FA-1015_19070_CA_MRP_20161216

Amec Foster Wheeler Environment & Infrastructure, Inc. Tel – [phone]
4021 Stirrup Creek Drive, Suite 100 Fax – [phone]
Durham, North Carolina 27703 www.amecfw.com
Licensure: NC Engineering F-1253; NC Geology C-247

©2016 Amec Foster Wheeler. All Rights Reserved.

TABLE OF CONTENTS

1.0 INTRODUCTION ................................................................................................................ 1
2.0 SITE HISTORY AND CHARACTERIZATION .................................................................... 1
3.0 PASSIVE FREE PRODUCT RECOVERY WITH OIL-ABSORBANT SOCKS .................... 2
3.1 GAUGING AND RECOVERY METHODOLOGY ........................................................................ 2
3.2 GAUGING AND RECOVERY RESULTS .................................................................................. 3
4.0 CONCLUSIONS AND RECOMMENDATIONS .................................................................. 3

FIGURES

Figure 1 Site Location Map
Figure 2 Site Layout
Figure 3 Groundwater Elevations, October 21, 2016
Figure 4 Free Product Thickness Map

TABLES

Table 1 Monitoring and Remediation Well Construction Information
Table 2 Cumulative Volume of Free Product Recovered from Site
Table 3 Groundwater Elevations and Free Product Thicknesses

Amec Foster Wheeler, Environment & Infrastructure, Inc. Page 1 Tel – [phone]
4021 Stirrup Creek Drive, Suite 100 Fax – [phone]
Durham, North Carolina 27703 www.amecfw.com
Licensure: NC Engineering F-1253; NC Geology C-247

©2016 Amec Foster Wheeler. All Rights Reserved.

1.0 INTRODUCTION

Amec Foster Wheeler Environment & Infrastructure, Inc. (Amec Foster Wheeler; formerly AMEC
Environment & Infrastructure, Inc.) has prepared this Free Product Recovery Report for the Food
Lion Distribution Center #4 facility located at 2940 Arrowhead Road in Dunn, Harnett County,
North Carolina (site; Figure 1). The site is owned by Delhaize America, the parent company of
Food Lion, Inc. (Food Lion). The site is currently utilized as a product distribution center for Food
Lion and includes a fueling station for the distribution trucks. Historically, diesel fuel was stored in
two former 25,000-gallon underground storage tanks (USTs). The site currently consists of the
distribution center/warehouse, the truck maintenance facility, refueling station and parking lots.

2.0 SITE HISTORY AND CHARACTERIZATION

The site is classified as intermediate risk. A receptor survey conducted in 2000 found that there
were five water-supply wells within 1,500 feet of the site, located hydraulically upgradient of the
source area, and that municipal water is available to these properties. The site is located in a rural
area consisting of properties used for both residential and commercial purposes.

Several assessments have been performed at the site to identify the extent of soil and
groundwater impacts attributed to the two former 25,000-gal USTs. Based on these assessments,
soil and groundwater were determined to be impacted by releases from the two diesel USTs and
associated product piping. During assessment activities in March 1997, free product was
observed and four recovery wells were installed in May 1998. Four aggressive fluid vapor
recovery (AFVR) events were performed in the summer of 1998 which removed 1,699 gallons of
free product from the recovery wells (Table 2). In September 1998, the two 25,000-gal USTs were
removed and replaced with aboveground storage tanks (ASTs). Following the removal of the
USTs, a Limited Site Assessment (LSA) was prepared in February 1999 and a Corrective Action
Plan (CAP) was prepared in June 2000. The proposed corrective action included free product
removal followed by monitored natural attenuation (MNA) for the impacted groundwater beneath
the site. Following submittal of the CAP, a pneumatic pump free product recovery system was
installed. Records regarding the length of time the system operated or how much product was
removed are not available. However, according to the previous facility representative, Mr. Mark
Davis, the system was shut down in 2007. Well construction details are presented in Table 1 and
the site layout including well locations is illustrated in Figure 2.

On July 8, 2010, the North Carolina Department of Environmental Quality (NCDEQ; formerly the
Department of Environment and Natural Resources [NCDENR]), Division of Waste Management
(DWM), UST Section issued a Notice of Regulatory Requirement (NORR) requiring that a Free
Product Evaluation and Free Product Recovery Report be submitted. In August 2010, the free
product recovery system was restarted, but was later deactivated because operation became
impractical.

In August 2012, Amec Foster Wheeler was retained by Delhaize America to conduct additional
free product assessment at the site, submit a Free Product Recovery System Specification Report
to the UST Section, and to implement an approved Free Product Recovery Plan in response to a
NORR received on May 31, 2011. Amec Foster Wheeler used Laser Induced
Fluorescence/Ultraviolet Optical Screening Tool (LIF/UVOST) technology provided by Columbia
Free Product Recovery Report
Food Lion Distribution Center #4
Dunn, North Carolina
December 16, 2016

Amec Foster Wheeler, Environment & Infrastructure, Inc. Page 2 Tel – [phone]
4021 Stirrup Creek Drive, Suite 100 Fax – [phone]
Durham, North Carolina 27703 www.amecfw.com
Licensure: NC Engineering F-1253; NC Geology C-247

©2016 Amec Foster Wheeler. All Rights Reserved.
Technologies, LLC of Baltimore, Maryland to assess the free product at the site. The LIF/UVOST
assessment was conducted in December 2012, and a Free Product Recovery System
Specification Report (System Specification Report) was submitted on April 5, 2013. The System
Specification Report detailed the successful delineation of free product using LIF/UVOST, and
recommended the installation of five supplementary recovery wells and additional AFVR events
to remove the remaining free product.

