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• <br /> f <br /> Q UAL 1 T Y C O N T R O L R E S U L T S <br /> Job Number 200278 Report Date : 02/18/2000 <br /> CUSTOMER IT Group PROJECT- Southland - Martinez ATTN Rhonda Teicheira <br /> QC Type Description Reag Code Lab ID Dilution Factor Date Time <br /> MSD Matrix Spike Duplicate 00012401 200240-2 02/01/2000 2041 <br /> Parameter/Test Description QC Result QC Result True Value Orig Value Calc Result * Limits F <br /> rt-Butyl Alcohol (TBA) 1255 29 1263 91 1000 000000 0 125.5 34-182 <br /> 1 19 <br /> Di Isopropyl Ether 48 04 51 46 50 000000 0 96.1 60-131 <br /> 7 24 <br />�thyl tert-Butyl Ether (ETRE) 47 59 51 15 50 000000 0 95 2 64-138 <br /> 7 29 <br /> tert-Amyl Methyl Ether 48 48 52 20 50 000000 0 97 0 67 154 <br /> 7 27 <br /> 1ethyt-t-Butyl Ether (MTBE) 106 41 119 26 100 000000 0 16 106 2 71-142 <br /> 11 31 <br /> 1,2-Dichloroethane 10 08 10 68 10 000000 0 100 8 70-130 <br /> 6 30 <br /> ,2-Dibromoethane (EDB) 10 43 10 86 10 000000 0 104 3 70-130 <br /> 4 30 <br /> Matrix Spike 00012401 200262-21 02/04/2000 0914 <br /> Parameter/Test Description QC Result QC Result True Value Brig Value Calc Result * Limits F <br /> tert-Butyl Alcohol (TBA) 1158 23 1000 000000 0 115 8 48-194 <br /> i-Isopropyl Ether 62 39 50 000000 0 48 123 8 53-149 <br /> thyl tert-Butyl Ether (ETRE) 58 73 50 000000 0 117 5 53-148 <br /> ert Amyl Methyl Ether 58 80 50 000000 0 117 6 49-158 <br /> Methyl-t-Butyl Ether (MTBE) 117 29 100 000000 S 02 112 3 44-190 <br /> ,2-Dichloroethane 12 72 10 000000 0 127 2 70-130 <br /> „2-Dibromoethane (EDB) 12 28 10 000000 0 122 8 70-130 <br /> MSD Matrix Spike Duplicate 00012401 200262-21 02/04/2000 0945 <br /> Parameter/Test Description QC Result QC Result True Value Orig Value Calc Result * Limits F <br /> tert-Butyl Alcohol (TBA) 1166 45 1158 23 1000 000000 0 116 6 48-194 <br /> 1 21 <br /> i-Isopropyl Ether 64 26 62 39 50 000000 0 48 127 6 53-149 <br /> 3 15 <br /> Ethy€ tent-Butyl Ether (ETRE) 59 99 58 73 50 000000 0 120.0 53-148 <br /> 2 28 <br /> ert-Amyl Methyl Ether 59 71 58 80 50 000000 0 119 4 49-158 <br /> 2 48 <br /> llethyL-t-Butyl. Ether (MTBE) 120 03 117 29 100 000000 5 02 115 0 44-190 <br /> 2 21 <br /> ,2-Dichloroethane 12 29 12 72 10 000000 0 122 9 70-130 <br /> 3 30 <br /> 9.2-Dibromoethane (EDB) 12 05 12 28 10 000000 0 120 5 70-130 <br /> 2 30 <br /> 1� <br /> Page 12 * X=% REC, R=RPD, A=ABS Diff D=X Diff <br />