11206_Syncot Fibers_SVSurvey_20080208

Soil Vapor Survey
Former Syncot Fibers Facility
Charlotte, North Carolina
NC Brownfields Project No. 11026-07-60
H&H Job No. CBC-003
February 8, 2008
Hart & HickmaIl
2923 South Tryon Street
Suite 100
Charlotte, NC 28203
704-586-0007
8601 Six Forks Road
Suite 400
Raleigh, NC 27615
919-847-4241

Via Email and Mail
February 8, 2008
NC DENR Brownfields Program
1314 Mallard Ridge Rd
Tega Cay, SC 29708
Attention: Ms. Carolyn F. Minnich
Brownfields Project Manager
Re: Soil Vapor Survey
Former Syncot Fibers Facility
2459 Wilkinson Blvd
Charlotte, North Carolina
NC Brownfields Project No. 11026-07-60
H&H Job No. CBC-003
Dear Ms. Minnich:
1.0 Introduction and Background
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Hart & Hiclunan, PC
2923 South Tryon Street
Suite 100 Charlotte, NC
28203-3449
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704-586-0373 fax
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In accordance with the request in the North Carolina Department of Environment and Natural
Resources (DENR) Brownfields Section's letter dated November 2, 2007, Hart & Hickman, PC
(H&H) has prepared this Soil Vapor Survey Report for the former Syncot Fibers facility at 2459
Wilkinson Blvd in Charlotte, Mecklenburg County, North Carolina. Figure 1 depicts the
location of the site.
The former Syncot Fibers facility contains a brick building with a total of 56,958 square feet
spread over two floors and a basement level. The basement portion of the building is constructed
on a concrete slab foundation with the exception of the northeast corner of the building which is
built over a tall crawl space with a dirt floor. The crawl space can be accessed from the
basement level because there is not a wall separating the crawl space from the rest of the
basement.
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Ms. Carolyn Minnich
February 8, 2008
Page 2
Previous assessment activities conducted by H&H in association with the former Syncot Fibers
facility indicated that the soil and ground water at two discrete locations at the site are impacted
with low levels of chlorinated volatile organic compounds (VOCs). Soil beneath the basement
slab floor contained 6 µg/kg of tetrachloroethene (PCE) at one location (SB-9), and ground water
from a downgradient temporary monitoring well (TW-2) contained 16 µg/l PCE (Figure 2).
In the November 2, 2007 Additional Site Assessment Activities letter, DENR Brownfields
requested that soil gas or subslab soil gas samples be collected in the basement of the building
and around the former machine shop. As requested by DENR, a work plan for the soil vapor
assessment was provided in a letter dated December 7, 2007. The work plan was approved by
DENR on December 11, 2007. The soil vapor survey activities were conducted on December
27, 2007. The methods and results of the soil vapor survey are provided in Sections 2 and 3.
Additional information regarding this property is provided below regarding the questions in
DENR's November 2, 2007 letter.
DENR Question 1: Please provide assessment data for the machine shop indicated on Figure 2
near the northeast corner of the building
Response: The machine shop was on the first floor of the northeast portion of the building above
a tall crawl space. The small machine shop was either a light machine shop or just a work shop.
H&H sampled shallow soil in the crawl space for VOCs, semi-VOCs, OCPs, and metals (Figure
2). The only detection in the sample labeled "Crawl Space" (other than background metals) was
acetone at 0.249 mg/kg (Table 2). The acetone detection may be from laboratory -introduced
contamination. Based on these considerations, the machine shop is not a significant
environmental concern.
DENR Question 2: Monitoring well MW-1 is shown on Figure 2. If MW-1 is still on site, please
provide construction details.
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Ms. Carolyn Minnich
February 8, 2008
Page 3
Response: According to the Froehling & Robertson, Inc.'s (F&R's) Limited Site Assessment
(LSA) Report dated April 5, 2006 for a former UST basin, monitoring well MW-1 was installed
on February 9, 2006, is approximately 34 ft deep, and is screened from 19 to 34 feet. The LSA
report and the subsequent No Further Action letter issued by DENR are included as Appendix D
of our Phase I & II Environmental Site Assessment (ESA) report dated June 15, 2007. The
monitoring well is still in place but will be abandoned prior to site re -development.
DENR Oueslion 3: Please confirm that General Dyestuff operated on the property f ona 1940
through 1980.
Response: General Dyestuff operated from the property from approximately 1940 to 1980. As
noted in H&H's June 15, 2007 Phase I & II ESA, cross-reference directories indicated that the
site was occupied by General Dyestuff from the early 1940s until sometime in 1981. This
information was corroborated by an interview with Mr. Charles Bing (property owner) who
purchased the site in 1980. As noted in the ESA, other companies also operated from the site
between 1940 and 1980.
2.0 Soil Vapor Sampling
2.1 Soil Vapor Sample Collection
The soil gas sampling was conducted on December 27, 2007 in accordance with the approved
work plan. The locations of the sampling points, labeled SV-1 through SV-6, are indicated in
Figure 2.
Prior to conducting soil gas sampling activities, H&H drilled though the concrete floor utilizing
a concrete drill and an approximate 1.5-inch diameter bit. H&H observed that no gravel was
present immediately beneath the building slab. Therefore, in accordance with the work plan, soil
vapor samples were collected approximately 6 inches below the bottom of the concrete slab. The
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Ms. Carolyn Mimuch
