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COULAB CORE LABORATORIES <br /> Q U A L I T Y C 0 N T R 0 L R E S U L T S <br /> Job Number 991748 Report Date. 09/09/1999 <br /> CUSTOMER, IT Group PR(]JECT• Southland - Martinez ATTN: Bob Butter <br /> QC Type Description Reag Code Lab ID Dilution Factor Date Time <br /> MSD I:NiEr:1:)(:Spike Duplicate ==0082501 994745-15 09/01/1999 1655 <br /> Parameter/Test Description QC Result QC Result True Value Orig Value Calc Result * Limits F <br /> 2-Dibromoethane (EDB) 9 73 9 73 10 000000 0 97.3 70-130 <br /> 0 30 <br /> Test Method. . . EPA 8260B Batch 8318 Analyst gfb <br /> Method Description Volatile Organics by GC/MS Units ug/L <br /> LCS Laboratory Control Sample 09082501 09/02/1999 1617 <br /> Parameter/Test Description QC Result QC Result True Value Orig Value Calc Result * Limits F <br /> rt-Butyl Alcohol (TBA) 1207 00 1000 000000 120 7 37-175 <br /> 1-IsopropyL Ether 49 71 50 000000 99 4 60-138 <br /> hyl tert-Butyl Ether (ETBE) 47 76 50 000000 95 5 51-143 <br /> tert-Amyl Methyl Ether 48 18 50.000000 96 4 64-137 <br /> l-t-Butyl Ether (MTBE) 95 76 100 000000 95 8 33-169 <br /> chloroethane 10 32 10 000000 103 2 70-130 <br /> ibromoethane (EDS) 9 70 10 000000 97 0 70-130 <br /> MB Method Blank 09/02/1499 1,645 <br /> Parameter/Test Description QC Result QC Result True Value Orig Value Calc Result IN Limits F <br /> thyt <br /> rt-Butyl Alcohol (TBA) 0 <br /> -Isopropyl Ether 0 <br /> tert-Butyl Ether (ETBE) 0 <br /> tent-Amyl Methyl Ether 0 <br /> ethyl-t-Butyl Ether (MTBE) 0 <br /> ,2-Dichloroethane 0 <br /> ,2-Dibromoethane (EDB) 0 <br /> MS Matr,x Spike 09082501991758-1 09/02/1999 2133 <br /> Parameter/Test Description QC Result QC Result True Value Orig Value Calc Result * Limits F <br /> tert-Butyl Alcohol (TBA) 1061 48 1000 000000 0 106 1 34-182 <br /> I-Isopropyl Ether 47 10 50 000000 0 94 2 60-131 <br /> hyl tert-Butyl Ether (ETBE) 49 38 50.000000 0 98 8 64-138 <br /> rt-AmyL Methyl Ether 56 27 50 000000 0 112 5 67-154 <br /> Methyl-t-Butyl Ether (MTBE) 94 55 100 000000 0 94 5 71-142 <br /> 1 <br /> 2-Dichloroethane 14 96 10 000000 0 149 6 70-130 X <br /> ,2-Dibromoethane (EDB) 10 96 10 000000 0 109 6 70-130 <br /> 1 <br /> Page 12 <br /> * %=% REC, R=RPD, A=ABS Diff , D=% Diff <br /> T-gne111-1 rewha aP"Ypt6 O<nterpretalians—W.-r,Ibis report ere based eppn impnelion uW material suppled�'Ins.1-1 for wfw9e er,—and oonlyd ,H —rh s sport ILLS—meds Tne enarytcal 111 1-1—Or mteryrelalwna <br /> eea—tt—tmoot Ing O t wgmenl of Care Laaratorrea Core lahoralongs Iqw.——kits no wazrenry Or ropresanWa eapreae Or anpeea a'any type end eaOrea ly d BGaene game as to the po j My P O,O,gtb,e Otte Or wortaMeOesa of <br /> env ul ass Cog!U otrrer mneral PrmPerry wee w sena n­on yren.r wch report a used or r W W upon V e y reason xTYI GOgvN TftU rgp,rt OWN not Oe rePMULe d In wrote or n part vnrhgrt the—n a Mal of Core L bomt— <br />