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California Department of oxic Substances Control HML#: 011393 to 011398 <br /> Hazardous Materials Lab ratory(Inorganic Section) Collector's No.: SB01 <br /> 2151 Berkeley Way, Berk ley, CA 94704 to: SB06 <br /> Tel No. (510) 540-3003 <br /> QUALITY ASSURANCE <br /> pH <br /> I. Calibration Standard F�le Reference: EPA Method#: 9045C <br /> Std ID Lot No. Expiration Buffer Buffer my Efficiency <br /> Vendor/PN Date Type Reading <br /> EM Science 1100 Apr-03 Liquid 4.00 188 <br /> EM Science 1105 Apr-03 Liquid 7.00 9.9 1.01440 <br /> EM Science 1183 Jun-02 Liquid 10.0 -160.9 0.97759 <br /> II. Laboratory Control Sample <br /> Analyte Lot No. Source Result Absolute Difference <br /> pH Buffer Expctd Obsrved <br /> 5.00 1149 VW R 5.00 5.02 0.02 <br /> 8.00 1071 VW R 8.00 8.02 0.01 <br /> 9.00 1038 VW R 9.00 8.99 0.01 <br /> pH of DI Water used in dild tion 6.78 <br /> III. Laboratory Duplicate ample Results <br /> HML No. Sample ample Dupl. Absolute Difference <br /> Type V,,esult Result pH Units <br /> 011394 Solid 7.51 7.53 0.02 <br /> 011398 Sludge 7.53 7.53 0.00 <br /> Analyst: Date: <br /> 4FatimaH Supervisor: Date:er <br />