WS-6081_22332_CA_CAP_20031017

CORRECTIVE ACTION PLAN
lSA NCAC 2L.0106 (h)
TEXACO FOOD MART #2
1700 COTTON GROVE ROAD (NC HWY 8)
LEXINGTON, DAVIDSON COUNTY, NORTH CAROLINA
GROUNDWATER INCIDENT NO. 22332
John Long
Project Manager
SITE RANKING: HIGH RISK
SHIELD PROJECT #1001289
For:
Techno, LLC for
Holding Brothers, Inc.
PO Drawer 647
Concord, NC 28026
By:
Shield Engineering, Inc.
4301 Taggart Creek Road
Charlotte, North Carolina
October 17, 2003
Corrective Action Plan
Texaco Food Mart #2
October 17, 2003
Page ii
Lexington, Davidson County, North Carolina
TABLE OF CONTENTS
Page No.
EXECUTIVE SUMMARY ................................................................................................. iv
1.0 INTRODUCTION ...................................................................................................... 1
1.1 General Site Information .................................................................................... I
1.2 Purpose of Corrective Action ............................................................................ .3
1.3 Initial Remedial Actions ................................................................................... .3
1.4 Contamination Assessment ................................................................................ 6
1.5 Permits/Certificates ............................................................................................ 6
2.0 CORRECTIVE ACTION PLAN OBJECTIVE ..................................................... 7
2.1 Soil Cleanup Target Concentrations .................................................................. 7
2.2 Groundwater Cleanup Target Concentrations .................................................... 7
3.0 EXPOSURE ASSESSMENT .................................................................................... 8
3.1 Summary of Water Supply and Land Use ......................................................... 8
3.2 Utilities ............................................................................................................... 8
3 .3 Potential Receptors ............................................................................................ 8
4.0 EVALUATION OF REMEDIAL ALTERNATIVES ............................................ 9
4.1 Objectives of the Corrective Action Plan .......................................................... 9
4.2 Evaluation of Remedial Alternatives ................................................................. 10
4.2.1 Preliminary Feasibility Study .............................................................. .! 0
4 .2 .2 Containment Pumping Technology ...................................................... I 0
4.2.3 Excavation and Treatment ................................................................... .11
4.2.4 Air Sparging .......................................................................................... 11
4.2.5 Soil Vapor Extraction ........................................................................... 11
4.2.6 Innovative Technologies ....................................................................... 12
4.2.7 Natural Attenuation ............................................................................... 12
4.2.8 Possibility of Connecting Adjacent Property Owners to Municipal
Water ................................................................................................ 12
4.3 Feasibility Studies and Basis ofDesign ................................................................. 12
4.3.1 Air Sparging (AS)/SVE Tests ............................................................... 12
5.0 PROPOSED CORRECTIVE ACTION PLAN ...................................................... 15
5. I SVE System Design ........................................................................................... 15
5.1.1 SVEWells .............................................................................................. 15
5.1.2 Equipment Components ........................................................................ 15
5 .2 Groundwater System Design ............................................................................. 16
5.2.1 Air Sparging Wells ............................................................................... 16
5.2.2 Air Sparging System Components ........................................................ 17
5.3 Maintenance Plan and Implementation Schedule ........................................... , .. 18
5.4 System Security and Safety Measures ............................................................... 19
Corrective Action Plan
Texaco Food Mart #2
October 17, 2003
Page iii
Lexington, Davidson County, North Carolina
TABLE OF CONTENTS (Cont.)
6.0 MONITORING, SYSTEM EVALUATION PLAN AND REPORTING ............. 20
7.0 PERMITS ................................................................................................................... 21
7.1 Public Notification ............................................................................................. 21
7.2 DOT Encroachment ........................................................................................... 21
8.0 LIMITATIONS .......................................................................................................... 22
9.0 REFERENCES ........................................................................................................... 23
Figure I:
Figure 2:
Figure 3:
Figure 4:
Figure 5:
Figure 6:
Figure 7:
Figure 8:
Figure 9:
Figure JO:
Figure 11:
Figure 12:
Figure 13:
Figure 14:
Figure 15:
Figure 16:
Figure 17:
Figure 18:
Figure 19:
Table l:
Table 2:
Table 3:
Table 4:
Appendix A:
Appendix B:
Appendix C:
Appendix D:
Appendix E:
Appendix F:
Appendix G:
Site Location Map
1,500' Radius Map
Site Map
FIGURES
Soil Sample Location Map
Groundwater Elevation Contour Map
Subsurface Profile A-A'
Subsurface Profile B-B'
Benzene Isoconcentration Map
Toluene Isoconcentration Map
Ethylbenzene Isoconcentration Map
Total Xylenes lsoconcentration Map
Total BTEX Isoconcentration Map
1,2-Dichloroethane Isoconcentration Map
EDB lsoconcentration Map
Naphthalene lsoconcentration Map
Typical SVE Well Diagram
Treatment System P & ID
Remediation System Layout Map
Typical AS Well Diagram
TABLES
Summary of Historical Analytical Results, Soil Samples
Summary of Well Construction and Historical Groundwater Elevation Data
Summary of Analytical Results, Groundwater Samples
Adjacent Property Owner and Receptor Information
APPENDICES
Laboratory Analytical Data
Boring Logs and Well Construction Records
Feasibility Testing Data
Cost Estimate for Proposed Remediation System
System Basis of Design
Engineering Cut Sheets/ System Specifications
Notification Letters
H:\Engineeri11g (01 J0)\2000\1001289\CAP\Texaco Food Mart #2 CAP.doc
Corrective Action Plan
Texaco Food Mart #2
Lexington, Davidson County, North Carolina
EXECUTIVE SUMMARY
Facility Information:
Risk Classification:
Land Use Category:
Ownership of Underground
Storage Tank (UST):
Primary Contact Person:
Property Owner:
Texaco Food Mart #2
1700 Cotton Grove Road
Lexington, Davidson County, N.C.
Facility ID# 0-01 I 600
GWI #22332
High
Industrial / Commercial
Techno, LLC for Holding Brothers, Inc.
PO Drawer 64 7
Concord, North Carolina 28026
[phone]
Mr. David Holding
Techno, LLC for Holding Brothers, Inc.
PO Drawer 647
Concord, North Carolina 28026
[phone]
Latitude: 35°46'4/"N
Longitude: 80° 15' 35" w
Source Information:
October 17, 2003
Page iv
Source Type: Low and High boiling point hydrocarbons (gasoline and kerosene).
Containers: The gasoline and kerosene underground storage tanks (USTs) and the west
side gasoline dispenser and kerosene dispenser areas.
Quantity of Release: Unknown.
Initial Abatement/Emergency Response Information
Tank Tightness Testing: After contamination had been detected in soil samples on site, a tank
tightness test was run on the existing tanks. Results of the test were submitted to the NCDENR
WSRO. The results of the test showed that no initial abatement measures were necessary.
Soil Removed: No soil has been removed from the site.
Corrective Action Plan
Texaco Food Mart #2
Lexington, Davidson County, North Carolina
October 17, 2003
Page v
Liquid Phase Petroleum Hydrocarbons (LPH): No LPH has been detected at the project site.
Sampling/Investigation Results
Maximum concentrations of petroleum compounds include:
Soil
Constituents Concentration Samele I.D. Date Sam12led
Benzene 0.053 mg/kg B-32 (15-17') 4/26/02
Toluene 15.0 mg/kg B-30 (15-17') 4/26/02
Ethylbenzene 19 mg/kg B-30 (15-17') 4/26/02
Total Xylenes 120mg/kg B-30 (15-17') 4/26/02
N-Butylbenzene 6.2 mg/kg MW-1 (10-12') 7/31/01
Sec-Butylbenzene 9.0 mg/kg MW-1 (I0-12') 7/31/01
1,2-Dibromoethane 0.01 mg/kg MW-1 (5-7') 7/31/01
MTBE 1.6 mg/kg MW-1 (20-22') 7/31/01
1,2-Dichloroethane 0.025 mg/kg MW-2 (10-12') 7/31/01
Acetone 5.7 mg/kg MW-2 (20-22') 7/31/01
Isopropylbenzene 3.8 mg/kg B-30 (15-17') 4/26/02
Naphthalene 21 mg/kg B-30 (15-17') 4/26/02
2-Methylnaphthalene 5.8 mg/kg B-30 (15-17') 4/26/02
N-Propylbenzene 16 mg/kg B-30 (15-17') 4/26/02
1,2,4-Trimethylbenzene 91 mg/kg B-30 (15-17') 4/26/02
1,3,5-Trimethylbenzene 51 mg/kg MW-2 (15-17') 7/31/01
CS -C8 Aliphatics 130 mg/kg B-30 (15-17') 4/26/02
Cl 1 -C22 Aromatics 170mg/kg MW-I (l0-12') 7/31/01
TPH (by Method 5030) 14,000 mg/kg B-I 9 (3-3.5 ') 9/26/00
TPH (by Method 3550) 4,100 mg/kg B-20 (2.5-3 ') 9/26/00
-Other various analytes can be seen in the attached data.
Groundwater
The highest historical concentrations of dissolved phase petroleum hydrocarbons reported in
groundwater samples:
Constituents: Concentration Well I.D. Date Sameled
Benzene 13,000 ug/1 MW-2 7/31/01
Toluene 38,000 ug/1 MW-2 7/31/01
Ethylbenzene 3,600 ug/1 MW-2 7/31/01
Total Xylenes 16,700 ug/1 MW-2 4/30/03
1,2-Dichloroethane 1,700 ug/1 MW-2 4/30/03
EDB 720 ug/1 MW-2 7/31/01
Naphthalene 1400 ug/1 MW-2 4/30/03
Corrective Action Plan
Texaco Food Mart #2
October 17, 2003
Page vi
Lexington, Davidson County, North Carolina
•
CS -CS Aliphatics 81,000 ug/1 MW-2
C9 -Cl 2 Aliphatics 28,000 ug/1 MW-2
C9-ClO Aromatics I 1,000 ug/1 MW-3
CJ 1 -C22 Aromatics 710 ug/1 MW-3
-Other various analytes can be seen in the attached data.
7/31/01
7/31/01
10/10/01
I 0/10/01
Site Hydrogeology Summary
Groundwater Flow rate (ft/yr): Estimated groundwater velocity is approximately
0.65 ft./yr.
Direction of groundwater flow:
Hydraulic gradient:
Generally towards the northeast.
The hydraulic gradient is approximately 0.0033
feet/foot between MW-4 and MW-5.
Area Receptors
Potential Receptors: There are two (2) confirmed drinking water supply wells and five (5) inactive
supply wells located within 1,000 feet of the source area. The closest drinking water supply well
is located approximately 450 feet south of the site. Refer to Figure 2 for locations of the receptors.
Populations: Residences
Schools
Churches
Parks
Hospitals
Others
-Present within 500 feet of the site.
-None present within 500 feet of the site.
-None present within 500 feet of the site.
-None present within 500 feet of the site.
-None present within 500 feet of the site.
-A Wendy's Fast Food Restaurant is located immediately to the north.
Other commercial properties are located along Cotton Grove Road
(NC Highway 8). A gasoline station (Amoco or Rushco #3) with a
documented release is located immediately across Cotton Grove
Road.
Alternative Water Supply: Potable water to the site and surrounding properties is provided by a
municipal water supply system. However, three (3) private water supply wells were identified
within 1,500 feet of the project site.
Surface Water bodies: No surface water body was observed in the field or on the topographic map
within 500-feet of the source area.
Wellhead Protection Areas: Based on information provided by NCDENR there are no wellhead
protection areas in Davidson County.
Deep Aquifers in the Coastal Plain Hydrographic Region: Not applicable
Corrective Action Plan
Texaco Food Mart #2
Lexington, Davidson County, North Carolina
Conclnsions
October 17, 2003
Page vii
• Concentrations of one or more constituents of concern (COC' s) including benzene, n-
butylbenzene, sec-butylbenzene, 1,2 dibromoethane, ethylbenzene, naphthalene, n-
propylbenzene, toluene, 1,2,4 trimethylbenzene, 1,3,5 trimethylbenzene, xylenes, 2-butanone,
1,2, dichloroethane, acetone, isopropylbenzene, MTBE, 2-methylnaphthalene, and CI 1-C22
Aromatics that exceeded the Maximum Soil Contaminant Concentrations (MSCC's) for "soil-to-
groundwater" standards were reported in soil samples collected at the site.
• Concentrations of one or more BTEX constituents, 1,2 DCE, EDB, Naphthalene, C5-C8
Aliphatics, C9-Cl2 Aliphatics, C9-CI0 Aromatics, and Cl l-C22 Aromatics were detected in
monitoring wells MW-I, 2, and 3 and T-1 during groundwater sampling events conducted at the
site.
• Two (2) privately owned water supply wells were identified with a 1,000-foot radius of the
source area.
• The horizontal and vertical extents of petroleum impacted soil and groundwater have been
reasonably defined at the Texaco Food Mart #2 project site. Groundwater contamination is
observed to be migrating outward from the source area in a northern direction.
• Due to the extent of the contamination in both the soil and groundwater, use of a soil vapor
extraction system in coajunction with an air sparging system is proposed as the most economical
and technically efficient remedial approach.
• The estimated cost for the system is approximately $110,000 including the installation of
proposed remediation wells and trenches.
• A schedule for the implementation of the proposed remediation will allow for the request for
competitive bids in approximately 60 days from the date of CAP approval, with subsequent
system construction/start up in approximately 120 days and sequentially subsequent system
activation in approximately 240 days from CAP approval.
Corrective Action Plan
Texaco Food Mart #2
Lexington, Davidson County, North Carolina
1.1 General Site Information
I. Site Information
1.0 INTRODUCTION
A. Name, address, and phone number of site:
Texaco Food Mart #2
1700 Cotton Grove Road (NC Highway 8)
Davidson County, North Carolina
B. Groundwater incident number:
NCDENR incident: 22332
C. Facility ID Number:0-011600
October 17, 2003
Page I
D. Risk based classification: High due to two (2) active water supply wells located
within 1,000 feet of the source area.
E. Land use: Commercial/Industrial
F. Name, address, and phone number of party responsible for the release:
Techno, LLC for Holding Brothers, Inc.
Mr. David Holding
PO Drawer 647
Rowan County, North Carolina 28026
[phone]
II. Underground Storage Tank Information
Techno, LLC for Holding Brothers, Inc.
Mr. David Holding
PO Drawer 64 7
Rowan County, North Carolina 28026
[phone]
III. Release Information
A. Date released discovered:
The release was discovered in February 1999
B. Estimated quantity of the release:
The exact quantity of the release is unknown.
Corrective Action Plan
Texaco Food Mart #2
Lexington, Davidson County, North Carolina
C. Cause and source of the release:
October 17, 2003
Page2
The exact source of the release is unknown. Based on information acquired, it is
believed that the release was any one, or a combination of two (2) -8,000-gallon,
three (2)-4,000-gaUon gasoline, (1) 4,000-gallon diesel or one (1)-1,000-gallon
kerosene underground storage tanks located on site as well as the gasoline/kerosene
lines and dispensers.
D, Size and contents ofUST(s) from which release may have potentially occurred:
2 -8,000-gallon, 2 -4,000-gallon gasoline, 1-4,000-gallon diesel and I -I ,000-
gallon kerosene. (All tanks are in-use)
E. Latitude and longitude of the release:
Latitude 35° 46' 41N
Longitude 80° 15' 35W
IV. Consultant/Contractor:
Name, address, and phone number of consultant:
Shield Engineering, Inc.
4301 Taggart Creek Road
Charlotte, NC 28208
704-394-6913
2. Seal and signature of certifying P.E. and/or L.G.:
Site Location and Usage: The Texaco Food Mart #2 project site, Groundwater Incident No. 22332,
is located at 1700 Cotton Grove Road in the city of Lexington, Davidson County, North Carolina
(Refer to Figure 1 -Site Location Map). The Texaco Food Mart #2 facility is currently an active
petroleum retail facility and convenience store. The project site is surrounded by residential
properties. Refer to Figure 2 for surrounding property owners and potential receptors. Refer to
Figure 3 for a site map of the project site.
Corrective Action Plan
Texaco Food Mart #2
Lexington, Davidson County, North Carolina
1.2 Purpose of Corrective Action
October 17, 2003
Page 3
This Corrective Action Plan (CAP) is submitted on behalf of Techno, LLC for Holding Brothers,
Inc., the former underground storage tank (UST) owner at the Texaco Food Mart #2 project site, and
as required by ISA NCAC 2L.0l 15. Corrective action at the site will be conducted in accordance
with 15A NCAC 21.0106 (h) and will comply with the Notice of Regulatory Requirements (NORR)
dated May 9, 2002 by the North Carolina Department of Environment and Natural Resources
(NCDENR) -Winston Salem Regional Office (WSRO). This Corrective Action Plan addresses the
petroleum release at the subject site.
In addition, the following regulations and guidelines apply to the site:
1. Oil Pollution and Hazardous Substances Control Act, North Carolina General
Statutes 143-215.75.
2. Groundwater Classifications and Standards, North Carolina Administrative Code
(NCAC), Title !SA, Chapter 2, Subchapter 2L.
3. Criteria and Standards Applicable to Underground Storage Tanks, NCAC, Title
I SA, Chapter 2, Subchapter 2N.
1.3 Initial Remedial Actions
In February 1999, Ogden Environmental and Engineering Services, in accordance with the NCDOT
conducted a preliminary assessment at the facility. Preliminary assessment revealed groundwater
contamination present in the soil and groundwater above NCDENR Action Levels.
In response to the assessment results, the NCDENR requested additional information including
verification that all UST systems at the facility meet the construction standards set forth in 15A
NCAC 2N .0301 & .0302. It was also requested to verify that the UST systems met upgrade
requirements for both spill and overfill protection in accordance with 15A NCAC 2N.0401, .0501,
.0502, and .0503 and that the UST systems meet performance test requirements for cathodic
protection, tank/pipe tightness, leak detection, and/or internal inspections.
This information was provided to the NCDENR within 30 days including documentation on the UST
system passing the tank/line tightness test.
In a letter dated August 31, 2000, the NCDENR stated that analytical data received on June 2, 1999
from soil and groundwater samples indicated a release or discharge from a regulated petroleum UST
system might have occurred at the facility. The NCDENR requested that a site check in accordance
with 40 CFR 280.52(b) (as incorporated by 15A NCAC 2N .0603) be submitted within 30 days of
the date of the receipt of this letter.
Corrective Action Plan
Texaco Food Mart #2
Lexington, Davidson County, North Carolina
October 17, 2003
Page 4
On September 22, 2000, Shield Environmental Associates Inc now Shield Engineering, Inc, (Shield)
advanced soil borings SB-I through SB-29 and collected soil samples accordingly, Evidence of a
release was detected at the site in soil samples collected from soil borings, B-17, B-18, B-19, B-20,
and B-21. The laboratory results showed contamination above the NCDENR action levels. The
results of this subsurface investigation were submitted by Shield to the NCDENR in a 45-Day
Report dated May I 0, 200 I.
In a letter dated June 25, 200 I, the NCDENR acknowledged they had received the 45-Day Report.
In addition, the NCDENR stated that a Limited Site Assessment (LSA) Report should be completed
within 120 days of the date of the receipt of their notice.
On July 31, 2001, eight soil samples {MW-I (5' -7'), MW-I (10' -12'), MW-2 (15'-17'), MW-I (20' -
22'), MW-2 (5' -7'), MW-2 (10'-12'), MW-2 (15'-17'), MW-2 (20'-22')) were collected using a split
spoon sampling device. Laboratory analyses for MW-I in the source area for kerosene were
performed for volatile organics using the SW846 Method 8260B, for semi-volatile organics using
the SW846 Method 8270C and for volatile petroleum hydrocarbons (VPH), and extractable
petroleum hydrocarbons (EPH) using the Massachusetts Department of Environmental Protection
(MADEP) Method, Laboratory analyses for MW-2 in the source area for gasoline were performed
for volatile organics using the SW846 Method 8260B and for VPH using the MADEP Method,
Since petroleum hydrocarbon constituents were detected ten times higher than the 2L Standards in
MW-I and MW-2, three additional monitoring wells (MW-3, MW-4, and T-1) were installed in
accordance with NCDENR requirements. Shield intended that the proposed monitoring well
locations follow the NCDENR's up-gradient and down-gradient requirements for the LSA II without
a verified groundwater flow direction.
On October 8, 2001, monitoring well MW-3 was installed sidegradient of the source area and
monitoring well MW-4 was installed and is downgradient of the source area. In addition, one
vertical extent well (T-1) was installed. Bedrock was not encountered to a depth of 90 feet below
grade during installation. The placement of the monitoring wells was limited due to the location of
the plume near the right-of-way and Cotton Grove Road (NC Highway 8). The Phase I/II LSA
report was submitted to the NCDENR on October 29, 2001.
In a letter dated November 2, 2001, the NCDENR acknowledged they had received the LSA Report
and stated that the site is classified as a "high-risk". In addition, the NCDENR stated that the site's
land use is classified as industrial/commercial. The NCDENR stated in this letter that a CSA Report
should be completed within 90 days of the date of the receipt of their notice. Environmental
investigations relating to the release, as well as information regarding the extent of soil and
groundwater affected by the release are discussed in this report.
On April 4, 2002, offsite monitoring wells MW-5 and MW-6 were installed on the north and south
side of source area along Cotton Grove Road to delineate boundaries of soil and groundwater
contamination. Laboratory analytical data revealed no Constituent of Concern (COC) concentrations
above the laboratory detection levels. No FID readings were taken during drilling.
Corrective Action Plan
Texaco Food Mart #2
Lexington, Davidson County, North Carolina
October 17, 2003
Page 5
Based on analytical results, groundwater contamination has been detected at the site above 2L
Standards in monitoring wells MW-I, MW-2, MW-3, and vertical extent well T-1, and above the
GCL's in MW-2. No COC concentrations were detected in MW-4, MW5, and MW-6, therefore
delineating the horizontal extent of the groundwater plume.
Mr. Michael Rogers of the NCDENR was contacted prior to the soil delineation activities to confirm
that the soils are required to be defined/cleaned up to the soil to groundwater or residential
Maximum Soil Contamination Concentrations (MSCC) whichever are lower. Mr. Rogers confirmed
that soil needed to be defined to the soil to groundwater or residential MSCCs whichever are lower.
On April 12, 2002 Shield supervised the advancement of six additional soil borings (B-30 through
B-35) using a GeoProbe™ rig to further delineate the soil contamination at the site. Soil samples
were collected and analyzed using EPA Method 8260 (by 5035), 8270 and for VPH and EPH using
the MADEP method. The horizontal extent of soil contamination was defined to be in the middle
of Cotton Grove Road between the two gasoline stations/convenience stores.
Based on soil laboratory analytical dated April 26, 2002, evidence of COC concentrations exceeding
the MSCC (Soil to Groundwater category) were detected at the site. The soil samples collected from
MW-I (5-7'), MW-I (10-12'), MW-I (20-22'), MW-2 (5-7'), MW-2 (10-12'), MW-2 (15-17'),
MW-2 (20-22'), B-30, and B-32 were above the soil to groundwater and/or residential MSCCs.
Soil sample B-32 (15-17') contained 0.053 parts per million of benzene, which is above the soil to
groundwater category of the MSCCs. Soil sampling performed at the Ruscho #3 (1701 Cotton
Grove Road) on MW-I (3-5'), MW-I (8-10'), and MW-I (13-15'), showed that only methyl tert
butyl ethylene (MTBE) was present on that property at 0.072 mg/kg, 0.200 mg/kg, and 0.270 mg/kg,
respectively. MTBE was NOT detected in soil sample B-32 (15-17'), therefore, the horizontal
extent of soil contamination is defined in the middle of Cotton Grove Road between the two gasoline
stations/convenience stores.
Slug tests were performed in Type II monitoring wells MW-I and MW-2 on April 23, 2002.
Recovery in the wells was measured with an In-Situ Mini Troll data logger. Data from the tests was
evaluated using the standard Bouwer and Rice analytical method and calculating using
AQTESOL VE™ for Windows program by Hydrosolv™. The average estimated groundwater
velocity approximately 0.65 ft/year for MW-I and MW-2.
The Comprehensive Site Assessment Report was submitted May 2002 to NCDNR.
An NORR was issued by the NCDNR on May 9, 2002 to complete a Corrective Action Plan.
During preparation of the Corrective Action Plan Shield performed a site wide sampling event in
order to obtain groundwater analytical data from the monitoring wells during the same timeframe.
This sampling event was performed on April 30, 2003, results of which are included in Table 3.
Laboratory results are included in Appendix A.
Corrective Action Plan
Texaco Food Mart #2
Lexington, Davidson County, North Carolina
1.4 Contamination Assessment
October 17, 2003
Page6
Soil: Based on the CSA report dated May 2002, soil samples collected in the vicinity of the
kerosene and gasoline USTs and dispensers indicate concentrations ofCOC's which exceeded the
"soil-to-groundwater" MSCC's allowed by the Guidelines. No soil was excavated from the site. See
Figure 4 for the approximate extent of soil contamination. Refer to Table I for a summary of
historical soil sampling results.
Groundwater: A total of six (6) Type II monitoring wells and one (1) Type III monitoring well have
been installed at the Texaco Food Mart #2 project site as part of assessment activities. Five (5)
additional wells have been installed for the purpose of remedial action studies. The locations of
these wells are shown on Figure 3. Boring logs and well construction records for these remedial
wells (AS-I, VE-I, and TW-2, 3, and 4) are included as Appendix B. Historical groundwater
elevations and well construction is summarized as Table 2.