February 8, 2008
Page 4
soil vapor sample SV-6, collected in the downgradient portion of the crawl space, was taken at a
depth of 2.5 ft below grade to prevent short circuiting through the unpaved and very dry soil
surface in the crawl space.
The sampling points contained a stainless steel screen that was opened following placement of
the point at the sampling depth using a hatmner tool. The annulus between the sampling rod and
the surface at each sample location was sealed using hydrated bentonite in order to prevent
ambient air from entering the sample.
Prior to sampling, air in the newly installed point was slowly purged using a peristaltic pump. A
1-liter Summa canister under vacuum was then attached to the top of each sampling point using
new silicon tubing. To prevent short circuiting of ambient air to the sample canister, the Summa
canisters were allowed to fill slowly. All connections were checked for leaks using a proprietary
leak detection compound. No leaks were found. To achieve the desired sample volume, the
samples were collected over a period of approximately 1 hour using a flow regulator. After
sample collection, the regulator valve on the canister was closed and the sampling tubing and
rods were removed. The stainless steel sampling rods were decontaminated between sample
locations.
For quality control purposes and analytical reproducibility evaluation, a duplicate sample
(labeled Duplicate) was collected at sample location SV-3.
2.2 Soil Vapor Sample Analysis
Based on previous soil and ground water analytical data and the approved work plan, the vapor
samples were analyzed for the following target VOCs:
Benzene
Ethylbenzene
Toluene
m,p-Xylenes
o-Xylene
Tetrachloroethene
Trichloroethene
1, 1, 1 -Trichloroethane
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Ms. Carolyn Minnich
February 8, 2008
Page 5
Chloroform
Dichloromethane
1,2-Dichloroethane
Vinyl Chloride
cis-1,2-Dichloroethene
trans-1,2-Dichloroethene
1,1-Dichloroethene
The analyses were conducted by Test America of Knoxville, Tennessee using EPA Method TO-
15.
2.3 Soil Vapor Results and Discussion
Of the 15 constituents analyzed by the laboratory, only 5 were detected in the soil gas samples.
Of the 5 analytes detected in the subslab soil gas samples, only benzene and trichloroethene
(TCE) exceeded their respective EPA look -up screening levels at 10-6 risk. Specifically, soil gas
samples SV-1, SV-2, SV-3 Duplicate, SV-5, and SV-6 contained benzene (2.0 ppbv, 2.3 ppbv,
2.2 ppbv, 2.2 ppbv, and 2.2 ppbv, respectively), and soil gas sample SV-3 contained TCE (5.9
ppbv). There was variability in the SV-3 duplicate sample, but all detections were low. The
results of the laboratory analysis of the soil vapor samples are summarized in Table 1, and the
analytical data sheets are attached in Appendix A.
To evaluate the soil gas sample data, the results were compared to screening levels published by
the Environmental Protection Agency (EPA) in the document Draft Guidance for Evaluating the
Vapor Intrusion to Indoor Air dated November 2002 (EPA 530-F-02-052). This document is
referred to hereafter as the EPA Vapor Intrusion Guidance.
H&H conservatively compared the site data to the shallow soil gas screening levels in Table 213
of the Vapor Intrusion Guidance which is based upon a residential exposure scenario and a
lifetime incremental cancer risk of 10-6 for carcinogens and hazard index of 1 for non -
carcinogens. This is conservative because the future use of the site will be commercial/industrial
and the screening levels are based upon conservative exposure parameters.
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Ms. Carolyn Minnich
February 8, 2008
Page 6
The screening levels are presented along with the site data in Table 1. Because the
concentrations of benzene and TCE exceeded the EPA look -up values which are based upon very
conservative exposure assumptions, H&H conducted site -specific vapor intrusion modeling
using EPA's Johnson and Ettinger model. The results of the site -specific modeling are presented
in the following section.
3.0 Johnson & Ettinger Soil Vapor Modeling
3.1 Introduction and Model Setup
To further screen the benzene and TCE soil vapor data, H&H conducted site -specific vapor
intrusion modeling using the Johnson and Ettinger (J&E) model (Version 3.1, February 2004).
The J&E model is a screening -level, one-dimensional analytical solution for convective and
diffusive vapor transport into indoor air spaces that relates vapor concentration at a subsurface
source (i.e., soil, soil vapor, or ground water) to the vapor concentration in indoor air space.
Inputs to the model include chemical properties of the contaminant, properties of the soil, and
structural properties of the building. The J&E model is based upon a number of simplifying
assumptions regarding compound distribution and occurrence, subsurface characteristics,
transport mechanisms, and building construction. The assumptions are generally reasonable yet
conservative. Because of the model's conservative nature, it is likely that it will over -predict
compound concentrations in indoor air (EPA Vapor hrtrusion Guidance).
Other inputs to the screening model used in this evaluation included the following which were
based upon either site -specific measurements or best judgment:
• an enclosed space floor slab on grade thickness of 15 cm;
• the soil gas sampling depth below grade of 30.5 cm for subslab samples;
• an average soil temperature of 20 C; and
• a soil type of silty clay.
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February 8, 2008
Page 7
The risk calculations were conservative based upon a residential exposure scenario including an
exposure duration of 30 years for 350 days per year, an averaging time of 70 years for
