22008 CLT Aircraft Assessment WP-Approval 20180828

August 28, 2018 Sent Via E-mail
Kaitlyn Rhonehouse, PE
Geosyntec Consultants of NC 2501 Blue Ridge Road, Suite 430 Raleigh, NC 27607
Subject: Work Plan Approval Charlotte Aircraft 7705 E WT Harris Boulevard Charlotte, Mecklenburg County Brownfields Project Number 22008-18-060
Dear Mrs. Rhonehouse, On August 24, 2018, the Department of Environmental Quality (DEQ) Brownfields Program received the Work Plan for Brownfields Agreement & Redevelopment: Groundwater, Soil & Soil
Gas Assessment dated August 24, 2018 (Work Plan) for the above referenced Brownfields Property. DEQ Brownfields reviewed this document and determined that comments made by DEQ Brownfields to previous versions of this work plan have been incorporated as requested. Therefore, DEQ Brownfields approves the Work Plan.
Please be advised that this approval from DEQ Brownfields does not waive any applicable requirement to obtain any necessary permits, licenses or certifications which may be required from other state or local entities. If you have questions about this correspondence or require additional information, please feel free to contact me by phone at 704/661-0330 or by email at [e-mail].
Sincerely, Carolyn Minnich
Carolyn Minnich
Brownfields Project Manager ec: Keith Saieed, [e-mail]
Geosyntec Consultants of NC, PC
2501 Blue Ridge Road, Suite 430
Raleigh, North Carolina 27607
PH 919.870.0576
www.geosyntec.com

GN6502/20180824 Harris BLVD WP Rev1 FINAL

24 August 2018
Ms. Carolyn Minnich
Brownfields Project Manager
North Carolina Department of Environmental Quality
1646 Mail Service Center
Raleigh, NC 27699-1646
Subject: Work Plan for Brownfields Agreement and Redevelopment:
Groundwater, Soil, and Soil Gas Assessment – Revision 1
Site: Former Charlotte Aircraft #3 7705 East WT Harris Boulevard
Charlotte, Mecklenburg County, North Carolina
Mecklenburg County Parcel ID 10915107
NCDEQ Brownfields Project No 22008-18-060
NCDEQ IHSB Site ID NONCD0001478
Dear Ms. Minnich:
Geosyntec Consultants of NC, PC (Geosyntec), on behalf of our client, K Sade Ventures, LLC
(K Sade or “Client”) has prepared this revised Work Plan for the above-referenced former
Charlotte Aircraft #3 in Charlotte, North Carolina (“Site”). The Charlotte Aircraft Corporation
(CAC) is the current Site property owner. K Sade is under contract with the CAC to purchase
the property and redevelop the Site under the North Carolina Department of Environmental
Quality (NCDEQ) Brownfields Program (NCBP) for multi-family residential use. As such, K
Sade submitted a Brownfields Property Application (BPA) to the NCDEQ on 22 January 2018
as the Site Prospective Developer (PD). The Site was accepted into the Program in a 22 February
2018 Letter of Eligibility (LOE). The Site has undergone environmental assessment and
remediation by others, dating back to March 2000, including soil assessment and remediation,
groundwater monitoring, and soil gas sampling. However, environmental data gaps remain. This
Work Plan is intended to collect additional data to establish baseline conditions and address the
environmental data gaps. We look forward to your review and approval of this Work Plan.

Sincerely,

Kaitlyn Rhonehouse, PE
Senior Engineer

Prepared for
K Sade Ventures, LLC
1800 Eastwood Road, Suite 114
Wilmington, North Carolina 28403

WORK PLAN FOR
BROWNFIELDS AGREEMENT AND
REDEVELOPMENT:
GROUNDWATER, SOIL, AND SOIL GAS
ASSESSMENT – REVISION 1
FORMER CHARLOTTE AIRCRAFT
CORPORATION, CHARLOTTE, NC
NCDEQ BROWNFIELDS PROJECT No 22008-18-060

Prepared by

Geosyntec Consultants of NC, PC
2501 Blue Ridge Road, Suite 430
Raleigh, North Carolina 27607
Project Number GN6502
August 2018

TABLE OF CONTENTS
1. INTRODUCTION .................................................................................................1 
2. BACKGROUND ...................................................................................................2 
3. ENVIRONMENTAL SITE HISTORY .................................................................4 
4. HISTORICAL GROUNDWATER SAMPLING REVIEW .................................8 
5. PROPOSED SUPPLEMENTAL ASSESSMENT ..............................................11 
5.1 Groundwater Sampling ...............................................................................12 
5.2 Soil Sampling .............................................................................................13 
5.3 Soil Gas Sampling ......................................................................................13 
6. ASSESSMENT PROCEDURES .........................................................................15 
6.1. Groundwater Assessment ...........................................................................15 
6.2. Soil Assessment ..........................................................................................16 
6.3. Vapor Intrusion Assessment .......................................................................16 
7. PROPOSED PATH FORWARD ........................................................................19 
8. REFERENCES ....................................................................................................20 

LIST OF TABLES

Table 1 Historical Groundwater Analytical Data Summary

LIST OF FIGURES

Figure 1 Site Location
Figure 2 Site Layout
Figure 3 Historical Groundwater Results
Figure 4 Proposed Groundwater Sampling Locations
Figure 5 Proposed Soil Sampling Locations
Figure 6 Proposed Soil Gas Sampling Locations
Figure 7 Soil Gas Probe Construction Detail
Figure 8 Soil Gas Sampling Assembly

TABLE OF CONTENTS (Continued)
GN6502/20180824 Harris BLVD WP Rev1 FINAL ii 8/24/2018

LIST OF APPENDICES

Appendix A 2017 NCDEQ IHSB Priority Delisting Memorandum
Appendix B 1998 Leaking UST Reporting Form
Appendix C 2000 Duke Engineering Source Area Remedy Report (Figure 5 and Figure 6)

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1. INTRODUCTION
Geosyntec Consultants of NC, PC (Geosyntec), on behalf of K Sade Ventures, LLC (K
Sade or “Client”), has prepared this Groundwater, Soil, and Soil Gas Assessment Work
Plan – Revision 1 (Work Plan) for the former Charlotte Aircraft #3 facility located at
7705 East W.T. Harris Boulevard in Charlotte, North Carolina (“Site”). The Charlotte
Aircraft Corporation (CAC) is the current Site property owner. K Sade is under contract
with the CAC to purchase the property and redevelop the Site for multi-family residential
use, in the form of apartment buildings. K Sade intends to redevelop the Site in accordance
with, and under the environmental protections provided by, the North Carolina
Department of Environmental Quality (NCDEQ) Brownfields Program (NCBP). As such,
K Sade retained Geosyntec to guide the environmental efforts to achieve a finalized
Brownfields Agreement (BFA) for the Site.

K Sade submitted a Brownfields Property Application (BPA) to the NCDEQ on 22
January 2018 as the Site Prospective Developer (PD); the Site was accepted into the
Program in a 22 February 2018 Letter of Eligibility (LOE). On 6 March 2018, Geosyntec,
K Sade, and the NCDEQ (Ms. Carolyn Minnich) discussed a proposed path forward to
obtain a BFA. The NCDEQ indicated the next step in the BFA process is the preparation
and submittal of an environmental assessment work plan, which should include a review
of pertinent Site-related historical data. Thus, this Work Plan presents the results of a Site
historical review and presents proposed assessment activities to address the remaining
Site-related environmental data gaps and establish baseline environmental conditions for
the Site. The completion of the work presented herein is intended to support issuance of a
finalized BFA and facilitate Site redevelopment. The Work Plan will support this
endeavor through the collection of additional groundwater, soil, and soil gas data.

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2. BACKGROUND
The Charlotte Aircraft Site is located in Mecklenburg County, Charlotte, North Carolina
(Figure 1) and consists of three adjoining properties totaling nearly 27 acres, subdivided
in three parcels as outlined in the inset table below. For the purposes of the BFA, the
Brownfields Site consists of one parcel where the source of contamination was identified
and environmental impacts remain. The two outstanding parcels are not part of the
Brownfields Site but are associated with the CAC. The other parcels may be added to the
Brownfields Site at a later date.
Mecklenburg County
Parcel Identification
Areal
Footprint
Description
10915107 8.32 acres
Brownfields Property: 7705 East WT Harris Boulevard;
former source contamination located on this property;
northwestern parcel in relation to the adjoining Site-related
parcels.
10915106 12.18 acres Located south of source contamination property; ancillary
property used to support facility operations; not included in
BFA; referred to as the Southern Parcel.
10915110 6.45 acres Located east of source contamination property; ancillary
property used to support facility operations; not included in
BFA; referred to as the Eastern Parcel.

Each of these three parcels are planned for redevelopment; though the northwestern
parcel located at 7705 East WT Harris Boulevard (i.e., Parcel 10915107) will be the
property listed in the BFA. The two adjoining Site-associated parcels (i.e., Parcel
10915106 and 10915110) are included in the Site historical review but will not be
included in the Site BFA. The property south and east of the Brownfields Property are
referred to herein as the Southern Parcel (Parcel 10915106) and Eastern Parcel (Parcel
10915110), respectively. The Site currently consists of warehouses, workshops, storage
buildings, storage sheds, outdoor storage racks, and offices. With the exception of paved
interior roads, the Site is primarily unpaved. The majority of the Site is unused; however,
discrete areas are currently used by the CAC for its aircraft parts supply business. No
supply wells are located at the Site and the property is connected to a municipal water
source. The Site and two Site-related parcels are shown on Figure 2.
The Site is located in a predominantly residential area and is bordered to the south and
east by CAC property, to the west by East W.T. Harris Boulevard, and to the north by
Delta Landing Road. Residential properties are located in each direction in extended off-
Site areas beyond the immediate CAC property and East W.T. Harris Boulevard. Hickory

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Grove Christian School is located north of the Site, and north and west of East W.T.
Harris Boulevard.
Between July and November 2000, Duke Engineering and Services (Duke Engineering)
submitted multiple reports to NCDEQ to conduct a Site source area soil investigation and
remedy. The Duke Engineering reports (i.e., the 23 July 2000 Source Area Remediation
Report and the 16 November 2000 Groundwater Corrective Action Plan) provide the
basis for much of the Site background presented herein.
The Site formerly operated as an aircraft parts refurbishing facility since the 1950s.
Chlorinated solvents, including trichloroethene (TCE), were used for parts washing and
stripping to support facility operations. Tetrachloroethene (PCE) was not explicitly
identified in historical reports as a chemical used to support the Site cleaning operations;
however, detections of PCE in Site groundwater suggest PCE may also have been used
at the Site. Volatile organic compounds (VOCs) were originally identified in groundwater
as part of a 1995 Initial Limited Site Assessment (LSA); the impacts were reportedly due
to leaks emanating from a washdown pad and sump area on Site. Assessment and
remedial activities were conducted since 1995 on behalf of the CAC. Based on a review
of NCDEQ’s Laserfiche online database, the Site appears to have been associated with
the NCDEQ Inactive Hazardous Sites Branch (IHSB) since at least 2000.
A source area soil excavation was performed in 2000 to remediate free product TCE
impacts in Site soils. A chlorinated VOC groundwater plume emanating from the former
source area is present on-Site and extends to the west of the Site beneath W.T. Harris
Boulevard. Several intrusive groundwater remedial approaches have been proposed for
the Site, though active remedial methods have not been implemented. This is largely a
result of financial hardships for the CAC. The Site underwent passive remediation, in the
form of Monitored Natural Attenuation (MNA), for 10 years between 2001 and 2011.
During that time, groundwater monitoring was conducted semi-annually; groundwater
monitoring has progressed sporadically since, most recently performed in November
2016. In February 2016, the CAC requested assistance from the NCDEQ in funding the
Site investigation, including to support the continued groundwater investigation and soil
gas assessment. Based upon recent groundwater sampling and nearby receptor data, the
Site was removed from the IHSB Priority List as indicated in a 9 March 2017 NCDEQ
memorandum (Appendix A). Historical environmental assessment and remediation
activities are discussed in more detail in Section 3.

