AS-4172_41260_CA_MMPE_20190124

MOBILE MULTI-PHASE EXTRACTION AND VAPOR
INTRUSION INVESTIGATION

BRUSH CREEK ELEMENTARY SCHOOL
265 UPPER BRUSH CREEK ROAD
MARSHALL, NORTH CAROLINA 28753

NCDENR INCIDENT NO. 41260 MSGS PROJECT NUMBER: MC18-01

Prepared for
Madison County Board of Education
5738 US 25
Marshall, North Carolina 28753

JANUARY 2019 MARTIN&SLAGLE
GeoSciences, PA

MOBILE MULTI-PHASE EXTRACTION AND VAPOR
INTRUSION INVESTIGATION

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: MC18-01

Prepared by:
Martin&Slagle GeoSciences, PA
PO Box 1023
Black Mountain, North Carolina 28711
[phone]
FAX [phone]

JANUARY 2019

Brush Creek Elementary School, Madison County, NC
Mobile Multi-Phase Extraction and Vapor Intrusion Assessment Report
Incident #41260

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INTRODUCTION

Martin & Slagle GeoSciences, P.A. (MSGS) was retained by Madison 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 the
Mobile Multi-Phase Extraction (MMPE) and Vapor Intrusion (VI) assessments completed at the school.
The release has been assigned Incident Number 41260 by the North Carolina Department of
Environmental Quality (NCDEQ), UST Section. Based on information provided to NCDEQ in a Limited
Site Assessment (LSA) and Comprehensive Site Assessment (CSA) prepared by MSGS in January
2017 and March 2018, NCDEQ UST Section issued a Notice of Regulatory Requirements (NORR)
for this incident on April 13, 2018 directing the responsible party to prepare a Feasibility Study
which included a requirement to conduct MMPE and VI assessments 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.

A.1 Site Identification

Report Date: January 24, 2019
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

Brush Creek Elementary School, Madison County, NC
Mobile Multi-Phase Extraction and Vapor Intrusion Assessment Report
Incident #41260

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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

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
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 off of 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
wetlands maintained and monitored by student at the school.

Brush Creek Elementary School, Madison County, NC
Mobile Multi-Phase Extraction and Vapor Intrusion Assessment Report
Incident #41260

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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.

Brush Creek Elementary School, Madison County, NC
Mobile Multi-Phase Extraction and Vapor Intrusion Assessment Report
Incident #41260

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B. EXECUTIVE SUMMARY

Mobile Multiphase Extraction

MSGS completed a 96-hour Mobile Multiphase Extraction (MMPE) event during the week of August 6,
2018 to aggressively remove fuel oil free product from the subgrade at Brush Creek Elementary School.
Prior to conducting the event, 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. The MMPE was conducted on the
three new 4-inch wells (RW-1, RW-2 and RW-3), and the two existing adjacent wells (MW-2, MW-3) were
monitored during the event.

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. The total quantity of free product recovered from this site to date is 2,229
gallons.

Vapor Intrusion Study

Two indoor air samples and one outdoor air sample were collected inside and immediately outside the
gymnasium during the CSA in 2018. The fuel oil free-product plume is known to be adjacent to the east
wall of the gymnasium. It is unknown if free product is beneath the gym floor. The vapor samples were
collected to assess the potential of a complete pathway for petroleum hydrocarbon vapor migration into
the gymnasium. Indoor air samples with elevated benzene concentrations warranted additional
investigation.

A sampling plan was designed in July 2018 to confirm a vapor intrusion (VI) pathway for benzene into the
gymnasium interior, if one exists. This was accomplished by installing and sampling two vapor well points
through the gymnasium floor and into the subgrade immediately beneath the floor. Two sub-slab air
samples, one indoor air sample and one outdoor ambient air sample were collected and analyzed for
benzene, ethylbenzene, toluene and xylene.

Benzene, toluene, m&p- and o-xylene were detected at concentrations which exceed both the Division of
Waste Management Vapor Intrusion Sub-Slab and Exterior Soil Gas Screening Levels (SGSL), as well as
Brush Creek Elementary School, Madison County, NC
Mobile Multi-Phase Extraction and Vapor Intrusion Assessment Report
Incident #41260

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Residential Vapor Intrusion Screening Levels for Indoor Air (IASL) for Target Cancer Risks (TCR) 1.0E-6 and
1.0E-4.

Results were evaluated based on multiple lines of evidence as outlined in the DWM Vapor Intrusion
Guidance Document.
 The source of potential vapor intrusion is fuel oil in the form of free product which is present in
the vicinity of and possibly beneath the gymnasium on the groundwater table at approximately
three feet below the ground surface.
 The potential exists for vapors to migrate through floor penetrations in the gymnasium.
 Contaminants of concern were detected in soil gas and compared to SGSLs. Concentrations
exceeded SGSLs for benzene, toluene, and m&p- and o-xylene.
 Indoor air sample concentrations were slightly less than the sub-slab soil vapor concentrations
and exceed the IASLs.
 Outdoor ambient air results indicated that background concentrations were slightly elevated for
toluene but no other constituents. The ambient outdoor air does not appear to contribute to
elevated indoor air concentrations.

Based on evaluation of the soil gas and indoor air data, it appears that a VI pathway into the gymnasium
is complete.

Recommendations:

Since the MMPE event was only marginally successful, AFVRs should be routinely conducted until
measureable free product is removed and remediation of dissolved constituents can be initiated.

A complete vapor intrusion pathway appears to be present. Results should be reviewed by the state
toxicologist to determine if additional monitoring is appropriate or if active remediation is warranted.
According to the DWM VI Guidance Document, if the indoor air samples exceeds the TCR of 1.0E-04 limits
then confirmation indoor air sampling should be conducted.

Brush Creek Elementary School, Madison County, NC
Mobile Multi-Phase Extraction and Vapor Intrusion Assessment Report
Incident #41260

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C. TABLE OF CONTENTS

INTRODUCTION
Section A Site Information………………………...………….………………………………………………….1
Section B Executive Summary…….…………………………………………………………………………….4
Section C Table of Contents………………………………………………………………………………………6
Section D Free Product Recovery-MMPE Event……………….………………………………………..7
Section E Vapor Intrusion Investigation………….…………….…………………………………………12
Section F Conclusion and Recommendations..………………………………………………………..15

Figures
Figure 1 – Vicinity Map
Figure 2 – Site Map

Tables
Table 1 – Well Construction Details
Table 2 – Vapor Analytical Summary

Appendices
Appendix A – NORR
Appendix B – Boring and Well Logs
Appendix C – MMPE Spreadsheet and Waste Disposal Manifests
Appendix D – Laboratory Reports

Brush Creek Elementary School, Madison County, NC
Mobile Multi-Phase Extraction and Vapor Intrusion Assessment Report
Incident #41260

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D. FREE PRODUCT RECOVERY-MMPE EVENT

Background
Prior to conducting the MMPE event in August 2018, free-product recovery efforts have been on-going
since the release was discovered. Free product was measured in the source area at depths up to three
feet thick on the water table. Three AFVR events were conducted during the CSA on June 2, 2017,
September 29, 2017 and March 16, 2018. During this period a total of 1,900 gallons of mixed
water/product including 294 gallons of product were removed and properly disposed of. Wells MW-02
and MW-03 were pumped during the three most recent AFVRs conducted. Product has not been
observed in MW-04 since the AFVR conducted on October 21, 2016. Prior to the MMPE event a total of
2,198 gallons of product have been recovered from the subgrade and properly disposed of.

The interceptor trench was purged of fluid on March 16, 2018. Due to the high groundwater levels the
trench yields limited product. The free-product plume has retreated from MW-04 and is limited to MW-
02 and MW-03. The groundwater level in MW-02 increased to an elevation above the top of screen
elevation and product levels could not be determined accurately in this well. Groundwater and free
product levels were gauged before and immediately after each of the latest three AFVR events.

