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0 • <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 /> Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921-9600 FAX(916)921.0100 <br /> Kleinfelder.... <br /> Client Project ID: 20 4054-01 <br /> ' 2825 East Myrtle St. Matrix. Soil/Water <br /> Stockton, CA 95205 <br /> Attention: Tony <br /> Martin Y QC Sample e Grou 8020578-0580 0 <br /> 580 <br /> Reported: <br /> Mar <br /> :::::,:::::::;:.;;:.;;; porte M 12 98:.;: <br /> XX X <br /> ' QUALITY CONTROL DATA REPORT <br /> ANALYTE: 1,1-Dichloro- Chloro- <br /> ethene Trichloroethene Benzene Toluene benzene Diesel <br /> Method: EPA 8260 EPA 8260 EPA 8260 EPA 8260 EPA 8260 DHS LUFT <br /> Analyst: K.Pocan K.Pocan K.Pocan K. Pocan K.Pocan C.Lee <br /> Concentration <br /> Spiked: 2,500 Ng/kg 2,500Ng/kg 2,500Ng/kg 2,500 Ng/kg 2,500 Ng/kg 12.5 mg/kg <br /> LCS Batch#: LCS030298 LCS030298 LCS030298 LCS030298 LCS030298 LCS022598 <br /> Date Prepared: 03/02/98 03/02/98 03/02/98 03/02/98 03/02/98 02/25/98 <br /> Date Analyzed: 03/02/98 03/02/98 03/02/98 03/02/98 03/02/98 02/25/98 <br /> Instrument I.D.#: MS-F1 MS-F1 MS-F1 MS-F1 MS-F1 GCHP-3B <br /> LCS % <br /> Recovery: 101 105 100 99 99 93 <br /> Control Limits: 65-135% 70-130% 70-130% 70-130% 70-130% 60-140% <br /> MS/MSD <br /> Batch #: 8020579 8020579 8020579 8020579 8020579 8020580 <br /> Date Prepared: 03/02/98 03/02/98 03/02/98 03/02/98 03/02/98 02/25/98 <br /> Date Analyzed: 03/02/98 03/02/98 03/02/98 03/02/98 03/02/98 02/25/98 <br /> Instrument I.D.#: MS-F1 MS-F1 MS-F1 MS-F1 MS-F1 GCHP-3B <br /> Matrix Spike <br /> % Recovery: 171 125 129 119 120 93 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery: 126 122 125 122 113 95 <br /> Relative % <br /> Difference: 30 2.4 3.2 2.5 6.0 2.1 <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 /> finda <br /> and are not used to acce t or reject batch results. <br /> C. Schneider <br /> Project Manager/Sacramento Laboratory <br /> 8020578.KLF <19> <br />