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treasure valley road dust study: final report - ResearchGate

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Table A-25. Laboratory Silt Analysis of Summer 2001 Pierce Park Sample<br />

Date:8/29/01<br />

Technician:KAS<br />

Project:BOISE<br />

Sample<br />

BOISL073,074,075<br />

Gross weight of sample: 1801.0g 1/4 of the sample<br />

ID:RS631<br />

Sieving:<br />

pan sample diff % diff<br />

Tare 724.5<br />

20 min 750.5 26<br />

30 min 751.2 26.7 0.7 2.6<br />

40 min 0 -724.5 -751.2 103.7<br />

Mass Determination<br />

.<br />

Screen<br />

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

Lid 222.5 22.5 -200<br />

1/4 inch 488.9 582.2 93.3<br />

4 mesh 445.9 472.8 26.9<br />

18 mesh 369 1198.4 829.4<br />

30 mesh 430.6 782.1 351.5<br />

50 mesh 406.2 894.2 488<br />

100 mesh 378.3 510.5 132.2<br />

200 mesh 376.1 424 47.9<br />

Pan (+400*) 724.5 751.2 26.7<br />

Total Stack 3841.5 5637.9 1796.4<br />

Total Stack+sample 5637.9<br />

Silt Calculation<br />

Total stack 5637.9<br />

Tare stack 3841.5<br />

Total sample 1796.4<br />

Silt (

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