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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 /> Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921-9600 FAX(916)921-()J0o <br /> Mon Geoick o 1464-343 <br /> 111 Project <br /> g 30-A Lindbergh Ave. Matrix: Liquid <br /> Livermore, CA 94550 <br /> Attention: Allsa Le May OC Sample Group: 6110372-382 Reported: Nov 19, 11996--�r',,' <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> QC Batch#: GC1 11696 GC1 11696 GC111698 GC111696 <br /> 802004A 802004A 802004A 802004A <br /> Analy. Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep. Method: EPA 5030 EPA5030 EPA 5030 EPA 5030 <br /> Analyst: C.Westwater C.Westwater C.Westwater C.Westwater <br /> MS/MSD#-. 6110350 6110350 6110350 6110350 <br /> Sample Conc.- 0.53 pg/L N.D. N.D. N.D. <br /> Prepared Date- 11/15/96 11/15/96 11/15/96 11/15/96 <br /> Analyzed Date: 11/15/96 11/15/96 11/15/96 11/15/96 <br /> Instrument I.D.#: HP-4 HP-4 HP-4 HP-4 <br /> Conc. Spiked: 20.ug/L 20.ug/L 20,ug/L 60,ug/L <br /> Result: 18 16 17 52 <br /> IVIS % Recovery: 87 80 85 87 <br /> Dup. Result: 20 18 18 56 <br /> MSD %Recov.: 97 90 90 93 <br /> RPD: 11 12 5.7 7.4 <br /> RPD Limit: 0-25 0-25 0-25 0-25 <br /> ME1, ............ .... <br /> LCS#: 4LCS111696 4LCS111696 4LCS111696 4LCS111696 <br /> Prepared Date: 11/16/96 11/16/96 11/16/96 11/16/96 <br /> Analyzed Date; 11/16/96 11/16/96 11/16/96 11/16/96 <br /> Instrument I.D.#: HP-4 HP-4 HP-4 HP-4 <br /> Conc. Spiked: 20lig/L 20lig/L 20lig/L 60,ug/L <br /> LCS Result: 23 is 17 51 <br /> LCS' Recov.: 115 so 85 85 <br /> MS/M313 <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 /> SEQUOIA APLYTICAL, #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 /> I interference,the LCS recoveEy Is to be used to validate the batch. <br /> Bav IVIS-Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference <br /> 6J1roject Manager <br /> 6110372.ALT <6> <br />