WS-7706_7706_CA_RMR_20200812

TABLE OF CONTENTS

1.0 INTRODUCTION..................................................................................................................1
2.0 SITE BACKGROUND ..........................................................................................................1
3.0 GROUNDWATER INVESTIGATION ...............................................................................5
3.1 Groundwater Elevations ...................................................................................................5
3.2 Groundwater Analytical Results ......................................................................................5
4.0 CONCLUSIONS ....................................................................................................................7

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 Parameter Data

FIGURES

Figure 1 Site Topographic Map
Figure 2 Site Map
Figure 3 Potential Receptor Map
Figure 4 Groundwater Elevation Contour Map
Figure 5 Dissolved Benzene Isoconcentration Contour Map
Figure 6 Dissolved MTBE Isoconcentration Contour Map

APPENDICES

Appendix A Laboratory Analytical Results
Appendix B Concentration vs. Time and Groundwater Elevation vs. Time Graphs

Active Remediation Monitoring Report August 12, 2020
Former ConocoPhillips Terminal No. 33441 (RM #6578) ATC Project No. P666578845

Page 1

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 2020.

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 is currently owned and operated by Magellan
Terminals Holdings, L.P. (Magellan). 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.

Active Remediation Monitoring Report August 12, 2020
Former ConocoPhillips Terminal No. 33441 (RM #6578) ATC Project No. P666578845

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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.

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 Oxygen Release Compound (ORC®) filter
Active Remediation Monitoring Report August 12, 2020
Former ConocoPhillips Terminal No. 33441 (RM #6578) ATC Project No. P666578845

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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.

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 which 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.

Active Remediation Monitoring Report August 12, 2020
Former ConocoPhillips Terminal No. 33441 (RM #6578) ATC Project No. P666578845

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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.

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.

Active Remediation Monitoring Report August 12, 2020
Former ConocoPhillips Terminal No. 33441 (RM #6578) ATC Project No. P666578845

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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.

This report documents groundwater sampling events performed in March and June 2020.

3.0 GROUNDWATER INVESTIGATION

3.1 Groundwater Elevations
On March 4, 2020, ATC measured groundwater elevations in wells MW-1, MW-2, MW-3, MW-5,
MW-6, MW-8, MW-9, MW-10, MW-11, MW-12, MW-13, DW-1, DPE-7, DPE-10, DPE-11,
DPE-14, DPE-18, DPE-19, DPE-20, and DPE-22. On June 3, 2020, 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-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 2020 gauging
event, groundwater depths ranged from 0.97 feet bgs in MW-2 to 11.21 feet bgs in MW-11.
LNAPL was not detected during either sampling event.

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 2020 sampling event is included as Figure 4.
Based on the water table elevations, groundwater flow is towards the southeast.

3.2 Groundwater Analytical Results
On March 4, 2020 and June 3, 2020, ATC collected groundwater samples from monitoring wells
MW-11, MW-12, and MW-13. Groundwater samples were collected into laboratory-approved
Active Remediation Monitoring Report August 12, 2020
Former ConocoPhillips Terminal No. 33441 (RM #6578) ATC Project No. P666578845

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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, dissolved oxygen, pH,
conductivity, turbidity, and oxygen releasing potential were measured in the monitoring wells.
The ORC socks were re-installed into MW-12 at the completion of the sampling activities.

Laboratory analytical results from the March 2020 sampling event indicated MTBE (42.6 µg/L)
above 2L Standards in MW-11. Benzene (75.5 µg/L) and MTBE (69.4 µg/L) were detected above
2L Standards in MW-12.

Laboratory analytical results from the June 2020 sampling event indicated MTBE (44.8 µg/L)
above 2L Standards in MW-11. Benzene (87.8 µg/L) and MTBE (65.8 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 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
2020 sampling events. MTBE did not exceeded the 2B Standards by a factor of 10 during the
March and June 2020 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.

Active Remediation Monitoring Report August 12, 2020
Former ConocoPhillips Terminal No. 33441 (RM #6578) ATC Project No. P666578845

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4.0 CONCLUSIONS

Two quarterly groundwater sampling events were performed in March and June 2020 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 100 times the applicable 2B Surface Water
Standards;
 Depth to groundwater measurements ranged from 0.97 feet bgs in MW-2 to 11.21
feet bgs in MW-11 (June 2020). 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; and
 Benzene exceeded by a factor of 10 the applicable 2B Standards in MW-12 during
the March and June 2020 sampling events.

Based on the receptor survey conducted in June 2016, the site is classified as an Intermediate risk.
As a result, in order 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 event in
September and December 2020.

