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Sequoia 680 Chesapeake Drive Redwood Cary,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 /> frlll� Analytical 819 Sinker Avenue,Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> oN" <br /> ,Blaine Tech Services, Inc Client Project ID Chevron 948632/960820-J2 <br /> 985 Timothy Drive Matrix Liquid <br /> s San Jose, CA 95133 <br /> Attention Jim Keller Work Order# 9608067-01-04 Reported Sep 6, 1996 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> GC Batch#. GC082996BTEX02A GC0829%BTEX02A GCO82MBTEX02A GC0829%BTEX02A <br /> Analy. Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prop Method, EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst: D Jirsa D Jirsa D Jima D Jirsa <br /> MS/MSD#: 96mc6206 960806206 960806206 960SC62W <br /> Sample Conc • N D N D N D N D <br /> Prepared Date 8/29/96 8/29/96 8/29/96 8/29/96 <br /> Analyzed Date 8/29/96 8/29/96 8/29/96 8/29/96 <br /> Instrument I D # GCHP2 GCHP2 GCHP2 GCHP2 <br /> Conc Spiked 10pg/L 10pg/L 10pg/L 30pg/L <br /> Result 93 89 88 27 <br /> MS %Recovery 93 89 88 90 <br /> Dup Result 93 90 91 27 <br /> MSD %Recov 93 90 91 90 <br /> RPD 00 11 34 00 <br /> RPD Limit. 0.25 0.25 0-25 0-25 <br /> LCS #' BLK082996 BLK082M BLK0829% BLK082M <br /> Prepared Date. 8/29/96 8/29/96 8/29/96 8/29/96 <br /> Analyzed Date 8/29/96 8/29/96 8/29/96 8/29/96 <br /> Instrument I D #: GCHP2 GCHP2 GCHP2 GCHP2 <br /> Conc. Spiked 10 pg/L 10 pg/L 10 pg/L 30 pg/L <br /> LCS Result: 91 87 86 26 <br /> LCS %Recov : 91 87 86 87 <br /> 60-140 60.140 60.140 60.140 <br /> LCS 70.130 70-130 70-130 70-130 <br /> Control Limits <br /> Piease Note <br /> The LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> NALYTICAL pre anon,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 /> 7Interference,the LCS recovery is to be used to validate the batch <br /> egg Pe <br /> ct Manager **MS=Matrix Spike, MSD=MS Duplicate, RPD=Relative%Difference 9608067 SLA <6> <br />