The recovery well installations proposed in the System Specification Report were authorized by
the UST Section and State Trust Fund in Task Authorization (TA) 19070-5, dated June 12, 2013,
and two AFVR events were approved in TA 19070-6, dated August 22, 2013. The recovery wells
were installed on July 9, 2013, and construction details of the monitoring and recovery wells are
provided in Table 1. The first of these AFVR event was conducted between September 9 and 11,
2013, and the second was conducted between January 15 and 17, 2014. The third and fourth
AFVR events were authorized in TA 19070-7, dated April 22, 2014. The third event was conducted
between April 23 and 25, 2014, and the fourth event was conducted between July 28 and 30,
2014. Approximately 692 gallons of free product were recovered during these four AFVR events.

Four additional quarterly AFVR events (events five through eight) were approved by the UST
Section and directed at six recovery wells (RW-2, RW-3, RW-4, RW-6, RW-8, and RW-9). The
fifth and sixth events were authorized under TA 19070-8, dated November 21, 2014; and were
performed between November 25 and 26, 2014, and on February 25, 2015, respectively. The
seventh and eighth events were authorized under TA 19070-9, dated June 5, 2015; and were
performed between July 21 and 22, 2015, and February 4 and 5, 2016, respectively.
Approximately 100 gallons of free product were recovered during the fifth through eighth AFVR
events.

The cumulative volume of free product recovered from the site is summarized in Table 2.

During the July 2015 and February 2016 AFVR events, approximately 4 and 5 gallons of free
product were recovered (estimated at approximately two gallons per quarter), respectively. Based
on these relatively low recovery volumes, the March 11, 2016 Free Product Recovery Report
recommended changing the free product recovery method for the site to passive collection using
oil-absorbent socks suspended in the recovery wells. In the March 22, 2016 Acknowledgement
of Report Receipt Letter, the UST Section agreed with the recommendation to temporarily replace
AFVR with oil-absorbent socks as the primary method for free product recovery. TA 19070-10
authorized three quarters free product gauging and free product recovery using oil-absorbent
socks.

3.0 PASSIVE FREE PRODUCT RECOVERY WITH OIL-ABSORBANT SOCKS

3.1 Gauging and Recovery Methodology

At the conclusion of the February 2016 AFVR event, an absorbent sock was deployed in each of
the seven recovery wells which have historically contained free product (RW-1 through RW-4,
RW-6, RW-8, and RW-9). Each sock measures 3 inches in diameter and 48 inches in length, and
is rated to absorb up 0.75 gallons of oil. The socks were hung from the well plugs and suspended
across the water table in order to absorb free product floating on the surface.
Free Product Recovery Report
Food Lion Distribution Center #4
Dunn, North Carolina
December 16, 2016

Amec Foster Wheeler, Environment & Infrastructure, Inc. Page 3 Tel – [phone]
4021 Stirrup Creek Drive, Suite 100 Fax – [phone]
Durham, North Carolina 27703 www.amecfw.com
Licensure: NC Engineering F-1253; NC Geology C-247

©2016 Amec Foster Wheeler. All Rights Reserved.

Amec Foster Wheeler performed three quarterly free product gauging and recovery events to
evaluate the effectiveness of the socks in recovering free product. The events were performed on
April 29, August 16, and October 21, 2016. During each event, depth to water and depth to free
product (if present) were measured in each of the site monitoring and recovery wells. An attempt
was made to measure free product thickness and depth to water in each recovery well prior to
removing the sock. If the sock prevented access by the interface probe, these measurements
were collected once the sock was removed and levels in the well were allowed to equilibrate.

To estimate the volume of recovered product, liquid was wrung from the socks into a bucket with
liter graduations, and the water and product were allowed to separate. Following measurement,
the used socks and extracted liquid were containerized in a 55-gallon steel drum and staged in
the compound of the former remediation system.

3.2 Gauging and Recovery Results

Based on the depth to water measurements from the April, August, and October 2016 gauging
events, corrected to account for free product if present, the direction of groundwater flow across
the site was generally to the west and was consistent with previous observations. A more
southwesterly direction was observed in august 2016, which is also consistent with historical
variation. Depth to water and groundwater elevations are summarized in Table 3 and the October
21, 2016 groundwater elevations are illustrated on Figure 3.

Measurable thicknesses of free product were found in recovery wells RW-2, RW-4, and RW-6 in
at least one of the three quarterly gauging and recovery events. Free product was measured in
RW-6 during each of the three events, and the largest thickness measured during the events was
measured in RW-6 in August 2016 (0.3 feet). Although measurable thicknesses were not
observed in recovery wells RW-3, RW-8, and RW-9, free product was recovered from the socks
in those wells. Evidence of free product was not observed in recovery well RW-7 during the
events. Free product thicknesses are summarized in Table 3 and illustrated on Figure 4.