On August 6, 2018 a 96-hour MMPE event began. Prior to conducting the event, three four-inch
diameter monitoring wells were installed on the site within the free product plume. Figure 2 shows the
locations of the new wells. Well completion records are included in Appendix B. Each well was installed
to a depth of 12.5 feet below ground surface (bgs) and constructed of 4-inch diameter pvc casing and 10
feet of manufactured well screen. During setup, the operator attached vacuum lines equipped with
vacuum meters to the three recovery wells. Vacuum meters were also attached to monitoring wells
MW-02 and MW-03.

A&D Environmental Services, LLC conducted the event using a 280 cfm MMPE unit and a bulk tanker for
storage of recovered fluids. The operator collected the following data:
 System and extraction well vacuum readings
 VOC concentrations
 Air flow rate
 Humidity and temperature
Brush Creek Elementary School, Madison County, NC
Mobile Multi-Phase Extraction and Vapor Intrusion Assessment Report
Incident #41260

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 Vacuum influence

After 72 hours of operation, the MMPE unit malfunctioned and was replaced by an AFVR unit (vacuum
truck) for the remainder of the event. During the last 32 hours little water/fuel mixture was recovered
but the vapor concentration increased from 75 ppm to 175 ppm. The event was terminated after 96
hours of operation.

Data collected during the event was entered into a spreadsheet to calculate total emissions in pounds of
product and total gallons of product. Copies of the spreadsheets are included in Appendix C.

A total of 5,173 gallons of a mixture of groundwater and fuel oil were transported from the site and
properly disposed of at VLS Recovery Services, LLC in Lexington, SC. Copies of the non-hazardous waste
manifest and weigh ticket are included in Appendix C.

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. The total quantity of free product recovered from this site is 2,229.45 gallons.
Table 1, Table 2 and Table 3 summarize the recovery data for the AFVR and MMPE events.

Brush Creek Elementary School, Madison County, NC
Mobile Multi-Phase Extraction and Vapor Intrusion Assessment Report
Incident #41260

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Table 1: Free Product Recovery Information
Revision Date: 3/16/18
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 -- * * *
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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 -- -- -- --
10/30/18 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 -- -- -- -- -- --
All Wells Fuel Oil MMPE -- -- 1.45 5,173 30 31.45

* Product recovery was conducted on three wells simultaneously. Individual measurements not collected.
Note 1. The oil water interface was measured above the top of screen elevation.

Brush Creek Elementary School, Madison County, NC
Mobile Multi-Phase Extraction and Vapor Intrusion Assessment Report
Incident #41260

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Table B-2: Cumulative Volume of Free Product Recovered from Site

* Includes Free Product Recovery since 2015.

Table 3: Current and Historical Groundwater Elevations and Free Product Thickness
Revision Date: 1-7-19
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 6.07 1906.11 1899.98
MW-03 10/21/16 2 - 12 6.63 1.54 5.30 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 5.7 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
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)*
6/2/17-8/10/18 31.45 2,229.45
Brush Creek Elementary School, Madison County, NC
Mobile Multi-Phase Extraction and Vapor Intrusion Assessment Report
Incident #41260

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E. VAPOR INTRUSION INVESTIGATION

Three indoor air samples were collected during the CSA in 2018. The fuel oil free-product plume is known
to be adjacent to the east wall of the gymnasium. It is unknown if free product is beneath the gym floor.
The samples were collected to assess the potential of a complete pathway for petroleum hydrocarbon
vapors migration into the gymnasium.

Samples were collected in SUMA™ canisters, each set to collect the sample over an eight hour period.
Two canisters were set in occupied areas of the school adjacent to the free product area and one was set
outside the building on the ground over the free product area. The outdoor air sample was collected to
evaluate the ambient air condition directly above the free-product plume. The indoor air samples were
collected in the gymnasium along the east wall next to a floor penetration for a column and along the
west wall inside the cafeteria kitchen. Sampling locations are shown on Figure 2. Samples were analyzed
by the project laboratory for volatile organic compounds by Method TO-15. A total of 13 compounds
were detected in the samples above their method detection limits. The detected compounds were
compared to the NCDEQ Residential Vapor Intrusion Screening Levels (version February 2018), IASL (A).
One compound, benzene, was detected at 0.73 ug/m3 in the gymnasium sample AS-02 above its screening
level of 0.36 ug/m3. Benzene is associated with fuel oil. Chloroform was detected in the cafeteria kitchen
sample AS-03 at a concentration of 8.6 ug/m3 above its screening level of 0.12 ug/m3. Chloroform is not
associated with fuel oil but is a byproduct of the chlorination of drinking water and not the result of vapor
intrusion from the contamination plume.

The results were further evaluated by the NCDEQ Division of Waste Management Toxicologist. Results of
the evaluation indicated that while the some contaminant concentrations exceeded residential screening
levels they were below specified USEPA and NCDEQ maximum health risk limits for cancer and non-cancer
effects for residential use. At the recommendation of NCDEQ another sampling event was conducted to
verify that concentrations remain within acceptable levels.

Prior to conducting vapor sampling a building survey was conducted to identify background sources other
than the free-product plume that may contribute to indoor air impact. The gymnasium floor was
refinished in August prior to the beginning of the school year. The varnish used is distributed under the
brand name “Poloplaz World Class Finish”. According to the Safety Data Sheet, the varnish contains
Brush Creek Elementary School, Madison County, NC
Mobile Multi-Phase Extraction and Vapor Intrusion Assessment Report
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unspecified hydrotreated light petroleum distillates (CSA #64742-47-8) 55-60% by weight and solvent
naptha, medium aliphatic petroleum (CAS #64742-88-7) 1-5% by weight.

The finished gym floor was allowed to cure for over 60 days before collection of vapor samples. According
to the chemist for the manufacturer, this is sufficient time for off-gassing of petroleum hydrocarbons
included in the varnish mixture, and with adequate ventilation of the enclosed space the ambient indoor
air should be free of varnish related vapors.

The sampling plan was designed to confirm an exposure pathway for benzene into the gymnasium
interior, if one exists. This was accomplished by installing two vapor well points through the gymnasium
floor and into the subgrade immediately beneath the floor (Figure 2). Two sub-slab air samples, one
indoor air sample and one outdoor ambient air sample were collected and analyzed for benzene,
ethylbenzene, toluene and xylene.

Vapor Well Installation and Sampling
Two vapor well points were installed in penetrations through the gymnasium floor on August 31, 2018.
The well points were constructed of ¼-inch diameter stainless steel tubing connected to ¼-inch diameter
stainless steel well screen three inches long. The well screen extended six inches into the gravel layer
beneath the wood/concrete composite gym floor. The wellhead was situated below the floor surface
topped with a flat surface well cap. The annulus was sealed with lean cement grout and allowed to cure.

Vapor sampling was conducted 33 days after installation of the vapor well points. The sampling apparatus
consisted of a helium shroud, polyethylene tubing, valves, helium detector and SUMA canister. Helium
was injected into the shroud filling the space above the well head. A vapor sample was extracted from
the well and analyzed for the presence of helium. The seal around both wells were determined to be
adequate as no helium was detected in the initial air sample. Following testing of the well seal, each well
was connected to a SUMA canister which was set to collect an eight-hour air sample. The ambient air
sample and the outdoor background vapor samples were collected over the same eight-hour period in
SUMA canisters.

