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Page 16 of 26 <br /> alscience <br /> nvironmental Quality Control - Spike/Spike Duplicate <br /> aboratories, Inc. <br /> Parsons Date Received: 10/23/08 <br /> 2121 North California Blvd., Suite 500 Work Order No: 08-10-2038 <br /> Walnut Creek, CA 94596-7305 Preparation: EPA 50308 <br /> Method: EPA 82608 <br /> Proiect Tracv SPCC/444692 <br /> Date Date MS/MSD Batch <br /> Quality Control Sample ID Matrix Instrument Prepared Analyzed Number <br /> COMP-6773/833/824-1 Solid GUMS XX 10/23/08 10/23/08 081023S01 <br /> Parameter MS%REC MSD%REC %REC CL RPD RPD CL Qualifiers <br /> Benzene 87 91 79-115 4 0-13 <br /> Carbon Tetrachloride 75 80 55-139 7 0-15 <br /> Chlorobenzene 78 80 79-115 3 0-17 3 <br /> 1,2-Dibromoethane 86 86 70-130 0 0-30 <br /> 1,2-Dichlorobenzene 72 72 63-123 0 0-23 <br /> 1,1-Dichloroethene 89 93 69-123 5 0-16 <br /> Ethylbenzene 83 86 70-130 4 0-30 <br /> Toluene 84 88 79-115 4 0-15 <br /> Trichloroethene 82 85 66-144 4 0-14 <br /> Vinyl Chloride 67 83 60-126 21 0-14 4 <br /> Methyl-t-Butyl Ether(MTBE) 81 89 68-128 9 0-14 <br /> Tert-Butyl Alcohol(TBA) 84 82 44-134 2 0-37 <br /> Diisopropyl Ether(DIPE) 87 90 75-123 3 0-12 <br /> Ethyl-t-Butyl Ether(ETBE) 87 91 75-117 5 0-12 <br /> Tert-Amyl-Methyl Ether(TAME) 84 89 79-115 5 0-12 <br /> Ethanol 392 419 42-138 6 0-28 3 <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 />