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SEQUOIA ANALYTICAL <br />IrrD_ 680 Chesapeake Drive • Redwood City, CA 94063 <br />1,0 (415) 364-9600 • FAX (415) 364-9233 <br />2134 Rheem Drive, Suite B Matrix: Solid <br />Pleasanton, CA 94588 <br />Attention: John Lamb OC Sample Group: 31<66101-06 Reported: Nov 23, 1 <br />QUALITY CONTROL DATA REPORT <br />ANALYTE Diesel <br />MftiOd: EPAb015Rad. <br />Analyst: D. Tran <br />MS/MSD <br />Batch#: 31<66103 <br />Date Prepared: 11/15/93 <br />Date Analyzed: 11/17/93 <br />Instrument I.D.#: GCHP-4A <br />Conc. Spiked: 15 mg/kg <br />Matrix Spike <br />% Recovery: 84 <br />Matrix Spike <br />Duplicate % <br />Recovery: as <br />Relative % <br />Difference: 2.4 <br />LCS Batch#: BLKn1593 <br />Date Prepared: 11/15/93 <br />Date Analyzed: 11/17/93 <br />Instrument I.D.#: GCHP4A <br />LCS % <br />Recovery: 100 <br />% Recovery <br />Control Limits: 38-122 <br />SEQUOIA OI(�ANALYTICAL <br />I/ 1 l l�(T--- <br />Vickie Tague <br />Project Manager <br />lease Note: <br />The LCS is a control sample of known, interferent free matrix that is analyzed using the same reagents, <br />)reparation, and analytical methods employed for the samples. The matrix spike is an aliquot of sample <br />ortified with known quantities of specific compounds and subjected to the entire analytical procedure. M <br />he recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br />oterference, the LCS recovery is to be used to validate the batch. <br />3K66101.RES <4> <br />