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SEQUOIkANALYTICAL
<br /> 680 Chesapeake Drive • 'Redwood City,CA 94063
<br /> (415) 364-9600 FAX(41'5) 364-9233
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<br /> -Waterwork Client Project ID: 519,Stockton Service/Wever ucking
<br /> 1710 Main Street
<br /> �Escalon, CA 95320
<br /> `;Attention: John Lane Q.C. Sample Group: 106-2710 Reported: Jul 1; 1991
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<br /> QUALITY CONTROL DATA REPORT
<br /> ANALYTE
<br /> Oil&Grease Hexavalent Chromium Lead Cadmium Chromium Nickel Zinc
<br /> Method: SM SSMEF EPA 7196 EPA 7421 EPA 6010 EPA 6010 EPA 6010 EPA 6010
<br /> Analyst: V.Nunzir D.Marcus V.Patel R.Sharma R.Sharma R Sharma R.Sharma
<br /> Reporting Units: m9 mg/kg mg/k9 mg/kg mg/kg mg/kg mg/kg
<br /> Date Analyzed: Jun 20, 1991 Jun 19, 1991 Jun 28, 1991 Jun 28, 1991 Jun 28, 1991 Jun 28, 1991 Jun,28, 1991
<br /> QC Sample#: BLK062091 106-2710 106-3427 106-3202 106.3202 106-3202 106-3202
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<br /> Sample Cone.: N.D. N.D. 12 N.D. 0.56 N.D. 54
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<br /> Spike Cone.
<br /> Added: 100 5.0 50 2500 2500 2500 2500
<br /> Corte. Matrix
<br /> Spike: 82 4.8 58 2500 2400 2300 2500
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<br /> Matrix Spike
<br /> %Recovery: 82 96 92 100 96 92 98 M
<br /> Cone. Matrix
<br /> Spike Dup.: 79 4.9 57 25b0 2400 2400 2500
<br /> Matrix Spike
<br /> Duplicate
<br /> %Recovery: 79 98 90 100 96 96 98
<br /> i
<br /> Relative
<br /> % Difference: 3.7 . 2.1 1.7 0.0 0.0 4.3 0.0
<br /> SE9401A ANALYTICAL %Recovery; Conc.of M.S.-Conc.of Sample x 100
<br /> i Spike Conc.Added
<br /> Rela&e%Difference: Conc.of M.S.-Conc.of M.S.D. x 100
<br /> I beth . Ha I (Cone.of M.S. + Conc.of M.S.D.)/2
<br /> P oject Manager 1062710.WAT <7>'
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