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TABLE 1-SUMMARY OF RESULTS OF GROUNDWATER SAMPLING ~ BP OIL COMPANY SERVICE STATION NO.11192 1403 COUNTRY CLUB BOULEVARD,STOCKTON,CALIFORNIA ALISTO PROJECT NO.10-037 WELL DATE OF CASING DEPTH TO GROUNDWATER TPH-G B T E X MTBE DO LAB ID SAMPLING/ ELEVATION (a) WATER ELEVATION (b) (ugn) (4) (ug/1) (UP 00 (ugll) (ppm) MONITORING (Feet) (Feet) (Feet) VW-2 12/09/92 - DRY - -_ VW-2 03/11/93 --- DRY --- - VW-2 0£/15/93 --- DRY - - - -- -- _ VW-2 09/15/93 --- DRY --- _-_ _ VW-2 12122!93 --- __ - VW-2 02/15/95 --- -_ MW-1 05/01/90 5.52 25.11 -19.59 140 1 ND ND NDPRE MW-1 08/05/91 5.52 DRY --- -- --- -- - - - PRE MW-1 12/09/91 5.52 DRY --- -- -- -- - - _ T PRE MW-1 03/09/92 5.52 DRY -- --- --- ---mW- w PRE -- 1 06/19/92 5.52 DRY --- --- --- --- ANA MW-1 09/18192 5.52 DRY --- --- -- - - - - M ANA MW-1 (c) 12/09/92 5.52 DRY - - -- - - ANA MW-1 02/15/95 5.52 --- --- ANA MW-1 04/21/95 5.52 23.82 -18.30 820 27 2.6 3.1 5.6 4.5 ATI QC-1 (d) 04/21/95 --- 720 31 2.9 3.5 5.7 -- ATI MW-1 07/19/95 5.52 22.92 -17.40 620 40 2 2.4 2.3 --- 5.2 ATI MW-1 (e) 10/20/95 5.52 23.32 -17.80 440 16 0.51 0.73 2.2 6.4 4.7 ATI QCA (d)(e) 10/20/95 -- --- --- 480 17 ND<0.50 ND<0.50 1.5 ND<5.0 --- ATI MW-1 10/20195 - - - 450 30 0.67 0.60 1.0 5.3 4.4 ATI QC-1 (d) 10/20/95 --- --- --- 460 29 0.91 0.52 1.5 ND<5.0 --- ATI MW-1 (e) 04/23/96 5.52 19.87 -14.35 ND<500 11 ND<0.5 ND<0.5 ND<0.5 49 - SPL MW-1 04/23/96 5.52 - -- ND<5W 10 ND<0.5 ND<0.5 ND<0.5 42 - SPL MW-1 07/12/96 5.522 20.99 -15.47 --- --- MW-1 10/18/96 5.52 20.16 -14.64 160 ND<0.5 ND<1.0 ND<1.0 ND<1.0 ND<10 5.3 SPL MW-1 02/26/98 5.52 11.90 -6.38 470 1.6 ND<1.0 ND<1.0 ND<1.0 370 4.8 SPL MW-1 07/07/98 5.52 11.40 -5.88 800 ND<0.5 ND<1.0 ND<1.0 ND<1.0 700 3.6 SPL MW-1 10/28/98 5.52 13.66 -8.14 -- --- --- MW-2 05/01/90 5.96 25.23 --- ND ND ND ND ND -- - PRE 94-Nnv-9R PA(;F 1