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COLUMBIA ANALYTICAL SERVICES,INC. <br /> QA/QC Report <br /> Client EMCON Associates Service Request K950968S <br /> Proju.t Arco 760/Loas.=1775-212 01 Date Collected 2/13/95 <br /> Sample Matrix Water Date Received 2/17/95 <br /> Date Extracted 2/28/95 <br /> Date Analysed 21283/l/95 <br /> Duplicate Summary <br /> 011 and Grease Non-Polar <br /> SM 5520 B &F <br /> Units mg/L (ppm) <br /> Duplicate Relative CAS RPD <br /> Sample Sample Percent Acceptance <br /> Sample Dame Lab Code MRL Result Result Average Difference Limit <br /> NI)iO968-003 l ND ND ND <1 40 <br /> SM Standard Methods for the Examination of Water and Wastewater, 17th Ed, 1989 <br /> \pproved BN — - - - �- �"K,L{�� 1_l—, t�` � Date �1 J <br /> 'I PI1RPB7120594 <br /> 1,40SSPHC PMI 5526b&fdup 373,95 Page So- <br />