Laserfiche WebLink
Department of Toxic Substances Control HML # : 931081 to 931082 <br /> Hazardous Materials Laboratory Coll . # : B-12-29-ONT-SPA <br /> 2151 Berkeley Way, Berkeley CA. 94704 to : B-12-28-TFS <br /> (510) 540-3003 <br /> Quality Assurance <br /> PH <br /> Ref : EPA Method # 9040 <br /> I . Calibration Standard Data <br /> Standard ID Expiration Buffer my <br /> Vendor/PN Lot No. Date Type Buffer Reading Efficiency <br /> Baxter MO78 3/95 Liquid 4 . 0 176. 6 <br /> Baxter AO38 4/95 Liquid 7 . 0 1. 90 0 . 99 <br /> Baxter MO38 9/94 Liquid 10. 0 -166 . 7 0 . 96 <br /> EM Science 23040 ---- Liquid 13 . 0 -325 . 8 0 . 91 <br /> II. <br /> Laboratory Control Sample <br /> Analyte Lot Results Absolute <br /> pH buffer No. Source Expected Observed Diff. <br /> 5. 00 931330 Fisher 5 . 00 5. 01 0 . 01 <br /> 8 . 00 931332 Fisher 8 . 00 7 . 98 0. 02 <br /> 12 . 0 113601 EMS 12 . 0 12 . 01 0. 01 <br /> DI H2O used in dilution 6 . 66 III <br /> III . Laboratory Duplicate Sample Results <br /> HML Sample Sample Dupl . Absolute Difference <br /> No. Type Result Result pH units <br /> 931083 solid 7 . 43 7 . 24 0 . 19 <br /> Analyst: 7i(�_ Date: <br /> Atif z an <br /> Supervisor: �, ' Date: 6 r <br /> Mila S. Iskande <br />