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Sequoia <br />680 peake Drive <br />404 et Lane <br />Redwood City, CA 94063 <br />4598 <br />Walnut Creek, CA 945989 <br />(650) 364-9600 <br />(510) 988-9600 <br />FAX(650)364-9233 <br />FAX (510) 988-9673 <br />Analytical <br />819 St er Avenue, Suite 8 <br />1455 McDowell Blvd. North, Ste. D <br />Sacramento, CA 95834 <br />Petaluma. CA 94954 <br />(916) 921-9600 <br />(707) 792-1865 <br />FAX (916) 921-0100 <br />FAX (707) 792-0342 <br />6747 Sierra Court, Ste J Matrix: Liquid <br />Dublin, CA 94568 <br />Attention: Dave Vossler Work Order #: 9805G06 01 Reported: Jun 16, 1 <br />Analyte: <br />Benzene <br />Toluene <br />Ethyl <br />Xylenes <br />LCS/LCSD #: <br />O6Y8008-BS1 <br />06Y8008-BS1 <br />Benzene <br />06Y8008-BS1 <br />QC Batch#: <br />06Y8008 <br />06Y8008 <br />06Y8008 <br />06Y8008 <br />Analy. Method: <br />EPA 8015M/8020M <br />EPA 8015M/8020M <br />EPA 8015M/8020M <br />EPA 8015M/8020M <br />Prep. Method: <br />EPA 5030 <br />EPA 5030 <br />EPA 5030 <br />EPA 5030 <br />Analyst: <br />N.A. <br />N.A. <br />N.A. <br />N.A. <br />LCS/LCSD #: <br />O6Y8008-BS1 <br />06Y8008-BS1 <br />06Y8008-BS1 <br />06Y8008-BS1 <br />Sample Conc.: <br />N.D. <br />N.D. <br />N.D. <br />N.D. <br />Prepared Date: <br />5/31/98 <br />5/31/98 <br />5/31/98 <br />5/31/98 <br />Analyzed Date: <br />5/31/98 <br />5/31/98 <br />5/31/98 <br />5/31/98 <br />Instrument I.D.#: <br />N.A. <br />N.A. <br />N.A. <br />N.A. <br />Conc. Spiked: <br />20µg/L <br />20 yg/L <br />20 pg/L <br />20 µg/L <br />Result: <br />22 <br />22 <br />19 <br />23 <br />LCS % Recov.: <br />220 <br />110 <br />95 <br />120 <br />Dup. Result: <br />23 <br />22 20 <br />22 <br />LCSD % Recov: <br />120 <br />110 100 <br />110 <br />RPD: <br />8.7 <br />0.0 5.1 <br />8.7 <br />RPD Limit: <br />0-30 <br />0-30 0-30 <br />0-30 <br />LCS <br />Control Limits 80-120 80-120 80-120 80-120 <br />SEQUOIA ANALYTICAL <br />ELAP #1849 <br />Tod Granicher <br />Project 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 />tterference, the LCS recovery is to be used to validate the batch. <br />** MS=Matrix Spike, MSD =MS Duplicate, RPD=Relative % Difference 9805G06.GET <2> <br />