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treasure valley road dust study: final report - ResearchGate

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Table A-20. Laboratory Silt Analysis of Summer 2001 6th St. Sample<br />

Date:8/29/01<br />

Technician:KAS<br />

Project:BOISE<br />

Sample<br />

ID:RS630<br />

BOISL070,071,072<br />

Gross weight of sample _1308.1g<br />

___________<br />

Sieving:<br />

pan sample diff % diff<br />

Tare 698.6<br />

20 min 711.5 12.9<br />

30 min 712.4 13.8 0.9 6.5<br />

40 min 712.5 13.9 0.1 0.7<br />

Mass Determination<br />

.<br />

Screen<br />

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

Lid 216 216 0<br />

1/4 inch 488.8 833.5 344.7<br />

4 mesh 445.8 641.9 196.1<br />

18 mesh 368.1 748.2 380.1<br />

30 mesh 442.9 514.5 71.6<br />

50 mesh 408.4 481.8 73.4<br />

100 mesh 383.7 422.7 39<br />

200 mesh 378.9 402.2 23.3<br />

Pan (+400*) 698.6 712.5 13.9<br />

Total Stack 3831.3 4973.3 1142<br />

Total Stack+sample 4973.5<br />

Silt Calculation<br />

Total stack 4973.3<br />

Tare stack 3831.3<br />

Total sample 1142<br />

Silt (

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