WS-7691_7691_CA_RMR_20200630

20210520.001A | RAL20R113460 June 30, 2020
© 2020 Kleinfelder www.kleinfelder.com

KLEINFELDER 3200 Gateway Centre Blvd. Suite 100, Morrisville, NC 27560 p | 919.755.5011 f | 919.755.1414

June 30, 2020
Kleinfelder File No. RAL20R113460

Mr. Ryan Crosbie
APAC-Atlantic, Inc.
900 Ashwood Parkway | Suite 700
Atlanta, Georgia 30338

SUBJECT: Semi-Annual Groundwater Monitoring Report
Former GNC Energy
Incident No. 7691
100 South Chimney Rock Road
Greensboro, Guilford County, North Carolina
Kleinfelder File No. 20210520.001A

Dear Mr. Crosbie:

Kleinfelder is pleased to provide its report detailing the groundwater sampling event conducted at
the subject site in June 2020 as required by the North Carolina Department of Environmental
Quality (NCDEQ).

A copy of this report (paper and electronic) has been forwarded to Mr. Gene Mao of the Guilford
County Department of Environmental Health. Kleinfelder appreciates the opportunity to be of
service to you. Should you have questions or require additional information, please do not hesitate
to contact the undersigned.

Sincerely,
KLEINFELDER, INC.
Firm License No. F-1312

Abigail R. Shurtleff
Staff Professional II

Michael J. Burns, PG
Environmental Program Manager

MJB/ARS:asp
Enclosure

cc: Gene Mao, Guilford County

20210520.001A | RAL20R113460 June 30, 2020
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SEMI-ANNUAL GROUNDWATER MONITORING REPORT
FORMER GNC ENERGY
INCIDENT NO. 7691
100 S. CHIMNEY ROCK ROAD
GREENSBORO, NORTH CAROLINA

PROJECT NO. 20210520.001A

JUNE 30, 2020

Copyright 2020 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.

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SEMI-ANNUAL GROUNDWATER MONITORING REPORT

SITE INFORMATION

SITE NAME AND LOCATION: Former GNC Energy
100 South Chimney Rock Road
Greensboro, Guilford County, North Carolina

FACILITY ID NO.: Unknown

LATITUDE AND LONGITUDE: 36.075472‘N/79.920222‘W

INCIDENT NO.: 7691

LAND USE CATEGORY: Industrial/Commercial

DATE OF REPORT: June 30, 2020

PROPERTY OWNER: AA Properties — Greensboro, Inc.
PO Box 12626
Roanoke, Virginia 24027
336-294-0025

CONSULTANT: Kleinfelder, Inc.
3200 Gateway Centre Blvd. | Suite 100
Raleigh, North Carolina 27560
Attention: Mr. Michael Burns
Phone: [phone]

RELEASE INFORMATION: The release addressed in this report originated from a leak from
underground piping discovered in 1987.

SEAL AND SIGNATURE OF CERTIFYING LICENSED GEOLOGIST
I, Michael J. Burns, PG, a Licensed Geologist for Kleinfelder, Inc., do certify that the information
contained in this report is correct and accurate to the best of my knowledge.

Michael J. Burns, PG
License No. 1645

Kleinfelder, Inc. is allowed to practice Geology | Engineering in North Carolina. The certification
numbers of the corporation are C-521 | F-1312.

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TABLE OF CONTENTS

1 BACKGROUND .............................................................................................................. 1
1.1 SUMMARY OF REMEDIAL ACTIVITIES ............................................................ 2

2 PURPOSE ....................................................................................................................... 9

3 METHODS .................................................................................................................... 10
3.1 MONITORING WELL SAMPLING ......................................................................10

4 RESULTS ..................................................................................................................... 11
4.1 GROUNDWATER FLOW DIRECTION ..............................................................11
4.2 MONITORING WELL SAMPLING RESULTS ....................................................11

5 CONCLUSIONS ............................................................................................................ 13

6 RECOMMENDATIONS ................................................................................................. 14

7 LIMITATIONS ............................................................................................................... 15

TABLES
1 Well Construction Details
2 Groundwater Elevations
3 Historical Groundwater Elevation Data
4 Field Natural Attenuation Data
5 Historical Field Natural Attenuation Data
6 Groundwater Sample Analytical Results
7 Historical Groundwater Analytical Results

FIGURES
1 Project Location
2 Plant Layout Map
2a Site Map with Monitoring Well Locations
3 Shallow Potentiometric Surface
4 Deep Potentiometric Surface
5 Shallow Benzene Concentrations
6 Deep Benzene Iso-concentrations

GRAPHS
1 MW-27 Benzene vs. Water Level
2 MW-21 Benzene vs. Water Level
3 MW-17 Benzene vs. Water Level
4 MW-21D Benzene vs. Water Level

APPENDICES
A Laboratory Report and Chain-of-Custody Document

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SEMI-ANNUAL GROUNDWATER
MONITORING REPORT
FORMER GNC ENERGY
INCIDENT NO. 7691
100 S. CHIMNEY ROCK ROAD, GREENSBORO, NORTH CAROLINA

1 BACKGROUND

The site is located at 100 S. Chimney Rock Road in Greensboro, Guilford County, North Carolina
(Figure 1). The site consists of approximately 12 acres of industrially developed land located
southwest of the intersection of W. Market Street and S. Chimney Rock Road in Greensboro,
North Carolina.

A review of site information obtained from previous environmental reports indicates that the
site has been used for bulk petroleum storage since the late 1940s. The current owner AA
Properties – Greensboro, Inc., purchased the property in 2004. AA Properties – Greensboro,
Inc. currently uses the site to store liquid asphalt for distribution. There are bulk above ground
storage tanks, above ground product lines, and a storm water retention pond located within a
clay-lined secondary containment basin. There is also a truck loading rack, warehouse
building, office building, covered storage/mix area, railroad spur and asphalt parking and
driveway areas on the site. The railroad spur is located in the northern portion of the site.
The site is completely fenced to prevent unauthorized access.

The bulk above ground storage tanks located on the property are shown on Figure 2 in the
Appendix.
AST SIZE (GALLONS) CONTENTS
1,008,000 Liquid Asphalt
2 each - 1,050,000 Liquid Asphalt
4 each - 630,000 Liquid Asphalt
1,260,000 Liquid Asphalt
2,184,000 Liquid Asphalt
15,000 #2 Fuel Oil
10,000 #2 Fuel Oil
1,100,000 Liquid Asphalt

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AST SIZE (GALLONS) CONTENTS
2,268,000 Liquid Asphalt
6 each - 40,000 Liquid Asphalt
210,000 Liquid Asphalt
10,000 Mineral Oil based asphalt additive
8,017 AD-Here Fatty amine asphalt additive
3,049 AD-Here Fatty amine asphalt additive
7,630 x 3 compartments Fatty amine asphalt additive
2 each - 8,000 PMA Process/Mix Tank
3 each – 440 Hot Oil

The adjoining properties include the TransMontaigne Operating Co. (formerly Unocal, Gulf Oil,
Louis Drufus) to the west; the property to the south is the City of Greensboro waste transfer station
(former American Beverage Company); the property to the east across Chimney Rock Road
is Motiva Enterprises (former Texaco and Saudi Refining Companies); and a railroad to the north.

Figures from previous reports and topographic maps indicated that there was a Texaco pipeline
located to the south of the property line. Current topographic maps do not show the pipeline.

1.1 SUMMARY OF REMEDIAL ACTIVITIES
The Former GNC Energy facility is located at 100 S. Chimney Rock Road in Greensboro, Guilford
County, North Carolina (Figure 1). A site plan of the facility is provided as Figure 2a. Based
on review of groundwater quality data, there appears to be at least 3 separate plumes. Several
phases of assessment activities have been performed at the site since 1987.

A summary, as provided in previous reports, of the assessment and remedial activities that
have occurred at the site is provided below.

Based on a Remedial Action Plan prepared by Hatcher Incorporated dated March 20, 1987,
NCDEQ determined that there had been a petroleum release from GNC Energy’s transmission
lines in February 1987. Five test pits were dug to evaluate the location of the petroleum
release. The release was originally discovered in a sump reportedly about 500 feet down-
gradient from the origin. Free product was pumped from the excavated test pits and the sump
to holding tanks on the GNC Energy property. The soils in the excavation pits were described

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as heavy clay or saprolite. It was believed that the release was migrating along the numerous
pipeline trenches on the property.

In January 1990, a Proposed Study Plan was prepared by Bain & Palmer, Inc. to evaluate the
magnitude of the petroleum release as directed by a Special Order of Consent prepared by the
North Carolina Environmental Management Commission. The plan provided details on the soil
and groundwater study proposed to evaluate the release.

Based on information provided in an April 30, 1990, Hydrogeologic Investigation report, a soil
gas survey, water supply well inventory, soil sampling, monitoring well installation and
groundwater sampling was conducted on the property in February, March and April of 1990.

The soil gas survey noted elevated organic vapor analyzer (OVA) readings at the truck loading
rack, petroleum distillation unit, and near aboveground storage tanks #1, (near current
MW-6), #4 (near current MW-13), #5 (near current MW-16 and MW- 13), and #9 (near current
MW-4). Soil samples collected in the areas of the elevated organic vapor analyzer (OVA)
readings indicated concentrations above regulatory levels that were reported as kerosene,
diesel and gasoline. A well inventory noted 16 nearby properties with water supply wells, as
well as an onsite water supply well at a depth of 85 feet. As part of the investigation 6 shallow
monitoring wells (MW-1 through MW-6) were installed to depths ranging from 18 feet to 20
feet below the ground surface (bgs), with 15 feet of well screen. Groundwater laboratory
results indicated contamination above regulatory levels in all 6 monitoring wells and the onsite
water supply well. No free product was reported in the monitoring wells. Slug tests were
conducted at monitoring wells MW-1, MW-2 and MW-5 with an average hydraulic conductivity
of 1x10-5 cm/sec.

In March 1993, groundwater level measurements indicated 2 feet of free product (noted as
kerosene or #2 diesel) in monitoring well MW-2, and 3 feet of free product (noted as gasoline)
in monitoring well MW-5. A Corrective Action Plan was submitted by Shewmaker
Environmental, Inc. (no date on report) that recommended pump and treat and soil vapor
extraction to remediate site groundwater and soils, respectively.

A January 24, 1994, Environmental Assessment Report prepared by Shewmaker
Environmental, Inc. noted that between 1990 and 1992 a total of 14 monitoring wells were

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installed (MW-1 through MW-14D). Monitoring wells, MW-11S, MW-11D, MW-12S, MW-12D,
MW-14S and MW-14D were installed on the adjacent property to the west. In 1993, monitoring
wells AMW-1 through AMW-7 were installed on the adjacent property to the west (AMW-6 and
AMW-7) and south (AMW-1 through AMW-5). Groundwater samples were collected from
monitoring wells AMW-1 through AMW-7 on December 3, 1993, and from MW-1 through
MW-14D and AMW-1 through AMW-7 on January 7, 1994. The samples appear to have only
been evaluated for benzene, toluene, ethylbenzene and xylenes (BTEX). Benzene was
detected in monitoring well AMW-1 slightly above the regulatory standard during the December
1993 sampling event. Groundwater contamination above regulatory standards were detected in
monitoring wells MW-1, MW-2, MW-3, MW-4, MW-5S, MW-5D, MW-6, MW-8, MW-9, MW-
11S, MW-11D, and MW-12D during the January 1994 sampling.

In April 1997, Applied Resource Management, PC submitted a Comprehensive Site Assessment
(CSA) for the property. The CSA indicated that there are no known water supply wells within
1,000 feet. The CSA report noted that there were 13 type II monitoring wells (MW-1 through
MW-12 and MW-17), and 4 Type III telescoping monitoring wells (MW-2D, MW-5D, MW-11D
and MW-12D). As part of the CSA, 8 additional monitoring wells (MW-13, MW-14, MW-15,
MW-16, MW-19, MW-20, MW-21 and MW-24) were installed on the property.

Well construction information is provided in Table 1. Information included in the CSA indicated
that there were 2 separate free product plumes, 1 in the northeastern property corner and the
other in the central portion of the property. The onsite monitoring wells (except wells with free
product) and 4 offsite monitoring wells (MW-34, AW-6, AW-7 and MW-33) located on the
adjacent property to the west (former Louis Dreyfus) related to an investigation on that property
was sampled in January of 1997. Eight of the monitoring wells indicated concentrations that
exceeded regulatory levels.

On May 27, 1998, Applied Resource Management, PC submitted a Corrective Action Plan
(CAP) for the property. The CAP recommended installation of a free product recovery trench
along the southern property boundary, the installation of a soil vapor extraction system and
natural attenuation of groundwater. The groundwater recovery trench was installed and natural
attenuation monitoring for groundwater was implemented. The construction details of the
groundwater recovery trench are not available. It does not appear that the soil vapor extraction
system was installed.

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Groundwater monitoring events were conducted by Applied Resource Management, PC on May
20, 1997; November 18, 1999; June 19, 2002; January 14, 2004; May 26, 2006; January 24,
2007; April 26, 2007; July 26, 2007; October 25, 2007; March 19, 2008; September 23,
2008; March 25-26, 2008; December 20-21, 2011; and June 6, 2012. Monitoring wells MW-1,
MW-3R, MW-5S, MW-5D, MW-12S, MW-12D, MW-15, MW-25, MW-26 and AMW-1 were noted
as having been destroyed. As part of the June 2012 sampling event, monitoring well MW-5SR
was installed to replace destroyed well MW-5S and monitoring well MW-5DR was installed to
replace well MW-5D.

In December 2012, May 2013, December 2013, May 2014, and December 2014 Environmental
Services, Inc. conducted groundwater monitoring events. Samples were collected from the
all of the existing onsite monitoring wells (MW-2D, MW-4, MW-5SR, MW-5DR, MW-6, MW-7,
MW-8, MW-9, MW-10, MW-13, MW-14, MW-16, MW-17, MW-19, MW-20, MW-21, MW-22,
MW-23, MW-24, MW-27 and MW-28) and offsite monitoring wells MW-11S, MW-11D and
MW-34. The laboratory results indicated concentrations of BTEX, methyl tert-butyl ether (MTBE),
naphthalene, di-isopropylether (DIPE) and isopropylbenzene above the 15A NCAC 02L .0202
Groundwater Quality Standards (2L standard). Benzene has been detected above the gross
contaminant level at monitoring wells MW-2S, MW-5SR and MW-21D.

In June 2014, ESI submitted an injection permit to NCDEQ for the facility. The injectant product
that was proposed was NutriSulfate. The injection permit was approved by NCDEQ on
September 10, 2014, but a new technology cleanup plan submitted by Environmental Services,
Inc., was not approved since the extent of the plumes had not been defined.

According to a previous report, in August and September 2014 Environmental Services, Inc.
mailed and emailed access letters to the adjacent property owners, except TransMontaigne.
After reviewing the sampling data from the TransMontaigne incident, it appeared that the plumes
may be too close together to distinguish between the respective releases. Motiva and the City
of Greensboro were contacted regarding access. Motiva stated that they would not allow
access to their property to install monitoring wells, but did direct their consultant to provide
the most recent sampling data. The sampling data provided by Motiva’s environmental
consultant for 3 monitoring wells located near their western property boundary did not indicate
that the GNC plume has migrated onto their property. The City of Greensboro denied access
to their property to install any wells, even along the property line with GNC.

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In December 2014, ESI supervised the installation of Monitoring Well MW-17D in the vicinity of
MW-17, to delineate the eastern side of the deep groundwater contaminant plume. MTBE was
detected at levels above the 2L standard during the December 2014 sampling event, and
benzene was detected at levels above the 2L Standard during the June 2015 sampling event.

In June 2015 and December 2015, Kleinfelder conducted a groundwater monitoring event.
Samples were collected from the all of the existing onsite monitoring wells (MW-2S,
MW-2D, MW-4, MW-5SR, MW-5DR, MW-6, MW-7, MW-8, MW-9, MW-10, MW-13, MW-14,
MW-16, MW-17, MW-17D, MW-19, MW-20, MW-21, MW-21D, MW-22, MW-23, MW-24,
MW-27 and MW-28) and offsite monitoring wells MW-11S, MW-11D and MW-34. Monitoring
well MW-23 was not sampled in June 2015, as it was covered and inaccessible during the event.
The laboratory results indicated concentrations of BTEX, MTBE, naphthalene, DIPE and
isopropylbenzene above the 2L standard. Benzene has been detected above the gross
contaminant level at monitoring wells MW-2S, MW-5SR and MW-21D.

In June 2016 and December 2016, Kleinfelder conducted a groundwater monitoring event.
Samples were collected from the all of the existing onsite monitoring wells (MW-2S,
MW-2D, MW-4, MW-5SR, MW-5DR, MW-6, MW-7, MW-8, MW-9, MW-10, MW-13, MW-14,
MW-16, MW-17, MW-17D, MW-19, MW-20, MW-21, MW-21D, MW-22, MW-23, MW-24,
MW-27 and MW-28) and offsite monitoring wells MW-11S, MW-11D and MW-34. Monitoring
well MW-9 was covered and inaccessible during the December 2016 event. The laboratory
results indicated concentrations of BTEX, MTBE, naphthalene, DIPE and isopropylbenzene
above the 2L standard. Benzene was detected above the gross contaminant level at monitoring
well MW-21D.

In June 2017, Kleinfelder conducted a groundwater monitoring event. Samples were collected
from the all of the existing onsite monitoring wells (MW-2S, MW-2D, MW-4, MW-5SR,
MW-5DR, MW-6, MW-7, MW-8, MW-9, MW-10, MW-13, MW-14, MW-16, MW-17, MW-17D,
MW-19, MW-20, MW-21, MW-21D, MW-22, MW-23, MW-24, MW-27 and MW-28) and offsite
monitoring wells MW-11S, MW-11D and MW-34. The laboratory results indicated concentrations
of BTEX, MTBE, naphthalene, DIPE and isopropylbenzene above the 2L standard. Benzene
was detected above the gross contaminant level at monitoring wells MW- 17 and MW-21.

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In the Semi-Annual Groundwater Monitoring Report submitted to the Guilford County
Department of Health, Kleinfelder recommended removing 14 monitoring wells from the semi-
annual sampling schedule, based on no, or isolated, impacts above the NC 2L Standard across
multiple sampling events. The Guilford County Department of Health approved the
recommendation in a letter dated October 2, 2017.

In December 2017 and May 2018, Kleinfelder conducted groundwater monitoring events.
Groundwater samples were collected from 12 onsite monitoring wells MW-2S, MW-4, MW-5SR,
MW-6, MW-17, MW-19, MW-20, MW-21, MW-27, MW2D, MW-5DR, MW-11D and MW-21D and
one (1) offsite monitoring well (MW-11D). Monitoring well MW-2S was dry during the event and
was unable to be sampled during the December 2017 event. The December 2017 monitoring
event was the first sampling event where only 13 monitoring wells were sampled as approved
by NCDEQ/Guilford County. The laboratory results indicated concentrations of BTEX, MTBE,
naphthalene, and DIPE above the 2L standard during both monitoring events. Benzene was
detected above the gross contaminant level at monitoring wells MW- 27 and MW-21D during
both monitoring event.

In November 2018, May 2019, and November 2019 Kleinfelder conducted groundwater
monitoring events. Groundwater samples were collected from 12 onsite monitoring wells, MW-
2S, MW-4, MW-5SR, MW-6, MW-17, MW-19, MW-20, MW-21, MW-27, MW-2D, MW-5DR,
and MW-21D, and one (1) offsite monitoring well, MW-11D. The laboratory results indicated
concentrations of benzene, ethylbenzene, xylenes, MTBE, naphthalene, and DIPE above the
2L standard during all three monitoring events. Benzene was detected above the gross
contaminant level at monitoring well MW-21D during all three events. Toluene concentrations
did not exceed the 2L standard of 600 µg/L in any of the monitoring wells during the November
2018 or November 2019 sampling events; however, they did exceed the 2L standard in
monitoring well MW-27 during the May 2019 sampling event.

Kleinfelder’s December 2019 report recommended that semi-annual monitoring should be
reduced to include only those monitoring wells that have exhibited benzene concentrations
that have exceeded the GCLs within the past 5 years because site closure with restrictions
only depends on reduction of benzene concentrations to below the GCL. The new
recommended semi-annual monitoring would have only included wells MW-2S, MW-17, MW-
21, MW-21D, and MW-27, and would have begun in June 2020. However, Kleinfelder

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received a letter from the Guilford County Department of Health and Human Services on May
11, 2020, identifying additional wells that needed to be added to the proposed new sampling
plan to continue monitoring offsite contamination migration. In addition to the wells that
Kleinfelder proposed, the Guilford County Department of Health and Human Services also
required the sampling of wells MW-34, MW-2D, MW-5SR, MW-5DR, and MW-11D.

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2 PURPOSE

This report details the results of the June 1 and 2, 2020 groundwater sampling event.
Groundwater samples were collected from eight (8) onsite monitoring wells, MW-2S, MW-2D,
MW-5SR, MW-5DR, MW-17, MW-21, MW-21D, and MW-27,and two (2) offsite monitoring
wells, MW-11D and MW-34.

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3 METHODS

3.1 MONITORING WELL SAMPLING
A groundwater monitoring event was conducted on June 1 and 2, 2020, which included sampling
8 onsite monitoring wells and 2 offsite monitoring wells. Upon arrival at the site, each of the
groundwater monitoring wells to be sampled was opened and allowed to equilibrate to
atmospheric conditions. Static water levels were obtained from the monitoring wells using a
decontaminated water level meter. The locations of the monitoring wells are shown on Figure 2a.
The monitoring wells were purged of approximately 3 well volumes of groundwater or until dry.
Groundwater samples were collected using either a peristaltic pump with disposable polyethylene
tubing or a submersible Grundfos pump with disposable polyethylene tubing. Field
measurements of pH, specific conductivity, dissolved oxygen, oxidation reduction potential and
temperature were measured, except where access limitations prevented some of the
measurements. A summary of field attenuation data from the June 2020 sampling event is
provided in Table 4 and a summary of historical natural attenuation data is provided in Table 5.
The samples were placed into laboratory-provided jars, labeled, and maintained on ice until
delivery to Waypoint Analytical Laboratory (Waypoint) in Charlotte, North Carolina. The samples
were analyzed for volatile organic compounds (VOCs) by EPA Method 6200B (602 list plus
naphthalene). A Chain-of-Custody document was utilized throughout the collection and
transportation process and is included with the laboratory report in Appendix A.

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4 RESULTS

4.1 GROUNDWATER FLOW DIRECTION
Potentiometric data collected from monitoring wells on June 1 and 2, 2020 were used to
generate contour plots for the shallow and deep zones. Data presented in Table 2 and Table 3
summarizes the historical groundwater elevations at each monitoring well. Groundwater flow in
the shallow zone is generally trending toward the southwest (Figure 3) with an average
horizontal gradient of 0.009 ft/ft. Groundwater flow in the deep zone is generally trending toward
the southwest (Figure 4) with an average horizontal gradient of 0.022 ft/ft. The vertical gradient
measured between paired shallow and deep monitoring wells, MW-5SR and MW-5DR was
calculated as 0.100 ft/ft downward. The vertical gradient measured between paired shallow and
deep monitoring wells, MW-2S and MW-2D was calculated as 0.004 ft/ft downward. The vertical
gradient measured between paired shallow and deep monitoring wells, MW-21 and MW-21D
was estimated as 0.003 ft/ft downward; however, the exact depth to the well screen and well
screen length of deep monitoring well MW-21D is not known and was presumed to be 55-ft and
5-ft, respectively, for the purpose of these calculations.

4.2 MONITORING WELL SAMPLING RESULTS
Analytical results for the latest groundwater samples, which were collected on June 1 and 2,
2020 are summarized on Table 6. Groundwater samples were collected from 8 onsite
monitoring wells, MW-2S, MW-5SR, MW-17, MW-21, MW-27, MW-2D, MW-5DR, and MW-21D,
and 2 offsite monitoring wells, MW-11D and MW-34. Concentration/Isoconcentration maps for
the latest detected benzene (shallow and deep), are included as Figure 5 and 6 respectively.
All of the water samples were analyzed per EPA Method 6200B (602 list plus naphthalene).

The following is a summary of the analytical results from the June 2020 sampling event:
• Benzene concentrations exceeded the 2L standard of 1 microgram per liter (µg/L) in
monitoring wells MW-2S (3100 µg/L), MW-5SR (820 µg/L), MW-17 (4100 µg/L), MW-
21 (3600 µg/L), MW-27 (2800 µg/L), MW-2D (280 µg/L), MW-11D (48 µg/L), and MW-
21D (4900 µg/L).
o No benzene concentrations exceeded the gross contaminant level (GCL) of
5000 µg/L in any of the monitoring wells sampled for this event.

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• Toluene concentrations did not exceed the 2L standard of 600 µg/L in any of the
monitoring wells sampled for this event.
• Ethylbenzene concentrations exceeded the 2L standard of 600 µg/L in monitoring
wells MW-2S (2400 µg/L), MW-17 (2300 µg/L), and MW-21 (2500 µg/L). There were
no ethylbenzene concentrations detected above the GCL of 84500 µg/L.
• Xylenes concentrations exceeded the 2L standard of 500 µg/L in monitoring wells MW-
2S (1900 µg/L), MW-17 (570 µg/L), and MW-21 (6200 µg/L). There were no Xylenes
concentrations detected above the GCL of 87500 µg/L.
• MTBE concentrations exceeded the 2L standard of 20 µg/L in monitoring well MW-2S
(52 µg/L), MW-5SR (180 µg/L), MW-17 (3500 µg/L), MW-27 (86 µg/L), MW-2D (310
µg/L), MW-5DR (1200 µg/L), and MW-11D (360 µg/L). There were no MTBE
concentrations detected above the GCL of 20000 µg/L.
• DIPE/Isopropyl Ether concentrations exceeded the 2L standard of 70 µg/L in
monitoring wells MW-17 (630 µg/L), MW-2D (160 µg/L), MW-5DR (170 µg/L), MW-
11D (81 µg/L), and MW-21D (140 µg/L). There were no DIPE/Isopropyl Ether
concentrations detected above the GCL of 70000 µg/L.
• Naphthalene concentrations exceeded the NC 2L groundwater standard of 6 µg/L in
monitoring wells MW-2S (180 µg/L), MW-5SR (370 µg/L), MW-17 (420 µg/L), MW-21
(230 µg/L), MW-27 (190 µg/L), MW-34 (9.1 µg/L), MW-2D (100 µg/L), MW-5DR (21
µg/L), MW-21D (85 µg/L). There were no naphthalene concentrations detected above
the GCL of 6000 µg/L.

A historical groundwater quality data table that includes sampling events beginning in 1987 to
the current sampling event is included as Table 7. Graphs 1 through 4 show water levels vs
benzene concentrations over time in monitoring wells MW-17, MW-21, MW-21D, and MW-27.

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5 CONCLUSIONS

Groundwater samples were collected from 8 onsite monitoring wells, MW-2S, MW-5SR, MW-
17, MW-21, MW-27, MW-2D, MW-5DR, and MW-21D, and 2 offsite monitoring wells, MW-11D
and MW-34, on June 1 and 2, 2020.

Based on current and historical groundwater elevation data, the shallow and deep groundwater
flow is generally to the southwest, but the northern portion of the shallow aquifer also flows to
the north toward Market Street.

No constituent concentrations in the shallow or deep groundwater zones exceeded their
applicable GCLs.

The site should be eligible for closure once all concentrations are below the GCLs for two
consecutive monitoring events. This will count as the first event.

20210520.001A | RAL20R113460 Page 14 of 15 June 30, 2020
© 2020 Kleinfelder www.kleinfelder.com
6 RECOMMENDATIONS

Because site closure with restrictions only depends on reduction of benzene concentrations to
below the GCL, the site should be eligible for closure once all concentrations are below the GCLs
for two consecutive monitoring events. Kleinfelder will continue to monitor 8 onsite monitoring
wells, MW-2S, MW-5SR, MW-17, MW-21, MW-27, MW-2D, MW-5DR, and MW-21D, and 2 offsite
monitoring wells, MW-11D and MW-34, semi-annually until two consecutive monitoring events
below the benzene GCL is achieved.

20210520.001A | RAL20R113460 Page 15 of 15 June 30, 2020
© 2020 Kleinfelder www.kleinfelder.com
7 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.

The information included on graphic representations in the Semi-Annual 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.

