WS-5240_18698_CA_RPTS_20221104

 
WithersRavenel
Our People. Your Success. 

115 MacKenan Drive | Cary, NC 27511 
t: 919.469.3340 | f: 919.467.6008 | www.withersravenel.com | License No. F‐1479 
Asheville | Cary | Charlotte | Greensboro | Lumberton | Pittsboro | Raleigh | Southern Pines | Wilmington 

November 1, 2022 

State of North Carolina 
Department of Environment Quality  
Trust Fund Branch 
Division of Waste Management‐Underground Storage Tank Section  
1646 Mail Service Center 
Raleigh, North Carolina 27699‐1646 

Attn: Mr. Herb Berger, L.G. 

RE: LETTER REPORT – MOBILE MULTI‐PHASE EXTRACTION EVENT 
Duke Foster/D&M Market 
54 Nicks Road 
Mebane, Caswell County, North Carolina 
Groundwater Incident Number: 18698 
UST Number: WS‐5420 
WR Project Number:  02172214.03 

Mr. Berger: 

WithersRavenel, Inc. (WR) has completed this Letter Report to document the Air Sparge 
Enhanced Mobile Multi‐Phase Extraction (AS/MMPE) event described in task authorization (TA) 
TA‐04 for the above referenced site approved by the Trust Fund Branch on July 25, 2022.  WR 
mobilized to the subject site on October 10, 2022, for the purposes of performing a MMPE 
event on monitoring well MW‐3 and utilizing air sparge well AS‐1 for air injection. The site 
location is depicted on Figure 1 and site features including monitoring well locations are depicted 
on Figure 2. 

Sparge‐Enhanced MMPE Event 

Prior to performance of the March 2020 sparge enhanced MMPE event, S&ME completed and 
submitted a “Deemed as Permitted” Notification of Intent (NOI) to construct or operate injection 
wells to the NCDEQ‐DWR.  NCDEQ approved the NOI with Permit # WI0400541 on February 
28, 2020.  A copy of the NOI and approval, as well as an Injection Event Record for the October 
2022 event, are included in Appendix A.   

WR personnel, along with Eastern Environmental Management, LLC (Eastern) mobilized to the 
site on October 10, 2022, for the purposes of performing a 96‐hour sparge enhanced MMPE 
event. This event was initiated to reduce the presence of compounds exceeding GCLs within 
well MW‐3. In the performance of the MMPE, Eastern connected to air sparge well AS‐1 and 
utilized air sparge and vacuum extraction equipment mounted within an enclosed trailer and 
stored removed fluids within a 6,000‐gallon tanker trailer.   

WithersRavenel
Our People. Your Success. 
Letter Report ‐ MMPE Event         Duke Foster/D&M Market (Inc. 18698) 
November 2022  Page 2 of 3 

WR gauged site monitoring wells prior to the performance of remedial actions at the location. 
Gauging of groundwater elevations within wells MW‐1, MW‐3 and MW‐4 showed the following:  
Well ID Depth to 
LNAPL 
Depth to Water 
(feet below top of 
casing) 
Well Depth 
(feet below top 
of casing) 
LNAPL 
Thickness 
MW‐1 ‐‐‐ 22.15 30  ‐‐‐ 
MW‐3 ‐‐‐ 22.46 30  ‐‐‐ 
MW‐4 ‐‐‐ 22.18 30  ‐‐‐ 

In the completion of the sparge enhanced MMPE activities, Eastern installed a 1‐in dia PVC 
stingers into well MW‐3 at a depth approximately 1‐ft beneath the measured groundwater 
elevation. These stingers were plumbed at the surface to a 2.0‐in chemical resistant flexible hose, 
which was connected to a vacuum truck servicing the vacuum/pressure regenerative blower 
housed in the equipment trailer.  For induction of air for the purposes of sparging, ½‐in dia PVC 
tubing was placed within AS‐1 at a depth beneath the measured groundwater elevation.  This 
tubing was plumbed to a compressor with which air was injected into air sparge well AS‐1.   
Following setup, the air sparge/MMPE system was started and operated continuously for a 
period of 96‐hours to induce movement and recovery of total fluids from MW‐3.  Eastern 
personnel monitored the performance of the sparge and MMPE system over the course of the 
event, adjusted the stinger depths and optimized recovery as necessary.  
Throughout the course of the MMPE event, effluent emissions ranged from 154 parts per million 
(ppm) to 981 ppm. In completion of the sparge‐enhanced MMPE event, a total of 5,342‐gal of 
contaminated water was recovered and based on mass removal calculations, a total of 113.63‐
pounds or 18.18‐gal of VOCs were removed as vapor.   
After completion of the MMPE event, Eastern dismantled the MMPE setup at the location. WR 
personnel gauged MW‐1, MW‐3, and MW‐4 during the water recovery after removal of the 
stingers and found the water levels to be the following:  
 MW‐1 = 23.78‐ft,  
 MW‐3 = 29.60‐ft, and  
 MW‐4 = 22.70‐ft.  
No LNAPL was measured within the wells following completion of the MMPE event.  
Field notes from the event are included in Appendix B. The manifest, disposal documents, and 
the MMPE report are included in Appendix C.  

