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Midland Ave Regional Treatment Facility & Conveyances—Facility Plan, Jan 2003
by Environmental Engineering Associates, LLP
for Onondaga County Department of Water Environment Protection
Appendix H: Preliminary basis of design
Storm frequency, year - 1
Storm duration, hour - 2
Rainfall interval, minutes - 15
Peak influent design flow rate, cubic feet per second (cfs) - 330
Peak instantaneous flow rate (cfs) - 495
Total design storm volume, million gallons (mg) - 14.8
1. Tallman Avenue CSO Transmission Pipeline
Type - Pre-Stressed Concrete Cylinder Pipe (PCCP)
Diameter, inches - 84
2. Midland Avenue CSO Transmission Pipeline
Type - PCCP
Diameter, inches - 144
3. Bellevue Avenue CSO Transmission Pipeline
Type - PCCP
Diameter, inches - 66
Type - Manual
Location - Influent stilling well
Clear opening, inches 4
Number of units - 2 (one vertical, one inverted at 60 degs.)
Materials of construction - Aluminum or stainless steel
Length, feet - 42
Height, feet - 4 (vertical), 7 (inverted)
Type - Grit sump
Location - Influent stilling well
Grit Sump Dimensions, length x width x depth, feet - 42 x 5 x 3
Removal mechanism - Clamshell with overhead bridge crane
Disposal - Truck hauler
Estimated grit/debris quantity, cubic yards/year - 535
Pump type - Mixed or axial flow
Number of units - 3 (2 operating, 1 standby)
Capacity per unit, cfs - 170
TDH, feet - 24
Pump column diameter, inches - 48
Pump suction bell diameter, inches - 78
Motor horsepower - 600
Drive type - Constant speed
Motor voltage, volts - 460
Pump speed, rotations per minute (RPM) - 300
Potential manufacturers - Fairbanks Morse, Patterson
Type - Motor-operated sluice gate
Materials of construction - Fabricated stainless steel
Number - 2
Size, width x height, inches - 72 x 72
Potential manufacturers - Rodney Hunt, Fontaine
Type - USEPA swirl concentrator
Design settleable solids recovery, percent - 90
Number of units - 2
Capacity per unit, cfs - 170
Materials of construction - Reinforced concrete basin with coated steel internals
Inlet channel, Dl, inches - 72 x 72
Chamber diameter, D2, feet - 42
Scum ring diameter, D3, feet - 28
Overflow weir diameter, D4, feet - 23.3
Chamber depth, H, feet - 10.5
Basin volume, cubic feet - 12,640
Underflow pipe diameter, inches - 24
Overflow pipe diameter, inches - 72
Underflow rate, cfs (maximum) - 33
Percent of design peak influent flow - 5
Means of flow control - Submerged orifice
Discharge - Gravity sewer to main interceptor sewer
Diameter, inches - 24
Pump type - Submersible, recessed impeller, grit handling
Number of units - 3 (2 installed, 1 spare)
Design points - l.OOO gpm @ 41 feet, 1,800 gpm @44 feet, 2,600 gpm @ 48 feet
Pump discharge diameter, inches - 10
Motor horsepower - 60
Pump speed, RPM - 1,880
Drive type - Variable frequency drive
Potential manufacturers - Hayword Gordon, Wemco
1. Chlorination
a. Chlorination Chemical
Type - Liquid Sodium Hypochlorite
Design chemical strength, percent - 10
Chlorination Chemical Storage
Type - Vertical, cross-linked HDPE
Number of tanks - 2
Nominal capacity, gallons (each tank) - 2,000
Working volume, gallons (each tank) - 1,500
Potential tank manufacturer - Nalgene, Chem-Tainer
2. Dechlorination
a. Dechlorination Chemical
Type - Liquid Sodium Metabisulfite
Design chemical strength, percent - 38
b. Dechlorination Chemical Storage
Type - Vertical, cross-linked HDPE
Number of tanks - 2
Nominal capacity, gallons (each tank) - 500
Working volume, gallons (each tank) - 450
Potential tank manufacturer - Nalgene, Chem-Tainer
1. Chlorination
Dosage, mg/L - 14
Chlorination chemical feed point - Chlorination chamber of disinfection tank
Type of chemical feed pumps - Peristaltic, variable speed
Potential pump manufacturers - Watson Marlow/Bredel
Number of on-line chemical feed pumps - 2
Number of installed backup chemical feed pumps - 2
Total number of chemical feed pumps - 4
Design feed rate, gallons per hour - 630
Chemical feed pump capacity, gallons per hour - 1,386
Motor horsepower - 2
Number of chemical inductors - 2
Potential chemical inductor manufacturer - USFilter/Waterchamp
Motor horsepower - 75
2. Dechlorination
Dosage, mg/L - 11
Dechlorination - Dechlorination chamber of disinfection tank
Type of chemical feed pumps - Peristaltic, variable speed
Potential manufacturers - Watson Marlow/Bredel
Number of on-line chemical feed pumps - 1
