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COLUMBIA ANALYTICAL SERVICES, INC. <br />QA/QC Report <br />Client: Shaw Environmental & Infrastructure, Inc <br />Project: Foothill Landfill, San Joaquin County/791289 (Ground Water) <br />Sample Matrix: Water <br />Surrogate Recovery Summary <br />Volatile Organic Compounds <br />Extraction Method: EPA 5030B <br />Analysis Method: 8260B <br />Sample Name <br />Lab Code <br />Surl <br />Sur2 <br />Sura <br />MW -1 <br />P0700115-001 <br />107 <br />95 <br />83 <br />MW -2R <br />P0700115-002 <br />105 <br />95 <br />81 <br />MW -3 <br />P0700115-003 <br />110 <br />96 <br />81 <br />LW -1 <br />P0700115-004 <br />107 <br />96 <br />82 <br />FIELD BLANK <br />P0700115-005 <br />108 <br />98 <br />91 <br />TRIP BLANK <br />P0700115-006 <br />106 <br />99 <br />87 <br />Method Blank <br />PWG0700304-4 <br />108 <br />98 <br />88 <br />Batch QC <br />P0700112-002 <br />106 <br />94 <br />82 <br />Batch QCMS <br />PWG0700304-1 <br />98 <br />102 <br />98 <br />Batch QCDMS <br />PWG0700304-2 <br />100 <br />101 <br />100 <br />Lab Control Sample <br />PWG0700304-3 <br />101 <br />103 <br />108 <br />Surrogate Recovery Control Limits (%) <br />Surl = Dibromofluoromethane 77-126 <br />Sur2 = Toluene -d8 77-119 <br />Sur3 = 4-Bromofluorobenzene 74-121 <br />Service Request: P0700115 <br />Units: PERCENT <br />Level: Low <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 />Printed: 02/16/2007 11:12:40 Form 2A - Organic Page 1 of 1 <br />P:\STEALTH\CRYSTAL.RPTTonn2.rpt Superset Reference: RR13379 <br />