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SEQUOIA ANALYTICAL
<br /> 680 Chesapeake Drive - Redwood City,CA 94063
<br /> (415) 364-9600 FAX(415) 364-9233
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<br /> RESNA-{Escalon CAient Project ID 150047 01, Ekholm Property
<br /> {1710 Main Street Matrix Liquid
<br /> Escalon, CA 95320
<br /> ' {,Attention John Lane fi m x OC Sample Group 3Jc0604-5 _ ReportedN Oct 26, 1993 m
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<br /> ' OUALITY CONTROL DATA REPORT
<br /> ANALYTE Ethyl-
<br /> Benzene Toluene Benzene Xylenes
<br /> Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020
<br /> Analyst: A Miraftab A Miraftab A Miraftab A.Mimltab
<br /> ' Conc. Spiked: 10 10 10 30
<br /> Units: ug/L jug/L pg/L ug/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 I.D.#: GCHP-2 GCHP-2 GCHP-2 GCHP-2
<br /> LCS %
<br /> Recovery 110 110 110 107
<br /> ' Control Limds 80-120 80-120 80-120 80-120
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<br /> ' MS/MSD
<br /> Batch#: 3JB1001 3.1131001 3JB1001 3JB1001
<br /> Date Prepared: - - - -
<br /> Date Analyzed: 10/24/93 10/24/93 10/24/93 10/24/93
<br /> Instrument 1.13 #: GCHP-2 GCHP-2 GCHP-2 GCHP-2
<br /> ' Matrix Spike
<br /> % Recovery: 98 98 98 97
<br /> ' Matrix Spike
<br /> Duplicate%
<br /> Recovery- 100 100 100 100
<br /> Relative% -
<br /> Difference. 20 20 20 30
<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 /> f p preparation and analytical methods employed for the samples The LCS%recovery data is used for
<br /> Gf�V lJ validation of sample batch results Due to matrix effects,the OC limits for MS/MSD's are advisory only
<br /> and are not used to accept or reject batch results
<br /> Vickie Tague
<br /> Project Manager 3JC0601 WAT s4>
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