WS-7706_7706_CA_MROP_20220916

Prepared for:

Phillips 66 Company
222 S. Church Street
Charlotte, North Carolina 28202

ACTIVE REMEDIATION MONITORING REPORT
Former ConocoPhillips Terminal No. 33441 (RM #6578)
115 South Chimney Rock Road
Greensboro, Guilford County, North Carolina

ATC Project No. P666578109

Prepared by:

ATC Associates of North Carolina, P.C.
2725 E. Millbrook Road, Suite 121
Raleigh, North Carolina 27604
Telephone [phone]

Corinne Lally
Staff Scientist
Direct Line: 919-948-7379
Email: [e-mail]

Gabriel Araos, P.E.
Branch Manager
Direct Line: 919-573-1205
Email: [e-mail]

September 16, 2022

Former ConocoPhillips Terminal No. 33441 (RM #6578)
September 16, 2022
Page i

ATC Project No. P666578109 Phillips 66 Company
TABLE OF CONTENTS

1.0 INTRODUCTION ................................................................................................................ 1
2.0 SITE BACKGROUND ....................................................................................................... 1
3.0 GROUNDWATER INVESTIGATION .............................................................................. 5
3.1 Groundwater Levels ......................................................................................... 5
3.2 Groundwater Quality ........................................................................................ 5
4.0 SUMMARY .......................................................................................................................... 6

LIST OF TABLES

Table 1: Monitoring Well Construction Details
Table 2: Historical Groundwater Elevation Data
Table 3: Groundwater Analytical Data
Table 4: Historical Groundwater Analytical Data
Table 5: Natural Attenuation Parameters

LIST OF FIGURES

Figure 1: Topographic Map
Figure 2: Site Map
Figure 3: Potential Receptor Map
Figure 4: Groundwater Elevation Contour Map – December 14, 2021
Figure 5: Dissolved Benzene Isoconcentration Contour Map
Figure 6: Dissolved MTBE Isoconcentration Contour Map

LIST OF APPENDICES

Appendix A: Laboratory Analytical Results
Appendix B: Concentration versus Time Graphs

Former ConocoPhillips Terminal No. 33441 (RM #6578)
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ATC Project No. P666578109 Phillips 66 Company

1.0 INTRODUCTION

ATC Associates of North Carolina, P.C. (ATC) was retained by Phillips 66 Company to continue active
remediation monitoring activities at the former ConocoPhillips Terminal No. 33441 located at 115 South
Chimney Rock Road in Greensboro, Guilford County, North Carolina. This report documents two quarterly
groundwater monitoring events performed in March and June 2022 and an Oxygen Releasing Substrate
(ORS) filter sock installation event in March 2022.

2.0 SITE BACKGROUND

The former ConocoPhillips Terminal No. 33441 is located at 115 South Chimney Rock Road on an
approximate 7.79-acre parcel of land in an industrial area of western Greensboro. The site is currently an
active bulk fuel distribution terminal that consists of a control office building, miscellaneous warehouse
and storage buildings, and nine bulk fuel aboveground storage tanks (ASTs), a covered bulk dispensing
loading rack, and associated process piping. The terminal is supplied with fuel and petroleum products by
Colonial Pipeline that enters the site property from the southwestern corner. The site property was sold in
2022 by Magellan Terminals Holdings, L.P. (Magellan) to Buckeye Partners, L.P. (Buckeye). A site
topographic map is presented as Figure 1 and a site map is presented as Figure 2.

The site has operated as a bulk fuel distribution terminal since the late 1950’s and is located in a
commercial/industrial area with no residential development within approximately 1,000 feet of the site.
Numerous other bulk fuel distribution terminals are located in the surrounding area. Assessment activities
were initiated following reports of impact to utilities adjacent to some of the area terminals in December
1987. A Corrective Action Plan (CAP) submitted on March 1, 1993, recommended a dual-phase
extraction (DPE) system for soil and groundwater remediation at the site, which was approved by the
North Carolina Department of Environmental Quality (NCDEQ, formerly the North Carolina Department of
Environment and Natural Resources) in November 1993. The DPE system was installed during March
1995 and operated until November 2003 when it was shut down due to contaminant concentrations
reportedly having reached asymptotic levels with no apparent plume migration.

A CAP Addendum was submitted in December 2003 recommending modifying the existing DPE system
to an air injection (AI) bio-enhancement remediation system, which was implemented following NCDEQ
approval. The AI system was started in April 2004.

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ATC Project No. P666578109 Phillips 66 Company

A second CAP Addendum was submitted in September 2006 recommending enhanced anaerobic
bioremediation to address concentrations of dissolved petroleum hydrocarbons above the Groundwater
Standards established in Title 15A of the North Carolina Administrative Code (NCAC) Subchapter 2L
Section .0202 (2L Standards). Approval for a pilot test was issued by NCDEQ; however, prior to securing
a remediation permit and a permit to use a well for injection, concentrations of dissolved petroleum
hydrocarbons in groundwater samples showed decreasing trends. As a result, operation of the AI system
continued.

An Active Remediation Monitoring Report submitted on July 30, 2013, documented Phillips 66
recommendation to temporarily shut down the AI system to observe the effect on contaminant
concentrations over time and to evaluate potential rebounding. NCDEQ concurred with Phillips 66’s
recommendation in a letter dated August 12, 2013, and consented to deactivation of the AI system for
one year.

On June 23, 2014, a gasoline release occurred under the operations of the current terminal operator,
Magellan, from a product line valve failure to Tank No. 8 in the vicinity of Phillips 66 monitoring well MW-
11. Based on a July 25, 2014, Initial Assessment Report submitted by Magellan and NCDEQ’s August 18,
2014, response, NCDEQ did not require additional assessment or cleanup following Magellan’s initial
abatement and excavation activities. Accordingly, NCDEQ did not assign a new Incident Release Number
to Magellan’s gasoline release.

On October 3, 2014, a Remediation System Evaluation was submitted concluding that the AI system was
no longer effective in reducing compound concentrations at the site. Phillips 66 recommended
permanently discontinuing operation of the AI system and removing the mechanical and electrical
components of the system from the site. Phillips 66 further recommended evaluating the effectiveness of
utilizing ORC® filter socks for further reducing the concentrations in groundwater immediately
surrounding monitoring well MW-12. In a letter dated October 20, 2014, NCDEQ concurred with Phillips
66’s recommendations to permanently discontinue operation of the AI system and evaluate the
effectiveness of ORC® filter socks in monitoring well MW-12.

On March 12, 2015, Phillips 66 submitted a “Notification of Intent to Construct or Operate Injection Wells”
to NCDEQ Division of Water Resources (DWR) Underground Injection Control (UIC) Program. On March
31, 2015, ORC® filter socks were installed in monitoring well MW-12, and an Injection Event Record was
submitted to NCDEQ on April 8, 2015.

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ATC Project No. P666578109 Phillips 66 Company

On February 18, 2016, an Active Remediation Monitoring Report was submitted documenting monitoring
activities performed between July and December 2015. Based on the laboratory analytical data,
continued quarterly sampling and semi-annual reporting was recommended.

On September 1, 2016, an Active Remediation Monitoring Report was submitted documenting monitoring
activities performed between March and July 2016 as well as the receptor survey conducted in July 2016.
The receptor survey identified a surface water body located within 500 feet of the site. A retention pond is
located on the site property that drains into Long Branch to the southeast of the site. According to the
NCDEQ Division of Water Resources, Long Branch is identified as a Water Supply (WS) IV surface water
body. No water supply wells were identified during the July 2016 receptor survey. A potential receptor
map is included as Figure 3. Based on the laboratory analytical data, continued quarterly sampling and
semi-annual reporting was recommended.

On February 21, 2017, an Active Remediation Monitoring Report was submitted documenting monitoring
activities performed between September and December 2016. Based on the laboratory analytical data,
continued quarterly sampling and semi-annual reporting was recommended.

On July 14, 2017, an Active Remediation Monitoring Report was submitted documenting monitoring
activities performed between March and June 2017. Based on the laboratory analytical data, continued
quarterly sampling and semi-annual reporting was recommended.

On March 6, 2018, an Active Remediation Monitoring Report was submitted documenting monitoring
activities performed between September and December 2017. Based on the laboratory analytical data,
continued quarterly sampling and semi-annual reporting was recommended.

On July 31, 2018, an Active Remediation Monitoring Report was submitted documenting monitoring
activities performed between March and June 2018. Based on the laboratory analytical data, continued
quarterly sampling and semi-annual reporting was recommended.

On February 28, 2019, an Active Remediation Monitoring Report was submitted documenting monitoring
activities performed between September and December 2018. Based on the laboratory analytical data,
continued quarterly sampling and semi-annual reporting was recommended.

On July 29, 2019, an Active Remediation Monitoring Report was submitted documenting monitoring
activities performed between March and June 2019. Based on the laboratory analytical data, continued
quarterly sampling and semi-annual reporting was recommended.

Former ConocoPhillips Terminal No. 33441 (RM #6578)
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ATC Project No. P666578109 Phillips 66 Company

On December 26, 2019, approximately 480 gallons of gasoline were released to the ground surface at the
Magellan terminal due to a valve failure in the manifold area near Tank No. 4 and monitoring well MW-12.
The release was reported verbally to NCDEQ on December 26, 2019. Initial abatement actions were
performed by Apex Companies, LLC (Apex), on behalf of Magellan, and included the excavation of 75
cubic yards of petroleum impacted soils and the removal of 12,549 gallons of petroleum contact water.
An Initial Assessment Report for Non-UST Releases was submitted to NCDEQ on April 2, 2020,
documenting the abatement activities and recommending no further action.

On January 31, 2020, an Active Remediation Monitoring Report was submitted documenting monitoring
activities performed between September and December 2019. Based on the laboratory analytical data,
continued quarterly sampling and semi-annual reporting was recommended.

On August 12, 2020, an Active Remediation Monitoring Report was submitted documenting monitoring
activities performed between March and June 2020. Based on the laboratory analytical data, continued
quarterly sampling and semi-annual reporting was recommended.

On April 21, 2021, an Active Remediation Monitoring Report was submitted documenting monitoring
activities performed between September and December 2020. Based on the laboratory analytical data,
continued quarterly sampling and semi-annual reporting was recommended.

ATC submitted a Notice of Intent to Construct or Operate Injection Wells (NOI) to the NCDEQ Division of
Water Resources Section on June 10, 2021, for the installation of Provectus Oxygen Releasing Substrate
(ORS) sleeves in monitoring well MW-12. On June 25, 2021, NCDEQ issued permit number WI0400570.
On August 4, 2021, ATC mobilized to the site and installed three ORS socks in monitoring well MW-12.

On August 26, 2021, an Active Remediation Monitoring Report was submitted documenting monitoring
activities performed between March and June 2021 and the ORC sock installation in August 2021. Based
on the laboratory analytical data, continued quarterly sampling and semi-annual reporting was
recommended.

On March 7, 2022, an Active Remediation Monitoring Report was submitted documenting monitoring
activities performed between September and December 2021, and the ORC sock installation in
December 2021. Based on the laboratory analytical data, continued quarterly sampling and semi-annual
reporting was recommended.

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ATC Project No. P666578109 Phillips 66 Company

3.0 GROUNDWATER INVESTIGATION

3.1 Groundwater Levels
On March 29, 2022, ATC measured groundwater elevations in wells MW-1, MW-2, MW-3, MW-5, MW-6,
MW-7, MW-8, MW-9, MW-10, MW-11, MW-12, MW-13, DW-1, DPE-6, DPE-7, DPE-9, DPE-10, DPE-11,
DPE-14, DPE-18, DPE-19, DPE-20, and DPE-22. On June 16, 2022, ATC measured groundwater elevations
in MW-1, MW-2, MW-3, MW-5, MW-6, MW-7, MW-8, MW-9, MW-10, MW-11, MW-12, MW-13, DW-1, DPE-
6, DPE-7, DPE-10, DPE-11, DPE-14, DPE-18, DPE-19, DPE-20, and DPE-22. An oil/water interface probe
was used to measure the depth to water and the presence of light non-aqueous phase liquid (LNAPL) in the
monitoring wells. Based on the June 16, 2022, gauging event, groundwater depths ranged from 4.45 feet
bgs in MW-2 to 15.38 feet bgs in MW-12. LNAPL was not detected during either sampling event. During the
March 2022 sampling event, ATC replaced the ORS socks in monitoring well MW-12.

Depth to water was measured from the top of each well casing and then converted into relative elevations
using previously established well elevations. Monitoring well construction information is included as Table 1.
Historical groundwater elevations are summarized in Table 2. A groundwater elevation contour map for the
June 2022 sampling event is included as Figure 4. Based on the water table elevations, groundwater flow is
towards the southeast.

3.2 Groundwater Quality
On March 29, 2022, and June 16, 2022, ATC collected groundwater samples from monitoring wells MW-11,
MW-12, and MW-13. Groundwater samples were collected into laboratory-approved containers, packed in
ice and delivered under chain-of-custody to SGS Accutest in Scott, Louisiana for analyses. The groundwater
samples were analyzed benzene, toluene, ethylbenzene, total xylenes (BTEX), and methyl tertiary butyl ether
(MTBE) via EPA Method 6200B. In addition, natural attenuation parameters including temperature, pH,
conductivity, turbidity, and oxygen releasing potential were measured in the monitoring wells.

Laboratory analytical results from the March 29, 2022, sampling event indicated MTBE (31.7 µg/L) was
detected above 2L Standards in MW-11, and benzene (21.9 µg/L) and MTBE (53.5 µg/L) were detected
above 2L Standards in MW-12.

Laboratory analytical results from the June 16, 2022, sampling event indicated MTBE (32.8 µg/L) was
detected above 2L Standards in MW-11. Benzene (162 µg/L) and MTBE (41.9 µg/L) were detected above
2L Standards in MW-12. No compounds exceeded the Gross Contaminant Levels (GCLs). Due to the
presence of a WS-IV surface water body within 500 feet of the site, groundwater concentrations are also
compared to the North Carolina 15A NCAC 02B Surface Water Standards and Protective Values and the

Former ConocoPhillips Terminal No. 33441 (RM #6578)
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ATC Project No. P666578109 Phillips 66 Company

Environmental Protection Agency (EPA) Recommended Water Quality Criteria (2B Standard) to determine if
concentrations exceed the most stringent of the freshwater, water supply, and human health standards by a
factor of 10 (as cited in Title 15A NCAC 02L .0506). Benzene exceeded the 2B Standard by a factor of 10 in
monitoring well MW-12 for the March and June 2022 sampling events. MTBE did not exceed the 2B
Standards by a factor of 10 during the March and June 2022 sampling events.

The groundwater laboratory analytical report is included in Appendix A and summarized in Table 3.
Dissolved isoconcentration contour maps for benzene and MTBE are included as Figures 5 and 6,
respectively. Table 4 presents historical groundwater analytical results. Historical natural attenuation
parameters are presented in Table 5. Concentration versus time and groundwater elevation versus time
graphs for monitoring wells MW-11, MW-12, and MW-13 are included in Appendix B.

4.0 SUMMARY

Two quarterly groundwater sampling events were performed in March and June 2022 for the former
ConocoPhillips Terminal No. 33441 in Greensboro, Guilford County, North Carolina. Based on field activities,
observations, and groundwater analytical results, ATC concludes the following:

 The site meets the criteria for an “Intermediate” risk site due to the presence of a retention pond and
Little Branch surface water body within 500 feet of the site with groundwater concentrations
exceeding 10 times the applicable 2B Surface Water Standards;
 Depth to groundwater measurements ranged from 4.45 feet bgs in MW-2 to 15.38 feet bgs in MW-12
(June 2022). The inferred shallow groundwater flow direction across the site is to the southeast;
 Benzene and MTBE exceeded the 2L Standards. However, they did not exceed the GCLs.
 Benzene exceeded by a factor of 10 the applicable 2B Standards in MW-12 during the March and
June 2022 sampling events; and
 Following the August 2021 ORS sock installation in monitoring well MW-12, benzene concentration
trends were decreasing until March 2022 when the concentrations indicated slight increases. After
the ORS sock replacement in March 2022, there has a been an increase in benzene concentrations.

Based on the receptor survey conducted in June 2016, the site is classified as an Intermediate risk. For the
site to be applicable for site closure the groundwater concentrations must be below the GCLs and 10 times
the 2B Standards. LNAPL must also be absent from the site. ATC will sample MW-11, MW-12, and MW-13
during the next quarterly sampling events that will take place in September and December 2022. ATC will
continue to monitor the effectiveness of the ORS sock during the next sampling event.