The SUMA canisters containing the vapor samples were shipped to Pace Laboratories. Samples were
analyzed for petroleum aromatic compounds by EPA Method TO-3.
Brush Creek Elementary School, Madison County, NC
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Results
Samples were collected beneath the floor slab from vapor wells VW-01 and VW-02. Results were
compared to the NC Division of Waste Management Vapor Intrusion Guidance, “Sub-Slab and Exterior Soil
Gas Screening Levels” (SGSL). In the sample from VW-01 no concentrations were above reporting limits
for their respective analytes. The method detection limits for m&p- and o-xylenes were above the
screening levels. Reporting limits were high due to dilution of the sample. Results for VW-02 were above
the sub-slab screening levels for benzene 4,550 ug/m3 and toluene 62,400 ug/m3. Screening levels for
benzene and toluene are 1,200 ug/m3 and 35,000 ug/m3, respectively. Both m&p and o-xylene were
detected in sub-slab vapor samples at 4,410J ug/m3and 2,740J ug/m3. Despite the being flagged as
estimated “J” values, the estimated concentrations were in excess of the screening levels.

The indoor air sample AS-04 had a concentration of 1,920J ug/m3 for benzene and 13,800 ug/m3 for
toluene which exceed the IASLs. The IASL for benzene is 0.36 ug/m3 and toluene is 1,000 ug/m3. The
concentration for this indoor air sample for o-xylene is estimated at 1,280J which is in excess of the
screening level of 21 ug/m3.

No analytes were detected in sample AS-05 above Exterior Soil Gas Screening Levels. However, the
method detection limits for this sample were higher than the screening levels for m&p- and o-xylene.

Results were evaluated based on multiple lines of evidence as outlined in the DWM Vapor Intrusion
Guidance Document.
 The source of potential vapor intrusion is fuel oil in the form of free product which is present in
the vicinity of and possibly beneath the gymnasium on the groundwater table at approximately
three feet below the ground surface.
 The potential exists for vapors to migrate through floor penetrations in the gymnasium.
 Contaminants of concern were detected in soil gas and compared to SGSLs. Concentrations
exceeded SGSLs for benzene, toluene, and m&p- and o-xylene.
 Indoor air sample concentrations were slightly less than the sub-slab soil vapor concentrations
and exceed the IASLs.
Brush Creek Elementary School, Madison County, NC
Mobile Multi-Phase Extraction and Vapor Intrusion Assessment Report
Incident #41260

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 Outdoor ambient air results indicated that background concentrations were slightly elevated for
toluene but no other constituents. The ambient outdoor air does not appear to contribute to
elevated indoor air concentrations.

Based on evaluation of the soil gas and indoor air data, it appears that a VI pathway into the gymnasium
is complete. Benzene, toluene, m&p- and o-xylene were detected at concentrations which exceed both
the Division of Waste Management Vapor Intrusion Sub-Slab and Exterior Soil Gas Screening Levels, as
well as Residential Vapor Intrusion Screening Levels for Target Risks 1.0E-6 and 1.0E-4. Cumulative risk
has not been calculated.

F. CONCLUSIONS AND RECOMMENDATIONS

The MMPE process conducted in August 2018 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. The total quantity of free product recovered from this
site is 2,229.45 gallons. AFVRs conducted prior to the MMPE appears to be a more efficient process and
should be continued monthly until measurable free product is removed and groundwater remediation
can begin.

Sub-slab and indoor air sampling results indicate that vapor intrusion is an issue to be further addressed
in the gymnasium. Benzene was detected in air samples above the NCDEQ indoor air screening levels
during the both sampling events. Toluene and o-xylene were detected in the sub-slab samples at
concentrations exceeding soil gas screening levels, and in the indoor air samples exceeding IASLs. M&p-
xylene was detected in the sub-slab sample at concentrations which exceed the Soil Gas Screening Levels
but it is unclear if the associated indoor air also exceeds the indoor levels. The method detection limits
were elevated above the IASLs.

A complete vapor intrusion pathway appears to be present. Results should be reviewed by the state
toxicologist to determine if additional monitoring is appropriate or if active remediation is warranted.

In the interim, the school system maintenance supervisor is providing ventilation for the gymnasium
Brush Creek Elementary School, Madison County, NC
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enclosure by opening windows and or doors when occupied. The gymnasium does not have a forced air
HVAC system that could provide positive pressure within the space.

FIGURES
FIGURE 1PREPARED FOR: Madison County Schools
DATE: 1/4/19
DR: RLM
CHK:RLM
VICINITY MAP
Mobile Multi-Phase Extraction and
Vapor Intrusion Assessment Report
Brush Creek Elementary School
Marshall, NC
MARTIN&SLAGLE
GeoSciences, PA
PO Box 1023
Black Mountain, NC 28711
828.669.3929 828.669.5289
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: 12/12/18
SITE MAP
MMPE and Vapor Intrusion Site Map
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-2
MW-4
INTERCEPTOR
TRENCH
FUEL OIL DISCHARGE TO
DRAINAGE SWALE
0 25 50
SCALE
(APPROX.)
MW-06
MW-07
MW-05
AS-02
SW-01
SW -02
In Lower
Brush Creek
Madison County
Board of
Education
AS-03AS-01
VI Air Sample
LEGEND
Free Product Plume 3/16/18
Free Product Plume 12/2/16
MW-3
VW-02
VW-01AS-04
AS-05
MECHANICAL ROOM
RW-1
RW-3
RW-2
MMPE Recovery Wells

TABLES
Table 1
Mobile Multi-Phase Extraction and Vapor Intrusion Assessment
Monitoring Well Construction Data
Brush Creek Elementary School
Marshal, North Carolina
Well
Number Date Installed
Well
Diameter
(Inches)
Screen
Length
(Feet)
Screen
Interval
(Feet BGS)
Top of
Casing
Elevation
Water
Level Data
9/20/16
Water
Level Data
3/16/18
Water
Level Data
10/30/18
MW-01 4/20/2016 2 15 1.5-16.5 1906.63 1900.38 1901.87 NM
MW-02 4/20/2016 2 10 5-10 1906.11 NM 1903.01*1902.36*
MW-03 4/20/2016 2 15 2-12 1905.21 1900.95 1902.40*1903.5*
MW-04 4/20/2016 2 10 2-12 1904.97 1900.78 1902.85 NM
MW-05 5/31/2017 2 5 5-10 1903.97 NM 1900.33 NM
MW-06 5/31/2017 2 5 5-10 1905.35 NM 1899.37 NM
MW-07 5/31/2017 2 5 1-5 1905.96 NM 1903.70 NM
RW-1 7/26/2018 4 10 2.5-12.5 NM NM NM NM
RW-2 7/26/2018 4 10 2.5-12.5 NM NM NM NM
RW-3 7/26/2018 4 10 2.5-12.5 NM NM NM NM
All elevations in feet above mean sea level.
hc = hm+ (Ho * P o/P w )
where: hc = hydraulic head correction (ft)
hm = elevation of oil/water interface
Ho = product thickness (ft)
P o = hydrocarbon density (g/ml)
P w = water density (assumed 1.0)
NM- Not Measured
* Water levels in wells with measurable free product were determined using the following correction
Table 2
Mobile Multiphase Extraction and Vapor Intrusion Assessment
Vapor Analytical Results
Brush Creek Elementary School
Marshall, North Carolina
Sample ID AS-01 AS-02 AS-03 VW-01 VW-02 AS-04 AS-05
Sample Date 3/16/2018 3/16/2018 3/16/2018 10/3/2018 10/3/2018 10/3/2018 10/3/2018
Compound
Concentrations
ug/m3
Compound
Concentrations
ug/m3
Compound
Concentrations
ug/m3
Compound
Concentrations
ug/m3
Compound
Concentrations
ug/m3
Compound
Concentrations
ug/m3
Compound
Concentrations
ug/m3
See Note 1 See Note 2 See Note 2 See Note 1 See Note 1 See Note 2 See Note 1
Acetone NA 6500 6500 19.0 44.7 34.6 NA NA NA NA
Benzene 1,200 0.36 6.3 <0.70 0.73 <0.68 <909 4550 1920J <1010
Chloroform NA 0.12 12 <1.1 <1.1 8.6 NA NA NA NA
Chloromethane NA 19 19 1.1 <0.92 <0.88 NA NA NA NA
Cyclohexane NA 1300 1.300 2.1 8.5 3.3 NA NA NA NA
Dichlorodifluoromethane NA 21 21 2.6 2.7 2.6 NA NA NA NA
Ethyl Acetate NA 15 15 <1.6 <1.6 4.3 NA NA NA NA
Ethybenzene 3,700 1.1 110 <1.9 <1.9 <1.9 <1060 1460J <1060 <1150
Hexane, N-NA 150 150 2.9 <1.6 3.0 NA NA NA NA
Methyl Ethyl Ketone (2-Butanone)NA 1000 1000 <6.4 11.3 9.4 NA NA NA NA
Methylene Chloride NA 100 130 23.2 12.9 10.6 NA NA NA NA
Tetrachloroethylene NA 8.3 8.3 <1.5 2.5 <1.4 NA NA NA NA
Toluene 35,000 1000 1000 <1.6 2.9 1.9 <919 62,400 13,800 9190
Vinyl acetate NA 42 42 <1.6 2.3 3.7 NA NA NA NA
m&p-Xylene 700 21 21 <3.8 <3.9 <3.7 <1940 4410J <1940 <1150
o-Xylene 700 21 21 <1.9 <1.9 <1.9 <1060 2740J 1280J <5300
Note 1 Subslab and Soil Gas results
Note 2 Indoor Air Result - compare to IASL (A) Levels
A: "<" precedes the laboratory method detection limit (MDL) indicating the results are below the Reporting Limit.
Concentrations in bold exceed the NCDEQ Residential Vapor Intrusion Screening Levels, Indoor Screening Level (A).
"J"- Value is an estimated value between one half the Method Detection Limit and the Reporting Limit.
TO-3AnalysesTO-15
Compound ug/m3
TO-15 TO-15
NCDEQ Residential
Vapor Intrusion
Screening Levels
IASL (A)
TCR=1.0E-06 TO-3 TO-3 TO-3
Sub-Slab and Exterior
Soil Gas Screening
Levels
ug/m3
NCDEQ Residential
Vapor Intrusion
Screening Levels
IASL (C)
TCR=1.0E-04
ug/m3

