22047_University Place Mall_RA-732_5371_RP_1990

Westinghouse Environmental
and Geotechnical Services, Inc.
3500-B Regency Parkway
P.O. Box 1308
April 5, 1990 Cary, North Carolina 27512
[phone]
FAX [phone]
North Carolina Division of Environmental Management
Department of Environment,IHealth and Natural Resources
Groundwater Section
Raleigh, Regional Office
3800 Barrett Drive
Raleigh, North Carolina 27611
Attention: Tom Will
F
Reference: Village Texaco
Chapel Hilly North Carolina
Westinghouse Project No. 4114-89-444
Dear Mr. Will:
The following letter 'report is in response to correspondence addressed to
Mr. John Lancaster with Star Enterprise from the Raleigh Regional Office of the
DEM concerning a suspected UST release discovered and reported during tank
removal activity at the above referenced site. The DEM has requested additional
information to satisfy 40CFR 280.62 through 280.65 reporting requirements. This
report follows the format of Part 280 with the applicable subsections.
INTRODUCTION
On October 24, 1989 existing underground gasoline storage tanks located at
Village Texaco in Chapel Hill were removed for replacement with new underground
fiberglass tanks. In addition, a waste oil tank and a heating fuel tank were
also removed. During the excavation of these tanks, hydrocarbon contamined soil
was encountered and subsequently disposed off -site. Total petroleum hydrocarbons
in soil samples obtained at the end of excavation activity indicated the
A Westinghouse Electric Corporation subsidiary.

Mr. Will
April 5, 1990
Page 2
excavation limits were under the 10 ppm (parts per million) DEM soil removal
guideline. The tank pit was backfilled and monitor wells were installed in the
new tank pit excavation. The site location is shown in the vicinity map on
Figure 1. The location of the closed tank pit is shown on Figure 2.
280.62 Initial Abatement Measures and Site Check Underground Gasoline Tanks:
1. The tank contents were removed by Noble Oil Company prior to tank removal.
Inventory records did not indicate a loss of product.
2_ Contaminated soil was excavated from the tank pit and surrounding area and
was loaded into trucks for proper off -site disposal. Water present in the
excavation was pumped out and placed in drums and disposed off -site.
3. When hydrocarbon saturated soils were encountered, the excavation was
covered to prevent the escape of dangerous fumes and ambient air space
monitoring was performed using an HNu organic vapor analyzer during
additional soil and tank removal..
4. Forty truck -loads of soil were removed from the excavation and hauled to
Lee Brick in Sanford, North Carolina for final disposal.
5. Contaminated soils were removed from the excavation until HNu scanning
measurements measured under 10 parts per million (ppm). Three composite
soil total petroleum hydrocarbon samples were then obtained from the
excavation sidewalls and floor. Sample TP-1 was obtained from the north
and east sidewalls, sample TP-2 was obtained form the south and west
sidewalls and sample TP-3 was obtained from the tank pit bottom. The

Mr. Will
April 5, 1990
Page 3
samples were analyzed'by Chemical & Environmental Technology, Inc. for low
fraction hydrocarbons using test method 5030. Analytical results indicated
the respective concentrations of gasoline in TP-1, TP-2 and TP-3 were 1.37
mg/kg, 0.80 mg/kg and C0.01 mg/kg (ppm). These results are below the DEM's
action level of 10 ppm for soils contaminated by petroleum hydrocarbons.
Laboratory report forms are included in Attachment A. The final extent of
the excavation with the excavation depth is shown in Figure 2.
Following the completion of soil sampling, the UST excavation was backfilled
with pea gravel and the new fiberglass tanks were installed in an excavation
located approximately 20 feet north of the closed tank pit. Four four -
inch ID monitor wells were installed in the new tank pit in order to comply
with leak detection monitoring as required in 40 CFR 280. These wells are
identified in this report as VP-1 through VP-4 and are shown in Figure 2.
6. The tank pit monitoring wells VP-1 through VP-4 were monitored for free
product with an oil -water interface probe on February 28, 1990. Free
product was not detected and the average depth to water measured
approximately 10 feet below ground surface (BGS).
280.63 Initial Site Characterization
1. Laboratory analytical results from soil sampling and field observations
indicate a release of gasoline has occurred. The amount of release is not
known as inventory records did not indicate a shortage and the excavated
tanks and product lines did not exhibit obvious leaks.

