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PRECISION <br /> ENVIRO-TECH <br /> Analytical Laboratory CERTIFICATE OFANALYSIS <br /> Thursday,January 20, 2005 <br /> Attention: Abby Racco <br /> Neil O.Anderson &Associate Report Page 5 of 12 <br /> 902 Industrial Way <br /> Lodi, CA 95240 <br /> Metals by EPA 200 Series Methods-Quality Control <br /> Precision Euviro-Tech <br /> Reporting Spike Source %RF-C RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch AA50704-EPA 200 Series <br /> Blank(AA50704-BLKI) Prepared&Analyzed:07-San-05 <br /> Manganese ND 20.. ugA — <br /> Iron ND 50 " <br /> LCS AA50704-BSI) Prepared&Analyzed:07-Jan-05 _ <br /> Manganese 996 20 ug/1 1000 100 85-115 <br /> Iron 1010 50 1000 101 85-115 <br /> Matrix Spike(AA50704-MSI) Source:4122901!01 Prepared&Analyzed 07-Jan-05 <br /> lron 1100 50 no 1000 ND )10 75-125 <br /> Manganese 1280 20 " 1000 55 122 75-125 <br /> *Matrix Spike Dup(AA50704-MSD!) Source:4122901-01 Prepared&Analyzed:07-San-05 _ <br /> Manganese 1240 20 ug/1 1000 55 118 75-125 3 20 <br /> Iron 1060 50 1000 ND 106 75-125 4 20 <br /> Batch AA52004-EPA 200 Series <br /> Blank(AA52004-BLKI) Pre arp ed&Analyzed:20-Jan-05 <br /> Silica(SiO2) ND 0.0500 mg/L <br /> L_CS(AA52004-BSl) _Prepared&Anal ed:20-Jan-05 _ <br /> Silica(SiO2) 0.503 0.0500 mg1L 0.500 101 85-115 <br /> Matrix pike(A52004-MSI) — Source:5010612-01 Prepared&Analyzed:2G-Jan-05 <br /> a(Si02) 25.0 0.0500 mg/J. 0.500 24.5 100 75-125 <br /> Matrix Spike Dap(AA520D4-MSDI) Source:5010612-DI Prepared&Analyzed;20-Jan-05 <br /> Silica(Si02) 25.1 0.0500 Wg 0.500 24.5 120 75-125 0.4 20 <br /> mr/L-miltigramsper Liter-ppm DLR-Defection Leeitfor Purpwe of&porling <br /> ug/7,-micrograms perLder-ppb gxceptional wimple matrices or mierterences may <br /> result in higher detection limits <br /> RESPECTFULLY SUBMITTED, <br /> Jonathan Lc,Laboratory Director <br /> 7743 N West Lane . Suite B2 Stockton CA. 95210 ohone: (209) 477-8105 Fax: (209) 477-8148 <br />