GN6502/20180824 Harris BLVD WP Rev1 FINAL 4 8/24/2018
3. ENVIRONMENTAL SITE HISTORY
This section provides a comprehensive summary of previous assessment activities
conducted at the Site by others and includes testing of various media including soil, soil
gas, and groundwater. Therefore, while this Work Plan is focused on assessing
groundwater quality and soil gas impacts at the Site, a discussion of prior assessments
and identified impacts as they pertain to other media is included to present a full Site
history.
The Charlotte Aircraft Site is part of an original 43-acre tract formerly known as the
“Delta Airbase”. Prior to 1952, Delta Airbase was used by United Aero Service as a flight
training school and aircraft maintenance facility. Chlorinated solvents, particularly TCE,
were used in the 1950’s and 1960’s as part of material washing operations conducted on
a part washdown pad at Building 23 (Figure 2). In October 1994, T.E. Scott Construction
completed a Phase I Environmental Site Assessment (ESA) for the Site to support a
pending property ownership transfer. The 1994 Phase I ESA reported the removal of a
6,000-gallon gasoline underground storage tank (UST) in 1989; elevated levels of total
petroleum hydrocarbons (TPH) were detected in Site soils during the removal. On 26
August 1991, the NCDEQ UST Section provided a No Further Action (NFA) notice as
TPH concentrations in soil were reduced below action limits. In 1995, two aviation fuel
USTs and surrounding petroleum-impacted soil were removed from the adjacent Eastern
Parcel; the release was identified as NCDEQ UST Incident 19164. The locations of the
former gasoline and aviation fuel USTs1 are shown on Figure 2. On 29 October 1998
NCDEQ filed a No Further Action (NFA) notice for UST Incident 19164 following the
submission of a 27 October 1998 Limited Site Assessment (LSA).
Groundwater analytical data collected as part of the 1998 UST LSA identified “low”
concentrations of chlorinated solvents in several on-Site monitoring wells. The 1998 LSA
was not located; thus, specific solvent concentrations in Site groundwater could not be
reviewed. Nonetheless, in response to these findings a Comprehensive Site Assessment
(CSA) (13 October 1999) was performed to assess the nature and extent of the chlorinated
solvent groundwater contamination and attempt to identify a source of the solvent
impacts. The CSA was not located on Laserfiche or reviewed; however, subsequent
reports reference the CSA document. The CSA report reportedly identified a TCE source
in an underground concrete sump, co-located with the parts washdown pad. The pad was
located 5 feet below ground surface (ft bgs). The bottom of the sump extended 11 ft bgs,
and free product TCE impacts were identified at the base of the sump.

1 Former UST locations are based on the 1995 UST Leak Reporting Form (Appendix B).

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In response to the CSA, Duke Engineering oversaw the source area soil remediation, as
documented in the 23 July 2000 Source Area Remediation Report (Source Area Remedy
Report). The source area soil excavation extended 16-feet wide, 13-feet long, and 22-feet
deep (the vertical extent of the excavation ceased at the limits of the track-hoe
equipment). The top 5 feet of soil was reportedly unimpacted and used as on-Site backfill
material. The excavated soil was treated thermally on-Site; nearly 140 tons of TCE-
impacted soil was treated.
The approximate source excavation footprint is shown on Figure 5 and Figure 6 of the
Source Area Remedy Report (Appendix C); confirmation soil sample locations and
analytical results are provided on the figure. Both fixed-based and on-Site mobile
laboratory confirmation soil samples were collected from the excavation side-walls (7 to
20 ft bgs) and base (22 ft bgs). TCE was detected in the post-excavation side-wall mobile
laboratory samples at concentrations ranging between 477 parts per million (ppm) and
613 ppm at shallow to intermediate depths (8 ft bgs to 11 ft bgs), respectively. TCE was
also detected in mobile laboratory samples in deep soil, up to 583 ppm 20 ft bgs. TCE
was detected in fixed-base laboratory confirmation samples at concentrations ranging
from 0.15 parts per million (ppm) to 8.1 ppm. TCE concentrations were generally order(s)
of magnitude less in fixed-based analytical samples in relation to the TCE concentrations
identified by the on-Site mobile laboratory. The majority of collected samples exceed
the current NCDEQ Unrestricted Use Preliminary Soil Remediation Goals (PSRG) for
TCE (0.87 ppm2; NCDEQ, February 2018); however, remaining impacts are located over
5 feet below land surface and are covered by clean fill. It is unclear if physical constraints
related to the Site layout or equipment prevented further excavation.
Following the Source Area Remediation Report submittal, Duke Engineering submitted
a subsequent Corrective Action Plan (CAP) on 16 November 2000 to address the
chlorinated solvent detections in groundwater. The CAP included the installation of a top-
of-bedrock recovery well (RW-1), as well as the collection of post source area remedy
soil samples to further evaluate the vertical extent of soil contamination. TCE was
detected in soil at concentrations below 1 ppm during the recovery well installation, dense
non-aqueous phase liquid (DNAPL) was not identified during drilling, and TCE was not
detected in groundwater above the 250 parts per billion (ppb) laboratory method detection

2 The unrestricted (i.e., residential use) screening level is presented for general reference only, as the
confirmation soil sampling depths were in a soil horizon well beyond the depths residential and/or
commercial occupants are expected to encounter. The current protection of groundwater PSRG is 0.021
ppm (NCDEQ, February 2018).

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limit (MDL). The CAP proposed MNA of groundwater, to include semi-annual
groundwater monitoring, beginning in February 2001.
In March 2003, Duke Engineering submitted a CAP Amendment to supplement the MNA
approach with an active groundwater remedial strategy. Specifically, the March 2003
CAP Amendment proposed to target chlorinated VOC impacts through the extraction and
off-Site disposal of groundwater from three deep wells (RW-1, DMW-2, and DMW-3).
However, there was no indication in subsequent reports that a groundwater extraction
remedial alternative was implemented. As such, an updated CAP Addendum was
submitted to NCDEQ in April 2004 to address the chlorinated VOC groundwater impacts.
In support of the 2004 CAP Addendum, several treatability studies (e.g., air sparge pilot
testing, in situ chemical oxidation bench scale testing) were performed to determine the
efficacy of different remedial alternatives. In response to the results of a March 2004
S&ME, Inc. (S&ME)3 air sparge pilot study, the 2004 CAP Addendum recommended
stand-alone air sparging to address the sub-surficial groundwater impacts and supplement
the passive MNA remedial alternative.
Shortly following the April 2004 CAP Addendum submittal, CAC requested permission
to delay the air-sparge implementation due to financial hardships. The original extension
request was submitted to NCDEQ on 20 May 2004; subsequent extension requests were
filed in March 2005 and May 2006. NCDEQ was initially amenable to the requests and
allowed semi-annual groundwater monitoring to continue until February 2011. However,
on 09 August 2011 NCDEQ submitted a letter to CAC determining that the MNA
approach was ineffective at remediating Site groundwater to acceptable levels, and an
active remedial alternative should be implemented. As such, the August 2011 NCDEQ
correspondence letter required the following: i) a revised remedial action plan should be
submitted and executed; ii) off-Site groundwater impacts be delineated and; iii) vapor
intrusion (VI) potential investigated for both on-Site and off-Site receptors. Meanwhile,
semi-annual groundwater ceased following the February 2011 sampling event. Beginning
in 2012, groundwater monitoring was performed biennially until 2016; the most recent
known sampling event was performed in November 2016.
On 08 April 2011, Mid-Atlantic Associates, Inc. (Mid-Atlantic) completed a VI Study
Report (VI Report) for the Site and two adjacent residential properties located within 100-
feet of the underlying groundwater plume. Mid-Atlantic collected sub-slab soil gas
samples in three on-Site buildings (the Guard House, Sales Office, and Main Office;
Figure 2). PCE in soil gas was detected up to 10 micrograms per cubic meter (µg/m3),

3 The March 2004 S&ME air sparge pilot study documentation was not submitted directly to NCDEQ;
however, the report is included as an appendix to the April 2004 Duke Engineering CAP Addendum.

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below the current NCDEQ IHSB Non-Residential Soil Gas Screening Level (SGSL)
(NCDEQ, February 2018) of 3,500 µg/m3. Other VOCs (e.g., ethylbenzene, xylenes)
were detected below their respective current non-residential SGSLs. A shallow
groundwater table at the off-Site properties prevented the collection of the soil-gas
samples; in response, indoor air crawlspace samples were collected beneath each off-Site
residence. PCE was also detected (0.58 µg/m3) in one off-Site crawl space sample, below
its current NCDEQ Residential Indoor Air Screening Level (IASL) of 8.3 µg/m3. The
Mid-Atlantic VI Report concluded that VI does not appear to be a concern for Site
occupants. As for off-Site residents, Mid-Atlantic concluded the VOC detections in crawl
space samples are likely unrelated to the groundwater plume and/or are of inconsequential
concern to off-Site residents. A 15 December 2011 NCDEQ correspondence letter
concurred that the soil gas concentrations on Site were below levels likely to pose a risk
to industrial occupants. However, the letter also requested additional off-Site VI
assessment to more appropriately understand off-Site VI risks. Geosyntec was unable to
identify a report or responses to comments related to the December 2011 NCDEQ letter
request.
CAC submitted a financial hardship letter in February 2016, at which point S&ME was
contracted by NCDEQ to continue the Site assessment, including monitoring well
installations and groundwater sampling. S&ME submitted an Environmental Assessment
Report in January 2017 (January 2017 ESR) to document the installation of two
monitoring wells (MW23 and DMW5) and groundwater sampling analytical results. The
results of the most recent groundwater sampling event are summarized briefly. Several
VOCs (e.g., PCE, TCE, 1,2-cis-dichloroethylene [cDCE]) were detected above the Title
15A North Carolina Administrative Code (NCAC) 2L Groundwater Standards (2L
Standards) in samples collected on the Brownfields Property (i.e., Parcel 10915107). One
monitoring well (MW-4) was sampled on the Eastern Parcel but VOCs were not detected
in the sample; there is at least one additional monitoring well (MW-3) on the Eastern
Parcel that was not sampled in November 2016. Geosyntec was unable to locate reports
documenting groundwater analytical data for the Southern Parcel.
Section 4 below provides additional detail of the semi-annual groundwater sampling
results for the Site. The findings summarized in Section 4 provide the rationale for the
proposed supplemental groundwater assessment approach discussed in Section 5.

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4. HISTORICAL GROUNDWATER SAMPLING REVIEW
Between 2001 and February 2011, various consultants oversaw semi-annual groundwater
sampling at the Site to support MNA; groundwater sampling continued on a biennial basis
between 2012 and 2016. The results of this extensive groundwater sampling effort are
summarized to provide a basis for the additional groundwater assessment proposed to
facilitate completion of the Site BFA. Groundwater is generally found at approximately
13 ft bgs to 18 ft bgs at the Site and groundwater flow is projected to be northwest.
Geosyntec compiled the known historical groundwater sampling analytical data and
refined the total data set to only include Site constituents of concern (COCs); the results
of this compilation and filtering process are provided in Table 1. Site COCs are defined
as constituents that exceeded a NCAC 2L Standards or Interim Maximum Allowable
Concentrations (IMACs) in at least one historical sampling event at any of the Site-
associated monitoring wells. For the Site groundwater COCs, analytical results are
presented for each sampling event to provide simple review of COC concentration trends
over time. Table 1 also identifies the historically highest detected concentration of each
COC with bold text to support the time trending comparisons. Figure 3 shows the
historically highest detected groundwater concentration and the most recent groundwater
concentration of PCE, TCE, and cDCE (these are the primary drivers for the existing
groundwater contaminant plume) at each of the identified Site-related monitoring wells.
Concentrations highlighted in yellow indicate an exceedance of the respective 2L
Standard. In addition, an inferred iso-contour line is shown on Figure 3, which
approximately outlines the extent of VOCs detected above one or more 2L standards
during the most recent groundwater sampling event.
It is worth reiterating that the iso-contour line includes all analyzed VOCs, not just PCE
and daughter products. This is especially notable in regard to MW-10, where PCE or
daughter products were not detected above a 2L Standard during the most recent event
(August 2010); however, benzene exceeded the 2L Standard in August 2010. In addition,
it is also worth noting that some of the analytical data used to estimate the iso-contour is
considerately old (e.g., the detection of PCE in MW-3 is from 1999). For this reason,
some of these monitoring wells without recent sampling data are proposed for resampling
(see discussion in Section 5 below on proposed groundwater sampling) to provide a more
up-to-date understanding of the groundwater plume on-Site.
The results summarized in Table 1 and Figure 3 indicate that, overall, the monitoring
wells that have retained the greatest COC impacts, predominately PCE and TCE, are deep
monitoring wells screened immediately above the top of bedrock (between 50 ft bgs and
60 ft bgs), likely within the relatively high permeability partially-weathered rock (PWR)

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layer of the aquifer. This primarily includes deep monitoring wells installed in the
immediate vicinity of the former source area (i.e., RW-1, DMW-2, DMW-3); though
COC impacts persist in DMW-4, a deep well installed near the Brownfield Site’s western
and downgradient property boundary (Figure 3). Overall, TCE concentrations in deep
wells appeared to increase with time from 1999 to the mid-to-late 2000s. The highest
observed concentrations in most monitoring wells (shallow and deep) with multiple
sampling events were between approximately 2004 and 2008. Since approximately 2008,
TCE concentrations have generally (with a few exceptions) shown a decreasing trend,
which is likely due to the effects of the source removal on groundwater quality. There are
also two deep monitoring wells installed off-Site, one upgradient of the former source
area (DMW-1) and a second on a downgradient property north of W.T. Harris Boulevard
(DMW-5); VOCs were not detected above the 2L Standards or IMACs in either well
during the most recent sampling event (November 2016).
Groundwater in the upper portions of the aquifer (i.e., between 5 ft bgs and 24 ft bgs) is
also impacted with Site COCs. Historically, elevated PCE and TCE impacts have been
identified in shallow monitoring well MW-12, located proximal to the former source area.
TCE was detected in MW-12 up to 5,400 micrograms per liter (µg/L) in August 2001.
Overall, TCE concentrations in MW-12 have shown a steady trend, most recently
detected at 3,950 µg/L in November 2016. TCE concentrations in downgradient shallow
wells MW-5 and MW-9 show a clearer downward trend through January 2014; this is
likely the reason neither MW-5 or MW-9 were sampled during S&ME’s November 2016
sampling event.
Most recently, S&ME collected groundwater samples from a sub-set of monitoring wells
as part of the January 2017 ESR. Groundwater was collected from the following nine
monitoring wells:
 Former source area monitoring wells: Shallow (MW-12) and Deep (RW-1 and
DMW-2);
 Upgradient monitoring wells: Shallow (MW-1, MW-4 [off-Site]) and Deep
(DMW-1); and
 Downgradient and off-Site monitoring wells: Shallow (MW-21 and MW-23) and
Deep (DMW-5).
The results from the most recent November 2016 groundwater sampling event indicate
elevated levels of several constituents, including PCE and TCE, in on-Site wells RW-1,
DMW-2, and MW-12. PCE was also detected above its 2L Standard in off-Site shallow

GN6502/20180824 Harris BLVD WP Rev1 FINAL 10 8/24/2018
well MW-21. No constituents exceeded the 2L groundwater standards or IMACs in MW-
1, MW-4, MW-23, DMW-1, or DMW-5.
The compilation and review of the historical groundwater sampling data is important to
understanding the current Site groundwater conditions and support a groundwater
sampling plan focused on Brownfields redevelopment. As such, this Work Plan proposes
to sample a subset of on-Site wells that are routinely sampled (e.g., MW-12 and DMW-
2), plus several wells that have not been sampled in several years (e.g., MW-9 and DMW-
4). A more specific rationale for proposed wells to sample is included in Section 5.

