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/na <br /> L ' Sequoia ':)680 Chesapeake Drive Redwood City,CA 940631!0'415) 364.9600 FAX(415)364-9233 <br /> 1900 Bates Avenue,Suite L Concord,CA 94520 (510) 686-9600 FAX(510)686.9689 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921-9600 FAX(916)921-0100 <br /> < t:»>>>kion'=::>::::............................................................................................. <br /> ::::::::::::.....:::::......:,:::.:::...........:..:.:.......:.:.:........:.:::.....::::. <br /> "`r`' ct co# 3 <br /> >f3rown��Caldwefl�� .Client P ole <br /> < 9616 Micron Ave., Suite 600 Matrix: Soil <br /> Sacramento, CA 95827 Reported: Aug 30, 1994 <br /> :::`Attention: Steve Misner OC Sample Group: 4080277-292 Ammended: Oct 18, 1994 <br /> DUALITY CONTROL DATA REPORT <br /> ANALYTE <br /> Benzene Toluene Ethyl Xylenes <br /> l Method: EPA 802_0 EPA 8020 EPA 802_0 EPA 8020 <br /> - Analyst: N.Zahedi N.Zahedi w~ N.Zahed1 N.Zahedi _ <br /> Concentration <br /> Spiked: 0.20 mg/Kg 0.20 mg/Kg 0.20 mg/Kg 0.20 mg/Kg <br /> LCS Batch#: LCS082694 LCS082694 LCS082694 LCS082694 J� <br /> OCT 2 5 1994 <br /> Date Prepared: 8/26/94 8/26/94 8/26/94 8/26/94 <br /> Date Analyzed: 8/26/94 8/26/94 8/26/94 8/26/94 ENVIRONMENTAL HEALTH <br /> Instrument I.D.#: HP-1 HP-1 HP-1 HP-1 PERMIT/SERVICES <br /> .LCS% <br /> Recovery: 109 105 108 108 <br /> Control Limits: 55-145 47-149 47-155 56-140 <br /> MS/MSD <br /> Batch#: 4080341 4080341 4080341 4080341 <br /> Date Prepared: 8/26/94 8/26/94 8/?,6/94 8/26/94 <br /> Date Analyzed: 8/26/94 8/26/94 8/26/94 8/26/94 <br /> Instrument I.D.#: HP-1 HP-1 HP-1 HP-1 <br /> Matrix Spike - <br /> %Recovery: 95 100 98 97 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery: 87 93 88 88 <br /> Relative% <br /> Difference: 8.0 7.3 11 9.7 <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 /> � � validation of sample batch results. Due to matrix effects,the OC limits for MS/MSD's are advisory only <br /> I Yc ww;t� and are not used to accept or reject batch results. <br /> Jen i Higgins <br /> Project Manager 4080277.BRS <4> <br />