Facility Plan
Introduction
1. Background
2. Evaluation
3. Conveyances

4. RTF
5. Schedule
Appendices

Midland Ave Regional Treatment Facility & Conveyances—Facility Plan, Jan 2003
by Environmental Engineering Associates, LLP
for Onondaga County Department of Water Environment Protection

4. Midland Avenue RTF

Quick reference
— 4.1 Description of facilities and operation
— 4.2 Design flow rates
— 4.3 Preliminary basis of design

This section provides a brief summary of the facilities and operation, design flow rates, and preliminary basis of design for the Midland Avenue RTF.

4.1 Description of facilities and operation

The purpose of the Midland Avenue RTF is to provide high-rate treatment, including floatables removal, settleable solids removal, and disinfection of CSOs up to the one-year design storm event.

As shown on Figure 3-1, the RTF will be located in the vicinity of Oxford and Blaine Streets on the east side of Onondaga Creek in the southern section of the City of Syracuse.

Flows from the Midland Avenue Conveyances/Off-Line Storage Facility will discharge to the RTF, which will include the following treatment processes:

All treatment components will be designed in accordance with the latest edition of the Recommended Standards for Wastewater Facilities (Ten States Standards).

Figure 4-1 represents a preliminary hydraulic profile for the RTF.

The RTF process flow units will provide storage volume, in addition to the Midland Avenue Conveyances and Off-Line Storage Facility, for combined sewer flows. Following the one-year design storm event, the combined sewer flow stored in the RTF and Conveyances/Off-Line Storage Facility (total available storage volume equals 8.45 MG) will be conveyed back to the County's MIS for subsequent treatment at Metro.

4.2 Design flow rates

The proposed Midland Avenue RTF will be designed to convey and provide treatment up to the one-year design storm event. Based on the intended closure of select existing CSOs (see Section 2.2) and the RTF Hydraulic Evaluation (Section 2.3), the required influent pumping rate of the RTF is 330 cfs. This influent pumping rate allows for maximizing the storage in the Conveyances/Off-Line Storage Facility and prevents overflows from the remaining CSOs in the Midland Avenue service area (i.e., CSOs 039, 042, and 044; RTF emergency controlled diversion) up to the one-year design storm event.

4.3 Preliminary basis of design

Appendix H presents a preliminary basis of design for the key components of the Midland Avenue RTF.