In total, approximately 0.50, 0.75, and 0.25 gallons of free product were recovered during the
April, August, and October 2016 quarterly recovery events, respectively.

4.0 CONCLUSIONS AND RECOMMENDATIONS

During the three quarterly gauging and recovery events performed in April, August, and October,
2016, a total of approximately 1.5 gallons of free product, or an average of approximately 0.5
gallons per quarter were recovered from recovery wells RW-2, RW-3, RW-4, RW-6, RW-8, and
RW-9. When compared with an estimate of approximately two gallons of free product per quarter
recovered during the previous two AFVR events, passive recovery with oil-absorbent socks is an
effective and cost effective approach for recovering the remaining free product at the site. Based
on the minimal thicknesses measured in the recovery wells, and the total volumes of free product
recovered that were within the rated capacities for the individual socks, quarterly recovery events
appear to be an appropriate sock maintenance frequency.

Free Product Recovery Report
Food Lion Distribution Center #4
Dunn, North Carolina
December 16, 2016

Amec Foster Wheeler, Environment & Infrastructure, Inc. Page 4 Tel – [phone]
4021 Stirrup Creek Drive, Suite 100 Fax – [phone]
Durham, North Carolina 27703 www.amecfw.com
Licensure: NC Engineering F-1253; NC Geology C-247

©2016 Amec Foster Wheeler. All Rights Reserved.
Based on the success of the April, August, and October 2016 events, an additional four quarters
of free product recovery using oil absorbent socks are recommended.

Amec Foster Wheeler, Environment & Infrastructure, Inc. Tel – [phone]
4021 Stirrup Creek Drive, Suite 100 Fax – [phone]
Durham, North Carolina 27703 www.amecfw.com
Licensure: NC Engineering F-1253; NC Geology C-247

©2016 Amec Foster Wheeler. All Rights Reserved.
FIGURES
Copyright:© 2013 National Geographic Society, i-cubed³02,4001,200FeetFOOD LION DISTRIBUTION CENTER #42940 Arrowhead Road, Dunn, North CarolinaFigureDR: CHK:DATE:SITE LOCATION MAP1D.YoungD. Hriciga08/19/2016CLIENT:PROJ.:6480166020TITLE:SCALE:SITE:LOCATION:P:\Comm-Ind\Projects\Clients A to F\Food Lion\6480166020 Passive Recovery\7_GraphicsFOOD LION, INC.1 "=1,200 'SITEAmec Foster WheelerEnvironment & Infrastructure, Inc.4021 Stirrup Creek Drive, Suite 100Durham, NC 27703(919) 381-9900
!(!(!(#7#7#7#7#7#7#7#7#7"DExisting ASTsFormer Location of USTsProduct PipelinePump IslandsExisting Treatment SystemUS 301 SRW-9RW-8RW-7RW-6RW-5RW-4RW-3RW-2RW-1MW-1MW-3MW-2MW-4NC OneMap, NC Center for Geographic Information and Analysis, NC 911 BoardLegend"DDeep Monitoring Well!(Monitoring Well#7Recovery WellRoadwaysHarnett County Parcels³08040FeetFOOD LION DISTRIBUTION CENTER #42940 Arrowhead Road, Dunn, North CarolinaFigureDR: CHK:DATE:SITE LAYOUT2D.YoungD. Hriciga08/19/2016CLIENT:PROJ.:6480166020TITLE:SCALE:SITE:LOCATION:P:\Comm-Ind\Projects\Clients A to F\Food Lion\6480166020 Passive Recovery\7_GraphicsFOOD LION, INC.1 "=40 'Amec Foster WheelerEnvironment & Infrastructure, Inc.4021 Stirrup Creek Drive, Suite 100Durham, NC 27703(919) 381-9900
!(!(!(#0#0#0#0#0#0#0#0#0"DMW-4*168.29'RW-9168.23'RW-8168.26'RW-7167.75'RW-6167.44'RW-5166.90'RW-4167.49'RW-3169.00'RW-2168.14'RW-1166.44'MW-1166.29'MW-3170.53'MW-2166.64'US 301 SNC OneMap, NC Center for Geographic Information and Analysis, NC 911 BoardLegend"DDeep Monitoring Well!(Monitoring Well#0Recovery WellGroundwater ContourGroundwater Flow DirectionRoadwaysHarnett County Parcels³08040FeetNotes:166.29' = Groundwater elevation in feet.* = Not used in contouringFOOD LION DISTRIBUTION CENTER #42940 Arrowhead Road, Dunn, North CarolinaFigureDR: CHK:DATE:GROUNDWATER ELEVATIONSOCTOBER 21, 20163I. RosD. Hriciga10/24/2016CLIENT:PROJ.:6480166020TITLE:SCALE:SITE:Amec Foster WheelerEnvironment & Infrastructure, Inc.4021 Stirrup Creek Drive, Suite 100Durham, NC 27703(919) 381-9900LOCATION:P:\Comm-Ind\Projects\Clients A to F\Food Lion\6480166020 Passive Recovery\7_GraphicsFOOD LION, INC.1 "=40 '167.0'168.0'170.0'167.0'168.0'169.0'170.0'
#0#0#0#0#0#0#0#0#0!(!(!("DMW-204/29/16 ND08/09/16 ND10/21/16 NDRW-104/29/16 ND08/09/16 ND10/21/16 NDRW-504/29/16 ND08/09/16 ND10/21/16 NDRW-704/29/16 ND08/09/16 ND10/21/16 NDMW-304/29/16 ND08/09/16 ND10/21/16 NDRW-304/29/16 ND08/09/16 ND10/21/16 NDRW-904/29/16 ND08/09/16 ND10/21/16 NDRW-404/29/16 0.0208/09/16 ND10/21/16 NDRW-604/29/16 0.0808/09/16 0.3010/21/16 0.02RW-204/29/16 0.0108/09/16 0.0610/21/16 NDMW-404/29/16 ND08/09/16 ND10/21/16 NDRW-804/29/16 ND08/09/16 ND10/21/16 NDMW-104/29/16 ND08/09/16 ND10/21/16 NDUS 301 SNC OneMap, NC Center for Geographic Information and Analysis, NC 911 BoardLegend"DDeep Monitoring Well!(Monitoring Well #0Recovery WellRoadwaysHarnett County Parcels³08040FeetNotes:Values indicate free product thickness in feet.Measurable product thicknesses are BOLD.ND = Free product either not detected or unmeasurableFOOD LION DISTRIBUTION CENTER #42940 Arrowhead Road, Dunn, North CarolinaFigureDR: CHK:DATE:FREE PRODUCT THICKNESS MAP4A. ConklinD. Hriciga11/1/16CLIENT:PROJ.:6480166020TITLE:SCALE:SITE:LOCATION:P:\Comm-Ind\Projects\Clients A to F\Food Lion\6480166020 Passive Recovery\7_GraphicsFOOD LION, INC.1 "=40 'Amec Foster WheelerEnvironment & Infrastructure, Inc.4021 Stirrup Creek Drive, Suite 100Durham, NC 27703(919) 381-9900

