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COLUMBIA ANALYTICAL SERVICES, INC. <br />QA/QC Report <br />CIient- Shaw Environmental & Infrastructure, Inc Service Request: P0700704 <br />Project: Foothill Landfill, San Joaquin County (New Wells)/ 124591 Rate Extracted: 08/06/2007 <br />Sample Matrix: Water Date Analyzed: 08/16/2007 - <br />08/28/2007 <br />Lab Control Spike/Duplicate Lab Control Spike Summary <br />Semi -Volatile Organic Compounds by GCIMS <br />Extraction Method: EPA 3520C <br />Analysis Method: 82700 <br />Analyte Name <br />Lab Control Sample <br />KWG0708458-4 <br />Lab Control Spike <br />Result Expected %Rec <br />Duplicate Lab Control Sample <br />KWG0708458-5 <br />Duplicate Lab Control Spike <br />Result Expected %Rec <br />Units: ug/L <br />Basis: NA <br />Level: Low <br />Extraction Lot: KWG0708458 <br />%Rec RPD <br />Limits RPD Limit <br />N-Nitrosomethylethylamine <br />91.0 <br />100 <br />91 <br />98.9 <br />100 <br />99 <br />67-102 <br />8 <br />30 <br />Methyl Methanesulfonate <br />77.3 <br />100 <br />77 <br />83.2 <br />100 <br />83 <br />70-130 <br />7 <br />30 <br />N-Nitrosodiethylamine <br />77.8 <br />100 <br />78 <br />95.0 <br />100 <br />95 <br />63-107 <br />20 <br />30 <br />Ethyl Methanesulfonate <br />93.9 <br />100 <br />94 <br />96.0 <br />100 <br />96 <br />67-100 <br />2 <br />30 <br />Acetophenone <br />76.1 <br />100 <br />76 <br />84.4 <br />100 <br />84 <br />49-125 <br />10 <br />30 <br />N-Nitrosopyrrolidine <br />89.1 <br />100 <br />89 <br />95.5 <br />100 <br />96 <br />60-112 <br />7 <br />30 <br />o -Toluidine <br />89.1 <br />100 <br />89 <br />105 <br />100 <br />105 <br />56-107 <br />16 <br />30 <br />N-Nitrosopiperidine <br />83.8 <br />100 <br />84 <br />92.5 <br />100 <br />93 <br />66-105 <br />10 <br />30 <br />0,0,0-Triethyl Phosphorothioate <br />73.4 <br />100 <br />73 <br />86.8 <br />100 <br />87 <br />65-106 <br />17 <br />30 <br />2,6-Dichlorophenol <br />75.3 <br />100 <br />75 <br />87.4 <br />.100 <br />87 <br />56-136 <br />15 <br />30 <br />Hexachioropropene <br />49.7 <br />100 <br />50 <br />52.4 <br />100 <br />52 <br />10-135 <br />5 <br />30 <br />N-Nitrosodi-n-butylamine <br />88.9 <br />100 <br />89 <br />94.1 <br />100 <br />94 <br />65-104 <br />6 <br />30 <br />Safrole <br />74.9 <br />100 <br />75 <br />87.2 <br />100 <br />87 <br />69-102 <br />15 <br />30 <br />1,2,4,5-Tetrachlorobenzene <br />78.6 <br />100 <br />79 <br />82.5 <br />100 <br />82 <br />10-136 <br />5 <br />30 <br />Isosafrole <br />68.7 <br />100 <br />69 <br />75.6 <br />100 <br />76 <br />10-147 <br />10 <br />30 <br />1,4 -Naphthoquinone <br />101 <br />100 <br />101 <br />111 <br />100 <br />ill <br />44-172 <br />9 <br />30 <br />1,3-Dinitrobenzene <br />93.5 <br />100 <br />94 <br />107 <br />100 <br />107 <br />61-134 <br />14 <br />30 <br />Pentachlorobenzene <br />80.3 <br />100 <br />80 <br />78.6 <br />100 <br />79 <br />36-150 <br />2 <br />30 <br />1 -Naphthylamine <br />48.6 <br />100 <br />49 <br />65.1 <br />100 <br />65 <br />25-91 <br />29 <br />30 <br />2 -Naphthylamine <br />62.4 <br />100 <br />62 <br />91.8 <br />100 <br />92 <br />34-133 <br />38 <br />* <br />30 <br />5 -Nitro -o -toluidine <br />102 <br />100 <br />102 <br />113 <br />100 <br />113 <br />66-129 <br />10 <br />30 <br />Diphenylamine <br />188 <br />200 <br />94 <br />190 <br />200 <br />95 <br />67-115 <br />1 <br />30 <br />1,3,5-Trinitrobenzene <br />114 <br />100 <br />114 <br />123 <br />100 <br />123 <br />41-173 <br />8 <br />30 <br />Phenacetin <br />107 <br />100 <br />107 <br />103 <br />100 <br />103 <br />77-114 <br />4 <br />30 <br />Diallate <br />104 <br />100 <br />104 <br />111 <br />100 <br />ill <br />70-130 <br />6 <br />30 <br />4-Aminobiphenyl <br />84,5 <br />100 <br />85 <br />103 <br />100 <br />103 <br />26-135 <br />20 <br />30 <br />Pronamide <br />98.4 <br />100 <br />98 <br />101 <br />100 <br />101 <br />64-108 <br />2 <br />30 <br />Pentachloronitrobenzene <br />92.8 <br />100 <br />93 <br />87.7 <br />100 <br />88 <br />73-111 <br />6 <br />30 <br />Methapyrilene <br />74.8 <br />100 <br />75 <br />75.6 <br />100 <br />76 <br />10-143 <br />1 <br />30 <br />Isodrin <br />94.5 <br />100 <br />94 <br />92.8 <br />100 <br />93 <br />72-101 <br />2 <br />30 <br />p -Dimethylaminoazobenzene <br />92.5 <br />100 <br />92 <br />94.8 <br />100 <br />95 <br />75-112 <br />2 <br />30 <br />ChlorobenziIate <br />91.2 <br />100 <br />91 <br />92.6 <br />100 <br />93 <br />74-105 <br />1 <br />30 <br />3,3'-Dimethylbenzidine <br />49.3 <br />100 <br />49 <br />72.1 <br />100 <br />72 <br />10-159 <br />38 <br />* <br />30' <br />2 -Acetylaminofluorene <br />103 <br />100 <br />103 <br />92.4 <br />100 <br />92 <br />70-128 <br />11 <br />30 - <br />7,12-Dimethylbewz a)anthracene <br />51.1 <br />100 <br />51 * <br />84.7 <br />100 <br />85 <br />59-118 <br />50 <br />* <br />30 <br />Results nagged with an asterisk (k) indicate values outside control criteria <br />Percent recoveries and relative percent differences (RPD) are determined by the software using values in the calcuia m which have not been rounded. <br />110 <br />Printed: 08/30/2007 14:43:06 Tbrm 3C - Organic <br />w\Stealth\CrystaLrpAFomiSDLC.rpt Superset Reference: RR76030 <br />0abo <br />Page 1 of 2 <br />k- <br />r - <br />L <br />Ci <br />h <br />n <br />0 <br />r <br />u <br />