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�Y <br /> Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364.9600 FAX(415) 364-9233 <br /> 404 N.Wiser 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 /> Klelnlelder Client Project Ib:' 20978-01.W35/Spreckels <br /> r< <br /> '2825 East Myrtle St. Matrix: Soil/Water <br /> Stockton, CA 95205 <br /> Attention: Tony Martin QC Sample Group 7090549-0559 Reported: Sep 18, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE 2,4-Dinitro- Penta- <br /> Aoena hthene 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: 200 Ng/L 200vg/L 200Ng/L 20ogg/L 200 pg/L <br /> LCS Batch#: LCS091597 LCS091597 LCS091597 LCS091597 LCS091597 <br /> Date Prepared: 09/15/97 09/15/97 09/15/97 09/15/97 09/15/97 <br /> Date Analyzed: 09/16/97 09/16/97 09/16/97 09/16/97 09/16/97 <br /> Instrument I.D.#: F4 F4 F4 F4 F4 <br /> LCS % <br /> Recovery: 70 17 72 73 69 <br /> Control Limits: 46-118 10-80 24-96 9-103 26-127 <br /> MS/MSD <br /> Batch #: BS091597 BS091597 BS091597 BS091597 BS091597 <br /> Date Prepared: 09/15/97 09/15/97 09/15/97 09/15/97 09/15/97 <br /> Date Analyzed: 09/16/97 09/16/97 09/16/97 09/16/97 09/16/97 <br /> Instrument I.D.#: F4 F4 F4 F4 F4 <br /> Matrix Spike <br /> %Recovery: 70 17 72 73 69 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery: 74 25 74 79 70 <br /> Relative% <br /> Difference: 4.9 38 2.1 7.9 0.70 <br /> cF OIA ANALYT CAL 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 /> Linda C. Se Heider and are not used to accept or reject batch results. <br /> Project Manager/Sacramento Labora ory Page 2 of 2 <br /> 7090550.KLF <21> <br /> m <br />