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(D Sequoia 680 Chesapeake Drive Redwood GM CA 94063 (415) 364-9600 FAX(415)364-9233 <br /> 404 N Wiget Lane Walnut Crede,CA 94598 (510) 988-9600 FAX(510)988 9673 <br /> AwrAnalytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Ougro West, Inc Client P'roj`ect Ib kaon#7-0137, Stockton v <br /> 1050 Melody Lane, Ste 160 Matrix Water <br /> " Roseville, CA 95678 } <br /> Attention Mark Naugle QC Sample Group 6011075-81 Reported Feb 7, 1996 <br /> . ,. .. .,.,, vim.weT.c ,3-„ I 1 . a".. <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, 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#• LCS020196 LCS020196 LC8020196 LCS020196 <br /> Date Prepared: 02/01/96 02/01/96 02/01/96 02/01/96 <br /> Date Analyzed 02/01/96 02/01/96 02/01/96 02/01/96 <br /> Instrument I D #' GCHP-1 GCHP-1 GCHP-1 GCHP-1 <br /> • LCS <br /> Recovery: 105 107 107 las <br /> Control Limits: 75-125 75-125 75-125 75-125 <br /> MS/MSD <br /> Batch #, 6011216 6011216 6011216 6011216 <br /> Date Prepared: 02/01/96 02/01/96 02/01/96 02/01/96 <br /> Date Analyzed: 02/01/96 02/01/96 02/01/96 02/01/96 <br /> Instrument 1 D.#: GCHP-1 GCHP-1 GCHP-1 GCHP-1 <br /> Matrix Spike <br /> % Recovery: 103 104 105 106 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery: 103 105 104 107 <br /> Relative% <br /> Difference: 00 096 096 0.94 <br /> SE{,l OIA ANALYTICAL 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 /> validation of sample batch results Due to matrix effects,the QC limits for MS/MSD's are advisory only <br /> Linda C Schn Ider and are not used to accept or reject batch results <br /> Project Manager/Sacramento Labora dry <br /> 6011075 FUG <5> <br />