CHAPTER 4

A REFERENCE COPY OF 24 CFR PART 51

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DEPARTMENT OF HOUSING AND URBAN DEVELOPMENT

Office of the Secretary

[24 CFR Part 51](http://www.gpoaccess.gov/cfr/index.html)

Environmental Criteria and Standards

Subpart A - General Provisions

EFFECTIVE DATE: August 13, 1979

SOURCE: Federal Register: July 12, 1979; pp 40860-40862

51.1 Purpose

51.2 Authority

51.3 Responsibilities

51.4 Program coverage

51.5 Coordination with environmental clearance requirements

51.6 Reserved

Authority: Section 7(d). Department of Housing and Urban Development Act

(42 U.S.C. 3535 (d)).

51.1 PURPOSE

The Department of Housing and Urban Development is providing program

Assistant Secretaries and administrators and field offices with

environmental standards, criteria and guidelines for determining project

acceptability and necessary mitigating measures to insure that
activities

assisted by the Department achieve the goal of a suitable living

environment.

51.2 AUTHORITY

This Part implements the Department\'s responsibilities under the

following statutes:

\(a\) The National Housing Act of 1934 (P.L. 73-479 ) which was enacted

\"to encourage improvements in housing standards and conditions,

to provide a system of mutual mortgage insurance, and for other

purposes,\" thus providing the basis for HUD\'s Minimum Property

Standards (MIPS) which have evolved as required by legislation

over the past 44 years.

\(b\) The Housing Act of 1949 (P.L. 81-171) which sets forth the

national goal of \"a decent home and a suitable living environment

for every American family,\" affirmed by the Housing and Urban

Development Act of 1968 (P.L. 90-448).

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\(c\) The Department of Housing and Urban Development Act of 1965 (P.L.

89-174) which provides that the Secretary may make such rules and

regulations as may be necessary to carry out functions, powers,

and duties, and sets forth, as a matter of national purpose, the

sound development of the Nation\'s communities and metropolitan

areas.

\(d\) The National Environmental Policy Act of 1969 (P.L. 91-190) which

directs Federal agencies to develop procedures to carry out the

purposes of the Act.

\(e\) Intergovernmental Cooperation Act of 1968 (P.L. 90-577) which,

under Title IV, directs that Federal programs and projects serve

the objectives of appropriate land use for housing, commercial,

industrial, governmental, institutional, and other purposes to

achieve sound and orderly development of all areas, both urban

and rural.

51.3 RESPONSIBILITIES

\(a\) Assistant Secretary for Community Planning and Development. The

Assistant Secretary for Community Planning and Development shall

be responsible for administering environmental regulations, and

shall provide oversight, interpretation and guidance, and shall

update the regulations as required. The Assistant Secretary

shall also maintain liaison with other Federal agencies on

matters of environmental policy implementation.

\(b\) Assistant Secretary for Policy Development and Research. The

Assistant Secretary for Policy Development and Research shall

undertake research and demonstration studies necessary for the

technical development of environmental standards, criteria, and

implementing techniques as a basis for the development and

implementation of environmental regulations. The Assistant

Secretary shall also maintain liaison with Federal agencies on

related technical matters.

\(c\) Other Assistant Secretaries, Administrators, and the General

Counsel. Other Assistant Secretaries, Administrators, and the

General Counsel shall:

\(1\) Incorporate adopted environmental regulations by reference

into program regulations, guidance documents, and

administrative forms and procedures;

\(2\) Evaluate the effects of, and compliance with Departmental

environmental regulations policy and report significant

issues and problems to the Assistant Secretary for Community

Planning and Development; and

\(3\) Identify program areas under their jurisdiction in which

additional environmental regulations are needed, and refer

them to the Assistant Secretary for Community Planning and

Development.

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\(d\) Regional Administrators, Area Office Managers, Service Office

Supervisors. Regional Administrators, Area Office Managers, and

Service Office Supervisors shall assure that adopted

environmental regulations are implemented in relation to program

decisions and recommendations. They shall also monitor projects

to assure that mitigaticn measures are implemented.

51.4 PROGRAM COVERAGE

Environmental standards shall apply to all HUD actions except where

special provisions and exemptions are contained in each Subpart.

51.5 COORDINATION WITH ENVIRONMENTAL CLEARANCE REQUIREMENTS

Environmental standards shall be implemented prior to commitment in

the decision-making process and, where environmental clearances are

required, the decision points shall be identical. Compliance with HUD

environmental standards shall be addressed in the environmental
clearance

process.

51.6 (RESERVED)

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Subpart B - Noise Abatement and Control

EFFECTIVE DATE: August 13, 1979

SOURCE: Federal Register: July 12, 1979; pp 40862-40866

51.100 Purpose and Authority

51.101 General policy

51.102 Responsibilities

51.103 Criteria and standards

51.104 Special requirements

51.105 Exceptions

51.106 Implementation

Appendix I to Subpart B

51.100 PURPOSE AND AUTHORITY

\(a\) Purpose. The Department of Housing and Urban Development finds

that noise is a major source of environmental pollution which

represents a threat to the serenity and quality of life in

population centers and that noise exposure may be a cause of

adverse physiological and psychological effects as well as

economic losses.

It is the purpose of this Subpart to:

\(1\) Call attention to the threat of noise pollution;

\(2\) Encourage the control of noise at its source in cooperation

with other Federal departments and agencies;

\(3\) Encourage land use patterns for housing and other noise

sensitive urban needs that will provide a suitable

separation between them and major noise sources;

\(4\) Generally prohibit HUD support for new construction of noise

sensitive uses on sites having unacceptable noise exposure;

\(5\) Provide policy on the use of structural and other noise

attenuation measures where needed; and

\(6\) Provide policy to guide implementation of various HUD

programs.

\(b\) Authority. Specific authorities for noise abatement and control

are contained in:

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\(1\) The Noise Control Act of 1972 (P.L. 92-574) which directs

Federal agencies to administer their programs in ways which

reduce noise pollution.

\(2\) The Quiet Communities Act of 1978 (P.L. 95-609) which

amended P.L. 92-574.

\(3\) The General Services Administration, Federal Management

Circular 75-2: Compatible Land Uses at Federal Airfields

prescribes the Executive Branch\'s general policy with

respect to achieving compatible land uses on either public

or privately owned property at or in the vicinity of Federal

airfields.

\(4\) Section 1113 of the Housing and Urban Development Act of

1965 (P.L. 89-117) directs the Secretary \"\* \* \* to determine

feasible methods of reducing the economic loss and hardships

suffered by homeowners as a result of the depreciation in

the value of their properties following the construction of

airports in the vicinity of their homes, including a study

of feasible methods of insulating such homes from the noise

of aircraft.\"

51.101 GENERAL POLICY

\(a\) It is HUD\'s general policy to provide minimum national standards

applicable to HUD programs to protect citizens against excessive

noise in their communities and places of residence.

\(1\) Comprehensive planning assistance. HUD requires that

grantees give adequate consideration to noise exposures and

sources of noise exposures and sources of noise as an

integral part of the urban environment in HUD assisted

comprehensive planning, as follows:

\(i\) Particular emphasis shall be placed on the importance

of compatible land use planning in relation to

airports, highways and other sources of high noise.

\(ii\) Applicants shall take into consideration HUD

environmental standards impacting the use of land as

required in 24 CFR Part 600.

\(iii\) Environmental studies, including noise assessments,

are allowable costs.

\(2\) Community Development Block Grants. Recipients of community

development block grants under the Housing and Community

Development Act of 1974 (P.L. 93-383), as amended by the

Housing and Community Development Act of 1977 (P.L. 95-128),

must take into consideration the noise criteria and

standards

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in the environmental review process and consider

ameliorative actions when noise sensitive land development

is proposed in noise exposed areas. Grant recipients shall

address deviations from the standards in their environmental

reviews as required in 24 CFR Part 58.

Where CDBG activities are planned in a noisy area, and HUD

assistance is contemplated later for housing and/or other

noise sensitive activities, the CDBG grantee risks denial of

the HUD assistance unless the HUD standards are met.

Environmental studies, including noise assessments, are

allowable costs.

\(3\) HUD support for new construction. HUD assistance for the

construction of new noise sensitive uses is prohibited

generally for projects with Unacceptable noise exposures and

is discouraged for projects with Normally Unacceptable noise

exposure. (Standards of acceptability are contained in

section 51.103(c).) This policy applies to all HUD programs

providing assistance, subsidy or insurance for housing,

college housing, mobile home parks, nursing homes,

hospitals, and all programs providing assistance or

insurance for land development, new communities,

redevelopment or any other provision of facilities and

services which are directed to making land available for

housing or noise sensitive development. The policy does not

apply to research demonstration projects which do not result

in new construction or reconstruction, flood insurance,

interstate land sales registration, or any action or

emergency assistance under disaster assistance programs

which are provided to save lives, protect property, protect

public health and safety, remove debris and wreckage, or

assistance provided that has the effect of restoring

facilities substantially as they existed prior to the

disaster.

\(4\) HUD support for existing construction. Noise exposure by

itself will not result in the denial of HUD support for the

resale and purchase of otherwise acceptable existing

buildings. However, environmental noise is a marketability

factor which HUD will consider in determining the amount of

insurance or other assistance that may be given.

\(5\) HUD support of modernization and rehabilitation. For

modernization projects located in all noise exposed areas,

HUD shall encourage noise attenuation features in

alterations. For major or substantial rehabilitation

projects in the Normally Unacceptable and Unacceptable noise

zones, HUD actively shall seek to have project sponsors

incorporate noise attenuation features, given the extent and

nature of the rehabilitation being undertaken and the level

of exterior

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noise exposure. In Unacceptable noise zones, HUD shall

strongly encourage conversion of noise exposed sites to land

uses compatible with the high noise levels.

\(6\) Research, guidance and publications. HUD shall maintain a

continuing program designed to provide new knowledge of

noise abatement and control to public and private bodies, to

develop improved methods for anticipating noise

encroachment, to develop noise abatement measures through

land use and building construction practices, and to foster

better understanding of the consequences of noise. It shall

be HUD\'s policy to issue guidance documents periodically to

assist HUD personnel in assigning an acceptability category

to projects in accordance with noise exposure standards, in

evaluating noise attenuation measures, and in advising local

agencies about noise abatement strategies. The guidance

documents shall be updated periodically in accordance with

advances in the state-of-the-art.

\(7\) Construction equipment, building equipment and appliances.

HUD shall encourage the use of quieter construction

equipment and methods in population centers, the use of

quieter equipment and appliances in buildings, and the use

of appropriate noise abatement techniques in the design of

residential structures with potential noise problems.

