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Table 3 <br /> Historical Groundwater Elevation Data <br /> Time Oil Company- Property 04-049 <br /> 0 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-8 07/19/96 10077 NP 7365 2712 <br /> 12/19/96 NP 7409 2668 -044 <br /> 02/26/97 NP 7300 2777 109 <br /> 04/16/97 NP 7178 2899 1 22 <br /> 07/14/97 NP 7085 2992 093 <br /> 10/13/97 NP 7169 2908 -084 <br /> 01/27/98 NP 7279 2798 -1 10 <br /> 04/27/98 NP 7148 2929 1 31 <br /> 08/13/98 NP 7003 3074 1 45 <br /> 10/26/98 NP 7033 3044 -030 <br /> 01/27/99 NP 7095 2982 -062 <br /> 04/26/99 NP 71 55 2922 -060 <br /> 07/14/99 NP 71 78 2899 -023 <br /> 11/24/99 NP 7252 2825 -074 <br /> 02/17/00 NP 7285 2792 -033 <br /> 06/01/00 NP 7276 2801 009 <br /> 08/18/00 NP 7406 2671 -130 <br /> 11/03/00 NP 7314 2763 092 <br /> 01/11/01 NP 7472 2605 -1 58 <br /> 04/27/01 NP 6974 31 03 498 <br /> 08/20/01 NP 7370 2707 -396 <br /> 11/28/01 NP 7598 2479 -228 <br /> lie 03/04/02 NP 7631 2446 -033 <br /> 05/16/02 103 09 s NP 7673 2636 1 90 <br /> 07/25/02 NP 7809 2500 -136 <br /> 11/12/02 NP 8049 -8049 -10549 <br /> 01/16/03 NP 8049 -8049 000 <br /> 05/15/03 NP 7856 -7856 1 93 <br /> 07/24/03 NP 7875 -7875 -019 <br /> 10/20/03 NP 7952 -7952 -077 <br /> 01/05/04 NP 7808 -7808 144 <br /> 04/09/04 NP 7711 -7711 097 <br /> 07/23/04 NP 7736 -7736 -025 <br /> 10/04/04 NP 1 7805 1 -7805 1 -069 <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 /> s Monitor wells were resurveyed by Morrow Surveying on May 14, 2002 <br /> Well considered dry <br /> 1\Time Od\Lockeford\Tables\SCM&Asmt Tbls As Page 8 of 10 <br />