WS-2467_3510_CA_RPTS_20190605

S&ME, Inc. | 8646 W Market St, Ste 105 | Greensboro, NC 27409 | p 336.288.7180 | www.smeinc.com

June 5, 2019
NCDEQ, DWM, UST Section, Trust Fund Branch
1646 Mail Service Center
Raleigh, NC 27699-1646
Attention: Mr. Herb Berger , L.G. Submitted via: [e-mail]
Reference: Report of Mobile Multi-Phase Extraction
Needham Service Station/Incident #: 3510; UST #: 2467
719 Main Street, Pilot Mountain, Surry County, North Carolina
S&ME Project No. 4305-17-229A

Dear Mr. Berger:
S&ME, Inc., (S&ME) presents this report in accordance with the North Carolina Department of Environmental
Quality/S&ME Contract No. N17002 and S&ME Proposal No. 43-1700706A, dated January 23, 2019, and as
authorized by Task Authorization No. 02, dated February 12, 2019.
The scope of services included the following. Provide UIC Notification of Intent for proposed air sparge activities.
Provide professional time for site activities. Perform Mobile Multi-phase Extraction (MMPE) on monitor wells MW-
6R, MW-13 and MW-14, and perform periodic air sparging on monitor well MW-2 (Figure 1). Summarize MMPE
activities in a Letter Report. The services were conducted as proposed. Services were delayed until receipt of a
signed Site Access Agreement by the NCDEQ on March 7, 2019.
 Underground Injection Control-Notification of Intent
On March 14, 2019, S&ME submitted the attached Notification of Intent form and supporting information to the
NCDEQ. S&ME received permit number WI0400520 via email on March 27, 2019 (Attachment I).
 Summary of MMPE Event
S&ME performed depth to water measurements on selected monitor wells, on April 22, 2019, and prior to the
MMPE event. Light non-aqueous phase liquid (LNAPL) was measured in monitor well MW-13 at a thickness of
1.00 foot. Measurements in monitor wells not exhibiting LNAPL ranged from 33.83 feet below top of casing in
monitor well MW-12 to 37.44 feet below top of casing in monitor well MW-6R (Table 1). Pre-MMPE groundwater
elevations are shown on Figure 2. Groundwater flow conditions were similar to observations recorded on
November 13, 2018; however, groundwater occurrence ranged from approximately 3 feet to approximately 3.5
feet higher in elevation. Environmental Field Reports dated April 22 and April 26, 2019, are provided in
Attachment II.
Advanced Environmental Services, Inc., (Advanced) conducted a 96-hour MMPE event using monitor wells MW-6R,
MW-13 and MW-14, from April 22 to April 26, 2019. Air-sparging was performed on monitor well MW-2 for on
