We are correcting the following errors:

We omitted a compliance date for some of the changes made in the 2010 rule making their 

compliance dates unclear. In this correction, we clarify that all 2010 rule changes have a three 

year compliance date for existing sources, including monitoring requirements.

In establishing revised or new emission limits for existing cement kilns, it was not our 

intention to remove the existing emission limits on these kilns. However, when we revised the 

emission limits section the current emissions limits were overwritten by the new requirements. 

In these corrections we are adding back the emission limits as they existed prior to the 

September 9, 2010 rule amendments. This includes both the exiting source limits and new 

source limits that existed at that time. 

In the Incorporation be reference section of Part 60 subpart A we inadvertently omitted 

§60.257(b)(3), which was previously incorporated in paragraph §60.17(h)(4). In this notice are 

adding this text to that paragraph.

On Table 1 of §63.1343 line 16 in the column titled “and if it is located” we left out the 

words “At a major source”, and are adding this language to the table.

Here is the table of emissions limits that existed prior to the 

last amendments. Please check it to be sure I didn’t get 

something wrong. 

Emissions limits that were in effect prior to September 9, 2010. 

Any source defined as an existing source in §63.1351, and that 

was subject to a PM, mercury, THC, D/F, or opacity emissions 

limit prior to September 9, 2010 must continue to meet the 

limits shown in Table 2 to this section until they have issued a 

notification of compliance with the appropriate emissions limits 

or monitoring requirement promulgated on September 9, 2010.
Table 2. Emissions Limits that were in Effect Prior to September 9, 2010 for Kilns (Rows 

1-4), Clinker Coolers (Row 5), and Raw Material Dryers (Rows 6-9). 

If your 

source is and And if it is 

Your 

emissions 

limits are:

And the units 

of the 

emissions limit 

are:

The oxygen 

correction 

factor is:

1.

An 

existing 

kiln 

it commenced 

construction 

or 

reconstruction

on or prior to 

December 2, 

2005

Located 

at a 

major 

source

PM - 0.3

Opacity 20

D/F – 0.21

THC -

502,3,4

lb/ton feed

percent

ng/dscm (TEQ)

ppmvd

NA

NA

7 percent

7 percent

2.

An 

existing 

kiln 

it commenced 

construction 

or 

reconstruction 

after December 

2, 2005

Located 

at a 

major 

source

PM - 0.3 

Opacity 20

D/F – 0.21

THC – 202

Mercury –

41 

lb/ton feed

percent

ng/dscm (TEQ)

ppmvd

ug/dscm

NA

7 percent

7 percent

7 percent

3.

An 

existing 

kiln 

it commenced 

construction 

or 

reconstruction 

on or prior to 

December 2, 

2005

Not

located 

at a 

major 

source

D/F – 0.21

THC –

502,3,4

ng/dscm (TEQ)

ppmvd

NA

7 percent

7 percent

4.

An 

existing 

kiln 

it commenced 

construction 

or 

reconstruction 

Not 

located 

at a 

major 

D/F – 0.21

THC – 202

Mercury –

41 

ng/dscm (TEQ)

ug/dscm

NA

7 percent

7 percent
after December 

2, 2005

source

5.

An 

existing 

clinker 

cooler

NA

Located 

at a 

major 

source

PM - 0.01 

Opacity -

10

lb/ton feed

percent NA

6.

An 

Existing 

raw 

material 

dryer

it commenced 

construction 

or 

reconstruction 

on or prior to 

December 2, 

2005

Located 

at a 

major 

source

THC - 502,3

Opacity -

10

Ppmvd

Percent

7 percent

NA

7.

An 

Existing 

raw 

material 

dryer

it commenced 

construction 

or 

reconstruction 

after December 

2, 2005

Located 

at a 

major 

source

THC - 202,3

Opacity -

10

ppmvd

percent

7 percent

NA

8.

An 

Existing 

raw 

material 

dryer

it commenced 

construction 

or 

reconstruction 

on or prior to 

December 2, 

2005

Not 

located 

at a 

major 

source

THC - 502,3 Ppmvd 7 percent

9.

An 

Existing 

raw 

material 

dryer

it commenced 

construction 

or 

reconstruction 

after December 

2, 2005

Not 

located 

at a 

major 

source

THC - 20

2 ppmvd 7 percent
1 If the average temperature at the inlet to the first particulate matter control device 

(fabric filter or electrostatic precipitator) during the D/F performance test is 400 oF or 

less this limit is changed to 0.4 ng/dscm (TEQ).

2 Measured as propane.

3 Only applies to Greenfield kilns

4 As an alternative a source may demonstrate a 98 percent reduction in THC emissions from

the exit of the kiln to discharge to the atmosphere. Inline raw mills are considered to 

an integral part of the kiln. 

5 As an alternative a source may route the emissions through a packer bed or spray tower 

wet scrubber with a liquid-to-gas ratio of 30 gallons per 1000 actual cubic feet per 

minute or more and met a site-specific emission limit based on the measured performance

of the wet scrubber.
Here is how we will change the compliance date section:

(First Peragraph)

Except as noted in the third paragraph, the compliance date for 

any affected existing source subject to any rule requirements 

that were in effect prior to December 20, 2006, is:

 June 14, 2002, for sources that commenced construction 

prior to or on March 24, 1998, or

 June 14, 1999 or startup for sources that commenced 

construction after March 24, 1998.

(Second paragraph)

Except as noted in the third paragraph, the compliance date for 

any affected existing source subject to any rule requirements 

that became effective on December 20, 2006, is:

 December 21, 2009, for sources that commenced construction 

after December 2, 2005 and prior to or on December 20, 

2006, or

 December 21, 2006 or startup for sources that commenced 

construction after December 20, 2006.

(Third paragraph)

The compliance date for existing sources for all the

requirements that become effective on November 8, 2010 will be 

September 9, 2013.

(Fourth Paragraph)

The compliance date for new sources is November 9, 2010 or 

startup, whichever is later.