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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 (New Wells)A 24591 <br />Sample Matrix: Water <br />Surrogate Recovery Summary <br />Volatile Organic Compounds <br />Results flagged with an asterisk (*) indicate values outside control criteria. <br />Results flagged with a pound (9) indicate the control criteria is not applicable. <br />Printed: 08/15/2007 07:41:17 <br />P:%STEALTHICRY STA I.,. RPT\ Forin2.,pt <br />Sur2 Sur3 <br />98 92 <br />99 93 <br />101 95 <br />101 91 <br />101 96 <br />99 96 <br />98 95 <br />Form 2A - Organic <br />Service Request- P0700704 <br />Units: PERCENT <br />Level: Low <br />Page 1 of I <br />Superset Reference: RR.I3820 <br />Extraction Method: EPA 5030B <br />Analysis Method: 8260B <br />Sample Narne <br />Lab Code <br />Surl <br />MW -4 <br />P0700704-001 <br />92 <br />MW -5 <br />P0700704-002 <br />94 <br />TRIP BLANK <br />P0700704-003 <br />96 <br />Method Blank <br />PWG0701151-4 <br />91 <br />MW-4MS <br />PWG0701151-1 <br />92 <br />MW-4DMS <br />PWG0701151-2 <br />95 <br />Lab Control Sample <br />PWG0701151-3 <br />94 <br />Surrogate Recovery Control Limits ('%) <br />Surl = Dibromofluoromethane <br />73-129 <br />Sur2 = Toluene -d8 <br />76-122 <br />Sur3 = 4-Bromofluorobertzene <br />63-118 <br />Results flagged with an asterisk (*) indicate values outside control criteria. <br />Results flagged with a pound (9) indicate the control criteria is not applicable. <br />Printed: 08/15/2007 07:41:17 <br />P:%STEALTHICRY STA I.,. RPT\ Forin2.,pt <br />Sur2 Sur3 <br />98 92 <br />99 93 <br />101 95 <br />101 91 <br />101 96 <br />99 96 <br />98 95 <br />Form 2A - Organic <br />Service Request- P0700704 <br />Units: PERCENT <br />Level: Low <br />Page 1 of I <br />Superset Reference: RR.I3820 <br />