20210520.001A | RAL20R113460 June 30, 2020
© 2020 Kleinfelder www.kleinfelder.com
TABLES

Well No. MW-1 MW-2S MW-2D MW-3R MW-4 MW-5S MW-5D MW-5SR MW-5DR MW-6 MW-7
Date Installed 02/07/1990 02/07/1990 02/07/1990 06/05/2012 06/05/2012 02/07/1990 02/07/1990
TOC Elevation
(feet)936.39 936.36 932.74 932.55 932.54 931.08 928.50
Total Depth Drilled
(feet,bgs)*19 64 20.5 30 60 20.5 26.5
Diameter
(inches)2 2 2 2 2 2 2
Screen Interval
Depth
(feet,bgs)
5-19 54-64 5.5-20.5 10-30 55-60 5.5-20.5 NR
Well No. MW-8 MW-9 MW-10 MW-11S MW-11D MW-12S MW-12D MW-13 MW-14 MW-15 MW-16
Date Installed 02/07/1990 02/07/1990 02/07/1990 02/07/1990 02/07/1990 02/07/1990 02/07/1990 NR
TOC Elevation
(feet)935.24 935.98 937.60 920.46 920.58 929.70 928.98 929.28
Total Depth Drilled
(feet,bgs)*26.5 26.5 26.5 26.5 60.5 17 19.5 20
Diameter
(inches)2 2 2 2 2 2 2 2
Screen Interval
Depth
(feet,bgs)
16.5-26.5 NR 16.5-26.5 11.5-26.5 NR NR NR 5-20
Well No. MW-17 MW-17D MW-19 MW-20 MW-21 MW-21D MW-22 MW-23 MW-24 MW-25 MW-26
Date Installed NR 12/01/2014 NR NR NR NR NR NR NR
TOC Elevation
(feet)934.36 NM 938.66 936.04 935.28 935.37 937.51 935.96 941.05
Total Depth Drilled
(feet,bgs)*23.5 59 22.5 22.5 22.5 60 25 22.5 25
Diameter
(inches)2 2 2 2 2 2 2 2 2
Screen Interval
Depth
(feet,bgs)
NR 54-59 7.5-22.5 7.5-22.5 7.5-22.5 NR NR 7.5-22.5 10-25
Well No.MW-27 MW-28 MW-33 MW-34 AMW-1 AW-6 AW-7
Date Installed NR NR NR
TOC Elevation
(feet)935.21 939.87 933.81
Total Depth Drilled
(feet,bgs)*25 25 24
Diameter
(inches)2 2 2
Screen Interval
Depth
(feet,bgs)
NR NR NR
NOTES:
1) bgs = below ground surface.
2) TOC = Top of well casing.
4) NR = No record.DestroyedDestroyedDestroyedDestroyedDestroyedDestroyedDestroyedDestroyedDestroyed3) * = Depth based on field measurement for wells installed
prior to 2012.DestroyedDestroyedDestroyedDestroyedTABLE 1: WELL CONSTRUCTION DETAILS
20210520.001A PAGE 1 OF 1
TABLE 2: GROUNDWATER ELEVATIONS
Well No.MW-2S MW-2D MW-4 MW-5SR MW-5DR MW-6 MW-7 MW-8 MW-9 MW-10 MW-11S MW-11D MW-13 MW-14
Date Measured 06/01/20 06/01/20 NM 06/01/20 06/01/20 NM NM NM NM NM NM 06/02/20 NM NM
TOC Elevation
(feet)936.39 936.36 932.74 932.55 932.54 931.08 928.50 935.24 935.98 936.15 920.46 920.58 929.70 928.98
Screen Depth
Interval
(feet,bgs)
5-19 54-64 5.5-20.5 10-30 55-60 5.5-20.5 ?-26.5 16.5-26.5 ?-26.5 16.5-26.5 11.5-26.5 ?-60.5 ?-17 ?-19.5
Free Product
Thickness (inches) ND ND ND ND ND ND NM NM NM NM NM ND NM NM
Depth to
Groundwater
(feet, btoc)
11.19 11.35 NM 11.11 15.61 NM NM NM NM NM NM 9.90 NM NM
*Groundwater
Elevation
(feet)
925.20 925.01 NM 921.44 916.93 NM NM NM NM NM NM 910.68 NM NM
Well No.MW-16 MW-17 MW-17D MW-19 MW-20 MW-21 MW-21D MW-22 MW-23 MW-24 MW-27 MW-28 MW-34
Date Measured NM 06/02/20 NM NM NM 06/01/20 06/01/20 NM NM NM 06/02/20 NM 06/02/20
TOC Elevation
(feet)929.28 934.36 NM 938.66 936.04 935.28 935.37 937.51 935.96 941.05 935.21 939.87 933.81
Screen Depth
Interval
(feet,bgs)
5-20 ?-23.5 54-59 7.5-22.5 7.5-22.5 7.5-22.5 ?-60 ?-25 7.5-22.5 10-25 ?-25 ?-25 ?-24
Free Product
Thickness (inches) NM ND NM ND ND ND ND NM NM NM ND NM NM
Depth to
Groundwater
(feet, btoc)
NM 8.42 NM NM NM 9.08 9.33 NM NM NM 9.64 NM 9.25
*Groundwater
Elevation
(feet)
NM 925.94 NM NM NM 926.20 926.04 NM NM NM 925.57 NM 924.56
NOTES:
1) bgs = below ground surface
2) TOC = Top of well casing
3) btoc = below top of casing
4) ND = Not detected
5) Elevations referenced to an assumed datam of 1000.00 feet
6) *corrected groundwater elevation to account for free product = [uncorrected groundwater elevation + (free product thickness X density of free product/density of water)]
7) density of diesel is 0.84 g/mL
8) density of water is 1.0 g/mL
9) ? = Screen interval is unknown
10) NM = Not Measured
20210520.001A PAGE 1 OF 1
Well No. Date Measured
TOC
Elevation(feet)
Screen Depth
Interval(feet,bgs)
Free Product
Thickness (inches)
Depth to
Groundwater(feet, btoc)
†Groundwater
Elevation(feet)Well No. Date Measured
TOC
Elevation(feet)
Screen Depth
Interval(feet,bgs)
Free Product
Thickness (inches)
Depth to
Groundwater(feet, btoc)
†Groundwater
Elevation(feet)
02/15/96 0.04 10.25 925.86 02/15/96 ND 2.66 905.26
01/06/97 ND 14.15 921.93 01/06/97 ND 3.60 904.3203/11/97 NM NM NM 03/11/97 ND 2.81 905.11
05/20/97 ND 13.00 923.08 05/20/97 NM NM NM
06/18/02 NM NM NM 06/18/02 ND 10.70 897.2201/14/04 01/14/04 ND 5.29 902.63
05/24/06 05/24/06
04/25/07 01/06/97 ND 6.07 914.2502/15/96 ND 10.51 928.31 03/11/97 NM NM NM
01/06/97 0.02 15.93 922.91 05/20/97 NM NM NM
03/11/97 NM NM NM 06/18/02 ND 12.68 907.6405/20/97 0.01 13.68 925.15 01/14/04 ND 7.66 912.66
06/18/02 05/24/06
01/14/04 02/15/96 ND 2.63 904.4305/24/06 01/06/97 ND 3.68 903.38
04/25/07 03/11/97 NM NM NM02/15/96 1.57 6.42 921.45 05/20/97 ND 4.38 902.68
01/06/97 0.48 8.11 918.92 06/18/02 ND 10.73 896.33
03/11/97 NM NM NM 01/14/04 ND 5.99 901.0705/20/97 0.43 13.68 919.42 05/24/06
06/18/02 0.76 18.32 908.93 01/06/97 ND 12.97 907.39
01/14/04 ND 10.42 916.24 03/11/97 NM NM NM05/24/06 ND 9.91 916.75 05/20/97 NM NM NM
04/25/07 06/18/02 ND 18.87 901.49
02/15/96 ND 7.57 919.00 01/14/04 ND 13.03 907.3301/06/97 ND 11.20 915.37 05/24/06
03/11/97 NM NM NM 01/06/97 ND 10.57 913.1105/20/97 ND 9.94 916.63 03/11/97 NM NM NM
06/18/02 ND 18.20 908.37 05/20/97 NM NM NM
01/14/04 ND 12.43 914.14 06/18/0205/24/06 ND 15.18 911.39 01/14/04 ND 11.50 912.18
04/25/07 05/24/06
TABLE 3: HISTORICAL GROUNDWATER ELEVATION DATA
DRY
DESTROYED
MW-1 936.08 12-27
MW-12S 907.92 ?-20.0
920.32 ?-17.2MW-3 938.82 5.5-20.5
MW-3R 938.82 ?-20.5 INACCESSIBLEDESTROYED
MW-15
DESTROYED
MW-25
INACCESSIBLE DESTROYED
INACCESSIBLE
MW-12D
DESTROYED
INACCESSIBLEINACCESSIBLE DESTROYED
907.06 ?-41.0
MW-5S 926.66 2.5-17.5
MW-26 923.68 ?-14.8
920.36 ?-19.5DESTROYED
MW-5D 926.57 ?-56.5
DESTROYED DESTROYED
20210520.001A PAGE 1 OF 11
Well No. Date Measured
TOC Elevation(feet)
Screen Depth Interval(feet,bgs)
Free Product Thickness (inches)
Depth to Groundwater(feet, btoc)
†Groundwater
Elevation(feet)Well No. Date Measured
TOC Elevation(feet)
Screen Depth Interval(feet,bgs)
Free Product Thickness (inches)
Depth to Groundwater(feet, btoc)
†Groundwater
Elevation(feet)Well No. Date Measured TOC Elevation(feet)
Screen Depth Interval(feet,bgs)
Free Product Thickness (inches)
Depth to Groundwater(feet, btoc)
†Groundwater
Elevation(feet)
02/15/96 ND 11.40 924.99 02/15/96 ND 11.91 924.45 02/15/96 ND 12.25 920.49
01/06/97 ND 14.60 921.79 01/06/97 ND 14.88 921.48 01/06/97 ND 16.63 916.1103/11/97 NM NM NM 03/11/97 NM NM NM 03/11/97 NM NM NM
05/20/97 NM NM NM 05/20/97 ND 12.42 923.94 05/20/97 NM NM NM
06/18/02 06/18/02 ND 21.68 914.68 06/18/0201/14/04 ND 14.13 922.26 01/14/04 ND 14.71 921.65 01/14/04 ND 17.00 915.74
05/24/06 ND 18.43 917.96 05/24/06 ND 18.88 917.48 05/24/06 ND 19.89 912.85
04/25/07 ND 13.19 923.20 04/25/07 ND 13.33 923.03 04/25/07 ND 15.20 917.5407/26/07 ND 17.55 918.84 07/26/07 ND 18.24 918.12 07/26/07 ND 18.60 914.14
10/23/07 10/23/07 ND 21.42 914.94 10/23/07 ND 21.46 911.2803/19/08 ND 16.62 919.77 03/19/08 ND 16.91 919.45 03/19/08 ND 17.64 915.10
09/23/08 ND 15.75 920.64 09/23/08 ND 15.86 920.50 09/23/08 ND 17.38 915.36
03/25/09 ND 14.05 922.34 03/25/09 ND 14.45 921.91 03/25/09 ND 15.67 917.0712/20-21/11 ND 14.23 922.16 12/20-21/11 ND 14.59 921.77 12/20-21/11 ND 15.67 917.07
06/05-06/12 ND 15.81 920.58 06/05-06/12 ND 13.25 923.11 06/05-06/12 ND 16.68 916.06
12/17/12 12/17/12 ND 19.08 917.28 12/19/12 ND 19.35 913.3905/15/13 ND 14.11 922.28 05/13/13 ND 14.20 922.16 05/16/13 ND 15.54 917.20
12/10/13 ND 15.88 920.51 12/10/13 ND 16.05 920.31 12/10/13 ND 16.90 915.84
05/12/14 ND 13.09 923.30 05/12/14 ND 13.20 923.16 05/15/14 ND 14.64 918.1012/15/14 ND 17.19 919.20 12/15/14 ND 17.61 918.75 12/14/14 ND 17.97 914.77
06/10/15 ND 16.16 920.23 06/09/15 ND 16.50 919.86 06/10/15 ND 17.08 915.66
12/07/15 ND 12.87 923.52 12/07/15 ND 13.40 922.96 12/09/15 ND 14.83 917.9106/28/16 ND 14.01 922.38 06/28/16 ND 13.05 923.31 06/29/16 ND 15.51 917.23
12/13/16 ND 18.05 918.34 12/13/16 ND 18.69 917.67 12/12/16 ND 19.31 913.43
06/07/17 ND 13.53 922.86 06/07/17 ND 13.71 922.65 06/07/17 ND 14.94 917.80
12/12/17 12/12/17 ND 19.70 916.66 12/12/17 ND 19.77 912.9705/15/18 ND 14.50 921.89 05/15/18 ND 14.80 921.56 05/15/18 ND 15.90 916.84
11/27/18 ND 11.82 924.57 11/27/18 ND 12.34 924.02 11/28/18 ND 13.79 918.95
05/21/19 ND 13.12 923.27 05/21/19 ND 14.52 921.84 05/21/19 ND 10.25 922.4911/25/19 ND 15.24 921.15 11/25/19 ND 15.38 920.98 11/26/19 ND 16.45 916.29
06/01/20 ND 11.19 925.20 06/01/20 ND 11.35 925.01 06/01/20 NM NM NM
MW-4 932.74 5.5-20.5
DRY
DRY
DRY
DRYMW-2S 936.39 54-64
TABLE 3: HISTORICAL GROUNDWATER ELEVATION DATA, cont.
5-19
DRY
MW-2D 936.36
20210520.001A PAGE 2 OF 11
Well No. Date Measured
TOC Elevation(feet)
Screen Depth Interval(feet,bgs)
Free Product Thickness (inches)
Depth to Groundwater(feet, btoc)
†Groundwater
Elevation(feet)Well No. Date Measured
TOC Elevation(feet)
Screen Depth Interval(feet,bgs)
Free Product Thickness (inches)
Depth to Groundwater(feet, btoc)
†Groundwater
Elevation(feet)Well No. Date Measured TOC Elevation(feet)
Screen Depth Interval(feet,bgs)
Free Product Thickness (inches)
Depth to Groundwater(feet, btoc)
†Groundwater
Elevation(feet)
06/05-06/12 ND 16.90 915.65 02/15/96 ND 5.92 925.16 02/15/96 ND 7.78 920.72
12/17/12 ND 20.22 912.33 01/06/97 ND 9.00 922.08 01/06/97 ND 10.24 918.2605/13/13 ND 14.78 917.77 03/11/97 NM NM NM 03/11/97 NM NM NM
12/10/13 ND 16.49 916.06 05/20/97 NM NM NM 05/20/97 NM NM NM
05/12/14 ND 15.33 917.22 06/18/02 ND 16.56 914.52 06/18/02 ND 17.48 911.0212/14/14 ND 18.73 913.82 01/14/04 ND 10.78 920.30 01/14/04 ND 11.44 917.06
06/09/15 ND 18.31 914.24 05/24/06 ND 14.35 916.73 05/24/06 ND 15.73 912.77
12/07/15 ND 14.00 918.55 04/25/07 ND 10.82 920.26 04/25/07 ND 12.56 915.9406/27/16 ND 16.75 915.8 07/26/07 ND 13.72 917.36 07/26/07 ND 15.94 912.5612/12/16 ND 20.62 911.93 10/23/07 ND 16.51 914.57 10/23/07 ND 18.41 910.0906/07/17 ND 14.56 917.99 03/19/08 ND 13.20 917.88 03/19/08 ND 14.61 913.89
12/12/17 ND 21.36 911.19 09/23/08 ND 12.35 918.73 09/23/08 ND 14.56 913.945/15/2018 ND 15.41 917.14 03/25/09 ND 11.03 920.05 03/25/09 ND 13.72 914.7811/27/2018 ND 11.53 921.02 12/20-21/11 ND 9.97 921.11 12/20-21/11 ND 11.71 916.79
5/21/2019 ND 13.45 919.10 06/05-06/12 ND 11.14 919.94 06/05-06/12 ND 13.18 915.3211/25/2019 ND 14.15 918.40 12/19/12 ND 13.92 917.16 12/19/12 ND 15.55 912.956/1/2020 ND 11.11 921.44 05/16/13 ND 9.68 921.40 05/16/13 ND 11.36 917.14
06/05-06/12 ND 19.86 912.68 12/11/13 ND 11.61 919.47 12/11/13 ND 12.55 915.95
12/17/12 ND 21.63 910.91 05/15/14 ND 8.80 922.28 05/13/14 ND 10.94 917.5605/13/13 ND 17.93 914.61 12/14/14 ND 13.52 917.56 12/14/14 ND 15.02 913.48
12/10/13 ND 19.48 913.06 06/09/15 ND 12.92 918.16 06/09/15 ND 13.69 914.81
05/12/14 ND 17.49 915.05 12/9/15 ND 10.60 920.48 12/07/15 ND 11.14 917.36
12/14/14 ND 21.12 911.42 6/28/16 ND 9.93 921.15 6/27/16 ND 12.12 916.38
06/09/15 ND 21.05 911.49 12/12/16 ND 14.20 916.88 12/12/16 ND 18.26 910.24
12/07/15 ND 17.27 915.27 06/07/17 ND 9.80 921.28 06/07/17 ND 11.96 916.54
06/27/16 ND 19.2 913.34 12/12/17 ND 15.10 915.98 12/12/17 NM NM NM12/12/16 ND 23.73 908.81 05/15/18 ND 10.40 920.68 05/15/18 NM NM NM
06/07/17 ND 17.85 914.69 11/28/18 ND 7.00 924.08 11/27/2018 NM NM NM
12/12/17 ND 22.96 909.58 5/21/2019 ND 8.42 922.66 5/21/2019 NM NM NM05/15/18 ND 19.94 912.60 11/26/2019 ND 10.80 920.28 11/25/2019 NM NM NM
11/27/18 ND 16.36 916.18 6/1/2020 NM NM NM 6/1/2020 NM NM NM
5/21/2019 ND 17.6 914.9411/25/2019 ND 18.98 913.56
6/1/2020 ND 15.61 916.93
MW-5DR 932.54 55-60
932.55 10-30
MW-6 928.50 ?-26.5MW-75.5-20.5931.08
TABLE 3: HISTORICAL GROUNDWATER ELEVATION DATA, cont.
MW-5SR
20210520.001A PAGE 3 OF 11
TABLE 3: HISTORICAL GROUNDWATER ELEVATION DATA, cont.
Well No. Date Measured
TOC Elevation(feet)
Screen Depth Interval(feet,bgs)
Free Product Thickness (inches)
Depth to Groundwater(feet, btoc)
†Groundwater
Elevation(feet)Well No. Date Measured
TOC Elevation(feet)
Screen Depth Interval(feet,bgs)
Free Product Thickness (inches)
Depth to Groundwater(feet, btoc)
†Groundwater
Elevation(feet)
02/15/96 ND 10.73 924.51 02/15/96 ND 11.53 925.79
01/06/97 NM NM NM 01/06/97 ND 15.04 922.2803/11/97 NM NM NM 03/11/97 NM NM NM
05/20/97 NM NM NM 05/20/97 NM NM NM
06/18/02 ND 21.01 914.23 06/18/02 ND 21.28 916.0401/14/04 ND 13.97 921.27 01/14/04 ND 15.58 921.74
05/24/06 ND 18.14 917.10 05/24/06
04/25/07 ND 12.61 922.63 04/25/07 ND 15.15 922.1707/26/07 ND 17.40 917.84 07/26/07 ND 17.54 919.78
10/23/07 ND 20.48 914.76 10/23/07 ND 20.27 917.0503/19/08 ND 15.52 919.72 03/19/08 ND 18.09 919.23
09/23/08 ND 14.90 920.34 09/23/08 ND 16.95 920.37
03/25/09 ND 13.53 921.71 03/25/09 ND 15.41 921.9112/20-21/11 ND 11.42 923.82 12/20-21/11 ND 13.26 922.72
06/05-06/12 ND 13.97 921.27 06/05-06/12 ND 14.33 921.65
12/19/12 ND 16.54 918.70 12/19/12 ND 16.78 919.2005/15/13 ND 11.71 923.53 05/14/13 ND 13.26 922.72
12/10/13 ND 12.93 922.31 12/09/13 ND 14.50 921.48
05/13/14 ND 9.50 925.74 05/14/14 ND 11.68 924.3012/14/14 ND 18.30 916.94 12/14/14 ND 16.28 919.70
06/09/15 ND 13.85 921.39 06/09/15 ND 14.79 921.1912/7/15 ND 10.62 924.62 12/8/15 ND 12.34 923.64
6/28/16 ND 11.83 923.41 6/28/16 ND 11.89 924.0912/12/16 ND 17.35 917.89 12/12/16 ND NM NM
06/07/17 ND 11.81 923.43 06/07/17 ND 15.60 920.38
12/12/17 NM NM NM 12/12/17 NM NM NM05/15/18 NM NM NM 05/15/18 NM NM NM
11/27/18 NM NM NM 11/27/18 NM NM NM
05/21/19 NM NM NM 05/21/19 NM NM NM11/25/19 NM NM NM 11/25/19 NM NM NM
06/01/20 NM NM NM 06/01/20 NM NM NM
MW-8 935.24 16.5-26.5 MW-9
935.98*
?-26.5
937.32 INACCESSIBLE
20210520.001A PAGE 4 OF 11
TABLE 3: HISTORICAL GROUNDWATER ELEVATION DATA, cont.
Well No. Date Measured
TOC Elevation(feet)
Screen Depth Interval(feet,bgs)
Free Product Thickness (inches)
Depth to Groundwater(feet, btoc)
†Groundwater
Elevation(feet)Well No. Date Measured
TOC Elevation(feet)
Screen Depth Interval(feet,bgs)
Free Product Thickness (inches)
Depth to Groundwater(feet, btoc)
†Groundwater
Elevation(feet)
02/15/96 ND 11.70 925.90 02/15/96 ND 7.84 912.62
01/06/97 ND 14.53 923.07 01/06/97 ND 11.97 908.4903/11/97 NM NM NM 03/11/97 ND 8.72 911.74
05/20/97 NM NM NM 05/20/97 NM NM NM
06/18/02 ND 21.10 916.50 06/18/02 ND 15.74 904.7201/14/04 ND 14.85 922.75 01/14/04 ND 11.13 909.33
05/24/06 05/24/06 ND 11.98 908.48
04/25/07 ND 14.50 923.10 04/25/07 ND 9.28 911.1807/26/07 ND 17.83 919.77 07/26/07 ND 13.74 906.72
10/23/07 ND 20.59 917.01 10/23/07 ND 16.37 904.0903/19/08 ND 17.28 920.32 03/19/08 ND 10.04 910.42
09/23/08 ND 16.26 921.34 09/23/08 ND 11.30 909.16
03/25/09 ND 14.90 922.70 03/25/09 ND 9.01 911.4512/20-21/11 ND 14.39 923.21 12/20-21/11 ND 9.49 910.97
06/05-06/12 ND 15.82 920.33 06/05-06/12 ND 11.27 909.19
12/19/12 ND 18.35 917.80 12/18/12 ND 13.11 907.3505/14/13 ND 13.94 922.21 05/13/13 ND 9.34 911.12
12/09/13 ND 16.02 920.13 12/10/13 ND 10.80 909.66
05/14/14 ND 13.47 922.68 05/12/14 ND 10.06 910.4012/14/14 ND 17.80 918.35 12/15/14 ND 12.17 908.29
06/10/15 ND 16.45 919.70 06/09/15 ND 12.29 908.1712/8/15 ND 13.36 922.79 12/7/15 ND 13.40 907.06
6/28/16 ND 14.78 921.37 6/29/16 ND 13.20 907.2612/13/16 ND 18.45 917.70 12/13/16 ND 13.06 907.40
06/08/17 ND 15.21 920.94 06/08/17 ND 10.59 909.87
12/12/17 NM NM NM 12/12/17 NM NM NM05/15/18 NM NM NM 05/15/18 NM NM NM
11/27/18 NM NM NM 11/27/18 NM NM NM
05/21/19 NM NM NM 05/21/19 NM NM NM
11/25/19 NM NM NM 11/25/19 NM NM NM
06/01/20 NM NM NM 06/01/20 NM NM NM
MW-10
936.15*
16.5-26.5 MW-11S 920.46 11.5-26.5
INACCESSIBLE937.60
20210520.001A PAGE 5 OF 11
TABLE 3: HISTORICAL GROUNDWATER ELEVATION DATA, cont.
Well No. Date Measured
TOC Elevation(feet)
Screen Depth Interval(feet,bgs)
Free Product Thickness (inches)
Depth to Groundwater(feet, btoc)
†Groundwater
Elevation(feet)Well No. Date Measured
TOC Elevation(feet)
Screen Depth Interval(feet,bgs)
Free Product Thickness (inches)
Depth to Groundwater(feet, btoc)
†Groundwater
Elevation(feet)Well No. Date Measured TOC Elevation(feet)
Screen Depth Interval(feet,bgs)
Free Product Thickness (inches)
Depth to Groundwater(feet, btoc)
†Groundwater
Elevation(feet)
02/15/96 ND 9.25 911.33 01/06/97 0.39 11.53 918.47 01/06/97 ND 13.75 915.23
01/06/97 ND 11.33 909.25 03/11/97 NM NM NM 03/11/97 NM NM NM03/11/97 NM NM NM 05/20/97 0.12 9.66 920.13 05/20/97 ND 11.85 917.13
05/20/97 ND 10.96 909.62 06/18/02 0.03 16.63 913.09 06/18/02
06/18/02 ND 16.85 903.73 01/14/04 ND 12.42 917.28 01/14/04 ND 15.92 913.0601/14/04 ND 12.15 908.43 05/24/06 ND 15.54 914.16 05/24/06 ND 18.36 910.62
05/24/06 ND 14.12 906.46 04/25/07 ND 11.47 918.23 04/25/07 ND 11.07 917.91
04/25/07 ND 10.39 910.19 07/26/07 ND 14.76 914.94 07/26/07 ND 13.39 915.5907/26/07 ND 14.81 905.77 10/23/07 10/23/07 ND 17.19 911.79
10/23/07 ND 17.40 903.18 03/19/08 ND 13.40 916.30 03/19/08 ND 12.72 916.2603/19/08 ND 11.06 909.52 09/23/08 ND 12.59 917.11 09/23/08 ND 11.45 917.53
09/23/08 ND 12.30 908.28 03/25/09 ND 11.06 918.64 03/25/09 ND 10.50 918.48
03/25/09 ND 10.02 910.56 12/20-21/11 ND 10.86 918.84 12/20-21/11 ND 10.58 918.4012/20-21/11 ND 10.37 910.21 06/05-06/12 ND 12.00 917.70 06/05-06/12 ND 12.11 916.87
06/05-06/12 ND 12.17 908.41 12/19/12 ND 14.34 915.36 12/19/12 ND 15.75 913.23
12/18/12 ND 13.94 906.64 05/15/13 ND 10.37 919.33 05/16/13 ND 11.15 917.8305/13/13 ND 10.22 910.36 12/10/13 ND 12.36 917.34 12/10/13 ND 11.82 917.16
12/10/13 ND 11.65 908.93 05/15/14 ND 10.02 919.68 05/15/14 ND 11.40 917.58
05/12/14 ND 10.89 909.69 12/14/14 ND 14.11 915.59 12/14/14 ND 13.21 915.7712/15/14 ND 12.98 907.60 06/09/15 ND 13.10 916.60 06/09/15 ND 14.32 914.66
06/09/15 ND 13.10 907.48 12/8/15 ND 9.90 919.80 12/7/15 ND 10.4 918.5812/07/15 ND 9.85 910.73 6/27/16 ND 11.28 918.42 6/27/16 ND 12.62 916.36
6/29/16 ND 12.44 908.14 12/13/16 ND 15.40 914.30 12/12/16 ND 15.40 913.5812/13/16 ND 14.62 905.96 06/08/17 ND 9.33 920.37 06/08/17 ND 11.77 917.21
06/08/17 ND 11.02 909.56 12/12/17 NM NM NM 12/12/17 NM NM NM
12/12/17 ND 14.99 905.59 05/15/18 NM NM NM 05/15/18 NM NM NM05/15/18 ND 11.85 908.73 11/27/18 NM NM NM 11/27/18 NM NM NM
11/27/18 ND 9.56 911.02 5/21/2019 NM NM NM 5/21/2019 NM NM NM
05/23/19 ND 11.5 909.08 11/25/2019 NM NM NM 11/25/2019 NM NM NM11/25/19 ND 11.63 908.95 6/1/2020 NM NM NM 6/1/2020 NM NM NM
06/02/20 ND 9.90 910.68
MW-11D 920.58 ?-60.5
MW-13 929.70 ?-17 MW-14 928.98 ?-19.5 DRYDRY20210520.001A PAGE 6 OF 11
TABLE 3: HISTORICAL GROUNDWATER ELEVATION DATA, cont.
Well No. Date Measured
TOC Elevation(feet)
Screen Depth Interval(feet,bgs)
Free Product Thickness (inches)
Depth to Groundwater(feet, btoc)
†Groundwater
Elevation(feet)Well No. Date Measured
TOC Elevation(feet)
Screen Depth Interval(feet,bgs)
Free Product Thickness (inches)
Depth to Groundwater(feet, btoc)
†Groundwater
Elevation(feet)Well No. Date Measured TOC Elevation(feet)
Screen Depth Interval(feet,bgs)
Free Product Thickness (inches)
Depth to Groundwater(feet, btoc)
†Groundwater
Elevation(feet)
01/06/97 ND 12.86 916.42 01/06/97 ND 11.67 922.69 12/15/14 NM ND 16.59 NM
03/11/97 NM NM NM 03/11/97 NM NM NM 06/09/15 NM ND 15.82 NM
05/20/97 ND 11.83 917.45 05/20/97 NM NM NM 12/7/15 NM ND 12.18 NM
06/18/02 06/18/02 0.87 19.67 915.36 06/28/16 NM ND 13.02 NM
01/14/04 ND 14.48 914.80 01/14/04 ND 13.08 921.28 12/12/16 NM ND 17.31 NM
05/24/06 ND 18.46 910.82 05/24/06 ND 16.73 917.63 06/07/17 NM ND 12.87 NM
04/25/07 ND 15.37 913.91 04/25/07 ND 12.96 921.40 12/12/17 NM NM NM NM
07/26/07 ND 18.80 910.48 07/26/07 ND 15.98 918.38 05/15/18 NM NM NM NM
10/23/07 10/23/07 ND 18.93 915.43 11/27/18 NM NM NM NM
03/19/08 ND 16.93 912.35 03/19/08 ND 15.83 918.53 5/21/2019 NM NM NM NM09/23/08 ND 16.68 912.60 09/23/08 ND 16.95 917.41 11/25/2019 NM NM NM NM
03/15/09 ND 15.05 914.23 03/25/09 ND 13.67 920.69 6/1/2020 NM NM NM NM
12/20-21/11 ND 13.52 915.76 12/20-21/11 ND 12.25 922.1106/05-06/12 ND 15.78 913.50 06/05-06/12 ND 13.65 920.71
12/19/12 ND 19.35 909.93 12/18/12 ND 16.14 918.22
05/16/13 ND 13.82 915.46 05/15/13 ND 12.18 922.1812/10/13 ND 13.37 915.91 12/09/13 ND 14.10 920.26
05/15/14 ND 13.57 915.71 05/14/14 ND 11.27 923.09
12/14/14 ND 17.54 911.74 12/14/14 ND 16.10 918.2606/09/15 ND 13.61 915.67 06/09/15 ND 14.36 920.00
12/7/15 ND 12.48 916.80 12/08/15 ND 11.80 922.566/29/16 ND 16.1 913.18 6/28/16 ND 12.25 922.11
12/12/16 ND 18.90 910.38 12/12/16 ND 16.80 917.5606/07/17 ND 14.00 915.28 06/07/17 ND 12.39 921.97
12/12/17 NM NM NM 12/12/17 ND 17.52 916.84
05/15/18 NM NM NM 05/15/18 ND 12.95 921.4111/27/18 NM NM NM 11/28/18 ND 10.18 924.18
05/21/19 NM NM NM 05/22/19 ND 11.00 923.36
11/25/19 NM NM NM 11/26/19 ND 13.21 921.1506/01/20 NM NM NM 06/02/20 ND 8.42 925.94
MW-17D 54-59
MW-16 929.28 5-20 MW-17 934.36 ?-23.5
DRY
DRY20210520.001A PAGE 7 OF 11
TABLE 3: HISTORICAL GROUNDWATER ELEVATION DATA, cont.
Well No. Date Measured
TOC Elevation(feet)
Screen Depth Interval(feet,bgs)
Free Product Thickness (inches)
Depth to Groundwater(feet, btoc)
†Groundwater
Elevation(feet)Well No. Date Measured
TOC Elevation(feet)
Screen Depth Interval(feet,bgs)
Free Product Thickness (inches)
Depth to Groundwater(feet, btoc)
†Groundwater
Elevation(feet)
01/06/97 ND 17.18 921.48 1/6/1997 0.01 13.30 922.75
03/11/97 NM NM NM 03/11/97 NM NM NM05/20/97 ND 14.93 923.73 05/20/97 ND 11.25 924.79
06/18/02 ND 16.01 922.65 06/18/02 1.77 21.22 916.18
01/14/04 ND 13.73 924.93 01/1/4/04 ND 14.30 921.7405/24/06 ND 18.26 920.40 05/24/06 ND 18.05 917.99
04/25/07 ND 12.65 926.01 04/25/07 ND 13.60 922.44
07/26/07 ND 15.15 923.51 07/26/07 ND 15.89 920.1510/23/07 ND 18.01 920.65 10/23/07 ND 18.96 917.08
03/19/08 ND 16.08 922.58 03/19/08 ND 16.70 919.3409/23/08 ND 14.92 923.74 09/23/08 ND 15.61 920.43
03/25/09 ND 13.18 925.48 03/25/09 ND 14.04 922.00
12/20-21/11 ND 12.81 925.85 12/20-21/11 ND 13.57 922.4706/05-06/12 ND 13.38 925.28 06/05-06/12 ND 14.23 921.81
12/19/12 ND 15.97 922.69 12/19/12 ND 17.68 918.36
05/14/13 ND 12.50 926.16 05/14/13 ND 13.24 922.8012/09/13 ND 13.94 924.72 12/09/13 ND 14.91 921.13
05/13/14 ND 10.87 927.79 05/13/14 ND 11.69 924.35
12/14/14 ND 15.19 923.47 12/14/14 ND 16.12 919.9206/10/15 ND 13.74 924.92 06/09/15 ND 14.59 921.45
12/8/15 ND 11.40 927.26 12/8/15 ND 12.35 923.696/28/16 ND 11.4 927.26 6/28/16 ND 12.27 923.77
12/12/16 ND 16.10 922.56 12/12/16 ND 18.70 917.3406/08/17 ND 12.51 926.15 06/08/17 ND 13.11 922.36
12/12/17 ND 17.60 921.06 12/12/17 ND 17.60 918.44
05/15/18 ND 13.10 925.56 05/15/18 ND 13.69 922.3511/28/18 ND 9.82 928.84 11/28/18 ND 10.45 925.59
05/22/19 ND 10.50 928.16 05/22/19 ND 10.95 925.09
11/26/19 ND 12.92 925.74 11/26/19 ND 13.36 922.6806/01/20 NM NM NM 06/01/20 NM NM NM
MW-19 938.66 7.5-22.5 MW-20 936.04 7.5-22.5
20210520.001A PAGE 8 OF 11
TABLE 3: HISTORICAL GROUNDWATER ELEVATION DATA, cont.
Well No. Date Measured
TOC Elevation(feet)
Screen Depth Interval(feet,bgs)
Free Product Thickness (inches)
Depth to Groundwater(feet, btoc)
†Groundwater
Elevation(feet)Well No. Date Measured
TOC Elevation(feet)
Screen Depth Interval(feet,bgs)
Free Product Thickness (inches)
Depth to Groundwater(feet, btoc)
†Groundwater
Elevation(feet)
01/06/97 ND 14.00 921.28 03/25/09 ND 14.30 921.07
03/11/97 NM NM NM 12/20-21/11 ND 14.99 920.3805/20/97 ND 11.92 923.36 06/05-06/12 ND 13.94 921.43
06/18/02 2.64 21.26 916.05 12/17/12 ND 15.42 919.95
01/14/04 ND 13.65 921.63 05/13/13 ND 12.87 922.5005/24/06 ND 17.46 917.82 12/10/13 ND 15.38 919.99
04/25/07 ND 12.95 922.33 05/12/14 ND 11.32 924.05
07/26/07 ND 15.11 920.17 12/14/14 ND 15.75 919.6210/23/07 ND 18.31 916.97 06/10/15 ND 14.34 921.03
03/19/08 ND 16.01 919.27 12/08/15 ND 12.37 923.0009/23/08 ND 14.78 920.50 6/28/16 ND 12.13 923.24
03/25/09 ND 13.32 921.96 12/13/16 ND 16.58 918.79
12/20-21/11 ND 12.84 922.44 06/08/17 ND 12.89 922.4806/05-06/12 ND 13.11 922.17 12/12/17 ND 17.25 918.12
12/17/12 ND 15.95 919.33 05/15/18 ND 13.26 922.11
05/14/13 ND 12.57 922.71 11/27/18 ND 10.73 924.6412/09/13 ND 14.25 921.03 05/21/19 ND 10.60 924.77
