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Sequoia <br />11) <br />EPA 8270 <br />680 Chesapeake Drive <br />Redwood City, CA 94060 <br />(415) 364-9600 <br />FAX (415) 364-9233 <br />Analyst: <br />B. Pitamah <br />404 N. Wiget Lane <br />Walnut Creek, CA 94598 <br />(510) 988-9600 <br />FAX (510) 988-9673 <br />VQF Analytical <br />819 Striker Avenue, Suite 8 <br />Sacramento, CA 95834 <br />(916) 921-9600 <br />FAX (916) 921-0100 <br />Delta Environmental Consultants Client project lu: unocal #but3b <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, 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 />B. Pitamah <br />B. Pitamah <br />B. Pitamah <br />B. Pitamah <br />B. Pitamah <br />Concentration <br />Spiked: <br />3300 ug/kg <br />3300 ug/kg <br />3300 ug/kg <br />3300 ug/kg <br />3300 ug/kg <br />LCS Batch#: <br />LCS081095 <br />LCS081095 <br />LCS081095 <br />LCS081095 <br />LCS081095 <br />Date Prepared: <br />8/10/95 <br />8/10/95 <br />8/10/95 <br />8/10/95 <br />8/10/95 <br />Date Analyzed: <br />8/10/95 <br />8/10/95 <br />8/10/95 <br />8/10/95 <br />8/10/95 <br />Instrument I.D.#: <br />GCHP-5 <br />GCHP-5 <br />GCHP-5 <br />GCHP-5 <br />GCHP-5 <br />LCS % <br />Recovery: <br />67 <br />61 <br />67 <br />61 <br />67 <br />Control Limits: <br />47-145 <br />RL -132 <br />39-139 <br />14-176 <br />52-115 <br />MS/MSD <br />Batch #: <br />9507F92-03 <br />9507F92-03 <br />9507F92-03 <br />9507F92-03 <br />9507F92-03 <br />Date Prepared: <br />8/8/95 <br />8/8/95 <br />8/8/95 <br />8/8/95 <br />8/8/95 <br />Date Analyzed: <br />8/9/95 <br />8/9/95 <br />8/9/95 <br />8/9/95 <br />8/9/95 <br />Instrument I.D.#: <br />F4 <br />F4 <br />F4 <br />F4 <br />F4 <br />Matrix Spike <br />% Recovery: <br />13 <br />9.1 <br />5.5 <br />16 <br />16 <br />Matrix Spike <br />Duplicate % <br />Recovery: <br />82 <br />79 <br />42 <br />79 <br />45 <br />Relative % <br />Difference: <br />145 <br />159 <br />154 <br />131 <br />96 <br />SEQUOIA ANALYTICAL <br />4Linda <br />C. Schneider <br />ct 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 />r <br />5080010.DLT <10> <br />