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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 9600 FAX(510)988 9673 <br /> 4D Analytical 819 Striker Avenue Suite B Sacramento,CA 95834 (916) 921 9600 FAX (916)921-0100 <br /> Blaine Tech Seivices, Inc Client Project ID Chevron 9-8264/970521-H3 x <br /> :1680 Rogers Avenue Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thle Work Order# 9705C27-01-02, 05 Reported Jun 9, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes Gas <br /> Benzene <br /> QC Batch# GCO52997BTEX01A GC052997BTD(01A GCO52997BTEX01A GCO52997BTEX01A GC052997BTEX01A <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 Porter A Porter A.Porter A.Porter A.Porter <br /> MS/MSD#• 970582502 970582502 9705B2502 970582502 9705B2502 <br /> Sample Conc N D N D N D N D N D <br /> Prepared Date 5/29/97 5/29/97 5/29/97 5/29/97 5/29/97 <br /> Analyzed Date 5/29/97 5/29/97 5/29/97 5/29/97 5/29/97 <br /> Instrument I D # GCHP1 GCHP1 GCHP1 GCHP1 GCHP1 <br /> Conc Spiked 10pg/L 10ug/L 10ug/L 30ug/L 60ug/L <br /> Result 96 95 96 29 80 <br /> MS % Recovery 96 95 96 97 100 <br /> Dup Result 10 10 10 30 63 <br /> MSD% Recov 100 100 100 100 105 <br /> RPD: 41 51 41 34 49 <br /> RPD Limit 0-25 0-25 0-25 0-25 0-25 <br /> LCS # BLK052997 BLK052997 BLK052997 BLK052997 BLK052997 <br /> Prepared Date: 5/29/97 5/29/97 5/29/97 5/29/97 5/29/97 <br /> Analyzed Date 5/29/97 5/29/97 5/29/97 5/29/97 5/29/97 <br /> Instrument I D #. GCHP1 GCHP1 GCHP1 13CHP1 GCHP1 <br /> Conc Spiked: 10ug/L 10ug/L 10Ng/L 30ug/L 60pg/L <br /> LCS Result 10 98 98 29 62 <br /> LCS % Recov 100 98 98 97 103 <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 />. itanager <br /> LYTICAL 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 /> MS-Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference 9705C27 BLA <3> <br />