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ueo6trategies Inc. <br />3164 Gold Camp Dr., Suite 240 <br />Rancho Cordova, CA 95670 <br />Attention: Greg Gurss <br />is 680 Chesapeake Drive Redwood City, CA 940 (415) 364-9600 FAX (415) 364-9233 <br />404 N. Wiget Lane Walnut Creek, CA 9459 (510) 988-9600 FAX (510) 988-9673 <br />819 Striker Avenue, Suite 8 Sacramento, CA 95834 (916) 921-9600 FAX (916) 921-0100 <br />laleni rrojeci IU: uINUUAL, I Osco - bt- <br />Matrix: Soil <br />QC Sample Group 705-0337 <br />Reported: May 21, 1 <br />ANALYTE Ethyl - <br />Benzene Toluene Benzene X lenes Diesel O&G <br />Method: <br />EPA 8020 <br />EPA 8020 <br />EPA 8020 <br />EPA 8020 <br />DHS LLIFT <br />EPA 5520 EF <br />Analyst: <br />C. Lee <br />C. Lee <br />C. Lee <br />C. Lee <br />C. Lee <br />SP/LM <br />Concentration <br />Spiked: <br />0.20 mg/kg <br />0.20 mg/kg <br />0.20 mg/kg <br />0.60 mg/kg <br />7.5 mg/kg <br />500mg/kg <br />LCS Batch#: <br />LCS051597 <br />LCS051597 <br />LCS051597 <br />LCS051597 <br />LCS051997 <br />LCS051997 <br />Date Prepared: <br />05/15/97 <br />05/15/97 <br />05/15/97 <br />05/15/97 <br />05/19/97 <br />05/19/97 <br />Date Analyzed: <br />05/15/97 <br />05/15/97 <br />05/15/97 <br />05/15/97 <br />05/19/97 <br />05/19/97 <br />Instrument I.D.#: <br />GCHP-1 <br />GCHP-1 <br />GCHP-1 <br />GCHP-1 <br />GCHP-3B <br />BAL-4 <br />LCS % <br />Recovery: <br />100 <br />101 <br />105 <br />104 <br />96 <br />86 <br />Control Limits: <br />70-130 <br />70-130 <br />70-130 <br />70-130 <br />60-140 <br />70-130 <br />MS/MSD <br />Batch #: <br />70500287 <br />70500287 <br />70500287 <br />70500287 <br />7050336 <br />7050334 <br />Date Prepared: <br />05/15/97 <br />05/15/97 <br />05/15/97 <br />05/15/97 <br />05/19/97 <br />05/19/97 <br />Date Analyzed: <br />05/15/97 <br />05/15/97 <br />05/15/97 <br />05/15/97 <br />05/19/97 <br />05/19/97 <br />Instrument I.D.#: <br />GCHP-1 <br />GCHP-1 <br />GCHP-1 <br />GCHP-1 <br />GCHP-313 <br />BAL-4 <br />Matrix Spike <br />% Recovery: <br />102 <br />103 <br />106 <br />106 <br />101 <br />71 <br />Matrix Spike <br />Duplicate % <br />Recovery: <br />100 <br />102 <br />105 <br />105 <br />103 <br />73 <br />Relative % <br />Difference: <br />2.0 <br />0.98 <br />0.95 <br />0.95 <br />2.0 <br />2.8 <br />SEQUOIA ANALYTICAL <br />eVAKW M . AAs to <br />Edana M. Fruciano <br />Project Manager/Sacramento Labc <br />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 />and are not used to accept or reject batch results. <br />raiory <br />7050337.GSI <9> <br />