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Page 19 of 24 <br /> I &;!!!science <br /> �_nvironmental Quality Control - LCS/LCS Duplicate <br /> aboratories, Inc. <br /> Kiff Analytical Date Received: N/A <br /> 2795 2nd Street, Suite 300 Work Order No: 07-02-0255 <br /> Davis, CA 95616-6593 Preparation: EPA 35106 <br /> Method: EPA 8270C <br /> Project: Unocal Op Unit <br /> Date Date LCS/LCSD Batch <br /> Quality Control Sample ID Matrix Instrument Prepared Analyzed Number <br /> 095-01-003-2,087 Aqueous GC/MS N 02/07107 02/08107 070207L04 <br /> Parameter LCS%REC LCSD%REC %REC CL RPD RPD CL Qualifiers <br /> Phenol 38 31 4-142 21 0-24 <br /> 2-Chlorophenol 92 82 53-113 11 0-17 <br /> 1,4-Dichlorobenzene 77 66 50-122 15 0-19 <br /> N-Nitroso-di-n-propylamine 90 82 56-146 10 0-22 <br /> 4-Chloro-3-Methylphenol 93 86 55-121 8 0-18 <br /> ' Acenaphthene 106 104 55-139 2 0-17 <br /> 4-Nitrophenol 32 28 1-145 14 0-29 <br /> 2,4-Dinitrotoluene 78 79 41-161 1 0-22 <br /> Pentachlorophenol 67 66 34-130 2 0-23 <br /> Pyrene 136 128 38-170 6 0-27 <br /> 1,2,4-Trichlorobenzene 82 74 49-121 11 0-19 <br /> RPD-Relative Percent Difference, CL-Control Limit <br /> 7440 Lincoln Way, Garden Grove, CA 92841-1427 . TEL:(714) 895-5494 . FAX: (714) 894-7501 <br />