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Sequoia <br />%Ili Analytical <br />• <br />680 Chesapeake Drive <br />Redwood City, CA 940 <br />(415) 364-9600 <br />FAX (415) 364-9233 <br />Diesel <br />404 N. Wiget Lane <br />Walnut Creek, CA 94598 <br />(510) 988-9600 <br />FAX (510) 988-9673 <br />960968012 <br />819 Striker Avenue, Suite 8 <br />Sacramento, CA 95834 <br />(916) 921-9600 <br />FAX (916) 921-0100 <br />xxxxxx <br />:........................... ............................................................................. <br />Smith Environmental Client Project ID. 20940, <br />0940, 94-261-94-20 <br />441 N. Whisman, Bldg. 23 Matrix: Solid <br />Mountain View, CA 94043 <br />Attention: Rich Garlow Work Order #: 9609644-01-02 Reported: Se 23, 1996 <br />QUALITY CONTROL DATA REPORT <br />Analyte: <br />Benzene <br />Toluene <br />Ethyl <br />Xylenes <br />Diesel <br />MS/MSD #: <br />960968012 <br />960968012 <br />Benzene <br />960968012 <br />BLK092096 <br />QC Batch#: <br />GCO92196BTEXA <br />GCO92196BTEXA <br />GCO921966TEXA <br />GCO921966TEXA <br />GCO920960HBPEX <br />Analy. Method: <br />EPA 8020 <br />EPA 8020 <br />EPA 8020 <br />EPA 8020 <br />EPA 8015M <br />Prep. Method: <br />EPA 5030 <br />EPA 5030 <br />EPA 5030 <br />EPA 5030 <br />EPA 3550 <br />Analyst: <br />J. Heider <br />J. Heider <br />J. Heider <br />J. Heider <br />B. Sullivan <br />MS/MSD #: <br />960968012 <br />960968012 <br />9609138012 <br />960968012 <br />BLK092096 <br />Sample Conc.: <br />N.D. <br />N.D. <br />N.D. <br />N.D. <br />N.D. <br />Prepared Date: <br />9/21/96 <br />9/21/96 <br />9/21/96 <br />9/21/96 <br />9/20/96 <br />Analyzed Date: <br />9/23/96 <br />9/23/96 <br />9/23/96 <br />9/23/96 <br />9/20/96 <br />Instrument I.D.#: <br />GCHP7 <br />GCHP7 <br />GCHP7 <br />GCHP7 <br />GCHP4 <br />Conc. Spiked: <br />0.20 mg/Kg <br />0.20 mg/Kg <br />0.20 mg/Kg <br />0.60 mg/Kg <br />25 mg/Kg <br />Result: <br />0.19 <br />0.17 <br />0.16 <br />0.50 <br />44 <br />MS % Recovery: <br />95 <br />85 <br />80 <br />83 <br />176 <br />Dup. Result: <br />0.18 <br />0.16 <br />0.15 <br />0.46 <br />45 <br />MSD % Recov.: <br />90 <br />80 <br />75 <br />77 <br />180 <br />RPD: <br />5.4 <br />6.1 <br />6.5 <br />8.3 2.0 <br />RPD Limit: <br />0-25 <br />0-25 <br />0-25 <br />0-25 0-50 <br />LCS #: <br />BLK092196 <br />BLK092196 <br />BLK092196 <br />BLK092196 Not applicable <br />Prepared Date: <br />9/21/96 <br />9/21/96 <br />9/21/96 <br />9/21/96 <br />Analyzed Date: <br />9/23/96 <br />9/23/96 <br />9/23/96 <br />9/23/96 <br />Instrument I.D.#: <br />GCHP7 <br />GCHP7 <br />GCHP7 <br />GCHP7 <br />Conc. Spiked: <br />0.20 mg/Kg <br />0.20 mg/Kg <br />0.20 mg/Kg <br />0.60 mg/Kg <br />LCS Result: <br />0.16 <br />0.19 <br />0.18 <br />0.54 <br />LCS % Recov.: <br />80 <br />95 <br />90 <br />90 <br />MS/MSD 60-140 60-140 60-140 60-140 50-150 <br />LCS 70-130 70-130 70-130 70-130 60-140 <br />Control Limits <br />SEQUOI ALYTIC <br />Vyt Aki <br />Pro ct Manager <br />,lease Note: <br />The LCS is a control sample of known, interferent -free matrix that is analyzed using the same reagents, <br />reparation, and analytical methods employed for the samples. The matrix spike is an aliquot of sample <br />)rtified with known quantities of specific compounds and subjected to the entire analytical procedure. If <br />ie recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br />iterference, the LCS recovery is to be used to validate the batch. <br />** MS=Matrix Spike, MSD=MS Duplicate, RPD=Relative % Difference 9609644.SSS <2> <br />-0 <br />