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aa!science <br /> iiinvironmental Quality Control - Spike/Spike Duplicate <br /> rmw aboratories, Inc. <br /> Klff Anatytical Date Received 09/10/04 <br /> 2795 2nd Street, Suite 300 Work Order No 04-09-0540 <br /> DavIS, CA 95616-6593 Preparation EPA 624 <br /> Method EPA 624 <br /> Prosect Sanchez Property <br /> Date Date NIISIMSD Batch <br /> Quality Control Sample ID Matrix Instrument Prepared Analyzed Number <br /> 0404-0607-1 Aqueous GCIMS u NIA 09/13/04 040913501 <br /> Parameter NIS%REC MSD%REC %REC CL RPD RPD CL Qualifiers <br /> Benzene 104 104 82-118 0 0-9 <br /> Carbon Tetrachloride 108 104 82-118 4 0-12 <br /> 12-Dichlorobenzene 106 97 81-117 9 019 <br /> Ethylbenzene 107 97 76-124 10 024 <br /> Tetrachloroethene 110 103 69-141 7 023 <br /> Toluene 105 103 84-114 2 0-9 <br /> Trichloroethene 104 103 81117 1 0-9 <br /> o-Xylene 106 97 76124 9 0-24 <br /> plm-Xylene 107 96 77-125 10 0-23 <br /> Methyl t-Butyl Ether(MTBE) 119 117 57-141 1 0 27 <br /> RPD-Relative Percent Difference CL Control Limit <br /> r <br /> 7440 Lincoln Way, Garden Grove, CA 92841-1427 e TEL (714) 895-5494 FAX (7�4) 894-750'! <br />