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AGGRESSIVE FLUID VAPOR RECOVERY REPORT
BRUSH CREEK ELEMENTARY SCHOOL
265 UPPER BRUSH CREEK ROAD
MARSHALL, NORTH CAROLINA 28753
NCDENR INCIDENT NO. 41260
MSGS PROJECT NUMBER: MC19-01
Prepared for
Madison County Board of Education
5738 US 25
Marshall, North Carolina 28753
December 2020
MARTIN&SLAGLE
GeoSciences, PA
AGGRESSIVE FLUID VAPOR RECOVERY REPORT
BRUSH CREEK ELEMENTARY SCHOOL
MADISON COUNTY BOARD OF EDUCATION
265 UPPER BRUSH CREEK ROAD
MARSHALL, NORTH CAROLINA 28753
NCDENR INCIDENT NO. 41260
MSGS PROJECT NUMBER: MC19-01
Prepared by:
Martin&Slagle GeoSciences, PA
PO Box 1023
Black Mountain, North Carolina 28711
(828) 669-3929
FAX (828) 669-5289
December 2020
Brush Creek Elementary School, Madison County, NC
Aggressive Fluid Vapor Recovery Report, December 2020
Incident #41260
1
INTRODUCTION
Martin & Slagle GeoSciences, P.A. (MSGS) was retained by Madison County Board of Education
to provide environmental consulting services associated with a release of heating oil from
product lines associated with a commercial underground storage tank (UST) system located at
Brush Creek Elementary School, 265 Upper Brush Creek Road, Marshall, North Carolina.
This report documents the results of three Aggressive Fluid Vapor Recovery (AFVR) events
completed on May 7, June 18, and July 16, 2020 at the school. The release has been assigned
Incident Number 41260 by the North Carolina Department of Environmental Quality (NCDEQ),
UST Section. To date, following reports have been submitted to NCDEQ:
• Limited Site Assessment (LSA), January 2017;
• Comprehensive Site Assessment (CSA), March 2018;
• Mobile Multi-Phase Extraction (MMPE) and Vapor Intrusion (VI) Results, February
2019;
• Vapor Intrusion Assessment, September 2019;
• Aggressive Fluid Vapor Recovery Report, October 2019.
• Aggressive Fluid Vapor Recovery Report, March 2020.
NCDEQ UST Section issued a Notice of Regulatory Requirements (NORR) for this incident
on March 18, 2020 directing the responsible party to conduct monthly AFVR events at
the site. A copy of the NORR is included in Appendix A.
A. SITE INFORMATION
The following sections provide information regarding the project site’s location, UST system,
contact information, and known details relating to the release. A vicinity map is provided as
Figure 1, and a site map is provided as Figure 2.
Brush Creek Elementary School, Madison County, NC
Aggressive Fluid Vapor Recovery Report, December 2020
Incident #41260
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A.1 Site Identification
Report Date: December 16, 2020
Facility ID: N/A
UST Incident No.: 41260
Site Name: Brush Creek Elementary School
Site Street Address: 265 Upper Brush Creek Road
City/Town: Marshall
Zip Code: 28753
County: Madison
A.2 UST System Contact Information
UST Owner: Madison County Board of Education
5738 US Highway 25-70
Marshall, NC 28753
828-649-2424
UST Operator: Madison County Board of Education
Property Owner: Madison County Board of Education
Property Occupant: Madison County Board of Education
Brush Creek Elementary School
Consultant: Martin & Slagle GeoSciences, PA
PO Box 1023
Black Mountain, NC 28711
828-669-3929
Brush Creek Elementary School, Madison County, NC
Aggressive Fluid Vapor Recovery Report, December 2020
Incident #41260
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Laboratory: Pace Analytical Services, LLC
2225 Riverside Drive
Asheville, NC 28804
A.3 Release Information
On September 16, 2014, free-product heating oil was observed in a drainage ditch behind the
school gymnasium and cafeteria by school employees. Approximately 4,000 to 5,000 gallons of
fuel oil were estimated to have been released from a compromised buried fuel line associated
with a heating oil UST. Initial emergency response efforts recovered approximately 1,500 gallons
of fuel by vacuuming free product from the water table from temporary wells and from the
surface water in the drainage ditch. Sorbent booms were installed on the surface water where
oil was discharging. The drainage ditch leads to a constructed wetland maintained and
monitored by students at the school.
Certification
I, Robert L. Martin, a Licensed Geologist for Martin & Slagle, GeoSciences, PA, do certify
that the information contained in this report is correct and accurate to the best of my
knowledge.