N016080 (IN FEET)GRAPHIC SCALE (IN FEET)GRAPHIC SCALESOURCE: SITE BASE MAP DEVELOPED FROM 2014 AERIAL PHOTOGRAPH.LEGEND- MONITORING WELL LOCATION- UNDERGROUND STORAGE TANKUSTFORMERUSTBASINFORMERNEEDHAM'SSERVICESTATIONSITEHURSTGARAGEFORMERDISPENSER ISLANDMAIN STBLDGBLDGBLDGMW-10MW-11MW-9MW-8MW-7MW-5MW-3MW-2MW-6RMW-1RMW-13MW-14MW-12FIGURE NO.SCALE:DATE:PROJECT NUMBER1 PILOT MOUNTAIN, SURRY COUNTY, NORTH CAROLINA719 EAST MAIN STREETNEEDHAM SERVICE STATIONAS SHOWNMAY 20194305-17-229ASITE MAP(Site ID: 3510)
FIGURE NO.Drawing path: Q:\4305\2017\17-229 - NEEDHAM SERVICE STATION\5-19\Needham Figures.dwg
PROJECT NUMBERDATE:SCALE:N060120 (IN FEET)GRAPHIC SCALE (IN FEET)GRAPHIC SCALENEEDHAM SERVICE STATION
719 EAST MAIN STREET
PILOT MOUNTAIN, SURRY COUNTY, NORTH CAROLINAMAY 2019GROUNDWATER CONTOUR MAP
(Site ID: 3510)AS SHOWN4305-17-229ALEGEND- MONITORING WELL LOCATION- UNDERGROUND STORAGE TANK- GROUNDWATER CONTOUR- MEASURED GROUNDWATER ELEVATION- NOT MEASURED- GROUNDWATER FLOW DIRECTIONUST(66.25)SOURCE: SITE BASE MAP DEVELOPED FROM 2014 AERIAL PHOTOGRAPH.FORMERUST BASINFORMERNEEDHAM'SSERVICESTATIONSITEHURSTGARAGEFORMERDISPENSERISLANDMAIN STBLDGBLDGBLDGMW-10MW-11MW-9MW-8MW-7MW-5MW-3MW-2MW-6RMW-1RMW-13MW-12(NM)(63.98)(64.06)(64.47)(66.25)(NM)(NM)(NM)(NM)(63.92)(NM)(NM)(NM)(NM)MW-1464.065.066.0NOTE: MONITORING WELLS GROUNDWATER MEASURED ON APRIL 22, 20192
TABLE 1
WELL CONSTRUCTION AND LIQUID LEVEL DATA
Pilot Mountain, Surry County, North Carolina
S&ME Project # 4305-17-229A
UST Facility ID # 0-00-000008029 Revision Date: 5/08/2019
Well
ID
Date
Installed
Date
Water Level
Measured
Well
Casing
Depth
(ft BGS)
Well
Casing
Diameter
(in)
Depth
of Well
(ft-BGS)
Top of
Casing
Elevation*
(ft)
Depth to
Water
from Top
of Casing
(ft)
Free
Product
Thickness
** (ft)
Groundwater
Elevation*
(ft)
Latitude
(decimal)
Longitude
(decimal)
11/20/2008 38.28 0.00 61.721/5/2010 36.79 0.00 63.2110/15/2010 35.10 0.00 64.905/24/2011 36.16 0.00 63.842/22/2012 36.52 0.00 63.489/19/2012 36.42 0.00 63.583/13/2015 36.59 0.00 63.4111/20/2008 41.16 0.00 59.681/5/2010 39.68 0.02 61.16
10/25/2010 37.00 0.00 63.84
5/24/2011 39.03 0.00 61.81
2/23/2012 39.87 0.00 60.97
9/19/2012 39.79 0.00 61.05
4/14/2014 37.97 0.00 62.87
3/13/2015 39.45 0.00 61.39
11/13/2017 39.87 0.00 60.974/22/2019 36.86 0.00 63.9811/20/2008 36.85 0.00 63.47
1/5/2010 25.49 0.00 74.83
10/25/2010 24.95 0.00 75.37
5/24/2011 14.09 0.00 86.23
2/23/2012 2.81 0.00 97.51
9/19/2012 27.58 0.00 72.74
3/13/2015 25.63 0.00 74.6911/20/2008 39.34 0.00 58.721/5/2010 37.86 0.00 60.20
10/15/2010 36.40 0.00 61.66
5/11/2011 37.22 0.00 60.84
2/22/2012 37.87 0.00 60.19
9/19/2012 38.09 0.00 59.97
4/14/2014 36.09 0.00 61.97
11/20/2008 41.89 0.14 59.471/5/2010 40.46 0.11 60.9010/25/2010 39.13 0.00 62.23
5/24/2011 39.62 0.00 61.74
2/22/2012 40.21 0.00 61.15
9/19/2012 40.53 0.00 60.83
4/14/2014 38.63 0.00 62.73
3/13/2015 40.18 0.00 61.18
