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COLUMBIA ANALYTICAL SERVICES INC <br /> QA/QC Report <br /> �Client EMCON Associates Date Received 10/13/93 <br /> rolect DSS Construction/2481-100 01 Date Extracted 10/18/93 <br /> Sample Matrix Soil Service Request No SJ93-1 263 <br /> Surrogate Recovery Summary <br /> Hydrocarbon Scan <br /> EPA Methods 3550/California DHS LUFT Method <br /> Sample Name _Date Analyzed Percent Recovery <br /> p-Terphenyl <br /> P-1 10/21/93 95 <br /> P-2 10/21/93 72 <br /> P-3 10/21/93 89 <br /> Method Blank 10/20/93 88 <br /> CAS Acceptance Criteria 46-154 <br /> Approved by , Date <br /> i <br /> / 8 <br /> 1921 Ringwood Avenue San lose California 95131 • Telephone 4081407 2400 • Fox 4081437 9356 <br />