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41) Sequoia <br />wo Analytical <br />3164 Gold Camp Dr., Suite 200 <br />Rancho Cordova, CA 95670 <br />Attention: Eric Holm <br />+680 Chesapeake Drive Redwood City, CA 94060415) 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 />Matrix: Soil <br />QC Sample Group: 507-1403 <br />QUALITY CONTROL DATA REPORT <br />ANALYTE <br />Cadmium Chromium Lead Nickel Zinc <br />Reported: Aug 10, 1 <br />Method: <br />EPA 6010 <br />EPA 6010 <br />EPA 6010 <br />EPA 6010 <br />EPA 6010 <br />Analyst: <br />K. Barta <br />K. Berta <br />K. Barta <br />K. Barta <br />K. Berta <br />Concentration <br />Spiked: <br />50 mg/kg <br />50 mg/kg <br />50 mg/kg <br />50 mg/kg <br />50 mg/kg <br />LCS Batch#: <br />LCS073195 <br />LCS073195 <br />LCS073195 <br />LCS073195 <br />LCS073195 <br />Date Prepared: <br />7/31/95 <br />7/31/95 <br />7/31/95 <br />7/31/95 <br />7/31/95 <br />Date Analyzed: <br />8/11/95 <br />8/11/95 <br />8/11/95 <br />8/11/95 <br />8/11/95 <br />Instrument I.D.#: <br />MTJA-2 <br />MTJA-2 <br />MTJA-2 <br />MTJA-2 <br />MTJA-2 <br />LCS % <br />Recovery: <br />100 <br />95 <br />100 <br />95 <br />99 <br />Control Limits: <br />80-120 <br />80-120 <br />80-120 <br />80-120 <br />80-120 <br />xxx <br />MS/MSD <br />Batch #: <br />5071403 <br />5071403 <br />5071403 <br />5071403 <br />5071403 <br />Date Prepared: <br />7/31/95 <br />7/31/95 <br />7/31/95 <br />7/31/95 <br />7/31/95 <br />Date Analyzed: <br />8/11/95 <br />8/11/95 <br />8/11/95 <br />8/11/95 <br />8/11/95 <br />Instrument I.D.#: <br />MTJA-2 <br />MTJA-2 <br />MTJA-2 <br />MTJA-2 <br />MTJA-2 <br />Matrix Spike <br />% Recovery: <br />92 <br />96 <br />91 <br />88 <br />90 <br />Matrix Spike <br />Duplicate % <br />Recovery: <br />88 <br />94 <br />89 <br />84 <br />86 <br />Relative % <br />Difference: <br />4.4 <br />2.1 <br />2.2 <br />4.6 <br />4.5 <br />SE91.110IA ANALYTICAL / <br />i <br />Linda C. Schneider <br />Project Manager <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 />5071403.DLT <10> <br />