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Table 1 Summary of Soil Sampling Re: Over-Excavtion of Former Heavy Oil Tank San Joaquin Regional Transit District Southwest Corner of Channel and California Streets Stockton,California Sample Sample Sample TRPH TPH-D TPH-MO TPH-G Volatile PCBs Sampler Sample T e/Location 5 Oxygenates(1) Cadmium Total Chrome VI Nickel Zinc Lead Location Number Date Depth P YP (mg/kg) (mg/kg) (mg/kg) (mg/kg) Organics 0EPA EPA 8260 EPA 8082 (mg/kg) Chromium (mg/kg) (mg/kg) (mg/kg) (mg/kg) (feet) EPA 418.1 (µg/kg) (mom) T21-2' 27738 04/18/05 2 Initial Sample 7,100 ND <1.0 ND <5 ND <0.2 ND ND ND <33 0.100 16.8 ND <O.10 18.8 37.9 20.8 T2B-15' 31191 15 Bottorr/Confirmation 2,200 ND <1.0 ND <5 ND <0.2 ND ND ND <33 0.150 22.0 ND <O.10 23.7 30.4 5.4 T2ET-7' 31191 7 450 ** ** •* •• •• ** ND <O.1 24.0 ND <O.10 26.6 23.4 1 5.55 T2NET-T 31191 04/19/05 7 Trench/Exploration 800 ss ss ss ss •• ** ND <O.1 19.6 ND <O.10 28.6 24.4 5.55 T2WT-6' 31191 6 470 ** ** ** •* ** •* ND <O.1 24.1 ND <O.10 33.0 28.5 6.50 T2NSW-12' 31191 12 Sidewall Confirmation 850 ** *• ** ** ** ND <O.1 27.4 ND <O.10 33.1 34.2 6.35 T2SSW-10' 31191 10 2,000 ** *• *• ** ** ** ND <O.1 26.2 ND <O.10 28.4 32.2 7.40 SSWA-8' 34921 8 6200 Sidewall Confirmation ESW-8' 34918 8 110 ** ss ss ss ss ss ss s: ss ss ss 04/21/05 Bench, SBEN-13' ss ss ss ss ss ss *s ss ss ss ss ss 34920 13 Bottom/Confirmation 70 T2B2-20' 34938 20 Bottom/Confirmation 190 ** ** *• •• •* ** ** *• ** •• •• ** Notes: mg/kg =milligams per kilogram(parts per million) pg/kg =milligrams per kilogram(parts per billion) ND =not detected at or above laboratory reporting limits TPH-G =total petroleum hydrocarbons as referenced to gasoline - TPH-D =total petroleum hydrocarbons as referenced to diesel TPH-MO =total petroleum hydrocarbons as referenced to motor oil (1) =MTBE,TBA,DIPE,TAME,ETBE • 37260.T0.3/ST02E- CopyriaM 2003.KleiMelaer,Inc. page T t NovemCer 20,2003