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CLOSURE REQUEST REPORT Section No 5 0 <br /> Former American Forest Products Company 07/31/01 <br /> 2801 West Lane Page 5-4 <br /> Stockton,California <br /> plume Samples collected from clustered well pairs indicate that the groundwater data collected from the <br /> submerged wells indicated that the water table samples have higher TPH concentrations Because the <br /> new wells were installed in the areas of maximum soil impacts, the reported TPH concentrations in <br /> samples from these wells are assumed to represent maximum groundwater impacts at the site The lower <br /> concentrations in samples collected from below the water table indicate that dissolved concentrations are <br /> generally near or below the 100 pg/L guideline concentration Finally, diesel phase was not encountered <br /> at the new wells, and has never been reported at the site, indicating that the severity of diesel impacts is <br /> minimal <br /> 16. Analysis of groundwater samples for fuel oxygenates and 1,2-DCA. <br /> As regeuested by the PHS-EHD, groundwater samples were collected and anaylzed for fuel oygenates <br /> and 1,2-DCA in order to assess potential impacts from fuel additives Samples were collected during <br /> August 2000 and November 2000 Fuel oxygenates included ethanol, methanol, t-butanol, 1,2-DCA, tert- <br /> amyl methyl ether, tert-butyl ethyl ether, isopropyl ether, and methyl tert-butyl ether <br /> K 184019`afplafp_closure_rpt doc 07/31/01 3 24 PM <br />