WS-2446_3355_CA_TCR_20160531

UNDERGROUND STORAGE TANK CLOSURE
REPORT
Three Boys Citgo
5000 Old Walkertown Road
Walkertown, Forsyth County, North Carolina
May 31, 2016
Terracon Project No. 75167028

Prepared for:
Koury Properties, LLC
3502 Meadow Glen Court
Clemmons, North Carolina 27012

Prepared by:
Terracon Consultants, Inc.
Greensboro, North Carolina

Table of Contents
A. SITE INFORMATION ............................................................................................... 1
B. EXECUTIVE SUMMARY .......................................................................................... 2
C. SITE HISTORY AND CHARACTERIZATION .......................................................... 4
C.1 Site Setting ..................................................................................................................................... 4
C.2 Release Summary .......................................................................................................................... 4
C.3 Previous Investigations ................................................................................................................. 4
C.4 Water Supply Wells ........................................................................................................................ 5
C.5 Surface Water ................................................................................................................................. 5
C.6 Land Use Information .................................................................................................................... 5
D. ASSESSMENT INFORMATION ........................................................................... 5
D.1 Site Geology and Hydrogeology .................................................................................................. 5
D.2 Sampling Activities ........................................................................................................................ 6
D.2.1 Free Product Evaluation ................................................................................................................ 6
D.2.2 Soil Sampling Activities ................................................................................................................. 6
D.2.3 Analytical Results .......................................................................................................................... 7
E. CONCLUSIONS AND RECOMMENDATIONS ..................................................... 7
F. REFERENCES ......................................................................................................... 8
EXHIBITS
Exhibit 1: Site Location Map
Exhibit 2: Site Map

APPENDICES
Appendix A: Site Photographs
Appendix B: Laboratory Analytical Results and Chain of Custody Form
Underground Storage Tank Closure Report
Three Boys Citgo ■ Walkertown, North Carolina
May 31, 2016 ■ Terracon Project No. 75167028

Responsive ■ Resourceful ■ Reliable 1

UNDERGROUND STORAGE TANK CLOSURE REPORT

A. SITE INFORMATION

Date of Report: May 31, 2016
NCDEQ Incident No: 3355
Facility ID: Unknown
Site Name: Three Boys Citgo (Former Gant Oil #31)
Site Location: 5000 Old Walkertown Road
Walkertown, North Carolina 27105
Latitude: N 36.15797
Longitude: W 80.20486
UST Owner/Operator: Three Boys Citgo
5000 Old Walkertown Road
Walkertown, North Carolina 27105
[phone]

Current Property Owner: Koury and Lokas Property LLC
5000 Old Walkertown Road
Walkertown, North Carolina 27105

Current Property Three Boys Citgo
Occupant:

Consultant: Terracon Consultants, Inc. (Contact: Mark I. Miller)
7327- G W Friendly Avenue
Greensboro, North Carolina 27410
[phone]

Laboratory: Prism Laboratories, Inc. (NCDEQ No. 402)
449 Springbrook Road
Charlotte, North Carolina 28224
[phone]

Release Information: Release Date: Unknown
Estimated Quantity: Unknown
Cause of Release: Underground Storage Tank System
Source of Release: Underground Storage Tank
Size of Tank and Contents: 4,000-gal gasoline, 4,000-gal diesel
Currently Active Tanks: Three 10,000-gal gasoline tanks
Underground Storage Tank Closure Report
Three Boys Citgo ■ Walkertown, North Carolina
May 31, 2016 ■ Terracon Project No. 75167028

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I, Mark I. Miller, a Professional Geologist for Terracon Consultants, Inc., do certify that the
information contained in this report is correct and accurate to the best of my knowledge.

Mark I. Miller, P.G.
NC License No. 1715

Terracon Consultants, Inc. is licensed to practice geology and engineering in North Carolina. The
certification numbers of the corporation are C-367 and F-0869, respectively.

