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SEQUOIA ANALYTICAL
<br /> 1 680 Chesapeake Drive • Redwood City, CA 94063
<br /> (415)364-9600 • FAX(415) 364-9233
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<br /> Client Project ID: 150056.01,Tracy Schools
<br /> 11710 Main Street Matrbc Liquid
<br /> trI`scalon, CA 95320
<br /> Attention: John Lane DC Sample Groupe 4AG360t-3 _ Reported: Feb 9, 1994
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<br /> QUALITY CONTROL DATA REPORT
<br /> ANALYTE Benzene Toluene Ethyl Xylenes
<br /> Benzene '
<br /> Method: EPA 8020 EPA 8020 EPA 80x0 EPA 6020
<br /> Analyst: M.Kipp M.Kipp M.Kipp M.Nipp
<br /> MS/MSD
<br /> Batch#: 4AC89M 4AC8906 4AC8906 4AC8906
<br /> Date Prepared: - - - -
<br /> Date Analyzed: 2/1/94 2/1/94 2/1/94 2/1/94
<br /> Instrument I.D.#: GCHP-3 GCHP-3 GCHP-3 GCHP-3
<br /> Conc. Spiked: lopg/L 101rg/L 10ug/L 30pg/L f
<br /> Matrix Spike
<br /> %Recovery: 98 98 96 100
<br /> Matrix Spike
<br /> Duplicate%
<br /> Recovery: ';100 100 100 103
<br /> Relative% s
<br /> Difference: :2-0 2.0 20 3.0 �
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<br /> e
<br /> LCS Batch
<br /> Date Prepared: - - - -
<br /> 1
<br /> Date Analyzed: - - - -
<br /> Instrument I.D.#: - - - -
<br /> M
<br /> LCS%
<br /> Recovery:
<br /> Recovery
<br /> E Control Limits: 71.133 72-126 72130 71-120
<br /> Please Note:
<br /> The LCS is a control sample of known,interferent free matrix that is analyzed using the same reagents,
<br /> iE0001A ANALYTICAL 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, N
<br /> �V�
<br /> LCI the recovery of analytes from the matrix spike does not fall within specrf'ied control limits due to matrix
<br /> interference,the LCS recovery is to be used to validate the batch.
<br /> Vickie Tagus
<br /> Project Manager 4AGWM.WAT <2>
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