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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 /> �I,�► Analytical 819 Striker Avenue Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Blaine Tech Services, Inc Client Project ID Shell Stockton / 961025-1-12 <br /> 985 Timothy Drive Matrix Liquid <br /> San.lose, CA 95133 <br /> Attention Jim Keller Work Order # 961OH38 -01, 03 <br /> Reported Nov 8, 1996 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> OC Batch# GC103096BTEX06A GC103096BTEX06A GC1030968TEX06A GC1030968TEX06A <br /> Analy Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep Method EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst H Porter H Porter H Porter H Porter <br /> MS/MSD # 9610$1605 961OB1606 961081606 961081606 <br /> Sample Conc N D N D N D N D <br /> Prepared Date 10/30/96 10/30/96 10/30/96 10/30/96 <br /> Analyzed Date 10/30/96 10/30/96 10/30/96 10/30/96 <br /> instrument I D # GCHP6 GCHP6 GCHP6 GCHP6 <br /> Conc Spiked 10 pg/L 10 ug/L 1OW911- 30 pg/L <br /> Result 10 10 10 31 <br /> MS % Recovery 100 100 100 103 <br /> ❑up Result 11 11 10 32 <br /> MSD % Recov 110 110 100 107 <br /> RPD 95 95 00 32 <br /> RPD Limit 0-25 0-25 0-25 0-25 <br /> LCS #- BLK103096 BLK103096 BLK103096 BLK103096 <br /> Prepared Date. 10/30/96 10/30/96 10/30/96 10/30/96 <br /> Analyzed Date 10/30/96 10/30/96 10/30/96 10/30/95 <br /> Instrument I D # GCHP6 GCHP6 GCHP6 GCHP6 <br /> Conc Spiked. long/L 10u9/L lops/L 30pg/L <br /> LCS Result 92 90 90 28 <br /> LCS % Recov : 92 90 90 93 <br /> MS/MSD 60-140 60-140 60-140 60-140 <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 /> QUO[ 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 /> P ggy Penner <br /> Project Manager **MS=Matrix Spike, MSD=MS Duplicate RPD=Relative% Difference 961OH38 BLA <1> <br />