carcinogens, and an averaging time for non -carcinogens of 30 years. J&E screening model input
and output data are provided in Appendix B.
3.2 J&E Model Results
The J&E soil gas screening model indicates that the average benzene concentration is less than
the target risk level of 10-6 for carcinogenic effects and less than a hazard quotient of 1 for non -
carcinogenic effects. The model calculated carcinogenic risk level for benzene is 1.7 x 10"9, and
the model calculated hazard quotient is 1.7 x 10-5 for non -carcinogenic effects (Table 1).
The screening level J&E soil gas screening model indicates that the TCE concentration is less
than the target risk level of 10-6 for carcinogenic effects and less than a hazard quotient of 1 for
non -carcinogenic effects. The model calculated carcinogenic risk level for TCE is 1.1 x 10-7, and
the model calculated hazard quotient is 5.7 x 10-5 for non -carcinogenic effects (Table 1).
Based upon the results of the J&E model, there is no evidence of unacceptable vapor intrusion
risks associated with underlying soil and ground water contamination in the area of the former
Syncot Fibers facility. This is consistent with March and April 2007 soil and ground water
analytical data which indicate only low VOC levels in soil and ground water near or below the
site building (Tables 2 and 3).
3.3 Additive Effects
Where multiple compounds are present, the additive risks for multiple compounds may be
considered in a risk evaluation. As noted in EPA's Draft Guidance, additive risk is not likely to
be an issue where there are a limited number of target compounds of concern, such as at this site.
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February 8, 2008
Page 8
As noted in the J&E modeling evaluation, site -specific compound risk levels are orders of
magnitude below target risk levels. Therefore, additive risk is not a concern for this site.
3.4 Sensitivity Analysis
As requested in the November 2, 2007 DENR Brownfields Additional Assessment Activities
letter, H&H performed a sensitivity analysis of the J&E soil gas screening model. The analysis
consisted of varying select input parameters (concentration, depth, temperature, and soil type),
and re -running the J&E screening model with the changes. A siunmaty of the sensitivity
analysis is presented in Table 4. Based on the limited variability in the calculated incremental
cancer risk and non -carcinogen hazard quotient when the select input parameters were changed,
the model is not sensitive. This suggests that the model is valid even with small differences in
input values.
4.0 Conclusions
Based upon the results of the subslab soil gas sampling, vapor intrusion into the site building
does not pose an unacceptable risk for site re -development. This is consistent with March and
April 2007 soil and ground water analytical data which indicate only low VOC levels in soil and
ground water near or below the site building. Based on this analysis, soil vapor intrusion
mitigation measures are not necessary for this site.
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Ms. Carolyn Minnich
February 8, 2008
Page 9
If you have any questions or comments, please do not hesitate to contact us.
Very truly yours,
Hart & Hickmau. PC
Matt Bramblett, PE
Principal and Project Manager
Attachments
CC. Robert Pressley, CBC
Beane Hutson, HMW
Ra
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Kevin Howell
Project Geologist
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Table 2
Soil Analytical Detections
Syncot Fibers Facility
Charlotte, North Carolina
H&H Job No. CBC-003
SCREENING LEVELS
Area of Concern
Rail Road
Sur
p
Southern
LoadingLoading
Dock
Western
g
Dock
Wastewater
Vault and
Sump
Former
Mixing
g
Room
Drum
Storage
g
Area
Drum
Storage
g
Area
Basement
Floor Drain
Crawl
Space
Background
Metals
Background
Metals
EPA REGION IX
IHWS
USGS Background
Metals
Sample ID
Depth (feet)
SB-1
1-2
SB-3
2-4
SB-4
2-4
SB-6
4-6
SB-7
1-2
SB-8
2-4
SB-9
1-2
SB-10
1-2
Crawl
Space Soil
0-0.5
SB-5
4-5
SB-5
9-10
Soil to GW
Screening
Levels (DAF 20)
Residential
PRGs
Industrial
PRGs
Residential
SRGs
Arithmetic
Mean
Range
Units
(mg/kg)
(mg/kg)
(mg/kg)
(mg/kg)
(mg/kg)
(mg/kg)
(mg/kg)
(mg/kg)
(mg/kg)
(mg/kg)
(mg/kg)
m/k
m k
m/k
m/k
mg/kg)
mg/kg)
VOCs (8260)
Acetone
Tetrachloroethene (PCE)
<0.051
<0.002
0.075
<0.003
<0.055
<0.002
<0.062
<0.002
0.074
<0.003
<0.055
<0.002
<0.056
0.006
<0.054
<0.002
0.249
<0.004
NA
NA
NA
NA
16
0.0060
14,000
0.48
54,000
1.3
2,800
0.48
v
Semi-VOCs (8270C)
ND
ND
ND
ND
ND
ND
ND
ND
ND
NA
NA
-.-
__
_
OCPs (8081A)
NA
NA
NA
NA
NA
NA
NA
NA
ND
NA
NA
--
Metals (6010B)
Arsenic
Barium
Chromium
Lead
<1.17
133
6.79
2.57
<1.45
107
175
8.25
<1.36
38.7
83.6
12.6
<1.36
227
158
8.02
<1.37
59.5
77.6
9.54
<1.24
67.1
8.96
16.5
1.48
108
137
8.74
<1.28
41.3
19.4
4.59
<1.57
76.3
99.6
18.4
<1.38
18.0
371
13.3
<1.22
44.8
328
7.05
29
1,600
38*
NS
0.39
5,400
30*
400
2
67,000
64*
800
4.4
NS
44*
400
7.2
380
54
19
<0.1-97
10-5,000
1-2,000
<10-700
Notes:
EPA Region IX residential and industrial Preliminary Remediation Goals (PRGs) with a dilution attenuation factor (DAF) of 20 taken from USEPA Region IX, 2004 Preliminary Remediation Goal Table (updated August 2005)
Residential Soil Remediation Goals (SRGs) from Inactive Hazardous Sites Branch (IHSB)
Samples collected by H&H on March 8, 2007; VOC = Volatile Organic Compound; OCPs = Organochlorine Pesticides; NS = Not Specified
NA = Not Analyzed; ND = Not Detected
USGS Background metals were obtained from the USGS Professional Paper 1270, Element Concentrations in Soils and Other Surficial Materials of the Conterminous United States.
Screening level conservatively based on Chromium VI
Metal detections appear to be naturally occurring
File:Tables,Soil Data
Date:2/7/2008

