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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (415) 364-9600 FAX (415) 364.9233 <br /> t900 Bates Avenue,Suite L Concord, CA 94520 (510) 686.9600 FAX(510) 686-91589 <br /> VQ0F Analytical 819 Striker Avenue,Suite 9 Sacramento, CA 95834 (916) 921-9600 FAX(916)921-0100 <br /> 7 <br /> Delta Envirorfrnentai Consultants Client Project I[)- Exxon 7-3330 0093-810 <br /> .:3330 Data Drive Matrix: Liquid <br /> X. <br /> :!-...Rancho Cordova, CA 95670 <br /> Reported: Feb 2-2, 1995.., <br /> Attention: Keoni Almeida Work Order 9502685 -01 - 04 <br /> .. ... ...... <br /> . ........ <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: Benzene Toluene, Ethyl Xyienes <br /> Benzene <br /> QC Batch* GCO220956TEX03A GCO220958TE(03A GCO22095BTEYMA GCO22095BTEX03A <br /> Analy. Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep. Method., EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst: J.Minkel J.Minkel J.Minkel J.Minkel <br /> MS/MSD#: G9502583-02C G9502583-02C G9502583-02C G9502583-02C <br /> Sample Conc.: N.D. N.D. N.D. N.D. <br /> Prepared Date: 2/20/95 2/20/95 2/20/95 2/20/95 <br /> Analyzed Date; 2/20/95 2/20/95 2/20/95 2/20/95 <br /> Instrument I.D.#: GCHP3 GCHP3 GCHP3 GCHP3 <br /> Conc. Spiked: 10 ug/L 10ug/L 10 ug/L 30 ug/L <br /> Result: 9.7 9.4 9.3 28 <br /> MS % Recovery- 97 94 93 93 <br /> Dup. Result: 8.9 8.3 8.3 25 <br /> MSD % Recov.: 89 83 83 83 <br /> RPD: 815 12 11 11 <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 /> MS/MSD <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,interferent-free matrix that is analyzed using the same reagents, <br /> SEQUOIA A LYrI L preparation,and analytical methods employed for the samples. The matrix Spike is an aliquot of sample <br /> • SEQUOIA <br /> with known quantities of specific compounds and subjected to the entire analytical procedure. if <br /> the recovery of analytes from the matrix spike does not fall within specified corrtroi limits due to matrix <br /> interference.the LCS recovery is to be used to validate the batch. <br /> Todd 11 <br /> Project Manager MS Matrix Spike,MSD MS Duplicate, RPO Relative%Difference 9502B85,DLT <1> <br />