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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9606 FAX(415) 364 9233
<br /> / 404 N Wiset Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673
<br /> Analytical 819 Sinker Avenue,Suite 8 Sacramento, CA 95834 (916) 921 9600 FAX(916)921 0100
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<br /> }E A Engineering Science&Tech r ClientProjectID Exxon 7-3942, 83739421307 w
<br /> ss3468 Mt Diablo Blvd , Ste B-100 Matrix Liquid
<br /> "Lafayette, CA 94549 _ _ _ May 23, 1995 }
<br /> +Attention T Faulkner Work Order# 9505983-08, 15
<br /> Reported y>{
<br /> Y rti
<br /> QUALITY CONTROL DATA REPORT
<br /> Analyte. Benzene Toluene Ethyl Xylenes
<br />' Benzene
<br /> OC Batch#. G0051895BTEX17A GC051895BT©(17A GCO51895BTEX17A GC051895BTEX17A
<br /> Analy Method EPA 8020 EPA 8020 EPA 8020 EPA 8020
<br />' Prep Method- EPA 5030 EPA 5030 EPA 5030 EPA 5030
<br /> Analyst: J Minkel J Minkel J Minkel J Minkel
<br /> MS/MSD#. 950598205 950598205 950598205 950598205
<br />' Sample Cone . N D N D N D N D
<br /> Prepared Date 5/18/95 5/18/95 5/18/95 5/18/95
<br /> Analyzed Date. 5/18/95 5/18/95 5/18/95 5/18/95
<br /> Instrument I D.#: GCHP17 GCHP17 GCHP17 GCHP17
<br />' Cone. Spiked 10pg/L 10ug/L 10pg/L 30ug/L
<br /> Result, 88 88 87 26
<br /> MS%Recovery: as 88 87 87
<br /> Dup. Result: as 88 8 8 26
<br /> MSD%Reeov.. 88 88 88 87
<br /> RPD: 00 00 11 00
<br /> RPD Limit. 0.50 0-50 0-50 0-50
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<br /> LCS7T -
<br />' Prepared Date:
<br /> Analyzed Date. - - - -
<br /> Instrument I D.#: _ -
<br /> Cone.Spiked
<br /> LCS Result - -_
<br /> LCS%Recov: - - -
<br /> MS/MSD
<br /> LCS 71-133 72-128 72-130 71-120
<br /> Control Limits
<br />' Please Note
<br /> The LCS is a control sample of known,interferent-tree matrix that is analyzed using the same reagents,
<br /> reqgy�
<br /> LYTICAL 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 If
<br /> the recovery of analytes from the matrix spike does not fall within specified control limits due to matrix
<br /> interference,the LCS recovery is to be used to validate the batch
<br /> enner
<br /> ' Project Manager **MS=Matrix Spike,MSD=MS Duplicate, RPD=Relative%Difference 9505983 EEE <5>
<br />
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