Table 3
Ground Water Analytical Detections
Syncot Fibers Facility
Charlotte, North Carolina
H&H Job No. CBC-003
Area of Concern
Downgradient
Former Mixing
Rail Road Spur
Room
2L Standard
Sample ID
TW-1
TW-2
TW-3
Units
(Ng/L)
(fag/L)
(Ng/L)
(pg/L)
VOCs (8260)
Tetrachloroethene (PCE)
<1.0
16
<0.002
0.7
Semi-VOCs (625)
ND
ND
ND
---
RCRA Metals (6010B/7471A)
Barium
71
27
64
2,000
Notes:
EPA Method number follows parameter in parenthesis; Bold indicates impact exceeds target level
Only compounds detected in at least one sample are shown
Barium detections appear to be naturally occurring
Samples collected by H&H on April 23, 2007; VOCs = Volatile Organic Compounds
ND = Not Detected
2L Standard = North Carolina 15A NCAC 2L ground water standard
File:Tables,GW Data
Date:2/7/2008

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SCALE IN FEET
U.S.G.S. QUADRANGLE MAP
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REVISED/INSPECTED 1888
QUADRANGLE
'7.5 MINUTE SERIES (TOPOGRAPHIC)
TIT[ E
SITE LOCATION MAP
PROJECT FORMER SYNCOT FIBERS FACILITY
CHARLOTTE, NORTH CAROLINA
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Charlotte, Noxth Carolina 28203
A PROFE9HIEJNAL CORPORATION 704-586-0007 (p) 704-586-0373 (1)
DATE: 2-6-08 REVISION NO: 0
JOB NO: CBC-003 FIGURE NO: 1

WILKINSON
BOULEVARD
J & T BODY
SHOP
FORMER — —
� STADIUM
SHELL
1 SB-5 I
fI
WESTSIDE + I TOWN &
AUTO SALES COUNTRY
1 r I DRIVE—IN
1
RESTAURANT
MW-1
LOWER LEVEL MACHINE
BOILER ROOM SHOP
1 CRAWL SPACE I
1 LOWER LEVEL
se-10 VAULT WITH
J • SUMP I
r SV-4 � 1
SV-6 I
I >, OSB-6
SB-4 F, ,.�SB-9 O I
SV_3 SV-5 I
. I �
SB-8
.. I
551 1 @Z LOWER LEVEL HYDRAULIC
SV—DW FLOWE & SONS 58-7 PRESSES AND ASTs
CONTRACTORS WOOD AND METAL
(EQUIPMENT YARD) r1 STORAGE Io+arr;c. DEBRIS PILE
( — hOL"Y 1N1l WijF- i
1 g h?fj+ _H.
TW-2 5B-1 TW_3 HF
I VEGETATED SB-3 I
I AREA
FORMER
I MIXING ROOM
I
WOODED AREA
1 If1
1 I
I
I GRAVEL
+ AREA HOUSEHOLD DEBRIS WITH
1 FEW DISAANNRDDTIRES BATTERIES
1
r 7W--1 I P
j I
jjj APPROXIMATE
I 1 0 80 160
SCALE IN FEET
'I II I IIII „ . .. . ...... ..... ...
LEGEND
SUBJECT PROPERTY BOUNDARY
+{-+H+H H+H FORMER RAIL SPUR
❑ DUMPSTER
E❑ ELEVATOR
T❑ ELECTRICAL TRANSFORMER ROOM (LOWER LEVEL)
SUBSLAB SOIL VAPOR SAMPLE
SOIL BORING LOCATION (LOCATIONS ARE APPROXIMATE)
TEMPORARY MONITOR WELL
EXISTING MONITOR WELL
H+F4fl-
m� SUBSLAB SOIL VAPOR
SAMPLE LOCATIONS
FORMER SYNCOT FIBERS FACILITY
2459 WILKINSON BOULEVARD
CHARLOTTE, NORTH CAROLINA
South 100
CaroliStreetna 282 3
Charlotte, Notth Cazolina 28203
ti Bart & Hickman Char North
A PROFESSIONAL CORPORATION 704-586-0007(p)704-586-0373(f
DATE: 2-6--08
REVISION NO. 0
JOB NO: CBC-003
FIGURE NO. 2