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5. PROPOSED SUPPLEMENTAL ASSESSMENT
Based on a review of readily available historical Site-related documents and discussions
with the NCDEQ Brownfield’s Project Manager, Geosyntec proposes to perform
supplemental assessments to address data gaps in support of obtaining a final Brownfields
Agreement.
The proposed scope of work has been developed in consideration of potential reuse of the
Site and seeks to:
1. Establish a baseline for pre-existing contamination at the Site;
2. Assess the Site for additional, potential environmental concerns (i.e. “prove the
negative”); and
3. Facilitate reuse.

Generally, this work is planned to consist of one or more of the following, as applicable:

i) Groundwater monitoring in existing monitoring wells to evaluate current
groundwater quality;
ii) Surficial soil sampling in NCDEQ-selected locations to evaluate surficial
soil quality in anticipation of soil relocation during Site grading and human
exposure to soils during future occupancy; and
iii) Soil gas sampling in select locations to assess for the potential for vapor
intrusion into future buildings.
A description of the field methodologies and proposed sampling techniques is presented
in Section 6.

Geosyntec will review the data and provide a report to NCDEQ describing the sampling
completed, a tabular summary of validated data, figures depicting sampling locations, and
copies of raw data collected. The report will include recommendations for additional
assessment and, if needed, mitigation measures to minimize human exposure to
contamination.
The former soil source area was excavated and thermally treated on-Site as part of the
Source Area Remedy Report. Further, post-backfill fixed-based confirmation soil
samples found TCE concentrations in soil below 1 ppm, and DNAPL was not
encountered during the installation of RW-1. Remaining TCE impacts in the former

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source area are documented in the 2000 Source Area Remedy Report and do not appear
to pose a threat to human health given their depth below grade. Historical reports do not
indicate the potential for alternative contamination sources in other areas of the Site.
Therefore, a comprehensive soil assessment and/or remediation is not proposed to
facilitate Brownfields redevelopment. Limited soil sampling, pursuant to NCDEQ
direction, is proposed to evaluate surficial soil quality at the Site.
5.1 Groundwater Sampling
Geosyntec proposes to collect groundwater samples from a sub-set of the monitoring
wells located on the Brownfields Site to support redevelopment. The following shallow
and deep wells are proposed (Figure 4):
 Shallow: MW-1, MW-2, MW-3, MW-6, MW-8, MW-9, MW-10, MW-12
 Deep: DMW-2, DMW-4
The rationale for the proposed well sampling is provided below.
MW-12 and DMW-2

Former source area wells MW-12 and DMW-2 are proposed for sampling given their
historically elevated detections of several VOCs, including PCE, TCE, methylene
chloride, and benzene derivatives. This will provide groundwater data from a deep and
shallow well proximal to the former source area.
MW-8, MW-9, DMW-4

MW-8 and MW-9 are shallow wells located on the northern Site property boundary;
DMW-4 is a deep well located proximal to MW-9. MW-8 was most recently sampled in
January 2012; PCE was detected above its 2L Standard during this event. Both MW-9
and DMW-4 were most recently sampled in January 2014; both PCE and TCE were each
detected well above their respective 2L Standards in both samples. Each of these wells
are proposed for re-sampling given the extensive time since their most recent sampling
event, their proximity to off-Site properties, and their location relative to the Site
groundwater plume. Further, none of these wells were included in S&ME’s January 2017
ESR sample list; therefore, it is unlikely these wells will be sampled as part of the ongoing
IHSB Site assessment requirements.
MW-1, MW-2, MW-3, MW-6, and MW-10

GN6502/20180824 Harris BLVD WP Rev1 FINAL 13 8/24/2018

MW-1 is located hydrogeologically upgradient relative to the former source area; it is
prudent to sample MW-1 to confirm off-Site impacts are not migrating on-Site from
adjoining properties.
MW-2 is located near the eastern Site boundary and is believed to be most recently
sampled in September 1999; TCE was detected at 7 µg/L in groundwater, above its 2L
Standard of 3 µg/L. MW-3 is located off-Site on the Eastern Parcel and also appears to
be last sampled in September 1999, revealing a detection of PCE of 1 µg/L, above its 2L
Standard of 0.7 µg/L. MW-10 is located on the northern Site property boundary and was
most recently sampled in August 2010. Benzene was detected in MW-10 above its 2L
Standard, though PCE has also historically been detected above its 2L Standard as well.
MW-2, MW-3, and MW-10 are proposed for re-sampling given the extensive time since
their most recent sampling events and their proximity to off-Site properties.
MW-6 is located on the southern edge of the on-Site groundwater plume and has not been
sampled since 1999. Sampling this well is proposed to provide up-to-date analytical data
at the southern portion of the plume.
5.2 Soil Sampling
NCDEQ indicated surficial (top two feet) soil sampling is required by NCDEQ to approve
proposed earth moving/grading activities at the Site during redevelopment activities and
demonstrate surficial soils do not pose a threat to human health for construction workers
and future occupants. Seven soil samples are proposed based on direction from NCDEQ.
Proposed soil sampling locations are presented on Figure 5.
5.3 Soil Gas Sampling
The Site is planned for redevelopment in the form of multi-family residential occupancy.
Geosyntec proposes to collect discrete soil gas samples co-located with the tentative
residential building layout to evaluate the potential for VI. Figure 6 overlays the
proposed redevelopment building footprint and approximate boundary of the VOC
groundwater plume (i.e., the inferred extent of groundwater impacts above 2L Standards
as reported in historical reports). As indicated in Figure 6, two proposed building
footprints are co-located with the groundwater plume extent. An additional residential
building is proposed to be located south of the groundwater plume. This Work Plan
proposes the collection of five soil gas samples at five locations; two locations at proposed
“Building 1”, two locations at proposed “Building 2”, and one location at proposed
“Building 3”. The planned Site layout includes several additional buildings, though many

GN6502/20180824 Harris BLVD WP Rev1 FINAL 14 8/24/2018
of these are located on the Southern Parcel, separated from the groundwater plume extent.
Soil gas sampling beneath the outstanding buildings is unnecessary based on the
understanding of the groundwater plume areal footprint.

GN6502/20180824 Harris BLVD WP Rev1 FINAL 15 8/24/2018
6. ASSESSMENT PROCEDURES
Procedures will generally follow the Operating Procedures as outlined by the U.S.
Environmental Protection Agency (USEPA) Region IV and the NCDEQ IHSB.
Additional media specific procedures are discussed further below. Soil cuttings and
purge water generated during assessment activities will be drummed and disposed of in
accordance with characterization data generated as part of analytical testing described
below. Collected samples will be submitted to a NELAP-accredited fixed-base laboratory
certified in North Carolina for the chemical analyses listed below. Estimated analytical
concentrations (“J” flagged) will be documented and the laboratory method detection
limits, where practical, will not exceed NCDEQ screening criteria. Level II QA/QC will
be requested. Appropriate chain of custody procedures will be followed upon sample
collection, including proper ice packaging, temperature blanks, custody sealing, etc.
6.1. Groundwater Assessment
Prior to groundwater sample collection, Geosyntec will: (i) assess for the presence of
DNAPL; (ii) measure the total depth of the monitoring well to verify well depths; and
(iii) measure the depth to groundwater in each monitoring well to evaluate horizontal
groundwater flow direction at the Site.
For groundwater purging and sample collection, the low-flow micro-purge technique is
preferred and will be attempted initially. The pump intake or tubing will be placed in the
mid-portion of the screened interval of the well. If the screened interval is unknown, the
pump intake or tubing will be placed approximately five feet off the bottom of the well
or mid away in the initial water column. To the extent practical, the purge rate will be
set to minimize drawdown. Stability of field parameters will prompt sample collection.
Stability conditions for three consecutive readings of determining field parameters are
presented below.
 pH: 0.2 SU through 3;
 Specific Conductance: 5%, and;
 Turbidity: <10 NTU or stable within 10%.
If drawdown is considered “excessive”, the more traditional multiple volume purge
method will be used.

GN6502/20180824 Harris BLVD WP Rev1 FINAL 16 8/24/2018
Collected groundwater samples will be submitted to a fixed-base laboratory and will be
analyzed for VOCs by EPA Method 8260, semi-volatile organic compounds (SVOCs) by
EPA Method 8270, and the eight RCRA metals by EPA Method 6010, 6020 and/or 7471.
Additionally, 10% of the samples will be analyzed as duplicate samples and trip blanks
will be analyzed for VOCs for Quality Control purposes. Groundwater samples will be
screened against the 2L Groundwater Standards.
6.2. Soil Assessment
The primary risk driver at the Site (as it relates to soil) is dermal contact with surficial
soil and / or ingestion of surficial soil. As such, the soil samples will be collected from
the surficial (top two feet) soils. Surficial soil samples will be collected using a hand
auger. Soil samples will be screened with a calibrated photo-ionization detector (PID)
and soil lithology will be logged by a field geologist / engineer. Sampling equipment will
be decontaminated prior to each use using distilled water and Liquinox (or equivalent).
One composite sample will be collected from the top two feet of soil at each soil sampling
location. Soil samples collected for VOC analysis will not be composited.
Collected soil samples will be submitted to a fixed-base laboratory and will be analyzed
for VOCs by EPA Method 8260, SVOCs by EPA Method 8270, and the eight RCRA
metals plus hexavalent chromium by EPA Method 6010, 6020 and/or 7471. Additionally,
10% of the samples will be analyzed as duplicate samples and trip blanks will be analyzed
for VOCs for Quality Control purposes. Soil samples will be screened against the
NCDEQ IHSB Preliminary Soil Remediation Goals (PSRGs).
6.3. Vapor Intrusion Assessment
Geosyntec proposes to install soil gas probes (SGPs) at five locations at the Site. One
SGP implant will be installed per sampling location. SGPs will be installed at a minimum
depth of 5 ft bgs and a maximum depth of approximately 2-3 feet above the water table,
as observed in the field during SGP installation activities (the water table is expected to
be encountered at approximately 15 ft bgs based on historical reports). Based on existing
Site conditions, the proposed soil gas samples appear to be located in unpaved areas;
therefore, these will not be “sub-slab” soil gas samples. Current on-Site buildings are
planned to be demolished as part of Site redevelopment; therefore, no sub-slab soil gas
or indoor air samples will be collected.

GN6502/20180824 Harris BLVD WP Rev1 FINAL 17 8/24/2018
Installation of Soil Gas Probes

Prior to the installation of the SGPs, underground utilities will be located through
notification to a public utility locating service (North Carolina 811). Final sampling
locations will be modified, if necessary, based on utility locations.
SGP boreholes will be drilled by a North Carolina-licensed driller and will be advanced
using GeoprobeTM soil coring technology. Soil samples will be collected, visually
inspected and classified for lithology.
The following SGP design is prescribed in an effort to minimize the potential for sample
dilution due to leakage from the surface. The SGPs will consist of ¼-inch diameter Nyla-
Flow tubing, fitted with a GeoprobeTM stainless steel soil gas sampling implant (6-inch
screen interval). A sand filter-pack will be placed around the soil gas probe screens, to a
height of 6 inches above the screen. Granular bentonite and water will be placed in two,
3-inch lifts above the filter-packs to form a bridge, and a slurry consisting of powdered
bentonite and water will be placed above the bridge to within 1 foot of the ground surface.
The backfill slurry will be placed as the GeoprobeTM casing is withdrawn, to help prevent
collapse of geologic materials and potential compromise of the seals. A brass or stainless-
steel compression fitting and valve will be fitted to the top of the probe. The locations of
each SGP will be measured in the field using a global positioning system (GPS) with sub-
meter accuracy. SGPs will be allowed to equilibrate prior to sampling. General SGP
construction details are presented on Figure 7.

