopentasiloxane 1 08/10/22 01:09 8270EJMV
<25.0 µg/L 25.0 50.0Octamethylcyclotetrasiloxane 1 08/10/22 01:09 8270EJMV
Surrogate: 2-Fluorobiphenyl 64.2 Limits: 44-119%08/10/22 01:091 JMV V22750
Surrogate: Nitrobenzene-d5 57.8 Limits: 44-120%08/10/22 01:091 JMV V22750
Surrogate: 4-Terphenyl-d14 65.8 Limits: 50-134%08/10/22 01:091 JMV V22750
Qualifiers/
Definitions
Method Quantitation LimitMQLDilution FactorDF
Page 11 of 14
Quality Control Data
22-215-0004Report No:
Project Description:
Client ID:Kleinfelder SE, Inc. (Charlotte)
P&G
QC Prep Batch Method:
Semivolatile Organic Compounds - GC/MS
8270E
V22750QC Analytical Batch(es):
Analysis Method:
Analysis Description:
3510C
QC Prep:V22457
Associated Lab Samples: 95914, 95915, 95916, 95917, 95918, 95919
LRB-V22457 Matrix: AQULab Reagent Blank
Parameter
AnalyzedMQLMDLBlank
ResultUnits
%
Recovery
% Rec
Limits
08/09/22 22:1110.05.00<5.00µg/LDecamethylcyclopentasiloxane
08/09/22 22:1150.025.0<25.0µg/LOctamethylcyclotetrasiloxane
08/09/22 22:112-Fluorobiphenyl (S)46.4 44-119
08/09/22 22:112-Fluorophenol (S)27.9 19-119
08/09/22 22:11Nitrobenzene-d5 (S)42.2 44-120
08/09/22 22:114-Terphenyl-d14 (S)77.2 50-134
08/09/22 22:112,4,6-Tribromophenol (S)59.4 43-140
08/09/22 22:11Phenol-d5 (S)19.4 11-100
LCS-V22457Laboratory Control Sample
Parameter
LCS %RecLCS
Result
Spike
Conc.Units
% Rec
Limits
16.0*8.0250.0µg/LDecamethylcyclopentasiloxane 59-123
0.0*<25.050.0µg/LOctamethylcyclotetrasiloxane 10-135
LCS-V22457 LCSD-V22457Laboratory Control Sample & LCSD
LCSD
ResultParameter
LCSD
% Rec
LCS
%Rec
LCS
Result
Spike
Conc.Units
% Rec
Limits
62.462.22-Fluorobiphenyl (S)44-119
31.634.02-Fluorophenol (S)19-119
47.649.2Nitrobenzene-d5 (S)44-120
75.278.24-Terphenyl-d14 (S)50-134
71.571.82,4,6-Tribromophenol (S)43-140
22.824.4Phenol-d5 (S)11-100
Page 1 of 1* QC Fail Date:08/22/2022 12:36 PM
Page 12 of 14
Fed Ex
UPS
US Postal
Client
Lab
Courier
Other :
Shipment Receipt Form
Customer Number:
Customer Name:
Report Number:22-215-0004
Kleinfelder SE, Inc. (Charlotte)
01122
Shipping Method
Shipping container/cooler uncompromised?
Thermometer ID:IRT-15 3.8C
Chain of Custody (COC) present?Yes No
Yes No Not Present
Yes No Not Present
Yes No
COC agrees with sample label(s)? Yes No
COC properly completed
Samples in proper containers?
Sample containers intact?
Sufficient sample volume for indicated test(s)?
All samples received within holding time?
Cooler temperature in compliance?
Yes No
Yes No
Yes No
Yes No
Yes No
Yes NoCooler/Samples arrived at the laboratory on ice.
Samples were considered acceptable as cooling
process had begun.
Yes No
Yes No N/A
Yes No N/A
Yes No N/ASoil VOA method 5035 – compliance criteria met
Water - Sample containers properly preserved
Water - VOA vials free of headspace Yes No N/A
Trip Blanks received with VOAs
Low concentration EnCore samplers (48 hr)
High concentration pre-weighed (methanol -14 d) Low conc pre-weighed vials (Sod Bis -14 d)
High concentration container (48 hr)
Custody seals intact on shipping container/cooler?
Custody seals intact on sample bottles?
Number of coolers/boxes received
Yes No
1
Signature:Angelo Norvell Date & Time:08/03/2022 10:05:15
Special precautions or instructions included?
Comments:
Page 13 of 14
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