(Adopted: May 7, 1976)

(Amended: August 24, 1994)

Rule 464

Oil-Effluent Water Separator

A person shall not use any compartment of any vessel or device

operated for the recovery of oil from effluent water which

recovers 760 liters (201 gallons) a day or more of any petroleum

products from any equipment which processes, refines, stores or

handles hydrocarbons with a Reid vapor pressure of 25 mm Hg. (0.5

pound per square inch) or greater unless such compartment is

equipped with one of the following vapor loss control devices:

(a) A solid cover with all openings sealed and totally

enclosing the liquid contents of the compartment.

(b) A floating pontoon or double-deck type cover, equipped

with closure seals to enclose any space between the

cover's edge and compartment wall.

(c) A vapor recovery system which reduces the emission of

all hydrocarbon vapors and gases into the atmosphere by

at least 90 percent by weight.

(d) Other equipment of an efficiency equal to or greater

than (a),(b) or (c), if approved by the Air Pollution

Control Officer.

Any gauging and sampling device in the compartment cover shall be

designed to provide a projection into the liquid surface to

prevent entrained or formed organic vapor from escaping from the

liquid contents and shall be equipped with a cover or lid. The

cover shall be in a closed position at all times except when the

device is in actual use.

This rule shall not apply to any oil-effluent water separator

used exclusively in conjunction with the production of crude oil,

if the water fraction of the oil-water effluent entering the

separator contains less than 5 ppm hydrogen sulfide, organic

sulfides, or a combination thereof.