________________________________
Robert L. Martin, LG
Principal Geologist
NC Licensed Geologist No. 391
Martin & Slagle, GeoSciences, PA is licensed to practice geology in North Carolina. The
certification number of the company or corporation is C-375.
12/16/20
Brush Creek Elementary School, Madison County, NC
Aggressive Fluid Vapor Recovery Report, December 2020
Incident #41260
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B. EXECUTIVE SUMMARY
To date, MSGS has completed 14 eight-hour AFVR events and one 96-hour Mobile Multiphase
Extraction (MMPE) event since submittal of the CSA report on March 30, 2018 to aggressively
remove fuel oil free product from the subgrade at Brush Creek Elementary School.
Two two-inch diameter monitoring wells and three four-inch diameter recovery wells are located
within the free product plume. The three four-inch diameter recovery wells were installed on
the site within the free product plume to a depth of 12.5 feet below ground surface prior to
conducting the MMPE.
The three most recent AFVR events were conducted on May 7, June 18, and July 16, 2020 at the
school. The events ran for eight hours each. Data collected during the events were entered into
a spreadsheet which calculated the total vapor emissions in pounds of vapor and liquid quantity
in gallons. The three most recent AFVRs recovered a total of 1,150 gallons of combined water
and product, 68.25 gallons of free product, and 46.79 lbs. of vapor emissions equivalent to 7.49
gallons of free product.
The cumulative total volume of free product recovered since the release is 2,447.75 gallons. This
event recovered slightly less free product than the last (75.74 gallons vs. 76.75 gallons). AVFR
remains the more effective method for free product recovery at this site when evaluated against
the MMPE results from 2018. Approximately 955 gallons of free product have been recovered
by pumping the recovery trench (July 2015), and the AFVR and the MMPE events conducted since
the emergency response activities.
Groundwater monitoring and groundwater level gauging conducted in May 2020 indicated that
the areal extent of free-product plume is shrinking. The amount of product recovery remains
consistent with each event Approximately 50% of the estimated free product has been
recovered. MSGS recommends continuation of the AFRV events on a monthly basis for the next
three months.
Brush Creek Elementary School, Madison County, NC
Aggressive Fluid Vapor Recovery Report, December 2020
Incident #41260
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C. TABLE OF CONTENTS
INTRODUCTION……………………………………………………………………………………………………………….1
Section A Site Information………………………...………….………………………………………………….1
Section B Executive Summary…….…………………………………………………………………………….4
Section C Table of Contents……………………………………………………………………………………..5
Section D Free Product Recovery.………………….……………….………………………………………..6
Section E Conclusion and Recommendations..………………………………………………………...8
Figures
Figure 1 – Vicinity Map
Figure 2 – Site Map
Tables
Table 1 – Free Product Recovery Information
Table 2 – Cumulative Volume of Free Product Recovered from Site
Table 3- Current and Historical Groundwater Elevations and Free Product Thickness
Appendices
Appendix A – NORR
Appendix B – AFVR Spreadsheets and Waste Disposal Manifests
Brush Creek Elementary School, Madison County, NC
Aggressive Fluid Vapor Recovery Report, December 2020
Incident #41260
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D. FREE PRODUCT RECOVERY
Background
Free-product recovery efforts have been on-going since the release was discovered. Free
product was initially measured in the source area at depths up to three feet thick on the water
table. A total of 14,920 gallons of mixed water/oil fluid and 2447.75 gallons of free product
were recovered during emergency response activities, interceptor trench recovery, 14 AFVR
events and one MMPE event. The AFVR recovery totals are summarized below:
Event Date Total Recovery (Gallons) Total Free Product Incl Vapor (Gallons)
10/21/16 1530 94
11/30/16 641 110
06/02/17 500 51
09/29/17 850 157
03/16/18 550 86
06/21/19 500 19.33
07/19/19 300 26.06
08/16/19 1300 27.91
10/25/19 400 51.07
11/22/19 400 12.61
12/16/19 426 13.07
05/07/20 300 19.25
06/18/20 250 18.83
07/16/20 600 37.66
7397 723.79
Product has not been observed in MW-04 since the AFVR conducted on October 21, 2016. The
free-product plume has retreated from MW-04 and appears to be limited to the area around
MW-02, MW-03 and RW-03. The interceptor trench installed in 2015 was purged of fluid on
Brush Creek Elementary School, Madison County, NC
Aggressive Fluid Vapor Recovery Report, December 2020
Incident #41260
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March 16, 2018 but has not been used for product recovery since then due to the high
groundwater levels.
