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Page 20 of 26 <br /> &nvironmental Quality Control - LCS/LCS Duplicate <br /> Laboratories, no. <br /> Oilfield Environmental and Compliance Date Received: N/A <br /> 307 Roemer Way Work Order No: 12-07-1428 <br /> Suite 300 Preparation: N/A <br /> Santa Maria, CA 93454-1105 Method: EPA TO-15 <br /> Project: 1203628 <br /> Date Date LCS/LCSD Batch <br /> Quality Control Sample ID Matrix Instrument Prepared Analyzed Number <br /> 095-01-021-10,324 Air GC/MS K N/A 07/27/12 120727LOI <br /> SPIKE LCS LCS LCSD LCSD <br /> Parameter ADDED CONC %REC CONC %REC %REC CL ME CL RPD RPD CL Qualifiers <br /> Acetone 25.00 30.08 120 23.95 96 50-150 33-167 23 0-35 <br /> Benzene 25.00 24.45 98 26.08 104 60-156 44-172 6 0-40 <br /> Benzyl Chloride 25.00 30.80 123 28.76 115 50-150 33-167 7 0-35 <br /> Bromodichloromethane 25.00 27.94 112 25.50 102 50-150 33-167 9 0-35 <br /> Bromoform 25.00 29.04 116 25.96 104 62-134 50-146 11 0-38 <br /> Bromomethane 25.00 29.90 120 23.46 94 50-150 33-167 24 0-35 <br /> 2-Butanone 25.00 25.01 100 25.42 102 50-150 33-167 2 0-35 <br /> Carbon Disulfide 25.00 31.09 124 23.39 94 50-150 33-167 28 0-35 <br /> Carbon Tetrachloride 25.00 29.14 117 25.06 100 64-154 49-169 15 0-32 <br /> Chlorobenzene 25.00 26.32 105 26.45 106 50-150 33-167 1 0-35 <br /> Chloroethane 25.00 31.29 125 24.66 99 50-150 33-167 24 0-35 <br /> Chloroform 25.00 26.73 107 24.26 97 50-150 33-167 10 0-35 <br /> Chloromethane 25.00 29.26 117 23.31 93 50-150 33-167 23 0-35 <br /> Dibromochloromethane 25.00 29.17 117 27.40 110 50-150 33-167 6 0-35 <br /> 0 <br /> Dichlorodifluoromethane 25.00 28.34 113 21.54 86 50-150 33-167 27 0-35 <br /> 1,1-Dichloroethane 25.00 27.40 110 26.64 107 50-150 33-167 3 0-35 <br /> 1,1-Dichloroethene 25.00 29.47 118 22.28 89 50-150 33-167 28 0-35 <br /> 1,2-Dibromoethane 25.00 27.70 111 28.04 112 54-144 39-159 1 0-36 <br /> Dichlorotetrafluoroethane 25.00 29.13 117 22.36 89 50-150 33-167 26 0-35 <br /> 1,2-Dichlorobenzene 25.00 29.99 120 27.76 111 34-160 13-181 8 0-47 <br /> 1,2-Dichloroethane 25.00 27.56 110 23.74 95 69-153 55-167 15 0-35 <br /> 1,2-Dichloropropane 25.00 23.85 95 25.72 103 67-157 52-172 8 0-35 <br /> 1,3-Dichlorobenzene 25.00 27.57 110 25.66 103 50-150 33-167 7 0-35 <br /> 1,4-Dichlorobenzene 25.00 27.92 112 25.83 103 36-156 16-176 8 0-47 <br /> c-1,3-Dichloropropene 25.00 29.67 119 28.94 116 61-157 45-173 2 0-35 <br /> c-1,2-Dichloroethene 25.00 26.13 105 27.12 108 50-150 33-167 4 0-35 <br /> t-1,2-Dichloroethene 25.00 29.19 117 23.45 94 50-150 33-167 22 0-35 <br /> t-1,3-Dichloropropene 25.00 32.48 130 29.70 119 50-150 33-167 9 0-35 <br /> Ethylbenzene 25.00 29.84 119 28.74 115 52-154 35-171 4 0-38 <br /> 4-Ethyltoluene 25.00 28.43 114 26.00 104 50-150 33-167 9 0-35 <br /> Hexachloro-1,3-Butadiene 25.00 39.14 157 31.25 125 50-150 33-167 22 0-35 ME <br /> 2-Hexanone 25.00 27.09 108 28.93 116 50-150 33-167 7 0-35 <br /> RPD-Relative Percent Difference, CL-Control Limit <br /> W4� <br /> 7440 Lincoln Way, Garden Grove, CA 92841-1427 . TEL:(714) 895-5494 . FAX: (714) 894-7501 <br />