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Y k'q KLEINFELDIR <br /> 1 <br /> Our calculation is as follows: <br /> Ne = 0.95(2)(70)(1 -0.35) + 0.5(14.4) 86.45 + 7.2 = 5.7 mg/l as N S GS _ Spy <br /> 095(2) + 14.4 1,9 + 14.4 <br /> 7' <br /> CONCLUSIONS: <br /> As shown above, we calculate 5.7 mg/1 of nitrate-nitrogen (N) in groundwater resulting from the <br /> proposed leach fields, a result that is below the state standard of 10 mg/l. Based on this <br /> relatively low level of nitrate-nitrogen,we anticipate that the impact on surrounding wells will be <br /> minimal and no remediation will be necessary. The Mokelumne River and Bear Creek are the <br /> nearest natural water bodies to the site and are each located approximately 1 mile from the site, <br /> but are generally not down gradient. Based on this distance and the relatively low nitrate- <br /> nitrogen levels calculated, we anticipate that the impact to water bodies will be minimal and no ; <br /> remediation will be necessary. <br /> The results of our percolation tests indicate that the proposed septic tank/leach trench sewage ` <br /> disposal system should adequately serve the facility. A suitable soil condition for septic <br /> k percolation tests is defined as a stratum capable of percolating water at a rate of 60 minutes per <br /> 9 inch (min/inch) at a depth of up to 3.5 feet below existing site grade or 30 min/inch for deeper <br /> tests. <br /> LIMITATIONS <br /> The conclusions Ibf this report are based on the information provided regarding the existing <br /> development and'on the site conditions. It was assumed that the percolation test results are <br /> representative-of the subsurface conditions in'the general area. <br /> This completes the scope of work requested. Our work was performed in general accordance <br /> with the standard'of care that exists in San Joaquin County. No other guarantee or warranty, <br /> expressed or implied, is made. <br /> Respectfully submitted, <br /> �pFf551pN <br /> Q q� QROFESSIU <br /> KLEIN ELDE ���•� Q�\C+ L0(�P FSG Review <br /> ti <br /> No.64089 m E <br /> 0o J <br /> 2 EXP 9-06 6; <br /> cs j CN1V ��� Ron Heinzen G.E. eF cW- . <br /> Ronald . Lo zenhlser, C. qr off' rq orrsM��.• <br /> Staff Profess' nal f OF C Senior Principal S OF U "C' <br /> REL:lr <br /> Attachments <br /> 35025.GOIIST03R1509 October 10,2003 <br /> ©2003 Kleinfelder,Inc. Page 5 of 6 <br />