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COLUMBIA ANALYTICAL SERVICES, INC. <br />QA/QC Report <br />Client: Shaw Environmental & Infrastructure, Inc Service Request: L0600992 <br />Project: Foothill Landfill/791289 (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 <br />Level: Low <br />Sample Name Lab Code Surl <br />Sur2 <br />Sura <br />MW -1 L0600992-001 105 <br />104 <br />98 <br />MW -2R L0600992-002 106 <br />106 <br />99 <br />MW -3 L0600992-003 109 <br />106 <br />101 <br />LW -1 L0600992-004 106 <br />104 <br />100 <br />FIELD BLANK L0600992-005 103 <br />106 <br />100 <br />TRIP BLANK L0600992-006 102 <br />107 <br />101 <br />Method Blank LWG0601249-4 104 <br />107 <br />100 <br />Batch QC L0600996-006 110 <br />112 <br />106 <br />Batch QCMS LWG0601249-1 111 <br />112 <br />112 <br />Batch QCDMS LWG0601249-2 115 <br />114 <br />114 <br />Lab Control Sample LWG0601249-3 106 <br />107 <br />109 <br />Surrogate Recovery Control Limits (%) <br />Surl = Dibromofluoromethane 77-126 <br />Sur2 = Toluene -d8 77-119 <br />Sur3 = 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. <br />26 <br />Printed: 08/03/2006 11:59:59 Form 2A - Organic <br />Page 1 of 1 <br />PASTEALTMCRYSTAL.RPT\Fotm2.rpt <br />SuperSct Reference: RR13028 <br />