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| |- | | |- |
| ![[Texture]] | | ![[Texture]] |
− | |<15 % fines||Hydrometer | + | |< 25% silt- and clay-sized particles combined; <br> < 10% clay-sized particles||Hydrometer |
| |- | | |- |
| ![[Organic matter]] (OM) | | ![[Organic matter]] (OM) |
− | |5 - 10 %||ASTM F1647, Standard test methods for organic matter content of athletic field rootzone mixes. | + | |5 to 10% by dry weight||ASTM F1647, Standard test methods for organic matter content of athletic field rootzone mixes. |
| |- | | |- |
| ![[Phosphorus]] | | ![[Phosphorus]] |
− | |12 - 40 ppm||As measured by the 'Olsen' method for alkaline and calcareous soils (common in Ontario). Alternatives include 'Mehlich I or III', or 'Bray', better suited to acidic to slightly alkaline and non-calcareous soils. Results from these are not directly translatable.<ref>Sawyer JE, Mallarino AP. Differentiating and Understanding the Mehlich 3, Bray, and Olsen Soil Phosphorus Tests 1. http://www.agronext.iastate.edu/soilfertility/info/mnconf11_22_99.pdf. Accessed August 1, 2017.</ref> | + | |12 to 40 ppm||As measured by the 'Olsen' method for alkaline and calcareous soils (common in Ontario). Alternatives include 'Mehlich I or III', or 'Bray', better suited to acidic to slightly alkaline and non-calcareous soils. Results from these are not directly translatable.<ref>Sawyer JE, Mallarino AP. Differentiating and Understanding the Mehlich 3, Bray, and Olsen Soil Phosphorus Tests 1. http://www.agronext.iastate.edu/soilfertility/info/mnconf11_22_99.pdf. Accessed August 1, 2017.</ref> |
| |- | | |- |
| ![[Cationic exchange capacity(CEC)]] | | ![[Cationic exchange capacity(CEC)]] |
− | |10 meq/100 g||ASTM D7503-10, Standard test methods for measuring the exchange complex and cation exchange capacity of inorganic fine grained soils. | + | |> 10 meq/100 g||ASTM D7503, Standard test methods for measuring the exchange complex and cation exchange capacity of inorganic fine grained soils. |
| |- | | |- |
| ![[Hydraulic conductivity]] | | ![[Hydraulic conductivity]] |
− | |> 25 mm/hr <br> < 250 mm/hr||Falling head or constant head KSAT | + | |> 25 mm/h <br> < 250 mm/h||Falling head or constant head KSAT |
| |} | | |} |
| | | |
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| | | |
| ===Wood derivatives=== | | ===Wood derivatives=== |
− | The 2017 guidance from New Hampshire specifically rules against the inclusion of compost in their bioretention media.<ref>UNHSC Bioretention Soil Specification. (2017). Retrieved from https://www.unh.edu/unhsc/sites/default/files/media/unhsc_bsm_spec_2-28-17_0.pdf</ref> Instead they recommend sphagnum peat or ''"Shredded wood, wood chips, ground bark, or wood waste; of uniform texture and free of stones, sticks"''. The use of wood chip has been common in New Hampshire for some time, in this 2006 thesis 20 % wood chips (not characterized) were incorporated into all of the test cases to match current practices at the time. <ref>Stone, R. M. (2013). Evaluation and Optimization of Bioretention Design for Nitrogen and Phosphorus Removal. University of New Hampshire. Retrieved from https://www.unh.edu/unhsc/sites/unh.edu.unhsc/files/STONE THESIS FINAL.pdf</ref> | + | The 2017 guidance from New Hampshire specifically rules against the inclusion of compost in their bioretention media.<ref>UNHSC Bioretention Soil Specification. (2017). Retrieved from https://www.unh.edu/unhsc/sites/default/files/media/unhsc_bsm_spec_2-28-17_0.pdf</ref> Instead they recommend sphagnum peat or ''"Shredded wood, wood chips, ground bark, or wood waste; of uniform texture and free of stones, sticks"''. The use of wood chip has been common in New Hampshire for some time, in this 2006 thesis 20% wood chips (not characterized) were incorporated into all of the test cases to match current practices at the time. <ref>Stone, R. M. (2013). Evaluation and Optimization of Bioretention Design for Nitrogen and Phosphorus Removal. University of New Hampshire. Retrieved from https://www.unh.edu/unhsc/sites/unh.edu.unhsc/files/STONE THESIS FINAL.pdf</ref> |
| | | |
| Shredded paper has been tested as an additional source of carbon and as an electron-donor to promote denitrification in a number of successful laboratory and field studies. | | Shredded paper has been tested as an additional source of carbon and as an electron-donor to promote denitrification in a number of successful laboratory and field studies. |
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| | | |
| ==Additives== | | ==Additives== |
− | Typically these components would make up 5- 10 % by volume of the filter media mixture. | + | Typically these components would make up 5- 10% by volume of the filter media mixture. |
| | | |
| {{:Additives}} | | {{:Additives}} |
| ---- | | ---- |