GN6502/20180824 Harris BLVD WP Rev1 FINAL 18 8/28/2018
Soil Gas Sampling
A soil gas sampling assembly will be setup as shown in general accordance with Figure
8 and will be performed in accordance with the NCDEQ Division of Waste
Management’s March 2018 Vapor Intrusion Guidance. A peristaltic pump may be
substituted for the “lung box”. Prior to sampling, a “shut-in test” will be conducted to
assess the assembly for air leaks. Upon successful completion of the shut-in test, the
assembly will be purged to remove atmospheric air entrained during installation. Field
screening will be conducted during purging activities prior to sample collection. During
field screening a tracer test will be conducted to verify that a significant amount of
atmospheric air does not enter the sample through the annular seal or associated fittings.
A shroud will be placed around the ground surface of each probe and soil gas sampling
assembly prior to sample collection and a tracer gas (e.g., helium) will be added inside
the shroud during the purging process. The concentration of tracer in the shroud and in
the field screening samples will be recorded with a field meter. If field screening indicates
the tracer exceeds 5% of the concentration in the shroud, fittings will be checked and or
the probe will be resealed / replaced as needed to obtain a sample with appropriate
integrity. Nylaflow tubing will be used during soil gas sampling.
Soil vapor samples will be collected using six-liter batch-certified Summa canisters. The
initial vacuum will be measured before use to confirm leaks have not occurred during
shipping. After sample collection, the residual vacuum will also be measured and
recorded. A minimum vacuum of 5 inches Hg will be targeted. Samples will be collected
by connecting the Summa canister directly to the probe through a 200 milliliter per minute
(maximum flow rate) flow controller connected using Swagelok fittings. Three casing
volumes will be purged and samples will be collected as soon as practicable after purging.
Collected soil gas samples will be analyzed for VOCs by EPA Method TO-15.
Additionally, 10% of the samples will be analyzed as duplicate samples. Soil gas samples
will be screened against the NCDEQ Vapor Intrusion Screening Levels (VISLs) for soil
gas.

GN6502/20180824 Harris BLVD WP Rev1 FINAL 19 8/24/2018
7. PROPOSED PATH FORWARD
Geosyntec has prepared this Work Plan to present details of planned additional
assessment work related to groundwater, soil, and soil gas sampling at the Site to obtain
a finalized BFA. Obtaining a BFA is a critical step in facilitating the pending sale of the
property and planned redevelopment. The work proposed herein is intended to collect
data to establish baseline environmental conditions and support the implementation of
potential mitigation measures (e.g., in the form of VI mitigation for future occupied
buildings). The baseline environmental conditions are essential to realize the liability
protections offered under the NCBP. Based upon information gathered during the course
of the assessment work proposed herein, Geosyntec will make follow-up
recommendations in a report to be submitted to NCDEQ.
The overall objective of this project is to comprehensively redevelop the property to
multi-family residential use. The Charlotte City Council approved rezoning the CAC
property for residential use in a 16 April 2018 meeting. The CAC property is idled and
has been underutilized for many years. The existing industrial buildings on-Site are in
stark contrast to the surrounding community, which has flourished through recent
residential development. The property is located in a predominately residential area and
is ideal for continued residential development in the burgeoning City of Charlotte.
We look forward to your review and approval of this Work Plan and your continued
assistance in pursuing a BFA for the Site.

GN6502/20180824 Harris BLVD WP Rev1 FINAL 20 8/24/2018
8. REFERENCES4
T.E. Scott Construction. Phase I Environmental Site Assessment for 7705 E. Harris
Boulevard. Charlotte, North Carolina. October 1994.
North Carolina Department of Environmental Quality. No Further Action Notification.
Gasoline UST Incident and Removal. Mooresville, North Carolina. August 1991.
North Carolina Department of Environmental Quality. Pollution Incident / UST Leak
Reporting Form: Incident 19164. Mooresville, North Carolina. December 1995.
North Carolina Department of Environmental Quality. No Further Action Notification.
Aviation Fuel UST Incident and Removal. Mooresville, North Carolina. October 1998.
Unknown. Limited Site Assessment Report – Phase I and II. October 1998.
Unknown. Comprehensive Site Assessment. October 1999.
Duke Engineering and Services, Inc. Charlotte Aircraft Corporation Source Area
Remediation Report. Charlotte, North Carolina. July 2000.
Duke Engineering and Services, Inc. Charlotte Aircraft Corporation Groundwater
Corrective Action Plan. Charlotte, North Carolina. November 2000.
Duke Engineering and Services, Inc. Charlotte Aircraft Corporation Groundwater
Corrective Action Plan Amendment. Charlotte, North Carolina. March 2003.
Duke Engineering and Services, Inc. Charlotte Aircraft Corporation Groundwater
Corrective Action Plan Addendum. Charlotte, North Carolina. April 2004.
Mid-Atlantic Associates, Inc. Vapor Intrusion Study Report: Sub-Slab and Indoor Air
Testing Charlotte Aircraft Corporation Site. Charlotte, North Carolina. April 2011.
North Carolina Department of Environmental Quality. Inactive Hazardous Sites Branch.
Additional Assessment Requirement Notice. Mooresville, North Carolina. August 2011.

4 References are provided in chronological order, rather than alphabetical order, to provide a general
timeline of Site events. Only the most prominent historical reports are included in this section. Additional
reports, such as routine groundwater monitoring and regulatory correspondence letters, were reviewed to
complete this Work Plan but are not referenced in this section for conciseness.

GN6502/20180824 Harris BLVD WP Rev1 FINAL 21 8/24/2018
North Carolina Department of Environmental Quality. Inactive Hazardous Sites Branch.
Vapor Intrusion Study Report – Charlotte Aircraft Corporation. December 2011.
S&ME. Environmental Assessment Report: Charlotte Aircraft #3. Charlotte, North
Carolina. January 2017.

