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TABLE 1-SUMMARY OF RESULTS OF GROUNDWATER SAMPLING USING EPA METHOD 8020A BP OIL COMPANY SERVICE STATION NO.11195 16500 SOUTH INTERSTATE 5,LATHROP,CALIFORNIA ALISTO PROJECT NO.10-151 I WE.L DATE OF CASING DEPTHTO GROUNDWATER TPH-G TPH-D B T E x MTBE TOG HVOCs DO LAB ID SAMPLING/ ELEVATION (a} WATER ELEVATION (b) (ugA) (u,yl) (ugA} (ugA} (ugA) (ugA) (u94) (uglf) (ugA) (ppm) MONITORING (Feet) (Feet) (Feet) MW-1 12!21192 9.10 11.18 -2.08 ND<50 -- ND<O.5 ND<0.5 ND<0.5 NDcO.5 -- -- -- - PACE MW-1 05117193 9.10 8.41 0.69 ND<50 --- N00.5 ND<0.5 0.6 21 -- •- PACE MW-1 09115!93 9.10 9.76 -0.68 ND-50 --- ND4.5 ND<0.5 N0<0.5 ND<O.5 -- --- - - PACE MW-1 0111254 9.10 10.49 -1.39 NO<50 -- ND<0.5 ND<o.5 ND<0.5 ND<o.5 3.7 PACE MW-1 05/12/94 9.10 9.77 .0,67 ND<50 - ND<O5 NO<0.5 ND<0.5 ND<O.5 - -- - 4.0 PACE MW-1 10/07/94 9.10 10.54 -1.44 ND<50 --- ND<0.5 ND<0.5 ND<0.5 ND<O,5 -- »• -_ 3.9 PACE MW-1 12/06/94 9.10 10.75 -1.65 1300 --- 0.8 2.4 ND<0.5 ND<0,5 -- •-• - 4.1 PACE MW-1 02721/95 9.10 8.44 0.66 69 - ND<OSO NDc0.50 NO.O.50 ND<1.0 (CJ -- - 8.2 ATI MW-t 06709195 9.10 7.94 1.16 ••• MW-1 06/31195 9,10 9.61 -0.71 91 -- 0,70 ND<0.50 ND<0.50 NO<1.0 200 - 8.5 ATI mW -1 11102/95 9.10 10.38 •128 --- MW-1 02/28/96 9.10 6,98 2.12 ND<50 - ND45 ND MW-1 09105/96 9.10 9.31 -0.21 NO<50 - ND<0.5 ND<7.0 ND<1.0 ND<1.0 ND<10 -- - 7.7 SPL MW-1 03/25/97 9,10 6,47 2.63 ND<50 ND<0.5 ND<1.0 ND<1.0 ND<1.O ND<70 »• --- 6.8 SPL MW-1 10/15/97 9.10 10.65 -1.55 420 ND<100 ND<0.5 ND<1.0 ND<1.0 NDO 0 9700 •-• 7,1 SPL MW-1 01/15/98 9,10 9.40 -0.30 NDt2500 --- ND<0.5 ND<1.0 ND<1.0 ND<1.0 1200 -•- - 6.3 SPL MW-1 05/07/96 910 6.45 2.65 2700 -- ND<0.5 ND<1.0 ND<1.0 ND<1.0 2900 -• - -• SPL MW-1 09703798 9.10 6.67 0.43 17000 - 1.2 ND<1.0 ND<1.0 ND<1,0 13000 -- 6.2 SPL MW-2 12/21/92 8.90 10.96 -2.06 ND<50 -- ND<0.5 NO<0.5 ND<0.5 ND<O.5 -- -•- -- -- PACE MW-2 05117193 8.90 8.20 0.70 120 --- 1.6 0.6 1.2 1 -- ••• - •-• PACE MW-2 09/15/93 8.90 9.58 -0.68 2800 -- 97 ND<25 290 250 -- --- - -- PACE MW-2 01/12/94 8.90 10.28 -1.38 51 --- ND4.5 ND<0.5 ND<0.5 ND<0.5 130 (d) - -- 4.3 PACE MW-2 05/12/94 8.90 9.57 -0.67 64 »- ND<0.5 ND<0.5 ND<0S N04.5 120 (d) -- •- 3.9 PACE MW-2 10/07/94 8,90 10.36 -1.46 86 -- ND<0.5 NO<O,5 ND<0.5 ND<0.5 -• ••• - 4.0 PACE MW-2 12106/94 6.90 10.53 -1.63 2300 -- ND<05 ND<0.5 N0<0.5 ND<O5 -- --- -- 4.0 PACE MW-2 02/21/95 8.90 8.24 0.66 1100 --- 2.7 ND-2.5 ND<2.5 ND<5.0 (c) --- - 8.2 ATI MW-2 06109/95 6.90 7.76 1.14 --- --- MW-2 06/31/95 8.90 9,56 -0.68 550 --- NDc5.0 NDc5.0 ND<5.0 ND<10 2500 --- -- 8.5 ATI MW-2 11/02/95 8.90 10.15 -1.25 --- --- - --- w --- ... MW-2 02/28/96 6.90 6.61 2.09 90 -- 2.1 ND<1 2 ND<1 1400 •- - 8.3 SPL MW-2 09/05/96 8.90 9.12 •0.22 ND<50 -- NDc0.5 ND<1,0 ND<1.0 NO<1.0 ND<10 --- - 8.4 SPL MW-2 03/25797 8.90 6.32 2.58 1300 ••• ND<0.5 ND<1,0 ND<1.0 ND<1.0 3600 --- -- 7.7 SPL MW-2 t0/15!97 8.90 10.42 -1.52 670 ND<o.s ND<10 ND<1.0 ND<t.o 21000 - 6,3 SPL MW-2 0171566 8,90 9.26 4.36 17000 --- ND<0.5 ND<1.0 ND<1.0 ND<1.0 16000 -- --- 5.6 SPL MW-2 65/07/98 8.90 6.23 2.67 67000 - ND<0,5 ND<1.0 ND<1.0 ND<7.0 110000 -- -• - SPL MW-2 09/03198 8.90 6.42 0.48 31000 ND<2.5 ND<5.0 NDc6.0 ND<5.0 33000 •- - 6.6 SPL 17-Nnv-9fl Party 1