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Page 23 of 32 <br /> L;alscience <br /> Quality Control - LCS <br /> �nvironmenta/ <br /> aboratories,Inc. <br /> ERM Date Received: 04/16/14 <br /> 1277 Treat Blvd Suite 500 Work Order: 14-04-1157 <br /> Walnut Creek, CA 94597-7989 Preparation: EPA 5030C <br /> Method: EPA 8260B <br /> Project: PG&E MDI /0242722 Page 5 of 5 <br /> Quality Control Sample ID Type Matrix Instrument Date Prepared Date Analyzed LCS Batch Number <br /> 099-12-796-8388 LCS Solid GC/MS XX 04/16/14 04116/1410:35 1404161-003 <br /> Parameter Spike Added Conc.Recovered LCS%Rec. %Rec.CL ME CL Qualifiers <br /> Benzene 50.00 53.05 106 78-120 71-127 <br /> Carbon Tetrachloride 50.00 53.43 107 49-139 34-154 <br /> Chlorobenzene 50.00 54.99 110 79-120 72-127 <br /> 1,2-Dibromoethane 50.00 53.38 107 80-120 73-127 <br /> 1,2-Dichlorobenzene 50.00 54.92 110 75-120 68-128 <br /> 1,2-Dichloroethane 50.00 51.46 103 80-120 73-127 <br /> 1,1-Dichloroethene 50.00 52.40 105 74-122 66-130 <br /> Ethylbenzene 50.00 54.35 109 76-120 69-127 <br /> Toluene 50.00 53.07 106 77-120 70-127 <br /> Trichloroethene 50.00 52.17 104 80-120 73-127 <br /> Vinyl Chloride 50.00 49.63 99 68-122 59-131 <br /> p/m-Xylene 100.0 113.7 114 75-125 67-133 <br /> N <br /> o-Xylene 50.00 57.99 116 75-125 67-133 <br /> Methyl-t-Butyl Ether(MTBE) 50.00 49.24 98 77-120 70-127 0 <br /> E <br /> m <br /> Total number of LCS compounds: 14 <br /> Total number of ME compounds:0 <br /> Total number of ME compounds allowed: 1 <br /> LCS ME CL validation result:Pass <br /> RPD:Relative Percent Difference. CL:Control Limits <br /> 7440 Lincoln Way,Garden Grove,CA 92841-1427 - TEL:(714)895-5494 - FAX:(714)894-7501 <br />