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1 Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (415) 364-9600 FAX(415) 364-9233 <br /> 404 N.Wigct Lane Walnut Creek, CA 94598 (510) 988-9600 FAX(5l0)988-9673 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921.9600 FAX(916)92 1-0 100 <br /> delta 1=nvlronmental Consultants Cllent Protect Ib: �o(on #7330, Stacfcton, CA <br /> 3164 Gold Camp Dr., Suite 200 Matrix: Water <br /> Rancho Cordova, CA 95670 <br /> Attention: C. Keani Almeida OC Sample Group 6011034A-37A Reported: Feb 2, 1996771.' <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Ethyl- <br /> Benzene Toluene Benzene Xylenes <br /> Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Analyst: B.Williams B.Williams B.Williams B.Williams <br /> Concentration <br /> Spiked: 10 ug/L 10 ug/L 10 ug/L 30 ug/L <br /> LCS Batch#: LCS013096 LCS013096 LCS013096 LCS013096 <br /> Date Prepared: 01/30/96 01/30/96 01/30/96 01/30/96 <br /> Date Analyzed: 01/30/96 01/30/96 01/30/96 01/30/96 <br /> Instrument I.D.#: GCHP-2 GCHP-2 GCHP-2 GCHP-2 <br />. LCS % <br /> Recovery: 103 104 105 107 <br /> Control Limits: 75-125 75-125 75-125 75-125 <br /> i <br /> MS/MSD <br /> Batch #: 6011051 6011051 6011051 6011051 <br /> Date Prepared: 01/30/96 01/30/96 01/30/96 01/30/96 <br /> Date Analyzed: 01/30/96 01/30/96 01/30/96 01/30/96 <br /> Instrument I.D.#: GCHP-2 GCHP-2 GCHP-2 GCHP-2 <br /> Matrix Spike <br /> % Recovery: 101 102 103 104 <br /> Matrix Spike <br /> Duplicate % <br /> Recovery: 86 89 92 89 <br /> Relative% <br /> Difference: 16 14 11 16 <br /> SEfQUOIA ANALYTICAL Please Note:11� <br /> Th11" e LCS is a control sample of known,interferent free matrix that is analyzed using the same reagents. <br /> i�y7 j /j ii� 4; r 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 CC limits for IVIS/MSD's are advisory only <br />✓' Linda C. Schneider and are not used to accept or reject batch results. <br /> Project Manager <br /> 6011034A.DLT <3> <br /> .k� <br />