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uettler-nyan - uunnn <br />6747 Sierra Court, Suite J <br />Dublin, CA 94568 <br />Attention: Doug Lee <br />0 Chesapeake Drive Redwood City, CA 94063 50) 364-9600 FAX (650) 364-9233 <br />N. Wiget lane Walnut Creek, CA 94598 W 10) 988-9600 FAX (510) 988-9673 <br />819 Striker Avenue, Suite 8 Sacramento, CA 95834 (916) 921-9600 FAX (916) 921-0100 <br />Cill. ent project IC: 'Tosco/76 #11194 -Tracy <br />Matrix: Solid <br />QC Sample Group: 806-1355 Reported: Jun 16, 1998 <br />ANALYTE <br />1,1-Dichloro- <br />Trichloro- <br />Chloro- <br />Benzene Toluene Chloro- <br />6/11/98 <br />ethene <br />ethene <br />benzene <br />benzene <br />Method: <br />EPA 8010 <br />EPA 8010 <br />EPA 8010 <br />EPA 8020 EPA 8020 EPA 8020 <br />Analyst: <br />N. Nelson <br />N. Nelson <br />N. Nelson <br />N. Nelson N. Nelson N. Nelson <br />MS/MSD <br />LCS061098 <br />Date Prepared: <br />6/10/98 <br />Date Analyzed: <br />6/11/98 <br />Instrument I.D.#: <br />Batch#: <br />8052259 <br />8052259 <br />8052259 <br />8052259 <br />8052259 <br />8052259 <br />Date Prepared: <br />6/10/98 <br />6/10/98 <br />6/10/98 <br />6/10/98 <br />6/10/98 <br />6/10/98 <br />Date Analyzed: <br />6/11/98 <br />6/11/98 <br />6/11/98 <br />6/11/98 <br />6/11/98 <br />6/11/98 <br />Instrument I.D.#: <br />HP -6 <br />HP -6 <br />HP -6 <br />HP -6 <br />HP -6 <br />HP -6 <br />Conc. Spiked: <br />200µg/kg <br />200pg/kg <br />200pg/kg <br />200pg/kg <br />200pg/kg <br />200pg/kg <br />Matrix Spike <br />% Recovery: <br />85 <br />95 <br />90 <br />100 <br />100 <br />95 <br />Matrix Spike <br />Duplicate % <br />Recovery: <br />95 <br />105 <br />95 <br />105 <br />105 <br />100 <br />Relative % <br />Difference: <br />11 <br />10 <br />5.4 <br />4.9 <br />4.9 <br />5.1 <br />LCS Batch#: <br />LCS061098 <br />Date Prepared: <br />6/10/98 <br />Date Analyzed: <br />6/11/98 <br />Instrument I.D.#: <br />HP -6 <br />LCS % <br />6/10/98 <br />Recovery: <br />105 <br />LCS061098 <br />LCS061098 <br />LCS061098 <br />LCS061098 <br />LCS061098 <br />6/10/98 <br />6/10/98 <br />6/10/98 <br />6/10/98 <br />6/10/98 <br />6/11/98 <br />6/11/98 <br />6/11/98 <br />6/11/98 <br />6/11/98 <br />HP -6 <br />HP -6 <br />HP -6 <br />HP -6 <br />HP -6 <br />110 <br />105 <br />115 <br />115 <br />110 <br />ecovery <br />Control Limits: 65-135 70-130 70-130 70-130 70-130 70-130 <br />SEQUOIA ANALYTICAL, #1271 <br />ulianne Fegley <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 matrix spike is an aliquot of sample <br />fortified with known quantities of specific compounds and subjected to the entire analytical procedure. If <br />the recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br />interference, the LCS recovery is to be used to validate the batch. <br />8061355.GET <10> <br />