05/13/14 ND 11.01 924.27 11/25/19 ND 13.00 922.37
12/14/14 ND 15.44 919.84 06/01/20 ND 9.33 926.0406/10/15 ND 14.01 921.27
12/8/15 ND 11.85 923.436/28/16 ND 11.70 923.58
12/13/16 ND 16.25 919.0306/08/17 ND 12.48 922.80
12/12/17 ND 16.80 918.48
05/15/18 ND 12.93 922.3511/27/18 ND 9.65 925.63
05/21/19 ND 10.10 925.18
11/25/19 ND 12.68 922.6006/01/20 ND 9.08 926.20
MW-21 935.28 7.5-22.5
MW-21D 935.37 ?-60
20210520.001A PAGE 9 OF 11
TABLE 3: HISTORICAL GROUNDWATER ELEVATION DATA, cont.
Well No. Date Measured
TOC Elevation(feet)
Screen Depth Interval(feet,bgs)
Free Product Thickness (inches)
Depth to Groundwater(feet, btoc)
†Groundwater
Elevation(feet)Well No. Date Measured
TOC Elevation(feet)
Screen Depth Interval(feet,bgs)
Free Product Thickness (inches)
Depth to Groundwater(feet, btoc)
†Groundwater
Elevation(feet)Well No. Date Measured TOC Elevation(feet)
Screen Depth Interval(feet,bgs)
Free Product Thickness (inches)
Depth to Groundwater(feet, btoc)
†Groundwater
Elevation(feet)
01/06/97 ND 17.53 919.98 01/06/97 ND 16.69 921.34 01/06/97 ND 19.33 921.72
03/11/97 NM NM NM 03/11/97 NM NM NM 03/11/97 NM NM NM05/20/97 NM NM NM 05/20/97 NM NM NM 05/20/97 NM NM NM
06/18/02 06/18/02 ND 22.54 915.49 06/18/02
01/14/04 ND 17.35 920.16 01/14/04 ND 16.21 921.82 01/14/04 ND 19.00 922.0505/24/06 ND 20.98 916.53 05/24/06 ND 20.20 917.83 05/24/06 ND 22.73 918.32
04/25/07 ND 15.62 921.89 04/25/07 ND 14.79 923.24 04/25/07 ND 17.77 923.28
07/26/07 ND 20.79 916.72 07/26/07 ND 17.95 920.08 07/26/07 ND 20.36 920.6910/23/07 ND 23.43 914.08 10/23/07 ND 21.39 916.64 10/23/07 ND 23.25 917.80
03/19/08 ND 18.81 918.70 03/19/08 ND 17.86 920.17 03/19/08 ND 21.09 919.9609/23/08 ND 17.96 919.55 09/23/08 ND 16.82 921.21 09/23/08 ND 20.00 921.05
03/25/09 ND 16.42 921.09 03/25/09 ND 15.31 922.72 03/25/09 ND 18.30 922.75
12/20-21/11 ND 14.90 922.61 12/20-21/11 ND 11.73 926.30 12/20-21/11 ND 18.22 922.8306/05-06/12 ND 17.16 920.35 06/05-06/12 ND 12.83 923.13 06/05-06/12 ND 19.02 922.03
12/18/12 ND 19.87 917.64 12/19/12 ND 16.11 919.85 12/18/12 ND 24.80 916.25
05/14/13 ND 14.54 922.97 05/15/13 ND 11.45 924.51 05/14/13 ND 17.68 923.3712/09/13 ND 16.63 920.88 12/09/13 ND 13.23 922.73 12/09/13 ND 19.55 921.50
05/13/14 ND 13.23 924.28 05/13/14 ND 9.94 926.02 05/14/14 ND 16.39 924.66
12/14/14 ND 18.30 919.21 12/14/14 ND 14.60 921.36 12/14/14 ND 20.81 920.2406/09/15 ND 17.22 920.29 06/10/15 ND NM ---06/09/15 ND 19.31 921.74
12/8/15 ND 13.84 923.67 12/9/15 ND NM ---12/8/15 ND 16.83 924.226/28/16 ND 13.54 923.53 6/28/16 ND 11.35 924.61 6/29/16 ND 16.51 924.54
12/12/16 ND 19.91 917.60 12/12/16 ND 16.00 919.96 12/13/16 ND 21.55 919.50
06/07/17 ND 11.86 925.65 06/08/17 ND 11.26 924.7 06/08/17 ND 19.56 921.49
12/12/17 NM NM NM 12/12/17 NM NM NM 12/12/17 NM NM NM
05/15/18 NM NM NM 05/15/18 NM NM NM 05/15/18 NM NM NM11/27/18 NM NM NM 11/27/18 NM NM NM 11/27/18 NM NM NM
05/21/19 NM NM NM 05/21/19 NM NM NM 05/21/19 NM NM NM
11/25/19 NM NM NM 11/25/19 NM NM NM 11/25/19 NM NM NM
06/01/20 NM NM NM 06/01/20 NM NM NM 06/01/20 NM NM NM
MW-22 937.51 ?-25 MW-23
935.96*
7.5-22.5 MW-24 941.05 10-25
DRY DRY
938.03
20210520.001A PAGE 10 OF 11
TABLE 3: HISTORICAL GROUNDWATER ELEVATION DATA, cont.
Well No. Date Measured
TOC Elevation(feet)
Screen Depth Interval(feet,bgs)
Free Product Thickness (inches)
Depth to Groundwater(feet, btoc)
†Groundwater
Elevation(feet)Well No. Date Measured
TOC Elevation(feet)
Screen Depth Interval(feet,bgs)
Free Product Thickness (inches)
Depth to Groundwater(feet, btoc)
†Groundwater
Elevation(feet)Well No. Date Measured TOC Elevation(feet)
Screen Depth Interval(feet,bgs)
Free Product Thickness (inches)
Depth to Groundwater(feet, btoc)
†Groundwater
Elevation(feet)
06/18/02 ND 20.12 915.09 06/18/02 ND 23.82 916.05 01/06/97 ND 15.01 918.80
01/14/04 ND 14.02 921.19 01/14/04 ND 17.68 922.19 03/11/97 NM NM NM05/24/06 ND 17.92 917.29 05/24/06 ND 21.78 918.09 05/20/97 NM NM NM
04/25/07 ND 12.92 922.29 04/25/07 ND 15.82 924.05 06/18/02 ND 22.21 911.60
07/26/07 ND 15.35 919.86 07/26/07 ND 19.51 920.36 01/14/04 ND 14.63 919.1810/23/07 ND 18.46 916.75 10/23/07 ND 22.64 917.23 05/24/06 ND 19.40 914.41
03/19/08 ND 15.77 919.44 03/19/08 ND 19.20 920.67 04/25/07 ND 13.42 920.39
09/23/08 ND 14.59 920.62 09/23/08 ND 18.13 921.74 07/26/07 ND 19.27 914.5403/25/09 ND 13.00 922.21 03/25/09 ND 16.22 923.65 10/23/07 ND 22.39 911.42
12/20-21/11 ND 12.75 922.46 12/20-21/12 ND 15.97 923.90 03/19/08 ND 17.28 916.53
06/05-06/12 ND 13.12 922.09 06/05-06/12 ND 16.98 922.89 09/23/08 ND 16.38 917.43
12/19/12 ND 16.12 919.09 12/19/12 ND 19.95 919.92 03/25/09 ND 14.35 919.46
05/15/13 ND 12.32 922.89 05/15/13 ND 15.37 924.50 12/20-21/11 ND 13.03 920.78
12/10/13 ND 13.54 921.67 12/09/13 ND 17.12 922.75 06/05-06/12 ND 15.30 918.51
05/15/14 ND 10.94 924.27 05/14/14 ND 14.26 925.61 12/18/12 ND 18.15 915.66
12/14/14 ND 14.93 920.28 12/14/14 ND 18.85 921.02 05/15/13 ND 12.77 921.0406/10/15 ND 13.74 921.47 06/09/15 ND 17.29 922.58 12/11/13 ND 14.25 919.5612/8/15 ND 11.78 923.43 12/8/15 ND 14.58 925.29 05/14/14 ND 11.89 921.92
6/29/16 ND 11.84 923.37 6/29/16 ND 13.54 926.33 12/15/14 ND 16.84 916.9712/12/16 ND 16.23 918.98 12/13/16 ND 20.10 919.77 06/10/15 ND 15.63 918.1806/07/17 ND 12.24 922.97 06/08/17 ND 15.18 924.69 12/9/15 ND 12.42 921.3912/12/17 ND 16.97 918.24 12/12/17 NM NM NM 6/29/16 ND 12.75 921.06
05/15/18 ND 12.88 922.33 05/15/18 NM NM NM 12/13/16 ND 17.70 916.11
11/27/18 ND 10.41 924.80 11/27/18 NM NM NM 06/08/17 ND 11.69 922.125/22/2019 ND 11.05 924.16 5/21/2019 NM NM NM 12/12/17 NM NM NM
11/26/2019 ND 13.37 921.84 11/25/2019 NM NM NM 05/15/18 NM NM NM
6/2/2020 ND 9.64 925.57 6/1/2020 NM NM NM 11/27/18 NM NM NM5/21/2019 NM NM NM
NOTES:11/25/2019 NM NM NM
1) bgs = below ground surface 6/2/2020 ND 9.25 924.562) TOC = Top of well casing
3) btoc = below top of casing
4) ND = Not detected5) * = TOC resurveyed
6) NM = Not Measured7) ? = Screen interval is unknown8) † = Corrected for free product thickness
MW-34 933.81 ?-24
MW-27 935.21 ?-25 MW-28 939.87 ?-25
20210520.001A PAGE 11 OF 11
TABLE 4: FIELD NATURAL ATTENUATION DATA
Well No.MW-2S MW-2D MW-4 MW-5SR MW-5DR MW-6 MW-7 MW-8 MW-9 MW-10 MW-11s MW-11D
Date Measured 06/01/20 06/01/20 NM 06/01/20 06/01/20 NM NM NM NM NM NM 06/02/20
SP. COND.
(µS/cm)360 105 NM 28 443 NM NM NM NM NM NM NM
Dissolved Oxygen
Content
(mg/L)
0.95 0.12 NM 0.77 0.19 NM NM NM NM NM NM NM
Water Temperature
(degrees Celsius)17.28 18.66 NM 17.70 18.68 NM NM NM NM NM NM NM
ORP
(mV) -58.4 -21.4 NM -71.1 5.4 NM NM NM NM NM NM NM
*pH 5.77 5.75 NM 6.07 5.89 NM NM NM NM NM NM NM
Well No.MW-13 MW-14 MW-16 MW-17 MW-17D MW-19 MW-20 MW-21 MW-21D MW-22 MW-23 MW-24 MW-27 MW-28 MW-34
Date Measured NM NM NM 06/02/20 NM NM NM 06/01/20 06/01/20 NM NM NM 06/02/20 NM 06/02/20
SP. COND.
(µS/cm)NM NM NM 151 NM NM NM 194 439 NM NM NM 639 NM 6
Dissolved Oxygen
Content
(mg/L)
NM NM NM 0.22 NM NM NM 0.86 0.11 NM NM NM 0.17 NM 1.24
Water Temperature
(degrees Celsius)NM NM NM 20.90 NM NM NM 19.21 20.09 NM NM NM 37.02 NM 17.74
ORP
(mV) NM NM NM -42.3 NM NM NM 28.0 -32.6 NM NM NM -47.6 NM 186.1
*pH NM NM NM 5.78 NM NM NM 5.10 6.17 NM NM NM 5.39 NM 3.84
NOTES:
1) * unitless.
2) mV = millivolts.
3) mg/L = milligrams per liter.4) µS/cm = microsiemens per centimeter.
5) NM = Not Measured.
6) ORP = oxidation reduction potentional.
20210520.001A PAGE 1 OF 1
Well No.
Date Measured 12/17/12 05/15/13 12/10/13 05/12/14 12/15/14 06/10/15 12/07/15 06/28/16 12/13/16 06/07/17 12/12/17 05/15/18 11/27/18 5/21/19 11/25/19 6/1/20
GW Elevation DRY 922.28 920.51 923.30 919.20 920.23 923.52 922.38 918.34 922.86 DRY 921.89 924.57 923.27 921.15 925.20
*pH DRY 6.25 6.57 6.51 NM 6.54 5.97 6.64 NM 6.54 DRY 6.41 6.65 6.51 6.59 5.77
Water
Temperature
(degrees Celsius)
DRY 16.86 16.2 16.33 NM 16.30 18.09 17.12 NM 17.2 DRY 17.2 18.6 17.4 18.5 17.28
SP. COND.
(µS/cm)DRY 379 383 395 NM 439.7 350 407 NM 442 DRY 509 439.9 1.1 0.489 360
Dissolved Oxygen
Content
(mg/L)
DRY 0.14 0.22 0.22 NM 0.21 0.04 0.56 NM 0.21 DRY 0.05 0.10 0.07 0.41 0.95
ORP
(mV)DRY -100.6 -108.0 -111.5 NM -91.9 -5.7 -111.2 NM -89.2 DRY -129.7 -112.9 -4.3 -125.4 -58.4
Well No.
Date Measured 12/17/12 05/13/13 12/10/13 05/12/14 12/15/14 06/09/15 12/07/15 06/28/16 12/13/16 06/07/17 12/12/17 05/15/18 11/27/18 5/21/19 11/25/19 6/1/20
GW Elevation 917.28 922.16 920.31 923.16 918.75 919.86 922.96 923.01 917.67 922.65 916.66 921.56 924.02 921.84 920.98 925.01
*pH 6.43 6.14 6.44 6.18 6.12 6.09 5.83 6.89 6.36 6.31 6.07 5.99 6.19 6.10 6.31 5.75
Water
Temperature
(degrees Celsius)
17.2 17.57 17.2 17.43 17.2 17.4 17.36 17.81 17.10 17.3 17.8 17.5 17.3 18.5 18.5 18.7
SP. COND.
(µS/cm)123.8 143 120.3 142 119 135.1 124 108 114 128 121.5 131.7 115.7 119.5 0.127 105
Dissolved Oxygen
Content
(mg/L)
0.11 0.03 0.06 0.09 0.16 0.14 0.05 0.2 0.11 0.18 0.11 0.01 0.01 0.03 0.10 0.12
ORP
(mV)-152.3 -123.3 -47.4 -28.1 -23.9 28.3 129.6 -112.3 -51.7 -13.0 -3.6 -37.0 5.2 -24.6 -31.1 -21.4
Well No.
Date Measured 12/19/12 05/16/13 12/10/13 05/15/14 12/15/14 06/10/15 12/09/15 06/29/16 12/12/16 06/07/17 12/12/17 05/15/18 11/27/18 5/22/19 11/26/19 6/1/20
GW Elevation 913.39 917.20 915.84 918.10 914.77 915.66 917.91 915.51 913.43 917.80 912.97 916.84 918.95 922.49 916.29 NM
*pH 5.54 5.74 5.96 5.81 5.51 5.97 6.53 6.59 NM 6.42 4.75 6.13 6.28 6.26 6.20 NM
Water
Temperature
(degrees Celsius)
17.9 16.87 17.8 16.16 18.1 16.7 18.91 17.43 NM 18.5 18.9 17.5 19.6 18.1 20.2 NM
SP. COND.
(µS/cm)78.6 145 139.5 177 125.5 178.5 218 211 NM 257 77.8 226.8 236.5 172.9 0.247 NM
Dissolved Oxygen
Content
(mg/L)
0.26 0.14 0.18 0.17 0.42 0.15 0.49 1.2 NM 0.24 0.7 0.19 0.05 0.03 0.49 NM
ORP
(mV)81.2 21.3 -3.4 143.5 113.2 21.1 -14.9 -65.6 NM -91.3 80.9 -64.7 -87.4 -50.6 -80.6 NM
Well No.
Date Measured 12/17/12 05/13/13 12/10/13 05/12/14 12/14/14 06/09/15 12/07/15 06/27/16 12/12/16 06/07/17 12/12/17 05/15/18 11/27/18 5/21/19 11/25/19 6/1/20
GW Elevation 912.33 917.77 916.06 917.22 913.82 914.24 918.55 915.80 911.93 917.99 911.19 917.14 921.02 919.10 913.57 921.44
*pH 6.19 6.08 6.25 6.34 6.08 6.08 5.98 6.60 6.36 6.35 6.06 6.34 6.42 5.87 6.51 6.07
Water
Temperature
(degrees Celsius)
17.0 17.22 17.3 17.16 16.9 16.7 17.25 17.05 17.50 17.10 17.4 17.6 17.9 17.1 19.8 17.7
SP. COND.
(µS/cm)358.5 416 318.7 321 406.7 382.6 335 337 410.7 318 346.7 336.0 303.2 273.5 0.356 28
Dissolved Oxygen
Content
(mg/L)
0.38 0.05 0.03 0.19 0.15 NM 0.08 1.23 0.22 0.22 0.45 1.24 0.04 5.5 0.40 0.77
ORP
(mV)-29.0 -41.7 -34.1 -35.2 12.6 -5.3 28.8 4.5 -32.4 -9.2 -41.2 -73.3 -65.3 -41.5 -72.9 -71.1
TABLE 5: HISTORICAL FIELD NATURAL ATTENUATION DATA
MW-2S
MW-2D
MW-4
MW-5SR
20210520.001A PAGE 1 OF 7
TABLE 5: HISTORICAL FIELD NATURAL ATTENUATION DATA
Well No.
Date Measured 12/17/12 05/13/13 12/10/13 05/12/14 12/15/14 06/09/15 12/07/15 06/27/16 12/12/16 06/07/17 12/12/17 05/15/18 11/27/18 5/21/19 11/25/19 6/1/20
GW Elevation 910.91 914.61 913.06 915.05 911.42 911.49 915.27 913.34 908.81 914.69 909.58 912.60 916.18 914.94 918.39 916.93
*pH 6.42 6.23 6.43 6.35 NM 6.33 5.89 6.62 6.45 6.44 6.28 6.21 6.35 6.26 6.45 5.89
Water
Temperature
(degrees Celsius)
16.9 17.0 16.9 17.37 NM 17.3 17.15 17.66 17.10 17.20 17.3 17.6 17.4 18.0 18.5 18.68
SP. COND.
(µS/cm)486.4 519 439.2 492 NM 500.4 492 490 492.8 521 505.6 493.9 443.5 387.5 0.809 443
Dissolved Oxygen
Content
(mg/L)
0.15 0.03 0.04 0.15 NM 0.16 0.08 0.32 0.14 0.22 0.19 0.14 0.05 0.33 2.45 0.19
ORP
(mV)-7.4 -4.5 -24.9 -1.5 NM 25.0 156.7 23.0 -5.8 25.5 -11.4 17.1 17.0 9.3 18.6 5.4
Well No.
Date Measured 12/19/12 05/16/13 12/11/13 05/15/14 12/14/14 06/09/15 12/09/15 06/27/16 12/12/16 06/07/17 12/12/17 05/15/18 11/28/18 5/22/19 11/26/19 6/1/20
GW Elevation 917.16 921.40 919.47 922.28 917.56 918.16 920.48 921.15 916.88 921.28 915.98 920.68 924.08 922.66 920.28 NM
*pH 4.71 4.53 4.73 4.64 4.20 3.75 4.80 4.83 4.47 4.49 4.63 4.75 4.55 4.87 5.24 NM
Water
Temperature
(degrees Celsius)
22.9 21.34 22.1 20.14 22.0 20.2 22.76 22.00 22.5 21.2 22.9 21.1 22.6 20.7 23.0 NM
SP. COND.
(µS/cm)22.9 41 36.7 41 42 37.6 45 51 26 50 49.5 92.7 44.9 86.7 0.072 NM
Dissolved Oxygen
Content
(mg/L)
0.46 0.23 0.11 0.12 0.26 0.13 0.20 0.95 0.54 0.32 0.20 0.57 0.06 0.20 0.38 NM
ORP
(mV)191.3 183.7 205.4 465.1 118.3 -60.1 101.5 59.7 241.7 241.9 135.8 87.9 191.3 77.2 179.1 NM
Well No.
Date Measured 12/19/12 05/16/13 12/11/13 05/13/14 12/14/14 06/09/15 12/07/15 06/27/16 12/12/16 06/07/17 12/12/17 05/15/18 11/27/18 5/21/19 11/25/19 6/1/20
GW Elevation 912.95 917.14 915.95 917.56 913.48 914.81 917.36 916.38 910.24 916.54 NM NM NM NM NM NM
*pH 6.17 5.29 5.80 4.86 6.01 4.67 5.60 5.65 6.32 5.92 NM NM NM NM NM NM
Water
Temperature
(degrees Celsius)
19.6 18.0 17.9 17.62 18.3 17.3 18.52 17.98 18.80 18.30 NM NM NM NM NM NM
SP. COND.
(µS/cm)168.2 75 94.4 62 186.9 86.7 144 124 196 149 NM NM NM NM NM NM
Dissolved Oxygen
Content
(mg/L)
0.67 5.11 3.71 4.54 0.86 3.87 1.81 1.97 0.25 0.65 NM NM NM NM NM NM
ORP
(mV)146.9 173.4 201.4 209.7 142.8 -54.6 199.2 41.8 71.9 54.2 NM NM NM NM NM NM
Well No.
Date Measured 12/19/12 05/15/13 12/10/13 05/13/14 12/15/14 06/09/15 12/07/15 06/28/16 12/12/16 06/07/17 12/12/17 05/15/18 11/27/18 5/21/19 11/25/19 6/1/20
GW Elevation 918.70 923.53 922.35 925.74 916.94 921.39 924.62 923.41 917.89 923.43 NM NM NM NM NM NM
*pH 4.64 4.38 4.82 4.39 4.40 4.62 5.66 4.72 4.68 4.64 NM NM NM NM NM NM
Water
Temperature
(degrees Celsius)
18.6 17.19 18.2 17.05 18.6 16.8 18.71 17.79 18.50 17.40 NM NM NM NM NM NM
SP. COND.
(µS/cm)48.1 49 73.4 70 58.3 92.6 52 54 49 46 NM NM NM NM NM NM
Dissolved Oxygen
Content
(mg/L)
3.80 9.22 5.67 5.24 5.02 4.24 5.66 4.13 2.70 3.46 NM NM NM NM NM NM
ORP
(mV)398.0 319.0 369.2 252.7 310.8 268.5 198.5 59.7 256.0 226.7 NM NM NM NM NM NM
MW-5DR
MW-6
MW-7
MW-8
20210520.001A PAGE 2 OF 7
TABLE 5: HISTORICAL FIELD NATURAL ATTENUATION DATA
Well No.
Date Measured 12/19/12 05/14/13 12/09/13 05/14/14 12/14/14 06/09/15 12/08/15 6/28/2016 12/13/16 06/07/17 12/12/17 05/15/18 11/27/18 5/21/19 11/25/19 6/1/20
GW Elevation 921.88 922.72 924.16 924.30 919.70 921.19 923.15 924.09 NM 922.86 NM NM NM NM NM NM
*pH 5.26 4.98 5.33 5.21 5.33 NM 5.11 5.43 NM NM NM NM NM NM NM NM
Water
Temperature
(degrees Celsius)
19.2 17.76 14.2 21.37 17.9 NM 18.99 21.69 NM NM NM NM NM NM NM NM
SP. COND.
(µS/cm)42.5 44 42.8 41 50.2 NM 47 41 NM NM NM NM NM NM NM NM
Dissolved Oxygen
Content
(mg/L)
3.14 6.51 5.11 7.70 1.37 NM 4.41 1.87 NM NM NM NM NM NM NM NM
ORP
(mV)280.0 241.8 289.3 254.0 178.3 NM 209.4 81.8 NM NM NM NM NM NM NM NM
Well No.
Date Measured 12/19/12 05/14/13 12/09/13 05/14/14 12/14/14 06/10/15 12/08/15 06/28/16 12/13/16 06/08/17 12/12/17 05/15/18 11/27/18 5/21/19 11/25/19 6/1/20
GW Elevation 919.25 923.66 921.58 922.68 918.35 921.15 922.79 921.37 917.70 920.94 NM NM NM NM NM NM
*pH NM 4.70 4.97 4.76 4.59 3.98 4.60 4.99 4.12 4.78 NM NM NM NM NM NM
Water
Temperature
(degrees Celsius)
NM 18.39 17.7 18.0 18.0 17.4 18.71 17.83 18.1 18.1 NM NM NM NM NM NM
SP. COND.
(µS/cm)NM 41 35.9 44 39 43 40 40 39 42 NM NM NM NM NM NM
Dissolved Oxygen
Content
(mg/L)
NM 2.02 1.42 3.4 1.21 NM 3.47 4.16 1.24 2.99 NM NM NM NM NM NM
ORP
(mV)NM 264.4 298.5 269.3 211.6 249.5 210.4 88.2 101.1 195.2 NM NM NM NM NM NM
Well No.
Date Measured 12/18/12 05/13/13 12/10/13 05/12/14 12/15/14 06/09/15 12/07/15 06/29/16 12/13/16 06/08/17 12/12/17 05/15/18 11/27/18 5/21/19 11/25/19 6/1/20
GW Elevation 907.35 911.12 909.66 910.40 908.29 908.17 907.06 913.20 907.40 909.87 NM NM NM NM NM NM
*pH 5.45 4.77 5.49 4.74 5.20 4.76 5.54 5.55 NM NM NM NM NM NM NM NM
Water
Temperature
(degrees Celsius)
16.8 15.18 16.2 15.07 16.0 15.0 16.25 16.9 NM NM NM NM NM NM NM NM
SP. COND.
(µS/cm)40.7 43 37.2 50 41.3 44.2 45 40 NM NM NM NM NM NM NM NM
Dissolved Oxygen
Content
(mg/L)
0.08 0.06 0.04 0.45 0.17 NM 0.34 0.84 NM NM NM NM NM NM NM NM
ORP
(mV)301.4 254.8 320.4 371.3 547.0 348.8 54.8 34.6 NM NM NM NM NM NM NM NM
Well No.
Date Measured 12/18/12 05/13/13 12/10/13 05/12/14 12/15/14 06/09/15 12/07/15 6/29/2016 12/13/16 06/08/17 12/12/17 05/15/18 11/27/18 5/23/19 11/25/19 6/2/20
GW Elevation 906.64 910.36 908.93 909.69 907.60 907.48 910.73 908.14 905.96 909.56 905.59 908.73 911.02 909.08 908.95 910.68
*pH 6.35 6.19 6.44 6.12 NM 6.28 5.85 6.68 NM NM NM NM NM NM NM NM
Water
Temperature
(degrees Celsius)
16.9 16.95 16.8 17.12 NM 17.1 17.23 16.58 NM NM NM NM NM NM NM NM
SP. COND.
(µS/cm)188.9 234 203.7 235 NM 231.9 225 219 NM NM NM NM NM NM NM NM
Dissolved Oxygen
Content
(mg/L)
0.10 0.07 3.70 0.12 NM 0.65 3.06 1.78 NM NM NM NM NM NM NM NM
ORP
(mV)28.2 -12.3 37.8 57.3 NM 100.0 189.4 42.5 NM NM NM NM NM NM NM NM
MW-11S
MW-10
MW-9
MW-11D
20210520.001A PAGE 3 OF 7
TABLE 5: HISTORICAL FIELD NATURAL ATTENUATION DATA
Well No.
Date Measured 12/19/12 05/15/13 12/10/13 05/15/14 12/15/15 06/09/15 12/08/15 06/27/16 12/12/16 06/08/17 12/12/17 05/15/18 11/27/18 5/21/19 11/25/19 6/1/20
GW Elevation 915.36 919.33 917.34 919.68 915.59 916.18 919.80 918.42 914.30 920.37 NM NM NM NM NM NM
*pH NM 5.84 6.22 5.92 6.07 5.52 6.76 6.45 NM 5.67 NM NM NM NM NM NM
Water
Temperature
(degrees Celsius)
NM 20.9 21.7 20.02 24.0 21.5 24.35 23.74 NM 21.5 NM NM NM NM NM NM
SP. COND.
(µS/cm)NM 77 95.6 105 76 98.8 96 84 NM 88.7 NM NM NM NM NM NM
Dissolved Oxygen
Content
(mg/L)
NM 1.53 5.21 0.52 0.80 0.25 1.45 1.03 NM 2.13 NM NM NM NM NM NM
ORP
(mV)NM 126.0 133.4 223.1 167.1 -71.6 32.2 37.5 NM NM NM NM NM NM NM NM
Well No.
Date Measured 12/19/12 05/16/13 12/10/13 05/15/14 12/15/14 06/09/15 12/07/15 06/27/16 12/12/16 06/08/17 12/12/17 05/15/18 11/27/18 5/21/19 11/25/19 6/1/20
GW Elevation 913.23 917.83 917.16 917.58 915.77 914.66 918.98 916.36 913.58 917.21 NM NM NM NM NM NM
*pH 5.17 4.49 4.89 4.46 4.36 4.41 5.27 5.41 4.23 4.30 NM NM NM NM NM NM
Water
Temperature
(degrees Celsius)
18.4 15.75 15.1 14.67 17.1 15.3 18.44 16.67 18.70 17.0 NM NM NM NM NM NM
SP. COND.
(µS/cm)89.5 94 107.4 110 143.4 148.7 132 135 120 125.1 NM NM NM NM NM NM
Dissolved Oxygen
Content
(mg/L)
2.79 0.42 0.61 0.39 0.59 0.41 0.81 1.65 4.9 1.09 NM NM NM NM NM NM
ORP
(mV)182.7 242.7 248.5 277.0 191.5 -30.0 93.9 34.6 162.0 NM NM NM NM NM NM NM
Well No.
Date Measured 12/19/12 05/16/13 12/10/13 05/15/14 12/15/14 06/09/15 12/07/15 06/29/16 12/12/16 06/07/17 12/12/17 05/15/18 11/27/18 5/21/19 11/25/19 6/1/20
GW Elevation 909.93 915.46 915.91 915.71 911.74 915.67 916.80 913.18 910.38 915.28 NM NM NM NM NM NM
*pH 5.84 5.31 5.50 4.90 NM 4.38 5.42 5.53 4.98 5.46 NM NM NM NM NM NM
Water
Temperature
(degrees Celsius)
18.3 17.42 17.2 15.9 NM 16.7 18.62 17.56 17.9 17.5 NM NM NM NM NM NM
SP. COND.
(µS/cm)144.2 88 87.4 65 NM 61.8 77 69 110 91 NM NM NM NM NM NM
Dissolved Oxygen
Content
(mg/L)
0.27 2.60 0.28 0.20 NM 0.62 4.99 1.42 0.2 1.0 NM NM NM NM NM NM
ORP
(mV)-15.3 161.7 92.7 368.7 NM 20.2 76.8 80.3 119.4 97.9 NM NM NM NM NM NM
Well No.
Date Measured 12/18/12 05/15/13 12/09/13 05/14/14 12/15/14 06/09/15 12/08/15 06/28/16 12/12/16 06/07/17 12/12/17 05/15/18 11/27/18 5/22/19 11/26/19 6/2/20
GW Elevation 918.22 922.18 920.26 923.09 910.86 920.00 922.56 922.11 917.56 921.97 916.84 921.41 924.18 923.36 921.15 925.94
*pH 6.34 6.13 6.34 6.14 6.30 6.11 6.86 6.76 6.13 6.36 6.21 6.31 6.26 5.75 5.96 5.78
Water
Temperature
(degrees Celsius)
20.2 19.44 20.0 19.53 20.2 19.0 20.32 19.90 19.90 19.90 20.4 20.0 20.9 19.6 20.9 20.9
SP. COND.
(µS/cm)468.4 422 454.1 394 518 511.4 564 396 560 556 553 546 416.5 261.4 0.421 151
Dissolved Oxygen
Content
(mg/L)
0.21 0.12 0.45 0.11 0.06 NM 0.07 0.28 0.22 0.23 0.18 0.08 0.02 0.07 0.70 0.22
ORP
(mV)-86.8 -50.2 -88.9 -37.6 -241.1 -52.5 -56.0 -66.6 -66.4 -77.8 -100.9 -74.6 -63.9 29.2 -71.1 -42.3
MW-16
MW-14
MW-13
MW-17
20210520.001A PAGE 4 OF 7
TABLE 5: HISTORICAL FIELD NATURAL ATTENUATION DATA
Well No.
Date Measured 12/15/14 06/09/15 12/07/15 06/28/16 12/12/16 6/7/2017 12/12/17 05/15/18 11/27/18 5/21/19 11/25/19 6/1/2020
GW Elevation NM NM NM NM NM NM NM NM NM NM NM NM
*pH NM 6.93 6.53 7.55 NM NM NM NM NM NM NM NM
Water
Temperature
(degrees Celsius)
NM 20.0 19.79 17.88 NM NM NM NM NM NM NM NM
SP. COND.
(µS/cm)NM 225.8 221 204 NM NM NM NM NM NM NM NM
Dissolved Oxygen
Content
(mg/L)
NM 3.05 1.54 5.37 NM NM NM NM NM NM NM NM
ORP
(mV)NM 76.3 184.1 36.5 NM NM NM NM NM NM NM NM
Well No.
Date Measured 12/19/12 05/14/13 12/09/13 05/13/14 12/15/14 06/10/15 12/07/15 6/28/2016 12/12/16 06/08/17 12/12/17 05/15/18 11/27/18 5/22/19 11/26/19 6/1/20
GW Elevation 922.69 926.16 924.72 927.79 923.47 924.92 927.26 927.26 922.56 926.15 921.06 925.56 928.84 928.16 925.74 NM
*pH 5.68 5.63 5.76 5.59 5.23 5.20 6.35 6.15 5.28 5.56 5.36 5.33 5.45 5.17 5.42 NM
Water
Temperature
(degrees Celsius)
20.7 17.89 17.5 17.73 20.1 17.6 20.28 18.65 20.40 18.9 20.2 18.4 20.4 18.1 20.9 NM
SP. COND.
(µS/cm)122.7 132 123.6 138 133.8 122.2 118 101 121 106 112.7 105.6 85.9 96.1 0.002 NM
Dissolved Oxygen
Content
(mg/L)
0.10 0.06 0.23 0.18 0.13 0.12 0.07 0.47 0.18 0.22 0.57 0.13 0.01 4.19 0.08 NM
ORP
(mV)-16.3 -8.7 3.5 26.3 50.5 64.1 40.0 -36.7 8.2 41.7 30.5 16.1 32.3 -6.7 52.5 NM
Well No.
Date Measured 12/19/12 05/14/13 12/09/13 05/13/14 12/15/14 06/09/15 12/07/15 6/28/16 12/12/16 06/08/17 12/12/17 05/15/18 11/27/18 5/22/19 11/26/19 6/1/20
GW Elevation 918.36 922.80 921.13 924.35 919.92 921.45 923.69 923.58 917.34 922.93 918.44 922.35 925.59 925.09 922.68 NM
*pH 5.94 5.91 5.94 5.74 5.41 5.39 5.98 6.71 5.59 6.03 5.78 5.9 5.95 5.75 6.05 NM
Water
Temperature
(degrees Celsius)
20.3 19.76 19.7 19.54 20.5 19.4 20.95 19.97 20.5 20.3 20.5 20.6 21.1 21.5 21.1 NM
SP. COND.
(µS/cm)316.3 332 296.5 131 270.9 278.0 150 276 312 351 356.2 351.8 283.6 20.2 0.173 NM
Dissolved Oxygen
Content
(mg/L)
0.88 0.11 0.37 0.26 0.32 NM 0.11 0.67 0.18 0.31 0.33 0.26 0.05 0.05 0.39 NM
ORP
(mV) -76.5 -18.9 -65.5 31.5 36.7 29.9 58.3 -111.5 -7 -4.8 -47.1 -42.2 -41.9 -15.8 -21.5 NM
Well No.
Date Measured 12/17/12 05/14/13 12/09/13 05/13/14 12/15/14 06/10/15 12/08/15 06/28/16 12/13/16 06/08/17 12/12/17 05/15/18 11/27/18 5/21/19 11/25/19 6/1/20
GW Elevation 919.33 922.71 921.03 924.27 919.84 921.27 923.43 923.58 919.03 922.80 918.48 922.35 925.63 925.18 922.60 926.20
*pH 5.39 5.38 5.47 5.27 5.16 4.86 5.28 5.92 5.36 5.53 4.96 5.19 5.47 5.17 5.51 5.1
Water
Temperature
(degrees Celsius)
19.5 18.61 19.1 18.71 19.5 18.4 19.81 18.91 19.7 18.80 19.2 17.9 20.2 18.9 20.1 19.21
SP. COND.
(µS/cm)99.9 111 101.3 109 112.1 124.6 126 121 100.8 141 120.4 174.8 135.9 133.6 0.009 194
Dissolved Oxygen
Content
(mg/L)
0.49 0.37 0.12 0.42 0.45 NM 0.29 0.35 0.76 0.60 0.48 0.26 0.02 0.06 0.19 0.86
ORP
(mV) -19.8 55.8 56.2 74.6 71.4 82.4 184.0 -33.8 119.3 55.8 44.2 1.9 19.5 11.6 50.0 28.0
MW-21
MW-17D
MW-20
MW-19
20210520.001A PAGE 5 OF 7
TABLE 5: HISTORICAL FIELD NATURAL ATTENUATION DATA
Well No.
Date Measured 12/17/12 05/13/13 12/10/13 05/12/14 12/15/14 06/10/15 12/08/15 06/28/16 12/13/16 06/08/17 12/12/17 05/15/18 11/27/18 5/21/19 11/25/19 6/1/20
GW Elevation 919.95 922.50 919.99 924.05 919.62 921.03 923.00 923.24 918.79 922.48 918.21 922.11 924.64 924.77 922.37 926.04
*pH 6.58 6.35 6.53 6.38 6.43 6.27 5.98 6.05 6.56 6.45 6.36 6.26 6.33 6.45 6.51 6.17
Water
Temperature
(degrees Celsius)
18.4 18.62 18.5 18.81 18.5 18.7 18.5 18.56 18.3 18.5 18.6 18.7 18.5 21.3 19.4 20.09
SP. COND.
(µS/cm)409.7 446 380.8 451 447.3 461.6 468 459 451.2 500 462.4 463.5 423.9 461.7 0.426 439
Dissolved Oxygen
Content
(mg/L)
0.22 0.11 0.05 0.15 0.09 0.10 0.25 0.21 0.19 0.2 0.09 0.25 0.14 0.18 0.13 0.11
ORP
(mV) -67.8 -52.1 -74.9 -47.5 -65.3 -7.7 131.4 -189.2 -73.9 -74.8 -47.5 -55.5 -18.3 -29.2 -82.3 -32.6
Well No.
Date Measured 12/18/12 05/14/13 12/09/13 05/13/14 12/14/14 06/09/15 12/08/15 06/28/16 12/12/16 06/07/17 12/12/17 05/15/18 11/27/18 5/21/19 11/25/19 6/1/20
GW Elevation 917.64 922.97 920.88 922.28 919.21 NM 923.67 923.53 917.60 925.65 NM NM NM NM NM NM
*pH NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM
Water
Temperature
(degrees Celsius)
NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM
SP. COND.