WithersRavenel
Our People. Your Success. 
Letter Report ‐ MMPE Event         Duke Foster/D&M Market (Inc. 18698) 
November 2022  Page 3 of 3 

WR appreciates the opportunity to be of service to the Federal & State Lead Program.  Should 
you have any questions regarding the attached, please do not hesitate to contact Elizabeth Allyn 
at (919) 469‐3340. 

Cordially, 
WithersRavenel

David C. Vail 
 Elizabeth A. Allyn, P.G. 
Environmental Scientist I Environmental Project Geologist II 

WithersRavenel
Our People. Your Success 

FIGURES 

CBM
LA
DRAWN BY:
04/15/21 02172214.03
1
SUBJECT SITE
±1.33 ACRES
SCALE:FIGURE NO.:
PROJECT NO.:DATE:APPROVED BY:
DUKE FOSTER - D&M MARKET
NCDEQ INCIDENT #18698
54 NICKS ROAD
MEBANE, CASWELL COUNTY, NC
GENERAL LOCATION MAP
1"=500 '
GRAPHIC SCALE
1 inch = 500 ft.
0 500250 1000
WithersRavenel
Engineers | Planners | Surveyors
115 MacKenan Drive | Cary, NC 27511 | t: 919.469.3340 | license #: F-1479
www.withersravenel.com
N
I
C
K
S

R
O
A
DNC HWY 119MW-1
MW-2
MW-3
MW-4
AS-1
FORMER UST
SYSTEM
SITE PROPERTY
BOUNDARY
LEGEND
TYPE II MONITORING WELL LOCATION
AIR SPARGE WELL LOCATION
NOTES:
1.) 2013 AERIAL OBTAINED FROM THE LOCAL COUNTY GIS DEPARTMENT.
2.) ALL MEASUREMENTS IN FEET 1 inch = 30 ft.
3015 60
GRAPHIC SCALE
0
CBM
LA
DRAWN BY:
1"=30 '
07/05/22 02172214.03
2
SCALE:FIGURE NO.:
PROJECT NO.:DATE:APPROVED BY:
SITE MAP
WithersRavenel
Engineers | Planners | Surveyors
115 MacKenan Drive | Cary, NC 27511 | t: 919.469.3340 | license #: F-1479
www.withersravenel.com
DUKE FOSTER - D&M MARKET
NCDEQ INCIDENT #18698
54 NICKS ROAD
MEBANE, CASWELL COUNTY, NC