Laboratory analytical data from the groundwater sampling event on April 30, 2003 indicate
concentrations of petroleum hydrocarbon constituents exceeding the maximum allowable
concentrations (MAC's) specified in 15A NCAC 21.0202 (21) in groundwater samples collected
from monitoring wells MW-I through MW-3 and T-1. See Table 3 for a summary of groundwater
analytical results.
Figure 5 presents a groundwater elevation contour map based on water levels obtained on April 22,
2002. A summary of groundwater elevations used to generate Figure 5 are provided in Table 2.
Based on conclusions presented in the CSA, the vertical and horizontal extent of soil and
groundwater contamination has been reasonably defined at the Texaco Food Mart #2 project site.
The estimated vertical extent of the petroleum-impacted groundwater is shown on subsurface
profiles A-A' and B-B' presented as Figures 6 and 7, respectively. The estimated horizontal extent
of petroleum constituents benzene, toluene, ethyl benzene, total xylenes, total BTEX, MTBE, I ,2-
dichloroethane, EDB, and naphthalene in groundwater, based on data from past sampling events, is
shown on Figures 8 through 16 respectively.
1.5 Permits/Certificates
No certificates of approval, soil remediation permits, or interim discharge permits have been required
at the Texaco Food Mart #2 project site. It should be noted that a DOT Right of Way Encroachment
Agreement will need to be obtained for remediation system construction activities.
Corrective Action Plan
Texaco Food Mart #2
Lexington, Davidson County, North Carolina
2.0 CORRECTIVE ACTION PLAN OBJECTIVE
October 17, 2003
Page 7
This CAP has been prepared to present a work plan designed to restore petroleum hydrocarbon
impacted soil and groundwater at the Texaco Food Mart #2 project site to a condition acceptable to
the NCDENR. This CAP was prepared in accordance with 15A NCAC 2L.0l 15 and 15A NCAC
2L.0106 (h).
2.1 Soil Cleanup Target Concentrations
Based on the high risk ranking of this site, the target soil cleanup concentrations are the "soil-to-
groundwater" (MSCC's) as required by 15A NCAC 2L.0l 15. The affected soil is approximately
centered in the vicinity of the existing gasoline dispenser on the western side of the store building.
Based on the information collected during CSA activities, it has been determined that the affected
zone of the soil extends to the saturated zone of the aquifer at some locations. Remediation of the
soil in these saturated zones will be addressed in the groundwater remediation section of this CAP.
2.2 Groundwater Cleanup Target Concentrations
Given the high-risk category for the site, the target cleanup concentrations for groundwater at the
site are the 15A NCAC 2L .0202 (2L) maximum allowable concentrations for Class GA
groundwater.
Corrective Action Plan
Texaco Food Mart #2
Lexington, Davidson County, North Carolina
3.0 EXPOSURE ASSESSMENT
3.1 Summary of Water Supply and Land Use
October I 7, 2003
Page 8
Eleven ( 11) privately owned water supply wells were identified within a 1,500-foot radius of the site
(See Table 4). Through conversations with the property owners and/or returned Water Supply Well
Information letters, three (3) water supply wells were confirmed to be active within 1,500 feet of the
Texaco Food Mart #2 site.
3.2 Utilities
Electric: Power lines are underground and overhead at the project site.
Communications Line: An underground telephone line is present.
Alternative Water Supply: Potable water to the site and surrounding properties is provided by a
municipal water supply system. An underground water line is present on the western side of the
property.
Sewer: An underground sanitary sewer line is present on the west and north side of the building.
The depth of this line is unknown.
Natural Gas: Not identified in the area.
Septic Tank/Leach Field: Sanitary sewer lines were observed to be running on the northern and
western side of the project site. It is not anticipated that any septic system or leach field is located
on the property.
Based on the depth and location of soil samples collected, there is a potential that the soil
contamination intersects the utility lines. Based on the depth to groundwater, the groundwater
contamination does not intersect any of the utility lines.
3.3 Potential Receptors
Water Supply Well Water Quality: No petroleum hydrocarbon constituents have been identified
in nearby water supply wells.
Public Water Intakes: No public water intakes have been identified within a 1,500-foot radius of
the site.
Surface Waters: No surface waters were identified in the vicinity of the site.
Corrective Action Plan
Texaco Food Mart #2
Lexington, Davidson County, North Carolina
4.0 EVALUATION OF REMEDIAL ALTERNATIVES
4.1 Objectives of the Corrective Action Plan:
A. Statement of Goals of the Corrective Action Plan:
October 17, 2003
Page 9
The overall objective of the soil and groundwater CAP at the site is to eliminate the potential
of any present or future threat to human health, safety, or the environment posed by
petroleum-impacted soil and groundwater. It is also the objective of the NCDENR
groundwater policy to restore groundwater quality to a level compliant with 2L Standards,
or as close as is economically and technologically feasible.
The immediate goal of this CAP will be to ensure containment and attenuation of the highest
levels of the contaminant plume. This will be accomplished through an air sparging/soil
vapor extraction system which will provide remediation to the "hot spot" of the plume while
limiting plume migration. A program will be developed to monitor the contaminant
attenuation and modify the treatment system as needed.
B. Target Clean-up Concentrations:
Based on our review of currently available United States Environmental Protection Agency
(US-EPA) literature, our understanding and past experience on North Carolina remediation
projects, and our evaluation of the site specific data, it is our opinion that there is a low
probability of restoring the contaminated groundwater to the 2L Standards in a reasonable
time frame, primarily due to the 2L Standard for benzene (I ppm). This CAP proposes an
innovative approach to providing a more rapid and cost effective clean-up using an air
sparging and soil vapor extraction technology to provide active remediation of the
contamination "hot spot" while limiting migration of the entire contaminant plume. Natural
attenuation processes will also be utilized for further, concurrent, remediation of the plume
and will be enhanced within the active technology area of influence (bioremediation).
C. Target Startup and Completion:
It is anticipated the CAP will take approximately two (2) months to be approved by the
NCDENR. We anticipate installation and activation of the system will take place four (4)
to six (6) months after CAP approval. Based upon our experience with similar remediation
systems, we estimate that it will take three (3) to six (6) years to achieve the maximum
attainable treatment levels. The ultimate target concentration will be the 2L Standards, but
alternate treatment standards may need to be applied for at a future date. System shutdown
will be requested following compliance with the 2L regulations; most likely when
groundwater levels approach asymptotic levels and no concentrations above the 2L Standards
are outside the compliance boundary of the site.
Corrective Action Plan
Texaco Food Mart #2
Lexington, Davidson County, North Carolina
4.2 Evaluation of Remedial Alternatives
4.2.1 Preliminary Feasibility Study:
October I 7, 2003
Page IO
Shield conducted a limited technical and financial feasibility study to determine the most
applicable remedial alternative for the project site. The following is a summary of the site
conditions that were considered during the selection of the most feasible treatment
alternative:
1 . Medium permeability soils, based on well logs and subsurface investigations, are
present in the treatment area. This site condition will allow the use of an active
remediation approach for the impacted soil and groundwater.
2. The analytical data compiled during the air-sparging feasibility test indicated a
medium to small sized area (20-foot radius) can be covered by the affect of each well.
3. The analytical data compiled during the soil vapor extraction feasibility test indicated
a small sized area ( 15-foot radius) can be covered by the affect of each well.
The following sections provide a brief description of each alternative that was considered
during the preparation of the CAP. In addition to the site conditions listed above, economic
feasibility, reliability, and maintenance were also considered.
4.2.2 Containment Pumping Technology:
This treatment technology involves the removal of contaminated groundwater through
recovery wells and subsequent treatment of the water with an activated carbon canister
system, stacked tray aerator, and/or other treatment methods. This technology generally
provides hydraulic control of the plume. The permitted effluent from these systems are
typically discharged into a nearby surface water feature, sanitary sewer system, injection well
system, or infiltration gallery. This is the primary type of system that has been utilized for
containment of contaminant plumes in the majority of impacted groundwater sites to date in
the environmental industry.
Typical containment pumping technology relies heavily on the washing action of the
groundwater through the soil matrix to remove contaminants. Pumping systems usually cost
between $60,000 and $100,000 for the equipment and installation. There are maintenance,
monitoring, reporting, and disposal costs thereafter. Annual maintenance and monitoring
would be approximately $30,000 a year. Based on the size of the contaminant plume and the
levels of contamination, associated costs and aquifer limitations, a pump & treat system is
not considered a good economical alternative for the site.
Corrective Action Plan
Texaco Food Mart #2
Lexington, Davidson County, North Carolina
4.2.3 Excavation and Treatment:
October 17, 2003
Page I I
This alternative would involve the removal of impacted soils generally above the water table
but sometimes below water table. Excavation is not considered productive or economically
feasible at this time due to the location of soil contamination beneath the existing canopy and
active gasoline dispenser. Costs would be based on the quantity of soil and site repair. For
a site of this nature excavation and treatment costs could quickly exceed $100,000.
4.2.4 Air Sparging:
This alternative involves the pressurized injection of a low volume of air below the water
table to volatilize petroleum constituents and encourage insitu bioremediation through the
stimulation of natural microbes in the soil and groundwater. Air sparging is most often used
in conjunction with soil vapor extraction (SVE) wells that allow the removal of volatile
contaminants (fugitive emissions) and a percentage of the semi-volatile contaminants from
the vadose zone of the treatment area. Cost are typically in the range of $40,000 to $50,000
for equipment and installation plus maintenance, monitoring, and reporting. Based on the
number and depth of sparge wells needed for a site, the cost may be higher than typical.
4.2.5 Soil Vapor Extraction:
Soil Vapor Extraction (SVE) induces the removal of volatile contaminants and a percentage
of semi-volatile contaminants from the vadose zone of the treatment area. This technology
is often used in conjunction with air sparging and/or containment pumping systems. This
remedial alternative has been used with success in primarily sandy and silty soils, but it is
considered a potentially feasible alternative for silty and clayey soils if adequate provision
is made to account for low flow rates and the presence of preferential flow channels. Low
permeability soils, such as silty clays, may limit the rate of treatment and require that
recovery wells be spaced at closer intervals. Through application of a vacuum, vapors are
removed from extraction wells screened in the vadose zone. This in tum induces airflow
through the vadose zone to the extraction well, which acts as a sink for contaminant vapors.
This option by itself will clean up the soil within the unsaturated zone and possibly seasonal
fluctuating portion of the capillary fringe, but not the groundwater and therefore would need
to be combined with a groundwater treatment system. Costs for SVE equipment and
installation will be approximately $45,000 to $60,000. There would be maintenance,
monitoring, reporting and in some cases disposal costs associated with this option.
Corrective Action Plan
Texaco Food Mart #2
Lexington, Davidson County, North Carolina
4.2.6 Innovative Technologies:
October 17, 2003
Page 12
Newer innovative technologies such as in-situ vitrification, hydrogen peroxide flushing, oxygen
releasing compounds (ORC), and others were briefly considered but due to potentially excessive
costs and/or the NCDENR innovative approval procedures, which hinder these technologies,
these options were declined.
4.2. 7 Natural Attenuation:
Due to the "High" risk ranking of the Texaco Food Mart #2 project site, natural attenuation is
not an initial stand-alone option for corrective action at the site. Natural attenuation can be used
concurrently with active remediation to address strategic portions of the plume or as an
euhanced by product of the active remedial system. It would be considered as a stand-alone
technology once active remediation is determined to be impractical. The ten-year cost for
natural attenuation at this site is estimated at $105,000 using current Trust Fund costs.
4.2.8 Possibility of Connecting Adjacent Property Owners to Municipal Water:
Municipal water is available to the subject property and surrounding properties. There are three
(3) confirmed active water supply wells within 1,500 feet of the source area. Eight (8)
additional wells that are not in use were identified within 1,500 feet of the source area. Shield
negotiated with the well owners within 1,000-feet of the release to learn if they would connect
to municipal water. One owner totally refused to connect to municipal water and will continue
to use his well.
4.3 Feasibility Studies and Basis of Design:
In order to determine the most appropriate remedial technologies for the site, air sparging and soil
vapor extraction feasibility tests were conducted at the site.
4.3.1 Air Sparging (AS)/Soil Vapor Extraction (SVE) Feasibility and Evaluation
Testing:
In order to conduct soil vapor extraction/air sparging feasibility studies, remedial wells VE-!
and AS-I and temporary wells TW-2, TW-3, and TW-4 were installed on March 13, 2003 in
order to accurately evaluate these remedial technologies at the site. Air Sparging feasibility
testing was conducted on March I 8, 2003, Soil Vapor Extraction feasibility testing was
conducted on March 19, 2003, and a combination Air Sparging/Soil Vapor Extraction
feasibility test was conducted on March 20, 2003. The analysis of the data from these tests
aided in the development of the quantity of soil vapor extraction (SVE) and air sparging (AS)
wells needed for the remedial system design. The SVE was determined to have a radius of
fifteen (15) feet. The air sparging was determined to have a radius of influence of twenty (20)
feet. The radius of influence was determined by measuring the distance from the respective
feasibility test well to the outermost observation well which displayed influence in either
differential pressure, depth to water, dissolved oxygen readings, volatile organic vapors,
Corrective Action Plan
Texaco Food Mart #2
Lexington, Davidson County, North Carolina
October 17, 2003
Page 13
oxygen content, or carbon dioxide content. These parameters were measured during various
phases of the tests and the data tabulated to check influences. The flow rates were measured
at the point of injection and extraction. Differential pressure, groundwater depths, volatile
organic vapors, dissolved oxygen content, oxygen, and carbon dioxide measurements were also
taken from other surrounding test wells. Each case study was run until stabilization occurred
in the surrounding test wells. A conservative radius of influence was then ultimately
determined for each remedial alternative. The following conclusions were developed for each
case study with field data presented in Appendix C:
Case Study I: Utilizing Test Well AS-I for Air Sparging
The air sparging (AS) test was run for a duration of360 minutes at a varying positive
pressure. Pressure and flow were maintained as follows:
30 psi, 30 cfh -
35 psi, 60 cfh -
40 psi, 90 cfh -
1.0 hour
1.5 hours
3.5 hours
All differential pressure readings, groundwater depths, dissolved oxygen, oxygen, carbon
dioxide, and volatile organic vapor readings can be found in the field test data (Appendix
B). The test indicated a strong influence on wells MW-2, TW-2, and TW-3. Moderate
influences were seen on VE-I, TW-4 and MW-I. The parameters most strongly
influenced were depth to water, differential pressure, oxygen content and carbon dioxide
content. Dissolved oxygen content did not show significant influence, most likely due
to the short duration of the study.
Case Study 2: Utilizing Test Well VE-I for Soil Vapor Extraction
The vapor extraction (VE) test was run for a duration of 360 minutes at a varying
vacuum pressure. Vacuum pressure was maintained as follows:
35 inches ofH20 for 2.0 hours
45 inches ofH20 for 2.0 hours
55 inches ofH20 for 2.0 hours
Vacuum pressure, stack discharge velocity, ambient air inlet velocity, well head air
velocity depth-to-water, differential pressure, and stack FID readings were collected at
30 minute intervals during the study. Results indicated a moderate influence on wells
AS-I, MW-2, and TW-3. No significant influence was observed in the other wells
monitored. A direct correlation was observed between the SVE blower vacuum pressure
and the discharge stack FID readings and the well head flow.
Case Study 3: Utilizing Test Well AS-I for Air Sparging and VE-I for Vapor Extraction
The Combination ASNE test was run for a duration of 360 minutes. Air Sparging was
conducted at a varying positive pressure and flow rate. Sparge pressure was varied
between 25 and 40 psi. Sparge flow rates varied from 30 to 144 cfh. SVE vacuum
pressures ranged from 25 to 40 inches of water column vacuum.
Corrective Action Plan
Texaco Food Mart #2
Lexington, Davidson County, North Carolina
October I 7, 2003
Page 14
All differential pressure readings, groundwater depths, dissolved oxygen, oxygen, carbon
dioxide, and volatile organic vapor readings can be found in the field test data (Appendix
B). The test indicated a strong influence on wells MW-2, TW-2, and TW-3. A moderate
influence was observed on MW-!, MW-3, and TW-4.
A direct correlation was observed between the SVE blower vacuum pressure and the
discharge stack FID readings and the well head flow
Corrective Action Plan
Texaco Food Mart #2
Lexington, Davidson County, North Carolina
5.0 PROPOSED CORRECTIVE ACTION PLAN
October 17, 2003
Page 15
Based on the remedial technologies feasibility studies and evaluation discussed above, a Soil Vapor
Extraction/ Air Sparging remediation system is proposed to allow a cost-effective site cleanup. A
preliminary cost estimate for the proposed system is provided in Appendix D. System basis of
design information is presented in Appendix E and summarized below.
5.1 SVE System Design
A SVE system will be employed to capture vapors from both the affected unsaturated zone soils and
vapors generated from the air sparging wells located in the area of highest groundwater contaminant
concentrations. PVC piping will carry contaminant vapors through trenching to the treatment
compound. The major equipment components for the SVE unit include an air/water separator,
ambient air inlet valve, discharge silencer, particulate air filter, vacuum relief valve, vacuum blower.
The vapor flow rate of the SVE vacuum blower will be kept higher than the air sparging flow rates
at all times. This will ensure capture of sparged vapors (fugitive emissions).
5.1.l SVE Wells
A total of seven (7) SVE wells ( 6 proposed, 1 existing) are proposed to recover vapors in the area
of highest soil contamination. The existing recovery well VE-1 will be utilized as one of the SVE
wells along with the installation of a new well. A schematic of a typical SVE well is presented as
Figure 17.
SVE wells will be constructed of 4-inch diameter Schedule 40 PVC installed to a depth of
approximately 20 feet. The wells will be screened over a depth interval of 5 to 20 feet below the
ground surface with 0.02-inch slot PVC screen. A bentonite seal will be placed immediately above
the screened interval to prevent short-circuiting of the air pathway. A flow control valve and gauge
will also be included at the well head for each well. Six (6) inch diameter PVC piping will carry
contaminant vapors back to the SVE system at the treatment compound.
5.1.2 Equipment Components
The following equipment has been incorporated in the design of the SVE treatment system. Figure
17 presents the piping and instrument diagram (P&ID) for the remediation system. The system
layout showing the proposed locations of the SVE wells is shown on Figure 18. Engineering cut
sheets for the proposed equipment are presented in Appendix F. The equipment shall be capable of
meeting the performance criteria specified below. Where a manufacturer or model is specified,
equivalent equipment may be substituted, provided the performance meets or exceeds the
specifications and is approved by the Engineer. The SVE system shall be housed in a lockable
weatherproof enclosure (building) to be located as shown on Figure 18. The SVE system should be
constructed within the enclosure and tested prior to delivery to the site. All wiring shall meet
applicable NEC and local electrical codes. All components shall be UL listed.
Corrective Action Plan
Texaco Food Mart #2
Lexington, Davidson County, North Carolina
The following is a list of the primary system components:
October 17, 2003
Page 16
• Seven (7) vacuum gauges capable of reading over a range of O to I 00 inches of water ( one at
each SVE well head).
• Two (2) liquid-filled vacuum gauges (0-30 inches of mercury). One placed before the blower
air filter and moisture separator, and one placed between the blower and air stripper.
• Seven (7) 4-inch isolation ball valves at each SVE well head
• Air filter (10-micron particulate removal at rated flow capacity of blower).
• Moisture separator (flow rated to match blower).
• Explosion proof Vacuum blower rated for a maximum flow of 600 cubic feet per minute (cfm)
and a maximum vacuum of 12.0 inches mercury.
• A vacuum relief valve (flow capacity equal to the blower maximum flow).
• Influent and effluent sampling ports.
• 4-inch and 6-inch Schedule 40 PVC piping necessary to connect each individual SVE well to the
system vacuum inlet. The effluent SVE pipe (discharge stack) must be galvanized steel.
• Air flow meter (0-1,000 cubic feet per minute [cfm]).
• Discharge silencer (muffler).
• Aluminum or Schedule 80 PVC control panel.
The SVE design is intended to provide a maximum of approximately 600 cfm of total vapor recovery
(reference system basis of design in Appendix E). The blower, moisture separator, and air filter
should be sized as necessary to achieve these results.
5.2 Groundwater System Design
5.2.1 Air Sparging Wells
A total of six ( 6) air sparging wells ( 5 proposed, 1 existing) will be utilized in the remediation
system. The location of the air sparging wells is depicted on Figure 18. The wells will be
constructed of2-inch diameter Schedule 40 PVC, flush threaded casing, and a 2.5-foot section of
0.010-inch slot well screen at the base of the well. The total well depths will be approximately 45
feet below ground surface for 5 of the wells with the sparge well closest to T-1 installed to a depth
of 85 feet. The construction specifications of the proposed air sparging wells is shown on Figure 19.
Engineering cut sheet(s) for the proposed installed equipment is presented in Appendix F.
Corrective Action Plan
Texaco Food Mart #2
Lexington, Davidson County, North Carolina
5.2.2 Air Sparging System Components:
The air sparging (AS) system:
October 17, 2003
Page 17
• An air compressor capable of providing I 00 psi regulated pressure at a flow of 35 cfm.
• Main compressor regulator (0 to 200 psi)
• Six (6) pressure regulators (capable of holding 150 psi) with gauges capable of reading up to 50
pounds per square inch gauge (psig) pressure (to be installed on control panel).
• Eight (8) air flow meters:
(1) 0 to I 00 scfm at pressures up to 200 psig
(6) 0 to 300 scfh at pressures up to 200 psig.
• Air filter bank consisting of an oil/water separator, coalescing filter, and activated carbon filter.
• Control panel to control air supply to six ( 6) air sparging wells.
• Air delivery tubing capable of providing 50 scfm and withstanding 200 psi.
• Condensate separator.
• Three-way Solenoid valve to secure air flow.
• Exhaust fan.
• Noise reduction insulation.
NOTE: These components will be located within a separate portion of the system
building from the SVE system.
Corrective Action Plan
Texaco Food Mart #2
Lexington, Davidson County, North Carolina
5.3 Maintenance Plan and Implementation Schedule
October 17, 2003
Page 18
The following is a list of operational maintenance tasks and the anticipated/recommended frequency:
Bi-Weekly Site Maintenance
• Check control panel for lights indicating system failures or equipment down, initiate
repairs as appropriate.
• Check well vaults for problems (i.e. cracking of pad, storm water infiltration, missing bolts).
• Measure the amount of collected condensate in the air/water separator and drain as necessary.
• Check filters for fouling, change when needed.
• Record and set SVE vacuum gauge at the blower area and at each well head/monitoring point.
• Record and set AS flow and pressure to each well.
• Check level and condition of fire extinguisher.
Note: Enter all above information in a dedicated system maintenance log to be kept at Shield's
office.
Implementation Schedule
Targeted schedule dates for CAP implementation: All dates are shown as calendar days after CAP
approval and receipt of any required permits, right to enter agreements and approved NCDENR Task
Authorization Forms (TAFs).
60 120
EVENT DAYS DAYS
S.ubmiftjil~(~pinpi!liil~~l~!~~';r• ..
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~fitein A:cl){/lii~~,.
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*=After receipt of related NCDENR approved TAF
240
DAYS
3 YEARS
ESTIMATED
Corrective Action Plan
Texaco Food Mart #2
Lexington, Davidson County, North Carolina
5.4 System Security and Safety Measures
October 17, 2003
Page 19
The SVE/ Air Sparging treatment compound will be enclosed by a treated wood slat fence to be kept
locked at all times while unattended. The following signs will be posted at the treatment system
location:
• Keep Out
• No Smoking
• Emergency Phone Number
Each electrical control panel(s) will be labeled as to its design function. A fire extinguisher shall be
stored on-site in an area easily accessible at all times. The fire extinguisher shall be dry chemical
Type ABC. The system enclosure will be divided into two areas. One area will house the air
sparging equipment and control panel and the other area will house the soil vapor extraction
equipment (see Figure 17). The dividing wall will be sealed to prevent fugitive vapors from the SVE
area from entering the air sparging area. All electrical motors and wiring in the SVE area will be
rated for hazardous locations/explosion proof.
Corrective Action Plan
Texaco Food Mart #2
Lexington, Davidson County, North Carolina
October I 7, 2003
Page 20
6.0 MONITORING, SYSTEM EVALUATION PLAN AND REPORTING
In order to evaluate the progress of the air sparging, groundwater and/or soil-gas, OVA readings will
be periodically obtained. In addition, groundwater monitoring wells will be sampled and analyzed
for aromatic volatile organics using EPA Method 601/602 extended (to include MTBE, IPE, and
naphthalene), Lead by EPA Method 3030C, EDB by 504.1, and MADPE VPH on a quarterly basis.
Semi-annual groundwater sampling will begin after the fourth quarter. Targeted analytes may be
reduced depending on historical sampling trends. The above groundwater analytical results will be
reported to the NCDENR -WSRO in semi-annual active remediation monitoring reports.
The effectiveness of the SVE system will be monitored by evaluating analytical results for the air
samples collected from the system exhaust stack sample port. Air samples will be collected from
the SVE system at start up, monthly for the first quarter, and semi-annually thereafter. These
samples will be analyzed in accordance with EPA Method 18, or equivalent, for BTEX and total
petroleum hydrocarbons (TPH).
Corrective Action Plan
Texaco Food Mart #2
Lexington, Davidson County, North Carolina
7.1 Public Notification
7.0 PERMITS
October 17, 2003
Page 21
In accordance with !SA NCAC 21 .Ol 15G), letters of notification of the proposed Corrective Action
Plan (CAP) will be mailed to Diane Crouse, Davidson County Health Director and Mr. Robert Hyatt
Davidson County Manager, concurrent with the submittal of the Corrective Action Plan. Also, the
required public notice will be issued in a proper medium to notify all property owners and occupants
within or contiguous to the area where the contamination is expected to migrate. Copies of these
letters and notice are contained in Appendix G.