APPENDIX A
Notice of Regulatory Requirements

APPENDIX B
Boring and Well Logs
WELL CONSTRUCTION RECORD
This form can be used for single or multiple wells
Form GW-1 North Carolina Department of Environment and Natural Resources – Division of Water Quality Revised Jan. 2013
1. Well Contractor Information:

Well Contractor Name

NC Well Contractor Certification Number

Company Name 2. Well Construction Permit #: List all applicable well construction permits (i.e. County, State, Variance, etc.) 3. Well Use (check well use): Water Supply Well: □Agricultural □Municipal/Public □Geothermal (Heating/Cooling Supply) □Residential Water Supply (single)
□Industrial/Commercial □Residential Water Supply (shared) □Irrigation
Non-Water Supply Well: □Monitoring □Recovery
Injection Well: □Aquifer Recharge □Groundwater Remediation
□Aquifer Storage and Recovery □Salinity Barrier □Aquifer Test □Stormwater Drainage
□Experimental Technology □Subsidence Control
□Geothermal (Closed Loop) □Tracer □Geothermal (Heating/Cooling Return) □Other (explain under #21 Remarks)
4. Date Well(s) Completed: ____________ Well ID#______________________ 5a. Well Location:
Facility/Owner Name Facility ID# (if applicable)

Physical Address, City, and Zip
County Parcel Identification No. (PIN) 5b. Latitude and Longitude in degrees/minutes/seconds or decimal degrees: (if well field, one lat/long is sufficient) N W
6. Is (are) the well(s): □Permanent or □Temporary

7. Is this a repair to an existing well: □Yes or □No If this is a repair, fill out known well construction information and explain the nature of the repair under #21 remarks section or on the back of this form.
8. Number of wells constructed: For multiple injection or non-water supply wells ONLY with the same construction, you can submit one form. 9. Total well depth below land surface: (ft.) For multiple wells list all depths if different (example- 3@200’ and 2@100′) 10. Static water level below top of casing: (ft.) If water level is above casing, use “+” 11. Borehole diameter: (in.) 12. Well construction method: (i.e. auger, rotary, cable, direct push, etc.) FOR WATER SUPPLY WELLS ONLY: 13a. Yield (gpm) Method of test: 13b. Disinfection type: Amount:

14. WATER ZONES
FROM TO DESCRIPTION
ft. ft.
ft. ft.
15. OUTER CASING (for multi-cased wells) OR LINER (if applicable) FROM TO DIAMETER THICKNESS MATERIAL
ft. ft. in.
16. INNER CASING OR TUBING (geothermal closed-loop)
FROM TO DIAMETER THICKNESS MATERIAL
ft. ft. in.
ft. ft. in.
17. SCREEN FROM TO DIAMETER SLOT SIZE THICKNESS MATERIAL
ft. ft. in.
ft. ft. in.
18. GROUT
FROM TO MATERIAL EMPLACEMENT METHOD & AMOUNT
ft. ft.
ft. ft.
ft. ft.
19. SAND/GRAVEL PACK (if applicable)
FROM TO MATERIAL EMPLACEMENT METHOD
ft. ft.
ft. ft.
20. DRILLING LOG (attach additional sheets if necessary) FROM TO DESCRIPTION (color, hardness, soil/rock type, grain size, etc.)
ft. ft.
ft. ft.
ft. ft.
ft. ft.
ft. ft.
ft. ft.
ft. ft.
21. REMARKS

22. Certification:
Signature of Certified Well Contractor Date By signing this form, I hereby certify that the well(s) was (were) constructed in accordance with 15A NCAC 02C .0100 or 15A NCAC 02C .0200 Well Construction Standards and that a copy of this record has been provided to the well owner.
23. Site diagram or additional well details: You may use the back of this page to provide additional well site details or well construction details. You may also attach additional pages if necessary. SUBMITTAL INSTUCTIONS 24a. For All Wells: Submit this form within 30 days of completion of well construction to the following: Division of Water Quality, Information Processing Unit, 1617 Mail Service Center, Raleigh, NC 27699-1617
24b. For Injection Wells: In addition to sending the form to the address in 24a
above, also submit a copy of this form within 30 days of completion of well construction to the following: Division of Water Quality, Underground Injection Control Program, 1636 Mail Service Center, Raleigh, NC 27699-1636
24c. For Water Supply & Injection Wells: In addition to sending the form to the address(es) above, also submit one copy of this form within 30 days of
completion of well construction to the county health department of the county where constructed.
For Internal Use ONLY:
WELL CONSTRUCTION RECORD
This form can be used for single or multiple wells
Form GW-1 North Carolina Department of Environment and Natural Resources – Division of Water Quality Revised Jan. 2013
1. Well Contractor Information:

Well Contractor Name

NC Well Contractor Certification Number

Company Name 2. Well Construction Permit #: List all applicable well construction permits (i.e. County, State, Variance, etc.) 3. Well Use (check well use): Water Supply Well: □Agricultural □Municipal/Public □Geothermal (Heating/Cooling Supply) □Residential Water Supply (single)
□Industrial/Commercial □Residential Water Supply (shared) □Irrigation
Non-Water Supply Well: □Monitoring □Recovery
Injection Well: □Aquifer Recharge □Groundwater Remediation
□Aquifer Storage and Recovery □Salinity Barrier □Aquifer Test □Stormwater Drainage
□Experimental Technology □Subsidence Control
□Geothermal (Closed Loop) □Tracer □Geothermal (Heating/Cooling Return) □Other (explain under #21 Remarks)
4. Date Well(s) Completed: ____________ Well ID#______________________ 5a. Well Location:
Facility/Owner Name Facility ID# (if applicable)

