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+ 4 <br /> COLUMBIA ANALYTICAL SERVICES,INC. <br /> QA/QC Report <br /> Client. EMCON Service Request: 5951019 <br /> Project 1775-220 001 /TO# 17075 00/2076 Lodi Date Collected. 8/11/95 <br /> Sample Matrix Water Date Received 8/16/95 <br /> Date Extracted. NA <br /> Date Analyzed: 8/24/95 <br /> Matrix Sptke/Duplicate Matrix Spike Summary <br /> TPH as Gasoline <br /> EPA Methods 5030/California DHS LUFT Method <br /> Units ug/L (ppb) <br /> Sample Name MW-2 (62) <br /> Lab Code S951019-002 <br /> Percent Recovery <br /> CAS Relative <br /> Spike Level Sample Spike Result Acceptance Percent <br /> Ana1vte MS DMS Result MS DMS MS DMS Licruts <br /> Difference <br /> Gasoline 250 250 ND 233 236 93 94 67-121 1 <br /> DMS1 5!060194 <br /> Page 7 <br />