Excavation Dewatering, Hydrostatic, and Aquifer Pump Test General Permits
On June 30, 2014 DEC issued general permits for Excavation Dewatering (AKG002000) and Hydrostatic & Aquifer Pump Testing (mineral mining only) General Permits, with effective date of August 1, 2014.
Dewatering discharges eligible for coverage under this general permit consist of water pumped from excavation areas through the use of temporary dewatering wells or submersible pumps to lower the water table to support a construction activity. The dewatering of accumulated groundwater and storm water that accumulates within an excavation area is an authorized discharge under the permit. The permit provides discharge authorization for dewatering conducted within 1,500 feet of a permit defined “DEC-identified contaminated site” although special permit conditions apply and additional requirements may be added in the discharge authorization.
This General Permit provides discharge authorization to entities conducting hydrostatic testing. Hydrostatic discharges including flushing that consist of either potable or non-potable water discharges used to pressurize a tank or vessel to conduct leak detection tests.
This General Permit provides discharge authorization to entities conducting aquifer pump testing in support of mineral mining development and exploration only. Discharges that are authorized under AKG003000 consist of groundwater pump tests to conduct water quality, water quantity tests or hydrogeological investigations and discharged to either the surface or to a water body in support of mineral mining development and exploration. The primary pollutants would be suspended solids, dissolved solids, and potentially naturally occurring trace metals.
What are the permitting requirements to discharge excavation dewatering or hydrostatic / aquifer pump test (minineral mining exploration and development) test water?
- Obtain and read the entire Excavation Dewatering or Hydrostatic/Aquifer Pump Testing general permit.
- Develop a BMP plan in accordance with Permit Part 2.9. The BMP plan is a critical component of the permit to provide assurance all wastewater will be properly managed, treated, and discharged in accordance to the permit.
- Submissions to DEC
- Submit an NOI (preferred - via the Online Application System (OASys) - APDES eNOI)
- Pay permit fee (see permit fee table)
- Submit a certified BMP plan with completed NOI and permit fee
- Upon receipt of a DEC authorization letter, the applicant will be given a permit authorization tracking number granting them authority to discharge.