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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 prior to sample collection The approximately 270 gallons of <br /> Purged water was taken to Americlean Inc under bill-of-lading number 21142720 A copy of the <br /> 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 gaugmgs are summarized in Table 1 The <br /> average depth-to-water on August 22, 2001 was 12 36* feet below the top of the casing elevation <br /> of 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 West 320 S <br /> along a gradient of 0 0044 foot/foot (equivalent to 4 4 feet of dip per 1000 feet of horizontal <br /> distance) (see Figure 2) <br /> TABLE 1 <br /> HISTORICAL GROUNDWATER SOUNDING DATA <br /> Port of Stockton Former UST Site No 3, San Joaquin County <br /> Well Date Depth To Casing-Top Water Table Avg Flow Direction <br /> Number Sounded Water(Ft) Elevation(Ft) Elevation(Ft) &Gradient(Ft(Ft) <br /> MFrom Cann <br /> MW3-1 07/09/99 11 10 935 -1 75 East Northeast <br /> @ 0 004 ft/ft <br />' 10/22/99 1140 -2 05 North 40'degrees west <br /> @ 0 024ft/ft <br /> 02/08/00 1099 -164 Notch 16°degrees east <br />' @ 0 008ft/ft <br /> 05/17/00 1008 -0 73 East 22°degrees south <br /> @ 0 012ft/ft <br /> 09/14/00 11 75 -240 South 60 degrees east <br /> @0 014ft/ft <br /> 02/14/01 1129 -1 94 South 22°degrees west <br /> @0 035ft/ft <br />' 5/17/01 1077 -142 North 17 Y degrees <br /> west @ 0 0028 ft/ft <br /> 08/22/01 1255 -320 West 32°degrees south <br />' MW3-2 07/09/99 10 89 922 -1 67 0 0044 ft/ft <br /> 10/22/99 11 80 -258 <br />' 02/08/00 1089 -1 67 <br /> 05/17/00 967 -045 <br /> 09/14/00 1146 -2 24 <br />' 02/14/01 11 12 -190 <br /> 5/17/01 1068 -146 <br /> • 08/22/01 15 50* -6 76* <br />' 12 48** 1 -326 <br /> ust svteS gtrS doc 5 <br /> t <br />