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Sequoia 680 Chesapeake Drive Redwood City 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 /> Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)92t 0100 <br /> Blaine Tech Services, Inc ' Client Project ID Chevron 9-2033/96022782- <br /> 985 Timothy Drive Matrix Liquid <br /> San Jose, CA 95133 <br /> Attention Jim Keller Work Order# 9602J14 -01 Reported Mar 14, 1996 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> QC Batch#• GCO30196BTEX20A GC030196BTEX20A GC030196BTEX20A GCO301966TEX20A <br /> Anally 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 #' G9602E58-06B G9602ESB-06B G9602E58-06B G9602E58-06B <br /> Sample Conc • N D N D N D N D <br /> Prepared Date 3/1/96 3/1/96 3/1/96 3/1/96 <br /> Analyzed Date 3/1/96 3/1/96 3/1/96 3/1/96 <br /> Instrument I D #. GCHP20 GCHP20 GCHP20 GCHP20 <br /> Conc Spiked: 10 ug/L 10 ug/L 10 ug/L 30 ug/L <br /> Result 88 91 87 26 <br /> MS % Recovery 88 91 87 87 <br /> Dup Result 97 98 96 29 <br /> MSD % Recov 97 98 96 97 <br /> RPD 97 74 98 11 <br /> RPD Limit 0-50 0-50 0-50 0-50 <br /> LCS# GBLK030196A GBLK030196A GBLK030196A GBLK030196A <br /> Prepared Date. 3/1/96 3/1/96 3/1/96 3/1/96 <br /> Analyzed Date: 3/1/96 3/1/96 3/1/96 3/1/96 <br /> Instrument I D # GCHP20 GCHP20 GCHP20 GCHP20 <br /> Conc Spiked 10 ug/L 10 ug/L 10 ug/L 30 ug/L <br /> LCS Result. 98 10 10 29 <br /> LCS % Recov: 98 100 100 97 <br /> LCS 70-130 70-130 70-130 70-130 <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 />.SEQUOI ALYTICAL 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 /> P g y P er <br /> Interference,the LCS recovery is to be used to validate the batch <br /> P ect Manager **MS=Matrix Spike, MSD=MS Duplicate,RPD=Relative%Difference <br />