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Q U A L I T Y C 0 N T R 0 L R E S U L T S <br /> Job Number- 992525 Report Date.: 12/14/1999 <br /> CUSTOMER: IT Group PROJECT: Southland - Martinez ATTN: Rhonda Teicheira <br /> Q[ Type Description Reag. Code Lab ID Dilution Factor Date Time <br /> MSO 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 (TOA) 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 /> Ethyl tett-Butyl Ether (ETRE) 51.50 52.57 50.D00000 0.04 102.9 64-138 <br /> 2 29 <br /> tert-Amyl Methyt Ether 48.87 51.06 50.000000 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 /> 1,2-0ichloroethane 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 GC/MS Units. ... .......... ug/L <br /> LCS Laboratory Control Sample 09112901 J 12/03/1999 1008 <br /> Parameter/Test Description _- QC Result OC Result _True Value Orig. Value Calc. Result * Limits F <br /> tett-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 /> tort-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 /> Di-Isopropyl Ether 0 <br /> Ethyl tert-Butyl Ether (ETRE) 0 <br /> tert-Amyl Methyl Ether 0 <br /> Methyl-t-Butyl Ether (MTBE) 0 <br /> 1,2-Dichloroethane 0 <br /> 1 ,2-1)ibromoethane (EDB) 0 <br /> M5 J Matrix Spike 09112901 992478-13 <br /> 12/03/1!! 1745 <br /> Parameter/Test Description -- _ QC Result QC Result True Value Orig. Value Calc. Result ` Limits F <br /> t Butyl Alcohol (TBA) 946.01 1000.000000 0 94.6 34-182 <br /> Isopropyl Ether 50.28 50.000000 0 100.6 60-131 <br /> yl tert-Butyl Ether (ETRE) 51.19 50-000000 0 102.4 64-138 <br /> tert-Ainyl Methyl Ether- 56.78 50.000000 0 113.6 67-154 <br /> Page 13 " 6=% REC, R=RPD, A=A85 Diff-, D=% Diff. <br />