TABLE
Table 1 - Historical Groundwater Analytical Data SummaryFormer Charlotte Aircraft #3
7705 East W.T. Harris BoulevardCharlotte, North Carolina
Well ID Approximate Depth (ft bgs)Date Sampled
Tetrachloroethene (PCE)Trichloroethene (TCE)cis-1,2 Dichloroethene1,1 Dichloroethane1,1,2 Trichloroethane1,1,2,2 Tetrachloroethane1,2 Dichlorobenzene1,2 Dichloroethane1,2 Dichloropropane1,2,4 Trimethylbenzene1,4 DichlorobenzeneBenzeneCarbon TetrachlorideChlorobenzeneChloromethaneMethylene chlorideNaphthalenen-PropylbenzeneToluenem&pXyleneTrichlorofluoromethaneVinyl ChlorideTop Bottom
0.7 3 70 6 0.6 0.2 20 0.4 0.6 400 6 1 0.3 50 3 5 6 70 600 500 2,000 0.03
Sep-99 ND ND NA ND ND ND ND ND ND NA 45 180 ND ND NA ND 30 NA ND 15 NA NDFeb-11 ND ND ND ND ND ND ND ND ND NA ND 3.7 ND ND ND ND 21 NA ND 2.3 ND NDJan-12 ND ND ND ND ND ND ND ND ND NA 0.1 2.8 ND ND ND ND 9.8 NA ND 2.3 ND ND
Nov-16 ND ND 3.1 ND NA NA ND ND NA ND ND ND NA ND NA ND 1.3 ND ND NA NA NDSep-99 3 4,300 NA ND ND ND 3 3 ND NA 3 1 ND ND NA 7 ND NA ND ND NA ND
Feb-01 ND 8,200 NA NA ND NA NA ND NA NA NA NA ND ND NA NA NA NA NA NA NA ND
Aug-01 ND 13,000 ND ND ND ND ND ND ND NA ND ND ND ND ND ND NA NA ND ND ND NDFeb-02 ND 8,000 ND ND ND ND ND ND ND NA ND ND ND ND ND ND NA NA ND ND ND ND
Aug-02 ND 9,700 ND ND ND ND ND ND ND NA ND ND ND ND ND ND NA NA ND ND ND ND
Feb-03 ND 14,000 ND ND ND ND ND ND ND NA ND 2,900 ND ND ND ND NA NA 3,900 1,100 ND ND
Aug-03 ND 10,000 ND ND ND ND ND ND ND NA ND ND ND ND ND ND NA NA ND 610 ND ND
Feb-04 15 9,900 57 ND ND ND 80 33 ND NA 18 4.2 ND 15 ND 18 120 NA ND 2.9 ND 1.7Aug-04 20 12,000 130 5.1 3 ND 61 58 ND NA 17 4.7 ND 25 ND 50 NA NA 1 3.7 ND ND
Feb-05 ND 8,800 ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Aug-05 ND 11,000 ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Apr-06 ND 15,000 ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Aug-06 ND 10,000 ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND NDFeb-07 ND 9,000 ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Aug-07 ND 9,460 315 ND ND ND ND ND ND NA ND ND ND ND ND 1,770 ND NA ND ND ND ND
Feb-08 ND 11,900 ND ND ND ND ND ND ND NA ND ND ND ND ND 2,520 ND NA ND ND ND ND
Aug-08 ND 13,300 300 ND ND ND ND ND ND NA ND ND ND ND ND 3,750 ND NA ND ND ND ND
Feb-09 ND 12,000 961 ND ND ND ND ND ND NA ND ND ND ND ND 3,100 ND NA ND ND ND NDAug-09 ND 9,230 2,600 ND ND ND 233 324 ND NA ND ND ND 92.2 ND 4,350 369 NA ND ND ND ND
Feb-10 ND 8,220 4,830 ND ND ND 354 496 ND NA 56.2 ND ND 141 ND 5,570 580 NA ND ND ND ND
Aug-10 56.9 9,190 6,560 56.9 ND ND 360 582 ND NA ND ND ND 146 ND 6,910 499 NA ND ND ND ND
Feb-11 ND 6,480 5,560 ND ND ND 286 537 ND NA ND ND ND 127 ND 5,310 346 NA ND ND ND ND
Jan-12 ND 6,530 6,000 ND ND ND 408 716 ND NA ND ND ND 256 ND 6,740 640 NA ND ND ND NDJan-14 28 J 8,200 9,000 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Nov-16 ND 1,220 9,670 95.9 NA NA 367 1,300 NA 256 50.9 ND NA 124 NA 1,960 321 ND ND NA NA ND
Aug-02 2,000 5,600 ND ND ND ND ND ND ND NA ND ND ND ND ND ND NA NA ND ND ND ND
Feb-03 1,700 5,300 ND ND ND ND ND ND ND NA ND ND ND ND ND ND NA NA ND ND ND ND
Aug-03 3,200 10,000 ND ND ND ND ND ND ND NA ND ND ND ND ND ND NA NA ND ND ND NDFeb-04 3,400 8,100 ND ND ND ND 5.4 ND ND NA 1.2 ND ND 3.1 ND ND ND NA ND ND ND ND
Aug-04 4,900 10,000 29 ND ND ND 7.4 8.9 ND NA 3.1 1.4 59 8.7 ND ND NA NA ND ND ND ND
Feb-05 3,600 7,000 ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Aug-05 5,600 11,000 ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Apr-06 6,500 11,000 ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND NDAug-06 7,400 17,000 ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Feb-07 5,300 13,000 ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Aug-07 6,830 15,100 ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Feb-08 6,180 17,100 ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Aug-08 7,680 17,900 ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND NDFeb-09 5,610 14,700 ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Aug-09 6,370 15,400 ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Feb-10 5,090 10,300 ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Aug-10 7,560 11,600 ND ND ND ND ND ND ND NA ND ND ND ND ND 320 ND NA ND ND ND ND
Feb-11 6,700 11,700 ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND NDJan-12 5,710 9,110 68 ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Jan-14 7,000 9,500 36 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA
15A NCAC 02L Groundwater Standards and IMACs (values in µg/L)
Screened
Interval (ft bgs)
49 44 49DMW1
DMW2
DMW3 89.5 ----
61 56 61
Page 1 of 8
Table 1 - Historical Groundwater Analytical Data SummaryFormer Charlotte Aircraft #3
7705 East W.T. Harris BoulevardCharlotte, North Carolina
Well ID Approximate Depth (ft bgs)Date Sampled
Tetrachloroethene (PCE)Trichloroethene (TCE)cis-1,2 Dichloroethene1,1 Dichloroethane1,1,2 Trichloroethane1,1,2,2 Tetrachloroethane1,2 Dichlorobenzene1,2 Dichloroethane1,2 Dichloropropane1,2,4 Trimethylbenzene1,4 DichlorobenzeneBenzeneCarbon TetrachlorideChlorobenzeneChloromethaneMethylene chlorideNaphthalenen-PropylbenzeneToluenem&pXyleneTrichlorofluoromethaneVinyl ChlorideTop Bottom
0.7 3 70 6 0.6 0.2 20 0.4 0.6 400 6 1 0.3 50 3 5 6 70 600 500 2,000 0.0315A NCAC 02L Groundwater Standards and IMACs (values in µg/L)
Screened
Interval (ft bgs)
Aug-02 32 93 ND ND ND ND ND ND ND NA ND ND ND ND ND ND NA NA ND ND ND ND
Feb-03 30 110 ND ND ND ND ND ND ND NA ND ND ND ND ND ND NA NA ND ND ND NDAug-03 41 110 ND ND ND ND ND ND ND NA ND ND 110 ND ND ND NA NA ND ND ND ND
Feb-04 51 100 ND ND ND ND ND ND ND NA ND ND 6.4 ND ND ND ND NA ND ND ND ND
Aug-04 61 140 1.5 ND ND ND ND ND ND NA ND ND 9.9 ND ND ND NA NA ND ND ND ND
Feb-05 42 110 ND ND ND ND ND ND ND NA ND ND 5.9 ND ND ND NA NA ND ND ND ND
Aug-05 64 200 ND ND ND ND ND ND ND NA ND ND 9.1 ND ND ND NA NA ND ND ND NDApr-06 67 250 ND ND ND ND ND ND ND NA ND ND 6.4 ND ND ND ND NA ND ND ND ND
Aug-06 60 230 ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Feb-07 70 250 ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Aug-07 70.7 283 ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Feb-08 71.2 377 ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND NDAug-08 85.4 385 ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Feb-09 60 341 ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Aug-09 78.6 359 1.2 ND ND ND ND ND ND NA ND ND 4.6 ND ND ND ND NA ND ND ND ND
Feb-10 264 642 3.5 ND ND ND ND ND 2 NA ND ND 14.4 ND ND ND ND NA ND ND ND ND
Aug-10 176 601 3.5 ND ND ND ND ND 2 NA ND ND 6.8 ND ND ND ND NA ND ND ND NDFeb-11 131 537 ND ND ND ND ND ND ND NA ND ND 5.5 ND ND ND ND NA ND ND ND ND
Jan-12 131 542 6.2 ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Jan-14 170 740 ND NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA
DMW5 61.7 55 60 Nov-16 ND ND 1 ND NA NA ND ND NA ND ND ND NA ND NA ND ND ND ND NA NA NDSep-99 ND ND NA ND ND ND ND ND ND NA ND 16 ND ND NA ND 28 NA 2 20 NA ND
Feb-11 ND ND ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Jan-12 ND ND ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Nov-16 ND ND ND ND NA NA ND ND NA ND ND ND NA ND NA ND ND ND ND NA NA ND
MW2 20 5 20 Sep-99 ND 7 NA ND ND ND ND ND ND NA ND ND ND ND NA ND ND NA ND ND NA ND
MW3 20 5 20 Sep-99 1 ND NA ND ND ND ND ND ND NA ND ND ND ND NA ND ND NA ND ND NA ND
Sep-99 ND 1 NA ND ND ND ND ND ND NA ND ND ND ND NA ND ND NA ND ND NA ND
Nov-16 ND ND ND ND NA NA ND ND NA ND ND ND NA ND NA ND ND ND ND NA NA ND
Sep-99 480 3,600 NA 3 1 1 105 16 ND NA 15 1 ND 3 NA ND 18 NA ND ND NA 29
Feb-01 ND 1,500 NA NA ND NA NA ND NA NA NA NA ND ND NA NA NA NA NA NA NA ND
Aug-01 120 590 11,000 ND ND ND ND ND ND NA ND ND ND ND ND ND NA NA ND ND ND 240Feb-02 ND 780 13,000 ND ND ND ND ND ND NA ND ND ND ND ND ND NA NA ND ND ND ND
Feb-03 ND 250 20,000 ND ND ND ND ND ND NA ND ND ND ND ND ND NA NA ND ND ND ND
Aug-03 ND 240 6,000 ND ND ND 160 ND ND NA ND ND ND ND ND ND NA NA ND ND ND 480
Feb-04 13 62 3,300 2.4 ND ND 250 ND ND NA 33 1.2 ND 7.9 ND ND 9.7 NA ND ND ND 650
Aug-04 25 65 2,800 4.7 ND ND 150 ND ND NA 31 ND ND 7.3 ND ND NA NA ND ND ND 620Feb-05 ND 34 850 ND ND ND 11 ND ND NA 1.1 ND ND ND ND ND NA NA ND ND ND 150
Aug-05 ND 50 650 ND ND ND 73 ND ND NA ND ND ND ND ND ND NA NA ND ND ND 44
Apr-06 ND ND 770 ND ND ND 180 ND ND NA 26 ND ND ND ND ND ND NA ND ND ND 140
Aug-06 ND ND 710 ND ND ND 53 ND ND NA NA ND ND ND ND ND ND NA ND ND ND 85
Feb-07 ND ND 170 ND ND ND 170 ND ND NA 33 ND ND ND ND ND ND NA ND ND ND 29Aug-07 16 25 389 ND ND ND 28.9 ND ND NA 6.4 ND ND ND ND ND ND NA ND ND ND NA
Feb-08 ND ND 704 ND ND ND 45.6 ND ND NA 33 ND ND ND ND ND ND NA ND ND ND 85.2
Aug-08 ND 28.8 738 ND ND ND 21.2 ND ND NA ND ND ND ND ND ND ND NA ND ND ND 31
Feb-09 ND ND 160 ND ND ND 80.6 ND ND NA ND ND ND ND ND ND ND NA ND ND ND 30.9
Aug-09 4.1 3.9 154 1.6 ND ND 72 ND ND NA 14.7 ND ND 2.8 ND ND ND NA ND ND ND 31.4Feb-10 8.8 4.4 33 1.8 ND ND 74 ND ND NA 14.5 ND ND 4.1 ND ND 5.1 NA ND ND ND 9.8
Aug-10 23.5 25.5 102 ND ND ND 81.8 ND ND NA 16.5 ND ND 20.4 ND ND ND NA ND ND ND 27.3
Feb-11 12.2 12.3 173 ND ND ND 17.6 ND ND NA 4.8 ND ND 1.3 ND ND ND NA ND ND ND 19
Jan-12 12.6 9.6 145 ND ND ND 24.3 ND ND NA 5.7 ND ND 20.9 ND ND ND NA ND ND ND 49.6
Jan-14 20 8.4 54 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA
MW6 20 5 20 Sep-99 ND 2 NA ND ND ND ND ND ND NA ND ND ND ND NA ND ND NA ND ND NA ND
MW4
MW5
20
20 5 20
20 5
DMW4
MW1 20
20 5
143 ----
Page 2 of 8
Table 1 - Historical Groundwater Analytical Data SummaryFormer Charlotte Aircraft #3
7705 East W.T. Harris BoulevardCharlotte, North Carolina
Well ID Approximate Depth (ft bgs)Date Sampled
Tetrachloroethene (PCE)Trichloroethene (TCE)cis-1,2 Dichloroethene1,1 Dichloroethane1,1,2 Trichloroethane1,1,2,2 Tetrachloroethane1,2 Dichlorobenzene1,2 Dichloroethane1,2 Dichloropropane1,2,4 Trimethylbenzene1,4 DichlorobenzeneBenzeneCarbon TetrachlorideChlorobenzeneChloromethaneMethylene chlorideNaphthalenen-PropylbenzeneToluenem&pXyleneTrichlorofluoromethaneVinyl ChlorideTop Bottom
0.7 3 70 6 0.6 0.2 20 0.4 0.6 400 6 1 0.3 50 3 5 6 70 600 500 2,000 0.0315A NCAC 02L Groundwater Standards and IMACs (values in µg/L)
Screened
Interval (ft bgs)
Sep-99 1,039 510 NA ND ND 4 ND 6 ND NA ND ND 6 1 NA ND ND NA ND ND NA ND
Feb-01 1,300 620 NA NA ND NA NA ND NA NA NA NA ND ND NA NA NA NA NA NA NA NDAug-01 1,600 580 280 ND ND ND ND ND ND NA ND ND ND ND ND ND NA NA ND ND ND ND
Feb-02 460 160 20 ND ND ND ND ND ND NA ND ND ND ND ND ND NA NA ND ND ND ND
Feb-03 180 70 20 ND ND ND ND ND ND NA ND ND ND ND ND ND NA NA ND ND ND ND
Aug-03 550 120 ND ND ND ND ND ND ND NA ND ND ND ND ND ND NA NA ND ND ND ND
Feb-04 720 260 32 ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND NDAug-04 690 200 17 ND ND ND ND ND ND NA ND ND ND ND ND ND NA NA ND ND ND ND
Feb-05 540 160 ND ND ND ND ND ND ND NA ND ND ND ND ND ND NA NA ND ND ND ND
Aug-05 1,000 310 57 ND ND ND ND ND ND NA ND ND ND ND ND ND NA NA ND ND ND ND
Apr-06 1,200 310 45 ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Aug-06 730 240 ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND NDFeb-07 390 110 ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Aug-07 526 196 32.1 ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND NA
Feb-08 578 256 ND ND ND ND 34.6 ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Aug-08 652 287 21.3 ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Feb-09 381 142 ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND NDAug-09 315 89 14.8 ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Feb-10 179 49 7 ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Aug-10 375 72 10.5 ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Sep-99 ND ND NA ND ND ND ND ND ND NA ND ND ND ND NA ND ND NA ND ND NA NDFeb-01 13 1.7 NA NA ND NA NA ND NA NA NA NA ND ND NA NA NA NA NA NA NA ND
Aug-01 23 1.2 ND ND ND ND ND ND ND NA ND ND ND ND ND ND NA NA ND ND ND ND
Feb-02 21 1.9 ND ND ND ND ND ND ND NA ND ND ND ND ND ND NA NA ND ND ND ND
Feb-03 6.6 1.3 ND ND ND ND ND ND ND NA ND ND ND ND ND ND NA NA ND ND ND ND
Aug-03 14 ND ND ND ND ND ND ND ND NA ND ND ND ND ND ND NA NA ND ND ND NDFeb-04 19 ND ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Aug-04 24 1.1 ND ND ND ND ND ND ND NA ND ND ND ND ND ND NA NA ND ND ND NDFeb-05 22 ND ND ND ND ND ND ND ND NA ND ND ND ND ND ND NA NA ND ND ND ND
Aug-05 ND ND ND ND ND ND ND ND ND NA ND ND ND ND ND ND NA NA ND ND ND ND
Apr-06 16 ND ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND NDAug-06 13 ND ND ND ND ND ND ND ND NA ND ND ND ND 39 ND ND NA ND ND ND ND
Feb-07 11 ND ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND NDAug-07 3.4 ND ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND NA
Feb-08 7.9 ND ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Aug-08 2.4 ND ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND NDFeb-09 6.1 ND ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Aug-09 5.6 ND ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND NDFeb-10 6.8 ND ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Aug-10 6.4 ND ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Feb-11 5.4 ND ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND NDJan-12 6.4 ND ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Jan-14 3.6 0.29 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA
9 24
20 5 20
24
MW7
MW8
Page 3 of 8
Table 1 - Historical Groundwater Analytical Data SummaryFormer Charlotte Aircraft #3
7705 East W.T. Harris BoulevardCharlotte, North Carolina
Well ID Approximate Depth (ft bgs)Date Sampled
Tetrachloroethene (PCE)Trichloroethene (TCE)cis-1,2 Dichloroethene1,1 Dichloroethane1,1,2 Trichloroethane1,1,2,2 Tetrachloroethane1,2 Dichlorobenzene1,2 Dichloroethane1,2 Dichloropropane1,2,4 Trimethylbenzene1,4 DichlorobenzeneBenzeneCarbon TetrachlorideChlorobenzeneChloromethaneMethylene chlorideNaphthalenen-PropylbenzeneToluenem&pXyleneTrichlorofluoromethaneVinyl ChlorideTop Bottom
0.7 3 70 6 0.6 0.2 20 0.4 0.6 400 6 1 0.3 50 3 5 6 70 600 500 2,000 0.0315A NCAC 02L Groundwater Standards and IMACs (values in µg/L)
Screened
Interval (ft bgs)
Sep-99 850 350 NA ND ND 2 ND 3 ND NA ND ND ND 1 NA ND ND NA ND ND NA ND
Feb-01 1,500 220 NA NA 2.8 NA NA 3 NA NA NA NA ND ND NA NA NA NA NA NA NA 6.2Aug-01 1,000 180 61 ND ND ND ND ND ND NA ND ND ND ND ND ND NA NA ND ND ND ND
Feb-02 590 62 36 ND ND 1.3 ND 2.2 ND NA ND ND ND ND ND ND NA NA ND ND ND 4.5
Feb-03 920 250 23 ND ND ND ND ND ND NA ND ND ND ND ND ND NA NA ND ND ND ND
Aug-03 850 230 67 ND ND ND ND ND ND NA ND ND ND ND ND ND NA NA ND ND ND ND
Feb-04 670 230 39 ND ND ND ND 3.8 ND NA ND ND ND 1.4 ND ND ND NA ND ND ND 2.9Aug-04 670 200 36 ND ND 1.2 ND 2.8 ND NA ND ND ND 2 ND ND NA NA ND ND ND 1.5
Feb-05 600 170 31 ND ND ND ND ND ND NA ND ND ND ND ND ND NA NA ND ND ND ND
Aug-05 540 140 39 ND ND ND ND ND ND NA ND ND ND ND ND ND NA NA ND ND ND ND
Apr-06 550 140 ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Aug-06 280 89 ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND NDFeb-07 360 110 23 ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Aug-07 186 65 25.5 ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND NA
Feb-08 73 22.4 23 ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Aug-08 127 50.3 5.3 ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Feb-09 182 85.7 17 ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND NDAug-09 175 107 28 ND ND ND ND 0.6 ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Feb-10 479 93.4 21.6 ND ND ND ND 0.6 ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Aug-10 389 111 26.7 ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Feb-11 235 75.8 17.7 ND ND ND ND ND ND NA ND ND ND ND ND 5.8 ND NA ND ND ND ND
Jan-12 158 74.5 21.8 ND ND ND ND ND ND NA ND ND ND 2.9 ND ND ND NA ND ND ND ND
Jan-14 160 72 19 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Sep-99 ND 2 NA ND ND ND 4 ND ND NA ND ND ND ND NA ND ND NA ND ND NA ND
Feb-01 ND ND NA NA ND NA NA ND NA NA NA NA ND 4.1 NA NA NA NA NA NA NA ND
Aug-01 2 1.1 ND ND ND ND ND ND ND NA ND 1.7 ND 11 ND ND NA NA ND ND ND NDFeb-02 5.2 ND ND ND ND ND ND ND ND NA ND 1.4 ND 3.5 ND ND NA NA ND ND ND ND
Feb-03 1.6 ND ND ND ND ND ND ND ND NA ND 3.9 ND 14 ND ND NA NA ND ND ND NDAug-03 2.8 ND ND ND ND ND ND ND ND NA ND 2.9 ND 14 ND ND NA NA ND ND ND ND
Feb-04 3.9 ND ND ND ND ND ND ND ND NA ND 5.3 ND 32 ND ND ND NA ND ND ND ND
Aug-04 2.3 ND ND ND ND ND ND ND ND NA ND 6.8 ND 47 ND ND NA NA ND ND ND NDFeb-05 1.3 ND ND ND ND ND ND ND ND NA ND 9.1 ND 51 ND ND NA NA ND ND ND ND
Aug-05 ND ND ND ND ND ND ND ND ND NA ND 4.6 ND ND ND ND NA NA ND ND ND NDApr-06 ND ND ND ND ND ND ND ND ND NA ND 6.4 ND 35 ND ND ND NA ND ND ND ND
Aug-06 5.9 1.2 ND ND ND ND ND ND ND NA ND ND ND 12 ND ND ND NA ND ND ND ND
Feb-07 ND ND ND ND ND ND ND ND ND NA ND 9.1 ND 50 ND ND ND NA ND ND ND NDAug-07 2 ND ND ND ND ND ND ND ND NA ND 2.1 ND 32.1 ND ND ND NA ND ND ND NA
Feb-08 ND ND ND ND ND ND ND ND ND NA ND 9.1 ND 8.5 ND ND ND NA ND ND ND NDAug-08 ND ND ND ND ND ND ND ND ND NA ND ND ND 3.2 ND ND ND NA ND ND ND ND
Feb-09 ND ND ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Aug-09 ND ND ND ND ND ND ND ND ND NA ND 5.9 ND 17.2 ND ND ND NA ND ND ND NDFeb-10 1.9 ND ND ND ND ND ND ND ND NA ND 2.6 ND 5.9 ND ND ND NA ND ND ND ND
Aug-10 ND ND ND ND ND ND ND ND ND NA ND 6.3 ND 20.3 ND ND ND NA ND ND ND ND
24.5 9.5 24.5MW10
MW9 24 9 24
Page 4 of 8
Table 1 - Historical Groundwater Analytical Data SummaryFormer Charlotte Aircraft #3
7705 East W.T. Harris BoulevardCharlotte, North Carolina
Well ID Approximate Depth (ft bgs)Date Sampled
Tetrachloroethene (PCE)Trichloroethene (TCE)cis-1,2 Dichloroethene1,1 Dichloroethane1,1,2 Trichloroethane1,1,2,2 Tetrachloroethane1,2 Dichlorobenzene1,2 Dichloroethane1,2 Dichloropropane1,2,4 Trimethylbenzene1,4 DichlorobenzeneBenzeneCarbon TetrachlorideChlorobenzeneChloromethaneMethylene chlorideNaphthalenen-PropylbenzeneToluenem&pXyleneTrichlorofluoromethaneVinyl ChlorideTop Bottom
