HomeMy WebLinkAboutCT 83-19; CALAVERA HILLS VILLAGE T; SEWER STUDY; 1986-04-01.'
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SEWER STUDY :
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Si CALAVERA HILLS
VILLAGE 'I T"
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April 1986
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PREPARED BY: Isidorà A. Panis
CHARLES W. CHRIS'IENSEN & ASSOCIATES
444 West "C" Street, Suite 400
San Diego., California 92101
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• Phone: (619) 232-7891
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JUL 11186
CALAVERA HILLS SEWAGE PUMP STATION NO. 2
SPECIFICATION INDEX
SECTION
NO. TITLE
I • General Requirements
II Package Pump System
III Standby Electric Power System
IV Surge Control Equipment
V Ultrasonic Flowrneter
VI Hazardous Gas Detection System
VII Valves and Miscellaneous Equipment
VIII • Generator Building
ix Protective Coatings •
X Reinforced, Cast-in-Place Concrete
I. GENERAL REQUIREMENTS
SUBMITTALS
DRAWINGS AND DATA
At least 30 calendar days before proceeding with procurement
of equipment, the Contractor shall submit to the Owner, for
, approval, eight complete sets of checked and coordinated data
on equipment which he proposes to' furnish for all equipment
specified in this section. , The data shall , include
manufacturer's name, equipment model 'number, ' catalogs,
specifications, descriptions, 'dimensions,' drawings,
photographs, wiring diagrams, installation and maintenance
instructions, and specific data as itemized below for the '
particular types of equipment. Where the data are in catalog
form or several items are listed on the same sheet, the
'equipment to be furnished shall be marked clearly and
prominently. All drawings shall' be made with the aid
of drafting equipment, to scale, and with neat lettering
(freehand sketches will not be acceptable). Drawings or
data reproduced by the "Thermofax" method of
duplicating will not be 'acceptable. The data shall be
furnished, in binders.
Data submitted separately will not be reviewed for approval
until receipt by the Owner of complete sets of checked and
coordinated data. Unchecked and uncoordinated drawings and
data will not be acceptable.
All resubmittal data shall also be submitted at one time in
binders.
Any procurement or fabrication
, of 'materials which is
performed prior to approval of data will be at the Contr-
actor's risk. The Owner shall have the right to require the
Contractor to make 'such changes in equipment which, he pro-
poses to furnish as the Owner determines necessary to conform
to the requirements and intent of these specifications.
Approval by the Owner of the Contractor's data shall not be
held to relieve the Contractor of any part of the Contractors
obligations to meet all the requirements 'of these specifica-
tions. '
In addition to the approval data referred to above, the
specific data required for the particular types of equipment
are:
1) Control Equipment. Electrical ratings, construc-
tion, and operation.
Air-handling Equipment. Construction, motor
horsepower, electrical rating, and manufacturer's
standard rating tables or curves indicating cubic
feet per minute, static pressure, 'brake horsepower,
and revolutions per minute.
Pumps. Performance data curves showing .head;
capacity, horsepower demand, and pump efficiency
over the entire operating range of the pump from
shutoff to maximum capacity. The equipment
manufacturer shall indicate separately the head,
capacity, horsepower' demand, overall efficiency,
•
• and minimum submergence required at the guarantee
•
•• • point. Performance requirements shall be as
defined in the Hydraulic Institute Standards.
I
A packaged two-stage lead/lag pumping system, consisting of
four pumps with pairs of pumps in series, is an acceptable
alternative to the single-stage system described herein. If
a two-stage system offers substantially better pump
efficiency, thereby requiring a smaller standby
engine-generator set and smaller pump control panel, Engineer
will at the Owner's direction, evaluate the present worth of
the resulting cost savings over the anticipated service life
of this facility and make recommendations to the Owner
regarding whether the proposed alternative two-stage system
should be approved.
II. PACKAGE PUMP SYSTEM
General
The Contractor shall furnish and install one factory-built,
automatic duplex lead/lag pumping system including all
equipment, labor and materials. The system shall be complete
with all needed equipment factory-installed and tested on a
skid mounted frame and shall suit the dimensions of the
drywell as shown on the drawings.
The principal items of equipment shall include two vertical,
close-coupled, motor driven, non-clog sewage pumps; valves;
internal piping; central control panel with circuit breakers,
motor starters and automatic pumping level controls;
lighting; sump pump; ventilator; dehumidifier and all
internal wiring, and appurtenances to provide for a complete
and operable pumping system.
These specifications describe equipment as manufactured by
Smith & Loveless Division, Ecodyne Corporation. . Equipment
proposed for substitution shall be superior or equal in
construction and/or efficiency to that described in the
specifications, and provide work space around equipment equal
to or greater than that shown on the drawings. Manufacturer
shall have at least five years of experience with similar
installations.
wce,7
tt/ ' If the engineer's approval is obtained for alternate.
equipment, the Contractor shall, at his own expense, make any
changes in the structures, building, piping or electrical
systems necessary to accommodate the equipment.. If.
engineering is required due to substitution of other
material, the Contractor shall pay all cost for such redesign
work including review and approval by Owner's engineering
representative.
PRE-BID FIELD CHECK OF SITE
The Contractor shall be responsible for visiting-the site of
the work prior to submitting a bid, examining all existing
conditions and ascertaining all necessary work entailed by
the plans and specifications. By submitting a bid for this
work, the Contractor shall be deemed to have made such
examination, and that he is familiar with and accepts all
conditions of the job and site.
OPERATING CONDITIONS
Each of the pumps shall be capable of 621 gpm of raw
unscreened sewage against a total dynamic head of 314 feet.
I
The level control switches shall operate the lead/lag pumps
as follows:
HWL ELEV 117.5 Lead Pump ON
HHWL ELEV 118.5 Lag Pump ON and High Water Alarm
LWL ELEV 116.0 Lag Pump OFF
LLWL ELEV 115.0 Lead Pump OFF
All openings and passages in both pumps shall be large enough
to permit the passage of a sphere 3-inches in diameter.
PUMP SKID MOUNTING CONFIGURATION
Pumps shall be mounted to the skid in a configuration that
provides a minimum 3 feet clearance between the closest pump
or motor 'components. A minimum 5' distance between pump
centerlines is indicated for this purpose. Greater spacing
between pump centerlines shall be provided only with
Engineer's prior approval.
The pump control panel shall not be mounted to the pump skid.
Rather, it shall be separately installed within the pump room
as indicated on the drawings.
