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California Department of Health Services HML # = 911966 to 911968 <br /> Hazardous Materials Laboratory Coll . # : LMT4279-1A <br /> 2151 Berkeley Way, Berkeley, CA 94704 to: LMT4279-7A <br /> Tel. No. (510) 540-3003 <br /> Ouality Assurance <br /> pH <br /> I.Calibration Standard Data Reference: EPA Method 9040 and 9045 <br /> Standard ID Expiration Buffer my <br /> Vendor/PN Lot No. Date Type Buffer Reading Efficiency <br /> Fisher 91328818 12/ 192 Liquid 1. 00 309 . 4 <br /> Baxter 453102 2-25-93 Liquid 4 . 00 150. 6 0. 90664 <br /> Baxter 432101 2-04-93 Liquid 7 . 00 - 29 . 2 1. 0271 <br /> Baxter 411012 7-02-92 Liquid 10 . 00 -218 . 5 1. 0791 <br /> II. Laboratory Control Sample <br /> Analyte Lot Result Absolute Acceptability <br /> pH buffer No. Source Expcted Obsrved Diff. Limit, Diff. <br /> 2 . 00 916004-24 Fisher 2 . 00 1. 96 0. 04 <br /> 5. 00 921843-24 Fisher 5. 00 4 . 99 0 . 01 <br /> 8 . 00 913906-18 Fisher 8 . 00 8 . 02 0. 02 <br /> pH of DI H2O used in dilution 6. 15 <br /> III . Laboratory Duplicate Sample Results <br /> HML Sample Sample Dupl . Absolute Difference Acceptability <br /> No. Type Result Result pH units Limit, Diff. <br /> 911967 Sludge 6 . 73 6. 65 0. 08 <br /> 911971 Soil 3 . 19 3 . 18 0. 01 <br /> Analyst: 4�L Date: S �-2 <br /> Z' naida Odion <br /> Supervisor: Date: <br /> Milad S. Iskander <br />