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Page 39 of 52 <br /> t C=!/Science <br /> =_nvironinental Quality Control - Spike/Spike Duplicate <br /> iaboratories, 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 82606 <br /> ' Project Newark Sierra Stockton / WR1194 <br /> Date Date MS/MSD Batch <br /> Quality Control Sample ID Matrix Instrument Prepared Analyzed Number <br /> GW-1-20-24' Aqueous GC/MS XX 02108/11 02108/11 110208501 <br /> ' Parameter MS%REC MSD%REC %REC CL RPD RPD CL Qualifiers <br /> Benzene 104 99 78-120 4 0-20 <br /> Carbon Tetrachloride 85 83 67-139 2 0-20 <br /> Chlorobenzene 98 96 80-120 2 0-20 <br /> 1,2-Dibromoethane 95 93 80-123 2 0-20 <br /> ' 12-Dichlorobenzene 95 95 76-120 0 0-20 <br /> 1,2-Dichloroethane 102 98 76-130 4 0-20 <br /> 1,1-Dichlorcethene 94 98 70-130 4 0-27 <br /> ' Ethylbenzene 98 94 73-127 4 0-20 <br /> Toluene 102 98 72-126 4 0-20 <br /> Trichloroethene 105 100 74-122 5 0-20 <br /> Vinyl Chloride 96 89 65-131 8 0-24 <br /> Methyl-t-Butyl Ether(MTBE) 92 91 69-123 1 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 />