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SEQUOIA ANAL.` I-ICAL <br /> 819 Striker Avenue, Suite 8 • Sacramento, CA 95834 <br /> (916) 921-9600 • FAX (916) 921-0100 <br />_%PRO <br /> Tse <br /> eelod ar-'86k'n 696y Lane, Ste. 160 Matrix: Water, CA 96678 <br /> :< <br /> Attention Sheila Richgels CC Sample Group: 3090335-338 <br /> Reported <br /> CSep 16, 1993 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Ethyl <br /> Benzene Toluene benzene Xylenes <br /> Method: EPA 602 EPA 602 EPA 602 EPA 602 <br /> Analyst: M.Nipp M.Nipp M.Nipp M.Nipp <br /> Concentration <br /> Spiked: 10 ug/L 10 ug/L 10 ug/L 30 ug/L <br /> LCS Batch#: BLK091493 BLK091493 BLK091493 BLK091493 <br /> Date Prepared: N/A N/A N/A N/A <br /> Date Analyzed: 9/14/93 9/14/93 9/14/93 9/14/93 <br /> Instrument I.D.#: GCHP2 GCHP2 GCHP2 GCHP2 <br /> LCS % <br /> Recovery: 110 110 110 110 <br /> 4 <br /> Corttroi Limits: 80-120 80-120 80-120 80-120 <br /> MS/MSD <br /> Batch##: G93 09 451 G93 09 451 G93 09 451 G93 09 451 <br /> Date Prepared: N/A N/A N/A N/A <br /> Date Analyzed: 9/14/93 9/14/93 9/14/93 9/14/93 <br /> Instrument I.D.#: GCHP2 GCHP2 GCHP2 GCHP2 <br /> Matrix Spike <br /> %Recovery: 110 110 110 110 <br /> Matrix Spike <br /> Duplicate % <br /> Recovery: 110 110 110 110 <br /> Relative% <br /> Difference: 0.0 0.0 0.0 0.0 <br /> Please Note: <br /> The LCS is a control sample of known,interferent free matrix that is analyzed using the same reagents, <br /> jDUOIA ANALYTICAL 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/MSG's are advisory only <br /> and are not used to accept or reject batch results. <br /> Linda C. Schneider <br /> Project Manager 3090335 AEG <3> <br />