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M <br /> 1 <br /> • <br /> r I T Y C O N T R O L R E S U L T S <br /> Job Number 992528 Q UAL Report Date 12/14/1999 <br /> CUSTOMER IT Group PROJECT- Southland - Martinez ATTN Rhonda Teicheira <br /> QC Type Description Reag Code Lab ID Ditution Factor Date Time <br /> 1MSA Matrix Spike Duplicate 09112901 992556-6 T 12/07/1999 1740 <br /> Parameter/Test Description QC Result QC Result True Value Orig. Value Ca€c Result * Limits F <br />'1,2-Dibromoethane (EDB) 6 17 8 29 10 000000 0 61 7 r 70-130 X <br /> 29 30 <br /> LCS Laboratory Control Sample 09112901 12/07/1999 2017 <br /> Parameter/Test Description QC Result QC Result True Vatue Orig Value Calc Result * Limits F <br /> tert-Butyl Alcohol (TBA) 1353 73 1000 000000 135 4 37-175 <br />�Di-Isopropyl Ether 33 07 50 000000 66 1 60-138 <br /> Ethyl tent-Butyl Ether (ETBE) 37 93 50 000000 75 9 51-143 <br /> tent-Amyl Methyl Ether 45 08 50 000000 90 2 64-137 <br /> Ether (MTBE) 92 71 100 000000 92 7 33-169 <br />,Methyl-t-,,,,,yL <br /> 1,2-Dichloroethane 11 09 10 000000 110 9 70-130 <br /> 1,2-Dibromoethane (EDB) 8 29 10 000000 82 9 70-130 <br /> Method Blank 12/07/1999 2046 <br /> Parameter/Test Description QC Result QC Result True Value Orig Value Calc Result * Limits F <br /> tert-Butyl Alcohol (TBA) 0 <br /> Di-Isopropyl Ether 0 <br /> Ethyl tert-Butyl Ether (ETBE) 0 04 <br /> tert-Amyl Methyl Ether 0 <br /> Methy€-t-Butyl Ether (MTBE) 0 21 <br />�1,2-Dichtoroethane 0 <br /> 1,2-Dibromoethane (EDB) 0 <br />' MS <br /> =Matrix Spike 09112901 992528-1 T 12/08/1999 0424 <br /> Parameter/Test Description QC Result QC Result True Value Orig Value Calc Result * Limits F <br /> tert-Butyl Alcohol (TBA) 1129 43 1000 000000 0 112 9 r 34-182 <br />�Di-Isopropyl Ether 46 66 50 000000 0 93 3 60-131 <br /> Ethyl tert-Butyl Ether (ETBE) 52 57 50 000000 0 04 105 1 64-138 <br /> tert-Amyl Methyl Ether 51 06 50 000000 0 102 1 67-154 <br /> Methyl-t-Butyl Ether (MTBE) 133 00 100 000000 5 47 127 5 71-142 <br /> 1,2-Dichloroethane 12 95 10 000000 0 44 125 1 70-130 <br />�1,2-Dibromoethane (EDB) 8 20 10 000000 0 82 0 70-130 <br /> MSD Matrix Spike Duplicate 09112901 992528-1 12/08/1999 0453 <br />' Parameter/Test Description QC Result QC Result True Value Orig Value Calc Result * Limits F <br /> tert-Butyl Alcohol (TBA) 1193 18 1129 43 1000 000000 0 119 3 34-182 <br /> 5 19 <br />'Di-isopropyl Ether 42 84 46 66 50 000000 0 85 7 60-131 <br /> 9 24 <br /> 0l tert-Butyl Ether (ETBE) 51 50 52 57 50 000000 0 04 102.9 64-138 <br /> 2 29 <br />'tert-Amyt Methyl Ether 48 87 51 06 50 000000 0 97 7 67-154 <br /> 4 27 <br /> Page 16 * %=% REC, R=RPD, A=ABS Diff D=% Diff <br />