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Formal Closure Request,Site Code 1203 <br /> Stockton Regional Wastewater Treatment Facility <br /> 2500 W. Navy Drive,Stockton,CA <br /> October 6, 1992 <br /> Page 2 <br /> addition, the surface above and surrounding this area is covered by impermeable asphalt and is <br /> graded to,prevent ponding water. -This greatly limits infiltration of precipitation. <br /> Based upon the limited areal extent of residual diesel hydrocarbons in tight soils, the low level <br /> of impaction, and the absence of contaminants in groundwater, residual hydrocarbons in the soil <br /> do.not appear to constitute a .threat to public health or the waters of-the state. <br /> RESNA, on. behalf of the City of Stockton;.requests case closure. It is the intention of the City <br /> to discontinue monitoring and sampling at .the site, and._ to apply for monitoring well <br /> abandonment. The City anticipates PHS/EHD written concurrence for the closure of this site. <br /> If you have any questions or comments please contact John Lane at your earliest possible <br /> convenience. <br /> Respectfully, <br /> RESNA Industries Inc. <br /> JUin P. Lane <br /> Project Geologist <br /> Gregory P. Stahl <br /> CA Registered Geologist No. 5023 <br /> TJLlggk <br /> PC: Mr. Jim Escobar., City of Stockton <br /> Ms: Elizabeth Thayer, CRWQCB <br /> E <br /> f <br /> E <br /> Q RTLY RP1R LA 090992.FN L <br />