The pump sytem shall be installed in a recessed area of the
pump room floor slab, as shown; such that the top surface of
the skid is a even with the top of the concrete floor slab.
PUMPS
The pumps shall be vertical, non-clog sewage pumps of heavy
cast iron construction especially designed for the use of
mechanical seals. In order to prevent seal damage caused by
lineal movement of the shaft, the bearing nearest the pump
impeller shall be locked in place so that end play is limited
to the clearance within the bearing. To minimize seal
failure resulting from shaft deflection in the mechanical
seal caused by the radial thrust of the pump, the shaft from
the top of the impeller to the lower bearing shall have a
minimum diameter of 1-7/8" for motor frame sizes 213 through
286; 2-1/8" for motor frame sizes 324 and 326; and 3" for
frame size 364 and larger. The motor shaft between bearings
shall be larger.
The bearing nearest the impeller shall be designed for the
combined thrust and radial load. The upper bearing shall be
free to move axially with the thermal expansion of the shaft
and shall carry only radial loads.
The shaft shall be a solid stainless steel shaft through the
pump and bottom bearing to eliminate corrosion within the pump
or the mechanical seal. Removable shaft sleeves will not be
acceptable unless the solid shaft under the sleeve meets the
specified minimum diameter.
The pump impellers shall be of the 'enclosed type made of
close-grained cast iron and shall be keyed and secured to the
motor shaft by a stainless steel cap screw equipped with a
Nylock or other suitable self-locking devise. The impeller.
shall not be screwed or pinned to the motor pump shaft and
shall be readily removable without the use of special tools.
Both the end of the shaft and the bore of the impeller shall
be tapered to permit easy removal of the impeller from the
shaft. To prevent the buildup of stringy materials grit and
other foreign particles around the pump shaft, all impellers
less than full diameter shall be trimmed inside the impeller
shroud. The shroud shall remain full diameter so that close
minimum clearance from the shroud to volute is maintained.
(In lieu of full diameter shrouds, stainless steel wear rings
may be furnished.) '
The motor shall be attached to the pump volute with a
one-piece cast iron adapter and backhead. The pump shall be
arranged so that the rotating element can easely be removed
from the volute without disconnecting the seal system or
electrical wiring or disassembling the 'motor, impeller,
backhead or seal, so that any foreign object may be removed
from the pump or suction elbow. Volute or suction elbow
clean-outs will not be an acceptable substitute.
The pump shaft shall be sealed against leakage. by a double
mechanical seal installed in a bronze seal housing
constructed in two sections with registered fit. The housing
shall be recessed into the pump backhead and securely
fastened thereto with stainless steel cap screws. The inside
of the seal housing shall be tapered to facilitate the
replacement of the seal parts. The seal shall be of double
carbon and ceramic construction with the mating 'surfaces
lapped to a flatness tolerance of one light band. The
rotating ceramics shall be held in mating position with the
stationary carbons by a stainless steel spring. The seal
housing with assembled parts, shall be so constructed as to
be readily removable from the shaft as a unit and shall be
provided with tapped jackscrew openings to assist in removing
it from the backhead.
The seal shall be pressurized and lubricated by water taken
directly from the pump backhead through a filter to the seal
housing and introduced between the upper and lower sealing
surfaces. The filter shall be of corrosion-resistant
materials and shall screen out all solids larger than 50
microns. The seal system shall contain a brass valve
connected near the top of the seal housing to permit the
relief of any air trapped in the seal unit. A manually
operated brass valve shall also be provided to vent the pump
volute.
The pump volute shall be free from projections that might
cause clogging or interfere with flow through the pump.
The rotating parts of each pump and its driving unit shall be
dynamically balanced by the manufacturer before final
assembly.
The pump shall be supported by a heavy cast iron base with
four legs to provide maximum rigidity and balance. The
height shall be sufficient to permit the use of, an increasing
suction elbow which shall be provided when the nominal pump
size is smaller than the suction line. The suction and
discharge openings shall be flanged, faced and drilled
125-pound American Standard.
F. MOTORS
The pump motors shall be vertical, solid shaft, NEMA P-base,
squirrel-cage induction type, suitable for 3 phase, 60 cycle,
480 volt electric current. They shall have Class F
insulation, suitable for temperatures up to 115°C, but the
motors shall have Class B temperature limits of 90°C rise by
resistance, at 115% rated load. The motors shall have normal
starting torque and low starting current, as specified for
NEMA Design B characteristics. They shall be TEFC design,
suitable for reduced voltage starting, WYE-DELTA type, with
six leads brought out for connection to the starter.
Leads shall be terminated in a cast connection box and shall
be clearly identified. The motors shall have 1.15 service
factor.
The motor-pump shaft shall be centered, in relation to the
motor base, within .005". The shaft run-out shall be limited
to .003".
The motor shaft shall equal or exceed the diameter specified
under sewage pumps, at all points from immediately below the
top bearing to the top of the impeller. To reduce overhung
loads, the dimension from the centerline of the lower bearing
to the top of the impeller hub shall not exceed 6". A
bearing cap shall be provided for the bottom motor bearing.
Bearing housings shall be provided with fittings for
lubrication as well as grease relief fittings.
The motor shall be fitted with heavy lifting eyes, capable of
supporting the entire weight of the pump and motor.
The motors shall be sized to be non-overloading over the full
range of pump operating conditions, and shall be 150 BHP
minimum.
G. CONTROL
The control equipment shall be mounted within a NEMA Type 1,
dead-front enclosure, fabricated of steel and reinforced as
required. The circuit, breaker, motor-starter section shall
be provided with removable covers, complete with suitable
latching devices. Contractor shall furnish reduced voltage
starters of the WYE-DELTA type. All circuit breakers,
motor-starter reset buttons and pump control switches shall
be mounted so that they are operable without opening the
high voltage cabinet. The blower timer shall be mounted on
the lower front hinged section. The 'pressure switches shall
be mounted on the side• of the cabinet. It shall not be
necessary to remove the front of the cabinet to make minor
adjustments to the blower times, 'etc., or the pressure
switches.
A grounding type convenience duplex outlet shall be provided
on the side of the cabinet 'for operation of 115 volt AC
devices. S
Thermal magnetic air circuit breakers shall be provided for
branch disconnect service and over-current protection of all
motor, control and auxiliary circuits. Magnetic reduced
voltage starters with under-voltage release and overload
coils for each phase shall be provided for each pump motor to
give positive protection. Each single-phase auxiliary motor
shall be equipped with an over-current protection device, in
addition to its branch circuit breaker, or shall be impedence
protected.
