### NOTICES

[6560-01]

ENVIRONMENTAL PROTECTION

AGENCY 

### EPEL82843

KRAFT PULP MILLS

Draft GuidelineDocument- Availability
AGENCY: Environmental' Protection Agency.
ACTION: Notice of Availability of Draft Guideline Document.
SUMMARY: This action announces the availability of a draft guideline document for the control of total re- duced sulfur(TRS) emissionsfrom ex- isting kraft pulp mills, 'and invites public comments on the contents of the document. Standards of performance for control of TRS from new, modified, andreconstructed kraft pulp mills are beingpromulgated elsewhere in this issue of the FEERAL RGISTES

. Under the CleanAir Act, theAdministrator must issue this draft document, consider the publiccomments received

onthe draft, andpublish afinalguideline document.Publication ofthe final document will trigger thedevelopment of State plans to control TRS emissionsfromexisting draftpulpmills.

DATE: Comments mustbe received on
orbefore April 24,1978. (60 days after this publication).
ADDRESS: Comments should be submitted,preferably in triplicate, to the Emission Standards and Engineering Division, Environmental Protection Agency, Research Triangle Park, N.C. 27711, Attention: Mr. Don R. Good

### win.

A copy of the draft guideline document may be obtained from the US. EPA Library (MD-35), Research Triangle Park, N.C. 27711 (specify "Draft Guideline Document: Control of TRS Emissions from Existing Kraft Pulp Mills").

The draft-guideline document and all public comments received will be available for inspection and copying during normal business hours at the Public Information Reference Unit (EPA Library), Room 2922, 401 M StreetSW.,Washington, D.C.

FOR FURTHER INFORMATION CONTACT:



### Don R. Goodwin, Emission Standards andEngineering Division, Environmental Protection Agency, Re

### search Triangle Park, N.C. 27711, telephone 919-541-5271.

-SUPPLEMIENTARY INFORMATION: The Clean Air Act applies to three general categories of pollutants emitted from stationary sources. The first category consist of pollutants (often referredto as "criteria pollutants") for wfiich airquality criteria,national amblent air quality standards, and State implementation plans are established under sections 108-110 ofthe Act. The second category consist of pollutants listed and controlled as hazardous pollutantsunder section 112ofthe Act.

The third category consists of pollutants that are (or may be) harmful
topublic health or welfarebutare not

or cannotbe controlled under sections 

### 108,-110 or 112.Section 111(d)requires control ofexisting sources of suchpollutants whenever standards ofperfor-

mance (forthosepollutants) areestablished under section 111(b) for new
sources of the same type. For conve- nience of reference, such pollutants

are referred to as "designated pollutants," and existing facilities whose emissions of such pollutants must be controlled under section 111(d) are re- ferred to as "designated facilities."

On November 17, 1975 (40 FR 53340), EPA promulgated a new subpart B to 40 CFRPart 60 establishing procedures and requirements for submittal of State plans for control of designated pollutants from designated facilities under section 111(d). A sum- mary ofsubpart B and a discussion of the basic concepts underlying it appear in the preamble published in connection with its promulgation. In brief, subpart B provides that after a standard ofperformance applicable to emissions of i designated pollutant from new sources is promulgated, the Administrator will publish a draft guideline document containing Information pertinent to the control ofthe

same pollutant from designated (i.e., existing) facilities. He willalso publish

a notice of availability of the draft guideline document and invite com- ments on its contents. After consideration ofthese comments, the Administrator will publish a final guideline document for the pollutant in question, and the States will then have nine months to develop and submit plans for control of that pollutant from designated facilities. Within four months after the date for submission of plans, the Administrator will approve or disapprove each plan (orportion thereof). If a State plan (or portion thereof) is disapproved, the Administrator will promulgate a plan (or portion thereof) within six months after the date for plan submission. These and related provisions of subpart B are basically patterned after section 110 of the Act and 40 CFR Part 51 (concerning adoption and submittal of State implementation plans under section 110).

