Other resources that you may be interested in
In addition to the Rutgers web page (http://procure.rutgers.edu/), Rutgers have a Green Contract Language document and a example of a letter that went out to their Preferred Vendors requesting information on their company's Green Initiatives and their Green Purchasing pamphlet.
You may also be interested in Rutgers' Facilities webpage on Green Cleaning Products and see what went into the development of that contract (http://facilities.rutgers.edu/UF/New.html).
Make sure you click on the Power Point Presentation at the top of the page.
The number one resource
for sustainability in post-16 education