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 6.95 --918.35
MW-2 2/14/1990 2 5-20 20.0 915.16 0.97 914.19
MW-3 2/14/1990 2 5-20 20.0 915.26 5.64 --909.62
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 4.32 --907.93
MW-6 2/13/1990 2 8.5-23.5 25.0 921.74 11.05 --910.69
MW-7 2/13/1990 2 7-22 25.0 924.77 7.52 --917.25
MW-8 2/12/1990 2 8.5-23.5 25.0 926.09 9.33 --916.76
MW-9 7/31/1990 2 4.7-19.7 20.0 924.93 8.17 --916.76
MW-10 8/2/1990 2 5-20 20.0 923.42 9.18 --914.24
MW-11 8/2/1990 2 4.3-19.3 20.0 922.60 11.21 --911.39
MW-12 8/2/1990 2 4.5-19.5 20.0 923.90 8.91 --914.99
MW-13 8/3/1990 2 4.5-19.5 20.0 925.63 7.88 --917.75
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 8.24 --917.03
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
DPE-7 Unknown Unknown Unknown Unknown 920.98 4.53 --916.45
DPE-8 Unknown Unknown Unknown Unknown 920.93
DPE-9 Unknown Unknown Unknown Unknown 920.81
DPE-10 Unknown Unknown Unknown Unknown 920.33 3.48 --916.85
DPE-11 Unknown Unknown Unknown Unknown 920.39 4.48 --915.91
DPE-12 Unknown Unknown Unknown Unknown 921.33
DPE-13 Unknown Unknown Unknown Unknown 920.91
DPE-14 Unknown Unknown Unknown Unknown 919.98 5.88 --914.10
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 5.00 --918.71
DPE-19 Unknown Unknown Unknown Unknown 924.13 5.23 --918.90
DPE-20 Unknown Unknown Unknown Unknown 924.07 5.12 --918.95
DPE-21 Unknown Unknown Unknown Unknown 922.89
DPE-22 Unknown Unknown Unknown Unknown 921.76 4.68 --917.08
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: 6/03/2020
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
Destroyed
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
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
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
Note:
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
MW-1
MW-2
Well Not Measured
Page 1 of 13
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
MW-4 04/28/09 910.89
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
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
MW-3
MW-5
Well Destroyed
Page 2 of 13
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
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
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
Not Measured
MW-7
MW-6
Page 3 of 13
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
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
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
MW-8
MW-9
Page 4 of 13
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
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
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
MW-10
MW-11
Page 5 of 13
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
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
MW-12
Page 6 of 13
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
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
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
MW-14
MW-15
MW-13
Abandoned
Page 7 of 13
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)
04/28/09 925.27 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
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
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
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
DW-2
DW-3
DPE-1
Unable to Locate
Unable to Locate
Unable to Locate
DW-1
DPE-6
Unable to Locate
Unable to Locate
Unable to Locate
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
Sparge Well - No Longer Measured
Sparge well - no longer measured
Page 8 of 13
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
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
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
12/05/17
12/18/18
03/13/19
06/12/19
03/04/20
06/03/20
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
Unable to Locate
DPE-7
Well Not Located
Well under water
DPE-8
DPE-9
Well Not Located
Well Not Located
Well Not Located
Well Not Located
Well Not Located
Well Not Located
Page 9 of 13
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
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
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
DPE-10
DPE-11
Page 10 of 13
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)
DPE-12 06/28/04 921.33
DPE-13 06/28/04 920.91
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
DPE-15 06/28/04 920.41
DPE-16 12/02/97 923.03 13.18 0.00 909.85
DPE-17 04/28/09 922.77 8.00 0.00 914.77
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
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
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
DPE-14
DPE-18
Sparge well - no longer measured
Sparge well - no longer measured
Sparge well - no longer measured
Well under water
Page 11 of 13
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
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
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.
DPE-19
DPE-20