Amec Foster Wheeler, Environment & Infrastructure, Inc. Tel – [phone]
4021 Stirrup Creek Drive, Suite 100 Fax – [phone]
Durham, North Carolina 27703 www.amecfw.com
Licensure: NC Engineering F-1253; NC Geology C-247

©2016 Amec Foster Wheeler. All Rights Reserved.
TABLES
Table 1Monitoring and Remediation Well Construction InformationFood Lion Distribution Center #4Dunn, North CarolinaProject # 6480166020Well IDDate InstalledDate Water Level MeasuredWell Casing Diameter (inches)Well Casing Depth (feet bgs)Screened Interval (feet bgs)Depth of Well (feet bgs)Top of Casing Elevation* (feet AMSL)Depth to Water (feet bgs)Free Product Thickness from 2012 LIF (feet)Free Product Thickness in Well ** (feet)Ground-water Elevation*** (feet)Location Northing*Location Easting*MW-111/17/98 10/21/16 2 15 5-15 15 170.22 3.93 NM 0 166.29 555522.75 2110041.08MW-211/17/98 10/21/16 2 15 5-15 15 172.88 6.24 NM 0 166.64 555306.26 2110091.14MW-311/17/98 10/21/16 2 15 5-15 15 172.72 2.19 NM 0 170.53 555570.96 2110496.71MW-411/17/98 10/21/16 2 50 40-50 50 173.80 5.51 ~2.2 0 168.29 555475.34 2110282.35RW-111/11/98 10/21/16 4 13.5 3.5-13.5 13.5 172.28 5.84 NM 0 166.44 555514.18 2110151.53RW-211/11/98 10/21/16 4 14.5 4.5-14.5 14.5 173.53 5.39 ~2.2 0 168.14 555471.42 2110281.62RW-311/11/98 10/21/16 4 14.5 4.5-14.5 14.5 173.44 4.44 ~1.4 0 169.00 555473.39 2110346.48RW-411/11/98 10/21/16 4 14 4-14 14 173.14 5.65 ~2.0 0 167.49 555485.91 2110222.20RW-507/09/13 10/21/16 4 13 3-13 13 173.06 6.19 ~1.5 0 166.87 555467.02 2110177.66RW-607/09/13 10/21/16 4 18 3-18 18 173.64 6.22 ~1.7 0.02 167.44 555449.25 2110220.85RW-707/09/13 10/21/16 4 18 3-18 18 173.52 5.77 ~2.0 0 167.75 555521.35 2110263.81RW-807/09/13 10/21/16 4 14 4-14 14 173.71 5.45 ~2.2 0 168.26 555505.03 2110307.87RW-907/09/13 10/21/16 4 14.5 4-14.5 14.5 173.38 5.15 ~2.1 0 168.23 555540.31 2110319.95Notes:bgs = below ground surfaceNM = not measured*Well locations and casing elevations from KCI survey of 7/26/2013, based on NC State Plane NAD '83 and NAVD '88**RW-1 through RW-4, RW-6, RW-8, and RW-9 contained oil-absorbant socks at time of measurement.*** If free product is present in a well, groundwater elevation is calculated by: [Top of Casing Elevation - Depth to Water] + [free product thickness x 0.8581]LIF - Laser-induced fluorescence; thickness determined in the December 2012 event.
Table 2Cumulative Volume of Free Product Recovered from SiteFood Lion Distribution Center #4Dunn, North CarolinaProject # 6480166020Date of Recovery EventTotal Volume Recovered from Site During Current Recovery Event (gallons)Cumulative Total of Volume Recovered to Date from All Recovery Events (gallons)05/08/98 (Historical AFVR)32632606/12/98 (Historical AFVR)52485007/06/98 (Historical AFVR)523137307/22/98 (Historical AFVR)326169909/09/13 - 09/11/13 (1st AFVR Event)192189101/15/14 - 01/17/14 (2nd AFVR Event)190208104/23/14 - 04/25/14 (3rd AFVR Event)179226007/28/14 - 07/30-14 (4th AFVR