Excavation Dewatering, Hydrostatic/Aquifer Pump Test General Permits

Highlights

On June 30, 2014 ADEC issued general permits for Excavation Dewatering (AKG002000) and Hydrostatic & Aquifer Pump Testing (AKG003000) General Permits, that are effective August 1, 2014.

AKG002000 – Excavation Dewatering General Permit. 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 does provide 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. The special conditions will provide assurance that the dewatering activities does not pull contamination from known contaminated sites.

AKG003000 – Hydrostatic Testing General Permit. 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.

AKG003000 – Aquifer Pump Testing General Permit. This General Permit provides discharge authorization to entities conducting aquifer pump testing in support of mineral mining development and exploration. 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 Testing Water?

Review the Excavation Dewatering NOI submission flow chart or the Hydrostatic/Aquifer pump testing NOI submission flow chart to determine if permit coverage is required. Information about either mapped contaminated sites or identified large groundwater plumes can be viewed by accessing the first two items in the "CSP Resources" box. Once you have determined general permit coverage is required for your discharge please do the following:

  • Obtain and read the entire Excavation Dewatering or Hydrostatic/Aquifer Pump Testing general permit.
  • Develop a BMP Plan in accordance to 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 either by hardcopy or electronically
    • With a paper NOI submit a check payable to the "State of Alaska" for the amount of the general permit authorization found in the DEC permit fees table
    • Submit a certified BMP plan with the completed NOI and payment.
  • Upon receipt of a DEC authorization letter the applicant will be granted a permit tracking number granting them authority to discharge.

Contacts

For more information, please contact:

Jim Rypkema Storm Water – Wetlands Program Manager
ADEC, Div of Water
555 Cordova Street
Anchorage, AK 99501
Office: 907-334-2288 | Fax: 907-269-3487
Email: Jim.Rypkema@alaska.gov
Angela Hunt Environmental Program Specialist IV
ADEC, Div of Water
555 Cordova Street
Anchorage, AK 99501
Office: 907-269-7599 | Fax: 907-269-3487
Email: Angela.Hunt@alaska.gov