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4 680 Chesapeake Drive Redwood City CA 94063 (650)364-%00 FAX(650)364-9233 <br /> Sequoia 404 N Wiget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> �rill�► Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> 1455 McDowell Blvd North Ste D Petaluma.CA 94954 (707)792 1865 FAX(707)792-0342 <br /> Blaine Tech Services, Inc Client Project ID Chevron 9-8264/ 981124-J2 <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Christine Lillie Work Order# 9811 H50-01 Reported Dec 22, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Lead <br /> QC Batch# ME12029870001VIDA <br /> Analy Method EPA 239 2 <br /> Prep Method EPA 3020 <br /> Analyst J Jencks <br /> MS/MSD # 9811 H5001 <br /> Sample Conc N D <br /> Prepared Date 12/2/98 <br /> Analyzed Date 12/4/98 <br /> Instrument I D # MTJA3 <br /> Conc Spiked 0 050 mg/L <br /> Result 0 038 <br /> MS % Recovery 72 <br /> Dup Result 0 039 <br /> MSD % Recov 74 <br /> RPD 26 <br /> RPD Limit 0-20 <br /> LCS # LCS120298 <br /> Prepared Date 12/2/98 <br /> Analyzed Date 12/4/98 <br /> Instrument I D # MTJA3 <br /> Conc Spiked 0 050 mg/L <br /> LCS Result 0 051 <br /> LCS % Recov 102 <br /> 75-125 <br /> LCS 80-120 <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 ANALYTICAL preparation,and analytical methods employed for the samples The matrix spike is an aliquot of sample <br /> etomfied 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 /> Project Manager **MS=Matrix Spike, MSD=MS Duplicate,RPD=Relative% Difference 9811H50 BLA <8a <br />