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DETAILED SPECIFICATIONS - SUBMERSIBLE PUMP STATION - 1






DETAILED SPECIFICATIONS - SUBMERSIBLE PUMP STATION


INDEX





Paragraph

Number


2-10-1
General

2-10-2
Pump Capacity

2-10-3
Pump Design

2-10-4
Construction

2-10-5
Mounting

2-10-6
Access covers

2-10-7
Wet Well

2-10-8
Pump Control Panel

2-10-9
Remote Telemetry System Panel

2-10-10
Liquid Level Controls

2-10-11
Piping and Valves

2-10-12
Hose Bibb with Backflow preventer

2-10-13
Manufacturer's Representative

2-10-14
Field Test

2-10-15
Spare Parts

2-10-16
Manuals

2-10-17
Guarantee

2-10-18
Submittals





DETAILED SPECIFICATIONS - SUBMERSIBLE PUMP STATION - 2




DETAILED SPECIFICATIONS - SUBMERSIBLE PUMP STATION


2-10-1 GENERAL

The Contractor shall furnish and install submersible wastewater pumping stations
consisting of submersible pumps, controls, hatch covers, fast-out assemblies, guide
rails, liquid level controls, panel, electrical connections, meter base, concrete wet
well, concrete valve box, driveway access, landscaping and all necessary
appurtenances, as shown on, or intended by the drawings and specified herein,
complete and ready for operation.

2-10-2 PUMP CAPACITY

Pumps shall be as specified by the drawings or an approved equal. The product named is
to establish a standard of quality, system operating characteristics, and dimensional
constraints. Pumps by other manufacturers may be submitted to the Engineer for
approval provided they are of the same or better standard of quality, produce the
same system operating characteristics, and do not significantly alter the dimensional
constraints. Any additional engineering costs resulting from the use of a pump by
another manufacturer shall be paid by the Contractor.

2-10-3 PUMP DESIGN

Each pump shall be designed with a close-coupled electric motor which permits continuous
operation with the pump totally submerged or with the motor completely removed
from the pumped media.

2-10-4 CONSTRUCTION

All major parts, such as the pump casing, seal housing, motor housing, motor and cap,
sliding bracket, and impeller, shall be of gray iron and shall be painted with a red
primer and finished with an epoxy acrylic paint. All nuts, bolts, and miscellaneous
hardware in contact with pumped material and inside wet well shall be stainless
steel (Type 316), unless otherwise indicated on plans.

Each pump shall be provided with a mechanical rotating shaft seal in an oil reservoir. The
seals shall require neither maintenance nor adjustment, but shall be easily
inspected and replaceable. The impeller shall be capable of handling solids, fibrous
material, heavy sludge and other matter found in normal sewage applications. The
impeller shall be statically and dynamically balanced.


The electric motor shall be NEMA Design B with Class F insulation, and designed for
continuous duty. The cable entry seal design shall be such to insure a watertight
DETAILED SPECIFICATIONS - SUBMERSIBLE PUMP STATION - 3



and submersible installation. Pump motor cable installed shall be suitable for
submersible pump applications and this shall be indicated by a code or legend
permanently embossed on the cable. Cable sizing shall conform to NEC
sdp-specifications for pump motors and shall be sized to allow motor voltage
conversion without replacing the cable.

Each motor shall incorporate an ambient temperature compensated overheated sensing
device and a moisture sensing device wired in series. The protective devices shall
be wired into the pump controls in such a way that if either device operates, the
pump will shut down.

2-10-5 MOUNTING

The manufacturer shall provide cast iron fast-out fixtures to allow the pump to be installed
or removed without requiring personnel to enter the wet well. The fixtures shall
consist of a discharge elbow permanently mounted to the floor of the wet well, a
sliding guide bracket which shall be an integral part of the pump unit, two stainless
steel slide rails which will guide the pump into position, and stainless steel lifting
cable, as shown on the plans.

