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I} <br /> I <br /> Sequoia <br /> 680 Chesapeake Drive Redwood City;CA 4406(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 a Sacramento,CA 95834 (916) 921.9600 FAX(916)921.0100 <br /> Upg"radient Cllent Projec..ID Srii= roper#y <br /> 1017 26th St. Matrix: Sail <br /> Sacramento, CA 95816 <br /> Attention: Vic Cherven QC Sample Group: 607-0476 Reported: Jul 24, 1996: <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE <br /> Heptachlor Aldrin Dieldrin <br /> Method: EPA 8080 EPA 8080 EPA 8080 <br /> Analyst: LH LH LH <br /> Concentration <br /> Spiked: 20 ug/kg 20 ug/kg 20;ug/kg <br /> LCS Batch#: LCS071796 LCS071796 LCS071796 <br /> ;I <br /> Date Prepared: 07/17/96 07/17/96 07/17/96 <br /> Date Analyzed: 07/23/96 07/23/96 07/23/96 <br /> Instrument I.D.#: - - - <br /> LCS % <br /> Recovery: 72 100 93 <br /> Control Limits: 60-130 60-130 60-130 <br /> MS/MSD <br /> Batch#: 6070783 6070783 6070783 <br /> Date Prepared: 07/17/96 07/17/96 07/17/96 <br /> Date Analyzed: 07/23/96 07/23/96 07/23/96 <br /> Instrument I.D.#: - - <br /> Matrix Spike <br /> % Recovery: 75 96 93 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery: 71 89 89 <br /> Relative% <br /> Difference: 5.5 7.6 4.4 <br /> Please Note: <br /> The LCS is a control sample of known,interferent free matrix that is analyzed using the same reagents, <br /> SEQUOIA ANALYTICAL preparation and analytical methods employed for the samples. The LCS%recovery data is used for <br /> 1� 1' validation of sample batch results. Due to matrix effects,the QC limits for MS/MSD's are advisory only <br /> and are not used to acce t or.reject batch results. <br /> Margie amba <br /> Project Manager/Sacramento laboratory <br /> 6070476-UPS <2> <br />