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COLUMBIA ANALYTICAL SERVICES. INC <br /> QA/QC Report <br /> Client EMCON Service Request L952305 <br />' Project- Teichert/#OF90-002 04 Date Collected NA <br /> Sample Matnx Soll Date Received NA <br /> Date Extracted NA <br />' Date Analvzcd NA <br /> Surrogate Recovery Summary <br />' BTEX and TPH as Gasoline <br /> EPA Methods 5030/8020/Modified 8015/California DHS LUFT Method <br /> Percent Recovery Percent Recovery <br /> Sample Name Lab Code 4-Bromoiluorobenzene a a a-Trifluorotoluene <br />' Sl'-1 L952305-001 88 93 <br /> Method Blank L952305-MB 106 106 <br /> 1 <br />' CAS Acceptance Limits 60-130 60-140 <br /> NA Not Applicable <br /> ApproN ed By Date <br /> SU <br /> L9523144 <br /> Page No €�5 <br /> L952303)CLS 8020:n Y19795 <br /> 6925 CANOGA AVENUE ■ CANOGA PARK CA 91303 0 818 587-5550 0 FAX 818 587-5555 <br />