Individual NPDES Permits
While many facilities seek coverage through general stormwater permits, some comply with regulations through an individual stormwater permit that reflects the facility's unique permit conditions and limits. Examples of facilities that likely require an NPDES permit include a facility that discharges wastewater, a construction site, or a pretreatment operation. Individual NPDES permits are prepared with limits and conditions for specific facilities.
ADEQ manages four kinds of individual discharge permits. Point source dischargers are divided by municipal operation and industrial operation. Both of these permits require an additional state permit for construction of any new wastewater facilities. Pretreatment requirements are enforced as industrial discharge permits issued by ADEQ or by those Arkansas cities that have federal- and state-approved pretreatment programs.
All individual permits require public notices or public review. Find public notices of a specific individual permit:
Elements Necessary to Develop Most NPDES Permits
Applications vary according to facility, but all permits are developed from applicant information, regulatory requirements from APC&EC Regulation 6, and federal guidelines.
- Data and Information
Staff identifies all pollutants known or believed to be present in the effluent (the waste to be discharged).
A review is made of existing information in the application and in ADEQ files, such as effluent quality data, current permit conditions, inspections, construction permits, and compliance status.
Staff determines the applicability of EPA technology-based effluent guidelines.
- Effluent Limits
Staff determines the water quality-based effluent limits for pollutants required by EPA guidelines, as well as any additional pollutants believed to be present in the effluent. Water quality-based effluent limits take into account characteristics of the receiving stream, such as the low flow value and hardness of the stream at the point of discharge.
The permit is drafted with the effluent limits based on either the technology-based limits or water quality-based limits, whichever are more stringent.
- Schedule for Compliance
The permit may contain a time schedule for the permittee to achieve compliance with effluent limits that were either not included in the previous permit or are more stringent than the effluent limits in the previous permit.
This schedule of compliance is included in the permit only if it is determined that the permittee is unable to meet the limits at the time of permit issuance.
If the permit applicant is a new facility or an existing facility that is recommencing its discharge, the applicant is not allowed a schedule of compliance.