B. EXECUTIVE SUMMARY

The site is located on the northeastern corner of Old Walkertown Road and Davis Road in
Walkertown, North Carolina. The site address is 5000 Old Walkertown Road (Forsyth County
Tax Parcel No. 6847484623). The site contains a Three Boys convenience store with a CITGO
gasoline franchise. According to tax records, the retail structure located on the 1.42-acre parcel
was constructed in 1982. The surrounding properties are developed as residential, and railroad
tracks are located immediately south of Old Walkertown Road, south of the site.

The property has been used as a gasoline service station since approximately 1982. CITGO
currently dispenses diesel fuel and kerosene from two 4,000-gallon diesel and kerosene USTs
installed in 1982, and three newer 10,000-gallon gasoline USTs. The diesel and kerosene USTs
were in a tank pit located southwest of the convenience store, while the three newer gasoline
USTs are located in a tank pit east of the convenience store. The diesel and kerosene USTs were
connected to two fuel dispensers located beneath a canopy west of the convenience store, and
the gasoline USTs are connected to four individual dispensers located under a newer canopy
located south of the convenience store. The older tank pit located southwest of the convenience
store originally contained three 4,000-gallon USTs (one gasoline, two kerosene). As described
below, the middle kerosene UST was removed in 1986, and the gasoline UST was converted to
diesel fuel.

Leakage from the UST system and the dispenser island was first identified in 1986, when the
station was owned by Gant Oil Company (Gant). The middle kerosene UST was removed at that
time. The property was subsequently sold to Convenience USA LLC in 1999, and Exprezit! in
2003. ENVIRON is conducting soil and groundwater remediation activities at the site on behalf
of Gant’s environmental insurance company.

As part of the site remediation activities approved by the NCDEQ, Three Boys CITGO agreed to
remove the two 4,000-gallon, single-wall steel USTs most recently containing diesel fuel and
kerosene, and the associated overhead canopy and dispenser island that were installed at the
site in 1982. Removing the two USTs, the overhead canopy and the dispenser island will allow
Underground Storage Tank Closure Report
Three Boys Citgo ■ Walkertown, North Carolina
May 31, 2016 ■ Terracon Project No. 75167028

Responsive ■ Resourceful ■ Reliable 3
ENVIRON to excavate and properly dispose of petroleum-impacted soils underlying the UST
systems and install their remediation system.

Terracon and their subcontractor A&D Environmental and Industrial Services, Inc. (A&D)
mobilized to the site on April 18, 2016 to remove the overhead canopy, dispenser island and two
USTs. Three Boys Citgo had previously removed the diesel and kerosene fuel dispensers for use
on another property. A&D used a trackhoe to demolish the overhead canopy and dispenser
island, and hauled the waste materials off-site for proper disposal. A&D used a vacuum truck to
remove residual fluids from the USTs, and subsequently triple-rinsed the USTs and removed the
rinsate fluids. A&D sawcut, removed and properly disposed of the concrete and asphalt materials
overlying the two USTs. A&D then used the trackhoe to remove pea gravel backfill materials
surrounding the two steel USTs.

On April 19, 2016 a Forsyth County fire inspector visited the site and confirmed the USTs were
ready to be removed. A&D used their backhoe to lift the USTs out of the tank pit and onto flatbed
trailers, and the USTs were transported from the site pending proper disposal. Terracon did not
observe obvious evidence of holes or active leaks associated with the USTs, and soils underlying
the USTs did not exhibit obvious odors or staining potentially indicative of fuel releases. Soils
underlying the dispenser island exhibited a petroleum odor and a photoionization detector (PID)
reading of 68 parts per million (ppm). Terracon collected one soil sample from beneath the fuel
dispenser, and ENVIRON collected three soil samples from beneath the existing 4,000-gallon
diesel and kerosene USTs, and the former kerosene UST. ENVIRON selected the sample
exhibiting the highest PID reading from beneath each of the three current or former USTs for
chemical analysis. The four soil samples were analyzed for total petroleum hydrocarbons –
gasoline range organics (TPH-GRO) and TPH – diesel range organics (TPH-DRO) using USEPA
Method 8015C.

