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Sequoia680 Chesapeake Drive Redwood City, CA 94063 (415) 364.9600 FAX(415) 364-9233 <br /> 404 N.eget lane Walnut C'eck, CA 94598 (510) 988-9600 FAX(510)988.9673 <br /> Analytical 819 Striker Avenue,Suite a Sacramento,CA 95834 (916) 921-9600 FAX(916)921-4100 <br /> hello rlvlronmental+Consultants Client Project lD. kaon #7 330, <br /> 3164 Gold Camp Dr., Suite 200 Matrix: Water <br /> Rancho Cordova, CA 95670 <br /> Attention: C. Keoni Almeida QC Sample Group 6040576-79 Reported. Apr 22, 1996>` <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Ethyl- <br /> Benzene Toluene Benzene Xylenes <br /> Method: EPA 8020 EPA 8020 EPA 8020 EPA 8029 <br /> Analyst: V.Owens V.Owens V.Owens V.Owens <br /> Concentration <br /> Spiked: 10 ug/L 10 ug/L 10 ug/L 30 ug/L <br /> LCS Batch#: LCS041896 LCSO41896 LCSO41896 LCS041896 <br /> Date prepared: 04/18/56 04/18/96 04/18/96 04/18/96 <br /> Date Analyzed: 04/16/96 04/18/96 04/18/96 04/18/96 <br /> Instrument I.D.#: GCHP-1 GCHP-1 GCHP-1 GCHP-1 <br /> LCS % <br /> Recovery: 94 95 97 97 <br /> Control Limits. 75-125 75-125 75-125 75-125 <br /> MS/MSD <br /> Batch #: 6040694 6040694 6040694 6440694 <br /> Date Prepared- 04/18/96 04/18/96 04/18/96 04/18/96 <br /> Date Analyzed: 04/18/96 04/18/96 04/18/96 04/16/96 <br /> Instrument l.D.#: GCHP-1 GCHP-1 GCHP-1 GCHP-1 <br /> Matrix Spike <br /> % Recovery: 84 84 87 91 <br /> Matrix Spike <br /> Duplicate % <br /> Recovery: 87 fib 90 91 <br /> Relative % <br /> Difference: 3.5 2.4 3.4 0.0 <br /> SEQUOIA ANALYTICAL Please Note: <br /> % The LCS is a control sample of known,interferent tree matrix that is analyzed using the same reagents, <br /> fli I preparation and analytical methods employed ter the samples. The LCS%recovery data is used for <br /> LC�/ validation of sample batch results. Due to matrix effects,the oC limits for MS/MSD's are advisory only <br /> Linda C. Schneider and are not used to accept or reject batch results. <br />/I Project Manager/Sacramento Laboratory <br /> 5040576-DLT <5> <br />