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• Page 38 of 52 <br /> alscience ' <br /> �_nvironmental Quality Control - Spike/Spike Duplicate <br /> L aboratories, Inc. ' <br /> GeoSyntec Consultants Date Received: 02/05/11 , <br /> 475 14th Street, Suite 450 Work Order No: 11-02-0383 <br /> Oakland, CA 94612-1940 Preparation: EPA 5030C <br /> Method: EPA 8260B ' <br /> Project Newark Sierra Stockton /WR1194 <br /> Date Date MS/MSD Batch ' <br /> Quality Control Sample to Matrix Instrument Prepared Analyzed Number <br /> 11-02-0386-1 Aqueous GC/MS XX 02/07111 02/07/11 110207501 <br /> Parameter MS%REG MSD°/REC %REC CL RPD RPD CL Qualifiers ' <br /> Benzene 99 100 78-120 1 0-20 ' <br /> Carbon Tetrachloride 83 86 67-139 4 0-20 <br /> Chlombenzene 95 96 80-120 0 0-20 <br /> 1,2-Dibromoethane 93 94 80-123 1 0-20 <br /> 1,2-Dichlorobenzene 94 94 76-120 1 0-20 ' <br /> 1,2-Dichloroethane 98 98 76-130 0 0-20 <br /> 1,1-Dichloroethene 92 90 70-130 3 0-27 <br /> Ethylbenzene 94 95 73-127 1 0-20 ' <br /> Toluene 98 98 72-126 1 0-20 <br /> Tdchloroethene 100 100 74-122 0 0-20 <br /> Vinyl Chlodde 94 92 65-131 2 0-24 <br /> Methyl-t-Butyl Ether(MTBE) 91 92 69-123 0 0-20 ' <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 /> 1 <br />