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SENT BY: XEROX Telecopier 7017: 5— 3-94 : 10:45 <br />SEQUOIA ANALYTICAL <br />680 Chesapeake Drive Redwood City, CA 94063 <br />(415) 364-9600 • FAX 15) 364-9233 <br />Rheem Drive, Suite B <br />anton, CA 94588 <br />tion: John Lamb <br />t]C <br />SoH V V <br />31-71601-6 <br />4153649233 - <br />QUALITY CONTROL DATA REPORT <br />12098383509:7424 <br />ANALYTE <br />Benzene <br />Date Prepared: <br />Toluene <br />Ethyl <br />Xylenes <br />Diesel <br />- - - GCHP-5 <br />LCS % <br />Recovery: <br />Benzene <br />Recovery <br />Method: <br />EPA 8020 <br />EPA 8020 <br />EPA 8020 <br />EPA 8020 <br />EPA 8015 <br />Analyst: <br />E. Cunanan <br />E. Cunanan <br />E. Cunanan <br />E.Cunanan <br />A. Nagra <br />MS/MSD <br />Batch#: <br />3LB7601 <br />31.67601 <br />3LS7601 <br />3LB7601 <br />31.67705 <br />Date Prepared: <br />12/17/93 <br />12/17/93 <br />12/17/93 <br />12/17/93 <br />12/16/93 <br />Date Analyzed: <br />12/17/93 <br />12/17/93 <br />12/17/93 <br />12/17/93 <br />12/17/93 <br />Instrument I.D.#: <br />GCHP-18 <br />GCHP-18 <br />GCHP-18 <br />GCHP-18 <br />GCHP-5 <br />Conc. Spiked: <br />0.20 mg/kg <br />0.20 mg/kg <br />0.20 mg/kg <br />0.60 mg/kg <br />15 mg/kg <br />Matrix Spike <br />% Recovery: <br />74 <br />e5 <br />a9 <br />89 <br />93 <br />Matrix Spike <br />Duplicate % <br />Recovery: <br />77 <br />a3 <br />92 <br />92 <br />93 <br />Relative % <br />Difference: <br />4.0 <br />2.4 <br />3.3 <br />3.3 <br />0.0 <br />LCS Batch#: - <br />- - - BLK121693 <br />Date Prepared: <br />- - 12/18/93 <br />Date Analyzed: <br />12/17/93 <br />Instrument I.D.#: - <br />- - - GCHP-5 <br />LCS % <br />Recovery: <br />- 113 <br />Recovery <br />Control Limits: 55-145 <br />47-149 47-155 56-140 38-122 <br />SEQUOIA, NALYTICAL <br />Vickie Tag <br />Project Manager <br />LCS is a control sample of known, interferent free matrix that is analyzed using the same reagents, <br />,tion, 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 />)very of analytes from the matrix spike does not fall within specified control limits due to matrix <br />rnce, the LCS recovery is to be used to validate the batch. <br />3L71601.RES <22> <br />