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COLUMBIA ANALYTICAL SERVICES, INC. <br />QA/QC Report <br />Client: Shaw Environmental & Inftutructure, Inc Service Request: P0700704 <br />Project: Foothill Landfill, San Joaquin County (New Wells)/124591 Date Extracted: 08/07/2007 <br />Sample Matrix: Water Date Analyzed: 08/11/2007 <br />Lab Control Spike/Duplicate Lab Control Spike Summary <br />Organochlorine Pesticides <br />Extraction Method: EPA 3535 <br />Analysis Method: 8081A <br />Analyte Name <br />Lab Control Sample <br />KWG0709498-1 <br />Lab Control Spike <br />Result Expected %Rec <br />Duplicate Lab Control Sample <br />KWG0708498-2 <br />Duplicate Lab Control Spike <br />Result Expected %Rec <br />Units: ug/L <br />Basis: NA <br />Level: Low <br />Extraction Lot: KWG0708498 <br />%Rec RPD <br />Limits RPD Limit <br />alpha BHC <br />0.171 <br />0.200 <br />86 <br />0.170 <br />0.200 <br />85 <br />40-135 <br />1 <br />30 <br />beta -BHC <br />0.162 <br />0.200 <br />81 <br />0.161 <br />0.200 <br />81 <br />40-129 <br />0 <br />30 <br />gamma -BHC (Lindane) <br />0.169 <br />0.200 <br />84 <br />0.168 <br />0.200 <br />84 <br />38-138 <br />0 <br />30 <br />delta BHC <br />0.194 <br />0.200 <br />97 <br />0.196 <br />0.200 <br />98 <br />45-147 <br />1 <br />30 <br />Heptachlor <br />0.159 <br />0.200 <br />79 <br />0.154 <br />0.200 <br />77 <br />36-130 <br />3 <br />30 <br />Aldrin <br />0.101 <br />0.200 <br />50 <br />0.0909 <br />0.200 <br />45 <br />10-128 <br />10 <br />30 <br />Heptachlor Epoxide <br />0.162 <br />0.200 <br />81 <br />0.165 <br />0.200 <br />82 <br />47-126 <br />1 <br />30 <br />gamma -Chlordane <br />0.163 <br />0.200 <br />81 <br />0.166 <br />0.200 <br />83 <br />44-126 <br />2 <br />30 <br />Endosulfan 1 <br />0.163 <br />0.200 <br />82 <br />0.167 <br />0.200 <br />83 <br />27-119 <br />2 <br />30 <br />alpha -Chlordane <br />0.161 <br />0.200 <br />80 <br />0.165 <br />0.200 <br />82 <br />45-127 <br />2 <br />30 <br />Dieldrin <br />0.165 <br />0.200 <br />83 <br />0.168 <br />0.200 <br />84 <br />48-126 <br />2 <br />30 <br />4,4' -DDE <br />0.158 <br />0.200 <br />79 <br />0.167 <br />0.200 <br />83 <br />38-137 <br />5 <br />30 <br />Endrin <br />0.185 <br />0.200 <br />93 <br />0.188 <br />0.200 <br />94 <br />50-139 <br />2 <br />30 <br />Endosulfan H <br />0.167 <br />0.200 <br />83 <br />0.170 <br />0.200 <br />85 <br />31-128 <br />2 <br />30 <br />4,4' -DDD <br />0.166 <br />0.200 <br />83 <br />0,172 <br />0.200 <br />86 <br />41-139 <br />4 <br />30 <br />Endrin Aldehyde <br />0.138 <br />0.200 <br />69 <br />0.142 <br />0.200 <br />71 <br />32-113 <br />3 <br />30 <br />Endosulfan Sulfate <br />0.158 <br />0.200 <br />79 <br />0.161 <br />0.200 <br />80 <br />42-126 <br />2 <br />30 <br />4,4' -DDT <br />0.170 <br />0.200 <br />85 <br />0.177 <br />0.200 <br />89 <br />49-136 <br />4 <br />30 <br />Methoxychlor <br />0.180 <br />0.200 <br />90 <br />0.185 <br />0.200 <br />92 <br />43-143 <br />2 <br />30 <br />Toxaphene <br />1.97 <br />2.00 <br />99 <br />1.91 <br />2.00 <br />95 <br />46-158 <br />30 <br />Chlordane <br />2.16 <br />2.00 <br />108 <br />2.12 <br />2.00 <br />106 <br />54-144 <br />30 <br />Results flagged with an asterisk (") indicate values outside control criteria. <br />Percent recoveries and relative percent differences (RPD) ars determined by the software using values in the calculation which have not been rounded. <br />® 000,50 <br />Printed: 08/20/2007 11:48:41 Form 3C - Organic Page 1 of I <br />u:\StealthlCryvai.rptTora3DCC.rpt superSet Reference: RR75563 <br />4 <br />11 <br />D <br />u <br />u <br />