All switches shall be labeled and a coded wiring diagram
shall be provided. All wiring shall be color coded.
To control the operation of the pumps with variations of
sewage level in the wet well, an air bubbler system shall be
provided, complete with two air compressors, flow indicator,
bubbler line, 'and a sensitive pressure switch for each pump.
The two 'air compressors shall be of the close-coupled,
oil-less type. Each compressor shall have a minimum capacity
of 0.2 cubic feet of free air per minute at 10 PSI. It shall
incorporate a single phase, 60 cycle, 115 volt, drip-proof,
brushless type, electric motor. A motor driven timer shall
be provided to automatically alternate the compressors every
five minutes. Wiring and piping of the air compressors shall
be so arranged that one compressor may be removed without
removing the other compressor from service. If a stored air
bubbler system is used, two (2) compressors with tanks shall
be provided including an alternator to alternate the
compressors. Additionally, a purge system to divert the full
tank air pressure to the system shall be provided.
The pressure switches shall be of the mercury-tube type, with
sensitive pressure elements and independent high and low
adjustments for each pump capable of a minimum differential
of 12" water column.
An automatic alternator with manual "On-Off" switch shall be
provided to change the sequence of operation of the pumps on
the completion of each pumping cycle. Provisions shall also
be made for both pumps to operate in parallel should the
level in the wet well continue to rise above the starting
level for the lead pump. Running time meters shall be
provided for the pump motors.
H. PIPING
Pump suction and discharge lines shall be Schedule 40 steel
or Class 50 ductile iron pipe terminating within the limits
indicated on the drawings for the package pump system. A
bronze fitted plug valve shall be installed on the suction
line. The discharge line from each pump shall be fitted with
a bronze fitted check valve and a bronze fitted plug valve,
and expansion joint. The diameter of all pipe and valves
shall be as shown on drawings.
The check valves shall be of the spring-loaded lever type so
that the clapper can be lifted to back-flush the pump and
suction line. Four-inch, straight-through check valves 6"
and larger and increasing check valves, 6"x10" shall have
stainless steel shaft with non-lubricated packing glands.
The common discharge riser pipe and the discharge outlet
shall be Schedule 40 steel, plain-end pipe within the limits
shown on the drawings.
All. portions of the air bubbler line (both within the pump
room and within the wet well) shall be furnished by the pump
system manufacturer. This line shall be 1/2" nominal tubing,
terminating in a 1/2" NP.T fitting (in the pump room) to
accept the 1/2" flexible bubbler line extending to the wet
well. 0 0
A return loop to the bubbler line shall be provided to
protect the station from flooding. 1.
o
VALVES AND FITTINGS PROVIDED BY THE PUMP SYSTEM
MANUFACTURER
Plug valves shall be Dezurik or equal. Flex couplings shall
be Dresser or equal.
PRESSURE GUAGE
The pump. system manufacturer shall furnish a pressure gauge
that is tapped into the vertically rising portion of the - -
common discharge header. This gauge shall not be directly
mounted to the discharge piping. Instead, this gauge shall
be mounted to a fabricated steel stand that shall be bolted
to the concrete floor. The pump system manufacturer shall
provide all fittings, .hoses. and accessories required to
provide 'a complete installation. The steel stand shall be'
fabricated from 2" O.D. Schedule 40 steel pipe and 1/4-inch
thick steel plate. 'A 6"X6" steel plate shall be welded on as -
a base plate, and a 2"x4" (nominal) steel plate welded on as
mounting plate for the gauge. Anchorage to the concrete
floor shall be by. four 1/2" diameter stainless steel. anchor .
bolts. . Gauge stand location shall be as approved by the
Engineer.
Pressure gauge shall be plain case, bottom connection with
bronze bourdon tube and bronze or stainless steel movement.
Gauge accuracy shall be plus or minus 1 percent of full
scale. Range shall be 0-200 psi. Dial size shall be 4-1/2
inches. Gauge shall be liquid filled with gylcerine or
silicone.
A gauge protector shall be provided. Protector shall be
flanged diaphragm having a stainless steel diaphragm and
1/2-inch connection. Gauge and protector shall be supplied
as a unit, factory filled with glycerine.
WIRING
The pump skid shall be completely wired at the .factory,
except for the power feeder lines and field wiring to connect
the pumps and accessories to the remotely-mounted pump
control panel. All wiring in the pump station shall meet the
requirements of the National Electrical Code and shall be
coded as indicated on the wiring diagram. All wiring outside
the panel shall be in conduit, except for 115-volt accessory
items, which are provided . with . connecting insulated service
cord. The manufacturer shall provide conduit from the
control panel to receive the feeder lines. The conduit shall
terminate in a threaded conduit connection.
Accessory items such as the sump pump, dehumidifier and air
compressor shall be plugged into selectively polarized,
grounded convenience outlets, located close to their
installed position so that such items can be readily removed
and serviced if necessary.
L. FACTORY TESTS
All components of the pumping equipment shall be given an
operational test at the factory to check for excessive
vibration, for leaks in the piping or seals, and for correct
operation of the automatic control system and all auxiliary
equipment. The pump suction and discharge lines shall be
coupled to a reservoir and the pumps shall recirculate water
for at least one hour under simulated service conditions. The
automatic control shall be adjusted to start and stop the
pumps at approximately the levels required by the job
conditions.
Factory test instrumentation must include flow measuring with
indicator; compound suction gauge; bourdon tube type
discharge pressure gauge; electrical meters to measure
amperes, volts, kilowatts and power factor, speed indicator;
vibrator capable of measuring both amplitude and frequency.
The tests shall be in conformance with the test code of the
Hydraulic Institute Standards and the following requirements:
Test data sheets and curves of test results shall
be submitted to the Engineer for review. Test
information for each pump shall be compiled on data
forms as recommended in the test code of the
Hydraulic Institute Standards. Test data sheets
shall be certified and signed by a Registered
Professional Engineer.
Notice of the pump tests shall be given to the
Engineer no later than 20 days prior to the
scheduled test date. The Engineer shall have the
right to witness tests and inspect equipment prior
to shipment.
M. SPARE PARTS
A complete replacement pump shaft seal assembly shall be
furnished. The spare seal container shall include complete
installation instructions. A spare filter element for the
seal filter shall also be provided in the same container as
the pump shaft seal. Spare volute gaskets for the sewage
pumps shall also be furnished.
I
N. INSTALLATION AND OPERATION
Installation of the pumping equipment and related
appurtenances shall be done in accordance with written
instructions provided by the manufacturer.
