Section Env-Wq 402.24 - Groundwater Discharge Permit Compliance Criteria(a) Domestic wastewater shall receive primary treatment by settling of solids in subsurface disposal systems and at least secondary treatment as defined in 40 CFR 133 for other disposal methods, before discharge to the ground or to groundwater.(b) Municipal wastewater, alone or in combination with domestic wastewater, shall receive treatment in compliance with RSA 485-A:13, I(a) before being discharged to the ground or to groundwater.(c) Non-domestic wastewater, alone or in combination with domestic wastewater, shall be treated by BAT before being discharged to the ground or to groundwater.(d) Except as provided in Env-Wq 402.251 for 1,4-dioxane, perfluorooctanoic acid, perfluorooctane sulfonic acid, perfluorononanoic acid, and perfluorohexane sulfonic acid, no discharge shall cause the groundwater quality criteria set forth in Env-Wq 402.04 to be violated at any point beyond the boundary of a groundwater discharge zone.(e) No discharge shall cause or contribute to a violation of surface water quality standards set forth in RSA 485-A or Env-Wq 1700.(f) Subject to Env-Wq 402.251, the concentration in treated wastewater to be discharged to groundwater of the contaminants listed in Table 402-2, below, shall not exceed the specified concentration: Table 402-2: Maximum Concentration of Certain Contaminants in TreatedWastewaterDischargedtoGroundwater
Contaminant | Maximum Concentration |
1,4-dioxane | 2 µg/L |
Perfluorohexane sulfonic acid (PFHxS) | Twice the AGQS established in Env-Or 603.03 |
Perfluorononanoic acid (PFNA) | Twice the AGQS established in Env-Or 603.03 |
Perfluorooctane sulfonic acid (PFOS) | Twice the AGQS established in Env-Or 603.03 |
Perfluorooctanoic acid (PFOA) | Twice the AGQS established in Env-Or 603.03 |
N.H. Code Admin. R. Env-Wq 402.24
(See Revision Note at part heading for Env-Wq 402) #8955, eff 7-26-07
Amended by Volume XXXVI Number 10, Filed March 10, 2016, Proposed by #11036, Effective 3/1/2016, Expires 3/1/2026.Amended by Volume XXXVIII Number 28, Filed July 12, 2018, Proposed by #12553, Effective 9/1/2018, Expires 9/1/2028.Amended by Volume XXXIX Number 32, Filed August 8, 2019, Proposed by #12836, Effective 9/30/2019, Expires 9/30/2029.