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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: <br />Collector's Address <br />Site of Sampling <br />Site Address: <br />Alex Baillie <br />8800 Cal Center Drive <br />Sacramento, CA 95826 <br />Lodi Chrome <br />316 North Main Street <br />Lodi, CA 95240 <br />I. Calibration Standard Data <br />HML #: AQ00950 <br />to : AQ00959 <br />Auth.No.: 06EC0150 <br />Page 2 <br />of 2 <br />Date Collected: 1/18/2007 <br />Date Received: 1/18/2007 <br />Date Extracted: <br />Date Analyzed: 1/19/2007 <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 />351.7 <br />12.43 <br />Fisher <br />051634-24 <br />4/30/2007 <br />Liquid <br />4.00 <br />181.5 <br />97.2 <br />Fisher <br />050768-24 <br />3/31/2007 <br />Liquid <br />7.00 <br />10.4 <br />97.2 <br />Fisher <br />061288-24 <br />3/31/2008 <br />Liquid <br />10.00 <br />-164.6 <br />97.2 <br />Ricca <br />1604756 <br />4/30/2007 <br />Liquid <br />13.0 <br />-332.1 1 <br />95.6 <br />II. Laboratory Control Sample <br />Lot <br />Source Number <br />pH <br />Buffer <br />Expected <br />Result <br />Observed <br />I Result <br />Absoiutell <br />Difference <br />Alfa Aesar B15R024 <br />2.00 <br />2.00 <br />2.00 <br />0 <br />Ricca 1605453 <br />12.45 <br />12.45 <br />12.43 <br />0.02 <br />AQ00950 <br />I <br />pH of deionized H2O used in dilution <br />III. Laboratory Duplicate Sample Results <br />HML <br />Sample <br />Sample <br />Duplicate <br />Absolute <br />Number <br />Type <br />Result <br />I Result <br />Difference <br />AQ00950 <br />I <br />Liquid <br />1 9.7 <br />1 9.72 <br />1 0.02 <br />Comments: <br />/ _61- 6,1 <br />Zenaida Odion <br />�6hemist <br />D'at6 Jarnailarcha Date <br />Section Lead Chemist <br />