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�fia. 5 <br /> Sequoia 80 Chesapeake Drive Redwood City,CA 94063 (415) 364'-9600 FAX(415) 364.9233 <br /> ."Y 1900 Bates Avenue,Suite L Concord,CA 94520 (510) 686,-9600 FAX(510)686-9689 <br /> 819 Striker Avenue,Suite 8 Sacramento, CA 95834 {915) 921''-9600 FAX(9l6)921.0100 <br /> Analytical <br /> Ghent Pro ect ID " 20-11 76-02 /TCH..... ... <br /> leis#elder l <br /> 2825 East Myrtle St. Matrix: Water <br /> Stockton, CA 95205 Reported: May 16, 1995 <br /> :.> <br /> Attention: Roman Rocca QC Sample Group 5050258 260 P y <br /> QUALITY CONTROL DATA REPORT <br /> L <br /> ANALYTE Ethyl- <br /> Benzene Toluene Benzene Xylenes Diesel <br /> Method: EPA so0 <br />� 2 EPA 8020 EPA 8020 EPA 8020, EPA 801 5M <br /> Analyst: C.Lee <br /> C.Lee C.Lee C.Lee C.Lee <br /> Concentration <br /> Spiked: 10 ug/L 10 ug/L 10 ug/L 30 ug/L 300 ug/L <br /> LCS Batch#: LCS051195 LCS051195 LCS051195 LCS051195 LC8051095 <br /> Date Prepared: 5/11/95 5/11/95 5/11/95 5/11/95 5/10/95 <br /> Date Analyzed: 5/11/95 5/11/95 5/11/95 5/11/95 5/11/95 <br /> f Instrument LD.#: GCHP-2 GCHP-2 . GCHP 2 GCHP 2 GCHP-3B <br /> E <br /> f LCS % <br /> i Recovery: 97 96 96 97 110 <br /> Control Limits: 75-125 75-125 75-125 75-125 60-130 <br /> MS/MSD <br /> jBatch#: 5050259 5050259 5050259 5050259 SS051095A <br /> Date Prepared: 5/11/95 5/11/95 5/11/95 5/11/95 5/10/95 <br /> I; L Date Analyzed: 5/11/95 5/11/95 5/11/95 5/11/95 5/11/95 <br /> f Instrument I.D.#: GCHP-2 GCHP-2 GCHP-2 GCHP-2 GCHP-3B <br /> i Matrix Spike <br />! % Recovery: 96 93 96 96 118 <br /> f <br /> Matrix Spike <br /> Duplicate% <br /> Recovery: 94 94 95 95 123 <br /> 1 Relative% <br /> Difference: 2.1 1.1 1.0 1.0 4.1 <br /> SEQUOIA ANALYTICAL Please Note: <br /> i 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 G`, validation of sample batch results. Due to matrix effects,the QC limits for MS/MSG's are advisory only <br /> F{/ Linda C. Schneider and are not used to acceptor reject batch results. <br /> Project Manager <br /> 5050258.KLF <3> <br /> f L <br />