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L� CORE LABORATORIES <br /> 0 U A L 1 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 /> j!U1_T017IR: IT Group PROJECT; Southland - Martinez OWN: Boli BOtler <br /> OC Type Description Reag. Code Lab ID Dilution Factor Date Time <br /> LCD Laboratory Control Sample Duplicate 09072801 .09/03/1499 1322 <br /> Parameter/Test Description OC Result QC Result True Value Orig Value Calc. Result * Limits F <br /> enzene 47 82 47 60 50 95 6 39-150 r <br /> 0.5 20 <br /> Ethylbenzene 50 01 52 09 50 100 0 32-160 <br /> 4 1 20 <br /> 1ethyL-t-13utyl Ether (MTBE) 248 78 251 59 250 99 5 50-150 <br /> 1 1 25 <br /> Toluene 51 18 50 06 50 102 4 46-148 <br /> 2 2 20 <br /> ylenes (total) 156 22 155 14 150 104.1 2075-125 <br /> M5 Matrix Spike 09072801 99174$-2 09/04/1499 0239 <br /> Parameter/Test Description QC Result OC Result True Value Orig. Value Calc Result * Limits F <br /> IWne 47 00 50 0 00 94 0 39-150 <br /> benzene 48 96 50 0 64 96 6 32-160 <br /> YL-t-Butyl Ether (MTBE) 253 66 250 0.00 101.5 50-150 <br /> Toluene 49 80 50 0.00 99.6 46-148 <br /> xylenes (total) 153 67 150 4.11 99 7 75-125 <br /> MSD Matrix Spike Duplicate 09072801 991748.2 T 09/04/1999 0304 <br /> Parameter/Test Description QC Result OC Result True Value Orig Value Calc. Result * Limits F <br /> enzene 47 56 47 00 50 0 00 95 1 _ 39-150 <br /> 1 20 <br /> Ethylbenzene 51 14 48 96 50 0.64 101 0 32-160 <br /> 4 20 <br /> 1ethyL-t-Butyl Ether (MTBE) 257 20 253 66 250 0.00 102 9 50-150 <br /> 1 25 <br /> Toluene 50 67 49 80 50 0 00 101 3 46-148 <br /> 2 20 <br />�ylenes (total) 159 18 153 67 150 4 11 103.4 75-125 <br /> 4 20 <br /> Test Method EPA 80218 Batch 8366 Analyst. - evil <br /> Method Descripttion Volatile Organics -Aromatics Units ug/L <br /> M8 Method Biank 09/0711999 1058 <br /> Parameter/Test Description QC Result QC Result True Value Orig Value Calc Result * Limits F <br /> Benzene 0 00 <br /> thylbenzene 0 00 <br /> ethyl-t-Butyl Ether (MTBE) 0 00 <br /> one: <br /> 0 00(total) 0 00 <br /> I <br /> Page 9 <br /> * %=X REC, R=RPD, A=ABS Diff., D=% Diff <br /> 1 T-—111-1 ras na cp Bona or ntarorelelbbs come ed m m a epon ere bBSed oan miprcnet n end 01e N sepoa.a by the dbm ar hoae e.cx a e a�cmfidenl ei—Ill rept baa bc.n mail,--10-rcm la epevo a«Ime p ate 1q <br /> axPtaasaE Ia«ecenl 1M helot alegmenl tlf('qre Labara[orpe Gore Leho etf hOwwal rn Ik.9 n0 we lMY v teomeantabon a• ns G mpNed of any lype s l I eepleWy menlellna came"to tM Or00uLIMly ffD ,Opatatlotn cI«nfiwblanaas Of <br /> -Y.1 W.cpal n w_mI 1 plawM wd Q aM[I h__W w i,Mach a mpod 1E u5ad«4W­n!p arty IN9011'"t,Op ThIs mmd VII 11uf Ing IayO[lu W 11 while w m W w thWI IM MTIttM&W—al Of CL LWb tene4 <br />