1868 Federal Register / Vol. 62, No. 9 / Tuesday, January 14, 1997 / Proposed Rules

§ 39.13 [Amended]

2. Section 39.13 is amended by

adding the following new airworthiness

directive:

Fokker: Docket 96–NM–185–AD.

Applicability: Model F28 Mark 0100 series

airplanes having the serial numbers specified

in Table 1 of this AD; certificated in any

category.

TABLE 1.—SERIAL NUMBERS OF

AIRPLANES SUBJECT TO THIS AD

11244 through 11460, inclusive

11463 through 11469, inclusive

11471

11474 through 11483, inclusive

11489 through 11491, inclusive

11497 through 11499, inclusive

11501

11502

11504

11506

11507

11512 through 11515, inclusive

11517

11520

Note 1: This AD applies to each airplane

identified in the preceding applicability

provision, regardless of whether it has been

otherwise modified, altered, or repaired in

the area subject to the requirements of this

AD. For airplanes that have been modified,

altered, or repaired so that the performance

of the requirements of this AD is affected, the

owner/operator must request approval for an

alternative method of compliance in

accordance with paragraph (e) of this AD.

The request should include an assessment of

the effect of the modification, alteration, or

repair on the unsafe condition addressed by

this AD; and, if the unsafe condition has not

been eliminated, the request should include

specific proposed actions to address it.

Compliance: Required as indicated, unless

accomplished previously.

To detect and prevent fatigue cracking in

the vertical stabilizer, which consequently

could reduce its structural integrity,

accomplish the following:

(a) For airplanes having serial numbers

11244 through 11419, inclusive, and 11421:

Except as provided by paragraph (c) of this

AD, prior to the accumulation of 8,500 total

landings or within 30 days after the effective

date of this AD, whichever occurs later,

perform an eddy current inspection to detect

fatigue cracking in the left-hand and righthand flanges and finger strips at rib 5.0 of the

vertical stabilizer, in accordance with Fokker

Service Bulletin SBF100–55–019, Revision 1,

dated May 19, 1993.

(1) If no cracking is detected, repeat this

inspection thereafter at intervals not to

exceed 2,000 landings until the requirements

of paragraph (b) of this AD are accomplished.

(2) If any cracking is detected, prior to

further flight, repair in accordance with a

method approved by the Manager,

Standardization Branch, ANM–113, FAA,

Transport Airplane Directorate.

(b) For airplanes with serial numbers

11244 through 11419, inclusive, and 11421,

accomplish the requirements of both

paragraphs (b)(1) and (b)(2) of this AD:

(1) Except as provided by paragraph (c) of

this AD, prior to the accumulation of 13,500

total landings, or within 6 months after the

effective date of this AD, whichever occurs

later, perform an eddy current inspection to

detect fatigue cracking in the left-hand and

right-hand flanges and finger strips at rib 5.0

of the vertical stabilizer, in accordance with

Part 1 of the Accomplishment Instructions of

Fokker Service Bulletin SBF100–55–018,

Revision 1, dated December 27, 1993.

(i) If no cracking is detected, prior to

further flight, accomplish the requirements of

paragraph (b)(2) of this AD.

(ii) If any cracking is detected, prior to

further flight, repair in accordance with a

method approved by the Manager,

Standardization Branch, ANM–113, and

accomplish the requirements of paragraph

(b)(2) of this AD.

(2) After accomplishing the requirements

of paragraph (b)(1) of this AD, modify rib 5.0

of the vertical stabilizer by installing new

stiffening, in accordance with Part 2 of the

Accomplishment Instructions of Fokker

Service Bulletin SBF100–55–018, Revision 1,

dated December 27, 1993. Accomplishment

of this modification constitutes terminating

action for the repetitive inspections required

by paragraph (a) of this AD.

(c) The following exceptions apply with

regard to the requirements of paragraphs (a)

and (b) of this AD:

(1) Accomplishment of the inspection

specified in paragraph (a) and (b)(1) of this

AD is not required if the modification

specified in paragraph (b)(2) is accomplished

prior to the accumulation of 7,300 total

landings on the airplane.

(2) Compliance with AD 91–18–15,

amendment 39–8018, is not required if the

requirements of paragraph (b)(2) of this AD

are accomplished prior to the accumulation

of 6,000 total landings on the airplane.

(d) For all airplanes: At the applicable

times specified in paragraph (d)(1) or (d)(2),

modify the Hi-lok bolt holes at rib 5.0 of the

vertical stabilizer by cold expansion, in

accordance with Fokker Service Bulletin

SBF100–55–023, dated January 3, 1995.

