General Permit for In Situ Remediation
A registration must be submitted to the Department and may need to be approved for activity to be authorized pursuant to these general permits. Qualitative or quantitative evidence of pollution is required for any authorization pursuant to a general permit for in-situ remediation. The general permits allow for DEEP issuance of a certificate of coverage in lieu of an approval of registration for authorization of certain activities, and also in some cases, provides for limited self-implementation upon registration.
Groundwater monitoring is typically required, especially for potentially affected drinking water supply wells. The monitoring objective is to document that groundwater quality outside the delineated zone of influence is not affected. Additional monitoring may be needed to verify that remedial objectives are met. The environmental professional is required to evaluate monitoring data to determine and report any indications of unexpected outcomes, and mitigation is required for adverse conditions caused by the discharge. Reporting and recordkeeping requirements for discharge and monitoring activities are specified, and combined reporting is allowed when reporting is also required under DEEP remedial program requirements.
In Situ Groundwater Remediation: Enhanced Aerobic Biodegradation (DEP-REM-GP-001)
The General Permit for In Situ Groundwater Remediation: Enhanced Aerobic Biodegradation authorizes oxygenation of groundwater at a controlled rate to enhance in situ aerobic degradation of organic pollutants and allows the use of several different sources of oxygen and delivery methods. Supplemental nutrients or cultured bacteria may also be added under the general permit framework. Chemical oxidation of pollution is not authorized under this general permit; and the permit incorporates limits on ozone and hydrogen peroxide to ensure their use solely as an oxygen source for biodegradation.