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Table 3 <br /> Historical Groundwater Elevation Data <br /> Time Oil Company-Property 04-049 <br /> 14000 East Highway 88 <br /> I_ockeford, California <br /> WELL DATE TOP OF CASING PRODUCT DEPTH TO GROUNDWATER ELEVATION <br /> ID SAMPLED ELEVATION ' THICKNESS WATER ELEVATION CHANGE CGWE` <br /> (FEET) (FEET) (FEET) (FEET) (FEET) (FEET) <br /> MW-10 07/19/96 10051 NP 6770 3281 <br /> 12119196 NP 6690 3361 080 <br /> 02/26/97 NP 7720 2331 -1030 <br /> 04/16/97 NP 7700 2351 020 <br /> 07/14/97 NP 7649 2402 051 <br /> 10/13/97 NP 7646 2405 003 <br /> 01/27/98 NP 7696 2355 -050 <br /> 04/27/98 NP 7613 2438 083 <br /> 08/13/98 NP 6659 3392 954 <br /> 10/26/98 NP 7505 2546 -846 <br /> 01/27/99 NP 7542 2509 -037 <br /> 04/26/99 NP 7571 2480 -029 <br /> 07/14/99 NP 7586 2465 -015 <br /> 11/24/99 NP 7679 2372 -093 <br /> 02/17/00 NP 7689 2362 -010 <br /> 06/01/00 NP 7636 2415 053 <br /> 08/18/00 NP 7687 2364 -051 <br /> 11/03/00 NP 7501 2550 1 86 <br /> 01/11/01 NP 7683 2368 -182 <br /> 04/27/01 NP 7600 2451 083 <br /> 08/20/01 NP 7694 2357 -094 <br /> 11/28/01 NP 7852 2199 -1 58 <br /> lie 03/04/02 NP 7853 21 98 -001 <br /> 05/16/02 102 86' NP 7866 2420 222 <br /> 07/25/02 NP 7898 2388 -032 <br /> 11/12/02 NP 7959 -7959 -10347 <br /> 01/16/03 NP 8465 -8465 -506 <br /> 05/15/03 NP 9011 -9011 -546 <br /> 07/24/03 NP 9291 -9291 -280 <br /> 10/20/03 NP 9311 -9311 -020 <br /> 01/05/04 NP 9316 -9316 -005 <br /> 04/01/04 NP 9228 -9228 088 <br /> 07/23/04 NP 8861 -8861 367 <br /> 10/04/04 NP 1 8164 1 -8164 1 697 <br /> Notes <br /> NP = Not Present <br /> CGWE = Corrected Ground Water Elevation <br /> PT = Product Thickness <br /> ' Initial survey conducted on 1119195 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 /> Oge =Observed groundwater elevation <br /> SgP = Estimated specific gravity of free phase gasoline=assumed specific gravity <br /> Monitor wells were resurveyed by Morrow Surveyrng on May 14, 2002 <br /> ' Well considered dry <br /> 1\Time 0ALotkeford\Tab1es\SCM&Asmt Tbls xls Page 10 of 10 <br />