Mineral Wool Production - Industry Meeting 

(January 28, 2010)

Background Information

1.	Residual Risk and Technology Review (RTR)

Risk modeling based on updated emissions data (after ANPRM comments) 

Cancer 

Risk drivers: Arsenic compounds and beryllium compounds

Most metal HAP emissions were not reported by the 8 operating plants

Emission factor based on PM, developed from closed facility (the only
facility that provided speciated PM/metals data)

Chronic Noncancer (risk driver ( formaldehyde)

Acute Noncancer (risk driver ( formaldehyde)

Mineral Wool Production NESHAP (subpart DDD)

10 lb PM per ton of melt; 0.10 lb CO per ton of melt or reduce
uncontrolled CO emissions ≥99%	CO surrogate for COS; CO limit based on
incinerator and fabric filter test 

Curing Oven	Existing & New	0.06 lb formaldehyde per ton of melt or
reduce uncontrolled formaldehyde emissions ≥80%	Organic HAP binder;
formaldehyde is a surrogate for phenol and methanol.    

Fiber Collection & Cooling Chamber	Existing & New	Not regulated under
MACT – source of formaldehyde, phenol, and methanol emissions	No MACT
floor could be determined; above-the-floor too costly (thermal
incineration).



List of U.S. operating facilities provided by NAIMA 

Company	Location	Bonded Lines	Unbonded Lines	Cupola Controls	Curing
Controls

Amerock	Nolanville, TX	0	2	baghouse	n/a

Isolatek	Huntington, IN	0	2	baghouse	n/a

Industrial Insulation Group (IIG)	Phenix City, AL	1	1	 incinerator and
baghouse	recuperative incinerator

Rock Wool Mfg	Leeds, AL	1	1	baghouse	Partial –> redirect exhaust (?)

Sloss (now Walter Energy)	Birmingham, AL	0	5	5 cupolas,  1 baghouse	n/a

Thermafiber	Wabash, IN	1	1	baghouse	RTO

USG	Walworth, WI	0	1	baghouse	thermal incinerator

USG	Red Wing, MN	0	2	baghouse	thermal incinerator



2.	Technical Issues Arising From 1/14/2009 Administrative Petition

Lack of COS emission standards (existing and new cupolas)

Standards for organic HAP other than formaldehyde (e.g., phenol)

Validation of  formaldehyde surrogacy for phenol for different controls

Examine process used to set formaldehyde limits 

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摧ⷬV؀3. 	Information Collection Request (ICR)

Facility/equipment/process/controls information (electronic survey)

Emissions testing for:

Cupolas (PM, HAP metals, CO, and COS) 

Curing ovens (formaldehyde, phenol, other organic HAP) 

Fiber collection and cooling (formaldehyde, phenol, other organic HAP)

Schedule: send out in February 2010; test data and responses due June
2010

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