7.2 DOT Encroachment
It is anticipated that a Department of Transportation Right of Way Encroachment Agreement will
be necessary to complete the installation of the remedial action system.
Corrective Action Plan
Texaco Food Mart #2
Lexington, Davidson County, North Carolina
8.0 LIMITATIONS
October 17, 2003
Page 22
Shield has performed environmental services at the subject site on behalf of Techno, LLC for
Holding Brothers, Inc. (Techno, LLC) Shield has performed this scope of work as an independent
contractor/consultant using reasonable care and skill in accordance and consistent with customary
industry standards of engineering, geology, and hydrogeology practices. This standard of care is the
sole and exclusive standard of care that can be applied to measure Shield's performance of the work.
No other warranty, expressed or implied is made or intended by Shield.
The report has been prepared for the exclusive use by Techno, LLC for Holding Brothers, Inc. All
recommendations, findings, and conclusions, made by Shield have been made to the best of Shield's
knowledge, opinion and belief, based upon information obtained during this scope of work, and is
limited by the scope nature and type of services as agreed upon between Techno, LLC and Shield.
Conclusions are provided with the understanding that Shield is presenting information and not
rendering legal advice. If such advice is needed, legal counsel should be consulted. It is the
responsibility ofTechno, LLC under advice of its counsel to notify the appropriate federal, state, or
local public agencies as required by law; or otherwise to disclose in a timely manner, any
information that may be necessary to prevent damage to human health, safety, or the environment.
Compliance with recommendations provided as part of this report in no way assures compliance with
federal, state and/or local laws, regulations, and/or requirements. Analytical data has been obtained
from Prism Laboratories, Inc. This information, to the extent that it was relied on to generate this
report, is assumed to be correct and complete. The work performed in conjunction with this report
and the data developed are intended as a description of available infonnation at the dates and specific
locations given. Shield is not responsible for inspecting, examining, or reporting findings or
recommendations with respect to any conditions that were knowingly or unknowingly withheld,
concealed, hidden, or in any way not disclosed or observable at the time of this scope of work.
Corrective Action Plan
Texaco Food Mart #2
Lexington, Davidson County, North Carolina
9.0 REFERENCES
October 17, 2003
Page 23
Angel, Keith G., P.E., In-Situ Remedial Methods: Biosparging, The National Environmental
Journal, January/February 1992.
Driscoll, Fletcher G., Ph.D., Groundwater and Wells, Johnson Filtration Systems Inc., 1989.
Johnson, P.C. et. al., A Practical Approach to the Design, Operation and Monitoring ofln-Situ
Soil Venting Systems, Groundwater Monitoring Review, Spring 1990.
Johnson R.L. et. al., An Overview ofln-Situ Biosparging; Groundwater Monitoring Review, Fall
1993.
Kerr, Robert, S., In-Situ Bioremediation of Ground Water and Geological Material, U.S. EPA,
Environmental Research Laboratory, July 1993.
Montgomery, John H. and Welkom, Linda M., Groundwater Chemicals Desk Reference, 1990,
Lewis Publishers, Inc.
Nyer, Evan K. and Suthersan, Suthan S., Air Sparging: Savior of Groundwater Remediations or
Just Blowing Bubbles in the Bathtub?, Groundwater Monitoring Review, Fall 1993.
U.S. EPA Office of Research and Development, EPA Engineering Bulletins: Current Treatment
and Site Remediation Technologies, 1993.
U.S. EPA Solid Waste and Emergency Response (OS-l!W), EPA 542-R-93-001, Vendor
Information System for Innovative Treatment Technologies (VISITT), v.2.0; April 1993.
USGS, Washington, DC, Scale 1:24,000, Kings Mountain, NC, and Grover NC, NC 7.5 Minute
Topographic Quadrangles.
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; + INACTIVE WATER SUPPLY WELL 5 AVONDALE RD 1,500' RADIUS MAP
§ ♦ ACTIVE WATER SUPPLY WELL
ENGJNEERJNG, /NC. www.,hieldonglneeri09.o0n1
6 0 CD I TEXACO FOOD MART #2 ~ 1700 COTTON GROVE ROAD .t
15
00' RADIUS-----APPROXIMATE GRAPHIC SCALE LEXINGTON, NORTH CAROLINA II! O 150 225 ]OO SHIELD# 1001289 J NOTE: ALL LOCATIONS ARE APPROXIMATE. DATE: 10/07/03 DRAWN BY: DE
1-1.1 SCALE: 1 in. = 300 ft.
'"-------------------------------------------------------~SC~A~LE::..:....: ...:.AS~SH!O!!W!!N:!.....~Fl~G!;!,UR~E;..;:~-!;,,2 _ _J
~
!!i
8
I
LEGEND:
N
LIGHTPOLf
POWER POLE
ELECTRICAL LINE
SANITARY SEWER LINE
-• --PRODUCT LINE
@ TEXACO FOOD MART MONITORING WELL
() TEXACO FOOD MART DEEP MONITORING WELL
AMOCO RUSHCO 113 MONITORING WELL
ASPHALT
,,_
ALL DATA TAKEN FROM lHE PHASE II LIMITED SITE ASSESSMENT
Hi~H~~flfo~~ED BY CBM ENVIRCWENTALSERVICES, INC.
MW-4111
WENDY'S PROPERTY
VACANT LOT
ACCESS ROAD
@MW-5
I
I
MW-6111 I
PARKING AREA
I
I
. __,,
I
I
I
I
I
I
l
l
I
I
'
I
'" ~ ..,
z ~ 0 !,!,
i'1
'" t,
11 u z
D DISPENSER
□DISPENSER
0 TEMP-2
CEDAR LANE ROAD
DISPENSER□
DISPENSER□
"' MW-1
□DISPENSER
,---------' : GASOLINE UST I
o l--------I
,: ,--------I Ii : GASOLINE UST : ul---------e§,---------
u : GASOLINE UST /
l-------I
0 TEMP-1
I ----------I
: DIESEL UST : l-----------l
CONCRITE PAD
AMOCO RUSHCO#l
0 MW-2
.
.S!llR~fD
SITE MAP
4301 TAGGART CREEK ROAD
CHARLOTTE, NC 28208
704-3!M-ll913
704-394-69811"""
w,,,,.1hloldenglnaeri'lg.<0m
8 j TEXACO FOOD MART #2
'iii 1700 COTTON GROVE ROAD
VAPOR EXTRACTION WELL
AIR SPARGING WELL
-E LEXJNGTON1 !"ORTH CAROLINA al APPROXIMATE GRAPHIC SCALE SH/Ew # 1001289
:~
0 15 30 DATE ·. 10/07/03 DRAWN BY : -= NOTE: ALL LOCATIONS ARE APPROXIMATE. DE '"--------------------------------------------------------'~CA~LE:,:, 1,:;";,:··.:30:''·~-12sc~A~L~E~::.....t.A~S]S~H~O~W~N[:]JF~IG~U~R~E[:: ==3r:=::i
j
~ 8
J
§
l
8
N
VACANT LOT
r--------, I REGULAR I
I UST I L ________ .J w r--------, I RfG~I..AR I PIT1 u I L--------.J
w w
MW-4 w A
ASPHALT w
w
w
Iii--·-·-------·-·-·-·---·-----------·-·-·-·-·-OVERHEAD ELECTRIC
LEGEND:
(I-l!GHT POLE
/3 POWER POLE
-·-·---ELECTRICAL LINE
-------SANITARYSEWERUNE
--• --PRODUCT LINE
TEXACO FOOD MART MONITORING WELL
TEXACO FOOO MART DEEP MONrroR!NG WELL
AMOCO RUSHCO #3 MONITORING WELL ALL DATA TAKEN FROM THE PHASE II LIMITED SITE ASSESSMENT REPORT PREPAREO BY CBM ENVIROMENTALSERVICES, INC. DATED 4/16/01.
VAPOR EXTRACTION WELL
AIR SPARGING WELL
CROSS SECTION LINE
ACCESS ROAD
WENDY'S PROPERTY
B'
B
MW-6
PARKING AREA
□ DISPENSER DISPENSER□ ) □DISPENSER
DD!SPENSER DJSPfNSfR□ .~ □DISPENSER
0 cl "' '" .• ~ 1--------I <!l : GASOLINE UST : z 0 l=>l---------I= 1W·10 '£ ,--------I
§_ ~ i GASOLINEUST _ :
A' 6 ,--------I
'-' : GASOLINE UST I
TEMP-2 MW-1 1--------I
.,
z
CEDAR LANE ROAD 0 TEMP-1
I ----------I
: DIESEL UST : l-----------J
CONCR
"' ,,
" .
"
" AMOCO
RUSHC0#3
~
"'
0MW•2
• SHIF.'LD 4301TAGGARTCREEKROAD
CHARLOTTE, NC 28208
704-39«i9!3
704-394-6969 fa,; ENGINEERING, /NC. www.•hllfll<kir,glneer1ng.oom
SOIL SAMPLE LOCATION MAP
TEXACO FOOD MART #2 I -=• -• ., -APPROXIMATE EXTENT Of SOIL COITTM\INATION APPROXIMATE GRAPHIC SCALE ·c ♦ GEOPROBELOCATION O
15 30 3 ~ DATE: 10/07/0 ! NOTE: ALL LOCATIONS ARE APPROXIMATE. SCALE: 1 in . ., JO ft. SCALE : AS SHOWN
1700 COTTON GROVE ROAD LEXINGTON, !lORTH CAROLINA SH/Fw fl. 1001289
DRAWN BY: DE
rL, ________________________________________________________________ _._ ________ _,_ ________ _ FIGURE: 4
~
i!l 8
I ~
§
i
LEGEND:
N
LIGHT POLE
POWER POLE
ELECTRICAL LINE
----~--SANITARVSEWERLINE
-• -PRODUCT LINE
@
0
0
TEXACO FOOD MART MONITORING WELL
TEXACO FOOD MART DEEP MONITORING WEU.
AMOCO RUSHCO 113 MONITORING WELL ALL DATA TAKEN FROM THE PHASE II LIMITED SITT ASSESSMENT gx~a~~fUo~~EO BY CBM ENVIROMEHTALSERVICES, INC.
VAPOR EXTRACTION WELL
AIR SPARGING WEU.
FEET
---GROUNDWATER ELEVATION CONTOUR LINE {ft)
4--GENERALIZED GROUNDWATER FLOW DIRECTION
(77.49) GROUNDWATER ELEVAllON {ft)
Q ~
"' > la! <> z 0 I=
I 0 !,!,
11
"' f-::,
la! u z
WENDY'S PROPERlY
PARKING AREA
□ DISPENSER
□DISPENSER
0 TEMP-2
CEDAR LANE ROAD
DISPENSER□
DISPENSER□
0 MW-1
. . . . . . . .
□DISPENSER
□DISPENSER
1--------I
t GASOLINE UST I I ~ ~--------I ~ l GASOLINE UST I i :======== :
: GASOLINE UST I L ________ l
0 TEMP-1
I ----------I
: DIESEL UST :
l-----------J
CONCRET£ PAD
AMOCO RUSHCO#J
0MW-2
• SHIELD 4301TAGGARTCREEKRDAD
CHARLOTlE, NC 28208
704-394-6!113
7~S4-&96!1fml ENGINEER/NG, /NC, www.&hleldongln"'1ng.oom
GROUNDWATER ELEVATION
CONTOUR MAP
TEXACO FOOD MART #2
1700 COTTON GROVE ROAD LEXING1~~f~J,~2~ROLINA
:I NOTES, 1· DEPTHSTDGRDUNDWATERMEASURED04/22/02. 0 15 l' DATE : 10/07 /03 DRAWN BY: DE
-2-ALLLDCATIDNS ARE APPRDX"-'TE. SCALE, 1 ,, •• 30ft. SCALE : AS SHOWN FIGURE : 5
APPROXIMATE GRAPHIC SCALE
,..,_ ____________________________________________ , __________________________ __.._ ___ _;.;.;..;;..,;..,;..,_a..;..;.;.;.;,;;;_ __ ...; __ __.
110
100
90
80
70
60
50
40
JO
20
10
~ ..
0 -< ,,
"' e LEGEND:
~
~ .;, • ASPHALT / CONCRETE ~ ~
mJ a, SILTY CLAY .: 0: "" ~ ~ CLAYEY SILT N 0 0
§ m SILT 0 N ... " !II ·c
GRASS ANO TOPSOIL • • " ·g,
"' ""
A ; ,. ;s; a,
GW ELEV,
, J.,;L-,:-7.;.;7.4~ _
El SCREENED INTERVAL
-~-GROUNDWATER ELEVATION
0.0056 DATA EXCEEDS MSCC
mg/kg MILLIGRAMS PER KILOGRAM
ppm PARTS PER MILLION
MW-2
Benzere 13000
Toluene 38000
Ethyjbenmre 3600
){~enes 16000
Nap11halere NA
1,2-0icHoroefhare 1200
8-30
Ethytbenzene
Toluene
Total Xylenes
15' · 17'
19.0
15.0
120,0
0 M a,
SAMPLES COLLECTED ON 04/26/02. NOTES; 1-TEXACO FOOD MART SOIL W-COLl£CTE007l31/01,
2· GROUNDWATER SAMPLES IN MW-l \~_4 za T-l COUECTEO ON 10/10/01.
3. GROUNDWATER SAMPLES IN MW•:•a MW 6 COLLECTED ON 04/09/0l,
4· GROUNDWATER SAMPLES IN MW-• KEN FROM THE
s-AMOCO RUSHC?D"s~fJ>~Ls~~/JfJ/:ltoi PREPARED BY t~t5fJi~~~MENTAL SERVICE, INC .
6_ ALL LOCATIONS ARE APPROXIMATE •
EDB 720
Lead BDL
VPH CS-CB 81000
VPH C9-C12 28000
VPH C9-C10 9'00
EPH CB ,..18 "A
EPH C19-C36 NA
EPH C11-C22 NA
GW ELEV. 78.11'
T-1
Ben:mne 390 Temp-2
Toluene 7,8 Benzere 1010
EtlTyiberrzene 9,4 Tolt.ene BDL
K~enes 140 Elhytbenzere BDL
Naphtl'lllene 24 Xlflenss BDL
1 ,2-DicHoroethsne 44 MTBE 1360
EDB 2,8 IPE BDL
Lead BOL EDB BDL
WH C5-CB 850 Lead □.05
· -H C9-C12 270 1 2-0icht□roethare 32.5
· -H C9-C10 25°
EPH C9.C18 BDL
EPH C19-C36 BDL
EPH C11-C22 BDL
\
20
~ ~
10 ~
0 HORIZONTAL SCALE
0 10
SCALE IN FEET
20
MW-1
Benzere 1□2
Toluene BDL
Eltry!benrere BDL
X',!enes 2.2
MTBE 768
IPE BDL
EDB BDL
Lead BDL
1 2-Didioroethare 3.3
A'
SUBSURFACE PROFILE A -A'
DATE:
SCALE:
TEXACO FOOD MART #2
1700 COTTON GROVE ROAD
LEXINGTON, NORTH CAROLINA
SH/fLD # 1001189
10/07/03
AS SHOWN
DRAWN BY
FIGURE:
DE
6
MW-3 MW-2
13000 Benzene Benzene 120 Toluene 38000 4300 3600 Toluene Ethylbenzene Ethylbenzene 1800 X'yienes 160D0 Xyleres 8600 Naphthalene NA NepHhi!ilere 380 1 ,2-Dic:htoroethcme 1200 1 ,2.0 ich!aroethane BOL EDB 720 9.5 Le1:1d BDL EDB
BDL \/PH C5-C8 81000 Lead
VPH CS-CB BDL VPH C9-C12 28000 VPH C9-"12 11000 vPH C9-C10 9100 VPH C9-C10 11000 EPH C9-C18 NA EPH C9-r"'18 990 EPH C19-C3S NA EPH C19-C36 BDL EPH C11-C22 NA B
EPH C11-C22 710
\i .
"' \i M ::::
"' M
"' t "'
.. --------------V, 1/,, ~ ~~ ~ ~ ~ ~ ~ ~ 8;
..
~ ~ GWELEV. ~ ~ ~
c=~ ~ 78.11'J F~ ?: L·" l:'.L
~~
8.40' --------~ r;;:; v,;;
----------
:= 1/ :=~ ~ ;:: 1/, ~~ 0.
s~ :;; l:L
110
100
90
80
7
6 0 -
" \: ,'-,'-o. 5
1,z\ ~> ,·'-~~ '-"-'
0.
,'-
4
,'-,'-,'-30. '~ ,,
,'-'--" :,-_':-. 20.
10
t\
0
LEGEND: GEOLOGIC CROSS SECT ION
■ ASPHALT / CONCRETE § SCREENED INTERVAL
~ SILTY CLAY --!---GROUNDWATER ELEVATION
~ CLAYEY SILT 0.0056 DATA EXCEEDS MSCC
mg/kg MILLIGRAMS PER KILOGRMI NOTES: ~ SILT ppm PARTS PER MILLION
![I GRASS AND TOPSOIL
'
T-1
Bemene 390
Toli..ene 7.B
Ethy!ben:zene 9.4
X'yieres 140
Naphthalene 24
1 ,2-D lcHoroeth:lre 44
EDB 2.B
Lead BDL
'vPH CS-CB B50
VPH C9-C12 270
VPH C9-C10 250
EPH C9-C18 BDL
EPH C19.C36 BDL
EPH C11-C22 BDL
GWELEV.
~78.~----
B -B'
B-32 15' · 17'
Benzene 0.0056
Ethylbenzene 0.084
Toluene 0.190
Total Xylenes 0.510J
\:
11/, ~ ~ ~ t:::2 --------
20
~ ~
10 ~ > "
O +..cHe,OR°'OZe,0,eNT"A'f-l~SC~AL~E~-,
o 10 20
SCALE IN FEET
B'
"' t
..
~ i ~ ~ ~ ½ ------t%c-
F~
i=~ E~
• LD 4301TAGGARTCREEKROAD Sr £IIE cHAALam.Nc '"'" ..cJ.. .J ;~:~:1:::i! r ... '"C www.,hleldenglneering.com ENGINEERING, ln• ,
SUBSURFACE PROFILE B -B'
DATE:
SCALE:
TEXACO FOOD MART #2
1700 COTTON GROVE ROAD
LEXINGTON, NORTH CAROLINA
SHIELD /11001289
10/07/03
AS SHOWN
DRAWN BY:
FIGURE:
DE
7
~
i!i 8 ~ l ~ I 8
l
N
ASPHALT
MW-411!)
(BDL)
;21
GASOLINE/
DISPENSER~
..........
VACANT LOT
r-REGuLAR ___ 1
I UST I L ________ J r--------, I "'/ilf"' I P[TL ________ J
I SUJAEME 7 L---------.J
TEXACO FOOD MART
,,_ __ -----·-----------·-·-·-·-·-·-·-----·-·ovE~HEAD Ei.EcrRic
LEGEND:
LIGHT POLE
POWER POLE
-·-·-·-ELECTRICALLINE
-------SANITARYSEWERLINE
-----PRODUCT LINE
Iii)
0
0
♦VE
♦ AS
{ug/L)
(12,000)
[1n
TEXACO FOOD MART MONITORING WELl
TEXACO FOOD MART DEEP MONITORING WELL
AMOCO RUSHCO Ill MONITORING WELl ALL DATA TAKEN FROM THE PHASE II LIMITED SITE ASSESSMENT
Bl!i¥ITTSrffo~~ED BY CBM ENVJR~ENTALSERVICES, INC.
VAPOR EXTRACTION WEU
AIR SPARGING WEU
MICROGRAMS PER LITER
BENZENE CONCENTRATION (U&IL)
BENZENE CONCENTRATION NOT USED IN CONTOURING (ug/L)
---BENZENE ISOCONCENTRATION LINE (ug/L)
ACCESS ROAD
WENDY'S PROPERTY
MW-5
Iii) BDL)
MW-611!)
(BDL)
PARKING AREA
□ DISPENSER
□DISPENSER
0 TEMP-2
(1,010)
CEDAR LANE ROAD
DISPENSER □
DISPENSER□
TW-1 0 (BDL)
0 MW-1
(1D2)
r--------t
: GASOLINE UST I I ~ ~--------I
~ : GASOLINE UST I (:5 , ________ I
25 1--------I
u : GASOLINE UST I
L--------I
0 TEMP-1
(BDL)
t ----------I
: DIESEL UST : 1-----------J
ONCR PAO
AMOCO RUSHCO#l
• S1L1E.'LD 43-01TAGGARTCREEKSOAD
CHARLOTTE, NC 28208
104-394-e913
7G4-3!l4-1!96111111C ENGINEER/NG, INC, w,,,.-..hleld~nglneer1ng.CIIIII
BENZENE
ISOCONCENTRATION MAP
TEXACO FOOD MART #2
•wi NOTES, 1· GROUNOWATERSAMPLESCOLLECTEOONOl/30/03. O
15
3D DATE; 10/07/03 DRAWN BY; DE
,. ALLLOCATIONSAREAPPROJ<JMATE. SCALE, 1 '"· dOft. SCALE : AS SHOWN FIGURE : 8
BDL BELOW LABORATORY METHOD DETECTION LIMITS APPROXIMATE GRAPHIC SCALE
1700 COTTON GROVE ROAD
LEXINGTON, NORTH CAROLINA SHIELD# 1001289
"''---------------------------------------------------------------------------------------,._ ___________ _., ___________ _.
r N
LEGEND:
¢-LIGHT POLE
J2f POWER POLE
------ELECTRICALLINE
SANITARY SEWER LINE
-• --PRODUCT LINE ~
~ tr
ASPHALT
,_
MW-4@
(BDL)
WENDY'S PROPERTY
VACANT LOT
ACCESS ROAD
MW-5
@ (BDL)
MW-6@ I (BDL)
--,,
I
I
I
I i 0 "' I "'
I
~ CJ z ~
I 0 ~
[
11
"' 5 0 "' u l z
I
I
□ DISPENSER
□DISPENSER
0 TEMP-2
(BDL)
CEDAR LANE ROAD
DISPENSER □
DISPENSER□
TW-1 0 (BDL)
"' MW-1
(BDL)
□DISPENSER
□DISPENSER
I --I
: GASOLINE UST I
cl--------I
£ I --I ~ : GASOLINE UST [ ul---------~,---------o I I I GASOLINE UST I 1--------I
0 TEMP-1
(BDL)
I --------I
l DIESEL UST : l-----------'
"'' '
' '
'
AMOCO RUSHCO#J
0 MW-2
(BDL)
'
'
'
~ @i) TEXACO FOOD MART MONITORING WEU. • I O TEXACOFOODMARTDEEPMONITOR!NGWEU. PARKINGAREI, S' CJ"I"D TD 6,~~~~G'TTE':A;Jcc~:~aRoAo ~ AMOCO RUSHCO #l MONITORING WELL IJ.. _j ..l:J .L. ......,......, ~
i "' :h~8t-TUti~EriMc"WllN~,i~ll,[EfJWc~,srENT 7
04-394-6!l6Bfmc ii: DATE04/16/D1. ' · ENG/NEERING, INC. www.1hJeldanglnH11r,g.a,m
N
~ "'VE VAPOREXTRACTIONWELL TOLUENE
.... • AS AIR SPARGING WELL
8 '"''" MICROGRAMSPERLITER ISOCONCENTRATION MAP
..-(29,000) TOLUENE CONCENTRATION (ug/L)
; 12.,1 TOLUENECONCENTRATIONNOTUSEDINCONTOURING{"IIIL) TEXACO FOOD MART #2
----TOLUENE ISOCONCENTRATlON LINE (ug/L) 1700 COTTON GROVE ROAD
.[ BDL BELOW lABORATORY METHOD omcnoN LIMITS LEXINGTON! ~ORTH CAROLINA iv APPROXIMATE GRAPHIC SCALE SH!Ew # 1001289 :I NOTES, 1· GROUNDWATERSAMPLESCOLLECTEDONIJ</J0/03.
0 15 30 DATE: 10/07/03 DRAWN BY·. DE
_ 2· ALL LOCATIONS ARE APPROX!MATE. ± ._ _________________________________________________________ _;':'.;CA~LE:_:, '!'';.:· ·,:'."'.:";_· _ _J_;S~C~A~L:!;E~:-~A2_S_2S:!jH~O~W~N:!.,_lJF~l~G:_!:U!_!:R~E~: __ _:9~ _ _j
N
ASPHALT
MW-4@
(BDL)
VACANT LOT
i),1)-______________ -----...........................
---------·u
!i!I-·------·----·-·-----·-----------------·-·ovERHEAD ELECTRIC
~
~ 8
J
LEGEND:
(l-LIGliT POL.f
/lf POWER POLE
----· -ELECTRICAL LINE
SANITARY SEWER LINE
-• --PRODUCT LINE
TEXACO FOOD MART MONITORING WELL
TEXACO FOOD MART DEEP MONITTJRING WELL
AMOCO RUSHCO #3 MONITORING WELL
N
~ • VE VAPOR EXraACTION WELL
_ • AS AIR SPARGING WELL g (ug/L) MICROGRAMS PER LITER
ALL DATA TAKEN FROM THE PHASE II LIMITTO SITT ASSESSMENT
~i~~~rrirti~EO BY CBM ENVIROMENTAL SERVICES, INC.
