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I <br />' Q UAL I T Y C O N T R O L R E S U L T S <br /> Job Number 200190 Report Date.. 01/31/2000 <br /> CUSTOMER IT Group PROJECT- Southland - Martinez ATTN Rhonda Teicheira <br /> QC TypeDescription ReaI Code Lab ID Dilution Factor Date Time <br />' Test Method EPA 82608 Batch 10827 Analyst gfb <br /> Method Description Volatile Organics by GC/MS Units . ug/L <br /> MS Matrix Spike 09120705 992712-2 12/29/1999 0733 <br /> Parameter/Test Description QC Result QC Result True Value Orig Value Calc Result * Limits F <br /> tert-Butyl Alcohol (TBA) 698 69 1000 000000 0 69 9 34-182 <br /> Di-lsopropyl Ether 50 63 50 000000 0 101 3 60-131 <br /> Ethyl tert-Butyl Ether (ETRE) 45 11 50 000000 0 90 2 64-138 <br /> tert-Amyl Methyl Ether 43 53 50 000000 0 87.1 67-154 <br /> Methyl-t-Butyl Ether (MTBE) 88 92 100 000000 1 58 87 3 71-142 <br /> 1,2-Dichloroethane 9 08 10 000000 0 90 8 70-130 <br /> 1,2-Dibromoethane (EDB) 8 94 10 00000D 0 89.4 70-130 <br /> MSD Matrix Spike Duplicate 09120705 992712-2 12/29/1999 0805 <br /> Parameter/Test Description QC Result QC Result True Value Orig Value Calc. Result * Limits F <br /> -Butyl Alcohol (TBA) 848 55 698.69 1000 000000 0 49 1934-182 <br /> 101opropyl Ether 54 80 50 63 50 000000 0 109.6 60-131 <br /> 8 24 <br /> Ethyl tert-Butyl Ether (ETBE) 50 44 45 11 50 000000 0 100 9 64-138 <br /> 11 29 <br /> tert-Amyl Methyl Ether 49 43 43 53 50 000000 0 98 9 67-154 <br /> 13 27 <br /> Methyl-t-Butyl Ether (MTBE) 99 49 88 92 100 000000 1 58 97 9 71-142 <br /> 11 31 <br />' 1,2-Dichloroethane 9 96 9 08 10 000000 0 99 6 70-130 <br /> 9 30 <br /> 1,2-Dibromoethane (EDB) 9 95 8 94 10 000000 0 99.5 70-130 <br /> 11 30 <br /> MS Matrix Spike 09123101 200108-1 01/21/2000 1750 <br /> Parameter/Test Description OC Result QC Result True Value Orig Value Calc Result * Limits F <br />' tert-Butyl Alcohol (TBA) 939 10 1000 000000 0 93 9 r 34-182 <br /> Di Isopropyl Ether 43 21 50 000000 0 86 4 60-131 <br /> Ethyl tert-Butyl Ether (ETBE) 46 92 50 000000 0 93 8 64-138 <br /> tert-Amyl Methyl Ether 47 89 50 000000 0 95 8 67-154 <br /> Methyl-t-Butyl Ether (MTBE) 98 99 100 000000 0 44 98 5 71-142 <br /> 1,2-Dichloroethane 9 67 10 000000 0 96 7 70-130 <br /> 1,2-Dibromoethane (EDB) 9 25 10 000000 0 92.5 70-130 <br /> MSD Matrix Spike Duplicate <br /> 09123101 200108-1 01/21/2000 1819 <br /> Parameter/Test Description QC Result QC Result True Value Orig Value Calc. Result * Limits F <br /> tert-Butyl Alcohol (TBA) 1154 71 939 10 1000 000000 0 115 5 _ 34-182 <br /> 21 19 Y <br />' <br /> opropyl Ether 40 44 43 21 50 000000 0 BO 9 60-131 T 24 <br /> Page 13 • %=% REC, R=RPD, A=ABS Diff., D=% Diff <br />