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r <br />• <br />California Department of Toxic Substances Control <br />Hazardous Materials Laboratory (Inorganic Section) <br />2151 Berkeley Way, Berkeley, CA 94704 <br />Tel No. (510) 540-3003 <br />I. Calibration Standard File <br />v <br />HML # 020578 to 020578 <br />Collector's # B&C 01 to B&C 01 <br />QUALITY ASSURANCE <br />pH <br />Reference: EPA9040B <br />Source <br />Lot No. <br />Expiration <br />Buffer <br />Buffer <br />my <br />Efficiency <br />Difference <br />2.00 VW R <br />Date <br />Type <br />.0.023 <br />Reading <br />1038 Jan -03 <br />EMSCience <br />1071 <br />Mar -03 <br />Liquid <br />1.00 <br />334.2 <br />- <br />EMSCience <br />1100 <br />Apr -03 <br />Liquid <br />4.00 <br />165 <br />0.97464 <br />EMSCience <br />1105 <br />Apr -03 <br />Liquid <br />7.00 <br />-7.9 <br />0.99635 <br />EMSCience <br />2098 <br />Mar -03 <br />ILiquid <br />10.00 1 <br />-178.3 <br />0.98112 <br />EMSCience <br />37325 <br />L Ampule <br />Li uid <br />13.00 <br />1 -341.8 <br />0.94095 <br />11. Laboratory Control Sample <br />Analyte Source <br />Lot No. xpir'n. <br />Result <br />Absolute <br />pH Buffer <br />Date <br />Ex ctd Observed <br />Difference <br />2.00 VW R <br />1247 Aug -03 <br />2.00 1.977 <br />.0.023 <br />9.00 VWR <br />1038 Jan -03 <br />9.00 8.863 <br />0.037 <br />111 Laboratory Duplicate Sample Results <br />HML No. Sample <br />ISample <br />Dupl. <br />Absolute Difference <br />Type <br />Result <br />Result <br />pH units <br />020595 Liquid <br />4.21 <br />4.21 <br />0 <br />Analyst: Date: V1 03 <br />Ka hyap N. Thakore <br />Public Health Chemist I <br />Date: t t <br />G ru mail S. Sivia <br />Public Health Chemist III (Specialist) <br />