Section Env-Dw 305.15 - Proposal for Water Quality Sampling Program(a) The water quality sampling program required by Env-Dw 305.08(l) shall be conducted to demonstrate the water quality of each proposed new well.(b) The water quality sampling proposal shall include a description of how the applicant will: (1) Obtain a water sample from the well immediately prior to the cessation of pumping;(2) Store and transport the sample bottles to the laboratory;(3) Ensure that the water sample is analyzed for:a. Those parameters required to be monitored in groundwater systems per Env-Dw 707 through 713;d. Microscopic particulate analysis as specified in (c), below, if the location of the proposed new well meets one of the following criteria, unless exempted by (d), below: 1. For overburden wells, the well is within 100 feet of the normal high water line of any surface water; or2. For bedrock wells, the well is within 200 feet of the normal high water line of any surface water;(4) Ensure that the water sample is analyzed by a laboratory that is accredited for all applicable drinking water categories in accordance with Env-C 300; and(5) For well sites with specific water quality concerns, including those related to known or potential contamination sources, perform additional sampling and analyses to ensure acceptable water quality.(c) Samples for microscopic particulate analysis pursuant to (b)(3)d., above, shall: (1) Be collected during the last day of the pumping test;(2) Be collected only after screening the discharge water hourly, for a period of no less than 6 hours before the start of sample collection, for pH, specific conductance, and temperature;(3) Be analyzed in accordance with the US EPA 2004 Consensus Method for Determining Groundwaters Under the Direct Influence of Surface Water Using Microscopic Particulate analysis (MPA), MiC004B or an equivalent method;(4) Be screened for pH, specific conductance and temperature throughout the duration of sample collection; and(5) Include screening for pH, specific conductance, and temperature in the surface water closest to the proposed new well at the same monitoring frequency as the discharge water.(d) New wells shall be exempt from sampling for microscopic particulates if the applicant demonstrates through site-specific observations and monitoring that: (1) A continuous confining unit is present between the proposed new well and the surface water; and(2) Water level monitoring performed during the pumping test shows that a direct hydraulic connection does not appear to exist between the proposed new well and the surface water.N.H. Code Admin. R. Env-Dw 305.15
Adopted by, Volume XXXVI Number 14, Filed April 7, 2016, Proposed by #11062, Effective 4/1/2016, Expires 4/1/2026.