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"i.A I <br />W010 <br />3164 Gold Camp Dr., Suite 240 <br />Rancho Cordova, CA 95670 <br />Attention: Greg Gurss <br />680 Chesapeake Drive Redwood City, CA 9 (415) 364-9600 FAX (415) 364-9233 <br />404 N. Wiget Lane Walnut Creek, CA 94598 (510) 988-9600 FAX (510) 988-9673 <br />819 Striker Avenue, Suite 8 Sacramento, CA 95834 (916) 921-9600 FAX (916) 921-0100 <br />osco - <br />Matrix: Soil <br />QC Sample Group 705-0337 <br />• • .• � .-t•_ <br />ANALYTE: 1,1-Dichloro- Chloro- <br />ethene Trichloroethene Benzene Toluene benzene <br />Reported: May 21, 1 <br />Method: <br />EPA 8240 <br />EPA 8240 <br />EPA 8240 <br />EPA 8240 <br />EPA 8240 <br />Analyst: <br />K. Pocan <br />K. Pocan <br />K. Pocan <br />K. Pocan <br />K. Pocan <br />Concentration <br />Spiked: <br />2500 ug/kg <br />2500 ug/kg <br />2500 ug/kg <br />2500 ug/kg <br />2500 ug/kg <br />LCS Batch#: <br />LCS052097 <br />LCS052097 <br />LCS052097 <br />LCS052097 <br />LCS052097 <br />Date Prepared: <br />05/20/97 <br />05/20/97 <br />05/20/97 <br />05/20/97 <br />05/20/97 <br />Date Analyzed: <br />05/20/97 <br />05/20/97 <br />05/20/97 <br />05/20/97 <br />05/20/97 <br />Instrument I.D.#: <br />MS -F1 <br />MS -F1 <br />MS -F1 <br />MS -F1 <br />MS -F1 <br />LCS % <br />Recovery: <br />126 <br />112 <br />117 <br />114 <br />115 <br />Control Limits: <br />65-135 <br />70-130 <br />70-130 <br />70-130 <br />70-130 <br />MS/MSD <br />Batch #: <br />BS052097 <br />BS052097 <br />BS052097 <br />BS052097 <br />BS052097 <br />Date Prepared: <br />05/20/97 <br />05/20/97 <br />05/20/97 <br />05/20/97 <br />05/20/97 <br />Date Analyzed: <br />05/20/97 <br />05/20/97 <br />05/20/97 <br />05/20/97 <br />05/20/97 <br />Instrument I.D.#: <br />MS -F1 <br />MS -F1 <br />MS -F1 <br />MS -F1 <br />MS -F1 <br />Matrix Spike <br />% Recovery: <br />126 <br />112 <br />117 <br />114 <br />115 <br />Matrix Spike <br />Duplicate % <br />Recovery: <br />121 <br />110 <br />112 <br />111 <br />124 <br />Relative % <br />Difference: <br />4.1 <br />1.8 <br />4.4 <br />2.7 <br />7.5 <br />Please Note: <br />The LCS is a control sample of known, interferent free matrix that is analyzed using the same reagents, <br />SEQUOIA ANALYTICAL 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 />�M)A, 14 , fPX4AA0 and are not used to accept or reject batch results. <br />Edana M. Fruciano <br />Project Manager/Sacramento Laboratory <br />7050337.GSI <13> <br />Ot <br />