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r <br />California Department of Toxic Substances Control <br />ENVIRONMENTAL CHEMISTRY LABORATORY <br />700 Heinz Ave., Ste. 100, Berkeley, CA 94710 <br />Laboratory Quality Control Report <br />For pH <br />Collector's Name: Alex Baillie <br />Collector's Address: 8800 Cal Center Drive <br />Sacramento, CA 95826 <br />Site of Sampling: Lodi Chrome <br />Site Address: 316 North Main Street <br />Lodi, CA 95240 <br />I. Calibration Standard Data <br />HML #: A000950 <br />to : A000959 <br />Auth.No.: 06ECO150 <br />Page 2 <br />of 2 <br />Date Collected: 1/18/2007 <br />Date Received: 1/18/2007 <br />Date Extracted: <br />Date Analyzed: 1/25/2007 <br />ID Vendor <br />PN <br />Lot <br />Number <br />Expiration <br />Date <br />Buffer <br />Type <br />pH <br />Buffer <br />my <br />Reading <br />Slope <br />Fisher <br />061391-18 <br />9/30/2007 <br />Liquid <br />1.00 <br />353.1 <br />1605453 <br />Fisher <br />051634-24 <br />4/30/2007 <br />Liquid <br />4.00 <br />182.2 <br />97.6 <br />Fisher <br />050768-24 <br />3/31/2007 <br />Liquid <br />7.00 <br />10.8 <br />97.6 <br />Fisher <br />061288-24 <br />3/31/2008 <br />Liquid <br />10.00 <br />-162.4 <br />97.6 <br />Ricca <br />1604756 <br />4/30/2007 <br />Liquid <br />13.00 <br />-331.9 <br />97 <br />II. Laboratory Control Sample <br />Source <br />Lot <br />Number <br />pH <br />Buffer <br />Expected <br />Result <br />ObservedAbsolutell <br />Result <br />�ifference <br />Alfa Aesar <br />E18Q47 <br />8.00 <br />8.00 <br />8.00 <br />0.00 <br />Ricca <br />1605453 <br />12.45 <br />12.45 <br />12.43 <br />0.02 <br />Alfa Aesar <br />B15RO24 <br />2.00 <br />2.00 <br />2.00 <br />0.00 <br />A000951 <br />I <br />Solid <br />1 9.82 <br />1 9.85 <br />1 0.03 <br />pH of deionized H2O used in dilution 6.86 <br />III. Laboratory Duplicate Sample Results <br />HML <br />Sample <br />Sample <br />Duplicate <br />Absolute <br />Number <br />Type <br />Result <br />Result <br />Difference <br />A000951 <br />I <br />Solid <br />1 9.82 <br />1 9.85 <br />1 0.03 <br />Comments: <br />Ze�aida Odion Date Jarnail Garcha Date <br />C emist 'l_¢,,, �Section Lead Chemist <br />