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Sequoia <br /> 680 Chesapeake Drive Redwood City,CA 94063 (415) 364.9600 FAX(415) 364-9233 <br /> ,goo Batts Avenue,Suite L Concord,CA 94520 (510) 686-9600 FAX(510)686-9689 <br /> Analytical $19 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) .925.9600 FAX(916)921-0 100 <br /> ............. <br /> ................066�81vd., Stockton, CA <br /> nc. -Project 10: -"8.h <br /> ...................Clk'�f ell, 2575 ountry .. <br /> ugro West, ie <br /> 1050 Melody Lane, Ste. 160 Matrix: Soil <br /> X <br /> Roseville, CA 95678 <br /> Attention: Sudhakar Talanki QC Sample Group 5050998-1014 Reported: May 31, 1995 <br /> .. ........ <br /> ......... <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Ethyl- <br /> Benzene Toluene Benzene Xylenes <br /> Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Analyst: C.Lee C.Lee C. Lee C.Lee <br /> Concentration <br /> Spiked: 0.20 mg/kg 0.20 mg/kg 0.20 mg/kg 0.60 mg/kg <br /> LCS Batch#: LC8052695 LCS052695 LCS052695 LCS052695 <br /> Date Prepared: 5/26/95 5/26/95 5/26/95 5/26/95 <br /> Date Analyzed: 5/26/95 5/26/95 5/26/95 5/26/95 <br /> Instrument I.D.#: GCHP-1 GCHP-11 GCHP-11 GGHP-1 <br /> LCS % <br /> Recovery: 94 95 96 95 <br /> Control Limits: 75-125 75-125 75-125 75-125 <br /> ............... <br /> ... . ........... ..... ....... ... ....... <br /> ......... ... .. ..... <br /> ... ........ ....... ....... <br /> .. ............ ....... <br /> ........... .. <br /> ...... ...... <br /> ........... <br /> .......... <br /> I ......... ..... <br /> . . .... . ...... ............ ........ ..... . . .. <br /> ............. .............. . <br /> .. .......... .. ... ....... ....... ........... <br /> ............. .r__...... ....... ........... <br /> ........... <br /> r.,....... ..—....... <br /> MS/MSD <br /> Batch#: 5051099 5051099 5051099 5051099 <br /> Date Prepared: 5/26/95 5/26/95 5/26/95 5/26/95 <br /> Date Analyzed: 5/26/95 5/26/95 5/25/95 5/26/95 <br /> Instrument I.D.#: GCHP-1 GCHP-1 GCHP-1 GGHP-1 <br /> Matrix Spike <br /> % Recovery: 92 92 94 94 <br /> Matrix Spike <br /> Duplicate % <br /> Recovery: 92 93 94 94 <br /> Relative % <br /> Difference, 0.0 0.0 0.0 0.0 <br /> ',EQUOIA ANALYTICAL Please Note: <br /> The LCS is a control sample of known,interferent free matrix that is analyzed using the same reagents, <br /> e6v 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/ SD are advisoryonly <br /> Linda C. Schneider and are not used to accept or reject batch results. <br /> Project Manager <br /> roject Manager <br /> 5050998.FUG <6> <br />