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Sequoia <br />080 Chesapeake Drive <br />Redwood City, CA 9406415) 364-9600 <br />FAX (415) 364-9233 <br />Analytical <br />404 N. Wiget Lane <br />819 Striker Avenue, Suite 8 <br />Walnut Creek, CA 94598 (510) 988-9600 <br />Sacramento, CA 95834 (916) 921-9600 <br />FAX (510) 988-9673 <br />FAX (916) 921-0100 <br />3164 Gold Camp Dr., Suite 200 Matrix: Soil <br />Rancho Cordova, CA 95670 <br />Attention: Eric Holm QC Sample Group: 5080401-403 Reported: Aug 15, 1 <br />QUALITY CONTROL DATA REPORT <br />ANALYTE <br />Cadmium Chromium Lead Nickel Zinc Diesel <br />Method: <br />EPA6010 <br />Analyst: <br />K. Barta <br />Concentration <br />8/11/95 <br />Spiked: <br />50 mg/kg <br />LCS Batch#: <br />LCS081195 <br />Date Prepared: <br />8/11/95 <br />Date Analyzed: <br />8/14/95 <br />Instrument I.D.#: <br />P-40 <br />LCS % <br />LCS081195 <br />Recovery: <br />98 <br />Control Limits: <br />80-120 <br />MS/MSD <br />EPA 6010 <br />Batch #: <br />5080402 <br />Date Prepared: <br />8/11/95 <br />Date Analyzed: <br />8/14/95 <br />Instrument I.D.#: <br />P-40 <br />Matrix Spike <br />50 mg/kg <br />% Recovery: <br />90 <br />Matrix Spike <br />LCS081195 <br />Duplicate % <br />LCS081195 <br />Recovery: <br />94 <br />Relative % <br />8/11/95 <br />Difference: <br />4.3 <br />SEQUOIA ANALYTICAL <br />Linda C. Schneider <br />Project Manager <br />EPA 6010 <br />EPA 6010 <br />EPA 6010 <br />EPA 6010 <br />EPA 8015M <br />K. Barta <br />K. Barta <br />K. Barta <br />K. Barta <br />C. Lee <br />50 mg/kg <br />50 mg/kg <br />50 mg/kg <br />50 mg/kg <br />7.5 mg/kg <br />LCS081195 <br />LCS081195 <br />LCS081195 <br />LCS081195 <br />LCS081195A <br />8/11/95 <br />8/11/95 <br />8/11/95 <br />8/11/95 <br />8/11/95 <br />8/14/95 <br />8/14/95 <br />8/14/95 <br />8/14/95 <br />8/17/95 <br />P-40 <br />P-40 <br />P-40 <br />P-40 <br />GCHP-3B <br />99 98 104 102 103 <br />80-120 80-120 80-120 80-120 60-130 <br />5080402 <br />5080402 <br />5080402 <br />5080402 <br />5070935 <br />8/11/95 <br />8/11/95 <br />8/11/95 <br />8/11/95 <br />7/27/95 <br />8/14/95 <br />8/14/95 <br />8/14/95 <br />8/14/95 <br />8/11/95 <br />P-40 <br />P-40 <br />P-40 <br />P-40 <br />GCHP-36 <br />78 <br />90 <br />84 <br />76 <br />80 <br />92 <br />80 <br />92 <br />2.5 <br />2.2 <br />4.8 <br />19 <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. *Matrix interference. <br />5080401.DLT <8> <br />