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Title 40

Displaying title 40, up to date as of 6/08/2026. Title 40 was last amended 6/08/2026.
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Table 9 to Subpart AAAAA of Part 63—Emissions Averaging Emission Limits

As required in § 63.7090(d), if you are using emissions averaging for either HCl emission limits or mercury emission limits you must meet each emission limit in the following table that applies to you.

For . . . You must meet the following emission limit
1. Existing straight rotary lime kilns and their associated coolers producing dolomitic quick lime and/or dead burned dolomitic lime HCl emissions must not exceed 2.1 lb/ton of lime produced.
2. Existing straight rotary lime kilns and their associated coolers producing high-calcium quick lime HCl emissions must not exceed 0.047 lb/ton of lime produced.
3. Existing preheater rotary lime kilns and their associated coolers producing dolomitic quick lime and/or dead burned dolomitic lime HCl emissions must not exceed 0.36 lb/ton of lime produced.
4. Existing preheater rotary lime kilns and their associated coolers producing high-calcium quick lime HCl emissions must not exceed 0.087 lb/ton of lime produced.
5. All vertical lime kilns and their associated coolers producing dolomitic quick lime and/or dead burned dolomitic lime HCl emissions must not exceed 0.36 lb/ton of lime produced.
6. All vertical lime kilns and their associated coolers producing high-calcium quick lime HCl emissions must not exceed 0.019 lb/ton of lime produced.
7. Existing lime kilns and their associated coolers Mercury emissions must not exceed 31 lb/MMton of lime produced.

[89 FR 57757, July 16, 2024]