Section Env-Dw 712.12 - Revised Monitoring for SOC Contaminants(a) If any SOC listed in Env-Dw 705.02 is detected in any sample, the department shall revise the sampling requirements to quarterly for that contaminant at each representative sampling site.(b) The revised monitoring schedule for each source for the particular contaminant shall continue until the concentration of the contaminant in each source is reliably and consistently below the MCL.(c) The O/O may submit a written request as specified in (d), below, for the monitoring frequency to be reduced after a minimum of 4 consecutive quarterly samples for surface water systems or 2 consecutive quarterly samples for groundwater systems.(d) A written request submitted pursuant to (c), above, shall contain: (2) The PWS identifier for the PWS;(3) A summary of all sampling results; and(4) Whether any type of treatment to reduce SOC contaminants has been or is being used by the PWS.(e) The department shall reinstate annual monitoring for SOC contaminants in response to a request submitted pursuant to (d), above, if the department determines that: (1) Based on 4 consecutive quarterly samples, the level of SOC contaminant(s) previously detected is reliably and consistently below the MCL; and(2) The PWS is not operating any type of treatment to reduce the amount of SOC contaminants.(f) A PWS that monitors annually shall monitor during the quarter in which the highest analytical results occurred.(g) A PWS which has 3 consecutive annual samples with no detection of an SOC contaminant may apply to the department for a waiver as specified in Env-Dw 712.21.N.H. Code Admin. R. Env-Dw 712.12
(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.