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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (415) 364-9600 FAX(415) 364-9233 <br /> 404 N. Wiget Lane Walnut Creek,CA 94598 (510) 988-96W FAX(510)988-9673 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921.9600 FAX(916)921-0100 <br /> :Blaine Tech Services, Inc. Client Project ID: Chevron 9-0557/960924-Z2 <br /> X985 Timothy Drive Matrix: Liquid <br /> {'San Jose, CA 95133 <br /> Att ntion: Jim Keller Work Order#: 9609E58 -01-02 Reported: Oct 9, 1996 <br /> e <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> QC Batch#: GCO92796BTEX01A GC092796BTEXOIA GCM2796BTEX01A GCO92796BTEXOIA <br /> Analy. Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep. Method: EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst: Y.Arteaga Y.Arteaga Y.Arteaga Y.Arteaga <br /> MS/MSD #: 9609C1104 9609C1104 960901104 9609C1104 <br /> Sample Cone.: N.D. N.D. N.D. N.D. <br /> Prepared Date: 9/27/96 9/27/96 9/27196 9/27/96 <br /> Analyzed Date: 9/27/96 9/27/96 9/27/96 9/27/96 <br /> Instrument I.D.#: GCHPi GCHP1 GCHP1 GCHP1 <br /> Cone. Spiked: 10ug/L 10Ng/L 10pg/L 30pg/L <br /> Result: 8.6 7.3 7.1 21 <br /> •MS % Recovery: 86 73 71 70 <br /> Dup. Result: 8.7 7.8 7.9 23 <br /> MSD % Recov.: 87 78 79 77 <br /> RPD: 1.2 6.6 11 9.1 <br /> RPD Limit: 0-25 0-25 0-25 0-25 <br /> LCS #: BLK092796 BLK092796 BLK092796 BLK092796 <br /> Prepared Date: 9/27/96 9/27/96 9/27/96 9/27/96 <br /> Analyzed Date: 9/27/96 9/27/96 9/27/96 9/27/96 <br /> Instrument I.D.#: GCHP1 GCHP1 GCHP1 GCHP1 <br /> Cone. Spiked: 10)rg/L 10Ng/L i0 frg/L 30u9/L <br /> LCS Result: 9.4 8.6 8.7 25 <br /> LCS % Recov.: 94 86 87 83 <br /> M /MSD 60-140 60.140 60-140 60-140 <br /> LCS 70-130 70-130 70.130 70-130 <br /> Control Limits <br /> Please Note: <br /> The CS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> .SEQUO NALYTICAL p aration,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 /> gg n <br /> P je t anager •"MS=Matrix Spike,MSD=MS Duplicate,RPL]=Relative%Difference 9609E58.BLA <t> <br />