(µS/cm)NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM
Dissolved Oxygen
Content
(mg/L)
NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM
ORP
(mV)NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM NM
Well No.
Date Measured 12/19/12 05/15/13 12/09/13 05/13/14 12/15/14 06/10/15 12/09/15 06/28/16 12/12/16 06/08/17 12/12/17 05/15/18 11/27/18 5/21/19 11/25/19 6/1/20
GW Elevation 921.92 926.58 924.80 928.02 921.36 NM NM 924.61 919.96 924.70 NM NM NM NM NM NM
*pH 4.58 4.15 4.53 4.27 4.33 NM 4.44 4.78 3.88 3.80 NM NM NM NM NM NM
Water
Temperature
(degrees Celsius)
18.5 17.84 17.4 18.06 18.3 NM 18.33 18.19 18.2 18.3 NM NM NM NM NM NM
SP. COND.
(µS/cm)28.2 27 28.6 30 29.6 NM 30 33 30 35.6 NM NM NM NM NM NM
Dissolved Oxygen
Content
(mg/L)
0.17 0.84 0.67 1.02 0.53 NM 0.80 1.33 0.41 0.92 NM NM NM NM NM NM
ORP
(mV)394.7 321.7 322.0 371.0 279.0 NM 154.1 31.7 144.7 NM NM NM NM NM NM NM
Well No.
Date Measured 12/18/12 05/14/13 12/09/13 05/14/14 12/14/14 06/09/15 12/08/15 06/28/16 12/13/16 06/08/17 12/12/17 05/15/18 11/27/18 5/21/19 11/25/19 6/1/20
GW Elevation 916.25 923.37 921.50 924.66 920.24 918.20 924.22 924.54 919.50 921.49 NM NM NM NM NM NM
*pH 6.40 6.03 6.30 5.66 6.27 5.84 6.40 6.25 6.07 5.34 NM NM NM NM NM NM
Water
Temperature
(degrees Celsius)
17.7 17.38 17.6 17.23 17.4 16.4 17.9 17.13 17.1 17.2 NM NM NM NM NM NM
SP. COND.
(µS/cm)264.4 140 193.5 100 221.2 211.3 104 109 218 104.2 NM NM NM NM NM NM
Dissolved Oxygen
Content
(mg/L)
0.09 0.12 0.29 0.73 0.19 NM 0.32 0.83 0.20 0.80 NM NM NM NM NM NM
ORP
(mV)-94.2 -16.1 -64.5 47.8 -53.1 -8.0 24.6 -26.6 -47.0 NM NM NM NM NM NM NM
MW-21D
MW-24
MW-23
MW-22
20210520.001A PAGE 6 OF 7
TABLE 5: HISTORICAL FIELD NATURAL ATTENUATION DATA
Well No.
Date Measured 12/19/12 05/16/13 12/10/13 05/15/14 12/15/14 06/10/15 12/08/15 06/29/16 12/12/16 06/07/17 12/12/17 05/15/18 11/27/18 5/22/19 11/26/19 6/2/20
GW Elevation 919.09 922.89 921.67 924.27 920.28 921.47 923.43 923.37 918.98 922.97 918.24 922.33 924.80 924.16 921.84 925.57
*pH 5.02 5.10 5.14 5.24 5.26 5.33 5.33 6.03 5.38 5.44 5.17 5.11 5.35 5.73 5.59 5.39
Water
Temperature
(degrees Celsius)
34.1 34.25 34.5 32.67 35.7 33.1 35.32 33.67 36.20 35.5 35.2 36.3 37.5 36.5 37.4 37.02
SP. COND.
(µS/cm)3801 3393 3955 4355 4570 4579 4414 3850 4018 3550 3617 3482 2323 180.1 0.90 639
Dissolved Oxygen
Content
(mg/L)
0.12 0.06 0.18 0.12 0.15 NM 0.18 0.46 0.12 0.10 0.32 0.02 0.01 0.02 0.40 0.17
ORP
(mV)39.1 10.8 -2.7 58.7 32.7 -1.7 42.0 -53.1 -11.6 -25.8 1.5 -4 -21.1 -41.6 -108.9 -47.6
Well No.
Date Measured 12/19/12 05/15/13 12/09/13 05/14/14 12/14/14 06/09/15 12/08/15 06/29/16 12/13/16 06/08/17 12/12/17 05/15/18 11/27/18 5/21/19 11/25/19 6/1/20
GW Elevation 909.92 914.50 922.75 925.61 921.02 922.58 925.29 928.33 919.77 924.69 NM NM NM NM NM NM
*pH 4.53 4.10 4.56 4.44 4.36 3.40 4.45 4.80 4.02 3.71 NM NM NM NM NM NM
Water
Temperature
(degrees Celsius)
17.6 16.26 17.6 16.21 17.3 16.1 18.37 17.6 17.20 17.10 NM NM NM NM NM NM
SP. COND.
(µS/cm)54.3 46 48.7 38 44.5 40.6 38 33 38 36.4 NM NM NM NM NM NM
Dissolved Oxygen
Content
(mg/L)
6.92 8.77 12.39 8.87 7.95 NM 7.41 8.9 5.66 6.92 NM NM NM NM NM NM
ORP
(mV)364.1 273.3 228.1 253.6 225.0 206.3 215.5 114.1 177.3 NM NM NM NM NM NM NM
Well No.
Date Measured 12/18/12 05/15/13 12/11/13 05/14/14 12/15/14 06/10/15 12/09/15 06/29/16 12/13/16 6/8/2017 12/12/17 05/15/18 11/27/18 5/21/19 11/25/19 6/2/20
GW Elevation 915.66 921.04 919.56 921.92 916.97 918.18 933.81 921.06 916.11 922.12 NM NM NM NM NM 924.56
*pH 4.68 4.20 NM NM 4.33 4.00 NM NM NM NM NM NM NM NM NM 3.84
Water
Temperature
(degrees Celsius)
17.9 16.57 NM NM 17.5 16.2 NM NM NM NM NM NM NM NM NM 17.74
SP. COND.
(µS/cm)21.9 26 NM NM 25 24.6 NM NM NM NM NM NM NM NM NM 6
Dissolved Oxygen
Content
(mg/L)
0.13 0.34 NM NM 0.17 0.12 NM NM NM NM NM NM NM NM NM 1.29
ORP
(mV)284.4 307.3 NM NM 395.1 276.3 NM NM NM NM NM NM NM NM NM 186.1
NOTES:
1) * unitless.
2) mV = millivolts.
3) mg/L = milligrams per liter.
4) µS/cm = microsiemens per centimeter.
5) NM = Not Measured.
6) ORP = oxidation reduction potential.
MW-34
MW-28
MW-27
20210520.001A PAGE 7 OF 7
Parameter
Sample ID MW-2S MW-4 MW-5SR MW-6 MW-7 MW-8 MW-9 MW-10 MW-11S MW-13 MW-14 MW-16
Sample Date 06/01/20 ---06/01/20 ---------------------------
Volatile Organic Compounds by EPA Method 6200B (602 list)
benzene 3100 NS 820 NS NS NS NS NS NS NS NS NS 1 5000
toluene 120 NS 33 NS NS NS NS NS NS NS NS NS 600 260000
ethylbenzene 2400 NS 330 NS NS NS NS NS NS NS NS NS 600 84500
xylenes (total)1900 NS 80 NS NS NS NS NS NS NS NS NS 500 85500
Total BTEX 7520 NS 1263 NS NS NS NS NS NS NS NS NS ------
MTBE 52 J NS 180 NS NS NS NS NS NS NS NS NS 20 20000
IPE/DIPE 29 J NS 31 J NS NS NS NS NS NS NS NS NS 70 70000
Isopropylbenzene NA NS NA NS NS NS NS NS NS NS NS NS 70 25000
naphthalene 180 J NS 370 NS NS NS NS NS NS NS NS NS 6 6000
Parameter
Sample ID MW-17 MW-19 MW-20 MW-21 MW-22 MW-23 MW-24 MW-27 MW-28 MW-34
Sample Date 06/02/20 --- --- 06/01/20 --- --- --- 06/02/20 --- 06/02/20
Volatile Organic Compounds by EPA Method 6200B (602 list)
benzene 4100 NS NS 3600 NS NS NS 2800 NS <0.048 1 5000
toluene 39 J NS NS 170 NS NS NS 560 NS <0.044 600 260000
ethylbenzene 2300 NS NS 2500 NS NS NS 59 J NS <0.061 600 84500
xylenes (total)570 NS NS 6200 NS NS NS 180 J NS 3.3 500 85500
Total BTEX 7009 NS NS 12470 NS NS NS 3599 NS 3.3 --- ---
MTBE 3500 NS NS <4.2 NS NS NS 86 J NS <0.042 20 20000
IPE/DIPE 630 NS NS <5.0 NS NS NS <5.0 NS <0.050 70 70000
Isopropylbenzene NA NS NS NA NS NS NS NA NS NA 70 25000
naphthalene 420 J NS NS 230 J NS NS NS 190 J NS 9.1 6 6000
Parameter
Sample ID MW-2D MW-5DR MW-11D MW-17D MW-21DSample Date 06/01/20 06/01/20 06/02/20 ---06/01/20
Volatile Organic Compounds by EPA Method 6200B (602 list)
benzene 280 <4.8 48 NS 4900 1 5000
toluene <0.44 <4.4 <0.044 NS <4.4 600 260000
ethylbenzene 4.2 J <6.1 <0.061 NS 310 600 84500
xylenes (total)30 <15 1.9 J NS 200 J 500 85500
Total BTEX 314 <15 49.9 NS 5410 ------
MTBE 310 1200 360 NS <4.2 20 20000
IPE/DIPE 160 170 J 81 NS 140 J 70 70000
Isopropylbenzene NA NA NA NS NA 70 25000
naphthalene 100 21 J 5.8 NS 85 J 6 6000
NOTES:
1) Concentrations expressed in micrograms per liter (µg/L)5) Shaded concentrations exceed the NC 2L standard
2) NC 2L = North Carolina Groundwater Standard (April 2013)6) Bold, italic and underlined concentations equal or exceed the GCL
3) GCL = Gross Contaminant Level 7) NS = Not Sampled
4) MTBE = Methyl tert-butyl ether 8) NA = Constituent not analyzed
5) J = Detected but below the Reporting Limit; result is estimated correction
Comparison
Criteria-2L
Standards
Analytical Results
Comparison
Criteria-2L
Standards
Comparison
Criteria-GCLs
Comparison
Criteria-GCLs
TABLE 6: GROUNDWATER SAMPLE ANALYTICAL RESULTS
Analytical Results
Analytical Results Comparison
Criteria-2L
Standards
Comparison
Criteria-GCLs
20200242.001A PAGE 1 OF 1
Volatile Organic Compounds by EPA Method 602
Sample ID Sample Date Benzene Toluene Ethylbenzene Xylenes Total BTEX MTBE IPE/DIPE Isopropylbenzene Naphthalene
01/07/97 BDL BDL BDL BDL BDL NA NA NA BDL
11/18/99 BQL BQL BQL BQL BQL NA NA NA BQL
06/19/02 IA IA IA IA IA IA NA NA IA
01/14/04 BQL BQL BQL BQL BQL BQL NA NA BQL
05/25/06
05/20/97 14 66 274 968 1322 NA NA NA 128
11/18/99 NS NS NS NS NS NA NA NA NS
06/19/02 IA IA IA IA IA IA NA NA IA
01/14/04 NS NS NS NS NS NS NA NA NS
05/25/06 NS NS NS NS NS NS NS NS NS
01/24/07
01/07/97 7825 34000 3000 20000 64825 NA NA NA 650
11/18/99 7890 37400 3820 19710 68820 NA NA NA BQL
06/19/02 NS NS NS NS NS NS NA NA NS
01/14/04 8450 23920 3410 17510 53290 3440 NA NA 485
05/25/06 8750 24400 4610 28400 66160 1350 462 NA 46.9
01/24/07 9850 20500 2220 18020 50590 9.42 368 NA 191
04/26/07 9568 19744 2800 17384 49496 959 351 NA 226
07/26/07 11100 18700 3930 18536 52266 527 278 NA 323
10/25/07 NS NS NS NS NS NS NS NA NS
03/19/08 2870 11300 601 16470 31241 NA NA NA 230
09/23/08 4240 7420 1320 10020 23000 430 230 NA 252
3/25-26/09 3970 5110 652 4330 14062 NA NA NA 86.8
12/20-21/11 3250 265 502 1186 5203 543 161 NA 76.2
06/06/12 5230 352 766 1226 7574 600 212 NA 37.7
12/17/12
05/15/13 6130 863 1010 1953 9956 598 205 58.5 82.5
12/10/13 5750 1490 1300 2890 11430 445 168 53.7 126
05/12/14 5230 1130 1210 3980 11550 620 231 58.4 141
12/15/14 7280 480 2130 3780 13670 346 161 70 222
06/10/15 5300 996 1590 4218 12104 405 180 68.1 157
12/07/15 4250 1300 1450 5250 12250 311 141 55.7 127
06/28/16 3190 433 1040 4080 8743 261 115 44.9 132
12/13/16 3610 27.6 1690 1219 6547 45.6 35.2 60.6 177
06/07/17 4250 595 2100 3810 10755 118 69.9 76.3 185
12/12/17
05/15/18 3800 190 2000 3400 9390 120 150 NA 150
11/27/18 3300 280 2100 5500 11180 80 39 J NA 200
05/21/19 3600 99 1800 2200 7699 130 56 NA 210
11/25/19 4100 31 J 2500 1800 8431 48 J 33 NA 210 J
06/01/20 3100 120 2400 1900 7520 52 J 29 J NA 180 J
MW-3 05/20/97 440 1180 BQL 1500 3120 NA NA NA 380
11/18/99 9630 8300 6530 13240 37700 NA NA NA 7020
06/19/02 IA IA IA IA IA IA NA NA IA
01/14/04 NS NS NS NS NS NS NA NA NS
05/25/06 NS NS NS NS NS NS NS NA NS
01/24/07 IAD IAD IAD IAD IAD IAD IAD NA IAD
04/26/07
01/07/97 86 12 34 192 324 NA NA NA 144
11/18/99 56.7 1.4 23.4 177.7 259.2 NA NA NA 2.1
06/19/02 NS NS NS NS NS NS NA NA NS
01/14/04 37.5 0.98 25.2 150.8 214.48 17.2 NA NA 402
05/25/06 48.3 0.71 15.5 144.2 208.71 17.1 3.17 NA BQL
01/24/07 23.1 BQL 19.4 101.4 143.9 11.4 5.08 NA 172
04/26/07 22.4 BQL 15.2 61.1 98.7 10.6 5.56 NA 159
07/26/07 26.4 1.2 22.5 133.1 183.2 10.5 3.49 NA 182
10/25/07 94.1 BQL 21.3 143.1 258.5 30.8 2.16 NA 183
03/19/08 23.7 BQL 19 105.9 149 NA NA NA 202
09/23/08 22.1 0.68 36.3 579.3 638.38 8.23 4.35 NA 175
3/25-26/09 21.7 BQL 20.3 83.9 125.9 NA NA NA 132
12/20-21/11 22.8 <0.5 21.8 79.1 123.7 4.93 2.27 NA 116
06/06/12 24.3 <0.5 22.8 72.1 119.2 7.51 2.25 NA 77
12/19/12 83.8 <1.0 8.1 61.5 153.4 25.4 1.5 13.5 119
05/16/13 30.7 <1.0 18.4 58 107.1 7.7 1.6 19.6 148
12/10/13 36.6 <1.0 16.6 67.2 120.4 12.4 1.4 24.7 172
05/15/14 40.5 <1.0 21.8 50.7 113 8.3 1.5 21.9 148
12/15/14 42 <1.0 12.9 54.8 109.7 15.2 1.6 27.5 178
06/10/15 32.8 <1.0 16.2 46.2 95.2 9.7 1.3 24.3 163
12/09/15 21.5 <1.0 15.3 31.8 68.6 3.4 <1.0 16.8 166
06/29/16 20.2 <1.0 21.3 21.0 62.5 2.2 <1.0 14.5 127
12/12/16 62.9 <1.0 8.5 62.6 134 16.7 1.3 26.3 154
06/07/17 16.5 <1.0 10.9 24.3 51.7 2.4 <1.0 12.9 111
12/12/17 93.9 <1.0 6.1 49.2 149.2 28.2 1.5 22.1 108
05/15/18 33 <0.044 12 26.0 71 8.4 0.97J NA 130
11/27/18 15 <0.044 23 12.0 50 0.49 J 0.97 J NA 100
05/22/19 22 <0.044 22 16.0 60 3.5 J 0.69 J NA 210
11/26/19 17 <0.044 22 16.0 55 4.0 J 0.62 J NA 220
05/20/97 7290 570 4100 14190 26150 NA NA NA 1140
11/18/99 FP FP FP FP FP NA NA NA FP
06/19/02 FP FP FP FP FP FP NA NA FP
01/14/04 3510 71.4 1900 884 6365.4 4050 NA NA 2760
05/25/06 5470 173 1840 539.2 8022.2 1450 315 NA 38.6
01/24/07 IAD IAD IAD IAD IAD IAD IAD NA IAD
04/26/07
DRY
DRY
MW-3R
Sampling Ended
MW-5S
Sampling Ended
SHALLOW MONITORING WELLS
AMW-1
Sampling Ended
MW-1
Sampling Ended
TABLE 7: HISTORICAL GROUNDWATER ANALYTICAL RESULTS
MW-2S
MW-4
20200242.001A PAGE 1 OF 11
Volatile Organic Compounds by EPA Method 602
Sample ID Sample Date Benzene Toluene Ethylbenzene Xylenes Total BTEX MTBE IPE/DIPE Isopropylbenzene Naphthalene
SHALLOW MONITORING WELLS
TABLE 7: HISTORICAL GROUNDWATER ANALYTICAL RESULTS
06/06/12 314 7.15 48.2 59.9 429.25 192 84.8 NA 75.6
12/17/12 8620 52 267 383 9322 3480 796 53.5 561
05/13/13 7630 64.9 578 170 8442.9 2770 657 56.7 443
12/10/13 3860 39.5 255 134.2 4288.7 1410 330 56.5 250
05/12/14 2120 38.6 333 50.6 2542.2 552 124 58.8 299
12/14/14 6900 29.6 183 78.8 7191.4 3100 732 28.1 197
06/09/15 7600 60.4 320 <150 7980.4 2370 607 <50 235
12/07/15 1430 36.1 327 <60.0 1793.1 350 83.4 70.8 484
06/30/16 2500 34.1 198 120 2852.1 815 182 198 239
12/12/16 3110 23.2 68.9 <60 3202.1 1360 351 <20 140
06/07/17 3330 98.0 845 423.1 4696.1 645 123 121 756
12/12/17 1880 22.9 137 <60 2039.9 788 164 29.1 180
05/15/18 2000 47.0 370 79 2496 250 440 NA 440
11/27/18 610 30.0 250 110 1000 29 110 NA 810
05/22/19 1400 39.0 670 230 2339 400 56 NA 470
11/25/19 1300 35.0 380 66 1781 300 52 NA 480
06/01/20 820 33.0 330 80 1263 180 31 J NA 370
11/18/99 3.3 0.8 2.6 14.3 21 NA NA NA 22.6
06/19/02 BQL BQL BQL BQL BQL BQL NA NA BQL
01/14/04 BQL BQL BQL BQL BQL BQL NA NA BQL
05/25/06 BQL BQL BQL BQL BQL 0.73 BQL NA BQL
01/14/07 BQL BQL BQL BQL BQL BQL BQL NA BQL
04/26/07 BQL BQL BQL BQL BQL BQL BQL NA BQL
07/26/07 BQL BQL BQL BQL BQL BQL BQL NA BQL
10/25/07 BQL BQL BQL BQL BQL BQL BQL NA BQL
03/19/08 BQL BQL BQL BQL BQL NA NA NA BQL
09/23/08 BQL BQL BQL BQL BQL BQL BQL NA BQL
3/25-26/09 BQL BQL BQL BQL BQL NA NA NA BQL
12/20-21/11
01/07/97 28.2 1.2 3.5 64 96.9 NA NA NA 6
11/18/99 BQL 2 1.4 9.3 12.7 NA NA NA BQL
06/19/02 2.33 BQL 1.48 11.89 15.7 0.71 NA NA 106
01/14/04 2.28 BQL BQL 7.35 9.63 5.30 NA NA 19.1
05/25/06 37.1 0.5 0.92 68.3 106.82 23.5 1.97 NA BQL
01/24/07 8.65 BQL BQL 6.82 15.47 6.22 BQL NA 9.92
04/26/07 3.25 BQL BQL 5.46 8.71 239 21.5 NA 1.67
07/26/07 40.5 BQL BQL 49.8 90.3 15.5 0.61 NA 72.40
10/25/07 22 BQL BQL 12.1 34.1 22 1.17 NA 20
03/19/08 3.49 BQL BQL 1.74 5.23 NA NA NA 3.50
09/23/08 BQL 1.48 BQL BQL 1.48 4.46 BQL NA 8.14
3/25-26/09 1.39 BQL BQL 1.24 2.63 NA NA NA BQL
12/20-21/11 23.2 <0.5 2.42 2.5 28.1 18.2 6.86 NA 8.25
06/06/12 8.61 <0.5 1.25 1.85 11.71 9.03 1.95 NA 1.15
12/19/12 32.6 <1.0 2.9 4 39.5 26.9 3.7 44.6 15.9
05/16/13 30 <1.0 2.8 3 35.8 25.8 3.9 28.3 14.3
12/11/13 37.9 <1.0 2.1 6.3 46.3 34.8 3.6 44.6 14.7
05/15/14 39.9 <1.0 1.6 8.4 49.9 39.7 3.7 45.2 14.5
12/14/14 40.7 <1.0 1.9 4.0 46.6 30.1 4.1 44.5 12.6
06/09/15 20.3 <1.0 1 2.4 23.7 16.4 1.9 22.7 6.5
12/09/15 28.1 <1.0 1 5.5 34.6 32.1 2.6 35.7 15.7
06/27/16 19.6 <1.0 <1.0 5.7 25.3 24.6 1.6 25.8 7.8
12/12/16 38.9 <1.0 11.8 20.1 70.8 56.6 2.5 42.4 19.5
06/07/17 21.2 <1.0 <1.0 3.9 25.1 28.5 1.4 38.1 7.3
12/12/17 22.7 <1.0 1.7 4.9 29.3 35.9 <1.0 42.3 8.9
05/15/18 9.4 <0.044 0.61J 1.4J 9.4 14 0.74J NA 2.6J
11/28/18 5.7 <0.044 1.1 1.2 J 6.8 6.0 0.42 J NA <0.19
05/22/19 3.6 <0.044 0.69 J <0.15 3.6 3.8 J <0.050 NA 2.0 J
11/26/19 2.2 <0.044 0.69 J 0.71 J 3.6 1.8 J <0.050 NA 2.0 J
Sampling Ended
AW-6
MW-5SR
MW-6
20200242.001A PAGE 2 OF 11
Volatile Organic Compounds by EPA Method 602
Sample ID Sample Date Benzene Toluene Ethylbenzene Xylenes Total BTEX MTBE IPE/DIPE Isopropylbenzene Naphthalene
SHALLOW MONITORING WELLS
TABLE 7: HISTORICAL GROUNDWATER ANALYTICAL RESULTS
11/18/99 BQL BQL BQL BQL BQL NA NA NA BQL
06/19/02 BQL BQL BQL BQL BQL 142 NA NA BQL
01/14/04 1.68 3.7 1.24 5.64 12.26 167 NA NA BQL
05/25/06 BQL BQL BQL BQL BQL 160 14 NA BQL
01/24/07 BQL BQL BQL BQL BQL 205 5.48 NA BQL
04/26/07 BQL BQL BQL BQL BQL 239 21.5 NA BQL
07/26/07 BQL BQL BQL BQL BQL 182 23.9 NA BQL
10/25/07 1.38 BQL BQL 2.06 3.44 201 41.3 NA 1.44
03/19/08 0.5 BQL BQL 0.6 1.1 NA NA NA BQL
09/23/08 0.65 BQL BQL 0.6 1.3 128 NA NA BQL
03/25-26/09 BQL BQL BQL BQL BQL NA NA NA 1.8
12/20-21/11
01/07/97 BDL BDL BDL 1.6 1.6 NA NA NA BDL
11/18/99 BQL BQL BQL BQL BQL NA NA NA BQL
06/19/02 BQL BQL BQL BQL BQL BQL NA NA 1.29
01/14/04 BQL BQL BQL BQL BQL BQL NA NA BQL
05/25/06 BQL BQL BQL BQL BQL BQL BQL NA BQL
01/24/07 BQL BQL BQL BQL BQL BQL BQL NA BQL
04/26/07 BQL BQL BQL BQL BQL BQL BQL NA BQL
07/26/07 BQL 0.53 BQL BQL 0.53 BQL BQL NA BQL
10/25/07 BQL BQL 0.67 1.29 1.96 BQL BQL NA 1.76
03/19/08 BQL BQL BQL BQL BQL NA NA NA BQL
09/23/08 BQL BQL 2.2 1.39 3.6 BQL BQL NA BQL
03/25-26/09 BQL BQL 0.71 2.01 2.72 NA NA NA BQL
12/20-21/11 <0.5 <0.5 <0.5 <1.0 <2.5 <0.5 <0.5 NA <0.5
06/06/12 <0.5 <0.5 <0.5 <1.0 <2.5 <0.5 <0.5 NA 1.71
12/19/12 <1.0 <1.0 <1.0 <1.0 <4.0 <1.0 <1.0 <1.0 <2.0
05/16/13 <1.0 <1.0 <1.0 <3.0 <6.0 <1.0 <1.0 <1.0 <2.0
12/11/13 <1.0 <1.0 <1.0 <3.0 <6.0 <1.0 <1.0 <1.0 <2.0
05/13/14 <1.0 <1.0 <1.0 <3.0 <6.0 <1.0 <1.0 <1.0 <2.0
12/14/14 <1.0 <1.0 <1.0 <3.0 <6.0 <1.0 <1.0 <1.0 <2.0
06/09/15 <1.0 <1.0 <1.0 <3.0 <6.0 <1.0 <1.0 <1.0 <2.0
12/07/15 <1.0 <1.0 <1.0 <3.0 <6.0 <1.0 <1.0 <1.0 <2.0
06/27/16 <1.0 <1.0 <1.0 <3.0 <6.0 <1.0 <1.0 <1.0 <2.0
12/12/16 <1.0 <1.0 <1.0 <3.0 <6.0 <1.0 <1.0 <1.0 <2.0
06/07/17 <1.0 <1.0 <1.0 <3.0 <6.0 <1.0 <1.0 <1.0 <2.0
12/12/17
01/07/97 25.4 1 1.7 88 116.1 NA NA NA 10.3
11/18/99 6 0.6 1.7 33.9 42 NA NA NA 4.5
06/19/02 24.6 2.32 2.32 104.7 133.9 4.03 NA NA 20.8
01/14/04 BQL BQL BQL BQL BQL BQL NA NA BQL
05/25/06 BQL BQL BQL BQL BQL BQL BQL NA BQL
01/24/07 BQL BQL BQL BQL BQL BQL BQL NA BQL
04/26/07 BQL BQL BQL BQL BQL BQL BQL NA BQL
07/26/07 BQL BQL BQL BQL BQL BQL BQL NA BQL
10/25/07 BQL BQL BQL BQL BQL BQL BQL NA BQL
03/19/08 BQL BQL BQL BQL BQL NA NA NA BQL
09/23/08 BQL BQL BQL BQL BQL BQL BQL NA BQL
03/25-26/09 BQL BQL BQL BQL BQL NA NA NA BQL
12/20-21/11 <0.5 <0.5 <0.5 <1.0 <2.5 <0.5 <0.5 NA <0.5
06/06/12 <0.5 <0.5 <0.5 <1.0 <2.5 <0.5 <0.5 NA <0.5
12/19/12 <1.0 <1.0 <1.0 <1.0 <4.0 <1.0 <1.0 <1.0 <2.0
05/15/13 <1.0 <1.0 <1.0 <3.0 <6.0 <1.0 <1.0 <1.0 <2.0
12/10/13 <1.0 <1.0 <1.0 <3.0 <6.0 <1.0 <1.0 <1.0 <2.0
05/13/14 <1.0 <1.0 <1.0 <3.0 <6.0 <1.0 <1.0 <1.0 <2.0
12/15/14 <1.0 <1.0 <1.0 <3.0 <6.0 <1.0 <1.0 <1.0 <2.0
06/09/15 <1.0 <1.0 <1.0 <3.0 <6.0 <1.0 <1.0 <1.0 <2.0
12/7/15 <1.0 <1.0 <1.0 <3.0 <6.0 <1.0 <1.0 <1.0 <2.0
6/28/16 <1.0 <1.0 <1.0 <3.0 <6.0 <1.0 <1.0 <1.0 <2.0
12/12/16 <1.0 <1.0 <1.0 <3.0 <6.0 <1.0 <1.0 <1.0 <2.0
6/7/17 <1.0 <1.0 <1.0 <3.0 <6.0 <1.0 <1.0 <1.0 <2.0
12/12/17
Sampling Ended
Sampling Ended
MW-7
MW-8
AW-7
Sampling Ended
20200242.001A PAGE 3 OF 11
Volatile Organic Compounds by EPA Method 602
Sample ID Sample Date Benzene Toluene Ethylbenzene Xylenes Total BTEX MTBE IPE/DIPE Isopropylbenzene Naphthalene
SHALLOW MONITORING WELLS
TABLE 7: HISTORICAL GROUNDWATER ANALYTICAL RESULTS
01/07/97 0.9 2.4 15 68 86.3 NA NA NA 9.2
11/18/99 2 1.5 19.4 72.4 95 NA NA NA 40.8
06/19/02 BQL BQL BQL BQL BQL BQL NA NA BQL
01/14/04 BQL BQL 1.94 3.22 5.16 BQL NA NA 13
05/25/06 IA IA IA IA IA IA IA NA IA
01/24/07 BQL BQL BQL BQL BQL BQL BQL NA 2.81
04/26/07 BQL BQL BQL BQL BQL BQL BQL NA 3.62
07/26/07 BQL BQL 3.96 3.47 7.43 1.16 BQL NA 14
10/25/07 BQL BQL BQL BQL BQL 0.66 BQL NA BQL
03/19/08 BQL BQL BQL BQL BQL NA NA NA BQL
09/23/08 BQL BQL 1.46 11.85 13.31 BQL BQL NA 8.3
03/25-26/09 BQL BQL 2.11 2.13 4.24 NA NA NA 2.2
12/20-21/11 <0.5 <0.5 <0.5 <1.0 <2.5 <0.5 <0.5 NA <0.5
06/06/12 <0.5 <0.5 <0.5 <1.0 <2.5 <0.5 <0.5 NA <0.5
12/19/12 <1.0 <1.0 <1.0 <1.0 <4.0 <1.0 <1.0 <1.0 <2.0
05/14/13 <1.0 <1.0 <1.0 <3.0 <6.0 <1.0 <1.0 <1.0 <2.0
12/09/13 <1.0 <1.0 <1.0 <3.0 <6.0 <1.0 <1.0 <1.0 <2.0
05/14/14 <1.0 <1.0 <1.0 <3.0 <6.0 <1.0 <1.0 <1.0 <2.0
12/14/14 <1.0 <1.0 <1.0 <3.0 <6.0 <1.0 <1.0 <1.0 <2.0
06/09/15 <1.0 <1.0 <1.0 <3.0 <6.0 <1.0 <1.0 <1.0 <2.0
12/08/15 <1.0 <1.0 <1.0 <3.0 <6.0 <1.0 <1.0 <1.0 <2.0
06/30/16 <1.0 <1.0 <1.0 <3.0 <6.0 <1.0 <1.0 <1.0 <2.0
12/13/16 NS NS NS NS NS NS NS NS NS
06/07/17 <1.0 <1.0 <1.0 <3.0 <6.0 <1.0 <1.0 <1.0 <2.0
12/12/17
01/07/97 BDL BDL BDL BDL BDL NA NA NA BDL
11/18/99 1.4 BQL 1.6 5.4 8.4 NA NA NA 3.8
06/19/02 BQL BQL BQL BQL BQL BQL NA NA 2.96
01/14/04 BQL BQL BQL BQL BQL BQL NA NA BQL
05/25/06 BQL BQL BQL BQL BQL BQL BQL NA BQL
01/24/07 BQL BQL BQL BQL BQL BQL BQL NA BQL
04/26/07 BQL BQL BQL BQL BQL BQL BQL NA BQL
07/26/07 BQL BQL BQL BQL BQL BQL BQL NA BQL
10/25/07 BQL BQL BQL BQL BQL BQL BQL NA BQL
03/19/08 BQL BQL BQL BQL BQL NA NA NA BQL
09/23/08 BQL BQL BQL BQL BQL BQL BQL NA BQL
03/25-26/09 BQL BQL BQL BQL BQL NA NA NA BQL
12/20-21/11 <0.5 <0.5 <0.5 <1.0 <2.5 <0.5 <0.5 NA <0.5
06/06/12 <0.5 <0.5 <0.5 <1.0 <2.5 <0.5 <0.5 NA <0.5
12/19/12 3.2 <1.0 <1.0 <1.0 <4.0 <1.0 <1.0 <1.0 <2.0
05/14/13 <1.0 <1.0 <1.0 <3.0 <6.0 <1.0 <1.0 <1.0 <2.0
12/09/13 <1.0 <1.0 <1.0 <3.0 <6.0 <1.0 <1.0 <1.0 <2.0
05/14/14 <1.0 <1.0 <1.0 <3.0 <6.0 <1.0 <1.0 <1.0 <2.0
12/14/14 <1.0 <1.0 <1.0 <3.0 <6.0 <1.0 <1.0 <1.0 <2.0
06/10/15 <1.0 <1.0 <1.0 <3.0 <6.0 <1.0 <1.0 <1.0 <2.0
12/08/15 <1.0 <1.0 <1.0 <3.0 <6.0 <1.0 <1.0 <1.0 <2.0
06/28/16 <1.0 <1.0 <1.0 <3.0 <6.0 <1.0 <1.0 <1.0 <2.0
12/13/16 <1.0 <1.0 <1.0 <3.0 <6.0 <1.0 <1.0 <1.0 <2.0
06/08/17 <1.0 <1.0 <1.0 <3.0 <6.0 <1.0 <1.0 <1.0 <2.0
12/12/17
01/07/97 120 BDL BDL 41 161 NA NA NA 8
11/18/99 9.4 BQL BQL 2 11.4 NA NA NA 2.6
06/19/02 4.59 BQL BQL 0.45est 5.04 141 NA NA 2.81
01/14/04 2.78 BQL BQL BQL 2.78 151 NA NA BQL
05/25/06 0.48 est BQL BQL BQL 0.48 80.3 4.39 NA BQL
01/24/07 36.3 BQL 33.9 1.69 71.89 56.4 221 NA 3.71
04/26/07 BQL BQL BQL BQL BQL 26.6 BQL NA 9.76
07/26/07 BQL BQL BQL BQL BQL 49.1 7.06 NA BQL
10/25/07 BQL BQL BQL BQL BQL 42.3 3.05 NA BQL
03/19/08 BQL BQL BQL BQL BQL NA NA NA BQL
09/23/08 BQL BQL BQL BQL BQL 9.5 1.06 NA BQL
03/25-26/09 BQL BQL BQL BQL BQL NA NA NA BQL
12/20-21/11 <0.5 <0.5 <0.5 <1.0 <2.5 <0.5 <0.5 NA <0.5
06/06/12 <0.5 <0.5 <0.5 <1.0 <2.5 20 2.54 NA <0.5
12/18/12 <1.0 <1.0 <1.0 <1.0 <4.0 7.3 <1.0 <1.0 <2.0
05/13/13 <1.0 <1.0 <1.0 <3.0 <6.0 7.5 <1.0 <1.0 <2.0
12/10/13 <1.0 <1.0 <1.0 <3.0 <6.0 4.2 <1.0 <1.0 <2.0
05/12/14 <1.0 <1.0 <1.0 <3.0 <6.0 4.6 <1.0 <1.0 <2.0
12/15/14 <1.0 <1.0 <1.0 <3.0 <6.0 2.8 <1.0 <1.0 <2.0
06/09/15 <1.0 <1.0 <1.0 <3.0 <6.0 2.2 <1.0 <1.0 <2.0
12/07/15 <1.0 <1.0 <1.0 <3.0 <6.0 <1.0 <1.0 <1.0 <2.0
06/29/16 <1.0 <1.0 <1.0 <3.0 <6.0 <1.0 <1.0 <1.0 <2.0
12/13/16 <1.0 <1.0 <1.0 <3.0 <6.0 <1.0 <1.0 <1.0 <2.0
06/08/17 <1.0 <1.0 <1.0 <3.0 <6.0 <1.0 <1.0 <1.0 <2.0
12/12/17
NA
Sampling Ended
Sampling Ended
MW-9
MW-10
MW-11S
20200242.001A PAGE 4 OF 11
Volatile Organic Compounds by EPA Method 602
Sample ID Sample Date Benzene Toluene Ethylbenzene Xylenes Total BTEX MTBE IPE/DIPE Isopropylbenzene Naphthalene
SHALLOW MONITORING WELLS
TABLE 7: HISTORICAL GROUNDWATER ANALYTICAL RESULTS
01/07/97 5.2 1.5 BDL 2.3 9 NA NA NA BDL
11/18/99 BQL BQL BQL BQL BQL NA NA NA BQL
06/19/02 BQL BQL BQL BQL BQL BQL NA NA BQL
01/14/04 BQL BQL BQL BQL BQL BQL NA NA BQL
05/25/06
05/20/97 8800 2300 850 7300 19250 NA NA NA 450
11/18/99 4100 699 362 4570 9731 NA NA NA 394
06/19/02 FP FP FP FP FP FP NA NA FP
01/14/04 3510 119 174 2395 6198 9330 NA NA 724
05/25/06 3560 71.3 129 1173.6 4933.9 14500 1400 NA 53.9
01/24/07 3750 25.5 68.9 639.4 4483.8 12500 1170 NA 362
04/26/07 3800 95 79.8 913 4888 12308 1235 NA 205
07/26/07 3650 28.9 71 623.5 4373.4 9650 1090 NA 235
10/25/07 NS NS NS NS NS NS NS NA NS
03/19/08 30.6 0.96 3.69 12.08 47.33 NA NA NA 8.05
09/23/08 143 0.83 49.5 1.52 194.85 243 60.3 NA 44.4
03/25-26/09 55.3 BQL 0.58 7.09 62.97 NA NA NA 4.97
12/20-21/11 41.0 1.29 1.27 5.82 49.38 117 22.5 NA 3.38
06/06/12 38.5 <0.5 <0.5 <1.0 38.50 78.7 20.3 NA <0.5
12/19/12 50.1 <1.0 1.4 2.6 54.1 100 23.9 2.3 6.8
05/15/13 5.6 <1.0 <1.0 <3.0 5.6 14.4 2.9 <1.0 <2.0
12/10/13 7.6 <1.0 <1.0 <3.0 7.6 14.3 3.0 <1.0 <2.0
05/15/14 4.6 <1.0 <1.0 <3.0 4.6 11.1 12.5 <1.0 <2.0
12/15/14 7.3 <1.0 <1.0 <3.0 7.3 9.1 1.5 <1.0 <2.0
06/09/15 7.5 1.3 <1.0 <3.0 8.8 16.7 5.1 <1.0 <2.0
12/08/15 <1.0 <1.0 <1.0 <3.0 <1.0 <1.0 <1.0 <1.0 <2.0
06/27/16 1.9 <1.0 <1.0 <3.0 1.9 19.3 6.0 <1.0 <2.0
12/13/16 <1.0 <1.0 <1.0 <3.0 <1.0 <1.0 <1.0 <1.0 <2.0
06/08/17 <1.0 <1.0 <1.0 <3.0 <1.0 <1.0 <1.0 <1.0 <2.0
12/12/17
05/20/97 BDL 1.3 BDL BDL 1.3 NA NA NA BDL
11/18/99 BQL BQL BQL BQL BQL NA NA NA 1.5
06/19/02 NS NS NS NS NS NS NA NA NS
01/14/04 BQL BQL BQL BQL BQL 6.15 NA NA BQL
05/25/06 BQL BQL BQL BQL BQL 3.62 BQL NA BQL
01/24/07 BQL BQL BQL BQL BQL 17.5 BQL NA BQL
04/26/07 BQL BQL BQL BQL BQL 8.07 BQL NA BQL
07/26/07 BQL BQL BQL BQL BQL 6.67 BQL NA 0.57
10/25/07 BQL BQL BQL BQL BQL 11 BQL NA BQL
03/19/08 BQL BQL BQL BQL BQL NA NA NA BQL
09/23/08 BQL BQL BQL BQL BQL 2.34 BQL NA BQL
03/25-26/09 BQL BQL BQL BQL BQL NA NA NA BQL
12/20-21/11 <0.5 <0.5 <0.5 <1.0 <2.5 <0.5 <0.5 NA <0.5
06/06/12 <0.5 <0.5 <0.5 <1.0 <2.5 <0.5 <0.5 NA <0.5
12/19/12 6.7 <1.0 <1.0 <1.0 6.7 <1.0 <1.0 <1.0 <1.0
05/16/13 <1.0 <1.0 <1.0 <3.0 <6.0 <1.0 <1.0 <1.0 <2.0
12/10/13 <1.0 <1.0 <1.0 <3.0 <6.0 <1.0 <1.0 <1.0 <2.0
05/15/14 <1.0 <1.0 <1.0 <3.0 <6.0 <1.0 <1.0 <1.0 <2.0
12/15/14 <1.0 <1.0 <1.0 <3.0 <6.0 <1.0 <1.0 <1.0 <2.0
06/09/15 <1.0 <1.0 <1.0 <3.0 <6.0 <1.0 <1.0 <1.0 <2.0
12/07/15 <1.0 <1.0 <1.0 <3.0 <6.0 <1.0 <1.0 <1.0 <2.0
