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-=;SEQUOM ANALYTICAL <br /> 680 Chesapeake Drive-• Redwood City, CA 94063 <br /> (415) 364-9600 • FAX(415) 364-9233 <br /> ;RESNA Client Project ID. F71.32.93, Quik Stop #132 <br /> >'3315 Almaden Expwy., Suite 34 Matrix: Liquid <br /> :San Jose, CA 95118 <br /> ;:Attention: Rich Garlow QC Sample Group: 4B79101-2 Reported Feb 24 1994 <br /> QUALITY-sj <br /> r Or <br /> CONTROL.DATA YREPORT <br /> ' I ANALYTE Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Analyst: A Maralit A. Marafit A Mara!:'. A. Maralit <br /> MS/MSD <br /> Batch#: 4B67802 4667802 4867802 4B67802 <br /> Date Prepared: - <br /> Date Analyzed: 2/14/94 2/14,'94 2/14.9- 2/14!94 <br /> Instrument.I.:D.#: CCHP-17 GCHP-17 GCHP- ' GCHP-17 <br /> Conc. Spiked: iop9/L 104, L 1opa _ 30N4/L <br /> L.� Matrix Spike <br /> % Recovery: 89 89 88 90 <br /> Matrix Spike <br /> Duplicate % <br /> Recovery: 97 97 46 97 <br /> Relative % <br /> .Difference: 8.6 8.6 8.7 7.5 <br /> LCS Batch#: = <br /> Date Prepared: <br /> Date Analyzed: <br /> Instrument I.D.#: <br /> LCS % <br /> L„ Recovery: - <br /> ' �' % Recovery <br /> Control Limits: 71-133 72-128 72-130 71-120 <br /> Please Note: <br /> The LCS is a control sample of known,interferent free matrix that is analyzed using the same reagents, <br /> EQUOIA ANALYTICAL preparation,and analytical methods employed for the samples. The matrix spike is an aliquot of sample <br /> fortified with known quantities of specific compounds and subjected to the entire analytical procedure. It <br /> the recovery of analytes from the-matrix spike does not fall within specitied control limits due to matrix <br /> interference,the LCS recovery is to be used to validate the batch. <br /> Vickie Tague <br /> Project Manager 4879101.RES <2> <br />