Ala. Admin. Code r. 335-7-6-.19
Current through Register Vol. 42, No. 12, September 30, 2024
Section 335-7-6-.19 - Cryptosporidium Treatment RequirementsFiltered systems must provide the level of additional treatment for Cryptosporidium Treatment Requirements specified in the following table based upon their bin classification as determined under rule 335-7-2-.17.
(a) Additional treatment requirement for Cryptosporidium Treatment Requirements based upon bin classification:
| Additional Treatment Requirements for Cryptosporidium |
| Bin classification | The system is in full compliance with 335-7-6 -2, then the additional treatment requirements are... |
| Conventional filtration treatment (including softening) | Direct Filtration | Slow sand or diatomaceous earth filtration | Alternative filtration technologies |
| Bin 1 | No additional treatment | No additional treatment | No additional treatment | No additional treatment |
| Bin 2 | 1-log treatment | 1.5-log treatment | 1-log treatment | (1) |
| Bin 3 | 2-log treatment | 2.5-log treatment | 2-log treatment | (2) |
| Bin 4 | 2.5-log treatment | 3-log treatment | 2.5-log treatment | (3) |
(1) As determined by the Department such that the total Cryptosporidium Treatment Requirements removal and inactivation is at least 4.0-log.(2) As determined by the Department such that the total Cryptosporidium Treatment Requirements removal and inactivation is at least 5.0-log.(3) As determined by the Department such that the total Cryptosporidium Treatment Requirements removal and inactivation is at least 5.5-log.(b) Systems must use one or more of the treatment and management options listed in rule 335-7-6-.21 to comply with the additional Cryptosporidium Treatment Requirements treatment required in subparagraph (a) of this rule.(c) Systems classified in Bin 3 or Bin 4 must achieve at least 1-log of the additional Cryptosporidium Treatment Requirements treatment required under this section using either one or a combination of the following: bag filters, bank filtration, cartridge filters, chlorine dioxide, membranes, ozone, or UV, as described in rule 335-7-6-.22.(d) Failure by a system in any month to achieve treatment credit by meeting the criteria in rules 335-7-6-.22 through 335-7-6-.26 for microbial toolbox options that is at least equal to the level of treatment required in subparagraph (a) of this rule is a violation of the treatment technique requirement.(e) If the Department determines during a sanitary survey or an equivalent source water assessment that after a system completed the monitoring conducted under rule 335-7-2-.17, significant changes occurred in the system's watershed that could lead to increase contamination of the source water by Cryptosporidium Treatment Requirements, the system must take actions specified by the Department to address the contamination. These actions may include additional source water monitoring and/or implementation of microbial toolbox options listed in rule 335-7-6-.21.Ala. Admin. Code r. 335-7-6-.19
New Rule: Filed December 18, 2007; effective January 22, 2008.Author: Dennis D. Harrison
Statutory Authority:Code of Ala. 1975, §§ 22-23-33, 22-23-49, 22-22A-5, 22-22A-6.