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® \ Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (415) 364.9600 FAX (415) 364-9133 <br /> �••� 404 N,Wiget Lane Walnut Crtck,CA 94598 (510) 988.9600 FAX{510}988-9673 <br /> Analytical gigs,' <br /> Suite 8 Sacramento,CA 95834 (916) 911-9600 FAX(916)921 0100 <br /> t <br /> :,,;Smith Environmental ....... <br /> Client Project 1D. 94-273-94-10, Quik Stop 132 <br /> ' .�441 N.Whisman, Bldg. 23 Matrix: Liquid <br /> ::;Mountain View, CA 94043 <br /> --Atten <br /> tion• Rich <br /> ariow <br /> .. . Work k: O. .rd.. :r <br /> #. <br /> 95:.:1�2 <br /> G46-0i <br /> -:6: <br /> ................... Reported:.: » :: v.:�:. Jan1896�:„ , �- <br /> QUALITY CONTROL. DATA REPORT <br /> ' Analyte: Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> QC Batch#: GC1226958TEX07A GC122695BTEX07A GC122695BTEX07A GC12269513TEX07A <br /> ' Analy. Method: EPA 8020 EPA 8020 EPA 6020 EPA 8020 <br /> Prep. Method: EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst: A.Miraftab A.Miraftab A.Miraftab A. Miraftab <br /> ' MS/MSD#: 9512ES203 9512E8203 9512128203 9512E8203 <br /> Sample Cone.: N.D, N.D. N.D. KD. <br /> Prepared Date: 12/26/95 12/26/95 12/26/95 12/26/95 <br /> t Analyzed Date: 12/26/95 12/26/95 12/26/95 12/26/95 <br /> Instrument I.D.#: GCHP7 GCHP7 GCHP7 GCHP7 <br /> Conc. Spiked: 10yg/L 10pg/L 10ug/L 30pg/L <br /> 1 <br /> a <br /> Result: 8.1 8.3 8.1 26 <br /> MS % Recovery: 81 83 8.1 87 <br /> Dup. Result: 8.8 9.0 8.6 28 <br /> ' MSD% Recov,: 88 90 86 93 <br /> RPD: 8.3 8.1 6.0 7.4 <br /> RPD Limit: 0-500-50 0-50 0-50 <br /> .:::::::.::::..:::.....::..:.................................::..-.�:.:..,,.................. <br /> LCS#: BLK122695 BLK122695 BLK122695 BLK122695 <br /> Prepared Date: 12/26/95 12/26/95 12/26/95 12/26/95 <br /> ' Analyzed Date: 12/26/95 12/26/95 12/26/95 12/26/95 <br /> Instrument I.D.#: GCHP7 GCHP7 GCHP7 GCHP7 <br /> Conc. Spiked: 10,ug/L 10ug/L 10pg/L 30 jug/L <br /> ' LCS Result: 9.2 9.3 9.0 28 <br /> LCS % Recov.: 92 93 90 93 <br /> MS/MSD <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 /> 4 SEQUOIA ANALYTICAL 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 /> ( interference,the LCS recovery is to be used to validate the batch. <br /> Vickie Tague Clark <br /> ( Project Manager "x MS=Matrix Spike,MSD=MS Duplicate, RPD=Relative%Difference 9512G46.SSS <2> <br />