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1 � <br /> COLUMBIA ANALYTICAL SERVICES.INC. <br /> QA/QC Report <br /> Client: EMCON Sen-ice Request: K9503131 <br /> Project- ARCO Stockton 2168/TO# 17075 00/1775-234 001 Date Collected: 5/17/95 <br /> Sample Matrix: Water Date Received: 5/19/95 <br />' Date Extracted: 5/25/95 <br /> Daae Analyzed: 5/26/95 <br />' Duplicate Summary <br /> SM 5520 C&F <br /> Units m&L,(ppm) <br /> Duplicate Relative CAS RPD <br />' Sample Sample Percent Acceptance <br /> Sample Name Lab Code MRL Result Result Average Difference Lima <br /> '1W-6 (46) K9501131-001 0 5 27 8 20 7 242 29 30 <br /> 1 <br /> ' SM Standard Methods for the Examination of Water and Wastewater, 18th Ed, 1992 <br /> -Xpproved By (,��.A �.,�✓ Date <br /> M AQPO1102194 <br /> 03131PHC SPI-CMgEW&2195 Papp No <br />