Obtain documentation confirming that your project building was contaminated and that remediation was completed. Ask building management to provide an ASTM E1903-97, Phase II Environmental Site Assessment and proof of remediation. However, such documentation is not common and may be hard to find if remediation was well in the past.
Aim for a building constructed on a brownfield site that was subsequently remediated. Consult with building management to find out if any kind of remediation was ever carried out on the property. Be sure to inquire about asbestos remediation, which also qualifies even though it does not define a site as a “brownfield.”
Your safest best in pursuing Option 2 is to look for building environmental features to already be in place at the time of building selection. At the least, they must be in place by the time your LEED-CI project submits this credit.
