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Sunland Gasoline March 14, 2000 2085 Fremont Street, Stockton, California Page 5 Report of Findings, Site Characterization The oxygenates Di-isopropyl Ether (DEPE), Ethyl tertiary-Butyl Ether (ETBE) and tertiary-Amyl Methyl Ether (TATE) were not detected in any sample above the reporting limits. The reporting limits were elevated due to the high levels of contaminates present in the samples, therefore it is possible that these constituents exist in the soils underlying the site at levels below the minimum detectable levels set by the laboratory. 4.2 Boring B-2 - Soil Analytical Data The laboratory data irom B-2 indicate that a low level of soil contamination exists in the vicinity of boring B-2. TPH-G contamination is present.throughout the soil column. Benzene contamination is only found in the 30' sample. MTBE is only found in the 25' and 30' samples. No other oxygenates were identified_ by laboratory analysis. Table 2 provides a summary of the laboratory analytical data for B-2. The laboratory data and Chain of Custody Reports can be found in Appendix C. Table 2: B-2 Soil Analytical Data Sample ID TPH-G ! Benzene I Toluene E-Benzene X lenes MTBE B-2 5' 33(} ND '�a. ::.: x,540 ?0. .. ND B-2 10' :...;I ND I .� :...... ND ND B-2 15' I ND ND I ND _ .; ND B-2 20' ! ND ND _.. 13Q.:: .. ND B-2 25' ! ND ND 7 .. . ... _ MEMO B-2 30' 2 7....... ......::._ $:. 3�0;,.... ..:: ... .?$.,.. .: 38 .. .:.: 43......:. Units: mg/Kg-TPH-G; ug/Kg--BTEX,MTBE "ND" -None Detected at or above the reporting limits 4.3 Boring B-.l — Groundwater Analytical Data The groundwater underlies this site at approximately fifty-eight feet (58') below ground level (b.g.l.). During the water sample collection process, the water in the boring rose to approximately forty-seven feet (47') b.g.l. The water sample did not contain any oxygenates except MTBE. A summary of the analytical findings is presented in Table 3. f �