\(8\) Exterior noise goals. It is a HUD goal that exterior noise

levels do not exceed a day-night average sound level of 55

decibels. This level is recommended by the Environmental

Protection Agency as a goal for outdoors in residential

areas. The levels recommended by EPA are not standards and

do not take into account cost or feasibility. For the

purposes of this regulation and to meet other program

objectives, sites with a day-night average sound level of 65

and below are acceptable and are allowable (see Standards in

section 51.103(c)).

\(9\) Interior noise goals. It is a HUD goal that the interior

auditory environment shall not exceed a day-night average

sound level of 45 decibels. Attenuation measures to meet

these interior goals shall be employed where feasible.

Emphasis shall be given to noise sensitive interior spaces

such as bedrooms. Minimum attenuation requirements are

prescribed in section 51.104(a).

\(10\) Acoustical privacy in multifamily buildings. HUD shall

require the use of building design and acoustical treatment

to afford acoustical privacy in multifamily buildings

pursuant to requirements of the Minimum Property Standards.

51.102 RESPONSIBILITIES

\(a\) Authority to approve projects.

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\(1\) Decisions on proposed projects with acceptable noise

exposures shall be delegated to the program personnel within

field offices, including projects where increased noise

levels are considered acceptable because of non-acoustic

benefits under section 51.105(a). Field office program

personnel may also approve projects in normally unacceptable

noise exposed areas where adequate sound attenuation is

provided and where the project does not require an

Environmental Impact Statement under section 51.104(b).

\(2\) Other approvals in normally unacceptable noise exposed areas

require the concurrence of the Regional Administrator.

\(3\) Requests for approvals of projects or portions of projects

with unacceptable noise exposures shall be referred through

the Regional Office to the Assistant Secretary for Community

Planning and Development for approval pursuant to section

51.104(b).

\(4\) In cases where the Regional Administrator determines that an

important precedent or issue is involved, such cases shall

be referred with recommendations to the Assistant Secretary

for Community Planning and Development.

\(b\) Surveillance of noise problem areas. Appropriate field staff

shall maintain surveillance of potential noise problem areas and

advise local officials, developers, and planning groups of the

unacceptability of sites because of noise exposure at the

earliest possible time in the decision process. Every attempt

shall be made to insure that applicants\' site choices are

consistent with the policy and standards contained herein.

\(c\) Notice to applicants. At the earliest possible stage, HUD

program administrators shall:

\(1\) Determine the suitability of the acoustical environment of

proposed projects;

\(2\) Notify applicants of any adverse or questionable situations;

and

\(3\) Assure that prospective applicants are apprised of the

standards contained herein so that future site choices will

be consistent with these standards.

\(d\) Technical assistance. Technical assistance in the measurement,

estimation, interpretation, or prediction of noise exposure is

available from the Office of Community Planning and Development

and the Office of Policy Development and Research. Field office

questions shall be forwarded through the Regional Office to the

Assistant Secretary for Community Planning and Development or his

designee.

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\(e\) Interdepartmental coordination. Regional Administrators shall

foster appropriate coordination between field offices and other

departments and agencies, particularly the Environmental

Protection Agency, the Department of Transportation, Department

of Defense representatives, and the Veterans Administration. HUD

staff shall utilize the acceptability standards in commenting on

the prospective impacts of transportation facilities and other

noise generators in the Environmental Impact Statement review

process.

51.103 CRITERIA AND STANDARDS

These standards apply to all programs as indicated in section

51.101.

\(a\) Measure of external noise environments. The magnitude of the

external noise environment at a site is determined by the value

of the day-night average sound level produced as the result of

the accumulation of noise from all sources contributing to the

external noise environment at the site. Day-night average sound

level, abbreviated as DNL and symbolized as Ldn, is the 24-hour

average sound level, in decibels, obtained after addition of 10

decibels to sound levels in the night from 10 p.m. to 7 a.m.

Mathematical expressions for average sound level and day-night

average sound level are stated in the Appendix.

\(b\) Loud impulsive sounds. On an interim basis, when loud impulsive

sounds, such as explosions or sonic booms, are experienced at a

site, the day-night average sound level produced by the loud

impulsive sounds alone shall have 8 decibels added to it in

assessing the acceptability of the site (see Appendix).

Alternatively, the C-weighted day-night average sound level

(Lcdn) may be used without the 8 decibel addition, as indicated

in section 51.106(a)(3).

Methods for assessing the contribution of loud impulsive sounds

to day-night average sound level at a site and mathematical

expressions for determining whether a sound is classed as \"loud

impulsive\" are provided in Appendix I to this Subpart.

\(c\) Exterior standards. The degree of acceptability of the noise

environment at a site is determined by the sound levels external

to buildings or other facilities containing noise sensitive uses.

The standards shall usually apply at a location 2 meters (6.5

feet) from the building housing noise sensitive activities in the

direction of the predominant noise source. Where the building

location is undetermined, the standards shall apply 2 meters (6.5

feet) from the building setback line nearest to the predominant

noise source. The standards shall also apply at other locations

where it is determined that quiet outdoor space is required in an

area ancillary to the principal use on the site.

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The noise environment inside a building is considered acceptable

if (a) the noise environment external to the building complies

with these standards, and (b) the building is constructed in a

manner common to the area or, if of uncommon construction, has at

least the equivalent noise attenuation characteristics.

Site Acceptability Standards

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Day-Night average sound Special approvals

level (in decibels) and requirements

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Acceptable\...\..... Not exceeding 65 dB(1)\...\.... None

Normally\...\...\.... Above 65 dB but not Special Approvals (2)

Unacceptable exceeding 75 dB Environmental Review (3)

Attenuation (4)

Unacceptable\...\... Above 75 dB\...\...\...\...\...\... Special
Approvals (2)

Environmental Review (3)

Attenuation (5)

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Notes:

\(1\) Acceptable threshold may be shifted to 70 dB in special
circumstances

pursuant to section 51.105(a).

\(2\) See section 51.104(b) for requirements.

\(3\) See section 51.104(b) for requirements.

\(4\) 5 dB additional attenuation required for sites above 65 dB but not

exceeding 70 dB and 10 dB additional attenuation required for sites

above 70 dB but not exceeding 75 dB. (See section 51.104(a).)

\(5\) Attenuation measures to be submitted to the Assistant Secretary
for

CPD for approval on a case-by-case basis.

51.104 SPECIAL REQUIREMENTS

\(a\) Noise attenuation. Noise attenuation measures are those required

in addition to attenuation provided by buildings as commonly

constructed in the area, and requiring open windows for

ventilation. Measures that reduce external noise at a site shall

be used wherever practicable in preference to the incorporation

of additional noise attenuation in buildings. Building designs

and construction techniques that provide more noise attenuation

than typical construction may be employed also to meet the noise

attenuation requirements.

\(1\) Normally Unacceptable noise zone. Approvals in this zone

require a minimum of 5 decibels additional sound attenuation

for buildings having noise-sensitive uses if the day-night

average sound level is greater than 65 decibels but does not

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exceed 70 decibels, or a minimum of 10 decibels of

additional sound attenuation if the day-night average sound

level is greater than 70 decibels but does not exceed 75

decibels.

\(2\) Unacceptable noise zone. Noise attenuation measures require

the approval of the Assistant Secretary for Community

Planning and Development. (See section 51.104(b)(2).)

\(b\) Special Approvals and Environmental Review Requirements.

Environmental clearances shall be conducted pursuant to the

requirements of HUD\'s Departmental Policies, Responsibilities and

Procedures for Protection and Enhancement of Environmental

Quality (38 FR 19182 as amended) or other environmental

regulations which may be issued by the Department. The Special

Clearance and Environmental Impact Statement (EIS) threshold

requirements are hereby modified for all projects proposed in the

Normally Unacceptable and Unacceptable noise exposure zones as

follows:

\(1\) Normally Unacceptable noise zone.

\(i\) All projects located in the Normally Unacceptable

Noise Zone require a Special Environmental Clearance

except an EIS is required for a proposed project

located in a largely undeveloped area, or where the

HUD action is likely to encourage the establishment

of incompatible land use in this noise zone.

\(ii\) When an EIS is required, the concurrence of the

Regional Administrator is also required before a

project can be approved. For the purposes of this

paragraph, an area will be considered as largely

undeveloped unless the area within a 2-mile radius of

the project boundary is more than 50 percent

developed for urban uses and infrastructure

(particularly water and sewers) is available and has

capacity to serve the project.

\(iii\) All other projects in the Normally Unacceptable zone

require a Special Environmental Clearance, except

where an EIS is required for other reasons pursuant

to HUD environmental policies.

\(2\) Unacceptable noise zone. An EIS is required prior to the

approval of projects with unacceptable noise exposure.

Projects in or partially in an Unacceptable Noise Zone shall

be submitted through the Regional Administrator to the

Assistant Secretary for Community Planning and Development

for approval. The Assistant Secretary may waive the EIS

requirement in cases where noise is the only environmental

issue and no outdoor sensitive activity will take place on

the site. In such cases, a Special Environmental Clearance

is required.

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51.105 EXCEPTIONS

\(a\) Flexibility for non-acoustic benefits. Where it is determined

that program objectives cannot be achieved on sites meeting the

acceptability standard of 65 decibels, the Acceptable Zone may be

shifted to Ldn 70 on a case-by-case basis if all the following

conditions are satisfied:

\(1\) The project does not require an Environmental Impact

Statement under provisions of section 104(b)(1) and noise is

the only environmental issue.

\(2\) The project has received a Special Environmental Clearance

and has received the concurrence of the Environmental

Clearance officer.

\(3\) The project meets other program goals to provide housing in

proximity to employment, public facilities and

transportation.

\(4\) The project is in conformance with local goals and maintains

the character of the neighborhood.

\(5\) The project sponsor has set forth reasons, acceptable to

HUD, as to why the noise attenuation measures that would

normally be required for new construction in the Ldn 65 to

Ldn 70 zone cannot be met.

\(6\) Other sites which are not exposed to noise above Ldn 65 and

which meet program objectives are generally not available.

The above factors shall be documented and made part of the

project file.

51.106 IMPLEMENTATION

\(a\) Use of available data. HUD field staff shall make maximum use of

noise data prepared by others when such data are determined to be

current and adequately projected into the future and are in terms

of the following:

\(1\) Sites in the vicinity of airports. The noise environment

around airports is described sometimes in terms of Noise

Exposure Forecasts, abbreviated as NEF or, in the State of

California, as Community Noise Equivalent Level, abbreviated

as CNEL. The noise environment for sites in the vicinity of

airports for which day-night average sound level data are

not available may be evaluated from NEF or CNEL analyses

using the following conversions to DNL:

DNL = NEF+35

DNL = CNEL

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\(2\) Sites in the vicinity of highways. Highway projects

receiving Federal aid are subject to noise analyses under

the procedures of the Federal Highway Administration.

