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Sequoia 680 Chesapeake Drive Redwood City, CA 94063 (650) 364-9600 FAX <br /> 404 N.Wiget Lane Walnut Creek,CA 94598 (650)364-9233 <br /> 1 (510) 988-9600 FAX(510)988-9673 <br /> frilly Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921-9600 FAX(916)921-0100 <br /> Kleirifelder <br /> .> <br /> Client Project ID: 2o-4084-01. <br /> ix <br /> 2825 East Myrtle St. Matrix: Soil/Water <br /> Stockton, CA 95205 <br /> Attention: Tony Martin <br /> QC Sample Grou 8020578-0580 Re • <br /> _ ported Mar 12 1998 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE 1,4-Dichloro- N-Nitroso-Di- 1,2,4-Trichloro- 4-Chloro-3- <br /> Phenol 2-Chlorophenol benzene N-propylamine benzene Meth I hen I <br /> Method: EPA 8270 EPA 8270 EPA 8270 EPA 8270 EPA 8270 EPA 8270 <br /> Analyst: E.Manuel E. Manuel E.Manuel E.Manuel E. Manuel E.Manuel <br /> Concentration <br /> Spiked: 200 pg/L 200 Ng/L 200Ng/L 200 Ng/L 200 Ng/L 200 Ng/L <br /> LCS Batch#: W80225BS WB0225BS WBO225BS WB0225BS WB0225BS WB0225BS <br /> Date Prepared: 02/25/98 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 02/25/98 <br /> Instrument I.D.#: H5 H5 H5 H5 H5 H5 <br /> LCS % <br /> Recovery: 37 64 58 61 78 78 <br /> Control Limits: 12-110% 27-123% 36-97% 41-116% 39-98% 23-97% <br /> ............................:.::::.:::::::::,::: <br /> MS/MSD <br /> Batch#: 9802A27-03 9802A27-03 9802A27-03 9802A27-03 9802A27-03 9802A27-03 <br /> Date Prepared: 02/25/98 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 02/25/98 <br /> Instrument I.D.#: H5 H5 H5 H5 H5 H5 <br /> Matrix Spike <br /> % Recovery: 34 78 58 88 69 89 <br /> Matrix Spike <br /> Duplicate % <br /> Recovery: 35 80 68 90 76 86 <br /> Relative% <br /> Difference: 2.9 3.2 15 2.2 9.7 3.4 <br /> Please Note: <br /> SEQUOIA ANALYTICAL 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 QC limits for MS/MSD's are advisory only <br /> and are not used to accept or reject batch results. <br /> inda C. Schneider <br /> Project Manager/Sacramento Laboratory Page 1 of 2 <br /> 8020578.KLF <20> <br />