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Sequoias 680 Chesapeake Drive 2edwood City, CA 94063 (415) 364-9600 PAX (415) 3649233 <br /> 404 N. Wiget Labe Walnut Creek.CA 94598 - (510) 988-9600 FAX(510)988-9673 <br /> n alS7�7 Cal 319 Striker Avenue,Suite 8 Sacramento, CA 95834 (916) 911-9600 FAX(916) 921-01W <br /> ;•:::.:: <br /> 'Delta Environmental Consultants Client Project ID: Exxon 7-3330, Stockton <br /> =3164 Gold Camp Drive, #200 Matrix: Liquid <br /> `Rancho Cordova, CA 95674 <br /> K a Work Order #: 9509628 -01 Reported: Sep 18, 1995:: <br /> ,.'Atte <br /> noon: Boni Almeld <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> QC Batch#: GC091495BTE 0ZA GC091495BTDCO2A GC091495BTE)(02A GC091495BTE)(02A <br /> Analy. Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Preo. Method: EPA 5030 EPA 50.30 EPA 5030 EPA 5030 <br /> Analyst: J.Minkel J. Minkel J. Minkel J.Minkel <br /> MS/MSD #: 9-0919402 950919402 950919402 950919402 <br /> Sample Conc.. N.Q. N.D. N.D. N.D. <br /> Prepared Date: 9/13/95 9/13/95 9/13/95 9/13/95 <br /> Analyzed Date: 9/13/95 9/13/95 9/13/95 9/13/95 <br /> Instrument I.D.#: GCHP2 GCHP2 GCHP2 GCHP2 <br /> Canc. Spiked: 10 ug/L 10,ug/L 10lig/L 30 u9/L <br /> Result: 10 10 10 30 <br /> MS % Recovery: 100 100 100 t00 <br /> aDup. Result: 10 10 11 32 <br /> MSD % Recov.: 100 100 110 107 <br /> RPD: 0.0 0.0 9.5 6.5 <br /> RPD Limit: 0-50 0-50 0-50 0-50 <br /> ..:......:::... <br /> LCS #: <br /> Prepared Date: <br /> Analyzed Date: <br /> Instrument I.D.#: <br /> Conc. Spiked: <br /> LCS Result: <br /> LCS % Recov.: <br /> LCS 71-133 72-128 72-130 71-120 <br /> Control Limits <br /> Please Note: <br /> The LCS is a control sample of known,interferent4me matrix that is analyzed using the same reagents, <br /> SEQUOIA ANALYTICAL preparation,and analytical methods employed for the samples. The matrix spike is an aliquot of sample <br /> fortified with known quantities of specific compounds and subjected to the entire analytical procedure. It <br /> the recovery of analytes from the matrix spike does not tali within specified control limits due to matrix <br /> interference,the LCS recovery is to be used to validate the batch. <br /> Mike Gregory <br /> Project Manager **MS-Matrix Spike,MSD=Ms Duplicate,RP[)=Relative Difference g50g628 DLT t1> <br />