Physical Address, City, and Zip
County Parcel Identification No. (PIN) 5b. Latitude and Longitude in degrees/minutes/seconds or decimal degrees: (if well field, one lat/long is sufficient) N W
6. Is (are) the well(s): □Permanent or □Temporary

7. Is this a repair to an existing well: □Yes or □No If this is a repair, fill out known well construction information and explain the nature of the repair under #21 remarks section or on the back of this form.
8. Number of wells constructed: For multiple injection or non-water supply wells ONLY with the same construction, you can submit one form. 9. Total well depth below land surface: (ft.) For multiple wells list all depths if different (example- 3@200’ and 2@100′) 10. Static water level below top of casing: (ft.) If water level is above casing, use “+” 11. Borehole diameter: (in.) 12. Well construction method: (i.e. auger, rotary, cable, direct push, etc.) FOR WATER SUPPLY WELLS ONLY: 13a. Yield (gpm) Method of test: 13b. Disinfection type: Amount:

14. WATER ZONES
FROM TO DESCRIPTION
ft. ft.
ft. ft.
15. OUTER CASING (for multi-cased wells) OR LINER (if applicable) FROM TO DIAMETER THICKNESS MATERIAL
ft. ft. in.
16. INNER CASING OR TUBING (geothermal closed-loop)
FROM TO DIAMETER THICKNESS MATERIAL
ft. ft. in.
ft. ft. in.
17. SCREEN FROM TO DIAMETER SLOT SIZE THICKNESS MATERIAL
ft. ft. in.
ft. ft. in.
18. GROUT
FROM TO MATERIAL EMPLACEMENT METHOD & AMOUNT
ft. ft.
ft. ft.
ft. ft.
19. SAND/GRAVEL PACK (if applicable)
FROM TO MATERIAL EMPLACEMENT METHOD
ft. ft.
ft. ft.
20. DRILLING LOG (attach additional sheets if necessary) FROM TO DESCRIPTION (color, hardness, soil/rock type, grain size, etc.)
ft. ft.
ft. ft.
ft. ft.
ft. ft.
ft. ft.
ft. ft.
ft. ft.
21. REMARKS

22. Certification:
Signature of Certified Well Contractor Date By signing this form, I hereby certify that the well(s) was (were) constructed in accordance with 15A NCAC 02C .0100 or 15A NCAC 02C .0200 Well Construction Standards and that a copy of this record has been provided to the well owner.
23. Site diagram or additional well details: You may use the back of this page to provide additional well site details or well construction details. You may also attach additional pages if necessary. SUBMITTAL INSTUCTIONS 24a. For All Wells: Submit this form within 30 days of completion of well construction to the following: Division of Water Quality, Information Processing Unit, 1617 Mail Service Center, Raleigh, NC 27699-1617
24b. For Injection Wells: In addition to sending the form to the address in 24a
above, also submit a copy of this form within 30 days of completion of well construction to the following: Division of Water Quality, Underground Injection Control Program, 1636 Mail Service Center, Raleigh, NC 27699-1636
24c. For Water Supply & Injection Wells: In addition to sending the form to the address(es) above, also submit one copy of this form within 30 days of
completion of well construction to the county health department of the county where constructed.
For Internal Use ONLY:
WELL CONSTRUCTION RECORD
This form can be used for single or multiple wells
Form GW-1 North Carolina Department of Environment and Natural Resources – Division of Water Quality Revised Jan. 2013
1. Well Contractor Information:

Well Contractor Name

NC Well Contractor Certification Number

Company Name 2. Well Construction Permit #: List all applicable well construction permits (i.e. County, State, Variance, etc.) 3. Well Use (check well use): Water Supply Well: □Agricultural □Municipal/Public □Geothermal (Heating/Cooling Supply) □Residential Water Supply (single)
□Industrial/Commercial □Residential Water Supply (shared) □Irrigation
Non-Water Supply Well: □Monitoring □Recovery
Injection Well: □Aquifer Recharge □Groundwater Remediation
□Aquifer Storage and Recovery □Salinity Barrier □Aquifer Test □Stormwater Drainage
□Experimental Technology □Subsidence Control
□Geothermal (Closed Loop) □Tracer □Geothermal (Heating/Cooling Return) □Other (explain under #21 Remarks)
4. Date Well(s) Completed: ____________ Well ID#______________________ 5a. Well Location:
Facility/Owner Name Facility ID# (if applicable)

Physical Address, City, and Zip
County Parcel Identification No. (PIN) 5b. Latitude and Longitude in degrees/minutes/seconds or decimal degrees: (if well field, one lat/long is sufficient) N W
6. Is (are) the well(s): □Permanent or □Temporary

7. Is this a repair to an existing well: □Yes or □No If this is a repair, fill out known well construction information and explain the nature of the repair under #21 remarks section or on the back of this form.
8. Number of wells constructed: For multiple injection or non-water supply wells ONLY with the same construction, you can submit one form. 9. Total well depth below land surface: (ft.) For multiple wells list all depths if different (example- 3@200’ and 2@100′) 10. Static water level below top of casing: (ft.) If water level is above casing, use “+” 11. Borehole diameter: (in.) 12. Well construction method: (i.e. auger, rotary, cable, direct push, etc.) FOR WATER SUPPLY WELLS ONLY: 13a. Yield (gpm) Method of test: 13b. Disinfection type: Amount:

14. WATER ZONES
FROM TO DESCRIPTION
ft. ft.
ft. ft.
15. OUTER CASING (for multi-cased wells) OR LINER (if applicable) FROM TO DIAMETER THICKNESS MATERIAL
ft. ft. in.
16. INNER CASING OR TUBING (geothermal closed-loop)
FROM TO DIAMETER THICKNESS MATERIAL
ft. ft. in.
ft. ft. in.
17. SCREEN FROM TO DIAMETER SLOT SIZE THICKNESS MATERIAL
ft. ft. in.
ft. ft. in.
18. GROUT
FROM TO MATERIAL EMPLACEMENT METHOD & AMOUNT
ft. ft.
ft. ft.
ft. ft.
19. SAND/GRAVEL PACK (if applicable)
FROM TO MATERIAL EMPLACEMENT METHOD
ft. ft.
ft. ft.
20. DRILLING LOG (attach additional sheets if necessary) FROM TO DESCRIPTION (color, hardness, soil/rock type, grain size, etc.)
ft. ft.
ft. ft.
ft. ft.
ft. ft.
ft. ft.
ft. ft.
ft. ft.
21. REMARKS