The manufacturer shall provide the services of a factory
trained representative for a maximum period of one day to
perform initial startup of the pump station and to
instruct the Owner's operating personnel in the operation and
maintenance of the equipment.
0. GUARANTEE
The manufacturer shall have a minimum of five years'
experience in the design and manufacture of automatic
factory-built pump stations and shall guarantee for oneyear
from date of start up or eighteen months from date of
shipment, whichever is shorter, that. all equipment will be
free from defects in design, material and workmanship.
Warranties and guarantees by the suppliers of various
components in lieu of a single source responsibility by the
manufacturer will not be accepted. The manufacturer shall
assume prime responsibility for the guarantee of the pumping
system.
In the event a component fails to perform as specified or is
proven defective in service during the guarantee period, the
manufacturer shall provide a replacement part without cost to
the Owner. He shall further provide, without cost, such
labor as may be required to replace, repair or modify major
components such as the pumps, pump motors, sewage piping
manifold, etc. -
'The replacement or. repair (including costs of parts - and
labor) of those items normally consumed in service, such as
pump seals, oil, grease, etc., shall be considered as part of
routine maintenance and station upkeep. '
It is not intended that the manufacturer assume responsibil-
ity for contingent liabilities or consequential damages of
any nature resulting from defects in the Contractor's
workmanship.
The manufacturer shall further provide a complete and
detailed installation, operation and maintenance manual.
This manual shall cover, in addition to installation and
general operating procedures, the'operation, maintenance and
servicing procedures of the major individual components
provided with the pump station.
.. I
P. FIELD TESTS
Functional Test
Prior to performance testing, all, equipment shall be
inspected for proper alignment, quiet operation, and proper
connection by means of a functional test.
Vibration Test
,
The complete assembly, consisting of the driving unit and
pump, connected and in normal operation, , shall not develop
amplitudes of vibration exceeding limits recommended by the
current edition of Hydraulic Institute Standards..
Performance Test
The Contractor shall perform field tests on all completed
pump assemblies to demonstrate their conformance to the
Specifications to the satisfaction of the Engineer. A test
log shall be presented to the Engineer upon the completion of
each test that records the following:
Flow, as measured, by plant instrumentation and/or
storage volumes.
Pump suction and discharge pressures as measured by
calibrated gauges, converted to feet of the liquid
pumped and corrected-i to pump datum as defined by
Hydraulic Institute Standards, calculated velocity
heads at the suction and discharge flanges, and
total head, all tabulated in feet.
C. Driving motor voltage and amperage measured for
, each phase.
Units apparently failing to meet the Specifications to the
satisfaction of the Engineer shall be corrected as necessary
and retested. -
A satisfactory field performance test will be required prior
to final inspection and acceptance of the pump station work.
III. STANDBY ELECTRIC POWER SYSTEM
GENERAL
The emergency standby electric power system shall be a diesel
fuel powered, self-cooled radiator type system. Included
with the engine-generator set shall be dual mufflers, dual
exhaust pipes, starting batteries, battery charger, cables
and racks, 1,000-gallon fuel storage tank, 20-gallon fuel
transfer tank and lines, automatic transfer switch and all
accessories to make a complete. system. Unit shall be skid
mounted for indoor installation. Fuel tank will be mounted
remotely and shall be able to supply fuel to the engine for a
minimum period of 24 hours continuous operation.
The standby plant shall be rated 450kw 562.5 KVA at 0.8 power
factor, 277/480 volts, 3 phase, 4 wire, 60 Hertz, AC similar
to Kohler #450R0Z71, complete with all accessories as listed
in these specifications. Generator and engine shall be a
: matched set completely factory assembled.
GENERATOR
The generator shall be four pole, brushless, 10 lead
reconnectable of drip-proof construction with amortisseur
windings. Insulation shill be Class F with epoxy varnish.
Generator field current shall be controlled by a rotating
thyrister bridge module optically coupled to a firing circuit
type voltage regulator. The exciter shall be rotating
brushless type.
Radio-interference suppression meeting commercial standards
shall be supplied. Voltage regulation shall be within plus
or minus 2% of rated voltage, from no load to rated load.
CONTROLLER
The engine mounted controller shall be vibration isolated on
the generator frame. The controller shall contain the
following factory installed, wired and tested devices:
Complete standby 2 wire start-stop which shall
operate on activation of a remote control.
Overcranking protection designed to open the
cranking circuit if engine does not start after
30-90 seconds,complete with cranking reset button.
Five minute time delay to permit unloaded running
of the engine after transfer of load to normal.
Emergency shut-down switch for immediate stopping.
A.C. Voltmeter - 0-300 volts (phase voltage).
6. A.C. Ammeter - 0-800 amperes.
7. Frequency Meter - 55-65 CPS.
8. Overcurrent circuit breaker.
9. Indicating lights (individual) to show conditions
of:
High Water Temperature
Low Oil Pressure
C. Overspeed
Overcrank
Low Fuel
10. Circuit for remote alarm. (Remote alarm shall
indicate on telemetry unit.)
D. ENGINE
1. The prime mover shall be diesel fueled, 12 cylinder, 4
cycle liquid cooled and governed at a speed of 1800 RPM.
Fuel shall be #2 fuel oil.
2. Starting shall be by a 24 volt, positive engagement,
solenoid shift starting motor. Starting .system shall be
designed for restarting in the event of a false start,
by permitting the engine to come to a complete stop and
then re-engage the starter. Engine shall be equipped
with the following:
Two - 220 amperes •hour, 12 volt starting batteries
including rack and proper cables.
Lube oil filters.
C. Oil bath air cleaner.
Over-speed cut-out.
Radib suppression.
Low oil pressure cut-out.
High water temperature cut-out.
Gas proof, seamless, stainless steel, flexible
exhaust connections.
S Flexible fuel connections.
Oil drain extension.
3. The unit shall be factory installed on a fabricated
steel skid base complete with vibration isolators
between the unit and the base.
4. Unit shall be supplied with a 30 amperes battery
charging D.C. alternator.
5. The engine coiling system shall be radiator type with
pusher fan.
S
6. The entire assembly with the exception of the 1000
gallon fuel storage tank, shall be installed in the
generator room and shall be complete with the following
accessories:
Duct collar on radiator end for ducting of cooling
air.
Dual, 5" NPT exhaust outlet
Battery rack.
Dual residential mufflers
20-gallon day tank and pump as required for fuel
system.
Roof thimble for exhaust pipe exit.
Rain cap on exhaust outlet.
High temperature lagging on exhaust pipe and
mufflers.