Mr. Will
April 5, 1990
Page 4
2. Surrounding Po ulation and Land use: The site is located in an area of
Chapel Hill zoned commerical and residential. A minimum of two apartment
complexes and two housing developments are located within a quarter mile
radius of the facility. University Mall is located adjacent to the site
and other retail facilities are located within the quarter mile radius.
Water Quality and Use:
The residential areas and commercial facilities located adjacent to the site
are serviced by a public water supply. A-wellrecords search and drive -by
reconnaissance was performed in order to locate potable water wells in the site
vicinity. No water wells were located in the reconnaissance; however, a water
well completion record was obtained for a deep (225'BGS) drilled well located
at University Mall. This well was installed in 1977 for lawn and shrub watering.
A copy of the well completion record is in Attachment B.
Location of Subsurface Sewers:
A site reconnaissance was performed in order to locate the water line
sanitary and storm sewers. Portions of these water lines were located and are
shown on Figure 2.
Climatolo ical Conditions:
The Chapel Hill area is located'in a relatively mild, humid region in the
North-Central Piedmont of North Carolina. The average low temperature during
winter months is 31°F, with average high temperature of 53°F. During the summer,
the average low temperature is 65°F, with average high temperatures of 88°F.
Rainfall is heaviest during July and August; annual precipitation averages about
43 inches per year. 0

Mr. Will
April 5, 1990
Page 5
Subsurface Soil Conditionsi:
The site lies in the floodplain of Bolin Creek which eventually drains into
B. Everett Jordan Lake. The site subsurface is composed of alluvial sediments
with associated organic material resting on Triassic sediments of the Sanford
formation. A hand augered soil boring advanced in a location adjacent to the
tank pit encountered grey to red -brown silty clay -clayey silt to 13'BGS with a
grey, fine to medium grained sand underlying the silt/clay. Water is present
in the sand.
40 CFR 280.64
Oil -water measurements taken in VP-1 through VP-4 did not detect a
measurable product thickness.
40 CFR 280.65 Investigations for Soil and Groundwater Cleanup*
As requested by the DEM, the two monitor wells closest to the closed tank
pit, VP-1 and VP-2 weresampled for gasoline constituents. Sampling was
performed on March 6, 1989 using laboratory decontaminated teflon bailers and
new nylon rope. Prior to sampling, the wells were bailed until dryness to remove
stagnant water. The water samples were collected without headspace in 40 ml
vials and sealed with Teflon -lined septum caps. The samples were labeled, logged
onto a chain -of -custody form and stored and transported in and insulated cooler
containing wet ice. Custody of the samples was maintained by Westinghouse until
delivery to the analytical laboratory. The water samples were analyzed by
Industrial & Environmental Analysts, Inc. of Research Triangle Park, North
Carolina for Class I Petroleum Products consisting of EPA-624 compounds, ethylene
dibromide (EDB) methyl -tertiary butyl ether (MTBE) and isopropyl ether.
ro.

