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Q UAL I T Y C O N T R O L R E 5 U L T 5 <br /> Job Number 992707 Report Date 01/06/2000 <br /> CUSTOMER IT Group PROJECT Southland - Martinez ATTN Rhonda Teicheira <br /> QC Type Description Reag Code Lab ID Dilution Factor Date Time <br /> CV Calibration Verification 09111501 01/06/2000 1107 <br /> Parameter/Test Description QC Result QC Result True Value Orig Value Calc Result * Limits F <br /> enzene 50 61 50 101 85-115 <br /> thylbenzene 49 47 50 99 85-115 <br /> Methyl-t-Butyl Ether (MTBE) 245 42 250 98 70-130 <br /> oluene 51 10 50 102 85-115 <br /> ylenes (total) 154 37 150 103 85-115 <br /> MSD Matrix Spike Duplicate 09111501 992702-1 01/06/2000 1133 <br /> Parameter/Test Description QC Result QC Result True Value Orig Value Calc Result * Limits F <br /> Benzene 57 411 63 82 50 15 15 11 5 39-150 <br /> 11 20 <br /> thylbenzene 50 393 52 06 50 2 56 95 7 32-160 <br /> 11 3 20 <br /> Methyl-t-Butyl Ether (MTBE) 1168 995 1161 26 250 1043 52 50 2 50-150 <br /> 1 25 <br /> to 49 04 51 96 50 3 73 90 6 46-148 <br /> 6 20 <br /> PyLe,es (total) 163 874 166 68 150 11 83 101 4 75-125 <br /> 2 20 <br /> Test Method EPA 8260B Batch 10423 Analyst am <br /> Method Description Volatile Organics by GC/MS Units ug/L <br /> MS Matrix Spike 09112901 992556-6 12/07/1999 1705 <br /> Parameter/Test Description QC Result QC Result True Value Orig Value Calc Result * Limits F <br /> Ut-Butyl Alcohol (TBA) 1317 66 1000 000000 0 131 8 48-194 <br /> Isopropyl Ether 38 89 50 000000 0 77 8 53-149 <br /> Ethyl tert-Butyl Ether (ETRE) 43 21 50 000000 0 86 4 53-148 <br /> ert Amyl Methyl Ether 42 90 50 000000 0 85 8 49-158 <br /> ethyl t-Butyl Ether (MTBE) 111 38 100 000000 0 43 111 0 44-190 <br /> ,2-Dichloroethane 11 04 1D 000000 0 110 4 70-130 <br /> 1,2-Dibromoethane (EDB) 8 29 10 000000 0 82 9 70-130 <br /> MSD Matrix Spike Duplicate 09112901 992556-6 T <br /> 12/07/1999 1740 <br /> Parameter/Test Description QC Result QC Result True Value Orig Value Calc Result * Limits F <br /> Iert-Butyl Alcohol (TBA) 1036 41 1317 66 1000 000000 0 103 6 48-194 <br /> 124 21 Y <br /> Di-isopropyl Ether 32 89 38 89 50 000000 0 65 8 53-149 <br /> 17 15 Y <br /> thyl tert-Butyl Ether (ETRE) 35 82 43 21 50 000400 0 71 6 53-148 <br /> 19 28 <br /> Amyl Methyl Ether 36 71 42 90 50 000000 0 73 4 49-158 <br /> 16 48 <br /> yL-t-Butyl Ether (MTBE) 94 50 111 38 100 000000 0 43 94 1 44-190 <br /> 16 21 <br /> II Page 10 * X-% REC, R=RPD, A=ABS Diff , D=% Diff <br /> � I <br /> 4' <br />