06/27/16 <1.0 <1.0 <1.0 <3.0 <6.0 <1.0 <1.0 <1.0 <2.0
12/12/16 2.7 <1.0 14.0 5.6 22.3 <1.0 <1.0 <1.0 4.3
06/08/17 <1.0 <1.0 <1.0 <3.0 <6.0 <1.0 <1.0 <1.0 <2.0
12/12/17
01/07/97 332.5 8 56.5 60 457 NA NA NA 220
11/18/99 33.2 24.6 207 BQL 264.8 NA NA NA 131
06/19/02 4.71 BQL 4.46 BQL 9.17 72.6 NA NA 4.35
01/14/04 11.1 1 38.6 BQL 51 33.5 NA NA 39.2
05/25/06 Sampling Ended
MW-12S
Sampling Ended
MW-15
Sampling Ended
Sampling Ended
MW-13
MW-14
20200242.001A PAGE 5 OF 11
Volatile Organic Compounds by EPA Method 602
Sample ID Sample Date Benzene Toluene Ethylbenzene Xylenes Total BTEX MTBE IPE/DIPE Isopropylbenzene Naphthalene
SHALLOW MONITORING WELLS
TABLE 7: HISTORICAL GROUNDWATER ANALYTICAL RESULTS
05/20/97 195 1110 380 1825 3510 NA NA NA 21.2
11/18/99 142 320 479 511 1452 NA NA NA 41.7
06/19/02 NS NS NS NS NS NS NA NA NS
01/14/04 57.2 19 167 106.8 350 725 NA NA 5.06
05/25/06 NS NS NS NS NS NS NS NA NS
01/24/07 1.25 1.29 4.81 4.86 12.21 BQL BQL NA 0.82
04/26/07 BQL BQL BQL BQL BQL BQL BQL NA BQL
07/26/07 2.33 BQL BQL BQL 2.33 229 15 NA BQL
10/25/07 NS NS NS NS NS NS NS NA NS
03/19/08 BQL 0.61 0.34est BQL 0.95 NA NA NA BQL
09/23/08 BQL BQL BQL BQL BQL BQL BQL NA BQL
03/25-26/09 BQL BQL BQL BQL BQL NA NA NA BQL
12/20-21/11 <0.5 <0.5 <0.5 <1.0 <2.5 <0.5 <0.5 NA <0.5
06/06/12 <0.5 <0.5 <0.5 <1.0 <2.5 <0.5 <0.5 NA <0.5
12/19/12 <1.0 <1.0 <1.0 <1.0 <4.0 63 2.6 <1.0 <2.0
05/16/13 <1.0 <1.0 <1.0 <3.0 <6.0 4.1 <1.0 <1.0 <2.0
12/10/13 <1.0 <1.0 <1.0 <3.0 <6.0 <1.0 <1.0 <1.0 <2.0
05/15/14 <1.0 <1.0 <1.0 <3.0 <6.0 <1.0 <1.0 <1.0 <2.0
12/15/14 <1.0 <1.0 <1.0 <3.0 <6.0 45 2.9 <1.0 <2.0
06/09/15 <1.0 <1.0 <1.0 <3.0 <6.0 5.1 <1.0 <1.0 <2.0
12/07/15 <1.0 <1.0 <1.0 <3.0 <6.0 <1.0 <1.0 <1.0 <2.0
06/27/16 <1.0 <1.0 <1.0 <3.0 <6.0 <1.0 <1.0 <1.0 <2.0
12/12/16 <1.0 <1.0 7.2 3.1 10.3 5 <1.0 <1.0 9.1
06/07/17 <1.0 <1.0 <1.0 <3.0 <6.0 <1.0 <1.0 <1.0 <2.0
12/12/17
01/07/97 0.7 BDL 1.1 3.8 5.6 NA NA NA BDL
11/18/99 BQL BQL 941 1555 2496 NA NA NA 362
06/19/02 FP FP FP FP FP FP NA NA FP
01/14/04 51.8 298 3710 13990 18049.8 BQL NA NA 3250
05/25/06 711 358 4540 9350 14959 986 164 NA 41.8
01/24/07 42.6 39.9 1150 3063 4295.5 31.3 2.95 NA 460
04/26/07 219 103 2147 3927 6396 499 59.9 NA 531
07/26/07 398 205 4110 7000 11713 757 86.5 NA 598
10/25/07 947 142 5120 9920 16129 2920 309 NA 1020
03/19/08 459 379 5550 10680 17068 NA NA NA 815
09/23/08 390 120 4540 9240 14290 964 108 NA 925
03/25-26/09 320 84.2 2390 4500 7294.2 NA NA NA 772
12/20-21/11 147 17.4 1500 1603.77 3268.17 272 36.8 NA 466
06/06/12 159 37.4 2660 2574.99 5431.39 268 57.6 NA 369
12/18/12 930 54.3 2630 1911.1 5525.4 1510 248 93.1 596
05/15/13 1820 55.7 2330 1840 6045.7 2050 346 87.3 576
12/09/13 1470 51.2 2370 1791.2 5682.4 2070 354 102 563
05/14/14 1120 88.7 1590 1180 3978.7 1540 259 66.8 463
12/15/14 990 49.1 2430 1460 4929.1 1910 331 105 664
06/09/15 1370 35.9 2100 1150 4655.9 1490 280 92 562
12/08/15 5370 61.6 2660 1410 9501.6 3470 830 110 713
06/30/16 2070 29.6 1730 772 4601.6 1600 350 69.7 447
12/12/16 3720 31.3 2420 935 7106.3 2370 580 85.8 651
06/07/17 6370 77.1 4060 1560 12067.1 3880 806 159 1130
12/12/17 2570 <20.0 2450 523 5543 1850 405 96.7 598
05/15/18 4700 48 4000 1300 10048 2700 600 NA 830
11/28/18 4900 37 2900 830 8667 3100 580 NA 600
05/22/19 880 11 1200 350 2441 750 120 NA 360
11/26/19 1900 <4.4 1800 450 4150 2200 330 J NA 450 J
06/02/20 4100 39 J 2300 570 7009 3500 630 NA 420 J
05/20/97 3100 542.0 588 4100 8330 NA NA NA 200
11/18/99 2500 367 728 3850 7445 NA NA NA 291
06/19/02 NA NA NA NA NA NA NA NA NA
01/14/04 2210 1940 1530 4200 9880 241 NA NA 515
05/25/06 104 5.75 8.31 76.2 194.26 29.9 10.7 NA BQL
01/24/07 380 30.8 53.5 196.2 660.5 15.6 20.3 NA 101
04/26/07 136 20.2 44.6 96.6 297.4 14 BQL NA 289
07/26/07 499 56.2 155 263.8 974 31.9 224 NA 137
10/25/07 578 53.8 144 285 1060.8 47.4 14.8 NA 234
03/19/08 535 379 147 69 1130 NA NA NA 184
09/23/08 484 31 224 38.9 777.9 32.2 BQL NA 191
03/25-26/09 449 53 140 182.2 824.2 NA NA NA 154
12/20-21/11 219 16.7 387 67.7 690.4 <0.5 20.4 NA 121
06/06/12 176 22.6 310 106 614.6 8.86 13.8 NA 180
12/19/12 183 13.6 273 48 517.8 5 <1.0 27.1 55.8
05/14/13 243 32.3 383 282 940.3 <2.0 <2.0 32.9 113
12/09/13 144 15 228 151.5 538.5 <2.5 <2.5 19.5 52.6
05/13/14 176 19.8 264 236.6 696.4 <2.0 <2.0 30.4 96.8
12/15/14 246 24.4 417 311.0 998.4 <2.5 <2.5 30.6 89.2
06/09/15 169 25.7 291 324 809.7 <4.0 <4.0 27.4 80.8
12/07/15 134 18.4 249 268 668.9 <2.0 <2.0 32.6 116.0
06/28/16 52.4 6.1 115 65 238.1 <1.0 <1.0 19.2 115.0
12/12/16 51.5 5.9 137 25 219.0 <1.0 <1.0 20.8 27.8
06/08/17 48.3 7.3 77.9 74.2 207.7 <1.0 <1.0 24.9 55.6
12/12/17 27.3 3.0 45.6 2.1 78.0 <1.0 <1.0 17.4 12.9
05/15/18 35 5.0 46.0 50.0 136.0 <0.042 <0.050 NA 41.0
11/27/18 20 2.6 34.0 6.0 62.6 <0.042 <0.050 NA 17.0
05/22/19 11 1.0 25.0 <0.15 37.0 <0.042 <0.050 NA 9.2
11/26/19 26 2.2 60.0 2.1 J 90.3 <0.042 0.30 J NA 22.0
Sampling Ended
MW-16
MW-17
MW-19
20200242.001A PAGE 6 OF 11
Volatile Organic Compounds by EPA Method 602
Sample ID Sample Date Benzene Toluene Ethylbenzene Xylenes Total BTEX MTBE IPE/DIPE Isopropylbenzene Naphthalene
SHALLOW MONITORING WELLS
TABLE 7: HISTORICAL GROUNDWATER ANALYTICAL RESULTS
05/20/97 3140 4240 3380 10940 21700 NA NA NA 280
11/18/99 2330 7800 3390 9780 23300 NA NA NA 1100
06/19/02 FP FP FP FP FP FP NA NA FP
01/14/04 1856 3150 3130 9310 17446 BQL NA NA 1530
05/25/06 1160 5920 3250 10600 20930 BQL 214 NA 3.85
01/24/07 648 923 4590 11340 17501 99.9 27.3 NA 278
04/26/07 343 603 2682 6640 10268 BQL BQL NA 289
07/26/07 445 56.2 2610 6110 9221.2 BQL BQL NA 254
10/25/07 484 1180 4910 10970 17544 220 41.2 NA 294
03/19/08 568 1320 3810 8750 14448 NA NA NA 402
09/23/08 428 883 4560 10420 16291 BQL BQL NA 500
03/25-26/09 418 1020 3040 7060 11538 NA NA NA 649
12/20-21/11 444 301 2960 5160 8865 <0.5 189 NA 440
06/06/12 334 260 3220 5250 9064 123 89.2 NA 134
12/19/12 265 166 2420 3640 6491 <10 <10 62.9 264
05/14/13 274 173 2100 3460 6007 <1.0 <1.0 80.4 151
12/09/13 291 112 1930 2870 5203 <20 <20 53.6 192
05/13/14 132 52 1080 1705 2969 <20 <20 40.3 120
12/15/14 161 61.3 1710 2482 4414.3 <10 <10 53.8 184
06/09/15 144 41.1 1170 1523 2878.1 <12.5 <12.5 38.9 124
12/07/15 59.8 35.5 1180 1599 2874.3 <12.5 <12.5 46.1 134
06/28/16 149 28.3 1190 1314 2681.3 <10.0 <10.0 38.6 115
12/12/16 162 31.7 1430 1643 3266.7 <10.0 <10.0 41.0 156
06/08/17 329 42.2 2780 2510 5661.2 <20.0 <20.0 92.7 318
12/12/17 160 26 1440 1308 2934 <10.0 <10.0 41.4 154
05/15/18 210 32 2700 2100 5042 <0.42 <0.50 NA 200
11/27/18 240 25 2200 1700 4165 <0.42 <0.50 NA 170
05/22/19 280 18 1600 1200 3098 <0.042 <0.050 NA 250
11/26/19 370 19 2100 1500 3989 <0.42 <0.50 NA 170
05/20/97 2900 16000 3200 10000 32100 NA NA NA 130
11/18/99 FP FP FP FP FP NA NA NA FP
06/19/02 FP FP FP FP FP FP NA NA FP
01/14/04 4270 3260 2760 9260 19550 BQL NA NA 2600
05/25/06 21100 27200 149000 512000 709300 BQL 3850 NA 6.86
01/24/07 4260 1290 4130 14840 24520 613 65.4 NA 589
04/26/07 2885 718 3102 8675 15380 BQL BQL NA 388
07/26/07 4780 1050 3280 9340 18450 BQL BQL NA 275
10/25/07 4840 1140 3570 9410 18960 128 36.7 NA 398
03/19/08 6080 1530 3660 10050 21320 NA NA NA 395
09/23/08 4490 1040 3890 10710 20130 BQL 406 NA 455
03/25-26/09 4130 1040 3400 9160 17730 NA NA NA 435
12/20-21/11 3290 433 2570 7220 13513 <0.5 72.6 NA 344
06/06/12 4130 646 3730 10100 18606 156 152 NA 203
12/17/12 3500 445 2480 7140 13565 <5.0 <5.0 55.0 244
05/14/13 3070 397 2320 6490 12277 <25 <25 59.7 249
12/09/13 2940 340 1910 5410 10600 <25 <25 50.9 215
05/13/14 3320 355 2110 6250 12035 <25 <25 63 255
12/15/14 3680 350 2200 6340 12570 <25 <25 61 254
06/10/15 2700 247 1720 4760 9427 <25 <25 47.5 201
12/08/15 3650 350 2180 6460 12640 <25 <25 66.2 269
06/28/16 3320 294 2210 6110 11934 <25 <25 62.3 252
12/13/16 3810 311 2240 6260 12621 <25 <25 67.3 271
06/08/17 6790 492 4180 11050 22512 <40 <40 119 490
12/12/17 3490 252 2260 6000 12002 <20.0 <20.0 63 262
05/15/18 4900 280 3400 8800 17380 <0.42 4.0J NA 270
11/27/18 3700 210 2800 7400 14110 <0.42 <0.50 NA 270
05/21/19 3700 190 2700 6700 13290 <0.42 3.4 J NA 270
11/25/19 2600 140 2300 5600 10640 <4.2 <5.0 NA 210 J
02/01/20 3600 170 2500 6200 12470 <4.2 <5.0 NA 230 J
01/07/97 BDL BDL BDL BDL BDL NA NA NA 1.3
11/18/99 BQL BQL BQL BQL BQL NA NA NA BQL
06/19/02 NS NS NS NS NS NS NA NA NS
01/14/04 BQL BQL BQL BQL BQL BQL NA NA BQL
05/25/06 BQL BQL BQL BQL BQL BQL BQL NA BQL
01/24/07 BQL BQL BQL BQL BQL BQL BQL NA BQL
04/26/07 BQL BQL BQL BQL BQL BQL BQL NA BQL
07/26/07 BQL BQL BQL BQL BQL BQL BQL NA BQL
10/25/07 BQL BQL BQL BQL BQL BQL BQL NA BQL
03/19/08 BQL BQL BQL BQL BQL NA NA NA BQL
09/23/08 BQL BQL BQL BQL BQL BQL BQL NA BQL
03/25-26/09 BQL BQL BQL BQL BQL NA NA NA BQL
12/20-21/11 <0.5 <0.5 <0.5 <1.0 <2.5 <0.5 <0.5 NA <0.5
06/06/12 <0.5 <0.5 <0.5 <1.0 <2.5 <0.5 <0.5 NA <0.5
12/18/12 <1.0 <1.0 <1.0 <1.0 <4.0 <1.0 <1.0 <1.0 <2.0
05/14/13 <1.0 <1.0 <1.0 <3.0 <6.0 <1.0 <1.0 <1.0 <2.0
12/09/13 <1.0 <1.0 <1.0 <3.0 <6.0 <1.0 <1.0 <1.0 <2.0
05/13/14 <1.0 <1.0 <1.0 <3.0 <6.0 <1.0 <1.0 <1.0 <2.0
12/14/14 <1.0 <1.0 <1.0 <3.0 <6.0 <1.0 <1.0 <1.0 <2.0
06/09/15 <1.0 <1.0 <1.0 <3.0 <6.0 <1.0 <1.0 <1.0 <2.0
12/08/15 <1.0 <1.0 <1.0 <3.0 <6.0 <1.0 <1.0 <1.0 <2.0
06/28/16 <1.0 <1.0 <1.0 <3.0 <6.0 <1.0 <1.0 <1.0 <2.0
12/12/16 <1.0 <1.0 <1.0 <3.0 <6.0 <1.0 <1.0 <1.0 <2.0
06/07/17 <1.0 <1.0 <1.0 <3.0 <6.0 <1.0 <1.0 <1.0 <2.0
12/12/17 Sampling Ended
MW-21
MW-20
MW-22
20200242.001A PAGE 7 OF 11
Volatile Organic Compounds by EPA Method 602
Sample ID Sample Date Benzene Toluene Ethylbenzene Xylenes Total BTEX MTBE IPE/DIPE Isopropylbenzene Naphthalene
SHALLOW MONITORING WELLS
TABLE 7: HISTORICAL GROUNDWATER ANALYTICAL RESULTS
01/07/97 BDL BDL BDL BDL BDL NA NA NA BDL
11/18/99 BQL BQL BQL BQL BQL NA NA NA BQL
06/19/02 BQL BQL BQL 11.02 11.02 0.65 NA NA 4.59
01/14/04 BQL BQL BQL BQL BQL BQL NA NA BQL
05/25/06 NS NS NS NS NS NS NS NA NS
01/24/07 IA IA IA IA IA IA IA NA IA
04/26/07 BQL BQL BQL BQL BQL BQL BQL NA BQL
07/26/07 BQL BQL BQL BQL BQL BQL BQL NA BQL
10/25/07 BQL BQL BQL BQL BQL BQL BQL NA BQL
03/19/08 BQL BQL BQL BQL BQL NA NA NA BQL
09/23/08 BQL BQL BQL BQL BQL BQL BQL NA BQL
03/25-26/09 BQL BQL BQL BQL BQL NA NA NA BQL
12/20-21/11 <0.5 <0.5 <0.5 <1.0 <2.5 <0.5 <0.5 NA <0.5
06/06/12 <0.5 <0.5 <0.5 <1.0 <2.5 <0.5 <0.5 NA <0.5
12/19/12 <1.0 <1.0 <1.0 <1.0 <4.0 <1.0 <1.0 <1.0 <2.0
05/15/13 <1.0 <1.0 <1.0 <3.0 <6.0 <1.0 <1.0 <1.0 <2.0
12/09/13 <1.0 <1.0 <1.0 <3.0 <6.0 <1.0 <1.0 <1.0 <2.0
05/13/14 <1.0 <1.0 <1.0 <3.0 <6.0 <1.0 <1.0 <1.0 <2.0
12/15/14 <1.0 <1.0 <1.0 <3.0 <6.0 <1.0 <1.0 <1.0 <2.0
06/10/15 NS NS NS NS NS NS NS NS NS
12/09/15 <1.0 <1.0 <1.0 <3.0 <6.0 <1.0 <1.0 <1.0 <2.0
06/28/16 <1.0 <1.0 <1.0 <3.0 <6.0 <1.0 <1.0 <1.0 <2.0
12/12/16 <1.0 <1.0 4.4 4.2 8.6 <1.0 <1.0 <1.0 <2.0
06/08/17 <1.0 <1.0 4.4 4.2 8.6 <1.0 <1.0 <1.0 <2.0
12/12/17
01/07/97 75 215 2100 2525 4915 NA NA NA 380
11/18/99 173 375 729 1464 2741 NA NA NA 849
06/19/02 NS NS NS NS NS NS NA NA NS
01/14/04 BQL BQL 54.4 59.59 113.99 2.23 NA NA 93.5
05/25/06 3.52 100 1020 1116 2239.52 BQL 14.8 NA 57.2
01/24/07 2.87 3.43 263 159.09 428.39 1.61 BQL NA 106
04/26/07 BQL BQL 52.8 40 92.8 BQL BQL NA 41.2
07/26/07 BQL BQL 234 139.38 373.38 BQL BQL NA 10
10/25/07 2.76 4.10 573 278.79 858.65 47.6 1.32 NA 155
03/19/08 BQL BQL 477 242 719 NA NA NA 76.4
09/23/08 BQL BQL 431 221.84 652.84 BQL BQL NA 84
03/25-26/09 1.41 3.87 304 204.8 514.08 NA NA NA 104
12/20-21/11 2.65 1.89 537 326.03 867.57 <0.5 7.83 NA 117
06/06/12 1.05 4.66 1240 728.1 1973.81 44.1 12.8 NA 161
12/18/12 <5.0 <5.0 752 449 1201 <5.0 <5.0 48 187
05/14/13 <5.0 <5.0 454 284 738 <5.0 <5.0 35.9 124
12/09/13 <4.0 <4.0 284 181 465 <4.0 <4.0 25.2 77
05/14/14 <2.0 <2.0 226 139 365 <2.0 <2.0 19.5 57.9
12/14/14 <2.0 <2.0 799 473 1272 <2.0 <2.0 49.8 172.0
06/09/15 <5.0 <5.0 678 426 1104 <5.0 <5.0 43.3 162
12/08/15 <2.5 <2.5 326 225 551 <2.5 <2.5 28.9 90
06/28/16 <2.0 <2.0 308 192 500 <2.0 <2.0 24.0 55.1
12/13/16 <5.0 <5.0 655 386 1041 <5.0 <5.0 30.2 117.0
06/08/17 <4.0 <4.0 428 271 699 <4.0 <4.0 23.8 84.4
12/12/17
01/07/97 BDL BDL BDL BDL BDL NA NA NA BDL
11/18/99 BQL BQL BQL BQL BQL NA NA NA BQL
06/19/02 BQL BQL BQL BQL BQL BQL NA NA BQL
01/14/04 BQL BQL BQL BQL BQL BQL NA NA BQL
05/25/06
01/07/97 BDL 0.6 BDL BDL 0.6 NA NA NA 1
11/18/99 BQL BQL BQL BQL BQL NA NA NA BQL
06/19/02 NS NS NS NS BQL NS NA NA NS
01/14/04 BQL BQL BQL BQL BQL BQL NA NA BQL
05/25/06
Sampling Ended
Sampling Ended
Sampling Ended
Sampling Ended
MW-26
MW-25
MW-23
MW-24
20200242.001A PAGE 8 OF 11
Volatile Organic Compounds by EPA Method 602
Sample ID Sample Date Benzene Toluene Ethylbenzene Xylenes Total BTEX MTBE IPE/DIPE Isopropylbenzene Naphthalene
SHALLOW MONITORING WELLS
TABLE 7: HISTORICAL GROUNDWATER ANALYTICAL RESULTS
06/19/02 950 36.3 67.90 411 1465 146 NA NA 594
01/14/04 1420 49.8 78.4 254 1802 342 NA NA 539
05/25/06 3390 168 265 632 4455 542 112 NA 72.9
01/24/07 1320 51.1 50 206.5 1627.6 280 34.1 NA 324
04/26/07 1457 55.6 64.4 213.6 1790.6 370 41.7 NA 310
07/26/07 1530 134 78.2 279 2021 438 38.8 NA 308
10/25/07 2540 107 84.7 274 3006 545 55.3 NA 49.6
03/19/08 895 72.6 42.9 201.1 1211.6 NA NA NA 236
09/23/08 1860 115 421 334 2730 422 41.3 NA 379
03/25-26/09 1340 67.4 57.7 251.6 1716.7 NA NA NA 504
12/20-21/11 1060 88 77.6 258 1484 267 69.2 NA 227
06/06/12 1780 80.4 55.2 200.4 2116 308 29 NA 249
12/19/12 2810 195 61.6 201.8 3268.4 333 24.4 11.3 309
05/16/13 2830 157 54.6 201.4 3243 371 33.2 <20 319
12/10/13 2600 171 75.4 346 3192 277 81.0 <20 312
05/15/14 3220 181 53.1 197.6 3651.7 321 41.2 <20 326
12/15/14 3840 198 67.6 208.6 4314.2 332 68.2 <25 357
06/10/15 3140 184 50.8 178.9 3553.7 279 27.3 <25 275
12/08/15 4000 241 68.0 220.9 4529.9 261 27.1 <25 370
06/29/16 3730 278 68.7 209.0 4285.7 228 <25 <25 324
12/12/16 4010 323 67.1 194.8 4594.9 215 <25 <25 343
06/08/17 4680 361 74.2 234 5349.2 203 <50 <50 360
12/12/17 5070 640 71.0 231 6012 193 <50 <50 316
05/15/18 6800 590 100 320 7810 210 27.0J NA 440
11/27/18 4900 550 69 230 5749 160 16 J NA 340
05/22/19 3600 640 52 180 4472 120 10 J NA 290
11/26/19 3000 470 51 170 3691 89 8.0 J NA 250
06/02/20 2800 560 59 J 180 J 3599 86 J <5.0 NA 190 J
06/19/02 BQL BQL BQL BQL BQL BQL NA NA BQL
01/14/04 BQL BQL BQL BQL BQL BQL NA NA BQL
05/25/06 BQL BQL BQL BQL BQL BQL BQL NA BQL
01/24/07 BQL BQL BQL BQL BQL BQL BQL NA BQL
04/26/07 BQL BQL BQL BQL BQL BQL BQL NA BQL
07/26/07 BQL BQL BQL BQL BQL BQL BQL NA BQL
10/25/07 BQL BQL BQL BQL BQL BQL BQL NA BQL
03/19/08 BQL BQL BQL BQL BQL NA NA NA BQL
09/23/08 BQL BQL BQL BQL BQL BQL BQL NA BQL
03/25-26/09 BQL BQL BQL BQL BQL NA NA NA BQL
12/20-21/11 <0.5 <0.5 <0.5 <1.0 <2.5 <0.5 <0.5 NA <0.5
06/06/12 <0.5 <0.5 <0.5 <1.0 <2.5 <0.5 <0.5 NA <0.5
01/02/13 <1.0 <1.0 <1.0 <3.0 <4.0 <1.0 <1.0 <1.0 <2.0
05/15/13 <1.0 <1.0 <1.0 <3.0 <6.0 <1.0 <1.0 <1.0 <2.0
12/09/13 <1.0 <1.0 <1.0 <3.0 <6.0 <1.0 <1.0 <1.0 <2.0
05/14/14 <1.0 <1.0 <1.0 <3.0 <6.0 <1.0 <1.0 <1.0 <2.0
12/14/14 <1.0 <1.0 <1.0 <3.0 <6.0 <1.0 <1.0 <1.0 <2.0
06/09/15 <1.0 <1.0 <1.0 <3.0 <6.0 <1.0 <1.0 <1.0 <2.0
12/08/15 <1.0 <1.0 <1.0 <3.0 <6.0 <1.0 <1.0 <1.0 <2.0
06/29/16 <1.0 <1.0 <1.0 <3.0 <6.0 <1.0 <1.0 <1.0 <2.0
12/13/16 <1.0 <1.0 2.5 <3.0 2.5 <1.0 <1.0 <1.0 <2.0
06/08/17 <1.0 <1.0 <1.0 <3.0 <6.0 <1.0 <1.0 <1.0 <2.0
12/12/17
11/18/99 BQL BQL BQL BQL BQL NA NA NA BQL
06/19/02 BQL BQL BQL BQL BQL BQL NA NA 5.29
01/14/04 BQL BQL BQL BQL BQL BQL NA NA BQL
05/25/06 BQL BQL BQL BQL BQL BQL BQL NA BQL
01/24/07 BQL BQL BQL BQL BQL BQL BQL NA BQL
04/26/07 BQL BQL BQL BQL BQL BQL BQL NA BQL
07/26/07 BQL BQL BQL BQL BQL BQL BQL NA BQL
10/25/07 BQL BQL BQL BQL BQL BQL BQL NA BQL
03/19/08 BQL BQL BQL 15 15 NA NA NA 9.6
09/23/08 BQL BQL BQL BQL BQL BQL BQL NA BQL
03/25-26/09 BQL BQL BQL BQL BQL NA NA NA BQL
12/20-21/11
01/07/97 BDL BDL 0.8 17 17.8 NA NA NA 11
11/18/99 BQL BQL BQL 13.9 13.9 NA NA NA 31
06/19/02 BQL BQL BQL 2.15 2.15 BQL NA NA 4.6
01/14/04 BQL BQL BQL 33.82 33.82 BQL NA NA 53.5
05/25/06 BQL BQL 0.56 45.58 46.14 1.62 BQL NA BQL
01/24/07 BQL BQL BQL 13.18 13.18 BQL BQL NA BQL
04/24/07 BQL BQL BQL 25.25 25.25 BQL BQL NA 7.1
07/26/07 BQL BQL BQL 61.1 61.1 BQL BQL NA 107
10/25/07 BQL BQL BQL 40.24 40.24 BQL BQL NA 48
03/19/08 BQL BQL BQL BQL BQL NA NA NA BQL
09/23/08 BQL BQL 4.42 30.99 35.41 BQL BQL NA 34.8
03/25-26/09 BQL BQL BQL 10.74 10.74 NA NA NA 18.8
12/20-21/11 <0.5 <0.5 <0.5 11.11 11.11 <0.5 <0.5 NA 10.1
06/06/12 <0.5 <0.5 <0.5 18.26 18.26 <0.5 <0.5 NA 33.7
12/18/12 <1.0 <1.0 <1.0 9.9 9.9 <1.0 <1.0 <1.0 16.6
05/15/13 <1.0 <1.0 5 34.1 39.1 <1.0 <1.0 <1.0 40.2
12/11/13 <1.0 <1.0 <1.0 45.5 45.5 <1.0 <1.0 <1.0 64.7
05/14/14 1.8 <1.0 <1.0 51.1 52.9 <1.0 <1.0 <1.0 58.2
12/15/14 <1.0 <1.0 <1.0 37.1 37.1 <1.0 <1.0 <1.0 66.1
06/10/15 <1.0 <1.0 <1.0 13.2 13.1 <1.0 <1.0 <1.0 23.1
12/09/15 <1.0 <1.0 <1.0 15.1 15.1 <1.0 <1.0 <1.0 29.1
06/30/16 <1.0 <1.0 <1.0 40.6 40.6 <1.0 <1.0 <1.0 56.6
12/13/16 <1.0 <1.0 <1.0 35.2 35.2 <1.0 <1.0 <1.0 78.2
06/08/17 <1.0 <1.0 <1.0 26.3 26.3 <1.0 <1.0 <1.0 41.3
12/12/17
06/02/20 <0.048 <0.044 <0.061 3.3 3.3 <0.042 <0.050 NA 9.1
Sampling Ended
Sampling Ended
MW-33
MW-34
Sampling Ended
MW-27
MW-28
20200242.001A PAGE 9 OF 11
Volatile Organic Compounds by EPA Method 602
Sample ID Sample Date Benzene Toluene Ethylbenzene Xylenes Total BTEX MTBE IPE/DIPE Isopropylbenzene Naphthalene
SHALLOW MONITORING WELLS
TABLE 7: HISTORICAL GROUNDWATER ANALYTICAL RESULTS
05/20/97 BDL BDL BDL BDL BDL NA NA NA BDL
11/18/99 NS NS NS NS NS NA NA NA NS
06/19/02 58.7 6.48 1.9 10.25 77.33 52.1 NA NA 12.1
01/14/04 5180 8040 1820 5660 20700 3150 NA NA 173
05/25/06 480 55.2 17.9 68.8 621.9 286 217 NA 29.4
01/24/07 1240 73.7 66.9 313 1693.6 611 259 NA 173
04/26/07 906 7.85 41.4 44.9 1000.15 741 261 NA 257
07/26/07 2000 502 167 693 3362 409 372 NA 208
10/25/07 2220 932 283 1239 4674 626 426 NA 265
03/19/08 2900 657 175 1146 4878 NA NA NA 292
09/23/08 1900 218 224 686 3028 808 383 NA 374
03/25-26/09 1420 47.1 63.6 415 1945.7 NA NA NA 354
12/20-21/11 2380 148 508 786 3822 913 508 NA 262
06/06/12 3400 298 218 1236 5152 1300 750 NA 71
12/17/12 1230 26.5 110 343 1709.5 717 321 29.8 237
05/13/13 931 <10 30.5 172.4 1133.9 698 305 14.5 239
12/10/13 919 14.6 51.1 235 1205.1 542 270 18.1 196
05/12/14 494 <5.0 5.4 108.2 607.6 417 160 10 170
12/15/14 1570 23.2 111.0 361 2065.2 711 389 25.3 302
06/09/15 808 <12.5 34.5 179.4 1022 519 252 16.7 203
12/07/15 918 <12.5 59.3 195.6 1172.9 491 260 18.6 210
06/30/16 403 3.3 22.4 83.7 512.4 304 148 22.4 96
12/13/16 1040 12.6 79.3 207.8 1339.7 526 309 20.2 197
06/07/17 936 7.8 51.4 165.3 1160.5 534 241 21.3 219
12/12/17 1370 22.7 128.0 274.5 1795.2 626 343 25.1 230
05/15/18 780 5.0 41.0 120 946.0 530 210 NA 190
11/27/18 620 5.8 63.0 140 828.8 400 200 NA 300
05/21/19 310 0.75 J 1.0 34 345.0 290 130 NA 66
11/25/19 1700 14.0 160.0 220 2094.0 750 390 NA 270
06/01/20 280 <0.44 4.2 J 30 314.0 310 160 NA 100
05/20/97 14.6 1.8 1 6.6 24 NA NA NA BDL
11/18/99 27.8 15.6 8 43.5 94.9 NA NA NA 7.1
06/19/02 5.82 1.48 1.82 5.27 14.39 64 NA NA 3.56
01/14/04 78.1 16.3 9.24 53.6 157.24 195 NA NA 32.3
05/25/06 51.9 1.54 3.8 9.83 67.07 521 79.2 NA BQL
01/24/07 IAD IAD IAD IAD IAD IAD IAD NA IAD
04/26/07
06/06/12 0.83 <0.5 1.24 <1.0 2.07 56.1 6.09 NA <0.5
12/17/12 2.7 <1.0 <1.0 <1.0 2.7 1660 187 <1.0 <2.0
05/13/13 <20 <20 30.3 27.8 58.1 1900 217 <20 67.2
12/10/13 <10 <10 <10 <10 <40 1630 194 <10 <20
05/12/14 <10 <10 <10 <30 <60 1800 204 <10 <20
12/15/14 <12.5 <12.5 <12.5 <37.5 <75 1760 207 <12.5 <25
06/09/15 <12.5 <12.5 <12.5 <37.5 <75 1580 184 <12.5 <25
12/07/15 <12.5 <12.5 <12.5 <37.5 <75 1530 168 <12.5 <25
06/27/16 <10 <10 <10 <30 <60 1340 159 <10 <20
12/12/16 <10 <10 <10 <30 <60 1300 170 <10 <20
06/07/17 <10 <10 <10 <30 <60 1620 171 <10 <20
12/12/17 <10 <10 <10 <30 <60 1160 163 <10 <20
05/15/18 <0.48 <0.44 <0.61 <1.5 <3.03 1700 190 NA <1.9
11/27/18 <0.48 <0.44 <0.61 <1.5 <3.03 1200 140 NA 8.8 J
05/21/19 0.5 <0.044 <0.061 <0.15 0.5 1400 160 NA 0.65 J
11/25/19 5.3 <0.44 <0.61 2.3 J 7.6 1300 170 NA 14 J
06/01/20 <4.8 <4.4 <6.1 <15 <15 1200 170 J NA 21 J
DEEP MONITORING WELLS
MW-5DR
MW-5D
Sampling Ended
MW-2D
20200242.001A PAGE 10 OF 11
Volatile Organic Compounds by EPA Method 602
Sample ID Sample Date Benzene Toluene Ethylbenzene Xylenes Total BTEX MTBE IPE/DIPE Isopropylbenzene Naphthalene
SHALLOW MONITORING WELLS
TABLE 7: HISTORICAL GROUNDWATER ANALYTICAL RESULTS
05/20/97 1.7 BDL BDL BDL 1.7 NA NA NA BDL
11/18/99 21.3 BQL BQL 10.7 21.3 NA NA NA 16.3
06/19/02 24.8 BQL 2.6 2.11 24.8 7.32 NA NA 18.2
01/14/04 19.3 BQL 8.73 BQL 19.3 9.21 NA NA 10.8
05/25/06 47.3 BQL 10.1 BQL 47.3 34.8 136 NA BQL
01/24/07 BQL BQL BQL BQL BQL 45.8 4.22 NA 1.14
04/26/07 46.4 BQL BQL 2.76 49.16 60.8 190 NA 1.67
07/26/07 39.2 BQL BQL 21.17 60.37 63.6 237 NA 2.64
10/25/07 122 BQL 31.8 2.77 156.57 68.2 241 NA 20.2
03/19/08 3.75 BQL BQL BQL 3.75 NA NA NA BQL
09/23/08 83.5 BQL 49.5 1.52 134.52 93.6 239 NA 16.2
03/25-26/09 220 BQL 38.6 7.7 266.3 NA NA NA 8.93
12/20-21/11 247 <0.5 18.3 27.4 292.7 386 275 NA 53
06/06/12 24.3 <0.5 19.1 2.44 45.84 300 276 NA 15.2
12/18/12 172 <10 <10 12.9 184.9 288 222 <10 33.9
05/13/13 192 <2.0 <2.0 12.8 204.8 354 290 6.9 29.4
12/10/13 170 <2.5 <2.5 15.2 185.2 295 223 8 30.3
05/12/14 191 <2.5 <2.5 13.8 204.8 370 235 7.5 28.4
12/15/14 200 <2.5 <2.5 9.8 209.8 357 251 8.0 32.5
06/09/15 133 <4.0 <4.0 7.4 140.4 349 185 5.6 19.4
12/07/15 114 <4.0 <4.0 9.0 123.0 321 172 5.8 21.5
06/30/16 117 15.4 <2.0 4.7 137.1 373 182 5.0 15.4
12/13/16 121 <2.5 <2.5 5.3 126.3 365 178 5.4 18.4
06/08/17 99.8 <2.0 <2.0 6.3 106.1 382 132 <2.0 16.0
12/12/17 93.0 <2.0 <2.0 3.3 96.3 350 144 6.0 13.4
05/15/18 100.0 <0.044 <0.061 3.5 103.5 400 150 NA 12.0
11/27/18 82.0 <0.044 <0.061 3.0 85.0 390 100 NA 12.0
05/23/19 80.0 <0.044 <0.061 3.2 83.2 460 110 NA 12.0
11/25/19 68.0 <0.044 <0.061 2.7 J 70.7 400 92 NA 9.4
06/02/20 48.0 <0.044 <0.061 1.9 J 49.9 360 81 NA 5.8
05/20/97 BDL BDL BDL BDL BDL NA NA NA BDL
11/18/99 1.5 BQL BQL BQL 1.5 NA NA NA BQL
06/19/02 3.65 BQL BQL BQL 3.65 0.48est NA NA 1.34
01/14/04 BQL BQL BQL BQL BQL BQL NA NA BQL
05/25/06
12/15/14 <1.0 1.9 <1.0 <3.0 1.9 26.6 5.5 <1.0 <2.0
06/09/15 2.1 <1.0 <1.0 <3.0 2.1 14.4 3.1 <1.0 <2.0
12/07/15 <1.0 <1.0 <1.0 <3.0 <6.0 5.5 <1.0 <1.0 <2.0
06/28/16 1 <1.0 <1.0 <3.0 1 4.9 <1.0 <1.0 <2.0
12/12/16 <1.0 <1.0 <1.0 <3.0 <6.0 2.6 <1.0 <1.0 <2.0
06/07/17 <1.0 <1.0 <1.0 <3.0 <6.0 2 <1.0 <1.0 <2.0
12/12/17
03/25-26/09 12300 25 61.8 1577 13963.8 NA NA NA 308
12/20-21/11 14700 20.7 209 1164 16093.7 <0.5 276 NA 9120
06/06/12 24600 21.5 224 1362 26207.5 10.2 238 NA 166
12/17/12 13100 6.8 186 862 14154.8 2.4 198 46.3 126
05/13/13 14400 <100 177 769 15346 <100 197 <100 <200
12/10/13 12700 <100 211 663 13574 <100 154 <100 <200
05/12/14 14300 <100 174 436 14910 <100 159 <100 <200
12/15/14 11700 <100 257 441 12398 <100 144 <100 <200
06/10/15 9980 <100 206 354 10540 <100 118 <100 <200
12/08/15 7020 <100 220 383 7623 <100 106 <100 <200
06/28/16 6390 <50 212 299 6901 <50 108 212 107
12/13/16 6430 <50 249 272 6951 <50 110 <50 120
06/08/17 4730 <50 195 211 5136 <50 74.1 <50 108
12/12/17 5900 <50 269 256 6425 <50 103 <50 132
05/15/18 5400 <0.44 230 280 5910 <0.42 110 NA 93
11/27/18 5000 <0.44 93 210 5303 <0.42 93 NA 88
05/21/19 7100 <0.44 150 280 7530 <0.42 99 NA 110
11/25/19 6000 <0.44 360 210 6570 <0.42 130 NA 110
06/01/20 4900 <4.4 310 200 J 5410 <4.2 140 J NA 85 J
NOTES:
1) Concentrations expressed in micrograms per liter (µg/L) 8) NS = Not Sampled
2) FP = Free product 9) Sample results prior to December 2015 were collected/reported by others
3) NA = Not analyzed 10) IPE/DIPE = Isopropylether/Diisopropylether
4) BQL = Below Quanitation Limit 11) MTBE = Methyl tert-butyl ether
5) BDL = Below Detection Limit 12) Total BTEX = Sum of benzene, toluene, ethylbenzene and xylenes concentrations
6) IA = Inaccessible
7) IAD = Inaccessible or Destroyed
Sampling Ended
Sampling Ended
MW-11D
MW-21D
MW-17D
MW-12D
20200242.001A PAGE 11 OF 11

