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CHEMWEST <br /> ANALYTICAL LABORATORIES, INC. <br /> November 20, 1989 <br /> Kleinfelder <br /> 9795 Business Park Drive, #D <br /> Sacramento, CA 95827 <br /> Attention: Mr. Eric Findlay <br /> Subject: Report of Data - Case Number 4846 <br /> Dear Mr. Findlay: <br /> The technical staff at CHEMWEST is pleased to provide our report for the <br /> analyses you requested: Arsenic - EPA Methods 6010/7060; Total Chromium - <br /> EPA Method 6010; Hexavalent Chromium - EPA Method 7196; Trivalent - by <br /> Calculation; Copper - EPA Method 6010; and Nitrate-N - EPA Method 300.0. <br /> Nine water samples for Project Number 24-2009-01 were received October 25, <br /> 1989 in good condition. <br /> The arsenic concentrations of samples 4846-6 through 4846-9 were to low to be <br /> analyzed by ICP, Method 6010 accurately therefore they were analyzed by GFAA <br /> Method 7060. <br /> Differences in concentrations of Total and Hexavalent Chromium are the result of <br /> error introduced when large dilution factors are required for sample analysis. <br /> Results of the analyses are presented on the following page(s). <br /> Thank you for choosing CHEMWEST Laboratories. Should you have questions <br /> concerning this data report or the analytical methods employed, please do not <br /> hesitate to contact Debbie Pearce your Customer/Technical Service <br /> Representative. We hope that you will consider CHEMWEST Laboratories for your <br /> future analytical support and service requirements. <br /> Sincerely, <br /> .� <br /> Robert T. Hart' <br /> Data Control Manager <br /> RTH:ds <br /> 60OW North Market Boulevard Sacramento,CA 95834 • Phone(916)923-0840 FAX(916)923-1938 <br /> A Subsidiary of CompuChem Corporation <br />