11/13/2017 40.87 0.00 60.49
4/22/2019 37.44 0.00 63.9211/20/2008 43.63 0.00 58.571/5/2010 40.98 0.00 61.22
10/15/2010 41.00 0.00 61.20
5/11/2011 41.38 0.00 60.82
2/22/2012 42.18 0.00 60.02
9/19/2012 42.50 0.00 59.70
4/14/2014 40.37 0.00 61.83
3/13/2015 42.14 0.00 60.0611/13/2017 41.92 0.00 60.2811/20/2008 43.55 0.00 57.73
1/5/2010 41.09 0.00 60.19
10/25/2010 41.14 0.00 60.14
5/11/2011 41.83 0.00 59.45
2/22/2012 41.99 0.00 59.29
9/19/2012 42.55 0.00 58.73
4/14/2014 39.98 0.00 61.30
11/13/2017 43.12 0.00 58.1611/20/2008 27.74 0.00 51.66
1/5/2010 25.91 0.00 53.49
10/25/2010 26.11 0.00 53.29
5/11/2011 26.69 0.00 52.71
2/23/2012 26.25 0.00 53.15
9/19/2012 27.22 0.00 52.18
4/14/2014 24.56 0.00 54.84
3/13/2015 26.37 0.00 53.0311/13/2017 27.44 0.00 51.9611/20/2008 40.01 0.00 58.79
1/5/2010 38.54 0.00 60.26
10/15/2010 37.00 0.00 61.80
5/24/2011 38.12 0.00 60.68
2/22/2012 38.74 0.00 60.06
9/19/2012 38.70 0.00 60.10
11/20/2008 7.46 0.00 43.921/5/2010 6.15 0.00 45.2310/25/2010 7.17 0.00 44.21
5/11/2011 6.57 0.00 44.81
2/23/2012 6.55 0.00 44.83
9/19/2012 7.87 0.00 43.51
3/13/2015 36.54 0.00 63.54
11/13/2017 37.05 0.00 63.03
4/22/2019 33.83 0.00 66.25
3/13/2015 40.10 0.64 61.4511/13/2017 41.07 0.89 60.694/22/2019 37.82 1.00 64.04
4/26/2019 38.78 0.00 62.22
3/13/2015 38.78 0.00 62.01
11/13/2017 39.52 0.00 61.27
4/22/2019 36.32 0.00 64.47
NOTES:
* : Reference Point for Elevation Measurements:Benchmark Datum:Benchmark Elevation: 100.00 ft
Assumed or Measured:
** : If Free Product is present in a well, groundwater elevation should be calculated by: [Top of Casing Elevation - Depth to Water] + [free product thickness x 0.8581]
ft-BGS = feet below ground surface NM = Not Measured NA = Not Applicable
ND = Not Detected NG = Not Gauged
05/21/07
03/12/15
03/12/15
03/12/15
1/17/05
11/11/87
11/11/87
1988
Aug-04
1988
1988
1988
1/17/2005
100.08
101.00
100.79
51.38
102.20
101.28
79.40
98.80
18.8
45
37.5
45.5
54.5
28 - 43
31 - 46
31 - 46 46.3
45.8
43.9
44 - 54
42 - 52
Unknown
30 - 45
Unknown
28
31
31
2
2
2
2
2
2
2
2
2
35
44
42
Unknown
30
35 2 35 - 50 49.3
50 101.36
Unknown
100.32
98.06
36.5 4 36.5 - 54
52.3
49.2
41.5 2 41.5 - 51.5 49.7
35 - 50
MW-1R top of casing
Measured
MW-14
36.38279722 -80.45361111
36.38261944 -80.45333333
36.38241667 -80.45333333
36.38273611 -80.45277778
36.38268611 -80.45333333
36.38287500 -80.45305556
36.38326667 -80.45361111
36.38256111 -80.45333333
NM NM
36.38307500 -80.45305556
36.38262222
Needham Service Station, (Incident No.: 3510, UST #: WS-2467)
Screen
Interval
(ft-BGS)
MW-1R
MW-13
MW-12
MW-11
MW-9
MW-8
MW-10
MW-3
MW-5
MW-7
MW-2
MW-6R
36.38298056 -80.45305556
-80.45555556
36.38330278 -80.45277778
100.00
44.5 4 44.5 - 54.5 100.84
Page 1 of 1