Where such analyses are available they may be used to assess

sites subject to the requirements of this standard. The

Federal Highway Administration employs two alternate sound

level descriptors: (a) The A-weighted sound level not

exceeded more than 10 percent of the time for the highway

design hour traffic flow, symbolized as L10; or (b) the

equivalent sound level for the design hour, symbolized as

Leq. The day-night average sound level may be estimated

from the design hour L10 or Leq values by the following

relationships, provided heavy trucks do not exceed 10

percent of the total traffic flow in vehicles per 24 hours

and the traffic flow between 10 p.m. and 7 a.m. does not

exceed 15 percent of the average daily traffic flow in

vehicles per 24 hours:

DNL = L10 (design hour) minus 3 decibels

DNL = Leq (design hour) decibels

Where the auto/truck mix and time of day relationships as

stated in this Section do not exist, the HUD Noise

Assessment Guidelines or other noise analysis shall be used.

\(3\) Sites in the vicinity of installations producing loud

impulsive sounds. Certain Department of Defense

installations produce loud impulsive sounds from artillery

firing and bombing practice ranges. Noise analyses for

these facilities sometimes encompass sites that may be

subject to the requirements of this standard. Where such

analyses are available they may be used on an interim basis

to establish the acceptability of sites under this standard.

The Department of Defense uses day-night average sound level

based on C-weighted sound level, symbolized Lcdn, for the

analysis of loud impulsive sounds. Where such analyses are

provided, the 8 decibel addition specified in section

51.103(b), is not required, and the same numerical values of

day-night average sound level used on an interim basis to

determine site suitability for non-impulsive sounds apply to

the Lcdn.

\(4\) Use of areawide acoustical data. HUD encourages the

preparation and use of areawide acoustical information, such

as noise contours for airports. Where such new or revised

contours become available for airports (civil or military)

and military installations they shall first be referred to

the Regional Office (Environmental Clearance Officer) for

review, evaluation and decision on appropriateness for use

by HUD. The

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Regional Office shall submit revised contours to the

Assistant Secretary of Community Planning and Development

for review, evaluation and decision whenever the area

affected is changed by 20 percent or more, or whenever it

is determined that the new contours will have a significant

effect on HUD programs, or whenever the contours are not

provided in a methodology acceptable under section

51.106(a)(1) or in other cases where the Regional Office

determines that Headquarters review is warranted. For

other areawide acoustical data, review is required only

where existing areawide data have been changed to reflect

changes in the measurement methodology or underlying noise

source assumptions. Requests for determination on usage of

new or revised areawide data shall include the following:

\(i\) Maps showing old, if applicable, and new noise

contours, along with brief description of data

source and methodology.

\(ii\) Impact an existing and prospective urbanized areas

and on development activity.

\(iii\) Impact on HUD-assisted projects currently in

processing.

\(iv\) Impact on future HUD program activity. Where a

field office has determined that immediate

approval of new areawide data is necessary and

warranted in limited geographic areas, the request

for approval should state the circumstances

warranting such approval. Actions on proposed

projects shall not be undertaken while new

areawide noise data are being considered for HUD

use except where the proposed location is affected

in the same manner under both the old and new

noise data.

\(b\) Site assessments. Compliance with the standards contained in

section 51.103(c) shall, where necessary, be determined using

noise assessment guidelines, handbooks, technical documents and

procedures issued by the Department.

\(c\) Variations in site noise levels. In many instances the noise

environment will vary across a site, with portions of the site

being in an Acceptable noise environment and other portions in a

Normally Unacceptable noise environment. The standards in

section 51.103(c) shall apply to the portions of a building or

buildings used for residential purposes and for ancillary noise

sensitive open spaces.

\(d\) Noise measurements. Where noise assessments result in a finding

that the site is borderline or questionable, or is controversial,

noise measurements may be performed. Where it is determined that

noise measurements are required, such measurements will be

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conducted in accordance with methods and measurement criteria

established by the Department. Locations for noise measurements

will depend on the location of noise sensitive uses that are

nearest to the predominant noise source (see section 51.103(c)).

\(e\) Projections of noise exposure. In addition to assessing existing

exposure, future conditions should be projected. To the extent

possible, noise exposure shall be projected to be representative

of conditions that are expected to exist at a time at least 10

years beyond the date of the project or action under review.

\(f\) Reduction of site noise by use of berms and/or barriers. If it

is determined by adequate analysis that a berm and/or barrier

will reduce noise at a housing site, and if the barrier is

existing or there are assurances that it will be in place prior

to occupancy, the environmental noise analysis for the site may

reflect the benefits afforded by the berm and/or barrier.

In the environmental review process under section 51.104(b), the

location, height and design of the berm and/or barrier shall be

evaluated to determine its effectiveness, and impact on design

and aesthetic quality, circulation and other environmental

factors.

APPENDIX I to Subpart B\--definition of acoustical quantities

1\. Sound level. The quantity in decibels measured with an instrument

satisfying requirements of American National Standard Specification

for Type 1 Sound Level Meters S1.4-1971. Fast time-averaging and

A-frequency weighting are to be used, unless others are specified.

The sound level meter with the A-weighting is progressively less

sensitive to sounds of frequency below 1,000 hertz (cycles per

second), somewhat as is the ear. With fast time averaging the sound

level meter responds particularly to recent sounds almost as quickly

as does the ear in judging the loudness of a sound.

2\. Average Sound Level. Average sound level, in decibels, is the level

of the mean-square A-weighted sound pressure during the stated time

period, with reference to the square of the standard reference sound

pressure of 20 micropascals.

Day-night average sound level, abbreviated as DNL, and symbolized

mathematically as Ldn is defined as:

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Time (t) is in seconds, so the limits shown in hours and minutes are

actually interpreted in seconds. LA(t) is the time varying value of

A-weighted sound level, the quantity in decibels measured by an
instrument

satisfying requirements of American National Standard Specification for

Type 1 Sound Level Meters S1.4-1971.

3\. Loud Impulsive Sounds. When loud impulsive sounds such as sonic
booms

or explosions are anticipated contributors to the noise environment at

a site, the contribution to day-night average sound level produced by

the loud impulsive sounds shall have 8 decibels added to it in

assessing the acceptability of a site.

A loud impulsive sound is defined for the purpose of this regulation

as one for which:

\(i\) The sound is definable as a discrete event wherein the sound

level increases to a maximum and then decreases in a total time

interval of approximately one second or less to the ambient

background level that exists without the sound; and

\(ii\) The maximum sound level (obtained with slow averaging time and

A-weighting of a Type 1 sound level meter whose characteristics

comply with ANSI S1.4-1971) exceeds the sound level prior to the

onset of the event by at least 6 decibels; and

\(iii\) The maximum sound level obtained with fast averaging time of a

sound level meter exceeds the maximum value obtained with slow

averaging time by at least 4 decibels.

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Subpart C

Siting of HUD-Assisted Projects Near Hazardous Operations

Handling Conventional Fuels or Chemicals of an Explosive or

Flammable Nature.

Effective Date: April 2, 1984

Source: Federal Register: February 10, 1984, pp 5100-5108; March 20,

1984; p 10253; March 29, 1984, p 12214

Sec.

51.200 Purpose

51.201 Definitions

51.202 Approval of HUD-Assisted Projects

51.203 Safety Standards

51.204 HUD-Assisted Hazardous Facilities

51.205 Mitigating Measures

51.206 Implementation

51.207 Amendments to Appendix I to this Subpart

51.208 Reservation of Administrative and Legal Rights

Appendix I to Subpart C

Appendix II to Subpart C

Authority: Section 2 Housing Act of 1949 (42 U.S.C. 1441); Section 7(d)

Department of Housing and Urban Development Act (42 U.S.C. 3535(d));

Section 2, Housing and Urban Development Act of 1969 (42 U.S.C.
1441(a)).

51.200 PURPOSE

The Department of Housing and Urban Development finds that it is

necessary to establish standards for the location of proposed
HUD-assisted

projects near hazardous operations handling petroleum products or
chemicals

of an explosive or fire-prone nature in order to minimize the
possibility

of loss of life and substantial property loss from such hazards.

The purpose of this Subpart is to:

\(a\) Establish safety standards which can be used as a basis for

calculating acceptable separation distances (ASD) for HUD-assisted

projects from specific, stationary, hazardous operations which store,

handle, or process hazardous substances;

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\(b\) Alert those responsible for the siting of HUD-assisted projects to
the

inherent potential dangers when such projects are located in the

vicinity of such hazardous operations;

\(c\) Provide guidance for identifying those hazardous operations which
are

most prevalent;

\(d\) Provide the technical guidance required to evaluate the degree of

danger anticipated from explosion and thermal radiation (fire); and

\(e\) Provide technical guidance required to determine acceptable
separation

distances from such hazards.

51.201 DEFINITIONS

Acceptable Separation Distance (ASD) - means the distance beyond which
the

explosion or combustion of a hazard is not likely to cause structures or

individuals to be subjected to blast overpressure or thermal radiation
flux

levels in excess of the safety standards in section 51.203. The ASD is

determined by applying the safety standards established by this subpart
to

the guidance set forth in HUD Guidebook, \"Urban Development Siting With

Respect to Hazardous Commercial/Industrial Facilities.\"

Blast Overpressure - means the pressure, in pounds per square inch, in

excess of normal atmospheric pressure an the surrounding medium caused
by

an explosion.

Danger Zone - means the land area circumscribed by the radius which

delineates the ASD of a given hazard.

Department - means the Department of Housing and Urban Development
(HUD).

Hazard - means any stationary container which stores, handles or
processes

hazardous substances of an explosive or fire prone nature. The term

\"hazard\" does not include pipelines for the transmission of hazardous

substances, if such pipelines are located underground or comply with

applicable Federal, State and local safety standards. Also excepted are:

\(1\) containers with a capacity of 100 gallons or less when they
contain

common liquid industrial fuels, such as gasoline, fuel oil, kerosene and

crude oil since they generally would pose no danger in terms of thermal

radiation or blast overpressure to a project; and (2) facilities which
are

shielded from a proposed HUD-assisted project by the topography, because

these topographic features effectively provide a mitigating measure
already

in place.

Hazardous Substances - means petroleum products (petrochemicals) and

chemicals that can produce blast overpressure or thermal radiation
levels

in excess of the standards set forth in section 51.203. A specific list
of

hazardous substances is found in Appendix 1 to this Subpart.

HUD-Assisted Project - the development, construction, rehabilitation,

modernization or conversion with HUD subsidy, grant assistance, loan,
loan

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guarantee, or mortgage insurance, of any project which is intended for

residential, institutional, recreational, commercial or industrial use.

For purposes of this Subpart the terms \"rehabilitation\" and
\"modernization\"

refer only to such repairs and renovation of a building or buildings as

will result in an increased number of people being exposed to hazardous

operations by increasing residential densities, converting the type of
use

of a building to habitation, or making a vacant building habitable.

Secretary - means the Secretary of Housing and Urban Development.

Thermal Radiation Level - means the emission and propagation of heat
energy

through space or a material medium, expressed in BTU per square foot per

hour (BTU/sq. ft. hr.).