WithersRavenel
Our People. Your Success 

TABLE 
Well ID Date of 
Installation
Screened 
Interval 
(feet)
Total Depth (feet below 
ground 
surface)
Well 
Diameter (inches)
Top‐of‐Casing 
Elevation 
(feet)
Date Water Level Measured Depth‐to‐LNAPL
(feet)
Depth‐to‐Water
Uncorrected(feet)
LNAPL Thickness
(feet)
Corrected 
Groundwater 
SurfaceElevation          
(feet)
7/1/2015 21.47 21.50 0.03 83.65
2/17/2016 20.45 20.48 0.03 84.67
10/4/2017 NM 22.06 NM 83.06
3/21/2019 NM 17.95 NM 87.17
3/2/2020 NM 18.85 NM 86.27
3/6/2020 NM 19.55 NM 85.57
3/31/2020 NM 19.01 NM 86.11
3/30/2021 NM 16.21 NM 88.91
6/3/2022 NM 19.89 NM 85.23
10/10/22 (pre‐MMPE) NM 22.15 NM 82.97
10/14/2022 (post‐MMPE) NM 23.78 NM 81.34
2/17/2016 NM 22.00 NM 83.69
10/4/2017 NM 22.66 NM 83.03
3/21/2019 NM 19.93 NM 85.76
3/2/2020 NM 20.25 NM 85.44
3/6/2020 NM 20.82 NM 84.87
3/31/2020 NM 19.89 NM 85.80
3/30/2021 NM 17.26 NM 88.43
3/28/2022 (pre‐MMPE) NM 20.85 NM 84.84
4/1/2022 (post‐MMPE) NM 21.11 NM 84.58
6/3/2022 NM 20.78 NM 84.91
2/17/2016 NM 23.90 NM 80.40
10/4/2017 NM 21.95 NM 82.35
3/21/2019 NM 18.04 NM 86.26
3/2/2020 NM 18.91 NM 85.39
3/6/2020 NM 19.70 NM 84.60
3/31/2020 NM 19.14 NM 85.16
3/30/2021 NM 16.40 NM 87.90
3/28/2022 (pre‐MMPE) NM 19.99 NM 84.31
4/1/2022 (post‐MMPE) NM 28.02 NM 76.28
6/3/2022 NM 20.02 NM 84.28
10/10/22 (pre‐MMPE) NM 22.46 NM 81.84
10/14/2022 (post‐MMPE) NM 29.60 NM 74.70
2/17/2016 NM 20.20 NM 84.22
10/4/2017 NM 21.93 NM 82.49
3/21/2019 NM 17.38 NM 87.04
3/31/2020 NM 18.64 NM 85.78
3/30/2021 NM 15.70 NM 88.72
3/28/2022 (pre‐MMPE) NM 19.31 NM 85.11
4/1/2022 (post‐MMPE) NM 19.36 NM 85.06
6/3/2022 NM 19.57 NM 84.85
10/10/22 (pre‐MMPE) NM 22.18 NM 83.51
10/14/2022 (post‐MMPE) NM 22.70 NM 82.99
3/2/2020 NM 19.38 NM 85.43
3/31/2020 NM 19.13 NM 85.68
1)
2)
3)
4)NM = Not Measured.
TABLE 1
MONITORING WELL CONSTRUCTION INFORMATION AND LIQUID LEVEL DATA
Duke Foster/D&M Market
Incident # 18698
54 Nicks RoadMebane, Caswell County,North Carolina
Notes: 
Top of Casing (TOC) elevations and monitoring well construction information obtained from 5/26/2020 report prepared by S&ME, Inc.
LNAPL ‐ Light Non‐Aqueous Phase Liquid
Groundwater elevation adjusted for LNAPL is [Top of Casing Elevation ‐ Depth to Water] + [LNAPL Thickness * 0.8581]
MW‐1 6/25/2015 105.12235
2 105.69
20‐35
MW‐2 2/17/2016 15‐30 30
104.81
MW‐4 2/17/2016 15‐30 30
AS‐1 2/17/2020 35‐37.5 37.5 2
2 104.42
MW‐3 2/17/2016 15‐30 30 2 104.30

WithersRavenel
Our People. Your Success 

ATTACHMENT A 

NOTICE OF INTENT FOR AIR SPARGE ENHANCED MMPE 

1
Jim Evan Peele
From:Lyndal Butler
Sent:Tuesday, April 28, 2020 2:51 PM
To:Jim Evan Peele
Subject:FW: WI0400541 NOI Duke Foster/ D&M Market Incident #18698
From: Shrestha, Shristi R <[e-mail]>
Sent: Friday, February 28, 2020 10:10 AM
To: Berger, Herb <[e-mail]>; Lyndal Butler <[e-mail]>
Cc: Snider, Lon <[e-mail]>
Subject: WI0400541 NOI Duke Foster/ D&M Market Incident #18698
Thank you for submitting the Notice of Intent to Construct or Operate Injection Wells (NOI) for the above referenced
site.
Please remember to submit the following regarding this injection activity:
1. Well Construction Records (GW-1) and Abandonment Records (GW-30) when completed.Please provide copies of
the GW-1s and GW-30s if not already submitted (originals go the address printed on the form). NOTE: Direct push or
Geoprobe wells are considered wells and require construction (GW-1) and abandonment forms (GW-30). If well
construction/abandonment information is the same for the wells, only one form needs to be completed- just indicate
total number of injection points in the Comments/Remarks section of form.
1)
2. Injection Event Records (IER). All injections, including air and passive systems require an IER. The IER can be
modified for air sparge wells (e.g., air flow ‘continuous’ for date or rate of injection, etc.). The forms can be found under
the following link https://deq.nc.gov/about/divisions/water-resources/water-resources-permits/wastewater-
branch/ground-water-protection/ground-water-applications
When submitting the above forms, you will need to enter the nine-digit alpha-numeric number on the form (i.e.,
WI0XXXXXX) that has been assigned to the injection activity at this site. This notification has been given the deemed
permit number WI0400541.This number is also referenced in the subject line of this email. You may if you wish, scan
and send back as attachments in reply to this email, as it will already have the assigned deemed permit number in the
subject line.
Thank you,
Shristi
Shristi R. Shrestha
Hydrogeologist, Ground Water Resources Section
NCDEQ Division of Water Resources
919-707-3662 office
[e-mail]
512N. Salisbury Street
1636 Mail Service Center
Raleigh, NC 27699 1636
Email correspondence to and from this address is subject to the
North Carolina Public Records Law and may be disclosed to third parties.

WithersRavenel
Our People. Your Success 

ATTACHMENT B 

FIELD NOTES 

WithersRavenel
Our People. Your Success 

ATTACHMENT C 

DISPOSAL MANIFEST AND MMPE CALCULATIONS