Attachment I – Notification of Intent Form and UIC Permit Number

Attachment II – Environmental Field Reports and MMPE Report

Hours Mileage Signature of S&ME Personnel
6.0 100

S&ME, Inc. | www.smeinc.com
Environmental Field Report
Date:
4/22/19
Job Number:
4305-17-229A
Project Name:
Needham Service Station
Weather/Temperature:
Sunny, 72 °F
Project Location:
719 Main Street, Pilot Mountain, North Carolina
Notes By:

Present at the Site:
Gary Simcox
Lee Heilig and Scott (AES)

On site to collect water product levels and monitor MMPE set up and start. I arrived on site and opened all wells to
let levels equilibrate. I had to walk across the street to Pilot Heating and Air and get an employee to move his car
before AES arrived to set up equipment. AES arrived on site at approximately 1030 hours. The MMPE started at
approximately 1205 hours. They will monitor the equipment several times a day and get water levels in MW-12.
They set up the vacuum on wells MW-6R, MW-13 and MW-14. Sparging will start tomorrow at MW-2.
Well Product Water
MW-2 n/d 36.86
MW-6R n/d 37.44
MW-12 n/d 33.83
MW-13 36.82 37.82
MW-14 n/d 36.32

Attachments:

Equipment Used
Oil/Water interface meter

Hours Mileage Signature of S&ME Personnel
6.0 100

S&ME, Inc. | www.smeinc.com
Environmental Field Report
Date:
4/26/19
Job Number:
4305-17-229A
Project Name:
Needham Service Station
Weather/Temperature:
Cloudy, Rain, 72 °F
Project Location:
719 Main Street, Pilot Mountain, North Carolina
Notes By:

Present at the Site:
Gary Simcox
Lee Heilig and Scott (AES)

On site to observe the end of MMPE event, break down and clean up. AES sparged at MW-2 on
Tuesday,Wednesday and Thursday for approximately eight hours each day.
The vacuum blower was shut off today at approximately 1215 hours. The total amount of liquid recovered was
4560 gallons. The amount of free product was 75 gallons.
Zebra Environmental was on site to pump out and haul off the recovered liquids.
Note: While on site today, I used the metal detector to locate MW-1.

Attachments:

Equipment Used

ADVANCED
ENVIRONMENTAL SERVICES, INC.
“Your Environmental Solutions Partner”

MOBILE
MULTI-PHASE
EXTRACTION REPORT

Site Location:

Needham’s Service Station
719 East Main St.
Pilot Mountain, NC

Prepared for:

S&ME, Inc.
8646 West Market Street, Suite 105
Greensboro, NC 27409
PM – Lyndal Butler

May 8, 2019

TABLE OF CONTENTS

EVENT SUMMARY

MMPE FIELD LOG

MASS-REMOVAL CALCULATION

FIELD NOTES

DISPOSAL MANIFESTS

MOBILE MULTI-PHASE EXTRACTION
EVENT SUMMARY

May 8, 2019
Location: Needham’s Service Station
719 East Main St.
Pilot Mountain, NC

Client: S&ME, Inc.
8646 West Market Street, Suite 105
Greensboro, NC 27409
PM – Lyndal Butler

Event Dates: April 22 – 26, 2019
Advanced Job # 04 - 1920

Advanced Personnel: Scott Crook and Lee Heilig

MMPE System: MMPE system rated 21”hg at 130 CFM
8’ discharge stack - 2” diameter
5,800 - gallon tanker
150’ of 1.5” hose to 3 wells

Extraction Well: MW-6R, MW-13 and MW-14

Well Initial FP / WL(ft) Final FP / WL(ft) Stinger depth(ft) Run Time
/Changed to
MW-6R 37.44 37.28 38 96.0 hours
MW-13 36.82/37.82 38.78 38 96.0 hours
MW-14 36.32 36.11 37 96.0 hours

Description of Event:
The MMPE event ran from 12:15 April 22 to 12:15 April 26, 2019. The MMPE system was
active for 96.0 hours. During the event vacuum at the recovery pump ranged from 11.0 to 13.0
inches of mercury (hg) and stabilized at approximately 11.5 inches of mercury. Airflow rates
ranged from 3,900 to 4,300 feet per minute and stabilized at approximately 4,200 feet per
minute. System temperature ranged from 90 – 108 degrees F and humidity maintained 99
percent. Field gauged volatile organic compounds (VOC’s) decreased from 34,000 to 14,000
parts per-million (PPM) throughout the event.