I -'
Mr. Will
April 5, 1990
Page 6
The following table summarizes the laboratory analytical results.
Co�nd VP -LA o"2a:=.:..:r:' VP-2A
Benzene
BQL (100)
0CY)
2200
Ethyl benzene
S 100 BQL
( )
"'-�`�N )
2000
Toluene
BQL (100)
D.:��
1�'xi7`x:.';'
16,000
MTBE
180
���
d�-,J'
2,300
Analytical results are in µg/L (parts per billion)
SQL (100) - Below quantitation limit of 100µg/L
Isopropyl ether, ethylene dibromide and the remainder of the EPA-624
compounds were not detected, however, the quantitation limits of each compound
were elevated due to the high concentration of the target compounds. Laboratory
analytical results are included in Attachment C.
We trust this report supplies the information requested by DEM. If you have
any questions or comments please contact us.
JMS/MSW/tn
Sincerely,
WESTINGHOUSE ENVIRONMENTAL AND
GEOTECHNICAL SERVICES, INC.
J mes M. Stahling, P.G.
Staff Geologist
Mark S. West ay
Senior Scientist
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VILLAGE TEXACO W Westinghouse JOB NO- 4114-89- 444
15-501 BYPASS F1 G. NO: I
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---LI.MITS OF UNDERGROUND
STORAGE TANK EXCAVATION
KEY:
m MONITOR WELL
CH0 CATCH BASIN
WATER/SEWER LINE
PRO.IFrT
VILLAGE TEXACO
15 501 BYPASS
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F1G. NO' 2 0

ATTACHMENT A

Chemical & Environmental Technology, Inc.
ITE
ENVIRONMENTAL LABORATORY SERVICES
JOHN M. OGLE P. O. BOX 12298
PRESIDENT RESEARCH TRIANGLE PARK. N. C. 27709
PHONE [phone]
FAX [phone]
NOVEMBER 1, 1989
MR. MARK WESTRAY
WESTINGHOUSE ENVIRONMENTAL
& GEOTECHNICAL SERVICES
PO BOX 1308
CARY, NC 27512
6 ;fit
RE: PO #03084
TEXACO
4114-89-444
*48--HOUR TURNAROUND*
"
SAMPLE HISTORY
CLIENT ID
CET SAMPLE DATE RECEIVED
DATE ANALYZED
TP-1
31591.
10-30-89
10-31-89
TP-2
31592
10-30-89
10-31-89
TP-3
31593
10-30-89
10-31-89
ANALYTICAL RESULTS
PARAMETER
METHOD-1 TP-1
TP-2 TP-3
HYDROCARBON,LOW,
mg/kg
5030 1.37 (2)
0.80 (2) <0.01
1 -- "GUIDELINES FOR ADDRESSING FUEL LEAKS", CALIFORNIA WATER QUALITY
CONTROL BOARD, SEPTEMBER, 1985
2 - HYDROCARBONS IDENTIFIED AS GASOLINE
C E CAL & ENVIRONMENTAL TECHNOLOGY, INC
0 N E. BAUR
R ANIC CHEMIST
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ATTACHMENT C

Industrial & Environmental Analysts, Inc.
► w • P.O. sox 12846 _
Research Triangle Park, North Carolina 27709
[phone]
FAX (919) 677-Q427
March 21, 1990
Jim Stahling
Westinghouse Env. & Geotechnical Services, Inc.
P.O. Box 1308
Cary, NC 27512
Reference IEA Report No.: 115413
Project I.D.: 4114-89-444
Dear Mr. Stahling,
Transmitted herewith are the results of analyses on four samples submitted
to our laboratory.
Please see the enclosed reports for your results.
Very truly yours,
INDUSTRIAL & ENVIRONMENTAL ANALYSTS, INC.
Lin a F. Mitchell
Director, Technical Support Services
State Certification:
Alabama - #40210 New Jersey - #67719 South Carolina - #99021
Georgia - #816 Tennessee - #00296 North Carolina - #37720
Kansas - #E-158 Virginia - #00179 #84

