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Sequoia 680 Chesapeake Dnve Redwood City,CA 94063 (415) 364 9600 FAX(415)364-9233
<br /> (D- Analytical 404 N Wigct Lane Walnut Creek CA 94596 (510) 988 9600 FAX(510)988-9673
<br /> 819 Sinker Avenue,Suite 8 Sacramento,CA 95834 (916) 921 96M FAX(916)921-0100
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<br /> gro West, Inc A Cllernt Project)0 "Shell, 420 Mst Ketdeman Lane,Lodi, CA" v
<br /> ` 1050 Melody Lane, Ste 160 Matrix Sall
<br /> Roseville, CA 95678
<br /> Attention David L Poulsen QC Sample Group 508-0481 Reported Aug 21, 1995
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<br /> QUALITY CONTROL DATA REPORT
<br /> ANALYTE
<br /> Cadmium Chromium Lead Nickel Zinc Mercury
<br /> Method EPA 6010 EPA 6010 EPA 6010 EPA 6010 EPA 6010 EPA 7471
<br /> Analyst: K Barta K Barta K Barta K Barta K Barta K Barta
<br /> Concentration
<br /> Spiked 50 mg/kg 50 mg/kg 50 mg/kg 5o mg/kg 50 mg/kg 0.25 mg/kg
<br /> LCS Batch#- LCS081495 LCS081495 LCS081495 LCSW1495 LCS081495 LCS081795
<br /> Date Prepared- 8/14/95 8/14/95 8/14/95 8/14/95 8/14/95 8/17/95
<br /> Date Analyzed 8/18/95 8/18/95 8/18/95 8/18/95 8/18/95 8/19/95
<br /> Instrument I.D # P-40 P-40 P-40 P-40 P-40 SH-1000
<br /> LCS %
<br /> Recovery 98 97 97 100 98 106
<br /> Control Limits. 8x120 80-120 80-120 80-120 80120 80-124
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<br /> MS/MSD
<br /> Batch# 5080481 5080481 5080481 5080481 5080481 5080504
<br /> Date Prepared: 8/14/95 8/14/95 8/14/95 8/14/95 8/14/95 8/17/95
<br /> Date Analyzed 8/18/95 8/18/95 8/18/95 8/18/95 8/18/95 8/19/95
<br /> Instrument l D.#. P-40 P-40 P-40 P-40 P-40 SH-1000
<br /> Matrix Spike
<br /> % Recovery: 96 91 89 94 88 100
<br /> Matrix Spike
<br /> Duplicate%
<br /> Recovery: 96 93 94 92 92 104
<br /> Relative%
<br /> Difference 0 0 22 54 2.2 44 3 9
<br /> Please Note
<br /> The LCS is a control sample of known,interferent free matrix that Is analyzed using the same reagents,
<br /> EO OIA ANALYTICAL preparation and analytical methods employed for the samples The LCS%recovery data is used for
<br /> /7 validation of sample batch results Due to matrix effects,the QC limits for MS/MSG's are advisory only
<br /> ��`.•�f„/,� and are not used to accept or reject batch results
<br /> Linda C Schneider CGL
<br /> Project Manager
<br /> 5084481 FUG <4>
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