Appendix A
Analytical Data Sheets
S.AAA-Master PmlectslColdwell➢anker Commercial-CBQCBC-003 Synent Vapor%CBC-003 Bm Jields Site A.cvnsamem Repon.doc

TestAmerica
THE LEADER IN ENVIRONMENTAL TESTING
ANALYTICAL REPORT
PROJECT NO_ Syncot Fibers
CSC-003 Air Samples
Lot It: H71,2BO184
Kevin Howell
Hart & Hickman PC
2923 S Tryon Street
Suite 100
Charlotte, NC 28203
TESTAMERICA LABORATORIES, INC.
c
Te Wasmund��~
Pro ct Manager
January 8, 2008
TmtAmaim Laboratory, Inc
5815 Middlebrook Pike Knoxville, TN 37921 tel [phone] fax [phone] www."estamericainc.com

2
H7L280184
PARAMETER
Volatile Organics by TO15
References:
ANALYTICAL
METHOD
EPA-2 TO-15
EPA-2 "Compendium of Methods for the Determination of Toxic
Organic Compounds in Ambient Air", EPA-625/R-96/010b,
January 1999.

3
H7L280184
SAMPLED SAMP
WO # SAMPLE# CLIENT SAMPLE ID DATE TIME
KEWTL
001
SVl
12/27/07
10:00
KEWTW
002
SV2
12/27/07
10:35
KEWTX
003
SV3
12/27/07
10:52
KEWTO
004
SW
12/27/07
11:36
KEWT1
005
SV5
12/27/07
12:35
ICEWT2
006
SV6
12/27/07
13:35
KEWT4
007
DUPLICATE
12/27/07
12:02
- The analytical results of dot samples listed above am prescowd on the following pages.
- All calculations are performed before rounding to avoid round -off errors In calculated results-
- Results noted as "ND" were not dctccled at or above the stated limit.
- This report must not be reproduced, except in full, without die written approval of die laboratory.
- Results for the following parameters are never reported on a dry weight basis: color, corrosivily, density, Rashpaint, ignitability, layers, odor,
paint filter test, pH, porosity pressure, reactivity, redox potential, specific gravity, spot tests, solids, solubility, temperature, viscosity, and weight.

0
PROJECT NARRATIVE
H7L280I84
The results reported herein are applicable to the samples submitted for analysis only.
This report shall not be reproduced except in full, without the written approval of the
laboratory.
The original chain of custody documentation is included with this report.
Sample Receipt
There were no problems with the condition of the samples received.
Quality Control and Data Interpretation
Unless otherwise noted, all holding times and QC criteria were met and the test results
shown in this report meet all applicable NELAC requirements.
TestAmerica Knoxville maintains the following certifications, approvals and acercditations: Arkansas DEQ Carl. 1105-
043-0, California DHS ELAP Cart. #2423, Colorado DPHE, Connecticut DPI{ Cart. #PH-0223, Florida DOH Cart.
#E87177, Georgia DNR Cart, #906, Hawaii DOH, Illinois EPA Cart,'000687, Indiana DOH Cart. 4C-TN-02, lowa
DNR Cart. #375, Kansas DHE Cart. 4E-10349, Kentucky DEP Lab ID 090101, Louisiana DEQ Cart. #03079,
Louisiana DOHH Cart. #LA030024, Maryland DHMH Cart. 4277, Massachusetts DEP Cart. 4M-TN009, Michigan
DEQ Lab ID #9933, New Jersey DEP Cart. #TN001, New York DOH Lab # 10781, North Carolina DPH Lab 1D
#21705, North Carolina DEHNR Cart. 464, Ohio EPA VAP Cart. #CL0059, Oklahoma DEQ ID 119415, Pennsylvania
DEP Cart. #68-00576, South Carolina DHEC Lab ID #84001001, Tennessee DOH Lab ID 902014, Utah DOH Cart. ,.
QUAN3, Virginia DOS Lab ID #00165, Washington DOE Lab #C 120, West Virginia DEP Cart. #345, Wisconsin
DNR Lab ID 41998044300, Naval Facilities Engineering Service Center and USDA Soil Permit #S-46424. This list of
approvals is subject to change and does not imply that laboratory certification is available for all parameters reported in
this environmental sample data report.

A
Hart & Hickman PC
Client Sample ID: SV1
GC/MS Volatiles
Lot -Sample I...: H71,280189-001
Work Order a...:
KEWTLIAA
Matrix.........: AIR
Date Sampled...: 12/27/07
Date Received..:
12/28/07
Prep Date......: 01/02/08
Analysis Date..:
01/02/08
Prep Batch 4... : 8003222
Dilution Factor: 10
Method.........:
EPA-2 TO-15
REPORTING
PARAMETER
RESULT
LIMIT
UNITS
Methylene chloride
ND
5.0
ppb(v/v)
Trichloroethene
NO
2.0
ppb(v/v)
trans-1,2-Dichloroethene
ND
2.0
ppb(v/v)
Benzene
2.0
2.0
ppb(v/v)
Chloroform
ND
2.0
ppb(v/v)
1,2-Dichloroethane
ND
2.0
Ppb(v/v)
cis-1,2-Dichloroethene -
ND
2.0
ppb(v/v)
1,1-Dichloroethene
ND
2.0
ppb(v/v)
Ethylbenzene
ND
2.0
ppb(v/v)
Tetrachloroethene
ND
2.0
ppb(v/v)
Toluene
7.2
2.0
ppb(v/v)
1,1,1-Trichloroethane
NO
2.0
ppb(v/v)
Vinyl chloride
NO
2.0
ppb(v/v)
m-Xylene & p-Xylene
5.3
2.0
ppb(v/v)
o-Xylene
NO
2.0
ppb(v/v)
PERCENT
RECOVERY
SURROGATE
RECOVERY
LIMITS
1,2-Dichloroethane-d4
103
(70 - 130)
Toluene-d8
105
(70 - 130)
4-Bromofluorobenzene
98
(70 - 130)

