DRAFT AGENDA

Mineral Wool and Wool Fiberglass RTRs

Meeting between OMB and EPA  

October 5, 2011

4:00 to 5:00 pm (Eastern Time) 

Call-in Number:  919-541-4376

Agenda Topics:

1.  Summary of the Industry and the Current MACT Standard

2.  Proposed
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Reduce uncontrolled CO emissions ≥ 99% 

Curing Oven 	Existing and New Sources 	0.06 lb formaldehyde per ton of
melt, or

Reduce uncontrolled formaldehyde emissions ≥ 80% 

MINERAL WOOL INDUSTRY OVERVIEW

Mineral Wool is a building insulation serving primarily the industrial,
commercial and institutional markets- used for thermal or acoustical
insulation, noise attenuation, and fire protection

Mineral wool is a fibrous, glassy substance made from natural rock,
blast furnace slag, or other similar materials and consists of silicate
fibers typically 4 to 7 micrometers in diameter

6 companies, 7 facilities. 5 of the 6 companies are Small Businesses

SBAR Panel convened June 1, 2011.

All facilities are major sources of HAP emissions 

DRAFT 2011 RTR Amendments

112(d)(3) MACT

Proposing to correct deficiencies for pollutants that were not regulated
in the 1999 MACT 

HF

HCl

COS (Surrogacy removed)

Phenol (Surrogacy removed)

Methanol (Surrogacy removed)

Formaldehyde 

Proposing to correct deficiency for the collection process that was not
regulated in the 1999 MACT

Collection/curing are being ‘bundled’ together

Subcategorizing according to 3 types of collection/curing

112(f)(2) Risk Review

Risk is acceptable at current levels and within an ample margin of
safety; no amendments are proposed based on 112(f)(2)

112(d)(6) Technology Review

No changes proposed based on 112(d)(6)

Other Changes

Startup and Shutdown- emission limits (in lb/hour units) equivalent to
production-based emission limits for periods during which no production
exists

Malfunction-Affirmative defense language

Clarifying that ‘incinerator’ in rule means ‘thermal oxidizer’
to avoid confusion with 129 rules



Wool Fiberglass 1999 MACT



Glass- Melting Furnaces 	Existing and New Sources 	0.50 lb PM per ton of
glass pulled 

Rotary Spin (RS) Lines 	Existing  Sources 	1.2 lb formaldehyde per ton
of glass pulled

	New Sources	0.8 lb formaldehyde per ton of glass pulled 

Flame Attenuation (FA) Lines	New Sources 	Heavy-Density	7.8 lb
formaldehyde per ton of glass pulled 

	Existing & New

Sources	Pipe Product	lb formaldehyde per ton of glass pulled 

WOOL FIBERGLASS INDUSTRY OVERVIEW

Wool fiberglass is a building insulation serving primarily the
residential housing market- thermal and acoustical insulation for
buildings, automobiles, aircraft, appliances, ductwork, and pipes; other
uses include liquid and air filtration.

30 facilities and 80 furnaces use a variety of processes and
formulations depending on end use market

Most of industry is phasing out the use of formaldehyde-based binders

Some facilities are using a new technology to extend furnace life that
creates high hexavalent chromium emissions

2010 voluntary ICR, including some emissions testing, was conducted by
industry. 

DRAFT 2011 RTR Amendments

112(d)(3) MACT

Proposing to correct deficiencies for pollutants that were not regulated
in the 1999 MACT 

HF

HCl

Phenol (Surrogacy removed)

Methanol (Surrogacy removed)

Formaldehyde  

112(f)(2) Risk Review

Hexavalent chromium is the primary risk driver, followed by
formaldehyde.

We are proposing chrome limits to the rule

112(d)(6) Technology Review

Proposing revised limits based on improved PM control technologies

Proposing to add chrome limits based on new technology to extend furnace
life

Other Changes

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摧堆ÐԀStartup and Shutdown- emission limits (in lb/hour units)
equivalent to production-based emission limits for periods during which
no production exists

Malfunction-Affirmative defense language

Clarifying that ‘incinerator’ in rule means ‘thermal oxidizer’
to avoid confusion with 129 rules

