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GEOTECHNICAL <br /> -- "� NEIL O. ANDERSON <br /> ,,-- ENVIRONMENTAL <br /> AN D ASSOCIATES INSPECTIONS & TESTING <br /> LABORATORY SERVICES <br /> i <br /> POOL ENGINEERING <br /> POST TENSION DESIGN <br /> January 5, 2006 <br /> NOA Project Number: E05174A I <br /> Jr .P; 0 � X1700 <br /> Transmitted by Fax: (209) 464-0138 ENVEOfa"GENT HEALTH <br /> PER-POITSERVICES i <br /> San Joaquin County, Environmental Health Department <br /> i <br /> 304 East Weber Avenue,Third Floor <br /> Stockton, California 95202 <br /> cc: <br /> Rolando Calderon <br /> SKS Enterprise Incorporated <br /> 11830 E. French Camp Road <br /> Manteca, CA 95336 <br /> RE: Soil Suitability/Nitrate Loading Study DBCP results <br /> 23709 E. Brandt Road, Lodi, California <br /> San Joaquin County, PA-04-365 <br /> To Whom it may concern: <br /> The results for the water sample taken by Nancy Rosulek on December 15, 2005 are below. <br /> i <br /> .4 Water Sample Constituents <br /> 3�' The water sample was analyzed for nitrate and DBCP. Neither DBCP or nitrate were not detected <br /> in the water sample. The analytical reports prepared by Precision Enviro-Tech can be found <br /> attached to this letter. i <br /> The presence of nitrates is not uncommon in shallow ground water aquifers in San Joaquin County <br /> and other parts of the Central Valley. Nitrate in ground water occurs as a result of the application <br /> of fertilizers,livestock waste, and untreated septic tank waste. Nitrate is mobile and often <br /> accumulates in the shallow ground water zones. <br /> In the early 1900s,natural levels of nitrate in ground water were measured in forty-three (43) wells <br /> throughout the Sacramento Valley by Bryan (1923). It was thought that ground water at that time <br /> was close to"natural" conditions. Based on the work by Bryan,it is estimated that under"natural" <br /> conditions,ground water concentration containing nitrate is no more then about 13.5 mg/L-NO3 (3 <br /> mg/L-N). Areas having 24.75 mg/L-NO3 (5.5 mg/L-N) or more are those in which nitrate <br /> concentrations may be increasing (Hull, 1984). <br /> LODI ■ SACRAMENTO ■ MODESTO <br /> ENVIRONMENTAL DIVISION 902 Industrial Way,Lodi,California 95240 ■209.367.3701 0 209.369.4228 fax ■www.noanderson.com <br />