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Mm <br /> I <br /> Sequoia 680 Chesapeake Drive Redwood City,CA 944 (415) 3649600 FAX(415) 364-9233 <br /> 1a) 404 N.Wiget Lane Walnut Creek,CA 94598 (510) 988-9600 FAX(510)988-9673 <br /> X117 Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (9t6) 921-9600 FAX (916)9210100 <br /> L <br /> Kleinfelder Client Project ID:' 20-393V-01 <br /> 2825 East Myrtle St. Matrix: Soil <br /> Stockton, CA 95205 <br /> Attention: Tony Martin QC Sample Group 6071215, 17, 20, 23, 26-27 Reported: Aug 8, 1996;: <br /> . <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE: 1,1-Dichloro- Chloro- <br /> ethene Trichloroethene Benzene Toluene benzene <br /> L <br /> Method: EPA 8260 EPA 8.260 EPA 8260 EPA 8260 EPA 8260 <br /> Analyst: W.Amundsen W.Amundsen W.Amundsen W.Amundsen W.Amundsen <br /> LConcentration <br /> Spiked: 2500 ug/kg 2500 ug/kg 2500 ug/kg 2500 ug/kg 2500 ug/kg <br /> LCS Batch#: LCS080596 LCS080596 LCS080596 LCS080596 LCS080596 <br /> L <br /> Date Prepared: 08/05/96 08/05/96 08/05/96 08/05/96 08/05/96 <br /> Date Analyzed: 08/05/96 08/05/96 08/05/96 08/05/96 08/05/96 <br /> LInstrument I.D.#: MS-171 MS-F1 MS-F1 MS-F1 MS-F1 <br /> LCS <br /> Recovery: 115 120 122 121 119 <br /> Control Limits: 65-135 70-130 70-130 70-130 70-130 <br /> :.;:•:: <br /> MS/MSD <br /> Batch #: 6071226 6071226 6071226 6071226 6071226 <br /> Date Prepared: 08/05/96 08/05/96 08/05/96 08/05/96 08/05/96 <br /> Date Analyzed: 08/05/96 08/05/96 08/05/96 08/05/96.; 08/05/96 <br /> LInstrument I.D.#: MS-171 MS-F1 MS-F1 MS-F1 MS-F1 <br /> Matrix Spike <br /> L % Recovery: 193 114 127 117 116 <br /> Matrix Spike <br /> Duplicate% <br /> LRecovery: 222 120 133 126 117 <br /> Relative% <br /> Difference: 14 5.0 4.3 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 acce t or reject batch results. <br /> /Linda C. Sc(nelder <br /> Project Manager/Sacramento Laboratory <br /> 6071215.KLF <23> <br /> a <br />