Former ConocoPhillips Terminal No. 33441 (RM #6578)
August 1, 2022

ATC Project No. P666578109 Phillips 66 Company

TABLES
TABLE 1
MONITORING WELL CONSTRUCTION DETAILS
FORMER CONOCOPHILLIPS TERMINAL NO. 33441 (RM 6578)
115 SOUTH CHIMNEY ROCK ROAD
GREENSBORO, NORTH CAROLINA
INCIDENT NO. 7706
Depth of
Water (feet)
Depth of
LNAPL (feet)
Groundwater
Elevation
(feet)*
MW-1 2/12/1990 2 8.5-23.5 25.0 925.30 12.51 --912.79
MW-2 2/14/1990 2 5-20 20.0 915.16 4.45 910.71
MW-3 2/14/1990 2 5-20 20.0 915.26 9.87 --905.39
MW-4 2/14/1990 2 7.5-22.5 22.5 910.89
MW-5 2/13/1990 2 4.5-19.5 20.0 912.25 6.26 --905.99
MW-6 2/13/1990 2 8.5-23.5 25.0 921.74 14.14 --907.60
MW-7 2/13/1990 2 7-22 25.0 924.77 13.69 --911.08
MW-8 2/12/1990 2 8.5-23.5 25.0 926.09 14.77 --911.32
MW-9 7/31/1990 2 4.7-19.7 20.0 924.93 13.59 --911.34
MW-10 8/2/1990 2 5-20 20.0 923.42 12.66 --910.76
MW-11 8/2/1990 2 4.3-19.3 20.0 922.60 13.44 --909.16
MW-12 8/2/1990 2 4.5-19.5 20.0 923.90 15.38 --908.52
MW-13 8/3/1990 2 4.5-19.5 20.0 925.63 13.34 --912.29
MW-14 Unknown Unknown Unknown Unknown 925.48
MW-15 Unknown Unknown Unknown Unknown 924.63
MW-16 Unknown Unknown Unknown Unknown 919.02
DW-1 Unknown 2 45-50 50.0 925.27 12.85 --912.42
DW-2 Unknown 2 60-70 75.0 925.65
DW-3 Unknown 2 33-38 38.5 919.93
DPE-1 Unknown Unknown Unknown Unknown 923.10
DPE-2 Unknown Unknown Unknown Unknown 921.55
DPE-3 Unknown Unknown Unknown Unknown 921.15
DPE-4 Unknown Unknown Unknown Unknown 920.41
DPE-5 Unknown Unknown Unknown Unknown 920.77
DPE-6 Unknown Unknown Unknown Unknown 921.03 8.46 --912.57
DPE-7 Unknown Unknown Unknown Unknown 920.98 10.49 --910.49
DPE-8 Unknown Unknown Unknown Unknown 920.93
DPE-9 Unknown Unknown Unknown Unknown 920.81
DPE-10 Unknown Unknown Unknown Unknown 920.33 9.37 --910.96
DPE-11 Unknown Unknown Unknown Unknown 920.39 9.71 --910.68
DPE-12 Unknown Unknown Unknown Unknown 921.33
DPE-13 Unknown Unknown Unknown Unknown 920.91
DPE-14 Unknown Unknown Unknown Unknown 919.98 7.69 --912.29
DPE-15 Unknown Unknown Unknown Unknown 920.41
DPE-16 Unknown Unknown Unknown Unknown 923.03
DPE-17 Unknown Unknown Unknown Unknown 922.77
DPE-18 Unknown Unknown Unknown Unknown 923.71 10.52 --913.19
DPE-19 Unknown Unknown Unknown Unknown 924.13 10.71 --913.42
DPE-20 Unknown Unknown Unknown Unknown 924.07 10.52 --913.55
DPE-21 Unknown Unknown Unknown Unknown 922.89
DPE-22 Unknown Unknown Unknown Unknown 921.76 9.24 --912.52
DPE-23 Unknown Unknown Unknown Unknown 921.57
Notes:
1. * = Corrected Groundwater Elevation = (Groundwater Elevation + (Product Thickness *0.8581))
2. Elevations are referenced to an arbitrary on-site benchmark of 100.00 feet
3. Total well depths measured from top of casing
4. LNAPL = Light Non Aqueous Phase Liquid
Well Not Measured
Converted to Sparge Well
Top of
Casing (feet)
Date Measured: 6/16/2022
Abandoned
Converted to Sparge Well
Well Destroyed
Well Not Measured
Well Not Measured
Monitoring
Well ID
Date
Installed
Well
Casing
Diameter
(Inches)
Screened
Interval
(feet)
Depth of Well
(feet)
Well Not Measured
Converted to Sparge Well
Converted to Sparge Well
Converted to Sparge Well
Converted to Sparge Well
Converted to Sparge Well
Converted to Sparge Well
Converted to Sparge Well
Converted to Sparge Well
Well Not Measured
Well Not Measured
Converted to Sparge Well
Well Not Measured
Page 1 of 1
TABLE 2
HISTORICAL GROUNDWATER ELEVATION DATA
FORMER CONOCOPHILLIPS TERMINAL NO. 33441 (RM 6578)
115 SOUTH CHIMNEY ROCK ROAD
GREENSBORO, NORTH CAROLINA
INCIDENT NO. 7706
Well ID Date Measured Top of Casing
Elevation (ft)
Depth to
Groundwater
(ft)
LNAPL
Thickness (ft)
Groundwater
Elevation (ft)
04/28/09 925.30 9.78 0.00 915.52
06/30/09 925.30 9.89 0.00 915.41
08/31/09 925.30 13.46 0.00 911.84
06/30/11 925.30 11.66 0.00 913.64
12/20/11 925.30 10.24 0.00 915.06
03/29/12 925.30 9.76 0.00 915.54
06/28/12 925.30 12.45 0.00 912.85
12/03/12 925.30 13.95 0.00 911.35
06/28/13 925.30 10.52 0.00 914.78
12/30/13 925.30 12.73 0.00 912.57
06/27/14 925.30 12.42 0.00 912.88
12/30/14 925.30 13.34 0.00 911.96
06/12/15 925.30 12.39 0.00 912.91
12/17/15 925.30 9.95 0.00 915.35
03/09/16 925.30 8.49 0.00 916.81
06/21/16 925.30 10.00 0.00 915.30
12/20/16 925.30 14.94 0.00 910.36
06/13/17 925.30 10.45 0.00 914.85
12/05/17 925.30 15.83 0.00 909.47
06/07/18 925.30 10.92 0.00 914.38
09/11/18 925.30 11.15 0.00 914.15
12/18/18 925.30 7.08 0.00 918.22
03/13/19 925.30 6.94 0.00 918.36
06/12/19 925.30 9.21 0.00 916.09
09/11/19 925.30 11.21 0.00 914.09
12/20/19 925.30 8.83 0.00 916.47
03/04/20 925.30 7.49 0.00 917.81
06/03/20 925.30 6.95 0.00 918.35
09/14/20 925.30 11.00 0.00 914.30
12/09/20 925.30 8.39 0.00 916.91
03/30/21 925.30 6.30 0.00 919.00
06/24/21 925.30 11.16 0.00 914.14
09/23/21 925.30 12.00 0.00 913.30
12/14/21 925.30 13.96 0.00 911.34
03/29/22 925.30 9.30 0.00 916.00
06/16/22 925.30 12.51 0.00 912.79
MW-1
Page 1 of 23
TABLE 2
HISTORICAL GROUNDWATER ELEVATION DATA
FORMER CONOCOPHILLIPS TERMINAL NO. 33441 (RM 6578)
115 SOUTH CHIMNEY ROCK ROAD
GREENSBORO, NORTH CAROLINA
INCIDENT NO. 7706
Well ID Date Measured Top of Casing
Elevation (ft)
Depth to
Groundwater
(ft)
LNAPL
Thickness (ft)
Groundwater
Elevation (ft)
04/28/09 915.16 2.55 0.00 912.61
06/30/09 915.16 3.21 0.00 911.95
08/31/09 915.16 5.93 0.00 909.23
06/30/11 915.16 4.34 0.00 910.82
12/20/11 915.16 2.99 0.00 912.17
03/29/12 915.16 2.22 0.00 912.94
06/28/12 915.16 4.97 0.00 910.19
12/03/12 915.16 5.18 0.00 909.98
06/28/13 915.16 2.15 0.00 913.01
12/30/13 915.16 4.35 0.00 910.81
06/27/14 915.16 4.94 0.00 910.22
12/30/14 915.16 5.08 0.00 910.08
06/12/15 915.16 4.81 0.00 910.35
12/17/15 915.16 2.58 0.00 912.58
06/21/16 915.16 3.47 0.00 911.69
12/20/16 915.16 5.65 0.00 909.51
06/13/17 915.16 3.15 0.00 912.01
12/05/17 915.16 6.41 0.00 908.75
06/07/18 915.16 3.47 0.00 911.69
09/11/18 915.16 3.80 0.00 911.36
12/18/18 915.16 1.06 0.00 914.10
03/13/19 915.16 0.50 0.00 914.66
06/12/19 915.16 2.23 0.00 912.93
09/11/19 915.16
12/20/19 915.16 1.84 0.00 913.32
03/04/20 915.16 0.98 0.00 914.18
06/03/20 915.16 0.97 0.00 914.19
09/14/20 915.16 3.41 0.00 911.75
12/09/20 915.16 1.53 0.00 913.63
03/30/21 915.16 0.00 0.00 915.16
06/24/21 915.16 3.17 0.00 911.99
09/23/21 915.16 3.63 0.00 911.53
12/14/21 915.16 4.98 0.00 910.18
03/29/22 915.16 1.88 0.00 913.28
06/16/22 915.16 4.45 0.00 910.71
Well Not Measured
MW-2
Page 2 of 23
TABLE 2
HISTORICAL GROUNDWATER ELEVATION DATA
FORMER CONOCOPHILLIPS TERMINAL NO. 33441 (RM 6578)
115 SOUTH CHIMNEY ROCK ROAD
GREENSBORO, NORTH CAROLINA
INCIDENT NO. 7706
Well ID Date Measured Top of Casing
Elevation (ft)
Depth to
Groundwater
(ft)
LNAPL
Thickness (ft)
Groundwater
Elevation (ft)
04/28/09 915.26 7.76 0.00 907.50
06/30/09 915.26 8.98 0.00 906.28
08/31/09 915.26 11.92 0.00 903.34
12/20/11 915.26 9.08 0.00 906.18
03/29/12 915.26 7.88 0.00 907.38
06/28/12 915.26 11.30 0.00 903.96
12/03/12 915.26 10.79 0.00 904.47
06/28/13 915.26 7.56 0.00 907.70
12/30/13 915.26 9.75 0.00 905.51
06/27/14 915.26 11.25 0.00 904.01
12/30/14 915.26 11.28 0.00 903.98
06/12/15 915.26 11.18 0.00 904.08
12/17/15 915.26 8.02 0.00 907.24
03/09/16 915.26 6.24 0.00 909.02
06/21/16 915.26 8.99 0.00 906.27
12/20/16 915.26 10.20 0.00 905.06
06/13/17 915.26 8.88 0.00 906.38
12/05/17 915.26 11.42 0.00 903.84
06/07/18 915.26 9.32 0.00 905.94
09/11/18 915.26 10.25 0.00 905.01
12/18/18 915.26 6.50 0.00 908.76
03/13/19 915.26 5.12 0.00 910.14
06/12/19 915.26 7.24 0.00 908.02
09/11/19 915.26 9.61 0.00 905.65
12/20/19 915.26 6.81 0.00 908.45
03/04/20 915.26 5.27 0.00 909.99
06/03/20 915.26 5.64 0.00 909.62
09/14/20 915.26 9.30 0.00 905.96
12/09/20 915.26 6.29 0.00 908.97
03/30/21 915.26 4.24 0.00 911.02
06/24/21 915.26 8.23 0.00 907.03
09/23/21 915.26 9.18 0.00 906.08
12/14/21 915.26 9.14 0.00 906.12
03/29/22 915.26 6.61 0.00 908.65
06/16/22 915.26 9.87 0.00 905.39
MW-4 04/28/09 910.89 Well Destroyed
MW-3
Page 3 of 23
TABLE 2
HISTORICAL GROUNDWATER ELEVATION DATA
FORMER CONOCOPHILLIPS TERMINAL NO. 33441 (RM 6578)
115 SOUTH CHIMNEY ROCK ROAD
GREENSBORO, NORTH CAROLINA
INCIDENT NO. 7706
Well ID Date Measured Top of Casing
Elevation (ft)
Depth to
Groundwater
(ft)
LNAPL
Thickness (ft)
Groundwater
Elevation (ft)
04/28/09 912.25 5.62 0.00 906.63
06/30/09 912.25 5.73 0.00 906.52
08/31/09 912.25 7.25 0.00 905.00
06/30/11 912.25 6.29 0.00 905.96
12/20/11 912.25 5.92 0.00 906.33
03/29/12 912.25 5.73 0.00 906.52
06/28/12 912.25 7.04 0.00 905.21
12/03/12 912.25 7.58 0.00 904.67
06/28/13 912.25 3.38 0.00 908.87
12/30/13 912.25 5.55 0.00 906.70
06/27/14 912.25 7.00 0.00 905.25
12/30/14 912.25 7.29 0.00 904.96
06/12/15 912.25 6.97 0.00 905.28
12/17/15 912.25 4.65 0.00 907.60
03/09/16 912.25 4.77 0.00 907.48
06/21/16 912.25 5.53 0.00 906.72
12/20/16 912.25 7.24 0.00 905.01
06/13/17 912.25 7.58 0.00 904.67
12/05/17 912.25 8.02 0.00 904.23
06/07/18 912.25 5.70 0.00 906.55
09/11/18 912.25 5.96 0.00 906.29
12/18/18 912.25 4.00 0.00 908.25
03/13/19 912.25 4.30 0.00 907.95
06/12/19 912.25 4.61 0.00 907.64
09/11/19 912.25 5.65 0.00 906.60
12/20/19 912.25 4.67 0.00 907.58
03/04/20 912.25 4.51 0.00 907.74
06/03/20 912.25 4.32 0.00 907.93
09/14/20 912.25 5.79 0.00 906.46
12/09/20 912.25 4.43 0.00 907.82
03/30/21 912.25 3.83 0.00 908.42
06/24/21 912.25 5.37 0.00 906.88
09/23/21 912.25 5.18 0.00 907.07
12/14/21 912.25 6.53 0.00 905.72
03/29/22 912.25 5.02 0.00 907.23
06/16/22 912.25 6.26 0.00 905.99
MW-5
Page 4 of 23
TABLE 2
HISTORICAL GROUNDWATER ELEVATION DATA
FORMER CONOCOPHILLIPS TERMINAL NO. 33441 (RM 6578)
115 SOUTH CHIMNEY ROCK ROAD
GREENSBORO, NORTH CAROLINA
INCIDENT NO. 7706
Well ID Date Measured Top of Casing
Elevation (ft)
Depth to
Groundwater
(ft)
LNAPL
Thickness (ft)
Groundwater
Elevation (ft)
04/28/09 921.74 12.54 0.00 909.20
06/30/09 921.74 12.55 0.00 909.19
08/31/09 921.74 15.31 0.00 906.43
06/30/11 921.74 13.80 0.00 907.94
12/20/11 921.74 13.04 0.00 908.70
03/29/12 921.74 13.09 0.00 908.65
12/03/12 921.74 15.62 0.00 906.12
06/28/13 921.74 12.11 0.00 909.63
12/30/13 921.74 14.28 0.00 907.46
06/27/14 921.74 15.06 0.00 906.68
12/30/14 921.74 15.34 0.00 906.40
06/12/15 921.74 14.91 0.00 906.83
12/17/15 921.74 11.82 0.00 909.92
06/21/16 921.74 12.69 0.00 909.05
12/20/16 921.74 15.54 0.00 906.20
06/13/17 921.74 12.62 0.00 909.12
12/05/17 921.74 16.37 0.00 905.37
06/07/18 921.74 13.16 0.00 908.58
09/11/18 921.74 13.44 0.00 908.30
12/18/18 921.74 10.30 0.00 911.44
03/13/19 921.74 11.12 0.00 910.62
06/12/19 921.74 12.17 0.00 909.57
09/11/19 921.74 13.27 0.00 908.47
12/20/19 921.74 11.50 0.00 910.24
03/04/20 921.74 11.58 0.00 910.16
06/03/20 921.74 11.05 0.00 910.69
09/14/20 921.74 13.37 0.00 908.37
12/09/20 921.74 11.60 0.00 910.14
03/30/21 921.74 10.27 0.00 911.47
06/24/21 921.74 13.29 0.00 908.45
09/23/21 921.74 13.27 0.00 908.47
12/14/21 921.74 14.89 0.00 906.85
03/29/22 921.74 12.33 0.00 909.41
06/16/22 921.74 14.14 0.00 907.60
MW-6
Page 5 of 23
TABLE 2
HISTORICAL GROUNDWATER ELEVATION DATA
FORMER CONOCOPHILLIPS TERMINAL NO. 33441 (RM 6578)
115 SOUTH CHIMNEY ROCK ROAD
GREENSBORO, NORTH CAROLINA
INCIDENT NO. 7706
Well ID Date Measured Top of Casing
Elevation (ft)
Depth to
Groundwater
(ft)
LNAPL
Thickness (ft)
Groundwater
Elevation (ft)
04/28/09 924.77 11.03 0.00 913.74
06/30/09 924.77 10.76 0.00 914.01
08/31/09 924.77 15.08 0.00 909.69
06/30/11 924.77 12.71 0.00 912.06
12/20/11 924.77 11.44 0.00 913.33
03/29/12 924.77 11.95 0.00 912.82
06/28/12 924.77 14.15 0.00 910.62
12/03/12 924.77 16.13 0.00 908.64
06/28/13 924.77 12.15 0.00 912.62
12/30/13 924.77 14.36 0.00 910.41
06/27/14 924.77 14.10 0.00 910.67
12/30/14 924.77 15.25 0.00 909.52
06/12/15 924.77 13.98 0.00 910.79
12/17/15 924.77 10.47 0.00 914.30
06/21/16 924.77 11.68 0.00 913.09
12/20/16 924.77 16.68 0.00 908.09
06/13/17 924.77 10.78 0.00 913.99
12/05/17 924.77 17.42 0.00 907.35
06/07/18 924.77 11.86 0.00 912.91
09/11/18 924.77 11.83 0.00 912.94
12/18/18 924.77 6.05 0.00 918.72
03/13/19 924.77 8.04 0.00 916.73
06/12/19 924.77 9.52 0.00 915.25
09/11/19 924.77 12.22 0.00 912.55
12/20/19 924.77 9.13 0.00 915.64
03/04/20 924.77
06/03/20 924.77 7.52 0.00 917.25
09/14/20 924.77 12.44 0.00 912.33
12/09/20 924.77 9.63 0.00 915.14
03/30/21 924.77 6.87 0.00 917.90
06/24/21 924.77 12.56 0.00 912.21
09/23/21 924.77 12.81 0.00 911.96
12/14/21 924.77 15.95 0.00 908.82
03/29/22 924.77 11.50 0.00 913.27
06/16/22 924.77 13.69 0.00 911.08
Not Measured
MW-7
Page 6 of 23
TABLE 2
HISTORICAL GROUNDWATER ELEVATION DATA
FORMER CONOCOPHILLIPS TERMINAL NO. 33441 (RM 6578)
115 SOUTH CHIMNEY ROCK ROAD
GREENSBORO, NORTH CAROLINA
INCIDENT NO. 7706
Well ID Date Measured Top of Casing
Elevation (ft)
Depth to
Groundwater
(ft)
LNAPL
Thickness (ft)
Groundwater
Elevation (ft)
04/28/09 926.09 12.20 0.00 913.89
06/30/09 926.09 12.07 0.00 914.02
08/31/09 926.09 16.13 0.00 909.96
06/30/11 926.09 13.62 0.00 912.47
12/20/11 926.09 12.31 0.00 913.78
03/29/12 926.09 12.65 0.00 913.44
06/28/12 926.09 14.79 0.00 911.30
12/03/12 926.09 16.27 0.00 909.82
06/28/13 926.09 13.07 0.00 913.02
12/30/13 926.09 15.29 0.00 910.80
06/27/14 926.09 14.76 0.00 911.33
12/30/14 926.09 15.53 0.00 910.56
06/12/15 926.09 14.46 0.00 911.63
12/17/15 926.09 11.73 0.00 914.36
06/21/16 926.09 12.88 0.00 913.21
12/20/16 926.09 16.81 0.00 909.28
06/13/17 926.09 12.30 0.00 913.79
12/05/17 926.09 17.85 0.00 908.24
06/07/18 926.09 13.00 0.00 913.09
09/11/18 926.09 13.10 0.00 912.99
12/18/18 926.09 8.97 0.00 917.12
03/13/19 926.09 9.68 0.00 916.41
06/12/19 926.09 11.33 0.00 914.76
09/11/19 926.09 13.48 0.00 912.61
12/20/19 926.09 10.69 0.00 915.40
03/04/20 926.09 10.11 0.00 915.98
06/03/20 926.09 9.33 0.00 916.76
09/14/20 926.09 13.31 0.00 912.78
12/09/20 926.09 10.78 0.00 915.31
03/30/21 926.09 8.68 0.00 917.41
06/24/21 926.09 13.62 0.00 912.47
09/23/21 926.09 13.66 0.00 912.43
12/14/21 926.09 16.13 0.00 909.96
03/29/22 926.09 11.67 0.00 914.42
06/16/22 926.09 14.77 0.00 911.32
MW-8
Page 7 of 23
TABLE 2
HISTORICAL GROUNDWATER ELEVATION DATA
FORMER CONOCOPHILLIPS TERMINAL NO. 33441 (RM 6578)
115 SOUTH CHIMNEY ROCK ROAD
GREENSBORO, NORTH CAROLINA
INCIDENT NO. 7706
Well ID Date Measured Top of Casing
Elevation (ft)
Depth to
Groundwater
(ft)
LNAPL
Thickness (ft)
Groundwater
Elevation (ft)
04/28/09 924.93 11.05 0.00 913.88
06/30/09 924.93 10.81 0.00 914.12
08/31/09 924.93 14.79 0.00 910.14
06/30/11 924.93 12.81 0.00 912.12
12/20/11 924.93 11.47 0.00 913.46
03/29/12 924.93 11.85 0.00 913.08
06/28/12 924.93 13.94 0.00 910.99
12/03/12 924.93 15.95 0.00 908.98
06/28/13 924.93 12.72 0.00 912.21
12/30/13 924.93 14.92 0.00 910.01
06/27/14 924.93 13.91 0.00 911.02
12/30/14 924.93 15.44 0.00 909.49
06/12/15 924.93 13.87 0.00 911.06
12/17/15 924.93 10.46 0.00 914.47
03/09/16 924.93 10.07 0.00 914.86
06/21/16 924.93 11.80 0.00 913.13
12/20/16 924.93 15.02 0.00 909.91
03/21/17 924.93 14.50 0.00 910.43
06/13/17 924.93 10.85 0.00 914.08
12/05/17 924.93 17.02 0.00 907.91
06/07/18 924.93 11.70 0.00 913.23
09/11/18 924.93 11.50 0.00 913.43
12/18/18 924.93 6.84 0.00 918.09
03/13/19 924.93 8.68 0.00 916.25
06/12/19 924.93 9.66 0.00 915.27
09/11/19 924.93 12.34 0.00 912.59
12/20/19 924.93 9.40 0.00 915.53
03/04/20 924.93 9.21 0.00 915.72
06/03/20 924.93 8.17 0.00 916.76
