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1 <br /> 1 January 31, 2006 <br />' Public Health Services <br /> San Joaquin County <br />' 304 East Weber Ave 3rd Floor <br /> Stockton, CA 95202 <br /> RE Quarterly Report January 2006 <br />' Beneto Inc <br /> 749 E Charter Way <br /> Stockton, CA <br />' Site No 1060 <br /> This site was sampled on January 16, 2006 Argon Laboratories analyzed the samples, <br />' their report is attached <br /> Table 1 lists the history of the water table depths, elevations, water analyses and oxygen <br /> levels at this site since January 26, 1990 Table 2 lists the hydraulic gradients and <br /> bearings Sampling protocols are included <br /> FINDINGS <br /> The groundwater gradient bearing is N 79 E and the gradient is 0 0014 Ftlft See Table 2 <br /> and Figure 1 <br />' Each well was measured for depth of water prior to any wells being purged The depth to <br /> water in the first measurement is written and noted on the sample sheets <br /> The groundwater in wells MW-1, MW-5, MW-6, MW-7, MW-8, MW-9 and MW-10, were <br />' above California Drinking Water Standards for benzene The benzene plume appears to <br /> be flowing southeast around well MW-1 Wells MW-7 and MW-9 are contaminated from <br /> sites, west of this site See Figure 2 <br /> The wells that had TPH are MW-1, MW-2, MW-3, MW-4, MW-5, MW-6, MW-7, MW-8, <br /> MW-9, MW-10, MW-11, MW-13 and MW-16 Wells MW-7 and MW-9 are contaminated <br /> from sites entering this site from a source west of this site See Figure 3 <br />' MtBE was recorded in wells MW-1, MW-2, MW-9, MW-11, MW-13 and MW-16 Wells <br /> MW-1, MW-2, MW-9 and MW-11 had levels over 5 ug/L <br />' Dissolved oxygen levels were recorded this quarter The measured levels are shown on <br /> Table 1 and Figure 5 <br /> 1 <br /> r <br />