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Ift <br /> L, <br /> COLUMBIA ANALYTICAL SERVICES,INC. <br /> QA/QC Report <br /> 0 Client: EMCON Service Request K9501041 <br /> Project: ARCO/Stockton/#1775-234 01 Date Collected: 2/16/95 <br /> Sample Matnx Water Date Received* 2/22/95 <br /> Date Extracted: NA <br /> Date Analyzed 3/1/95 <br /> Matrix Spike/Duplicate Matrix Spike Summary <br /> Halogenated Volatile Orgaruc Compounds <br /> EPA Methods 5030A/601 <br /> Units µg/L(ppb) <br /> Sample Name MW-1(54') <br /> Lab Code K9501041-001 <br /> Percent Recovery <br /> CAS Relative <br /> Spike Level Sample Spike Result Acceptance Percent <br /> Analyte MS DMS Result `1S DMS MS DMS Limits Difference <br /> 1,1-Dlchloroethene 20 20 ND 20 21 98 103 28-167 5 <br /> Trichloroethene 20 20 ND 19 21 96 103 35-146 7 <br /> Tetrachloroethane 20 20 ND 19 20 94 98 26-162 5 <br /> I <br /> Approved By Date 3 ZP `� r <br /> DMSIS/102194 <br /> 01041VOAJGI DMSIS 318!95 Par SO <br /> UOG13 <br />