Hi Brendan,
pilot credit 2 obviously correlates with Green Guide for Healthcare EP Credit 3.1-3.5 "Toxic Chemicals Reduction". However, there is a glaring omission in your copy of the GGHC "Potential Technologies & Strategies" and that is the use of borosilicate glass as a piping material. It is one of the most commonly used (esp in chemical waste drainage systems) and sustainable options and has been around for well over 40 years. The GGHC has added borosilicate glass to their list of environmentally preferable materials, see page 298 here: http://www.gghc.org/documents/Version2.2/GGHC-v2-2-Ops-08Rev.pdf
We trust that the LEED credit language will be adopted accordingly to give users a full set of sustainable options. Thank you, Dave