Equipment obstruction of well
Unable to Locate
Unable to Locate
Page 12 of 13
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)
LNAPL - Light Non-Aqueous Phase Liquid
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
03/04/04 921.57 7.40 0.00 914.36
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
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
DPE-21
DPE-22
Sparge well - no longer measured
Page 13 of 13
TABLE 3
GROUNDWATER ANALYTICAL DATA
FORMER CONOCOPHILLIPS TERMINAL NO. 33441 (RM 6578)
115 SOUTH CHIMNEY ROCK ROAD
GREENSBORO, NORTH CAROLINA
INCIDENT NO. 7706
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
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
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
1 600 600 500 20
1.19 11 68 670 19
5,000 260,000 84,500 85,500 20,000
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. 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.
Total Xylenes MTBEWELL I.D.SAMPLE
DATE Benzene Toluene Ethylbenzene
MW-11
2L Standards
GCLs
2B Standards
MW-13
MW-12
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
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
1 600 600 500 20
5,000 260,000 84,500 85,500 20,000
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.
MW-6
MW-1
MW-2
MW-3
MW-4
MW-5
2L Standards
GCLs
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
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
1 600 600 500 20
5,000 260,000 84,500 85,500 20,000
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.
MW-7
MW-8
MW-9
2L Standards
GCLs
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
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
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
1 600 600 500 20
5,000 260,000 84,500 85,500 20,000
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.
MW-11
MW-10
2L Standards
GCLs
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
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
06/04/03 280 <5.0 <5.0 7 20
12/10/03 100 <1.0 <1.0 <2.0 25
03/04/04 78 <1.0 1.5 <2.0 31
06/29/04 28 <1.0 <1.0 <2.0 30
09/21/04 79 <1.0 <1.0 2.2 32
11/11/04 4.7 <1.0 <1.0 <2.0 19
03/15/05 10 <1.0 <1.0 <2.0 24
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
10/16/07 1.1 <1.0 <1.0 <3.0 33
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
1 600 600 500 20
5,000 260,000 84,500 85,500 20,000
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.
MW-12
2L Standards
GCLs
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
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
09/10/97 980 <25 <25 49 160
12/03/97 390 <10 <10 30 120
03/03/98 540 <10 <10 35 150
06/12/98 530 <10 <10 27 270
09/17/98 730 <10 <10 49 150
12/11/98 1,000 <50 <50 34 *150
04/26/99 560 <20 <20 38 290
06/25/99 680 <20 <20 40 310
09/21/99 670 <10 14 27 290
12/29/99 280 <10 <10 <10 170
03/21/00 220 <5.0 <5.0 12 93
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
1 600 600 500 20
5,000 260,000 84,500 85,500 20,000
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.
MW-13
2L Standards
GCLs
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
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
1 600 600 500 20
5,000 260,000 84,500 85,500 20,000
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.
MW-14
MW-14
2L Standards
GCLs
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
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
1 600 600 500 20
5,000 260,000 84,500 85,500 20,000
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.
2L Standards
GCLs
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
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-2 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-2 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-2 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-2 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-2 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
1 600 600 500 20
5,000 260,000 84,500 85,500 20,000
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-2
2L Standards
GCLs
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
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
1 600 600 500 20
5,000 260,000 84,500 85,500 20,000
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
2L Standards
GCLs
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
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
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
MW-11
MW-12
Page 1 of 5
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
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
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
MW-13
DPE-11
Page 3 of 5
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
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
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
Notes:
1. DO - Dissolved oxygen
2. ORP - Oxygen reduction potential
3. mg/L - Milligrams per liter
DPE-22
DPE-14
DPE-20
Page 4 of 5

