N.H. Admin. Code § Env-Ws 380.28

Current through Register No. 45, November 7, 2024

Section Env-Ws 380.28 - Additional Reporting and Recordkeeping Requirements for All Systems

(a) Pursuant to 40 CFR 141.503(g), beginning January 14, 2005, in addition to the reporting and recordkeeping requirements in Env-Ws 380.21, the owner of a public water system providing conventional filtration treatment or direct filtration, shall report monthly to the department the information specified in (c) and (e) below.

(b) In addition to the reporting and recordkeeping requirements in Env-Ws 380.21, the owner of a public water system that provides filtration approved under Env-Ws 380. 27 shall report monthly to the department the information specified in (c) below.

(c) A system owner shall report turbidity measurements required by Env-Ws 380. 27 to the department within 10 days after the end of each month the system serves water to the public.

(d) The reporting in (c) above, shall be in lieu of the reporting specified in Env-Ws 380.21.

(e) The turbidity measurement report identified in (c) above, shall include:

(1) The total number of filtered water turbidity measurements taken during the month;

(2) The number and percentage of filtered water turbidity measurements taken during the month which are less than or equal to the turbidity limits specified in Env-Ws 380.2 7 (b); and

(3) The date and value of any turbidity measurements taken during the month which exceed one NTU for systems using conventional filtration treatment or direct filtration, or which exceed the maximum level set by the department under Env-Ws 380.2 7(g).

(f) A system owner shall maintain the results of individual filter monitoring taken under Env-Ws 380.2 7 for at least 3 years.

(g) A system owner shall report to the department that it has conducted individual filter turbidity monitoring under Env-Ws 380.2 7 within 10 days after the end of each month the system serves water to the public.

(h) A system owner shall report to the department individual filter turbidity measurement results taken under Env-Ws 380.2 7within 10 days after the end of each month the system serves water to the public only if measurements demonstrate one or more of the conditions identified in (l)(1) through (l)(10) below.

(i) The owner of a system that uses lime softening may submit to the department a written request to exceed the levels specified in (l)(1) through (l)(9) below.

(j) The written request shall include:

(1) The system name;

(2) The system EPA number; and

(3) Documentation that the turbidity levels in individual filters are due to lime carryover only and not due to degraded filter performance.

(k) The department shall respond to the request in writing and shall approve the request if the system demonstrates that higher turbidity levels in individual filters are due to lime carryover only and not due to degraded filter performance.

(l) The system owner shall report to the department individual filter turbidity as follows:

(1) For any individual filter, or for systems serving fewer than 10,000 people with 2 filters that monitor combined filter effluent in lieu of individual filters, that has a measured turbidity level of greater than 1.0 NTU in 2 consecutive measurements taken 15 minutes apart, the system owner shall report:

a. The filter number;

b. The turbidity measurement;

c. The date(s) and times on which the exceedance occurred; and

d. The cause, if known, for the exceedance;

(2) If the system is not able to identify an obvious reason for the abnormal filter performance:

a. A filter profile for the filter within 7 days of the exceedance; and

b. Report to the department that the filter profile has been produced;

(3) For any individual filter that has a measured turbidity level of greater than 0.5 NTU in 2 consecutive measurements taken 15 minutes apart at the end of the first 4 hours of continuous filter operation after the filter has been backwashed or otherwise taken offline:

a. Filter number;

b. Turbidity measurement; and

c. Date(s) and times on which the exceedance occurred;

(4) A system owner shall produce:

a. A filter profile for the filter within 7 days of the exceedance if the system is not able to identify a reason for the abnormal filter performance; and

b. Report to the department that the filter profile has been produced; or

c. Report the reason for the exceedance.