Based on information obtained during the UST closure activities, Terracon provides the following
conclusions and findings:

 Soil sample D-1, collected beneath the former fuel dispenser, contained TPH-DRO at
2,600 milligrams per kilogram (mg/kg) and TPH-GRO at 48 mg/kg. These concentrations
exceeded the NCDEQ, UST Section TPH-GRO and TPR-DRO regulatory action level of
10 mg/kg.
 Soil samples collected beneath the kerosene and diesel USTs did not contain detected
concentrations of TPH-GRO or TPH-DRO.

Based on the data presented in this UST Closure Report, Terracon recommends the following
activities be completed at the site:

 ENVIRON will excavate soils underlying the former USTs and dispenser island to a depth of
approximately 17 feet below ground surface (bgs). ENVIRON will properly dispose of soils
removed from the excavation.
Underground Storage Tank Closure Report
Three Boys Citgo ■ Walkertown, North Carolina
May 31, 2016 ■ Terracon Project No. 75167028

Responsive ■ Resourceful ■ Reliable 4
 ENVIRON will install an infiltration gallery in the base of the excavation, and will use the
infiltration gallery to introduce an approved surfactant product into the subsurface materials.
The surfactant will subsequently be removed via extraction wells.
 The results of ENVIRON’s remediation activities will be submitted by ENVIRON under
separate cover.

C. SITE HISTORY AND CHARACTERIZATION

Terracon completed this UST Closure report to summarize the findings of assessment activities
performed on April 18 and 19, 2016 at the Three Boys CITGO site located at 5000 Old Walkertown
Road in Walkertown, Forsyth County, North Carolina (Exhibit 1). This report was prepared for
the site in response to a request by Mr. Assaad El Khoury of Koury Properties, LLC as part of
planned soil and groundwater remediation activities by others.

This report was prepared in general accordance with the 15A NCAC 2L .0115 regulations and the
NCDEQ UST Section Guidelines for Site Checks, Tank Closure and Initial Response and
Abatement for UST Releases, dated March 1, 2007 and revised December 2013 and Terracon’s
Proposal No. P75167028 dated April 14, 2016. The work was performed under the supervision
of Mr. Christopher L. Corbitt, a North Carolina licensed professional geologist (North Carolina
License No. 1015).

C.1 Site Setting
The site is located on the northeastern corner of Old Walkertown Road and Davis Road in
Walkertown, North Carolina. The site address is 5000 Old Walkertown Road (Forsyth County
Tax Parcel No. 6847484623). The site contains a Three Boys convenience store with a CITGO
fuel franchise. According to tax records, the retail structure located on the 1.42-acre parcel was
constructed in 1982.

Surrounding properties to the north, south and west are developed as residential. A Zoe’s Family
Restaurant borders the site to the east, and railroad tracks are located immediately south of Old
Walkertown Road, south of the site. The site and surrounding properties are depicted in Exhibit
2.

C.2 Release Summary
Leakage from the UST system and the dispenser island was first identified in 1986, when the
station was owned by Gant Oil Company (Gant).

C.3 Previous Investigations
Previous investigations have been performed at the site by ENVIRON and other consultants.
Please refer to ENVIRON’s Site Remediation Report for additional information on previous
investigations at the site.
Underground Storage Tank Closure Report
Three Boys Citgo ■ Walkertown, North Carolina
May 31, 2016 ■ Terracon Project No. 75167028

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C.4 Water Supply Wells
It is Terracon’s understanding that water-supply wells are located within 1,000 feet of the source
area of the release. The site has been assigned a high risk ranking based on the presence of
nearby water supply wells.

C.5 Surface Water
According to the USGS topographic map, the closest surface water feature to the source area is
an unnamed, intermittent tributary of Brush Fork, which is located approximately 1,400 feet
southeast of the source area. Surface waters are depicted on Exhibit 1.

C.6 Land Use Information
The site is surrounded by commercial and residential developments.

D. ASSESSMENT INFORMATION

D.1 Site Geology and Hydrogeology
The following resources were reviewed to evaluate site-specific geological and hydrogeological
characteristics.

 Walkertown Quadrangle, North Carolina, USGS 7.5-minute series topographic map, dated
1997 (Exhibit 1).
 Geologic Map of North Carolina, dated 1985.
 Soil Survey of Forsyth County, North Carolina, US Department of Agriculture, Natural
Resources Conservation Service, Web Soil Survey via the Internet,
http://websoilsurvey.nrcs.usda.gov/app/.

