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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (4 15) 364-9600 FAX(415) 364.9233 <br /> 1900 Bates Avenue Suite L Concord CA 94520 510 686.9600 F <br /> ( ) AX(516)686.9489 <br /> -,-Analytical 819 StrikerAvtnue;Suite B Sacramento,CA 95834 (916) 921•9600 FAX(916)921•0100 <br /> U <br /> ..:....::.:::::::x::.. ...-..r.:. •.u. s.:. .... .. <br /> .:RESNA plant Project ID: F7132.93, Quik Stop 132 <br /> a>3315 Almaden Expwy., Suite 34 Matrb(: Water <br /> ;San Jose, CA 95118 <br /> :Attention: Rich Garlow..........................:.00 Sample Group: 4CI4701: ::::::.:::::.:::..:.,::::::. :: Reported: Apr...13., 1 <br /> QUALITY CONTROL DATA REPORT <br /> 1 ANALYTE Benzene Toluene Ethyl Xylenes <br /> i•j Benzene <br /> Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Analyst: P.Madden P.Madden P. Madden P. Madden <br /> MS/MSD <br /> 13atch#: 4040088MS 4040088MS 4040088MS 404008SMS <br /> Date Prepared: 4/8/94 - 4/8/94 4/8/94 4/8/94 <br /> ] Date Analyzed: 4/8/94 4/8/94 4/8/94 4/8/94 <br /> Instrument I.D.#: GCHP-2 GCHP-2 GCHP-2 GCHP-2 <br /> Conc. Spiked: 10,ug/L 10pg/L 10pg/L 20ug/L <br /> Matrix Spike <br /> % Recovery: 100 106 98 110 <br /> _Matrix Spike <br /> Duplicate% <br /> Recovery: 95 105 94 101 <br /> Relative% <br /> Difference: 5.1 0.95 4.2 8.5 <br /> LCS Batch#: MB040894 MB040894 MB040894 M304Gd94 <br /> Date Prepared: 4/8/94 4/8/94 4/8/94 4/8/94 <br /> Date Analyzed: 4/8/94 4/8/9.1 4/8/94 4/a/94 <br /> Instrument 1.D.#: GCHP-2 GCHP•2 GCHP--2 GCHP-2 <br /> LCS % <br /> Recovery: 90 90 91 98 <br /> Recovery <br /> Control Limits: 71-133 72-128 72.130 71.120 <br /> ------- <br /> Re-ase-Note: . <br /> EOUOIA ANALYTICAL The LCS is a control sample of known,interferent free matrix that is analyzed using the same reagents, <br /> U��LAP#1894 - 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.4f <br /> t lLfr <br /> the recoveryof.analytes from the matrix spike does not fall within specified control limits due to matrix <br /> imes'fere_nce,the LCS recovery isto be used to validate the batch. <br /> Vickie eCa <br /> i Project Manager 4047011.1RES <2> <br />