1000-gallon fuel storage tank.
E. AUTOMATIC TRANSFER SWITCH
Furnish a 3 pole electrically operated, mechanically held
automatic transfer switch. Switch shall 'be rated at
800 amperes, 277/480 volts, 4 pole, 4 wire. Switch shall be
furnished complete with the following:
Test switch to start plant and transfer load.
Time delay on momentary outage (3 seconds).
Time delay on transfer to normal (5 minutes).
Differential voltage relay (70% pickup, 90% drop
out).
Manual return to normal pushbutton..
Engine starting contacts.
Pilot light on switch cover to indicate when switch
is in emergency position.
In the event of failure of the automatic transfer mechanism,
means for manual operation shall be .provided. The transfer
switch shall include a test switch to simulate normal source
power failure and an automatic battery charger with an output
voltage matching the engine starting system.
The transfer switch, shall include an in-phase monitoring
accessory to prevent excessive in-rush currents from
transferring motor loads.
TIe'."-&an fef switch'—shai'lhava---two--5A ,-2 5 0V—.rted_dry
auxiliaiy contacts, closed when theswitch iin normal power
position .When thetransfer switch opeates, the contacts
'shall open and arrr.€he pump lockoutcircuit o that on1yohe-
pump can operat'e.n standby power. '
ABOVE-GROUND FUEL OIL STORAGE TANK
Tank shall be 1,000 gallon capacity, horizontal configura-
tion, constructed of steel, double-wall construction, UL-
listed for aboveground service, and shall conform to UL-142.
Tank shall have 18-inch minimum manhole with provisions for
emergency venting, and 3-inch threaded openings for inlet,
return, fill, and vent and 1-inch opening for level gauge and
drain. Thetank shall be furnished clean and dry inside with
red iron oxide primer coating. Plug all openings prior to
shipment.
Anti-siphon valve shall be suitable for diesel and shall have
maximum capacity of 50. gph. Valve shall be 1-1/2 inch,
brdnze construction, Preferred Utilities Corporation, or
equal.
Foot valve shall be brass double poppet with metal-to-metal
seat, 20-mesh inlet screen, 1-1/2-inch NPT, McDonald Model
913, or equal.
Fill cap shall be 3-inch NP'T with cast-iron body, brass lid,
Buna-N washer, complete with locking hasp, Emco Wheaton No.
A-0752, or equal.
Vent shall be iron body, bronze fitted, 3-inch, McDonald
Model 925TU, or equal.
Ball float valve shall be Emco Wheaton Model A75-001, or
equal.
Level gauge shall be a remote reading hydrostatic type with
hand pump purge. Gauge shall be furnished with a scale range
corresponding to tank size and shall be wall mounted and
located as shown on the Drawings. Provide gauge with dial
calibrated in gallons with a 0 to 1,000 gallon range, 1/4
inch O.D. copper tubing, and air chamber. •Level gauge shall
be Pneumeractor Model P-S.
Contractor shall provide all piping, fittings and
appurtenances as indicated on the drawings, specified herein,
or are otherwise necessary for a complete fuel supply system.
SYSTEM RESPONSIBILITY
All parts of this system shall be by one manufacturer so
there will be one source of supply and responsibility. System
shall include maintenance manual and parts list. System
shall be warranted for a period of one hear from date of
installation. *Manufacturer shall be Onan, Kohler or equal.
FACTORY TESTING, INSTRUCTIONS, WARRANTY
The automatic transfer switch and engine-generator set shall
be tested by the manufacturer prior to shipment. Before
installation, a certified copy of the factory full-load test
on the generator set supplied shall be submitted to the
engineer for approval.
FIELD TESTING
Following complete installation of the engine generator set,
transfer switch and associated work at the site, the system
shall be started up and tested by a factory trained
manufacturer's representative to the complete satisfaction of
the Owner and Engineer, including a •test at actual system
full load, if possible. S
IV. SURGE CONTROL EQUIPMENT
GENERAL
A. Description
This section includes materials, testing, and installa-
tion of a vertical hydropneumatic tank for surge
control, including a. pressure vessel, level gages,
accessory gages and piping.
B. • Submittals - • • •• •
1. Submit layout drawings showing dimensions of
equipment and accessories. Show equipment weights
and anchor bolt designs. Show weight of pressure
vessel, both empty and filled with water. Provide
dimensional drawings and layouts for sight gages
and try valves.
Submit mathematical computer analysis of hydraulic
conditions which determine the design.
Submit structural calculations for design of tank
and its supports including seismic loading.
Submit ASME Forms • U-lA for the pressure vessel
certifying that pressure vessel meets the ASME
Boiler and Pressure Vessel Code requirements.
C. Manufacturer's Services
Provide equipment manufacturer's services at the jobsite
for the minimum man-days listed below, travel time
excluded:
One man-day for installation assistance and in-
spection of the surge control system.
One man-day for field testing and adjustment of the
surge control system operations.
One man-day to instruct the Owner's personnel in
the operation and maintenance of the surge control
system. •
D. Manufacturers
The surge 'control system shall be manufactured by Fluid
Kinetics Corporation, American Air Filter, or equal.
. . E. Performance Guarantee
Provide a written guarantee of performance, materials,
and workmanship guaranteeing that the surge control
system will conform to the design criteria specified.
Such performance shall be verified by the field testing
specified. In the event that the test results show that
the surge control equipment fails to comply with the
design' criteria, upgrade or reconstruct the surge
control system so that it meets the design criteria.
MATERIALS
A. Hydraulic Design Criteria
The system for which the' surge control device is to be -
provided consists of a pumping station with a discharge
pipeline. Assume the following values or factors in
performing the surge analysis and designing the tank:
"Old" System "New" System
Hazen-Williams
friction factor: C = 110 C = 150
Flow rate through
pumping station: 620gpm • 1030 gpm
Number pumps "ON" 1 • 2
Maximum allowable
pressure due to
surge, in tank or ,
pipeline: 314 ft. • 320 ft.
Minimum 'allowable
pressure due to
surge, at any point
in pipeline: no column no column
separation ' separation
Assume no inertia assistance from pumps.
A 4-inch I.D. steel pipe will connnect the pressure
vessel to the 8-inch O.D. discharge pipe. Connector
piping will be approximately 11 feet long and include a
right angle bend as shown on the construction drawings.
A check valve will be installed on the discharge piping
from each pumping unit.
The discharge pipeline ground profile is shown on the
construction drawings. 'The pipe materials, lengths and
working pressure classes are shown on the profile.