Event)131239111/25/14 - 11/26/14 (5th AFVR Event)8124722/25/15 (6th AFVR Event)10248207/21/15 - 07/22/15 (7th AFVR Event)4248602/04/16 - 02/05/16 (8th AFVR Event)5249104/29/16 (Socks)0.502491.5008/09/16 (Socks)0.752492.2510/21/16 (Socks)0.252492.50Notes:AFVR = Aggressive Fuid Vapor RecoverySocks = recovery via oil-only absorbent socksVolumes greater than one gallon are reounded to the nearest gallon.Volumes less than one gallon are rounded to the nearest quarter gallon.
Table 3
Groundwater Elevations and Free Product Thicknesses
Food Lion Distribution Center #4
Dunn, North Carolina
Project # 6480166020
Well ID Date
Measured
Screened
Interval
(feet bgs)
Top of
Casing
Elevation*
(feet
AMSL)
Depth
to
Water
(feet)
Depth to
Free
Product
(feet)
Free
Product
Thickness
(feet)
Depth to Water
Corrected for
Free Product
Thickness**
(feet)
Groundwater
Surface
Elevation***
(feet AMSL)
MW-1 11/17/98 5-15 170.22 5.58 NA 0 5.58 164.64
MW-1 10/19/10 5-15 170.22 4.08 NA 0 4.08 166.14
MW-1 09/09/13 5-15 170.22 4.02 NA 0 4.02 166.20
MW-1 01/15/14 5-15 170.22 3.74 NA 0 3.74 166.48
MW-1 07/28/14 5-15 170.22 3.90 NA 0 3.90 166.32
MW-1 04/23/14 5-15 170.22 4.18 NA 0 4.18 166.04
MW-1 11/25/14 5-15 170.22 4.21 NA 0 4.21 166.01
MW-1 02/25/15 5-15 170.22 3.99 NA 0 3.99 166.23
MW-1 07/21/15 5-15 170.22 4.30 NA 0 4.30 165.92
MW-1 02/04/16 5-15 170.22 3.68 NA 0 3.68 166.54
MW-1 04/29/16 5-15 170.22 4.01 NA 0 4.01 166.21
MW-1 08/09/16 5-15 170.22 4.18 NA 0 4.18 166.04
MW-1 10/21/16 5-15 170.22 3.93 NA 0 3.93 166.29
MW-2 11/17/98 5-15 172.88 7.73 NA 0 7.73 165.15
MW-2 10/19/10 5-15 172.88 6.76 NA 0 6.76 166.12
MW-2 12/07/12 5-15 172.88 8.35 NA 0 8.35 164.53
MW-2 09/09/13 5-15 172.88 6.76 NA 0 6.76 166.12
MW-2 01/15/14 5-15 172.88 6.19 NA 0 6.19 166.69
MW-2 04/23/14 5-15 172.88 5.93 NA 0 5.93 166.95
MW-2 07/28/14 5-15 172.88 6.05 NA 0 6.05 166.83
MW-2 11/25/14 5-15 172.88 6.14 NA 0 6.14 166.74
MW-2 02/25/15 5-15 172.88 6.42 NA 0 6.42 166.46
MW-2 07/21/15 5-15 172.88 7.18 NA 0 7.18 165.70
MW-2 02/04/16 5-15 172.88 5.87 NA 0 5.87 167.01
MW-2 04/29/16 5-15 172.88 6.42 NA 0 6.42 166.46
MW-2 08/09/16 5-15 172.88 6.99 NA 0 6.99 165.89
MW-2 10/21/16 5-15 172.88 6.24 NA 0 6.24 166.64
MW-3 11/18/98 5-15 172.72 6.47 NA 0 6.47 166.25
MW-3 10/19/10 5-15 172.72 4.00 NA 0 4.00 168.72
MW-3 12/07/12 5-15 172.72 7.16 NA 0 7.16 165.56
Table 3
Groundwater Elevations and Free Product Thicknesses
Food Lion Distribution Center #4
Dunn, North Carolina
Project # 6480166020
Well ID Date
Measured
Screened
Interval
(feet bgs)
Top of
Casing
Elevation*
(feet
AMSL)
Depth
to
Water
(feet)
Depth to
Free
Product
(feet)
Free
Product
Thickness
(feet)
Depth to Water
Corrected for
Free Product
Thickness**
(feet)
Groundwater
Surface
Elevation***
(feet AMSL)
MW-3 09/09/13 5-15 172.72 3.63 NA 0 3.63 169.09
MW-3 01/15/14 5-15 172.72 1.13 NA 0 1.13 171.59
MW-3 04/23/14 5-15 172.72 1.63 NA 0 1.63 171.09
MW-3 07/28/14 5-15 172.72 4.13 NA 0 4.13 168.59
MW-3 11/25/14 5-15 172.72 4.18 NA 0 4.18 168.54
