Section Env-Dw 709.21 - Sample Volume and Collection Protocol(a) A standard sample volume of 100 ml shall be used for bacteria analysis, regardless of the analytical method used.(b) The time from sample collection to initiation of test medium incubation shall not exceed 30 hours.(c) Bacteria samples shall be analyzed for the presence or absence of total coliforms and E. coli.(d) Bacteria samples may be analyzed for total coliform density.(e) Unless a PWS disinfects on a regular and continuous basis, chlorine or other disinfectants shall not be added to the PWS within one week prior to the time when bacterial test samples are scheduled to be collected. If disinfection is necessary to protect public health within one week of a bacterial test, such treatment shall be described on the sample identification form. Failure to report disinfection occurring within one week on the sample information form shall be considered misrepresentation of the sample.N.H. Admin. Code § Env-Dw 709.21
Derived From Volume XXXV Number 06, Filed February 12, 2015 , Proposed by #10771, Effective 2/1/2015, Expires2/1/2025.