McNamara sponsored New Jersey’s open space trust fund, wrote the law to clean up underground storage tanks, re-wrote the laws governing toxic waste cleanup and led the way for a Brownfields law – a plan to get private investors to clean up polluted industrial sites and make those sites clean and useful again.
In 2005, Discovery Nickel Ltd. continued its exploration drilling on the Northeast Botswana Brownfields nickel project, which included the Dikoloti, the Dikoloti North, the Kima, and the Lentswe prospects.
The Small Business Liability Relief and Brownfields Revitalization Act (Pub .L.No. 107-118, 115 stat. 2356, "the Brownfields Law") was signed into law by President George W. Bush on January 11, 2002.