Find out if your site meets any of the following three options:

Thirty percent of non-building surfaces are shaded by trees; have light-colored site surfaces with an SRI of 29 or greater; or have open-grid pavement. A combination of these three strategies is also acceptable. 
Fifty percent of parking spaces are covered or underground.
At least 50% of the parking lot area has open-grid paving (at least 50% pervious).