0.7 3 70 6 0.6 0.2 20 0.4 0.6 400 6 1 0.3 50 3 5 6 70 600 500 2,000 0.0315A NCAC 02L Groundwater Standards and IMACs (values in µg/L)
Screened
Interval (ft bgs)
MW11 19 4 19 Sep-99 ND ND NA ND ND ND ND ND ND NA ND ND ND ND NA ND ND NA ND ND NA ND
Sep-99 32 ND NA 14 ND ND 80 55 ND NA 180 ND ND 18 NA 170 37 NA ND 24 NA NDFeb-01 ND 3,400 NA NA ND NA NA ND NA NA NA NA ND ND NA NA NA NA NA NA NA ND
Aug-01 ND 5,400 8,100 ND ND ND ND ND ND NA ND ND ND ND ND ND NA NA ND ND ND ND
Feb-02 39 2,800 3,600 22 ND ND 96 67 ND NA 22 2.1 ND 33 ND 73 NA NA 4.2 74 ND 1.5
Feb-03 ND 1,900 1,300 ND ND ND ND ND ND NA ND ND ND ND ND ND NA NA ND ND ND ND
Aug-03 ND 2,200 1,600 ND ND ND ND ND ND NA ND ND ND ND ND 290 NA NA ND 180 ND NDFeb-04 67 3,200 2,300 21 ND ND 67 56 ND NA 20 2 ND 35 ND 310 250 NA 4.3 96 ND 2.7
Aug-04 110 3,400 2,700 41 ND ND 56 94 ND NA 17 1.9 ND 71 ND 270 NA NA 3.6 76 ND ND
Feb-05 ND 3,200 2,300 ND ND ND ND ND ND NA ND 1.9 ND ND ND 280 NA NA ND ND ND ND
Aug-05 ND 3,700 2,500 ND ND ND ND ND ND NA ND 1.9 ND ND ND ND NA NA ND ND ND ND
Apr-06 ND 3,300 2,900 ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND NDAug-06 ND 3,900 3,100 ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Feb-07 ND 2,400 1,300 ND ND ND ND ND ND NA ND ND ND ND ND 270 ND NA ND ND ND ND
Aug-07 ND 2,180 2,310 ND ND ND ND ND ND NA ND ND ND ND ND 270 ND NA ND ND ND NA
Feb-08 ND 3,360 2,300 ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Aug-08 ND 3,760 3,010 ND ND ND ND ND ND NA ND ND ND ND ND 204 ND NA ND ND ND NDFeb-09 ND 3,440 2,290 ND ND ND ND ND ND NA ND ND ND ND ND 273 ND NA ND ND ND ND
Aug-09 62.8 2,430 2,990 33.1 ND ND 95.1 55.4 ND NA 17.7 ND ND 37.7 ND 157 154 NA ND 44.1 ND ND
Feb-10 39.7 1,380 955 16.4 ND ND 59.5 40.4 ND NA 14.3 ND ND 13.9 ND 156 66.1 NA ND 34.3 ND ND
Aug-10 59.4 2,540 1,970 31.2 ND ND 89.9 54.8 ND NA 18.3 ND ND 24.9 ND 176 190 NA ND 63.6 ND ND
Feb-11 37.4 2,350 2,150 30.4 ND ND 95.8 60.2 ND NA 18.4 ND ND 30.1 ND 166 178 NA ND 52.4 ND NDJan-12 40 2,450 1,870 ND ND ND 95.8 58 ND NA 17 ND ND 54 ND 185 276 NA ND 59 ND ND
Jan-14 38 J 3,300 2,100 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Nov-16 75.3 3,950 6,730 58.6 NA NA 105 36.2 NA 909 21.3 1.8 NA 42.6 NA 35.1 179 122 6 NA NA 0.93
MW13 29.5 14.5 29.5 Sep-99 ND 1 NA ND ND ND ND ND ND NA ND ND ND ND NA ND ND NA ND ND NA NDMW1419.5 3 18 Sep-99 ND ND NA ND ND ND ND ND ND NA ND ND ND ND NA ND ND NA ND ND NA ND
MW15 19.5 3 18 Sep-99 ND ND NA ND ND ND ND ND ND NA ND ND ND ND NA ND ND NA ND ND NA NDSep-99 98 163 NA ND ND ND 10 4 5 NA 2 ND 12 ND NA ND ND NA ND ND NA ND
Feb-01 70 210 NA NA ND NA NA ND NA NA NA NA 10 ND NA NA NA NA NA NA NA ND
Aug-01 50 190 ND ND ND ND ND ND ND NA ND ND 18 ND ND ND NA NA ND ND ND NDFeb-02 18 150 1.6 ND ND ND ND 2.4 2.1 NA ND ND 11 ND ND ND NA NA ND ND ND ND
Feb-03 9 100 ND ND ND ND ND ND ND NA ND ND ND ND ND ND NA NA ND ND ND NDAug-03 50 170 ND ND ND ND ND ND ND NA ND ND 9.7 ND ND ND NA NA ND ND ND ND
Feb-04 69 91 3.1 ND ND ND ND ND ND NA ND ND 6.2 ND ND ND ND NA ND ND ND ND
Aug-04 89 160 4.3 ND ND ND ND 2.7 ND NA ND ND 14 ND ND ND NA NA ND ND ND ND
Feb-05 60 120 ND ND ND ND ND ND ND NA ND ND 7.7 ND ND ND NA NA ND ND ND ND
Apr-06 310 250 7.1 ND ND ND ND ND ND NA ND ND 7.6 ND ND ND ND NA ND ND ND ND
Aug-06 160 270 ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Feb-07 200 190 ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Aug-07 219 236 12.8 ND ND ND ND ND ND NA ND ND 26.5 ND ND ND ND NA ND ND ND NA
Feb-08 161 240 ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND NDAug-08 187 256 17.1 ND ND ND ND ND ND NA ND ND 22.6 ND ND ND ND NA ND ND ND ND
Feb-09 144 293 ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Aug-09 166 259 10.8 ND ND ND ND 1.8 1.5 NA ND ND 11.6 ND ND ND ND NA ND ND ND ND
Feb-10 169 175 7.1 ND ND ND ND 1 1.5 NA ND ND 5.2 ND ND ND ND NA ND ND ND ND
Aug-10 284 250 11 ND ND ND ND 1.4 ND NA ND ND 7 ND ND ND ND NA ND ND ND ND
MW12
MW16
(Destroyed)19.5 3 18
20 5
MW16A 5 20
20
20
Page 5 of 8
Table 1 - Historical Groundwater Analytical Data SummaryFormer Charlotte Aircraft #3
7705 East W.T. Harris BoulevardCharlotte, North Carolina
Well ID Approximate Depth (ft bgs)Date Sampled
Tetrachloroethene (PCE)Trichloroethene (TCE)cis-1,2 Dichloroethene1,1 Dichloroethane1,1,2 Trichloroethane1,1,2,2 Tetrachloroethane1,2 Dichlorobenzene1,2 Dichloroethane1,2 Dichloropropane1,2,4 Trimethylbenzene1,4 DichlorobenzeneBenzeneCarbon TetrachlorideChlorobenzeneChloromethaneMethylene chlorideNaphthalenen-PropylbenzeneToluenem&pXyleneTrichlorofluoromethaneVinyl ChlorideTop Bottom
0.7 3 70 6 0.6 0.2 20 0.4 0.6 400 6 1 0.3 50 3 5 6 70 600 500 2,000 0.0315A NCAC 02L Groundwater Standards and IMACs (values in µg/L)
Screened
Interval (ft bgs)
Sep-99 7 17 NA ND ND ND ND ND ND NA ND ND ND ND NA ND ND NA ND ND NA ND
Feb-01 17 26 NA NA ND NA NA ND NA NA NA NA ND ND NA NA NA NA NA NA NA NDAug-01 19 30 25 ND ND ND ND ND ND NA ND ND ND ND ND 4.6 NA NA ND ND ND ND
Feb-02 18 23 17 ND ND ND ND ND ND NA ND ND ND ND ND ND NA NA ND ND ND ND
Feb-03 8 17 19 ND ND ND ND ND ND NA ND ND ND ND ND ND NA NA ND ND ND ND
Aug-03 19 23 30 ND ND ND ND ND ND NA ND ND ND ND ND ND NA NA ND ND ND ND
Feb-04 17 17 18 ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND NDAug-04 4.3 4.4 4.1 ND ND ND ND ND ND NA ND ND ND ND ND ND NA NA ND ND ND ND
Feb-05 7.9 12 11 ND ND ND ND ND ND NA ND ND ND ND ND ND NA NA ND ND ND ND
Apr-06 4.2 36 3.2 ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Aug-06 3.8 39 3 ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND NDFeb-07 2.2 22 2.3 ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Aug-07 3.6 38.6 7.7 ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND NA
Feb-08 3.3 39.3 2.8 ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Aug-08 2.5 41.2 1.1 ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Feb-09 2.3 36 ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND NDAug-09 2 28.2 4.3 ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Feb-10 1.9 14.8 2.5 ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Aug-10 2.3 21.7 3.9 ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Feb-11 1.1 23.8 4 ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Jan-12 0.85 17.5 2.4 ND ND ND ND ND ND NA ND ND 0.2 ND ND ND ND NA ND ND ND NDJan-14 ND 1.8 0.2 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Sep-99 ND ND NA ND ND ND ND ND ND NA ND ND ND ND NA ND ND NA ND ND NA ND
Feb-01 ND ND NA NA ND NA NA ND NA NA NA NA ND ND NA NA NA NA NA NA NA ND
Aug-01 ND ND ND ND ND ND ND ND ND NA ND ND ND ND ND ND NA NA ND ND ND ND
Feb-02 ND ND ND ND ND ND ND ND ND NA ND ND ND ND ND ND NA NA ND ND ND NDFeb-03 ND ND ND ND ND ND ND ND ND NA ND ND ND ND ND ND NA NA ND ND ND ND
Aug-03 ND ND ND ND ND ND ND ND ND NA ND ND ND ND ND ND NA NA ND ND ND NDFeb-04 ND ND ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Aug-04 ND ND ND ND ND ND ND ND ND NA ND ND ND ND ND ND NA NA ND ND ND ND
Feb-05 ND ND ND ND ND ND ND ND ND NA ND ND ND ND ND ND NA NA ND ND ND NDApr-06 6.5 11 5.7 ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Aug-06 3.8 6.8 2.8 ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND NDFeb-07 4.1 6.8 2.8 ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Aug-07 4.1 8.1 3.9 ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Feb-08 2.5 6.4 1.9 ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND NDAug-08 4.1 9.4 1.6 ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Feb-09 2.2 5.8 ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND NDAug-09 3 6.6 1.9 ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Feb-10 ND ND ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Aug-10 2.1 3 ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Sep-99 ND 1 NA ND ND ND ND ND ND NA ND ND ND ND NA ND ND NA ND ND NA NDFeb-01 ND ND NA NA ND NA NA ND NA NA NA NA ND ND NA NA NA NA NA NA NA ND
Aug-01 ND ND ND ND ND ND ND ND ND NA ND ND ND ND ND ND NA NA ND ND ND ND
Feb-02 ND ND ND ND ND ND ND ND ND NA ND ND ND ND ND ND NA NA ND ND ND ND
Feb-03 ND ND ND ND ND ND ND ND ND NA ND ND ND ND ND ND NA NA ND ND ND ND
Aug-03 ND ND ND ND ND ND ND ND ND NA ND ND ND ND ND ND NA NA ND ND ND NDFeb-04 ND ND ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Aug-04 ND ND ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Feb-05 ND ND ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
MW17 (Destroyed)
MW17A
19.5
MW18 (Destroyed)
MW18A
MW19 (Destroyed)
20 10 20
19.5 3 18
20 5 20
19.5 183
3 18
Page 6 of 8
Table 1 - Historical Groundwater Analytical Data SummaryFormer Charlotte Aircraft #3
7705 East W.T. Harris BoulevardCharlotte, North Carolina
Well ID Approximate Depth (ft bgs)Date Sampled
Tetrachloroethene (PCE)Trichloroethene (TCE)cis-1,2 Dichloroethene1,1 Dichloroethane1,1,2 Trichloroethane1,1,2,2 Tetrachloroethane1,2 Dichlorobenzene1,2 Dichloroethane1,2 Dichloropropane1,2,4 Trimethylbenzene1,4 DichlorobenzeneBenzeneCarbon TetrachlorideChlorobenzeneChloromethaneMethylene chlorideNaphthalenen-PropylbenzeneToluenem&pXyleneTrichlorofluoromethaneVinyl ChlorideTop Bottom
0.7 3 70 6 0.6 0.2 20 0.4 0.6 400 6 1 0.3 50 3 5 6 70 600 500 2,000 0.0315A NCAC 02L Groundwater Standards and IMACs (values in µg/L)
Screened
Interval (ft bgs)
Sep-99 79 45 NA ND ND ND ND ND ND NA ND ND ND ND NA ND ND NA ND ND NA ND
Feb-01 110 44 NA NA ND NA NA ND NA NA NA NA ND ND NA NA NA NA NA NA NA NDAug-01 160 68 ND ND ND ND ND ND ND NA ND ND ND ND ND ND NA NA ND ND ND ND
Feb-02 110 33 3.3 ND ND ND ND ND ND NA ND ND ND ND ND ND NA NA ND ND ND ND
Feb-03 57 29 3.2 ND ND ND ND ND ND NA ND ND ND ND ND ND NA NA ND ND ND ND
Aug-03 120 39 ND ND ND ND ND ND ND NA ND ND ND ND ND ND NA NA ND ND ND ND
Feb-04 100 26 3 ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND NDAug-04 150 35 4.2 ND ND ND ND ND ND NA ND ND ND ND ND ND NA NA ND ND ND ND
Feb-05 97 25 ND ND ND ND ND ND ND NA ND ND ND ND ND ND NA NA ND ND ND ND
Apr-06 370 170 10 ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Aug-06 220 67 69 ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND NDFeb-07 300 100 ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Aug-07 215 65.9 50.9 ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Feb-08 250 126 ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Aug-08 158 69.1 45.8 ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Feb-09 281 123 ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND NDAug-09 247 89.4 17.7 ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA 1.1 ND ND ND
Feb-10 246 67.2 3.1 ND ND ND ND ND ND NA ND ND 2.7 ND ND ND ND NA ND ND ND ND
Aug-10 366 124 7.5 ND ND ND ND ND ND NA ND ND 2.7 ND ND ND ND NA ND ND ND ND
Jan-00 ND ND NA ND ND ND ND ND ND NA ND ND ND ND NA ND ND NA ND ND NA ND
Feb-01 ND ND NA NA ND NA NA ND NA NA NA NA ND ND NA NA NA NA NA NA NA ND
Aug-01 ND ND ND ND ND ND ND ND ND NA ND ND ND ND ND ND NA NA ND ND ND NDFeb-02 ND ND ND ND ND ND ND ND ND NA ND ND ND ND ND ND NA NA ND ND ND ND
Feb-03 ND ND ND ND ND ND ND ND ND NA ND ND ND ND ND ND NA NA ND ND ND ND
Aug-03 ND ND ND ND ND ND ND ND ND NA ND ND ND ND ND ND NA NA ND ND ND ND
Feb-04 ND ND ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Aug-04 ND ND ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND NDFeb-05 ND ND ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Aug-05 ND ND ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Apr-06 ND ND ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Aug-06 ND ND ND ND ND ND ND ND ND NA ND ND ND ND 5.2 ND ND NA ND ND ND ND
Feb-07 ND ND ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND NDAug-07 ND ND ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Feb-08 ND ND ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Feb-09 ND ND ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Aug-09 ND ND ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Feb-10 ND ND ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND NDAug-10 ND ND ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Nov-16 1.43 ND ND ND NA NA ND ND NA ND ND ND NA ND NA ND ND ND ND NA NA ND
Jan-00 ND 1.3 NA ND ND ND ND ND ND NA ND ND ND ND NA ND ND NA ND ND NA ND
Feb-01 ND ND NA NA ND NA NA ND NA NA NA NA ND ND NA NA NA NA NA NA NA NDAug-01 ND 2.4 ND ND ND ND ND ND ND NA ND ND ND ND ND ND NA NA ND ND ND ND
Feb-02 ND 1.4 ND ND ND ND ND ND ND NA ND ND ND ND ND ND NA NA ND ND ND ND
Aug-02 ND 4.4 ND ND ND ND ND ND ND NA ND ND ND ND ND ND NA NA ND ND ND ND
Feb-03 ND ND ND ND ND ND ND ND ND NA ND ND ND ND ND ND NA NA ND ND ND ND
Aug-03 ND 2.9 ND ND ND ND ND ND ND NA ND ND ND ND ND ND NA NA ND ND ND NDFeb-04 ND 1.3 ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Aug-04 ND 13 ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Feb-05 ND 3.6 ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Aug-05 ND ND ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Apr-06 ND 1.9 ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND NDAug-06 ND 18 ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Feb-07 ND 1.9 ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Aug-07 ND 20.1 ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Feb-08 ND 7 ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Aug-08 ND 28 ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND NDFeb-09 ND 6.3 ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Aug-09 ND 9.2 ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Feb-10 ND ND ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Aug-10 ND 6.7 ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Feb-11 ND 5.3 ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND NDJan-12 ND 3.56 ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Jan-14 ND 0.84 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA
MW22
MW20 (Destroyed)
MW20A
MW21
20 5 20
18
18 3 18
18.5 3 18
19.5 3
Page 7 of 8
Table 1 - Historical Groundwater Analytical Data SummaryFormer Charlotte Aircraft #3
7705 East W.T. Harris BoulevardCharlotte, North Carolina
Well ID Approximate Depth (ft bgs)Date Sampled
Tetrachloroethene (PCE)Trichloroethene (TCE)cis-1,2 Dichloroethene1,1 Dichloroethane1,1,2 Trichloroethane1,1,2,2 Tetrachloroethane1,2 Dichlorobenzene1,2 Dichloroethane1,2 Dichloropropane1,2,4 Trimethylbenzene1,4 DichlorobenzeneBenzeneCarbon TetrachlorideChlorobenzeneChloromethaneMethylene chlorideNaphthalenen-PropylbenzeneToluenem&pXyleneTrichlorofluoromethaneVinyl ChlorideTop Bottom
0.7 3 70 6 0.6 0.2 20 0.4 0.6 400 6 1 0.3 50 3 5 6 70 600 500 2,000 0.0315A NCAC 02L Groundwater Standards and IMACs (values in µg/L)
Screened
Interval (ft bgs)
MW23 25.2 10 25 Nov-16 ND ND ND ND NA NA ND ND NA ND ND ND NA ND NA ND ND ND ND NA NA ND
Sep-00 ND ND NA ND ND ND ND ND ND NA ND ND ND ND ND NA ND NA ND ND 4,200 NDFeb-01 ND 12,000 NA NA ND NA NA ND NA NA NA NA ND ND NA NA NA NA NA NA NA ND
Aug-01 ND 13,000 ND ND ND ND ND ND ND NA ND ND ND ND ND ND NA NA ND ND ND ND
Feb-02 ND 8,000 ND ND ND ND ND ND ND NA ND ND ND ND ND ND NA NA ND ND ND ND
Aug-02 ND 15,000 ND ND ND ND ND ND ND NA ND ND ND ND ND ND NA NA ND ND ND ND
Feb-03 ND 25,000 ND ND ND ND ND ND ND NA ND ND ND ND ND ND NA NA ND ND ND NDAug-03 ND 13,000 ND ND ND ND ND ND ND NA ND ND ND ND ND ND NA NA ND ND ND ND
Feb-04 13 9,500 340 ND ND ND 25 8.9 ND NA 17 ND ND 2.4 ND ND 3.8 NA ND ND ND 3.1Aug-04 12 12,000 200 ND ND ND 3.9 9.7 ND NA 5.3 ND ND 4.1 ND ND NA NA ND ND ND ND
Feb-05 ND 8,400 350 ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Aug-05 ND 11,000 490 ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND NDApr-06 ND 15,000 310 ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Aug-06 ND 14,000 ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Feb-07 ND 14,000 ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Aug-07 ND 17,100 ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Feb-08 ND 22,900 ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND NDAug-08 ND 25,700 ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Feb-09 ND 23,000 ND ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Aug-09 ND 23,800 548 ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Feb-10 337 17,800 403 ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Aug-10 182 22,200 506 ND ND ND ND ND ND NA ND ND ND ND ND 610 ND NA ND ND ND NDFeb-11 ND 26,300 595 ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Jan-12 ND 336 202 ND ND ND ND ND ND NA ND ND ND ND ND ND ND NA ND ND ND ND
Jan-14 44 J 18,000 550 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA
Nov-16 5.97 2,350 70.1 ND NA NA 24.5 0.582 NA ND 7.02 ND NA ND NA ND 1.29 ND ND NA NA ND
Notes:
1. Data presented in this table is summarized from historical reports and documents publicly available from the North Carolina Department of Environmental Quality online Laserfiche database.2. Groundwater 2L Standards refer to the Title 15A North Carolina Administrative Code (NCAC) 2L Groundwater Quality Standards, amended in April 2013.
3. IMACs indicate Interim Maximum Allowable Concentrations.4. Only constituents that exceed a 2L Groundwater Standard or IMAC in at least one sampling event are included in this table.
5. -- indicates screen depth information not available.6. Concentrations highlighted in yellow indicate exceedances of the Groundwater 2L or IMAC Standards.7. Concentrations in bold indicate the highest recorded concentration for a given well and constituent.
8. µg/L indicates micrograms per liter.9. ft bgs indicates feet below ground surface.
10. J indicates estimated concentration above the laboratory Method Detection Limit (MDL) and below the Reporting Limit (RL). 11. ND indicates Not Detected above the laboratory MDL.12. NA indicates Not Analyzed.
61.8RW1 56 61
Page 8 of 8

