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California Department of Health Services HML #: 902606 to <br /> Hazardous Materials Laboratory Coll . #: 2325-5-1-91-1 <br /> 2151 Berkeley Way, Berkeley, CA 94704 to: <br /> Tel . No . ( 415) 540-3003 <br /> Quality Assurance <br /> Pa <br /> I . Calibration Standard Data Reference= EPA Method 9040 <br /> Standard ID Expiration Buffer my <br /> Vendor/PN Lot No . Date Type Buffer Reading Efficiency <br /> Baxter 844910 10-30-91 Liquid ( 7 .00 - 25 . 5 <br /> Baxter 1806909 01-25-91 Liquid 10.00 -237 . 8 1 . 1617 <br /> Merck 3203797a Liquid 13 .00 -428 . 9 1 .0886 <br /> II . Laboratory Control Sample <br /> Analyte Lot Result Absolute Acceptability <br /> pH buffer No. Source Expcted Obsrved Diff. Limit, Diff . <br /> 8 .00 70304 pHydriori 8 .00 7 . 887 0. 113 <br /> 12 .00 82409 pHydrion 12 .00 11 . 854 0. 146 <br /> pH of DI H2O used in dilution <br /> III . Laboratory Duplicate Sample Results <br /> HML Sample Sample Dupl. Absolute Difference Acceptability <br /> No . Type Result Result pH units Limit, Diff. <br /> 902606 LIQUID 10. 268 10. 268 0.000 <br /> Analyst --- .. Date :& 13 <br /> Z Saida Odion <br /> Supervisor: Date : 6j71w/ <br /> Milad S . Iskander <br />