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treasure valley road dust study: final report - ResearchGate

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Table A-9. Laboratory Silt Analysis of Winter 2001 Front St. Sample<br />

Sample ID: RS571<br />

Composite Gross Weight Tape<br />

BOISL010 251.6 clear<br />

BOISL011 340.4 clear<br />

BOISL012 439.8 clear<br />

Total 1031.8<br />

Sieving:<br />

pan sample diff % diff<br />

Tare 343.0<br />

20 min 487.0 144.0<br />

30 min 505.6 162.6 18.6 11.4<br />

40 min 511.9 168.9 6.3 3.7<br />

Mass Determination<br />

Screen Tare weight (g) Final Weight(g) Net weight(g)<br />

Lid 215.6 215.9 0.3<br />

1/4 inch 489 492.7 3.7<br />

4 mesh 444 448.6 4.6<br />

18 mesh 375.5 590.4 214.9<br />

30 mesh 445 537.1 92.1<br />

50 mesh 408.6 505.2 96.6<br />

100 mesh 384.4 461.4 77<br />

200 mesh 379.3 490.7 111.4<br />

Pan 343 511.9 168.9<br />

Total Stack 3482.9 4251.1 768.2<br />

Total Stack (with sample) 4251.2<br />

Total Stack (calc) 3484.4 4253.9 769.5<br />

.<br />

Silt Calculation<br />

Total stack 4251.1<br />

Tare stack 3482.9<br />

Total sample 768.2<br />

Total silt 168.9<br />

% Silt (

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