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PRECISION <br /> ENVIRO-TECH <br /> Analytical Laboratory CERTIFICATE OFANALYSIS <br /> Thursday, February 2, 2006 <br /> Attention: Mike Toy <br /> Dillon & Murphy Report Page 2of3 <br /> P.O. BOX 2180 <br /> Lodi, CA 95241 <br /> Conventional Chemistry Parameters by APHA/EPA Methods- Quality Control <br /> Precision Enviro-Tech <br /> Reporting Spike Source %PEC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch AA62508-General Preparation <br /> Blank(AA62508-BLKI) Prepared:25-Jan-06 Analyzed:06-Jan-25 <br /> Nitrate as NO3 ND 1.00 mg/L <br /> LCS(AA62508-BS1) — Prepared:25-Jan-06 Analyzed:yzed:06-Jan-25 <br /> Nitrate as NO3 1.92 1.11 mg/L 70-120 <br /> Matrix Spike(AA62508-MSI) Source:6012503-01 Prepared:25-Jan-06 Analyzed:06-Jan-25 <br /> Nitrate as NO3 33.0 1.11 mg/L ND 75-125 <br /> Matrix Spike Dap(AA62508-MSDI) Source:6012503-01 Prepared:25-Jan-06 Analyzed:06-Jan-25 <br /> Nitrate as NO3 36.5 1.11 mg/L ND 75-125 10 20 <br /> ion <br /> im <br /> tw <br /> it <br /> mg,L=milligrams per Liter=ppm DLR=Detection Limit for Purpose ofReportmg. <br /> ug/L=micrograms per Liter=ppb Exceptional sample matrices or interferences may <br /> result in higher detection limits. <br />`w RESPECTFULLY SUBMITTED, <br /> 4�j/OL�r� <br /> Jonathan Le,Laboratory Director <br /> 7743 N. West Lane . Suite B2 Stockton CA. 95210 phone: (209) 477-8105 Fax_ /209) 477-8748 <br />