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PRECISIOPT <br /> ENVIRO-T.; 'H <br /> Analytical Laboratory CER TIFICA TE OF ANAL YSIS <br /> Thursday,July 5, 2007 <br /> Attention: Wayne Mannor <br /> Sumiden Wire Products Corp. Report Page 2of5 <br /> 1412 EI Pinal Drive <br /> Stockton, CA 95208-0719 <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 AF72213-General Prep <br /> Blank(AF72213-BLK1) Prepared&Analyzed:22-Jun-07 <br /> Copper ND 0.0100 mg/kg <br /> Silver ND 0.0100 " <br /> Zinc ND 0.0100 " <br /> Vanadium ND 0.0100 " <br /> Thallium ND 0.0100 " <br /> Selenium ND 0.0100 " <br /> Antimony ND 0.0200 " <br /> Lead ND 0.0100 " <br /> Molybdenum ND 0.0100 " <br /> Chromium ND 0.0100 " <br /> Cobalt ND 0.0100 " <br /> Cadmium ND 0.00200 " <br /> Beryllium ND 0.0100 " <br /> Barium ND 0.0100 " <br /> Arsenic ND 0.0100 " <br /> Nickel ND 0.500 " <br /> LCS(AF72213-BS1) Prepared&Analyzed:22-Jun-07 <br /> Zinc 0.450 0.0100 mg/kg 0.500 90 70-120 <br /> Cobalt 0.357 0.0100 0.500 71 70-120 <br /> Vanadium 0.457 0.0100 0.500 91 70-120 <br /> Thallium 0.367 0.0100 0.500 73 70-120 <br /> Selenium 0.377 0.0100 0.500 75 70-120 <br /> Antimony 0.383 0.0200 0.500 77 70-120 <br /> Lead 0.368 0.0100 0.500 74 70-120 <br /> Arsenic 0.380 0.0100 0.500 76 70-120 <br /> Cadmium 0.362 0.00200 0.500 72 70-120 <br /> Barium 0.363 0.0100 0.500 73 70-120 <br /> Silver 0.371 0.0100 0.500 74 70-120 <br /> Chromium 0.357 0.0100 0.500 71 70-120 <br /> Copper 0.357 0.0100 0.500 71 70-120 <br /> Molybdenum 0.368 0.0100 " 0.500 74 70-120 <br /> Nickel 0.363 0.500 0.500 73 70-120 <br /> Beryllium 0.356 0.0100 0.500 71 70-120 <br /> mg/L=milligrams per Liter=ppm DLR=Detection Limit for Purpose 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 /> 3935 N. Coronado Ave Stockton CA. 95204 phone: (209) 477-8105 Fax: (209) 4711'-8148 <br />