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Committed Tn)our Success <br /> Q U A L I T Y C 0 N T R 0 L R E S U L T S <br /> .lob Number 992355 Report Date 11/10/1999 <br /> CUSTOMER IT Group PROJECT: Southland - Martinez ATTN Rhonda Teicheira <br /> QC Type Description Reag Code Lab ID Dilution Factor Date Time <br /> Test Method EPA 8260B Batch 9536 Analyst gfb <br /> Method Description Volatile Organics by GC/MS Units - ug/L <br /> MS Matrix Spike 09100603 992313-7 11/04/1999 0831 <br /> Parameter/Test Description QC Result QC Result True Value Orig Value Calc Result * Limits F <br />'tert-Butyl Alcohol (TBA) 1027 67 1000 000000 0 102 B 34-182 <br /> Di-Isopropyl Ether 46 18 50 000000 0 92 4 60-131 <br /> Ethyl tert-Butyl Ether (ETRE) 50 20 50 000000 0 100 4 64-138 <br /> tert-Amyl Methyl Ether 51 06 50 000000 0 102 1 67-154 <br /> Methyl-t-Butyl Ether (MTBE) 99 77 100 000000 0 99 8 71-142 <br /> 1,2-Dichloroethane 10 13 10 000000 0 101 3 70-130 <br /> 1,2-Dibromoethane (EDB) 11 58 10 000000 0 115 8 70-130 <br /> MSD Matrix Spike Duplicate 09100603 992313-7 11/04/1999 0902 <br /> Parameter/Test Description QC Result QC Result True Value Orig Value Calc Result * Limits F <br /> Butyl Alcohol (TBA) 982 12 1027 67 1000 000000 0 98 2 34-182 <br /> 5 19 <br /> Di-Isopropyl Ether 48 47 46 18 50 000000 0 96 9 60-131 <br /> 5 24 <br /> Ethyl tert-Butyl Ether (ETBE) 55 42 50 20 50 000000 0 110 8 64-138 <br /> 10 29 <br /> tert-Amyl Methyl Ether 52 56 51 06 50 000000 0 105 1 67-154 <br /> 3 27 <br /> Methyl-t-Butyl Ether (MTBE) 101 65 99 77 100 000000 0 101 7 71-142 <br /> 2 31 <br /> 1,2-Dichloroethane 10 29 10 13 10 000000 0 102 9 70-130 <br /> 2 30 <br /> 1,2-Dibromoethane (EDB) 11 29 11 58 10 000000 0 112 9 70-130 <br /> 3 30 <br /> CV Calibration Verification 09100603 11/09/1999 1008 <br /> _ Parameter/Test Description QC Result QC Result True Value Orig Value Calc Result * Limits F <br /> tert-Butyl Alcohol (TBA) 948 17 1000 000000 95 75-125 <br /> DI-Isopropyl Ether 43 89 50.000000 88 75-125 <br /> Ethyl tert-Butyl Ether (ETBE) 48 45 50 000000 97 75-125 <br /> tert-Amyl Methyl Ether 49 27 50 000000 99 75-125 <br /> Methyl-t-Butyl Ether (MTBE) 97 12 100 000000 97 75-125 <br /> 1,2-Dichloroethane 9 24 10.000000 92 80-120 <br /> 1,2-Dibromoethane (EDB) 8 31 10 000000 83 80-120 <br /> LCS Laboratory Centro[ Sample 09100603 <br /> 11/09/1999 1038 <br /> Parameter/Test Description QC Result QC Result True Value Orig. Value Calc Result * Limits F <br /> tButyl Alcohol (TBA) 1100 85 1000 000000 110 1 37-175 <br /> sopropyl Ether 44 47 50 000000 88 9 60-138 <br /> l tert-Butyl Ether (ETBE) 48 77 50.000000 97 5 51-143 <br /> tert-Amyl Methyl Ether 49 35 50 000000 98.7 64-137 <br /> Page 15 %=% REC, R=RPD, A=ABS Diff , D=% Diff <br /> a part of <br /> SC1�ri1 fiuit�Ul�LL1In� <br />