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TABLE 1- SUMMARY OF RESULTS OF GROUNDWATER MONITORING AND SAMPLING <br /> BP OIL COMPANY SERVICE STATION NO 11194 <br /> 2375 TRACY BOULEVARD,TRACY CALIFORNIA <br /> ALISTO PROJECT NO 10-065 <br /> WELL DATE OF CASING DEPTH TO PRODUCT GROUNDWATER TPH-G B T E X LAB <br /> ID SAMPLING/ ELEVATION (a) WATER THICKNESS ELEVATION (b) (ppb) (ppb) (ppb) (ppb) (ppb) <br /> MONITORING (Feet) (Feet) (Feet) (Feet) <br /> AMW-4 08/10!90 2536 483 000 2053 ND<50 06 07 29 42 SUP <br /> AMW-4 08x27/90 2536 483 000 2053 — — .--- — — <br /> AMW-4 11A)2/90 2536 489 000 2047 — — <br /> AMWA 11 A)5x9D 2536 488 000 2048 ND<50 03 ND<O 3 ND<O 3 NDA 3 SUP <br /> AMWA 02x25/91 2536 408 000 2128 ND<50 NDA 3 NDN 3 NDA 3 ND<O 3 SUP <br /> AMW-4 06/27/91 2536 501 000 2035 ND<50 NDA 5 NDN 5 ND<0 5 NDA 5 CHR <br /> AMW-4 09125191 2536 545 000 1991 ND<30 NDA 30 ND<0 30 ND<0 30 NDN 30 SEQ <br /> AMW-4 12/10/91 2536 479 000 2057 ND<30 NDA 3D NDN 30 NDN 30 ND<O 30 SEQ <br /> AMW-4 03x25191 2536 426 000 2110 NDG30 ND<0 30 ND<0 30 NDA 30 NDN 30 SEQ <br /> AMW-4 06/25192 2536 616 000 1920 ND<30 NDA 30 ND<0 30 ND<O 30 NDA 30 SEQ <br /> AMW-4 12/0&92 2536 474 000 2062 ND<50 ND<0 5 ND<0 5 ND<0 5 ND<0 5 ANA <br /> AMW-5 12110!91 2619 595 000 2024 ND<30 NDN 30 NDN 30 NDA 30 NDA 30 SEQ <br /> AMW-5 0325192 2619 539 000 2060 72 48 ND<O 30 ND<0 30 NDN 30 SEQ <br /> AMW-5 06125/42 2619 7.27 000 1692 ND<30 NDN 30 ND<O 30 NDA 30 NDN 30 SEQ <br /> MAW 5 12/06192 2619 578 000 2041 56 (c) NDA 5 ND<0 5 NDN 5 ND<0 5 ANA <br /> AMW-6 12/10191 2633 585 O 00 2048 ND<30 NDN 30 ND<O 30 ND<0 30 ND<0 30 SEQ <br /> AMW-6 03125/92 2633 486 000 2147 97 43 NDA 30 74 61 SEQ <br /> AMW-6 06/25W 2633 700 000 1933 ND<30 NDA 30 ND<O 30 NDN 30 NDA 30 SEQ <br /> AMW-6 1210&92 2633 582 000 2051 ND<50 ND<O 5 NDN 5 NDA 5 NDA 5 ANA <br /> QC-2 (1) 12908W — — — ---- ND6"90 ND<45 ND<O 5 NDN 5 NDA 5 ANA <br /> ABBREVIATIONS NOTES <br /> TPH-G Total petroleum hydrocarbons as gasoline (a) Casing elevations surveyed to Ithe most southwesterly anchor bolt of the signal standard <br /> B Benzene located at the most southerly return of the southwest comer of the intersection of <br /> T Toluene Grant Line Road and Tracy Boulevard(elevation 26 13) <br /> E Ethylbanzene <br /> X Total xylenes (b) Ground water elevation adjusted assuming a specific gravity of 0 75 for free product. <br /> ND Not detected above reported detection lirnrls <br /> Not analyzedlapplicable (c) The concentrations reported as gasoline are primarily due to <br /> SUP Supenor Analytical Laboratories the presence of a discrete hydrocarbon peak not indicative of gasoline <br /> ANA Anamebu,Inc <br /> CHR Chromalab,Inc (d) Recovery well not sampled <br /> SEQ Sequoia Analytical <br /> (e) Blind duplicate of sample collected from MW-8 <br /> (f) Travel blank <br /> 03-Fe"3 <br /> PAGE 6 OF 6 <br />