(1) For airplanes that have been modified

in accordance with the requirements of

paragraph (b) of this AD prior to the effective

date of this AD: Modify prior to the

accumulation of either 10,000 landings after

in-service modification, or 10,000 landings

after delivery with factory modification, as

applicable; or within 30 days after the

effective date of this AD, whichever occurs

later.

(2) For all other airplanes: Modify

concurrent with accomplishing the

requirements of paragraph (b) of this AD.

(e) An alternative method of compliance or

adjustment of the compliance time that

provides an acceptable level of safety may be

used if approved by the Manager,

Standardization Branch, ANM–113.

Operators shall submit their requests through

an appropriate FAA Principal Maintenance

Inspector, who may add comments and then

send it to the Manager, Standardization

Branch, ANM–113.

Note 2: Information concerning the

existence of approved alternative methods of

compliance with this AD, if any, may be

obtained from the Standardization Branch,

ANM–113.

(f) Special flight permits may be issued in

accordance with §§ 21.197 and 21.199 of the

Federal Aviation Regulations (14 CFR 21.197

and 21.199) to operate the airplane to a

location where the requirements of this AD

can be accomplished.

Issued in Renton, Washington, on January

8, 1997.

Darrell M. Pederson,

Acting Manager, Transport Airplane

Directorate, Aircraft Certification Service.

[FR Doc. 97–883 Filed 1–13–97; 8:45 am]

BILLING CODE 4910–13–U

ENVIRONMENTAL PROTECTION

AGENCY

40 CFR Part 60

[FRL–5676–3]

New Source Performance Standards

and Emissions Guidelines: Sewage

Sludge Incinerators

AGENCY: Environmental Protection

Agency (EPA).

ACTION: Notice of Additional

Information (NAI).

SUMMARY: This action announces the

EPA’s intention to issue regulations and

guidelines under Section 129 of the

Clean Air Act for Sewage Sludge

Incinerators (SSI) that combust sludge

from Publicly Owned Treatment Works

and to remove Sewage Sludge

Incinerators from the list of Major

Source Categories previously scheduled

for rule development under Section 112

of the Clean Air Act.

DATES: Comments must be received on

or before March 17, 1997.

ADDRESSES: Comments. Comments on

this notice should be submitted in

duplicate, if possible, to: The Air and

Radiation Docket and Information

Center (6102), ATTN: Docket No. A–96–

42, U.S. Environmental Protection

Agency, 401 M Street, S.W.,

Washington, D.C. 20460.

Docket. Dockets are available for

public inspections and copying between

8:00 a.m and 5:30 p.m., Monday through

Friday, at the Air and Radiation Docket

and Information Center, U.S. EPA, 401

M Street, S.W., Room M1500,

Washington, D.C. 20460. The center’s

telephone number is (202) 260–7548

and the fax number is (202) 260–4400.

A reasonable fee may be charged for

copying docket materials.

FOR FURTHER INFORMATION CONTACT: Mr.

Eugene Crumpler at (919) 541–0881,

Emissions Standards Division (MD–13),
Federal Register / Vol. 62, No. 9 / Tuesday, January 14, 1997 / Proposed Rules 1869

U.S. EPA, Research Triangle Park, N.C.

27711.

SUPPLEMENTARY INFORMATION: The

information in this preamble is

organized as follows:

1. Background

The Clean Air Act as amended

November 1990, requires under the

revisions to Section 112, that the

Agency list and promulgate National

Emissions Standards for Hazardous Air

Pollutants (NESHAP) in order to

control, reduce, or otherwise limit the

emissions of HAP for categories of major

and area sources. Pursuant to the

various specific listing requirements in

Section 112(c), the Agency published on

July 16, 1992 (57 FR 31576) an initial

list of 174 categories of major and area

sources that would be henceforth

subject to emissions standards. Sewage

Sludge Incineration (SSI) was one of the

174 categories listed for development of

a NESHAP.

Following this initial listing, and

pursuant to requirements in Section

122(e), on December 3, 1993 (58 FR

63941), the Agency published a

schedule for the promulgation of

emission standards for each of the 174

listed source categories. The SSI were

listed for promulgation of a NESHAP no

later than November 15, 2000. The

reader is directed to those two notices

for information relating to development

of the initial list and schedule.

The Agency published a Notice of

Listing of Categories and Regulatory

Schedule for Air Emissions From Other

Solid Waste Incineration (OSWI) on

November 2, 1993 (58 F.R. 58498). The

New Source Performance Standards

(NSPS) and Emissions Guidelines (EG)

for OSWI’s are to be developed under

section 129 of the Clean Air Act. That

notice listed seven categories of OSWIs.

The notice established a promulgation

date for rulemaking for the seven

categories of OSWI’s of no later than

November 15, 2000. Incineration of

sludge from publicly owned waste water

treatment works (POTW’s) was not

listed.