09/14/20 924.93 12.33 0.00 912.60
12/09/20 924.93 9.93 0.00 915.00
03/30/21 924.93 7.52 0.00 917.41
06/24/21 924.93
09/23/21 924.93
12/14/21 924.93
03/29/22 924.93 10.58 0.00 914.35
06/16/22 924.93 13.59 0.00 911.34
Not Measured
Not Measured
Not Measured
MW-9
Page 8 of 23
TABLE 2
HISTORICAL GROUNDWATER ELEVATION DATA
FORMER CONOCOPHILLIPS TERMINAL NO. 33441 (RM 6578)
115 SOUTH CHIMNEY ROCK ROAD
GREENSBORO, NORTH CAROLINA
INCIDENT NO. 7706
Well ID Date Measured Top of Casing
Elevation (ft)
Depth to
Groundwater
(ft)
LNAPL
Thickness (ft)
Groundwater
Elevation (ft)
04/28/09 923.42 11.48 0.00 911.94
06/30/09 923.42 11.41 0.00 912.01
08/31/09 923.42 12.78 0.00 910.64
12/20/11 923.42 11.71 0.00 911.71
03/29/12 923.42 11.62 0.00 911.80
06/28/12 923.42 13.06 0.00 910.36
12/03/12 923.42 14.75 0.00 908.67
06/28/13 923.42 10.96 0.00 912.46
12/30/13 923.42 13.50 0.00 909.92
06/27/14 923.42 13.01 0.00 910.41
12/30/14 923.42 14.13 0.00 909.29
06/12/15 923.42 12.81 0.00 910.61
12/17/15 923.42 11.07 0.00 912.35
06/21/16 923.42 11.32 0.00 912.10
12/20/16 923.42 NM NM NM
06/13/17 923.42 11.20 0.00 912.22
12/05/17 923.42 NM NM NM
06/07/18 923.42 11.63 NM 911.79
09/11/18 923.42 11.50 NM 911.92
12/18/18 923.42 9.14 NM 914.28
03/13/19 923.42 8.68 0.00 914.74
06/12/19 923.42 10.00 0.00 913.42
09/11/19 923.42 11.89 0.00 911.53
12/20/19 923.42 10.52 0.00 912.90
03/04/20 923.42 9.90 0.00 913.52
06/03/20 923.42 9.18 0.00 914.24
09/14/20 923.42 11.79 0.00 911.63
12/09/20 923.42 10.10 0.00 913.32
03/30/21 923.42 9.14 0.00 914.28
06/24/21 923.42 11.44 0.00 911.98
09/23/21 923.42 11.27 0.00 912.15
12/14/21 923.42 14.60 0.00 908.82
03/29/22 923.42 10.90 0.00 912.52
06/16/22 923.42 12.66 0.00 910.76
MW-10
Page 9 of 23
TABLE 2
HISTORICAL GROUNDWATER ELEVATION DATA
FORMER CONOCOPHILLIPS TERMINAL NO. 33441 (RM 6578)
115 SOUTH CHIMNEY ROCK ROAD
GREENSBORO, NORTH CAROLINA
INCIDENT NO. 7706
Well ID Date Measured Top of Casing
Elevation (ft)
Depth to
Groundwater
(ft)
LNAPL
Thickness (ft)
Groundwater
Elevation (ft)
04/28/09 922.60 11.83 0.00 910.77
06/30/09 922.60 12.00 0.00 910.60
08/31/09 922.60 13.27 0.00 909.33
03/25/10 922.60 10.14 0.00 912.46
06/23/10 922.60 10.51 0.00 912.09
09/29/10 922.60 12.63 0.00 909.97
12/28/10 922.60 12.97 0.00 909.63
06/30/11 922.60 12.79 0.00 909.81
09/29/11 922.60 14.44 0.00 908.16
12/20/11 922.60 12.99 0.00 909.61
03/29/12 922.60 12.82 0.00 909.78
06/28/12 922.60 13.95 0.00 908.65
09/26/12 922.60 13.74 0.00 908.86
12/03/12 922.60 15.39 0.00 907.21
03/28/13 922.60 12.62 0.00 909.98
06/28/13 922.60 11.23 0.00 911.37
09/04/13 922.60 11.81 0.00 910.79
12/30/13 922.60 13.71 0.00 908.89
03/31/14 922.60 12.68 0.00 909.92
06/27/14 922.60 13.90 0.00 908.70
09/16/14 922.60 13.84 0.00 908.76
12/30/14 922.60 14.92 0.00 907.68
03/31/15 922.60 12.00 0.00 910.60
06/12/15 922.60 13.01 0.00 909.59
09/17/15 922.60 15.75 0.00 906.85
12/17/15 922.60 12.12 0.00 910.48
03/09/16 922.60 11.93 0.00 910.67
06/21/16 922.60 12.15 0.00 910.45
09/29/16 922.60 13.71 0.00 908.89
12/20/16 922.60 15.34 0.00 907.26
03/21/17 922.60 14.05 0.00 908.55
06/13/17 922.60 12.25 0.00 910.35
09/20/17 922.60 14.54 0.00 908.06
12/05/17 922.60 15.99 0.00 906.61
03/27/18 922.60 11.84 0.00 910.76
06/07/18 922.60 12.74 0.00 909.86
09/11/18 922.60 12.78 0.00 909.82
12/18/18 922.60 10.78 0.00 911.82
03/13/19 922.60 11.47 0.00 911.13
06/12/19 922.60 11.83 0.00 910.77
09/11/19 922.60 12.59 0.00 910.01
12/20/19 922.60 12.04 0.00 910.56
03/04/20 922.60 11.65 0.00 910.95
06/03/20 922.60 11.21 0.00 911.39
09/14/20 922.60 12.81 0.00 909.79
12/09/20 922.60 11.65 0.00 910.95
03/30/21 922.60 11.17 0.00 911.43
06/24/21 922.60 12.56 0.00 910.04
09/23/21 922.60 12.38 0.00 910.22
12/14/21 922.60 14.50 0.00 908.10
03/29/22 922.60 12.18 0.00 910.42
06/16/22 922.60 13.44 0.00 909.16
MW-11
Page 10 of 23
TABLE 2
HISTORICAL GROUNDWATER ELEVATION DATA
FORMER CONOCOPHILLIPS TERMINAL NO. 33441 (RM 6578)
115 SOUTH CHIMNEY ROCK ROAD
GREENSBORO, NORTH CAROLINA
INCIDENT NO. 7706
Well ID Date Measured Top of Casing
Elevation (ft)
Depth to
Groundwater
(ft)
LNAPL
Thickness (ft)
Groundwater
Elevation (ft)
04/28/09 923.90 10.40 0.00 913.50
06/30/09 923.90 10.71 0.00 913.19
08/31/09 923.90 14.10 0.00 909.80
11/30/09 923.90 10.45 0.00 913.45
03/25/10 923.90 9.77 0.00 914.13
06/23/10 923.90 11.43 0.00 912.47
09/29/10 923.90 13.81 0.00 910.09
12/28/10 923.90 13.16 0.00 910.74
06/30/11 923.90 12.21 0.00 911.69
09/29/11 923.90 13.26 0.00 910.64
12/20/11 923.90 11.20 0.00 912.70
03/29/12 923.90 8.87 0.00 915.03
06/28/12 923.90 13.06 0.00 910.84
09/26/12 923.90 11.65 0.00 912.25
12/03/12 923.90 13.68 0.00 910.22
03/28/13 923.90 10.81 0.00 913.09
06/28/13 923.90 9.70 0.00 914.20
09/04/13 923.90 9.53 0.00 914.37
12/30/13 923.90 11.81 0.00 912.09
03/31/14 923.90 10.73 0.00 913.17
06/27/14 923.90 13.00 0.00 910.90
09/16/14 923.90 11.76 0.00 912.14
12/30/14 923.90 13.44 0.00 910.46
03/31/15 923.90 10.50 0.00 913.40
06/12/15 923.90 12.82 0.00 911.08
09/17/15 923.90 15.37 0.00 908.53
12/17/15 923.90 12.09 0.00 911.81
03/09/16 923.90 9.77 0.00 914.13
06/21/16 923.90 11.85 0.00 912.05
09/29/16 923.90 14.36 0.00 909.54
12/20/16 923.90 15.15 0.00 908.75
03/21/17 923.90 14.00 0.00 909.90
06/13/17 923.90 11.39 0.00 912.51
09/20/17 923.90 14.71 0.00 909.19
12/05/17 923.90 15.58 0.00 908.32
03/27/18 923.90 14.61 0.00 909.29
06/07/18 923.90 12.70 0.00 911.20
09/11/18 923.90 11.81 0.00 912.09
12/18/18 923.90 8.89 0.00 915.01
03/13/19 923.90 9.06 0.00 914.84
06/12/19 923.90 10.14 0.00 913.76
09/11/19 923.90 11.61 0.00 912.29
12/20/19 923.90 10.48 0.00 913.42
03/04/20 923.90 9.16 0.00 914.74
06/03/20 923.90 8.91 0.00 914.99
09/14/20 923.90 12.00 0.00 911.90
12/09/20 923.90 9.72 0.00 914.18
03/30/21 923.90 8.88 0.00 915.02
06/24/21 923.90 11.48 0.00 912.42
09/23/21 923.90 13.91 0.00 909.99
12/14/21 923.90 14.94 0.00 908.96
03/29/22 923.90 10.18 0.00 913.72
06/16/22 923.90 15.38 0.00 908.52
MW-12
Page 11 of 23
TABLE 2
HISTORICAL GROUNDWATER ELEVATION DATA
FORMER CONOCOPHILLIPS TERMINAL NO. 33441 (RM 6578)
115 SOUTH CHIMNEY ROCK ROAD
GREENSBORO, NORTH CAROLINA
INCIDENT NO. 7706
Well ID Date Measured Top of Casing
Elevation (ft)
Depth to
Groundwater
(ft)
LNAPL
Thickness (ft)
Groundwater
Elevation (ft)
04/28/09 925.63 10.91 0.00 914.72
06/30/09 925.63 10.99 0.00 914.64
08/31/09 925.63 14.83 0.00 910.80
03/25/10 925.63 10.08 0.00 915.55
06/24/10 925.63 11.61 0.00 914.02
09/29/10 925.63 14.02 0.00 911.61
12/28/10 925.63 13.89 0.00 911.74
06/30/11 925.63 12.53 0.00 913.10
09/29/11 925.63 13.96 0.00 911.67
12/20/11 925.63 11.33 0.00 914.30
03/29/12 925.63 11.20 0.00 914.43
06/28/12 925.63 13.55 0.00 912.08
09/26/12 925.63 12.94 0.00 912.69
12/03/12 925.63 15.12 0.00 910.51
03/28/13 925.63 10.96 0.00 914.67
06/28/13 925.63 11.27 0.00 914.36
09/04/13 925.63 11.53 0.00 914.10
12/30/13 925.63 13.59 0.00 912.04
03/31/14 925.63 10.52 0.00 915.11
06/27/14 925.63 13.50 0.00 912.13
09/16/14 925.63 13.05 0.00 912.58
12/30/14 925.63 14.36 0.00 911.27
03/31/15 925.63 10.75 0.00 914.88
06/12/15 925.63 12.97 0.00 912.66
09/17/15 925.63 16.28 0.00 909.35
12/17/15 925.63 10.90 0.00 914.73
03/09/16 925.63 9.71 0.00 915.92
06/21/16 925.63 11.67 0.00 913.96
09/29/16 925.63 14.20 0.00 911.43
12/20/16 925.63 15.49 0.00 910.14
03/21/17 925.63 13.83 0.00 911.80
06/13/17 925.63 11.04 0.00 914.59
09/20/17 925.63 14.62 0.00 911.01
12/05/17 925.63 16.45 0.00 909.18
03/27/18 925.63 10.70 0.00 914.93
06/07/18 925.63 11.73 0.00 913.90
09/11/18 925.63 11.76 0.00 913.87
12/18/18 925.63 8.66 0.00 916.97
03/13/19 925.63 8.34 0.00 917.29
06/12/19 925.63 9.42 0.00 916.21
09/11/19 925.63 12.21 0.00 913.42
12/20/19 925.63 9.71 0.00 915.92
03/04/20 925.63 9.09 0.00 916.54
06/03/20 925.63 7.88 0.00 917.75
09/14/20 925.63 12.22 0.00 913.41
12/09/20 925.63 9.72 0.00 915.91
03/30/21 925.63 7.52 0.00 918.11
06/24/21 925.63 12.23 0.00 913.40
09/23/21 925.63 12.63 0.00 913.00
12/14/21 925.63 14.94 0.00 910.69
03/29/22 925.63 10.45 0.00 915.18
06/16/22 925.63 13.34 0.00 912.29
MW-13
Page 12 of 23
TABLE 2
HISTORICAL GROUNDWATER ELEVATION DATA
FORMER CONOCOPHILLIPS TERMINAL NO. 33441 (RM 6578)
115 SOUTH CHIMNEY ROCK ROAD
GREENSBORO, NORTH CAROLINA
INCIDENT NO. 7706
Well ID Date Measured Top of Casing
Elevation (ft)
Depth to
Groundwater
(ft)
LNAPL
Thickness (ft)
Groundwater
Elevation (ft)
04/28/09 925.48 11.36 0.00 914.12
06/30/09 925.48 11.10 0.00 914.38
08/31/09 925.48 17.28 0.00 908.20
04/28/09 924.63 12.71 0.00 911.92
06/30/09 924.63 12.65 0.00 911.98
08/31/09 924.63 16.29 0.00 908.34
MW-16 06/28/04 919.02
04/28/09 925.27 10.38 0.00 914.89
06/30/09 925.27 10.39 0.00 914.88
08/31/09 925.27 14.25 0.00 911.02
12/20/11 925.27 10.72 0.00 914.55
03/29/12 925.27 10.66 0.00 914.61
06/28/12 925.27 12.97 0.00 912.30
12/03/12 925.27 14.42 0.00 910.85
06/28/13 925.27 10.62 0.00 914.65
12/30/13 925.27 12.81 0.00 912.46
06/27/14 925.27 12.95 0.00 912.32
12/30/14 925.27 13.70 0.00 911.57
06/12/15 925.27 12.91 0.00 912.36
12/17/15 925.27 10.18 0.00 915.09
06/21/16 925.27 11.00 0.00 914.27
12/20/16 925.27 15.04 0.00 910.23
06/13/17 925.27 10.53 0.00 914.74
12/05/17 925.27 15.95 0.00 909.32
09/11/18 925.27 11.34 0.00 913.93
12/18/18 925.27 7.37 0.00 917.90
03/13/19 925.27 7.69 0.00 917.58
06/12/19 925.27 9.50 0.00 915.77
09/11/19 925.27 11.55 0.00 913.72
12/20/19 925.27 9.04 0.00 916.23
03/04/20 925.27 10.18 0.00 915.09
06/03/20 925.27 8.24 0.00 917.03
09/14/20 925.27 11.34 0.00 913.93
12/09/20 925.27 8.88 0.00 916.39
03/30/21 925.27 6.85 0.00 918.42
06/24/21 925.27 11.60 0.00 913.67
09/23/21 925.27 12.24 0.00 913.03
12/14/21 925.27 14.26 0.00 911.01
03/29/22 925.27 9.79 0.00 915.48
06/16/22 925.27 12.85 0.00 912.42
04/28/09 925.65 12.23 0.00 913.42
11/30/09 925.65
04/28/09 919.93 12.30 0.00 907.63
11/30/09 919.93
DW-2
DW-3
Abandoned
Sparge Well - No Longer Measured
Sparge Well - No Longer Measured
DW-1
MW-14
MW-15
Page 13 of 23
TABLE 2
HISTORICAL GROUNDWATER ELEVATION DATA
FORMER CONOCOPHILLIPS TERMINAL NO. 33441 (RM 6578)
115 SOUTH CHIMNEY ROCK ROAD
GREENSBORO, NORTH CAROLINA
INCIDENT NO. 7706
Well ID Date Measured Top of Casing
Elevation (ft)
Depth to
Groundwater
(ft)
LNAPL
Thickness (ft)
Groundwater
Elevation (ft)
04/28/09 923.10 2.04 0.00 921.06
06/30/09 923.10 6.83 0.00 916.27
08/31/09 923.10 9.86 0.00 913.24
DPE-2 06/28/04 921.55
DPE-3 06/28/04 921.15
DPE-4 06/28/04 920.41
DPE-5 06/28/04 920.77
04/28/09 921.03 7.88 0.00 913.15
06/30/09 921.03 7.65 0.00 913.38
08/31/09 921.03 11.59 0.00 909.44
12/20/11 921.03 8.22 0.00 912.81
03/29/12 921.03 8.58 0.00 912.45
06/28/12 921.03 10.70 0.00 910.33
12/03/12 921.03 12.69 0.00 908.34
06/28/13 921.03 8.94 0.00 912.09
12/30/13 921.03 11.08 0.00 909.95
06/27/14 921.03 10.66 0.00 910.37
12/30/14 921.03 11.89 0.00 909.14
06/12/15 921.03 10.57 0.00 910.46
12/17/15 921.03
06/21/16 921.03 6.60 0.00 914.43
12/20/16 921.03
06/13/17 921.03
12/05/17 921.03
09/11/18 921.03
12/18/18 921.03
03/13/19 921.03
06/12/19 921.03
03/04/20 921.03
06/03/20 921.03
03/30/21 921.03
06/24/21 921.03 7.40 0.00 913.63
09/23/21 921.03 7.46 0.00 913.57
12/14/21 921.03 10.60 0.00 910.43
03/29/22 921.03 5.49 0.00 915.54
06/16/22 921.03 8.46 0.00 912.57
DPE-1
Unable to Locate
Unable to Locate
Well under water
Unable to Locate
Sparge well - no longer measured
Sparge well - no longer measured
Sparge well - no longer measured
Sparge well - no longer measured
DPE-6
Unable to Locate
Unable to Locate
Unable to Locate
Unable to Locate
Unable to Locate
Unable to Locate
Unable to Locate
Page 14 of 23
TABLE 2
HISTORICAL GROUNDWATER ELEVATION DATA
FORMER CONOCOPHILLIPS TERMINAL NO. 33441 (RM 6578)
115 SOUTH CHIMNEY ROCK ROAD
GREENSBORO, NORTH CAROLINA
INCIDENT NO. 7706
Well ID Date Measured Top of Casing
Elevation (ft)
Depth to
Groundwater
(ft)
LNAPL
Thickness (ft)
Groundwater
Elevation (ft)
04/28/09 920.98 8.17 0.00 912.81
06/30/09 920.98 7.90 0.00 913.08
08/31/09 920.98 11.62 0.00 909.36
12/20/11 920.98 8.52 0.00 912.46
03/29/12 920.98 8.90 0.00 912.08
06/28/12 920.98 11.02 0.00 909.96
12/03/12 920.98 13.08 0.00 907.90
06/28/13 920.98 8.95 0.00 912.03
12/30/13 920.98 11.11 0.00 909.87
06/27/14 920.98 10.97 0.00 910.01
12/30/14 920.98 12.10 0.00 908.88
06/12/15 920.98 10.84 0.00 910.14
12/17/15 920.98 7.43 0.00 913.55
06/21/16 920.98 8.60 0.00 912.38
12/20/16 920.98 13.53 0.00 907.45
06/13/17 920.98 7.80 0.00 913.18
12/05/17 920.98 14.29 0.00 906.69
12/18/18 920.98 3.31 0.00 917.67
03/13/19 920.98 5.03 0.00 915.95
06/12/19 920.98 6.30 0.00 914.68
09/11/19 920.98 9.07 0.00 911.91
12/20/19 920.98
03/04/20 920.98 5.98 0.00 915.00
06/03/20 920.98 4.53 0.00 916.45
09/14/20 920.98 9.35 0.00 911.63
12/09/20 920.98 6.67 0.00 914.31
03/30/21 920.98 4.02 0.00 916.96
06/24/21 920.98 9.32 0.00 911.66
09/23/21 920.98 9.22 0.00 911.76
12/14/21 920.98 12.82 0.00 908.16
03/29/22 920.98 7.53 0.00 913.45
06/16/22 920.98 10.49 0.00 910.49
04/28/09 920.93 7.50 0.00 913.43
06/30/09 920.93 7.32 0.00 913.61
12/20/11 920.93 7.75 0.00 913.18
03/29/12 920.93 7.97 0.00 912.96
06/28/12 920.93 10.02 0.00 910.91
12/03/12 920.93 11.92 0.00 909.01
06/28/13 920.93 7.98 0.00 912.95
12/30/13 920.93 10.15 0.00 910.78
06/27/14 920.93 9.97 0.00 910.96
12/30/14 920.93 11.04 0.00 909.89
06/12/15 920.93 9.96 0.00 910.97
12/17/15 920.93
DPE-8
Well under water
DPE-7
Unable to Locate
Page 15 of 23
TABLE 2
HISTORICAL GROUNDWATER ELEVATION DATA
FORMER CONOCOPHILLIPS TERMINAL NO. 33441 (RM 6578)
115 SOUTH CHIMNEY ROCK ROAD
GREENSBORO, NORTH CAROLINA
INCIDENT NO. 7706
Well ID Date Measured Top of Casing
Elevation (ft)
Depth to
Groundwater
(ft)
LNAPL
Thickness (ft)
Groundwater
Elevation (ft)
04/28/09 920.81 7.43 0.00 913.38
06/30/09 920.81 7.13 0.00 913.68
08/31/09 920.81 10.10 0.00 910.71
12/20/11 920.81 7.47 0.00 913.34
03/29/12 920.81 7.69 0.00 913.12
06/28/12 920.81 9.67 0.00 911.14
12/03/12 920.81 11.55 0.00 909.26
06/28/13 920.81 7.62 0.00 913.19
12/30/13 920.81 9.81 0.00 911.00
06/27/14 920.81 9.61 0.00 911.20
12/30/14 920.81 10.68 0.00 910.13
06/12/15 920.81 9.54 0.00 911.27
12/17/15 920.81 4.58 0.00 916.23
06/21/16 920.81 7.70 0.00 913.11
12/20/16
06/13/17 920.81 8.08 0.00 912.73
05/25/06 920.33 10.25 0.00 910.08
11/28/06 920.33 6.03 0.00 914.30
10/16/07 920.33 13.86 0.00 906.47
12/05/17
12/18/18
03/13/19
06/12/19
03/04/20
06/03/20
03/30/21
06/24/21
09/23/21
12/14/21
03/29/22 920.33 6.89 0.00 913.44
06/16/22
Well Not Located
Well Not Located
Well Not Located
Well Not Located
Well Not Located
Well Not Located
Well Not Located
Well Not Located
Well Not Located
Well Not Located
Well Not Located
DPE-9
Well Not Located
Page 16 of 23
TABLE 2
HISTORICAL GROUNDWATER ELEVATION DATA
FORMER CONOCOPHILLIPS TERMINAL NO. 33441 (RM 6578)
115 SOUTH CHIMNEY ROCK ROAD
GREENSBORO, NORTH CAROLINA
INCIDENT NO. 7706
Well ID Date Measured Top of Casing
Elevation (ft)
Depth to
Groundwater
(ft)
LNAPL
Thickness (ft)
Groundwater
Elevation (ft)
04/28/09 920.33 7.48 0.00 912.85
06/30/09 920.33 7.24 0.00 913.09
08/31/09 920.33 9.89 0.00 910.44
12/20/11 920.33 7.65 0.00 912.68
03/29/12 920.33 7.80 0.00 912.53
06/28/12 920.33 9.81 0.00 910.52
12/03/12 920.33 11.78 0.00 908.55
06/28/13 920.33 8.19 0.00 912.14
12/30/13 920.33 10.36 0.00 909.97