GC/MS PURGEABLES
EPA METHOD 624 COMPOUNDS
IEA Sample Number: 115-413-1
Sample
Identification: VP-lA
Date Analyzed: 03/15/90
By: Stephenson
Quantitation
Results
Limit Concentration
Number
Compound
(ug/L)
(ug/L)
1
Benzene
100
BQL
2
Bromodichloromethane
100
BQL
3
Bromoform
100
BQL
4
Bromomethane
200
BQL
5
Carbon tetrachloride
100
BQL
6
Chlorobenzene
100
BQL
7
Chloroethane
200
BQL
8
2-Chloroethylvinyl ether
100
BQL
9
Chloroform
100
BQL
10
chloromethane
200
BQL
11
Dibromochloromethane
100
BQL
12
1,2-Dichlorobenzene
100
BQL
13
1,3-Dichlorobenzene
100
BQL
14
1,4-Dichlorobenzene
100
BQL
15
1,1-Dichloroethane
100
BQL
16
1,2-Dichloroethane
100
BQL
17
1,1-Dichloroethene
100
BQL
18
1,2-Dichloroethene (total)
100
BQL
19
1,2-Dichloropropane
100
BQL
20
cis-1,3-Dichloropropene
100
BQL
21
trans-1,3-Dichloropropene
100
BQL
22
Ethylbenzene
100
BQL
23
Methylene chloride
100
BQL
24
1,1,2,2-Tetrachloroethane
100
BQL
25
Tetrachloroethene
100
BQL
26
Toluene
100
BQL
27
1,1,1-Trichloroethane
100
BQL
28
1,1,2-Trichloroethane
100
BQL
29
Trichloroethane
100
BQL
30
Trichlorofluoromethane
100
BQL
31
Vinyl Chloride
200
BQL
Methyl-tert-butyl-ether
100
180
Isopropyl ether
100
BQL
Comments:
BQL = Below Quantitation Limit
Quantitation limit elevated due to sample dilution prior to analysis.
Sample diluted due to high concentration of target compounds present.
FORM 624 Rev. 030190

m
GC/MS PURGEABLES
EPA METHOD 624 COMPOUNDS
IEA Sample Number: 115-413-3
Sample
Identification: VP-2A
Date Analyzed: 03/15/90
By: Stephenson
Quantitation
Results
Limit
Concentration
Number
compound
(ug/L)
(ug/L)
1
Benzene
500
2200
2
Bromodichloromethane
500
BQL
3
Bromoform
500
BQL
4
Bromomethane
1000
SQL
5
Carbon tetrachloride
500
BQL
6
chlorobenzene
500
BQL
7
Chloroethane
1000
BQL
8
2-Chloroethylvinyl ether
500
BQL
9
Chloroform
500
BQL
10
Chloromethane
1000
BQL
11
Dibromochloromethane
500
BQL
12
1,2-Dichlorobenzene
500
BQL
13
1,3-Dichlorobenzene
500
BQL
14
1,4-Dichlorobenzene
500
BQL
15
1,1-Dichloroethane
500
BQL
16
1,2--Dichloroethane
500
BQL
17
1,1-Dichloroethene
500
BQL
18
1,2-Dichloroethene (total)
500
BQL
19
1,2-Dichloropropene
500
BQL
20
cis-1,3-Dichloropropene
500
BQL
21
trans-1,3-Dichloropropene
500
BQL
22
Ethylbenzene
500
2000
23
Methylene'chloride
500
BQL
24
1,1,2,2-Tetrachloroethane
500
BQL
25
Tetrachloroethene
500
BQL
26
Toluene
500
16,000
27
1,1,1-Trichloroethane
500
BQL
28
1,1,2--Trichloroethane
500
BQL
29
Trichloroethene
500
BQL
30
Trichlorofluoromethane
500
BQL
31
Vinyl Chloride
1000
BQL
Methyl -text -butyl -ether
500
2300
Isopropyl ether
500
BQL
Comments:
BQL = Below Quantitation Limit
Quantitation limit elevated due to sample dilution prior to analysis.
Sample diluted due to high concentration of target compounds present.
FORM 624 Rev. 030190

IEA LABORATORY RESULTS
IEA Project #: 115-413
Client Name: Westinghouse Env. & Geotechnical Services
Date
Sample # Client ID Parameter Results Analyzed
2 VP-1B Ethylene Dibromide c0.20 ug/L* 03/16/90
4 VP-2B Ethylene Dibromide c2.0 ug/L* 03/16/90
*Quantitation limit, elevated due to sample dilution prior to analysis.
Sample diluted due to the presence of non -target compounds.

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