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E% = M = = M = M = = M M = =
<br /> TAB 1
<br /> GROUNDWATER DATA
<br /> THRIFTY OIL STATION#172,STOCKTON,CA
<br /> DATE ANALYTICAL PARAMIJ CELLS DEPTH TO DEPTH TO PRODUCT CASING GROUNDWATEIR
<br /> .SAMPLED TPH BENZENE TOLUENE EthylRenzene XYLENE MT11E GROIINi)WATER PRODUCT THICKNESS ELEVATION ELEVATION
<br /> (ug/j-) (elm) (u!�) (119Q (ug/L) (up)L) (feet) (feet) (feel) (feet) (feet)
<br /> 08/26198 28 000 4,500 900 <0 3 !]5,2(0)
<br /> 500 2 100 3630 NP 000 13 18 -2312
<br /> 11/24/98 23 000 5,400 1 100 <6 ,400 <20 3460 NP 000 13 18 -2142
<br /> 02/18/99 22,000 ..5 000 1 200 <6 0 1,900 32l0 NP 000 13 V8 -1892
<br /> 05/20/99 34,000 6,000 1,300 <30 000 1,700 3255 NP 000 13 18 1937
<br /> 08/18/99 140 000 28,000 1 32 000 1 500 17,000 1 100 3563 NP 000 13 18 -2245
<br /> 11110/99 28,000 4,700 4300 <60 2,900 1,200 37 16 NP 000 13 18 -23 98
<br /> 02/23/00 5 000 1 440 1,240 <12 1,420 *1 28011 110 3969 NP 000 13 18 -2551
<br /> 05/10/00 2 140 19 <0 25 <0 25 19 1,350 3065 NP 000 13 18 1747
<br /> 08118100 <50 i <5 <5 <5 <5 1,460 3483 NP 000 13 18 -21 65
<br /> 11/09100 <50 <0 18 <0 14 <0 18 <0 26 772 35 62 NP 000 13 18 -22 44
<br /> 02/15/01 <50 <0 3 <0 2 <0 2 <0 4 976 31 82 NP 000 13 18 -1864
<br /> 05117/01 SAMPLE BROKEN 3869 NP 000 13 18 -2551
<br /> 05/24/01 239 000 1 55 800 73 600 10 000 58 600 2,900 - - 13 18 -
<br /> 08/16/01 151,000 6 880 8,930 927 4 910 367 4023 NP 000 13 18 -2705
<br /> 11108101 9 100 341 441 <2 0 <4 0 5,570 4059 NP 000 13 18 -2741
<br /> 02/21/02 141 000 17,500 26 100 2 850 15,300 932 3751 NP 000 13 18 -2433
<br /> 05/22/02 127 000 18 300 25 100 1 530 11,500 786 31 85 NP 000 13 19 -1867
<br /> 08/14/02 49 900 12,100 10 500 <17 8,800 783 3256 NP 000 13 18 -1938
<br /> 11/20/02 5 170 190 18 179 421 32 3409 NP 000 13 18 -2091
<br /> 02112/03 <15 <0 22 <0 32 <0 31 <0 4 31 3256 NP 000 13 18 -1938
<br /> 05/21/03 61 700 9,820 9,000 1581 4,690 4,500 3947 NP 000 13 18 -2629
<br /> 08/20/03 144 000 2 600 2,910 <15 5 4 360 39,500 3852 NP 000 13 18 -25 34
<br /> 11/26/03 38,600 5,670 8,150 397 3,180 127 3926 NP 000 1318 -2608
<br /> 02/05104 61 000 3,550 7 000 5 380 31 400 156 3793 NP 000 13 18 -2475
<br /> 05/05/04 62,800 1,630 7,860 592 6,380 25,100 3672 NP 000 13 18 -2354
<br /> 08/11/04 193,000 24 200 30,400 1,480 12,200 941 4006 NP 000 13 18 -2688
<br /> 09/30/04 229,000 31 000 33,900 3,400 18 200 736 4090 NP 000 13 18 2772
<br /> NOTE ND=Nondetectable
<br /> =Not analyzed/Not available Benzene toluene ethlybenzene,and xylene analyzed by EPA method 8020
<br /> NP=No free hydrocarbon product Total petroleum hydrocarbons(TPH)analyzed by EPA method 8015 modified for gasoline
<br /> MTBE by 8020 or 8020/8260 Methyl-tert Butyl Ether(MTBE)analyzed by EPA method 8020 or 8260
<br /> On 8118100 and beginning 2/15101 BTEX and MTBE analyzed by EPA Method 8260B
<br /> f72TAB I XLS Page 10 of 10 10/13/04
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