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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364-9600 FAX(650)364-9233 <br /> if a� 404 N Wiget Lane Walnut Creek.CA 94598 (915)988-9600 FAX(9Z5)988-9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> Analytical 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 9-2033/ 981109-T2 <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Christine Lillie Work Order# 9811696-01 Reported Dec 1, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Lead <br /> QC Batch# ME111798700OMDA <br /> Analy Method EPA 239 2 <br /> Prep Method EPA 3020 <br /> Analyst J Jencks <br /> MS/MSD # 981169601 <br /> Sample Conc N D <br /> Prepared Date 11/17/98 <br /> Analyzed Date 11/18/98 <br /> Instrument I D # MTJA6 <br /> Conc Spiked 0 050 mg/L <br /> Result 0 075 <br /> MS % Recovery 150 <br /> Dup Result 0 077 <br /> MSD % Recov 154 <br /> RPD 26 <br /> RPD Limit 0-20 <br /> LCS # LCS111798 <br /> Prepared Date 11/17/98 <br /> Analyzed Date 11/18/98 <br /> Instrument I D # MTJA6 <br /> Conc Spiked 0 050 mg/L <br /> LCS Result 0 059 <br /> LCS % Recov 118 <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 /> 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 /> %o0jiectMa!nager **MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative% Difference 9811696 BLA a5> <br />