On August 6 through 10, 2018 a 96-hour MMPE event was conducted on three four-inch
diameter monitoring wells which were installed on the site within the free product plume.
Figure 2 shows the locations of the monitoring and recovery wells. A total of 5,173 gallons of a
mixture of groundwater and fuel oil recovered during the MMPE event were transported from
the site and properly disposed of at VLS Recovery Services, LLC in Lexington, SC. The MMPE
process did not recover a significant amount of free product. A total of 9.06 lbs. or 1.45 gallons
of hydrocarbon emissions and about 30 gallons of free product (based on measurements in the
tanker) were recovered.
AFVR Results
Three AFVR events were conducted on May 7, June 18, and July 16, 2020 at Brush Creek
School. Prior to beginning the event, product was measured in wells within the free product
plume. The two wells selected for each event that had the greatest depth of free product
measured at the time of extraction. In each of the three events, the vacuum lines were
connected to monitoring wells MW-2 (during the October 25 event), MW-3 (all events) and
recovery well RW-1 (May 7 event) and RW-2 (June 18 and July 16 events).
The events ran for eight hours each. Air velocity, relative humidity, temperature and vapor
concentration were recorded each hour during operation. At the end of the day recovered
water and product levels were measured in the vacuum truck tank. Data collected during the
event were entered into a spreadsheet which calculated the total vapor emissions in pounds of
vapor and liquid quantity in gallons. Table 1, Table 2 and Table 3 summarize the recovery data
for the AFVR and MMPE events. The emission data spreadsheets are included in Appendix B.
Brush Creek Elementary School, Madison County, NC
Aggressive Fluid Vapor Recovery Report, December 2020
Incident #41260
8
Results
The three most recent AFVRs recovered a total of 1,150 gallons of contaminated water, 68.25
gallons of free product, and 46.79 lbs. of vapor emissions equivalent to 7.49 gallons of free
product. The cumulative total volume of free product recovered since the release is 2,447.45
gallons.
E. CONCLUSIONS AND RECOMMENDATIONS
The most recent AVFRs recovered slightly less free product than the previous three events. This
method remains effective for free product recovery at this site when evaluated against the MMPE
results from 2018. MSGS recommends continuing the AFRV events on a monthly basis for at least
the next three months. During the next three months, other recovery methods should be
evaluated to determine if they may be more effective than AFVRs.
FIGURE 1PREPARED FOR: Madison County Schools
DATE: 9/15/20
DR: RLM
CHK:RLM
VICINITY MAP
Brush Creek Elementary School
Marshall, NC
MARTIN&SLAGLE
GeoSciences, PA
PO Box 1023
Black Mountain, NC 28711
828.669.3929 828.669.5289
2
Subject Site
GeoSciences, PA
PO Box 1023
Black Mountain NC 28711
828.669.3929
MARTIN&SLAGLE
DR: RLM
CHK: CES
PREPARED FOR:SCALE: 1”=50’ (APPROX.)
DATE: 9/15/20
SITE MAP
5/25/20
Brush Creek Elementary School
Marshall, NC
FIGURE 2
GYMNASIUM
STORAGE
BUILDING
STUDENT ENTRANCE
OFFICECLASSROOMS
PARKING
EXISTING UST
BOILER
ROOM
(SOURCE AREA)
STUDENT WETLANDS PROJECT
PARKING
CAFETERIA
MW-1
MW-4
MW-3
INTERCEPTOR
TRENCH
FUEL OIL DISCHARGE TO
DRAINAGE SWALE
0 25 50
SCALE
(APPROX.)
MW-06
MW-07
MW-05
Madison County
Board of
Education
MW-05 Monitoring Well
LEGEND
Free Product Plume 3/16/18
Free Product Plume 12/2/16
RW-1
RW-2
MW-2 RW-3
Free Product Plume 5/25/20
Table 1: Free Product Recovery Information
Revision Date: 12/15/20
Incident Number and Name: 41260, Brush Creek Elementary School
Date Well ID # Prod.
