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COLUMBIA ANALYTICAL SERVICES, INC. <br /> QA/QC Report -- <br /> Client: EMCON Associates Service Request: 5950079 <br /> Project: Federated-Manteca/ Project No. 220-100.01 Date Collected: 1.23/95 <br /> Sample Matrix: Water Date Received: 1.24/95 <br /> Date Extracted: NA' <br /> Date Analyzed: 1 31/95,2/1195 <br /> Surrogate Recovery Summary <br /> BTEX and TPH as Gasoline <br /> EPA Methods 5030/8020/California DHS LUFT Method <br /> Percent Recovery <br /> Sample Name Lab Code (x,ce,ac-Trifluorototuene <br /> Influent 5950079-001 99 <br /> Effluent 5950079-002 95 <br /> Method Blank 5950131-WBI 92 <br /> Method Blank 5950201-WB1 95 <br /> CAS Acceptance Limits: 69-116 <br /> Approved By: `,/ /S <br /> Date: <br /> SURI+o M4 <br /> Page 4 <br /> ...4 [�.. . _ . C.-.n L.r-. r..liinm:_ Or Tn L...----. Ind l/nom nInn <br />