51.202 APPROVAL OF HUD-ASSISTED PROJECTS

\(a\) It is HUD\'s policy that projects receiving HUD assistance will be

located in a safe and healthful environment. The Department will not

approve an application for assistance for a proposed project located

at less than the acceptable separation distance from a hazard, as

defined in section 51.201, unless appropriate mitigating measures, as

defined in section 51.205, are implemented, or unless mitigating

measures are already in place.

\(b\) In the case of all applications for proposed HUD-assisted
projects,

the Department shall evaluate projected development plans in the

vicinity of these projects to determine whether there are plans to

install a hazardous operation in close proximity to the proposed

project. If the evaluation shows that such a plan exists, the

Department shall not approve assistance for the project unless the

Department obtains satisfactory assurances that adequate mitigating

measures will be taken when the hazardous operation is installed.

51.203 SAFETY STANDARDS

The following standards shall be used in determining the acceptable

separation distance of a proposed HUD-assisted project from a hazard:

\(a\) Thermal Radiation Safety Standard. Projects shall be located so
that:

\(1\) The allowable thermal radiation flux level at the building shall

not exceed 10,000 BTU/sq. ft. per hr.;

\(2\) The allowable thermal radiation flux level for outdoor,

unprotected facilities or areas of congregation shall not exceed

450 BTU/sq. ft. per hour.

\(b\) Blast Overpressure Safety Standard. Projects shall be located so
that

the maximum allowable blast overpressure at both buildings and

outdoor, unprotected facilities or areas shall not exceed 0.5 psi.

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\(c\) If a hazardous substance constitutes both a thermal radiation and

blast overpressure hazard, the ASD for each hazard shall be

calculated, and the larger of the two ASDs shall be used to determine

compliance with this Subpart.

51.204 HUD-ASSISTED HAZARDOUS FACILITIES

In reviewing applications for proposed HUD-assisted projects involving

the installation of hazardous facilities, the Department shall ensure
that

such hazardous facilities are located at an acceptable separation
distance

from residences and from any other facility or area where people may

congregate or be present. The mitigating measures listed in section
51.205

may be taken into account in determining compliance with this section.

51.205 MITIGATING MEASURES

Application of the standards for determining an Acceptable Separation

Distance (ASD) for a HUD-assisted project from a potential hazard of an

explosion or fire prone nature is predicated on level topography with no

intervening object(s) between the hazard and the project. Application of

the standards can be eliminated or modified if:

a\. The nature of the topography shields the proposed project from the

hazard.

b\. An existing permanent fire resistant structure of adequate size

and strength will shield the proposed project from the hazard.

c\. A barrier is constructed surrounding the hazard, at the site of

the project, or in between the potential hazard and the proposed

project.

d\. The structure and outdoor areas used by people are designed to

withstand blast overpressure and thermal radiation anticipated

from the potential hazard (e.g., the project is of masonry and

steel or reinforced concrete and steel construction).

51.206 IMPLEMENTATION

This Subpart shall be implemented for each proposed HUD-assisted

project by the Departmental official responsible for Departmental review
of

the project. The implementation procedure will be part of the

environmental assessment process in accordance with the procedures set

forth in 24 CFR Part 50 and 24 CFR Part 58. In the case of HUD-assisted

projects for which the Department\'s Project Selection Criteria at 24
CFR

Section 200.700 et seq. are applicable, the requirements of this Subpart

shall be implemented by the Departmental official responsible for

determining compliance with such criteria.

51.207 AMENDMENTS TO APPENDIX I TO THIS SUBPART

\(a\) The Secretary may prescribe supplementary substances for inclusion
in

Appendix I to this Subpart without prior notice and public procedure.

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Specific notice of these supplementary substances, to include the

reason for including the substances, shall be published in the Federal

Register, in accordance with 5 U.S.C. 552 and 24 CFR 15.11. Such

notice may incorporate these supplementary substances by reference.

In addition, discussion of the basis for including these supplementary

substances will be available for examination and distribution in the

Office of Environment and Energy, Roam 7152, Department of Housing and

Urban Development, 451 Seventh Street, SW, Washington, DC 20410, and

in each HUD Regional and local office.

\(b\) The Secretary or his designee may, on a case-by-case basis, when

circumstances warrant, require the application of this Subpart with

respect to a substance not listed in Appendix I to this Subpart that

would create thermal or overpressure effect in excess of that listed

in section 51.203.

\(c\) Any interested person may petition the Secretary for amendment of

Appendix I to this Subpart in accordance with 24 CFR 10.20.

51.208 RESERVATION OF ADMINISTRATIVE AND LEGAL RIGHTS

Publication of these standards does not constitute a waiver of any

right: (a) of HUD to disapprove a project proposal if the siting is too

close to a potential hazard not covered by this Subpart, and (b) of HUD
or

any person or other entity to seek to abate or to collect damages

occasioned by a nuisance, whether or not covered by the Subpart.

Dated February 1, 1984

Samuel R. Pierce, Jr.

Secretary of Housing and

Urban Development

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APPENDIX I - TO SUBPART C

Specific Hazardous Substances

The following is a list of specific petroleum products and chemicals

defined to be hazardous substances under section 51.201.

HAZARDOUS LIQUIDS

Acetic Acid Crude oil (Petroleum) Isobutyl Alcohol

Acetic Anhydride Cumene Isopropyl Acetate

Acetone Cyclohexane Isopropyl Alcohol

Acrylonitrile No. 2 Diesel Fuel Jet Fuel & Kerosene

Amyl Acetate Ethyl Acetate Methyl Alcohol

Amyl Alcohol Ethyl Acrylate Methyl Amyl Alcohol

Benzene Ethyl Alcohol Methyl Cellosolve

Butyl Acetate Ethyl Benzene Methyl Ethyl Ketone

Butyl Acrylate Ethyl Dichloride Naptha

Butyl Alcohol Ethyl Ether Pentane

Carbon Bisulfide Gasoline Propylene Oxide

Carbon Disulfide Heptane Toluene

Cellosolve Hexane Vinyl Acetate

Cresols Isobutyl Acetate Xylene

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HAZARDOUS GASES

Acetaldehyde Ethylene Liquefied Petroleum Gas (LPG)

Butadiene Ethylene oxide Propane

Butane Hydrogen Propylene

Ethene Liquefied Natural Gas (LNG) Vinyl Chloride

(Primary Source: \"Urban Development Siting with respect to Hazardous

Commercial/Industrial Facilities,\" by Rolf Jensen and Associates, Inc.,

April 1982)

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APPENDIX II - TO SUBPART C

Development of Standards; Calculation Methods

I. Background Information Concerning the Standards:

\(a\) Thermal Radiation

\(1\) Introduction. Flammable products stored in above ground

containers represent a definite, potential threat to human

life and structures in the event of fire. The resulting

fireball emits thermal radiation which is absorbed by the

surroundings. Combustible structures, such as wooden houses,

may be ignited by the thermal radiation being emitted. The

radiation can cause severe burn, injuries and even death to

exposed persons some distance away from the site of the fire.

\(2\) Criteria for Acceptable Separation Distance (ASD). Wooden

buildings, window drapes and trees generally ignite

spontaneously when exposed for a relatively long period of

time to thermal radiation levels of approximately 10,000

BTU/hr. sq. ft. It will take 15 to 20 minutes for a building

to ignite at that degree of thermal intensity. Since the

reasonable response time for fire fighting units in urbanized

areas is approximately five to ten minutes, a standard of

10,000 BTU/hr. sq. ft. is considered an acceptable level of

thermal radiation for buildings.

People in outdoor areas exposed to a thermal radiation flux

level of approximately 1,500 BTU/sq. ft. hr will suffer

intolerable pain after 15 seconds. Longer exposure causes

blistering, permanent skin damage, and even death. Since it

is assumed that children and the elderly could not take

refuge behind walls or run away from the thermal effect of

the fire within the 15 seconds before skin blistering occurs,

unprotected (outdoor) areas, such as playgrounds, parks,

yards, school grounds, etc., must be placed at such a

distance from potential fire locations so that the radiation

flux level is well below 1500 BTU/sq. ft. hr. An acceptable

flux level, particularly for elderly people and children, is

450 BTU/sq. ft. hr. The skin can be exposed to this degree

of thermal radiation for 3 minutes or longer with no serious

detrimental effect. The result would be the same as a bad

sunburn. Therefore, the standard for areas in which there

will be exposed people, e.g. outdoor recreation areas such as

playgrounds and parks, is set at 450 BTU/hr. sq. ft. Areas

covered also include open space ancillary to residential

structures, such as yard areas and vehicle parking areas.

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\(3\) Acceptable Separation Distance From a Potential Fire Hazard.

This is the actual setback required for the safety of occupied

buildings and their inhabitants, and people in open spaces

(exposed areas) from a potential fire hazard. The specific

distance required for safety from such a hazard depends upon

the nature and the volume of the substance. The Technical

Guidebook entitled \"Urban Development Siting With Respect to

Hazardous/Commercial Industrial Facilities,\" which

supplements this regulation, contains the technical guidance

required to compute Acceptable Separation Distances (ASD) for

those flammable substances most often encountered.

\(b\) Blast Overpressure

The Acceptable Separation Distance (ASD) for people and structures

from materials prone to explosion is dependent upon the resultant

blast measured in pounds per square inch (psi) overpressure. It

has been determined by the military and corroborated by two

independent studies conducted for the Department of Housing and

Urban Development that 0.5 psi is the acceptable level of blast

overpressure for both buildings and occupants, because a frame

structure can normally withstand that level of external exertion

with no serious structural damage, and it is unlikely that human

beings inside the building would normally suffer any serious

injury. Using this as the safety standard for blast overpressure,

nomographs have been developed from which an ASD can be determined

for a given quantify of hazardous substance. These nomographs are

contained in the handbook with detailed instructions on their use.

\(c\) Hazard evaluation

The Acceptable Separation Distances for buildings, which are

determined for thermal radiation and blast overpressure, delineate

separate identifiable danger zones for each potential accident

source. For some materials the fire danger zone will have the

greatest radius and cover the largest area, while for others the

explosion danger zone will be the greatest. For example,

conventional petroleum fuel products stored in unpressurized tanks

do not emit blast overpressure of dangerous levels when ignited.

In most cases, hazardous substances will be stored in pressurized

containers. The resulting blast overpressure will be experienced

at a greater distance than the resulting thermal radiation for the

standards set in section 51.203. In any event the hazard requiring

the greatest separation distance will prevail in determining the

location of HUD-assisted projects.

The standards developed for the protection of people and property

are given in the following table.

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THERMAL RADIATION BLAST OVERPRESSURE

Amount of acceptable

exposure allowed for

building structures 10,000 BTU/sq. ft. hr 0.5 psi

Amount of acceptable

exposure allowed for

people in open areas 450 BTU/sq. ft. hr 0.5 psi

Problem Example:

The following example is given as a guide to assist in understanding

how the procedures are used to determine an acceptable separation
distance.