22. Certification:
Signature of Certified Well Contractor Date By signing this form, I hereby certify that the well(s) was (were) constructed in accordance with 15A NCAC 02C .0100 or 15A NCAC 02C .0200 Well Construction Standards and that a copy of this record has been provided to the well owner.
23. Site diagram or additional well details: You may use the back of this page to provide additional well site details or well construction details. You may also attach additional pages if necessary. SUBMITTAL INSTUCTIONS 24a. For All Wells: Submit this form within 30 days of completion of well construction to the following: Division of Water Quality, Information Processing Unit, 1617 Mail Service Center, Raleigh, NC 27699-1617
24b. For Injection Wells: In addition to sending the form to the address in 24a
above, also submit a copy of this form within 30 days of completion of well construction to the following: Division of Water Quality, Underground Injection Control Program, 1636 Mail Service Center, Raleigh, NC 27699-1636
24c. For Water Supply & Injection Wells: In addition to sending the form to the address(es) above, also submit one copy of this form within 30 days of
completion of well construction to the county health department of the county where constructed.
For Internal Use ONLY:
Site Name:Brush Creek Elementary School Soil Boring ID:RW-1
Location:265 Upper Brush Creek Road Construction Date:July 26, 2018
Marshall, NC 28753 Drilling Contractor:Geologic Exploration
Drill Rig Type:Direct Push w/ Rotary Auger
Proj. Name:MMPE Event Drilling Method:Rotary Auger
Project No.:MC18-01
Client:Madison County Board of Education Logged By:RLM
Top-of-Casing Elev.:Depth bgs (ft)Groundwater Level @Time-of-BoringScreenedInterval (ft)Organic VaporReading (ppm)Blow Countn valueSampleInterval/TypeAsphalt and gravel GW
239
PWR that becomes Yellow, tan silty fine to medium SM
5 640 SAND when sampled.
10
Boring Terminated 12.5 ft
15
20
- Groundwater Level @ Time-of-Boring -Hand Auger - Direct Push
- Screened Interval -Std. Penetration Test - Cuttings
(SPT)
Notes: If provided, organic vapor readings are obtained -Submitted for laboratory analysis
by a PID (photoionization detector)
bgs - below ground surface
ppm - parts per million
EOB - end of boring
GeoSciences, PA
BLACK MOUNTAIN, NORTH CAROLINA
Page 1 of 1
Boring Log
Comments Soil Description & Classification (USCS)
Symbols
MARTIN&SLAGLE
Site Name:Brush Creek Elementary School Soil Boring ID:RW-2
Location:265 Upper Brush Creek Road Construction Date:July 26, 2018
Marshall, NC 28753 Drilling Contractor:Geologic Exploration
Drill Rig Type:Direct Push w/ Rotary Auger
Proj. Name:MMPE Event Drilling Method:Rotary Auger
Project No.:MC18-01
Client:Madison County Board of Education Logged By:RLM
Top-of-Casing Elev.:Depth bgs (ft)Groundwater Level @Time-of-BoringScreenedInterval (ft)Organic VaporReading (ppm)Blow Countn valueSampleInterval/TypeGray brown silty fine to medium SAND SM
490
PWR that becomes gray, brown silty fine to medium SAND SM
5 1002 when sampled. Hard.
10 832
Boring Terminated 12.5 ft
15
20
- Groundwater Level @ Time-of-Boring -Hand Auger - Direct Push
- Screened Interval -Std. Penetration Test - Cuttings
(SPT)
Notes: If provided, organic vapor readings are obtained -Submitted for laboratory analysis
by a PID (photoionization detector)
bgs - below ground surface
ppm - parts per million
EOB - end of boring
GeoSciences, PA
BLACK MOUNTAIN, NORTH CAROLINA
Page 1 of 1
Boring Log
Comments Soil Description & Classification (USCS)
Symbols
MARTIN&SLAGLE
Site Name:Brush Creek Elementary School Soil Boring ID:RW-3
Location:265 Upper Brush Creek Road Construction Date:July 27, 2018
Marshall, NC 28753 Drilling Contractor:Geologic Exploration
Drill Rig Type:Direct Push w/ Rotary Auger
Proj. Name:MMPE Event Drilling Method:Rotary Auger
Project No.:MC18-01
Client:Madison County Board of Education Logged By:RLM
Top-of-Casing Elev.:Depth bgs (ft)Groundwater Level @Time-of-BoringScreenedInterval (ft)Organic VaporReading (ppm)Blow Countn valueSampleInterval/Type213
PWR that becomes brown fine sandy SILT ML
5 267 when sampled. Hard.
528
10
275 Boring Terminated 12.5 ft
985
15
20
- Groundwater Level @ Time-of-Boring -Hand Auger - Direct Push
- Screened Interval -Std. Penetration Test - Cuttings
(SPT)
Notes: If provided, organic vapor readings are obtained -Submitted for laboratory analysis
by a PID (photoionization detector)
bgs - below ground surface
ppm - parts per million
EOB - end of boring
GeoSciences, PA
BLACK MOUNTAIN, NORTH CAROLINA
Page 1 of 1
Boring Log
Comments Soil Description & Classification (USCS)
Symbols
MARTIN&SLAGLE

APPENDIX C
MMPE Spreadsheet and Waste Disposal Manifests
Site: Brush Creek Elementary School, 267 Upper Brush Creek Rd., Marshall, NC Job #
8/6/18 - 1215 6 -15 -21 -17 -5.65 -15.68
1245 6 -15 -21 -17 -6.73 -15.91
1315 6 -15 -21 -17 -7.91 -16.07
1345 6 -15 -21 -17 -8.10 -16.70
1415 6 -15 -21 -17 -7.30 -18.15
1445 6.5 -15 -21 -17 -8.08 -26.40
1545 6.5 -15 -21 -17 -8.26 -26.29
1645 6.5 -15 -21 -17 -8.19 -27.16
1745 6.5 -15 -21 -17 -8.23 -28.03
1845 6.5 -15 -21 -17 -8.16 -52.05
1945 6.5 -15 -21 -17 -8.11 -48.08
8/7/18 - 0800 6.5 -15 -21 -17 -5.98 -34.82
0900 6.5 -15 -15 -17 -5.52 -30.10
1000 6.5 -15 -15 -17 -5.63 -31.15
1100 6.5 -15 -15 -17 -5.10 -23.60
1200 6.5 -15 -15 -17 -4.93 -20.90
1300 6.5 -13 -15 -16 -3.16 -15.04
1400 6.5 -13 -15 -16 -2.10 -20.90
1500 6.5 -13 -15 -16 -2.26 -19.83
1600 6.5 -13 -15 -16 -2.20 -20.61
8/8/18 - 0800 6.5 -13 -15 -16 -1.81 -12.23
0900 6.5 -13 -15 -16 -2.16 -13.61
1000 6.5 -13 -15 -16 -2.09 -14.32
1100 6.5 -13 -15 -16 -1.90 -14.71
1200 6.5 -13 -15 -16 -1.56 -14.46
1300 6.5 -13 -15 -16 -1.90 -15.07
1400 6.5 -13 -15 -16 -2.10 -15.12
1500 6.5 -13 -15 -16 -2.18 -14.98
1600 6.5 -13 -15 -16 -2.23 -14.83
8/9/18 - 0700 8 -13 -15 -16 -1.75 -13.12
0800 8 -13 -15 -16 -1.99 -10.06
0900 8 -13 -15 -16 -2.01 -11.09Stinger Depth Extraction Well-head Vacuum
(in Hg)RW-1RW-3RW-2 Time (hh:mm)
Event Start 1145
Influence On Surrounding Wells
Vacuum (in water) MW-2 MW-3AFVR Field Data Sheet
Client: Martin & Slagle
MMPE Operator: Terry Green
8/6/18 - 8/10/18
Technician:
Adjacent Well Water Level Measurements
No Product Detected
1808-0160
Site: Brush Creek Elementary School, 267 Upper Brush Creek Rd., Marshall, NC Job #Stinger Depth Extraction Well-head Vacuum
(in Hg)RW-1RW-3RW-2 Time (hh:mm)
Event Start 1145
Influence On Surrounding Wells
Vacuum (in water) MW-2 MW-3AFVR Field Data Sheet
Client: Martin & Slagle
MMPE Operator: Terry Green
8/6/18 - 8/10/18
Technician:
Adjacent Well Water Level Measurements
No Product Detected
1808-0160
1000 8 -13 -15 -16 -3.06 -15.12
1830 8 -13 -15 -16 -3.31 -13.61
1930 8 -13 -15 -16 -3.15 -13.93
2030 8 -13 -15 -16 -3.46 -15.09
2130 8 -13 -15 -16 -3.40 -15.26
2230 8 -13 -15 -16 -3.51 -15.91
8/10/18 - 0700 10 -13 -15 -16 -9.15 -20.99
0800 10 -13 -15 -16 -8.87 -21.32
0900 10 -13 -15 -16 -9.01 -21.19
1000 10 -13 -15 -16 -9.13 -21.10
1100 12 -13 -15 -16 -9.21 -20.97
1200 12 -13 -15 -16 -9.14 -21.03
1300 12 -13 -15 -16 -9.06 -21.18
1400 12 -13 -15 -16 -8.85 -21.32
1500 12 -13 -15 -16 -8.31 -21.18
0.00
MW-
11.15
RW-2
0.00
0.00
11.20
MW-

