LEEDS Credit No. 6.2
LEEDS Credit No. 6.2
(OP)
LEEDS Credit No. 6.2 gives one point for storm water quality on a project seeking LEEDS certification. One requirement is that the design must capture and treat 90% of the annual rainfall. Most storm water quality management units on the market are designed to treat the first flush only, with the excess bypassing the unit and going directly to the outfall. The idea is that the majority of pollutants are in the first flush, and if a unit can remove 90%+ of pollutants from the first flush it has essentially cleaned the storm water to an acceptable level.
My questioning is, would that line of thinking be acceptable to the LEEDS gurus? If the first flush amounts to 10% of the total rainfall, but contains all of the pollutants, if you remove 90% of those pollutants would that qualify you for the LEEDS point (assuming the other requirements are met)?
My questioning is, would that line of thinking be acceptable to the LEEDS gurus? If the first flush amounts to 10% of the total rainfall, but contains all of the pollutants, if you remove 90% of those pollutants would that qualify you for the LEEDS point (assuming the other requirements are met)?





RE: LEEDS Credit No. 6.2
Most of BMP/Storm water quality management units are capable of treating the peak runoff rates from a 1" rainfall event without bypassing the flow.
Read through the credit again to find the storm rainfall total that the BMP needs to treat and then do the runoff calcs to show that the BMP does not bypass for that event.
You should be able to claim the credit then.