The site is located within the Piedmont Physiographic Province. The Piedmont generally consists
of low, rounded hills and long rolling northeast to southwest trending ridges with incised creeks
and river channels. According to the geologic map, the site is underlain by metamorphosed
granitic rock (biotite gneiss and schist).

In-place chemical and physical weathering of parent rocks typically form residual soils in the
Piedmont region. Weathering is facilitated by the presence of fractures, joints, and less resistant
minerals in the rock. In areas not altered by erosion, alluvial deposition, or anthropogenic
activities, the typical residual soil profile consists of clay-rich unconsolidated materials at the
surface, transitioning to sandy silts and silty sands at depth. Typically, the boundary between soil
and rock is not sharply defined. This transitional zone is termed “partially weathered rock”.
According to information obtained from the Forsyth County Soil Survey, soils underlying the site
consist of Clifford sandy loam (ClB).

Underground Storage Tank Closure Report
Three Boys Citgo ■ Walkertown, North Carolina
May 31, 2016 ■ Terracon Project No. 75167028

Responsive ■ Resourceful ■ Reliable 6
In the Piedmont, groundwater generally occurs in pore spaces within soils and in the structural
features present in the underlying rock (i.e. joints, fractures, and faults). Recharge to the water
table is primarily by precipitation infiltrating the surficial, unsaturated soils (vadose zone) and
percolating downward under the influence of gravity to the water table (saturated zone). Typically,
the water table is not a level surface, but a subdued reflection of the land surface. The depth to
the water table is not consistent and is dependent upon several factors that include the amount
of rainfall, permeability of the soil, the extent of fracturing in the underlying rock, and the influences
of groundwater pumping. Groundwater typically flows in directions parallel to the ground surface
and under the influence of gravity and migrates to discharge points such as surface water
features, the toes of slopes, or natural springs.

Please note that fluctuations in the depth of the water table can be expected depending on
variations in precipitation, surface water run-off and other factors not evident at the time of our
subsurface exploration. Normally, the highest levels of the water table occur in late winter and
spring and the lowest levels occur in the late summer and fall. Based on topography, groundwater
is estimated to flow to the northwest towards an unnamed tributary of Fivemile Creek.

D.2 Sampling Activities

D.2.1 Free Product Evaluation
Free product was not encountered in the tank pit during this assessment.

D.2.2 Soil Sampling Activities
Terracon and their subcontractor A&D Environmental and Industrial Services, Inc. (A&D)
mobilized to the site on April 18, 2016 to remove the overhead canopy, dispenser island and two
USTs. Three Boys Citgo had previously removed the diesel and kerosene fuel dispensers for use
on another property. A&D used a trackhoe to demolish the overhead canopy and dispenser
island, and hauled the waste materials off-site for proper disposal. A&D used a vacuum truck to
remove residual fluids from the USTs, and subsequently triple-rinsed the USTs and removed the
rinsate fluids. A&D sawcut, removed and properly disposed of the concrete and asphalt materials
overlying the two USTs. A&D then used the trackhoe to remove pea gravel backfill materials
overlying and surrounding the two steel USTs.

On April 19, 2016 a Forsyth County fire inspector visited the site and confirmed the USTs were
ready to be removed. A&D used their backhoe to lift the USTs out of the tank pit and onto flatbed
trailers, and the USTs were transported from the site pending proper disposal. Terracon did not
observe obvious evidence of holes or active leaks associated with the USTs, and soils underlying
the USTs did not exhibit obvious odors or staining potentially indicative of fuel releases. Soils
underlying the dispenser island exhibited a petroleum odor and a PID reading of 68 ppm.
Terracon collected one soil sample from beneath the fuel dispenser, and ENVIRON collected
three soil samples from beneath the existing 4,000-gallon diesel and kerosene USTs, and the
Underground Storage Tank Closure Report
Three Boys Citgo ■ Walkertown, North Carolina
May 31, 2016 ■ Terracon Project No. 75167028

Responsive ■ Resourceful ■ Reliable 7
former kerosene UST. ENVIRON selected the sample exhibiting the highest PID reading from
beneath each of the three current or former USTs for chemical analysis.