Groundwater / Product Mix Recovered:
During the event a total of 4,560 gallons of product/water mix were removed from the site and
properly disposed at a certified North Carolina disposal facility. Approximately 92 gallons of
free product was recovered as liquid. Total fluids recovered, was measured based on stick
readings conducted during and following the event. Based on 96.0 hours of operation and a total
of 4,560 gallons recovered, the average groundwater recovery rate was calculated to be
approximately 47.50 gallons per hour.

Events Results:
Based on mass-removal calculations 428.27 pounds or 69.61 gallons of VOC’s were removed as
vapor. Using Dwyer Magnahelic Gauges vacuum influence was measured at MW-12. No
influence was recorded at MW-12. No Draw down was identified at MW-12. Following the
event no free product was identified in any well.

MMPE FIELD LOG:
CLIENT: S&ME Inc.
JOB NAME: Needham's Service Station
LOCATION: Pilot Mountain, NC
MMPE EVENT DATES: April 22 - 26, 2019
EXTRACTION POINTS: MW-6R, MW-13 and MW-14
AES JOB NUMBER: 04 - 1920
DATE TIME FLOW (f/m) HUM.(%) TEMP. (F)VOC's(ppm)VAC. (hg")GALLONS STINGER/WL's EXTRACTION POINTS (hg")
MW-6R MW-13 MW-14
Stinger(ft)38 38.0 37
Start 12:15 Initial WL's 37.44 36.82/37.82 36.32

04/22/19 12:40 4,000 99 90 34,000 13.0 8.0 8.0 8.0
13:20 4,000 99 92 34,000 13.0 8.0 8.0 8.0
18:10 4,000 99 94 32,000 13.0 360 gal. 8.0 8.0 8.0
18:50 4,300 99 98 29,000 11.0 7.0 7.0 7.0
04/23/19 8:50 4,300 99 106 26,000 11.0 1,050 gal.7.0 7.0 7.0
11:30 4,300 99 108 26,000 11.0 7.0 7.0 7.0
19:20 4,300 99 104 28,000 11.0 7.0 7.0 7.0
20:10 4,300 99 104 28,000 11.0 7.0 7.0 7.0
04/24/19 8:30 4,300 99 102 22,000 11.0 2,160 gal.7.0 7.0 7.0
9:30 4,300 99 102 22,000 11.0 7.0 7.0 7.0
17:50 4,300 99 104 19,000 11.0 7.0 7.0 7.0
18:40 4,300 99 104 19,000 11.0 7.0 7.0 7.0
04/25/19 8:50 4,300 99 104 17,000 11.0 3,120 gal.7.0 7.0 7.0
10:10 4,300 99 104 18,000 11.0 7.0 7.0 7.0
17:30 4,300 99 104 17,000 11.0 7.0 7.0 7.0
18:40 4,300 99 104 17,000 11.0 7.0 7.0 7.0
04/26/19 7:40 4,300 99 102 14,000 11.0 4,110 gal.7.0 7.0 7.0
10:50 3,900 99 96 14,000 13.0 8.0 8.0 8.0

END 12:15 Total fluids: 4,560 gal.Final WL's 37.28 38.78 36.11
Total free product:92 gal.
DATE TIME STINGER/WL's EXTRACTION POINTS (hg") cont. VACUUM INFLUENCE (h2o") WELL GAUGING (ft)
MW-12 MW-12
Start Stinger(ft)
Initial WL's

