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/ \ Sequoia 680 Chesapeake Unve Redwood City, CA 94063 (415) 364-9600 FAX (415) 364.9233 <br /> 404 N, Wigee Lan, Wainu[Creek, C.S. 94598 (5 10) 988-9600 , FAX (510)988-9673 <br /> rialytiea 319 Striker Avenue,Suite 8 Sacramento, CA 95834 (916) 921.9600 FAX (916)921-0100 <br /> , nvr.:....:rv..:.n:.:,.:....v.: <br /> elta Environmentai Consuitants Client Project 1D: <br /> v.::.:.....::.............. �.:: ....:.Y.ri <br /> D6So on 7-3330, Stockton <br /> ; <br /> `;3330 Data Drive Matrix: Liquid <br /> :: Rancho Cordova, CA 95670 <br /> Work Order#: 9507J38 -0i Reported` _ Aug r 9, 1995:':; <br /> >Attention: Keoni Almeida Wo A. <br /> -QUALITY CONTROL DATA REPORT <br /> Anaiyte: Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> OC Batch#: GCOW2958TEX17A GCO80295STEX17A GC080295BTED(17A GC080295BTIX17A <br /> Analy. Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep. Method: EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst: J. Minkel J. Minitel J.Minkel J. Minkel <br /> MS/MSD #: 950715205 950716205 950716205 950716205 <br /> Sample Conc.: N.O. N.D. N.D. N.D. <br /> Prepared Date: 8/2/95 3/2/95 8/2/95 8/2/95 <br /> Analyzed Date: 8/2/95 8/2/95 8/2/95 8/2/95 <br /> Instrument I.D.#: GCHP17 GCHP17 GCHP17 GCHP17 <br /> Conc. Spiked: 10 pg/L 10 pg/L 10 pB/L 30 pg/L <br /> Result: 9.6 9.7 9.7 29 <br /> MS Recovery: 96 97 97 97 <br /> Dup. Result: 9.8 9.9 9.9 30 <br /> MSD % Recov.: 98 99 99 100 <br /> RPD: 2.1 2.0 2.0 3.4 <br /> RPO Limit: 0-50 0-50 0-50 0-50 <br /> :r.::....:...... n.. <br /> :.:::.y}:.�::......:..:::.::�:::::................�........ ........... .v.:....v...S..n:.......r.. n <br /> :.Y4.t�•isisvr..v.:...:xex.:.f.:j:..:...:..n.a..n:rv.,.......:.........................:.............:...r..n:-.:.:..:n.:..............n.v.:..........F...r.x........,:..:..x. <br /> LCS 7r <br /> Prepared Date: <br /> Analyzed Date: <br /> Instrument I.D.#: <br /> Conc. Spiked: <br /> LCS Result: <br /> LCS % Recov.: <br /> LCS 71-133 72-128 72-130 71-120 <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 ANALYTICAL preparation,and anaiytical 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 /> R kf the recovery of analytes from the matrix spike does not fall within specifi <br /> ,yed control limits due to matrix <br /> C �U'� �'���� 1 interference.the LCS recovery is to be used to validate the batch. <br /> Mike Gregory <br /> Project Manager "MS=Matrix Spike, MSO MS Duplicate, RPD=Relative%Difference 9507.:38-DLT <1' <br />