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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (415) 364-9600 FAX(415) 364-9233 <br /> 404 N.Wiget Lane Walnut Creck,CA 94598 (510) 988.96W FAX(5 10)988-9673 <br /> Analytical 119 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921-9600 FAX(916)921-0100 <br /> ............ ...... ....................... <br /> Kleinfeld <br /> .......... <br /> er CilentProject I 20-3978-01.W,3-5 <br /> 2825 East Myrtle St. Matrix: Soil/Water <br /> Stockton, CA 95205 <br /> Attention: Tony Martin QC Sample Group 7090412-0431 Reported: Sep 18, 1997" <br /> M <br /> NWa <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Ethyl- <br /> Benzene Toluene Benzene Xylenes Diesel Diesel <br /> Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 DHS LUIFT DHS LUFT <br /> Analyst: C.Lee C.Lee C.Lee C.Lee G.Lee C.Lee <br /> Concentration <br /> Spiked: 0.20 mg/kg 0.20 mg/kg 0.20 mg/kg 0.60 mg/kg 7.5 mg/kg 500 mg/L <br /> LCS Batch#: LCS091197 LCS091197 LCS091197 LCS091197 LCS091097 LCS090997 <br /> Date Prepared: 09/11/97 09/11/97 09/11/97 09/11/97 09/10/97 09/09/97 <br /> Date Analyzed: 09/11/97 09/11/97 09/11/97 09/11/97 09/12/97 09/16/97 <br /> Instrument I.D.#: GCHP-2 GCHP-2 GCHP-2 GCHP-2 GCHP3B GCHP3B <br /> LCS % <br /> Recovery: 108 100 99 95 81 64 <br /> Control Limits: 70-130 70-130 70-130 70-130 60.140 60-140 <br /> .............4. ....... <br /> ......... <br /> ... ..... . <br /> K <br /> MS/MSD <br /> Batch#: 7090505 7090505 7090505 7090505 7090421 BS090997 <br /> Date Prepared: 09/11/97 09/11/97 09/11/97 09/11/97 09/10/97 09/09/97 <br /> Date Analyzed: 09/11/97 09/11/97 09/11/97 09/11/97 09/12/97 09/16/97 <br /> Instrument I.D.#: GCHP-2 GCHP-2 GCHP-2 GCHP-2 GCHP3B GCHP4B <br /> Matrix Spike <br /> %Recovery: 108 101 100 95 75 64 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery: 100 96 96 92 78 62 <br /> Relative% <br /> Difference: 7.7 5.1 4.1 3.2 3.9 3.2 <br /> YT <br /> /qEQ CIA ANALYTIC <br /> IC 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 OC limits for MS/MSD's are advisory only <br /> inda C. Schn ider and are not used to accept or reject batch results. <br /> Project <br /> roject Manager/Sacramento Labor—aFoRV- <br /> 7090413.KLF <9> <br />