The samples were placed into laboratory-supplied glass containers, labeled, and stored in an
insulated container packed in ice. The samples were submitted along with a chain-of-custody
form to Prism Laboratories, Inc. for analysis of TPH-GRO and TPH-DRO using USEPA Method
8015C.

The approximate locations of the former USTs and soil samples D-1, W-UST, C-UST and E-UST
are shown on the Site Map (Exhibit 2). Site photographs are presented in Appendix A.

D.2.3 Analytical Results
Based on the analytical results, Soil sample D-1, collected beneath the former fuel dispenser,
contained TPH-DRO at 2,600 milligrams per kilogram (mg/kg) and TPH-GRO at 48 mg/kg. These
concentrations exceeded the NCDEQ, UST Section TPH-GRO and TPR-DRO regulatory action
level of 10 mg/kg. Soil samples collected beneath the kerosene and diesel USTs did not contain
detected concentrations of TPH-GRO or TPH-DRO. Copies of the laboratory analytical reports
are provided in Appendix B.

E. CONCLUSIONS AND RECOMMENDATIONS

Based on information obtained during the UST closure activities, Terracon provides the following
conclusions and findings.

 Soil sample D-1, collected beneath the former fuel dispenser, contained TPH-DRO at
2,600 milligrams per kilogram (mg/kg) and TPH-GRO at 48 mg/kg. These concentrations
exceeded the NCDEQ, UST Section TPH-GRO and TPR-DRO regulatory action level of
10 mg/kg.
 Soil samples collected beneath the kerosene and diesel USTs did not contain detected
concentrations of TPH-GRO or TPH-DRO.

Based on the data presented in this UST Closure Report, Terracon recommends the following
activities be completed at the site:

 ENVIRON will excavate soils underlying the former USTs and dispenser island to a depth of
approximately 17 feet below ground surface (bgs). ENVIRON will properly dispose of soils
removed from the excavation.
 ENVIRON will install an infiltration gallery in the base of the excavation, and will use the
infiltration gallery to introduce an approved surfactant product into the subsurface materials.
The surfactant will subsequently be removed via extraction wells.
Underground Storage Tank Closure Report
Three Boys Citgo ■ Walkertown, North Carolina
May 31, 2016 ■ Terracon Project No. 75167028

Responsive ■ Resourceful ■ Reliable 8
 The results of ENVIRON’s remediation activities will be submitted by ENVIRON under
separate cover.

F. REFERENCES

NCDEQ, 2013. UST Section Guidelines for Site Checks, Tank Closure and Initial Response
and Abatement for UST Releases. NCDEQ, UST Section. March 1, 2007 and revised
December 2013.

