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TABLE 1-SUMMARY OF RESULTS OF GROUNDWATER SAMPLING BP OIL COMPANY SERVICE STATION NO.11195 16500 SOUTH INTERSTATE 1-5,LATHROP,CALIFORNIA ALISTO PROJECT NO.10-151 WELL DATE OF CASING DEPTH TO GROUNDWATER TPH-G TPH-D B T E X TOG HVOCs DO LAB ID SAMPLING( ELEVATION (a) WATER ELEVATION (b) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (ppm) MONITORING (Feet) (Feet) (Feet) MW-6 09/15/93 13.56 8.98 4.58 400 2.4 ND<0.5 ND<0.5 ND<o.5 - - PACE MW-6 01/12/94 13.56 9.62 3.94 670 ND<0.5 ND<0.5 ND<0.5 ND<0.5 - 4.1 PACE MW-6 05/12/94 13.56 8.95 4.61 5500 - ND<0.5 ND<0.5 ND<0.5 ND<0.5 - --- 4.2 PACE MW-7 09/15/93 1427 9.59 4.68 ND<50 - ND<0.5 ND<0.5 ND<0-5 ND<0-5 - - --- PACE MW-7 (e) 01113'94 14.27 -- - - MW-7 (e) 05/12/94 14.27 OC-2 (f) 05117!93 - - - ND<50 - ND<0.5 ND<0.5 ND<0.5 ND<1.0 - -- -- PACE QG-2 (f) 09/15193 - - - ND<50 - ND<0.5 ND<0.5 ND<0.5 ND<0.5 - -- - PACE QC-2 (1) 01/12/94 - - - ND<W - ND<0.5 ND<0.5 ND<0.5 ND<0.5 - -- --- PACE QC-2 (f) 05/12194 - - - ND<50 -- ND<0.5 ND<0.5 ND<0.5 ND<0.5 - --- --- PACE ABBREVIATIONS: NOTES: TPH-G Total petroleum hydrocarbons as gasoline (a) Top of casing elevations surveyed in reference to San Joaquin datum, TPH-D Total petroleum hydrocarbons as diesel brass rap UV-34 at Mathey Road,45 feet north and 52 feel west of centerline B Benzene (elevation of 12.50 feet above mean sea level.) T Toluene E Ethylbenzene (b) Groundwater elevations in feet above mean sea level. X Total xylenes TOG Total oil and grease (c) Blind duplicate. HVOCS Halogenated volatile organic compounds DO Dissolved oxygen (d) Detection limits very(see laboratory report). ppb Parts per billion PPM Parts per million (6) Well inaccessible due to road construction. ND Not detected above reported detection limit Not anslyzed/applicable/measured (1) Travel blank, PACE Pace,Inc. 05-Aug-94 PAGE 2