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' Q UAL I T Y C O N T R O L R E S U L T S <br /> Job Number 992708 Report Date 01/06/2000 <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 0912D705 992636-2 12/24/1999 0259 <br /> Parameter/Test Description QC Result QC Result True Value Orig Value Calc Result * Limits F <br /> Ethyl tert-Butyl Ether (ETRE) 52 73 57 07 50 000000 0 105 5 8 29 64-138 <br /> tert Amyl Methyl Ether 51 98 53 84 50 000000 0 91 102 1 67-154 <br /> 4 27 <br /> ethyl t-Butyl Ether (MTBE) 121 56 141 59 100 000000 20 29 101 3 71-142 <br /> 15 31 <br /> 1,2-Dichloroethane 9 90 10 26 10 000000 0 99 0 70-130 <br /> 4 30 <br /> 1,2-Dibromoethane (EDB) 9 18 10 77 10 000000 0 91 8 70-130 <br /> 16 30 <br /> LCS Laboratory Control Sample 49123101 01/04/2000 0636 <br /> Parameter/Test Description QC Result QC Result True Value Orig Value Calc Result * Limits F <br /> tafOL-Butyl Alcohol (TBA) 1090 83 1000 000000 109 1 37-175 <br /> opropyl Ether 48 73 50 000000 97 5 60-138 <br /> l tent-Butyl Ether (ETRE) 52 59 50 000000 105 2 51-143 <br /> tert-Amyl Methyl Ether 49 15 50 000000 98 3 64-137 <br /> Methyl-t-Butyl Ether (MTBE) 97 57 100 000000 97 6 33-169 <br /> 1,2-Dichloroethane 9 96 10 000000 99 6 70-130 <br /> �1,2-Dibromoethane (EDB) 9 92 10 000000 99 2 70-130 <br /> MB Method Blank { 01/04/2000 0742 <br /> Parameter/Test Description QC Result QC Result True Value Orig Value Calc Result * Limits F <br /> tert-Butyl Alcohol (TBA) 0 <br /> iDi-Isopropyl Ether 0 <br /> EthyL tert-Butyl Ether (ETBE) 0 <br /> tert-Amyl Methyl Ether 0 <br /> Methyl-t-Butyl Ether (MTBE) 0 <br /> 1,2-Dichloroethane 0 <br /> �1,2 Dibromoethane (EDB) 0 <br /> CV Calibration Verification 09123101 01/04/2000 1155 <br /> ' Parameter/Test Description QC Result QC Result True Value Orig Value Calc Result * Limits F <br /> tert-Butyl Alcohol (TBA) 1058 70 1000 000000 106 75-125 <br /> ,,,-Isopropyl Ether 47 92 50 000000 96 75-125 I <br /> Ethyl tert-Butyl Ether (ETBE) 44 43 50 000000 89 75-125 <br /> tert-Amyl Methyl Ether 42 79 50 000000 86 75-125 <br /> MethyL-t-Butyl Ether (MTBE) 85 21 100 000000 85 75-125 <br /> 1,2-Dichloroethane 9 62 - 10 000000 96 80-120 <br /> �1,2-Dibromoethane (EDB) 9 18 10 000000 92 80-1 I 20 <br /> I <br /> r I I I E <br /> I { {Page 9 *I %=% REC, R=RPD, A=ABS Diff D=% Diff <br /> E I E <br /> , <br /> I <br />