D&B’s unique engineering approach to combined sewer/treatment systems is the result of extensive design and practical operational experience, ranging from conducting combined sewer overflow surveys to complete alternative rehabilitation analyses.
Developing a cost-effective CSO plan requires a basic understanding of the combined sewer collection/treatment system, its impact on local waterways and available CSO control technologies. D&B’s approach typically includes:
- Conducting an informal kickoff meeting.
- Review of relevant State regulations, water quality impairments, prior studies of the collection or treatment system and existing permits or consent orders.
- Evaluation of the existing sewer system and wet weather operation of the wastewater treatment plant.
- Modeling of the collection system and wastewater treatment facility as appropriate.
- Development of a practical cost-effective control plan that will be amenable to future regulatory requirements in this evolving environment.
D&B’s approach covers each aspect of the combined sewer system. Owner preferences for specific alternatives are incorporated into alternatives. Regulatory compliance milestones are factored into implementation schedules. The final product provides cost-effective solutions to help achieve water quality standards addressing impacts resulting from combined sewer discharges.