The technical data are found in the HUD Guidebook. Liquid propane is
used

in the example since it is both an explosion and a fire hazard.

In this hypothetical case a proposed housing project is to be located

850 feet from a 30,000 gallon liquid propane (LPG) tank. The objective
is

to determine the acceptable separation distance from the LPG tank. Since

propane is both explosive and fire prone it will be necessary to
determine

the ASD for both explosion and for fire. The greatest of the two will

govern. There is no dike around the tank in this example.

Nomographs from the technical Guidebook have been reproduced to

facilitate the solving of the problem.

ASD For Explosion:

Use Figure 1 to determine the acceptable separation distance for

explosion.

The graph depicted on Figure 1 is predicated on a blast overpressure of

0.5 psi.

The ASD in feet can be determined by applying the quantity of the

hazard (in gallons) to the graph.

In this case locate the 30,000 gallon point on the horizontal axis and

draw a vertical line from that point to the intersection with the
straight

line curve. Then draw a horizontal line from the point where the lines

cross to the left vertical axis where the ACCEPTABLE SEPARATION DISTANCE
of

660 feet is found.

Therefore the ASD for explosion is 660 feet.

Since the proposed project site is located 850 feet from the tank it is

located at a safe distance with regards to blast overpressure.

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ACCEPTABLE SEPARATION DISTANCE

BLAST OVERPRESSURE

(NO BLAST BARRIERS)

HAZARDOUS GAS CONTAINER

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Figure 1

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ASD For Fire:

To determine the ASD for fire it will be necessary to first find the

fire width (diameter of the fireball) on Figure 2. Then apply this to

Figure 3 to determine the ASD.

Since there are two safety standards for fire: (a) 10,000 BTU/sq. ft.

hr. for buildings; and (b) 450 BTU/sq. ft. hr. for people in exposed
areas,

it will be necessary to determine an ASD for each.

To determine the fire width locate the 30,000 gallon point on the

horizontal axis on Figure 2 and draw a vertical line to the straight
line

curve. Then draw a horizontal line from the point where the lines cross
to

the left vertical axis where the FIRE WIDTH is found to be 350 feet.

Now locate the 350 ft. point on the horizontal axis of Figure 3 and draw

a vertical line from that point to curves 1 and 2. Then draw horizontal

lines from the points where the lines cross to the left vertical axis
where

the ACCEPTABLE SEPARATION DISTANCES of 240 feet for buildings and 1150
feet

for exposure to people is found.

Based on this the proposed project site is located at a safe distance

from a potential fire ball. However, exposed playgrounds or other
exposed

areas of congregation must be at least 1150 feet from the tank, or be

appropriately shielded from a potential fireball.

(Source: HUD Handbook, \"Urban Development Siting With Respect to
Hazardous

Commercial/Industrial Facilities.\")

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FIRE WIDTH - UNCONFINED SPILL

HAZARDOUS GAS CONTAINER

NOT DIKED

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Figure 2

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ACCEPTABLE SEPARATION DISTANCE

HAZARDOUS GAS CONTAINER

DIKED/UNDIKED

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Figure 3

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Subpart D

Siting of HUD Assisted Projects in Runway Clear Zones

at Civil Airports and Clear Zones and

Accident Potential Zones at Military Airfields

EFFECTIVE DATE: March 5, 1984

SOURCE: Federal Register: January 6, 1984; pp. 877-881

51.300 Purpose

51.301 Definitions

51.302 Coverage

51.303 General Policy

51.304 Responsibilities

51.305 Implementation

Authority: Section 2 of the Housing Act of 1949 as amended, 42 U.S.C.

1441, affirmed by Section 2 of the Housing and Urban Development Act of

1969, P.L. No. 90-448; Section 7(d) of the Department of Housing and
Urban

Development Act of 1965, 42 U.S.C. 3535(d); Office of Management and

Budget, Federal Management Circular 75-2: Compatible Land Uses At
Federal

Airfields.

51.300 PURPOSE

\(a\) The Department of Housing and Urban Development finds that HUD

assisted or insured projects and their occupants in Runway Clear

Zones, Clear Zones and Accident Potential Zones are exposed to a

significant risk of personal injury or property damage from aircraft

accidents.

\(b\) It is the purpose of this Subpart to promote compatible land uses

around civil airports and military airfields by identifying suitable

land uses for Runway Clear Zones at civil airports and Clear Zones and

Accident Potential Zones at military airfields and by establishing

them as standards for providing HUD assistance, subsidy or insurance.

51.301 DEFINITIONS: For the purposes of this regulation, the following

definitions apply:

\(a\) Accident Potential Zone. An area at military airfields which is

beyond the Clear Zone. The standards for the Accident Potential Zones

are set out in Department of Defense Instruction 4165.57, \"Air

Installations Compatible Use Zones,\" November 8, 1977, 32 CFR Part

256\. There are no Accident Potential Zones at civil airports.

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\(b\) Airport Operator. The civilian or military agency, group or

individual which exercises control over the operations of the civil

airport or military airfield.

\(c\) Civil Airport. An existing commercial service airport as
designated

in the National Plan of Integrated Airport Systems prepared by the

Federal Aviation Administration in accordance with Section 504 of the

Airport and Airway Improvement Act of 1982.

\(d\) Runway Clear Zones and Clear Zones. Areas immediately beyond the
ends

of a runway. The standards for Runway Clear Zones for civil airports

are established by FAA regulation 14 CFR Part 152. The standards for

Clear Zones for military airfields are established by DOD Instruction

4165.57, 32 CFR Part 256.

51.302 COVERAGE:

\(a\) These policies apply to HUD programs which provide assistance,
subsidy

or insurance for construction, land development, new communities,

community development or redevelopment or any other provision of

facilities and services which are designed to make land available for

construction. When the HUD assistance, subsidy or insurance is used

to make land available for construction rather than for the actual

construction, the provision of the HUD assistance, subsidy or

insurance shall be dependent upon whether the facility to be built is

itself acceptable in accordance with the standards in section 51.303.

\(b\) These policies apply not only to new construction but also to

substantial or major modernization and rehabilitation and to any other

program which significantly prolongs the physical or economic life of

existing facilities or which, in the case of Accident Potential Zones:

\(1\) Changes the use of the facility so that it becomes one which is no

longer acceptable in accordance with the standards contained in

section 51.303(b);

\(2\) Significantly increases the density or number of people at the

site; or

\(3\) Introduces explosive, flammable or toxic materials to the area.

\(c\) Except as noted in section 51.303(a)(3), these policies do not
apply

to HUD programs where the action only involves the purchase, sale or

rental of an existing property without significantly prolonging the

physical or economic life of the property.

\(d\) The policies do not apply to research or demonstration projects
which

do not result in new construction or reconstruction, to interstate

land sales registration, or to any action or emergency assistance

which is provided to save lives, protect property, protect public

health and safety, or remove debris and wreckage.

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51.303 GENERAL POLICY: It is HUD\'s general policy to apply standards to

prevent incompatible development around civil airports and military

airfields.

\(a\) HUD policy for actions in Runway Clear Zones and Clear Zones.

\(1\) HUD policy is not to provide any assistance, subsidy or insurance

for projects and actions covered by this part except as stated in

section 51.303 (a)(2) below.

\(2\) If a project proposed for HUD assistance, subsidy or insurance is

one which will not be frequently used or occupied by people, HUD

policy is to provide assistance, subsidy or insurance only when

written assurances are provided to HUD by the airport operator to

the effect that there are no plans to purchase the land involved

with such facilities as part of a Runway Clear Zone or Clear Zone

acquisition program.

\(3\) Special notification requirements for Runway Clear Zones and Clear

Zones. In all cases involving HUD assistance, subsidy, or

insurance for the purchase or sale of an existing property in a

Runway Clear Zone or Clear Zone, HUD (or the Grant Recipient under

Title I of the Housing and Community Development Act of 1974, as

amended, 42 U.S.C. 5301 et seq.) shall advise the buyer that the

property is in a Runway Clear Zone or Clear Zone, what the

implications of such a location are, and that there is a

possibility that the property may, at a later date, be acquired by

the airport operator. The buyer must sign a statement

acknowledging receipt of this information.

\(b\) HUD policy for actions in Accident Potential Zones at Military

Airfields.

HUD policy is to discourage the provision of any assistance, subsidy

or insurance for projects and actions in the Accident Potential Zones.

To be approved, projects must be generally consistent with the

recommendations in the Land Use Compatibility Guidelines For Accident

Potential Zones chart contained in DOD Instruction 4165.57, 32 CFR

Part 256.

51.304 RESPONSIBILITIES

\(a\) The following persons have the authority to approve actions in

Accident Potential Zones:

\(1\) For Title I of the Housing and Community Development Act of 1974,

as amended, 42 U.S.C. 5301 et seq: the certifying officer of the

grant recipient as defined in Part 58 of this Title.

\(2\) For all other HUD programs: the program personnel having approval

authority for the project.

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\(b\) The following persons have the authority to approve actions in
Runway

Clear Zones and Clear Zones:

\(1\) For Title I of the Housing and Community Development Act of 1974,

as amended, 42 U.S.C. 5301 et seq: The certifying officer of the

grant recipient as defined in Part 58 of this Title.

\(2\) For all other HUD programs: the Regional Administrator.

51.305 IMPLEMENTATION

\(a\) Projects already approved for assistance. This regulation does not

apply to any project approved for assistance prior to the effective

date of the regulation whether the project was actually under

construction at that date or not.

\(b\) Acceptable data on Runway Clear Zones, Clear Zones and Accident

Potential Zones. The only Runway Clear Zones, Clear Zones and

Accident Potential Zones which will be recognized in applying this

part are those provided by the airport operators and which for civil

airports are defined in accordance with FAA regulations 14 CFR Part

152 or for military airfields, DOD Instruction 4165.57, 32 CFR Part

256\. All data, including changes, related to the dimensions of Runway

Clear Zones for civil airports shall be verified with the nearest FAA

Airports District Office before use by HUD.

\(c\) Changes in Runway Clear Zones, Clear Zones, and Accident Potential

Zones. If changes in the Runway Clear Zones, Clear Zones or Accident

Potential Zones are made, the field offices shall immediately adopt

these revised zones for use in reviewing proposed projects.

\(d\) The decision to approve projects in the Runway Clear Zones, Clear

Zones and Accident Potential Zones must be documented as part of the

environmental assessment or, when no assessment is required, as part

of the project file.

Dated: December 30, 1983

Samuel R. Pierce, Jr.

