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' Diamond Lumber.Lodi Quarterly Groundwater Monitoring Page 8 <br /> The constituents of BTEX and volatile hydrocarbons were not detected in either monitoring well, <br /> . however, lead concentrations included 12 ppb in SRK-MW1 and 170 ppb in SRK-MW3. <br /> tIn comparison, the constituents of BTEX or volatile hydrocarbons were not detected in monitoring <br /> wells SRK-MW1, SRK-MW2 or SRK-MW3, during the April 1992 sampling; event. Lead <br />' concentrations was detected in SRK-MW1 at 33 ppb, in SRK-MW2 at 260 ppb, and in SRK-MW3 <br /> at 93 ppb. <br /> There are currently 13 55-gallon drums containing cuttings generated from monitoring well <br /> installation and groundwater purged from each of the three monitoring wells during quarterly <br />' sampling events. We currently understand from PHSIEHD (M. Lagorio) that the contents of these <br /> barrels may be distributed evenly on-site. This will be completed during the next sampling event <br /> following written authorization from PHSIEHD). <br /> Static water level information obtained from the three on-site monitoring wells indicates that the <br /> groundwater gradient at the facility is relatively flat. SRK has requested static groundwater elevations <br /> rof wells located near the site from the City of Lodi Public Works Department. This information will <br /> be provided as an addendum to the report when it is received by SRK <br /> .f2Saa,]a 1l-4fi IY•forl <br /> Slef[en Robertson and Kirsien <br />