FIGURES
±
Brownfields Site Boundary
CAC Property Boundary
Site Location
7705 East W.T. Harris Boulevard
Charlotte, North Carolina
May 2018 1
Figure
Raleigh, NC
Notes:
1. USGS National Map provided by ESRI online database.
2. CAC indicates Charlotte Aircraft Corporation.
3. Parcel boundaries provided by Mecklenburg County.N:\GN6502 Harris Boulevard\GIS\MXD\Figure 1 - Site Location.mxd ; 2,000 0 2,0001,000 Feet
East W .T. H arris B lvdDelta Landing RoadHickory Grove Christian School Residential properties
Eastern CAC Parcel
Southern CAC Parcel
Site Layout
7705 East W.T. Harris Boulevard
Charlotte, North Carolina
May 2018
250 0 250125
Feet
2
Figure
Raleigh, NC
Source Area Excavation
Notes:
1. Parcel boundaries provided by Mecklenburg County.
2. The Brownfields Site consists of Parcel ID number 10915107.
3. K Sade also plans to redevelop the Charlotte Aircraft Corporations (CAC)
Parcels 10915106 and 10915110; these parcels are not included in the
Brownfields Agreement.
4. Reference 23 July 2000 Source Area Remediation Report. Approximately
140 tons of trichloroethene (TCE)-impacted soil were excavated and thermally
treated on-Site.
5. Per a 1995 UST Leak Reporting Form. The USTs were removed prior to
1996.
6. Building descriptions are in reference to a October 1994 Phase I
Environmental Site Assessment performed by T.E. Scott Construction.
Former Gasoline UST Former Aviation Fuel USTs
Main Office
Guard House
Sales Office
Building 23
4
5
CAC Property Boundary
5
4Approximate Source Area Excavation (Year 2000)
Brownfields Site
Approximate Former UST Location
Legend
±
<
<
<
<<<
<<<<<
<
<
<<
<
<
<
<
<
<<
<
<
<<
<

