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ICOLUMBIA ANALYTICAL SERVICES,INC. <br /> QA/QC Report <br /> Client: ENSR Consulting&Engineering Service Request: S9701286 <br /> Project: Norcal/Stockton Scavenger CoJ9647-1401 Date Collected: NA <br />' Sample Matrix: Water Date Received: NA <br /> Date Extracted: NA <br /> Date Analyzed: NA <br /> I Surrogate Recovery Summary <br /> TF'H as Diesel <br /> Prep Method EPA 3510 Units PERCENT <br /> Analysis Method CA/LUFT Basis NA <br /> I Test Percent Recovery <br /> Sample Name Lab Code Notes 1-Terphenyl <br />' MW-1 59701286-001 101 <br /> MW-3 59701286-002 102 <br /> MW-4 S9701286-003 104 <br />' Method Blank 5970708 MB 104 <br /> I <br /> I <br />' CAS Acceptance Limits 50-140 <br /> WR IM205wp <br /> Page 9 <br />