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COLUMBIA ANALYTICAL SERVICES,INC. <br /> QA/QC Report <br /> Client: EMCGN Associates Service Request: S950193 <br /> Project: Federated-Manteca/Project No. 2520-100.01 Date Collected: 2/14195 <br /> Sample Matrix: Water Date Received: 2/16/95 <br /> Date Extracted: NA <br /> Date Analyzed: 2/24/95 <br /> Surrogate Recovery Summary <br /> BTEX and TPH as Gasoline <br /> EPA Methods 5030/8020/California DHS LUFI'Method <br /> Percent Recovery <br /> Sample dame Lab Code cx,oc,cx-Trifluorotoluenc <br /> Influent 5950193-001 101 <br /> Effluent S950193-002 97 <br /> Method Blank 5950224-WB1 98 <br /> CAS Acceptance Limits: 69-116 <br /> Approved B}': Date: -:T, <br /> suRM62"4 <br /> Page 4 <br /> 1921 Ringwood Avenue • San Jose, Colifomio 95131 • Teleohone 4081407-2400 • Fox 4081407-9056 <br />