20210520.001A | RAL20R113460 June 30, 2020
© 2020 Kleinfelder www.kleinfelder.com
FIGURES
CAD FILE: W:\Enviro\Client Proposal And Project Files\CRH Americas\Projects\20210520.001A - CRH GNC 1st Semi-annual Monitoring\2.8 Technical CADD Figures\Monitoring Well Set Revised 2020-6-24.dwgPROJECT LOCATION
1
DRAWN BY:
PROJECT NO.
CHECKED BY:
REVISED:
DATE:
FIGURE20210520
TLB
ARS
06/26/2020
-71SHEET:of
FORMERLY GNC ENERGY
100 S. CHIMNEY ROCK ROAD
GREENSBORO, NORTH CAROLINA
DISCLAIMER: INFORMATION REPRESENTED ON THIS MAP WAS DERIVED
FROM SECONDARY DATA SOURCES AND IS TO BE USED FOR GENERAL
PLANNING PURPOSES ONLY. NO WARRANTIES OR REPRESENTATIONS OF
ACCURACY ARE EXPRESSED OR IMPLIED.
0
SCALE IN FEET
2000 4000
SCALE: 1" = 2000'
PROPERTY BOUNDARY
GROUNDWATER FLOW
SOURCE: USGS NORTH CAROLINA-GUILFORD CO.
7.5-MINUTE SERIES (TOPOGRAPHIC) GUILFORD
QUADRANGLE 1997 (REV. 2001)
SOUTH CHIMNEY ROCK ROAD WEST MARKET STREETCAD FILE: W:\Enviro\Client Proposal and Project Files\CRH Americas\Projects\20210520.001A - CRH GNC 1st Semi-annual Monitoring\2.8 Technical CADD Figures\Monitoring Well Set Revised 2020-6-24.dwgwww.kleinfelder.com0.5 1.0 2.01.50
ORIGINAL SCALE IN INCHES FOR
REDUCED PLANSFORMERLY GNC ENERGY100 S. CHIMNEY ROCK ROADGREENSBORO, NORTH CAROLINAPLANT LAYOUT MAP2
2 7 20200242PH. 919-755-5011 FAX. [phone]MORRISVILLE, NC 275603500 GATEWAY CENTRE BLVD., Ste 20006/26/2020
1"=100'
TLB
ARS
ARS
Storm
Water
Basin
10
03
04
09 08
21
07
22
01
02
05
06
Storm
Water
Basin
Office
& Lab
Boiler
House
LEGEND
PRODUCT
LIQUID ASPHALT TANK
LIQUID ASPHALT TANK
LIQUID ASPHALT TANK
LIQUID ASPHALT TANK
LIQUID ASPHALT TANK
LIQUID ASPHALT TANK
LIQUID ASPHALT TANK
LIQUID ASPHALT TANK
LIQUID ASPHALT TANK
LIQUID ASPHALT TANK
# 2 FUEL OIL TANK
1
TANK ID
2
3
4
5
6
7
8
9
10
CAPACITY (GALLONS)
1,008,000 gal.
1,050,000 gal.
630,000 gal.
630,000 gal.
630,000 gal.
630,000 gal.
210,000 gal.
1,050,000 gal.
1,260,000 gal.
2,184,000 gal.
15,000 gal.16
17
18
19
21
22
23
AAXL
HO-1
HO-2
HO-3
LD1
LD2
LD3
LD4
M1
AD-HERE FATTY AMINE ASPHALT ADDITIVE 8,017 gal.
3,049 gal.
10,000 gal.
1,100,000 gal.
2,268,000 gal.
7630 X 3 COMPARTMENTS
10,000 gal.
440 gal.
440 gal.
440 gal.
40,000 gal.
40,000 gal.
40,000 gal.
40,000 gal.
8,000 gal.
8,000 gal.
AD-HERE FATTY AMINE ASPHALT ADDITIVE
# 2 FUEL OIL TANK
LIQUID ASPHALT TANK
LIQUID ASPHALT TANK
LIQUID ASPHALT TANK
LIQUID ASPHALT TANK
LIQUID ASPHALT TANK
LIQUID ASPHALT TANK
FATTY AMINE ASPHALT ADDITIVE
MINERAL OIL BASED ASPHALT ADDITIVE
HOT OIL
HOT OIL
HOT OIL
PMA PROCESS/MIX TANK
PMA PROCESS/MIX TANKM2
LIQUID ASPHALT TANK
LIQUID ASPHALT TANK
V1
V2
40,000 gal.
40,000 gal.
PROPERTY BOUNDARY
SEPTIC DRAIN FIELD
ABOVE GROUND PIPELINES
RAILROAD
FENCE
LD4
LD3
LD2
LD1
V1
V2 M1M2
HO-1
TRANSFORMER
(UTILITY OWNED)19
AAXL
R6
16 23
R3 & R4
R1 & R2
17 18
HO-3
HO-2XN
VariesFUEL RACKR
SOUTH CHIMNEY ROCK ROAD WEST MARKET STREETMW-27
MW-4
MW-2S
MW-2D
MW-DRMW-DR
MW-DRMW-DR
(AW-8)(AW-7)
(MW-34)(MW-33)
MW-20
MW-21
MW-21D
MW-6
MW-17D
PROPERTY BOUNDARY
SHALLOW MONITORING WELL
DEEP MONITORING WELL
CAD FILE: W:\Enviro\Client Proposal and Project Files\CRH Americas\Projects\20210520.001A - CRH GNC 1st Semi-annual Monitoring\2.8 Technical CADD Figures\Monitoring Well Set Revised 2020-6-24.dwgwww.kleinfelder.com0.5 1.0 2.01.50
ORIGINAL SCALE IN INCHES FOR
REDUCED PLANSFORMERLY GNC ENERGY100 S. CHIMNEY ROCK ROADGREENSBORO, NORTH CAROLINASITE MAPWITH MONITORING WELLLOCATIONS2a
3 7 20200242PH. 919-755-5011 FAX. [phone]MORRISVILLE, NC 275603500 GATEWAY CENTRE BLVD., Ste 20006/26/2020
1"=100'
TLB
ARS
ARS
MW-12S
MW-12D
AMW-1
MW-11D
MW-11S
MW-14
MW-5SR
MW-5DR
MW-15
MW-25
MW-26
MW-16
MW-7 MW-10
MW-28
MW-9
MW-24
MW-3R
MW-17
MW-13
MW-19
MW-8
MW-23
Storm
Water
Basin
Storm
Water
Basin
ABANDONED SHALLOW MONITORING WELL
ABANDONED DEEP MONITORING WELL
Office
& Lab
Boiler
House
MW-22
LEGEND
N
SOUTH CHIMNEY ROCK ROAD WEST MARKET STREETMW-12S
MW-12D
AMW-1
MW-11D
MW-11S
MW-14
MW-5SR
MW-5DR
MW-15
MW-25
MW-26
MW-16
MW-7 MW-10
MW-28
MW-9
MW-24
MW-3R
MW-17
MW-13
MW-4 MW-2D
MW-2S
(MW-34)
(924.56)(MW-33)
MW-DR
(AW-7)
MW-DR
(AW-8)
MW-DR
MW-8
MW-23
MW-27
MW-20
MW-21D
MW-21
MW-6
MW-17D
Storm
Water
Basin
Storm
Water
Basin
Office
& Lab
Boiler
House
MW-22
PROPERTY BOUNDARY
SHALLOW MONITORING WELL
DEEP MONITORING WELL
ABANDONED SHALLOW MONITORING WELL
ABANDONED DEEP MONITORING WELL
LEGEND
GROUNDWATER ELEVATION
GROUNDWATER CONTOUR
DIRECTION OF GROUNDWATER FLOW
NOTE: NM - NOT MEASURED
(NM)(925.20)
(NM)
(921.44)
(NM)
(NM)
(NM)
(925.94)
(NM)
(NM)
(NM)
(NM)
MW-19
(NM)
(NM)
(926.20)
(NM)
(925.57)
(NM)
(925.20)
(NM)
(NM)
(NM)NCAD FILE: W:\Enviro\Client Proposal and Project Files\CRH Americas\Projects\20210520.001A - CRH GNC 1st Semi-annual Monitoring\2.8 Technical CADD Figures\Monitoring Well Set Revised 2020-6-24.dwgwww.kleinfelder.com0.5 1.0 2.01.50
ORIGINAL SCALE IN INCHES FOR
REDUCED PLANSFORMERLY GNC ENERGY100 S. CHIMNEY ROCK ROADGREENSBORO, NORTH CAROLINA3
4 7 20200242PH. 919-755-5011 FAX. [phone]MORRISVILLE, NC 275603500 GATEWAY CENTRE BLVD., Ste 20006/26/2020
1"=100'
TLB
ARS
ARSSHALLOWPOTENTIOMETRICSURFACE MAP922
923
924
925 926
SOUTH CHIMNEY ROCK ROAD WEST MARKET STREETMW-12S
MW-12D
AMW-1
MW-11D
MW-11S
MW-14
MW-5SR
MW-5DR
MW-15
MW-25
MW-26
MW-16
MW-7 MW-10
MW-28
MW-9
MW-24
MW-3R
MW-17
MW-13
MW-19
MW-4 MW-2D
MW-2S
MW-34
MW-DR
(MW-33)
MW-DR
(AW-7)
MW-DR
(AW-8)
MW-DR
MW-8
MW-23
MW-27
MW-20
MW-21D
MW-21
MW-6
MW-17D
(NM)
Storm
Water
Basin
Storm
Water
Basin
Office
& Lab
Boiler
House
MW-22
PROPERTY BOUNDARY
SHALLOW MONITORING WELL
DEEP MONITORING WELL
ABANDONED SHALLOW MONITORING WELL
ABANDONED DEEP MONITORING WELL
LEGEND
GROUNDWATER ELEVATION
GROUNDWATER CONTOUR
DIRECTION OF GROUNDWATER FLOW
(910.68)
(910.68)
(916.93)
(926.04)
(925.01)NNOT MEASUREDNM
CAD FILE: W:\Enviro\Client Proposal and Project Files\CRH Americas\Projects\20210520.001A - CRH GNC 1st Semi-annual Monitoring\2.8 Technical CADD Figures\Monitoring Well Set Revised 2020-6-24.dwgwww.kleinfelder.com0.5 1.0 2.01.50
ORIGINAL SCALE IN INCHES FOR
REDUCED PLANSFORMERLY GNC ENERGY100 S. CHIMNEY ROCK ROADGREENSBORO, NORTH CAROLINA4
5 7 20200242PH. 919-755-5011 FAX. [phone]MORRISVILLE, NC 275603500 GATEWAY CENTRE BLVD., Ste 20006/26/2020
1"=100'
TLB
ARS
ARSDEEPPOTENTIOMETRICSURFACE918919
920921922923924925
SOUTH CHIMNEY ROCK ROAD WEST MARKET STREETCAD FILE: W:\Enviro\Client Proposal and Project Files\CRH Americas\Projects\20210520.001A - CRH GNC 1st Semi-annual Monitoring\2.8 Technical CADD Figures\Monitoring Well Set Revised 2020-6-24.dwgwww.kleinfelder.com0.5 1.0 2.01.50
ORIGINAL SCALE IN INCHES FOR
REDUCED PLANSFORMERLY GNC ENERGY100 S. CHIMNEY ROCK ROADGREENSBORO, NORTH CAROLINASHALLOWBENZENECONCENTRATIONS5
6 7 20200242PH. 919-755-5011 FAX. [phone]MORRISVILLE, NC 275603500 GATEWAY CENTRE BLVD., Ste 20006/26/2020
1"=100'
TLB
ARS
ARS
MW-12S
MW-12D
AMW-1
MW-11D
MW-11S
MW-14
MW-5SR
MW-5DR
MW-15
MW-25
MW-26
MW-16
MW-7 MW-10
MW-28
MW-9
MW-24
MW-3R
MW-17
MW-13
MW-19
MW-4 MW-2D
MW-2S
MW-34
(<0.048)
(MW-33)
MW-DR
(AW-7)
MW-DR
(AW-8)
MW-DR
MW-8
MW-23
MW-27
MW-21
Storm
Water
Basin
Storm
Water
Basin
Office
& Lab
Boiler
House
MW-22
PROPERTY BOUNDARY
SHALLOW MONITORING WELL
DEEP MONITORING WELL
ABANDONED SHALLOW MONITORING WELL
ABANDONED DEEP MONITORING WELL
LEGEND
BENZENE CONCENTRATION
BENZENE CONTOUR
(NS)(3100)
(NS)
(NS)
(2800)
(NS)
(3100)
(NS)
(NS)
(NS)(NS)
(NS)
(NS)
NOTE: CONCENTRATIONS REPORTED
IN MICROGRAMS PER LITER (ug/l)
(4100)
(NS)
MW-6
MW-17DN MW-20
MW-21D
(3600)
(NS)
(NS)
(NS)
(NS)
(820)
(NS)
NOT SAMPLEDNS
4000
SOUTH CHIMNEY ROCK ROAD WEST MARKET STREETCAD FILE: W:\Enviro\Client Proposal and Project Files\CRH Americas\Projects\20210520.001A - CRH GNC 1st Semi-annual Monitoring\2.8 Technical CADD Figures\Monitoring Well Set Revised 2020-6-24.dwgwww.kleinfelder.com0.5 1.0 2.01.50
ORIGINAL SCALE IN INCHES FOR
REDUCED PLANSFORMERLY GNC ENERGY100 S. CHIMNEY ROCK ROADGREENSBORO, NORTH CAROLINADEEPBENZENEISOCONCENTRATIONS6
7 7 20200242PH. 919-755-5011 FAX. [phone]MORRISVILLE, NC 275603500 GATEWAY CENTRE BLVD., Ste 20006/26/2020
1"=100'
TLB
ARS
ARS
MW-12S
MW-12D
AMW-1
MW-11D
MW-11S
MW-14
MW-5SR
MW-5DR
MW-15
MW-25
MW-26
MW-16
MW-7 MW-10
MW-28
MW-9
MW-24
MW-3R
MW-17
MW-13
MW-19
MW-4 MW-2D
MW-2S
(MW-34)
(MW-33)
MW-DR
(AW-7)
MW-DR
(AW-8)
MW-DR
MW-8
MW-23
MW-27
MW-20
MW-21D
MW-21
MW-6
MW-17D
Storm
Water
Basin
Storm
Water
Basin
Office
& Lab
Boiler
House
MW-22
PROPERTY BOUNDARY
SHALLOW MONITORING WELL
DEEP MONITORING WELL
ABANDONED SHALLOW MONITORING WELL
ABANDONED DEEP MONITORING WELL
LEGEND
BENZENE CONCENTRATION
BENZENE CONTOUR
(48)
(68)
(<4.8)
(NS)
(4900)
(280)NOTE: CONCENTRATIONS REPORTED
IN MICROGRAMS PER LITER (ug/l)N4000

