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treasure valley road dust study: final report - ResearchGate

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Table A-15. Laboratory Silt Analysis of Winter 2001 Garrity Blvd Sample<br />

Sample ID: RS580<br />

Composite: Gross Weight Tape<br />

BOISL019 389.5 clear<br />

BOISL020 400.8 clear<br />

BOISL021 312.0 clear<br />

Total 1102.3<br />

Sieving:<br />

pan sample diff % diff<br />

Tare 698.6<br />

20 min 771.0 72.4<br />

30 min 774.5 75.9 3.5 4.6<br />

40 min 777.6 79.0 3.1 3.9<br />

Mass Determination<br />

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

Lid 216.1 216.1 0.0<br />

1/4 inch 489.3 493.0 3.7<br />

4 mesh 443.9 444.5 0.6<br />

18 mesh 371.3 484.2 112.9<br />

30 mesh 444.4 616.2 171.8<br />

50 mesh 408.8 626.9 218.1<br />

100 mesh 383.9 540.6 156.7<br />

200 mesh 379.1 509.9 130.8<br />

Pan + 400 698.6 777.6 79.0<br />

Total Stack 3834.7 4709.3 874.6<br />

Total Stack (with sample) 4709.5<br />

Total Stack (calc) 3835.4 4709.0 873.6<br />

.<br />

Silt Calculation<br />

Total stack 4709.3<br />

Tare stack 3834.7<br />

Total sample 874.6<br />

Total silt 79.0<br />

% Silt (

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