Page 215 - Green Building Through Integrated Design

SITE QUESTIONS 191

1 How can stormwater be managed in the site design to reduce the impact of added
impervious areas on storm sewers and waterways? Are we considering the use of
bioswales and other methods for onsite retention of stormwater?
2 On a greenfield or newly developed site, can we implement a stormwater manage-
ment plan that results in no net increase in the rate or quantity of stormwater runoff
from existing to developed conditions?
3 On an existing developed site, with imperviousness greater than 50 percent, can we
choose roofing, paving, and landscaping measures that will reduce stormwater
runoff by 25 percent? What specific measures might we consider? Could this proj-
ect incorporate a green roof as part of the stormwater management plan?
4 Have we studied the slopes and soils of this site to determine how best to manage
stormwater onsite?
5 Are there soil-testing data available to determine percolation rates and the potential
for groundwater recharge from natural rainfall?
6 Can we design and specify treatment systems for stormwater that will remove
80 percent of total suspended solids (TSS) by using Best Management Practices?
7 Have we consulted with the civil engineer and the local public works and planning
officials about anything unique in our management of water resources on this site?
8 Will we be allowed to recover rainwater and reuse it onsite, or is it prohibited by
state law, as is currently the case in Washington and Colorado?
9 Can the building project help to restore waterways running through, under, or
adjacent to the site?

GREEN ROOFS AND LIGHT POLLUTION QUESTIONS

The subject of green roofs and light pollution reduction involves the architect, electri-
cal engineer, and landscape architect and provides a forum for integrated design con-
siderations.

1 Will rooftop mechanical equipment placement still allow for a green roof? What
about smoke exhaust fans above an atrium? Can they be downsized to allow for
more green-roof space?
2 Is a green roof feasible? Can the budget handle the additional cost? Will the stake-
holders appreciate the amenity and practical values of a green roof? Will the green
roof be available for tours or passive recreation?
3 Should the green roof be extensive (shallow) or intensive (deep)?
4 Will night lighting on the site not impinge on our neighbors?
5 Will night lighting (orientation and levels) on this site still allow for appropriate
dark light levels suitable for nocturnal animals and birds?
6 Is there a “light pollution” ordinance in this jurisdiction that will affect nighttime
lighting levels?
7 Can we meet the IESNA/ASHRAE light pollution requirement for the location
where we’re building or developing?