.-(2,800) ETHYLBENZENE CONCENTRATION (ug/L)
ACCESS ROAD
WENDY'S PROPERTY
MW-5 @(BDL)
MW-6@
(BDL)
PARKING AREA
Q cl "' w > fi1 " " .o
I 5 !,!,
~ •• "' "" ::, 0 "' u z
□ D!SPENSER
□DJSPEt.SER
0 TEMP-2
(BDL)
CEDAR LANE ROAD
DISPENSER □
DISPENSER□
0 MW-1
(BDL)
2 □DISPENSER
.~ □DISPENSER
' -I : GASOLINE UST I
o 1--------I fr--------I
!;:; J GASOLINE UST I 5 , ________ I
51---------u I I I GASOLINE UST I
L--------I
0 TEMP-1
(BDL)
I [BDL] ETHYLBENZENE CONCENTRATION NOT USED IN CONTOURING (ug/L) =• ---ETliYLBENZENE ISOC0NCENTRATI0N UN£ (ug/L)
-~ BDL BELOW LABORATORY METHOD omcnoN LIMITS APPROXIMATE GRAPHIC SCALE
AMOCO RUSHCO #3
0MW-2
(BDL)
"
ETHYLBENZENE
ISOCONCENTRATION MAP
TEXACO FOOD MART #2
1700 COTTON GROVE ROAD
LEXJNG1~~11f~J;~2gR□L1NA
W
·i NOTES, 1-o,ou,owmRSAMPLESCoLLEmoo,0413010,. 0 15 1° DATE ; 10/07 /03 DRAWN BY•. DE 2-ALL LOCATIONS ARE APPROXIMATI;.
;;._ _________________________________________________________ _;'::;:CA::;:":.,:' '_::'":.:··~30:_::•'~-+'-J...:S~C;!_A~L:!;E..;:_;A~S~S!jH~O!::'.W~N~J_F~l!fG:_!:U!_!:R~E~:---1~0~-J
~
LEGEND:
N
LIGHT POLE
POWER POLE
ELECTRICAL LINE
-------SANITARY SEWfR LINE
-• --PRODUCT LINE ~ @ TEXACO FOOD MART MONITORING WEll
8 () TEXACO FOOD MART DEEP MONITORING WElL
ASPHALT
...
~ AMOCO RUSH CO #3 MONITORING WEll ~ 0 *~~8gilti.l<ffE~RiWctN'Ni1:ME~,[E£iWctr~~EITT DATED 4/16/01. ' •
MW-4@
(BDL)
VACANT LOT
r--------, J REGULAR I
I UST I L ________ .J r--------, I REGULAR I PITI UST t L ________ .J
f" sus.ri-EME 7 L,. _________ ...J
TEXACO FOOD MART
ACCESS ROAD
WENDY'S PROPERTY
MW-5
@ (BDL)
I
I
MW-6@ I (BDL)
PARKING AREA
I
I □ DISPENSER
□DISPENSER
0 TEMP-2
(BDL)
CEDAR LANE ROAD
[IJSPENSER□
"' MW-1
(2.2)
□DISPENSER
□DISPENSER
' ' : GASOLINE UST t
c, 1--------I if I I ~ : GASOLINE UST I 5 , ________ 1
3r---------v, ' I GASOLINE UST I
'--------I
0 TEMP-1
(BDL)
I ---------I
: DIESEL UST : 1-----------l
CONCRETE PAD
AMOCO RUSHC0#3
0 MW-2 (BDL)
• SUIE~D 4'01TAGGARTCREEKROAD
CHARLOTTE, NC 28208
704-394-6913
704.394-6968 In ENG/NEER/NG, fNC. www.,hle!denglntel1og.com
§ • VE VAPOREXTRACTIONWElL TOTAL XYLEN
I> • AS A<RSPARGINGWEU. ES
; '"'"' MICROGRAMSPERUT£R ISOCONCENTRATION MAP
• (16,700) TOTAL XYLENES CONCENTRATION (ug/L) ~ [14.7) TOTALXYLENESCONCENTRATIONNOTUSEDINCONTOURING(ug/LJ TEXACO FOOD MART #2
.i ---TOTAL XYLENESISOCONCENTRAT<ON LINEl"i/LJ 1700 COTTON GROVE ROAD
... BDL BELOW LABORATORY METHOD omcnoN LIMITS LEXINGTON, NORTH CAROLINA 11 APPROXIMATE GRAPHIC SCALE SHIELD 111001289 :I NOITS, 1· GROUNDWAITRSAMPLESCOLLECTEDOND4/JO/OJ.
0 15 30 DATE ·. 10/07/03 DRAWN BY ·. DE
_ 2· ALL LOCATIONS ARE APPROXIMATI;. '"-------------------------------------------------------..!'CA::'.LE::.:,·.:•·;.:··!'0~,,.:......_11s.scA~L~E;..;,.= _2.A~s1s:t;H~o~w!!NLl.!F~,G~u~R~E;..;,.= __ r11c=J
~
1l
8 i t
i 8
LEGEND:
N
LIGHT POLE
POWER POLE
ELECTRICAL LINE
SANITARY SEWER LINE
ASPHALT
--• -PRODUCT LINE
@ TEXACO FOOD MART MONITORING WELl
C) TEXACO FOOD MART DEEP MONITORING WEil
AMOCO RUSHCO Ill MONITORING WELL ALL DATA TAKEN FROM THE PHASE II LIMITED SITE ASSESSMENT REPORT PREPARED BV CBM ENVIROMENTAL SERVICES, INC. DATED 4/16/D1.
VAPOR EXTRACTION WELL
A1R SPAR GING Wfil
MW-4@
(SOL)
♦ VE ...
BTEX
(ug/L)
(60,500)
[34.5]
SUM TOTAL OF BEN ZEME, TOLUENE, ETHVLBENZENE, AND TOTAL XVL£NES
MICROGRAMS PER LITER
TOTAL BTEX CONCENTRATION {ug/L)
TOTAL BTEX CONCEITTRATION NOT USED IN CONTOURING (ug/L)
---TOTAL BTEX ISOCONCENTRATION LINE (ug/L)
WENDY'S PROPE!ITI
VACANT LOT
ACCESS ROAD
MW-5 @(SOL)
MW-6@
(SOL)
PARKING AREA
D DISPENSER
□DISPENSER
♦ TEMP-2
(1,010)
CEDAR LANE ROAD
DISPENSER□
DISPENSER□
0 MW-1
DDJSPENSfR
□DISPENSER
I -------I
: GASOLINE UST I I ~ :--------I ~ : GASOLINE UST :
§ :--------I l GASOLINE UST I
l--------I (104.2) ~----~
0 TEMP-1
(SOL)
.I :: APPROXIMATE GRAPHIC SCALE BDL BELOW lABORATORV METHOD DETECTION
I ----------I
: DIESEL UST t 1-----------l
CONCRETE PAD
AMOCO RUSHCO#J
0MW·2
(SOL)
• S11,IELD '3-01TAGGARTCREEKROAO
CHARLOTT£, NC 2820B
704·394-6913
704·394-6968 fl<,; ENGINEER/NG INC www.1hltlder,glneerfog.com
TOTAL BTEX
ISOCONCENTRATION MAP
TEXACO FOOD MART #2
1700 COTTON GROVE ROAD
LEXING1~~?~~2g.ROLINA
~ 0 " !0 DATE : 10/07 /03 DRAWN BY : DE 'ii-, NOTES: 1· GROUNDWATER SAMPLES COLLECTED ON 04/30/03.
~ .... ___ ,._,_,,_,_'"_r_"_"_,_"_'_"_'"_'.,_"'_· ______________________________________________________________ ,_CA_LE_,_,_,,_._._'°_''-·--·-s-c_A_L_E...;:_.;A.;S;;..;S.,H.;O;;.;W .... N...;.1,,.;F.;l.;G.,U;.R;.;;;E_:...; __ .;1.;2;.. _ __.
~
re
8
l
" i g
i i
LEGEND:
Q l1GHTPOL.E
f6 POWER POI.£
---·-·-ELECTRICALLINE
SANITARY SEWER LINE
--• --PRODUCT LINE
TEXACO FOOD MA.RT MONITORING WELL
TEXACO FOOD MART DEEP MONITORING WELl
AMOCO RUSHCO #l MONITORING WELL
ASPHALT
ALL DATA TAKEN FROM THE PHASE II LIMIT'EO SITT ASSESSMENT
ax~a1:irr1ro~~EO BY CBM ENVJRCl'.IENTAL SERVICES, INC.
VAPOR EXTRACTION WEU
AIR SPARCilNG WELL
MICROGRAMS PER LITER
(1,700) 1,2-DICHLOROETHANE (OCA) CONCENTRATION (ug/L)
MW-4@
(BDL)
[8.1] 1,2-0!CHLOROETHANE (DCA) CONCENTRATION NOT USED IN CONTOURING (ug/L)
---1,2·01CHLOROErnANE (DCAJ ISOCONCENTRATION LINE (us/L)
SOL BELOW LABORATORY METHOD DffiCTION l..lMl15
VACANT LOT
r--------, I REGULAR I I UST I P========~ I REG*lAR I PJTI u I L--------.l
f'" SUJA,EME 7 1,.. _________ ..J
ACCESS ROAD
WENDY'S PROPERTY
ASPHALT
MW-5
@(BDL)
MW-6@
(BDL)
I
I
PARKING AREA
□ DISPENSER
□DISPENSER
0 TEMP-2
(32.5)
CEDAR LANE ROAD
DISPENSER□
DISPENSER□
TW-1 0 (BDL)
0 MW-1
(3.3)
1 □DISPENSER
-~ □DISPENSER
I --I
: GASOLINE UST I ~ :======== : I;; : GASOLINE UST I
:5 1--------1 Sr---------" I I I GASOLINE UST I L ________ I
0 TEMP-1
(BDL)
I --------I
l DIESEL UST l t-----------J
CONCRETE PAO
~-
~
"'
'
AMOCO
RUSHC0#3
0MW·2
(BDL)
•
• SUIE.'LD 431>1TAGGARTCRE"ROAO
CKARLOTTE, NC 28208
704-3!14-6913
704-394-69611far ENGINEERING, /NC. www.ohlaldBfllllONMg.c:orn
1,2-DICHLOROETHANE (DCA)
ISOCONCENTRA TION MAP
TEXACO FOOD MART #2
1700 COTTON GROVE ROAD LEXINGTON, )lORTH CAROLINA SH/Ew # 1001289 .i APPROXIMATE GRAPHIC SC/I.LE
,is' NOTB, 1· GROUNDWAITRSAMPL<SCOLLECTEDON04/30/03,
0 15 JO DATE : 10/07 /03 DRAWN BY : DE
_ 2· ALL LOCATIONS ARE APPROXIMATE. ;;.._ _______________________________________________________ ,~CA~"~' 1_:•0;,::•·!''~"·;__1..:!SS;CA~L~E:...::,_~A~S2S~H~O~W~N~l.!F~IG~U;!!R~E~::,_ __ 1!_;3~_J
~
8
i 8
LEGEND:
◊
JZI
N
LIGHT POLE
POWER POLE
~ tr
ASPHALT
,_
-·-·-·-ELECTRICALLlNE
-------SANITARYSEWERLINE
--• --PRODUCT LINE
TEXACO FOOD MART MONITORING Wfil
TEXACO FOOD MART DEEP MONITORINCi 'NEll
AMOCO RUSHCO #3 MONITORINCi WEll ALL CATA TAKEN FROM lliE PHASE II LIMITED SITE ASSES~ENT
~l~flflfD~~ED BY CBM ENVJROI.\ENTAL SERVICES, INC.
VAPOR EXTRACTION WEll
AIR SPARCilNCi WELL
MICROGRAMS PER LITER
ETHYLENE DIBROMIDE (EDB) CONCENTRATION (ug/L)
MW-4@
(BDL)
0VE
0 AS
(ug/L)
(610)
[BDLJ ETHYLENE DI BROMIDE {EOB) CONCENTRATION NOT USED IN CONTOURINCi (ug/L)
---ETHYLENE DIBROMIDE (EDB) ISOCONCENTRATION LINE (us/L)
SOL BELOW LABORATORY METHOD DETECTION LIMITS
DISPENSER DIESEL
VACANT LOT
r--------, I REGULAR I I UST I L ________ J r--------, I REGULAR I PITI UST I L ________ .J ASPHALT
r-SUPREME -, I UST I L..---------....1
I
I
MW-6@ I (BDL)
I
I
I
I
---DVEMADELECTRIC/---------11>
ACCESS ROAD
WENDY'S PROPERTY
MW-5 @(BDL)
PARKINCi AREA
---,,
I
I
I
I 0 ~
I "'
I
~
CJ z ~
j
;!,
11:
"' 5 0 "' u
i z
I
I
□ DISPENSER
OoisPENSER
0 TEMP-2
(BDL)
CEDAR LANE ROAD
DISPENSER□
DISPENSER□
TW-1 0 (BDL)
0 MW-1
(BDL)
1 □DISPENSER
.~ □DISPENSER
.---]
: GASOLINE UST I
Cl 1--------I if,--------I
ti : GASOLINE UST I
ei L--------I 8 r--------I l GASOLINE UST I 1--------t
0 TEMP-1
(BDL)
,r r
[ DIESEL UST : l ___________ J
CONCR-PAO
' AMOCO
RUSHC0#3
0MW-2
(BDL)
• SUIELD 4301TAGGARTCREEKROAO
CHARLOTTE, NC 28203
704-394-6S13
704-394-6968 flOC ENG/NEER/NG, /NC. www.•hlflldeogineerjng.oom
ETHYLENE DIBROMIDE (EDB)
ISOCONCENTRATION MAP
TEXACO FOOD MART #2
1700 COTTON GROVE ROAD
LEXING1~~f~~2gROLINA
!c: • DATE: 10/07/03 DRAWN BY: DE ·mi NOT£S: 1· GROUNDWATER SAMPLES COLLECTTD ON 04/30/03.
APPROXIMATE GRAPHIC SCALE
0 15 3,0
°" Z-ALLLOCATIONSAR£APPROKIIM1". SCALE,11a,•30ft, SCALE: AS SHOWN FIGURE: 14 ic"---------------------------------------------------------------------------------------·-----~~..;...;...;._..,1,_..;...;...;...;. ______ ....
Table 1
Summary of Historical Analytical Results -Soil Sampling
Texaco Food Mart #2
Date: 5/02
Incident Number 22332
8260 8260 8260 8260 8260 8260 8260 8260 l 8260 I 8260 l 8260 l 8260 l 8260
" 1! " " " " ~ " " " '>, '>,
" " " " ii ,s ,s ii "' E! " " ,s " " " ..0 " B " " " " 'b " ii ~ ..0 e e " " ..0 0 '>, '>, ·c, ·c: g " ~ ::, e " 0. 11 0. " I-1! I-1! "' ..0 " " g " ~ 0 '>, e e " . " . " " ii ~ • M :9 0. 0. 0. ::, ..,._ ii "' ii i ::, u ,s 0 ~ " z " • 0 ~ z "!. " ":." • ~ <J] -·o '-'l 0. ~ I--..0 -..0 "'
MW-I 7/31/01 5-7 0.03 BDL BDL 0.01 0.033 BDL 0.014 BDL 0.130 0.03 0.034 0.190 BDL
MW-I 7/31/01 10-12 BDL 6.2 9.0 BDL 4.8 5.5 BDL 7.6 7.8 32.0 25.0 18.0 BDL
MW-I 7/31/01 15-17 BDL BDL BDL BDL BDL BDL BDL BDL 0.80 0.770 0.730 0.380 BDL
MW-I 7/31/01 20-22 BDL BDL BDL BDL BDL BDL 1.3 BDL 0.540 2.300 2.100 0.940 BDL
MW-2 7/31/01 5-7 0.039 BDL BDL 0.010 0.046 BDL 0.020 0.008 0.130J 0.036 0.044 0.220 BDL
MW-2 7/31/01 10-12 0.033 0.046 0.030 0.010 0.090 0.016 0.084 0.067 0.160J 0.210J 0.250J 0.430J BDL
MW-2 7/31/01 15-17 BDL 3.9 BDL BDL 13 BDL 17 II 6.3 47 51 82 BDL
MW-2 7/31/01 20-22 BDL 0.022 0.017 BDL 0.041 0.0071 0.035 0.037 0.062 0.610 0.600 0.270 0.280
0.0056 I 4 [3 1.9T7 0.24 * 0.58 2 7 8 7 5 *
22 156 156 0.0075 1560 * 63 156 3200 782 782 32000 *
200 4088 4088 0.067 40000 * 1635 4088 82000 20440 20440 200000 *
• Indicate method detection limit for contaminants when analyzed, but not detected (e.g.,< 1, 10, 42)
• List any contaminant detected above the method detection limit
• MSCC = maximum soil contamination concentration
• ft. BGS = feet below ground surface
• Results must be reported in mg/kg .
• mg/kg =milligrams per kilogram
• *NoMSCC
• J = estimated value
Table 1 (continued)
Summary of Historical Analytical Results -Soil Sampling
Texaco Food Mart #2
Date: 5/02
Incident Number 22332
8260 J 8260 8260 8260 8260 8260 8260 8260 8260 I 8260 I 8260 18260 I 8260
I " " :g " " " ~ " " ~ >, >, ~ " :g 1l -s -s "' :g " -s 2 " " " :g " ..0 " .0 s s ~ " ~ " " ..0 0 ~ ,; >, ·c ·c: g ~ l! 00 " s " I C. ... :g ... :g :g ..0 JS ~ :, O;l ,] >, e e " ' " ' " co C. 0.. :, .... ~ "1. ~ i :,
" -s ~ co " z " N ·~ 0 :£ z C"!" "1." ....:o ~ :a ' co "' "' -..0 -..0 N
B-30 4/26/02 15-17 BDL 6.1 2.3 BDL 19.0 1.6 21.0 16.0 15.0 91.0 29.0 120.0 BDL
B-30 4/26/02 10-12 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
B-31 4/26/02 15-17 BDL BDL BDL BDL BDL BDL 0.074 BDL BDL BDL 0.013 BDL 0.088
B-32 4/26/02 15-17 0.053 0.030 0.013 BDL 0.084 BDL 0.018 0.065 0.1901 0.2201 0.100 0.5101 0.071
B-33 4/26/02 15-17 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
B-34 4/26/02 15-17 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
B-35 4/26/02 15-17 BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL BDL
0.0056 I 4 13 I 1.97' 0.24 • 0.58 2 7 8 7 5 I *
22 156 156 0.0075 1560 * 63 156 3200 782 782 32000 *
200 4088 4088 0.067 40000 * 1635 4088 82000 20440 20440 200000 *
• Indicate method detection limit for contaminants when analyzed, but not detected (e.g.,< I, 10, 42)
• List any contaminant detected above the method detection limit
• MSCC = maximum soil contamination concentration
• ft. BGS = feet below ground surface
• Results must be reported in mg/kg .
• mg/kg =milligrams per kilogram
• *NoMSCC
• J = estimated value
I
*
MW-I I 7/31/01 I
MW-2 I 7/31/01
MW-3 I 10/8/01
MW-4 10/8/01
MW-5 4/4/02
MW-6 I 414102 I
T-1 I 10/9/0] I
Table 2
Summary of Well Construction and Groundwater Elevation Data
Date: 4/02
Texaco Food Mart #2
Incident Number 22332
4/22/02 20 20-35 35 100.00 22.13 NA 77.87
4/22/02 20 20-35 35 I 00. 19 22.08 NA 78.11
4/22/02 15 15-35 35 100.19 21.93 NA 78.26
4/22/02 15 15-35 35 99.40 21.91 NA 77.49
4/22/02 20 20-35 35 100.39 23.34 NA 77.05
4/22/02 15 15-25 25 101.42 23.02 NA 78.40
4/22/02 85 85-90 90 100.35 22.06 NA 78.29
Reference Point for Elevation Measurements MW-I, Assumed Elevation: 100.00ft.
Type II Well
Type II Well
Type II Well
Type II Well
Type II Well
Type II Well
Type III Well
** If free product is present in a well, groundwater elevation should be calculated by: [Top of Casing Elevation -Depth to Water]+ [free product thickness x
0.8581]
ft BGS = feet below ground surface
NA -Not Applicable
H:\Assessment (0130)\2000\1001289\Well Construction Table.doc
WSW-I I Flowerest 0. Lopp
WSW-2 I Paul & Stella Baker
WSW-3 I Margaret H. Fuller
WSW-4 I Hoyle R. Smith
WSW-5 I Efrrd E. Jr. & Kay S.
Wilson
WSW-6 I Abe Cassidy
WSW-7 I Samuel C. Davis
WSW-8 I Maxine C. Houck
WSW-9 I Thomas Frank
WSW-JO I James G. Henderson
WSW-I I Ray S. & Irene
Musgrave
Ft BGS = feet below ground surface
NA -Not Accessible
Table 4
Receptor Information
Date: 10/01
Texaco Food Mart #2
Incident Number 22332
\ P.O. Box 284 Lexington, NC NA Drinking
I I 04 Fuller Rd., Lexington, 336-357-Not in Use NC 523 I
I 106 Fuller Rd., Lexington, 336-357-I Not in Use NC 2659
115 Cedar Ln., Lexington, 336-357-\ Drinking NC 2916
500 Maegeo Dr., Lexington, 336-249-I Not in Use NC 3266
Box 8 Mayfair Rd., 336-357-I Not in Use Lexington, NC 2485
I Box I 00 Mayfair Rd., 336-357-I Not in Use Lexington, NC 2565
I Box I 08 Mayfair Rd.,
Lexington NC NA \ Drinking
I Box I 07 Mayfair Rd,
Lexington, NC I NA I Not in Use
Box I 03 Mayfair Rd., I NA I Not in Use Lexington, NC
1724 Southview Rd., I NA I Not in Use Lexington, NC
H:\Assessment (0130)\Master Reports\Water Supply Well Information Table.doc
I 185 I 4" I ? I ? I 450'
I ? I ? I ? I ? I 700'
I ? I ? I ? I ? I 650'
I ? !? I ? I ? I 985'
I ? I ? I ? I ? I 750'
I ? I? I ? I ? I 760'
I ? I? I ? I ? I 795'
I >100 I 4" I ? I ? I 1025'
I ? I? I ? I ? I 1090'
I ? I? I ? I ? I lI00'
I ? I? I ? I ? I ll75'
-aceAnatyticar
www.pacelsbs.com
May 09, 2003
Ms. Colleen Clark
Shield Engineering
4301 Taggart Creek Road
Charlotte, NC 28208
RE: Lab Project Number:
Client Project ID:
Dear Ms, Clark:
9243963
TFM#2 1001289
Pac, Analyt/ca/ Ssrv/css, Inc.
9800 Kincey Avenue, Suit, 100
Huntersville, NC 28018
Phone: [phone]
Fax: [phone]
Enclosed are the analytical results for sample(s) received by the laboratory on May 1, 2003, Results reported
herein conform to the most current NELAC standards, where applicable, unless otherwise narrated in the body of
the report,
If you have any questions concerning this report please feel free to contact me.
Sincerely,
Bonnie Killllla
Bonnie,[e-mail]
Project Manager
Enclosures
LaboratPry Certification \Os
NC Wastewater 12
NC Drinking Water 37706
SC 99006
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, exctipt in full,
without 1he written consent of Pace Analytical Services, Inc.
Laboratory Certification IDs
KY Drinking Water 90090
VA Orinkin11 Water 213
FL NElAP E87627
Lab Sample No: 922953898
Client Sample ID: MW-01
Pacs Analytical Ssrvices, Inc.
9800 Kincey Avenue, Suite 100
Huntersville, NC 28078
Phone: [phone]
Fax: [phone]
Lab Project Number: 9243963
Client Project ID: TFM#2 1001289
Project Sample Number: 9243963-001
Matrix: Water
Date Collected: 04/30/03 13:50
Date Received: 05/01/03 16:10
£•~•r~am=•~•~•~r~•-----------~•m•~•~u~l~•~•--__ Un=,~·•~•~ Report Limit~ Analyzed By CAS No.
Naphthalene 270 ug/1 20. 10.0 05/03/03 15:03 STC 91-20-3
Date; 05/09/0J
J aboratorv Certification IDs
NC Wastewater 12
NC Drinking Water 37706
SC 99006
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in fun,
without the written conssnt of Pace Analytical Services, Inc.
Labaratorv Certification ms
KY Drinking Water 90090
VA Drinking Water 213
Fl NEtAP E87627
Page: 2 of 21
w1•t-w.,oacelab.s.com
Lab Sample No: 922953906
Client Sample ID: MW-02
Parameters
Naphthalene
Date: oS/09/03
laboratory Certification /Os
NC Wastewater 12
NC Drinking Water 37706
SC 99006
Results
1400
Units
ug/1
Pac, Analytical S11rvit:1s, Inc.
9800 Kincey Avenue, Suit, 100
Huntersville, NC 28018
Phone: [phone]
Fax: [phone]
Lab Project Number: 9243963
Client Project ID: TFM#2 1001289
Project Sample Number: 9243963-002
Matrix: Nater
Date Collected: 04/30/03 14:00
Date Received: 05/01/03 16:10
Report Lilllit _m;'__ Analyzed ~y CAS No.
40. 20.0 05/03/03 15:44 STC 91-20-3
QMli__ ReqL?nt
1
Page: 4 of 21
REPORT OF LABORATORY ANALYSIS laboratory Li!rtif!cation IDs
KY Drinking Water 90090
This report shall not be reproduced, except In f111t,
without the written consent of Pace Analytical Services, Inc.
VA Drinkin11 Water 213
FL NH.AP E87627
w11Af,pacelabs,tom
Lab Sample No: 922953914
Client Sample ID: MW-03
Pace Anatyt/cat Services, Inc.
