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treasure valley road dust study: final report - ResearchGate

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Table A-5. Laboratory Silt Analysis of Winter 2001 Apple St. Sample<br />

Sample ID: RS565<br />

Composite: Gross Weight Tape<br />

BOISL004 240.7 clear<br />

BOISL005 231.6 clear<br />

BOISL006 272.1 red duct<br />

Total 744.4<br />

Sieving:<br />

pan sample diff % diff<br />

Tare 343.1<br />

20 min 440.8 97.7<br />

30 min 453.5 110.4 12.7 11.5<br />

40 min 457.4 114.3 3.9 3.4<br />

Mass Determination<br />

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

Lid 215.9 215.4 -0.5<br />

1/4 inch 488.7 492.6 3.9<br />

4 mesh 444.0 446.7 2.7<br />

18 mesh 369.9 505.5 135.6<br />

30 mesh 444.7 505.8 61.1<br />

50 mesh 409.0 510.5 101.5<br />

100 mesh 383.8 468.7 84.9<br />

200 mesh 379.2 473.6 94.4<br />

Pan 343.1 457.4 114.3<br />

Total Stack 3479.0 3979.8 500.8<br />

Total Stack (with sample) 3979.9<br />

Total Stack (calc) 3478.3 4076.2<br />

.<br />

Silt Calculation<br />

Total stack 3979.8<br />

Tare stack 3479.0<br />

Total sample 500.8<br />

Total silt 114.3<br />

% Silt (

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