06/27/14 920.33 9.75 0.00 910.58
12/30/14 920.33 11.07 0.00 909.26
06/12/15 920.33 9.68 0.00 910.65
12/17/15 920.33 6.85 0.00 913.48
06/21/16 920.33 7.72 0.00 912.61
12/20/16 920.33 12.26 0.00 908.07
06/13/17 920.33 7.08 0.00 913.25
12/05/17 920.33 13.01 0.00 907.32
03/13/19 920.33 4.50 0.00 915.83
06/12/19 920.33 5.32 0.00 915.01
09/11/19 920.33 8.18 0.00 912.15
12/20/19 920.33 5.80 0.00 914.53
03/04/20 920.33 5.23 0.00 915.10
06/03/20 920.33 3.98 0.00 916.35
09/14/20 920.33 8.48 0.00 911.85
12/09/20 920.33 5.92 0.00 914.41
03/30/21 920.33 3.82 0.00 916.51
06/24/21 920.33 8.16 0.00 912.17
09/23/21 920.33 7.02 0.00 913.31
12/14/21 920.33 11.58 0.00 908.75
03/29/22 920.33 6.70 0.00 913.63
06/16/22 920.33 9.37 0.00 910.96
DPE-10
Page 17 of 23
TABLE 2
HISTORICAL GROUNDWATER ELEVATION DATA
FORMER CONOCOPHILLIPS TERMINAL NO. 33441 (RM 6578)
115 SOUTH CHIMNEY ROCK ROAD
GREENSBORO, NORTH CAROLINA
INCIDENT NO. 7706
Well ID Date Measured Top of Casing
Elevation (ft)
Depth to
Groundwater
(ft)
LNAPL
Thickness (ft)
Groundwater
Elevation (ft)
04/28/09 920.39 8.65 0.00 911.74
06/30/09 920.39 8.53 0.00 911.86
11/30/09 920.39 8.27 0.00 912.12
03/25/10 920.39 7.26 0.00 913.13
06/23/10 920.39 9.76 0.00 910.63
09/29/10 920.39 12.05 0.00 908.34
12/28/10 920.39 12.70 0.00 907.69
06/30/11 920.39 9.55 0.00 910.84
09/29/11 920.39 9.22 0.00 911.17
12/20/11 920.39 9.00 0.00 911.39
03/29/12 920.39 8.32 0.00 912.07
06/28/12 920.39 11.18 0.00 909.21
09/26/12 920.39 10.17 0.00 910.22
12/03/12 920.39 12.55 0.00 907.84
06/28/13 920.39 8.32 0.00 912.07
12/30/13 920.39 10.57 0.00 909.82
06/27/14 920.39 11.17 0.00 909.22
12/30/14 920.39 11.87 0.00 908.52
06/12/15 920.39 11.14 0.00 909.25
12/17/15 920.39 7.75 0.00 912.64
03/09/16 920.39 6.40 0.00 913.99
06/21/16 920.39 7.89 0.00 912.50
12/20/16 920.39 12.44 0.00 907.95
03/21/17 920.39 10.65 0.00 909.74
06/13/17 920.39 6.99 0.00 913.40
12/05/17 920.39 13.22 0.00 907.17
12/18/18 920.39 4.02 0.00 916.37
03/13/19 920.39 5.12 0.00 915.27
06/12/19 920.39 5.79 0.00 914.60
09/11/19 920.39 8.60 0.00 911.79
12/20/19 920.39 6.55 0.00 913.84
03/04/20 920.39 5.68 0.00 914.71
06/03/20 920.39 4.48 0.00 915.91
09/14/20 920.39 8.76 0.00 911.63
12/09/20 920.39 6.42 0.00 913.97
03/30/21 920.39 4.32 0.00 916.07
06/24/21 920.39 8.43 0.00 911.96
09/23/21 920.39 7.89 0.00 912.50
12/14/21 920.39 11.76 0.00 908.63
03/29/22 920.39 7.04 0.00 913.35
06/16/22 920.39 9.71 0.00 910.68
DPE-12 06/28/04 921.33
DPE-13 06/28/04 920.91
Sparge well - no longer measured
Sparge well - no longer measured
DPE-11
Page 18 of 23
TABLE 2
HISTORICAL GROUNDWATER ELEVATION DATA
FORMER CONOCOPHILLIPS TERMINAL NO. 33441 (RM 6578)
115 SOUTH CHIMNEY ROCK ROAD
GREENSBORO, NORTH CAROLINA
INCIDENT NO. 7706
Well ID Date Measured Top of Casing
Elevation (ft)
Depth to
Groundwater
(ft)
LNAPL
Thickness (ft)
Groundwater
Elevation (ft)
04/28/09 919.98 6.27 0.00 913.71
06/30/09 919.98 5.97 0.00 914.01
08/31/09 919.98 9.40 0.00 910.58
11/30/09 919.98 6.58 0.00 913.40
03/25/10 919.98 6.38 0.00 913.60
06/23/10 919.98 6.30 0.00 913.68
09/29/10 919.98 10.40 0.00 909.58
12/28/10 919.98 8.75 0.00 911.23
06/30/11 919.98 8.22 0.00 911.76
09/29/11 919.98 7.84 0.00 912.14
12/20/11 919.98 6.58 0.00 913.40
03/29/12 919.98 4.57 0.00 915.41
06/28/12 919.98 6.70 0.00 913.28
09/26/12 919.98 6.30 0.00 913.68
12/03/12 919.98 8.25 0.00 911.73
06/28/13 919.98 5.01 0.00 914.97
12/30/13 919.98 7.20 0.00 912.78
06/27/14 919.98 6.67 0.00 913.31
12/30/14 919.98 7.73 0.00 912.25
06/12/15 919.98 6.60 0.00 913.38
12/17/15 919.98 6.28 0.00 913.70
03/09/16 919.98 6.22 0.00 913.76
06/21/16 919.98 7.55 0.00 912.43
12/20/16 919.98 9.89 0.00 910.09
03/21/17 919.98 6.98 0.00 913.00
06/13/17 919.98 6.18 0.00 913.80
12/05/17 919.98 6.02 0.00 913.96
09/11/18 919.98 6.38 0.00 913.60
12/18/18 919.98 5.63 0.00 914.35
03/13/19 919.98 6.03 0.00 913.95
06/12/19 919.98 6.15 0.00 913.83
09/11/19 919.98 6.65 0.00 913.33
12/20/19 919.98 6.75 0.00 913.23
03/04/20 919.98 6.38 0.00 913.60
06/03/20 919.98 5.88 0.00 914.10
09/14/20 919.98 7.05 0.00 912.93
12/09/20 919.98 6.39 0.00 913.59
03/30/21 919.98 5.88 0.00 914.10
06/24/21 919.98 6.62 0.00 913.36
09/23/21 919.98 6.21 0.00 913.77
12/14/21 919.98 7.79 0.00 912.19
03/29/22 919.98 6.68 0.00 913.30
06/16/22 919.98 7.69 0.00 912.29
DPE-15 06/28/04 920.41
DPE-17 04/28/09 922.77 8.00 0.00 914.77
Sparge well - no longer measured
DPE-14
Page 19 of 23
TABLE 2
HISTORICAL GROUNDWATER ELEVATION DATA
FORMER CONOCOPHILLIPS TERMINAL NO. 33441 (RM 6578)
115 SOUTH CHIMNEY ROCK ROAD
GREENSBORO, NORTH CAROLINA
INCIDENT NO. 7706
Well ID Date Measured Top of Casing
Elevation (ft)
Depth to
Groundwater
(ft)
LNAPL
Thickness (ft)
Groundwater
Elevation (ft)
04/28/09 923.71 9.70 0.00 914.01
06/30/09 923.71 9.59 0.00 914.12
08/31/09 923.71 12.91 0.00 910.80
12/20/11 923.71 10.10 0.00 913.61
03/29/12 923.71 10.25 0.00 913.46
06/28/12 923.71 12.32 0.00 911.39
12/03/12 923.71 13.15 0.00 910.56
06/28/13 923.71 9.06 0.00 914.65
12/30/13 923.71 11.22 0.00 912.49
06/27/14 923.71 12.29 0.00 911.42
12/30/14 923.71 12.74 0.00 910.97
06/12/15 923.71 12.17 0.00 911.54
12/17/15 923.71
06/21/16 923.71 8.80 0.00 914.91
12/20/16 923.71 12.83 0.00 910.88
06/13/17 923.71 8.57 0.00 915.14
12/05/17 923.71 13.75 0.00 909.96
11/28/06 924.13 8.66 0.00 915.47
05/18/07 924.13 11.19 0.00 912.94
10/16/07 924.13 16.33 0.00 907.80
12/20/16 923.71 12.83 0.00 910.88
09/11/18 923.71 8.70 0.00 915.01
12/18/18 923.71 4.63 0.00 919.08
03/13/19 923.71 5.52 0.00 918.19
06/12/19 923.71 6.60 0.00 917.11
09/11/19 923.71 9.43 0.00 914.28
12/20/19 923.71 6.60 0.00 917.11
03/04/20 923.71 6.23 0.00 917.48
06/03/20 923.71 5.00 0.00 918.71
09/14/20 923.71 9.46 0.00 914.25
12/09/20 923.71 6.91 0.00 916.80
03/30/21 923.71 4.54 0.00 919.17
06/24/21 923.71 9.53 0.00 914.18
09/23/21 923.71 9.38 0.00 914.33
12/14/21 923.71 12.19 0.00 911.52
03/29/22 923.71 7.67 0.00 916.04
06/16/22 923.71 10.52 0.00 913.19
Well under water
DPE-18
Page 20 of 23
TABLE 2
HISTORICAL GROUNDWATER ELEVATION DATA
FORMER CONOCOPHILLIPS TERMINAL NO. 33441 (RM 6578)
115 SOUTH CHIMNEY ROCK ROAD
GREENSBORO, NORTH CAROLINA
INCIDENT NO. 7706
Well ID Date Measured Top of Casing
Elevation (ft)
Depth to
Groundwater
(ft)
LNAPL
Thickness (ft)
Groundwater
Elevation (ft)
04/28/09 924.13 7.25 0.00 916.88
06/30/09 924.13 9.53 0.00 914.60
08/31/09 924.13 13.27 0.00 910.86
12/20/11 924.13 9.92 0.00 914.21
03/29/12 924.13 9.95 0.00 914.18
06/28/12 924.13 12.11 0.00 912.02
12/03/12 924.13 13.84 0.00 910.29
06/28/13 924.13 10.06 0.00 914.07
12/30/13 924.13 12.27 0.00 911.86
06/27/14 924.13 12.10 0.00 912.03
12/30/14 924.13 13.06 0.00 911.07
06/12/15 924.13 11.99 0.00 912.14
12/17/15 924.13
06/21/16 924.13 9.59 0.00 914.54
12/20/16 924.13 13.50 0.00 910.63
06/13/17 924.13
12/05/17 924.13
09/11/18 924.13 9.07 0.00 915.06
12/18/18 924.13 4.80 0.00 919.33
03/13/19 924.13 5.74 0.00 918.39
06/12/19 924.13 6.95 0.00 917.18
09/11/19 924.13 9.00 0.00 915.13
12/20/19 924.13 6.92 0.00 917.21
03/04/20 924.13 6.44 0.00 917.69
06/03/20 924.13 5.23 0.00 918.90
09/14/20 924.13 9.65 0.00 914.48
12/09/20 924.13 7.15 0.00 916.98
03/30/21 924.13 4.82 0.00 919.31
06/24/21 924.13 9.68 0.00 914.45
09/23/21 924.13 9.99 0.00 914.14
12/14/21 924.13 12.37 0.00 911.76
03/29/22 924.13 7.86 0.00 916.27
06/16/22 924.13 10.71 0.00 913.42
Equipment obstruction of well
Unable to Locate
Unable to Locate
DPE-19
Page 21 of 23
TABLE 2
HISTORICAL GROUNDWATER ELEVATION DATA
FORMER CONOCOPHILLIPS TERMINAL NO. 33441 (RM 6578)
115 SOUTH CHIMNEY ROCK ROAD
GREENSBORO, NORTH CAROLINA
INCIDENT NO. 7706
Well ID Date Measured Top of Casing
Elevation (ft)
Depth to
Groundwater
(ft)
LNAPL
Thickness (ft)
Groundwater
Elevation (ft)
04/28/09 924.07 9.35 0.00 914.72
06/30/09 924.07 9.49 0.00 914.58
08/31/09 924.07 13.16 0.00 910.91
11/30/09 924.07 9.20 0.00 914.87
03/25/10 924.07 8.57 0.00 915.50
06/23/10 924.07 10.80 0.00 913.27
09/29/10 924.07 12.70 0.00 911.37
12/28/10 924.07 13.25 0.00 910.82
06/30/11 924.07 10.97 0.00 913.10
09/29/11 924.07 10.34 0.00 913.73
12/20/11 924.07 9.75 0.00 914.32
03/29/12 924.07 9.61 0.00 914.46
06/28/12 924.07 12.07 0.00 912.00
09/26/12 924.07 11.52 0.00 912.55
12/03/12 924.07 13.56 0.00 910.51
06/28/13 924.07 9.97 0.00 914.10
12/30/13 924.07 12.11 0.00 911.96
06/27/14 924.07 12.07 0.00 912.00
12/30/14 924.07 12.84 0.00 911.23
06/12/15 924.07 11.74 0.00 912.33
12/17/15 924.07 8.17 0.00 915.90
03/09/16 924.07 6.90 0.00 917.17
06/21/16 924.07 8.11 0.00 915.96
12/20/16 924.07 12.62 0.00 911.45
03/21/17 924.07 10.91 0.00 913.16
06/13/17 924.07 8.30 0.00 915.77
12/05/17 924.07 13.48 0.00 910.59
09/11/18 924.07 9.00 0.00 915.07
12/18/18 924.07 5.00 0.00 919.07
03/13/19 924.07 5.60 0.00 918.47
06/12/19 924.07 6.92 0.00 917.15
09/11/19 924.07 9.39 0.00 914.68
12/20/19 924.07 6.78 0.00 917.29
03/04/20 924.07 6.19 0.00 917.88
06/03/20 924.07 5.12 0.00 918.95
09/14/20 924.07 9.44 0.00 914.63
12/09/20 924.07 6.88 0.00 917.19
03/30/21 924.07 4.82 0.00 919.25
06/24/21 924.07 9.36 0.00 914.71
09/23/21 924.07 9.71 0.00 914.36
12/14/21 924.07 12.07 0.00 912.00
03/29/22 924.07 7.64 0.00 916.43
06/16/22 924.07 10.52 0.00 913.55
DPE-20
Page 22 of 23
TABLE 2
HISTORICAL GROUNDWATER ELEVATION DATA
FORMER CONOCOPHILLIPS TERMINAL NO. 33441 (RM 6578)
115 SOUTH CHIMNEY ROCK ROAD
GREENSBORO, NORTH CAROLINA
INCIDENT NO. 7706
Well ID Date Measured Top of Casing
Elevation (ft)
Depth to
Groundwater
(ft)
LNAPL
Thickness (ft)
Groundwater
Elevation (ft)
04/28/09 922.89 2.28 0.00 920.61
06/30/09 922.89 7.57 0.00 915.32
04/28/09 921.76 6.61 0.00 915.15
06/30/09 921.76 7.21 0.00 914.55
08/31/09 921.76 10.84 0.00 910.92
11/30/09 921.76 6.96 0.00 914.80
03/25/10 921.76 5.94 0.00 915.82
06/23/10 921.76 7.68 0.00 914.08
09/29/10 921.76 10.28 0.00 911.48
12/28/10 921.76 9.26 0.00 912.50
06/30/11 921.76 8.81 0.00 912.95
09/29/11 921.76 8.21 0.00 913.55
12/20/11 921.76 7.57 0.00 914.19
03/29/12 921.76 6.56 0.00 915.20
06/28/12 921.76 9.60 0.00 912.16
09/26/12 921.76 9.00 0.00 912.76
12/03/12 921.76 10.45 0.00 911.31
06/28/13 921.76 7.09 0.00 914.67
12/30/13 921.76 9.28 0.00 912.48
06/27/14 921.76 9.60 0.00 912.16
12/30/14 921.76 10.03 0.00 911.73
06/12/15 921.76 9.43 0.00 912.33
12/17/15 921.76 6.91 0.00 914.85
03/09/16 921.76 5.55 0.00 916.21
06/21/16 921.76 7.80 0.00 913.96
12/20/16 921.76 10.33 0.00 911.43
03/21/17 921.76 9.24 0.00 912.52
06/13/17 921.76 7.36 0.00 914.40
12/05/17 921.76 11.76 0.00 910.00
09/11/18 921.76 8.24 0.00 913.52
12/18/18 921.76 4.50 0.00 917.26
03/13/19 921.76 4.81 0.00 916.95
06/12/19 921.76 6.64 0.00 915.12
09/11/19 921.76 8.30 0.00 913.46
12/20/19 921.76 5.82 0.00 915.94
03/04/20 921.76 5.00 0.00 916.76
06/03/20 921.76 4.68 0.00 917.08
09/14/20 921.76 8.24 0.00 913.52
12/09/20 921.76 5.44 0.00 916.32
03/30/21 921.76 4.07 0.00 917.69
06/24/21 921.76 7.81 0.00 913.95
09/23/21 921.76 8.62 0.00 913.14
12/14/21 921.76 10.51 0.00 911.25
03/29/22 921.76 6.23 0.00 915.53
06/16/22 921.76 9.24 0.00 912.52
DPE-23 06/28/04 921.57
PZ-1 12/02/97 924.25 13.93 0.00 910.32
PZ-2 12/02/97 924.22 13.78 0.00 910.44
PZ-3 12/02/97 923.73 13.47 0.00 910.26
PZ-4 12/02/97 923.84 14.10 0.00 909.74
Notes:
This table either only shows data dating back to 2009 or shows the last gauging event on the well if it was before 2009
LNAPL - Light Non-Aqueous Phase Liquid
Depth to groundwater measured from top of casing
Sparge well - no longer measured
DPE-21
DPE-22
Page 23 of 23
TABLE 3
GROUNDWATER ANALYTICAL DATA
FORMER CONOCOPHILLIPS TERMINAL NO. 33441 (RM 6578)
115 SOUTH CHIMNEY ROCK ROAD
GREENSBORO, NORTH CAROLINA
INCIDENT NO. 7706
1 600 600 500 20
1.19 11 68 670 19
5,000 260,000 80,000 50,000 20,000
3/27/2018 <1.0 <1.0 <1.0 <2.0 14.1
6/7/2018 <1.0 <1.0 <1.0 <2.0 16.9
9/11/2018 <1.0 <1.0 <1.0 <2.0 45.0
12/18/2018 <1.0 <1.0 <1.0 <2.0 20.6
3/13/2019 <1.0 <1.0 <1.0 <2.0 12.4
6/12/2019 <1.0 <1.0 <1.0 <2.0 31.5
9/11/2019 <1.0 <1.0 <1.0 <2.0 28.8
12/20/2019 <1.0 <1.0 <1.0 <2.0 21.2
3/4/2020 <1.0 <1.0 <1.0 <2.0 42.6
6/3/2020 <1.0 <1.0 <1.0 <2.0 44.8
9/14/2020 <1.0 <1.0 <1.0 <2.0 34.8
12/9/2020 <1.0 <1.0 <1.0 <2.0 21.7
3/30/2021 <1.0 <1.0 <1.0 <2.0 12.7
6/24/2021 <1.0 <1.0 <1.0 <2.0 38.7
9/23/2021 <1.0 <1.0 <1.0 <2.0 35.1
12/14/2021 <1.0 0.27 J <1.0 <2.0 26.4
3/29/2022 <1.0 0.64 J <1.0 <2.0 31.7
6/16/2022 <1.0 <1.0 <1.0 <2.0 32.8
3/27/2018 128 1.2 16.1 9.6 41.1
6/7/2018 172 <1.0 22.7 14.0 54.0
9/11/2018 30.8 <1.0 1.4 2.7 55.5
12/18/2018 5.2 <1.0 <1.0 <2.0 86.4
3/13/2019 157 <1.0 <1.0 <2.0 57.2
6/12/2019 49.5 <1.0 2.7 2.2 61.7
9/11/2019 25.7 1.2 2.3 <2.0 56.6
12/20/2019 29.3 <1.0 2.7 <2.0 69.4
3/4/2020 75.5 <1.0 <1.0 <2.0 69.4
6/3/2020 87.8 <1.0 3.4 2.3 65.8
9/14/2020 24.5 <1.0 <1.0 <2.0 56.0
12/9/2020 15.1 <1.0 1.8 <2.0 63.9
3/30/2021 53.0 <1.0 <1.0 <2.0 84.7
6/24/2021 50.8 <1.0 <1.0 2.0 56.2
9/23/2021 16.1 <1.0 0.73 J 0.64 J 49.5
12/14/2021 12.4 0.24 J 0.28 J <2.0 47.8
3/29/2022 21.9 0.58 J 1.9 1.6 J 53.5
6/16/2022 162 0.36 J 21.3 5.9 41.9
3/27/2018 <1.0 <1.0 <1.0 <2.0 <1.0
6/7/2018 <1.0 <1.0 <1.0 <2.0 <1.0
9/11/2018 <1.0 <1.0 <1.0 <2.0 <1.0
12/18/2018 <1.0 <1.0 <1.0 <2.0 <1.0
3/13/2019 <1.0 <1.0 <1.0 <2.0 <1.0
6/12/2019 <1.0 <1.0 <1.0 <2.0 <1.0
9/11/2019 <1.0 <1.0 <1.0 <2.0 <1.0
12/20/2019 <1.0 <1.0 <1.0 <2.0 <1.0
3/4/2020 <1.0 <1.0 <1.0 <2.0 <1.0
6/3/2020 <1.0 <1.0 <1.0 <2.0 <1.0
9/14/2020 <1.0 <1.0 <1.0 <2.0 <1.0
12/9/2020 <1.0 <1.0 <1.0 <2.0 <1.0
3/30/2021 <1.0 <1.0 <1.0 <2.0 <1.0
6/24/2021 <1.0 <1.0 <1.0 <2.0 <1.0
9/23/2021 <1.0 <1.0 <1.0 <2.0 <1.0
12/14/2021 0.32 J <1.0 <1.0 <2.0 <1.0
3/29/2022 0.30 J 0.56 J <1.0 <2.0 <1.0
6/16/2022 <1.0 <1.0 <1.0 <2.0 <1.0
Notes:
1. All measurements are in micrograms per liter (ug/L)
2. "<" or ND = None detected above method detection limit
3. 2L Standard = Title 15A NCAC 2L .0202 Groundwater Standard
4. GCL = Gross Contaminant Level established by North Carolina Department of Environmental Quality
5. MTBE = Methyl tertiary butyl ether
6. Values in BOLD indicate levels above 2L Groundwater Standards
7. J = Concentration is greater than laboratory detection limit but below reporting limit
9. 2B Standard = Applicable Title 15A NCAC 02B Surface Water Standards;
lowest of the Freshwater, Water Supply, or Human Health Standards
8. Shaded cells indicate concentration exceeds 2B Standard by a factor of 10
MW-13
MTBEWELL I.D.SAMPLE DATE Benzene Toluene Ethylbenzene Total Xylenes
2L Standards
2B Standards
GCLs
MW-11
MW-12
Page 1 of 1
TABLE 4
HISTORICAL GROUNDWATER ANALYTICAL DATA
FORMER CONOCOPHILLIPS TERMINAL NO. 33441 (RM 6578)
115 SOUTH CHIMNEY ROCK ROAD
GREENSBORO, NORTH CAROLINA
INCIDENT NO. 7706
Well I.D.Sample Date Benzene Toluene Ethylbenzene Total Xylenes MTBE
1 600 600 500 20
5,000 260,000 80,000 50,000 20,000
03/06/90 <1.0 <1.0 <1.0 <1.0 NA
08/04/90 <2.0 <2.0 <2.0 <6.0 NA
07/28/95 <1.0 <1.0 <1.0 <1.0 73
10/18/95 <1.0 <1.0 <1.0 <1.0 69
01/30/96 <1.0 <1.0 <1.0 <1.0 88
04/19/96 <1.0 <1.0 <1.0 <1.0 84
08/14/96 <1.0 <1.0 <1.0 <1.0 100
10/03/96 <1.0 <1.0 <1.0 <1.0 72
01/24/97 <1.0 <1.0 <1.0 <1.0 92
03/06/90 <1.0 <1.0 <1.0 <1.0 NA
08/04/90 <2.0 <2.0 <2.0 <6.0 NA
07/28/95 <1.0 <1.0 <1.0 <1.0 <1.0
10/18/95 <1.0 <1.0 <1.0 <1.0 <1.0
01/30/96 <1.0 <1.0 <1.0 <1.0 <1.0
04/19/96 <1.0 <1.0 <1.0 <1.0 <1.0
