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KLEI 'NFELDER <br /> File No. 20-2983-03 <br /> Fi October 26, 1990 <br /> FW.D.O. , Inc. <br /> 7599 Linne Road <br /> Tracy, California 95376 <br /> Attention: Dave Olmstead <br /> Subject: ADDENDUM TO SEPTIC SYSTEM SUITABILITY STUDIES <br /> PROPOSED SUBDIVISIONS <br /> LOCATED NEAR VALPICO ROAD AND MACARTHUR DRIVE <br /> 3 SAN JOAQUIN COUNTY, CALIFORNIA <br /> Gentlemen: <br /> FPresented in this report are the results of additional studies <br /> regarding nitrate loading for subdivisions located southeast of <br /> FlitTracy in a section bounded by Valpico Road on the north, Chrisman <br /> Road on the east, Linne Road on the south, and MacArthur Drive on <br /> Pthe west. As you are aware, our firm has prepared several septic <br /> system suitability studies within the limits of the study area in <br /> accordance with Ordinance No. 3323 , Division 10, Chapter 2, Section <br /> F 9-10100, Item C. San Joaquin County Environmental Health has <br /> expressed concern regarding the additional nitrate loading to the <br /> Fupper aquifer beneath the study area. The maximum allowable <br /> nitrate concentration in drinking water, according to State <br /> Fstandards, is 45 mg/l. With wells in the area generally indicating <br /> a nitrate concentration of between 30 to 35 mg/l, the groundwater <br /> Fbeneath the site has a limited capacity for additional nitrate <br /> loading from septic systems. <br /> In our evaluation we have reviewed the following soils and septic <br /> system suitability reports: <br /> F' <br /> J + <br /> copyright 1990 Kteinfelder, Inc. <br />�l KLEINFELDER 2825 East Myrtle Street, Stockton, CA 95205 (209) 9484345 <br />