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CASTLE ANALYTICAL-LABORATORY <br /> Environmental Testing Services 2333 Shuttle Drive,Atwater,CA 95301 Phone: (209)384-2930 <br /> Certificate No,2480 Fax: (209)384-1507 <br /> Pacific Gas&Electric Company Client Project ID:17110 Carrolton Road Received:07-19-11 <br /> 911 W.J Street Lab Reference Number:H1071901 Reported:07-20-11 <br /> Oakdale,Ca 95361 Customer Number-662 <br /> Attn:Wayne Pacheco P.O.Number:N/A <br /> Polychlorinated Biphenyls(PCBs)as Aroclors <br /> Extracted by EPA method 3550 Analyzed by EPA method 8082 <br /> The following QC data applies to samples PHI 070255-PHI 070267 <br /> from Lab report#H1071901 <br /> Batch Preparation Date:07-19-11 <br /> MATRIX SPIKES: <br /> SPIKED SAMPLE: PH1070267 MS,MSD,LCS spiked with Aroclor 1260 <br /> SAMPLE SPIKE <br /> RESULT ADDED RESULT PERCENT RECOVERY SURROGATE <br /> (mg/kg) (mg/kg) (mg/kg} RECOVERY LIMITS RECOVERY <br /> MS 0.000 0.500 0.513 103% 70%-130% 119% <br /> MSD 0.000 0.500 0.528 106% 70%-130% 121% <br /> RPD: 2.9% <br /> RPD LIMIT: 20% <br /> LCS: <br /> SPIKE <br /> ADDED RESULT PERCENT RECOVERY SURROGATE <br /> (mg/kg) (mg/kgs <br /> RE <br /> COVERY LIMITS RECOVERY <br /> 0,500 0.557 111% 80%-120% 122% <br /> BLANK: <br /> SURROGATE RECOVERY: 126% <br /> AROCLOR RESULT REPOPRTING LIMIT <br /> 1221 NO <0,3 mg/kg <br /> 1016 ND <0.3 mg/kg <br /> 1232 ND -0,3 mg/kg <br /> 1242 NO <0.3 mg/Kg <br /> 1248 ND <0,3 mg/kg <br /> 1254 ND <0.3 mg/kg <br /> 1260 ND <0.3 mg/kg <br /> 1268 ND <0.3 mg/kg <br /> NOTE:Surrogate compound is 2,4,5,6 Tetrachloro-M-Xylene <br /> APPROVED BY: j 7-/ <br /> James . illips/Laboratory Director or <br /> 11 <br /> C/o * Cone ILaboratory Manager <br /> .7/1 ?=-le <br />