MW-3 02/25/15 5-15 172.72 2.44 NA 0 2.44 170.28
MW-3 07/21/15 5-15 172.72 4.68 NA 0 4.68 168.04
MW-3 02/04/16 5-15 172.72 1.34 NA 0 1.34 171.38
MW-3 04/29/16 5-15 172.72 2.94 NA 0 2.94 169.78
MW-3 08/09/16 5-15 172.72 4.78 NA 0 4.78 167.94
MW-3 10/21/16 5-15 172.72 2.19 NA 0 2.19 170.53
MW-4 11/19/98 45-50 173.80 28.91 NA 0 28.91 144.89
MW-4 10/19/10 45-50 173.80 10.81 NA 0 10.81 162.99
MW-4 09/09/13 45-50 173.80 11.97 NA 0 11.97 161.83
MW-4 01/15/14 45-50 173.80 NM NM NM NA NA
MW-4 04/23/14 45-50 173.80 NM NM NM NA NA
MW-4 07/28/14 45-50 173.80 NM NM NM NA NA
MW-4 11/25/14 45-50 173.80 NM NM NM NA NA
MW-4 02/25/15 45-50 173.80 NM NM NM NA NA
MW-4 07/21/15 45-50 173.80 0.21 NA 0 0.21 173.59
MW-4 02/04/16 45-50 173.80 0.35 NA 0 0.35 173.45
MW-4 04/29/16 45-50 173.80 1.34 NA 0 1.34 172.46
MW-4 08/09/16 45-50 173.80 4.29 NA 0 4.29 169.51
MW-4 10/21/16 45-50 173.80 5.51 NA 0 5.51 168.29
RW-1 11/11/98 3.5-13.5 172.28 7.75 6.95 0.80 7.06 165.22
RW-1 10/19/10 3.5-13.5 172.28 6.80 5.95 0.85 6.07 166.21
RW-1 12/03/12 3.5-13.5 172.28 7.19 6.80 0.39 6.86 165.42
RW-1 09/09/13 3.5-13.5 172.28 6.31 5.46 0.85 5.58 166.70
RW-1 01/15/14 3.5-13.5 172.28 6.13 5.81 0.32 5.86 166.42
RW-1 04/23/14 3.5-13.5 172.28 5.95 5.81 0.14 5.83 166.45
Table 3
Groundwater Elevations and Free Product Thicknesses
Food Lion Distribution Center #4
Dunn, North Carolina
Project # 6480166020
Well ID Date
Measured
Screened
Interval
(feet bgs)
Top of
Casing
Elevation*
(feet
AMSL)
Depth
to
Water
(feet)
Depth to
Free
Product
(feet)
Free
Product
Thickness
(feet)
Depth to Water
Corrected for
Free Product
Thickness**
(feet)
Groundwater
Surface
Elevation***
(feet AMSL)
RW-1 07/28/14 3.5-13.5 172.28 6.15 NA 0 6.15 166.13
RW-1 11/25/14 3.5-13.5 172.28 6.21 NA 0 6.21 166.07
RW-1 02/25/15 3.5-13.5 172.28 5.99 NA 0 5.99 166.29
RW-1 07/21/15 3.5-13.5 172.28 6.21 NA 0 6.21 166.07
RW-1 02/04/16 3.5-13.5 172.28 5.71 NA 0 5.71 166.57
RW-1 04/29/16 3.5-13.5 172.28 6.06 NA 0 6.06 166.22
RW-1 08/09/16 3.5-13.5 172.28 6.14 NA 0 6.14 166.14
RW-1 10/21/16 3.5-13.5 172.28 5.84 NA 0 5.84 166.44
RW-2 11/11/98 4.5-14.5 173.53 11.65 8.10 3.55 8.60 164.93
RW-2 10/19/10 4.5-14.5 173.53 8.15 6.15 2.00 6.43 167.10
RW-2 12/03/12 4.5-14.5 173.53 10.35 8.02 2.33 8.35 165.18
RW-2 09/09/13 4.5-14.5 173.53 8.12 6.11 2.01 6.40 167.13
RW-2 01/15/14 4.5-14.5 173.53 5.69 5.00 0.69 5.10 168.43
RW-2 04/23/14 4.5-14.5 173.53 5.72 5.17 0.55 5.25 168.28
RW-2 07/28/14 4.5-14.5 173.53 6.90 6.51 0.39 6.57 166.96
RW-2 11/25/14 4.5-14.5 173.53 7.16 6.69 0.47 6.76 166.77
RW-2 02/25/15 4.5-14.5 173.53 5.80 5.63 0.17 5.65 167.88
RW-2 07/21/15 4.5-14.5 173.53 7.14 6.84 0.30 6.88 166.65
RW-2 02/04/16 4.5-14.5 173.53 5.16 5.04 0.12 5.06 168.47
RW-2 04/29/16 4.5-14.5 173.53 5.85 5.84 0.01 5.84 167.69
RW-2 08/09/16 4.5-14.5 173.53 6.99 6.93 0.06 6.94 166.59
RW-2 10/21/16 4.5-14.5 173.53 5.39 NA 0.00 5.39 168.14
RW-3 11/11/98 4.5-14.5 173.44 10.70 7.95 2.75 8.34 165.10
