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<br /> 880 VICTOR, LODI
<br /> PAGE 2
<br /> 21 feet bsg), 0.26 ppm of Benzene (Tank 1 at 14.5 feet bsg), and 1.1 ppm, 1.7 ppm, and
<br /> 16 ppm of Toluene, Ethyl-benzene, and Xylenes, respectively (Tank 2 at 18.5 feet bsg).
<br /> Methyl Tert-Butyl Ether (MTBE) analysis was not conducted.
<br /> One soil sample was taken at 33 feet bsg beneath the existing east UST in an angle
<br /> boring by Enviros, Inc. on February 22, 1996. According to Soil Boring Installation
<br /> Report dated May 8, 1996 prepared by Enviros, Inc., analytical results of the soil sample
<br /> were 29 ppm of MTBE, and were non-detect for TPH-g and BTEX.
<br /> PHS/EHD has received Site Investigation Report dated June 9, 1999 prepared by
<br /> Cambria Environmental Technology, Inc. (Cambria):
<br /> • Five borings were advanced in the vicinity of the former UST area on January 14,
<br /> 1999 and January 15, 1999 by Cambria. Groundwater was encountered at
<br /> approximately 50 bsg.
<br /> • Both soil and grab water samples were collected in Soil Boring#3 (SB-3) and SB-4
<br /> for laboratory analyses.
<br /> • Only soil samples were collected in SB-1, SB-2, and SB-5 for laboratory analyses.
<br /> • Analytical results of the grab water sample collected from SB-3 were 46,000 parts
<br /> per billion (ppb) of TPH-g, 243 ppb of Benzene, 2,270 ppb of Toluene, 1,380 ppb
<br /> of Ethylbenzene, 13,900 ppb of Xylenes, and 28,000 ppb of MTBE. Analytical
<br /> results of the grab water sample collected from SB-4 were 6,610 ppb of TPH-g, 63.6
<br /> ppb, 85.5 ppb, 200 ppb, and 1,240 ppb of BTEX, respectively, and 8,050 ppb of
<br /> MTBE. These results are above the California Primary Maximum Contaminant
<br /> Levels (MCL) for public drinking water of 1 ppb for Benzene, 1000 ppb Toluene,
<br /> 680 ppb Ethylbenzene, 1,750, ppb Xylenes, and the public health goal of 13 ppb for
<br /> MTBE.
<br /> • Laboratory analyses of the soil samples from all five borings taken from various
<br /> depths ranging between 22 feet bsg to 60 feet bsg revealed minimal concentrations
<br /> of TPH-g and BTEX. However, analytical result of soil sample taken from SB-1 at
<br /> 25 feet bsg was 92.9 ppm of MTBE. MTBE was also detected in laboratory analysis
<br /> of soil samples taken at and beneath the water table. Analytical results of the soil
<br /> sample taken from SB-3 at 50 feet bsg was 2.36 ppm of MTBE, and at 56 feet bsg
<br /> 0.135 ppm of MTBE. Analytical results of the soil sample taken from SB-4 at 50
<br /> feet bsg was 0.507 ppm of MTBE, and at 60 feet bsg 0.459 ppm of MTBE.
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