### 7694Fea R V 5

. M (PSD) permit issued to Mecklenburg Cogeneration Limited Partnership, Inc. for theconstruction ofa 240megawatt cogeneration plant in Mecklenburg County, Virginia. The facility willbe comprised offourpulverized coal-fired boilers capable ofgenerating electricity for Virginia Power, an electric utility company, and steam forBurlington Industries, a textile manufacturer. The permit was issued bythe Virginia Department ofAirPollution Control (DAPC) onMay 18,1990, pursuant to a delegation ofauthority from the U.S. Environmental Protection Agency, Region III, Philadelphia, Pennsylvania. Because ofthe Delegation, any permit issued by the DAPC is an EPA-issued permit for purposes offederal law.40 CFR 124.41; 45 FR 33413 

### (May 19, 1980). 

### PSD permits issuedby theDAPC are subject to thereview provisions of the applicable EPA regulations,40 CFR 124.19 (1989).



### The Administrator issued an Order Denying Review in the above case on December 21, 1990 concluding that 

### review ofDAPC's permit determination

was notwarranted and that it met all necessary requirements offederal law.

Anyone wishing to review the final permit, petition, finalorder, orrelated materials should contact the following offices:
U.S.EPA, Region Ill, AirEnforcement

Branch, New Source Review Section (3AT22), 841 Chestnut Building, Philadelphia, Pennsylvania 19107 Virginia Dept.ofAirPollution Control,

Room 801, Ninth Street Office Building, Richmond, Virginia 23219.

Pursuant to40 CFR 124.19(f)(2), for 

### purposes ofjudicial review,notice is todaybeing publibhed in theFederal Register ofthisfinal Agency action. If available pursuant to the Consolidated Permit Regulations (40 CFR 124),judicial review ofthese determinations under section 307(b)(1) ofthe Clean AirAct maybe sought onlyby thefiling ofa petition for review in the United States Court ofAppeals for the appropriate circuit with 60 days from the date on which this determination is published in the Federal Register. Under section 307(b)(2) oftheAct, this determination shall not be subject to laterjudicial review in any civil or criminal proceedings for enforcement.

Dated:February 8,1991.
Edwin B.Erickson, Regional Administrotor. [FR Doc. 91-4366 Filed 2-22-91;8:45 am]

GILUNG CODE 6560-50 [AD-FRL-3905-3 Docket No. A-88-041

Conference on AirQuality Modeling

AGENCY:.Environmental Protection Agency (EPA). ACTION: Notice ofconference.

SUMMARY: 

### EPA announces the Fifth Conference on Air Quality Modeling. Such a conference is required by section 320 ofthe Clean Air Act (CAA) to be held every 3years. The purpose of the fifth conference is to provide a forum for public review and comment on proposed revisions to the "Guideline on Air Quality Models (Revised)", EPA-450/2- 78-027R (1986), and Supplement A (1987) (hereinafter, the "Guideline"). Such revisions are based on analyses of
comments received at the Fourth Conference on Air Quality Modeling, held October 1988, and are proposed as Supplement B to te Guideline. DATES: The fifth conference will be held

on March 19, 1991 from 9 a.m. to 5 p.m. As needed to allow for presentation of all verbal comments, the conference may extend to noon of the next day. Requests to speak at the conference should be submitted to the individuals listed below by March 12, 1991. All written comments must be submitted by May 6, 1991. ADDRESSES: Conference: The conference will be held in the GSA Auditorium, GSA National Capitol Region Building, 7th and D Streets, SW., Washington, DC.

Comments: Written statements or comments not presented at the conference shouldbe submitted (in duplicate ifpossible) to: Air Docket (LE131), Room M-1500, Waterside Mall, Attention: Docket A-88-04, U.S. Environmental Protection Agency, 401 M Street SW., Washington, DC 20460.

Copies ofSupplement B (draft)to the Guideline may be obtainedby writing or calling Joseph A. Tikvart, Source Receptor Analysis Branch, MD-14, U.S. Environmental Protection Agency, Research Triangle Park, NC 27711, phone (919) 541-5561. Supplement B (draft) is also available to registered

users ofthe Support Center for Regulatory Air Models Bulletin Board System by downloading the appropriate file.To register or access this electronic bulletin board, users with a personal computer should dial (919) 541-5742.

