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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (415) 364-9600 FAX(415) 364-9233 <br /> 404 N.Viget Lane Walnut Creek,CA 94598 (510) 988-9600 FAX(510)988-%73 <br /> lid Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921-9600 FAX(916)921.01()0 <br /> ....-Ola'Ine Tech 8. ......6 <br /> ervi ei,­16c". ­'Cile�i'P�6jed 10: "Chevron <br /> 1680 Rogers Avenue Matrix: Liquld <br /> ;;San Jose, CA 95112 <br /> �K <br /> -¢Pttention: Fran Thie Work Order#: 9705617-02 <br /> Reported: Jun 5, 1997;; <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: Benzene Toluene Ethyl Xylenes Gas <br /> Benzene <br /> QC Batch#: GC052897BTEX17A GC052897BTEX17A Gr,052897BTED(17A GC052897BTEX17A GC052897BTEX17A <br /> Analy. Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA 8015M <br /> Prep. Method: EPA 5030 EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst: A.Miraftab A.Miraftab A. Miraftab A Miraftab A.Miraftab <br /> MS/MSD #: 9705B1803 9705131803 9705B1803 970581803 9705B1803 <br /> Sample Cont;.: N.D. N.D. N.D. N.D. N.D. <br /> Prepared Date: 5/28/97 6/28/97 5/28/97 5/28/97 5/28/97 <br /> Analyzed Date: 5/28/97 5/28/97 5/28/97 5/28/97 5/28/97 <br /> Instrument I.D.#: GCHP17 GCHP17 GCHP17 GCHP17 GCHP17 <br /> Cone. Spiked: 10pg/L 10pg/L 10jig/L 30 p9/L 60,ug/L <br /> Result: 9.7 9.8 9.7 29 59 <br /> • IVIS % Recovery: 97 98 97 97 98 <br /> Dup. Result: 10 9.8 9.8 29 59 <br /> MSD % Recov., 100 98 98 97 98 <br /> RPD; 3.0 0.0 1.0 0.0 0.0 <br /> RPD Limit: 0-25 0-25 0-25 0-25 0-25 <br /> X-............ . . . ...... <br /> . ............ <br /> . . ......... <br /> .......... ......... ............... <br /> .................. <br /> LCS#: BLK052897 BLK052897 BLK052897 BLK052897 BLK052897 <br /> Prepared Date: 5/28/97 5/28/97 5/28/97 5/28/97 5/28/97 <br /> Analyzed Date: 5/28/97 5/28/97 5/28/97 5/28/97 5/213/97 <br /> Instrument I.D.#: GCHP17 GCHP17 GCHP17 GCHP17 GCHP17 <br /> Cone. Spiked: 10lig/L 10 pg/L 10pg/L 30,ug/L 60pg/L <br /> LCS Result: 10 10 10 31 61 <br /> LCS %Recov.- 100 100 100 103 102 <br /> MS/MS0 60-140 60-140 60-140 60-140 60-140 <br /> LCS 70-130 70-130 70-130 70-130 70-130 <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 /> S A LNALYTICAL 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. H <br /> the recovery of analytes from the matrix spike does not fall within specified control limits due to Matrix <br /> interference,the LCS recovery is to be used to validate the batch. <br /> e . P <br /> M ager <br /> 7ject Manager MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference 9705B17.BLA <2> <br />