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Sequoia 680 Chesapeake Drive Redwood City, CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 41) 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 /> I <br /> Blaine Tech Services, Inc Client Project ID Shell Stockton / 961025-H1 <br /> 985 Timothy Drive Matrix Liquid <br /> San Jose, CA 95133 <br /> Attention Jim Keller Work Order # 961OH37-08 Reported Nov 14, 1996 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> QC Batch# GC103196BTEX07A GC1031968TEX07A GC103196BTEX07A GC103196BTEX07A <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 # 961OB9105 961OB9105 961069105 961OB9105 <br /> Sample Conc N D N D N D N D <br /> Prepared Date 10/31/96 10/31/96 10/31/96 10/31/96 <br /> Analyzed Date 10/31/96 10/31/96 10/31/96 10/31/96 <br /> Instrument I D # GCHP7 GCHP7 GCHP7 GCHP7 <br /> Conic Spiked 10lig/L 10 pg/L 10 ug/L 30 pg/L <br /> Result 97 97 98 29 <br /> • MS % Recovery 97 97 98 97 <br /> Dup Result 87 88 89 27 <br /> MSD % Recov 87 88 89 90 <br /> RPD 11 97 96 71 <br /> RPD Limit 025 025 0-25 0-25 <br /> LCS # BLK103196 BLK103196 BLK103196 BLK103196 <br /> Prepared Date 10/31/96 10/31/96 10/31/96 10/31/96 <br /> Analyzed Date 10/31/96 10/31/96 10/31/96 10/31/96 <br /> Instrument I D # GCHP7 GCHP7 GCHP7 GCHP7 <br /> Conic Spiked 10ug/L 10 ug/L 10 Ng/L 30 ug/L <br /> LCS Result 97 96 97 29 <br /> LCS % Recov 97 96 97 97 <br /> M M D M140 60140 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, interierent free matrix that is analyzed using the same reagents, <br /> SEQUOI 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 LGS recovery is to be used to validate the batch <br /> Pegg Penner <br /> Prafect Manager *' MS=Matrix Spike, MSD=MS Duplicate, RPD=Relative%Difference 961OH37 BLA <3> <br />