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Quit.Stop Station No 39 February 14 2003 <br /> Stockton California _ _ _ _ _ Results Report and«ori,Plan Addendum <br /> . sampling and CPT Iogging services Underground Service Alert was contacted on <br /> December 12, 2002 to arrange for an underground utility clearance The fieldwork for the <br /> additional subsurface investigation was conducted on December 19 and 20, 2002 <br /> Locations of the CPT-log boring (CPT) and soil borings (B1 through B-5) are shown on <br /> Figure 2 The CPT-log boring was advanced to 100 feet bsg to obtain a log of the soil <br /> profile and a depth to groundwater A pore-dissipation test was performed at approximately <br /> 97 feet to evaluate the static groundwater level A draft CPT log was generated at the site <br /> k <br /> The hydropunch sampler was advanced to various depths at five locations (soil borings SBI <br /> through SB5) for collection of groundwater samples The groundwater sampler was <br /> i <br /> typically driven to the target depth and retracted approximately 4 feet to expose the <br /> hydropunch screen All CPT borings were backfilled with cement <br /> Groundwater samples were recovered from 94 to 100 feet bsg from soil borings SBI through <br /> SB3, from 56 to 65 feet bsg from soil borings SB4 and SB5 Four groundv ater sample <br /> recovery attempts were unsuccessful at 57 to 61 feet in soil boring SBI at 46 to 50 feet 61 <br /> feet and 55 to 59 feet in soil boring SB2, and at 52 to 61 feet in soil boring SB3) <br /> Groundwater samples were recovered with a decontaminated, stainless steel bailer lox�ered <br /> through the drive rods into the sampler screened interval The recovered samples were <br /> decanted into prepared sample containers The groundwater samples were placed in a <br /> cooled ice chest for temporary storage and transport The groundwater samples were <br /> submitted, under chain-of-custody (COC) documentation to Kiff Analytical LLC (Kiff) of <br /> Davis, California, a California Department of Health-certified laboratory (ELAP No 2236) <br /> The samples were analyzed for total petroleum hydrocarbons as gasoline (TPHg) the <br /> volatile aromatic compounds benzene, toluene, ethylbenzene and total xylenes (BTEX), the <br /> seven fuel oxygenates methyl-t-butyl ether (MTBE), diisopropyl ether (DIPS), ethyl-t-butyl <br /> ether (ETBE), tert-amyl methyl ether (TAME), tert-butanol (TBA), and the halogenated <br /> organic compounds 1,2-dichloroethane (DCA) and 1,2-dibromoethane (EDB) by <br /> C 1Profects170391141WPaddnm2-03 doc <br /> Protect No 7039 14 4 HORIZON ENVIRONMENTAL INC <br />