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{ <br /> Morita Brothers <br /> 814 E. Charter Way, Stockton <br /> i Page 3 of 3 <br /> 4 <br /> may have been immediately overlying the 70- to 80-forot sand. EHD recommends that <br /> wells screened in the C interval sand zone be installed near MW-2, MW-5 and MW-6 to F <br /> initially assess the interval. If field indications or laboratory results indicate the presence <br /> of dissolved hydrocarbons in the C interval, the screen intervals of proposed monitoring <br /> wells MW-208, MW-209 and MW-210 should be modifiied to address the 70 to 80-foot i <br /> sand interval and the wells should be installed in the same locations utilized for the new <br /> B interval wells. If ground water in the C interval sand is not impacted in the suspected <br /> 4 source area, then the proposed outboard deeper wells will not be required. <br /> The work plan stipulates that no soil samples will be collected for laboratory analysis <br /> during installation of the ground water monitoring wells;'i EHD recommends that any soil <br /> samples collected in new areas that yield any field indications of hydrocarbon <br /> contamination be submitted for laboratory analysis as !;needed to properly assess the I <br /> extent and magnitude of such impacted soil. <br /> ` If you agree with the recommendations above, ple ease submit a brief work plan <br /> addendum noting the changes. If you disagree with any of the recommendations, please <br /> ' provide justifications for such specific elements of the original work plan as submitted. <br /> Please provide your response to EHD by 26 September" 2002. Questions or comments <br /> may be directed to the undersigned by mail (address on letter head), by e-mail at <br /> nhenderson(a)sicehd.com, or by telephone at (209) 468-3436. { <br /> Donna Heran, REHS, Director <br /> Environmental Health Department <br /> Nuel C. Henderson, Jr., R.G. <br /> LOP/Site Mitigation Unit IV <br /> r <br /> cc: Marty Hartzell-CRWQCB <br /> Raynold I. Kablanow II-Geological Technics Inc. <br /> k <br /> i <br /> h <br /> E <br /> I <br />