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SENT BY: XEROX relecopier 7017: <br />5- 3-94 : 10:47 , <br />ch1woothene <br />EPA 8240 <br />. Hoffmann <br />Benzene <br />EPA 9240 <br />S. Hoffmann <br />SEQUOIA <br />ANALYTICAL <br />680 Chesapeake Drive <br />Redwood City, CA 94063 <br />(415) 364-9600 • FAX ( <br />5) 364-9233 <br />2134 Rheem Drive, Suite B <br />Pleasanton, CA 94588 <br />Attention: John Iamb <br />QC <br />Soil <br />3L71601-6 <br />4153649233-+ 12098383509:#26 <br />QUhLITY CONTROL DATA REPORT <br />ANALYTE <br />Method: <br />Analyst: <br />1,1-Dichloroethene T <br />EPA 8240 <br />S. Hoffmann <br />ch1woothene <br />EPA 8240 <br />. Hoffmann <br />Benzene <br />EPA 9240 <br />S. Hoffmann <br />Toluene <br />EPA 8240 <br />S. Hoffmann <br />chloro - <br />benzene <br />EPA 9240 <br />S, Hoffmann <br />MS/MSD <br />Batch#: <br />3L71605 <br />3L71605 <br />31-71605 <br />31-71605 <br />31-71605 <br />Date Prepared: <br />12/16/93 <br />12/16/93 <br />12/16/93 <br />12/16/93 <br />12/16/93 <br />Date Analyzed: <br />12/16/93 <br />12/16/93 <br />12/16/93 <br />12/16/93 <br />12/16/93 <br />Instrument I.D-#: <br />MS -1-16 <br />MS -1-16 <br />MS -H6 <br />MS -H6 <br />MS -H6 <br />Conc. Spiked: <br />2500jig/kg <br />5D0}fg/kg <br />2500 pg/kg <br />2500 ug/kg <br />2500"/kg <br />Matrix Spike <br />% Recovery: <br />68 <br />80 <br />80 <br />8o <br />75 <br />Matrix Spike <br />Duplicate % <br />Recovery: <br />76 <br />92 <br />92 <br />as <br />88 <br />Relative % <br />Difference: <br />11 <br />14 <br />14 <br />9.5 <br />is <br />LCS Batch#: <br />Date Prepared: <br />Date Analyzed: <br />Instrument I.D.#: <br />LCS % <br />Recovery: <br />Control Limits: DL -234 <br />SEQUOIA ANA <br />LYTIC AL <br />ViceTIE. <br />Project <br />Manager <br />71-157 37-151 47-150 <br />LCS is a control sample of known, interferent free matrix that is analyzed using the same reagents, <br />ition, and analytical methods employed for the samples. The matrix spike is an aliquot of sample <br />with known quantities of specific compounds and subjected to the entire analytical procedure. If <br />nary of analytes from the matrix spike does not fall within specified control limits due to matrix <br />mice. the LCS recovery is to be used to validate the batch. <br />3L71601.RES <24> <br />