Section Env-Dw 710.10 - Compliance Determinations for Radionuclides(a) The department shall determine compliance with Env-Dw 703 based on the analytical results obtained at each sampling point.(b) Subject to (k) below, for a CWS at which the required monitoring is annual or less frequently, if the result of a sample from one sampling point exceeds an MCL, the CWS O/O shall collect a confirmation sample within 14 days.(c) The confirmation sample shall: (1) Be a new sample collected under the same contributing conditions and at the same sampling point as the original sample; and(2) Be analyzed within 45 days of collection.(d) The results of the confirmation sample shall be averaged with the initial sample results and the average shall be used to determine compliance.(e) If the average exceeds the MCL, the CWS shall be deemed in violation of the MCL.(f) To determine compliance with the MCLs listed in Env-Dw 703, averages of data shall be used, rounded to the same number of significant figures as the MCL for the substance in question.(g) For a CWS at which the required monitoring is more frequent than once per year, the department shall determine compliance with the MCL based on a running annual average at each sampling point, as follows:(1) If the running annual average of the sample results at any sampling point is greater than the MCL, then the CWS shall be deemed out of compliance with the MCL; and(2) If any sample result is more than 4 times the MCL at any sample point, the CWS shall be deemed out of compliance with the MCL immediately.(h) The CWS O/O shall include the results of all samples taken and analyzed to determine compliance, even if that number is greater than the minimum required.(i) If a sample result is less than the detection limit, the result shall be deemed to be zero for purposes of calculating the running annual average.(j) If the MCL for the radionuclides set forth in Env-Dw 703 is exceeded, the CWS O/O shall notify: (1) The department, pursuant to Env-Dw 710.11; and(2) The public, as required by Env-Dw 800.(k) If results from the sampling point or the contributing sources have historically demonstrated the presence of the radionuclide, then:(1) A confirmation sample shall not be required; and(2) The monitoring frequency for the approved sampling point shall be increased to quarterly for that contaminant.N.H. Code Admin. R. Env-Dw 710.10
(See Revision Note #1 at chapter heading for Env-Dw 700) #9700, eff 5-1-10
Amended by Volume XXXV Number 06, Filed February 12, 2015 , Proposed by #10771, Effective 2/1/2015, Expires2/1/2025.Amended by Volume XXXVIII Number 50, Filed December 13, 2018, Proposed by #12668, Effective 1/1/2019, Expires 1/1/2029.