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Sequoia <br />10680 Chesapeake Drive <br />Redwood City, CA 9406(415) 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 />Delta Env ronmental"'Cons::>:I4fit ........ "'Tient Pr.....;6ct::I>D::....:> n:::>::::>::>::::::>::>::::>:::>::::>:......::>:......::::::............:.........>.....:....: :» :>::»::>::::::::::>::>::>:::<:«::>::»>::»::::>::>::::>::::>::::»::>::> <br />u a s C o)e U oca #5886 <br />3164 Gold Camp Dr., Suite 200 Matrix: Soil <br />Rancho Cordova, CA 95670 <br />Attention: Eric Holm QC Sample Group 5080010-11 Reported: Aug 15, 199E <br />....................................................................................................................................................................................................................................................................................... . <br />...................................................................................................................................................................................................................................................................................... . <br />....................................................................................................................................................................................................................................................................................... . <br />...................................................................................................................................................................................................................................................................................... . <br />....................................................................................................................................................................................................................................................................................... . <br />................................................................................2:......................................................................................................................... --- -.................................................................... . <br />QUALITY CONTROL DATA REPORT <br />ANALYTE Chloro- <br />1,1-Dichloroethene Trichloroethene benzene Oil & Grease <br />Method: <br />EPA 8010 <br />EPA 8010 <br />EPA 8010 <br />SM 5520 EF <br />Analyst: <br />K. Pocan <br />K. Pocan <br />K. Pocan <br />V. Owens <br />Concentration <br />Spiked: <br />10 ug/L <br />10 ug/L <br />10 ug/L <br />50 mg/kg <br />LCS Batch#: <br />LCS081095 <br />LCS081095 <br />LCS081095 <br />LCS081195 <br />Date Prepared: <br />8/10/95 <br />8/10/95 <br />8/10/95 <br />8/11/95 <br />Date Analyzed: <br />8/10/95 <br />8/10/95 <br />8/10/95 <br />8/14/95 <br />Instrument I.D.#: <br />GCHP-5 <br />GCHP-5 <br />GCHP-5 <br />N/A <br />LCS % <br />Recovery: <br />79 <br />90 <br />124 <br />81 <br />Control Limits: <br />70-130 <br />70-130 <br />70-130 <br />80-120 <br />MS/MSD <br />Batch #: <br />5080151 <br />5080151 <br />5080151 <br />5080173 <br />Date Prepared: <br />8/10/95 <br />8/10/95 <br />8/10/95 <br />8/11/95 <br />Date Analyzed: <br />8/10/95 <br />8/10/95 <br />8/10/95 <br />8/14/95 <br />Instrument I.D.#: <br />GCHP-5 <br />GCHP-5 <br />GCHP-5 <br />N/A <br />Matrix Spike <br />% Recovery: <br />75 <br />82 <br />61 <br />84 <br />Matrix Spike <br />Duplicate % <br />Recovery: <br />65 <br />76 <br />60 <br />88 <br />Relative % <br />Difference: <br />14 <br />7.6 <br />1.2 <br />4.6 <br />SEQUOIA ANALYTICAL <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 />5080010,DLT <8> <br />