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' r I <br /> 4D Sequoia 8o Chesapeake Drive Redwood City,CA 9406315) 364-9600 FAX(415) 364-9233 <br /> 404 N.Wiget Lane Walnut Creek,CA 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 /> Del-Tech :::.:. ....... .....:. :....:.. <br /> Clienf projecf 1D. Quarterly G.WI. Monitoring <br /> 10624 Olive Ave. Matrix: Water <br /> Oakdale CA 95361 <br /> Attention Don Light QC Sample Group: 6040384-89 Reported: Apr 17, 1996 : <br /> P p <br /> I <br /> QUALITY CONTROL DATA REPORT <br /> ,i <br /> ANALYTE Trichloro- Chloro- <br /> 1,1-DCA ethene benzene <br /> Method: EPA 601 EPA 601 EPA 601 <br /> Analyst: K:Pocan— 4 K.'Pocan K.Focan <br /> Concentration <br /> Spiked: 10ug/L 10ug/L 10ug/L I <br /> I <br /> LCS Batch#: LCSO41296 LCSO41296 LCSO41296 <br /> Date Prepared: 04/12/96 04/12/96 04/12/96 <br /> Date Analyzed: 04/12/96 04/12/96 04/12/96 <br /> Instrument I.D.#: GC-6 GC-6 GC-6 <br /> LCS % <br /> Recovery: 85 77 80 <br /> Control Limits: 70.130 70-130 70-130 <br /> :.:. .....:. ......... <br /> f <br /> MS/MSD <br /> Batch#: 6040296 6040296 6040296 <br /> Date Prepared: 04/09/96 04/09/96 04/09/96 <br /> Date Analyzed: 04/09/96 04/09/96 04/09/96 <br /> Instrument I.D.#: GC-6 GC-6 GC-6 <br /> Matrix Spike <br /> %.Recovery: 92 90 84 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery: 71 66 71 <br /> Relative% <br /> Difference: 26 31 17 <br /> Please Note: <br /> The LCS is a control sample of known,interferent free matrix that is analyzed using the same reagents, <br /> SEQUOIA 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/MSD's are advisory only <br /> f ` <br /> { 111��1 (IM K 'k and are not used to accept or reject batch results. 1 <br /> Linda C. Sneider <br /> 'Project Manager/Sacramento Laboratory <br /> 6040384.DDD <8> <br />