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r <br /> w <br /> Table 1. Groundwater Monitoring and Analytical Data <br /> Tosco Facility No 6981 <br /> 4707 Pacific Avenue <br /> Stockton, California <br /> Casing Depth to Floating Groun&ater <br /> Well Date Elevation' Liquid Product EleNation Methanol Ethanol TBA MTBE DiPE ETBE TAME <br /> ID Sampled (feet MSL) (feet) (feet) (feet MSI.) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) <br /> MW-1 Well paNed over <br /> MW-2 1218/97 1156 36 14 000 -2458 20 <1,700 <330 390 <6 7 <6 7 r6 7 <br /> MW-3 Well destroyed <br /> MW4 1218/97 1163 3574 000 -2411 <10 <500 <100 75 <2 0 <2 0 <2 0 <br /> MW-5 12/8/97 1176 3605 000 -2429 <1 0 <500 <100 43 <2 0 <2 0 <2 0 <br /> MW-6 12/8/97 1143 3565 000 -24 22 <1 0 <500 <100 <2 0 <2 0 <2 0 <2 0 <br /> MW-7 12/8/97 1182 3637 000 -24 55 <1 0 <500 <100 69 <2 0 <2 0 <2 0 <br /> MW-8 Well paved ober <br /> MW-9 12/8/97 1176 3578 000 -2402 <1 0 <500 <100 <2 0 <2 0 <2 0 <2 0 <br /> MW-10 Well destroyed <br /> MW-11 Well par ed of er <br /> MW-12 Well destro3ed <br /> MW-13 Well destro}ed <br /> VW-1 1218/97 ---- 3562 000 ---- <1 0 <500 <100 <2 0 <2 0 <2 0 <2 0 <br /> VW-2 Well connected to VES <br /> VW-3 12/8/97 ---- 3575 000 - <1 0 <500 <100 <2 0 <2 0 <2 0 <2 0 <br /> VW-4 Well connected to VES <br /> VW-5 Well connected to VES <br /> VW-6 Well connected to VES <br /> Trip Blank 12/8/97 ____ .w_ <10 <500 <100 <2 0 <2 0 <2 0 <2 0 <br /> Explanation, Analtvical Methods <br /> TBA=cert-butanol DIPE=di-isopropyl ether Ethanol,TBA,MTBE,DIPS,ETRE,TAME=EPA Method 8260 <br /> MTBE=methyl tert-butyl ether ETBE=ethyl tertbutyl ether Methanol=Industrial solvent Scan <br /> TAME=tert-amyl methyl ether ppb=parts per billion <br /> feet MSL=in feet, relative to mean sea level Laboratory <br /> ----=not available/not applicable Sequoia Analytical(FLAP#1210) <br /> ` Casing elevations from MPDS Report No UN6981-15,dated August 18, 1997 <br /> 785522 <br />