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Page 9 of 18 <br /> aiscience } `'c c"'jo <br /> nvironmen#al Quality Control - Spike/Spike DuplicateI III*4 <br /> • L aboratodes, Inc, .� <br /> r <br /> Kiff Analytical Date Received 05/17/05 <br /> 2795 2nd Street, Suite 300 Work Order No 05-05-1068 <br /> Davis, CA 95616-6593 Preparation EPA 624 <br /> Method EPA 624 <br /> Prosect 2575 Country Club Boulevard, Stockton <br /> Date Date MS/MSD Batch <br /> Quality Control Sample ID Matnx Instrument Prepared Analyzed Number <br /> NNW <br /> Parameter MS%REC MSD%REC %REC CL RPD RPD CLual>Fiers <br /> Benzene 96 96 86-116 1 0-9 <br /> Carbon Tetrachloride 91 92 81-129 1 0-13 <br /> 1,2-Dichlorobenzene 78 79 69-129 1 0-18 <br /> Ethylbenzene 78 79 68-134 2 0-22 <br /> Tetrachloroethene 68 69 66-144 1 0-21 <br /> Toluene 100 100 84120 0 0-9 <br /> Trichloroethene 97 96 83-119 0 0-9 <br /> o-Xylene 79 80 67-133 1 0-22 <br /> p/m-Xylena 78 79 66-138 1 0-22 <br /> Methyl-t-Butyl Ether(MTBE) 97 91 69-141 6 0-24 <br /> RPD-Relative Percent Dltterence, CI_-Control Limit <br /> 7440 Lincoln Way, Garden Grove, CA 92841-1427 . TEL{714} 895-5494 • FAX (714) 894-7501 <br />