08/14/96 <1.0 <1.0 <1.0 <1.0 <1.0
10/03/96 <1.0 <1.0 <1.0 <1.0 <1.0
01/24/97 <1.0 <1.0 <1.0 <1.0 <1.0
03/06/90 <1.0 <1.0 <1.0 <1.0 NA
08/04/90 <2.0 <2.0 <2.0 <6.0 NA
07/28/95 <1.0 <1.0 <1.0 <1.0 <1.0
10/18/95 <1.0 <1.0 <1.0 <1.0 <1.0
01/30/96 <1.0 <1.0 <1.0 <1.0 <1.0
04/19/96 <1.0 <1.0 <1.0 <1.0 <1.0
08/14/96 <1.0 <1.0 <1.0 <1.0 <1.0
10/03/96 <1.0 <1.0 <1.0 <1.0 <1.0
01/24/97 <1.0 <1.0 <1.0 <1.0 <1.0
03/06/90 <1.0 <1.0 <1.0 <1.0 NA
08/04/90 <2.0 <2.0 <2.0 <6.0 NA
07/28/95 <1.0 <1.0 <1.0 <1.0 <1.0
10/18/95 <1.0 <1.0 <1.0 <1.0 <1.0
01/30/96 <1.0 <1.0 <1.0 <1.0 <1.0
04/19/96 <1.0 <1.0 <1.0 <1.0 <1.0
08/14/96 <1.0 <1.0 <1.0 <1.0 <1.0
10/03/96 <1.0 <1.0 <1.0 <1.0 <1.0
01/24/97 <1.0 <1.0 <1.0 <1.0 <1.0
03/06/90 <1.0 <1.0 <1.0 <1.0 NA
08/04/90 <2.0 <2.0 <2.0 <6.0 NA
07/28/95 6.3 <1.0 <1.0 <1.0 <1.0
10/18/95 6.3 <1.0 <1.0 <1.0 <1.0
01/30/96 10 <1.0 <1.0 <1.0 <1.0
04/19/96 4.1 <1.0 <1.0 <1.0 <1.0
08/14/96 1.1 <1.0 <1.0 <1.0 <1.0
10/03/96 <1.0 <1.0 <1.0 <1.0 <1.0
01/24/97 <1.0 <1.0 <1.0 <1.0 <1.0
03/06/90 <1.0 <1.0 <1.0 <1.0 NA
08/04/90 7 5 <2.0 6 NA
07/28/95 13 <1.0 <1.0 <1.0 1.2
10/18/95 28 <1.0 <1.0 1.1 1.3
01/30/96 10 <1.0 <1.0 <1.0 <1.0
04/19/96 3 <1.0 <1.0 <1.0 <1.0
08/14/96 2.3 <1.0 <1.0 <1.0 <1.0
10/03/96 1.2 <1.0 <1.0 <1.0 <1.0
01/24/97 2.4 <1.0 <1.0 <1.0 <1.0
12/21/00 <1.0 <1.0 <1.0 <1.0 <1.0
2L Standards
GCLs
MW-6
MW-1
MW-2
MW-3
MW-4
MW-5
Page 1 of 9
TABLE 4
HISTORICAL GROUNDWATER ANALYTICAL DATA
FORMER CONOCOPHILLIPS TERMINAL NO. 33441 (RM 6578)
115 SOUTH CHIMNEY ROCK ROAD
GREENSBORO, NORTH CAROLINA
INCIDENT NO. 7706
Well I.D.Sample Date Benzene Toluene Ethylbenzene Total Xylenes MTBE
1 600 600 500 20
5,000 260,000 80,000 50,000 20,000
2L Standards
GCLs
03/06/90 2,430 5,950 1,490 8,540 NA
08/04/90 1,515 2,125 <2.0 3,512 NA
07/28/95 870 33 21 250 220
10/18/95 680 <1.0 35 840 110
01/30/96 380 <1.0 <1.0 84 80
04/19/96 290 <1.0 <1.0 140 58
08/14/96 590 <10.0 12 360 84
10/03/96 290 <5.0 <5.0 80 49
01/24/97 250 <5.0 <5.0 7.7 42
06/25/97 66 <1.0 <1.0 6 19
09/10/97 600 <20 24 630 99
12/03/97 66 1.6 1.3 170 43
03/03/98 5.1 <1.0 <1.0 13 15
06/12/98 6.4 <1.0 <1.0 13 7.9
09/17/98 5.7 <1.0 <1.0 3.4 6.7
12/11/98 95 <10 15 61 26
04/26/99 2.9 <1.0 <1.0 <1.0 2.7
06/25/99 45 <1.0 1.6 39 6.8
09/21/99 <1.0 <1.0 <1.0 <1.0 <1.0
12/29/99 <1.0 <1.0 <1.0 <1.0 <1.0
03/21/00 <1.0 <1.0 <1.0 <1.0 <1.0
06/15/00 1.5 <1.0 <1.0 <1.0 <1.0
12/21/00 1.5 <1.0 <1.0 <1.0 6.4
06/07/01 4.7 <1.0 <1.0 <1.0 4.8
12/03/01 32 <1.0 <1.0 11 13
06/20/02 11 <1.0 <1.0 3.4 11
12/11/02 <1.0 <1.0 <1.0 <2.0 <1.0
06/04/03 <5.0 <5.0 <5.0 <5.0 <5.0
12/10/03 <1.0 <1.0 <1.0 <2.0 1.4
03/04/04 <1.0 <1.0 <1.0 <2.0 2.7
06/29/04 <1.0 <1.0 <1.0 <2.0 1.7
09/21/04 <1.0 <1.0 <1.0 <2.0 1
11/11/04 <1.0 <1.0 <1.0 <2.0 <1.0
03/15/05 <1.0 <1.0 <1.0 <2.0 <1.0
11/30/05 <1.0 <1.0 <1.0 <3.0 <1.0
05/25/06 <1.0 <1.0 <1.0 <3.0 1.7
11/29/06 <1.0 <1.0 <1.0 <3.0 3.7
05/18/07 <1.0 <1.0 <1.0 <3.0 4.7
10/16/07 <1.0 <1.0 <1.0 <3.0 5
10/23/08 <5.0 <5.0 <5.0 <5.0 NA
03/06/90 <1.0 <1.0 <1.0 <1.0 NA
08/04/90 <2.0 <2.0 <2.0 <6.0 NA
07/28/95 <1.0 <1.0 <1.0 <1.0 <1.0
10/18/95 <1.0 <1.0 <1.0 <1.0 <1.0
01/30/96 <1.0 <1.0 <1.0 <1.0 <1.0
04/19/96 <1.0 <1.0 <1.0 <1.0 <1.0
08/14/96 <1.0 <1.0 <1.0 <1.0 <1.0
10/03/96 <1.0 <1.0 <1.0 <1.0 <1.0
01/24/97 <1.0 <1.0 <1.0 <1.0 <1.0
08/04/90 <2.0 <2.0 <2.0 <6.0 NA
07/28/95 3.1 <1.0 <1.0 4.4 <1.0
10/18/95 <1.0 <1.0 <1.0 1.9 <1.0
01/30/96 5.2 <1.0 <1.0 23 <1.0
04/19/96 3.5 <1.0 <1.0 12 <1.0
08/14/96 <1.0 <1.0 <1.0 <1.0 <1.0
10/03/96 <1.0 <1.0 <1.0 <1.0 <1.0
01/24/97 <1.0 <1.0 <1.0 <1.0 <1.0
08/04/90 12 11 <2.0 <6.0 NA
07/28/95 <1.0 <1.0 <1.0 <1.0 27
01/30/96 5.1 <1.0 <1.0 <1.0 43
04/19/96 5 <1.0 <1.0 <1.0 39
08/14/96 <1.0 <1.0 <1.0 <1.0 2.8
10/03/96 <1.0 <1.0 <1.0 <1.0 <1.0
01/24/97 1.3 <1.0 <1.0 <1.0 28
12/21/00 <1.0 <1.0 <1.0 <1.0 48
MW-7
MW-8
MW-9
MW-10
Page 2 of 9
TABLE 4
HISTORICAL GROUNDWATER ANALYTICAL DATA
FORMER CONOCOPHILLIPS TERMINAL NO. 33441 (RM 6578)
115 SOUTH CHIMNEY ROCK ROAD
GREENSBORO, NORTH CAROLINA
INCIDENT NO. 7706
Well I.D.Sample Date Benzene Toluene Ethylbenzene Total Xylenes MTBE
1 600 600 500 20
5,000 260,000 80,000 50,000 20,000
2L Standards
GCLs
08/04/90 <2.0 <2.0 <2.0 <6.0 NA
07/28/95 <1.0 <1.0 <1.0 <1.0 57
10/18/95 <1.0 <1.0 <1.0 <1.0 64
01/30/96 1.4 <1.0 <1.0 1.1 <1.0
04/19/96 <1.0 <1.0 <1.0 <1.0 95
08/14/96 <5.0 <5.0 <5.0 <5.0 520
10/03/96 <1.0 <1.0 <1.0 <1.0 360
01/24/97 <5.0 <5.0 <5.0 <5.0 250
06/25/97 <1.0 <1.0 <1.0 <1.0 170
09/10/97 <1.0 <1.0 <1.0 <1.0 630
12/03/97 <1.0 <1.0 <1.0 <1.0 170
03/03/98 <2.0 <2.0 <2.0 <2.0 170
06/12/98 <2.5 <2.5 <2.5 <2.5 230
09/17/98 <1.0 <1.0 <1.0 <1.0 250
12/11/98 <20 <20 <20 <20 360
04/26/99 <1.0 <1.0 <1.0 <1.0 310
06/25/99 220 290 56 250 <10
09/21/99 <5.0 <5.0 <5.0 <5.0 270
12/29/99 <10 <10 <10 <10 350
03/21/00 <10 <10 <10 <10 390
06/15/00 <20 <20 <20 <20 510
12/21/00 <10 <10 <10 <10 810
06/07/01 <10 <10 <10 <10 700
12/03/01 <10 <10 <10 <20 1,100
06/20/02 <10 <10 <10 <20 1,100
12/11/02 <10 <10 <10 <20 980
06/04/03 <5 <5 <5 <5 1,400
12/10/03 <25 <25 <25 <50 1,400
03/04/04 <10 <10 <10 <20 1,600
06/29/04 <25 <25 <25 <50 1,100
09/21/04 <20 <20 <20 <40 1,400
11/11/04 <20 <20 <20 <40 510
03/15/05 <2.0 <2.0 <2.0 4.5 160
11/30/05 <2.0 <2.0 <2.0 <6.0 310
05/25/06 <5.0 <5.0 <5.0 <15 110
11/29/06 <1.0 <1.0 <1.0 <3.0 490
05/18/07 <10.0 <10.0 <10.0 <10.0 <10.0
10/23/08 <5.0 <5.0 <5.0 <5.0 NA
03/25/10 <1 <5 <5 <5 <5
06/23/10 <1 <5 <5 <5 <5
09/29/10 <1 <5 <5 <5 <5
12/29/10 <1 <5 <5 <5 <5
03/24/11 <1 <5 <5 <5 <5
06/30/11 <1 <5 <5 <5 <5
09/29/11 <0.5 <0.7 <0.8 <0.8 0.7J
12/20/11 <0.5 <0.7 <0.8 <0.8 0.7J
03/29/12 <0.5 <0.7 <0.8 <0.8 0.9J
06/28/12 <0.5 <0.7 <0.8 <0.8 0.9J
09/26/12 <0.5 <0.7 <0.8 <0.8 0.5J
12/03/12 <0.5 <0.7 <0.8 <0.8 0.7J
03/28/13 <0.5 <0.7 <0.8 <0.8 1J
06/28/13 <0.5 <0.7 <0.8 <0.8 0.9J
09/04/13 <0.5 <0.7 <0.8 <0.8 2J
12/30/13 <0.5 <0.7 <0.8 <0.8 2J
03/31/14 <0.5 <0.5 <0.5 <0.5 11
06/27/14 <0.5 <0.5 <0.5 <0.5 10
09/16/14 <0.5 <0.5 <0.5 <0.5 3
12/30/14 <0.5 <0.5 <0.5 <0.5 2
03/31/15 <0.5 <0.5 <0.5 <0.5 10
06/12/15 <0.5 <0.5 <0.5 <0.5 24
09/17/15 <0.5 <0.5 <0.5 <0.5 31
12/17/15 <0.5 <0.5 <0.5 <0.5 30
03/09/16 <0.5 <0.5 <0.5 <0.5 18
06/21/16 <0.5 <0.5 <0.5 <0.5 52
09/29/16 <0.5 <0.5 <0.5 <0.5 39
12/20/16 <0.5 <0.5 <0.5 <0.5 48
03/21/17 <1.0 <1.0 <1.0 <2.0 4.9
06/13/17 <1.0 <1.0 <1.0 <2.0 30.3
09/20/17 <1.0 <1.0 <1.0 <2.0 55.6
12/05/17 <1.0 <1.0 <1.0 <2.0 57.7
03/27/18 <1.0 <1.0 <1.0 <2.0 14.1
06/07/18 <1.0 <1.0 <1.0 <2.0 16.9
09/11/18 <1.0 <1.0 <1.0 <2.0 45.0
12/18/2018 <1.0 <1.0 <1.0 <2.0 20.6
3/13/2019 <1.0 <1.0 <1.0 <2.0 12.4
6/12/2019 <1.0 <1.0 <1.0 <2.0 31.5
9/11/2019 <1.0 <1.0 <1.0 <2.0 28.8
12/20/2019 <1.0 <1.0 <1.0 <2.0 21.2
3/4/2020 <1.0 <1.0 <1.0 <2.0 42.6
6/3/2020 <1.0 <1.0 <1.0 <2.0 44.8
9/14/2020 <1.0 <1.0 <1.0 <2.0 34.8
12/9/2020 <1.0 <1.0 <1.0 <2.0 21.7
3/30/2021 <1.0 <1.0 <1.0 <2.0 12.7
6/24/2021 <1.0 <1.0 <1.0 <2.0 38.7
9/23/2021 <1.0 <1.0 <1.0 <2.0 35.1
12/14/2021 <1.0 0.27 J <1.0 <2.0 26.4
3/29/2022 <1.0 0.64 J <1.0 <2.0 31.7
6/16/2022 <1.0 <1.0 <1.0 <2.0 32.8
MW-11
Page 3 of 9
TABLE 4
HISTORICAL GROUNDWATER ANALYTICAL DATA
FORMER CONOCOPHILLIPS TERMINAL NO. 33441 (RM 6578)
115 SOUTH CHIMNEY ROCK ROAD
GREENSBORO, NORTH CAROLINA
INCIDENT NO. 7706
Well I.D.Sample Date Benzene Toluene Ethylbenzene Total Xylenes MTBE
1 600 600 500 20
5,000 260,000 80,000 50,000 20,000
2L Standards
GCLs
08/04/90 3,445 375 <2.0 4,345 NA
01/30/96 560 <1.0 <1.0 32 <1.0
01/24/97 7.4 <1.0 <1.0 2.4 7.8
06/25/97 69 <1.0 6.2 15 9.7
03/03/98 87 <1.0 <1.0 <1.0 2.3
04/26/99 5.2 <1.0 <1.0 <1.0 4.3
06/25/99 4.5 <1.0 <1.0 <1.0 6.7
12/29/99 <1.0 <1.0 <1.0 <1.0 6.4
03/21/00 29 <1.0 4.3 11 14
06/15/00 230 <5.0 110 56 80
12/21/00 <1.0 <1.0 <1.0 1.7 21
06/07/01 43 <1.0 53 13 50
12/03/01 <1.0 <1.0 <1.0 <2.0 35
06/20/02 <1.0 <1.0 <1.0 <2.0 20
12/11/02 <1.0 <1.0 <1.0 <2.0 16
12/10/03 100 <1.0 <1.0 <2.0 25
03/04/04 78 <1.0 1.5 <2.0 31
09/21/04 79 <1.0 <1.0 2.2 32
11/11/04 4.7 <1.0 <1.0 <2.0 19
11/11/04 4.5 <1.0 <1.0 <2.0 19
11/30/05 <1.0 <1.0 <1.0 <3.0 24
05/25/06 10 <1.0 1.5 <3.0 20
11/29/06 4.4 <1.0 1.4 <3.0 26
05/18/07 160 1.1 54 67 42
05/18/07 160 <5.0 37 48 35
10/16/07 1.1 <1.0 <1.0 <3.0 33
10/16/07 <1.0 <1.0 <1.0 <3.0 19
10/23/08 11 <5.0 <5.0 <5.0 NA
04/28/09 162 <5.0 62.1 58.5 43.6
06/30/09 34 1.2 6.4 <5.0 33
11/30/09 4.3 <5 <5 <5 36
03/25/10 47 <5 <5 <5 44
06/23/10 270 <5 84 82 60
09/29/10 6.5 <5 <5 <5 46
12/29/10 3.7 <5 <5 <5 42
03/24/11 230 <5 74 65 44
06/30/11 220 <5 100 56 54
09/29/11 6 <0.7 4 <0.8 40
12/20/11 170 1 47 31 38
03/29/12 480 3 170 140 50
06/28/12 190 0.8 99 41 57
09/26/12 17 <0.7 13 4 46
12/03/12 9 <0.7 2 <0.8 46
03/28/13 170 <0.7 26 14 50
06/28/13 92 <0.7 16 12 47
09/04/13 28 <0.7 3J 2J 49
12/30/13 9 <0.7 2J 3J 47
03/31/14 37 <0.5 0.8J 1 64
06/27/14 200 2 33 29 55
09/16/14 12 <0.5 2 2 14
12/30/14 22 <0.5 11 6 52
03/31/15 89 <0.5 12 6 51
06/12/15 180 <0.5 19 11 41
09/17/15 54 <0.5 3 <0.5 46
12/17/15 34 <0.5 3 3 46
03/09/16 13 <0.5 0.8 J 0.6 J 66
06/21/16 100 <0.5 12 8 59
09/29/16 40 <0.5 2 1 60
12/20/16 9 <0.5 0.6 J 0.6 J 61
03/21/17 195 <1.0 37.3 24.2 42.1
06/13/17 47.1 <1.0 7.9 5.2 50.2
09/20/17 10.6 <1.0 <1.0 <2.0 69.4
12/05/17 3.0 <1.0 <1.0 <2.0 67.1
03/27/18 128 1.2 16.1 9.6 41.1
06/07/18 172 <1.0 22.7 14.0 54.0
09/11/18 30.8 <1.0 1.4 2.7 55.5
12/18/2018 5.2 <1.0 <1.0 <2.0 86.4
3/13/2019 157 <1.0 <1.0 <2.0 57.2
6/12/2019 49.5 <1.0 2.7 2.2 61.7
9/11/2019 25.7 1.2 2.3 <2.0 56.6
12/20/2019 29.3 <1.0 2.7 <2.0 69.4
3/4/2020 75.5 <1.0 <1.0 <2.0 69.4
6/3/2020 87.8 <1.0 3.4 2.3 65.8
9/14/2020 24.5 <1.0 <1.0 <2.0 56.0
12/9/2020 15.1 <1.0 1.8 <2.0 63.9
3/30/2021 53.0 <1.0 <1.0 <2.0 84.7
6/24/2021 50.8 <1.0 2.1 2.0 56.2
9/23/2021 16.1 <1.0 0.73 J 0.64 J 49.5
12/14/2021 12.4 0.24 J 0.28 J <2.0 47.8
3/29/2022 21.9 0.58 J 1.9 1.6 J 53.5
6/16/2022 162 0.36 J 21.3 5.9 41.9
MW-12
Page 4 of 9
TABLE 4
HISTORICAL GROUNDWATER ANALYTICAL DATA
FORMER CONOCOPHILLIPS TERMINAL NO. 33441 (RM 6578)
115 SOUTH CHIMNEY ROCK ROAD
GREENSBORO, NORTH CAROLINA
INCIDENT NO. 7706
Well I.D.Sample Date Benzene Toluene Ethylbenzene Total Xylenes MTBE
1 600 600 500 20
5,000 260,000 80,000 50,000 20,000
2L Standards
GCLs
08/04/90 74 3 <2.0 37 NA
07/28/95 45 <1.0 <1.0 2.9 29
10/18/95 160 <1.0 1.1 11 42
01/30/96 33 <1.0 <1.0 1.1 18
04/19/96 320 <1.0 <1.0 17 40
08/14/96 160 <2.0 <2.0 9.3 30
10/03/96 240 <1.0 5.9 23 29
01/24/97 320 <5.0 <5.0 13 50
06/25/97 610 <10 <10 27 88
12/03/97 390 <10 <10 30 120
06/12/98 530 <10 <10 27 270
12/11/98 1,000 <50 <50 34 *150
06/25/99 680 <20 <20 40 310
06/25/99 690 <2.0 6 45 310
09/21/99 670 <10 14 27 290
09/21/99 560 <10 15 29 200
12/29/99 280 <10 <10 <10 170
12/29/99 210 <10 <10 <10 120
03/21/00 220 <5.0 <5.0 12 93
03/21/00 220 <5.0 <5.0 12 98
06/15/00 610 <20 <20 <20 29
12/21/00 150 <5.0 <5.0 <5.0 130
06/07/01 220 <5.0 <5.0 <5.0 99
12/03/01 260 <5.0 <5.0 <10 85
06/20/02 170 <5.0 <5.0 <10 120
12/11/02 13 <5.0 <5.0 <10 17
06/04/03 35 <5.0 <5.0 <5 29
12/10/03 69 <2.0 <2.0 <4 48
03/04/04 110 <5.0 <5.0 <10 83
06/29/04 87 <1.0 <1.0 2.3 65
09/21/04 53 <1.0 <1.0 <2.0 60
11/11/04 56 <1.0 <1.0 <2.0 40
03/15/05 31 <1.0 <1.0 2 27
11/30/05 2 <1.0 <1.0 <3.0 12
05/25/06 <1.0 <1.0 <1.0 <3.0 9
11/29/06 <1.0 <1.0 <1.0 <3.0 3.4
05/18/07 <1.0 <1.0 <1.0 <3.0 3.9
10/16/07 4.3 <1.0 <1.0 <3.0 4.8
10/23/08 <5.0 <5.0 <5.0 <5.0 NA
03/25/10 <1 <5 <5 <5 <5
06/24/10 <1 <5 <5 <5 <5
09/29/10 <1 <5 <5 <5 <5
12/29/10 <1 <5 <5 <5 <5
03/24/11 <1 <5 <5 <5 <5
06/30/11 <1 <5 <5 <5 <5
09/29/11 <0.5 <0.7 <0.8 <0.8 0.6J
12/20/11 <0.5 <0.7 <0.8 <0.8 0.6J
03/29/12 <0.5 <0.7 <0.8 <0.8 0.5J
06/28/12 <0.5 <0.7 <0.8 <0.8 0.6J
09/26/12 <0.5 <0.7 <0.8 <0.8 0.7J
12/03/12 <0.5 <0.7 <0.8 <0.8 0.7J
12/03/12 <0.5 <0.7 <0.8 <0.8 0.6J
06/28/13 <0.5 <0.7 <0.8 <0.8 <0.5
09/04/13 <0.5 <0.7 <0.8 <0.8 <0.5
12/30/13 <0.5 <0.7 <0.8 <0.8 <0.5
03/31/14 <0.5 <0.5 <0.5 <0.5 0.6J
06/27/14 <0.5 <0.5 <0.5 <0.5 <0.5
09/16/14 <0.5 <0.5 <0.5 <0.5 <0.5
12/30/14 <0.5 <0.5 <0.5 <0.5 <0.5
03/31/15 <0.5 <0.5 <0.5 <0.5 <0.5
06/12/15 <0.5 <0.5 <0.5 <0.5 <0.5
09/17/15 <0.5 <0.5 <0.5 <0.5 0.8 J
12/17/15 <0.5 <0.5 <0.5 <0.5 <0.5
03/09/16 <0.5 <0.5 <0.5 <0.5 <0.5
06/21/16 <0.5 <0.5 <0.5 <0.5 <0.5
09/29/16 <0.5 <0.5 <0.5 <0.5 <0.5
12/20/16 <0.5 <0.5 <0.5 <0.5 0.5 J
03/21/17 <1.0 <1.0 <1.0 <2.0 <1.0
06/13/17 <1.0 <1.0 <1.0 <2.0 <1.0
09/20/17 <1.0 <1.0 <1.0 <2.0 <1.0
12/05/17 <1.0 <1.0 <1.0 <2.0 <1.0
03/27/18 <1.0 <1.0 <1.0 <2.0 <1.0
06/07/18 <1.0 <1.0 <1.0 <2.0 <1.0
09/11/18 <1.0 <1.0 <1.0 <2.0 <1.0
12/18/2018 <1.0 <1.0 <1.0 <2.0 <1.0
3/13/2019 <1.0 <1.0 <1.0 <2.0 <1.0
6/12/2019 <1.0 <1.0 <1.0 <2.0 <1.0
9/11/2019 <1.0 <1.0 <1.0 <2.0 <1.0
12/20/2019 <1.0 <1.0 <1.0 <2.0 <1.0
3/4/2020 <1.0 <1.0 <1.0 <2.0 <1.0
6/3/2020 <1.0 <1.0 <1.0 <2.0 <1.0
9/14/2020 <1.0 <1.0 <1.0 <2.0 <1.0
12/9/2020 <1.0 <1.0 <1.0 <2.0 <1.0
3/30/2021 <1.0 <1.0 <1.0 <2.0 <1.0
6/24/2021 <1.0 <1.0 <1.0 <2.0 <1.0
9/23/2021 <1.0 <1.0 <1.0 <2.0 <1.0
12/14/2021 0.32 J <1.0 <1.0 <2.0 <1.0
3/29/2022 0.30 J 0.56 J <1.0 <2.0 <1.0
6/16/2022 <1.0 <1.0 <1.0 <2.0 <1.0
MW-13
Page 5 of 9
TABLE 4
HISTORICAL GROUNDWATER ANALYTICAL DATA
FORMER CONOCOPHILLIPS TERMINAL NO. 33441 (RM 6578)
115 SOUTH CHIMNEY ROCK ROAD
GREENSBORO, NORTH CAROLINA
INCIDENT NO. 7706
Well I.D.Sample Date Benzene Toluene Ethylbenzene Total Xylenes MTBE
1 600 600 500 20
5,000 260,000 80,000 50,000 20,000
2L Standards
GCLs
06/05/92 <1.0 <1.0 <1.0 2 <1.0
07/28/95 <1.0 <1.0 <1.0 1.4 <1.0
10/18/95 <1.0 <1.0 <1.0 <1.0 <1.0
01/30/96 <1.0 <1.0 <1.0 <1.0 <1.0
04/19/96 <1.0 <1.0 <1.0 <1.0 <1.0
08/14/96 <1.0 <1.0 <1.0 <1.0 1.6
10/03/96 <1.0 <1.0 <1.0 <1.0 <1.0
01/24/97 <1.0 <1.0 <1.0 <1.0 <1.0
06/25/97 <1.0 <1.0 <1.0 <1.0 1.1
09/10/97 <1.0 <1.0 <1.0 <1.0 <1.0
12/03/97 <1.0 <1.0 <1.0 <1.0 1.5
03/03/98 <1.0 <1.0 <1.0 <1.0 1.3
06/12/98 <1.0 <1.0 <1.0 <1.0 2.7
09/17/98 <1.0 <1.0 <1.0 <1.0 2.2
12/11/98 <1.0 <1.0 <1.0 <1.0 3.1
04/26/99 <1.0 <1.0 <1.0 <1.0 3.4
DUP-MW-14 04/26/99 <1.0 <1.0 <1.0 <1.0 3.4
06/25/99 <1.0 <1.0 <1.0 <1.0 3.4
09/21/99 <1.0 <1.0 <1.0 <1.0 2.5
12/29/99 <1.0 <1.0 <1.0 <1.0 2.3
03/21/00 <1.0 <1.0 <1.0 <1.0 2.3
06/15/00 <1.0 <1.0 <1.0 <1.0 <1.0
12/21/00 <1.0 <1.0 <1.0 <1.0 3.1
06/07/01 <1.0 <1.0 <1.0 <1.0 1.9
12/03/01 <1.0 <1.0 <1.0 <2.0 2.6
06/20/02 <1.0 <1.0 <1.0 <2.0 2.4
12/11/02 <1.0 <1.0 <1.0 <2.0 <1.0
06/04/03 <5.0 <5.0 <5.0 <5.0 <5.0
12/10/03 <1.0 <1.0 <1.0 <2 <1
03/04/04 <1.0 <1.0 <1.0 <2 <1
06/29/04 <1.0 <1.0 <1.0 <2 <1
09/21/04 <1.0 <1.0 <1.0 <2.0 <1.0
11/11/04 <1.0 <1.0 <1.0 <2.0 <1.0
03/15/05 <1.0 <1.0 <1.0 <2.0 <1.0
11/30/05 <1.0 <1.0 <1.0 <3.0 1.2
05/25/06 <1.0 <1.0 <1.0 <3.0 1.1
11/29/06 <1.0 <1.0 <1.0 <3.0 <1.0
05/18/07 <1.0 <1.0 <1.0 <3.0 <1.0
10/16/07 <1.0 <1.0 <1.0 <3.0 1.3
10/23/08 <5.0 <5.0 <5.0 <5.0 NA
MW-14
MW-14
Page 6 of 9
TABLE 4
HISTORICAL GROUNDWATER ANALYTICAL DATA
FORMER CONOCOPHILLIPS TERMINAL NO. 33441 (RM 6578)
115 SOUTH CHIMNEY ROCK ROAD
GREENSBORO, NORTH CAROLINA
INCIDENT NO. 7706
Well I.D.Sample Date Benzene Toluene Ethylbenzene Total Xylenes MTBE
1 600 600 500 20
5,000 260,000 80,000 50,000 20,000
2L Standards
GCLs
06/05/92 <1.0 <1.0 <1.0 <1.0 <1.0
07/28/95 93 100 110 290 11
10/18/95 110 58 89 230 12
01/30/96 75 140 190 550 <1.0
04/19/96 29 79 110 320 <1.0
08/14/96 <50 87 220 640 <50
10/03/96
01/24/97 18 49 380 760 <10
06/25/97 29 53 72 140 <1.0
09/10/97 41 51 86 140 <5.0
12/03/97 20 22 11 36 <1.0
