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Ch� <br /> Sequoia 80 esapeake 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 /> t �ill7 Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921-9600 FAX(916)921.0100 <br /> Kleirifelder <br /> Client Project ID. 20-4054-01 <br /> 2825 East Myrtle St. Matrix. Soil/Water <br /> Stockton, CA 95205 <br /> <> <br /> Attention: <br /> Ton <br /> Martin n QC Sample Grou 8020578-0580 <br /> >;: Reported:l <br /> p d Mar 12 1998.. <br /> QUALITY CONTROL DATA REPORT <br /> I ANALYTE 2,4-Dinitro- Penta- <br /> Acenaphthene- <br /> enta- <br /> Acena hthene 4-Nitrophenol toluene chloro henol 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: 200 Ng/L 200 Ng/L 200Ng/L 200 Ng/L 200Ng/L <br /> LCS Batch#: WB0225BS WB02256S WB0225BS WB0225BS WB0225BS <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: 71 48 81 74 97 <br /> Control Limits: 46-118% 10-80% 24-96% 9-103% 26-127% <br /> MS/MSD <br /> Batch#: 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 <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 /> Matrix Spike <br /> % Recovery: 77 25 80 61 70 <br /> Matrix Spike <br /> Duplicate % <br /> Recovery: 79 26 85 65 71 <br /> Relative% <br /> Difference: 2.6 4.0 6.1 6.4 2.1 <br /> SEQUOIA ANALYTICAL Please Note: <br /> 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 /> /�L� validation of sample batch results. Due to matrix effects,the QC limits for MS/MSD's are advisory only <br /> Lida C. Schneider and are not used to accept or reject batch results. <br /> Project Manager/Sacramento Laboratory Page 2 of 2 <br /> I8020578.KLF <21> <br />