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Feb F�B 1w.a0022: ,ZP2PM LRLiEPRHML7 HWMP 5r 540-360 5 73 P.6 p. 4 <br /> California Department of Toxic Substances Control HML#: 0 10`-M <br /> Hazardous Materials Laboratory to:61 0qjT1 <br /> 2151 Berkeley Way, Berkeley, CA 94704 <br /> Quality Assurance <br /> PH <br /> I. Calibration Standard Data <br /> ID Vendor Lot Expiration Buffer pH my Efficiency <br /> PN Number Date Type Buffer Readin <br /> VWR 00068009 Jun-02 SOON 2 301 <br /> VW R 265 Sep-02 SOL'N 7 6.2 0.99916 <br /> R 1183 Jun-02 SOL'N 10 -164.8 0.96731 <br /> II. Laboratory Control Sample <br /> Lot pH Expected Observed Absolute <br /> Source Number Buffer Result Result Difference <br /> R 1149 5 5.00 5.05 0.05 <br /> VW R 1071 a 8.00 7.94 0.06 <br /> PH of deionized HZO used in dilution <br /> III. Laboratory Duplicate Sample Results <br /> HML Sample Sample Duplicate Absolute <br /> Number T e Result Result Difference <br /> 010450 LIQUID 6.378 6.376 0.002 <br /> ner'e� LJ�11L' <br /> ida R. Ilejay Date. S. Iskander Date <br /> Chenist Supervisor <br />