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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 /> %70 Analytical 119 Striker Avenue,Suite 8 Sacramento,CA °5834 (916) 921.9600 FAX(916)921-0100 <br /> Geosclence rojec <br /> 30-A Lindbergh Ave. Matrix: Solid <br /> Livermore, CA 94550 <br /> Attention: Tom Seeliger QC Sample Group: 7021292-301 Reported: Mar 3, 1997-1.*- <br /> &W <br /> QUALITY CONTROL DATA REPORT <br /> LN Analyte: Benzene Toluene Ethyl Xylenes Diesel <br /> Benzene <br /> OC Batch#: SP022597 SP022597 SP022597 SP022597 SP022697 <br /> 8020EXA 8020EXA 8020EXA 8020EXA 8015EXA <br /> Analy. Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA 8015 <br /> Prep. Method: EPA 5030 EPA 5030 EPA 5030 EPA 5030 EPA 3550 <br /> Analyst: K.Nill K.Nill K.Nill K.Nill D.Sharma <br /> add MS/MSD#: 7021073 7021073 7021073 7021073 7021297 <br /> Sample Conc.: N.D. 0.0053 mg/kg 0.017 mg/kg 0.024 mg/kg N.D. <br /> Prepared Date: 2/25/97 2/25/97 2/25/97 2/25/97 2/26/97 <br /> &do Analyzed Date: 2/25/97 2/25/97 2/25/97 2/25/97 2/26/97 <br /> Instrument I.D.#: HP-5 HP-5 HP-5 HP-5 HP-3A <br /> Conc. Spiked: 0.40 mg/kg 0.40 mg/kg 0.40 mg/kg 1.2 mg/kg 10 mg/kg <br /> Result: 0.52 0.50 0.54 1.5 7.3 <br /> MS % Recovery: 130 124 131 123 73 <br /> Dup. Result: 0.52 0.49 0.54 1.5 6.2 <br /> MSD%Recov.: 130 121 131 123 62 <br /> RPD: 0.0 2.0 0.0 0.0 16 <br /> LO RPD Limit: 0-25 0-25 0-25 0-25 0-50 <br /> -.1. . ....... ........ <br /> .. ...... <br /> .I.. ....... ....... . . ......... <br /> &0 <br /> LCS#: 5LCS022597 5LCSOM97 5LCS022597 5LCS022597 LCS022697 <br /> Prepared Date: 2/25/97 2/25/97 2/25/97 2/25/97 2/26/97 <br /> Analyzed Date: 2/25/97 2/25/97 2/25/97 2/25/97 2/26/97 <br /> Instrument I.D.#: HP-5 HP-5 HP-5 HP-5 HP-3A <br /> Conc.Spiked: 20 yg/L 20 pg/L 20lig/L 60pg/L 10 mg/kg <br /> LCS Result: 22 20 22 61 9.2 <br /> LCS%Recov.: 110 100 110 102 92 <br /> MS/MSD <br /> LCS 60-140 60-140 60-140 60-140 60-140 <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 /> SEQUOIA"ALYTICAL,#1271 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 /> Ji Ba MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference <br /> #PrJect anager 7021292.ALT <5> <br />