FIGURES

2725 E. Millbrook Road, Ste 121
Raleigh, NC 27604
[phone]
PROJECT NO: P666578701
DATE: 7/2019 REVIEWED BY: GA
Former ConocoPhillips Terminal No. 33441
(RM #6578)
115 S. Chimney Rock Road
Greensboro, Guilford County, North Carolina
SOURCE: MyTopoMap.com
SCALE: 1” = 1,500’
FIGURE 1: SITE TOPOGRAPHIC MAP
SITE
N
STORMWATERPONDGASSAGASWOPEN DITCHUGETANKBURNT POPLAR ROADPOLEUTILITYT7TANK 6TANK 1TANK 2TANK 5SACULVERTPIPESCATCHBASINTANK 8CHIMNEY ROCK ROADWWTOP OFOFFICEPUMPSTANK TRUCKOILFUELRACKLOADINGTANK 4TANK 3SHEDWAREHOUSETANK 9DIKEAIRSPARGETANKWATERTSATANKSLOPRECEIVERSEPARATORTANKOILSYSTEMAIR SPARGEMANIFOLDAPPROXIMATE LOCATIONOF LONG BRANCHUGETSAWGASCAD FILE PREP. BYTYPE CODE REV. BY SCALE PROJECT NO.
TITLE
DATE
NOTES:
GEOTECHNICALENVIRONMENTAL
MATERIALS TESTINGBUILDING SCIENCES2725 E. Millbrook Road, Suite 121
[phone] FAX [phone]
Raleigh, North Carolina 27604
2725 E. Millbrook Road, Ste 121
Raleigh, NC 27604
[phone]
PROJECT NO: P666578701
DATE: 7/2019 REVIEWED BY: GA
Former ConocoPhillips Terminal No. 33441
(RM #6578)
115 S. Chimney Rock Road
Greensboro, Guilford County, North CarolinaSCALE: 1” = 500’
FIGURE 3: POTENTIAL RECEPTOR MAP
Source: Guilford County NC GIS
SITE
N
Note: No water supply wells were identified within 1,000 feet of the site.
On-Site
Retention Pond
Approximate
Location of Long
Branch
STORMWATERPONDGASSAGASWOPEN DITCHUGETANKBURNT POPLAR ROADPOLEUTILITYT7TANK 6TANK 1TANK 2TANK 5SACULVERTPIPESCATCHBASINTANK 8CHIMNEY ROCK ROADWWTOP OFOFFICEPUMPSTANK TRUCKOILFUELRACKLOADINGTANK 4TANK 3SHEDWAREHOUSETANK 9DIKEAIRSPARGETANKWATERTSATANKSLOPRECEIVERSEPARATORTANKOILSYSTEMAIR SPARGEMANIFOLDAPPROXIMATE LOCATIONOF LONG BRANCHUGETSAWGASCAD FILE PREP. BYTYPE CODE REV. BY SCALE PROJECT NO.
TITLE
DATE
NOTES:
GEOTECHNICALENVIRONMENTAL
MATERIALS TESTINGBUILDING SCIENCES2725 E. Millbrook Road, Suite 121
[phone] FAX [phone]
Raleigh, North Carolina 27604
STORMWATERPONDGASSAGASWOPEN DITCHUGETANKBURNT POPLAR ROADPOLEUTILITYT7TANK 6TANK 1TANK 2TANK 5SACULVERTPIPESCATCHBASINTANK 8CHIMNEY ROCK ROADWWTOP OFOFFICEPUMPSTANK TRUCKOILFUELRACKLOADINGTANK 4TANK 3SHEDWAREHOUSETANK 9DIKEAIRSPARGETANKWATERTSATANKSLOPRECEIVERSEPARATORTANKOILSYSTEMAIR SPARGEMANIFOLDAPPROXIMATE LOCATIONOF LONG BRANCHUGETSAWGASCAD FILE PREP. BYTYPE CODE REV. BY SCALE PROJECT NO.
TITLE
DATE
NOTES:
GEOTECHNICALENVIRONMENTAL
MATERIALS TESTINGBUILDING SCIENCES2725 E. Millbrook Road, Suite 121
[phone] FAX [phone]
Raleigh, North Carolina 27604
STORMWATERPONDGASSAGASWOPEN DITCHUGETANKBURNT POPLAR ROADPOLEUTILITYT7TANK 6TANK 1TANK 2TANK 5SACULVERTPIPESCATCHBASINTANK 8CHIMNEY ROCK ROADWWTOP OFOFFICEPUMPSTANK TRUCKOILFUELRACKLOADINGTANK 4TANK 3SHEDWAREHOUSETANK 9DIKEAIRSPARGETANKWATERTSATANKSLOPRECEIVERSEPARATORTANKOILSYSTEMAIR SPARGEMANIFOLDAPPROXIMATE LOCATIONOF LONG BRANCHUGETSAWGASCAD FILE PREP. BYTYPE CODE REV. BY SCALE PROJECT NO.
TITLE
DATE
NOTES:
GEOTECHNICALENVIRONMENTAL
MATERIALS TESTINGBUILDING SCIENCES2725 E. Millbrook Road, Suite 121
[phone] FAX [phone]
Raleigh, North Carolina 27604