9800 Kincey Avenue, Suile 100
Hunrersvifle, NC 28018
Phone: [phone]
Fax: [phone]
Lab Project Number: 9243963
Client Project ID: TFM#2 1001289
Project Sample Number: 9243963-003
Matrix: Water
Date Collected: 04/30/03 14:15
Date Received: 05/01/03 16:10
••~•~ram=•~•~•~r~•---------~ -~•~•~•~u~l•~•~-~U~n~i~•~•~ Report Limit __ru'___ Analyzed By ~c~•~•~No~-~-Qual RegLmt
91-20-3 Naphthalene 660 ug/1 100 50.0 05/06./03 01:50 STC
Date: 05/09/03
I abnratort Certification IDs
NC Wastewater 12
NC D,inking Water 37706
SC 99006
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in fUII,
without the written consent of Pace Analytical Services, Inc.
Laborawv Certificatio11 ms
KY Drinking Water 90090
VA Drinking Water 213
FL NEL.AP E87627
Page: 6 of 21
c1ceAnalyticar
www,pacelabs.com
Lab Sample No: 922953922
Client Sample ID: MW-04
parameters
Naphthalene
Date: 05/09/03
I atmrato()I Ce1@cation \Os
NC Wastewater 12
NC Drinking Water 37706
SC 99006
Results
ND
units
ug/1
Pace Analytical Services, Inc.
980() Kincey Avenue, Suite 100
Huntersville. NC 29018
Phone: [phone]
Fax: [phone]
Lab Project Number: 9243963
Client Project ID: TFM#2 1001289
Project Sample Number: 9243963-004
Matrix: Water
Date Collected: 04/30/03 14:25
Date Received: 05/01/03 16:10
Report Limit ___Qr__ Analyzed By ~c~A~S~N~o~·~-Qytl__ RegLmt
91-20-3 2.0 1.0 05/07/03 06:31 STC
Page: 8 of 21
REPORT OF LABORATORY ANALYSIS LaboratorY Certification IDs
KY Drinking Water 90090
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, Inc. VA Drinking Water 213
Fl NELAP E87627
www.pacelaM.com
Lab Sample No: 922953930
Client Sample ID: MW-05
Parameters
Naphthalene
Date: 05/09/03
Laborawrv CtictificsUon IDs
NC Wastewater 12
NC Drinking Water 37706
SC 99006
Results
ND
PaCB Analytical Ssrvlcss, Inc.
9800 Kincey Avenue, Suite 100
Huntersville, /IC 28018
Phone: [phone]
Fax: [phone]
Lab Project Number: 9243963
Client Project ID: TFM#2 1001289
Project Sample Nwnber: 9243963-005
Matrix: Water
Date Collected: 04/30/03 14:35
Date Received: 05/01/03 16:10
Units Report Limit~ Analyzed By CAS No. ~~
ug/1 2.0 1.0 05/06/03 03:13 STC 91-20-3
Page: 10 of 21
REPORT OF LABORATORY ANALYSIS Laboratory Certification IDs
KY Drinking Water 90090
This report shall not be reproduced, except in full,
without !he written consent of Pace Analytical Services, Inc. VA Drinking Water 213
FL NELAP E87627
aceAnalyticar
WY1W.P1Jcelabs .. con1
Lab Sample No: 922953948
Client Sample ID: MW-06
Pac• Analytical Ssrv/cBs, Inc.
9800 Kincey Avenue. Suite 100
Huntersville. NC 28018
Phone: [phone]
Fax: [phone]
Lab Project Numbe~: 9243963
Client Project ID: TFM#2 1001289
Project Sample Number: 9243963-006
Matrix: water
Date Collected: 04/30/03 14:50
Date Received: 05/01/03 16:10
~•~•r~am=•~•~•~r~•---------~ -~•~•~•~•~l•-•~-~U~n~i~t~•~ Report Limit ___fil___ Analyzed By ~C~A~s~No~-~-Qytl__ RegLmt
91-20-3 Naphthalene ND ug/1 2. 0 1, 0 05/03/03 18: 28 STC
Date: 05/09/03
I ahoratoey Certificalion IDs
NCWastewater 12
NC Drinking Water 37706
SC 99006
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, Inc.
Laboratory Certification ms
KY Drinking Water 90090
VA Drinking Water 213
FL NElAP E87627
Page: 12 of 2l
w11Av.pacelabs . .com
Lab Sample No: 922953955
Client Sample ID: T-01
Pace AnaJylica/ Ssrv/cBs, Inc.
9800 Kincey Avenue, Suite 100
Huntersville, NC 28018
Phone: [phone]
Fax: [phone]
Lab Project Nwnber: 9243963
Client Project ID: TFM#2 1001289
Project Sample Number: 9243963-007
Matrix: Water
Date Collected: 04/30/03 15:00
Date Received: 05/01/03 16:10
••~•~ram=•~t~•~r~•-----------~•~•-•-u~l-t~•--__ U~•~i~t-•~ Report Limit ..J2L_ Analyzed By _C~AS=~•~o~·--Qual ReqLmt
91-20-3 Naphthalene 3 .1 ug/1 2. 0 1. 0 05/03/03 19: 08 STC
Date: 05/09/0J
I at,oratory Ctrtilimilion ms
NC WaslBwater 12
NC DrinklnQ Water 37706
SC 99006
REPORT OF LABORATORY ANALYSIS
Ttils report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, Inc.
Laboratory Certmcation IDs
KV Drinking Water 90090
VA Drinkina Waler 213
Fl NELAP E87627
Page: 14 of 2l
wM.v.pacelabs-.com
QC Batch: 73854
QC Batch Method: EPA 601/602
Associated Lab Samples:
METHOD BLANK: 922957840
922953898
922953948
QUALITY CONTROL DATA
Pace Analytical Services, Inc,
9800 Kincey Avenue, Suite 100
Huntersville, NC 28()18
Phone: [phone]
Fax: [phone]
Lab Project Nwnber: 9243963
Client Project ID: TFM#2 1001289
Analysis Method: EPA 601/602
Analysis Description: Halogen, & Aromatic Vol, Orgs.
922953906 922953914 922953922 922953930
922953955
Associated Lab Samples: 922953898 922953906 922953914 922953922 922953930 922953948 922953955
Paramete;:
DichlorodifluorOlllethane
Chlorometbane
Vinyl chloride
Bromomethane
Chloroethane
Trichlorofluoromethane
1,1-Dichloroethene
Methylene chloride
trans-1,2-Dichloroethene
1,1-Dichloroethane
Chloroform
1,1,1-Trichloroethane
carbon tetrachloride
1,2-Dichloroethane
Trichloroethane
1,2-Dichloropropane
Bromodichloromethane
cis-1,3-Dichloropropene
trans-1,3-Dichloropropene
1,1,2-Tricbloroethane
Tetrachloroethene
Dibromochloromethane
Bromoform
1,1,2,2-Tetrachloroethane
Methyl-tert-butyl ether
Diisopropyl ether
Benzene
Toluene
Chlorobenzene
Ethylbenzene
Date: 05/09/03
I ab oratory Certifir.ation IDs
NC Wastewater 12
NC Drinking Water 37706
SC 99006
Units
ug/1
ug/1
ug/1
ug/1
ug/1
ug/1
ug/1
ug/1
ug/1
ug/1
ug/1
ug/1
ug/1
ug/1
ug/1
ug/1
ug/1
ug/1
ug/1
ug/1
ug/1
ug/1
ug/1
ug/1
ug/1
ug/1
ug/1
ug/1
ug/1
ug/1
Blank Reporting
Result Limit Footnotes
ND 1.0
ND 2, 0
ND 1.0
ND 1.0
ND 1.0
ND 1.0
ND 1.0
ND 2.0
ND 1.0
ND 1.0
ND 1.0
ND 1.0
ND 1.0
ND 1.0
ND 1.0
ND 1.0
ND 1.0
ND 1.0
ND 1.0
ND 1.0
ND 1.0
ND 1.0
ND 1.0
ND 1.0
ND 1.0
ND 1.0
ND 1.0
ND 1.0
ND 1.0
ND 1.0
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, Inc.
Page: 16 of 21
Laboratorv Certification IDs
KY Drin~ing Water 90090
VA Drink'111g Water 213
FL NELAP E87627
aceAnalyticar
w1•1w.pscelebs.ccm
LABORATORY CONTROL SAMPLE: 922957857
Parameter
Bromoform
1,1,2,2-Tetrachloroethane
Methyl-tert-butyl ether
Diisopropyl ether
Benzene
Toluene
Chlorobenzene
Ethylbenzene
m&p-Xylene
a-xylene
1,3-Dichlorobenzene
1,4-Dichlorobenzene
1,2-Dichlorobenzene
l-Chloro-3-fluorobenzene (S)
MATRIX SPIKE: 922957865
Parameter
Dichlorodifluoromethane
ChlorOll'lethane
Vinyl chloride
Bromomethane
Chloroethane
Trichlorofluoromethane
1,1-Dichloroethene
Methylene chloride
trans-1,2-Dichloroethene
1,1-Dichloroethane
Chloroform
1,1,1-Trichloroethane
Carbon tetrachloride
1,2-Dichloroethane
Trichloroethene
1,2-Dichloropropane
BrOll'lodichloromethane
Date: 05/09/03
l aboratocv Cutificalioo IDs
NC Wastewater 12
NC Drinking water 37706
SC 99006
Jmits
ug/1
ug/1
ug/1
ug/1
ug/1
ug/1
ug/1
ug/1
ug/1
ug/1
ug/1
ug/1
ug/1
Units
ug/1
ug/1
ug/1
ug/1
ug/1
ug/1
ug/1
ug/1
ug/1
ug/1
ug/1
ug/1
ug/1
ug/1
ug/1
ug/1
ug/1
QUALITY CONTROL DATA
Lab Project Nwnber:
Client Project ID:
Spike LCS LCS
Cone. Result % Rec Footnotes
20.00 19.26 96
20, 00 21.05 105
20.00 18.72 94
20.00 19.85 99
20.00 18.01 90
20.00 17. 65 88
20.00 22.24 111
20.00 18.31 92
40.00 36 .30 91
20.00 17.25 86
20. 00 25.37 127
20 .oo 23.97 120
20 .00 25.66 128
120
922956248 Spike MS MS
9243963
Pac• Analytical Ssrv/cBs, Inc.
9800 Kincey Avenue. Suite 100
HunletSville. NC 28018
Phone: 704,875.9092
Fax: 104.815.f/091
TFM#2 1001289
Resglt ~ B,gsult %....!l§Q Footnotes
0 20 .00 23.60 118
0 20 .oo 18.76 94
0 20.00 17.18 86
0 20.00 27. 67 138
0 20.00 18.78 94
0 20 .oo 22.27 111
0 20 ,00 28'.11 140
0 20 .oo 17.68 88
0 20.00 25.65 128
0 20 .00 19.63 98
0 20 .oo 17. 78 89
0 20.00 17.64 88
0 20.00 16.48 82
27 .32 20 .00 45.51 91
0 20.00 21. 70 108
0 20.00 18.37 " 0 20 .00 18.43 92
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, Inc.
Page: 18 of 21
Laboratarv Csrt!Cfflon ms
KY Drinking Water 90090
VA Drinking Water 213
Fl NflAP E87627
www.pacelabs,com
MATRIX SPIKE & MATRIX SPIKE DUPLICATE:
Parameter
Bromodichloromethane
cis-1,3-Dichloropropene
trans-1,3-Dichloropropene
1,1,2-Trichloroetbane
Tetrachloroethene
Dibromochloromethane
Bromoform
1,1,2,2-Tetracbloroethane
Methyl-tert-butyl ether
Diisopropyl ether
Benzene
Toluene
Chlorobenzene
Ethylbenzene
m&p-Xylene
a-Xylene
1,3-Dichlorobenzene
1,4-Dichlorobenzene
1,2-Dichlorobenzene
1-Chloro-3-fluorobenzene (S)
Date: 05/09/03
I aboratnry Certification IDs
NC Wastewater 12
NC Drinking Water 37706
SC 99006
Units
ug/1
ug/1
ug/1
ug/1
ug/1
ug/1
ug/1
ug/1
ug/1
ug/1
ug/1
ug/1
ug/1
ug/1
ug/1
ug/1
ug/1
ug/1
ug/1
QUALITY CONTROL DATA
Lab Project Number:
Client Project ID:
922957873 922957881
922957287 Spike MS MSD
9243963
Pace Analytical Servlcss, Inc.
9800 Kincey Avenue, Suite 100
Huntetsville, NC 28018
Phone: [phone]
Fax: [phone]
TFM#2 1001289
MS MSD
R§ISUlt ~ Result Result % Rec % Rec RPD Footnotes
0 20.00 21.18 22. 39
0 20 ,00 17.03 17. 84
0 20 .00 18,72 19. 59
0 20 .00 20 .85 21. 74
0 20 .oo 22.86 24. 34
0 20.00 18,83 19 • 37
0 20 .00 18.60 18. 68
0 20.00 19.58 18 • 97
0 20 .00 19.02 19. 03
0 20.00 19.59 19. 89
0 20 .oo 17.42 17. 92
0 20.00 17.35 17. 48
0 20.00 20. 78 21. so
0 20 .00 17.79 18. 20
0 40.00 34.97 35. 80
0 20 .00 17 .07 17. 26"
0 20 .oo 24.47 25. 27
0 20 ,00 24.77 26". 49
0 20 .00 26.42 28.16
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, Jnc.
106 112 6
85 89 5
94 98 5
104 109 4
114 122 6
94 97 3
93 93 0
98 95 3
95 95 0
98 100 2
87 90 3
87 87 1
104 108 3
89 91 2
87 90 2
85 86 1
122 126 3
124 132 7
132 141 6
96 95
Page: 20 of 21
Laboratory Certification ms
KY Drinking Water 90090
VA Dririking Water 213
FL NELAP E87627
Ghent --
Name Holding Brothers
Project
No: 1001289 Task: 403
Project
Na111e: Texaco Food Mart #2
Chain of
Custody
#: Z . .f:, ·,;z_::;G
,,ff!:1SHIELD ~ EN(>IIJLl.'l~ING. 11-,c
::,(;~;-0:t,:~'S,i;:;'~~ •. \)rl:\i·J~:;;,Ji~;;o;t'l':,'.,';'.t~~:[~;t-l\.1{"_1'\/\/r= I ::1 ·-;,,_~ J:J.·fl.jJ Pl --:,1 "-'~;,I ~-nr-.:,~t:::fif;.,-t{t;~;;_;¼hlci.ifi!%.S:t½~t£#i::,~l-~~~_;,Jd,_i,•_4fli:.!iH'!l~.fr~)@~~~~~~'t:.'f-:1'4l~~-,:;&~11~
G ~ -e: ·o in <ii
"' ->
C: .c "' ' I -_s .. I ·;;; a. _, a.
ai _, "' ro ., "' <ii () 0 ., s 0 ro -C: 0 <ii s .c: X a. u 0. 0 u :c "' 0 f--§ 0 f--f--I (/) a. _,
~Il\'-01 I 100.Uil I 3:S .ll I IC,,,,\)& rv n Ni\
~I\\'-02 I 100. 19 I 3 >/ 7"> ,~ .7[) N /\ /\J/1
MW-OJ I 100.19 I <f;,tn l G 50 _,ti() JV.iC!
MW-04 I 99.40 I :;its i /C:-"78 .1\//1 /14
MW-05 J 100.39 I >'c-r: l i {7,l\-11 NA IJ ~
MW-06 101.42 2.. '! .'1 ·, I 8,02-/\Ill !114
,:,,.71 Jr;_ 71 T-01 100.35 /1/17 ,V ,,
·----· ..
Date: d JU · u;
Sampled by: _ 5;.::°) Sri!\/ .".·~()
Weather Conditions: f.; ,, t' v, De,:,,
Laboratory Data Entered by: -------Laboratory:
Page 1 of 1
H \Assessment\ 199411940082\ncwellsamptelog xis
" <= ·o· <ii c.; w f---c <0 :,
0 u L.. ... (1) •• !!-2 X 0 2,." a:, . --E_. u LL > -~•. ,_.._,
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"' ·E 0 "' ' ., :, ,_,' ' ai -· '::J ·:.) ~:' t3 () . (5"'' 0 -~ () ~ <( () a.
,/.0 X>I(;_/, ,,-.
5 3, /'/-.'8./) Z .'/ 0 87 n,,,<!.['.,, p.
Q:>1-'t," ~.x-,l
8 3 ,ff, _-:;-;t,o<J.,
(;i__;J.,;, 8 e,, r~-~-f, ~7 8 C/ Jo c,.,c
'-: .:, b"t 'to _:;o.1,,.f -~'o/ Jc ,..-. ., ZIG '_ 8T' i:Dpoefl., . ,, ) :J
fO JV'(;.'
8Z,1! Z 17 , c'. '6'.i fl c,· ,•'vri Cf, / 'I-ZS • J • .:i
Bi.rs· IG. ~ 1 c. fi 7 S.o, 1£.05 ,vo
l\11,'("(Cl 1'1¼
7 .'3 ,µo J<J.,;o 1'.,'.; SLlO G. ' I. II -~-'s 'Vn<C s
I I. r 1 l'S'.Q .5,~IV,0i 1'.Soo 83SG c-1. 'l l I .v-.11 OYtil. .. -
•* 'Tt:> ·; .. r1 ._ iJ I: vn-1 s-(,. F\\J C. €. j) ·t--3 0 -0:,
Corrected depth to water= Static depth to water (C) -(Product thickness x specific gravity)
SQ.ecific Grav1\ies
Gasoline 75
Diesel 82
Vo1tJme Coefficient
1" = .04 gal/hn Ft
2" = 16
3" = 37
4'" = 65
5·· = 1 47
8'"=260
10" = 4, l
12" = 5 9
SHIELD ENGINEERING, INC. [phone]
4301 Tog go rt Creek Rood [phone]
Charlotte, NC 28208 Fox [phone]
SOIL BORING LOG
Project Texoco Food Mort /1.2
Address 1700 Cotton Grove Road
Baring Number AS-1 Date Drilled 3L13Lo3
Sample Method Not AQQlicoble Drilling Method l::ISA
Completion Details See Lon
Driller McCall BrQ(her' § In~. Log by JS
Sample ID Rec. Blow LITHOLOGY DEPTH (ft) Counts Interval
L_ 0 ---0-3" Asphalt/Gravel ,__ -
L_ 5 -3"-1' Backfill Material .
~ -. 1'-3' Gravel .
'-10 -: 3'-8' Orange Silty SAND
•
~ -8'-18' Reddish Sandy SILT
'-15 -18' -23' Wet Brown SILT, Odor .
L_ -23'-45' Wet Brown SILT, Strong Odor •.
~ 20 -. .
,__ -: . I
~ 25 -• . ,.·
,__ -. ··-.
;
~ 30 -; .
,__ -.
~ 35 -. • ,__ -
,~ 40 -I ' IL_ -\:'--I' '~ ·~ 45 -.2_: 1:.:..:,
,~ -
II-50 -
2" DIA. WELL SET AT 45 FT.
0"-42.5' SOLID PVC RISER
42.5' -45' 0.010 SLOTTED PVC
SAND TO 2' ABOVE SCREEN
2' BENTONITE PLUG
GROUT TO GRADE
SHIELD ENGINEERING, INC.
4301 Taggart Creek Rood
Charlotte, NC 28208
[phone]
[phone]
Fox [phone]
SOIL BORING LOG
Project Texaco Food Mort #2
Address 1700 Cotton Grove Rood
Boring Number _T""W'--..,,2 __________ _ Dote Drilled ..c.3,__/1-'3"--/..c..03=--------
Drilling Method ...,H.,.Su:,A~-------Sample Method ""'N""o~t_A=p=pl""ic""ob""le=---------
Completion Details ....::.Se~e'-='lo~-----------------------
Driller McColl Brother's Inc. Log by -"J"-S __________ _
DEPTH
5
10
15
20
25
30
35
40
45
50
Sample ID Rec.
(fl)
Blow
Counts Interval
0-4"
4"-1'
1'-6'
6'-9'
9' -11'
11 • -18'
18'-23'
23'-35'
LITHOLOGY
Asphalt/Grovel
Backfill Material
Orange SILT
Orange SAND, Trace Silt
Purple SILT, Trace SAND
Moist Orange SILT
Wet Brown SILT, Slight Odor
Wet Brown SILT, Slight Odor
1 " DIA. WELL SET AT 35 FT.
0"-10' SOLID PVC RISER
10'-35' 0.010 SLOTTED PVC
SAND TO 2' ABOVE SCREEN
2' BENTONITE PLUG
GROUT TO GRADE
SHIELD ENGINEERING, INC.
4301 Taggart Creek Rood
Charlotte, NC 28208
SOIL BORING LOG
Project Texaco Food Mort #2
Address 1700 Cotton Grove Rood
Boring Number ...,TW.,_,____-...,_4 _________ _
Sample Method ...!N.!.>o'-'-t..,_A.,.,D,cDl::.,,iCc,e:Ob,c:;le,:__ ______ _
Dote Drilled
Drilling Method
3/14/03
HSA
[phone]
[phone]
Fax [phone]
Completion Details ---"'S:<:ee"-"-lo=-------------------------
0riller McColl Brother's Inc. log by ..,.JS,._ _________ _
DEPTH
5
10
15
20
25
30
35
40
45
50
Sample ID Rec.
(ft)
Blow
Counts Interval
0-3"
3"-1'
1 '-4'
4'-9'
9'-12'
12•-14'
14' -23'
23'-35'
LITHOLOGY
Asphalt/Grovel
Backfill Material
Red, Orange CLAY
Orange Sandy SILT,
Orange SILT
Orange SILT, Strong Odor
Wet Orange SILT, Trace Sand,
Wet Brown SILT, Strong Odor
1" DIA. WELL SET AT 35 FT.
0"-10' SOLID PVC RISER
10'-35' 0.010 SLOTTED PVC
SAND TO 2' ABOVE SCREEN
2' BENTONITE PLUG
GROUT TO GRADE
Strong Odor
1> (Ar,¢N t~•r'I
' ,,,.,,..~-J _,,_._.....,
TIOZ. )t'nl
PILOT STUDY #1
Texaco Food Mart #2
Air Sparging Pilot Study (AS-1)
March 18, 2003
ELAPSED TIME (MIN) Sparge Pressure (psi) Sparge Flow (cfh)
45
40
=i 35
,S: 30 ~ 25 I 20
a. 15
~ 10
5
0
0
30
60
90
120
150
180
210
240
270
300
330
360
25
30
30
35
35
35
40
40
40
40
40
40
40
Air Sparging Pilot Study (AS-1)
Pressure (psi) and Flow (scfm) VS. Time
0 30 60 90 120 150 180 210 240 270 300 330 360
Elapsed Time (min)
H: \ENG\2000\ 1001289\pilotstudydata. xis
0
30
30
60
60
60
90
90
90
90
90
90
90
100
80 E'
60 £
l 40 .: <
20
0
-+-Sparge Pressure (psi) .
---Sparge Flow (cfh)
PILOT STUDY #1
Texaco Food Mart #2
Air Sparging Pilot Study (AS-1)
March 18, 2003
ELAPSED TIME (MIN) AS-1 TW-2 TW-3 TW-4 MW-1
Depth to Water (feel)
0 17.83
30 .
60 .
90 .
120 .
150 .
180 .
210 .
240 .
270 .
300 .
330 .
360 .
18.53 18.66 18.81
18.41 18.22 18.82
18.31 18.06 18.80
18.27 18.03 18.80
18.15 17.61 18.79
18.09 17.33 18.79
18.02 17.03 18.76
17.96 16.82 18.76
17.88 16.48 18.72
17.88 16.28 18.71
17.75 16.20 15.99
17.75 16.02 17.28
17.68 15.96 17.74
Air Sparging Pilot Study (AS-1)
Depth to Water (feet) vs. Time Elapsed Time (min)
18.72
18.60
18.54
18.46
18.45
18.38
18.33
18.28
18.21
18.20
18.15
18.01
18.09
MW-2
19.19
17.11
16.76
16.10
15.56
15.28
14.54
13.90
13.45
13.22
13.03
12.81
12.13
0 30 60 90 120 150 180 210 240 270 300 330 360
12.00
13.00
§: 14.00
~ t 15.00
~ 16.00
.c 17.00 15. ,!l 18.00
19.00
20.00
H:lENG\2000\ 1001289\pilotstudydata.x/s
MW-3
18.14
18.17
18.15
18.20
18.21
18.17
18.29
18.13
18.12
18.13
18.13
18.13
18.13
-li!--TW-2
......_TW-3
......_TW-4
MW-1
~-MW-2
-t-MW-3
-VE-1
VE-1
18.51
18.41
18.33
18.23
18.09
17.98
17.84
16.72
17.55
17.42
17.35
17.22
17.17
PILOT STUDY #1
Texaco Food Mart #2
Air Sparging Pilot Study (AS-1)
March 18, 2003
AS-1 I TW-2 I TW-3 I TW-4 I MW-1 MW-2 ELAPSED TIME (MIN) Dissolved O vnen Im< /Ll
0
30
60
90
120
150
180
210
240
270
300
330
360
10.00 -...I 8.00
c!J 6.00 E -4.00 0 C 2.00
0.00
.
.
-
-
-.
.
-.
.
.
-
-
4.73 5.66 7.10
4.69 3.87 6.77
4.96 3.80 6.68
4.40 3.94 7.00
4.29 3.55 6.71
4.32 3.74 6.53
4.20 3.50 6.51
3.91 3.23 6.50
3.92 3.11 tl.50
3.59 2.97 6.41
3.48 3.15
3.51 3.42 8.65
3.43 3.69 8.87
Air Sparging Pilot Study (AS-1)
Dissolved Oxygen (mg/L)
0.83 1.51
0.95 0.65
0.58 0.54
0.57 0.62
0.59 0.55
0.64 1.10
0.63 0.68
0.62 0.56
0.b2 1.76
0.55 3.58
0.55 4.71
0.53 5.62
0.58 6.02
0 30 60 90 120 150 180 210 240 270 300 330 360
Elapsed Time (min)
H:\ENG\2000\ 10012891pilotstudydata.x/s
MW-3
1.60 .
