Gasoline Vapor Recovery at Service Stations
To minimize the release of substances that form ozone, New York State is requiring the installation of gasoline vapor recovery systems at your local service stations. The systems recover gasoline vapors during commercial delivery to bulk storage tanks (Stage I) and during refueling of motor vehicles (Stage II).
Stage I
During fuel delivery, the gasoline fumes that are held in bulk storage tanks are piped back into the unloading tanker trucks for transport to vapor processing facilities for destruction or recovery.
Stage II
During refueling, gasoline fumes are trapped by special nozzles at the pump. The captured vapors are fed back into the bulk storage tanks and piped into the unloading tanker trucks for transport to vapor processing facilities.
Two specially designed dispensing nozzles are used to trap vapors during vehicle refueling; the bellows nozzle and the bootless nozzle. 
To Use The Bellows Nozzle:
Push the nozzle firmly into the car's fill pipe, compressing the rubber boot. Tilt the nozzle down as the latch ring hooks under the lip of the pipe so that the ring catches securely.
Slowly squeeze the trigger and add as much fuel as desired. The nozzle will shut off automatically when the tank is full.
Don't Top it off!Trying to add more gasoline after the automatic shutoff can cause the pump to shut down.
To Use The Bootless Nozzle:
Use the bootless nozzle as you would any conventional gasoline nozzle. Again, don't top it off!
