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Sequoia 660 Chesapeake Drive Redwood City, CA 94063 (650) 364-9600 FAX (650)364.9233 <br /> 404 N Wigct Lane Walnut Creek,CA 94598 (510) 988-9600 FAX (510) 988.9673 <br /> 5) Analytical 819 Striker Avenue,Suitc 8 Sacramento, CA 95834 (916) 921-9600 FAX(916)921-0100 <br /> . <br /> Blaine Tech Services, Inca Client Project ID: Chevron 9-0557 %971124-S2 <br /> 1680 Rogers Ave. Matrix: Liquid <br /> San Jose, CA 95112 <br /> Attention: Fran Tnie Work Order#: 9711 G09-09-10 Reported: Dec 22, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: Benzene Toluene Ethyl Xylenes Gas <br /> Benzene <br /> OC Batch#: GC121697BTEX18A GC121697BTEX18A GC121697BTEX18A GC121697BTEX18A GC121697BTEX18A <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: R.G. R. G. R, G. R. G. R.G. <br /> MS/MSD #: 971238003 971238003 971238003 971238003 971238003 <br /> Sample Conc.: N.D. N.D. N.D. N.D. N.D. <br /> Prepared Date: 12/16/97 12/16/97 12/16/97 12/16/97 12/16/97 <br /> Analyzed Date: 12/15/97 12/16/97 12/16/97 12/16/97 12/16/97 <br /> Instrument I.D.#: GCHP18 GCHP18 GCHP18 GCHP18 GCHP18 <br /> Conc. Spiked: 10ug/L 10ug/L 1Dug/L 30ug/L 60ug/L <br /> Result: 8.3 8.4 8.2 26 63 <br /> MS % Recovery: 83 84 82 87 105 <br /> Dup. Result: 8.5 8.6 8.5 26 65 <br /> MSD % Recov.: 86 86 85 87 108 <br /> RPD: 3.6 2.4 3.6 0.0 3.1 <br /> RPD Limit: 0-25 0-25 0-25 0-25 0-25 <br /> LCS #: BLK121697 BLK121697 BLK121697 BLK121697 BLK121697 <br /> Prepared Date: 12/16/97 12/16/97 12/16/97 12/16/97 12/16/97 <br /> Analyzed Date: 12/16/97 12/16/97 12/16/97 12/16/97 12/16/97 <br /> Instrument I.D.#: GCHP18 GCHP18 GCHP18 GCHP18 GCHP18 <br /> Conc. Spiked: 10ug/L 10ug/L 10ug/L 30ug/L 60ug/L <br /> LCS Result: 8.5 8.6 8.4 26 65 <br /> LCS % Recov.: 85 Be 84 87 108 <br /> 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 />. <br /> 4SE�jjOl ALYTICAL 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. If <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 /> nner <br /> anager *=MS=Matrix Spike, MSD=MS Duplicate,RPD=Relative%Difference 9711G09.BLA <5> <br />