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treasure valley road dust study: final report - ResearchGate

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Table A-6. Laboratory Silt Analysis of Summer 2001 Apple St. Sample<br />

Date: 8/22/01<br />

Technician:KAS<br />

Project:BOISE<br />

Sample<br />

ID:RS623<br />

BOISL053,054,055<br />

Gross weight of sample _250.4___________<br />

Sieving:<br />

pan sample diff % diff<br />

Tare 698.2<br />

20 min 709.9 11.7<br />

30 min 710.5 12.3 0.6 4.9<br />

40 min 711.2 13 0.7 5.4<br />

Mass Determination<br />

.<br />

Screen<br />

Tare weight (g) Final Weight(g) Sample weight(g)<br />

Lid 216.2 216 -0.2<br />

1/4 inch 488.9 489.7 0.8<br />

4 mesh 445.8 445.8 0<br />

18 mesh 369.4 383.2 13.8<br />

30 mesh 443.5 448.8 5.3<br />

50 mesh 408.4 416.3 7.9<br />

100 mesh 384 391 7<br />

200 mesh 378.8 387.4 8.6<br />

Pan (+400*) 698.2 711.2 13<br />

Total Stack 3833.3 3889.4 56.1<br />

Total Stack+sample 3890.6<br />

Silt Calculation<br />

Total stack 3889.4<br />

Tare stack 3833.3<br />

Total sample 56.1<br />

Silt (

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