Difference between revisions of "Recommended number of soil boring, pits, and permeameter tests for bioretention design"
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| − | <sup>1</sup>an additional soil boring or pit should be completed for each additional 2,500 | + | <sup>1</sup>an additional soil boring or pit should be completed for each additional 2,500 ft<sup>2</sup> above 12,500 ft<sup>2</sup><br> |
| + | <sup>2</sup>an additional five permeameter tests should be completed for each additional 5,000 ft<sup>2</sup> above 15,000 ft<sup>2</sup></font size> | ||
<noinclude>[[category:table]]</noinclude> | <noinclude>[[category:table]]</noinclude> | ||
Revision as of 14:31, 13 February 2014
Design infiltration rates, in inches per hour, for A, B, C, and D soil groups. Corresponding USDA soil classification and Unified soil Classifications are included. Note that A soils have two infiltration rates that are a function of soil texture.*
Link to this table
| Surface area of stormwater control measure (BMP)(ft2) | Borings | Pits | Permeameter tests |
|---|---|---|---|
| < 1000 | 1 | 1 | 5 |
| 1000 to 5000 | 2 | 2 | 10 |
| 5000 to 10000 | 3 | 3 | 15 |
| >10000 | 41 | 41 | 202 |
1an additional soil boring or pit should be completed for each additional 2,500 ft2 above 12,500 ft2
2an additional five permeameter tests should be completed for each additional 5,000 ft2 above 15,000 ft2