Weather: Extraction
Wells RW-1 RW-3
Depth Below
Top of Casing
(ft)
MW-
Depth to free product post-AFVR
0.00 0.00
0.00
Depth to free product pre-AFVR
Depth to groundwater post-AFVR
MW-MW-
12.05

Depth to groundwater pre-AFVR
Site: Store #277, 113 State Street, Holly Hill, SCBrush Creek Elementary School, 267 Upper Brush Creek Rd., Marshall, NC
1 4
8/6/18 - 1215 30
1245 30
1315 30
1345 30
1415 30
1445 30
1545 60
1645 60
1745 60
1845 60
1945 60
8/7/18 - 0800 735
0900 60
1000 60
1100 60
1200 60
1300 60
1400 60
1500 60
1600 60
8/8/18 - 0800 960
0900 60
1000 60
1100 60
1200 60
1300 60
1400 60
1500 60
1600 60
8/9/18 - 0700 900
0800 60
0900 60
0.0
0.0
0.0
0.0
AFVR Data Sheet - Emissions Data & Calculation
Client: Martin & Slagle
0.0
0.0
0.0
Post
PPMmea
(PPMv)
Time (h:m)Delta Time(min)0.01
0.05
0.01
114 0.000007
0.0
0.0
0.0
0.0
0.0
0.0
0.02
0.0
0.0
0.0
0.100
0.0
0.100
0.01
8/6/18 - 8/10/18
0.01
Mass Conc
(lb/ft3)
0.000008
147
Response Factor:
0.000018
0.000021
28 1
57 304 0.000019
189 0.000012
0.00000928
210.0
0.0
0.0
295
21.6 295
0.0
0.0
300
Pre
PPMmea
(PPMv)
Flow
(acfm)
0.0
0.0
0.0
1.3
RH
(%)
18.5
23.9
Response
Factor
Corrected
Conc
(PPMv)
2570
Water
Vapor
(vol %)
Flow
Qstd
(dscfm)
0.100 1
Specific
Humidity
(lbW / lbDA)
Job#
0.138 25 133
Stack Dia(in):
Mass
Removed (lb)
1808-0160
42
Meters: MiniRae 3000 PID, RH pen
0.100 0.138 42 57 1
Dry
Conc
(PPMv)
0.100 0.138 42
1
Temp
(0 F)
Mass Conc
(mg/m3)
49.3 0.0 300 1.0 70
1.2 70
1.9 70 0.100 0.138 42 21
21.3 300 1.7 70 0.100 0.138 42 131 0.000008 0.0125251
30.6 300 2.0 70 0.1000.0 0.138 42 36 1 36
46.2 300 2.5 70 0.100 0.138 42 54 54 2851
53.4 300 1.7 70 0.1000.0 0.138 42 62 1 62 329 0.05
175.3 300 0.8 70 0.100 0.138 42 203 1 203 1082 0.000068 2.56
168.6 300 1.0 70 0.100 0.138 42 196 1 196 1040 0.000065 0.16
171.9 300 1.3 70 0.138 42 199 1 199 1061 0.000066 0.17
86.9 300 2.1 70 0.1000.0 0.138 42 101 1 101 536 0.000033 0.08
61.2 300 2.5 70 0.1000.0 0.138 42 71 1 71 378 0.000024 0.06
54.3 300 1.5 70 0.138 42 63 1 63 335 0.000021 0.05
30.5 300 1.3 70 0.100 0.138 42 35 1 35 188 0.000012 0.03
76.3 300 1.0 70 0.100 0.138 42 89 1 89 471 0.000029 0.91
62.5 300 0.9 70 0.100 0.138 42 73 1 73 386 0.000024 0.06
61.9 300 1.2 70 0.1000.0 0.138 42 72 1 72 382 0.000024 0.06
54.3 300 1.0 70 0.100 0.138 42 63 1 63 335 0.000021 0.05
35.9 300 1.3 70 0.100 0.138 42 42 1 42 221 0.000014 0.03
51.3 300 1.0 70 0.1000.0 0.138 42 60 1 60 317 0.000020 0.05
61.4 300 1.2 70 0.100 0.138 42 71 1 71 379 0.000024 0.06
65.3 300 0.9 70 0.100 0.138 42 76 1 76 403 0.000025 0.06
60.8 300 1.2 70 0.100 0.138 42 71 1 71 375 0.000023 0.95
66.1 300 1.1 70 0.100 0.138 42 77 1 77 408 0.000025 0.06
64.6 300 0.8 70 0.100 0.138 42 75 1 75 399 0.000025 0.06
60.2 300 1.3 70 0.100 0.138 42 70 1 70 371 0.000023 0.06
80.0 300 1.7 70 0.100 0.138 42 93 1 93 494 0.000031 0.08
68.3 300 1.4 70 0.100 0.138 42 79 1 79 421 0.000026 0.07
64.2 300 0.9 70 0.100 0.138 42 74 1 74 396 0.000025 0.06
73.8 300 1.2 70 0.100 0.138 42 86 1 86 455 0.000028 0.07
70.1 300 1.5 70 0.100 0.000027 0.070.138 42 81 1 81 433
Site: Store #277, 113 State Street, Holly Hill, SCBrush Creek Elementary School, 267 Upper Brush Creek Rd., Marshall, NC
1 4
8/6/18 - 1215 30 0.0
AFVR Data Sheet - Emissions Data & Calculation
Client: Martin & Slagle
Post
PPMmea
(PPMv)
Time (h:m)Delta Time(min)8/6/18 - 8/10/18
0.01
Mass Conc
(lb/ft3)
0.000008
Response Factor:
21.6 295
Pre
PPMmea
(PPMv)
Flow
(acfm)
1.3
RH
(%)
Response
Factor
Corrected
Conc
(PPMv)
2570
Water
Vapor
(vol %)
Flow
Qstd
(dscfm)
0.100 1
Specific
Humidity
(lbW / lbDA)
Job#
0.138 25 133
Stack Dia(in):
Mass
Removed (lb)
1808-0160
42
Meters: MiniRae 3000 PID, RH pen
Dry
Conc
(PPMv)
Temp
(0 F)
Mass Conc
(mg/m3)
1000 60
1830 30
1930 60
2030 60
2130 60
2230 60
8/10/18 - 0700 510
0800 60
0900 60
1000 60
1100 60
1200 60
1300 60
1400 60
1500 60
Temp = Measured temperature (0F)Total emissions, pounds
RH = Measured relative humidity (%)Total emissions, gallons (6.25 lb/gal)
Flow = Actual Flow Volume (cfm)
Specific Humidity = data from psychrometric chart at measured Temp and RH (lb water/lb dry air) (lbW / lbDA)
Water Vapor = % water vapor on a volume basis = (Specific Humidity / 18 lb-mole H2O) / [(1 / 28.84 lb-mole dry air) + (Specific Humidity / 18 lb-mole H2O)]
Qstd = Flow volume on a dry basis at a standard temperature of 700 F = (1-Water Vapor) (Flow) [5300R / (Temp +460)]
Dry Conc = PPMv VOC on a dry basis = [PPMmea / (1-Water Vapor)]
Response Factor of OVA/TVA meter; 1 if response factor is unknown
Corrected Conc = Dry Conc PPMv VOC corrected by Response Factor = (Dry Conc) (Response Factor)
Mass Conc (mg/m3) = Mass concentration VOC as gasoline dry basis at standard temperature = (Corrected Conc) (128 mg/mg-mole / 24.07 m3/mg-mole)
Mass Conc (lb/ft3) = [Mass Conc (mg/m3)] [(6.243 * 10-8)(lb/ft3)/(mg/m3)]
Mass Removed (lb) = [Mass Conc (lb/ft3)] [Qstd (dscfm)] [Time Interval (min)]
0.06
0.15
0.000047
0.000061
758
971
718 0.000045 0.12
742
143
183
1
1
143
183
1 135
145 1
43
42
0.138
0.138
0.100
0.100
0.100 0.138 43
42
70
70
0.0
1.9
1.3
280
300
0.0 280
122.9
157.3
116.4
113.9
0.0
0.0
0.0
9.06
1.45
160.5 300 1.0 70 1860.100 0.138 42 1 186 990 0.000062 0.16
1.5 70 0.100 0.138 43 135
124.6 0.0 285 1.1 70 145 769 0.000048 0.12
295 1.7 70 0.100 0.138 132 1 132 703 0.000044 0.11
120.3 0.0 300 1.6 70 0.100 0.138 42 140 1 140 0.000046 0.12
135.8 0.0 300 0.9 70 0.100 0.138 42 158 1 158 838 0.000052 1.12
133.3 0.0 300 1.2 70 0.100 0.138 42 155 1 155 822 0.000051 0.13
126.1 0.0 300 1.0 70 0.100 0.138 42 146 1 146 778 0.000049 0.12
132.9 0.0 300 1.7 70 0.100 0.138 42 154 1 154 820 0.000051 0.13
155.6 0.0 300 1.5 70 0.100 0.138 42 181 1 181 960 0.000060 0.15
177.3 0.0 300 1.3 70 0.100 0.138 42 206 1 206 1094 0.000068 0.17
175.9 0.0 300 1.2 70 0.100 0.138 42 204 1 204 1085 0.000068 0.17
160.2 0.0 300 1.0 70 0.100 0.138 42 186 1 186 988 0.000062 0.16

