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I <br /> • <br /> Q UAL I T Y C O N T R O L R E S U L T S <br /> Job Number 992709 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 OC Result QC Result True Value Orig Value Calc Result * Limits F <br /> ,Benzene 50 61 50 101 85-115 <br /> Ethylbenzene _ 49 47 50 99 85-115 <br /> Methyl-t-Butyl Ether (MTBE) 245 42 250 98 70-130 <br /> Toluene 51 10 50 102 85-115 <br /> Xylenes (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 84 5 39-150 <br /> 11 20 <br /> �Ethylberzene 50 393 52 06 50 2 56 95 7 32-160 <br /> 3 20 <br /> Methyl-t-Butyl Ether (MTBE) 1168 995 1161 26 250 1043 52 50 2 50-150 <br /> 1 25 <br /> ne 49 04 51 96 50 3 73 90 6 46-148 <br /> 6 <br /> 6 20 <br /> xylenes (total) 163 874 166 68 150 11 83 101 4 75-125 <br /> 2 20 <br /> Test Method EPA B260B 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 OC Result QC Result True Value Orig Value Calc Result * Limits F <br /> Utert-Butyl Alcohol (TBA) 1317 66 1000 000000 0 131 8 48-194 <br /> Di-Isopropyl Ether 38 89 50 000000 0 77 8 53-149 <br /> Ethyl tert-Butyl Ether (ETBE) 43 21 50 000000 0 86 4 53-148 <br /> tert-Amyl Methyl Ether 42 90 50 000000 0 85 8 49-158 <br /> Methyl-t-Butyl Ether (MTBE) 111 38 100 000000 0 43 111 0 44-190 <br /> 1,2-Dichloroethane 11 04 10 000000 0 110 4 70-130 <br /> 1,2-Dibromoethane (ED8) 8 29 10 000000 0 82 9 70-130 <br /> ' 'MSD Matrix' Spike DupL i cate 109112901 992556-6 1 1 112/07/1999 1740 <br /> Parameter/Test Description QC Result QC Result True Value Orig Value Calc Result * Limits F <br /> �tert-Butyl Alcohol (TBA) 1036 41 1317 66 1000 000000 0 103 6 48-194 <br /> 24 21 Y� <br /> Di-isopropyl Ether 32 89 38 89 50 000000 0 65 8 53-149 <br /> 17 15 Y <br /> 'Ethyl tert-Butyl Ether (ETBE) 35 82 43 21 50.000000 0 71 6 53-148 <br /> 19 2$ <br /> OyTt <br /> myl Methyl Ether 36 71 42 90 50 000000 0 73 4 49-158 <br /> 16 48 <br /> Butyl Ether (MTBE) 94 50 111 38 100 000000 0 43 94 1 44-190 <br /> 16 21 <br /> € I Page 11 * %=% REC, R=RPD,'A=ABS Diff ,' D4 Diff <br /> r ' <br /> p ,F <br />