EXHIBITS

SITE LOCATION MAP
Three Boys CITGO
5000 Old Walkertown Rd
Walkertown, NC
TOPOGRAPHIC MAP IMAGE COURTESY OF THE U.S. GEOLOGICAL SURVEY
QUADRANGLES INCLUDE: WALKERTOWN, NC (1/1/1997).
7327-G West Friendly Ave
Greensboro, NC 27410-6253
75167028
Project Manager:
Drawn by:
Checked by:
Approved by:
MIM
CLC
CLC
1”=2,000’
Three Boys
May 2016
Project No.
Scale:
File Name:
Date: 1
Exhibit MIM
APPROXIMATE
SITE LOCATION
SITE PLAN
7327-G West Friendly Ave
Greensboro, NC
DIAGRAM IS FOR GENERAL LOCATION ONLY, AND IS
NOT INTENDED FOR CONSTRUCTION PURPOSES
2
EXHIBIT
THREE BOYS CITGO
5000 Old Walkertown Road
Winston-Salem, North Carolina
Project Manager:
Drawn by:
Checked by:
Approved by:
MIM
Project No.
File Name:
Date:
Scale:
75167028
ALF
May 2016CLC
CLC
1”~ 40’
Citgo
denotes approximate site
boundary
denotes approximate location
of soil sampleDAVIS ROADWOODS
GRASS AND
DIRT
ASPHALT CONVENIENCE
STORE
GRASS
AND
SHRUBS
4,000-GAL
DIESEL UST
FORMER
4,000-GAL
KEROSENE
UST
CANOPY
KEROSENE
AND DIESEL
DISPENSERS
4,000-GAL
KEROSENE
UST
GRASS
GASOLINE
FUEL
DISPENSERS
(4 TOTAL)
GRASS
ASPHALT
CONCRETE
PAD COVERED
3X10,000-GAL
GASOLINE USTs
C-UST
E-UST
W-UST
D-1
SOIL SAMPLE ANALYTICAL RESULTS
7327-G West Friendly Ave
Greensboro, NC
DIAGRAM IS FOR GENERAL LOCATION ONLY, AND IS
NOT INTENDED FOR CONSTRUCTION PURPOSES
3
EXHIBIT
THREE BOYS CITGO
5000 Old Walkertown Road
Winston-Salem, North Carolina
Project Manager:
Drawn by:
Checked by:
Approved by:
MIM
Project No.
File Name:
Date:
Scale:
75167028
ALF
May 2016CLC
CLC
1”~ 40’
Citgo
denotes approximate site
boundary
denotes approximate location
of soil sampleDAVIS ROADWOODS
GRASS AND
DIRT
ASPHALT
CONVENIENCE
STORE
GRASS
AND
SHRUBS
4,000-GAL
DIESEL UST
FORMER
4,000-GAL
KEROSENE
UST
CANOPY
KEROSENE
AND DIESEL
DISPENSERS
4,000-GAL
KEROSENE
UST
GRASS
GASOLINE
FUEL
DISPENSERS
(4 TOTAL)
GRASS
ASPHALT
CONCRETE
PAD COVERED
3X10,000-GAL
GASOLINE USTs
SAMPLE ID: D-1
COLLECTED: 4/19/2016
TPH-EPA METHOD 8015C
TPH-GRO: 2,600 mg/kg
TPH-DRO: 48 mg/kg
*Values above action levels are in bold.
SAMPLE ID: W-UST
COLLECTED: 4/19/2016
TPH-EPA METHOD 8015C
CONSTITUENTS NOT DETECTED
SAMPLE ID: C-UST
COLLECTED: 4/19/2016
TPH-EPA METHOD 8015C
CONSTITUENTS NOT DETECTED
SAMPLE ID: E-UST
COLLECTED: 4/19/2016
TPH-EPA METHOD 8015C
CONSTITUENTS NOT DETECTED

APPENDIX A
SITE PHOTOGRAPHS

Underground Storage Tank Closure Report
Three Boys CITGO ■ Walkertown, North Carolina
Photos Taken April 18 and 19, 2016 ■ Terracon Project No. 75167028

Responsive ■ Resourceful ■ Reliable

View of Three Boys CITGO site looking NE. View of old canopy looking west.

Demolishing canopy. Canopy demolished.

Underground Storage Tank Closure Report
Three Boys CITGO ■ Walkertown, North Carolina
Photos Taken April 18 and 19, 2016 ■ Terracon Project No. 75167028

Responsive ■ Resourceful ■ Reliable

Kerosene (left) and diesel USTs, looking NE. Kerosene UST being removed from ground.

Dispenser island excavation. Loading kerosene UST onto flatbed trailer.