(5) For any individual filter, or for systems serving fewer than 10,000 people with 2 filters that monitor combined filter effluent in lieu of individual filters, that has a measured turbidity level of greater than 1.0 NTU in 2 consecutive measurements taken 15 minutes apart at any time in each of 3 consecutive months, the system owner shall report to the department the:

a. Filter number;

b. Turbidity measurement; and

c. Date(s) and times on which the exceedance occurred;

(6) The system owner identified in (l) (5) above, shall:

a. Conduct an assessment, as in (p) below, of the filter within 14 days of the exceedance if a CPE as specified in (q) below, is not required;

b. Submit the assessment by the tenth of the following month unless the assessment was triggered during the last four days of the month then 14 days would apply.

c. In addition, systems serving fewer than 10,000 with 2 filters that monitor CPE in lieu of individual filters shall conduct an assessment on both filters; and

d. Report to the department that the assessment was conducted;

(7) For any individual filter, or systems serving fewer than 10,000 with 2 filters that monitor combined filter effluent in lieu of individual filters, that has a measured turbidity level of greater than 2.0 NTU in 2 consecutive measurements taken 15 minutes apart at any time in each of 2 consecutive months, the system owner shall report to the department the:

a. Filter number;

b. Turbidity measurement; and

c. Date(s) on which the exceedance occurred;

(8) The owner of a system serving at least 10,000 people identified in (7) above shall:

a. Arrange for a CPE by the department, no later than 30 days following the exceedance informing the department the CPE is required and the date that it was triggered; and

b. Have the evaluation completed and submitted to the department no later than 90 days following the exceedance;

(9) The owner of a system serving less than 10,000 people identified in (7) above shall:

a. Arrange for a CPE by the department, no later than 60 days following the exceedance informing the department the CPE is required and the date that it was triggered; and

b. Have the evaluation completed and submitted to the department no later than 120 days following the exceedance;

(10) If a CPE has been completed by the department or a third party approved by the department as stated in (m) through (o) below within the 12 prior months or the system and department are jointly participating in an ongoing CTA project at the system, a new CPE shall not be required.

(m) A system owner in (l)(8) above may submit to the department a written request to use a third party to perform the CPE.

(n) The written request shall include:

(1) The system name;

(2) The system EPA number; and

(3) The name, address, and telephone number of the person performing the CPE.

(o) The department shall respond to the request in writing and shall approve the third party request if the third party meets the criteria set forth in Env-Ws 601.05.

(p) The assessment required under (l)(6) above, shall include the following:

(1) An assessment of filter performance;

(2) A development of a filter profile;

(3) An identification and prioritization of factors limiting filter performance;

(4) An assessment of the applicability of corrections;

(5) A filter assessment report; and

(6) The date that the assessment was triggered and the date that it was completed.

(q) A CPE required in (l)(8) above, shall include the following:

(1) An assessment of plant performance;

(2) An evaluation of major unit processes;

(3) An identification and prioritization of performance limiting factors; and

(4) An assessment of the applicability of CTA.

(r) If at any time the turbidity level exceeds 1 NTU in representative samples of filtered water in a system using conventional filtration treatment or direct filtration, the system owner shall notify the department as soon as possible but no later than 24 hours after the exceedance is known.

(s) If at any time the turbidity level in representative samples of filtered water exceeds 5 NTU for filtration treatments other than conventional filtration treatment and direct filtration the system owner shall inform the department as soon as possible, but no later than 24 hours after the exceedance is known.

(t) If a system is subject to disinfection profiling pursuant to Env-Ws 380.24 and Env-Ws 380.25, the system shall report the following information:

(1) Results of optional monitoring which show TTHM levels < 0.064 mg/L and HAA5 levels < 0.048 mg/L if the system wishes to forgo profiling, or that the system has begun disinfection profiling by:

a. Pursuant to 40 CFR 141.532(a), beginning July 1, 2003 for systems serving 500-9,999; and

b. Pursuant to 40 CFR 141.532(a), beginningJanuary 1, 2004 for systems serving fewer than 500.

(u) A system owner shall maintain the results of a disinfection profile, including raw data and analysis, indefinitely.

(v) If a system is subject to disinfection benchmarking requirements set forth Env-Ws 380.26, the system shall report the following information to the department prior to the system changing its disinfection practice:

(1) A description of the proposed change in disinfection;

(2) T he system's disinfection profile for giardia lamblia and disinfection benchmark; and

(3) An analysis of how the proposed change will affect the current levels of disinfection.

(w) A system owner shall maintain the results of a disinfection benchmark, including raw data and analysis, indefinitely.

N.H. Admin. Code § Env-Ws 380.28

#7754, eff 8-21-02; ss by #8352, eff 5-14-05 (formerly part of Env-Ws 380.30)