8 CAR § 41-1208. Vapor recovery systems

(a) The vapor control system required by 8 CAR § 41-1205 shall include one (1) or more of the following: (1) A vapor-tight line from the stationary storage tank to the delivery vessel and: (A) For a coaxial vapor recovery system, either a poppeted or unpoppeted vapor recovery adaptor; or (B) For a dual point vapor recovery system, a poppeted vapor recovery adaptor; or (2) A refrigeration-condensation system or equivalent designed to recover or destroy at least ninety percent (90%) by weight of the organic compounds in the displaced vapor. (b) If an unpoppeted vapor recovery adaptor is used, the tank liquid fill connection shall remain covered either with a vapor-tight cap or a vapor return line except when the vapor return line is being connected or disconnected. (c) If an unpoppeted vapor recovery adaptor is used, the unpoppeted vapor recovery adaptor shall be replaced with a poppeted vapor recovery adaptor when the tank is replaced or upgraded. (d)(1) Where vapor lines from the storage tanks are manifolded, poppeted vapor recovery adapters shall be used. (2) No more than one (1) tank is to be loaded at a time if the manifold vapor lines have a nominal pipe size of less than three inches (3”). (3) If the manifold vapor lines have a nominal pipe size of three inches (3”) or larger, then two (2) tanks at a time may be loaded. (e) Vent lines on stationary storage tanks shall have pressure release valves or restrictors.