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Sequoia 680 Chesapeake Drive Redwood City,CA 911 (415) 364-9600 FAX(415) 364-9233 <br /> 404 N.Wiget Lane Walnut Creek,CA 94598 (510) 988-9600 FAX(510)988-9673 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921 <br /> -9600 FAX(916)921-0100 <br /> ... .............. <br /> 466"felder Client"Project 10: 20-3937-01 <br /> L2825 East Myrtle St. Matrix: Soil <br /> Stock-ton, CA 95205 <br /> Attention: Tony Martin QC Sample Group 6071215, 17, 20, 23, 26-27 Reported: Aug 8, 11996. <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE: 1,1-Dichloro- Chloro- <br /> ethane Trichloroethene Benzene Toluene benzene <br /> Method: EPA 8260 EPA 8260 EPA 8260 EPA 8260 EPA 8260 <br /> Analyst: W.Amundsen W.Amundsen W.Amundsen W.Amundsen W.Amundsen <br /> Concentration <br /> Spiked: 2500 ug/kg 2500 ug'/kg 2500-ug/kg 2500 ug/kg 2500 ug/kg <br /> LCS Batch#: LCS080696 LCS080696 LC$080696 LCS080696 LCS080696 <br /> Date Prepared: 08/06/96 08/06-/96 08/06/96 08/06/96 08/06/96 <br /> Dale Analyzed: 08/06/96 08/06/96 08/06/96 08/06/96 - 08/06/96 <br /> Instrument I.D.#: MS-F1 MS-Fl MS-F1 NIS-F1 MS-F1 <br /> LCS % <br /> Recovery: 131 110 117 109 108 <br /> Control Limits: 59-172 62-137 66-142 59-139 60-133 <br /> .............. <br /> "X......... <br /> ...... .... <br /> MS/MSD <br /> Batch #: 6071226 6071226 6071226 6071226 6071226 <br /> L Date Prepared: 08/06/96 08/06/96 08/06/96 08/06/96 08/06/96 <br /> Date Analyzed: 118/06/96 08/06/96 08/06/96 08/06/96 08/06/96 <br /> Instrument I.D.#: MS-F1 MS-F1 MS-F1 MS-171 MS-F1 <br /> Matrix Spike <br /> %Recovery: 193 114 127 117 116 <br /> Matrix Spike <br /> Duplicate % <br /> Recovery: 222 120 133 126 117 <br /> Relative% <br /> Difference: 14 5.0 43 7.3 1.1 <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 /> Linda/C. Schneider <br /> Project Manager/Sacramento Laboratory <br /> 6071215.KLF <24> <br />