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There are a multitude of ways for a contractor to be green.
Sustainable site - SS
don't disturb or minimize land disturbance, implement a storm water management (dikes, retaining fences..) to divert surface run-off; plant fast growing grasses, mulching over disturbed grass.,etc..
Offer alternate fuel Vehicle refueling stations in new or renovated buildings (design/build jobs), 240 Volts outlets for electric vehicles; use impervious materilas for parking.
If you are a developper, you can have a much bigger impact by chosing a sustainbale site near transportation, etc..
Water efficiency - WE
Capturing rain water for irrigation or for cooling tower make-up are popular features; dual flush toilets; waterless urinals (where allowed by code), use on-demand water heaters, etc..
Energy and Atmosphere - EA
Use R-410A, R-134A refrigerants; High eficiency AC units; Assist in Commissioning process during construction, connect to a green power source, use of co-generation if design/build, seek federal or stae incentives that you may find economically attractive, etc..
Materials and Resources - MR
This is one area where a contractor has a very big impact, contractors have access to used materials of all kinds, you could DE-CONSTRUCT buildings instead of demolishing them and re-use the lumber, the windows, etc.. when you can, especially the lumber. Or re-direct recyclable materials to sources that will re-use them such as community-forklifts programs; use materials with high recycled content; use local products instead of imported all the way from China or Nafta, or whatever.
Indoor Environment Quality - IEQ
Flush your building with 100% fresh air one month prior to occupancy to remove VOC's from new carpets, paints or buy your carpets early and have it stored in an aired out warehouse prior to installation.
There are several ways a contractor can contribute, it starts with getting involved and asking the question just like what you just did.
Welcome!!!
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