(1) Request for delegation of authority submitted January 27, 1972, by the Governor.

(2) Clarification of control regulations (section 1.8.4) submitted April 27, 1972, by the State Department of Health.

(3) Clarification of control regulations (section 1.8.4) submitted May 2, 1972, by the Governor.

(4) On December 4, 1975, the Governor of South Dakota submitted revisions and additions to the air pollution control regulations (Article 34:10 of the Administrative Rules of South Dakota). The submittal updated rules and regulations; review procedures for newand modified direct sources; variance and enforcement procedure revisions; episode procedure changes; and the addition of new source performance standards similar to those of EPA.

(5) Provisions to meet the requirements of Part D of the Clean Air Act, as amended in 1977 were submitted on January 3, 1979.

(6) A new control strategy for Brookings, South Dakota was submitted on April 16, 1979.

(7) On January 21, 1980, the Governor submitted a plan revision to meet the requirements of Air Quality Monitoring 40 CFR part 58, subpart C, § 58.20, and Public Notification required under section 127 of the Clean Air Act.

(8) Provisions to meet the requirements of Part D of the Clean Air Act, as amended in 1977, were submitted on October 16, 1980.

(9) On September 13, 1982, the Governor submitted a plan revision for a new control strategy for Brookings, South Dakota and an amendment to the opacity regulation for alfalfa pelletizers.

(10) On May 4, 1984, the Governor submitted a plan revision for lead and repealed the hydrocarbon standard.

(11) On January 28, 1988, the Governor submitted a plan revision (1) updating citations to Federal regulations in the South Dakota air pollution control regulations (Administrative Rules of South Dakota 74:26), (2) adopting new ambient air quality standards for particulates (PM₁₀), (3) revising the State administrative procedures for handling permit hearings and contested cases, and (4) correcting deficiencies in the stack height regulations.

(12) In a letter dated August 7, 1986, the Governor submitted revisions to the South Dakota SIP adopting federal stack height regulations (Administrative Rules of South Dakota 74:26). In a letter dated August 20, 1986, the Administrator, Office of Air Quality and Solid Waste of South Dakota, submitted the stack height demonstration analysis with supplemental information submitted on December 3, 1986.

(13) On September 25, 1992 and February 24, 1992, the Governor of South Dakota submitted revisions to the plan for new source performance standards and asbestos.

(14) On September 25, 1991, the designee of the Governor of South Dakota submitted revisions to the plan for new source review, operating permits, and the PM-10 Group II requirements.

(15) On November 10, 1992, the Governor of South Dakota's designee submitted a plan for the establishment and implementation of a Small Business Assistance Program to be incorporated into the South Dakota State Implementation Plan as required by section 507 of the Clean Air Act. An amendment to the plan was submitted by the Governor's designee on April 1, 1994.

(16) On November 12, 1993 and March 7, 1995, the designee of the Governor of South Dakota submitted revisions to the plan, which included revised regulations for definitions, minor source construction and federally enforceable state operating permit (FESOP) rules, source category emission limitations, sulfur dioxide rule corrections, new source performance standards (NSPS), new source review (NSR) requirements for new and modified major sources impacting nonattainment areas, and enhanced monitoring and compliance certification requirements. The State also requested that the existing State regulations approved in the South Dakota SIP be replaced with the following chapters of the recently recodified Administrative Rules of South Dakota (ARSD): 74:36:01-74:36:04, 74:36:06; 74:36:07, 74:36:10-74:36:13, and 74:36:15, as in effect on January 5, 1995.

(17) On May 2, 1997, the designee of the Governor of South Dakota submitted revisions to the plan. The revisions pertain to revised regulations for definitions, minor source operating permits, open burning, and performance testing. The State's SIP submittal requested that EPA replace the previous version of the ARSD approved into the SIP with the following chapters of the ARSD as in effect on December 29, 1996: 74:36:01 through 74:36:03, 74:36:04 (with the exception of section 74:36:04:03.01), 74:36:06, 74:36:07, 74:36:10-13, and 74:36:17. EPA is replacing all of the previously approved State regulations, except the NSPS rules in ARSD 74:36:07, with those regulations listed in paragraph (c)(17)(i)(A). ARSD 74:36:07, as in effect on January 5, 1995 and as approved by EPA at 40 CFR 52.2170(c)(16)(i)(A), will remain part of the SIP. [Note that EPA is not incorporating the revised ARSD 74:36:07, new ARSD 74:36:11:04, or new ARSD 74:36:17 in this action, as these chapters will be acted on separately by EPA.]

(18) On May 2, 1997 and on May 6, 1999, the designee of the Governor of South Dakota submitted revisions to the new source performance standards in subchapter 74:36:07 of the Administrative Rules of South Dakota (ARSD).

(19) On May 2, 1997 and on May 6, 1999, the designee of the Governor of South Dakota submitted provisions in Section 74:36:11:04 of the Administrative Rules of South Dakota. The provisions allow permitted sources to request permission to test a new fuel or raw material, to determine if it is compatible with existing equipment and to determine air emission rates, before requesting a permit amendment or modification if certain conditions are met.

(20) On January 22, 1996, the designee of the Governor of South Dakota submitted provisions in Section 74:36:17 of the Administrative rules of South Dakota. The provisions consist of street sanding requirements that apply within the city limits of Rapid City, South Dakota.

(21) On May 6, 1999 and June 30, 2000, South Dakota submitted revisions to its Air Pollution Control Program Rules. The sections of the rule being approved replace the same numbered sections that have previously been approved into the SIP. The provisions of section 74:36:07, except 74:36:07:29 and 74:36:07:30, which have previously been incorporated by reference in paragraphs (c)(16)(i)(A) and (c)(18)(i) of this section, are being removed from the South Dakota SIP.

(22) On June 27, 2002, the designee of the Governor of South Dakota submitted revisions to the State Implementation Plan. The June 27, 2002 submittal consists of revisions to the Administrative Rules of South Dakota. These revisions add a new chapter 74:36:18, “Regulations for State Facilities in the Rapid City Area”. Chapter 74:36:18 regulates fugitive emissions of particulate matter from state facilities and state contractors that conduct a construction activity or continuous operation activity within the Rapid City air quality control zone.

(23) On September 12, 2003, the designee of the Governor of South Dakota submitted revisions to the State Implementation Plan. The September 12, 2003 submittal revises the following chapters of the Administrative Rules of South Dakota: 74:36:01, 74:36:04, 74:36:10 and 74:36:11.