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1 • a <br /> Sequoia 680 Chesapeake Drive Redwood City, CA 94063 (650) 364.9600 FAX(650)364-9233 <br /> 404 N.Wiget Lane Walnut Creek,CA 94598 (510) 988.9600 FAX(510)988-9673 <br /> frill' Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921-9600 FAX(916)92 1-0 100 <br /> ................... <br /> Kleinfelder <br /> Client Project ID. 20-4054-01.E01 <br /> 2825 East Myrtle St. Matrix. Soil/Water <br /> Stockton, CA 95205 <br /> ,'.'.Attention: Tony Martin QC Sample Group 8020746-0757 Reported: Mar 16, 1998.. <br /> IQUALITY CONTROL DATA REPORT <br /> ANALYTE: 1,1-Dichloro- Chloro- <br /> , ethene Trichloroethene Benzene Toluene benzene <br /> Method: EPA 8260 EPA 8260 EPA 8260 EPA 8260 EPA 8260 <br /> Analyst: K.Pocan K. Pocan K.Pocan K.Pocan K.Pocan <br /> Concentration <br /> Spiked: 2,500 Ng/kg 2,500 Ng/kg 2,500 Ng/kg 2,500 pg/kg 2,500Ng/kg <br /> LCS Batch#: LCS030698 LCS030698 LCS030698 LCS030698 LCS030698 <br /> Date Prepared: 03/06/98 03/06/98 03/06/98 03/06/98 03/06/98 <br /> Date Analyzed: 03/06/98 03/06/98 03/06/98 03/06/98 03/06/98 <br /> Instrument I.D.#: MS-F1 MS-F1 MS-F1 MS-F1 MS-F1 <br /> LCS % <br /> Recovery: 92 109 106 101 95 <br /> Control Limits: 65-135% 70-130% 70-130% 70-130% 70-130% <br /> MS/MSD <br /> Batch #: 8020579 8020579 8020579 8020579 8020579 <br /> Date Prepared: 03/02/98 03/02/98 03/02/98 03/02/98 03/02/98 <br /> Date Analyzed: 03/02/98 03/02/98 03/02/98 03/02/98 03/02/98 <br /> Instrument I.D.#: MS-F1 MS-F1 MS-F1 MS-F1 MS-F1 <br /> Matrix Spike <br /> % Recovery: 171 125 129 119 120 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery: 126 122 125 112 109 <br /> Relative% <br /> Difference: 30 2.4 3.2 6.1 9.6 <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 <br /> Project Manager/Sacramento Laboratory <br /> 8020752.KLF <28> <br />