APPENDIX A
LABORATORY ANALYTICAL RESULTS

03/10/20
Technical Report for
ATC Group Services LLC
RM#6578(ATCPSIX), 115 South Chimney Rock Rd, Greensboro, NC
P666578845
SGS Job Number: LA62153
Sampling Date: 03/04/20
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: Amy Jackson 337-237-4775
Ron Benjamin
Lab Director
Scott, LA 03/10/20
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
LA62153
Table of Contents
-1-
Sections:
Section 1: Sample Summary ...................................................................................................3
Section 2: Summary of Hits ....................................................................................................4
Section 3: Sample Results ........................................................................................................5
3.1: LA62153-1: MW-11 .....................................................................................................6
3.2: LA62153-2: MW-12 .....................................................................................................7
3.3: LA62153-3: 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
LA62153
SGS North America Inc.
Sample Summary
ATC Group Services LLC
Job No:LA62153
RM#6578(ATCPSIX), 115 South Chimney Rock Rd, Greensboro, NC
Project No: P666578845
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 RL
LA62153-1 03/04/20 13:40 TJ 03/06/20 AQ Ground Water MW-11
LA62153-2 03/04/20 14:40 TJ 03/06/20 AQ Ground Water MW-12
LA62153-3 03/04/20 15:30 TJ 03/06/20 AQ Ground Water MW-13
3 of 16
LA621531
Summary of Hits Page 1 of 1
Job Number:LA62153
Account:ATC Group Services LLC
Project:RM#6578(ATCPSIX), 115 South Chimney Rock Rd, Greensboro, NC
Collected:03/04/20
Lab Sample ID Client Sample ID Result/
Analyte Qual RL MDL Units Method
LA62153-1 MW-11
Methyl Tert Butyl Ether 42.6 1.0 ug/l SW846 8260B
LA62153-2 MW-12
Benzene 75.5 1.0 ug/l SW846 8260B
Methyl Tert Butyl Ether 69.4 1.0 ug/l SW846 8260B
LA62153-3 MW-13
No hits reported in this sample.
4 of 16
LA621532
SGS North America Inc.
Sample Results
Report of Analysis
Scott, LA
Section 3
5 of 16
LA621533
SGS North America Inc.
Report of Analysis Page 1 of 1
Client Sample ID:MW-11
Lab Sample ID:LA62153-1 Date Sampled:03/04/20
Matrix:AQ - Ground Water Date Received:03/06/20
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 1X0100307.D 1 03/07/20 08:23 CP n/a n/a V1X4124
Run #2
Purge Volume
Run #1 5.0 ml
Run #2
Purgeable Aromatics, MTBE
CAS No.Compound Result RL Units Q
71-43-2 Benzene ND 1.0 ug/l
108-88-3 Toluene ND 1.0 ug/l
100-41-4 Ethylbenzene ND 1.0 ug/l
1330-20-7 Xylene (total)ND 2.0 ug/l
1634-04-4 Methyl Tert Butyl Ether 42.6 1.0 ug/l
CAS No.Surrogate Recoveries Run# 1 Run# 2 Limits
17060-07-0 1,2-Dichloroethane-D4 99%81-120%
2037-26-5 Toluene-D8 101%93-105%
460-00-4 4-Bromofluorobenzene 102%89-107%
ND = Not detected 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
LA6215333.1
SGS North America Inc.
Report of Analysis Page 1 of 1
Client Sample ID:MW-12
Lab Sample ID:LA62153-2 Date Sampled:03/04/20
Matrix:AQ - Ground Water Date Received:03/06/20
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 1X0100308.D 1 03/07/20 08:47 CP n/a n/a V1X4124
Run #2
Purge Volume
Run #1 5.0 ml
Run #2
Purgeable Aromatics, MTBE
CAS No.Compound Result RL Units Q
71-43-2 Benzene 75.5 1.0 ug/l
108-88-3 Toluene ND 1.0 ug/l
100-41-4 Ethylbenzene ND 1.0 ug/l
1330-20-7 Xylene (total)ND 2.0 ug/l
1634-04-4 Methyl Tert Butyl Ether 69.4 1.0 ug/l
CAS No.Surrogate Recoveries Run# 1 Run# 2 Limits
17060-07-0 1,2-Dichloroethane-D4 101%81-120%
2037-26-5 Toluene-D8 101%93-105%
460-00-4 4-Bromofluorobenzene 99%89-107%
ND = Not detected 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
LA6215333.2
SGS North America Inc.
Report of Analysis Page 1 of 1
Client Sample ID:MW-13
Lab Sample ID:LA62153-3 Date Sampled:03/04/20
Matrix:AQ - Ground Water Date Received:03/06/20
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 1X0100309.D 1 03/07/20 09:11 CP n/a n/a V1X4124
Run #2
Purge Volume
Run #1 5.0 ml
Run #2
Purgeable Aromatics, MTBE
CAS No.Compound Result RL Units Q
71-43-2 Benzene ND 1.0 ug/l
108-88-3 Toluene ND 1.0 ug/l
100-41-4 Ethylbenzene ND 1.0 ug/l
1330-20-7 Xylene (total)ND 2.0 ug/l