RW-3 10/19/10 4.5-14.5 173.44 7.65 5.39 2.26 5.71 167.73
RW-3 12/03/12 4.5-14.5 173.44 9.93 7.64 2.29 7.96 165.48
RW-3 09/09/13 4.5-14.5 173.44 7.55 5.36 2.19 5.67 167.77
RW-3 01/15/14 4.5-14.5 173.44 3.97 3.47 0.50 3.54 169.90
RW-3 04/23/14 4.5-14.5 173.44 4.70 4.09 0.61 4.18 169.26
RW-3 07/28/14 4.5-14.5 173.44 6.31 5.92 0.39 5.98 167.46
RW-3 11/25/14 4.5-14.5 173.44 5.88 5.68 0.20 5.71 167.73
Table 3
Groundwater Elevations and Free Product Thicknesses
Food Lion Distribution Center #4
Dunn, North Carolina
Project # 6480166020
Well ID Date
Measured
Screened
Interval
(feet bgs)
Top of
Casing
Elevation*
(feet
AMSL)
Depth
to
Water
(feet)
Depth to
Free
Product
(feet)
Free
Product
Thickness
(feet)
Depth to Water
Corrected for
Free Product
Thickness**
(feet)
Groundwater
Surface
Elevation***
(feet AMSL)
RW-3 02/25/15 4.5-14.5 173.44 4.90 4.76 0.14 4.78 168.66
RW-3 07/21/15 4.5-14.5 173.44 6.47 6.40 0.07 6.41 167.03
RW-3 02/04/16 4.5-14.5 173.44 4.08 NA 0.00 4.08 169.36
RW-3 04/29/16 4.5-14.5 173.44 5.12 NA 0.00 5.12 168.32
RW-3 08/09/16 4.5-14.5 173.44 6.49 NA 0.00 6.49 166.95
RW-3 10/21/16 4.5-14.5 173.44 4.44 NA 0.00 4.44 169.00
RW-4 11/11/98 4-14 173.14 11.00 7.65 3.35 8.13 165.01
RW-4 10/19/10 4-14 173.14 8.65 5.85 2.80 6.25 166.89
RW-4 12/03/12 4-14 173.14 10.00 7.50 2.50 7.85 165.29
RW-4 09/09/13 4-14 173.14 8.40 5.86 2.54 6.22 166.92
RW-4 01/15/14 4-14 173.14 5.71 5.12 0.59 5.20 167.94
RW-4 04/23/14 4-14 173.14 6.04 5.31 0.73 5.41 167.73
RW-4 07/28/14 4-14 173.14 7.90 6.30 1.60 6.53 166.61
RW-4 11/25/14 4-14 173.14 6.87 6.50 0.37 6.55 166.59
RW-4 02/25/15 4-14 173.14 5.90 5.70 0.20 5.73 167.41
RW-4 07/21/15 4-14 173.14 6.86 6.61 0.25 6.65 166.49
RW-4 02/04/16 4-14 173.14 5.40 5.34 0.06 5.35 167.79
RW-4 04/29/16 4-14 173.14 6.02 6.00 0.02 6.00 167.14
RW-4 08/09/16 4-14 173.14 6.78 NA 0.00 6.78 166.36
RW-4 10/21/16 4-14 173.14 5.65 NA 0.00 5.65 167.49
RW-5 09/09/13 3-13 173.06 6.57 NA 0 6.57 166.49
RW-5 01/15/14 3-13 173.06 6.00 NA 0 6.00 167.06
RW-5 04/23/14 3-13 173.06 6.09 NA 0 6.09 166.97
RW-5 07/28/14 3-13 173.06 6.81 NA 0 6.81 166.25
RW-5 11/25/14 3-13 173.06 NM NM NM NA NA
RW-5 02/25/15 3-13 173.06 6.30 NA 0 6.30 166.76
RW-5 07/21/15 3-13 173.06 6.92 NA 0 6.92 166.14
RW-5 02/04/16 3-13 173.06 5.98 NA 0 5.98 167.08
RW-5 04/29/16 3-13 173.06 6.52 NA 0 6.52 166.54
Table 3
Groundwater Elevations and Free Product Thicknesses
Food Lion Distribution Center #4
Dunn, North Carolina
Project # 6480166020
Well ID Date
Measured
Screened
Interval
(feet bgs)
Top of
Casing
Elevation*
(feet
AMSL)
Depth
to
Water
(feet)
Depth to
Free
Product
(feet)
Free
Product
Thickness
(feet)
Depth to Water
Corrected for
Free Product
Thickness**
(feet)
Groundwater
Surface
Elevation***
(feet AMSL)
RW-5 08/09/16 3-13 173.06 6.90 NA 0 6.90 166.16
RW-5 10/21/16 3-13 173.06 6.16 NA 0 6.16 166.90
RW-6 09/09/13 3-18 173.64 8.39 6.57 1.82 6.83 166.81
RW-6 01/15/14 3-18 173.64 7.08 5.73 1.35 5.92 167.72
RW-6 04/23/14 3-18 173.64 6.31 6.05 0.26 6.09 167.55
