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Sequoia Whesapeake Drive Redwood City,CA 94063 ) 364-9600 FAX (415) 364-9233 <br /> 404 N.Wiget Lane Walnut Creek,CA 94598 0) 988-9600 FAX (510)988-9673 <br /> Sacramento,CA 95834 (916) 921-9600 FAX (916)921-0100 <br /> Analytical 819 Striker Avenue,Suite 8 <br /> Roy F. Weston Client Project ID' Munco <br /> 2300 Clayton Rd., Suite 1580 Matrix: Soil <br /> Concord, CA 94520-2148 <br /> Attention: David Marks OC Sample Group: 5070106-112 Reported: Jul 21, 1995 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Ammonia Ammonia Nitrate Nitrate <br /> Method: EPA 350.3 EPA 350.3 EPA 300.0 EPA 300.0 <br /> Analyst: V.Owens V.Owens R.Salinas R.Salinas <br /> Concentration <br /> Spiked: too mg/L 100 mg/L 10 mg/L 10mg/L <br /> LCS Batch#: LCS071495 LCS071895 LCS070595 LCS071395 <br /> Date Prepared: 7/14/95 7/18/95 7/5/95 7/13/95 <br /> Date Analyzed: 7/14/95 7/18/95 7/7/95 7/13/95 <br /> Instrument I.D.#: pH-1 pH-1 INIC 1 INIC 1 <br /> LCS % <br /> Recovery: 101 100 98 97 <br /> Control Limits: 80-120 80-120 80-120 80-120 <br /> ........... <br /> MS/MSD <br /> Batch#: 5070327 5070109A 5070120 5070543 <br /> Date Prepared: 7/14/95 7/18/95 7/7/95 7/13/95 <br /> Date Analyzed: 7/14/95 7/18/95 7/7/95 7/13/95 <br /> Instrument I.D.#: pH-1 pH-1 INIC I INIC 1 <br /> Matrix Spike <br /> % Recovery: 105 91 97 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery: 105 91 97 <br /> Relative % <br /> Difference: 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 /> 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 /> and are not used to accept or react batch results. -Matrix interference. <br /> Linda C. Schneider <br /> Project Manager 5070106,ROY <5> <br />