0,57
0.55
0.49
0.54
0.61
0.93
1.70
0.55
0,56
0.49
0.51
--+-TW-2
-+-TW-3
MW-2
-11--MW-3
-M-VE-1
-t-MW-1
-llE-TW-4
VE-1
5.02
5.45
5.20
5.40
4.84
5.85
5.55
5.22
4.95
4.37
4.55
4.25
4.31
PILOT STUDY #1
Texaco Food Mart #2
Air Sparging Pilot Study {AS-1)
March 18, 2003
ELAPSED TIME (MIN)
0
30
60
90
120
150
180
210
240
270
300
330
360
20.00
-;-15.00
"" -10.00 s
5.00
0.00
AS-1
.
.
.
.
.
.
.
.
.
.
.
.
.
TW-2 TW-3 TW-4 MW-1
Oxygen Content (%)
20.70 21.10 21.00 16.40
18.40 10.60 20.00 12.50
9.30 9.17 20.40 15.20
8.90 14.30 20.80 16.80
10.20 11.60 20.70 16.50
9.10 7.80 21.00 17.00
7.50 7.00 19.10 16.20
6.90 7.00 18.90 16.00
6.80 7.00 20.80 17.30
6.10 7.10 20.60 18.40
5.60 6.60 21.20 16.90
5.50 7.10 21.20 19.10
5.30 8.10 21.20 19.00
Air Sparging Pilot Study (AS-1)
Oxygen Content (%)
MW-2
6.10
8.70
12.00
10.40
13.60
12.50
11.00
7.90
11.20
5.20
3.80
9.00
12.60
0 30 60 90 120 150 180 210 240 270 300 330 360
Elapsed Time (min)
H:\ENG\2000\ 1001289 \pi/otstudydata.xls
MW-3
20.40
.
.
.
.
.
.
.
.
.
.
.
.
-+-TW-2
--TW-3
., MW-2
.. 0<-VE-1
-..MW-1
-+-TW-4
VE-1
20.10
19.20
16.30
16.30
14.30
13.20
14.00
12.50
11.40
10.60
10.20
9.40
9.00
PILOT STUDY #1
Texaco Food Mart #2
Air Sparging Pilot Study (AS-1)
March 18, 2003
ELAPSED TIME (MIN) AS-1 TW-2 TW-3 TW-4 MW-1 MW-2
Carbon Dioxide Content 1%1
..
0
30
60
90
120
150
180
210
240
270
300
330
360
20.0
15.0
.., -'>( ';fl 10.0 o-c
C
€ .. (.J
5.0
0.0
-
-
-
-
-
-
-
-
-
-
-
-
-
0.1 0.0 0.0
1.6 /.3 1.4
8.7 9.3 0.8
8.8 4.3 0.4
7.9 6.4 0.5
8.7 10.5 0.1
9.5 10.6 2.6
9.7 10.5 2.8
9.7 10.8 0.3
10.0 10.3 0.4
10.1 10.8 0.0
10.1 11.0 0.0
10.0 10.8 0.0
Air Sparging Pilot Study (AS-1)
Carbon Dioxide Content (%)
0.2 7.1
6.9 10.8
4.8 7.9
3.3 8.7
13.8 6.4
3.4 7.4
4.1 8.4
4.0 11.1
2.7 8.0
1.9 12.6
3.4 14.4
1.5 12.6
1.6 11.0
0 30 60 90 120 150 180 210 240 270 300 330 360
Elapsed Time (min)
H:\ENG\2000\ 1001289\pifotstudydata,xls
MW-3
0.2
-
-
-
-
-
-
-
-
-
-
-
--TW-2
........ TW-3
MW-2
~-VE-1
-'JIE-MW-1
-+-TW-4
VE-1
1.1
0.3
5.7
5.6
7.7
18.2
7.3
8.5
3.9
9.3
9.4
10.1
10.2
PILOT STUDY #1
Texaco Food Mart #2
Air Sparging Pilot Study (AS-1)
March 18 2003 .,
ELAPSED TIME (MIN) AS-1
0 -
30 -
60 -
90 -
120 -
150 -
180 -
210 -
240 -
270 -
300 -
330 -
360 -
100.0
~ o-80.0 g,e >-60.0 <> C: ·-., 40.0 c: c .. 0 E'u 20.0 0
0.0
TW-2 I TW-3 TW-4 MW-1
Or anic Vapor Content
3.0 0.0 0.5 0.9
0.1 24.9 0.8 0.0
0.7 28.3 0.8 0.3
1.1 20.5 0.7 0.4
0.9 20.1 0.9 0.4
2.0 36.8 0.09 0.5
1.2 92.3 2.2 0.5
2.4 45.8 3.2 0.8
2.0 46.1 0.9 0.5
1.8 56.2 0.8 0.6
2.3 68.0 0.2 0.9
3.4 71.8 0.2 0.6
2.3 78.1 0.3 0.6
Air Sparging Pilot Study (AS-1)
Organic Vapor Content (%)
MW-2 I
%)
99.0
99.0
99.0
99.0
99.0
99.0
99.0
99.0
99.0
99.0
99.0
99.0
99.0
0 30 60 90 120 150 180 210 240 270 300 330 360
Elapsed Time (min)
H: \ENG\2000\ 1001289\pilotstudydata.xls
MW-3 VE-1
0.4 0.4
-0.1
-2.8
-2.3
-3.2
-5.3
-3.6
-5.5
-9.2
-12.1
-15.4
-22.1
-29.2
--rw-2
--TW-3
' ·· ·ck" MW-2
-----MW-3
-.. :<-VE-1
-+-MW-1
-TW-4
PILOT STUDY #1
Texaco Food Mart #2
Air Sparging Pilot Study (AS-1)
March 18, 2003
AS-1 TW-2 I TW-3 TW-4 I MW-1 I MW-2 ELAPSED TIME (MIN) Differential Pressure inches water column)
0
30
60
90
120
150
180
210
240
270
300
330
360
0
-
-
-
-
-
-
-
-
-
-
-
-
-
-" " -
0.06 0.04 0.01 0.03
0.09 0.05 0,01 0.02
0.20 0.06 0.01 0.01
0.17 0.05 0.00 0.03
0.22 0.30 0.02 0.00
0.40 0.77 0.05 0.05
0.48 1.35 0.01 0.03
0.48 1.09 0.00 0.07
0.39 1.38 0.00 0.11
0.49 1.48 0.04
0.52 1.49 0.01
0.51 3.07 0.00 0.03
Air Sparging Pilot Study (AS-1)
Differential Pressure (inches water column)
-
0.01
0.01
0.02
0.01
0.01
0.05
0.02
0.03
0.04
0.07
0.03
0.03
30 60 90 120 150 180 210 240 270 300 330 360
Elapsed Time (min)
H:\ENG\2000\1001289\pilotstudydata.xls
MW-3 I VE-1
" "
-0.09
-0.13
-0.31
-0.16
-0.38
-0.52
-0.61
-0.50
-0.46
-0.71
-0.81
-0.66
-+-TW-2
-+-TW-3
MW-2
··*·VE-1
-MW-1
-+-TW-4
PILOT STUDY #2
Texaco Food Mart #2
Vapor Extraction Pilot Study (VE-1)
March 19, 2003
SVE BLOWER READINGS
Blower
Elapsed Vacuum Stack FID Wellhead Inlet
Time (min) (Inches of Readings Velocity Wellhead Velocity
water) (ppm) (ft/min) Flow (cfm) (ft/min)
0 0 0.00 0 0 0
30 35 14.01 1347 118 4567
60 35 36.08 1448 126 4545
90 35 20.98 3220 281 5490
120 35 22.02 1401 122 5862
150 45 25.47 2117 185 3184
180 45 24.26 2040 178 4442
210 45 28.89 2384 208 3769
240 45 1980 173 8825
270 55 28.82 2680 234 3475
300 55 42.05 2179 190 6999
330 55 47.00 1882 164 3593
360 55 97.82 2713 237 3968
Notes: ppm = parts per million
cfm = cubic feet per minute
Vapor Extraction PIiot Study (VE-1)
100.00 Stack FID Readings Vs. Time
80.00 "' C :a -60.00 • E • 0.
"' 0. 40.00 0-
ii: 20.00
0.00
0 30 60 90 120 150 180 210 240
Elapsed Time (min)
Vapor Extraction Pilot Study (VE-1}
Wellhead Flow Vs. Time 300
250
~ = 200
" -!B ~ 150
.c -i 100
50
0
0 30 60 90 120 150 180 210 240
Elapsed Time (min)
H:\Eng\2000\1001289\pilotstuay\pilols/udydata.x/s
Outlet
Inlet Flow Velocity Outlet Flow
(cfm) (ft/min) (cfm)
0
100 5914 129
99 5993 131
120 8710 190
128 7263 158
69 5301 116
97 5542 121
82 7192 157
192 5697 124
76 7006 153
196 5852 128
78 5448 119
87 5723 125
270 300 330 360
270 300 330 360
PILOT STUDY #3
Texaco Food Mart #2
Air Sparging/Soil Vapor Extraction Pilot Study (ASNE)
March 20, 2003
ELAPSED TIME TW-2 (MIN)
0 18.29
30 18.30
60 18.28
90 18.23
120 18.19
150 18.10
180 18.02
210 17.94
240 17.84
270 17.76
300 17.67
330 17.61
360 17.50
TW-3 TW-4 MW-1 MW-2
Depth to Water (feet)
19.43 18.42 18.41
18.64 18.49 18.40
18.65 18.49 18.39
18.54 18.48 18.36
18.23 18.49 18.33
17.80 18.48 18.28
17.50 18.47 18.22
17.26 18.45 18.18
16.94 18.42 18.11
16.78 18.36 18.06
16.45 18.37 17.98
16.19 17.35 17.95
15.86 18.32 17.88
ASNE Pilot Study
Depth to Water (feet) vs. Time
Elapsed Time (min)
19.43
18.30
18.10
17.74
16.75
15.82
15.26
14.90
14.34
14.06
13.10
12.41
11.98
MW-3
17.99
17.90
17.91
17.91
17.90
17.89
17.90
17.88
17.92
17.85
17.83
17.82
17.84
0 30 60 90 120 150 1B0 210 240 270 300 330 360
11.00
12.00
§: 13.00 ·
" f 14.00 -
;: 15 00 · 2 .
f 16.00
l 17.aa
18.00 ·
19.00
H:\ENG\2000\ 1001289\PIL OT STUD Y\pilotstudydata
VE-1 AS-1
18.27 16.95
--
--
--
--
--
--
--
--
--
--
--
--
------MW-3
--t,--TW-2
---¾-TW-3
-+-TW-4
-+-MW-1
-MW-2
PILOT STUDY #2
Texaco Food Mart #2
Vapor Extraction Pilot Study (VE-1)
March 19, 2003
ELAPSED lW-2 lW-3 lW-4
TIME(MIN)
MW-1 MW-2
Differential Pressure (inches water column)
0 -
30 0.14
60 0.10
90 0.09
120 0.00
150 0.02
180 0.21
210 0.25
240 0.11
270 0.09
300 0.04
330 0.10
360 0.13
---
0.08 0.Q1 0.01
0.40 0.00 0.12
0.40 0.03 0.01
0.10 0.00 0.04
0.03 0.03 0.05
0.01 0.Q1 0.13
0.04 0.00 0.05
0.03 0.01 0.08
0.03 0.02 0.00
0.03 0.Q1 0.06
0.06 0.04 0.01
0.04 0.00 0.01
Vapor Extraction Pilot Study (VE-1)
Differential Vacuum Pressure
(inches of water) vs. Time
Elapsed Time (min)
-
0.01
0.00
0.02
0.01
0.03
0.01
0.02
0.00
0,03
0.02
0.03
0.00
MW-3 AS-1
--
-0.04
-0.01
-0.03
-0.00
-0.04
-0.00
-0.04
-0.06
-0.03
-0.04
-0.37
-0.04
0 30 60 90 120 150 180 210 240 270 300 330 360
0.40
I!! ----TW-2
:, 'C' 0.30 .... .. -I!! ;
0. ~ 0.20 :m~ C _g I!! u 0.10 f:5.
------TW-3
-+-MW-1
---ll<--AS-1
-i,TW-4
--¼··· MW-2
Cl
0.00
H:IENG\2000\10012891PILOT STUDY\pilotstudydata_x/s
PILOT STUDY #3
Texaco Food Mart #2
ASNE Pilot Study
March 20, 2003
SVE BLOWER READINGS
Blower
Elapsed Vacuum Stack FID Wellhead
Time (min) (inches of Readings Velocity Wellhead
water) (ppm) (ft/min) Flow{cfm)
0 0 0 0 0
30 25 100 1300 113
60 25 110 1500 131
90 29 95 2000 175
120 32 125 1200 105
150 33 145 800 70
180 34 125 1900 166
210 34 130 1000 87
240 38 140 2300 201
270 38 130 1400 122
300 40 150 1500 131
330 40 140 1800 157
360 40 175 1800 157
Notes: ppm = parts per million
200
g, 150
:s --a: a 100 0: C. c-u: 50
0
cfm = cubic feet per minute
ASNE Pilot Study
Stack FID Readings vs. Time
Inlet Outlet
Velocity Velocity
(fl/min) (ft/min)
0 0
4950 6100
5400 6800
4800 7500
5130 6580
5319 5680
5600 7300
5300 6300
4850 7000
4800 6000
5300 6500
4100 6200
5800 6500
0 30 60 90 120 150 180 210 240 270 300 330 360
Elapsed Time (min)
ASNE PIiot Study
Wellhead Flow vs. Time
0 30 60 90 120 150 180 210 240 270 300 330 360
Elapsed Time {min)
H:\ENG\2000\1001289\PILOT STUDYlpilo/studydata.xls
PILOT STUDY #3
Texaco Food Mart #2
Air Sparging/Soil Vapor Extraction Pilot Study (ASNE)
March 20, 2003
ELAPSED TIME Sparge Pressure (psi) Sparge Flow (cfh) (MIN)
0 0 0
30 25 30
60 25 30
90 29 60
120 32 36
150 33 48
180 34 48
210 34 72
240 38 84
270 38 108
300 40 144
330 40 144
360 40 144
ASNE Pilot Study
Pressure (psi) and Flow (cfh} vs. Time
140
120
;s 100 .e ~ 80
"' 60 ~ < 40
20
0 30 60 90 120 150 180 210 240 270 300 330 360
Elapsed Time (min)
H:\ENG\2000\1001289\PILOT STUDY\pifotstudydata.xls
40
·;;
30 .!l,
f ~
20 i
0.
10 ~
0
[.--+-Sparge Flow (cfh)
1---sparge Pressure (psi)
PILOT STUDY #3
Texaco Food Mart #2
Air Sparging/Soil Vapor Extraction Pilot Study (ASNE)
March 20, 2003
ELAPSED TIME TW-2 (MIN)
0 18.29
30 18.30
60 18.28
90 18.23
120 18.19
150 18.10
180 18.02
210 17.94
240 17.84
270 17.76
300 17.67
330 17.61
360 17.50
TW-3 TW-4 MW-1 MW-2
Depth to Water (feet)
19.43 18.42 18.41
18.64 18.49 18.40
18.65 18.49 18.39
18.54 18.48 18.36
18.23 18.49 18.33
17.80 18.48 18.28
17.50 18.47 18.22
17.26 18.45 18.18
16.94 18.42 18.11
16.78 18.36 18.06
16.45 18.37 17.98
16.19 17.35 17.95
15.86 18.32 17.88
ASNE Pilot Study
Depth to Water (feet) vs. Time
Elapsed Time (min)
19.43
18.30
18.10
17.74
16.75
15.82
15.26
14.90
14.34
14.06
13.10
12.41
11.98
MW-3
17.99
17.90
17.91
17.91
17.90
17.89
17.90
17.88
17.92
17.85
17.83
17.82
17.84
0 30 60 90 120 150 180 210 240 270 300 330 360
11.00
12.00
§: 13.00
j 14.00
~ 15.00
fi. 16.00
,!! 17.00
18.00
19.00
H:\E.NG\2000\1001289\PILOT STUDI/V)i/otstudydata.xls
VE-1 AS-1
18.27 16.95
--
----
--
--
--
----
--
--
--
--
-a-MW-3
TW-2
··X-TW-3
-+-TW-4
-t-MW-1 j
-Mw-2·
PILOT STUDY #3
Texaco Food Mart #2
Air Sparging/Soil Vapor Extraction Pilot Study (ASNE)
March 20, 2003
ELAPSED TIME
--I
(MIN)
0
30
60
90
120
150
180
210
240
270
300
330
360
25.00
20.00
c, 1s.oo
E -0 10.00
C
5.00
0.00
TW-2
4.10
0.63
0.80
1.42
0.92
4.01
1.47
0.60
1.20
0.68
0.74
0.48
0.60
TW-3 TW-4 MW-1 MW-2
Dissolved O rvnen Im•
.
.
.
.
.
.
.
.
.
.
.
.
.
. 0.29
. 0.42
. 0.38 . 0.40
. 0.38 . 0.46 . 0.50 . 0.45 . 0.45 . 0.39
. 0.45 . 0.58 . 0.39
ASNE Pilot Study
Dissolved Oxygen (mg/L)
6.86
12.60
15.00
22.00
14.23
13.33
23.41
18.40
18.20
18.10
15.00
16.25
16.40
MW-3
LI
0.68
1.92
0.73
1.60
1.86
1.72
1.40
0.54
0.48
0.46
0.30
0.86
0.40
0 30 60 90 120 150 180 210 240 270 300 330 360
Elapsed Time (min)
H: lENG\2000\ 1001289\PJL OT STUD Y\pilotstudydata.xls
VE-1 AS-1
1.16 12.60
. .
. .
. .
. .
. .
. .
. .
. .
. .
. .
. .
1.14 .
-+-TW-2
--·MW-1
I -'lie-MW-2 I
~
i
PILOT STUDY #3
Texaco Food Mart #2
Air Sparging/Soil Vapor Extraction Pilot Study (ASNE)
March 20, 2003
ELAPSED TIME
(MIN)
0
30
60
90
120
150
180
210
240
270
300
330
360
25.0
20.0 -
C 15.0
"' 10.0 · 0
5.0 -
0.0
TW-2 TW-3 TW-4 MW-1 MW-2 MW-3
Oxygen Content{%)
0.1 0.3 3.1 1.2
0.0 21.2 17.8 18.6 -
19.6 21.0 18.2 -
19.1 21.3 21.1 18.4 19.0 -
18.6 21.2 0.2 20.4 20.1 -
18.6 20.5 21.2 19.5 16.6 -
14.4 19.0 20.4 19.0 14.2
9.5 17.3 20.7 20.5 14.3 -
11.9 15.6 21.3 19.2 16.8 -
16.3 20.6 20.2 20.4 16.1 -
4.7 12.7 20.0 19.2 16.2 -
4.6 3.5 20.9 20.1 17.7 -
4.7 13.9 20.5 19.5 17.1 -
-~·----
ASNE Pilot Study
Oxygen Content {%)
2 3 4 5 6 7 8 9 10 11 12 13
Elapsed Time {min)
H:\ENG\2000\1001289\PILOT STUDY\pilotstudydata
VE-1
0.3
-
-
-
-
-
-
-
-
-
-
-
-
--
/--+-iw-2
, --111--TW-3 : '---il-TW-4
1
--MW-1
-¼--MW-2
AS-1
0.0
-
-
-
-
-
-
-
-
-
-
-
-
PILOT STUDY #3
Texaco Food Mart #2
Air Sparging/Soil Vapor Extraction Pilot Study (ASNE)
March 20, 2003
ELAPSED TIME
(MIN)
0
30
60
90
120
150
180
210
240
270
300
330
360
1: ~ 0 0 .. ..,_
80.0
60.0
·s ~ 40.o c 5 20.0
-e ~ 0.0
TW-2
21.0
21.3
0.9
1.4
1.4
1.5
4.3
4.7
7.7
2.1
10.8
10.7
10.8
TW-3 TW-4 MW-1 MW-2 MW-3
Carbon Dioxide Content (%)
18.7 0.3 17.2
21.3 0.1 2.8
21.3 0.2 2.5
0.0 0.1 2.4
0.1 0.0 0.4
0.6 0.0 1.5
2.3 0.9 1.7
4.5 0.5 0.4
7.6 0.1 1.6
0.2 1.3 0.5
10.5 0.6 1.3
10.3 0.4 0.6
9.9 0.5 1.2
ASNE Pilot Study
Carbon Dioxide Content (%)
52.6 -
0.0 -
82.8 -
0.0 -
13.3 -
6.0 -
8.7 -
8.6 -
0.0 -
0.0 -
0.0 -
5.0 -
0.0 -
0 30 60 90 120 150 180 210 240 270 300 330 360
Elapsed Time (min)
H:\ENG\2000\ 1001289 \P/L OT STUD Ylpifotstudydata.x/s
VE-1 AS-1
20.7
-
-
-
-
-
-
-
-
-
-
-
-
--+-TW-2 I
--TW-3;
TW-4 i
·-r-MW-1 !
--llE-MW-2j
21.1
-
-
-
-
-
-
-
-
-
-
-
-
'
j
_J
PILOT STUDY #3
Texaco Food Mart #2
Air Sparging/Soil Vapor Extraction Pilot Study (ASNE)
March 20 2003
ELAPSED TIME TW-2 TW-3 TW4 MW-1 MW-2 MW-3 VE-1 (MIN)
0
30
60
90
120
150
180
210
240
270
300
330
360
-100.0 C: " -80.0 C: 0 0
~ 60.0 o-
Q.~ .. -> 40.0
" "i: 20.0 .. "' ~ 0 0.0
0.0
0.2
0.1
0.2
0.4
0.4
0.8
1.5
2.0
0.7
2.0
1.3
1.1
Or anic Va or Content
0.1 0.1 0.0
0.0 0.1 0.1
0.0 0.1 0.0
0.0 0.0 0.1
0.0 0.1 0.4
0.7 0.0 0.1
8.1 0.7 0.3
15.1 0.8 0.6
35.0 0.2 0.5
0.4 1.0 0.5
54.8 0.7 0.4
46.9 0.4 0.5
41.7 0.5 0.3
ASNE Pilot Study
Organic Vapor Content(%)
99.9
99.9
88.6
84.8
33.4
99.9
99.9
99.9
99.9
99.9
99.9
86.8
90.6
%
0 30 60 90 120 150 180 210 240 270 300 330 360
Elapsed Time (min)
0.3
--+-TW-2
----TW-3
TW-4
·~->i--MW-1
-+-MW-21
AS-1
1.0
~------~~---------------------------~
H:\ENG\2000\ 1001289\PfL OT STUD Y\pilotstudydata.xls
PILOT STUDY #3
Texaco Food Mart #2
Air Sparging/Soil Vapor Extraction Pilot Study (ASNE)
March 20, 2003
ELAPSED TIME
(MIN) TW-2 TW-3 TW-4 MW-1 MW-2 MW-3 VE-1
0
30
60
90
120
150
180
210
240
270
300
330
360
!! c 3.50
:::, E :a .2 2.50 !! 8 a. ~ -s 1.50 ii
!! :a 0.50 ~ .c ·-" cg
-0.50
Differential Pressure inches water column)
-----
0.00 -0.30 0.00 -0.04 0.00
0.00 -0.20 0.02 -0.20 0.00
0.10 0.05 0.40 0.02 0.10
0.08 0.30 0.01 -0.10 0.26
0.16 0.20 0.00 0.12 0.55
0.18 0.28 -0.02 0.03 0.30
0.20 1.03 0.09 0.11 0.46
0.33 0.98 0.10 0.15 -0.50
0.35 1.72 0.08 0.40 0.50
0.75 3.10 0.11 -0.09 0.41
0.70 3.25 0.10 0.30 0.60
0.75 3.51 0.10 0.05 0.40
ASNE Pilot Study
Differential Pressure (inches water column)
0 30 60 90 120 150 180 210 240 270 300 330
Elapsed Time (min)
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
--
-
-
-
-
-
-
-
-+-TW-2
-----TW-3
TW-4
····!<-· MW-1
l-llf-MW-2
H:\ENG\2000\ 1 DO 1289\PIL OT STUD Y\pilotstudydata.xls
AS-1
-
-
--.
-.
-.
-
-.
-
MW·4
ASPHALT
VACANT LOT
r--------, I REGULAR I
I UST I L--------J r--------, I REG~R I PITI us I L ________ J
H
' I.:···
f" suirrE i L..---------..J ,-----------, I su&~~E I L..---------..J
f
f
f
I
TEXACCD FOOD MART
\
\ ' '
KEROSENE UST
i
ASPHALT I
--·-·-·----------------·---·-·-----·--ovE'RHEAD Ei.ECTRIC --------
LEGEND:
,:,
J2/
LIGHT POLE
POWER POLE
ELECTRICAL LINE
SANITARY SEWER LINE
-PRODUCT LINE
TEXACO FOOD MART MONITORING WELL
TEXACO FOOD MART DEEP MONITORING WELL
AMOCO RUSHCO #3 MONITORING WELL ALL DATA TAKEN FROM THE PHASE II LIMITED SITE ASSESSMENT REPORT PREPARED BV COM ENV!ROMENTAL SERVICES, INC. DATED 4/16/01.
GEOPRODE LOCATION
VAPOR EXTRACTION RADIUS OF INFLUENCE (15 FEET)
AIR SPARGING RADIUS OF INFLUENCE (20 FEET)
NOTE: ALL LOCATIONS ARE APPROXIMATE.
