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and sampling form included in Appendix A The wells were allowed to recharge to at least 80% of <br /> their respective static water levels pnor to sample collection The approximately 350 gallons of <br />' purged water was taken to Riverbank Oil Transfer under Umforin Hazardous Waste Manifest <br /> number 21658809 by American Valley Waste Oil, Tic A copy of the signed bill of lading is <br /> included in Appendix C <br /> The samples were recovered using clean, disposable bailers, and were then transferred into 40-m1 <br /> VOA vials All samples were labeled, placed in an ice chest, chilled with ice to 4° C, and <br /> transported to Piecnsxon Envi-o-tech Analytical Laboratory (an ELAP-certified laboratory in <br /> Stockton, California) for analysis using appropriate chane-of-custody procedures <br /> The results of all current and previous groundwater gaugmgs are s»mmanzed in Table 1 The <br /> average depth-to-water on February 19, 2002 was 10 70 feet below the top of the casing <br /> elevation of the three project monitoring wells At that time, the local direction of groundwater <br /> ' flow (utilizmg elevation data from the monitoring wells) was calculated at approximately North <br /> 9 20 E along a gradient of 0 00323 foot/foot (equivalent to 3 23 feet of dip per 1000 feet of <br /> horizontal distance) (see Figure 2) <br /> TABLE 1 <br /> HISTORICAL GROUNDWATER SOUNDING DATA <br /> ' Port of Stockton Former UST Site No 3,San 3oa um County <br /> WAttBI 7 a i1e V^ <br /> y A` kibly O'ir"94 <br /> wee % 93Jpate ;,�1e17tt#TO * Sit1 "SOI? a <br /> 1►lumber0tittd mater{I<~t) levaha�t{Pt) E[e aljo� f;r G�diea� sFtt) <br /> a <br /> e TOSR951Q r <br /> MW3-1 07/09/99 1110 935 -175 East Northeast <br /> @ 0 004 ft/ft <br /> ' 10/22/99 1140 -205 North 40°degrees west <br /> @ 0 024ft/ft <br /> 02/08/00 1099 -164 North 16°degrees east <br /> ' @ 0 008ft/ft <br /> 05/17/00 1009 -073 East 22°degrees south <br /> @ 0 012ft/ft <br /> ' 09/14/00 1175 -240 South 6°degrees east <br /> @0 014ft/ft <br /> 02/14/01 1129 -194 South 22°degrees west <br /> ' @0 035ft/ft <br /> 5/17/01 1077 -142 North 17 3°degrees <br /> west @ 0 0028 ft/ft <br /> ' 08/22/01 1255 -320 West 32°degrees south <br /> @ 0 0044 ft/ft <br /> 11/19/01 1286 -351 West 46 7°degrees <br /> ' south @ 0 0051 ft/ft <br /> 2/19/02 1096 -161 North 9 20 degrees east <br /> 0 00323 ft/ft <br /> ' ust 140 gtr)0 do 5 <br /> 1 <br />