APPENDIX B
LABORATORY ANALYTICAL RESULTS AND
CHAIN-OF-CUSTODY FORM

This data package contains the analytical results for the project identified above and includes a Case Narrative, Sample
Results and Chain of Custody. Unless otherwise noted, all samples were received in acceptable condition and processed
according to the referenced methods.
Data qualifiers are flagged individually on each sample. A key reference for the data qualifiers appears at the end of this case
narrative.
NC Certification No. 402
SC Certification No. 99012
NC Drinking Water Cert No. 37735
Case Narrative
05/03/2016
Terracon Consultants - Greensboro
Mark Miller
7327 W. Friendly Drive
Greensboro, NC 27410
Project: 3 Boys Citgo
Lab Submittal Date: 04/25/2016
Prism Work Order: 6040460
VA Certification No. 460211
DoD ELAP: L-A-B Accredited Certificate No. L2307
ISO/IEC 17025: L-A-B Accredited Certificate No. L2307
Please call if you have any questions relating to this analytical report.
Respectfully,
PRISM LABORATORIES, INC.
President/Project Manager
Reviewed ByRobbi A. Jones Robbi A. Jones
President/Project Manager
Data Qualifiers Key Reference:
DO Surrogates diluted out.
Method Detection LimitMDL
Below Reporting LimitBRL
Relative Percent DifferenceRPD
*Results reported to the reporting limit. All other results are reported to the MDL with values between MDL and
reporting limit indicated with a J.
This report should not be reproduced, except in its entirety, without the written consent of Prism Laboratories, Inc.
449 Springbrook Road - P.O. Box 240543 - Charlotte, NC 28224-0543
Phone: [phone] - Toll Free Number: 1-800/529-6364 - Fax: [phone] Page 1 of 8
Sample Receipt Summary
05/03/2016
Prism Work Order: 6040460
Client Sample ID MatrixLab Sample ID Date Sampled Date Received
6040460-01 04/19/16D-1 04/25/16Solid
Samples were received in good condition at 1.3 degrees C unless otherwise noted.
This report should not be reproduced, except in its entirety, without the written consent of Prism Laboratories, Inc.
449 Springbrook Road - P.O. Box 240543 - Charlotte, NC 28224-0543
Phone: [phone] - Toll Free Number: 1-800/529-6364 - Fax: [phone] Page 2 of 8
Client ID ResultParameterMethod UnitsPrism ID
Prism Work Order: 6040460
05/03/2016
Summary of Detections
2600 mg/kg dry6040460-01 D-1 Diesel Range Organics *8015C
48 mg/kg dry6040460-01 D-1 Gasoline Range Organics *8015C
This report should not be reproduced, except in its entirety, without the written consent of Prism Laboratories, Inc.
449 Springbrook Road - P.O. Box 240543 - Charlotte, NC 28224-0543
Phone: [phone] - Toll Free Number: 1-800/529-6364 - Fax: [phone] Page 3 of 8
Laboratory Report
05/03/2016
ResultParameter Batch
ID
Report
Limit
Analysis
Date/Time
MethodDilution
Factor
Units MDL Analyst
7327 W. Friendly Drive
Project: 3 Boys CitgoTerracon Consultants - Greensboro
Greensboro, NC 27410
Attn: Mark Miller
Sample Matrix: Solid
Client Sample ID: D-1
Prism Sample ID: 6040460-01
Prism Work Order: 6040460
Time Collected: 04/19/16 09:00
Time Submitted: 04/25/16 07:30
Diesel Range Organics by GC/FID
2600 *8015C P6D0498504804/29/16 14:20 ZRCmg/kg dry 110Diesel Range Organics
Surrogate Recovery Control Limits
49-1241060 %o-Terphenyl DO
Gasoline Range Organics by GC/FID
48 *8015C P6D0520505.8 4/28/16 20:03 ANGmg/kg dry 0.88Gasoline Range Organics
Surrogate Recovery Control Limits
50-137118 %a,a,a-Trifluorotoluene
General Chemistry Parameters
72.6 *SM2540 G P6D053210.100 4/27/16 16:00 JLB% by
Weight
0.100% Solids
This report should not be reproduced, except in its entirety, without the written consent of Prism Laboratories, Inc.
