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1 <br /> Communed To tour Success <br /> Q UAL I T Y C O N T R O L R E S S U L T <br /> Job 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 82608 Batch 9501 Analyst gfb <br /> Method Description Volatile Organics by GC/MS Units. ug/L <br /> MS Matrix Spike 09100603 992084-2 10/14/1999 0730 <br /> Parameter/Test Description QC Result QC Result True Value Orig Value Calc Result * Limits F <br /> tert-Butyl Alcohol (TBA) 1225 24 1000 000000 0 122 5 34-182 <br /> Dl-Isopropyl Ether 52 35 50 000000 0 104 7 60-131 <br /> Ethyl Cert-Butyl Ether (ETBE) 54 30 50 000000 0 108 6 64-138 <br /> tert-Amyl Methyl Ether 53 88 50 000000 0 107 8 67-154 <br /> Methyl-t-Butyl Ether (MTBE) 104 64 100 000000 0 104 6 71-142 <br /> 1,2-Dichloroethane 10 60 10 000000 0 106 0 70-130 <br /> 1,2-Dibromoethane (EDB) 13 66 10 000000 0 136 6 70-130 X <br /> MSD Matrix Spike Duplicate 09100603 992084-2 10/14/1999 0800 <br /> Parameter/Test Description QC Result QC Result True Value Orig. Value Calc Result * Limits F <br /> -Butyl Atcohol (TBA) 1155 44 1225.24 1000 000000 0 1155 5 1934-182 <br /> 52 58 52 35 50 000000 0 105 2 60-131 <br /> Di-Isopropyl Ether 0 24 <br /> Ethyl tert-Butyl Ether (ETBE) 52 09 54 30 50 000000 0 104 2 2964-138 <br /> tert Amyl Methyl Ether 53 61 53 88 50 000000 0 101 2 67-154 <br /> 27 <br /> Methyl-t Butyl Ether (MTBE) 103 04 104 64 100 000000 0 102 0 3171-142 <br /> 1,2-Dichloroethane 10 34 10 60 10 000000 0 103 4 3070-130 <br /> 1,2-Dibromoethane (EDS) 12 94 13 66 10 000000 0 129 4 3070-130 <br /> MS Matrix Spike 09100603 992250-2 10/27/1999 0608 <br /> Parameter/Test Description QC Result QC Result True Value Orig Value Calc Result * Limits F <br /> tert-Butyl Alcohol (TBA) 1131.81 1000 000000 0 113.2 34-182 <br /> Di-Isopropyl Ether 50 00 50 000000 0 100 0 60-131 <br /> Ethyl tert-Butyl Ether (ETBE) 52 61 50 000000 0 105.2 64-138 <br />' tert-Amyl Methyl Ether 53 65 50 000000 0 107 3 67-154 <br /> Methyl-t-Butyl Ether (MTBE) 103 52 100.000000 0 103 5 71-142 <br /> 1,2-Dichloroethane 11 87 10 000000 1.58 102 9 70-130 <br /> 1,2-Dibromoethane (EDB) 13.17 10.000000 0 131 7 70-130 X <br /> MSD Matrix Spike Duplicate 09100603 992250-2 10/27/1999 0639 <br /> Parameter/Test Description QC Result QC Result True Value Orig Value Calc Result * Limits F <br /> 01sopropyL Ether 52 02 50 00 Butyl Alcohol (TBA) 1271 77 1131.81 1000 000000 0 127 2 34-182 <br /> 12 19 <br /> 50 000000 0 104.0 60-131 <br /> !. 24 <br /> Page 13 * %=Y REC, R=RPD, A=ABS Diff , D=% Diff <br /> a part of <br /> 5C\LNI I 15 kn ILI,I'll <br />