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Sequoia Chesapeake Drive Redwood City CA 94063 go 5) 364-9600 FAX(415) 364-9233 <br /> 404 N.Wiget Lane Walnut Creek,CA 94599 (510) 988.9600 FAX(510)988.%73 <br /> %70,!D— Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921-9600 FAX(916)921-0100 <br /> einf6 der'* 6 8preck es <br /> Client Project 1 20-3978-01 <br /> 2825 East Myrtle St. Matrix: Soil <br /> Stockton, CA 95205 <br /> : , <br /> Rep Jan 2719971 <br /> Attention: Tony Martin QC Sample Group 7010355-62 Reported <br /> I.X <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE 2,4-Dinitro- Parts- <br /> Acenaphthene 4-Nitrophenol toluene chlorophenol PVrene <br /> Method: EPA 8270 EPA 8270 EPA 8270 EPA 8270 EPA 8270 <br /> Analyst: E. Pitamah B.Pitamah B.Pitamah B.Pitamah E.Pitamah <br /> Concentration <br /> Spiked: 3300 ug/kg 3300 ug/kg 3300 ug/kg 3300 ug/kg 3300 ug/kg <br /> LCS Batch#: LCS01 1597 LCS01 1597 LCS01 1597 LCS01 1597 LCS01 1597 <br /> Date Prepared: 01/15/97 01/15/97 01/15/97 01/15/97 01/15/97 <br /> Date Analyzed: 01/20/97 01/20/97 01/20/97 01/20/97 01/20/97 <br /> Instrument I.D.#: F4 F4 F4 F4 F4 <br /> LCS % <br /> Recovery: 64 75 75 74 71 <br /> Control Limits: 31-137 11-114 28-89 17-109 35-142 <br /> MS/MSD <br /> Batch#: 9701679-02 9701679-02 9701679-02 9701679-02 9701679-02 <br /> Date Prepared: 01/15/97 01/15/97 01/15/97 01/15/97 01/15/97 <br /> Date Analyzed: 01/21/97 01/20/97 01/20/97 01/20/97 01/20/97 <br /> Instrument I.D.#: F4 F4 F4 F4 F4 <br /> Matrix Spike <br /> % Recovery: 64 57 63 54 62 <br /> Matrix Spike <br /> Duplicate % <br /> Recovery: 68 57 62 56 64 <br /> Relative% <br /> Difference: 6.5 0.0 2.4 3.9 3.9 <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 advisory only <br /> Edana M. Belschner and are not used to accept or reject batch results. <br /> Project Manager/Sacramento Laboratory Page 2 of 2 7010362.KLF <7> <br />