MW-6
MW-8
MW-9
MW-7
MW-5
RW-1
MW-1
MW-4
MW-2
MW-3
DMW-5
MW-23
MW-22
MW-21
MW-13
DMW-4
MW-10
DMW-3
MW-12
DMW-2
DMW-1
MW-11MW-18A
MW-17A
MW-20A
MW-16A
±
Historical Groundwater Results
7705 East W.T. Harris Boulevard
Charlotte, North Carolina
May 2018
150 0 15075
Feet
3
Figure
Raleigh, NC
Notes:
1. Parcel boundaries provided by Mecklenburg County.
2. The historically highest detected concentration and the most recent analytical result are
displayed for each well for tetrachloroethene (PCE), trichloroethene (TCE), and cis-1,2
dichloroethene (cis-1,2 DCE). Results with only one value indicate the most recent detection is
also the highest historical detection. Concentrations that exceed 2L standards are highlighted in
yellow.
3. All units are in micrograms per liter (µg/L).
4. ND = Not detected; NA = Not analyzed.
5. Monitoring well locations are approximated based on S&ME's Environmental Assessment
Report, dated 30 January 2017.
6. Groundwater 2L Standards refer to the Title 15A North Carolina Administrative Code 2L
Groundwater Quality Standards, amended in April 2013.
7. The "Inferred extent of volatile organic compounds (VOCs) above one or more 2L Standards"
contour is based on the most recent sampling event for each well, including non PCE-related
compounds (e.g., benzene in MW-10).
8. ft BLS indicates feet below land surface.
9. Approximately 140 tons of TCE-impacted soil were excavated and thermally treated on-Site, as
referenced in the 23 July 2000 Source Area Remediation Report.O:\GN6502 Harris Boulevard\GIS\MXD\Figure 3 - Groundwater Data.mxd264 Feb-10
170 Jan-14
6.2 Jan-12
ND Jan-14
PCE
TCE
cDCE
Jan-14
DMW4 (unknown)
740
PCE
TCE
cDCE
ND
ND
ND
MW-1 (5-20)
Nov-16
Nov-16
Nov-16
PCE
TCE
cDCE
1
ND
NA
Sep-99
Sep-99
MW-3 (5-20)
NA
PCE
TCE
ND
7
NA
MW-2 (5-20)
cDCE
Sep-99
Sep-99
NA
7,680 Aug-08
7,000 Jan-14
17,900 Aug-08
9,500 Jan-14
68 Jan-12
36 Jan-14
TCE
cDCE
PCE
DMW3 (unknown)
56.9 Aug-10
ND Nov-16
15,000 Apr-06
1,220 Nov-16
PCE
TCE
cDCE
DMW2 (56-61)
9,670 Nov-16
1 Sep-99
ND Nov-16
PCE
TCE
cDCE
ND
ND
Nov-16
Nov-16
MW-4 (5-20)
PCE
TCE
cDCE
MW-11 (4-19)
ND
ND
NA
Sep-99
Sep-99
NA
24 Aug-04
3.6 Jan-14
1.9 Feb-02
0.29 Jan-14
PCE
TCE
ND
MW-8 (9-24)
cDCE Jan-12
1,500 Feb-01
160 Jan-14
350 Sep-99
72 Jan-14
67 Aug-03
19 Jan-14
PCE
TCE
cDCE
MW-9 (9-24)
5.9 Aug-06
ND Aug-10
2 Sep-99
ND Aug-10
cDCE ND
PCE
TCE
MW-10 (9.5-24.5)
Aug-10
4.2 Apr-06
ND Jan-14
41.2 Jan-08
1.8 Jan-14
7.7 Apr-07
0.2 Jan-14
PCE
TCE
cDCE
MW-17A (10-20)
110 Aug-04
75.3 Nov-16
5,400 Aug-01
3,950 Nov-16
8,100 Aug-01
6,730 Nov-16
cDCE
PCE
TCE
MW-12 (5-20)
370 Apr-06
366 Aug-10
170 Apr-06
124 Aug-10
69 Aug-06
7.5 Aug-10
MW-20A (10-20)
PCE
TCE
cDCE
PCE
TCE
cDCE
ND
ND
3.1
DMW1 (44-49)
Nov-16
Nov-16
Nov-16
6.5 Apr-06
2.1 Aug-10
11 Apr-06
3 Aug-10
5.7 Apr-06
ND Aug-10
PCE
TCE
MW-18A (10-20)
cDCE
28 Aug-08
0.84 Jan-14
PCE
TCE
cDCE
MW-22 (3-18)
ND
ND Jan-12
Jan-14
480 Sep-99
20 Jan-14
3,600 Sep-99
8.4 Jan-14
20,000 Feb-00
54 Jan-14
PCE
TCE
cDCE
MW-5 (5-20)1,600 Feb-01
375 Aug-10
620 Feb-01
72.4 Aug-10
280 Aug-01
10.5 Aug-10
PCE
TCE
cDCE
MW-7 (5-20)
cDCE
ND
ND
1
PCE
TCE
DMW5 (55-60)
Nov-16
Nov-16
Nov-16
PCE
TCE
ND
ND
ND
MW-23 (10-25)
cDCE
Nov-16
Nov-16
Nov-16
cDCE
1.43
ND
ND
PCE
TCE
MW-21 (3-18)
Nov-16
Nov-16
Nov-16
310 Apr-06
284 Jan-10
293 Jan-09
250 Jan-10
17.1 Apr-08
11 Jan-10
PCE
TCE
MW-16A (5-20)
cDCE
Constituent Abbreviation 2L Standard (µg/L)
Tetrachloroethene PCE 0.7
Trichloroethene TCE 3
cis-1,2-dichloroethene cDCE 70
Highest
Detected
Concentration
Date Sampled
Most Recent
Concentration Date Sampled
Well ID (Well Screen ft BLS)
Constituent
Legend
<Approximate Monitoring Well Location
<Well with most recent detection above 2L
Standards
Inferred extent of VOCs above one or
more 2L Standards
Brownfields Site
Approximate Source Area Excavation
(Year 2000)
337 Feb-10
5.97 Nov-16
26,300 Feb-11
2,350 Nov-16
595 Feb-11
70.1 Nov-16
cDCE
RW1 (56-61)
PCE
TCE
PCE
TCE
cDCE
MW-13 (14.5-29.5)
ND
1
NA
Sep-99
Sep-99
NA
NA
Sep-99
Sep-99
ND
2
NAcDCE
PCE
TCE
MW-6 (5-20)
!!
!!
!!
!!!!!!
!!
!!!!
!!
!!
<
<
<
<<<
<<<
<<
<
<
<<
<
<
<
<
<
<<
<
<
<<
<
MW-6
MW-8
MW-9
MW-7
MW-5
RW-1
MW-1 MW-4
MW-2
MW-3
DMW-5
MW-23
MW-22
MW-21
MW-13
DMW-4
MW-10
DMW-3
MW-12
DMW-2
DMW-1
MW-11MW-18A
MW-17A
MW-20A MW-16A
±
<Approximate Monitoring Well Location
!!Proposed Groundwater Sampling Location
Inferred extent of VOCs above one or more 2L Standards
Approximate Source Area Excavation (Year 2000)
Brownfields Site
Proposed Groundwater Sampling Locations
7705 East W.T. Harris Boulevard
Charlotte, North Carolina
May 2018 4
Figure
Raleigh, NC
Notes:
1. Parcel boundaries provided by Mecklenburg County.
2. Monitoring well locations are approximated based on S&ME's Environmental
Assessment Report, dated 30 January 2017.
3. Groundwater 2L Standards refer to the Title 15A North Carolina Administrative
Code 2L Groundwater Quality Standards, amended in April 2013.
4. The "Inferred extent of volatile organic compounds (VOCs) above one or more 2L
Standards" contour is based on the most recent sampling event for each well,
including non PCE-related compounds (e.g., benzene in MW-10).
5. Approximately 140 tons of trichloroethene (TCE)-impacted soil were excavated and
thermally treated on-Site, as referenced in the 23 July 2000 Source Area Remediation
Report.O:\GN6502 Harris Boulevard\GIS\MXD\Figure 4 - Proposed Groundwater Sampling.mxd150 0 15075 Feet
&>
&>
&>
&>
&>
&>
&>
Source: Esri, DigitalGlobe, GeoEye, Earthstar Geographics, CNES/Airbus DS, USDA, USGS,AeroGRID, IGN, and the GIS User Community
Proposed Soil Sampling Locations
7705 East W.T. Harris BoulevardCharlotte, North Carolina
August 2018 5Figure
Raleigh, NC
100 0 10050 FeetNotes:1. Parcel boundaries provided by Mecklenburg County.2. Approximately 140 tons of TCE-impacted soil were excavated and thermally treated on-Site, as referenced in the 23 July 2000 Source Area Remediation Report.3. Groundwater 2L Standards refer to the Title 15A North Carolina Administrative Code 2LGroundwater Quality Standards, amended in April 2013.4. The "Inferred Extent of VOCs above one or more 2L Standards" contour is based onthe most recent sampling event for each well, including non PCE-related compounds(e.g., benzene in MW-10).5. Per a 1995 UST Leak Reporting Form. The USTs were removed prior to 1996.
±
Legend
&>Proposed Surficial Soil Locations
Inferred extent of VOCs above one or more 2L Standards
Brownfields Site
Approximate Source Area Excavation (Year 2000)
Approximate Former UST Location5
Proposed Soil Gas Sampling Locations
7705 East W.T. Harris BoulevardCharlotte, North Carolina
August 2018 6Figure
Raleigh, NC
100 0 10050 FeetNotes:1. Parcel boundaries provided by Mecklenburg County.2. Approximately 140 tons of TCE-impacted soil were excavated and thermally treated on-Site, as referenced in the 23 July 2000 Source Area Remediation Report.3. Groundwater 2L Standards refer to the Title 15A North Carolina Administrative Code 2LGroundwater Quality Standards, amended in April 2013.4. The "Inferred Extent of VOCs above one or more 2L Standards" contour is based onthe most recent sampling event for each well, including non PCE-related compounds(e.g., benzene in MW-10).5. Per a 1995 UST Leak Reporting Form. The USTs were removed prior to 1996.
±
Legend
Proposed Soil Gas Sampling Location
Inferred extent of VOCs above one or more 2L Standards
Brownfields Site
Approximate Source Area Excavation (Year 2000)
Approximate Former UST Location5
7
(Optional)
7

APPENDICES