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Resuft of Addbo d Lkn ted sloe MtiesW' -nd <br /> Request For Ske Maws <br /> 838 Mokelumne Street..Woodbridge,Callfo <br /> REQUEST FOR SITE CLOSURE <br /> California Fuels and Aegis believe all the substantive issues of concern discussed at the <br /> October 7, 1992, meeting have been addressed by the present investigation. In <br /> particular: <br /> 1. The groundwater beneath the site is not at risk of being impacted by those <br /> hydrocarbons that may remain in soils beneath the site due to the real and <br /> fortuitous protection afforded by the "confining" layer as well as the extremely low <br /> leaching potential of the residual hydrocarbons revealed by the chemical analyses <br /> discussed earlier. <br /> 2. Analysis of the samples collected from the three soil borings drilled, at the request <br /> of the CVRWQCB, to the south of the former excavations, near the southern <br /> property line, indicated no TPH, as diesel, above the PQL. Thus, hydrocarbons <br /> have not moved laterally beyond the limits previously defined by the former <br /> excavation(s) and neighboring properties are not at risk. <br /> 3. The former excavations were successful in removing all hydrocarbon-impacted <br /> soils that were accessible in terms of logistics, practicality, and responsibility, <br /> including ensuring protection of the water-bearing zone. <br /> For the reasons set forth above, California Fuels and Aegis respectfully request closure <br /> of the site. <br /> We appreciate the interest of the CVRWQCB in this matter. Please call us at your earliest <br /> convenience, at (916) 782-2110, if you have any questions or comments. Please let us <br /> know in writing, as soon as possible, regarding approval of the request for site closure. <br /> Sincerely, <br /> AEGIS ENVIRONMENTAL, INC. <br /> J, 1—Z <br /> Douglas I. Sheeks <br /> Senior Geologist <br /> CRG No. 5211 <br /> DIS/law <br /> Enclosure <br /> cc: D. Atwater, California Fuels <br /> R. Valinoti, San Joaquin County Public Health Services <br /> 89-031 BB.LTR -3 <br />