04/22/19 12:15 0.00 33.83

04/23/19 9:10 0.00 33.83

04/24/19 9:00 0.00 33.83

04/25/19 9:30 0.00 33.83

04/26/19 10:50 0.00 33.83

END 12:15 Final WL's
Page 1 of 1
MOBILE MULTI-PHASE EXTRACTION EVENT
SITE NAME: Needham's Service Station CLIENT: S&ME
INCIDENT NUMBER:
AVERAGE DEPTH TO GROUNDWATER: 36 - 38 feet
DESCRIBE SOIL IN THE SATURATED ZONE:
AVERAGE HYDRAULIC CONDUCTIVITY (if known):
EXTRACTION WELLS USED FOR MMPE: MW-6R, MW-13 and MW-14
SPECIFICATIONS OF THE MMPE SYSTEM (cfm @ in Hg): 130 cfm @ 21.0"Hg
DRY STANDARD CUBIC FEET PER MINUTE (DSCFM) AIR FLOW CALCULATIONS (Qstd)
Date Hours Vacuum Velocity Pipe ID Temp Rel Humid Water Water Qstd(inches of Hg)(ft/min)(in)(°F)(%)Vapor (Wt%)Vapor (Vol%)(flow)
4/22/19 24.00 12.50 4075.00 2 94 99.9 0.034 0.052 80
4/23/19 48.00 11.00 4300.00 2 106 99.9 0.051 0.076 81
4/24/19 72.00 11.00 4300.00 2 103 99.9 0.047 0.070 82
4/25/19 96.00 11.50 4200.00 2 102 99.9 0.045 0.067 80
4/26/19
NOTES
Qstd = Flow at DSCFM
Vacuum = The level of vacuum being applied should be recorded from the MMPE system (inches of Hg)
Velocity = The rate at which air flows is measured at the blower discharge piping (anemometer or pitot tube)
Pipe ID = The inside diameter of the blower discharge piping (from the MMPE system)
Temperature = The temperature of the air stream exiting the blower discharge piping (dry bulb temp., in deg.°F)Relative humidity = The % relative humidity of the air stream exiting the blower discharge piping
Bwsw = water vapor % by weight, i.e., pounds of water per pound of dry air, derived from the Psychrometric chart (temp Vs relative humidity)
Bws = water vapor % by volume
EQUATIONS
Bws = (Bwsw/18 lb-mole H20)/[(1/28.84 lb-mole dry air) + (Bwsw/18 lb-mole H2O)]Qstd = (1-Water Vapor) * velocity * (PI * (diameter/24)2) * (528°R/(Temp + 460))
EMISSION CALCULATIONS
Elapsed
Time Flow PPMmeasured PPMwet PPMdry K PPMconc Cc:m Cc PMRc PMRg PMR
(hour)(DSCFM)(ppm)(#C - gas)(mg/dsm3)(lb/dscf)(lb/hour)(lb/hour)(lb)
24 80 32250 32250 34007 1 34007 16968 0.001059318 5.11 5.92 141.98
48 81 27000 27000 29206 1 29206 14573 0.00090978 4.42 5.12 122.77
72 82 20500 20500 22044 1 22044 10999 0.000686666 3.37 3.90 93.63
96 80 15625 15625 16752 1 16752 8358 0.000521814 2.52 2.91 69.89
Total emissions in pounds 428.27
Total emissions as gallons (pounds / 6.152)69.61
NOTES
PPMmeasured = Actual measurements (ppm) taken with a OVA or TVA at the blower discharge piping
PPMwet = "wet" concentration
PPMdry = "dry" concentration
K = Number of carbons in calibration gas: (Methane K = 1, or Propane K = 3, or Hexane K = 6)
PPMc= PPMv, Volumetric concentration of VOC emissions as carbon, dry basis at STP
Cc:m = mg/dsm3, mass concentration of VOC emissions as carbon
Mc = 12.01 mg/mg-mole, molecular weight of carbon
K3 = 24.07 dsm3/106 mg-mole, mass to volume conversion factor at STP
Cc = lb/dcsf, mass concentration of VOC emissions as carbon, dry basis at STP
PMRc = lb/hr, pollutant mass removal rate of VOC's as carbon
PMRg = lb/hr, pollutant mass removal rate of of VOC's as gasolinePMR = lb, pollutant mass removal of VOC's as gasoline
EQUATIONS
PPMwet = PPMmeasuredPPMdry = (PPMwet)/(1-Bws)
PPMc = (PPMd)(K)
Cc:m = (PPMc)(Mc / K3)Cc = (Cc:m)(62.43x10-9 lb-m3/mg-ft3)
PMRc = (Cc)(Qstd)(60 minute/hour)
PMRg = (PMRc)(Mg/Mcg)
PMR = (PMRg)(#hours)