Section Env-Dw 712.26 - Confirmation Sampling for PFAS Contaminants(a) Subject to (c), below, if a PFAS contaminant is detected in a representative sample at a level greater than 50% of the MCL, the O/O shall: (1) Collect a confirmation sample under the same contributing conditions within 14 days of being notified of the result; and(2) Have the sample analyzed for the contaminant(s) detected.(b) If a confirmation sample is required pursuant to (a) above, the results of the initial and confirmation samples shall be averaged to determine compliance with the MCL specified in Env-Dw 705.06.(c) If results from the sampling point or the contributing sources have historically demonstrated the presence of that PFAS contaminant at a level greater than 50% of the MCL, then: (1) A confirmation sample shall not be required; and(2) The monitoring frequency for the approved sampling point shall be determined pursuant to Env-Dw 712.24 or Env-Dw 712.27, as applicable.N.H. Code Admin. R. Env-Dw 712.26
Derived from Volume XXXIX Number 32, Filed August 8, 2019, Proposed by #12838, Effective 9/30/2019, Expires 9/30/2029.