ACCESS ROAD
WENDY'S PROPERTY
PARKING AREA
Texaco Food Mart #2
Remediation System Cost Estimate
Installation of monitor wells
4 Al wells (45 feet each) & 1 AI well@ 85 feet 265 feet $45.00 $11,925.00
6 VE wells (20 feet each) 120 feet $55.00 $6,600.00
Supervision, miscellaneous 1 I lump sum $3,200.00 $3,200.00
System Installation
375 I Linear feet $30.00 $11,250.00
1 lump sum $7,500.00 $7,500.00
1 lump sum $8,500.00 $8,500.00
Concrete (15 cu. yds) 15 cubic yards $120.00 $1,800.00
Asphalt 1100 square feet $2.50 $2,750.00
Enclosure (Building / fence) 1 lump sum $7,500.00 $7,500.00
Air Compressor 1 lump sum $8,000.00 $8,000.00
SVE Blower 1 lump sum $10,000.00 $10,000.00
Controls, gauges, fittings 1 lump sum $ 6,000.00 $6,000.00
Labor 1 lump sum $25,000.00 $25,000.00
Total Cost $110,025.00
h: engineering\ 199711970067\cap\costestimate.xls
BASIS OF DESIGN
This section details the Basis of Design for the infrastructure components and key system
equipment required for installation of this treatment system.
1.0 Infrastructure
This section includes the basis of design for key infrastructure components including the treatment
system building, process piping trenches, air sparging and vapor extraction wells and trenches.
Each of these components are shown in the Figures.
1.1 Treatment System Building
The treatment system building is designed to provide enclosure for the treatment system
equipment. The building will be fully insulated to prevent freezing of system
components. The contractor will coordinate with the local county building inspector to
construct the building. Shield will provide on-site supervision to ensure that the
building is constructed to meet the treatment system requirements.
1.2 Process Piping Trenches
The depth and width of the process trenches will be no less than eighteen inches deep
by no more than thirty-six (36) inches wide. This will ensure that all conduit (vapor and
air lines) are set deeper than the predicted frost zone of fourteen inches.
1.3 Air Sparging and Vapor Extraction Wells
Shield will utilize seven (7) wells at the Texaco Food Mart #2 project site for vapor
extraction and six (6) wells for air sparging activities. Two existing wells, one air
sparge and one vapor extraction, are included in this number of remedial wells. The
location of the existing and proposed remediation wells are shown in Figure 18. It
should be noted that utilization of existing wells represents a cost saving to the State
Trust Fund.
2.0 System Equipment
This section provides a description of the system equipment, the expected technical and
performance goals, and basis for each component.
2.1 Process Piping and Tubing
Component Description
There are two types of process piping and/or tubing which will be utilized for the RAS
treatment system: air supply line/ conduit to the air sparging wells and PVC pipe for
the vapor extraction wells. The size of the air hose has been determined based on flow
calculations provided herein.
The air supply hose will be a 1/2 inch reinforced, multipurpose, flexible hose rated for
200 psi of air pressure. The hose shall be encased in 2-inch diameter PVC piping.
Vapor extraction piping to the wells will be six (6) inch diameter PVC piping. The size
of the hose and piping has been based on flow calculations provided herein.
Technical and Performance Goals
The process piping and air hose assemblies must meet the following criteria:
• Material compatibility with petroleum hydrocarbon constituents
• Adequate flow capacity to minimize head losses within the system
• Minimum burst safety factor of 3.0 based on supply pressure for air piping
• Cost and local availability
• Lowest cost based on Trust Fund guidelines
2.2 Air SystemNapor Extraction Mechanical Control Panel
Component Description
The panels will contain the control devices for vacuum pressures and flow from the
vapor extraction wells as well as controls for the air pressure and flow to the air sparge
wells.
Technical and Performance Goals
The control panel components must meet the following technical and performance
goals:
• The panel itself shall be constructed of a durable, lightweight material of
sufficient strength to hold the control devices, preferably aluminum or
schedule 80 PVC;
• Each air sparging line will have the following control devices: pressure
regulator, pressure gauge, adjustable flow meter
• Each vapor extraction line will have the following control devices: ball
valve, differential pressure (vacuum) gauge (in negative inches of water).
2.3 Electric Control Panel
Component Description
The electric control panel will contain the necessary electrical contacts to monitor
system components and alarm sensors. A SCADA remote telemetry system wiUbe
utilized along with PLC logic for on-site and remote control and monitoring of the
system.
Technical and Performance Goals
The control panel shall meet the following technical and performance goals:
1. The panel housing shall be NEMA 4 or higher rating
2. The panel will contain an adequate number of electrical connectors to control
all system controls, solenoid switches and alarm sensors
2.4 Air Compressor
Component Description
2.5
2.6
The compressor for the Texaco Food Mart #2 project site will be a compressor capable
of continuous operation. The compressor will be used for air sparging. The lubricant
for the compressor shall be a food type grade, synthetic lubricant to eliminate the
potential for injection of contaminated air into the soil matrix. The compressor will
come with all required accessories including the magnetic starter and particulate filters.
Technical and Performance Goals
The compressor must meet the following technical and performance goals:
I. Rotary screw type compressor for continuous operation
2. Capable of providing air supply 35 cfm @ I 00 psi
· 3. Lowest cost based on Trust Fund guidelines
Solenoid Switches and Liquid Level Floats
Component Description
The solenoid switches shall be explosion proof normally closed switches to provide
positive control of process flow for the air supply. The liquid level floats shall be
mercury filled, intrinsically safe float switches.
Soil Vapor Extractor Blower
Component Description
The blower for the Texaco Food Mart #2 project site will be a regenerative type blower
capable of continuous operation. The blower will be used for soil vapor extraction. The
blower will come with all required accessories including the moisture separator, filter,
vacuum gauges, relief valve, sampling ports, and muffler on the ambient air inlet.
Technical and Performance Goals
The blower must meet the following technical and performance goals:
I. Regenerative type blower for continuous operation
2. Capable of providing vacuum supply 600 cfm and 12 inches of Hg
3. Explosion proof
4. Lowest cost based on Trust Fund guidelines
SUMMARY OF COMPUTATIONS
I. Head Loss Calculation: Air System
Hose Diameter
Conduit Diameter
Length of Longest Piping Run
Estimated Head Loss
II Head Loss Calculation: SVE System
Piping Diameter
1/2 inch I.D.
2 inch
250 feet
23.96 psi
Length of Longest Equivalent Piping Run
Estimated Head Loss
6 inch
260 feet
0.62 psi
Client:
Project:
Subject:
Assumptions:
Holding Brothers, Inc
Texaco Food Mart #2
VE Basis of Design
By,
Checked,
AAD Date:
KAA Date:
Sheet Number 1 of 1
Project Number: 1001289
Task Number:
Seven (7) SVE wells to a depth of 20 feet each
N flow of 50 cfm per well
4/17/2003
4/18/2003
A typical Gast RS SVE blower was used in the pilot study activities. The blower is
assumed to be running at 55" max vacuum. The blower curve for a 60 Hz motor in
vacuum shows the blower running at 45 cfm
Gauge pressure is 3 psi
Head Loss Calculations
•~ Note that numbers & formulas were obtained from the Fluid Power Data Book {p22-23)
Information for calculations -VE wells:
Calculations:
260 feet Longest piping run
6" dia. pipe@ 350 cfm 0.1 pipe loss (actually negligable, 0.1 used as
conservative estimate)
Loss from fittings
Ball valve
Elbows
1
7
@
@
Total
34
12
Total Equivalent Piping run: 378 feet
)4
84
118
* no value provided in Fluid Data Power Book, value was estimated
Restriction for a RMS 400 moisture separator@ 400 cfm is 11 inches of H 20
1" H20 = 0.0361 psi
11" H,O = 0.3971 psi
Pipe Loss
_ _:G::::au:,g,:e"P:.r:.;e::s:.su::;r:.:ec..+.:.._1:.4:.:·:.5_ * pipe length
14.5
1000
7 VE wells@ 0.031 psi = 0.22 psi
0.4 psi (moisture separator requirement) + 0.22 psi
pressure loss
0.031 psi
0.62 psi
Requirements for SVE Blower
7 wells @ 50 cfm each 350 cfm
0.62 psi or 17.15 inches of water
Selection of SVE Blower
The SVE blower selected is the Gast R7 series or equivalent capable of 110" of water
vacuum and 420 cfm open flow. The blower is sized for the long piping run and greater
than the minimum wellhead flow of 50 cfm
Client:
Project:
Subject:
Holding Brothers, Inc.
Texaco Food Mart #2
AS Basis of Design
By:
Checked:
Sheet Number: 1 of 1
Project#: 1001289
Task Number:
AAD Date:
Date:
Air Compressor Basis of Design:
Assumptions: Five (5) Air Sparging Wells @ a depth of 45 feet each
One air sparge well will be at a depth of 85 feet.
Average static water level is estimated to be 20 feet below grade.
Each well will be installed to a depth of 45 feet with 2.5 feet of screen.
Water to displace: 65 feet
1 psi will displace 2.3 feet of water
65 I 2.3 28.3 psi
Radius of Influence: 15 feet
Head-Loss Calculations:
'' Note that numbers & formulas were obtained from the Fluid Power Data Book (p22-23)
Information for Calculations:
Longest piping run: 250 feet
1/2" diameter hose@ 20 cfm / 50 psi =
Loss from fittings:
Ball valve 1 @
Elbows O @
Total Equivalent Piping run:
Total
255 feet
255/25= 10.2 times 1.8 per 25 ft =
1 wells@ 18.34 psi each
Requirements for Compressor
Compatiblilty with 1/2" diameter hose
28.3 psi + 18.34 psi 46.60 psi
High cfm
Selection of Compressor
10 HP Gardner Denver rotary screw or equivalent
Capable of 100 psi and 35 cfm flow
1.8 psi loss per 25 feet
4.7
4.7
18.34 psi
18.34 psi
4.7
0
4.7
########
Air Flow Loss Through Pipes Instructions
Table of Factors -See Instructions For Use on Opposite Pilge .
For Estimating Air Flow Loss Through Pipes
i . . . '·._ .
PIPE SIZE -NPT To estimate the air pressure to~s through a pipe, find the f8etor from the chart on opposite ~aJe-according to the pipe size and,_SCFM. Oowd · SCFM 1/2 3/4 1 1V, 1V, 11,. 2 21/2 Take the factor and d vi e it by! the ratio of compresslon-.(caleulate
12.7 1,2 ,5 in absolute pressure values), Compression ratio wlll be \Cauge .pressure + 5 14.51 .;. 14,5 PSI. Then multiply this number by at:tual ength ofplpe,ln 10 50.7 7.8 2.2 ,5 feet, then divide by 1000. This will give pressure.loss m PSI. 15 114 17.6 4.H 1,1
20 202 30.4· 8,7 2,0
25 316 f>O.O 13.6 3.2 1.4 ,7
30 456 70,4 19.6 4.5 2,0 1,1 Pressure Loss Through Fittings 35 621 95.9 26.6 6.2 2.7 1,4
40 811 125 34.8 8,1 3.6 1 ·" M, 159 44,0 10.2 4.r, 2,4 1.2 ! 50 196 54.4 12.G f>.li 2.!l 1.r, Figures in the body of this chltrt. are air pressure now losses through ' ,;o 28?-7R.3 1 K.2 8.0 4.2 2 ,, .~crf'w fil.t.in~s expressed in equivalent lengths of straight cipe of the same 70 :185 JOG 24.7 10.!J 5.7 2.!I I.I diameter. For example on a 1" Rate valve, the flow res stance would be 80 50,1 l:l!J 32.:1 14.il 7 _!") :1.H I 5 the same as 0.57 foot of straight. 1" Pipe. 90 646 17{j 40.9 PU !)Ji -1.H l.H
Medium St~ndard Angle 100 785 217 50,5 22.3 11,7 G.0 2.:J Pipe Gate Long Close Tee Globe 950 263 61.1 27 .o 14.1 7,2 2,R Size Valve Radius Radius En·or *** Valve Return Thru Valve 110 NPT Ell or * Ell or •• Bend Side 120 318 72.7 32.2 16.8 8,6 3.3 130 369 85.3 37.8 19.7 10.1 3.9 1/2 0.31 0.41 0.52 0.84 1.1 1.3 1.7 2,5 140 426 98,9 43.8 22.9 11.7 1.4 3/4 0.44 0.57 0.73 1.2· 1.6 1,8 2,3 3,6 150 490 113 50.3 26,3 , 13.4 5,2 1 0.57 0.77 0.98 1.6" 2,1 2,3 3,1 4.7 160 570 129 57,2 29.9 15.3 5.9 1¼ 0,82 1.1 1.4 2.2· 2,9 3,3 4,4 6,6 1½ 0.98 1.3 1.6 2,6 3.5 3,9 5,2 7,8 170 628 146 64.6 33,7 17 .6 6.7 2 1.3 L7 2,2 :-:: 4,8 5,3 7.1 10.6 ]RO 705 163 72.6 37.9 19.4 7 .5 2½ 1,6 2,2 2,8 5,9 6.6 8,7 13.1 190 785 177 80.7 42.2 21,5 8,4 3 2,1 2,8 3.6 5.7, 7.7 8,5 11.4 17.1 200 870 202 89.4 46.7 23.9 9,3 4 3,0 3,9 5,0 7.9· 10.7 11.8 15.8 23.7 220 244 108 56,5 28,9 11.3 5 3,9 5,1 6,5 IO.fl 13.9 15.5 20.7 31 240 291 128 67.3 34.4 13,4 *Or on run of standard tee. 260 341 151 79.0 40.3 15,7 **Or on run of tee reduced in size 25%. 280 395 175 91.6 46,8 18.2 ***Or on run of standard tee reduced in size 50%. 300 454 201 105 53.7 20.!J
LARGER PIPE SIZES -NPT Friction of Air in Hose SCFM 2 2'h 3 3 31/2 4 4!/2 5
320 61.1 23.8 7,5 3.5 Pressure drop per 25 feet. In Proportion for longer or shorter Iengtl1s. 340 69.0 26.8 8,4 3.9 2,0 360 77 .3 30.1 9.5 4.4 2,2 Sii:e SCFM SO PSI 60 PSI 70 PSI 80 PSI 90 PSI 100 PSI 110 PSI 380 86.1 33.5 10.5 4,9 2.5 -·➔ 1/2 l.D. 20 1,8 1,3 1.0 0,9 0,8 0,7 0,6 400 94,7 37.1 11,7 5,4 2.7 .,o 5.0 4,0 3.4 2,8 2.4 2,3 2.0 420 105 40.9 12,9 6,0 .1.1 40 10.l 8.4 7,0 6.0 5.4 4,8 4,3 440 1'6 44.9 14.1 6,6 3,4 50 18,1 14.8 12.4 10,8 9,5 8,4 7,6 460 126 48,8 15.4 7 .1 3,7 2,0 60 23,4 20,0 17,4 14.8 13.3 }tg 480 138 53.4 16.8 7,8 4,0 2.2 70 28.4 25.2 22.0 19.3 500 150 58.0 18.3 8,5 4.3 2.4 80 34,6 30,5 27,2 24,6 525 165 64.2 20.2 9.4 4,8 2.G ;J/4 I.D. 20 0.4 0,3 0,2 0,2 0,2 0,2 0.1 550 182 70.2 22.1 10.2 5,2 2.9 30 0,8 0,6 0,5 0.5 0.4 0,4 0.3 575 197 76.7 24.2 11.2 5.7 3.1 40 1.5 1.2 0.9 O,R 0,7 0.6 0,5 GOO 215 83.5 26.3 12.2 G.2 ::1.4 50 2,4 1,9 1.5 1.3 1,1 1.0 0,9 625 233 92.7 28.5 L3.2 ti.8 :-l,7 60 3,5 2,8 2,3 1.9 1.6 1.4 1.3 70 t~ 3,8 3.2 2,8 2,3 2,0 1.8 G!,O 2r,3 98,0 30.ll 14.:J 7 .:1 ,1.0 2.2 80 5.2 4.2 3.6 3.1 2,7 2,4 fi75 272 106 :1:1.:1 I r,.4 1 .n 4.:t 2.4 !IO 8,5 6,8 r,.5 4.7 4,0 3.5 3.1 700 2!14 I 14 :15.R IC..li R.f> •l.!j :.u; JOO 11.4 8.6 7,0 5,8 5,0 4,4 3.9 750 a:n 131 41.1 19.0 !l.7 5.:J 2,9 110 14.2 11.2 8,.8 7 .2 6,2 5.4 4,9 800 382 148 46.7 21.7 11.1 G.l ;1_3 1" 1.0. 30 0,2 0,2 0,1 0,1 0,1 0,1 0,1 850 433 168 52.R 24.4 12.5 6.8 :l.8 40 0.3 0.3 0,2 0,2 0.2 0,2 0,2 900 486 188 59.1 27.4 14,0 7.7 4.2 50 0,5 0.4 0.4 0,3 0,3 0,2 0,2 950 541 209 65.9 30,5 15,7 8,6 4.7 60 0,8 0.6 0,5 0,5 0.4 0,4 0,3 1,000 600 232 73.0 33,8 17,3 9,5 5,2 Ul 70 i:! 0,8 0.7 0,7 0,6 0,5 0,4 1,050 658 256 80.5 37.3 19.1 10.4 5,8 2. l 80 1.2 1.0 0,8 0,7 0.6 0,5 1,100 723 281 88.6 40.9 21.0 11.5 6.3 ~.4 90 2.0 1.0 1,3 1,1 0,9 0,8 0,7 1,150 790 307 96.6 44.7 22.9 12.5 6.9 :!.6 100 2,6 2,0 1,6 1.4 1.2 1.0 0,9 1,200 850 344 105 48,8 25.0 lJ,7 1.5 2,8 110 3,5 2,6 2,0 1.7 1.4 L2 1,1 1,300 392 123.4 57.2 29.3 16.0 R,8 3.:-J 1,400 66.3 J3.9 18.6 10.2 3,8 Vala on tfiese two pages were adapted from the Trade Standards cidopted
by the Compressed Air Institute -22--23-
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TEXACO FOOD MART DEEP MONITORING WELL
AMOCO RUSHCO #J MONITORING WELL ALL DATA TAKEN FROM TliE PHASE II LIMITED SITE ASSESSMENT
~_i~~~fff!o~~ED BY CBM ENVIRCl'I\ENTALSERVICES, INC.
♦ VE VAPOR EXTRACTION WELL
AIR SPARGING WELL
MICROGRAMS PER LITER
NAPHTHALENE CONCENTRATION (ug/LJ
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♦ AS
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[J.1] NAPHTHALENE CONCENTRATION NOT USED IN CONTOURING (ug/L)
---NAPHTllALENE ISOCONCENTRATION LINE (ug/L)
BDL BELOW LABORATORY METHOD DffiCTION LIMITS
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• S'HI"ELD 4301TAGGARTCREEKROAD
CHARLOTTE, NC 28208
704-394-6913
704-394.;986/ax ENG/NEER/NG, /NC. www.1hle!der,glnoe1ing.com
NAPHTHALENE
ISOCONCENTRATION MAP
TEXACO FOOD MART #2
·c: APPROXIMATE GRAPHIC SCALE
™ 0
" 30 DATE •• 10/07/03 DRAWN BY •• DE "&-, NOTES: 1· GROUNDWATER SAMPLES COLLECTED ON 04/30/03.
&j 2-AU LOCATIONS ARE APPROXIMATE.
1700 COTTON GROVE ROAD
LEXINGTON, NORTH CAROLINA SHIELD# 1001289
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704-394-6968 rax ENG/NEERING, /NC www.•hlekw\gl11H1fngcom
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1700 COTTON GROVE ROAD
? LEXINGTON, NORTH CAROLINA I DATE: 10/07/;~ELDNO.l;~~NBY: DE
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• THE LOCATION AND SIZE OF THE EQUIPMENT
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AS-BUil T SYSTEM
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A
ITEM EQUIPMENT
X COALESCING Fil TER
w SOUND REDUCTION FOAM
u FAN SWITCH
T LIGHT SWITCH
s A!R FLOW METER
Q FLOOR VENT (TYP. FOR 4)
p NOISE• REDUCING DISCHARGE MUFFLER (TYP. FOR 2)
" LIGHT
M VENTILATION FAN
L M\lllENT AIR INTAKE VALVE
K SVE AIR FILTER
J SVE MOISTURE SEPARATOR
I MOISTURE SEPARATOR PRESSURE RELIEF VALVE
H VACUUM BLOWER
G COMPRESSED AIR FLOW MITERS
F PRESSURE REGULATORS WITH GAUGES
E COMPRESSED AIR FILTER/CONDENSATE TRAP
D AIR SOLENOID VAL VE (TYP. FOR 8)
C AIR COMPRESSOR
' CONTROL PANEL WITH COVER
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CHARLOTTE, NC 28208
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DATE:
SCALE:
TREATMENT SYSTEM
P &. ID
TEXACO FOOD MART #2
1700 COTTON GROVE ROAD
LEXINGTON, NORTH CAROLINA
SHIELD NO. 1001289
10/07/03 DRAWN BY: DE
AS SHOWN FIGURE: 17
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• VE PROPOSED VAPOR EXTRACTION WELL
• AS PROPOSED AIR SPARGING WEU.
NOT£: All LOCATIONS ARE APPROXIMAlE •
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GASOLINE/
DISPENSER~
REMEDIATION SYSTEM TRENCHING
I
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r-------------,
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'--------------..J
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I UST I '----------------..J
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ASPHALT
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TEXACO
FOOD MART VE-1 ~ VE @MW-2 1:i
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ly VF-Qf,111111/~ I I
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ACCESS ROAD ~ S!Jlfi!:.P 4301 TAGGA,RT Of!EEK ROAD
CttARUITTE. NC :!8208
104494<!913 -·----~--
REMEDIATION SYSTEM LAYOUT MAP
APPROXIMATE GRAPHIC SCALE
0 10 29
SCALE: 1 in. = 20 ft.
TEXACO FOOD MART #2
1700 COTTON GROVE ROAD LEXIMGTON, NORTH CAROLINA
SHIELD # 1001289
DATE: 10/07/03 DRAWN BY: DE
SCALE : AS SHOWN FIGURE: 18
~
~
I ~
i ~
MIN. 6"¢ BOREHOLE ---0-I
BENTONITE PLUG
MINIMUM 2' -0" THICK
2" SCHEDULE 40 PVC
0.010 SLOT WELL SCREEN
WELL VAULT
WITH CONNECTION
-..-----CEMENT GROUT
z
:::e
0
I
0 N
"' N
SEASONAL LOW
GROUNDWATER TABLE
1 '-0" MIN.
NO. 2 GRADED
FILTER SAND
• SH1E'.LD "°' TAGOARTCR,eKRQAD
CHARLOTTE, NC. 28208
704-394-6913
704-394-e968 ra. ENG/NEERJNG, /NC, www.•h1el<1e11ginuenrqcom
TYPICAL AS WELL
DETAIL
TEXACO FOOD MART #2
1700 COTTON GROVE ROAO
LEXINGTON, NORTH CAROLINA
SHIELD NO. 1001289 I DATE: 10/07/03 DRAWN BY: DE
~ SCALE: AS SHOWN FIGURE: 19 e L,.,.. _____________ ....,_,_,,_,...;...~~;,_,,...1,,,;.,,;,..;;;~-...;.; ...... .....1
CFM/HP
4,6 ~------------~
porHP
4,4
pMHP
4.2
porHP
4.0 per HP
3,8
po,HP
lntegra Operating Efficiencies-
2000
Compelllive
Operating Efficiencies .•.
3000
RPM
4000 5000
The patented, Integrated advantage is a technological advance in compressor design that drastically
reduces the number of traditional connections and fittings to ensure maximum reliability and uptime.
A 25-40% reduction in connections comes from combining the lubricant sump, air /lubricant separation
system, mixing valve and airend into an integrated component unmatched in the industry. Integrated
means you can have a small footprint and serviceability. Best of all, the airend is bolted to the sump ·
for cost effective replacement years down the road. Integrated means unparalleled.
Three Stage Air
/ Oil Separation
• Mechanical
redirection
• Cyclone:
Centrifugal-type
air direction
• Pleated filter;
Inside-out final
separation
• The result, Les.s •
than 2PPM carry
over measured
before the after-
cooler -lowest in
the industry
Maintenance-Free,
Leak-Proof operation•
• 0-ring ensures superior
seal
Compact, Integrated design
• Allows for one of the smallest
footprints in the industry while
maintaining serviceability
Energy-Saving Efficient
Rotor Profile
• Lower annual electricity
costs -the largest expense
associated with compressor
operation
Reliable, Consistent
Operation Via New
Generation Bearings
• Capable of 3 times more
load carrying capacity than
conventional designs
Integrated, 3-Way
Thermal Mixing Valve
• Minimizes leak points via
integrated design
• Ensures maximum lubri-
cant life by prevention of
moisture contaminants
I
%"' I Ill! ...
STANDARD EQUIPMENT
• Integrated, Single-Stage Rotary Screw Air
Compressor With On Line/Off Line Control
• 3 Phase, 60 Hertz, 1 .15 Service Factor, EPAct
Energy Efficient. Open-Drip-Proof Drive Motor
• OSHA Approved Belt Guard
Heavy Duty Radiator Type Air /Oil Aftercooler
Moisture Separator and Trap
Easy-Access Air /Oil Separator Element
1 O Micron Full-Flow Oil Filter
• Oil Level Sight Gauge
Factory Fill AEON™ 4000 Rotary Screw
Lubricant
Heavy Duty, Replaceable Element Inlet Air Filter
• Thermal Mixing Valve for Oil Temperature Control
• Corrosion Resistant Control Line Tubing
• Air /Oil Reservoir Pressure Relief Valve
• Minimum Discharge Pressure/Check Valve
• Automatic Blowdown Muffler
• UL Listed and CSA Recognized Electrical
Components and Wiring
NEMA 3R Electrical Control Enclosure Including:
-Mounted/Wired Full-Voltage Magnetic Motor
Starter
-Hourmeter
-On/Off Selector Switch
• Choice of Package Voltage (Choose from 200,
230, 460 or 5 7 5 Volts)
• Quiet Sound Enclosure
AUTO SENTRY T CONTROLLER
Load/No load with timed stop operation
• Lead/Lag Control (manual)
• Manual or Automatic Restart following power
failure
• CSA labeled and approved electrical controls and
wiring
• Emergency Stop button
• Analog hourmeter
• Advisories for high discharge temperature, high
reservoir temperature, failed discharge
thermistor, failed reservoir thermistor, power
failure, high control voltage, low ambient
(system, discharge) temperature.
