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Sequoia Ohesapeake Drive Redwood City,CA 94063 364-9600 FAX WS)364-9233 <br /> + Wiget Lane Walnut Creek,CA 94598 988-9600 FAX(510)988.9673 <br /> i 1nalvtical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921-9600 FAX.(ll6)92 1-91 i,y^^ <br /> EMCON Associates Client Project ID: Arco 2168, Stockton, CA <br /> 1433 N. Market Blvd. Matrix: Soil <br /> Sacramento, CA 95834 <br /> Attention: Claudio Avila QC Sample Grou 602-0612 Reported: Feb 22, 1996::: <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Trichloro- Chloro- <br /> 1.1-DCA ethene benzene <br /> Method: EPA 8010 EPA8010 EPA 8010 <br /> Analyst: K.Pocan K.Pocan K.Pocan <br /> Concentration <br /> Spiked: 10{1g/L 10pig/L 10pg/L <br /> LCS Batch#: LCS022196 LCS022196 LCS022196 <br /> Date Prepared: 02/21/96 02/21/96 02/21/96 <br /> Date Analyzed: 02/21/96 02/21/96 02/21/96 <br /> Instrument I.D.#: GC5 GC5 GC5 <br /> LCS % <br /> Recovery: 120 134 115 <br /> Control Limits: 70.130 70-130 70-130 <br /> MS/MSD <br /> Batch#: 6020519 6020519 6020519 <br /> Date Prepared: 02/21/96 02/21/96 02/21/96 <br /> Date Analyzed: 02/21/96 02/21/96 02/21/96 <br /> Instrument I.D.#: GC5 GC5 GCs <br /> Matrix Spike <br /> % Recovery: 108 116 107 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery: 109 117 107 <br /> Relative% <br /> Difference: 0.38 1.2 0.67 <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 OC limits for MS/MSD's are advisory only <br /> and are not used to accept or reject batch results. <br /> Janet rian ttt CCC <br /> Project Manager/Sacramento Laboratory <br /> 6020612.EMC <5> <br />