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rSequoia 680 Chesapeake Dnve Redwood City CA 94063 (415) 364 9600 FAX - <br /> (415) 364 9233 - <br /> 404 N Wiget Lane Walnut Creek,CA 94598 (510) 988 9600 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 9-5075/951031-M1 <br /> 985 Timothy Drive Matrix Liquid <br /> San Jose, CA 95133 <br /> Attention Jim Keller Work Order# 9511057-06 Reported Nov 13, 1995 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xytenes <br /> Benzene <br /> QC Batch# GC110295BTEX02A GC1102958TEX02A GC110295BTEX02A GC110295BTEX02A <br /> Analy Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep Method EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst J Woo J Woo J woo J Woo <br /> MS/MSD# 95llG111i 9511131111 9511131111 951IG1111 <br /> Sample Conc N D N D N D N D <br /> Prepared Date 11/2/95 11/2/95 11/2/95 11/2/95 <br /> Analyzed Date: 11/2/95 11/2/95 11/2/95 11/2/95 <br /> Instrument I D #' GCHP2 GCHP2 GCHP2 GCHP2 <br /> Conc Spiked 1opg/L 10 fig/L 10 fig/L 30 fig/L <br /> Result 11 10 10 31 <br /> • MS % Recovery 110 100 100 103 <br /> ❑Up Result 10 10 10 31 <br /> MSD % Recov 100 100 100 103 <br /> RPD: 95 00 00 00 <br /> RPD Limit: 0-50 0-50 0-50 0-50 <br /> LCS#. BLK102795 BLK102795 BLK102795 BLK102795 <br /> Prepared Date 11/2/95 11/2/95 11/2/95 11/2/95 <br /> Analyzed Date 11/2/95 11/2/95 11/2/95 11/2/95 <br /> Instrument I D # GCHP2 GCHP2 GCHP2 GCHP2 <br /> Conc Spiked. 10 fig/L 10 fig/L 10 fig/L 30 fig/L <br /> LCS Result 10 10 10 30 <br /> LCS % Recov 100 100 100 100 <br /> MS/MSD <br /> LCS 71-133 72-128 72-130 71-120 <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 /> 7nner 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 Dupticate, RIP D=Relative%Difference 9511057 BLA <3> <br />