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-j <br /> LSequoia 680 Chesapeake Drive Redwood City,CA 940V (415) 364-9600 FAX(415) 364-9233 <br /> Ia- ) 404 N.Wiget Lane Walnut Creek, CA 94598 (510) 988-9600 FAX(510)998-9673 <br /> Lwo Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95814 (916) 921-9600 FAX(916)921-0 100 <br /> Kleinfelder ient Project ID: 20-3937-01 <br /> 2825 East Myrtle St. Matrix. o Soil <br /> Stockton, CA 95205 <br /> :,..Attention: Tony Martin QC Sample Group 60712 15, 17, 20, 23, 26-27 Reported: Aug 8, 1996'. <br /> ..................... ............. <br /> ............ <br /> I <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Ethyl- <br /> Benzene <br /> thyl- <br /> Benzene Toluene Benzene Xylenes Diesel Sulfate <br /> Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPAS015M EPA 375.4 <br /> Analyst: C.Lee C.Lee C. Lee C.Lee C. Lee S.Phillips <br /> Concentration <br /> Spiked: 0,20 mg/kg 0.20 mg/kg 0.20 mg/kg 0.60 mg/kg 7.5 mg/kg 1000 mg/kg <br /> LLCS Batch#: LCS072996 LCS072996 LCS072996 I-CS072996 LCS080196 LCS080296 <br /> LDate Prepared: 07/29/96 07/29/96 07/29/96 07/29/96 08/01/96 08/02/96 <br /> Date Analyzed: 07/29/96 07/29/96 07/29/96 07/29/96 08/01/96 08/02/96 <br /> Instrument I.D.#: GCHP-1 GCHP-1 GCHP-1 GCHP-1 GCHP-38 T-1 <br /> LCS % <br /> L Recovery: 88 90 92 93 95 103 <br /> Control Limits: 75-125 75-125 75-125 75-125 60-130 80-120 <br /> .......... ......... ........ ... <br /> ............- ...... <br /> .......... ............... <br /> -:X <br /> ............... <br /> X: <br /> MS/MSD <br /> L Batch #: 6071196 6071196 6071196 6071196 6071240 6071234 <br /> LDate Prepared: 07/29/96 07/29/96 07/29/96 07/29/96 08/01/96 08/02/96 <br /> Date Analyzed: 07/29/96 07/29/96 07/29/96 07/29/96 - 08/02/96 08/02/96 <br /> Instrument J.D.#: GCHP-1 GCHP-1 GCHP-1 GCHP-1 GCHP-3B T-1 <br /> Matrix Spike <br /> % Recovery: 78 82 81 84 100 96 <br /> Matrix Spike <br /> Duplicate % <br /> L Recovery: 70 73 76 75 107 99 <br /> Relative% <br /> L Difference: 11 12 6.4 11 6.8 3.1 <br /> LSEQUOIA ANALYTICAL Please Note: <br /> The LCS is a control sample of known,interferent free matrix that is analyzed using the same reagents, <br /> /y/ 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/MSOs are advisory only <br /> Linda C. Schneider and are not used to accept or reject batch results. <br /> Vtp:roject Manager/Sacramento Laboratory <br /> L6071215.KLF <22> <br />