Type
Free
Product
Recovery
Method*
Product
Thickness
before
Recovery
(feet)
Product
Thickness
after
Recovery
(feet)
Amount
of
Vaporized
Product
Amount
of Liquid
(Water
and
Product)
TOTAL
Amount
of Liquid
Product
TOTAL
Total
Amount of
Product
Recovered
(gallons)
10/21/16 MW-02 Fuel Oil AFVR 3.15 0.48 NM * * *
10/21/16 MW-03 Fuel Oil AFVR 1.54 0.02 NM * * *
10/21/16 MW-04 Fuel Oil AFVR 0.6 0 NM * * *
10/21/16 All Wells Fuel Oil AFVR -- -- -- 1530 94 94
11/30/16 MW-02 Fuel Oil AFVR 2.9 0.57 NM * * *
11/30/16 MW-03 Fuel Oil AFVR 1.14 0.10 NM * * *
11/30/16 MW-04 Fuel Oil AFVR <.02 -- NM * * *
11/30/16 All Wells Fuel Oil AFVR -- -- NM 641 110 110
6/2/17 MW-02 Fuel Oil AFVR 1.48 0.22 - * * *
6/2/17 MW-03 Fuel Oil AFVR 1.13 0.15 -- * * *
6/2/17 All Wells Fuel Oil AFVR -- -- -- 500 51 51
9/29/17 MW-02 Fuel Oil AFVR 2.23 0.02 -- * * *
9/29/17 MW-03 Fuel Oil AFVR 1.25 0.0 -- * * *
9/29/17 All Wells Fuel Oil AFVR -- -- -- 850 157 157
3/16/18
MW-02
(See note
1.)
Fuel Oil AFVR 0.45 0.06 -- * * *
Date Well ID # Prod.
Type
Free
Product
Recovery
Method*
Product
Thickness
before
Recovery
(feet)
Product
Thickness
after
Recovery
(feet)
Amount
of
Vaporized
Product
Amount
of Liquid
(Water
and
Product)
TOTAL
Amount
of Liquid
Product
TOTAL
Total
Amount of
Product
Recovered
(gallons)
3/16/18 MW-03 Fuel Oil AFVR 1.1 0 * * * *
8/6-
8/10/18 RW-1 Fuel Oil MMPE 0 * * * *
8/6-
8/10/18 RW-2 Fuel Oil MMPE 0 * * * *
8/6-
8/10/18 RW-3 Fuel Oil MMPE 0 * * * *
8/6-
8/10/18 MW-2 Fuel Oil Measure-
ment 0.08 0 -- -- -- --
8/6-
8/10/18 MW-3 Fuel Oil Measure-
ment 1.03 0.52 -- -- -- --
10/3/18 MW-2 Fuel Oil Measure-
ment 0.22 -- -- -- -- --
10/3/18 MW-3 Fuel Oil Measure-
ment 0.52 -- -- -- -- --
10/3/18 RW-1 Fuel Oil Measure-
ment 0.16 -- -- -- -- --
10/3/18 RW-2 Fuel Oil Measure-
ment 0.55 -- -- -- -- --
10/3/18 RW-3 Fuel Oil Measure-
ment 0.05 -- -- -- -- --
10/30/18 MW-2 Fuel Oil Measure-
ment 1.74 -- -- -- -- --
10/30/18 MW-3 Fuel Oil Measure-
ment 0.6 -- -- -- -- --
10/30/18 RW-1 Fuel Oil Measure-
ment 0.04 -- -- -- -- --
10/30/18 RW-2 Fuel Oil Measure-
ment 1.19 -- -- -- -- --
10/30/18 RW-3 Fuel Oil Measure-
ment -- -- -- -- -- --
6/21/19 MW-3 Fuel Oil AFVR 0.39 -- 1.33 500 18 19.33
6/21/19 RW-2 Fuel Oil AFVR 1.16 0.10 -- -- --
7/19/19 MW-3 Fuel Oil AFVR 0.64 -- 5.06 300 21 26.06
7/19/19 RW-2 Fuel Oil AFVR 0.26 --
8/16/19 MW-3 Fuel Oil AFVR 0.87 0.18 3.91 1300 24 27.91
8/16/19 RW-2 Fuel Oil AFVR 0.41 --
10/25/19 MW-2 Fuel Oil AFVR 0.33 0.02 12.07 400 39 51.07
10/25/19 RW-2 Fuel Oil AFVR 0.25 --
11/22/19 MW-3 Fuel Oil AFVR 0.73 0.01 6.61 400 6 12.61
11/22/19 RW-2 Fuel Oil AFVR 0.40 --
12/16/19 MW-3 Fuel Oil AFVR 0.35 0.01 2.82 426 10.25 13.07
12/16/19 RW-2 Fuel Oil AFVR 0.25 -- -- -- -- --
5/6/20 MW-3 Fuel Oil AFVR 0.46 -- 0.75 300 18.5 19.25
5/6/20 RW-1 Fuel Oil AFVR 0.30 -- -- -- -- --
6/18/20 MW-3 Fuel Oil AFVR 0.25 -- 2.83 250 16 18.83
6/18/20 RW-2 Fuel Oil AFVR 0.21 -- -- -- -- --
7/16/20 MW-3 Fuel Oil AFVR 0.52 0.1 3.91 600 33.75 37.66
7/16/20 RW-2 Fuel Oil AFVR 0.3 -- -- -- -- --
All Wells Fuel Oil MMPE -- -- 1.45 5,173 30 31.45
* Product recovery was conducted on three wells simultaneously. Individual measurements not collected.
