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Sequoia 660 Chesapeake Drive Redwood City,CA 94063 (415) 364-9600 FAX(415) 364-9233 <br /> ,S) 1900 Bates Avenue,Suite L Concord,CA 94520 (510) 6869600 FAX(510)686-9689 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921-9600 FAX(916)921-0 100 <br /> Del-Tech Client Project Ib: Farmington Fire Dept <br /> 10624 Olive Ave. Matrix: Soil <br /> Oakdale, CA 95361 <br /> Attention: Don Light QC Sample Group: 5050749-750 Reported: May 23, 1995 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE <br /> Lead <br /> Method: EPA 6010 <br /> Analyst: K. Barta <br /> Concentration <br /> Spiked: 50 mg/kg <br /> LCS Batch#: LCS051595 <br /> Date Prepared: 5/15/95 <br /> Date Analyzed: 5/15/95 <br /> Instrument I.D.#: P-40 <br /> LCS % <br /> Recovery: 96 <br /> Control Limits: 60-120 <br /> MS/MSD <br /> Batch#: 5050529 <br /> Date Prepared: 5/15/95 <br /> Date Analyzed: 5/15/95 <br /> Instrument I.D.#: P-40 �{j] <br /> Matrix Spike <br /> %Recovery: 86 <br /> �ulv 15 1995 <br /> Matrix Spike <br /> Duplicate% ENVIRONMENTAL HEALTH <br /> Recovery: s1 pERMIT/SERVICES <br /> Relative % <br /> Difference: 3.4 <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 reject batch results. <br /> Janet clan <br /> Project Manager <br /> 5050749.DDD <2> <br /> g� <br />