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<br /> Sunland Gasoline March 14, 2000
<br /> 2085 Fremont Street, Stockton, California Page 4
<br /> Report of Findings, Site Characterization
<br /> (' r ;1
<br /> 3. 3 Groundwater Sampling
<br /> The groundwater sample was collected using a hydro-punch type device.
<br /> Groundwater samples collected for analysis were analyzed using EPA method
<br /> 5030/LUFT for gasoline petroleum hydrocarbons, EPA method 8020 for BTEX,
<br /> and EPA method 8260 for fuel oxygenates.
<br /> 4. 0 Analytical Results
<br /> The analytical results were completed on March 7, 2000 . Wff received and reviewed the
<br /> results on March 10, 2000 . The conditions found in the soil and groundwater at the time
<br /> of this field investigation, as depicted by soil and groundwater analytical data collected
<br /> from B - 1 and B-2, are found below.
<br /> 4. 1 Boring B-1 - Soil Analytical Data
<br /> The results from this boring indicate that soil contamination in the form of Total
<br /> Petroleum Hydrocarbons as Gasoline (TPH-G), BTEX, MTBE, Ethanol, and
<br /> tertiary Butanol exist in the subsurface underlying this site. Table 1 provides a
<br /> summary of the laboratory findings for boring B- 1 . The analytical data and Chain
<br /> of Custody is provided in Appendix C.
<br /> Table 1 : B4 Soil Analytical Data M
<br /> Sample ID TPA-G Benzene Toluene E-Benzene Xylenes MTBE Ethanol t-Butanol
<br /> B - 1 10 ' ND ND ND ND ND ND ND 62a
<br /> B- 1 15 ' la,D06 1 ,SOa 650,000 340,000 1 700,000 9 ,600 ND ND
<br /> B- 1 20 ' 4,400 : 3 ,600 200,000 100, 000 510, 009 36jOO ; ND ND
<br /> B- 1 25 ' 3 ,600 4,000 180,000 88,000 400, 000 51,000 .:: ND ND
<br /> B- 1 30 ' 1 ,70000 85,0.90 38000 190 ,040 11000 ND ND
<br /> B - 1 35 ' 31800 : 11 ,000 220,000 76,000 3%0,060 ND 7,500 . :; ND
<br /> B- 1 403 ,600 32,000' 230,004 73, 060 366 , 000 ND 33000 ND
<br /> B - 1 A511 50a 15,000 87,000 191000 140,000 ND ND ND
<br /> 13 - 1 50 ' 810 5, 400 ` 26,000 1'1000 50,000 ND ND ND
<br /> B- 1 55 85 . 750 14,006 1 ,600 8,600 ND ND ND -
<br /> B- 1 60 ' ND 170 20 2D 69 ND 29x000 __ ND
<br /> B- 1 65 ' ND ND 9.2 ND 10 62 ND ND
<br /> B - 1 70 ' 73 32 510 180 590 :: ND ND ND
<br /> B- 1
<br /> 75 1 8 ND 440 66 310 ND ND ND
<br /> B- 1 80' ND 1Q 36 ND 27 ;' ND ND ND
<br /> Units: mg(Kg - TPH-G; ug/Kg - BTEX, MTBE, Ethanol, t-Butanol
<br /> "ND" - None Detected at or above the reporting limits
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