RW-6 07/28/14 3-18 173.64 7.61 6.95 0.66 7.04 166.60
RW-6 11/25/14 3-18 173.64 8.20 6.99 1.21 7.16 166.48
RW-6 02/25/15 3-18 173.64 6.48 6.36 0.12 6.38 167.26
RW-6 07/21/15 3-18 173.64 8.00 7.19 0.81 7.30 166.34
RW-6 02/04/16 3-18 173.64 6.35 5.88 0.47 5.95 167.69
RW-6 04/29/16 3-18 173.64 6.68 6.60 0.08 6.61 167.03
RW-6 08/09/16 3-18 173.64 7.57 7.27 0.30 7.31 166.33
RW-6 10/21/16 3-18 173.64 6.22 6.20 0.02 6.20 167.44
RW-7 09/09/13 3-18 173.52 6.50 NA 0 6.50 167.02
RW-7 01/15/14 3-18 173.52 5.49 NA 0 5.49 168.03
RW-7 04/23/14 3-18 173.52 5.62 NA 0 5.62 167.90
RW-7 07/28/14 3-18 173.52 6.75 NA 0 6.75 166.77
RW-7 11/25/14 3-18 173.52 6.82 NA 0 6.82 166.70
RW-7 02/25/15 3-18 173.52 6.97 NA 0 6.97 166.55
RW-7 07/21/15 3-18 173.52 6.98 NA 0 6.98 166.54
RW-7 02/04/16 3-18 173.52 5.61 NA 0 5.61 167.91
RW-7 04/29/16 3-18 173.52 6.32 NA 0 6.32 167.20
RW-7 08/09/16 3-18 173.52 7.02 NA 0 7.02 166.50
RW-7 10/21/16 3-18 173.52 5.77 NA 0 5.77 167.75
RW-8 09/09/13 4-14 173.71 6.81 6.27 0.54 6.35 167.36
RW-8 01/15/14 4-14 173.71 5.21 5.00 0.21 5.03 168.68
RW-8 04/23/14 4-14 173.71 5.26 5.21 0.05 5.22 168.49
RW-8 07/28/14 4-14 173.71 6.92 6.62 0.30 6.66 167.05
RW-8 11/25/14 4-14 173.71 6.59 6.36 0.23 6.39 167.32
Table 3
Groundwater Elevations and Free Product Thicknesses
Food Lion Distribution Center #4
Dunn, North Carolina
Project # 6480166020
Well ID Date
Measured
Screened
Interval
(feet bgs)
Top of
Casing
Elevation*
(feet
AMSL)
Depth
to
Water
(feet)
Depth to
Free
Product
(feet)
Free
Product
Thickness
(feet)
Depth to Water
Corrected for
Free Product
Thickness**
(feet)
Groundwater
Surface
Elevation***
(feet AMSL)
RW-8 02/25/15 4-14 173.71 5.68 5.67 0.01 5.67 168.04
RW-8 07/21/15 4-14 173.71 7.41 6.87 0.54 6.95 166.76
RW-8 02/04/16 4-14 173.71 5.50 5.18 0.32 5.23 168.48
RW-8 04/29/16 4-14 173.71 6.05 NA 0 6.05 167.66
RW-8 08/09/16 4-14 173.71 6.98 NA 0 6.98 166.73
RW-8 10/21/16 4-14 173.71 5.45 NA 0 5.45 168.26
RW-9 09/09/13 4-14.5 173.38 6.78 6.51 0.27 6.55 166.83
RW-9 01/15/14 4-14.5 173.38 5.59 5.56 0.03 5.56 167.82
RW-9 04/23/14 4-14.5 173.38 4.89 4.80 0.09 4.81 168.57
RW-9 07/28/14 4-14.5 173.38 6.40 6.30 0.10 6.31 167.07
RW-9 11/25/14 4-14.5 173.38 6.04 6.02 0.02 6.02 167.36
RW-9 02/25/15 4-14.5 173.38 5.28 NA 0 5.28 168.10
RW-9 07/21/15 4-14.5 173.38 6.63 6.56 0.07 6.57 166.81
RW-9 02/04/16 4-14.5 173.38 4.90 4.89 0.01 4.89 168.49
RW-9 04/29/16 4-14.5 173.38 5.74 NA 0 5.74 167.64
RW-9 08/09/16 4-14.5 173.38 6.63 NA 0 6.63 166.75
RW-9 10/21/16 4-14.5 173.38 5.15 NA 0 5.15 168.23
Notes:
*Well locations and casing elevations surveyed 7/26/2013 to NC State Plane NAD '83 and NAVD '88
** If free product is present in a well, corrected depth to water is calculated by:
[Depth to Water] - [free product thickness x 0.8581]
***Groundwater surface elevation is calculated using corrected depths to water
AMSL = above mean sea level
bgs = below ground surface
NA = Not Applicable
NM = Not Measured