(a) The Puerto Rico Environmental Quality Board submitted to the Environmental Protection Agency on May 20, 2003, a “State Plan” for implementation and enforcement of 40 CFR part 60, subpart DDDD, Emission Guidelines and Compliance Times for Commercial and Industrial Solid Waste Incineration Units. The State Plan includes revisions to Rule 102 and Rule 405 of the Puerto Rico Regulations for the Control of Atmospheric Pollution, entitled, “Definitions” and “Incineration”, respectively. Revised Rules 102 and 405 were adopted on June 4, 2003 and effective on July 4, 2003.

(b) Identification of sources: The plan applies to all applicable existing Commercial and Industrial Solid Waste Incineration Units for which construction commenced on or before November 30, 1999.