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COLUMBIA ANALYTICAL SERVICES INC. <br /> QA/QC Report <br /> Client: Shaw Environmental&Infrastructure,Inc Service Request: L0600154 <br /> Project: North County Landfill, San Joaquin County/791288(Ground Water) <br /> Sample Matrix: Water <br /> Surrogate Recovery Summary <br /> Volatile Organic Compounds <br /> Extraction Method: EPA 5030B <br /> Units: PERCENT <br /> Analysis Method: 8260B Level: Low <br /> Samnle Name Lab Code Surl Sur2 Sura <br /> G-1 L0600154-001 99 100 93 <br /> G-31) L0600154-002 101 101 95 <br /> G4 L0600154-003 100 99 94 <br /> G-5 L0600154-004 104 104 95 <br /> G-6 L0600154-005 101 103 95 <br /> FIELD BLANK L0600154-006 100 103 96 <br /> TRIP BLANK L0600154-007 102 102 94 <br /> Method Blank LWG0600419-4 101 102 94 <br /> G-IMS LWG0600419-1 98 101 98 <br /> G-IDMS LWG0600419-2 99 103 96 <br /> Lab Control Sample LWG0600419-3 101 102 95 <br /> Surrogate Recovery Control Limits(%) <br /> Surl = Dibromofluoromethane 77-126 <br /> Sur2 = Toluene-d8 77-119 <br /> Sura = 4-Bromofluorobenzene 74-121 <br /> Results flagged with an asterisk(*)indicate values outside control criteria. <br /> Results flagged with a pound(#)indicate the control criteria is not applicable. 29 <br /> Printed: 02/02/2006 15.09.19 Fuer.,,')e - - <br />