As discussed in the preamble to subpartB, a distinction is drawn between designated pollutants which may
cause or contribute to endangerment of public health (referred to as "health-related pollutants") and those for which adverse effects on public health have not been demonstrated (referred to at "welfare-related pollutants"). For health-related pollutants, emission standards and compliance schedules in Stateplansmust ordinarily be atleast as stringent asthe corre- sponding emission guidelines and com- pliance times In EPA'sguideline documents. As Provided in subpart 3, States may apply less stringent re- quirements when economic considerations or otherfactors, suchas there- maninguseful life of a designated faclity,make such requirements significantly more reasonable. For welfare related pollutants, States may balance the emission guidelines, compliance times, and other information in EPA's guideline documents against otherfactors of public concern in developing their plans, as explained morefully in the preamble to subpart B and in the Introductory portion ofeach guideline document. Thus,the States havemore flexibility in establishing plans for welfare-related pollutants than is provided for plans involving pollutants thatmay affectpublichealth.

For reasons explained in the draft guideline document, theAdministrator has determined that atmospheric TRS emissions In the kraft pulping industry may cause or contribute to endangerment ofthe publicwelfare butthat adverse effects on public health have not been demonstrated. As indicated above, this means thatTRS emissions will be considered a welfare-related pollutant and the States will have greater flexibility in developing their plans than wouldbe the case if public health mightbe affected.

EMISSION GUIDELINES: The emission guidelines and compliance times contained in the draft guideline document reflectthe Administrator's judgment on the degree of control attainable with application of the best system of continuous emission reduction (considering the cost,nonair qualityhealth, environmental impacts, and energy requirements of such reduction) thathas beenadequately demonstrated for existing facilities at kraft pulp mills, including the time within whichthese systemscan bepurchased and installed. The emission guidelines presented inthe document forcontrol of TRS emissions from existing facilities atkraft pulp mill are 5 partsper million (ppm) of TRS from digester systems, 5ppm ofTRS frommultipleeffect evaporator systems, 5 ppm of TRS from straight kraft recovery fur-

nace systems designed for low TRS emissions (the basis for'this design is defined inthe guideline document), 20 pl~m of TRS from all other straight kraft recovery furnace systems, 25 ppm of TRS from cross-recovery fur-

nace systems, 20 ppm of TRS from lime kiln systems, and 5 ppm ofTRS from condensate stripper systems. These concentration standards are all four-hour averages. The recommended

FEDERAL REGISTER, VOL 43, NO. 37-THURSDAY, FEBRUARY 23, 1978 

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HeinOnline -- 43 Fed. Reg. 7597 1978

### NOTICES

emission guideline for the smelt dissolving tankis 0.0084 gram ofTRSper kilogram of black liquor solids (dry weight). The amount of time neces- sary to retrofit an existing kraft mill

can vary widely depending upon such factors as space limitation, weather conditions, lack of available utilities, delays in equipment delivery, andtime required to develop engineering data. Subject to these considerations, the approximate times necessary to retrofit existing facilities are 3-6 years for recovery furnaces; 2 years for digesters, multiple-effect evaporators, smelt dissolving tanks and condensate strippers; and 2-4 years for lime kilns. The rationale for the selection of these guidelines, including emission test data and control technology, is disbussed in the draft guideline document.

MISCELLANEOUS: This action is being performed under the authority of section 111(d) of the Clean AirAct,

as amended. In accordance with section 117 of the Act, publication of this draft guideline document has been preceded by consultation with appropriate advisory committees, independent experts, andFederal departments and agencies.

Interested persons are invited toparticipate in the development of these guidelines. The Administrator welcomes comments on all aspects of the draft guideline document, including economic andtechnological Issues, the proposed test methods, and the deterfmination that TRS Is a welfare-related, rather than health-related pollutant for purposes ofsection 111(d) and subpart B of40 CFRPart 60.

AuTonrr: Thisnotice ofproposed guide- lines Is Issued under the authority of sec- tions 111, 114, and 301(a) of the Clean Air Act,as amended, Pub.L.91-604, 84Stat.(42 U.S.C. 7411, 7414,7601(a)).

Dated: February 10, 1978.
BARBARA BLUM, ActingAdministrator

IFRDoc. 78-4794Filed2-22-78; 8:45am]

FEDERAL REGISTER, VOL 43, NO.-37-THURSDAY, FEBRUARY 23, 1978 

### 7598

HeinOnline -- 43 Fed. Reg. 7598 1978