1. A. In order to clarify the requirements for a system to be able to achieve ACC #1, the "Step 1 Required Removal of TOC by Enhanced Coagulation and Enhanced Softening for Subpart H Systems Using Conventional Treatment" matrix table under 40 CFR 141.135(b)(2) is hereby amended to read as follows.

   Source-Water TOC, mg/L	Source-Water Alkalinity, mg/L as CaCO3 (in percentages)
   	0-60	>60-120	>1203
   >2.0-4.0	35.0	25.0	15.0
   >4.0-8.0	45.0	35.0	25.0
   >8.0	50.0	40.0	30.0

STEP 1 REQUIRED REMOVAL OF TOC BY ENHANCED COAGULATION AND ENHANCED SOFTENING FOR SUBPART H SYSTEMS USING CONVENTIONAL TREATMENT ^{1, 2}

¹Systems meeting at least one of the conditions in Paragraph (a)(2)(i)-(vi) of 40 CFR 141.135 are not required to operate with enhanced coagulation.

²Softening system meeting one of the alternative compliance criteria in Paragraph (a)(3) of 40 CFR 141.135 are not required to operate with enhanced softening.

³System practicing softening must meet the TOC removal requirements in this column.

Authority Note

AUTHORITY NOTE: Promulgated in accordance with R.S. 40:4(A)(8) and 40:5(2)(3)(5)(6)(17)(20).

Historical Note

HISTORICAL NOTE: Promulgated by the Department of Health and Hospitals, Office of Public Health, LR 30:1198 (June 2004).