Secretary of Housing and

Urban Development

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ATTACHMENT 1

SELECTIONS FROM DEPARTMENT OF DEFENSE INSTRUCTION 4165.57, NOVEMBER 8,

1977: AIR INSTALLATIONS COMPATIBLE USE ZONES

1\. DEFINITIONS OF CLEAR ZONES AND ACCIDENT POTENTIAL ZONES FOR MILITARY

AIRFIELDS

2\. LAND USE COMPATIBILITY GUIDELINES FOR ACCIDENT POTENTIAL ZONES

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From: DODI 4165.57: Air Installation Compatible Use Zones

3\. Accident Potential

a\. General

\(1\) Areas immediately beyond the ends of runways and along

primary flight paths are subject to more aircraft accidents than other

areas. For this reason, these areas should remain undeveloped, or if

developed should be only sparsely developed in order to limit, as much
as

possible, the adverse effects of a possible aircraft accident.

\(2\) DOD fixed wing runways are separated into two types for

the purpose of defining accident potential areas. Class A runways are

those restricted to light aircraft and which do not have the potential
for

development for heavy or high performance aircraft use or for which no

foreseeable requirements for such use exists. Typically these runways
have

less than 10 percent of their operations involving Class B aircraft and
are

less than 8000 feet long. Class B runways are all other fixed wing

runways.

\(3\) The following descriptions of Accident Potential Zones

are guidelines only. Their strict application would result in increasing

the safety of the general public but would not provide complete
protection

against the effects of aircraft accidents. Such a degree of protection
is

probably impossible to achieve. Local situations may differ
significantly

from the assumptions and data upon which these guidelines are based and

require individual study. Where it is desirable to restrict the density
of

development of an area, it is not usually possible to state that one

density is safe and another is not. Safety is a relative term and the

objective should be the realization of the greatest degree of safety
that

can be reasonably attained.

b\. Accident Potential and Clear Zones

\(1\) The area immediately beyond the end of a runway is the

\"Clear Zone,\" an area which possesses a high potential for accidents,
and

has traditionally been acquired by the Government in fee and kept clear
of

obstructions to flight.

\(2\) Accident Potential Zone I (APZ I) is the area beyond

the clear zone which possesses a significant potential for accidents.

\(3\) Accident Potential Zone II (APZ II) is an area beyond

APZ I having a measurable potential for accidents.

\(4\) Modifications to APZs I and II will be considered if:

\(a\) The runway is infrequently used.

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\(b\) The prevailing wind conditions are such that a

large percentage (i.e., over 80 percent) of the operations are in one

direction.

\(c\) Most aircraft do not overfly the APZs as defined

herein during normal flight operations (modifications may be made to
alter

these zones and adjust them to conform to the line of flight).

\(d\) Local accident history indicates consideration of

different area.

\(e\) Other unusual conditions exist.

\(5\) The takeoff safety zone for VFR rotary-wing facilities

will be used for the clear zone; the remainder of the approach-departure

zone will be used as APZ I.

\(6\) Land use compatibility with clear zones and APZs is

shown in enclosure 4.

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Land Use Compatibility Guidelines for Accident Potential

Zones

Land Use Category Compatibility /1

Clear Zone APZ I APZ II

Residential

Single family NO NO YES /2

2-4 family NO NO NO

Multi-family dwellings NO NO NO

Group quarters NO NO NO

Residential hotels NO NO NO

Mobile home parks or courts NO NO NO

Other residential NO NO NO

Industrial/Manufacturing /3

Food and kindred products NO NO YES

Textile mill products NO NO YES

Apparel NO NO NO

Lumber and wood products NO YES YES

Furniture and Fixtures NO YES YES

Paper and Allied Products NO YES YES

Printing, publishing NO YES YES

Chemicals and allied products NO NO NO

Petroleum refining and related industries NO NO NO

Rubber and misc. plastic goods NO NO NO

4-39

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Land Use Category Compatibility /1

Clear Zone APZ-I APZ II

Industrial/Manufacturing /3 (Cont.)

Primary metal industries NO YES YES

Fabricated metal products NO YES YES

Professional, scientific and controlling

instruments NO NO NO

Misc. manufacturing NO YES YES

Transportation, Communications & Utilities /4

Railroad, rapid rail transit (on-grade) NO YES /4 YES

Highway and street right-of-way YES YES YES

Auto parking NO YES YES

Communication YES YES YES

Utilities YES YES /4 YES

Other transportation, communications & utilities YES YES YES

Commercial/Retail Trade

Wholesale trade NO YES YES

Building materials-retail NO YES YES

General merchandise-retail NO NO YES

Food-retail NO NO YES

Automotive, marine, aviation-retail NO YES YES

Apparel and accessories-retail NO NO YES

Furniture, home furnishings-retail NO NO YES

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Land Use Category Compatibility /1

Clear Zone APZ-I APZ II

Commercial/Retail Trade (Cont.)

Eating and drinking places NO NO NO

Other retail trade NO NO YES

Personal and Business Services /5

Finance, insurance and real estate NO NO YES

Personal services NO NO YES

Business services NO NO YES

Repair services NO YES YES

Professional services NO NO YES

Contract construction services NO YES YES

Indoor recreation services NO NO YES

Other services NO NO YES

Public and Quasi-Public Services

Government services NO NO YES /5

Educational services NO NO NO

Cultural activities NO NO NO

Medical and other health services NO NO NO

Cemeteries NO YES /6 YES /6

Non-profit organizations including churches NO NO NO

Other public and quasi-public services NO NO YES

Outdoor Recreation

Playground and neighborhood parks NO NO YES

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Land Use Category Compatibility /1

Clear Zone APZ-I APZ II

Outdoor Recreation (Cont.)

Community and regional parks NO YES /7 YES /7

Nature exhibits NO YES YES

Spectator sports incl. arenas NO NO NO

Golf courses /8, riding stables /9 NO YES YES

Water based recreational areas NO YES YES

Resort and group camps NO NO NO

Entertainment assembly NO NO NO

Other outdoor recreation NO YES /7 YES

Resource Production & Extraction and Open Land

Agriculture /10 YES YES YES

Livestock farming, animal breeding /11 NO YES YES

Forestry activities /12 NO /13 YES YES

Fishing activities and related services /14 NO /15 YES /14 YES

Mining activities NO YES YES

Permanent open space YES YES YES

Water areas /14 YES YES YES

Footnotes

1\. A \"Yes\" or \"No\" designation for compatible land use is to be
used

only for gross comparison. Within each, uses exist where further

definition may be needed as to whether it is clearly or normally

acceptable/unacceptable owing to variations in densities of people and

structures.

2\. Suggested maximum density 1-2 DU/AC, possibly increased under a

Planned Unit Development where maximum lot coverage less than 20%.

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3\. Factors to be considered: Labor intensity, structural coverage,

explosive characteristics, air pollution.

4\. No passenger terminals and no major above ground transmission

lines in APZ I.

5\. Low intensity office uses only. Meeting places, auditoriums,

etc., not recommended.

6\. Excludes chapels.

7\. Facilities must be low intensity.

8\. Clubhouse not recommended.

9\. Concentrated rings with large classes not recommended.

10\. Includes livestock grazing but excludes feedlots and intensive

animal husbandry.

11\. Includes feedlots and intensive animal husbandry.

12\. No structures (except airfield lighting), buildings or above

ground utility/communication lines should be located in the clear zone.

For further runway safety clearance limitations pertaining to the clear

zone see AFM 86-6 (reference (a)), TM 5-803-4 (reference (d)) and NAVFAC

P-80 (reference (c)).

13\. Lumber and timber products removed due to establishment,

expansion or maintenance of clear zones will be disposed of in
accordance

with DOD Instruction 4170.7, \"Natural Resources - Forest Management,\"

June 21, 1965 (reference (h)) and DOD Instruction 7310.1, \"Accounting
and

Reporting for Property Disposal and Proceeds from Sale of Disposable

Personal Property and Lumber or Timber Products,\" July 10, 1970

(reference (i)).

14\. Includes hunting and fishing.

15\. Controlled hunting and fishing may be permitted for the purpose

of wildlife control.

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ATTACHMENT 2

DESIGNATED COMMERCIAL SERVICE AIRPORTS COVERED BY 24 CFR PART 51D

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Designated Commercial Service Airports Covered By

24 CFR Part 51D

As of January 1, 1984

AIRPORT

REGION I LOCATION AIRPORT NAME

CT Bridgeport Igor I. Sikorsky Memorial

Groton Groton-New London

New Haven Tweed-New Haven

Windsor Locks Bradley International\*

MA Boston General Edward Lawrence Logan

International\*

Hyannis Barnstable Municipal

Marthas Vineyard Marthas Vineyard

Nantucket Nantucket Memorial

New Bedford New Bedford Municipal

Pittsfield Pittsfield Municipal

Provincetown Provincetown Municipal

Worcester Worcester Municipal

ME Auburn-Lewiston Auburn-Lewiston Municipal

Augusta Augusta-State

Bangor Bangor International\*

Bar Harbor Bar Harbor

Frenchville Northern Aroostook Regional

Portland Portland International Jetport\*

Presque Isle Northern Maine Regional

Rockland Knox County Regional

Waterville Waterville-Robert Lafleur

NH Keene Dillant-Hopkins

Laconia Laconia Municipal

Lebanon Lebanon Municipal

Manchester Manchester Municipal

RI Providence Theodore F. Green State\*

Westerly Westerly State

VT Barre-Montpelier Edward F. Knapp State

Burlington Burlington International\*

Rutland Rutland State

\*Airports with 100,000 + enplanements per year

4-45

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AIRPORT

REGION II LOCATION AIRPORT NAME

NJ Atlantic City NAFEC Atlantic City

Atlantic City Atlantic City Municipal/Bader Field

Belmar Monmouth Airport

Newark Newark International Airport\*

Wildwood Cape May County Airport

NY Albany Albany County\*

Binghamton Broome County Airport\*

Buffalo Greater Buffalo International

Elmira Chemung County Airport

Islip Long Island - Mac Arthur\*

Ithaca Tompkins County Airport

Jamestown Chautauqua County

Massena Richards Field

New York John F. Kennedy International\*

New York Laguardia\*

Ogdensburg Ogdensburg International

Oneonta Oneonta Municipal

Plattsburgh Clinton County

Poughkeepsie Dutchess County

Rochester Rochester Monroe County\*

Saranac Lake Adirondack

Syracuse Syracuse-Hancock International\*

Utica Oneida County

White Plains Westchester County

New York W.T.C.-Battery Park Heliport

PR Fajardo Fajardo

Humacao Humacao

Isla De Vieques Vieques

Isla De Culebra Culebra

Mayaguez Mayaguez

Ponce Mercedita

San Juan Isla Grande

San Juan Puerto Rico International\*

Fajardo Fajardo Harbor Seaplane Base

REGION III

DC Washington Dulles International\*

Washington Washington National\*

DE Wilmington Greater Wilmington

MD Baltimore Baltimore-Washington International\*

Cumberland Cumberland Municipal

Hagerstown Hagerstown Regional

Salisbury Salisbury Wicomico County

\*Airports with 100,000 + enplanements per year

4-46

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AIRPORT

REGION III LOCATION AIRPORT NAME

PA Allentown Allentown-Bethlehem-Easton\*

Bradford Bradford Regional

Du Bois Du Bois-Jefferson County

Erie Erie International\*

Franklin Chess-Lamberton

Johnstown Johnstown-Cambria County

Lancaster Lancaster

Latrobe Westmoreland County

Altoona Altoona-Blair County

Middletown Harrisburg International\*

Philadelphia Northeast Philadelphia\*

Philadelphia Philadelphia International\*

Ambler Wings Field

Pittsburgh Greater Pittsburgh International\*

Reading Reading Muni,

General Carl A. Spaatz Fld.

