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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (415) 364-9600 FAX(415) 364-9733 <br /> ;�;rrr......������ff��■iii 404 N.Wiget Tanc Walnut Creek,C4 94598 (510) 988.9600 FAX(510) 988-9673 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento, CA 95834 (916) 921-9600 FAX(916)921.0100 <br /> Delta �rlvirorimental Consultants Client project ED i iaocon#7-3330, Stockton, CA......... <br /> <:3164 Gold Camp Dr-, Suite 200 Matrix: Water <br /> <` Rancho Cordova, CA 95670 <br /> Attention: C. Keoni Almeida QC Sample Group 6011034-37 Reported: Feb 2, 1996 '. <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Ethyl- <br /> Benzene Toluene Benzene X Penes <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#: LCSG13096 LCS013098 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: 103 104 106 107 <br /> Control Limits: 75-125 75-125 75.125 75-125 <br /> MS/MSD <br /> Batch #: 6011051 6011051 5011051 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 01/30/95 <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 /> Dupficate% <br /> Recovery: Be 89 92 89 <br /> Relative % <br /> Difference: 16 14 11 16 <br /> SEQUOIA ANALYTII AL Please Note: <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 /> /• L L /J validation of sample batch results. flue to matrix effects,the CC limits for MS/MSG's are advisory only <br />/ Linda C. Schneider and are not used to accept or reject batch results. <br /> Project Manager <br /> 6011034.f]LT <3> <br />