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' COLUMBIA ANALYTICAL SERVICES, INC. <br /> QA/QC Report <br /> �-`�- Client: ARCO Products Company Service Request: 5951324 <br /> Project: 1775-237.001 /TO# 17075.00/2186 Stockton Date Collected: 10/23/95 <br /> ' Sample Matrix: Water Date Received: 10/25/95 <br /> Date Extracted: NA <br /> ' Date Analyzed: 11/3/95 <br /> Matrix Spike/Duplicate Matrix Spike Summary <br /> ' TPH as Gasoline <br /> EPA Methods 5030/California DHS LUFT Method <br /> Units: ugAL,(ppb) <br /> tSample Name: MW-i <br /> Lab Code: 5951324-001 <br /> 1! Percent Recovery <br /> CAS Relative <br /> ' Spike Level Sample Spike Result Acceptance Percent <br /> Analyte MS DMS Result MS DMS MS DMS Limits Difference <br /> Gasoline 25,000 25,000 20,000 43,000 44,000 92 96 67-121 2 <br /> 1 <br /> r <br /> DMS J&Jo6o 194 <br /> f Page 7 <br />