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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> (Z) 404 N Wigct 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 9-1918/960123-J2 <br /> 985 Timothy Drive Matrix Liquid <br /> San Jose, CA 95133 <br /> Attention Jim Keller Work Order# 9601F18-01-08 Reported Feb 6, 1996 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> QC Batch# GC012596BTEX03A GCO12596BTEX03A GCO12596BTEX03A GC012596STEX03A <br /> Analy Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep Method EPA5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst J Woo J Woo J Woo J Woo <br /> MS/MSD# 960176303 960176303 960176303 960176303 <br /> Sample Conc N D N D N D N D <br /> Prepared Date 1/25/96 1/25/96 1/25/96 1/25/96 <br /> Analyzed Date 1/25/96 1/25/96 1/25/96 1/25/96 <br /> Instrument I D # GCHP3 GCHP3 GCHP3 GCHP3 <br /> Conc Spiked 10 frg/L lopg/L 10yg/L 30 ug/L <br /> Result 10 10 10 30 <br /> �MS % Recovery 100 100 100 too <br /> Dup Result 11 11 11 32 <br /> MSD % Recov 110 110 110 107 <br /> RPD 95 95 95 65 <br /> RPD Limit 0-50 0-50 0-50 0-50 <br /> LCS# BLK012596 BLK012596 BLK012596 BLK012596 <br /> Prepared Date 1/25/96 1/25/96 1/25/96 1/25/96 <br /> Analyzed Date 1/25/96 1/25/96 1/25/96 1/25/96 <br /> Instrument I D # GCHP3 GCHP3 GCHP3 GCHP3 <br /> Conc Spiked 10ug/L lopg/L 10pg/L 30pg/L <br /> LCS Result 99 98 97 29 <br /> LCS%Recov 99 98 97 97 <br /> MS/MSD <br /> LCS <br /> Control Limits 70-130 70-130 70-130 70-130 <br /> Please Note <br /> The LCS 1s a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> &Ir AN 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 /> e y <br /> ject Manager '*MS=Matrix Spike, MSD=MS Duplicate,RPD=Relative%Difference 9601 F1 8 BLA <4> <br />