1634-04-4 Methyl Tert Butyl Ether ND 1.0 ug/l
CAS No.Surrogate Recoveries Run# 1 Run# 2 Limits
17060-07-0 1,2-Dichloroethane-D4 96%81-120%
2037-26-5 Toluene-D8 101%93-105%
460-00-4 4-Bromofluorobenzene 99%89-107%
ND = Not detected 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
LA6215333.3
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
LA621534
LA62153: Chain of Custody
Page 1 of 3
10 of 16
LA6215344.1
LA62153: Chain of Custody
Page 2 of 3
11 of 16
LA6215344.1
SGS Sample Receipt Summary
Job Number:LA62153 Client:ATC
Date / Time Received:3/6/2020 8:50:00 AM Delivery Method:FedEx
Project:RM 6578
4. No. Coolers:1
Airbill #'s:4913 8691 2898
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:
DV439;
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: (1.3/1.3); DV439
LA62153: Chain of Custody
Page 3 of 3
12 of 16
LA6215344.1
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
LA621535
Method Blank Summary Page 1 of 1
Job Number:LA62153
Account:ATCNCR ATC Group Services LLC
Project:RM#6578(ATCPSIX), 115 South Chimney Rock Rd, Greensboro, NC
Sample File ID DF Analyzed By Prep Date Prep Batch Analytical Batch
V1X4124-MB4 1X0100286.D 1 03/07/20 CP n/a n/a V1X4124
The QC reported here applies to the following samples:Method: SW846 8260B
LA62153-1, LA62153-2, LA62153-3
CAS No.Compound Result RL Units Q
71-43-2 Benzene ND 1.0 ug/l
100-41-4 Ethylbenzene ND 1.0 ug/l
1634-04-4 Methyl Tert Butyl Ether ND 1.0 ug/l
108-88-3 Toluene ND 1.0 ug/l
1330-20-7 Xylene (total)ND 2.0 ug/l
CAS No.Surrogate Recoveries Limits
17060-07-0 1,2-Dichloroethane-D4 98%81-120%
2037-26-5 Toluene-D8 100%93-105%
460-00-4 4-Bromofluorobenzene 100%89-107%
14 of 16
LA6215355.1.1
Blank Spike/Blank Spike Duplicate Summary Page 1 of 1
Job Number:LA62153
Account:ATCNCR ATC Group Services LLC
Project:RM#6578(ATCPSIX), 115 South Chimney Rock Rd, Greensboro, NC
Sample File ID DF Analyzed By Prep Date Prep Batch Analytical Batch
V1X4124-BS2 1X0100283.D 1 03/06/20 CP n/a n/a V1X4124
V1X4124-BSD2 1X0100284.D 1 03/06/20 CP n/a n/a V1X4124
The QC reported here applies to the following samples:Method: SW846 8260B
LA62153-1, LA62153-2, LA62153-3
Spike BSP BSP BSD BSD Limits
CAS No.Compound ug/l ug/l %ug/l %RPD Rec/RPD
71-43-2 Benzene 20 21.6 108 20.9 105 3 82-119/11
100-41-4 Ethylbenzene 20 20.7 104 19.6 98 5 82-120/11
1634-04-4 Methyl Tert Butyl Ether 20 21.0 105 20.0 100 5 73-124/14
108-88-3 Toluene 20 20.0 100 18.8 94 6 82-118/12
1330-20-7 Xylene (total)60 61.2 102 58.7 98 4 82-122/11
CAS No.Surrogate Recoveries BSP BSD Limits
17060-07-0 1,2-Dichloroethane-D4 101%98%81-120%
2037-26-5 Toluene-D8 102%101%93-105%
460-00-4 4-Bromofluorobenzene 102%100%89-107%
* = Outside of Control Limits.
15 of 16
LA6215355.2.1
Matrix Spike/Matrix Spike Duplicate Summary Page 1 of 1
Job Number:LA62153
Account:ATCNCR ATC Group Services LLC
Project:RM#6578(ATCPSIX), 115 South Chimney Rock Rd, Greensboro, NC
Sample File ID DF Analyzed By Prep Date Prep Batch Analytical Batch
LA62153-2MS 1X0100333.D 5 03/09/20 CP n/a n/a V1X4124
LA62153-2MSD 1X0100334.D 5 03/09/20 CP n/a n/a V1X4124
LA62153-2 1X0100308.D 1 03/07/20 CP n/a n/a V1X4124
The QC reported here applies to the following samples:Method: SW846 8260B
LA62153-1, LA62153-2, LA62153-3
LA62153-2 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 75.5 100 155 80 100 160 85 3 41-155/14
100-41-4 Ethylbenzene 0.29 100 108 108 100 112 112 4 50-147/15
1634-04-4 Methyl Tert Butyl Ether 69.4 100 131 62 100 136 67 4 48-143/15
108-88-3 Toluene 0.66 100 105 104 100 108 107 3 40-153/15
1330-20-7 Xylene (total)0.82 300 333 111 300 341 113 2 46-154/15
CAS No.Surrogate Recoveries MS MSD LA62153-2 Limits
17060-07-0 1,2-Dichloroethane-D4 93%92%101%81-120%
2037-26-5 Toluene-D8 98%99%101%93-105%
460-00-4 4-Bromofluorobenzene 96%98%99%89-107%
* = Outside of Control Limits.
16 of 16
LA6215355.3.1
06/09/20
Technical Report for
ATC Group Services LLC
RM#6578(ATCPSIX), 115 South Chimney Rock Rd, Greensboro, NC
P666578845
SGS Job Number: LA64356
Sampling Date: 06/03/20
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: Amy Jackson 337-237-4775
Ron Benjamin
Lab Director
Scott, LA 06/09/20
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
LA64356
Table of Contents
-1-
Sections:
Section 1: Sample Summary ...................................................................................................3
Section 2: Summary of Hits ....................................................................................................4
Section 3: Sample Results ........................................................................................................5
3.1: LA64356-1: MW11 ......................................................................................................6
3.2: LA64356-2: MW12 ......................................................................................................7
3.3: LA64356-3: MW13 ......................................................................................................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
LA64356
SGS North America Inc.
Sample Summary
ATC Group Services LLC
Job No:LA64356
RM#6578(ATCPSIX), 115 South Chimney Rock Rd, Greensboro, NC
Project No: P666578845
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 RL
LA64356-1 06/03/20 14:20 TJ 06/05/20 AQ Ground Water MW11
LA64356-2 06/03/20 15:05 TJ 06/05/20 AQ Ground Water MW12
LA64356-3 06/03/20 13:40 TJ 06/05/20 AQ Ground Water MW13
3 of 16
LA643561
Summary of Hits Page 1 of 1
Job Number:LA64356
Account:ATC Group Services LLC
Project:RM#6578(ATCPSIX), 115 South Chimney Rock Rd, Greensboro, NC
Collected:06/03/20
Lab Sample ID Client Sample ID Result/
Analyte Qual RL MDL Units Method
LA64356-1 MW11
Methyl Tert Butyl Ether 44.8 1.0 ug/l SW846 8260D
LA64356-2 MW12
Benzene 87.8 1.0 ug/l SW846 8260D
Ethylbenzene 3.4 1.0 ug/l SW846 8260D
Xylene (total)2.3 2.0 ug/l SW846 8260D
Methyl Tert Butyl Ether 65.8 1.0 ug/l SW846 8260D
LA64356-3 MW13
No hits reported in this sample.
4 of 16
LA643562
SGS North America Inc.
Sample Results
Report of Analysis
Scott, LA
Section 3
5 of 16
LA643563
SGS North America Inc.
Report of Analysis Page 1 of 1
Client Sample ID:MW11
Lab Sample ID:LA64356-1 Date Sampled:06/03/20
Matrix:AQ - Ground Water Date Received:06/05/20
Method:SW846 8260D 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 1I076191.D 1 06/09/20 02:40 CP n/a n/a V1I2664
Run #2
Purge Volume
Run #1 5.0 ml
Run #2
Purgeable Aromatics, MTBE
CAS No.Compound Result RL Units Q
71-43-2 Benzene ND 1.0 ug/l
108-88-3 Toluene ND 1.0 ug/l
100-41-4 Ethylbenzene ND 1.0 ug/l
1330-20-7 Xylene (total)ND 2.0 ug/l
1634-04-4 Methyl Tert Butyl Ether 44.8 1.0 ug/l
CAS No.Surrogate Recoveries Run# 1 Run# 2 Limits
17060-07-0 1,2-Dichloroethane-D4 120%81-120%
2037-26-5 Toluene-D8 90%93-105%
460-00-4 4-Bromofluorobenzene 89%89-107%
ND = Not detected 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
LA6435633.1
SGS North America Inc.
Report of Analysis Page 1 of 1
Client Sample ID:MW12
Lab Sample ID:LA64356-2 Date Sampled:06/03/20
Matrix:AQ - Ground Water Date Received:06/05/20
Method:SW846 8260D 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 1I076192.D 1 06/09/20 03:04 CP n/a n/a V1I2664
Run #2
Purge Volume
Run #1 5.0 ml
Run #2
Purgeable Aromatics, MTBE
CAS No.Compound Result RL Units Q
71-43-2 Benzene 87.8 1.0 ug/l
108-88-3 Toluene ND 1.0 ug/l
100-41-4 Ethylbenzene 3.4 1.0 ug/l
1330-20-7 Xylene (total)2.3 2.0 ug/l
1634-04-4 Methyl Tert Butyl Ether 65.8 1.0 ug/l
CAS No.Surrogate Recoveries Run# 1 Run# 2 Limits
17060-07-0 1,2-Dichloroethane-D4 116%81-120%
2037-26-5 Toluene-D8 104%93-105%
460-00-4 4-Bromofluorobenzene 100%89-107%
ND = Not detected 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
LA6435633.2
SGS North America Inc.
Report of Analysis Page 1 of 1
Client Sample ID:MW13
Lab Sample ID:LA64356-3 Date Sampled:06/03/20
Matrix:AQ - Ground Water Date Received:06/05/20
Method:SW846 8260D 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 1I076193.D 1 06/09/20 03:28 CP n/a n/a V1I2664
Run #2
Purge Volume
Run #1 5.0 ml
Run #2
Purgeable Aromatics, MTBE
CAS No.Compound Result RL Units Q
71-43-2 Benzene ND 1.0 ug/l
108-88-3 Toluene ND 1.0 ug/l
100-41-4 Ethylbenzene ND 1.0 ug/l
1330-20-7 Xylene (total)ND 2.0 ug/l
1634-04-4 Methyl Tert Butyl Ether ND 1.0 ug/l
CAS No.Surrogate Recoveries Run# 1 Run# 2 Limits
17060-07-0 1,2-Dichloroethane-D4 115%81-120%
2037-26-5 Toluene-D8 95%93-105%
460-00-4 4-Bromofluorobenzene 92%89-107%
