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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 ELEVATION ' THICKNESS WATER ELEVATION CHANGE CGWE` <br /> (FEET) (FEET) (FEET) (FEET) (FEET) (FEET) <br /> MW-6 07/19/96 9934 NP 6993 2941 <br /> 12/19/96 NP 6982 2952 Oil <br /> 02/26/97 NP 6883 3051 099 <br /> 04/16/97 NP 6748 3186 1 35 <br /> 07/14/97 NP 6634 3300 114 <br /> 10/13/97 NP 6746 31 88 -112 <br /> 01/27/98 NP 6900 3034 -154 <br /> 04/27/98 NP 6753 3181 147 <br /> 08/13/98 NP 6528 3406 225 <br /> 10/26/98 NP 6511 3423 017 <br /> 01/27/99 NP 6593 3341 -082 <br /> 04/26/99 NP 6615 3319 -022 <br /> 07/14/99 NP 6631 3303 -016 <br /> 11/24/99 NP 6785 31 49 -154 <br /> 02/17/00 NP 6802 31 32 -0 17 <br /> 06/01/00 NP 6742 31 92 060 <br /> 08/18/00 NP 6761 3173 -019 <br /> 11/03/00 NP 6790 31 44 -029 <br /> 01/11/01 NP 6879 3055 -089 <br /> 04/27/01 NP 6870 3064 009 <br /> 08/20/01 NP 6983 2951 -1 13 <br /> 1 11/28/01 NP 7114 2820 -131 <br /> 03/04/02 NP 7131 2803 -0 17 <br /> 05/16/02 101 60NP 71 55 3005 202 <br /> 07/25/02 NP 7201 2959 -046 <br /> 11/12/02 NP 7276 -7276 -10235 <br /> 01/16/03 NP 71 99 -71 99 077 <br /> 05/15/03 NP 7222 -7222 -023 <br /> 1 07/24/03 NP 7278 -7278 -056 <br /> 10/20/03 NP 7311 -7311 -033 <br /> 01/05/04 NP 7282 -7282 029 <br /> 04/01/04 NP 71 95 -71 95 087 <br /> 07/23/04 NP 7278 -7278 -083 <br /> 10/04/04 NP 1 7205 1 -7205 1 73 <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 /> 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 /> " Well considered dry <br /> 1 1\Time 011\LOCkeford\TableS\SCM&Asmt Tbls xis Page 6 of 10 <br />