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Y <br /> COLUMBIA ANALYTICAL SERVICES,INC. <br /> QA/QC Report <br /> Client EtiiCON Associates Service Request: K9501041 <br /> Project ARCO/Stockton/##1775-234 01 Date Collected 2/16 95 <br /> Sample Matrix ater Date Received 2/2295 <br /> Date Extracted 2/28/95 <br /> Date Anafv7ed 312195 <br /> Duplicate Summary <br /> Oil& Grease, Non-Polar <br /> SM 5520C&F <br /> Units mg/L (ppm) <br /> Duplicate Relative CAS RPD <br /> Sample Sample Percent Acceptance <br /> Sample Name Lab Code MRL Result Result Average Difference Limit <br /> IM W-6(-17') K9501041-006 05 9 9 9 3 9 6 b 30 <br />• <br /> SM Standard Methods for the Examination of Water and Wastewater, 17th Ed 1989 <br /> Approved v Date <br /> I}UP IAAPD/]02194 <br /> 01041PHCSPI 418w }aac Page No <br /> rl0A07 <br />