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I <br /> D UAL I T Y C O N T R O L R E 5 U L T S <br /> Job Number 992524 Report Date 12/14/1999 <br /> CUSTOMER IT Group PROJECT* Southland - Martinez ATTU Rhonda Teicheira <br /> QC Type Description Reag Code Lab ID Dilution Factor Date Time <br /> MS Matrix Spike 09112901 992528-1 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 34-182 <br /> Di-Isopropyl Ether 46 66 50 000000 0 93 3 60-131 <br /> Ethyl tert-Butyl Ether (ETRE) 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 I Matrix Spike Duplicate 09112901 992528-1 T <br /> 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 16 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 /> tert-Butyl Ether (ETRE) 51 50 52 57 50 000000 0 04 102 9 64-138 <br /> 2 29 <br /> tert-Amyl Methyl Ether 48 87 <br /> lie51 06 5D 000000 0 97.7 67-154 <br /> 4 27 <br /> Methyl-t-Butyl Ether (MTBE) 135 09 133 00 100 000000 5 47 129 6 71-142 <br /> 2 31 <br /> 1,2-Dichloroethane 12 81 12 95 10 000000 0 44 123.7 70-130 <br /> 1 30 <br /> 1,2-Dibromoethane (EDB) 8 68 8 20 10 000000 0 86 8 70-130 <br /> 6 30 <br /> Test Method EPA 8260B Batch 9977 Analyst . gfb <br /> Method Description Volatile Organics by GUMS Units ug/L <br /> LCS Laboratory Control Sample 09112901 12/03/1999 1008 <br /> Parameter/Test Description QC Result QC Result True Value Orig Value Calc Result * Limits F <br /> tert-Butyl Alcohol (TBA) 1075 76 1000 000000 107.6 37-175 <br /> Di-Isopropyl Ether 49 71 50 000000 99 4 60-138 <br /> Ethyl tert-Butyl Ether (ETBE) 50 81 50 000000 101 6 51-143 <br /> Itert-Amyl Methyl Ether 54 51 50 000000 109.0 64-137 <br /> Methyl-t-Butyl Ether (MTBE) 100 38 100 000000 100 4 33-169 <br /> 1,2-Dichloroethane 9 95 10 000000 99 5 70-130 <br /> 1,2-Dibromoethane (EDB) 9 62 10 000000 96.2 70-130 <br /> MB Method Blank 12/03/1999 1037 <br /> Parameter/Test Description QC Result OC Result True Value Orig Value Calc Result * Limits F <br /> tert-Butyl Alcohol (TBA) 0 <br /> opropyl Ether 0 <br /> tert-Butyl Ether (ETBE) 0 <br /> tart-Amyl Methyl Ether 0 <br /> Page 11 * X=X REC, R=RPD, A=ABS Diff D=X Diff <br />