O
The design analysis should include consideration of a
power failure when the pumping station is producing the
"worst case" design flow condition.
Size tank with allowances for:
Ten percent volume seal at lowest surge pressure
anticipated at tank after power failure with "worst
case" design flow rate.
Water level control band of 3 inches.
The minimum net tank volume shall be 500 gallons.
B. Structural Design Criteria
Design the tank, supports, and tiedown lugs for the
following loadings:
Seismic loading = 0.15g horizontal and 0.12g
vertical with full tank; seismic loads shall be
combined with dead load using 1/3 stress increase
in structural material.
C. Pressure Vessel
Materials for the tank, design, and shop fabrica-
tion and inspection shall comply with Section VIII
of the ASME Boiler and Pressure Vessel Code for
Unfired Pressure Vessels, with only the plate
steels in Table UCS-23 of said code being used.
Design pressure shall be at least 10% above the
maximum surge pressure and shall be a minimum of
175 psig. Provide tank with support structures,
bearing plate, and neoprene pads prepared to be
bolted to concrete floor slab.
Provide ASME code stamp and pressure rating on
pressure vessel.
4. Provide 12-inch by 16-inch elliptical access
manhole, flanged outlet for pipe connection to
manifold header, threaded couplings for connecting
gages and valves. Couplings shall be 3,000-pound,
WOG forged steel, per ASTM A105, Grade 70. Threads
shall comply with ANSI B2.1. Joint lubricant shall
be Teflon joint compound or Teflon tape.
D. LiQuid-Level Gaqes
Provide tubular-glass liquid-level gages, having 3/4-
'inch tube 0. D. Minimum viewing length shall be 24
inches per gage. Provide sufficient gages to view the
entire operating range of water levels in the tank.
Connections shall be threaded, 3/4-inch, per ANSI B2.1.
Provide isolation valves with ball checks to prevent
loss of liquid upon gage breakage. Valves shall be
offset pattern with integral bonnet. Valve bodies shall
be bronze (ASTM B61 or B62). Provide drain cock on the
lower valve. Valves shall comply with ASME Boiler and
Pressure Vessel Code. Valves and gages shall have a
minimum pressure 'rating of 175 psi WOG. Gages and
valves shall be Penberthy Hodaille Model K3B, Ernst Gage
Company Model EEP36A, or equal.
E. Safety-Relief Valve
Safety-relief valve shall comply with the ASME Boiler
and Pressure Vessel Code. Valve shall have a pressure
rating of at least 350 psi WOG. Valve shall have bottom
inlet and side outlet. Inlet shall have MPT threads,
ANSI B2.1. Valve shall incorporate a calibrated spring
set to allow the valve to' open at a pressure of 300
psig. Valve shall be Consolidated Figure 1541-3,
Lunkenheimer Figure 1705 or equal. ,.
EXECUTION
Welding
Welding shall comply with the ASME Boiler and Pressure
Vessel Code, Section VIII..
Painting and Coating
L. , Coat the interior of the pressure vessel per
Painting Section. Line the probe well the same as
the pressure vessel. Apply coating at shop.
2. Coat the exterior of the pressure vessel per
Painting Section. Apply prime coat at shop. Apply
finish coat in field.
Field Testing
Test the surge control system by operating pumps and
shutting off the main power disconnect switch for the
pumping station to simulate pump power failure. Start
with power failure with one pump running. Then operate
with power failure for two pumps running. Continue
testing until the surge control system has been
demonstrated to control surge with power failure and all
pumps running. Attach pressure detectors with a strip
chart recorder to record the pressures in the system
upon commencement of power failure. Locate the
recorders to cover the critical high pressure and low
pressure surges.
V. ULTRASONIC FLOWMETER
A. GENERAL
The Contractor shall furnish and install the 8-inch diameter
ultrasonic flowmeter, complete in accordance with these
specifications and as shown on the drawings. The flowmeter
shall be of the two-path chordal acoustic type which measures
the flow by transmitting acoustic pulses between transducers
mounted on the pipe. A 120-volt, single-phase, 60-hertz
power supply will be provided for the flowmeter to power .the
transmitter, flow recorder, and readout instruments.
Equipment to be furnished shall include the following:
One ultrasonic flowmeter (two pairs of transducers -
and transmitter) installed in flowmeter vault. -,
One single-pen, 7-day circular chart recorder and
one digital totalizer installed in emergency
generator room.
C. One-digital indicator installed in the pump room to
provide individual readout of flow.
Transducer cable and conduit.
Accessories required for complete flow measuring
installation.
The ultrasonic flowmeter shall be Nusonic Model 9000 or
approved equal.
B. OPERATING CONDITIONS
The flowmeter shall accurately measure the 'flow over the flow
range of 0-1500 gallons per minute. The flowmeter shall
measure the flow within plus or minus 1.0 percent of actual
flow for all flow-with velocities above 1 foot per second and
up to the maximum .f low given above.
The water to be measured will be domestic sewage with
estimated average solids content of less than 1.0 per cent.
The maximum waterhead in the meter pipe at the transducer
housing will be approximately 320 feet.
The transmitter to be installed in the flowmeter vault shall
be suitable for operation in the ambient temperature of 0 to
66 degrees C and shall be equipped with automatically
operated heater and thermostat.
C. MATERIALS
All of the equipment described below regardless of
manufacturers required to complete a system shall be
furnished by one supplier. Component devices which perform
similar functions in each system shall be purchased from the
same manufacturer. Flowmeter cable shall be installed as
specified in the Electrical Section.
Transducer Assemblies: Each transducer assembly
shall be watertight and shall consist of a wetted transducer
with holder to allow for transducer replacement while the pipe
is under pressure. Transducer holders which will be in
contact with water shall be made of stainless steel.
Electronic Converter -Transmitter: The electronic
transmitter shall be capable of accurately converting
transducer pulse signal input to 4 to 20 milliamperes.
The converter shall be installed in a NEMA type 4X sealed
enclosure suitable for installation in the space -allotted-in
the flowmeter vault as shown on the drawings. The enclosure
shall be equipped with a hinged door and/or glass window
through which the displays can be read. Each converter shall
provide the following displays, output signals, and contact
outputs:
Flow Indicator: The flow indicator shall be
of a four-digit display to indicate the flow in gallons per
minute. The least significant digit shall be in single units
of gallons per minute. Leading zeros of the readout shall be
suppressed.