R
Hart 6 Hickman PC
Client Sample ID: SV2
GC/MS Volatiles
Lot -Sample ;... : H71,280189-002
Work Order 4...:
REWTWlAA
Matrix.........: AIR
Date Sampled...: 12/27/07
Date Received..:
12/28/07
Prep Date......: 01/02/08
Analysis Date..:
01/02/08
Prep Batch II...: 8003222
Dilution Factor: 10
Method.........:
EPA-2 TO-15
REPORTING
PARAMETER
RESULT
LIMIT
UNITS
Methylene chloride
ND
5.0
ppb(v/v)
Trichloroethene
ND
2.0
ppb(v/v)
trans-1,2-Dichloroethene
ND
2.0
ppb(v/v)
Benzene
2.3
2.0
ppb(v/v)
Chloroform
ND
2.0
ppb(v/v)
1,2-Dichloroethane
ND
2.0
ppb(v/v)
cis-1,2-Dichloroethene
ND
2.0
ppb(v/v)
1,1-Dichloroethene
ND
2.0
ppb(v/v)
Ethylbenzene
ND
2.0
ppb(v/v)
Tetrachloroethene
ND
2.0
ppb(v/v)
Toluene
7.7
2.0
ppb(v/v)
1,1,1-Trichloroethane
ND
2.0
ppb(v/v)
Vinyl chloride
N➢
2.0
ppb(v/v)
m-Xylene s p-Xylene
5.0
2.0
ppb(v/v)
o-Xylene
ND
2.0
ppb(v/v)
PERCENT
RECOVERY
SURROGATE
RECOVERY
LIMITS
1,2-Dichloroethane-d9
104
(70 - 130)
Toluene -dB
103
(70 - 130)
9-Bromofluorobenzene
96
(70 - 130)

7
Lot -Sample 9...: H7L280189-003
Date Sampled...: 12/27/07
Prep Date......: 01/02/08
Prep Batch 8... : 6003222
Dilution Factor: 10
PARAMETER
trans-1,2-Dichloroethene
Methylene chloride
Trichloroethene
Benzene
Chloroform
1,2-Dichloroethane
cis-1,2-Dichloroethene
1,1-Dichloroethene
Ethylbenzene
Tetrachloxoethene
Toluene
1,1,1-Trichloroethane
Vinyl chloride
m-Xylene & p-Xylene
o-Xylene
SURROGATE
1,2-Dichloroethane-d9
Toluene-d8
4-Bromofluorobenzene
Hart & Hickman PC
Client Sample ID: SV3
GC/MS Volatiles
Work Order f...: KEWTXIAA
Date Received..: 12/28/07
Analysis Date..: 01/02/08
Method.........: EPA-2 TO-15
RESULT
ND
ND
5.9
ND
NO
ND
NO
ND
NO
NO
5.8
NO
ND
3.9
NO
PERCENT
RECOVERY
104
105
97
Matrix.........: AIR
REPORTING
T.TMTT TTMTIP.R
G.V
5.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2,0
RECOVERY
LIMITS
(70 - 130)
(70 - 130)
(70 - 130)
ppukVIVI
ppb(v/v)
ppb(v/v)
ppb(v/v)
ppb(v/v)
ppb(v/v)
ppb(v/v)
ppb(v/v)
ppb(v/v)
ppb(v/v)
ppb (v/v)
ppb(v/v)
ppb(v/v)
ppb(v/v)
ppb(v/v)

0
Lot -Sample I...: H71,280184-004
Date Sampled...: 12/27/07
Prep Date......: 01/02/08
Prep Batch I...: B003222
Dilution Factor: 10
PARAMETER
trans-1,2-Dichloroethene
Methylene chloride
Trichloroethene
Benzene
Chloroform
1,2-Dichloroethane
cis-1,2-Dichloroethene
1,1-Dichloroethene
Ethylbenzene
Tetrachloroethene
Toluene
1,1,1-Trichloroethane
Vinyl chloride
m-Xylene & p-Xylene
o-Xylene
SURROGATE
1,2-Dichloroethane-d4
Toluene-d8
4-Bromo£luorobenzene
Hart 6 Hickman PC
Client Sample ID: SV4
GC/MS Volatiles
Work Order 4...: KEWTOIAA
Date Received..: 12/28/07
Analysis Date..: 01/02/08
Method.........: EPA-2 TO-15
RESULT
NO
5.2
ND
ND
ND
NO
NO
ND
ND
NO
7.4
ND
ND
3.6
NO
PERCENT
RECOVERY
106
103
96
REPORTING
LIMIT
2.0
5.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
RECOVERY
LIMITS
(70 - 130)
(70 - 130)
(70 - 130)
Matrix.........: AIR
UNITS
ppb(v/v)
ppb (v/v)
ppb (v/v)
ppb(v/v)
ppb (v/v)
ppb (v/v)
ppb(v/v)
ppb (v/v)
ppb(v/v)
ppb(v/v)
ppb(v/v)
ppb (v/v)
ppb(v/v)
Ppb (v/v)
ppb(v/v)