03/03/98 8.2 13 5 14 <1.0
06/12/98 13 12 3.2 9 <1.0
09/17/98 14 22 9.3 23 <1.0
12/11/98 66 140 28 99 <10
04/26/99
06/25/99 13 34 10 29 <1.0
09/21/99 7.7 15 7.8 10 <1.0
12/29/99 6.4 5.9 7.9 10 <1.0
03/21/00 4.7 14 5.6 15 <1.0
06/15/00 <1.0 <1.0 <1.0 <1.0 <1.0
12/21/00 3 4.2 6 9.9 <1.0
06/07/01 1.2 <1.0 3.2 2.7 <1.0
12/03/01 <1.0 <1.0 1.1 <2.0 <1.0
06/20/02 <1.0 <1.0 <1.0 <2.0 <1.0
12/11/02 <1.0 <1.0 <1.0 <2.0 <1.0
06/04/03 <5.0 <5.0 <5.0 <5.0 <5.0
12/10/03 <1.0 <1.0 <1.0 <2.0 <1.0
03/04/04 <1.0 <1.0 <1.0 <2.0 <1.0
06/29/04 <1.0 <1.0 <1.0 <2.0 <1.0
09/21/04 <1.0 <1.0 <1.0 <2.0 <1.0
11/11/04 <1.0 <1.0 <1.0 <2.0 <1.0
03/15/05 <1.0 <1.0 <1.0 <2.0 <1.0
11/30/05 <1.0 <1.0 <1.0 <3.0 <1.0
05/25/06 <1.0 <1.0 <1.0 <3.0 <1.0
11/28/06 <1.0 <1.0 <1.0 <3.0 <1.0
05/18/07 <1.0 <1.0 <1.0 <3.0 <1.0
10/16/07 <1.0 <1.0 <1.0 <3.0 <1.0
06/05/92 <1.0 <1.0 <1.0 <1.0 <1.0
10/18/95 <1.0 <1.0 <1.0 <1.0 <1.0
01/30/96 <1.0 <1.0 <1.0 <1.0 <1.0
04/19/96 <1.0 <1.0 <1.0 <1.0 <1.0
08/14/96 <1.0 <1.0 <1.0 <1.0 <1.0
10/03/96 <1.0 <1.0 <1.0 <1.0 <1.0
01/24/97 <1.0 <1.0 <1.0 <1.0 <1.0
06/25/97 <1.0 <1.0 <1.0 <1.0 <1.0
09/10/97 <1.0 <1.0 <1.0 <1.0 <1.0
12/03/97 <1.0 <1.0 <1.0 <1.0 <1.0
03/03/98 <1.0 <1.0 <1.0 <1.0 <1.0
06/12/98 <1.0 <1.0 <1.0 <1.0 <1.0
09/17/98 <1.0 <1.0 <1.0 <1.0 <1.0
12/11/98 <1.0 <1.0 <1.0 <1.0 <1.0
04/26/99 NA NA NA NA NA
06/25/99 <1.0 <1.0 <1.0 <1.0 <1.0
09/21/99 <1.0 <1.0 <1.0 <1.0 <1.0
12/29/99 <1.0 <1.0 <1.0 <1.0 <1.0
03/21/00 <1.0 <1.0 <1.0 <1.0 <1.0
06/15/00 <1.0 <1.0 <1.0 <1.0 <1.0
12/21/00 <1.0 <1.0 <1.0 <1.0 <1.0
06/07/01 <1.0 <1.0 <1.0 <1.0 <1.0
12/03/01 <1.0 <1.0 <1.0 <2.0 <1.0
06/20/02 <1.0 <1.0 <1.0 <2.0 <1.0
12/11/02 <1.0 <1.0 <1.0 <2.0 <1.0
06/04/03 <5.0 <5.0 <5.0 <5.0 <5.0
04/01/04
HYDROCARBON SHEEN DETECTED - NO SAMPLES COLLECTED
HYDROCARBON SHEEN DETECTED - NO SAMPLES COLLECTED
ABANDONED
MW-15
MW-16
Page 7 of 9
TABLE 4
HISTORICAL GROUNDWATER ANALYTICAL DATA
FORMER CONOCOPHILLIPS TERMINAL NO. 33441 (RM 6578)
115 SOUTH CHIMNEY ROCK ROAD
GREENSBORO, NORTH CAROLINA
INCIDENT NO. 7706
Well I.D.Sample Date Benzene Toluene Ethylbenzene Total Xylenes MTBE
1 600 600 500 20
5,000 260,000 80,000 50,000 20,000
2L Standards
GCLs
09/24/90 <2.0 <2.0 <2.0 <6.0 NA
07/28/95 <1.0 <1.0 <1.0 <1.0 20
10/18/95 <1.0 <1.0 <1.0 <1.0 31
01/30/96 <1.0 <1.0 <1.0 <1.0 32
04/19/96 <1.0 <1.0 <1.0 <1.0 30
08/14/96 <1.0 <1.0 <1.0 <1.0 28
10/03/96 <1.0 <1.0 <1.0 <1.0 25
01/24/97 <1.0 <1.0 <1.0 <1.0 26
09/24/90 <2.0 16 <2.0 29 NA
07/28/95 1.6 <1.0 <1.0 <1.0 <1.0
10/18/95 <1.0 <1.0 <1.0 <1.0 <1.0
01/30/96 <1.0 <1.0 <1.0 <1.0 <1.0
04/19/96 1.3 <1.0 <1.0 <1.0 <1.0
08/14/96 4.6 <1.0 <1.0 4 <1.0
10/03/96 9.3 <1.0 1.4 11 4
01/24/97 6.2 <1.0 1.2 7.3 <1.0
06/25/97 7.2 <1.0 <1.0 4.3 5.4
12/03/97 2.3 <1.0 <1.0 2.8 9.5
03/03/98 17 2.1 2.1 25 9.3
06/12/98 34 3 <1.0 110 12
09/17/98 3.2 <1.0 <1.0 4.4 9
09/17/98 3.5 <1.0 <1.0 4.3 9.1
12/11/98 1 <1.0 <1.0 <1.0 11
04/26/99 1 <1.0 <1.0 1.4 22
06/25/99 <1.0 <1.0 <1.0 <1.0 20
09/21/99 2 <1.0 <1.0 2.3 1.3
12/29/99 2.9 <1.0 1.2 5.8 3.3
03/21/00 <1.0 <1.0 <1.0 <1.0 8
06/15/00 <1.0 <1.0 <1.0 <1.0 20
12/21/00 <1.0 <1.0 <1.0 <1.0 11
06/07/01 <1.0 <1.0 <1.0 <1.0 9
12/03/01 <1.0 <1.0 <1.0 <2.0 13
06/20/02 <1.0 <1.0 <1.0 <2.0 5.6
Duplicate DW-06/20/02 <1.0 <1.0 <1.0 <2.0 6.2
DW-2 12/11/02 11 <1.0 6.3 32 <1.0
Duplicate DW-12/11/02 11 <1.0 6.1 31 <1.0
DW-2 06/04/03 17 <5.0 7 37 <5.0
Duplicate DW-06/04/03 19 <5.0 8 41 <5.0
DW-2 12/10/03 7.4 <1.0 4.2 20 <1.0
Duplicate DW-12/10/03 7.6 <1.0 4.2 22 <1.0
DW-2 03/04/04 24 1.9 17 76 <1.0
Duplicate DW-03/05/04 21 1.7 15 68 <1.0
06/29/04 <1.0 <1.0 <1.0 <2.0 3
09/21/04 <1.0 <1.0 <1.0 <2.0 <1
11/11/04 <1.0 <1.0 <1.0 <2.0 1.2
03/15/05 <1.0 <1.0 <1.0 <2.0 <1.0
11/30/05 <1.0 <1.0 <1.0 <3.0 <1.0
05/25/06 <1.0 <1.0 <1.0 <3.0 <1.0
11/28/06 <1.0 <1.0 <1.0 <3.0 <1.0
05/18/07 <1.0 <1.0 <1.0 <3.0 <1.0
10/16/07 <1.0 <1.0 <1.0 <3.0 <1.0
DW-2
DW-1
DW-2
Page 8 of 9
TABLE 4
HISTORICAL GROUNDWATER ANALYTICAL DATA
FORMER CONOCOPHILLIPS TERMINAL NO. 33441 (RM 6578)
115 SOUTH CHIMNEY ROCK ROAD
GREENSBORO, NORTH CAROLINA
INCIDENT NO. 7706
Well I.D.Sample Date Benzene Toluene Ethylbenzene Total Xylenes MTBE
1 600 600 500 20
5,000 260,000 80,000 50,000 20,000
2L Standards
GCLs
09/24/90 <2.0 <2.0 <2.0 <6.0 NA
07/28/95 130 <1.0 <1.0 2.4 <1.0
10/18/95 150 <1.0 <1.0 3 <1.0
01/30/96 180 <1.0 <1.0 5.8 <1.0
04/19/96 98 <1.0 <1.0 <1.0 <1.0
08/14/96 110 <5.0 <5.0 <5.0 <5.0
10/03/96 110 <1.0 <1.0 4 <1.0
01/24/97 85 <1.0 <1.0 1.2 <1.0
06/25/97 65 <1.0 <1.0 <1.0 <1.0
09/10/97 11 <1.0 <1.0 <1.0 <1.0
12/03/97 33 <1.0 <1.0 1.5 <1.0
03/03/98 67 <1.0 <1.0 1.9 1
06/12/98 61 <1.0 <1.0 <1.0 1.5
09/17/98 100 <1.0 <1.0 1.5 1.4
12/11/98 <1.0 <1.0 <1.0 <1.0 <1.0
04/26/99 37 <1.0 <1.0 <1.0 3
06/25/99 71 <1.0 <1.0 <1.0 2
09/21/99 68 <2.0 <2.0 <2.0 <2.0
12/29/99 66 <2.5 <2.5 <2.5 <2.5
03/21/00 56 <1.0 <1.0 <1.0 1.5
06/15/00 69 <1.0 <1.0 <1.0 <1.0
12/21/00 56 <1.0 <1.0 <1.0 2
06/07/01 54 <1.0 <1.0 <1.0 1.6
12/03/01 40 <1.0 <1.0 <2.0 1.7
06/20/02 58 <1.0 <1.0 <2.0 1.7
12/11/02 57 <1.0 <1.0 <2.0 1.4
06/04/03 23 <5.0 <5.0 <5.0 <5.0
12/10/03 22 <1.0 <1.0 <2.0 <1.0
03/04/04 23 <1.0 <1.0 <2.0 <1.0
06/29/04 <1.0 <1.0 <1.0 <2.0 <1.0
09/21/04 <1.0 <1.0 <1.0 <2.0 <1.0
11/11/04 <1.0 <1.0 <1.0 <2.0 2.4
03/15/05 <1.0 <1.0 <1.0 <2.0 <1.0
11/30/05 <1.0 <1.0 <1.0 <3.0 <1.0
05/25/06 <1.0 <1.0 <1.0 <3.0 <1.0
11/28/06 <1.0 <1.0 <1.0 <3.0 <1.0
05/18/07 <1.0 <1.0 <1.0 <3.0 <1.0
10/16/07 <1.0 <1.0 <1.0 <3.0 <1.0
Notes:
1. All measurements are in micrograms per liter (ug/L)
2. "<" or ND = None detected above method detection limit.
3. 2L Standard = Title 15A NCAC 2L .0202 Groundwater Standard
4. GCL = Gross Contaminant Level established by NCDEQ
5. MTBE = Methyl tertiary butyl ether
6. Values in BOLD indicate levels above 2L Groundwater Standards.
7. NA - Not analyzed or data not available
8. J = Concentration is greater than laboratory detection limit but below reporting limit.
DW-3
Page 9 of 9
TABLE 5
NATURAL ATTENUATION PARAMETER DATA
FORMER CONOCOPHILLIPS TERMINAL NO. 33441 (RM 6578)
115 SOUTH CHIMNEY ROCK ROAD
GREENSBORO, NORTH CAROLINA
INCIDENT NO. 7706
Well I.D.Sample Date Temperature
(° Celcius)
pH
(std. Units)
ORP
(mV)
Cond.
(mS/cm)
DO
(mg/L)
Turbidity
(NTU)
06/30/11 19.6 4.38 273 0.066 8.5 NM
09/29/11 21.7 5.07 193 0.127 6.3 NM
12/20/11 16.5 4.72 241 0.097 7.4 NM
03/29/12 14.8 6.85 130 0.058 5.7 NM
06/28/12 18.9 5.20 146 0.039 2.9 NM
09/26/12 21.1 5.00 137 0.066 7.4 NM
12/03/12 15.1 6.90 132 0.060 5.9 NM
06/28/13 18.2 5.40 179 0.073 6.3 NM
12/30/13 17.5 5.30 198 0.066 6.2 NM
06/27/14 18.6 5.30 148 0.038 2.4 NM
12/30/14 17.4 5.70 164 0.059 5.2 NM
06/12/15 18.5 6.10 107 0.041 2.1 NM
09/17/15 19.3 5.92 82 0.024 10.2 NM
12/17/15 17.4 5.49 234 0.052 7.4 NM
03/09/16 15.5 5.15 271 0.049 1.6 NM
06/21/16 17.8 6.31 94 0.051 3.3 NM
09/29/16 19.8 5.48 88 0.0404 2.5 NM
12/20/16 18.2 5.94 116 0.052 2.3 NM
03/21/17 17.7 5.59 148 0.042 5.1 NM
06/13/17 27.5 6.15 108 0.050 4.0 NM
09/20/17 19.3 5.72 92.7 0.0593 2.24 >1000
12/05/17 19.0 5.61 114.9 0.0552 1.39 >1000
03/27/18 13.8 6.36 101.6 0.044 6.17 NM
06/07/18 16.4 5.08 164.0 0.0386 2.57 out of range
09/11/18 22.5 4.62 209.5 0.0561 1.52 out of range
12/18/18 17.4 5.94 219.2 0.0598 1.94 out of range
03/13/19 15.5 5.94 188.0 0.0496 2.75 out of range
06/12/19 16.5 4.96 164.4 0.0567 3.56 NM
09/11/19 21.0 5.06 -31.1 0.0671 1.67 NM
12/20/19 17.2 5.71 11.7 0.0535 2.78 out of range
03/04/20 15.9 5.49 185.0 0.056 1.28 out of range
06/03/20 17.02 5.44 113.8 0.057 1.75 out of range
09/14/20 20.4 4.34 123.9 0.0592 1.55 out of range
12/09/20 18.39 5.52 88.9 0.053 3.06 out of range
3/30/2021 15.4 6.48 164.4 0.00651 2.54 out of range
6/24/2021 16.98 5.56 158.2 0.094 NM out of range
9/23/2021 19.4 5.66 129.0 0.0526 1.75 out of range
12/14/2021 17.4 5.65 302.1 0.0618 2.54 out of range
3/29/2022 14.8 5.17 290.9 0.0561 2.15 out of range
6/16/2022 17.2 5.84 5.86 0.0493 2.90 out of range
06/30/11 20.3 6.95 49 3.2 0.2 NM
09/29/11 20.2 8.78 32 0.365 0.3 NM
12/20/11 16.8 7.86 28 0.682 0.2 NM
03/29/12 15.0 7.95 40 0.514 3.3 NM
06/28/12 19.7 6.00 0 0.280 1.4 NM
09/26/12 20.1 5.50 29 0.668 4.0 NM
12/03/12 15.3 7.70 34 0.582 3.6 NM
06/28/13 18.2 7.20 30 0.899 1.9 NM
12/30/13 18.0 7.13 28 0.516 1.3 NM
06/27/14 19.3 6.10 10 0.289 1.9 NM
12/30/14 17.7 7.00 25 0.572 2.2 NM
06/12/15 19.4 6.10 24 0.264 4.1 NM
09/17/15 18.5 9.36 -55 0.279 9.5 NM
12/17/15 16.7 5.91 -40 0.602 4.3 NM
03/09/16 14.7 8.04 40 0.637 9.7 NM
06/21/16 16.9 6.43 109 0.484 4.1 NM
09/29/16 19.4 6.38 -42 0.465 2.3 NM
12/20/16 15.7 6.65 -14 0.508 3.7 NM
03/21/17 17.6 8.68 73 0.247 12.3 NM
06/13/17 17.1 7.00 67.3 0.479 4.6 NM
09/20/17 18.7 6.57 44.2 0.550 2.43 >1000
12/05/17 18.1 6.51 -25.5 0.577 2.37 502
03/27/18 13.2 6.50 -7.1 0.553 2.04 9.89
06/07/18 17.3 6.18 -3.6 0.449 1.36 101
09/11/18 20.9 6.34 -29.1 0.690 0.99 184
12/18/18 15.6 6.51 -24.9 0.611 1.32 151
03/13/19 14.6 404.80 -6.2 0.4048 1.99 out of range
06/12/19 17.1 6.22 -22.4 0.5658 1.46 NM
09/11/19 22.1 5.81 -61.0 0.4892 1.09 NM
12/20/19 15.7 6.22 -50.4 0.4672 2.24 312
03/04/20 15.1 6.21 13.2 0.498 1.02 232
06/03/20 17.35 6.15 43.3 0.443 1.06 out of range
09/14/20 19.5 6.15 -11.1 0.4626 0.60 out of range
12/09/20 15.20 6.16 25.8 0.482 1.81 139
3/30/2021 14.5 6.36 48.1 0.443 1.70 252
6/24/2021 16.97 6.14 -171.1 0.480 NM 84.2
9/23/2021 18.7 7.08 147.9 0.829 3.30 165
12/14/2021 17.0 7.21 251.8 0.802 3.20 out of range
3/29/2022 14.2 6.13 239.5 0.5807 3.20 334
6/16/2022 17.0 7.10 301.6 0.5879 6.99 out of range
MW-11
MW-12
Page 1 of 3
TABLE 5
NATURAL ATTENUATION PARAMETER DATA
FORMER CONOCOPHILLIPS TERMINAL NO. 33441 (RM 6578)
115 SOUTH CHIMNEY ROCK ROAD
GREENSBORO, NORTH CAROLINA
INCIDENT NO. 7706
Well I.D.Sample Date Temperature
(° Celcius)
pH
(std. Units)
ORP
(mV)
Cond.
(mS/cm)
DO
(mg/L)
Turbidity
(NTU)
06/30/11 19.5 5.24 220 0.079 0.7 NM
09/29/11 21.2 5.51 159 0.071 0.9 NM
12/20/11 17.4 5.37 171 0.075 0.8 NM
03/29/12 16.8 5.52 230 0.072 4.8 NM
06/28/12 20.3 5.10 151 0.064 1.6 NM
09/26/12 21.4 4.80 169 0.101 7.7 NM
12/03/12 17.0 5.90 198 0.081 4.8 NM
06/28/13 19.1 5.30 185 0.078 3.0 NM
12/30/13 18.6 5.40 185 0.075 2.0 NM
06/27/14 20.0 5.00 160 0.060 1.5 NM
12/30/14 18.7 5.40 182 0.073 2.8 NM
06/12/15 19.6 5.90 141 0.068 1.8 NM
09/17/15 19.3 5.13 70 0.040 9.6 NM
12/17/15 18.5 5.04 169 0.085 2.9 NM
03/09/16 16.7 4.67 2 0.093 4.8 NM
06/21/16 19.0 5.86 95 0.090 2.4 NM
09/29/16 22.9 5.10 110 0.066 1.6 NM
12/20/16 19.5 5.14 78 0.101 1.6 NM
03/21/17 17.4 5.26 58 0.107 4.3 NM
06/13/17 19.5 4.52 122 0.092 3.1 86
09/20/17 21.3 5.10 89.4 0.0868 1.69 62.8
12/05/17 20.3 5.48 57.9 0.1382 4.55 86
03/27/18 15.4 5.78 72.5 0.0870 4.78 103
06/07/18 17.9 5.37 105.4 96.9 1.78 117
09/11/18 24.5 5.15 159.1 0.0986 2.12 63.9
12/18/18 17.0 5.79 142.1 0.0831 4.60 101
03/13/19 17.3 5.70 115.1 86.1 2.14 45.8
06/12/19 18.6 6.53 85.4 72.4 5.16 NM
09/11/19 22.9 5.03 -23.6 129.2 1.31 NM
12/20/19 18.2 5.67 30.7 117.4 2.16 102
03/04/20 16.4 5.66 89.1 0.114 2.60 192
06/03/20 23.65 5.51 104.4 0.100 1.77 96.0
09/14/20 23.0 5.94 51.6 0.1716 1.03 105.6
12/09/20 17.64 5.78 39.0 0.189 1.73 355
3/30/2021 15.2 6.25 93.1 0.0624 5.10 218
6/24/2021 18.32 5.87 -169.4 0.177 NM 115
9/23/2021 20.1 5.62 131.9 0.1241 1.92 21.1
12/14/2021 19.1 6.10 231.8 0.2752 3.07 88.2
3/29/2022 16.0 5.42 289.3 0.1591 2.87 82.2
6/16/2022 18.7 6.01 342.1 0.1855 1.61 65.6
06/30/11 19.9 6.29 202 0.037 3.6 62.8
09/29/11 21.0 6.20 190 0.069 4.2 NM
12/20/11 16.9 6.80 186 0.041 5.5 NM
03/29/12 15.2 5.83 207 0.039 5.5 NM
06/28/12 20.2 6.60 -32 0.087 5.2 NM
09/26/12 19.7 5.00 151 0.051 5.5 NM
12/03/12 16.2 5.90 175 0.042 5.4 NM
06/28/13 18.4 6.10 154 0.052 5.0 NM
12/30/13 18.3 6.40 133 0.052 4.9 NM
06/27/14 19.7 6.50 -25 0.091 4.2 NM
12/30/14 18.2 6.20 109 0.059 4.9 NM
06/12/15 19.7 6.60 -8 0.087 2.7 NM
12/17/15 NM NM NM NM 3.2 NM
03/09/15 NM NM NM NM 4.3 NM
06/21/16 NM NM NM NM 0.9 NM
12/20/16 NM NM NM NM 2.9 NM
03/21/17 15.8 6.30 120 0.033 6.51 NM
06/13/17 NM NM NM NM 3.11 NM
12/05/17 NM NM NM NM 2.52 NM
12/18/18 NM NM NM NM 2.63 NM
03/04/20 NM NM NM NM 2.04 NM
06/03/20 NM NM NM NM 3.22 NM
09/14/20 NM NM NM NM 1.31 NM
12/09/20 NM NM NM NM 2.90 NM
03/29/22 NM NM NM NM 2.75 NM
06/16/22 NM NM NM NM 2.83 NM
MW-13
DPE-11
Page 2 of 3
TABLE 5
NATURAL ATTENUATION PARAMETER DATA
FORMER CONOCOPHILLIPS TERMINAL NO. 33441 (RM 6578)
115 SOUTH CHIMNEY ROCK ROAD
GREENSBORO, NORTH CAROLINA
INCIDENT NO. 7706
Well I.D.Sample Date Temperature
(° Celcius)
pH
(std. Units)
ORP
(mV)
Cond.
(mS/cm)
DO
(mg/L)
Turbidity
(NTU)
06/30/11 20.7 6.87 103 0.310 0.2 NM
09/29/11 20.6 6.50 100 0.418 0.4 NM
12/20/11 17.2 6.40 97 0.487 0.3 NM
03/29/12 15.8 6.51 177 0.347 4.9 NM
06/28/12 21.6 6.70 10 0.324 1.5 NM
09/26/12 20.9 5.60 4 0.309 5.0 NM
12/03/12 16.3 6.60 3 0.332 4.9 NM
06/28/13 19.0 6.50 71 0.361 2.5 NM
12/30/13 19.0 6.64 53 0.363 1.7 NM
06/27/14 21.3 6.60 15 0.320 1.6 NM
12/30/14 18.9 6.60 36 0.344 2.7 NM
06/12/15 19.1 6.70 7 0.342 1.7 NM
12/17/15 NM NM NM NM 2.0 NM
03/09/16 NM NM NM NM 5.3 NM
06/21/16 NM NM NM NM 0.79 NM
12/20/16 NM NM NM NM 1.75 NM
03/21/17 15.7 7.40 93 0.137 10.82 NM
06/13/17 NM NM NM NM 1.58 NM
12/05/17 NM NM NM NM 1.22 NM
12/18/18 NM NM NM NM 5.63 NM
03/04/20 NM NM NM NM 0.10 NM
06/03/20 NM NM NM NM 1.25 NM
09/14/20 NM NM NM NM 0.48 NM
12/09/20 NM NM NM NM 0.21 NM
03/29/22 NM NM NM NM 1.14 NM
06/16/22 NM NM NM NM 1.90 NM
06/30/11 21.9 4.44 305 0.027 4.8 NM
09/29/11 20.1 4.60 291 0.053 5.2 NM
12/20/11 16.8 4.60 278 0.032 4.1 NM
03/29/12 17.4 5.13 253 0.029 3.8 NM
06/28/12 20.1 4.50 183 0.022 1.4 NM
09/26/12 21.8 4.50 217 0.036 5.6 NM
12/03/12 17.0 5.30 204 0.029 4.2 NM
06/28/13 19.3 4.70 247 0.033 4.2 NM
12/30/13 19.0 4.71 243 0.028 3.6 NM
06/27/14 20.0 4.80 176 0.018 1.6 NM
12/30/14 18.8 4.90 217 0.027 3.4 NM
06/12/15 20.0 5.40 151 0.010 1.4 NM
12/17/15 NM NM NM NM 4.3 NM
03/09/16 NM NM NM NM 2.6 NM
06/21/16 NM NM NM NM 1.26 NM
12/20/16 NM NM NM NM 4.03 NM
03/21/17 19.6 4.42 199 0.021 4.31 NM
06/13/17 NM NM NM NM 0.72 NM
12/05/17 NM NM NM NM 1.13 NM
12/18/18 NM NM NM NM 1.52 NM
03/04/20 NM NM NM NM 0.56 NM
06/03/20 NM NM NM NM 1.31 NM
09/14/20 NM NM NM NM 0.48 NM
12/09/20 NM NM NM NM 2.08 NM
03/29/22 NM NM NM NM 1.99 NM
06/16/22 NM NM NM NM 1.52 NM
06/30/11 21.5 8.09 -15 0.286 0.4 NM
09/29/11 21.1 7.80 -16 0.525 0.5 NM
12/20/11 17.1 7.90 -15 0.396 0.4 NM
03/29/12 15.3 6.11 203 0.413 3.7 NM
06/28/12 22.8 6.53 65 0.332 1.6 NM
09/26/12 20.7 4.80 193 0.248 6.7 NM
12/03/12 15.9 6.20 198 0.246 4.0 NM
06/28/13 19.2 6.80 88 0.349 2.5 NM
12/30/13 19.3 7.18 58 0.315 1.6 NM
06/27/14 22.5 6.60 72 0.347 1.7 NM
12/30/14 19.2 6.70 104 3.000 2.4 NM
06/12/15 20.1 6.70 84 0.361 1.4 NM
12/17/15 NM NM NM NM 8.3 NM
03/09/16 NM NM NM NM 5.0 NM
06/21/16 NM NM NM NM 3.1 NM
12/20/16 NM NM NM NM 0.8 NM
03/21/17 15.2 5.20 164 0.273 3.76 NM
06/13/17 NM NM NM NM 1.34 NM
12/05/17 NM NM NM NM 3.98 NM
12/18/18 NM NM NM NM 1.13 NM
03/04/20 NM NM NM NM 0.09 NM
06/03/20 NM NM NM NM 1.53 NM
09/14/20 NM NM NM NM 0.29 NM
12/09/20 NM NM NM NM 0.83 NM
03/29/22 NM NM NM NM 0.99 NM
06/16/22 NM NM NM NM 1.58 NM
Notes:
1. DO - Dissolved oxygen
2. ORP - Oxygen reduction potential
3. mg/L - Milligrams per liter
4. mS/cm - milliSiemens per centimeter
5. mV - millivolts
6. NM - Not Measured
DPE-20
DPE-22
DPE-14
Page 3 of 3

