NC0020605_Additional Notes_20190918

TY
September 18, 2019
Mr. Joe Corporon
THENCDEQ, Division of Water Resources
W O OT E N Water Quality Permitting
Surface Water Protection Section-NPDES
COMPANY 512 N. Salisbury Street, 9th Floor-Archdale Building RECEIVED
Raleigh,North Carolina 27604
Re: NPDES Permit Renewal - additional notes SEP 2 7 1019
NPDES Permit No. NC0020605 NCDEQIDWRINPDES
Town of Tarboro,North Carolina
Dear Mr. Corporon:
On May 17, 2019, we submitted a NPDES permit renewal on behalf of the
Town of Tarboro. Since that submittal the Town installed a second ultrasonic
meter to measure flow at the end of the second chlorine contact train. This
allows adding the flow from the two ultrasonic meters to provide a total
effluent flow. The NPDES permit allows reporting of influent or effluent
flow. This change allows the Town to report effluent flow, if so desired by the
Town.
In addition, the Town has purchased five (5) floating aerators to replace the
existing four (4) floating aerators in the sludge holding lagoon. The existing
sludge holding lagoon is used to store already digested sludge until it is land
applied and is not considered a treatment unit. A new brand of aerator (i.e.
"Blue Frog") is being purchased with the aim of lowering energy costs and
reducing maintenance requirements due to the features of the new aerators. A
manufacturer sheet on the Blue Frog unit is attached. Four of the five aerators
would be adjacent to former location of the existing aerators and the fifth in
the center of the basin.
Neither of these changes constitutes any change in any treatment process in
terms of meeting permit limits. If you should have any questions about the
renewal applications,please contact our office at(252) 757-1096.
Best regards,
THE WOOTEN/ 1 PANY
By: aqii
Carl Scharfe, PE
919-828-0531
120 North Boylan Avenue
Raleigh,NC 27603-1423
919.828.0531 Enclosures
Fax [phone] cc: Troy R. Lewis, Town of Tarboro
www.thewootencompany.com

PRODUCT SPECIFICATION — BLUE FROG CIRCULATOR
Description: An efficient mixer and passive aerator that provides up to 7mm gallons per day flows
and has the ability to layer the treated water.
41111Product Description
1111111
The Blue Frog is our base circulator. It is an
efficient mixer and passive aerator that
provides up to 7mm gallons per day flows and
has the ability to layer the treated water.
Note: All 3 HP motors should be reversed for 60 seconds a couple of times a week in order to
release any trapped inorganics.
Product Features
• Increases biological activity
• Creates an environment that propagates facultative bacteria
• Digests sludge in situ
• Moves up to 7 MGD utilizing only a 3 HP motor
• Only requires an engineered float depth of 3 1/2 feet
• Impeller runs clockwise(2 MGD)or counter clockwise(7 MGD)
• Runs on a 3 HP motor that has a rated amperage draw of 4.5 at 480V(actual amp draw is 3.5)
• Dual-direction impeller
• Requires engineered float depth of 3 1/2 feet
Motor Manufacturer
• 3 Horsepower motor manufactured by Nord Gear Corporation
• Nord Motor/Gearbox Product Code: SK2282AZSH VL-100LP/4 CUS RD 54358
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Version I

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Version 1

LDPE Plastic with UV protection with stainless steel
Composition attachments.
Unit Height 5' 3'"
Unit Weight 520#
Unit Diameter 8'
Output Shaft 144 Fiber(HD)or 208 Stainless Steel
150 RPM, 1,770 motor RPM/ 12 1 gearbox reduction
Speed =149.8(actual ratio 11.81:1)
Flow Types Forward (mix); Reverse(aeration)
Oxygen Transfer Rates
(standardized test): 11.4lb U_/hp'hr
Direct (mix mode) 7,000,000 gpd
Reverse (aerate mode) 2,000,000 gpd
32"with no intake (vertical)
Standard Float Depth 57" including the intake(horizontal)
Manufacturer for 3 Horsepower Motors Nord Gear Corporation
Material—Steel (Components: gear wheels, shafts rolling
Gear Housing bearing,parallel keys, snap rings, spacers,shims)
Seals Cast iron or aluminum
Coupling components Elastomers with some steel
Housing Gaskets and Flat Oil Seals Plastic or Elastorner with steel
Mobil SHC 630 Full Synthetic or equivalent — a high grade
synthetic oil. Pump out and replace oil with @ two (2)
quarts of Mobil SHC 630 full synthetic oil (or equivalent),
Gear Oil using a hand or electric pump.
Gear Motor 3 HP, 1,770 RPM, 3 Phase
' 2
Version I

Amps 3.84 Amps/460 Volt or 7.68 Amps/230 Volt
SF 1.15
11.81:1 (Unless otherwise noted below,the following
NORD gear reducers are shipped from the factory with a
pre-determined oil fill level in accordance to the specified
reducer size and mounting position. For additional
information, please refer to the "Oil Plug and Vent
Gear Reduction Locations"documentation for your gear unit).
SF 2.7
Lubrication Change oil in gear reducer 1 time per year
Bearing and Bearing Lube Not required
All 3 HP Motors 4.5-amps 12-4 SOOW (equal or better)
Corrosion-resistant, industrial cord with molded, weather,
and watertight connectors.
Wiring/Cords Required by the contractor Note: Lightning Protection is required.
The custom weatherproof control boxes"shown",mounted
on a permanent panel(provided by customer). Control box
contains:
- Necessary overload and phase protection.
- Push button on/off switches.
- Reverse capability.
- Box disconnects.
Pre-Wired Panel Boxes Provided by Blue Frog Electrical cables will run from the (provided) pre-wired
Technologies LLC panel boxes to the installed Frogs.
Overload protection is required on all Blue Frog units. As
per section 430, 210, 19Z, NFPA 70. Overloads should be
set at a maximum of 4.5 amps at 460 volt or 9 amps © 230
volt. Proper circuit protection is required. 6 amp time delay
fuses should be used @ 460 volt or amp time delay fuses @
230 volt. Or, a 15-amp circuit breaker trip rating should be
used on either voltage. Insulated ring tongue connections
are recommended for making connections to the terminal
Overload Protection block. Grounding per NFPA 70 Section 250.
Version