Section Env-Dw 709.13 - Sampling for Total Coliforms When Turbidity Exceeds One NTU(a) The owner of a PWS using surface water or groundwater under the direct influence of surface water that is not subject to the filtration requirements in Env-Dw 716 shall collect at least one total coliform sample at or before the first service connection each day the turbidity level of the source water, measured as specified in 40 CFR 141.22, exceeds one NTU.(b) The sample shall be analyzed for turbidity and for the presence of total coliforms.(c) When one or more turbidity measurements in any day exceed one NTU, the system owner shall collect a total coliform sample within 24 hours of the first NTU exceedance, unless the department determines that the system cannot have the sample analyzed within 30 hours of collection.N.H. Code Admin. R. Env-Dw 709.13
(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.