Docket: Items referenced in thisnotice

as well as comments received are maintained at Docket A-88--04. The docket is available forpublic inspection and copying between 8 a.m. and 4 p.m., Monday through Friday, at the address above. A reasonable fee may be charged forcopying. FOR FURTHER INFORMATION CONTACT. 

### Joseph A.Tikvart. Chief,Source Receptor Analysis Branch (MD-14), Office ofAir Quality Planning and Standards, U.S. Environmental Protection Agency, Research Triangle Park, NC 27711; telephone (919) 541-5562

or C.Thomas Coulter,telephone (919) 541-0832.
SUPPLEMENTARY INFORMATION:. 

### Background

The Guideline is used by EPA, States, and private industry inthe review and preparation ofnew source permits and SIPrevisions. The Guideline serves as a
means bywhich consistency is maintained in air quality analyses. It

was first incorporated in the Code of Federal Regulations in 1978 andwas subsequently revised in 1986 to include knowledge concerning medeling analyses that developed since the original guidance was issued. In 1988 four techniqueswere added as Supplement A to the Guideline as a result ofpublic comments onthe 1986 revisions.

To support the process ofdeveloping and revising the Guideline during the period 1977-1988, theFirst, Second and Third Conferences on Air Quality Modeling were heldas requiredby section 320 ofthe Clean AirAct to help standardize modeling procedures. These modeling conferences provided EPA with comments on the Guideline and associated revisions, thereby facilitating introduction ofimproved modeling techniques into the regulatory process.

In October 1988, the Fourth Conference on Air Quality Modeling

was held. Itspurpose was to advise the publicon new modeling techniques and
to solicit comments to guide EPA's consideration of anyrulemaking needed to furtherrevise the Guideline. The new modelsprovide techniques forsituations where specificprocedures had not previously been available, and also improve several previously adopted techniques. These new techniques and the guidance discussed at the modeling conference are: ComplexTerrain Dispersion Model, Ozone precursor point source modeling, Mobile source modeling at signalized intersections, Emissions and dispersion modeling system forairports, Long-range transport models, Models forestimating visibilityimpact ofspecific sources, Model forshoreline dispersion, Valley stagnation, On-site meteorological program guidance, 

### Federal Register / Vol. 66, No. 37 / Monday, February 25, 1991 / 

### Notices 76fl4

### Federal Register / Vol. 56, No. 37 1 Monday, February 25, 1991 / Notices

Method for evaluating models, General screening techniques, Regional scale models, Modeling techniques forair pathway analyses. In general, EPA solicited comments on (1) 

### whether the techniques are sound, (2] 

### whether they should be adopted for regulatory application, and (3)whether limitations on use, Including database requirements, should be specified.

All comments presented at the fourth modeling conference and/or submitted to Docket A-88-04 are encompassed in Docket Items H-D, II-E,and 1-G. Also,

a verbatim transcript ofthe conference proceedings is available as Docket Item 1I-G-3a and b. EPA has summarized these comments, developed responses, and drawn conclusions on appropriate actions in the document "Summary of Public Comments and EPA Responses

on theFourth Conference on Air Quality Modeling--October 1988" (Docket Item 1-0-1).

The following are being proposed as models or analysis procedures recommended forinclusion in the Guideline: ComplexTerrain Dispersion Model (refinedmodel, accompanied by CTSCREEN and modifications in theuse ofother screening models); CAL3QHC (carbon monoxide estimates at signalized intersections); modeling for airpathway analysis oftoxic/hazardous pollutants (consistent multimedia use of ISC and other models); EDMS (modeling system for airports); on-site meteorological program guidance (expansion ofcurrent guidance); general screening techniques and VISCREEN (updates and computerization ofcurrent screening techniques); method for evaluating models (enhancement of current guidance). For the mostpart, these models and analysis procedures

are designed for operation on or to be compatible with a personal computer.

The following are being proposedfor addition to Appendix Bofthe Guideline with an indication that theyare available for application in theunique circumstances to which they apply on a case-by-case basis: Shoreline Dispersion Model (sea/lakebreeze fumigation) and WYND valley (valleystagnation). Two models falling in a similarcategory that

are already in Appendix Bare: MESOPUFF-II (long-range transport) and PLUVUE-lI (visibility).