Former ConocoPhillips Terminal No. 33441 (RM #6578)
August 1, 2022

ATC Project No. P666578109 Phillips 66 Company

FIGURES
TOPOGRAPHIC MAP
1"= 2,000'
1
Project Number:
Date:Scale:
Drawing File:
Figure:
App'd By:
Drn. By:
Ckd. By:
N
H:\2021\OTHER OFFICES\NORTH CAROLINA\NCDEQ-STATE LEAD\FORMER CONOCO #6578\P666578701-VIC.DWG, FIG107/26/2021
SEE LOWER LEFT
FORMER CONOCOPHILLIPS TERMINAL NO. 33441 (RM #6579)
115 SOUTH CHIMNEY ROCK ROAD
GREENSBORO, GUILFORD COUNTY, NORTH CAROLINA
P666578701 DH
NK
NK
SOUTH CHIMNEY ROCK ROAD
BURNT POPLAR ROADINTE
R
S
T
A
T
E

I
-
7
3 LEGEND:SITE PROPERTY LINENOTE: ALL LOCATIONS ARE APPROXIMATEPARCEL LINELONG BRANCHTANK4XXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXX
X
XXXXXXXX
X
X
X
XX
X
X
XX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
X
X
XXXXXXXXXXXXXXXXXX
TANK3TANK9TANK1TANK2TANK5TANK6TANK7TANK8STORMWATERPONDMW-1DW-1MW-2MW-3MW-4MW-5MW-6MW-15MW-14MW-9MW-7MW-13MW-12MW-8MW-16MW-10MW-11AI-1AI-4AI-2AI-3DW-3DW-5DW-4DPE-3DPE-2DW-2DPE-7DPE-17DPE-12DPE-13DPE-15DPE-23DPE-22DPE-21DPE-20DPE-19DPE-18DPE-9DPE-11DPE-10DPE-8DPE-6DPE-16DPE-1DPE-14SCALE: 1" = 100'1000251005075NAIR SPARGESYSTEMFUEL OILTANKMW-1TYPE II MONITORING WELLWell IdentificationMW-4DW-1TYPE III MONITORING WELLWell IdentificationABANDONED MONITORING WELLWell IdentificationDPE-15AI-1AIR SPARGE WELLWell IdentificationAIR INJECTION WELLWell IdentificationDPE-6MONITORING WELL / FORMERDUAL-PHASE EXTRATION WELLWell IdentificationXXFENCEFigure:Drawing File:
Project Number:
Ckd. By:
Drn. By:
App'd By:
Ckd. Date:Scale:Date:H:\2021\OTHER OFFICES\NORTH CAROLINA\NCDEQ-STATE LEAD\FORMER CONOCO #6578\P666578701-SITE.DWG, FIG2
SITE MAP07/26/2021SEE LOWER LEFTFORMER CONOCOPHILLIPS TERMINAL NO. 33441 (RM #6579)
115 SOUTH CHIMNEY ROCK ROAD
GREENSBORO, GUILFORD COUNTY, NORTH CAROLINA
P666578701AS SHOWNDH
NK2NOTES:
1.Features shown are not an authoritative location, nor are they presented
to a stated accuracy.
COORDINATE SYSTEM:
NAD 1983 NORTH CAROLINA STATE PLANE FIPS 3200, US SURVEY FEET
SOUT
H

C
H
I
M
N
E
Y

R
O
C
K

R
O
A
DBURNT POPLAR ROADINTE
R
S
T
A
T
E

I
-
7
3
50SCALE: 1" = 200'2000100150200NLEGEND:SITE PROPERTY LINENOTE: ALL LOCATIONS ARE APPROXIMATEPARCEL LINELONG BRANCHON-SITERETENTION PONDSITE500 FT.RADIUS1,000 FT.RADIUSFigure:Drawing File:
Project Number:
Ckd. By:
Drn. By:
App'd By:
Ckd. Date:Scale:Date:H:\2021\OTHER OFFICES\NORTH CAROLINA\NCDEQ-STATE LEAD\FORMER CONOCO #6578\P666578701-WSW.DWG, FIG3
POTENTIAL RECEPTOR MAP07/26/2021SEE LOWER LEFTFORMER CONOCOPHILLIPS TERMINAL NO. 33441 (RM #6579)
115 SOUTH CHIMNEY ROCK ROAD
GREENSBORO, GUILFORD COUNTY, NORTH CAROLINA
P666578701AS SHOWNDH
NK3NOTES:
1.Features shown are not an authoritative location, nor are they presented
to a stated accuracy.
COORDINATE SYSTEM:
NAD 1983 NORTH CAROLINA STATE PLANE FIPS 3200, US SURVEY FEET
SOUTH CHIMNEY ROCK ROAD
BURNT POPLAR ROADINTE
R
S
T
A
T
E

I
-
7
3 LEGEND:SITE PROPERTY LINENOTE: ALL LOCATIONS ARE APPROXIMATEPARCEL LINELONG BRANCHTANK4XXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXX
X
XXXXXXXX
X
X
X
XX
X
X
XX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
X
X
XXXXXXXXXXXXXXXXXX
TANK3TANK9TANK1TANK2TANK5TANK6TANK7TANK8STORMWATERPONDMW-1DW-1*MW-2MW-3MW-4MW-5MW-6MW-15MW-14MW-9MW-7MW-13MW-12*MW-8*MW-16MW-10MW-11AI-1AI-4AI-2AI-3DW-3DW-5DW-4DPE-3DPE-2DW-2DPE-7DPE-17DPE-12DPE-13DPE-15DPE-23DPE-22DPE-21DPE-20DPE-19DPE-18DPE-9DPE-11DPE-10DPE-8DPE-6DPE-16DPE-1DPE-14AIR SPARGESYSTEMFUEL OILTANKMW-4DW-1TYPE III MONITORING WELLWell IdentificationABANDONED MONITORING WELLWell IdentificationDPE-15AI-1AIR SPARGE WELLWell IdentificationAIR INJECTION WELLWell IdentificationDPE-6MONITORING WELL / FORMERDUAL-PHASE EXTRATION WELLWell IdentificationXXFENCE911GROUNDWATER ELEVATION CONTOUR(DASHED WHERE INFERRED)GROUNDWATER FLOW DIRECTIONMW-2910.18MONITORING WELLWell IdentificationRelative Groundwater Elevation (ft)912.79912.42910.71905.39905.99907.60910.76909.16912.29908.52912.52912.29911.32911.34911.08912.57910.49910.96910.68913.55913.42913.19NMNMNMNMNMNMNMNMNMNMNMNMNMNMNMNMNMNM91
3
9
1
2
9119
1
0
909908907906Figure:Drawing File:
Project Number:
Ckd. By:
Drn. By:
App'd By:
Ckd. Date:Scale:Date:H:\2022\1 OTHER OFFICES\NORTH CAROLINA\NCDEQ-STATE LEAD\FORMER CONOCO #6578\P666578109-POT.DWG, FIG4
GROUNDWATER ELEVATION CONTOUR MAP07/29/2022SEE LOWER LEFTFORMER CONOCOPHILLIPS TERMINAL NO. 33441 (RM #6578)
115 SOUTH CHIMNEY ROCK ROAD
GREENSBORO, GUILFORD COUNTY, NORTH CAROLINA
P666578109AS SHOWNDH
CL4NOTES:
1.Features shown are not an authoritative location, nor are they presented to a
stated accuracy.
2.NM = Not Measured
3.Groundwater measured on June 16, 2022
4.* = DW-1, MW-8, and MW-12 were not included in the construction of the
groundwater contours.
COORDINATE SYSTEM:
NAD 1983 NORTH CAROLINA STATE PLANE FIPS 3200, US SURVEY FEETSCALE: 1" = 100'1000251005075N
SOUTH CHIMNEY ROCK ROAD
BURNT POPLAR ROADINTE
R
S
T
A
T
E

