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• <br /> Sequoia 680 Chesapeake Drive Redwood City,CA 91b)63 (415) 364-96M FAX(415)364-9233 <br /> 404 N.Wiget Lane Walnut Creek,CA 94598 (510) 988.9600 FAX(510)998-9673 <br /> 8 19 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921-9600 FAX(916)921.0100 <br /> Analytical <br /> kf <br /> -01. 01 <br /> lri a der" 'CI enroje 20 <br /> 2825 East Myrtle St. <br /> Matrix: Soil <br /> Stockton, CA 95205 <br /> Attention: Tony Martin QC Sample Group 7020483-84 Reported: Feb 21, 11997:',: <br /> x —------------ <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Ethyl- <br /> Benzene Toluene Benzene Xylenes Diesel Lead <br /> Method, EPA 8020 EPA 8020 EPA 8020 EPA 8020 DHS Luft EPA 6010 <br /> Analyst: C.Lee C.Lee C.Lee C. Lee C.Lee M.C. <br /> Concentration <br /> Spiked: 0.20 mg/kg 0.20 mg/kg 0.20 mg/kg 0.60 mg/kg 7.5 mg/kg 50 rtig/kg <br /> LCS Batch#: LCS021997 LCS021997 LCS021997 LCS021997 LCS021997 LCS021997A <br /> Date Prepared: 02/19/97 02/19/97 02/19/97 02/19/97 02/19/97 02/19/97 <br /> Date Analyzed: 02/19/97 02/19/97 02/19/97 02/19/97 02/19/97 02/21/97 <br /> Instrument I.D.#: GCHP-1 GCHF-1- GCHP-1 GCHP-1 GCHP-3B ICP-1 <br /> LCS % <br /> Recovery: 81 84 87 88 91 99 <br /> Control Limits: 70-130 70-130 70-130 70-130 60-140 80-120 <br /> ........... <br /> K. <br /> ........ ................ <br /> MS/MSD <br /> Batch#: 7020364 7020364 7020364 7020364 7020483 7020460 <br /> Date Prepared: 02/19/97 02/19/97 02/19/97 02/39/97 02/19/97 02/19/97 <br /> Date Analyzed: 02/19/97 02/19/97 02/19/97 02/19/97 02/19/97 02/21/97 <br /> Instrument I.D.#: GCHP-1 GCHP-1 GCHP-11 GCHP-1 GCHP-3B ICP-1 <br /> Matrix Spike <br /> %Recovery: 78 82 86 88 102 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery: 69 72 73 77 101 <br /> Relative% <br /> Difference: 12 13 16 13 0.99 <br /> SEQUOIA ANALYTICAL Please Note: <br /> The LCS is a control sample of known,interferent free matrix that is analyzed using the same reagents, <br /> M 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/MSDs are advisory only <br /> Edana M. Beischner and are not used to accept or reject batch results. Matrix interference. <br /> Project Manager/Sacramento Labor-50—ry <br /> 7020483.KLF <5> <br />