HAR §11-20-45.2. the periods specified in paragraph (1) were ≤ 0

040 mg/L for TTHM and ≤ 0.030 mg/L for HAA5, and that you have not had any TTHM or HAA5 monitoring violations during the period specified in paragraph (1). (B) The State may require you to submit compliance monitoring results, distribution system schematics, and/or recommended Stage 2 Disinfection Byproduct compliance monitoring locations in addition to your certification. If you fail to submit the requested information, the State may require standard monitoring under subsection (b) or a system specific study under subsection (c). (C) The State may still require standard monitoring under subsection (b) or a system specific study under subsection (c) even if you meet the criteria in paragraph (1). (D) You must retain a complete copy of your certification submitted under this section for 10 years after the date that you submitted your certification. You must make the certification, all data upon which the certification is based, and any State notification available for review by the State or the public. (e) Very small system waivers. (1) If you serve fewer than 500 people and you have taken TTHM and HAA5 samples under section 11-20-45.1, you are not required to comply with this section unless the State notifies you that you must conduct standard monitoring under subsection (b) or a system specific study under subsection (c). (2) If you have not taken TTHM and HAA5 samples under section 11-20-45.1 or if the State notifies you that you must comply with this 20-212 3376 图 §11-20-45.2 section, you must conduct standard monitoring under subsection (b) or a system specific study under subsection (c). (f) Stage 2 Disinfection Byproducts compliance monitoring location recommendations. (1) Your IDSE report must include your recommendations and justification for where and during what month(s) TTHM and HAA5 monitoring under section 11-20-45.3 should be conducted. You must base your recommendations on the criteria in paragraphs (2) through (5). (2) You must select the number of monitoring locations specified in the following table. You will use these recommended locations as Stage 2 Disinfection Byproduct routine compliance monitoring locations, unless State requires different or additional locations. You should distribute locations throughout the distribution system to the extent possible. | Source water type | Population size category | Monitoring frequency^{1} | Distribution system monitoring locations^{1} | | | | | --- | --- | --- | --- | --- | --- | --- | | | | | Total per monitoring period^{2} | Highest TTHM | Highest HAA5 | Existing section 11-20-45.1 compliance | | Subpart H | <500 | per year | 2 | 1 | 1 | - | | | 500-3,300 | per quarter | 2 | 1 | 1 | - | | | 3,301-9,999 | per quarter | 2 | 1 | 1 | - | | | 10,000 -49,999 | per quarter | 4 | 2 | 1 | 1 | | | 50,000 -249,999 | per quarter | 8 | 3 | 3 | 2 | | | 250,000 -999,999 | per quarter | 12 | 5 | 4 | 3 | | | 1,000,000 -4,999,999 | per quarter | 16 | 6 | 6 | 4 | | | ≥5,000,000 | per quarter | 20 | 8 | 7 | 5 | 20-213 3376 §11-20-45.2 | Ground | <500 | per year | 2 | 1 | 1 | - | | --- | --- | --- | --- | --- | --- | --- | | water | 500-9,999 | per year | 2 | 1 | 1 | - | | | 10,000 -99,999 | per quarter | 4 | 2 | 1 | 1 | | | 100,000 -499,999 | per quarter | 6 | 3 | 2 | 1 | | | ≥500,000 | per quarter | 8 | 3 | 3 | 2 | ¹All systems must monitor during month of highest DBP concentrations. ²Systems on quarterly monitoring must take dual sample sets every 90 days at each monitoring location, except for subpart H systems serving 500-3,300. Ground water systems serving 500-9,999 on annual monitoring must take dual sample sets at each monitoring location. All other systems on annual monitoring and subpart H systems serving 500-3,300 are required to take individual TTHM and HAA5 samples (instead of a dual sample set) at the locations with the highest TTHM and HAA5 concentrations, respectively. For systems serving fewer than 500 people, only one location with a dual sample set per monitoring period is needed if highest TTHM and HAA5 concentrations occur at the same location, and month. (3) You must recommend Stage 2 Disinfection Byproduct compliance monitoring locations based on standard monitoring results, system specific study results, and section 11-20-45.1 compliance monitoring results. You must follow the protocol in subparagraphs (A) through (H). If required to monitor at more than eight locations, you must repeat the protocol as necessary. If you do not have existing section 11-20-45.1 compliance monitoring results or if you do not have enough existing section 11-20-45.1 compliance monitoring results, you must repeat the protocol, skipping the provisions of subparagraphs (C) and (G) as necessary, until you have identified the required total number of monitoring locations. Location with the highest TTHM LRAA not previously 20-214 3376 1