449 Springbrook Road - P.O. Box 240543 - Charlotte, NC 28224-0543
Phone: [phone] - Toll Free Number: 1-800/529-6364 - Fax: [phone] Page 4 of 8
5/3/16
Level II QC Report
7327 W. Friendly Drive
Project: 3 Boys CitgoTerracon Consultants - Greensboro
Greensboro, NC 27410
Attn: Mark Miller
Prism Work Order: 6040460
Time Submitted: 4/25/2016 7:30:00AM
Result Limit
Reporting
Units Level
Spike
Result
Source
%REC
%REC
Limits RPD
RPD
Limit Notes Analyte
Gasoline Range Organics by GC/FID - Quality Control
Batch P6D0520 - 5035
Blank (P6D0520-BLK1)Prepared & Analyzed: 04/28/16
Gasoline Range Organics mg/kg wetBRL5.0
mg/kg wet 5.000 50-137Surrogate: a,a,a-Trifluorotoluene 1155.75
LCS (P6D0520-BS1)Prepared & Analyzed: 04/28/16
Gasoline Range Organics mg/kg wet56.4 5.0 50.00 41-138113
mg/kg wet 5.000 50-137Surrogate: a,a,a-Trifluorotoluene 1155.75
LCS Dup (P6D0520-BSD1)Prepared & Analyzed: 04/28/16
Gasoline Range Organics mg/kg wet63.6 5.0 50.00 2041-138127 12
mg/kg wet 5.000 50-137Surrogate: a,a,a-Trifluorotoluene 1266.30
This report should not be reproduced, except in its entirety, without the written consent of Prism Laboratories, Inc.
449 Springbrook Road - P.O. Box 240543 - Charlotte, NC 28224-0543
Phone: [phone] - Toll Free Number: 1-800/529-6364 - Fax: [phone] Page 5 of 8
5/3/16
Level II QC Report
7327 W. Friendly Drive
Project: 3 Boys CitgoTerracon Consultants - Greensboro
Greensboro, NC 27410
Attn: Mark Miller
Prism Work Order: 6040460
Time Submitted: 4/25/2016 7:30:00AM
Result Limit
Reporting
Units Level
Spike
Result
Source
%REC
%REC
Limits RPD
RPD
Limit Notes Analyte
Diesel Range Organics by GC/FID - Quality Control
Batch P6D0498 - 3546
Blank (P6D0498-BLK1)Prepared: 04/27/16 Analyzed: 04/28/16
Diesel Range Organics mg/kg wetBRL7.0
mg/kg wet 1.333 49-124Surrogate: o-Terphenyl 861.15
LCS (P6D0498-BS1)Prepared: 04/27/16 Analyzed: 04/28/16
Diesel Range Organics mg/kg wet58.9 7.0 66.67 55-10988
mg/kg wet 1.333 49-124Surrogate: o-Terphenyl 841.12
LCS Dup (P6D0498-BSD1)Prepared: 04/27/16 Analyzed: 04/28/16
Diesel Range Organics mg/kg wet58.5 7.0 66.67 2055-10988 0.7
mg/kg wet 1.333 49-124Surrogate: o-Terphenyl 841.12
This report should not be reproduced, except in its entirety, without the written consent of Prism Laboratories, Inc.
449 Springbrook Road - P.O. Box 240543 - Charlotte, NC 28224-0543
Phone: [phone] - Toll Free Number: 1-800/529-6364 - Fax: [phone] Page 6 of 8
5/3/16
Level II QC Report
7327 W. Friendly Drive
Project: 3 Boys CitgoTerracon Consultants - Greensboro
Greensboro, NC 27410
Attn: Mark Miller
Prism Work Order: 6040460
Time Submitted: 4/25/2016 7:30:00AM
Result Limit
Reporting
Units Level
Spike
Result
Source
%REC
%REC
Limits RPD
RPD
Limit Notes Analyte
General Chemistry Parameters - Quality Control
Batch P6D0532 - Solids, Dry Weight
Blank (P6D0532-BLK1)Prepared & Analyzed: 04/28/16
% Solids % by Weight1000.100
Sample Extraction Data
Prep Method: 3546
Lab Number Batch Date/TimeInitialFinal
P6D04986040460-01 04/27/16 10:1530.03 1g mL
Prep Method: 5035
Lab Number Batch Date/TimeInitialFinal
P6D05206040460-01 04/28/16 8:045.9 5g mL
Prep Method: Solids, Dry Weight
Lab Number Batch Date/TimeInitialFinal
P6D05326040460-01 04/27/16 16:0030 30g g
This report should not be reproduced, except in its entirety, without the written consent of Prism Laboratories, Inc.
449 Springbrook Road - P.O. Box 240543 - Charlotte, NC 28224-0543
Phone: [phone] - Toll Free Number: 1-800/529-6364 - Fax: [phone] Page 7 of 8
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