State College University Park

Wilkes-Barre/Scranton Wilkes-Barre/Scranton\*

Williamsport Williamsport-Lycoming County

VA Charlottesville Charlottesville-Albermarle

Lynchburg Lynchburg Municipal

-Preston Glenn Field

Newport News Patrick Henry International\*

Norfolk Norfolk International\*

Richmond Richard Evelyn Bird International\*

Roanoke Roanoke Municipal\*

Staunton/Harrisonburg Shenandoah Valley

WV Beckley Raleigh County

Bluefield Mercer County

Charleston Kanawha\*

Clarksburg Benedum

Elkins Elkins-Randolph Co

\- Jennings Randolph Fld.

Huntington Tri-State/Walker-Long Field

Lewisburg Greenbrier Valley

Morgantown Morgantown Muni

-Walter L. Bill Hart Fld.

Parkersburg Wood County

REGION IV

AL Anniston Anniston-Calhoun County

Auburn Auburn-Opelika

Birmingham Birmingham Municipal\*

Dothan Dothan Municipal

Gadsden Gadsden Municipal

Huntsville Huntsville-Madison Co Jetport\*

Mobile Bates Field\*

Montgomery Dannelly Field\*

Muscle Shoals Muscle Shoals

Tuscaloosa Tuscaloosa Municipal

\*Airports with 100,000 + enplanements per year

4-47

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AIRPORT

REGION IV LOCATION AIRPORT NAME

FL Daytona Beach Daytona Beach Regional\*

Fort Lauderdale Fort Lauderdale

\- Hollywood International\*

Fort Myers Page Field\*

Gainesville Gainesville Regional\*

Jacksonville Jacksonville International\*

Key West Key West International

Marathon Marathon Flight Strip

Melbourne Melbourne Regional Airport\*

Miami Miami International\*

Naples Naples Municipal\*

Ocala Ocala Municipal/Jim Taylor Field

Orlando Orlando International\*

Panama City Panama City-Bay County

Pensacola Pensacola Regional\*

Punta Gorda Charlotte County

Sarasota Sarasota-Bradenton\*

St. Petersburg St. Petersburg

Clearwater International

Tallahassee Tallahassee Municipal\*

Tampa Tampa International\*

Valparaiso Eglin Air Force Base\*

Vero Beach Vero Beach Municipal

West Palm Beach Palm Beach International\*

Marco Island Marco Island

Miami Chalk Seaplane Base

GA Albany Albany-Dougherty County

Athens Athens Municipal

Atlanta William B. Hartsfield

\- Atlanta Intl.\*

Augusta Bush Field\*

Brunswick Glynco Jetport

Columbus Columbus Metropolitan

Macon Lewis B. Wilson

Savannah Savannah Municipal\*

Valdosta Valdosta Municipal

KY Covington Greater Cincinnati International\*

Lexington Blue Grass Field\*

Louisville Standiford Field\*

Owensboro Owensboro-Daviess County

Paducah Barkley Field

MS Columbus-Starkville

\- West Point Golden Triangle Regional

Greenville Greenville Municipal

Gulfport-Biloxi Gulfport-Biloxi Regional

Jackson Allen C. Thompson Field\*

Laurel-Hattiesburg Pine Belt Regional

Meridian Key Field

Tupelo C. D. Lemons Municipal

\*Airports with 100,000 + enplanements per year

4-48

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AIRPORT

REGION IV LOCATION AIRPORT NAME

NC Asheville Asheville Regional\*

Charlotte Douglas Municipal\*

Fayetteville Fayetteville Municipal/

Grannis Field\*

Greensboro Greensboro-High Point

\- Winston Salem\*

Greenville Pitt-Greenville

Hickory Hickory Municipal

Jacksonville Albert J. Ellis

Kinston Eastern Regional Jetport at Stallin

New Bern Simmons-Nott

Raleigh Raleigh-Durham\*

Wilmington New Hanover County

Winston-Salem Smith Reynolds

SC Charleston Charleston AFB/International\*

Columbia Columbia Metropolitan\*

Florence Florence City-County\*

Greer Greenville-Spartanburg\*

Myrtle Beach Myrtle Beach Air Force Base

TN Bristol Tri-City\*

Chattanooga Lovell Field\*

Jackson McKellar Field

Knoxville McGhee-Tyson\*

Memphis Memphis International\*

Nashville Nashville Metropolitan\*

REGION V

IL Bloomington Bloomington-Normal

Carbondale Southern Illinois Airport

Champaign/Urbana University of Illinois-Willard

Chicago Chicago-O\'Hare International\*

Chicago Chicago Midway\*

Chicago Merrill C. Meigs

Danville Vermilion County

Decatur Decatur

Galesburg Galesburg Municipal

Marion Williamson County

Mattoon-Charleston Coles County Memorial

Moline Quad-City\*

Mount Vernon Mt. Vernon-Outland

Peoria Greater Peoria\*

Quincy Quincy Municipal-Baldwin Field

Rockford Greater Rockford

Springfield Capital\*

Sterling Rockfalls Whiteside Co Arpt

-Jos H. Bittorf Field

\*Airports with 100,000 + enplanements per year

4-49

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AIRPORT

REGION V LOCATION AIRPORT NAME

IN Bloomington Monroe County

Elkhart Elkhart Municipal

Evansville Evansville Dress Regional\*

Fort Wayne Fort Wayne Municipal/Baer Field\*

Indianapolis Indianapolis International\*

Lafayette Purdue University

Muncie Delaware County

South Bend Michiana Regional\*

Terre Haute Hulman Field

MI Alpena Phelps Collins

Battle Creek W. K. Kellogg Regional

Benton Harbor Ross Field

Detroit Detroit Metropolitan-Wayne County\*

Detroit Detroit City

Escanaba Delta County

Flint Bishop\*

Grand Rapids Kent County\*

Hancock Houghton County Memorial

Iron Mountain/Kingsford Ford

Ironwood Gogebic County

Jackson Jackson County Reynolds Field

Kalamazoo Kalamazoo Municipal\*

Lansing Capital City\*

Marquette Marquette County

Menominee Menominee-Marinette Twin County

Muskegon Muskegon County

Pellston Emmet County

Saginaw Tri-City\*

Traverse City Cherry Capital

Sault Ste. Marie Chippewa County International

MN Bemidji Emidji-Beltrami Co.

Brainerd Brainerd-Crow Wing County

Duluth Duluth International\*

Fairmont Fairmont Municipal

Grand Rapids Grand Rapids-Itasca County

Hibbing Chisholm-Bibbing

International Falls Falls International

Mankato Mankato Municipal

Minneapolis Minneapolis-St. Paul International\*

Rochester Rochester Municipal\*

Thief River Falls Thief River Falls Regional

OH Akron Akron-Canton Regional\*

Cleveland Burke Lakefront

Cleveland Cleveland-Hopkins International\*

Columbus Port Columbus International\*

\*Airports with 100,000 + enplanements per year

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AIRPORT

REGION V LOCATION AIRPORT NAME

OH Dayton James M. Cox Dayton International\*

Mansfield Mansfield Lahm Municipal

Port Clinton Arl R. Keller Field

Toledo Toledo Express\*

Youngstown Youngstown Municipal

WI Appleton Outagamie County

Eau Claire Eau Claire Municipal

Green Bay Austin-Straubel Field\*

Hayward Hayward Municipal

Janesville Rock County

La Crosse La Crosse Municipal

Madison Dane County Regional\*

Manitowoc Manitowoc Municipal

Marshfield Marshfield Municipal

Milwaukee General Mitchell Field\*

Mosinee Central Wisconsin\*

Oshkosh Wittman Field

Rhinelander Rhinelander-Oneida County

Sheboygan Sheboygan County Memorial

Wisconsin Rapids Alexander Field

REGION VI

AR Camden Harrell Field

El Dorado Goodwin Field

Fayetteville Drake Field\*

Fort Smith Fort Smith Municipal

Harrison Boone County

Hot Springs Memorial Field

Jonesboro Jonesboro Municipal

Little Rock Adams Field\*

Mountain Home Baxter County Regional

Texarkana Texarkana Municipal-Webb Field

LA Alexandria Esler Regional

Baton Rouge Baton Rouge Metropolitan,

Ryan Field\*

Houma Houma-Trerrebonne

Lafayette Lafayette Regional

Lake Charles Lake Charles Municipal

Monroe Monroe Regional\*

New Orleans New Orleans International

(Moisant)\*

New Orleans Lakefront

Patterson Harry P. Williams Memorial

Shreveport Shreveport Regional\*

\*Airports with 100,000 + enplanements per year

4-51

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AIRPORT

REGION VI LOCATION AIRPORT NAME

NM Alamogordo Alamogordo-White Sands Regional

Albuquerque Albuquerque International\*

Carlsbad Cavern City Air Terminal

Clovis Clovis Municipal

Farmington Farmington Municipal

Gallup Gallup Municipal

Hobbs Lea County (Hobbs)

Roswell Roswell Industrial Air Center

Santa Fe Santa Fe County Municipal

Silver City Silver City-Grant County Airport

Los Alamos Los Alamos

OK Lawton Lawton Municipal

Oklahoma City Will Rogers World Airport\*

Stillwater Stillwater Municipal

Tulsa Tulsa International\*

TX Abilene Abilene Municipal

Amarillo Amarillo International\*

Austin Robert Mueller Municipal\*

Beaumont/Port Arthur Jefferson County\*

Brownsville Brownsville/

South Padre Island Intl.

