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Page 42 of 48 <br /> tiff eu rofln5 Quality control - LCs <br /> Caiscir nce <br /> Conestoga-Rovers &Associates Date Received: 05/30115 <br /> 6520 Corporate Drive Work Order. 15-05-2299 <br /> Indianapolis, IN 46278-2915 Preparation: EPA 50300 <br /> Method: EPA 82608 <br /> Project: 085972-23A-5702 Page 9 of 9 <br /> quality Control Sample ID Type Matrix Instrument Date Prepared Date Analyzed LCS Batch Number <br /> 099-12-796-9740 LCS Solid GCIINS Q . 05/31/15 -05/31111.510:33 150531 L012 <br /> Parameter Spike Added Conc. Recovered LCS%Rec. %Rec.CL ME CL Qualifiers <br /> Benzene 50.00 41.47 83 78-120 71-127 <br /> Carbon Tetrachloride 50.00 42.51 85 49-139 34-154 <br /> Chlorobenzene 50.00 41.49 83 79-120 72-127 <br /> 1,2-Dibromoethane 50.00 45.31 91 80-120 73-127 <br /> 1,2-Dichlorobenzene 50.00 43.08 86 75-120 68-128 <br /> 1,2-Dichloroethane 50.00 44.69 89 80-120 73-127 <br /> 1,1-Dichloroethene 50.00 35.11 70 74-122 66-130 ME <br /> Ethylbenzene 50.00 43.75 88 76-120 69-127 <br /> Toluene 50.00 43.31 87 77-120 70-127 <br /> Trichloroethene 50.00 43.52 87 80-120 73-127 <br /> o <br /> Vinyl Chloride 50.00 40.42 81 68-122 59-131 <br /> plm-Xylene 100.0 86.26 86 75-125 67-133 <br /> o-Xylene 50.00 42.29 85 75-125 67-133 <br /> Methyl-t-Butyl Ether(MTBE) 50.00 42.42 85 77-120 70-127 <br /> Tert-Butyl Alcohol(TBA) 250.0 243.0 97 68-122 59.131 <br /> Diisopropyl Ether(DIPS) 50.00 44.13 88 78-120 71-127 <br /> Ethyl-t-Butyl Ether(ETBE) 50.00 44.59 89 78-120 71-127 <br /> Tert-Amyl-Methyl Ether(TAME) 50.00 44,25 88 75-120 68-128 <br /> Ethanol 500.0 470.1 94 56-140 42-154 <br /> Total number of LCS compounds:19 <br /> Total number of MF compounds: 1 <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 />