Flow Totalizer: The flow totalizer shall be
an eight-digit (minimum) display to totalize the quantity of
water directly in million gallons. Totalizers shall display
totalized flow with the least significant digit in hundreds
of million gallons. Leading zeros of the readout shall be
suppressed. The totalizer shall retain the totalized readout
upon loss of power. -
C. Analog Output: A 4 to 20 milliampere flow
output shall be -provided for driving the 7-day circular chart
recorder. The converter shall be capable of driving an
800-ohm load.
d. Flow Recorder: One electronic 7-day circular
chart flow recorder shall be provided and shall be panel
mounted with the flow totalizer in - the emergency generator
room. The recorder shall be mounted in an indoor-type metal
wall-mounted case which shall be moisture and dust resistant.
. .0
The case shall be provided with a hinged door with glass
window through which the chart can be read. The recorder
shall be driven by a self-starting, 120-volt, single-phase,
60-hertz, synchronous-motor, electric-clock-type drive. The
recorder shall be suitable for operating on a 4-20
milliampere flow input signal received from the flowmeter.
The recorder shall be of the direct-reading type, uniformly
graduated in gallons per minute to cover the total capacity
of 1,500 gallons per minute. The paper on which the charts
are printed shall be of good quality, nonblotting, with a low
coefficient of shrinkage. Ink shall be free flowing and of a
permanent color. The recorder shall use sealed-type,
disposable, ink pen cartridges. The recorder pen shall be
readily adjustable and the chart or chart holder shall be
adjustable to match the time at which the chart is placed in
service without disturbing the instrument gearing.
(.) Spare Parts: The Contractor shall furnish a
recommend list of spare parts for all equipment furnished
under these specifications with per-item costs for each unit.
The list shall include recommended spare parts for transducer
modules and assemblies, input and output hardware, logic
hardware power supplies, display hardware, and all associated
electronic subassemblies. No spare parts hardware are to be
furnished under these specifications.
(4) Paint and Coatings:
specified in Paint Section.
INSTALLATION
Paint and coatings shall be as
The Contractor shall install the flowmeter. in a approved
manner so that operation is satisfactory and the accuracy
requirements of these specifications are obtained. The
equipment shall be installed in accordance with the
instructions of the supervisory engineer in charge
representing the manufacturer of the equipment furnished.
The electronic converters and instruments shall be installed
in specified locations. All expansion anchors for installing
the equipment shall be furnished and installed by the
Contractor.
TESTS
The flowmeters shall be tested for satisfactory operation in
accordance with the requirements of these specifications and
testing codes. The Contractor shall furnish all test
equipment and additional hardware -necessary for the complete
performance of the tests.
a
A 72-hour "continuous burn-in" test without malfunction shall
be performed on the flowmeter. This test may be performed at
the factory or in the field. Successful completion of the
"continuous burn-in" tests shall demonstrate to the Engineer
that the flowmeter operates properly at the specified
operating temperatures.
An operational field test shall be performed on the flowmeter
and readout displays after installation. The Contractor
shall provide the water (if required) for testing.
Successful completion of these tests shall demonstrate to the
Engineer that the flowmeter will operate properly under field
conditions and meet specified operating requirements.
SERVICES OF INSTALLATION ENGINEER
The Contractor shall retain a factory-trained engineer to
supervise the installation of the ultrasonic flowmeters, to
make final adjustments, and place the equipment into
operation.
MAINTENANCE AGREEMENT
For a period of 2 years after the first day that the pump
station is placed in service, or 3 years after acceptance of
the equipment by the Owner, whichever comes first, the
Contractor shall be responsible for, without cost to the
Owner, the repair of all defects or failures occurring in the
ultrasonic flowmeter from any cause whatsoever except for
such defects or failures which are due to negligence in the
operation of the equipment by the Owner or its agents, acts
of third parties, acts of God, or acts of the common enemy.
The Contractor will be reimbursed for the actual and
necessary cost, plus 15 percent for profit and general
expense of any work or materials pertaining to repairs or
replacements that are determined as not the responsibility of
the Contractor.
The Contractor, upon notice from the Owner, shall promptly
commence and diligently 'prosecute the repair of any defects
or, failures that develop during the maintenance agreement
period without regard to the cause of the defects or
failures. The work or repairing any defects or failures
includes the necessary disassembly, repair, replacement, and
reassembly of the equipment and any appurtenances destroyed
or disturbed by reason of such work. The *Contractor shall
make necessary arrangements to have competent personnel and
suitable equipment available so that repairs or replacement
may be commenced within 48 hours after receipt of notice from
the Owner.
If the Contractor fails or refuses to make required repairs
or replacements with due promptness and diligence as
determined by the Owner, the City shall have the right to
make repairs and replacements and, unless it is determined
that the costs of such work is chargeable to the Owner, the
entire costs thereof shall be paid by the Contractor and may
be collected from the Contractor or the Contractor's surety
or sureties, or both.
VI. HAZARDOUS GAS DETECTION SYSTEM
A. CONTROL MODULES:
Control modules shall include a ready LED (green), and alarm
LED (red), and warning LED (amber). Modules shall also
include a digital display as well as adjustments for zero and
gas span on the front panel. A switch will display alarm set
points on the digital display. A second switch will lockout -
alarms during calibration. Output relay contacts shall be
rated at 5 AMP @ 115 VAC. (Resistive) DPDT (Form C). One
set of customer contacts for trouble; warning (low alarm) and
alarm (high alarm) are common for all channels.
B. HYDROGEN SULFIDE GAS DETECTION SYSTEM
Two Hydrogen Sulfide Gas Sensors, calibrated for 50
ppm full scale of hydrogen sulfide in air, shall be
located within the pump room as shown on the
drawings. The Hydrogen Sulfide Gas Detection
System shall consist of sensors, control modules
and power supplies. Power to the system shall. be 120 VAC and 12 VDC.
Sensor Assemblies:
Sensors and housings shall, be suitable for area
classification Class I, Group D, Division I as
specified by the National Electric Code. Sensors
shall be capable of operation up to 5,000 feet from
the control modules. Sensor shall be electrochemi-
cal type with a one year warranty.
C. OXYGEN GAS DETECTION SYSTEM
General:
Two Oxygen Gas Sensors, calibrated for 0-25% oxygen
deficiency, shall be located within the.pump room
as shown on the drawings. The Oxygen Gas Detection
System shall consist of sensors, controls modules
and power supplies. Power to the system shall be
120 VAC and 12 VDC.
Sensor Assemblies:
Sensors and housings shall be suitable for area
classification Class I, Groups D, Division I as
specified by the National Electrical Code. Sensors
shall be capable of operation up to 1,000 feet from
the control modules. Sensors shall be .electro-
chemical type with one year warranty.
