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Page 30 of 59 ' <br /> alscience ACC,, <br /> nvironmental Quality Control - Spike/Spike Duplicate 4 <br /> Aw aboratories, Inc. <br /> GeoSyntec Consultants Date Received: 08/20/08 <br /> 475 14th Street, Suite 450 Work Order No: 08-08-1731 , <br /> Oakland, CA 94612-1940 Preparation: EPA 5030B <br /> Method: EPA 8260B <br /> Project Western Farm Service - Vernalis <br /> Date Date MS/MSD Batch <br /> Quality Control Sample ID Matrix Instrument Prepared Analyzed Number <br /> MW-2 Aqueous GC/MS'o 08/25/08 08/25/08 080825501. <br /> Parameter MS%REC MSD%REC %REC CL RPD RPD CL Qualifiers ' <br /> Benzene 102 102 88-118 1 0-7 ' <br /> Carbon Tetrachloride 82 84 67-145 3 0-11 <br /> Chlorobenzene 102 103 88-118 0 0-7 <br /> 1,2-Dibromoethane 95 111 70-130 15 0-30 <br /> 1,2-Dichlorobenzene 101 105 86-116 4 0-8 ' <br /> 1,1-Dichloroethene 83 81 70-130 3 0-25 <br /> Ethylbenzene 110 108 70-130 2 0-30 <br /> Toluene 100 103 87-123 3 0-8 ' <br /> Trichloroethene 98 99 79-127 1 0-10 <br /> Vinyl Chloride 114 112 69-129 2 0-13 <br /> Methyl-t-Butyl Ether(MTBE) 73 89 71-131 20 0-13 4 <br /> Tert-Butyl Alcohol(TBA) 72 108 36-168 40 0-45 ' <br /> Diisopropyl Ether(DIPE) 95 102 81-123 7 0-9 <br /> Ethyl-t-Butyl Ether(ETBE) 89 101 72-126 12 0-12 <br /> Tert-Amyl-Methyl Ether(TAME) 89 107 72-126 18 0-12 4 ' <br /> Ethanol 72 94 53-149 27 0-31 <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 />