0
Lot -Sample Y--- : H71,2801B9-005
Date Sampled...: 12/27/07
Prep Date......: 01/02/08
Prep Batch $... : 8003222
Dilution Factor: 10
PARAMETER
trans-1,2-Dichloroethene
Methylene chloride
Trichloroethene
Benzene
Chloroform
1,2-Dichloroethane
cis-1,2-Dichloroethene
1,1-Dichloroethene
Ethylbenzene
Tetrachloroethene
Toluene
1,1,1-Trichloroethane
Vinyl chloride
m-Xylene S p-Xylene
o-Xylene
SURROGATE
1,2-Dichloroethane-d4
Toluene-d8
4-Bromofluorobenzene
Hart & Hickman PC
Client Sample ID: SV5
GC/MS Volatiles
Work Order .... : HEWTIIAA
Date Received..: 12/28/07
Analysis Date..: 01/02/OB
Method.........: EPA-2 TO-15
RESULT
N➢
ND
ND
2.2
ND
ND
ND
ND
ND
ND
7.3
NO
ND
3.9
ND
PERCENT
RECOVERY
105
104
100
REPORTING
LIMIT
2.0
5.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
RECOVERY
LIMITS
(70 - 130)
(70 - 130)
(70 - 130)
Matrix.........: AIR
UNITS
ppb(v/v)
ppb(v/v)
ppb(v/v)
ppb(v/v)
ppb (v/v)
ppb(v/v)
ppb(v/v)
ppb(v/v)
opb(v/v)
ppb(v/v)
ppb(v/v)
ppb(v/v)
ppb(v/v)
ppb(v/v)
ppb(v/v)

WC
Lot -Sample 5... : H71,280184-006
Date Sampled...: 12/27/07
Prep Date......: 01/02/08
Prep Batch a...: 8003222
Dilution Factor: 10
Hart 6 Hickman PC
Client Sample ID: SV6
GC/MS Volatiles
Work Order 5...: KEWT21AA
Date Received..: 12/28/07
Analysis Date..: 01/02/08
Method.........: EPA-2 TO-15
Matrix.........: AIR
REPORTING
PARAMETER
RESULT
LIMIT
UNITS
trans-1,2-Dichloroethene
ND
2.0
ppb(v/v)
Methvlene chloride
ND
5.0
ppb(v/v)
Trichloroethene
ND
2.D
ppb(v/v)
Benzene
2.2
2.0
ppb(v/v)
Chloroform
ND
2.0
ppb(v/v)
1,2-Dichloroethane
NO
2.0
ppb(v/v)
cis-1,2-Dichloroethene
ND
2.0
ppb(v/v)
1,1-Dichloroethene
ND
2.0
ppb(v/v)
Ethylbenzene
ND
2.0
ppb(v/v)
Tetrachloroethene
NO
2.0
ppb(v/v)
Toluene
8.3
2.0
ppb(v/v)
1,1,1-Trichloroethane
ND
2.0
ppb(v/v)
Vinyl chloride
ND
2.0
ppb(v/v)
m-Xylene 6 p-Xylene
3.7
2.0
ppb(v/v)
o-Xylene
ND
2.0
ppb(v/v)
PERCENT
RECOVERY
SURROGATE
RECOVERY
LIMITS
1,2-Dichloroethane-d4
109
(70 - 130)
Toluene-d8
104
(70 - 130)
4-Sromofluorobenzene
99
(70 - 130)

11
Lot -Sample I...: H7L280184-007
Date Sampled...: 12/27/07
Prep Date......: 01/02/08
Prep Batch a...: B003222
Dilution Factor: 10
PARAMETER
trans-1,2-Dichloroethene
Trichloroethene
Methylene chloride
Benzene
Chloroform
1,2-Dichloroethane
cis-1,2-Dichloroethene
l,l-Dichloroethene
Ethylbenzene
Tetrachloroethene
Toluene
1,1,1-Trichloroethane
Vinyl chloride
m-Xylene & p-Xylene
o-Xylene
SURROGATE
1,2-Dichloroethane-d9
Toluene-d8
9-Bromofluorobenzene
Hart 6 Hickman PC
Client Sample ID: DUPLICATE
GC/MS Volatiles
Work Order $... : KEWT41AA
Date Received..: 12/28/07
Analysis Date..: 01/02/08
Method.........: EPA-2 TO-15
Matrix.........: AIR
REPORTING
RESULT
LIMIT
UNITS
ND
2.0
ppb(v/v)
ND
2.0
ppb(v/v)
NO
5.0
ppb(v/v)
2.2
2.0
ppb(v/v)
NO
2.0
ppb(v/v)
ND
2.0
ppb(v/v)
NO
2.0
ppb(v/v)
NO
2.0
ppb(v/v)
NO
2.0
ppb(v/v)
NO
2.0
ppb(v/v)
6.9
2.0
ppb(v/v)
NO
2.0
ppb(v/v)
NO
2.0
ppb(v/v)
3.6
2.0
ppb(v/v)
ND
2.0
ppb(v/v)
PERCENT
RECOVERY
RECOVERY
LIMITS
108
(70 - 130)
100
(70 - 130)
96
(70 - 130)

