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41) Sequoia <br />0680 Chesapeake Drive <br />Redwood City, CA 9406(415) 364.9600 <br />FAX (415) 364-9233 <br />woAnalytical <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 5080010-11 Reported: Aug 15, 1 <br />QUALITY CONTROL DATA REPORT <br />ANALYTE 1,4-Dichloro- N -Nitroso -Di- 1,2,4-Trichloro- 4 -Chloro -3 - <br />Phenol 2 -Chlorophenol benzene N-propylamine benzene Methylphenyl <br />Method: <br />EPA 8270 <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 />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 />3300 ug/kg <br />LCS Batch#: <br />LCS080895 <br />LCS080895 <br />LCS080895 <br />LCS080895 <br />LCS080895 <br />LCS080895 <br />Date Prepared: <br />8/8/95 <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 />8/9/95 <br />Instrument I.D.#: <br />F4 <br />F4 <br />F4 <br />F4 <br />F4 <br />F4 <br />LCS % <br />Recovery: <br />79 <br />78 <br />67 <br />79 <br />70 <br />76 <br />Control Limits: <br />5-112 <br />23-134 <br />XXXXXXXXxxxx <br />20-124 <br />RL -230 <br />44142 <br />22-147 <br />MS/MSD <br />Batch #: <br />9507F92-03 <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 />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 />8/9/95 <br />Instrument I.D.#: <br />F4 <br />F4 <br />F4 <br />F4 <br />F4 <br />F4 <br />Matrix Spike <br />% Recovery: <br />13 <br />13 <br />13 <br />11 <br />13 <br />11 <br />Matrix Spike <br />Duplicate % <br />Recovery: <br />94 <br />91 <br />79 <br />82 <br />76 <br />88 <br />Relative % <br />Difference: <br />150 <br />151 <br />142 <br />152 <br />141 <br />157 <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 />Page 1 of 2 <br />E <br />5080010.DLT <9> <br />