By the end of the year, an emergency trip to the hospital could very well be in the back of a Green Valley Fire District ambulance instead of an AMR one. Last week, the Arizona Department of Health Services approved an Advanced and Basic Life Support Certificate of Necessity, giving the GVFD the ability to transport patients to the hospital using its own ambulances, said GVFD Chief Chuck Wunder. The fire district and AMR, formerly Southwest Ambulance, reached a deal in April allowing both of them to provide ambulance services within the fire district.