12
METBOD BLANK REPORT
GC/MS volatiles
Client Lot I...: H71,280184 Work Order f...: KE2DFIAA Matrix.........: AIR
ME Lot -Sample Q: H8A030000-222
Analysis Date..: 01/02/O6
Dilution Factor: 1
PARAMETER
trans-1,2-Dichloroethene
Methylene chloride
Trichloroethene
Benzene
Chloroform
1,2-Dichloroethane
cis-1,2-Dichloroethene
1,1-Dichloroethene
Ethylbenzene
Tetrachloroethene
Toluene
1,1,1-Trichloroethane
Vinyl chloride
m-Xylene & p-Xylene
o-Xylene
SURROGATE
1,2-Dichloroethane-d4
Toluene-d8
4-Bromofluorobenzene
Prep Date......: 01/02/08
Prep Batch #... : 8003222
REPORTING
RESULT
LIMIT
UNITS
METHOD
ND
0.20
ppb(v/v)
EPA-2
TO-15
NO
0.50
ppb(v/v)
EPA-2
TO-15
NO
0.20
ppb(v/v)
EPA-2
TO-15
NO
0.20
ppb(v/v)
EPA-2
TO-15
ND
0.20
ppb(v/v)
EPA-2
TO-15
NO
0.20
ppb(v/v)
EPA-2
TO-15
NO
0.20
ppb(v/v)
EPA-2
TO-15
NO
0.20
ppb(v/v)
EPA-2
TO-15
NO
0.20
ppb(v/v)
EPA-2
TO-15
ND
0.20
ppb(v/v)
EPA-2
TO-15
ND
0.20
ppb(v/v)
EPA-2
TO-15
ND
0.20
ppb(v/v)
EPA-2
TO-15
ND
0.20
ppb(v/v)
EPA-2
TO-15
ND
0.20
ppb(v/v)
EPA-2
TO-15
ND
0.20
ppb(v/v)
EPA.-2
TO-15
PERCENT
RECOVERY
RECOVERY
LIMITS
103
(70 - 130)
105
(70 - 130)
92
(70 - 130)
NOTE (S):
Calculations are performed before rounding to avoid round -off errors in calculated r=16.

13
LABORATORY CONTROL SAMPLE EVALUATION REPORT
GC/MS Volatiles
Client Lot #... : H7L280184 Work Order #-..: KE2DFIAC Matrix.........: AIR
LCS Lot -Sample#: HBA030000-222
Prep Date......: 01/02/08 Analysis Date..: 01/02/08
Prep Batch #.._: 8003222
Dilution Factor: 1
PARAMETER
1,1-Dichloroethene
Benzene
Trichloroethene
Toluene
Chlorobenzene
SURROGATE
1,2-Dichloroethane-d4
Toluene-d8
4-Bromofluorobenzene
PERCENT
RECOVERY
RECOVERY
LIMITS
METHOD
102
(70 - 130)
EPA-2 TO-15
92
(70 - 130)
EPA-2 TO-15
96
(70 - 130)
EPA-2 TO-15
82
(70 - 130)
EPA-2 TO-15
92
(70 - 130)
EPA-2 TO-15
PERCENT
RECOVERY
RECOVERY
LIMITS
104
(70 - 130)
103
(70 - 130)
101
(70 - 130)
NOTE (S):
Calculations are performed before rounding 10 avoid round -off errors in calculated results.
Bold print denotes control parameters

14
LABORATORY CONTROL SAMPLE DATA REPORT
GC/MS Volatiles
Client Lot #(:...: H7L280184 Work Order $...: KE2DFIAC Matrix.........: AIR
LCS Lot-Sample#t: HSA030000-222
Prep Date......: 01/02/08 Analysis Date..: 01/02/08
Prep Batch #k... : 8003222
Dilution Factor: 1
SPIKE
MEASURED
PERCENT
PARAMETER
AMOUNT
AMOUNT
UNITS
RECOVERY
METHOD
lrl-Dichloroethene
10.0
10.2
ppb(v/v)-
102
EPA-2
TO-15
Benzene
10.0
9.16
ppb(v/v)
92
EPA-2
TO-15
Trichloroethene
10.0
9.58
ppb(v/v)
96
EPA-2
TO -IS
Toluene
10.0
8.18
ppb(v/v)
82
EPA-2
TO-15
Chlorobenzene
10.0
9.19
ppb(v/v)
92
EPA-2
TO-15
PERCENT
RECOVERY
SURROGATE
RECOVERY
LIMITS
1,2-Dichloroethane-d4
104
(70 - 130)
Toluene-d8
103
(70 - 130)
4-Bromofluorobenzene
101
(70 - 130)
Calculations are performed before rounding to avoid round -off errors in calculated resul6.
Bold print denotes control parameters

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