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(i) Sequoia <br />080 Chesapeake Drive <br />Redwood City, CA 940630415) 364-9600 <br />FAX (415) 364-9233 <br />VQF 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 24-Dinitro- Penta - <br />Acenaphthene 4-Nitrophenol toluene chlorophenol Pyrene <br />Method: <br />EPA 8270 <br />EPA 8270 <br />EPA 8270 <br />EPA 8270 <br />EPA 8270 <br />Analyst: <br />S. Le <br />S, Le <br />S. Le <br />S. Le <br />S. Le <br />Concentration <br />Spiked: <br />2500 ug/kg <br />5000 ug/kg <br />2500 ug/kg <br />5000 ug/kg <br />2500 ug/kg <br />LCS Batch#: <br />LCS081195 <br />LCS081195 <br />LCS081195 <br />LCS081195 <br />LCS081195 <br />Date Prepared: <br />8/11/95 <br />8/11/95 <br />8/11/95 <br />8/11/95 <br />8/11/95 <br />Date Analyzed: <br />8/14/95 <br />8/14/95 <br />8/14/95 <br />8/14/95 <br />8/14/95 <br />Instrument I.D.#: <br />GC/MS 1 <br />GC/MS 1 <br />GC/MS 1 <br />GC/MS 1 <br />GC/MS 1 <br />LCS % <br />Recovery: <br />82 <br />70 <br />68 <br />63 <br />102 <br />Control Limits: <br />47-146 <br />RL -132 <br />39-139 <br />14-176 <br />52-115 <br />MS/MSD <br />Batch #: <br />5080670 <br />5080670 <br />5080670 <br />5080670 <br />5080670 <br />Date Prepared: <br />8/11/95 <br />8/11/95 <br />8/11/95 <br />8/11/95 <br />8/11/95 <br />Date Analyzed: <br />8/14/95 <br />8/14/95 <br />8/14/95 <br />8/14/95 <br />8/14/95 <br />Instrument I.D.#: <br />GC/MS 1 <br />GC/MS 1 <br />GC/MS 1 <br />GC/MS 1 <br />GC/MS 1 <br />Matrix Spike <br />% Recovery: <br />72 <br />39 <br />62 <br />70 <br />72 <br />Matrix Spike <br />Duplicate % <br />Recovery: <br />80 <br />50 <br />70 <br />77 <br />82 <br />Relative % <br />Difference: <br />11 <br />25 <br />12 <br />9.5 <br />13 <br />SEQUOIA ANALYTICAL <br />/ <br />y <br />�CrCf C �� <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 />Page 2 of 2 <br />5080401.DLT <10> <br />