Brownwood Brownwood Municipal

College Station Easterwood Field

Corpus Christi Corpus Christi International\*

Dallas Dallas Love Field\*

Dallas-Ft. Worth Dallas-Fort Worth Regional\*

El Paso El Paso International\*

Fort Worth Meacham Field

Harlingen Valley International\*

Houston William P. Hobby\*

Houston Houston Intercontinental\*

Killeen Killeen Municipal

Laredo Laredo International

Longview Gregg County

Lubbock Lubbock International\*

Lufkin Angelina County

McAllen Miller International\*

Midland Midland Regional Airport\*

San Angelo Mathis Field

San Antonio San Antonio International\*

Temple Draughon-Miller Municipal

Tyler Pounds Field

Victoria Victoria Regional

Waco Waco-Madiscn Cooper

Wichita Falls Sheppard AFB/Wichita Falls

Municipal

Lake Jackson Brazoria County

\*Airports with 100,000 + enplanements per year

4-52

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AIRPORT

REGION VII LOCATION AIRPORT NAME

IA Burlington Burlington Municipal

Cedar Rapids Cedar Rapids Municipal\*

Des Moines Des Moines Municipal\*

Dubuque Dubuque Municipal

Fort Dodge Fort Dodge Municipal

Mason City Mason City Municipal

Ottumwa Ottumwa Industrial

Sioux city Sioux City Municipal

Waterloo Waterloo Municipal

KS Dodge City Dodge City Municipal

Garden City Garden City Municipal

Great Bend Great Bend Municipal

Hays Hays Municipal

Lawrence Lawrence Municipal

Liberal Liberal Municipal

Manhattan Manhattan Municipal

Parsons Tri City

Salina Salina Municipal

Wichita Wichita Mid-Continent\*

Topeka Forbes Field

MO Cape Girardeau Cape Girardeau Municipal

Columbia Columbia Regional

Jefferson City Jefferson City Memorial

Joplin Joplin Municipal

Kansas City Kansas City International\*

Kansas City Downtown

Springfield Springfield Municipal\*

St. Louis Lambert-St. Louis International\*

Fort Leonard Wood Forney AAF

NE Alliance Alliance Municipal

Grand Island Hall County Regional

Kearney Kearney Municipal

Lincoln Lincoln Municipal\*

McCook McCook Municipal

Norfolk Karl Stefan Memorial

North Platte Lee Bird Field

Omaha Eppley Airfield\*

Scotts Bluff Scotts Bluff County

REGION VIII

CO Alamosa Alamosa Municipal

Aspen Aspen-Pitkin Co/Sardy Field\*

Colorado Springs City of Colorado Springs Municipal\*

Cortez Cortez-Montezuma County

\*Airports with 100,000 + enplanements per year

4-53

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AIRPORT

REGION VIII LOCATION AIRPORT NAME

CO Denver Stapleton International\*

Durango Durango-La Plata County

Fort Collins Fort Collins-Loveland

Grand Junction Walker Field\*

Gunnison Gunnison County

Hayden Yampa Valley

Montrose Montrose County

Pueblo Pueblo Memorial

Rifle Garfield County

Steamboat Springs Routt County-STOL

MT Billings Billings-Logan International\*

Bozeman Gallatin Field

Butte Bert Mooney-Silver Bow County

Great Falls Great Falls International\*

Helena Helena

Kadispell Glacier Park International

Missoula Johnson-Bell Field

Sidney Sidney-Richland Municipal

West Yellowstone West Yellowstone

ND Bismarck Bismarck Municipal\*

Devils Lake Devils Lake Municipal

Fargo Hector Field\*

Grand Forks Grand Forks International\*

Jamestown Jamestown Municipal

Minot Minot International

Williston Sloulin Field International

SD Aberdeen Aberdeen Regional

Brookings Brookings Municipal

Huron Huron Regional

Pierre Pierre Municipal

Rapid City Rapid City Regional\*

Sioux Falls Joe Foss Field\*

Watertown Watertown Municipal

Yankton Chan Gurney Municipal

UT Cedar City Cedar City Municipal

Logan Logan-Cache

St. George St. George Municipal

Salt Lake City Salt Lake City International\*

Vernal Vernal

WY Casper Natrona County International\*

Cheyenne Cheyenne

Cody E E Faust Regional Airport

Gillette Gillette Campbell County

\*Airports with 100,000 + enplanements per year

4-54

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AIRPORT

REGION VIII LOCATION AIRPORT NAME

WY Jackson Jackson Hole

Laramie General Brees Field

Riverton Riverton Regional

Rock Springs Rock Springs-Sweetwater County

Sheridan Sheridan County

Worland Worland Municipal

REGION IX

AS Pago Pago Pago Pago International

OFU Island OFU

AZ Flagstaff Pulliam

Grand Canyon Grand Canyon National Park\*

Lake Havasu Lake Havasu City

Page Page

Phoenix Phoenix Sky Harbor International\*

Tucson Tucson International\*

Yuma Yuma MCAS/Yuma International

CA Arcata/Eureka Arcata

Bakersfield Meadows Field\*

Burbank Burbank-Glendale-Pasadena\*

Carlsbad McClellan-Palomar

Chico Chico Municipal

Fresno Fresno Air Terminal\*

Imperial Imperial County

Inyokern Inyokern-Kern County Airport #8

Long Beach Long Beach-Daugherty Field\*

Los Angeles Los Angeles International\*

Mammoth Lakes Mammoth-June Lakes

Merced Merced Muni

Modesto Modesto City-County Arpt

\--Harry Sham Field

Monterey Monterey Peninsula\*

Oakland Metropolitan Oakland International\*

Ontario Ontario International\*

Oxnard Oxnard

Palm Springs Palm Springs Municipal\*

Redding Redding Muni

Sacramento Sacramento Metropolitan\*

San Diego San Diego International

\- Lindbergh Field\*

San Francisco San Francisco International\*

San Jose San Jose Muni\*

San Luis Obispo San Luis Obispo County\*

Santa Ana John Wayne Airport-Orange County\*

Santa Barbara Santa Barbara Municipal\*

Santa Maria Santa Maria Public

Santa Rosa Sonoma County

\*Airports with 100,000 + enplanements per year

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AIRPORT

REGION IX LOCATION AIRPORT NAME

CA South Lake Tahoe Lake Tahoe

Stockton Stockton Metropolitan

Visalia Visalia Muni

Avalon Catalina

Palmdale AF Plant 42

CQ Obyan Saipan International

Rota Island Rota International

Peipeinimaru West Tinian

GU Agana Agana NAS

HI Hana Hana

Hilo General Lyman Field\*

Honolulu Honolulu International\*

Kahului Kahului\*

Kailua-Kona Ke-Ahole\*

Kamuela Waimea-Kohala

Kaunakakai Molokai

Lanai City Lanai

Lihue Lihue\*

Hanalei Princeville

Lahaina Kaanapali

NV Elko Elko Municipal - J.C. Harris Field

Ely Ely Arpt/Yelland Field

Las Vegas North Las Vegas Air Terminal

Las Vegas Mc Carran International\*

Reno Reno Cannon International\*

TT Enenelip Island Marshall Islands International

Ponape Island Ponape International

Moen Island Truk International

Yap Island Yap International

Babelthuap Island Babelthuap/Koror

REGION X

AK Alakanuk Alakanuk

Anchorage Anchorage International\*

Andreafsky St. Marys

Aniak Aniak

Barrow Wiley Post Will Rogers Memorial

Bethel Bethel

Chevak Chevak

Cold Bay Cold Bay

Cordova Cordova-Mile 13

Deadhorse Deadhorse

\*Airports with 100,000 + enplanements per year

4-56

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AIRPORT

REGION X LOCATION AIRPORT NAME

AK Dillingham Dillingham

Fairbanks Fairbanks International\*

Fort Yukon Fort Yukon

Galena Galena

Gambell Gambell

Golovin Golovin

Gustavus Gustavus

Haines Haines

Homer Homer

Hoonah Hoonah

Hooper Bay Hooper Bay

Iliamna Iliamna

Juneau Juneau International\*

Kenai Kenai Municipal

Ketchikan Ketchikan International

King Salmon King Salmon

Kipnuk Kipnuk

Kodiak Kodiak Airport

Kodiak Inner Harbor SPB

Kotzebue Ralph Wien Memorial

McGrath McGrath

Mountain Village Mountain Village

New Koliganek New Koliganek

Nome Nome

Noorvik Robert (Bob) Curtis Memorial

Petersburg Petersburg

Point Hope Point Hope

Savoonga Savoonga

Sitka Sitka

Skagway Skagway

Unalakleet Unalakleet

Unalaska Unalaska

Valdez Valdez Municipal No. 2

Wrangell Wrangell

Yakutat Yakutat

ID Boise Boise Air Terminal\*

Hailey Friedman Memorial

Idaho Falls Idaho Falls Municipal Airport

(Fanning Fld)

Lewiston Lewiston-Nez Perce County

Pocatello Pocatello Municipal

Twin Falls City-County Airport

OR Eugene Mahlon Sweet Field\*

Klamath Falls Kingsley Field

Medford Medford-Jackson County\*

North Bend North Bend Municipal

\*Airports with 100,000 + enplanements per year

4-57

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AIRPORT

REGION X LOCATION AIRPORT NAME

OR Pendleton Pendleton Municipal

Portland Portland International\*

Redmond Roberts Field

Salem McNary Field

WA Bellingham Bellingham International

Bremerton Kitsap County

Burlington/Mt. Vernon Skagit Regional/Bayview

Eastsound Orcas Island

Friday Harbor Friday Harbor

Pasco Tri-Cities\*

Port Angeles William R. Fairchild International

Pullman Pullman-Moscow Regional

Seattle Seattle-Tacoma International\*

Spokane Spokane International\*

Walla Walla City-County Airport

Wenatchee Pangborn Field

Yakima Yakima Air Terminal

\*Airports with 100,000 + enplanements per year

4-58

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ATTACHMENT 3

BUYER NOTIFICATION FORM

4-59

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NOTICE TO PROSPECTIVE BUYERS OF PROPERTIES LOCATED IN

RUNWAY CLEAR ZONES AND CLEAR ZONES

(In accordance with section 51.303(a)(3), this notice must be given to

anyone interested either in buying an existing HUD property, or using
HUD

assistance to buy an existing property, which is located in either a
Runway

Clear Zone at a civil airport or a Clear Zone at a military
installation.)

The property which you are interested in purchasing at (to be filled in
by

HUD staff or Title I recipient)
\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_
is

located in the Runway Clear Zone/Clear Zone for (to be filled in by HUD

staff or Title I recipient)
\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_.

Studies have shown that if an accident were to occur it is more likely
to

occur within the Runway Clear Zone/Clear Zone than in other areas around

the airport/airfield. Please note that we are not discussing the chances

that an accident will occur, only where one is most likely to occur.

You should also be aware that the airport/airfield operator may wish to

purchase the property at some point in the future as part of a clear
zone

acquisition program. Such programs have been underway for many years at

airports and airfields across the country. We cannot predict if or when

this might happen since it is a function of many factors, particularly
the

availability of funds, but it is a possibility.

We wanted to bring this information to your attention. Your signature on

the space below indicates that you are now aware that the property you
are

interested in is located in a Runway Clear Zone/Clear Zone.

\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_
\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_

Signature of prospective buyer Date

\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_

Type or printed name of prospective buyer

(This notice must be maintained as part of the HUD file on this action.)

4-60