Section Env-Dw 302.15 - Proposal for Water Quality Sampling(a) The water quality sampling program required by Env-Dw 302.08(j) shall be designed and conducted to gather the information necessary to establish the water quality of each proposed new well and develop, if necessary, a contamination control program for the desired permitted production volume.(b) The water quality sampling program shall include the collection of one water quality sample from each test well at each of the following times during the pumping period: (1) Between the first and the fifth hour of the pumping period;(2) Midway through the pumping period; and(3) Within the last 3 hours of the pumping period.(c) The first 2 water quality samples collected shall be analyzed for the following parameters: (1) Volatile organic compounds;(5) Specific conductance;(d) The third sample shall be analyzed for: (1) Those parameters required to be monitored in groundwater systems per Env-Dw 707 through Env-Dw 713;(e) Samples shall be collected for microscopic particulate analysis within the last 24 hours of the pumping test if the location of the proposed new production well meets either of the following criteria: (1) For overburden wells, if the well is within 100 feet of the normal high water line of any surface water; or(2) For bedrock wells, if the well is within 200 feet of the normal high water line of any surface water.(f) Samples collected in accordance with (e), above, shall: (1) Be analyzed in accordance with the Consensus Method for Determining Groundwaters Under the Direct Influence of Surface Water Using Microscopic Particulate analysis (MPA), EPA 910/9-92-029F, USEPA 1992 or an equivalent method;(2) Be collected only after monitoring of screening parameters indicates stabilization in accordance with the following: a. For a period of no less than 10 hours, hourly screening of discharge water for pH, specific conductance and temperature does not vary by: 1. More than 0.2 standard units for pH;2. More than 3 percent for specific conductance; and3. More than 2 degrees Celsius for temperature; andb. Screening of the discharge water for pH, specific conductance and temperature shall continue throughout the duration of sample collection once stabilization in accordance with a., above, has been met; and(3) Include screening of pH, specific conductance and temperature in the surface water closest to the proposed new production well at the same monitoring frequency as the discharge water.(g) Proposed new production 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 production well and the surface water; and(2) Through water level monitoring performed during the pumping test in accordance with Env-Dw 302.14, a direct hydraulic connection does not appear to exist between the proposed new production well and the surface water.(h) All analyses shall be performed by a laboratory that is accredited for all applicable drinking water categories and methods in accordance with Env-C 300.N.H. Admin. Code § Env-Dw 302.15
(See Revision Note at part heading for Env-Dw 302) #9008, eff 10-19-07
Amended by, Volume XXXVI Number 14, Filed April 7, 2016, Proposed by #11061, Effective 4/1/2016, Expires 4/1/2026.