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+r +4r o <br /> COLUMBIA ANALYTICAL SERVICES,INC. <br /> QA/QC Report <br /> Client EMCON Service Request- K95051555 <br /> Project: ARCO#2168/EMCON Project No 1775-234 001 Date Collected. 8/15/95 <br /> Sample Matrix: Water Date Received: 8/17/95 <br /> Date Extracted: 8/24/95 <br /> Date Analyzed: 8/30/95 <br /> Duplicate Summary <br /> Oil and Grease <br /> SM 5520 C&F <br /> Units mg/L (ppm) <br /> Sample Name MW-2(53) <br /> Lab Code K9505155-002 <br /> Duplicate Relative <br /> Sample Sample Percent <br /> Analyte MRL Result Result Average Difference <br /> Oil& Grease Total 0 5 10 0 2 4 6 123(a) <br /> Oil&Grease Non-Polar 0 5 8 1 08 4 164(x) <br /> a See case narrative <br /> DUPIS1120504 <br /> Page 17 <br />