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PRTUMOH WRONG CERTIFICATE OFANALYSIS <br /> Analytical Laboratory <br /> 3935 N.Coronado Ave,Stockton CA.95204 Phone:(209)477-8105 <br /> Associated Tractor Service Project Number: Clean Up <br /> 34 N.Ventura Ave Project Name: Clean Up Work Order No.: <br /> Stockton,CA 95203 <br /> Project Manager. Larry Borell <br /> Metals by EPA 6000/7000 Series Methods-Quality Control <br /> Reporting Spike Source <br /> Analyte Result Limit Units Level Result %REC RPD Notes <br /> Matrix Spike(AC00904-MSI) <br /> Silver 49.0 0.0500 mg/kg 50.0 0.0232 98 <br /> Thallium 50.0 1.00 50.0 ND 100 <br /> Zinc 103 0.100 50.0 849 NR QM-4X <br /> Matrix Spike Dup(AC00904-MSDI) <br /> Antimony 52.4 0.0500 mg/kg 50.0 0.0175 105 3 <br /> Vanadium 49.9 0.050 50.0 15.2 69 3 QM-4X <br /> Arsenic 50.6 0.0500 50.0 1.98 97 8 <br /> Barium 51.4 0.0500 50.0 62.1 NR 3 QM-4X <br /> Beryllium 39.9 0.0500 50.0 ND 80 2 <br /> Cadmium 50.0 0.0500 50.0 0.939 98 2 <br /> Chromium 50.1 0.0500 50.0 12.1 76 3 <br /> Cobalt 50.5 0.0500 50.0 3.33 94 3 <br /> Copper 51.8 0.0500 50.0 8.31 87 4 <br /> Lead 51.3 0.0500 50.0 84.7 NR 2 QM-4X <br /> Mercury 2.62 0.100 2.50 0.0311 103 3 <br /> Molybdenum 45.5 0.0500 50.0 0.413 90 2 <br /> Nickel 52.1 0.0500 50.0 16.1 72 3 <br /> Selenium 51.3 0.100 50.0 ND 103 6 <br /> Silver 48.1 0.0500 50.0 0.0232 96 2 <br /> Thallium 49.5 1.00 50.0 ND 99 1 <br /> Zinc 101 0.100 50.0 849 NR 2 QM-4X <br /> Reference(AC00904-SRMl) <br /> Vanadium 21.2 0.050 mg/kg 20.4 104 <br /> Antimony 0.933 0.0500 0.820 114 <br /> Arsenic 1.26 0.0500 1.20 106 <br /> Barium 55.8 0.0500 51.0 109 <br /> Beryllium 0.166 0.0500 0.160 104 <br /> Cadmium 2.05 0.0500 1.94 106 <br /> Chromium 8.80 0.0500 8.40 105 <br /> Copper 11.9 0.0500 11.2 105 <br /> Lead 1.75 0.0500 1.70 103 <br /> Molybdenum 1.95 0.0500 1.88 103 <br /> Nickel 8.91 0.0500 8.45 105 <br /> Selenium 3.79 0.100 3.52 108 <br /> CA14w� <br /> Approved By <br /> Precision Enviro-Tech. - California D.O.H.S.Cert.#2387 <br /> Page 7 of 12 <br />