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J. H. KLEINFELDER & ASSOCIATES <br />File No. S-1716-2 <br />July 2, 1985 <br />Page 5 <br />additional wells in the most appropriate locations. The second phase will supplement <br />the findings of the source investigation work by isolating the most significant source <br />areas, provide background water quality information and begin isolating the leading <br />edge of the downgradient plume. <br />Phase 1 <br />Phase I will involve installation of three additional wells; two immediately west <br />and south of the above ground tank and one on the eastern perimeter of the property. <br />These wells will be constructed of 2 -inch Schedule 40 PVC, and screened with <br />0.02 -inch machine slotted screen 5 feet above and 5 feet below the water table. The <br />annular space will be backfilled with #2 sand to 2 feet above the screened section. A <br />1 -foot bentonite seal will be placed above the sand and the remaining annular space <br />backfilled with concrete. A sanitary seal will be placed around the top section of the <br />well and a locking utility box will be installed to protect the well head. Each well <br />will be developed and sampled after five well volumes have been pumped from the <br />well. Sampling will consist of using both a bailer and a submersible bladder pump. <br />The bailer will be used to determime the depth of free floating product material on <br />the water surface. A submersible or bladder pump, operating at a low pumping rate, <br />will be used to collect a representative sample of groundwater which may contain <br />organics in solution with the groundwater. <br />A total of four samples collected from the wells, one blind duplicate and three <br />pump blanks will be submitted for benzene toluene, and xylene (BTX) analysis. One <br />sample from each well, collected with the bailer (for a total of four more samples) <br />will be analyzed to speciate any petroleum product (diesel/gasoline) found floating on <br />the water surface. The one sample collected from the existing monitoring well will <br />also be analyzed for total lead. Standard QA/QC protocol will be followed for all <br />