Gardner
Denver
©2002 Gardner Denver, Inc.
http://www.gardnerdenver.com [e-mail]
13-15-230 1st Ed. 2/02 Litho in U.S.A.
OPTIONAL EQUIPMENT
• NEMA 4 Control Enclosure
• AEON™ 9000SP Rotary Screw Lubricant
• AEON™ 6000FG Rotary Screw Lubricant
• TEFC Drive Motor
• ODP or TEFC Premium Efficiency Drive Motor
with 5-Year Warranty
PERFORMANCE 60 HZ, 7.5-15 HP
100
7.5 INT-7.5 EFB 125
150
175
100
10 INT-10 EFB 125
150
175
100
15 INT-15 EFB 125
150
175
DIMENSIONS/WEIGHTS
7.5 ;n
mm
10 ;n
mm
15 ;n
mm
Approximate
Drrncn:;1ons (2) • 39 26
991 660
39 26
991 660
39 26
991 660
58.5
1486
58.5
1486
58.5
1486
6.9 32 0.91
B.6 27 0.76
10.3 23 0,65
12.1 20 0.57
6.9 42 1.19
B.6 37 1.05
10.3 30 0.85
12.1 27 0.76
6.9 61 1.73
8.6 54 1.53
10.3 45 1.27
1 2.1 40 1.13
Approximate
ShIppIng Weight (3)
lb 790 72
kg 358
lb 810 74.5
kg 367
lb 830 74.5
kg 376
1. Full package performance with ICFM (m'/min) measured at the terminal discharge of
the package in accordance with CAGI/PNEUROP acceptance test code PN2CPTC2.
2. Dimensions shown are nominal for all enclosed models.
3, Weights shown are for air cooled models less shipping skid.
50
HIGH PRESSURE MODELS
24 76 ' ,r· ,,.·,
I
µJJ
.
l l
I I
--
I I
l l
' ~
----I -
f--.12.11 I 8.50 J 4x_ 56 thru
:::rr,: .:..'.; ;11:·1.rn LC
2526
ll.'
R7HSERIES
MODEL R7H3100A
MAX. PRESSURE -284" H,O (60 Hz), 277" H,O (50 Hz)
MAX. VACUUM -183" H,O (60 Hz), 176" H,O (50 Hz)
MAX. AIR FLOW-210 CFM (60 Hz), 180 CFM (50 Hz)
PRODUCT FEATURES
• Rugged construction, low maintenance
• Oilless operation
• UL and CSA approved TEFC motor with permanently
sealed ball bearings
• IP54 rated enclosure on motors
• Cast iron muffler box
• Cast aluminum blower housing, cover and impeller
• Can be mounted in any plane
• Inlet and outlet have internal muffling
RECOMMENDED ACCESSORIES
• Pressure gauge AE133F
• Inlet filter AJ126G (pressure)
• Vacuum gauge AE134F
• Vacuum gauge for monitoring inlet filter restriction AJ497
• Pressure relief valve PV102 (60 Hz), PV098 (50 Hz)
• Vacuum relief valve AG258F
• Silencer for vacuum relief valve AJ121 G
• lnline filter AJ151 G (vacuum)
• External mufflerforadditional silencing AJ121G
• Liquid separator RMS400 (for vacuum line)
21.89 55·'.()1
I 12.29 312,17
3.64 9246
.5%o 14,9') llXJ,3J 2X7.38
' .,
1 .1
Gast Manufacturing Inc., A Unit of IDEX Corporation, Benton Harbor, Ml USA• ph 616-926-6171 • fx 616-925-8288 • www.gastmfg.com
®Registered Trademark/™Trademark of Gast Manufacturing Inc., Copyright ©2001 Gast Manufacturing Jnc. All rights reserved.
•
•
•
Product Specifications
MODEL NUMBER R7H31O0A
Motor Enclosure TEFC
HP/kW 60 Hz 10/7,5
50 Hz 8/6,0
Voltage 60 Hz 208-230/460-60-3
50 Hz 190-220/380-415-50-3
Amps 60 Hz 32.6-30/15
50 Hz 29-27.2/14.5-13.6
Starting Amps 60 Hz 129 @460V
50 Hz Consult Factory
Insulation Class F
Recommended NEMA Starter Size 2/1
Net Weight (lbs/kg} 275/125
Product Performance-----------------------------
mbar psig
750-11
700-10
600-9
8
500 7
400 6
5 300 4
200-3
2
"H 20
300
250
200
I
SOH~
PRESSURE
'
60 Hz
\
\ \
\ \
\ \ 100
150
100
50 ""'\,
50 100 150
' 100 200 300
Free Air Flow
J~!i:s ~~L-1 I
250_~ _ __,_ _ __,_ _ __,__ Blower 200~
Air Temp 150
R. (OF) 100 ,se so
0 0 50 100 150 200
200 250
400
I-I
I {oH,j
cfm
m3/h
250 300 "H 20
100 2IJO 300 400 500 600 700 mbar
Pressure
mbar "Hg
500 14
400 12
10
300 8
200 6
4
100-
2
"H20
200
\
VACUUM
\
\60Hz
~5oH'>"
175
150
125
100
75
50
25
00
'\ ~"
-~ ~
I"'-."~
50 100 150 200 250 cfm -------------
100 200 300 400 m3/h
Free Air Flow
~~;u~r :oaF I I I ao'H I ~ I
K Watts .__E .__l'----JC.......:..05u'-"--'Hz l___,
2
l___,7___,
111 JfM:J
25 50 75 100 125 150 175 200 "H20
100 200 300
Vacuum
400 500 mbar
Gast Manufacturing Inc., A Unit of IDEX Corporation, Benton Harbor, Ml USA• ph 616-926-6171 • fx. 616-925-8288 • www.gastrnfg.com 51 ®Reaistered Trademark/™TrademRrk of Gast M1m11f.<1r.t11rinn lnr r.nm,rinht /f,1·;;,nn1 D.:::i<:.t ~foni ,b,-t,.,;,..,.., lnr lill ,inht., ,.,,.,0,,,,,,-1
CERTIFIED MAIL
RETURN RECEIPT REQUESTED
October 17, 2003
Rusher Oil Company
P.O. Box 1483
Salisbury, NC 28145
Subject: Notice Concerning the Request
for a Soil Vapor Extraction/ Air Sparging Corrective Action Plan
Incident #223 3 2
Texaco Food Mart #2
1700 Cotton Grove Road
Lexington, Davidson County, North Carolina
Dear Property Owner/Occupant:
This letter is to inform you that the NC Division of Waste Management (DWM) has received a
request for approval of a proposal to cleanup a discharge or release from a petroleum underground
storage tank system located in your area. Because the property in your county is located within or
contiguous to an area containing contamination or within or contiguous to an area where the
contamination is expected to migrate, the State rules governing groundwater classifications and
standards (ISA NCAC 2L.0l 15), require that you be informed of the proposed activities.
Shield Engineering, Inc., (Shield) on behalf of the responsible party, Techno, LLC for Holding
Brothers, Inc., is providing notice of the request for approval ofa Corrective Action Plan (CAP) that
proposes:
To cleanup groundwater contamination to a standard other than the groundwater standard
or interim standard established in 15A NCAC 2L.0202; and
To cleanup soil contamination to a standard other than the residential or soil-to-groundwater
maximum contaminant concentration, whichever is lower.
The source area of the contamination is located at the intersection at 1700 Cotton Grove Road,
Lexington, Davidson County, North Carolina. Please see the attached map showing the location of
the source area of the discharge or release.
Some of the constituents found in the groundwater at the above location are typical of gasoline
related contamination and have been detected beneath the site in concentrations which exceed the
Groundwater Quality Standards in ISA NCAC 2L.0202. Based on the information provided in
previous reports, it is the professional opinion of Shield that if the proposed CAP is approved by the
NCDENR, then implementation will result in the following:
4301 Taggart Creek Road
Charlotte, NC 28208 www.shieldengineering.com
~
Telephone [phone]
Fax [phone]
Gradual decrease in the level of gasoline constituents present in the groundwater beneath the
site through a combination of soil vapor extraction and air injection.
Control of the migration of the constituents within the impacted area and thereby providing
protection for human health and the environment; and
Protection of adjacent property values and projected future uses of the adjacent properties
through the implementation of a groundwater monitoring program.
The Winston Salem Regional Office has the CAP along with other site information on file and
available for public review. You may make copies of this information for a small fee. Any written
comments concerning this request should be submitted to the following address within thirty (30)
days of the date that this letter was issued:
Mr. Michael Rogers
North Carolina Department of Environment and Natural Resources
585 Waughtown Street
Winston-Salem, North Carolina 27107
Phone [phone]
All comments received within this time frame will be considered in approving the CAP. A public
meeting may be held should the Director of the DWM find a significant degree of public activities.
Mr. Michael Rogers may be contacted during normal weekday business hours to answer questions
or to arrange an appointment to review the information on file pertaining to the discharge or release.
Sincerely,
SHIELD ENGINEERING, INC.
John Long
Project Manager
cc: Mr. Michael Rogers, NCDENR-WSRO
Techno, LLC
File
H:\Engineering (01 I0)\2000\1001289\CAP\basis of design -notifletters.doc
CERTIFIED MAIL
RETURN RECEIPT REQUESTED
October 17, 2003
Mr. Harvey H. Hayes, Jr.
163 Woods Island Road
Lexington, NC 27292
Subject: Notice Concerning the Request
for a Soil Vapor Extraction/ Air Sparging Corrective Action Plan
Incident #223 3 2
Texaco Food Mart #2
1700 Cotton Grove Road
Lexington, Davidson County, North Carolina
Dear Mr. Hayes:
This letter is to inform you that the NC Division of Waste Management (DWM) has received a
request for approval of a proposal to cleanup a discharge or release from a petroleum underground
storage tank system located in your area. Because the property in your county is located within or
contiguous to an area containing contamination or within or contiguous to an area where the
contamination is expected to migrate, the State rules governing groundwater classifications and
standards (15A NCAC 2L.0115), require that you be informed of the proposed activities.
Shield Engineering, Inc., (Shield) on behalf of the responsible party, Techno, LLC for Holding
Brothers, Inc., is providing notice of the request for approval of a Corrective Action Plan (CAP) that
proposes:
· To cleanup groundwater contamination to a standard other than the groundwater standard
or interim standard established in 15A NCAC 2L.0202; and
· To cleanup soil contamination to a standard other than the residential or soil-to-groundwater
maximum contaminant concentration, whichever is lower.
The source area of the contamination is located at the intersection at 1700 Cotton Grove Road,
Lexington, Davidson County, North Carolina. Please see the attached map showing the location of
the source area of the discharge or release.
Some of the constituents found in the groundwater at the above location are typical of gasoline
related contamination and have been detected beneath the site in concentrations which exceed the
Groundwater Quality Standards in 15A NCAC 2L.0202. Based on the information provided in
previous reports, it is the professional opinion of Shield that if the proposed CAP is approved by the
NCDENR, then implementation will result in the following:
4301 Taggart Creek Road
Charlotte, NC 28208 www.shieldengineering.com Telephone [phone]
Fax [phone]
Gradual decrease in the level of gasoline constituents present in the groundwater beneath the
site through a combination of soil vapor extraction and air injection.
Control of the migration of the constituents within the impacted area and thereby providing
protection for human health and the environment; and
Protection of adjacent property values and projected future uses of the adjacent properties
through the implementation of a groundwater monitoring program.
The Winston Salem Regional Office has the CAP along with other site information on file and
available for public review. You may make copies of this information for a small fee. Any written
comments concerning this request should be submitted to the following address within thirty (30)
days of the date that this letter was issued:
Mr. Michael Rogers
North Carolina Department of Environment and Natural Resources
585 Waughtown Street
Winston-Salem, North Carolina 27107
Phone [phone]
All comments received within this time frame will be considered in approving the CAP. A public
meeting may be held should the Director of the DWM find a significant degree of public activities.
Mr. Michael Rogers may be contacted during normal weekday business hours to answer questions
or to arrange an appointment to review the information on file pertaining to the discharge or release.
Sincerely,
SHIELD ENGINEERING, INC.
John Long
Project Manager
cc: Mr. Michael Rogers, NCDENR-WSRO
Techno, LLC
File
H:\Engineering (Ol l0)\2000\1001289\CAP\basis of design -notifletters.doc
CERTIFIED MAIL
RETURN RECEIPT REQUESTED
October 17, 2003
LEX Pump, Inc.
1743 Fairgrove Church Road
Conover, NC 28613
Subject: Notice Concerning the Request
for a Soil Vapor Extraction/ Air Sparging Corrective Action Plan
Incident #223 3 2
Texaco Food Mart #2
1700 Cotton Grove Road
Lexington, Davidson County, North Carolina
Dear Property Owner/Occupant:
This letter is to inform you that the NC Division of Waste Management (DWM) has received a
request for approval of a proposal to cleanup a discharge or release from a petroleum underground
storage tank system located in your area. Because the property in your county is located within or
contiguous to an area containing contamination or within or contiguous to an area where the
contamination is expected to migrate, the State rules governing groundwater classifications and
standards (15A NCAC 2L.0l 15), require that you be informed of the proposed activities.
Shield Engineering, Inc., (Shield) on behalf of the responsible party, Tecbno, LLC for Holding
Brothers, Inc., is providing notice of the request for approval of a Corrective Action Plan (CAP) that
proposes:
· To cleanup groundwater contamination to a standard other than the groundwater standard
or interim standard established in 15A NCAC 2L.0202; and
· To cleanup soil contamination to a standard other than the residential or soil-to-groundwater
maximum contaminant concentration, whichever is lower.
The source area of the contamination is located at the intersection at 1700 Cotton Grove Road,
Lexington, Davidson County, North Carolina. Please see the attached map showing the location of
the source area of the discharge or release.
Some of the constituents found in the groundwater at the above location are typical of gasoline
related contamination and have been detected beneath the site in concentrations which exceed the
Groundwater Quality Standards in 15A NCAC 2L.0202. Based on the information provided in
previous reports, it is the professional opinion of Shield that if the proposed CAP is approved by the
NCDENR, then implementation will result in the following:
4301 Taggart Creek Road
Charlotte, NC 28208 www.shieldengineering.com
Telephone [phone]
Fax [phone]
Gradual decrease in the level of gasoline constituents present in the groundwater beneath the
site through a combination of soil vapor extraction and air injection.
Control of the migration of the constituents within the impacted area and thereby providing
protection for human health and the environment; and
Protection of adjacent property values and projected future uses of the adjacent properties
through the implementation of a groundwater monitoring program.
The Winston Salem Regional Office has the CAP along with other site information on file and
available for public review. You may make copies of this information for a small fee. Any written
comments concerning this request should be submitted to the following address within thirty (30)
days of the date that this letter was issued:
Mr. Michael Rogers
North Carolina Department of Environment and Natural Resources
585 Waughtown Street
Winston-Salem, North Carolina 27107
Phone [phone]
All comments received within this time frame will be considered in approving the CAP. A public
meeting may be held should the Director of the DWM find a significant degree of public activities.
Mr. Michael Rogers may be contacted during normal weekday business hours to answer questions
or to arrange an appointment to review the information on file pertaining to the discharge or release.
Sincerely,
SHIELD ENGINEERING, INC.
John Long
Project Manager
cc: Mr. Michael Rogers, NCDENR-WSRO
Techno, LLC
File
H:\Engineering (0110)\2000\1001289\CAP\basis of design -notifletters.doc
f~SHIELD
.. ENGINEERING, INC.
CERTIFIED MAIL
RETURN RECEIPT REQUESTED
October 17, 2003
LEXSF,Inc.
1743 Fairgrove Church Road
Conover, NC 28613
Subject: Notice Concerning the Request
for a Soil Vapor Extraction/ Air Sparging Corrective Action Plan
Incident #223 3 2
Texaco Food Mart #2
1700 Cotton Grove Road
Lexington, Davidson County, North Carolina
Dear Property Owner/Occupant:
This letter is to inform you that the NC Division of Waste Management (DWM) has received a
request for approval of a proposal to cleanup a discharge or release from a petroleum underground
storage tank system located in your area. Because the property in your county is located within or
contiguous to an area containing contamination or within or contiguous to an area where the
contamination is expected to migrate, the State rules governing groundwater classifications and
standards (ISA NCAC 2L.0l 15), require that you be informed ofthe proposed activities.
Shield Engineering, Inc., (Shield) on behalf of the responsible party, Techno, LLC for Holding
Brothers, Inc., is providing notice of the request for approval of a Corrective Action Plan (CAP) that
proposes:
To cleanup groundwater contamination to a standard other than the groundwater standard
or interim standard established in ISA NCAC 2L.0202; and
To cleanup soil contamination to a standard other than the residential or soil-to-groundwater
maximum contaminant concentration, whichever is lower.
The source area of the contamination is located at the intersection at 1700 Cotton Grove Road,
Lexington, Davidson County, North Carolina. Please see the attached map showing the location of
the source area of the discharge or release.
Some of the constituents found in the groundwater at the above location are typical of gasoline
related contamination and have been detected beneath the site in concentrations which exceed the
Groundwater Quality Standards in ISA NCAC 2L.0202. Based on the information provided in
previous reports, it is the professional opinion of Shield that if the proposed CAP is approved by the
NCDENR, then implementation will result in the following:
4301 Taggart Creek Road
Charlotte, NC 28208 www.shieldengineering.com Telephone [phone]
Fax [phone]
Gradual decrease in the level of gasoline constituents present in the groundwater beneath the
site through a combination of soil vapor extraction and air injection.
Control of the migration of the constituents within the impacted area and thereby providing
protection for human health and the environment; and
Protection of adjacent property values and projected future uses of the adjacent properties
through the implementation of a groundwater monitoring program.
The Winston Salem Regional Office has the CAP along with other site information on file and
available for public review. You may make copies of this information for a small fee. Any written
comments concerning this request should be submitted to the following address within thirty (30)
days of the date that this letter was issued:
Mr. Michael Rogers
North Carolina Department of Environment and Natural Resources
585 Waughtown Street
Winston-Salem, North Carolina 27107
Phone [phone]
All comments received within this time frame will be considered in approving the CAP. A public
meeting may be held should the Director of the DWM find a significant degree of public activities.
Mr. Michael Rogers may be contacted during normal weekday business hours to answer questions
or to arrange an appointment to review the information on file pertaining to the discharge or release.
Sincerely,
SHIELD ENGINEERING, INC.
John Long
Project Manager
cc: Mr. Michael Rogers, NCDENR-WSRO
Techno, LLC
File
H:\Engineering (OJ J0)\2000\1001289\CAP\basis of design -notifletters.doc
CERTIFIED MAIL
RETURN RECEIPT REQUESTED
October 17, 2003
Ms. Diane Crouse
Davidson County Health Director
915 N. Greensboro Street
Lexington, NC 27292
Subject: Notice Concerning the Request
for a Soil Vapor Extraction/ Air Sparging Corrective Action Plan
Incident #22332
Texaco Food Mart #2
1 700 Cotton Grove Road
Lexington, Davidson County, North Carolina
Dear Ms. Crouse:
This letter is to inform you that the NC Division of Waste Management (DWM) has received a
request for approval of a proposal to cleanup a discharge or release from a petroleum underground
storage tank system located in your area. Because the property in your county is located within or
contiguous to an area containing contamination or within or contiguous to an area where the
contamination is expected to migrate, the State rules governing groundwater classifications and
standards (15A NCAC 2L.0115), require that you be informed of the proposed activities.
Shield Engineering, Inc., (Shield) on behalf of the responsible party, Techno, LLC for Holding
Brothers, Inc., is providing notice of the request for approval of a Corrective Action Plan (CAP) that
proposes:
To cleanup groundwater contamination to a standard other than the groundwater standard
or interim standard established in 15A NCAC 2L.0202; and
To cleanup soil contamination to a standard other than the residential or soil-to-groundwater
maximum contaminant concentration, whichever is lower.
The source area of the contamination is located at the intersection at 1700 Cotton Grove Road,
Lexington, Davidson County, North Carolina. Please see the attached map showing the location of
the source area of the discharge or release.
Some of the constituents found in the groundwater at the above location are typical of gasoline
related contamination and have been detected beneath the site in concentrations which exceed the
Groundwater Quality Standards in 15A NCAC 2L.0202. Based on the information provided in
previous reports, it is the professional opinion of Shield that if the proposed CAP is approved by the
NCDENR, then implementation will result in the following:
4301 Taggart Creek Road
Charlotte, NC 28208 www.shieldengineering.com Telephone [phone]
Fax [phone]
Gradual decrease in the level of gasoline constituents present in the groundwater beneath the
site through a combination of soil vapor extraction and air injection.
Control of the migration of the constituents within the impacted area and thereby providing
protection for human health and the environment; and
Protection of adjacent property values and projected future uses of the adjacent properties
through the implementation of a groundwater monitoring program.
The Winston Salem Regional Office has the CAP along with other site information on file and
available for public review. You may make copies of this information for a small fee. Any written
comments concerning this request should be submitted to the following address within thirty (30)
days of the date that this letter was issued:
Mr. Michael Rogers
North Carolina Department of Environment and Natural Resources
585 Waughtown Street
Winston-Salem, North Carolina 27107
Phone [phone]
All comments received within this time frame will be considered in approving the CAP. A public
meeting may be held should the Director of the DWM find a significant degree of public activities.
Mr. Michael Rogers may be contacted during normal weekday business hours to answer questions
or to arrange an appointment to review the information on file pertaining to the discharge or release.
Sincerely,
SHIELD ENGINEERING, INC.
John Long
Project Manager
cc: Mr. Michael Rogers, NCDENR-WSRO
Techno, LLC
File
H:\Engineering (0110)\2000\1001289\CAP\basis of design~ notifletters.doc
6:SHIELD T"" ENGINEERING, INC.
♦&.I.l.i!J}
CERTIFIED MAIL
RETURN RECEIPT REQUESTED
October 17, 2003
Mr. Robert Hyatt
Davidson County Manager
PO Box 1067
Lexington, NC 27292
Subject: Notice Concerning the Request
for a Soil Vapor Extraction/Air Sparging Corrective Action Plan
Incident #223 3 2
Texaco Food Mart #2
1700 Cotton Grove Road
Lexington, Davidson County, North Carolina
Dear Mr. Hyatt:
This letter is to inform you that the NC Division of Waste Management (DWM) has received a
request for approval of a proposal to cleanup a discharge or release from a petroleum underground
storage tank system located in your area. Because the property in your county is located within or
contiguous to an area containing contamination or within or contiguous to an area where the
contamination is expected to migrate, the State rules governing groundwater classifications and
standards (15A NCAC 21.0115), require that you be informed of the proposed activities.
Shield Engineering, Inc., (Shield) on behalf of the responsible party, Techno, LLC for Holding
Brothers, Inc., is providing notice of the request for approval of a Corrective Action Plan (CAP) that
proposes:
To cleanup groundwater contamination to a standard other than the groundwater standard
or interim standard established in 15A NCAC 21.0202; and
To cleanup soil contamination to a standard other than the residential or soil-to-groundwater
maximum contaminant concentration, whichever is lower.
The source area of the contamination is located at the intersection at 1700 Cotton Grove Road,
Lexington, Davidson County, North Carolina. Please see the attached map showing the location of
the source area of the discharge or release.
Some of the constituents found in the groundwater at the above location are typical of gasoline
related contamination and have been detected beneath the site in concentrations which exceed the
Groundwater Quality Standards in ISA NCAC 21.0202. Based on the information provided in
previous reports, it is the professional opinion of Shield that if the proposed CAP is approved by the
NCDENR, then implementation will result in the following:
4301 Taggart Creek Road
Charlotte, NC 28208 www.shieldengineering.com Telephone [phone]
Fax [phone]
Gradual decrease in the level of gasoline constituents present in the groundwater beneath the
site through a combination of soil vapor extraction and air injection.
Control of the migration of the constituents within the impacted area and thereby providing
protection for human health and the environment; and
Protection of adjacent property values and projected future uses of the adjacent properties
through the implementation of a groundwater monitoring program.
The Winston Salem Regional Office has the CAP along with other site information on file and
available for public review. You may make copies of this information for a small fee. Any written
comments concerning this request should be submitted to the following address within thirty (30)
days of the date that this letter was issued:
Mr. Michael Rogers
North Carolina Department of Environment and Natural Resources
585 Waughtown Street
Winston-Salem, North Carolina 27I07
Phone [phone]
All comments received within this time frame will be considered in approving the CAP. A public
meeting may be held should the Director of the DWM find a significant degree of public activities.
Mr. Michael Rogers may be contacted during normal weekday business hours to answer questions
or to arrange an appointment to review the information on file pertaining to the discharge or release.
Sincerely,
SHIELD ENGINEERING, INC.
John Long
Project Manager
cc: Mr. Michael Rogers, NCDENR-WSRO
Techno, LLC
File
H:\Engineering (0110)\2000\1001289\CAP\basis of design 8 notifletters.doc
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