APPENDIX D
Laboratory Reports
Lab Project Number:10450481
Project Name:92402146 Martin and Slagle
Client:PASI Charlotte
Phone:[phone]
ANALYTICAL RESULTS
Air
Parameters Results Report LimitUnits Analyzed CAS No. Qualifiers
Lab Sample No:92402146001
Client Sample ID:VW-1 Matrix:Air
Date Collected:10/03/18 17:25
Date Received:10/05/18 10:15
ProjSampleNum:92402146001
DF
TO-3 Air
Benzene <909 ug/m3 3570 10/11/18 10:16 71-43-2CH12.18
Ethylbenzene <1060 ug/m3 4860 10/11/18 10:16 100-41-4CH12.18
m&p-Xylene <1940 ug/m3 9710 10/11/18 10:16 179601-23-1CH12.18
o-Xylene <1060 ug/m3 4860 10/11/18 10:16 95-47-6CH12.18
Toluene <919 ug/m3 4210 10/11/18 10:16 108-88-3CH12.18
DISCLAIMER: These results have been converted to the units shown from the original units of measurement
assuming 20 degrees Celsius and 1 atmosphere pressure. Values were not rounded according to EPA
rounding rules. THC is quantitated based on the average response factors of several compounds; the nominal
molecular weight of THC used for units conversion is the average of the molecular weights of the compounds
used for quantitation.
1/16/2019Date:Page 1
SUPPLEMENTAL REPORT
Units Conversion Request
Lab Project Number:10450481
Project Name:92402146 Martin and Slagle
Client:PASI Charlotte
Phone:[phone]
ANALYTICAL RESULTS
Air
Parameters Results Report LimitUnits Analyzed CAS No. Qualifiers
Lab Sample No:92402146002
Client Sample ID:VW-2 Matrix:Air
Date Collected:10/03/18 17:40
Date Received:10/05/18 10:15
ProjSampleNum:92402146002
DF
TO-3 Air
Benzene 4550 ug/m3 3900 10/11/18 10:32 71-43-2CH12.3
Ethylbenzene 1460J ug/m3 5300 10/11/18 10:32 100-41-4CH12.3
m&p-Xylene 4410J ug/m3 10200 10/11/18 10:32 179601-23-1CH12.3
o-Xylene 2740J ug/m3 5300 10/11/18 10:32 95-47-6CH12.3
Toluene 62400 ug/m3 4600 10/11/18 10:32 108-88-3CH12.3
DISCLAIMER: These results have been converted to the units shown from the original units of measurement
assuming 20 degrees Celsius and 1 atmosphere pressure. Values were not rounded according to EPA
rounding rules. THC is quantitated based on the average response factors of several compounds; the nominal
molecular weight of THC used for units conversion is the average of the molecular weights of the compounds
used for quantitation.
1/16/2019Date:Page 2
SUPPLEMENTAL REPORT
Units Conversion Request
Lab Project Number:10450481
Project Name:92402146 Martin and Slagle
Client:PASI Charlotte
Phone:[phone]
ANALYTICAL RESULTS
Air
Parameters Results Report LimitUnits Analyzed CAS No. Qualifiers
Lab Sample No:92402146003
Client Sample ID:AS-04 Matrix:Air
Date Collected:10/03/18 17:30
Date Received:10/05/18 10:15
ProjSampleNum:92402146003
DF
TO-3 Air
Benzene 1920J ug/m3 3570 10/11/18 10:48 71-43-2CH12.18
Ethylbenzene <1060 ug/m3 4860 10/11/18 10:48 100-41-4CH12.18
m&p-Xylene <1940 ug/m3 9710 10/11/18 10:48 179601-23-1CH12.18
o-Xylene 1280J ug/m3 4860 10/11/18 10:48 95-47-6CH12.18
Toluene 13800 ug/m3 4210 10/11/18 10:48 108-88-3CH12.18
DISCLAIMER: These results have been converted to the units shown from the original units of measurement
assuming 20 degrees Celsius and 1 atmosphere pressure. Values were not rounded according to EPA
rounding rules. THC is quantitated based on the average response factors of several compounds; the nominal
molecular weight of THC used for units conversion is the average of the molecular weights of the compounds
used for quantitation.
1/16/2019Date:Page 3
SUPPLEMENTAL REPORT
Units Conversion Request
Lab Project Number:10450481
Project Name:92402146 Martin and Slagle
Client:PASI Charlotte
Phone:[phone]
ANALYTICAL RESULTS
Air
Parameters Results Report LimitUnits Analyzed CAS No. Qualifiers
Lab Sample No:92402146004
Client Sample ID:AS-05 Matrix:Air
Date Collected:10/03/18 17:30
Date Received:10/05/18 10:15
ProjSampleNum:92402146004
DF
TO-3 Air
Benzene <1010 ug/m3 3900 10/11/18 11:04 71-43-2CH12.37
Ethylbenzene <1150 ug/m3 5300 10/11/18 11:04 100-41-4CH12.37
m&p-Xylene <2120 ug/m3 10600 10/11/18 11:04 179601-23-1CH12.37
o-Xylene <1150 ug/m3 5300 10/11/18 11:04 95-47-6CH12.37
Toluene 9190 ug/m3 4600 10/11/18 11:04 108-88-3CH12.37
DISCLAIMER: These results have been converted to the units shown from the original units of measurement
assuming 20 degrees Celsius and 1 atmosphere pressure. Values were not rounded according to EPA
rounding rules. THC is quantitated based on the average response factors of several compounds; the nominal
molecular weight of THC used for units conversion is the average of the molecular weights of the compounds
used for quantitation.
1/16/2019Date:Page 4
SUPPLEMENTAL REPORT
Units Conversion Request
Lab Project Number:10450481
Project Name:92402146 Martin and Slagle
Client:PASI Charlotte
Phone:[phone]
ANALYTICAL RESULTS
PARAMETER FOOTNOTES
1/16/2019Date:Page 5
SUPPLEMENTAL REPORT
Units Conversion Request