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COLUMBIA ANALYTICAL SERVICES, INC. <br /> QA/QC Report <br /> Client EMCON Associates Service Request- K950968S <br /> Project krco 760/Lodi/#1775-212 01 Date Collected. 2113/95 <br /> Sample Matrix (Vater Date Received 2117195 <br /> Date Extracted 2/2I/95 <br /> Date Analvzed 2/23/95 <br /> Duplicate Summary <br /> Total Petroleum Hvdrocarbons as Diesel <br /> California DHS Luft Method <br /> Units gg/L(ppb) <br /> Sample Name Mw-1 <br /> Lab Code K950968-001 <br /> Duplicate Relative CAS RPD <br /> Sample Sample Percent lcceptance <br /> Analyte MRL Result Result Average Difference Limit <br /> Diesel 50 526 492 509 7 40 <br /> Approved By z. Date Ci Z <br /> DUPISPPLN102194 <br /> 09685PHc ssl TPHwDU? 24/95 Pap No <br />