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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 /> ■ �II� Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921-9600 FAX(916)921-0100 <br /> Klelnfelder 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 8030426-0428, 0430 Reported: Mar 26, 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: B.Pitamah B. Pitamah B. Pitamah B.Pitamah B.Pitamah <br /> Concentration <br /> Spiked: 200 Ng/L 200 Ng/L 200 Ng/L 200 pg/L 200 Ng/L <br /> LCS Batch#: BLK031198 BLK031198 BLK031198 BLK031198 BLK031198 <br /> BS/BSD BS/BSD BS/BSD BS/BSD BS/BSD <br /> Date Prepared: 03/16/98 03/16/98 03/16/98 03/16/98 03/16/98 <br /> Date Analyzed: 03/17/98 03/17/98 03/17/98 03/17/98 03/17/98 <br /> Instrument I.D.#: H5 H5 H5 H5 H5 <br /> LCS <br /> Recovery: 69 46 74 67 70 <br /> Control Limits: 46-118% 10-80% 24-96% 9-103% 26-127% <br /> ............................................................................................................................................ <br /> MS/MSD <br /> Batch #: WB0316BS WB0316BS WB03166S WB0316BS WB0316BS <br /> Date Prepared: 03/11/98 03/16/98 03/16/98 03/16/98 03/16/98 <br /> Date Analyzed: 03/11/98 03/17/98 03/17/98 03/17/98 03/17/98 <br /> Instrument I.D.#: H5 H5 H5 H5 H5 <br /> ' Matrix Spike <br /> % Recovery: 65 25 62 54 81 <br /> Matrix Spike <br /> ' Duplicate% <br /> Recovery: 79 27 75 61 83 <br /> Relative% <br /> Difference: 20 7.7 19 12 2.5 <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 /> validation of sample batch results. Due to matrix effects,the QC limits for MS MSD's are adviso only <br /> Inda C. Sc neider and are not used to accept or reject batch results. <br /> Project Manager/Sacramento Laboratory Page 2 of 2 <br /> 8030426.KLF <28> <br />