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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 SAMPLINGI ELEVATION(a) WATER ELEVATION (b) (ug/L) (ug/L) 091L) (ug/L) (ug(L) (ug/L) (uglL) (ugrL) (ppm) MONITORING (Feet) (Feet) (Feet) MW-6 09115!93 13.56 8.98 4.58 400 - 2.4 ND<0.5 ND<0.5 ND<0.5 --- -- --- 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 NO<0.5 ND<0.5 --- - 4.2 PACE MW-6 10/07/94 13.56 9,72 3.84 ND<50 - ND<0.5 ND<0.5 ND<0.5 ND<0.5 --- - 4.3 PACE MW-6 12108'.34 13.56 9.88 3.68 300 - ND<0.5 ND<0.5 ND<0.5 ND<0.5 -- 4.6 PACE MW-6 02/21/95 13.56 7.60 5.96 990 - ND<0.50 ND<0.50 ND<0.50 ND<1.0 - 8.0 AT[ 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) 01/13/94 1427 - - MW-7 (e) 05/12194 14.27 - -- MW-7 (e) 10/07/94 14.27 - - - - - - - -- -- - MW-7 (e) 12/06/94 14.27 --- - - -- - - - - - MW-7 =21/95 14.27 8.21 6.06 ND<50 - ND<0.50 ND<0.50 ND<0.50 ND<1.0 --- - 6-9 ATi OC-2 (f) 05/17/93 - - - ND<50 - ND<05 ND<0.5 ND<0.5 ND<l.0 --- PACE OC-2 (f) 09/15/93 - - - ND<50 - ND<0.5 ND<0.5 ND<0.5 ND<0.5 - - PACE OC-2 (f) 01/12/94 - - - ND<50 - ND<0.5 ND<0.5 ND<0.5 ND<0.5 - - - PACE OC-2 (f) 05/12/94 - - - ND<50 --- ND<0.5 ND<0.5 ND<0.5 ND<0.5 -- - - PACE QC-2 (f) 10!07194 - - --- ND<50 - ND<0.5 ND<0.5 ND<0.5 ND<0.5 --- - - PACE OC-2 (f) 12/08/94 - - - 52 - 0.6 1.1 2.2 7.9 - - PACE OC-2 (f) 02x21/95 --- - - ND<50 -- ND<0.50 ND<0.50 ND<0.50 ND<1.0 - - ATI 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 cap UV-34 at Mathey Road,45 feel north and 52 feet west of centerline B Benzene (elevation of 12.50 feet above mean sea level.) T Toluene E Ethylbenzene (b) Groundwater elevations in feel 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 vary;see laboratory report. ug/L Micrograms per liter ppm Parts per million (e) Well inaccessible due to road consiruction/vehicular traffic. ND Not detected above reported detection limit Not analyzed/applicabialmeasured (f) Travet blank PACE Pace,Inc. ATI Analytical Technologies Inc. E:10110-151-3-3 10-Apr-95 PAGE