Number of installed backup chemical feed pumps - 1
Total number of chemical feed pumps - 2
Design feed rate, gallons per hour 342
Chemical feed pump capacity, gallons per hour - 528
Motor horsepower - 15
Number of chemical inductors 2
Potential chemical inductor manufacturers - USFilter/Waterchamp
Motor horsepower - 75
3. Disinfection Control
Type - Oxidation Reduction Potential
Potential manufacturers USFilter/Stranco
4. Sample Pumps for Disinfection Control
a. Chlorination
Sample point location - Chlorination chamber of disinfection tank
Type of sample pump - Non-clog, submersible
Potential pump manufacturers - Flygt Pumps
Number of sample pumps for Chlorination control - 2 (1 uninstalled spare)
Design capacity range - 45 to 75 gpm
Motor horsepower - 1.8
Dechlorination
Sample point location - Dechlorination chamber of disinfection tank
Type of sample pump - Non-clog, submersible
Potential pump manufacturers - Flygt Pumps
Number of sample pumps for dechlorination control - 2 (1 uninstalled spare)
Design capacity range - 45 to 75 gpm
Motor horsepower - 1.8
Type - Cast in place, reinforced concrete, plug flow
Approximate area, square feet - 11 500
Design water depth, feet - 16.8
Approximate volume, cubic feet - 134,000
Length to width ratio - 31 to 1
Chlorination contact time @ 330 cfs, minutes - 5.0
Dechlorination contact time @ 330 cfs, minutes - 1.0
Method of washdown - Tipping buckets
Potential tipping bucket manufacturers - Waste Tech, John Meunier, GNA
Type - Reinforced concrete culvert with flexible flap valves
Location - Disinfection tank effluent
Design flow rate, cfs - 495
Dimensions, length x width x depth, feet - 49 x 16 x 11
1. Building
Foundation type - Reinforced concrete footing, walls, and slabs
Approximate area, square feet - 22,000
Architectural features - Concrete masonry block walls, flat roof
Roof type - Precast concrete T-beams and planks
2. Electrical/Instrumentation
Incoming power information - Primary metering, dual/redundant service with electrically operated fused switches
Primary voltage, kilovolts - 13.2
Switchgear voltage, volts - 4,160
Facility distribution - Dual/redundant transformers with electrically operated main and tie fused switches/switchgear Controls - Programmable logic controller based controls
with coordinated communication with existing/planned County systems
3. Heating
Type - Natural gas-fired, pulse-type hydronic boilers
Estimated heating load, million Btus - 3.0
4. Ventilation
Air changes per hour (ACPH) during event and occupied, wet areas - 12
ACPH during nonevent, wet well only - 2
Wet area exhaust - To odor control system
5. Odor Control System
Type - Activated carbon multiple canister system utilizing water regenerable carbon
Number of vessels - 3 (2 active, 1 backup)
Unit dimensions, length x width x height, feet - 32 x 6 x 11
Total air flow rate, cubic feet per minute - 56,500
Unit capacity, cubic feet per minute - 30,000
Potential manufacturers - Calgon Carbon
6. Noise Control Measures
Reduced noise generation will be criteria in selecting all equipment
Wall construction adjacent to spaces containing noise generating equipment (pump
room, odor control room, etc.) will employ noise dampening measures (acoustical block,
noise dampeners, etc.)
Acoustical louvers will be used for inlet louvers connected to spaces containing noise
generating equipment
Rooftop equipment (i.e., supply fans) will be housed in sound attenuating enclosures
Type - Reinforced concrete culvert with flexible flap valves
Location - Influent sump
Design flow rate, cfs - 1,000
Type - Cast-in-place, reinforced concrete
Approximate area, square feet - 28,800
Design water depth, feet - 17
Design volume, cubic feet - 335,000
Design volume, gallons - 2,500,000
Method of washdown - Flushing gates
Potential manufacturers GNA, Waste Tech
Type - Reinforced concrete slab, concrete masonry block walls
Approximate area, square feet - 4,000
Odor control system type Activated carbon multiple canister system utilizing water regenerable carbon
Air changes per hour (ACPH) during event - 6
Number of units 3
Unit dimensions, length x width x height, feet - 26 x 6 x 11
Unit capacity, cubic feet per minute - 22,000
Total air flow rate, cubic feet per minute 64,000
Potential manufacturers - Calgon Carbon
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Susan Miller, Project Deputy Director
Onondaga County Dept of Water Environment Protection