Table B-2: Cumulative Volume of Free Product Recovered from Site
* Includes Free Product Recovery since 2015.
Date of Recovery
Event (m/dd/yy)
Total Volume Recovered from Site During
Current Recovery Event (gallons)
Cumulative Total of Volume Recovered to Date
from All Recovery Events (gallons)*
6/2/17-12/16/19 68.25 2,447.75
Table 3: Current and Historical Groundwater Elevations and Free Product Thickness
Revision Date: 2/27/20
Incident Number and Name: 41260, Brush Creek Elementary School
Well ID
# Date
Screened
Interval
(top of
screen,
bottom of
screen)
Depth to
Water*
Uncorrected
(feet)
Free
Product
Thickness
(feet)
Depth to
Water*
Corrected for
Free Product
Thickness
(feet)
Top of
Casing
Elevation
(MSL)
Groundwater
Surface
Elevation
(MSL)
MW-02 10/21/16 5 - 10 8.78 3.15 6.13 1906.11 1899.98
MW-03 10/21/16 2 - 12 6.63 1.54 5.34 1905.21 1899.87
MW-04 10/21/16 2 - 12 5.84 0.6 5.32 1904.97 1899.63
MW-02 11/30/16 5-10 9.25 2.9 6.81 1906.11 1899.30
MW-03 11/30/16 2 - 12 6.68 1.14 5.72 1905.21 1899.49
MW-04 11/30/16 2 - 12 5.30 0 5.30 1904.97 1899.67
MW-02 6/2/17 5 - 10 4.32 -- -- 1906.11 --
MW-03 6/2/17 2-12 2.71 0.79 2.05 1905.21 1903.16
MW-02 9/29/17 5-10 4.70 2.23 5.06 1906.11 1901.05
MW-03 9/29/17 2-12 3.90 1.25 3.9 1905.21 1901.31
MW-02 3/16/18 5-10 3.1 -- -- 1906.11 --
MW-03 3/16/18 2-12 2.81 1.10 1.88 1905.21 1903.33
MW-02 10/30/18 5-10 5.21 1.74 3.7 1906.11 1902.41
MW-03 10/30/18 2-10 3.21 0.6 2.69 1905.21 1902.52
MW-3 6/21/19 2-12 2.4 0.39 2.96 1906.11 1903.15
RW-2 6/21/19 2.5-12.5 4.01 1.16 -- -- --
MW-3 7/19/19 2-12 2.30 0.64 2.65 1906.11 1903.46
RW-2 7/19/19 2.5-12.5 3.04 0.26 -- -- --
MW-3 8/16/19 2-12 3.12 0.87 2.45 1906.11 1903.66
RW-2 8/16/19 2.5-12.5 4.3 0.41 -- -- --
MW-3 10/25/19 2-12 -- -- -- -- --
RW-2 10/25/19 2.5-12.5 -- -- -- -- --
MW-3 11/22/19 2-12 3.45 0.73 2.82 1906.11 1903.29
RW-2 11/22/19 2.5-12.5 4.60 0.40 -- -- --
MW-3 12/16/19 2-12 1.85 0.35 1.55 1906.11 1904.56
RW-2 12/16/19 2.5-12.5 2.83 0.25 -- -- --
MW-3 5/7/20 2-12 -- 0.46 -- 1906.11 --
RW-1 5/7/20 2.5-12.5 -- 0.30 -- 1906.70 --
MW-3 6/18/20 2-12 -- 0.25 -- 1906.11 --
RW-2 6/18/20 2.5-12.5 -- 0.21 -- 1906.70 --
MW-3 7/16/20 2-12 0.52 0.52 2.49 1906.11 1903.62
RW-2 7/16/20 2.5-12.5 0.30 0.30 3.84 1906.70 1902.65