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Sequoia 680 Chesapeake Dnve Redwood City CA 94063 (650) 364-9600 FAX(650)364-9233 <br /> 404 N Wiget Lane W31nut Creek C4 94598 (510) 988 9600 FAX(510)988-9673 <br /> Analytical $19 Striker Avenue,Suite a Sacramento,CA 95834 (916) 921 9600 FAX(916)921-0100 <br /> v , A , - <br /> Y _ ..cc I <br /> N f ," r ,, k .. k i n+'ev r w.$$ri{W ^'lr}C+^^Ey hYM•Y�b h 1 k+.k� I <br /> MCO Clieil't Project ID ARCO 2130, Stockton,CA '""° <br /> t 1433 N Market Bivd Matrix Water <br /> ` <br /> Sacramento, CA 95834 x <br /> Attention Dave Foley CC Sample Group 8030299-0306 Reported Mar 24, 19984 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Ethyl- <br /> Benzene Toluene Benzene Xylenes MTBE MTBE MTBE <br /> Method. EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA 8260 EPA 8260 EPA 8260 <br /> AnalySt: L Bettencourt L Bettencourt L Bettencourt L Bettencourt LZ/E M E Manuel M W/E.M <br /> Concentration <br /> Spiked: 10 ug/L 10 ug/L 10 ug/L 30 ug/L 50 ug/L 50 ug/L 50 ug/L <br /> LCS Batch#: LCS030698 LCS030698 LCS030698 LCS030698 VMB0318S VMB0318S VMB0319S <br /> Date Prepared: 03/06/98 03/06/98 03/06/98 03/06/98 03/18/98 03/18/98 03/19/98 <br /> Date Analyzed: 03/06/96 03/06/98 03/06/98 03/06/98 03/18/98 03/18/98 03/19/98 <br /> Instrument I D.#: GCHP-2 GCHP-2 GCHP-2 GCHP-2 H6 F3 H6 <br /> LCS % <br /> Recovery: 99 98 96 95 90 82 94 <br /> Control Limits: 70-130% 70-130% 70-130% 70-130% 70-130% 70-130% 70-130% <br /> }i^r!NO-0P���°Ov. <br /> +„fh °7 k ° i ' ,'r,a .s°V . ' �! E} } l ^°' '.` F•�'r},9}'ce. „i'Y,` °3 oSi�7;.-•xrv.Y4xs�vww�a <br /> fu.3�.!t�4.i nY.C:V..,y',,✓r°r.�'x vaun.F.,ha,.°,.2f�.w,°N`:..,vmN.,e :. na,ia° na3ewew6edA3ao`c6Yn. �tea.,,,'r v„ra,.o.:u`.r,.c`,,:;�.fRaoa^h`.Ya'�n:�i:�r�f.Yer a�^'.rr`ars.°$� <br /> MS/MSD <br /> Batch#: 8030301 8030301 8030301 8030301 9803049-01 9803655-01 9803049-01 <br /> Date Prepared: 03/06/98 03/06/98 03/06/98 03/06/98 03/18/98 03/18/98 03/18/98 <br /> Date Analyzed: 03/06/98 03/06/98 03/06/98 03/06/98 03/18/98 03/18/98 03/18/98 <br /> Instrument I.D.#: GCHP-2 GCHP-2 GCHP-2 GCHP-2 H6 F3 H6 <br /> Matrix Spike <br /> %Recovery: 97 95 94 95 96 82 96 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery: 100 98 98 99 94 76 94 <br /> Relative% <br /> Difference: 30 31 42 41 81 76 81 <br /> SEQUOIA ANALYTICAL Please Note <br /> The LCS is a control sample of known,interferent free matrix that is analyzed using the same reagents, <br /> preparation and analytical methods employed for the samples The LCS%recovery data 1s used for <br /> 1 validation of sample batch h results Due to matrix effects,the QC limits for MS/MSDs are advisory only <br /> Ronald W Kobel and are not used to accept or reject batch results <br /> Project Manager/Sacramen o Laboratory <br /> 8030299 EMC <11> <br />