Laserfiche WebLink
GEOTECHNICAL <br /> NEIL O. ANDERSON ENVIRONMENTAL <br /> A N D A S S O C I A T E S INSPECTIONS & TESTING <br /> LABORATORY SERVICES <br /> POOL ENGINEERING <br /> POST TENSION DESIGN <br /> July 19, 2006 <br /> NOA Project Number:E0516513 <br /> Graig Oliviera <br /> San Joaquin County Environmental Health Department <br /> 304 E. Weber Avenue <br /> Stockton,CA 95212 <br /> Re: Brown's Lake Ranch-SSS <br /> Water Sample Constituents <br /> Dear Graig, <br /> The following is the water sample constituent results from the well tested at Brown's Lake Ranch, <br /> located at 18700 East River Road, Ripon. The FGL Environmental lab results are attached. <br /> Water Sample Constituents <br /> The water sample was analyzed for nitrate and DBCP. DBCP was not detected in the water sample. <br /> Nitrate was found at 46.1 mg/L-NO3,which is slightly above the maximum contaminant level <br /> (MCL) of 45 mg/L-NO3 set by the United States EPA. The analytical reports prepared by FGL <br /> Environmental can be found in the appendix of this report. <br /> Well construction, seals,age and depth of the well screens may play significant part in assessing the <br /> levels of Nitrate and DBCP in various aquifers.Without knowing specific details regarding well <br /> construction and condition,it would be difficult to accurately comment on the condition of the <br /> aquifer. Essentially, the water sample concentration approximately indicates the contaminant <br /> concentration level of the aquifer from which the well is drawing. It is Neil O. Anderson and <br /> Associate's opinion that,in general,near surface aquifers are more likely to have elevated <br /> concentrations of Nitrate and DBCP than the deeper aquifers. However the contaminant <br /> concentration of one aquifer cannot give any indication as to the concentrations of any other aquifer <br /> regardless of proximity. <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 of <br /> fertilizers,livestock waste,and untreated septic tank waste. Nitrate is mobile and often accumulates <br /> in the shallow ground water zones. <br /> LODI ■ SACRAMENTO ■ MODESTO <br /> ENVIRONMENTAL DIVISION 902 Industrial Way,Lodi,California 95240 ■209.367.3701 ■ 209.369.4228 fax ■www.noanderson.com <br />