20210520.001A | RAL20R113460 June 30, 2020
© 2020 Kleinfelder www.kleinfelder.com
GRAPHS

0
1000
2000
3000
4000
5000
6000
7000
8000
0
2
4
6
8
10
12
14
16
18
20
Jan-04Jul-04Jan-05Jul-05Jan-06Jul-06Jan-07Jul-07Jan-08Jul-08Jan-09Jul-09Jan-10Jul-10Jan-11Jul-11Jan-12Jul-12Jan-13Jul-13Jan-14Jul-14Jan-15Jul-15Jan-16Jul-16Jan-17Jul-17Jan-18Jul-18Jan-19Jul-19Jan-20Jul-20Benzene Concentrations (ug/L)Water Level (Feet Below Top of Casing)Date
Graph 1: MW-27 Benzene vs Water Level
WL
Benzene
0
5000
10000
15000
20000
25000
0
2
4
6
8
10
12
14
16
18
20
Jan-04Jul-04Jan-05Jul-05Jan-06Jul-06Jan-07Jul-07Jan-08Jul-08Jan-09Jul-09Jan-10Jul-10Jan-11Jul-11Jan-12Jul-12Jan-13Jul-13Jan-14Jul-14Jan-15Jul-15Jan-16Jul-16Jan-17Jul-17Jan-18Jul-18Jan-19Jul-19Jan-20Jul-20Benzene Concentration (ug/L)Water Levels (Feet Below Top of Casing)Date
Graph 2: MW-21 Benzene vs Water Level
WL
Benzene
0
1000
2000
3000
4000
5000
6000
7000
0
2
4
6
8
10
12
14
16
18
20
Jan-04Jul-04Jan-05Jul-05Jan-06Jul-06Jan-07Jul-07Jan-08Jul-08Jan-09Jul-09Jan-10Jul-10Jan-11Jul-11Jan-12Jul-12Jan-13Jul-13Jan-14Jul-14Jan-15Jul-15Jan-16Jul-16Jan-17Jul-17Jan-18Jul-18Jan-19Jul-19Jan-20Jul-20Benzene Concentration (ug/L)Water Level (Feet Below Top of Casing)Date
Graph 3: MW-17 Benzene vs Water Levels
WL
Benzene
0
5000
10000
15000
20000
25000
30000
0
2
4
6
8
10
12
14
16
18
20
Benzene Concentrations (ug/L)Water Level (Feet Below Top of Casing)Date
Graph 4: MW-21D Benzene vs Water Level
WL
Benzene

