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PRECISION <br /> ENVIRO-TECH <br /> Analytical Laboratory CERTIFICATE OF ANALYSIS <br /> ' Wednesday,March 2,2005 <br /> Attention: Francis X. Bean <br /> ' Kleinfelder, Inc. Report Page 9of2l <br /> 2825 East Myrtle Street <br /> Stockton, CA 95205 <br /> Metals by EPA 6000/7000 Series Methods-Quality Control <br /> Precision Enviro-Tech <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch AC50119-EPA 3050B <br /> Blank(AC50119-BLKI) Prepared&Analyzed:01-Mar-05 <br /> Zinc ND 0.0100 mg/kg <br /> Cadmium ND 0.00200 " <br /> ' Chromium ND 0.0100 <br /> Lead ND 0.0100 <br /> Nickel ND 0.500 " <br /> LCS(AC50119-BSI) Prepared&Analyzed:01-Mar-05 <br /> Nickel 1.00 0.500 mg/kg 1.00 100 80-120 <br /> Lead 0.999 0.0100 1.00 100 80-120 <br /> Zinc 1.01 0.0100 1.00 101 80-120 <br /> Chromium 1.00 0.0100 " 1.00 100 80-120 <br /> Cadmium 1.01 0.00200 1.00 101 80-120 <br /> Matrix Spike(AC50119-MSI) Source:5030109-01 Prepared&Analyzed:01-Mar-05 <br /> Chromium 84.3 0.500 mg/kg 50.0 43.4 82 75-125 <br /> Cadmium 42.2 0.100 50.0 ND 84 75-125 <br /> Nickel 79.0 0.500 50.0 41.0 76 75-125 <br /> Lead 62.2 0.500 50.0 22.6 79 75-125 <br /> Zinc 107 0.500 50.0 69.4 75 75-125 <br /> Matrix Spike Dup(AC50119-MSD1) Source:5030109-01 Prepared&Analyzed:01-Mar-05 <br /> Chromium 84.6 0.500 mg/kg 50.0 43.4 82 75-125 0.4 20 <br /> ' Lead 62.3 0.500 „ 50.0 22.6 79 75-125 0.2 20 <br /> Zinc 107 0.500 50.0 69.4 75 75-125 0 20 <br /> Cadmium 42.6 0.100 50.0 ND 85 75-125 0.9 20 <br /> Nickel 78.4 0.500 50.0 41.0 75 75-125 0.8 20 <br /> mg/L=miUigrams per Liter=ppm DLR=Defection Limii for Puryose of Reporting. <br /> ug/L=micrograms per Liter=ppb Exceptional sample matrices or interferences may <br /> result in higher detection limits. <br /> RESPECTFULLY SUBMITTED, <br /> Jonathan Le,Laboratory Director <br /> 774.1 N. West Lane. Sante 132 Stockton C,%I. 95210 phone: (209) 477-8105 Fat: (209) 477-8148 <br />