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Sequoia fi80 Che eake Drive Redwood Cityv__A063 (650)364-9600 FAX(650)364-9233 <br /> 404 N.Wiget Lane Walnut Creek,CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 819 Striker Avenue.Suite 8 Sacramento,CA 95834 (916)921-9600 FAX(916)92 1-0 100 <br /> Analytical 1455 McDowell Blvd North.Ste. D Petaluma,CA 94954 (707) 792-1865 FAX(707) 792-0342 <br /> 1551 Industrial Road San Carlos.CA 94070-41 1 1 (650)232-9600 FAX(650)232-9612 <br /> Secor Client Project ID: Arco # 434, Lodi <br /> 9912 Business Park Dr., Ste 100 Matrix: Solid <br /> Sacramento, CA 95827 <br /> Attention. Rusty Benkosky QC Sample Group: 9061819-824 Reported: Jun 28, 1999` <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> OC Batch#: SP062399 SP062399 SP062399 SPG62399 <br /> 8020EXA 8020EXA 8020EXA 8020EXA <br /> Analy. Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep. Method: EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst: D.Newcomb D. Newcomb D. Newcomb D.New <br /> MS/MSD #: 9061819 9061819 9061819 9061819 <br /> Sample Conic-: N.D. N.D. N.D. N.D. <br /> Prepared Date: 6/23/99 6/23/99 6/23/99 6/23/99 <br /> Analyzed Date: 6/23/99 6/23/99 6/23/99 6/23/99 <br /> Instrument I.D.#: HP-4 HP-4 HP-4 HP-4 <br /> Conic. Spiked: 0.80 mg/Kg 0.80 mg/Kg 0.80 mg/Kg 2.4 mg/Kg <br /> Result: 0.80 0.67 0.70 2.3 <br /> MS % Recovery: 100 84 88 96 <br /> Dup. Result: 0.78 0.66 0.69 2.3 <br /> MSD % Recov.: 98 83 86 96 <br /> RPD: 2.5 1.5 1.4 0.0 <br /> RPD Limit: 0-20 0-20 0-20 0-20 <br /> LCS #: 4LCS062499 4LCS062499 4LCS062499 4LCS062499 <br /> Prepared Date: 6/24/99 6/24/99 6/24/99 6/24/99 <br /> Analyzed Date: 6/24/99 6/24/99 6/24/99 6/24/99 <br /> Instrument I.D.#: HP-4 HP-4 HP-4 HP-4 <br /> Conic. Spiked: 0.80 mg/Kg 0.80 mg/Kg 0.80 mg/Kg 2.4 mg/Kg <br /> LCS Result: 0.77 0.65 0.68 2.3 <br /> LCS % Recov.: 76 79 84 86 <br /> LCS 50150 50-150 50-150 50-150 <br /> Control Limits <br /> Ffortified <br /> : <br /> is a control sample of known,interferent-tree matrix that is analyzed using the same reagents, <br /> SEQUOIA ANALYTICAL, #1271 ,and analytical methods employed for the samples. The matrix spike is an aliquot of sample <br /> / known quantities of specific compounds and subjected to the entire analytical procedure. If <br /> Amp <br /> of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> ,the LCS recove is to be used to validate the batch. <br /> ha V "Ms=Matrix Spike, MSD=MS Duplicate,RPD=Relative%Difference <br /> Project Manager <br /> 9061819.SSS <4> <br />