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treasure valley road dust study: final report - ResearchGate

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Table A-13. Laboratory Silt Analysis of Winter 2001 Maple Grove Sample<br />

Sample ID: RS577<br />

Composite: Gross Weight Tape<br />

BOISL016 215.7 clear<br />

BOISL017 208.4 clear<br />

BOISL018 254.8 clear<br />

Total 678.9<br />

Sieving:<br />

pan sample diff % diff<br />

Tare 698.3<br />

20 min 846.7 148.4<br />

30 min 849.3 151.0 2.6 1.7<br />

849.3 151.0<br />

Mass Determination<br />

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

Lid 215.9 216.2 0.3<br />

1/4 inch 488.6 489.6 1.0<br />

4 mesh 443.8 445.6 1.8<br />

18 mesh 371.5 432.5 61.0<br />

30 mesh 443.9 465.7 21.8<br />

50 mesh 408.1 460.1 52.0<br />

100 mesh 383.6 445.1 61.5<br />

200 mesh 378.9 456.1 77.2<br />

Pan + 400 698.3 849.3 151.0<br />

Total Stack 3834.8 4258.5 423.7<br />

Total Stack (with sample) 4258.4<br />

Total Stack (calc) 3832.6 4260.2 427.6<br />

.<br />

Silt Calculation<br />

Total stack 4258.5<br />

Tare stack 3834.8<br />

Total sample 423.7<br />

Total silt 151.0<br />

% Silt (

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