Besides adding new techniques, EPA is alsoproposing to clarify and update portions ofthe Guideline to make it consistent with currentregulatory programs that have been established through otherAgency activities.

These models and other changes will be adopted in Supplement B(Draft)to the Guideline (DocketItem III-B-1); see the "ADDRESSES" 

### section ofthis Notice forgeneral availability. Ofthe 

### techniques considered at thefourth modeling conference, only two are not being proposed forfurther action at this time; they are point source modeling for

ozone precursors and regional scale models.

This conference is serving jointly as a public hearing on proposed amendments
to EPA regulations which appear at40 CFR 51.166 and 52.21. The amendments relate to using air quality models and adding by reference Supplement B to the revised modeling guideline. EPAhas previously issued a notice (see 56 FR 5900-5907, February 13, 1991), on a Public hearing concerning these amendments.

Public Participation

The Fifth Conference on Air Quality Modeling will be open to the public, no admission fee is charged. The Conference will begin in the morning with briefings by EPA officials on Supplement B concerning proposed changes and additions to the Guideline. Emphasis will be on complex terrain dispersion models, mobile source modeling at signalized intersections, and stability classification schemes used in on-site meteorological data programs. The conference will continue with
statements fromrepresentatives ofthe Air and Waste Management Association. In the afternoon, invited
statements willbe provided by the National Academy of Sciences, representatives ofState and local air pollution control agencies, and appropriate Federal agencies including the National Science Foundation, the National Oceanic and Atmospheric Administration, the National Institute of Standards and Technology (formerly, the National Bureau ofStandards), and others. The conference will then be opened to statements and comments from the general public.

EPA solicits advice and comments especially on: (1) Proposed changes to 40 CFR 51.166 and 52.21; (2) the technical
content ofSupplement B and its adoption forregulatory application; (3) limitations on use, including data base requirements, that shouldbe specified for the techniques proposed in Supplement B; and (4) proposed changes
to other sections of40 CFR 51 to give
status to long standing EPA policy regarding the use ofair quality models in several regulatory programs (e.g., 51.46, 51.112, 51.117, 51.150, 51.1601.

Persons wishing to speak at the conference should contact EPA at the address given in the "FtHMER
INFORMATION" section no later than March 12. Suchpersons should identify the organization (ifany) on whose behalfthey are speaking and the length ofpresentation. Ifa presentation is projected to be longer than 15 minutes, the presenter should also state why a longer period is needed. Persons failing
to submit a written notice but desiring to speak at the conference should notify the presiding officer immediately before the conference and will be scheduled on

a time-available basis.

The conference will be conducted informally and chaired by an EPA official. There willbe no sworn testimony or cross examination. A verbatim transcript ofthe conference proceedings will be made and placed in the docket. Speakers should bring extra copies oftheir presentation for inclusion in the docket, for the convenience ofthe reporter and the Agency panel. Speakers will be permitted to enter into the record any additional written comments that

are not presented orally.Additional written statements or comments should be sent to the Central Docket Section (see ADDRESSES section). A transcript of the proceedings and a copy ofall written comments will be maintained in Docket A-88-04 which will remain open until May 6, 1991 for the purpose of receiving additional comments.

Dated: February 19, 1991. Michael Shapiro, ActingAssistant Administrator forAi and Radiation. [FR Doc. 91-4369 Filed 2-22-21; 8:45 am]

SLUNG COOE 650-5-U

[FRL3908-1]

Clean Water ActReauthorization; Harnessing Market Forces and Alternative Financing Mechanisms

AGENCY. Environmental Protection Agency. ACTION: Notice of a meeting togather information on the use ofmarket forces and alternative financing to support programs mandated by the Clean Water Act (CWA).

SUMMARY: As part ofan on-going effort
to gather information that could be used in the reauthorization ofCWA, EPA is conducting a series ofsymposia on major cross-cutting issues.The first meeting ofthe series is scheduled for February 23-24 to discuss the issue of risk and to identify and rank the remaining areas of significant risks to water resources.

The subject meeting, which is the second in the series, will address the feasibility ofusing market forces and 

### 7695