ND = Not detected 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
LA6435633.3
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
LA643564
LA64356: Chain of Custody
Page 1 of 3
10 of 16
LA6435644.1
LA64356: Chain of Custody
Page 2 of 3
11 of 16
LA6435644.1
SGS Sample Receipt Summary
Job Number:LA64356 Client:ATC
Date / Time Received:6/5/2020 8:30:00 AM Delivery Method:FedEx
Project:RM 6578
4. No. Coolers:1
Airbill #'s:4913 8691 6080
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:
DV462;
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: (1.9/1.9); DV462
LA64356: Chain of Custody
Page 3 of 3
12 of 16
LA6435644.1
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
LA643565
Method Blank Summary Page 1 of 1
Job Number:LA64356
Account:ATCNCR ATC Group Services LLC
Project:RM#6578(ATCPSIX), 115 South Chimney Rock Rd, Greensboro, NC
Sample File ID DF Analyzed By Prep Date Prep Batch Analytical Batch
V1I2664-MB2 1I076171.D 1 06/08/20 CP n/a n/a V1I2664
The QC reported here applies to the following samples:Method: SW846 8260D
LA64356-1, LA64356-2, LA64356-3
CAS No.Compound Result RL Units Q
71-43-2 Benzene ND 1.0 ug/l
100-41-4 Ethylbenzene ND 1.0 ug/l
1634-04-4 Methyl Tert Butyl Ether ND 1.0 ug/l
108-88-3 Toluene ND 1.0 ug/l
1330-20-7 Xylene (total)ND 2.0 ug/l
CAS No.Surrogate Recoveries Limits
17060-07-0 1,2-Dichloroethane-D4 102%81-120%
2037-26-5 Toluene-D8 100%93-105%
460-00-4 4-Bromofluorobenzene 95%89-107%
14 of 16
LA6435655.1.1
Blank Spike/Blank Spike Duplicate Summary Page 1 of 1
Job Number:LA64356
Account:ATCNCR ATC Group Services LLC
Project:RM#6578(ATCPSIX), 115 South Chimney Rock Rd, Greensboro, NC
Sample File ID DF Analyzed By Prep Date Prep Batch Analytical Batch
V1I2664-BS1 1I076168.D 1 06/08/20 CP n/a n/a V1I2664
V1I2664-BSD1 1I076169.D 1 06/08/20 CP n/a n/a V1I2664
The QC reported here applies to the following samples:Method: SW846 8260D
LA64356-1, LA64356-2, LA64356-3
Spike BSP BSP BSD BSD Limits
CAS No.Compound ug/l ug/l %ug/l %RPD Rec/RPD
71-43-2 Benzene 20 18.4 92 17.0 85 8 82-119/14
100-41-4 Ethylbenzene 20 19.8 99 17.7 89 11 82-120/15
1634-04-4 Methyl Tert Butyl Ether 20 19.9 100 18.1 91 9 73-124/15
108-88-3 Toluene 20 18.6 93 16.8 84 10 82-118/15
1330-20-7 Xylene (total)60 59.3 99 52.8 88 12 82-122/15
CAS No.Surrogate Recoveries BSP BSD Limits
17060-07-0 1,2-Dichloroethane-D4 100%100%81-120%
2037-26-5 Toluene-D8 98%98%93-105%
460-00-4 4-Bromofluorobenzene 101%101%89-107%
* = Outside of Control Limits.
15 of 16
LA6435655.2.1
Matrix Spike/Matrix Spike Duplicate Summary Page 1 of 1
Job Number:LA64356
Account:ATCNCR ATC Group Services LLC
Project:RM#6578(ATCPSIX), 115 South Chimney Rock Rd, Greensboro, NC
Sample File ID DF Analyzed By Prep Date Prep Batch Analytical Batch
LA64311-15MS 1I076176.D 5 06/08/20 CP n/a n/a V1I2664
LA64311-15MSD 1I076177.D 5 06/08/20 CP n/a n/a V1I2664
LA64311-15 1I076189.D 1 06/09/20 CP n/a n/a V1I2664
The QC reported here applies to the following samples:Method: SW846 8260B
LA64356-1, LA64356-2, LA64356-3
LA64311-15 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 ND 100 100 100 100 74.0 74 30*41-155/14
100-41-4 Ethylbenzene ND 100 103 103 100 76.1 76 30*50-147/15
1634-04-4 Methyl Tert Butyl Ether ND 100 106 106 100 79.9 80 28*48-143/15
108-88-3 Toluene ND 100 96.9 97 100 71.6 72 30*40-153/15
1330-20-7 Xylene (total)ND 300 306 102 300 224 75 31*46-154/15
CAS No.Surrogate Recoveries MS MSD LA64311-15 Limits
17060-07-0 1,2-Dichloroethane-D4 104%104%114%81-120%
2037-26-5 Toluene-D8 98%100%100%93-105%
460-00-4 4-Bromofluorobenzene 101%99%77%*89-107%
* = Outside of Control Limits.
16 of 16
LA6435655.3.1

APPENDIX B
CONCENTRATION VERSUS TIME AND GROUNDWATER ELEVATION
VERSUS TIME GRAPHS

890.00
895.00
900.00
905.00
910.00
915.00
920.00
0
200
400
600
800
1000
1200
1400
1600
Concentration (µg/L)Date
MW-11
Concentration vs. Time Graph / Groundwater Elevation vs. Time Graph
MTBE Groundwater Elevation
GroundwaterElevation (feet)
890.00
895.00
900.00
905.00
910.00
915.00
920.00
0.00
100.00
200.00
300.00
400.00
500.00
600.00
Concentration (µg/L)Date
MW-12
Concentration vs. Time Graph / Groundwater Elevation vs. Time Graph
Benzene MTBE Groundwater Elevation
GroundwaterElevation (feet)
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)