20210520.001A | RAL20R113460 June 30, 2020
© 2020 Kleinfelder www.kleinfelder.com

APPENDIX A
LABORATORY REPORT AND CHAIN-OF-CUSTODY DOCUMENT
This data package contains the analytical results for the project identified above and includes a Case Narrative, Sample
Results and Chain of Custody. Unless otherwise noted, all samples were received in acceptable condition and processed
according to the referenced methods.
Data qualifiers are flagged individually on each sample. A key reference for the data qualifiers appears at the end of this case
narrative.
NC Certification No. 402
NC Drinking Water Cert No. 37735
SC Certification No. 99012
Case Narrative
6/10/20 11:20
Kleinfelder SE, Inc. (Morrisville)
Mike Burns
3200 Gateway Centre Blvd. Suite 100
Morrisville, NC 27560
Project: CRH GNC
Lab Submittal Date: 06/04/2020
Work Order: 0060843
Please call if you have any questions relating to this analytical report.
Respectfully,
WAYPOINT ANALYTICAL
Senior Project Manager
Angela D. Overcash
Data Qualifiers Key Reference:
J Detected but below the Reporting Limit; therefore, result is an estimated concentration (CLP J-Flag).
Method Detection LimitMDL
Below Reporting LimitBRL
Relative Percent DifferenceRPD
*Results reported to the reporting limit. All other results are reported to the MDL with values between MDL and
reporting limit indicated with a J.
This report should not be reproduced, except in its entirety, without the written consent of Waypoint Analytical.
449 Springbrook Road - P.O. Box 240543 - Charlotte, NC 28224-0543
Phone: [phone] - Toll Free Number: 1-800/529-6364 - Fax: [phone] Page 1 of 19
Sample Receipt Summary
06/10/2020
Work Order: 0060843
Client Sample ID MatrixLab Sample ID Date/Time Sampled Date/Time Received
0060843-01 06/01/20 10:30MW-21D 06/04/20 15:45Water
0060843-02 06/01/20 11:38MW-21 06/04/20 15:45Water
0060843-03 06/01/20 12:42MW-5DR 06/04/20 15:45Water
0060843-04 06/01/20 14:04MW-5SR 06/04/20 15:45Water
0060843-05 06/01/20 15:35MW-2D 06/04/20 15:45Water
0060843-06 06/01/20 16:10MW-2S 06/04/20 15:45Water
0060843-07 06/02/20 10:30MW-11D 06/04/20 15:45Water
0060843-08 06/02/20 12:17MW-34 06/04/20 15:45Water
0060843-09 06/02/20 14:10MW-17 06/04/20 15:45Water
0060843-10 06/02/20 15:32MW-27 06/04/20 15:45Water
0060843-11 06/02/20 0:00Trip Blank 06/04/20 15:45Water
Samples were received in good condition at 2.1 degrees C unless otherwise noted.
This report should not be reproduced, except in its entirety, without the written consent of Waypoint Analytical.
449 Springbrook Road - P.O. Box 240543 - Charlotte, NC 28224-0543
Phone: [phone] - Toll Free Number: 1-800/529-6364 - Fax: [phone] Page 2 of 19
Client ID ResultParameterMethod UnitsWaypoint ID
Work Order: 0060843
06/10/2020
Summary of Detections
4900 ug/L0060843-01 MW-21D Benzene SM6200 B
310 ug/L0060843-01 MW-21D Ethylbenzene SM6200 B
140 J ug/L0060843-01 MW-21D Isopropyl Ether SM6200 B
180 J ug/L0060843-01 MW-21D m,p-Xylenes SM6200 B
85 J ug/L0060843-01 MW-21D Naphthalene SM6200 B
25 J ug/L0060843-01 MW-21D o-Xylene SM6200 B
200 J ug/L0060843-01 MW-21D Xylenes, total SM6200 B
3600 ug/L0060843-02 MW-21 Benzene SM6200 B
2500 ug/L0060843-02 MW-21 Ethylbenzene SM6200 B
5000 ug/L0060843-02 MW-21 m,p-Xylenes SM6200 B
230 J ug/L0060843-02 MW-21 Naphthalene SM6200 B
1200 ug/L0060843-02 MW-21 o-Xylene SM6200 B
170 ug/L0060843-02 MW-21 Toluene SM6200 B
6200 ug/L0060843-02 MW-21 Xylenes, total SM6200 B
170 J ug/L0060843-03 MW-5DR Isopropyl Ether SM6200 B
1200 ug/L0060843-03 MW-5DR Methyl-tert-Butyl Ether SM6200 B
21 J ug/L0060843-03 MW-5DR Naphthalene SM6200 B
820 ug/L0060843-04 MW-5SR Benzene SM6200 B
330 ug/L0060843-04 MW-5SR Ethylbenzene SM6200 B
31 J ug/L0060843-04 MW-5SR Isopropyl Ether SM6200 B
74 ug/L0060843-04 MW-5SR m,p-Xylenes SM6200 B
180 ug/L0060843-04 MW-5SR Methyl-tert-Butyl Ether SM6200 B
370 ug/L0060843-04 MW-5SR Naphthalene SM6200 B
5.9 J ug/L0060843-04 MW-5SR o-Xylene SM6200 B
33 ug/L0060843-04 MW-5SR Toluene SM6200 B
80 ug/L0060843-04 MW-5SR Xylenes, total SM6200 B
280 ug/L0060843-05 MW-2D Benzene SM6200 B
4.2 J ug/L0060843-05 MW-2D Ethylbenzene SM6200 B
160 ug/L0060843-05 MW-2D Isopropyl Ether SM6200 B
2.1 J ug/L0060843-05 MW-2D m,p-Xylenes SM6200 B
310 ug/L0060843-05 MW-2D Methyl-tert-Butyl Ether SM6200 B
100 ug/L0060843-05 MW-2D Naphthalene SM6200 B
28 ug/L0060843-05 MW-2D o-Xylene SM6200 B
30 ug/L0060843-05 MW-2D Xylenes, total SM6200 B
3100 ug/L0060843-06 MW-2S Benzene SM6200 B
2400 ug/L0060843-06 MW-2S Ethylbenzene SM6200 B
29 J ug/L0060843-06 MW-2S Isopropyl Ether SM6200 B
1700 ug/L0060843-06 MW-2S m,p-Xylenes SM6200 B
52 J ug/L0060843-06 MW-2S Methyl-tert-Butyl Ether SM6200 B
180 J ug/L0060843-06 MW-2S Naphthalene SM6200 B
220 ug/L0060843-06 MW-2S o-Xylene SM6200 B
120 ug/L0060843-06 MW-2S Toluene SM6200 B
1900 ug/L0060843-06 MW-2S Xylenes, total SM6200 B
48 ug/L0060843-07 MW-11D Benzene SM6200 B
This report should not be reproduced, except in its entirety, without the written consent of Waypoint Analytical.
449 Springbrook Road - P.O. Box 240543 - Charlotte, NC 28224-0543
Phone: [phone] - Toll Free Number: 1-800/529-6364 - Fax: [phone] Page 3 of 19
Client ID ResultParameterMethod UnitsWaypoint ID
Work Order: 0060843
06/10/2020
Summary of Detections
81 ug/L0060843-07 MW-11D Isopropyl Ether SM6200 B
360 ug/L0060843-07 MW-11D Methyl-tert-Butyl Ether SM6200 B
5.8 ug/L0060843-07 MW-11D Naphthalene SM6200 B
1.9 ug/L0060843-07 MW-11D o-Xylene SM6200 B
1.9 J ug/L0060843-07 MW-11D Xylenes, total SM6200 B
0.62 J ug/L0060843-08 MW-34 m,p-Xylenes SM6200 B
9.1 ug/L0060843-08 MW-34 Naphthalene SM6200 B
2.6 ug/L0060843-08 MW-34 o-Xylene SM6200 B
3.3 ug/L0060843-08 MW-34 Xylenes, total SM6200 B
4100 ug/L0060843-09 MW-17 Benzene SM6200 B
2300 ug/L0060843-09 MW-17 Ethylbenzene SM6200 B
630 ug/L0060843-09 MW-17 Isopropyl Ether SM6200 B
570 ug/L0060843-09 MW-17 m,p-Xylenes SM6200 B
3500 ug/L0060843-09 MW-17 Methyl-tert-Butyl Ether SM6200 B
420 J ug/L0060843-09 MW-17 Naphthalene SM6200 B
39 J ug/L0060843-09 MW-17 Toluene SM6200 B
570 ug/L0060843-09 MW-17 Xylenes, total SM6200 B
2800 ug/L0060843-10 MW-27 Benzene SM6200 B
59 J ug/L0060843-10 MW-27 Ethylbenzene SM6200 B
87 J ug/L0060843-10 MW-27 m,p-Xylenes SM6200 B
86 J ug/L0060843-10 MW-27 Methyl-tert-Butyl Ether SM6200 B
190 J ug/L0060843-10 MW-27 Naphthalene SM6200 B
88 J ug/L0060843-10 MW-27 o-Xylene SM6200 B
560 ug/L0060843-10 MW-27 Toluene SM6200 B
180 J ug/L0060843-10 MW-27 Xylenes, total SM6200 B
This report should not be reproduced, except in its entirety, without the written consent of Waypoint Analytical.
449 Springbrook Road - P.O. Box 240543 - Charlotte, NC 28224-0543
Phone: [phone] - Toll Free Number: 1-800/529-6364 - Fax: [phone] Page 4 of 19
Laboratory Report
06/10/2020
ResultParameter Batch
ID
Report
Limit
Analysis
Date/Time
MethodDilution
Factor
Units MDL Analyst
3200 Gateway Centre Blvd. Suite 100
Project: CRH GNCKleinfelder SE, Inc. (Morrisville)
Morrisville, NC 27560
Attn: Mike Burns
Sample Matrix: Water
Client Sample ID: MW-21D
Sample ID: 0060843-01
Work Order: 0060843
Time Collected: 06/01/20 10:30
Time Submitted: 06/04/20 15:45
Volatile Organic 602 Compounds by GC/MS
4900 SM6200 B P0F0832100506/5/20 15:58 JLBug/L 4.8Benzene
310 SM6200 B P0F08321001006/5/20 15:58 JLBug/L 6.1Ethylbenzene
140 SM6200 B P0F08321005006/5/20 15:58 JLBJug/L 5.0Isopropyl Ether
180 SM6200 B P0F08321002006/5/20 15:58 JLBJug/L 12m,p-Xylenes
BRL SM6200 B P0F08321005006/5/20 15:58 JLBug/L 4.2Methyl-tert-Butyl Ether
85 SM6200 B P0F08321005006/5/20 15:58 JLBJug/L 19Naphthalene
25 SM6200 B P0F08321001006/5/20 15:58 JLBJug/L 4.4o-Xylene
BRL SM6200 B P0F08321001006/5/20 15:58 JLBug/L 4.4Toluene
200 SM6200 B P0F08321003006/5/20 15:58 JLBJug/L 15Xylenes, total
Surrogate Recovery Control Limits
70-13093 %4-Bromofluorobenzene
70-13091 %Dibromofluoromethane
70-13095 %Toluene-d8
This report should not be reproduced, except in its entirety, without the written consent of Waypoint Analytical.
449 Springbrook Road - P.O. Box 240543 - Charlotte, NC 28224-0543
Phone: [phone] - Toll Free Number: 1-800/529-6364 - Fax: [phone] Page 5 of 19
Laboratory Report
06/10/2020
ResultParameter Batch
ID
Report
Limit
Analysis
Date/Time
MethodDilution
Factor
Units MDL Analyst
3200 Gateway Centre Blvd. Suite 100
Project: CRH GNCKleinfelder SE, Inc. (Morrisville)
Morrisville, NC 27560
Attn: Mike Burns
Sample Matrix: Water
Client Sample ID: MW-21
Sample ID: 0060843-02
Work Order: 0060843
Time Collected: 06/01/20 11:38
Time Submitted: 06/04/20 15:45
Volatile Organic 602 Compounds by GC/MS
3600 SM6200 B P0F0832100506/5/20 18:01 JLBug/L 4.8Benzene
2500 SM6200 B P0F08321001006/5/20 18:01 JLBug/L 6.1Ethylbenzene
BRL SM6200 B P0F08321005006/5/20 18:01 JLBug/L 5.0Isopropyl Ether
5000 SM6200 B P0F08321002006/5/20 18:01 JLBug/L 12m,p-Xylenes
BRL SM6200 B P0F08321005006/5/20 18:01 JLBug/L 4.2Methyl-tert-Butyl Ether
230 SM6200 B P0F08321005006/5/20 18:01 JLBJug/L 19Naphthalene
1200 SM6200 B P0F08321001006/5/20 18:01 JLBug/L 4.4o-Xylene
170 SM6200 B P0F08321001006/5/20 18:01 JLBug/L 4.4Toluene
6200 SM6200 B P0F08321003006/5/20 18:01 JLBug/L 15Xylenes, total
Surrogate Recovery Control Limits
70-13094 %4-Bromofluorobenzene
70-13092 %Dibromofluoromethane
70-13096 %Toluene-d8
This report should not be reproduced, except in its entirety, without the written consent of Waypoint Analytical.
449 Springbrook Road - P.O. Box 240543 - Charlotte, NC 28224-0543
Phone: [phone] - Toll Free Number: 1-800/529-6364 - Fax: [phone] Page 6 of 19
Laboratory Report
06/10/2020
ResultParameter Batch
ID
Report
Limit
Analysis
Date/Time
MethodDilution
Factor
Units MDL Analyst
3200 Gateway Centre Blvd. Suite 100
Project: CRH GNCKleinfelder SE, Inc. (Morrisville)
Morrisville, NC 27560
Attn: Mike Burns
Sample Matrix: Water
Client Sample ID: MW-5DR
Sample ID: 0060843-03
Work Order: 0060843
Time Collected: 06/01/20 12:42
Time Submitted: 06/04/20 15:45
Volatile Organic 602 Compounds by GC/MS
BRL SM6200 B P0F0832100506/5/20 14:44 JLBug/L 4.8Benzene
BRL SM6200 B P0F08321001006/5/20 14:44 JLBug/L 6.1Ethylbenzene
170 SM6200 B P0F08321005006/5/20 14:44 JLBJug/L 5.0Isopropyl Ether
BRL SM6200 B P0F08321002006/5/20 14:44 JLBug/L 12m,p-Xylenes
1200 SM6200 B P0F08321005006/5/20 14:44 JLBug/L 4.2Methyl-tert-Butyl Ether
21 SM6200 B P0F08321005006/5/20 14:44 JLBJug/L 19Naphthalene
BRL SM6200 B P0F08321001006/5/20 14:44 JLBug/L 4.4o-Xylene
BRL SM6200 B P0F08321001006/5/20 14:44 JLBug/L 4.4Toluene
BRL SM6200 B P0F08321003006/5/20 14:44 JLBug/L 15Xylenes, total
Surrogate Recovery Control Limits
70-13095 %4-Bromofluorobenzene
70-13092 %Dibromofluoromethane
70-13096 %Toluene-d8
This report should not be reproduced, except in its entirety, without the written consent of Waypoint Analytical.
449 Springbrook Road - P.O. Box 240543 - Charlotte, NC 28224-0543
Phone: [phone] - Toll Free Number: 1-800/529-6364 - Fax: [phone] Page 7 of 19
Laboratory Report
06/10/2020
ResultParameter Batch
ID
Report
Limit
Analysis
Date/Time
MethodDilution
Factor
Units MDL Analyst
3200 Gateway Centre Blvd. Suite 100
Project: CRH GNCKleinfelder SE, Inc. (Morrisville)
Morrisville, NC 27560
Attn: Mike Burns
Sample Matrix: Water
Client Sample ID: MW-5SR
Sample ID: 0060843-04
Work Order: 0060843
Time Collected: 06/01/20 14:04
Time Submitted: 06/04/20 15:45
Volatile Organic 602 Compounds by GC/MS
820 SM6200 B P0F0832105.0 6/5/20 16:47 JLBug/L 0.48Benzene
330 SM6200 B P0F083210106/5/20 16:47 JLBug/L 0.61Ethylbenzene
31 SM6200 B P0F083210506/5/20 16:47 JLBJug/L 0.50Isopropyl Ether
74 SM6200 B P0F083210206/5/20 16:47 JLBug/L 1.2m,p-Xylenes
180 SM6200 B P0F083210506/5/20 16:47 JLBug/L 0.42Methyl-tert-Butyl Ether
370 SM6200 B P0F083210506/5/20 16:47 JLBug/L 1.9Naphthalene
5.9 SM6200 B P0F083210106/5/20 16:47 JLBJug/L 0.44o-Xylene
33 SM6200 B P0F083210106/5/20 16:47 JLBug/L 0.44Toluene
80 SM6200 B P0F083210306/5/20 16:47 JLBug/L 1.5Xylenes, total
Surrogate Recovery Control Limits
70-13095 %4-Bromofluorobenzene
70-13091 %Dibromofluoromethane
70-13095 %Toluene-d8
This report should not be reproduced, except in its entirety, without the written consent of Waypoint Analytical.
449 Springbrook Road - P.O. Box 240543 - Charlotte, NC 28224-0543
Phone: [phone] - Toll Free Number: 1-800/529-6364 - Fax: [phone] Page 8 of 19
Laboratory Report
06/10/2020
ResultParameter Batch
ID
Report
Limit
Analysis
Date/Time
MethodDilution
Factor
Units MDL Analyst
3200 Gateway Centre Blvd. Suite 100
Project: CRH GNCKleinfelder SE, Inc. (Morrisville)
Morrisville, NC 27560
Attn: Mike Burns
Sample Matrix: Water
Client Sample ID: MW-2D
Sample ID: 0060843-05
Work Order: 0060843
Time Collected: 06/01/20 15:35
Time Submitted: 06/04/20 15:45
Volatile Organic 602 Compounds by GC/MS
280 SM6200 B P0F0832105.0 6/5/20 19:15 JLBug/L 0.48Benzene
4.2 SM6200 B P0F083210106/5/20 19:15 JLBJug/L 0.61Ethylbenzene
160 SM6200 B P0F083210506/5/20 19:15 JLBug/L 0.50Isopropyl Ether
2.1 SM6200 B P0F083210206/5/20 19:15 JLBJug/L 1.2m,p-Xylenes
310 SM6200 B P0F083210506/5/20 19:15 JLBug/L 0.42Methyl-tert-Butyl Ether
100 SM6200 B P0F083210506/5/20 19:15 JLBug/L 1.9Naphthalene
28 SM6200 B P0F083210106/5/20 19:15 JLBug/L 0.44o-Xylene
BRL SM6200 B P0F083210106/5/20 19:15 JLBug/L 0.44Toluene
30 SM6200 B P0F083210306/5/20 19:15 JLBug/L 1.5Xylenes, total
Surrogate Recovery Control Limits
70-13094 %4-Bromofluorobenzene
70-13092 %Dibromofluoromethane
70-13095 %Toluene-d8
This report should not be reproduced, except in its entirety, without the written consent of Waypoint Analytical.
449 Springbrook Road - P.O. Box 240543 - Charlotte, NC 28224-0543
Phone: [phone] - Toll Free Number: 1-800/529-6364 - Fax: [phone] Page 9 of 19
Laboratory Report
06/10/2020
ResultParameter Batch
ID
Report
Limit
Analysis
Date/Time
MethodDilution
Factor
Units MDL Analyst
3200 Gateway Centre Blvd. Suite 100
Project: CRH GNCKleinfelder SE, Inc. (Morrisville)
Morrisville, NC 27560
Attn: Mike Burns
Sample Matrix: Water
Client Sample ID: MW-2S
Sample ID: 0060843-06
Work Order: 0060843
Time Collected: 06/01/20 16:10
Time Submitted: 06/04/20 15:45
Volatile Organic 602 Compounds by GC/MS
3100 SM6200 B P0F0832100506/5/20 15:09 JLBug/L 4.8Benzene
2400 SM6200 B P0F08321001006/5/20 15:09 JLBug/L 6.1Ethylbenzene
29 SM6200 B P0F08321005006/5/20 15:09 JLBJug/L 5.0Isopropyl Ether
1700 SM6200 B P0F08321002006/5/20 15:09 JLBug/L 12m,p-Xylenes
52 SM6200 B P0F08321005006/5/20 15:09 JLBJug/L 4.2Methyl-tert-Butyl Ether
180 SM6200 B P0F08321005006/5/20 15:09 JLBJug/L 19Naphthalene
220 SM6200 B P0F08321001006/5/20 15:09 JLBug/L 4.4o-Xylene
120 SM6200 B P0F08321001006/5/20 15:09 JLBug/L 4.4Toluene
1900 SM6200 B P0F08321003006/5/20 15:09 JLBug/L 15Xylenes, total
Surrogate Recovery Control Limits
70-13095 %4-Bromofluorobenzene
70-13092 %Dibromofluoromethane
70-13096 %Toluene-d8
This report should not be reproduced, except in its entirety, without the written consent of Waypoint Analytical.
449 Springbrook Road - P.O. Box 240543 - Charlotte, NC 28224-0543
Phone: [phone] - Toll Free Number: 1-800/529-6364 - Fax: [phone] Page 10 of 19
Laboratory Report
06/10/2020
ResultParameter Batch
ID
Report
Limit
Analysis
Date/Time
MethodDilution
Factor
Units MDL Analyst
3200 Gateway Centre Blvd. Suite 100
Project: CRH GNCKleinfelder SE, Inc. (Morrisville)
Morrisville, NC 27560
Attn: Mike Burns
Sample Matrix: Water
Client Sample ID: MW-11D
Sample ID: 0060843-07
Work Order: 0060843
Time Collected: 06/02/20 10:30
Time Submitted: 06/04/20 15:45
Volatile Organic 602 Compounds by GC/MS
48 SM6200 B P0F083210.50 6/5/20 20:04 JLBug/L 0.048Benzene
BRL SM6200 B P0F083211.0 6/5/20 20:04 JLBug/L 0.061Ethylbenzene
81 SM6200 B P0F083215.0 6/5/20 20:04 JLBug/L 0.050Isopropyl Ether
BRL SM6200 B P0F083212.0 6/5/20 20:04 JLBug/L 0.12m,p-Xylenes
360 SM6200 B P0F083210506/5/20 20:29 JLBug/L 0.42Methyl-tert-Butyl Ether
5.8 SM6200 B P0F083215.0 6/5/20 20:04 JLBug/L 0.19Naphthalene
1.9 SM6200 B P0F083211.0 6/5/20 20:04 JLBug/L 0.044o-Xylene
BRL SM6200 B P0F083211.0 6/5/20 20:04 JLBug/L 0.044Toluene
1.9 SM6200 B P0F083213.0 6/5/20 20:04 JLBJug/L 0.15Xylenes, total
Surrogate Recovery Control Limits
70-13095 %4-Bromofluorobenzene
70-13091 %Dibromofluoromethane
70-13095 %Toluene-d8
This report should not be reproduced, except in its entirety, without the written consent of Waypoint Analytical.
449 Springbrook Road - P.O. Box 240543 - Charlotte, NC 28224-0543
Phone: [phone] - Toll Free Number: 1-800/529-6364 - Fax: [phone] Page 11 of 19
Laboratory Report
06/10/2020
ResultParameter Batch
ID
Report
Limit
Analysis
Date/Time
MethodDilution
Factor
Units MDL Analyst
3200 Gateway Centre Blvd. Suite 100
Project: CRH GNCKleinfelder SE, Inc. (Morrisville)
Morrisville, NC 27560
Attn: Mike Burns
Sample Matrix: Water
Client Sample ID: MW-34
Sample ID: 0060843-08
Work Order: 0060843
Time Collected: 06/02/20 12:17
Time Submitted: 06/04/20 15:45
Volatile Organic 602 Compounds by GC/MS
BRL SM6200 B P0F085410.50 6/8/20 13:13 JLBug/L 0.048Benzene
BRL SM6200 B P0F085411.0 6/8/20 13:13 JLBug/L 0.061Ethylbenzene
BRL SM6200 B P0F085415.0 6/8/20 13:13 JLBug/L 0.050Isopropyl Ether
0.62 SM6200 B P0F085412.0 6/8/20 13:13 JLBJug/L 0.12m,p-Xylenes
BRL SM6200 B P0F085415.0 6/8/20 13:13 JLBug/L 0.042Methyl-tert-Butyl Ether
9.1 SM6200 B P0F085415.0 6/8/20 13:13 JLBug/L 0.19Naphthalene
2.6 SM6200 B P0F085411.0 6/8/20 13:13 JLBug/L 0.044o-Xylene
BRL SM6200 B P0F085411.0 6/8/20 13:13 JLBug/L 0.044Toluene
3.3 SM6200 B P0F085413.0 6/8/20 13:13 JLBug/L 0.15Xylenes, total
Surrogate Recovery Control Limits
70-13093 %4-Bromofluorobenzene
70-13091 %Dibromofluoromethane
70-13094 %Toluene-d8
This report should not be reproduced, except in its entirety, without the written consent of Waypoint Analytical.
449 Springbrook Road - P.O. Box 240543 - Charlotte, NC 28224-0543
Phone: [phone] - Toll Free Number: 1-800/529-6364 - Fax: [phone] Page 12 of 19
Laboratory Report
06/10/2020
ResultParameter Batch
ID
Report
Limit
Analysis
Date/Time
MethodDilution
Factor
Units MDL Analyst
3200 Gateway Centre Blvd. Suite 100
Project: CRH GNCKleinfelder SE, Inc. (Morrisville)
Morrisville, NC 27560
Attn: Mike Burns
Sample Matrix: Water
Client Sample ID: MW-17
Sample ID: 0060843-09
Work Order: 0060843
Time Collected: 06/02/20 14:10
Time Submitted: 06/04/20 15:45
Volatile Organic 602 Compounds by GC/MS
4100 SM6200 B P0F0832100506/5/20 18:51 JLBug/L 4.8Benzene
2300 SM6200 B P0F08321001006/5/20 18:51 JLBug/L 6.1Ethylbenzene
630 SM6200 B P0F08321005006/5/20 18:51 JLBug/L 5.0Isopropyl Ether
570 SM6200 B P0F08321002006/5/20 18:51 JLBug/L 12m,p-Xylenes
3500 SM6200 B P0F08321005006/5/20 18:51 JLBug/L 4.2Methyl-tert-Butyl Ether
420 SM6200 B P0F08321005006/5/20 18:51 JLBJug/L 19Naphthalene
BRL SM6200 B P0F08321001006/5/20 18:51 JLBug/L 4.4o-Xylene
39 SM6200 B P0F08321001006/5/20 18:51 JLBJug/L 4.4Toluene
570 SM6200 B P0F08321003006/5/20 18:51 JLBug/L 15Xylenes, total
Surrogate Recovery Control Limits
70-13096 %4-Bromofluorobenzene
70-13092 %Dibromofluoromethane
70-13096 %Toluene-d8
This report should not be reproduced, except in its entirety, without the written consent of Waypoint Analytical.
449 Springbrook Road - P.O. Box 240543 - Charlotte, NC 28224-0543
Phone: [phone] - Toll Free Number: 1-800/529-6364 - Fax: [phone] Page 13 of 19
Laboratory Report
06/10/2020
ResultParameter Batch
ID
Report
Limit
Analysis
Date/Time
MethodDilution
Factor
Units MDL Analyst
3200 Gateway Centre Blvd. Suite 100
Project: CRH GNCKleinfelder SE, Inc. (Morrisville)
Morrisville, NC 27560
Attn: Mike Burns
Sample Matrix: Water
Client Sample ID: MW-27
Sample ID: 0060843-10
Work Order: 0060843
Time Collected: 06/02/20 15:32
Time Submitted: 06/04/20 15:45
Volatile Organic 602 Compounds by GC/MS
2800 SM6200 B P0F0832100506/5/20 16:22 JLBug/L 4.8Benzene
59 SM6200 B P0F08321001006/5/20 16:22 JLBJug/L 6.1Ethylbenzene
BRL SM6200 B P0F08321005006/5/20 16:22 JLBug/L 5.0Isopropyl Ether
87 SM6200 B P0F08321002006/5/20 16:22 JLBJug/L 12m,p-Xylenes
86 SM6200 B P0F08321005006/5/20 16:22 JLBJug/L 4.2Methyl-tert-Butyl Ether
190 SM6200 B P0F08321005006/5/20 16:22 JLBJug/L 19Naphthalene
88 SM6200 B P0F08321001006/5/20 16:22 JLBJug/L 4.4o-Xylene
560 SM6200 B P0F08321001006/5/20 16:22 JLBug/L 4.4Toluene
180 SM6200 B P0F08321003006/5/20 16:22 JLBJug/L 15Xylenes, total
Surrogate Recovery Control Limits
70-13093 %4-Bromofluorobenzene
70-13093 %Dibromofluoromethane
70-13095 %Toluene-d8
This report should not be reproduced, except in its entirety, without the written consent of Waypoint Analytical.
449 Springbrook Road - P.O. Box 240543 - Charlotte, NC 28224-0543
Phone: [phone] - Toll Free Number: 1-800/529-6364 - Fax: [phone] Page 14 of 19
Laboratory Report
06/10/2020
ResultParameter Batch
ID
Report
Limit
Analysis
Date/Time
MethodDilution
Factor
Units MDL Analyst
3200 Gateway Centre Blvd. Suite 100
Project: CRH GNCKleinfelder SE, Inc. (Morrisville)
Morrisville, NC 27560
Attn: Mike Burns
Sample Matrix: Water
Client Sample ID: Trip Blank
Sample ID: 0060843-11
Work Order: 0060843
Time Collected: 06/02/20 00:00
Time Submitted: 06/04/20 15:45
Volatile Organic 602 Compounds by GC/MS
BRL SM6200 B P0F083210.50 6/5/20 14:19 JLBug/L 0.048Benzene
BRL SM6200 B P0F083211.0 6/5/20 14:19 JLBug/L 0.061Ethylbenzene
BRL SM6200 B P0F083215.0 6/5/20 14:19 JLBug/L 0.050Isopropyl Ether
BRL SM6200 B P0F083212.0 6/5/20 14:19 JLBug/L 0.12m,p-Xylenes
BRL SM6200 B P0F083215.0 6/5/20 14:19 JLBug/L 0.042Methyl-tert-Butyl Ether
BRL SM6200 B P0F083215.0 6/5/20 14:19 JLBug/L 0.19Naphthalene
BRL SM6200 B P0F083211.0 6/5/20 14:19 JLBug/L 0.044o-Xylene
BRL SM6200 B P0F083211.0 6/5/20 14:19 JLBug/L 0.044Toluene
BRL SM6200 B P0F083213.0 6/5/20 14:19 JLBug/L 0.15Xylenes, total
Surrogate Recovery Control Limits
70-13094 %4-Bromofluorobenzene
70-13092 %Dibromofluoromethane
70-13095 %Toluene-d8
This report should not be reproduced, except in its entirety, without the written consent of Waypoint Analytical.
449 Springbrook Road - P.O. Box 240543 - Charlotte, NC 28224-0543
Phone: [phone] - Toll Free Number: 1-800/529-6364 - Fax: [phone] Page 15 of 19
6/10/20
Level II QC Report
3200 Gateway Centre Blvd. Suite 100
Project: CRH GNCKleinfelder SE, Inc. (Morrisville)
Morrisville, NC 27560
Attn: Mike Burns
Work Order: 0060843
Time Submitted: 6/4/2020 3:45:00PM
Result Limit
Reporting
Units Level
Spike
Result
Source
%REC
%REC
Limits RPD
RPD
Limit Notes Analyte
Volatile Organic 602 Compounds by GC/MS - Quality Control
Batch P0F0832 - SM6200 B
Blank (P0F0832-BLK1)Prepared & Analyzed: 06/05/20
Benzene ug/LBRL0.50
Ethylbenzene ug/LBRL1.0
Isopropyl Ether ug/LBRL5.0
m,p-Xylenes ug/LBRL2.0
Methyl-tert-Butyl Ether ug/LBRL5.0
Naphthalene ug/L0.230 5.0 J
o-Xylene ug/LBRL1.0
Toluene ug/LBRL1.0
Xylenes, total ug/LBRL3.0
ug/L 50.00 70-130Surrogate: 4-Bromofluorobenzene 9447.2
ug/L 50.00 70-130Surrogate: Dibromofluoromethane 9245.9
ug/L 50.00 70-130Surrogate: Toluene-d8 9547.6
LCS (P0F0832-BS1)Prepared & Analyzed: 06/05/20
Benzene ug/L21.0 0.50 20.00 70-130105
Ethylbenzene ug/L19.7 1.0 20.00 70-13099
Isopropyl Ether ug/L21.0 5.0 20.00 70-130105
m,p-Xylenes ug/L42.0 2.0 40.00 70-130105
Methyl-tert-Butyl Ether ug/L20.5 5.0 20.00 70-130102
Naphthalene ug/L18.5 5.0 20.00 70-13092
o-Xylene ug/L19.8 1.0 20.00 70-13099
Toluene ug/L21.2 1.0 20.00 70-130106
Xylenes, total ug/L61.8 3.0 60.00 70-130103
ug/L 50.00 70-130Surrogate: 4-Bromofluorobenzene 9446.8
ug/L 50.00 70-130Surrogate: Dibromofluoromethane 9145.5
ug/L 50.00 70-130Surrogate: Toluene-d8 9547.7
Matrix Spike (P0F0832-MS1)Prepared & Analyzed: 06/05/20 Source: 0060843-07
Benzene ug/L2535.0 200.0 47.6 70-130103
Ethylbenzene ug/L19810 200.0 BRL 70-13099
Isopropyl Ether ug/L28450 200.0 80.8 70-130102
m,p-Xylenes ug/L42020 400.0 BRL 70-130105
Methyl-tert-Butyl Ether ug/L54650 200.0 358 70-13094
Naphthalene ug/L18750 200.0 5.85 70-13090
o-Xylene ug/L19910 200.0 1.94 70-13099
Toluene ug/L21210 200.0 BRL 70-130106
Xylenes, total ug/L61930 600.0 1.94 70-130103
ug/L 50.00 70-130Surrogate: 4-Bromofluorobenzene 9246.2
ug/L 50.00 70-130Surrogate: Dibromofluoromethane 9246.2
ug/L 50.00 70-130Surrogate: Toluene-d8 9547.4
This report should not be reproduced, except in its entirety, without the written consent of Waypoint Analytical.
449 Springbrook Road - P.O. Box 240543 - Charlotte, NC 28224-0543
Phone: [phone] - Toll Free Number: 1-800/529-6364 - Fax: [phone] Page 16 of 19
6/10/20
Level II QC Report
3200 Gateway Centre Blvd. Suite 100
Project: CRH GNCKleinfelder SE, Inc. (Morrisville)
Morrisville, NC 27560
Attn: Mike Burns
Work Order: 0060843
Time Submitted: 6/4/2020 3:45:00PM
Result Limit
Reporting
Units Level
Spike
Result
Source
%REC
%REC
Limits RPD
RPD
Limit Notes Analyte
Volatile Organic 602 Compounds by GC/MS - Quality Control
Batch P0F0832 - SM6200 B
Matrix Spike Dup (P0F0832-MSD1)Prepared & Analyzed: 06/05/20 Source: 0060843-07
Benzene ug/L2485.0 200.0 47.6 2070-130100 2
Ethylbenzene ug/L19610 200.0 BRL 2070-13098 1
Isopropyl Ether ug/L28250 200.0 80.8 2070-130100 0.8
m,p-Xylenes ug/L41720 400.0 BRL 2070-130104 0.8
Methyl-tert-Butyl Ether ug/L54450 200.0 358 2070-13093 0.4
Naphthalene ug/L19850 200.0 5.85 2070-13096 6
o-Xylene ug/L20210 200.0 1.94 2070-130100 1
Toluene ug/L20710 200.0 BRL 2070-130104 2
Xylenes, total ug/L61830 600.0 1.94 2070-130103 0.1
ug/L 50.00 70-130Surrogate: 4-Bromofluorobenzene 9547.3
ug/L 50.00 70-130Surrogate: Dibromofluoromethane 8944.6
ug/L 50.00 70-130Surrogate: Toluene-d8 9647.9
Batch P0F0854 - SM6200 B
Blank (P0F0854-BLK1)Prepared & Analyzed: 06/08/20
Benzene ug/LBRL0.50
Ethylbenzene ug/LBRL1.0
Isopropyl Ether ug/LBRL5.0
m,p-Xylenes ug/LBRL2.0
Methyl-tert-Butyl Ether ug/LBRL5.0
Naphthalene ug/LBRL5.0
o-Xylene ug/LBRL1.0
Toluene ug/LBRL1.0
Xylenes, total ug/LBRL3.0
ug/L 50.00 70-130Surrogate: 4-Bromofluorobenzene 9346.4
ug/L 50.00 70-130Surrogate: Dibromofluoromethane 9045.0
ug/L 50.00 70-130Surrogate: Toluene-d8 9346.6
This report should not be reproduced, except in its entirety, without the written consent of Waypoint Analytical.
449 Springbrook Road - P.O. Box 240543 - Charlotte, NC 28224-0543
Phone: [phone] - Toll Free Number: 1-800/529-6364 - Fax: [phone] Page 17 of 19
6/10/20
Level II QC Report
3200 Gateway Centre Blvd. Suite 100
Project: CRH GNCKleinfelder SE, Inc. (Morrisville)
Morrisville, NC 27560
Attn: Mike Burns
Work Order: 0060843
Time Submitted: 6/4/2020 3:45:00PM
Result Limit
Reporting
Units Level
Spike
Result
Source
%REC
%REC
Limits RPD
RPD
Limit Notes Analyte
Volatile Organic 602 Compounds by GC/MS - Quality Control
Batch P0F0854 - SM6200 B
LCS (P0F0854-BS1)Prepared & Analyzed: 06/08/20
Benzene ug/L21.3 0.50 20.00 70-130106
Ethylbenzene ug/L19.9 1.0 20.00 70-130100
Isopropyl Ether ug/L20.8 5.0 20.00 70-130104
m,p-Xylenes ug/L42.3 2.0 40.00 70-130106
Methyl-tert-Butyl Ether ug/L21.0 5.0 20.00 70-130105
Naphthalene ug/L19.3 5.0 20.00 70-13097
o-Xylene ug/L20.0 1.0 20.00 70-130100
Toluene ug/L21.2 1.0 20.00 70-130106
Xylenes, total ug/L62.3 3.0 60.00 70-130104
ug/L 50.00 70-130Surrogate: 4-Bromofluorobenzene 9245.9
ug/L 50.00 70-130Surrogate: Dibromofluoromethane 9044.8
ug/L 50.00 70-130Surrogate: Toluene-d8 9547.6
Sample Extraction Data
Prep Method: SM6200 B
Lab Number Batch Date/TimeInitialFinal
P0F08320060843-01 06/05/20 10:0010 10mL mL
P0F08320060843-02 06/05/20 10:0010 10mL mL
P0F08320060843-03 06/05/20 10:0010 10mL mL
P0F08320060843-04 06/05/20 10:0010 10mL mL
P0F08320060843-05 06/05/20 10:0010 10mL mL
P0F08320060843-06 06/05/20 10:0010 10mL mL
P0F08320060843-07 06/05/20 10:0010 10mL mL
P0F08320060843-07 06/05/20 10:0010 10mL mL
P0F08540060843-08 06/08/20 10:0010 10mL mL
P0F08320060843-09 06/05/20 10:0010 10mL mL
P0F08320060843-10 06/05/20 10:0010 10mL mL
P0F08320060843-11 06/05/20 10:0010 10mL mL
This report should not be reproduced, except in its entirety, without the written consent of Waypoint Analytical.
449 Springbrook Road - P.O. Box 240543 - Charlotte, NC 28224-0543
Phone: [phone] - Toll Free Number: 1-800/529-6364 - Fax: [phone] Page 18 of 19
Page 19 of 19