The Commonwealth of Massachusetts has certified to the satisfaction of EPA that no sources are located in the Commonwealth which are covered by the following Control Techniques Guidelines:
(a) Large Petroleum Dry Cleaners.
(b) Natural Gas/Gasoline Processing Plants.
(c) Air Oxidation Processes/SOCMI.
(d) Polypropylene/Polyethylene Manufacturing.
[52 FR 32792, Aug. 31, 1987]