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Table 3 <br /> Historical Groundwater Elevation Data <br /> Time Oil Company-Property 04-049 <br /> 14000 East Highway 88 <br /> Lockeford, California <br /> WELL DATE TOP OF CASING PRODUCT DEPTH TO GROUNDWATER ELEVATION <br /> ID SAMPLED ELEVATIONTHICKNESS WATER ELEVATION CHANGE CGWE` <br /> (FEET) (FEET) (FEET) (FEET) (FEET) (FEET) <br /> MW-3 01/19/95 10052 NP 8692 1360 <br /> 05/24/95 NP 8650 1402 042 <br /> 10/04/95 NP 8588 1464 062 <br /> 12/19/95 NP 8519 1533 069 <br /> 02/28/96 NP 8496 1556 023 <br /> 05/23/96 NP 8440 1612 056 <br /> 07/19/96 NP 8447 1605 -007 <br /> 12/19/96 NP 7992 2060 455 <br /> 02/26/97 NP 7892 21 60 1 00 <br /> 04/16/97 NP 8223 1829 -331 <br /> 07/14/97 NP 8223 1829 Goo <br /> 10/13/97 NP 8181 1871 042 <br /> 01/27/98 NP 8218 1834 -037 <br /> 04/27/98 NP 8131 1921 087 <br /> 08/13/98 NP 7685 2367 446 <br /> 10/26/98 NP 7639 2413 046 <br /> 01/27/99 NP 7702 2350 -063 <br /> I 04/26/99 NP 7700 2352 002 <br /> 07/14/99 NP 7834 22 18 -134 <br /> 11/24199 NP 8035 2017 -201 <br /> 02/17/00 NP 8000 2052 035 <br /> 06/01/00 NP 7545 2507 455 <br /> 08/18/00 NP 7643 2409 -098 <br /> 11/03/00 NP 7514 2538 1 29 <br /> 01/11/01 NP 7595 2457 -081 <br /> 04/27/01 NP 7235 2817 360 <br /> 08/20/01 NP 7168 2884 067 <br /> 11/28/01 NP 8598 1454 -1430 <br /> 1 03/04/02 NP 8467 1585 1 31 <br /> 05/16/02 102 62' NP 7855 2407 822 <br /> 07/25/02 NP 8480 1782 -625 <br /> 11/12/02 NP 8555 1707 -075 <br /> 1 01/16/03 NP 8498 -8498 -10205 <br /> 05/15/03 NP 8510 -8510 -012 <br /> 07/24/03 NP 8488 -8488 022 <br /> 10/20/03 NP 8590 -8590 -102 <br /> 01/05/04 NP 8578 -8578 012 <br /> 04/01/04 NP 8520 -852 058 <br /> 07/23/04 NP 8598 -8598 -078 <br /> 10/04/04 1 NP 1 8624 1 -8624 1 -026 <br /> Notes <br /> NP = Not Present <br /> CGWE Corrected Ground Water Elevation <br /> PT = Product Thickness <br /> Initial survey conducted on 1/19195 for monitor wells MW-1 through MW-4 with an arbitrary datum of 100 feet <br /> assumed at the southeast corner of the underground storage tank concrete pad Monitor wells MW-5 through <br /> MW-10 were surveyed on 07/19/96 using the same arbitrary datum <br /> ` Groundwater elevations corrected where PT was observed, using the equation Oge+ (PT x SgP) <br /> Cge =Oge+(PT x SgP)where <br /> Cge =Corrected groundwater elevation <br /> 1 Oge =Observed groundwater elevation <br /> SgP = Estimated specific gravity of free phase gasoline=assumed specific gravity <br /> ' Monitor wells were resurveyed by Morrow Surveying on May 14, 2002 <br /> Q Well considered dry <br /> Page 3 of 10 <br /> I Mme 0i1%LockefordlTab1eslSCM 8 Asmt Tbls xis <br />