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Sequo <br /> x � 680 Chesapeake Drive Redwood City, 063 (415) 364.9b00 FAX(415) 364-9233 <br /> Analytical 404 N.Wiget Lane Walnut Creek, CA 94598 (510) 988-9600 FAX(510)988-9673 <br /> 819 Striker Avenue,Suite 8 Sacramento, CA 95834 (916) 921.9600 FAX(916)921-0100 <br /> Browri &Caldwell.. <br /> oierit Project ID: Arco 5450,.Stocjcton <br /> 9616 Micron Ave., Suite 600 Matrix: Soil <br /> Sacramento, CA 95827 <br /> Attention: Steve Misner QC Sample Group 510-1284 ort R <br /> e <br /> ... ..... p ed. Nov 6, 199 <br /> 5 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Ethyl- <br /> Benzene Toluene Benzene Xyienes <br /> Method:. EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Analyst: J.Woo J.Woo J.Woo J.Woo <br /> Concentration <br /> Spiked: 10 ug/L 10 ug/L 10 ug/L 30 ug/L <br /> LCS Batch#: LCS102795A LCS102795A LC8102795A LCS102795A <br /> Date Prepared: 11/2/95 11/2/95 11/2/95 11/2/95 <br /> Date Analyzed: 11/2/95 11/2/95 11/2/95 11/2/95 <br /> Instrument I.D.#: GCHP-20 GCHP-20 GCHP-20 GCHP-20 <br /> LCS % <br /> Recovery: 100 100 100 103 <br /> Control Limits: 71-133 72-128 72-130 71-120 <br /> .......................................:..... ::::._..........:.:.:::..::.,..::::.::.:._:._:._.:_:.:::::::::::.:::::............. <br /> ............. <br /> MS/MSD <br /> Batch#: 9511G11-11E 9511G11-11E 9511G1i-11E 9511G11-11E <br /> Date Prepared: 111/2/95 11/2/95 11/2/95 11/2/95 <br /> Date Analyzed: 11/2/95 11/2/95 11/2/95 11/2/95 <br /> Instrument I.D.#: GCHP-20 GCHP-20 GCHP-20 GCHP-20 <br /> Matrix Spike <br /> % Recovery. 110 110 110 107 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery: 110 110 110 110 <br /> Relative% <br /> Difference: 0.0 0.0 0.0 3.1 <br /> SEQUOIA ANALYTICAL Please mote: <br /> The LCS is a control sample of known,interferent free matrix that is analyzed using the same reagents, <br /> preparation and analytical methods employed for the samples. The LCS%recovery data is used for <br /> validation of sample batch results. Due to matrix effects,the OC limits for MS/MSD's are advisory only <br /> Janet H an and are not used to accept or reject batch results. t <br /> Project anager <br /> 5101284.BRS <2> I <br />