2-10-6 ACCESS COVERS

(a) Wet Well

The Contractor shall furnish and install aluminum access doors of the size and type shown
on the Drawings. Door leaf shall be 1/4-inch aluminum diamond pattern plate
reinforced to withstand a live load of 300 pounds per square foot. Access covers
shall be hinged and hasp-equipped, including stainless steel guide rail bracket and
holders for lifting cable and motor cable. Access cover shall be provided with
stainless steel hardware.

(b) Valve Box

The Contractor shall furnish and install aluminum access doors of the size and type shown
on the Drawings. Door leaf shall be 1/4-inch aluminum diamond pattern plate to
withstand a live load of 300 pounds per square foot. Access covers shall be hinged
and hasp-equipped.





2-10-7 WET WELL

(a) Concrete Wet Well
DETAILED SPECIFICATIONS - SUBMERSIBLE PUMP STATION - 4




Cylindrical concrete wet well (minimum 6'-O" diameter) shall be constructed of precast
reinforced concrete sections which conform to the requirements of ASTM
Designation C 478-78a. Portland cement shall be Type 11. A minimum of 2-inches
protective covering shall be maintained over the circumferential reinforcement in the
wall face closest to the wet well interior. Minimum wall thickness shall be as noted
on the Drawings. No lifting holes through the wet well structure will be permitted. All
grout used for sealing around pipe openings shall be of a type acceptable to the
Engineer and designed for use in water. All openings and joints shall be sealed
watertight. Interior and exterior surfaces of the wet well shall be coated as shown
by the Drawings. Fillets within wet well shall be constructed with a minimum of 3000
psi concrete.

(b) Excavation and Backfill

Excavation shall be in accordance with the "Earthwork" section of these specifications.
Backfilling around the wet well structure will not be allowed until the concrete base
has hardened sufficiently to provide rigid support for both wet well and backfill, or if
precast wet well sections are used, the base section has been stabilized from any
horizontal or vertical movement, the work has been observed by the Engineer, and
the Engineer indicates that backfilling may proceed.

Backfill material shall be noncohesive, non-plastic material free of all debris, lumps, and
clods. Backfill material placed within one foot of the wet well structure shall not
contain any stones or rocks larger than 2-inches in diameter. No stones or rocks
larger than 6-inches in diameter will be permitted in any backfill.

Selected backfill material shall be placed in 18-inch layers evenly around the structure and
shall be compacted to a density of not less than 100 percent of the maximum
density as determined by AASHTO T-99.

2-10-8 PUMP CONTROL PANEL

(a) General

All electrical equipment and materials supplied by the Contractor shall be coordinated to
function according to the design indicated on the Drawings. All materials and
equipment shall be new and a standard product of the manufacturer. Where two or
more units of the same class of equipment are required, these units shall be
products of a single manufacturer. Equipment or materials found to be defective or
damaged shall be replaced or repaired by the Contractor at no additional cost to the
Owner.

DETAILED SPECIFICATIONS - SUBMERSIBLE PUMP STATION - 5



Electrical work shall be in accordance with the latest edition of the National Electric Code
and with all applicable local codes, regulations, and ordinances in effect at the place
of the work.

(b) Scope and Panel Operation

The control logic shall operate two electrical submersible pumps at the power
characteristics as specified.

The control logic shall provide for the operation of the lead pump under normal conditions.
If the incoming flow exceeds the pumping capacity of the lead pump, the lag pump
will automatically start to handle the increased flow. As the liquid level decreases,
the pumps will shut off at the elevations shown on the plans. In the event of a
malfunc+,-ion or a flow that exceeds the capacity of the pumus, a high level light
and audible alarm will be excited to indicate alarm cond-it.ions. A manual silencer
shall lock out the audible alarm, however, the ala-m lignt shall release only with the
correction of the high level condition.

Pumps shall alternate as lead and lag pumps on a continuous basis.

(c) Construction and Materials

The control panel shall be NEMA 3R of Type 304 stainless steel construction, with dead
front aluminum inner door, stainless steel hardware throughout, and mounted on
concrete posts as shown on the drawings.

The junction box shall be heavy duty plastic (English Electric type APO weathertight or
approved equal).

(d) Panel Exterior

Mounted on the exterior enclosure shall be an alarm light, a high water level audible alarm
with silencer bottom and a standby gene