OSHA has a wealth of information concerning Waste Anesthetic Gases.  Every facility providing Anesthesia should consider having a Waste Anesthetic Gases policy and program.  Below is the main link to OSHA's Waste Anesthetic Gases web page and a link to a draft of a VA Waste Anesthetic Gas policy that can be adapted at the local level to reflect your specific organizational structure.

http://www.osha.gov/SLTC/wasteanestheticgases/index.html   

Draft of Local VA Policy for Waste Anesthetic Gases (WORD Document)