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COLUMBIA ANALYTICAL SERVICES,INC. <br /> 4 <br /> QA/QC Report <br /> . Client: EMCON Associates Sem ice Request: S950229 <br /> Project: Federated - Manteca/2520-100.01 <br /> Date Collected: 2/21/95 <br /> Sample Matrix: Water Date Received: 2/24/95 <br /> Date Extracted: NA <br /> Date Analyzed: 3/3/95 <br /> Surrogate Rccovery Surnmary <br /> BTEX and TPH as Gasoline <br /> EPA Methods 5030/8020/California DHS L.UFT Method <br /> Percent Recovery <br /> Sample Name Lab Code U'rII AI-Trifluorotoluene <br /> Influent S950229-001 90 <br /> Effluent 5950229-002 96 <br /> Method Blank 5950303-WB 91 <br /> CAS Acceptance Limits: 69-116 <br /> i <br /> Approved By w,-_ <br /> Date: <br /> SLRIM62"4 , <br /> Page 5 <br /> 1921 Ringwood Avenue Son Jose. California 95131 Teleenone 408/437-2400 Fox 408/407-9356 <br />