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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 /> .. ... ... <br /> Kleinfelder Client Project ID 20-4054-01 <br /> 2825 East Myrtle St. Matrix. Soil/Water <br /> Stockton, CA 95205 <br /> Attention: Tony Martin OC Sample Grou 8020578-0580 Reported: Mar 12, 1998::::: <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE 2,4-Dinitro- Penta- <br /> Acenaphthene 4-Nitrophenol toluene chlorophenol Pyrene <br /> Method: EPA 8270 EPA 8270 EPA 8270 EPA 8270 EPA 8270 <br /> Analyst: E. Manuel E.Manuel E.Manuel E. Manuel E.Manuel <br /> Concentration <br /> Spiked: 3,300 Ng/kg 3,300 Ng/kg 3,300 Ng/kg 3,300 Ng/kg 3,300 Ng/kg <br /> LCS Batch#: BLK022598 BLK022598 BLK022598 BLK022598 BLK022598 <br /> Date Prepared: 02/25/98 02/25/98 02/25/98 02/25/98 02/25/98 <br /> Date Analyzed: 02/25/98 02/25/98 02/25/98 02/25/98 02/25/98 <br /> Instrument I.D.#: H5 H5 H5 H5 H5 <br /> LCS <br /> Recovery: 69 82 64 39 66 <br /> Control Limits: 31-137% 11-114% #VALUE! 17-109% 35-142% <br /> i <br /> MS/MSD BLK022598 BLK022598 BLK022598 BLK022598 BLK022598 <br /> Batch #: BS/BSD BS/BSD BS/BSD BS/BSD BS/BSD <br /> Date Prepared: 02/25/98 02/25/98 02/25/98 02/25/98 02/25/98 <br /> IDate Analyzed: 02/25/98 02/25/98 02/25/98 02/25/98 02/25/98 <br /> Instrument I.D.#: H5 H5 H5 H5 H5 <br /> Matrix Spike <br /> % Recovery: 69 82 64 39 66 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery: 62 70 59 34 62 <br /> Relative% <br /> Difference: 9.7 16 7.4 15 6.2 <br /> ISEQUOIA ANALYTICAL Please Note: <br /> 16-11 The LCS is a control sample of known,interferent free matrix that is analyzed using the same reagents, <br /> 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 /> nda C. Schneider and are not used to accept or reject batch results. <br /> 4 <br /> 'Project Manager/Sacramento Laboratory Page 2 of 2 <br /> /,/ Project <br /> � 8020578.KLF <23> <br />