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extraction volumes, and parameters are included on the field purging and sampling form included <br /> in Appendix A The wells were allowed to recharge to at least 80% of their respective static water <br />' levels prior to sample collection The 300 gallons of purged water was taken to Riverbank Oil <br /> Transfer under Uniform Hazardous Waste Manifest number 21658809 by American Valley Waste <br /> Oil, Inc A copy of the signed bill of lading is 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 Precision Enviro-tech Analytical Laboratory (an FLAP-certified laboratory in <br /> Stockton, California) for analysis using appropriate chain-of-custody procedures <br />' The results of all current and previous groundwater gaugings are summarized in Table 1 The <br /> average depth-to-water on May 16, 2002 was 11 23 feet below the top of the casing elevation of <br /> the three project monitoring wells At that time, the local direction of groundwater flow <br /> (utilizing elevation data from the monitoring wells) was calculated at approximately North 80° <br /> West along a gradient of 0 00249 foot/foot (equivalent to 2 49 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 Joa um County <br /> Well Date Depth To Casing-Top Water Table Avg Flow Direction <br /> Number Sounded Water(Ft) Elevatt...(Ft) Elevation(Ft) &Gradient(Ft/Ft) <br /> From Castn <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 008f1/ft <br /> 05/17/00 1008 -073 East 22°degrees south <br /> @ 0 012ft/ft <br />' 09/14/00 1175 -240 South 6°degrees east <br /> @0 014ff/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 2°degrees east <br /> @ 0 00323 ft/ft <br />' 5/16/02 1144 -209 North 80°degrees west <br /> 0 00249 ft/ft <br /> • <br /> I I 1 qtr ust srte3 clot 5 <br /> M <br />