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| {{alert|This page is an edit and testing page use by the wiki authors. It is not a content page for the Manual. Information on this page may not be accurate and should not be used as guidance in managing stormwater.|alert-danger}} | | {{alert|This page is an edit and testing page use by the wiki authors. It is not a content page for the Manual. Information on this page may not be accurate and should not be used as guidance in managing stormwater.|alert-danger}} |
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− | 1. Dissolved phosphorus (P), defined as P in water passing through a 0.45 micron filter, is about how many times more bioavailable than particulate P
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− | *0.1
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− | *1
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− | *'''5'''
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− | *20
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− | The implication is that if we focus only on particulate phosphorus, the impact on receiving waters will be limited.
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− | 2. Which of these practices is generally not considered to be effective in removing dissolved phosphorus
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− | *'''Constructed ponds'''
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− | *Infiltration
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− | *Street sweeping
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− | *Iron-enhanced filtration
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− | Constructed ponds remove sediment and are not very effective at removing dissolved pollutants
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− | 3. Which of these is least effective in attenuating P, assuming properly designed and maintained systems
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− | *iron
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− | *'''biochar'''
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− | *aluminum
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− | *spent lime
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− | Although still being researched, biochar appears to have limited ability to attenuate phosphorus, though it will not typically leach P and some types may have some ability to attenuate P
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− | 4. True or '''false''': Infiltration is considered an effective practice for treating dissolved P because the P is adsorbed in the infiltration practice
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− | False (most of the time). Infiltration practices don't necessarily remove dissolved P from the water, but instead the dissolved P is transported to groundwater, where it is typically not a concern.
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− | 5. True or '''false''': Peat is a not a suitable substitute for compost in bioretention media because it also leaches P
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− | False. It is a suitable substitute in terms of minimizing P leaching. The concern with peat is mining it is not sustainable.
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− | Bonus: Street sweeping is most effective when (give 2 or more answers)
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− | *applied in residential areas with dense tree canopy
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− | *timed with leaf drop
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− | *vacuum or regenerative air sweepers are used
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− | *infiltration is not feasible
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