I
-
7
3 LEGEND:SITE PROPERTY LINENOTE: ALL LOCATIONS ARE APPROXIMATEPARCEL LINELONG BRANCHTANK4XXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXX
X
XXXXXXXX
X
X
X
XX
X
X
XX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
X
X
XXXXXXXXXXXXXXXXXX
TANK3TANK9TANK1TANK2TANK5TANK6TANK7TANK8STORMWATERPONDMW-1DW-1MW-2MW-3MW-4MW-5MW-6MW-15MW-14MW-9MW-7MW-13MW-12MW-8MW-16MW-10MW-11AI-1AI-4AI-2AI-3DW-3DW-5DW-4DPE-3DPE-2DW-2DPE-7DPE-17DPE-12DPE-13DPE-15DPE-23DPE-22DPE-21DPE-20 DPE-19DPE-18DPE-9DPE-11DPE-10DPE-8DPE-6DPE-16DPE-1DPE-14SCALE: 1" = 100'1000251005075NAIR SPARGESYSTEMFUEL OILTANKMW-4DW-1TYPE III MONITORING WELLWell IdentificationABANDONED MONITORING WELLWell IdentificationDPE-15AI-1AIR SPARGE WELLWell IdentificationAIR INJECTION WELLWell IdentificationDPE-6MONITORING WELL / FORMERDUAL-PHASE EXTRATION WELLWell IdentificationXXFENCE100DISSOLVED BENZENE ISOCONCENTRATIONCONTOUR (DASHED WHERE INFERRED) (µg/L)MW-1212.4MONITORING WELLWell IdentificationDissolved Benzene Concentration (µg/L)<1.0162<1.01001Figure:Drawing File:
Project Number:
Ckd. By:
Drn. By:
App'd By:
Ckd. Date:Scale:Date:H:\2022\1 OTHER OFFICES\NORTH CAROLINA\NCDEQ-STATE LEAD\FORMER CONOCO #6578\P666578109-BENZ.DWG, FIG5
DISSOLVED BENZENE
ISOCONCENTRATION CONTOUR07/27/2022SEE LOWER LEFTFORMER CONOCOPHILLIPS TERMINAL NO. 33441 (RM #6578)
115 SOUTH CHIMNEY ROCK ROAD
GREENSBORO, GUILFORD COUNTY, NORTH CAROLINA
P666578109AS SHOWNDH
CL5NOTES:
1.Features shown are not an authoritative location, nor are they
presented to a stated accuracy.
2.Groundwater samples collected on June 16, 2022.
3.Groundwater samples are reported in micrograms per liter (µg/L).
COORDINATE SYSTEM:
NAD 1983 NORTH CAROLINA STATE PLANE FIPS 3200, US SURVEY FEET
SOUTH CHIMNEY ROCK ROAD
BURNT POPLAR ROADINTE
R
S
T
A
T
E

I
-
7
3 LEGEND:SITE PROPERTY LINENOTE: ALL LOCATIONS ARE APPROXIMATEPARCEL LINELONG BRANCHTANK4XXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXX
X
XXXXXXXX
X
X
X
XX
X
X
XX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
X
X
XXXXXXXXXXXXXXXXXX
TANK3TANK9TANK1TANK2TANK5TANK6TANK7TANK8STORMWATERPONDMW-1DW-1MW-2MW-3MW-4MW-5MW-6MW-15MW-14MW-9MW-7MW-13MW-12MW-8MW-16MW-10MW-11AI-1AI-4AI-2AI-3DW-3DW-5DW-4DPE-3DPE-2DW-2DPE-7DPE-17DPE-12DPE-13DPE-15DPE-23DPE-22DPE-21DPE-20DPE-19DPE-18DPE-9DPE-11DPE-10DPE-8DPE-6DPE-16DPE-1DPE-14SCALE: 1" = 100'1000251005075NAIR SPARGESYSTEMFUEL OILTANKMW-4DW-1TYPE III MONITORING WELLWell IdentificationABANDONED MONITORING WELLWell IdentificationDPE-15AI-1AIR SPARGE WELLWell IdentificationAIR INJECTION WELLWell IdentificationDPE-6MONITORING WELL / FORMERDUAL-PHASE EXTRATION WELLWell IdentificationXXFENCE20DISSOLVED MTBE ISOCONCENTRATIONCONTOUR (DASHED WHERE INFERRED) (µg/L)MW-1247.8MONITORING WELLWell IdentificationDissolved MTBE Concentration (µg/L)32.841.9<1.020Figure:Drawing File:
Project Number:
Ckd. By:
Drn. By:
App'd By:
Ckd. Date:Scale:Date:H:\2022\1 OTHER OFFICES\NORTH CAROLINA\NCDEQ-STATE LEAD\FORMER CONOCO #6578\P666578109-MTBE.DWG, FIG6
DISSOLVED MBTE
ISOCONCENTRATION CONTOUR07/27/2022SEE LOWER LEFTFORMER CONOCOPHILLIPS TERMINAL NO. 33441 (RM #6578)
115 SOUTH CHIMNEY ROCK ROAD
GREENSBORO, GUILFORD COUNTY, NORTH CAROLINA
P666578109AS SHOWNDH
CL6NOTES:
1.Features shown are not an authoritative location, nor are they presented to
a stated accuracy.
2.Groundwater samples collected on June 24, 2021.
3.Groundwater samples are reported in micrograms per liter (µg/L).
COORDINATE SYSTEM:
NAD 1983 NORTH CAROLINA STATE PLANE FIPS 3200, US SURVEY FEET

Former ConocoPhillips Terminal No. 33441 (RM #6578)
August 1, 2022

ATC Project No. P666578109 Phillips 66 Company

APPENDIX A

LABORATORY ANALYTICAL RESULTS

07/05/22
Technical Report for
Atlas
RM#6578(ATCPSIX), 115 South Chimney Rock Rd, Greensboro, NC
P666578109
SGS Job Number: LA80034
Sampling Date: 06/16/22
Report to:
ATC Group Services LLC.
2725 East Millbrook Road Suite 121
Raleigh, NC 27604
[e-mail]; [e-mail]
ATTN: Gabe Araos
Total number of pages in report:
Certifications: LDEQ(2048), LDHH(LA150012), AR(14-045-04), AZ(AZ0805), FL(E87657), IL(200082), KY(#31),
NC(487), SC(73004001), NJ(LA007), TX(T104704186-18-16), WV(257)
This report shall not be reproduced, except in its entirety, without the written approval of SGS.
Test results relate only to samples analyzed.
SGS North America Inc. • 500 Ambassador Caffery • Scott, LA 70583 • tel: [phone]
Test results contained within this data package meet the requirements
of the National Environmental Laboratory Accreditation Program
and/or state specific certification programs as applicable.
Client Service contact: Ron Benjamin 337-237-4775
Ron Benjamin
Lab Director
Scott, LA 07/05/22
e-Hardcopy 2.0
Automated Report
16
SGS is the sole authority for authorizing edits or modifications to this document.
Unauthorized modification of this report is strictly prohibited.
Review standard terms at: http://www.sgs.com/en/terms-and-conditions
The results set forth herein are provided by SGS North America Inc.
Please share your ideas about
how we can serve you better at:
[e-mail]
1 of 16
LA80034
Table of Contents
-1-
Sections:
Section 1: Sample Summary ...................................................................................................3
Section 2: Summary of Hits ....................................................................................................4
Section 3: Sample Results ........................................................................................................5
3.1: LA80034-1: MW-11 .....................................................................................................6
3.2: LA80034-2: MW-12 .....................................................................................................7
3.3: LA80034-3: MW-13 .....................................................................................................8
Section 4: Misc. Forms ............................................................................................................9
4.1: Chain of Custody ...........................................................................................................10
Section 5: MS Volatiles - QC Data Summaries .....................................................................13
5.1: Method Blank Summary ................................................................................................14
5.2: Blank Spike/Blank Spike Duplicate Summary ..............................................................15
5.3: Matrix Spike/Matrix Spike Duplicate Summary ...........................................................16 123452 of 16
LA80034
SGS North America Inc.
Sample Summary
Atlas
Job No:LA80034
RM#6578(ATCPSIX), 115 South Chimney Rock Rd, Greensboro, NC
Project No: P666578109
Sample Collected Matrix Client
Number Date Time By Received Code Type Sample ID
This report contains results reported as ND = Not detected. The following applies:
Organics ND = Not detected above the MDL
LA80034-1 06/16/22 12:00 CH 06/21/22 AQ Ground Water MW-11
LA80034-2 06/16/22 12:30 CH 06/21/22 AQ Ground Water MW-12
LA80034-3 06/16/22 11:30 CH 06/21/22 AQ Ground Water MW-13
3 of 16
LA800341
Summary of Hits Page 1 of 1
Job Number:LA80034
Account:Atlas
Project:RM#6578(ATCPSIX), 115 South Chimney Rock Rd, Greensboro, NC
Collected:06/16/22
Lab Sample ID Client Sample ID Result/
Analyte Qual RL MDL Units Method
LA80034-1 MW-11
Methyl Tert Butyl Ether 32.8 1.0 0.21 ug/l SW846 8260B
LA80034-2 MW-12
Benzene 162 1.0 0.23 ug/l SW846 8260B
Toluene 0.36 J 1.0 0.23 ug/l SW846 8260B
Ethylbenzene 21.3 1.0 0.23 ug/l SW846 8260B
Xylene (total)5.9 2.0 0.39 ug/l SW846 8260B
Methyl Tert Butyl Ether 41.9 1.0 0.21 ug/l SW846 8260B
LA80034-3 MW-13
No hits reported in this sample.
4 of 16
LA800342
SGS North America Inc.
Sample Results
Report of Analysis
Scott, LA
Section 3
5 of 16
LA800343
SGS North America Inc.
Report of Analysis Page 1 of 1
Client Sample ID:MW-11
Lab Sample ID:LA80034-1 Date Sampled:06/16/22
Matrix:AQ - Ground Water Date Received:06/21/22
Method:SW846 8260B Percent Solids:n/a
Project:RM#6578(ATCPSIX), 115 South Chimney Rock Rd, Greensboro, NC
File ID DF Analyzed By Prep Date Prep Batch Analytical Batch
Run #1 1E0092632.D 1 06/29/22 02:55 JY n/a n/a V1E4276
Run #2
Purge Volume
Run #1 5.0 ml
Run #2
Purgeable Aromatics, MTBE
CAS No.Compound Result RL MDL Units Q
71-43-2 Benzene ND 1.0 0.23 ug/l
108-88-3 Toluene ND 1.0 0.23 ug/l
100-41-4 Ethylbenzene ND 1.0 0.23 ug/l
1330-20-7 Xylene (total)ND 2.0 0.39 ug/l
1634-04-4 Methyl Tert Butyl Ether 32.8 1.0 0.21 ug/l
CAS No.Surrogate Recoveries Run# 1 Run# 2 Limits
17060-07-0 1,2-Dichloroethane-D4 101%75-130%
2037-26-5 Toluene-D8 101%85-110%
460-00-4 4-Bromofluorobenzene 99%86-115%
ND = Not detected MDL = Method Detection Limit J = Indicates an estimated value
RL = Reporting Limit B = Indicates analyte found in associated method blank
E = Indicates value exceeds calibration range N = Indicates presumptive evidence of a compound
6 of 16
LA8003433.1
SGS North America Inc.
Report of Analysis Page 1 of 1
Client Sample ID:MW-12
Lab Sample ID:LA80034-2 Date Sampled:06/16/22
Matrix:AQ - Ground Water Date Received:06/21/22
Method:SW846 8260B Percent Solids:n/a
Project:RM#6578(ATCPSIX), 115 South Chimney Rock Rd, Greensboro, NC
File ID DF Analyzed By Prep Date Prep Batch Analytical Batch
Run #1 1E0092634.D 1 06/29/22 03:23 JY n/a n/a V1E4276
Run #2
Purge Volume
Run #1 5.0 ml
Run #2
Purgeable Aromatics, MTBE
CAS No.Compound Result RL MDL Units Q
71-43-2 Benzene 162 1.0 0.23 ug/l
108-88-3 Toluene 0.36 1.0 0.23 ug/l J
100-41-4 Ethylbenzene 21.3 1.0 0.23 ug/l
1330-20-7 Xylene (total)5.9 2.0 0.39 ug/l
1634-04-4 Methyl Tert Butyl Ether 41.9 1.0 0.21 ug/l
CAS No.Surrogate Recoveries Run# 1 Run# 2 Limits
17060-07-0 1,2-Dichloroethane-D4 102%75-130%
2037-26-5 Toluene-D8 101%85-110%
460-00-4 4-Bromofluorobenzene 99%86-115%
ND = Not detected MDL = Method Detection Limit J = Indicates an estimated value
RL = Reporting Limit B = Indicates analyte found in associated method blank
E = Indicates value exceeds calibration range N = Indicates presumptive evidence of a compound
7 of 16
LA8003433.2
SGS North America Inc.
Report of Analysis Page 1 of 1
Client Sample ID:MW-13
Lab Sample ID:LA80034-3 Date Sampled:06/16/22
Matrix:AQ - Ground Water Date Received:06/21/22
Method:SW846 8260B Percent Solids:n/a
Project:RM#6578(ATCPSIX), 115 South Chimney Rock Rd, Greensboro, NC
File ID DF Analyzed By Prep Date Prep Batch Analytical Batch
Run #1 1E0092636.D 1 06/29/22 03:52 JY n/a n/a V1E4276
Run #2
Purge Volume
Run #1 5.0 ml
Run #2
Purgeable Aromatics, MTBE
CAS No.Compound Result RL MDL Units Q
71-43-2 Benzene ND 1.0 0.23 ug/l
108-88-3 Toluene ND 1.0 0.23 ug/l
100-41-4 Ethylbenzene ND 1.0 0.23 ug/l
1330-20-7 Xylene (total)ND 2.0 0.39 ug/l
1634-04-4 Methyl Tert Butyl Ether ND 1.0 0.21 ug/l
CAS No.Surrogate Recoveries Run# 1 Run# 2 Limits
17060-07-0 1,2-Dichloroethane-D4 102%75-130%
2037-26-5 Toluene-D8 102%85-110%
460-00-4 4-Bromofluorobenzene 100%86-115%
ND = Not detected MDL = Method Detection Limit J = Indicates an estimated value
RL = Reporting Limit B = Indicates analyte found in associated method blank
E = Indicates value exceeds calibration range N = Indicates presumptive evidence of a compound
8 of 16
LA8003433.3
SGS North America Inc.
Misc. Forms
Custody Documents and Other Forms
Includes the following where applicable:
• Chain of Custody
Scott, LA
Section 4
9 of 16
LA800344
LA80034: Chain of Custody
Page 1 of 3
10 of 16
LA8003444.1
LA80034: Chain of Custody
Page 2 of 3
11 of 16
LA8003444.1
SGS Sample Receipt Summary
Job Number:LA80034 Client:ATC ASSOCIATES
Date / Time Received:6/21/2022 9:30:00 AM Delivery Method:FedEx
Project:RM 6578
4. No. Coolers:1
Airbill #'s:5707 9049 7490
Cooler Security
1. Custody Seals Present:
Y or N
2. Custody Seals Intact:
3. COC Present:
4. Smpl Dates/Time OK
2. Thermometer ID:
Cooler Temperature Y or N
1. Temp criteria achieved:
3. Cooler media:
IR002;
Ice (direct contact)
Quality Control Preservation Y or N N/A
1. Trip Blank present / cooler:
2. Trip Blank listed on COC:
3. Samples preserved properly:
4. VOCs headspace free:
Sample Integrity - Documentation Y or N
1. Sample labels present on bottles:
2. Container labeling complete:
3. Sample container label / COC agree:
Sample Integrity - Condition Y or N
1. Sample recvd within HT:
3. Condition of sample:
2. All containers accounted for:
Sample Integrity - Instructions
1. Analysis requested is clear:
2. Bottles received for unspecified tests
3. Sufficient volume recvd for analysis:
4. Compositing instructions clear:
5. Filtering instructions clear:
Intact
Y or N
Comments
Y or N N/A
Cooler Temps (Initial/Adjusted):#1: (1.2/1);
LA80034: Chain of Custody
Page 3 of 3
12 of 16
LA8003444.1
SGS North America Inc.
MS Volatiles
QC Data Summaries
Includes the following where applicable:
• Method Blank Summaries
• Blank Spike Summaries
• Matrix Spike and Duplicate Summaries
Scott, LA
Section 5
13 of 16
LA800345
Method Blank Summary Page 1 of 1
Job Number:LA80034
Account:ATCNCR Atlas
Project:RM#6578(ATCPSIX), 115 South Chimney Rock Rd, Greensboro, NC
Sample File ID DF Analyzed By Prep Date Prep Batch Analytical Batch
V1E4276-MB1 1E0092616.D 1 06/28/22 JY n/a n/a V1E4276
The QC reported here applies to the following samples:Method: SW846 8260B
LA80034-1, LA80034-2, LA80034-3
CAS No.Compound Result RL MDL Units Q
71-43-2 Benzene ND 1.0 0.23 ug/l
100-41-4 Ethylbenzene ND 1.0 0.23 ug/l
1634-04-4 Methyl Tert Butyl Ether ND 1.0 0.21 ug/l
108-88-3 Toluene ND 1.0 0.23 ug/l
1330-20-7 Xylene (total)ND 2.0 0.39 ug/l
CAS No.Surrogate Recoveries Limits
17060-07-0 1,2-Dichloroethane-D4 92%75-130%
2037-26-5 Toluene-D8 102%85-110%
460-00-4 4-Bromofluorobenzene 97%86-115%
14 of 16
LA8003455.1.1
Blank Spike/Blank Spike Duplicate Summary Page 1 of 1
Job Number:LA80034
Account:ATCNCR Atlas
Project:RM#6578(ATCPSIX), 115 South Chimney Rock Rd, Greensboro, NC
Sample File ID DF Analyzed By Prep Date Prep Batch Analytical Batch
V1E4276-BS1 1E0092612.D 1 06/28/22 JY n/a n/a V1E4276
V1E4276-BSD1 1E0092614.D 1 06/28/22 JY n/a n/a V1E4276
The QC reported here applies to the following samples:Method: SW846 8260B
LA80034-1, LA80034-2, LA80034-3
Spike BSP BSP BSD BSD Limits
CAS No.Compound ug/l ug/l %ug/l %RPD Rec/RPD
71-43-2 Benzene 20 19.2 96 19.3 97 1 79-125/14
100-41-4 Ethylbenzene 20 19.4 97 19.9 100 3 78-126/15
1634-04-4 Methyl Tert Butyl Ether 20 19.8 99 20.0 100 1 71-132/15
108-88-3 Toluene 20 19.2 96 19.4 97 1 77-120/15
1330-20-7 Xylene (total)60 58.6 98 60.0 100 2 79-124/15
CAS No.Surrogate Recoveries BSP BSD Limits
17060-07-0 1,2-Dichloroethane-D4 95%93%75-130%
2037-26-5 Toluene-D8 99%99%85-110%
460-00-4 4-Bromofluorobenzene 100%99%86-115%
* = Outside of Control Limits.
15 of 16
LA8003455.2.1
Matrix Spike/Matrix Spike Duplicate Summary Page 1 of 1
Job Number:LA80034
Account:ATCNCR Atlas
Project:RM#6578(ATCPSIX), 115 South Chimney Rock Rd, Greensboro, NC
Sample File ID DF Analyzed By Prep Date Prep Batch Analytical Batch
LA79961-17MS 1E0092652.D 200 06/29/22 JY n/a n/a V1E4276
LA79961-17MSD 1E0092654.D 200 06/29/22 JY n/a n/a V1E4276
LA79961-17 a 1E0092650.D 1 06/29/22 JY n/a n/a V1E4276
The QC reported here applies to the following samples:Method: SW846 8260B
LA80034-1, LA80034-2, LA80034-3
LA79961-17 Spike MS MS Spike MSD MSD Limits
CAS No.Compound ug/l Q ug/l ug/l %ug/l ug/l %RPD Rec/RPD
71-43-2 Benzene 1.3 4000 4240 106 4000 4120 103 3 55-148/22
100-41-4 Ethylbenzene ND 4000 4050 101 4000 4050 101 0 58-145/22
1634-04-4 Methyl Tert Butyl Ether ND 4000 4060 102 4000 4010 100 1 59-145/26
108-88-3 Toluene 0.85 4000 4130 103 4000 4060 101 2 58-138/23
1330-20-7 Xylene (total)ND 12000 12200 102 12000 12100 101 1 61-141/23
CAS No.Surrogate Recoveries MS MSD LA79961-17 Limits
17060-07-0 1,2-Dichloroethane-D4 92%91%94%75-130%
2037-26-5 Toluene-D8 98%98%101%85-110%
460-00-4 4-Bromofluorobenzene 98%98%98%86-115%
(a) rr f/d, pco 5x Sample used for QC purposes only.
* = Outside of Control Limits.
16 of 16
LA8003455.3.1

Former ConocoPhillips Terminal No. 33441 (RM #6578)
August 1, 2022

ATC Project No. P666578109 Phillips 66 Company

APPENDIX B

CONCENTRATION VERSUS TIME GRAPHS

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890.00
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0
200
400
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800
1000
1200
1400
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Concentration (µg/L)Date
MW-11
Concentration vs. Time Graph / Groundwater Elevation vs. Time Graph
MTBE Groundwater Elevation
GroundwaterElevation (feet)
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895.00
900.00
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0.00
100.00
200.00
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500.00
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Concentration (µg/L)Date
MW-12
Concentration vs. Time Graph / Groundwater Elevation vs. Time Graph
Benzene MTBE Groundwater Elevation
GroundwaterElevation (feet)ORS SOCK
INSTALLATION
Page 1 of 1
890.00
895.00
900.00
905.00
910.00
915.00
920.00
0.00
200.00
400.00
600.00
800.00
1000.00
Concentration (µg/L)Date
MW-13
Concentration vs. Time Graph / Groundwater Elevation vs. Time Graph
Benzene MTBE Groundwater Elevation
GroundwaterElevation (feet)