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!.01 1WW File No. 20-3937-01 �� KLEIN FELDER September 3, 1996 6.2 SOIL ASSESSMENT In general, concentrations of the analytes in the 19 samples tested ranged as follows. Where noted below ND indicates none detected at the detection limit noted. • TPH-G [ND (<1.0 mg/kg) to 4.1 mg/kg] • Benzene [ND (<0.0050 mg/kg)] LE 0 ToluCnC [ND (<0.0050 nig/kg)] • Ethylbenzene [ND (<0.0050 mg/kg) to 0.0091 mg/kg] • Total Xylenes [ND (<0.0050 mg/kg) to 0.026 mg/kg] • UEH [ND (<1.0 mg/kg)] • TPH-K [ND (<1.0 mg/kg)] • TPH-D [ND (<1.0 mg/kg)] Lo TPI 1-1,0 [ND (<2.0 mg/kg)] • TPI I-.1P4 [ND (<1.0 mg/kg)] • TPH-.1P5 [ND (<1.0 mg/kg)] Othcr EPA 8260 Compounds [ND] • Sulfate [ND(<50 mg/kg) to 290 mg/kg] Hydrocarbons were detected in two of the nineteen soil samples which were chemically analyzed. The sample obtained from 6-1/2 feet in boring B-2 {monitoring well MW-2) contained 0.0091 mg/kg ethylbenzene and 4.1 mg/kg TPH-Gas. Boring B-2 (monitoring well MW-2), was located just south of the northern property line (near the former U. S. Chemical pond). Both of the concentrations attenuated to non-detectable levels by a depth of 11-1/2 feet. The concentrations present appear to be indicative of a limited surface spill of gasoline. Because of the low levels present, and the shallow extent of the hydrocarbons, Kleinfelder recommends no further investigation or clean-up by Schaeffer. However, regulatory concurrence should be �.. obtained from either the RWQCB and/or the PHS/EHD. A concentration of 0.026 mg/kg of xylenes were present in the soil sample obtained from a depth of 61 feet in boring B-3 (monitoring well MW-3). Boring B-3 (monitoring well MW-2), is located within approximately 25 feet of the Bobcat Central pond (up-gradient). No detectable hydrocarbons were present in the soil samples obtained from 6', 11', 26', 41' and 56' in the same boring. This may be explained by the fact that the 61 foot sample was actually below the stabilized water surface in the completed well. Therefore, the hydrocarbons may be indicative of hydrocarbons being transported in groundwater that adsorbed to the soil. Because it does not appear that these hydrocarbons originated on the proposed Schaeffer site, Kleinfelder does not recommend any further investigation or clean-up by Schaeffer. However, regulatory concurrence should be obtained from either the RWQCB and/or the PHS/EHD. Asbestos was not detected in any of the four surface soil samples obtained near the railroad tracks at the northern edge of the site. 2I1-3937-011MR960189 Page 14 of 18 01996, Kleinfelder, Inc.