The Agency published an Advanced

Notice of Proposed Rulemaking

(ANPRM) for NSPS and EG applicable

to Industrial and Commercial Waste

Incinerators (ICWI) and Other Solid

Waste Incinerators (OSWI) on December

28, 1994 (59 FR 66850). That notice

announced the EPA’s intent to develop

NSPS and EG under Section 129 of the

Act for the seven OSWI categories and

ICWIs. Not included among the listed

categories were incinerators used to

combust sewage sludge produced at

POTWs.

Today’s Notice of Additional

Information is announcing EPA’s

oversight in not listing SSI’s in the

November 2, 1993 listing of OSWI. The

Agency, on closer reading of Section

129 of the Act, has now determined that

SSI should properly be regulated under

Section 129 rather that Section 112.

Section 129 requires the EPA to

establish NSPS for new and EG for

existing facilities, for each category of

solid waste incineration units. Section

129 defines a solid waste incineration

unit as ‘‘a distinct operating unit of any

facility which combusts any solid waste

material from commercial or industrial

establishments or the general public

(including single and multiple

residences, hotels, and motels).’’ Sludge

generated by POTWs is a solid waste

from the general public, commercial and

industrial establishments.

Regulation of SSI under Section 129

provides for regulation of four criteria

pollutants that are not listed as

Hazardous Air Pollutants in Section

112. Also Section 129 provides for

regulation of both new and existing

units and does not have the major

source quantity cutoff of Section

112(a)(1). Development of guidelines for

operator training and certification of SSI

operators is also a requirement of

Section 129. These provisions will give

the EPA more flexibility in setting rules

for different sizes of SSI and will assure

the public that the SSI are being

operated in a manner that will protect

the public health. The promulgation

date for an NSPS and EG applicable to

SSI remains no later than November 15,

2000.

The Agency also notes that this action

announces the EPA’s intent to delist SSI

from the Section 112(c) source category

list and the 112(e) schedule and to add

SSI to the list of categories of Other

Solid Waste Incinerators. At the time of

proposal of the NSPS and EG under

Section 129, the SSI will be delisted

from the Section 112(c) list and the

112(e) schedule and added to the list of

categories and regulatory schedule for

Other Solid Waste Incinerators.

Dated: January 8, 1997.

Mary D. Nichols,

Assistant Administrator for Air and

Radiation.

[FR Doc. 97–873 Filed 1–13–97; 8:45 am]

BILLING CODE 6560–5O–P

40 CFR Part 63

[AD–FRL–5677–2]

RIN 2060–AD–56 and RIN 2060–AE–37

National Emission Standards for

Hazardous Air Pollutants Emissions:

Group I Polymers and Resins and

Group IV Polymers and Resins

AGENCY: Environmental Protection

Agency (EPA).

ACTION: Proposed rule.

SUMMARY: On September 5, 1996, the

EPA promulgated 40 CFR part 63,

Subpart U—National Emission

Standards for Hazardous Air Pollutants

(NESHAP) for Group I Polymers and

Resins (61 FR 46906), and on September

12, 1996, the EPA promulgated 40 CFR

part 63, Subpart JJJ—Group IV Polymers

and Resins NESHAP (61 FR 48208).

This action proposes to correct an error

in the final Group I Polymers and Resins

NESHAP, by extending the compliance

date for heat exchange systems. In

addition, this action proposes to extend

the initial compliance date for

equipment leaks for both the Group I

and Group IV Polymers and Resins

NESHAP, to allow time necessary for

affected sources to respond to

amendments to the hazardous organic

NESHAP (HON) equipment leak

provisions promulgated on December

26, 1996, which are directly referenced

in both subparts U and JJJ.

Because these amendments are merely

extending the compliance date for

equipment leaks and heat exchange

systems, the EPA does not anticipate

receiving adverse comments.

Consequently, the proposed revisions to

the promulgated rule are also being

issued as a direct final rule in the final

rules section of this Federal Register. If

no significant adverse comments are

received by the due date for comments

(see DATES section below), no further

action will be taken with respect to this

proposal, and the direct final rule will

become final on the date provided in

that action.

DATES: Comments. Comments must be

received on or before February 13, 1997,

unless a hearing is requested by January

24, 1997. If a hearing is requested,

written comments must be received by

February 28, 1997.

Public Hearing. Anyone requesting a

public hearing must contact the EPA no

later than January 24, 1997. If a hearing

is held, it will take place on January 29,

1997, beginning at 10:00 a.m.

ADDRESSES: Comments. Comments

should be submitted (in duplicate, if

possible) to: Air and Radiation Docket

and Information Center (6102),