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Page 30 of 48 <br /> eurofins Quality Control -Spike/Spike Duplicate <br /> Calscience <br /> EarthCon Consultants, Inc. Date Received: 10/02/15 <br /> 2124 Main Street, Suite 200 Work Order: 15-10-0164 <br /> Huntington Beach, CA 92648-2030 Preparation: EPA 5030C <br /> Method: EPA 8260B <br /> Project: Cove Contractors/04.20090407.00 Page 5 of 5 <br /> Quality Control Sample ID Type Matrix Instrument Date Prepared Date Analyzed MS/MSD Batch Number <br /> Parameter Samole Snike MS MS MSD MSD %Rec.CL RPD RPD CL Qualifiers <br /> Conc. Added Conc. %Rec. Conc. %Rec. <br /> Benzene 4158 1000 5438 128 5546 139 78-120 2 0-20 3 <br /> Carbon Tetrachloride ND 1000 1170 117 1157 116 67-139 1 0-20 <br /> Chlorobenzene ND 1000 1128 113 1123 112 80-120 0 0-20 <br /> 1,2-Dibromoethane ND 1000 1072 107 1086 109 80-123 1 0-20 <br /> 1,2-Dichlorobenzene ND 1000 1138 114 1138 114 76-120 0 0-20 <br /> 1,2-Dichloroethane ND 1000 1235 124 1242 124 76-130 1 0-20 <br /> 1,1-Dichloroethene ND 1000 1260 126 1229 123 70-130 2 0-27 <br /> Ethylbenzene 776.6 1000 2021 124 2000 122 73-127 1 0-20 <br /> Toluene 6543 1000 8279 174 8449 191 72-126 2 0-20 3 <br /> Trichloroethene ND 1000 1102 110 1098 110 74-122 0 0-20 <br /> Vinyl Chloride ND 1000 1551 155 1544 154 65-131 0 0-24 3 <br /> 0 <br /> p/m-Xylene 3976 2000 6663 134 6593 131 70-130 1 0-30 3 <br /> o-Xylene 1824 1000 3051 123 3025 120 70-130 1 0-30 <br /> Methyl-t-Butyl Ether(MTBE) 163.2 1000 1265 110 1240 108 69-123 2 0-20 <br /> Tert-Butyl Alcohol(TBA) 426.5 5000 5629 104 5681 105 65-131 1 0-22 <br /> Diisopropyl Ether(DIPE) ND 1000 1127 113 1117 112 68-128 1 0-22 <br /> Ethyl-t-Butyl Ether(ETBE) ND 1000 1046 105 1036 104 69-123 1 0-21 <br /> Tert-Amyl-Methyl Ether(TAME) ND 1000 977.0 98 979.3 98 70-124 0 0-20 <br /> Ethanol ND 10000 17760 178 16440 164 41-155 8 0-35 3 <br /> RPD:Relative Percent Difference. CL:Control Limits <br /> 7440 Lincoln Way,Garden Grove,CA 92841-1427 • TEL:(714)895-5494 FAX:(714)894-7501 <br />