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SEQUOIA ANALYTICAL
<br /> 680 Chesapeake Dnve • Redwood City, CA 94063
<br /> (415) 364-9600 + FAX(415)364-9233
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<br /> 1710 Main Street Matruc Liquid
<br /> 'Escalon, CA 95320 ,
<br /> :Attention John Lane QC Sample Group 3JC0602-3 Reported Oct 26, 1993
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<br /> QUALITY CONTROL DATA REPORT
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<br /> ANALYTE Ethyl_
<br /> Benzene Toluene Benzene Xylenes
<br /> Method: EPA 8020 EPA 8020 EPA 3020 EPA 8020
<br /> Analyst A Miraftab A.Miraftab A.Miraftab A.Miraftab
<br /> Conc. Spiked: 10 10 10 30
<br /> ' Units: Ng/L ug/L ug/L jug/L
<br /> LCS Batch#: GBLK102493 GBLK102493 GBLK102493 GBLK102493
<br /> Date Prepared: - - _ -
<br /> Date Analyzed: 10/24/93 10/24/93 10/24/93 10/24/93
<br /> Instrument LD#: GCHP-3 GCHP-3 GCHP-3 GCHP-3
<br /> LCS %
<br /> Recovery. as 84 84 87
<br /> ' Control Limits: 80-120 80-120 80-120 80.120
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<br /> ' MS/MSD
<br /> Batch#: 3JB1001 3JB1001 SJ1211001 3JB1001
<br /> ' Date Prepared: -
<br /> Date Analyzed: 10/24/93 10/24/93 10/24/93 10/24/93
<br /> Instrument I.D.#: GCHP-3 GCHP-3 GCHP-3 GCHP-3
<br /> ' Matrix Spike
<br /> %Recovery: 100 100 100 103
<br /> ' Matrix Spike
<br /> Duplicate%
<br /> Recovery: 97 97 96 97
<br /> ' Relative%
<br /> Difference: 30 30 41 60
<br /> SEQUOIA ANALYTICAL 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 LCS%recovery data is used for
<br /> validation of sample batch results Due to matrix effects,the OC limits for MS/MSR's are advisory only
<br /> Vickie Tague and are not used to acceptor reject batch results
<br /> ' Project Manager =0601 WAT <3>
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