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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (415) 364.9600 FAX(415) 364.9233 <br /> 404 lN.Wiget lane Walnut Creek,CA 94598 (510) 988-9600 FAX(510)988.9673 <br /> r X117 Analyieal <br /> 819S Avenue,Suite 8 Sacramento,CA 95834 (916) 921.9600 FAX(916)921.0100 <br /> li <br /> P <br /> l <br /> Pacificnlrorirriental Group, fnc. Client Project ID: Arco 2083, `racy, CA <br /> 11315 Sunrise Gold Circle, #M Matrix: Water <br /> Rancho Cordova, CA 95742 <br /> Attention: Greg Barclay OC Sample Group 6110672-78' Reported: Dec 3, 1996:::: <br /> - :. <br /> QUALITY CONTROL DATA REPORT <br /> r <br /> 1 <br /> ANALYTE Ethyl 11 <br /> - <br /> Benzene Toluene Benzene iR Xylenes. <br /> { i <br /> Method: EPA 8020 EPA 8020 EPA 8020 i EPA 8020 <br /> Analyst: B.Williams B,Williams B.Williams :4 B.Williams <br /> Concentration <br /> Spiked: 10 ug/L 10 ug/L 10 ug/L 30 ug/L <br /> �i <br /> LCS Batch#: LCS112696 LCS112696 LCS112696 .i LCS112696 ' <br /> Date Prepared: 11/26/96 11/26/96 11/26/96 :I' 11/26/96 <br /> } Date Analyzed: 11/26/96 11/26/96 11/26/96 I: 11/26/96 r <br /> Instrument I.Q.#: GCHP-1 GCHP-1 GCHP-1 6 GCHP-1 <br /> LCS % <br /> Recovery: 97 100 102 i 99 <br /> Control Limits: 70-130 70-130 70-130 70.130 j <br /> i <br /> :,.. <br /> .:........ .. _. <br /> I <br /> MS/MSD <br /> Batch #: 6111150 6111150 6111150 6111150 <br /> Date 26 26/96 Prepared: 11 11 96 11/26/96 '� 11/26/96 <br /> P l I I <br /> Date Analyzed: 11/26/96 11/26/96 11/26/96 11/26/96 <br /> Instrument I.D.#: GCHP-1 GCHP-1 GCHP-1 i GCHP-1 <br /> I- <br /> Matrix Spike i <br /> % Recovery: 100 96 97 " 97 <br /> li <br /> Matrix Spike + <br /> ' Duplicate % <br /> Recovery: 95 96 98 99 <br /> Relative % <br /> Difference: 5.1 0.0 1.0 2.0 <br /> i; <br /> SEQUOIA ANALYTICAL Please Note: <br /> 7 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 QC limits for MS/MSD's are advisory only <br /> w. <br /> Linda C. Schneider and are not used to accept or reject batch results. <br /> Project Manager/Sacramento Labora ory <br /> 6110672.PES <5> <br />