O
D. COMBUSTIBLE GAS DETECTION SYSTEM
General:
Two Combustible Gas Sensors, calibrated for 100%
LEL full scale of methane in air, shall be located
within the pump room as shown on the drawings. The
Combustible Gas Detection System shall consist of
sensors, control modules and power supplies. Power
to the system shall be 120 VAC and 12 VDC.
Sensor Assemblies:
Sensors and housings shall be suitable for area
classification Class I, Group D, Division I as
specified by the National Electric Code. Sensors
shall be capable of operation up to 5,000 feet from
the control modules. Sensors shall be resistant to
silicone vapors and hydrogen sulfide. When exposed
to 1 ppm HMDS (hexamethyldisiloxane) for 200 hours,
loss of sensitivity shall not exceed 10%. When
exposed to 100 ppm HS (hydrogen sulfide) for 24
hours, loss of sensitivity shall not exceed 1%.
The sensor shall be constructed of stainless steel
and Hastelloy C*. Zero and Span adjustments shall
be in control module.
E. EQUIPMENT LIST
All components shall be the product of a single
manufacturer. Equipment shall be as manufactured by MSA
Instrument Division (contact: Incom West, 581-2200:
local MSA representative), of the types specified below:
1 each M516 16 channel housing #467445.
6 each M516 control module #466652
2 each combustible sensor #475200
2 each H2S sensor #474644
2 each 02 sensor #474675
1 each calibration kit #476610
1 each H2S calibration kit #459949
1 each bottle pentane #466193
1 each bottle 99.9% nitrogen #481317
1 each bottle H2S #467897(40ppm)
Alternate manufacturer shall be subject to Engineer's
prior approval.
F. WARNING ALARMS
A single red warning light shall be mounted adjacent to the
pump room stairway access hatch. This light shall be
activated whenever a "trouble" condition exists. This light
shall remain "ON" until the condition ceases.
C
The light shall be mounted to a 1/4" thick steel plate that
is welded to the nearest support leg of the surge control
tank. This light shall be a minimum 24" above grade. Light
shall be suitable for outdoor installation and shall be in a
vandal resistant housing. A test switch and circuit shall be
provided to test for a burned-out light bulb.
C. INSTALLATION
Contractor shall furnish and install all electrical conduit,
wiring, mounting brackets, NEMA enclosures, alarms and/or
warning lights and other accessories as required to provide a
complete installation of the control panel and all sensors.
VII. VALVES AND MISCELLANEOUS EQUIPMENT
A. GENERAL
Description
This section covers the work necessary for furnishing and
installing valves and miscellaneous equipment, complete.
Submittals During Construction
Submittals during construction shall be made on all valves
and miscellaneous equipment in accordance with Section
GENERAL REQUIREMENTS.
B. MATERIALS
Pump Room Sump Pump
Sump pump shall be non-clogging, with 5-inch diameter
bronze impeller threaded to a stainless steel shaft.
Pump shall be capable of handling 5/8-inch spherical
solids without clogging.
Pump motor shall be an oil-filled ball-bearing motor
that is completely submersible. Motor shall be 1/3-HP,
single phase, 115V, 1750 rpm with built-in automatic
reset overload protection.
Pump operation shall be •controlled by a diphragm type
pressure switch that is sealed in a watertight housing.
Switch setting to operate pump shall be six inches of
water level above the diaphragm.
Pump shall be Hydrornatic OSP33A1-AB, or equal.
Pump Room Flooding Alarm Probe
The pump room floodings alarm probe shall use the
capacitance bridge principle to detect water level.
Probe shall be Teflon insulated with a tight fit between
the probe rod and the insulation. Unit specifications
shall be:
Power supply 115VAC
Reproducibility 0.1 pf or better
• Deadband 0.2 pf or better
Enclosure NEMA 7
Contact rating • SPDT, 5 amp •
115VAC non-inductive
Operating temperature 20°F to 140°F
The probe, shall be installed inside a 2" O.D. steel
perforated shield, the probe end being six inches above
pump room floor as shown on the drawings.
Probe shall be a Capacigage Model CG-810B as manufact-
ured by Crane Pro-Tech Environmental Instruments (con-
tact D.A. Matthews/Associates; (714/994-4321).
3. Pump Room Blower
a. General:
The centrifugal fan for the pump room shall be the
direct-drive, single-width, single-inlet type
furnished complete with fan housing, fan, motor,
support frames, discharge screen, and all
accessories required for installation and.
operation.
The centrifugal fan shall provide 1,660 cubic-feet-
per-minute airflow at a static pressure of. 2-3/4-
inch water gage, a maximum speed of 1,750 revolu-
tions perminute, and a maximum outlet velocity of
2,610 feet per minute.
The centrifugal fan shall be furnished with the
manufacturer's standard finish.
The centrifugal fan shall be Model D11H by Peerless
Electric-H.K. Porter Co., or equal.
LM Materials:
Fan: The fan wheel shall have fabricated steel
blades and the housing shall be fabricated steel.
The fan shall have a mounting frame suitable to
support the housing and motor, and adjustable for
various fan discharge positions.
Motor: The fan motor shall be the across-the-line,
full-voltage-starting, constant-speed-induction
type. The motor shall be rated 220/440 volts,
three phase, 60 hertz, totally enclosed and
explosion proof.
The motor shall be provided with internal thermal
protection and shall conform to the applicable
standards of IEEE, NEMA, and ANSI. The nameplate
horsepower rating shall be minimum of 115 percent
of the brake horsepower required at the specified
performance.
Manual Motor-starting Switch: The manual
motor-starting switch shall be a single-pole,
single-throw switch capable of energizing and
de-energizing the fan motor and shall provide
thermal overload protection up to 120 percent of
rated load. The manual switch shall be by Allen-
Bradley, Milwaukee, Wisconsin; or equal.
Flexible Connector: The flexible connector shall
be made of neoprene-coated glass fabric. The
flexible connector shall be not over 6-inches long
and shall be complete with devices suitable for
attaching to equipment ductwork. The flexible
connector shall be installed with sufficient slack
to prevent the transmission of vibrations.
Connecting equipment and ductwork shall, be
self-supporting and shall not impart any twisting
forces to the flexible connector. -
Sheet Metalwork: Exposed duct and duct transitions-
between the pipe assemblies and the flexible
connector shall be constructed from minimum No.
18-gage galvanized steel sheets in accordance with
ASTM designation: A 526.
Miscellaneous Materials: For materials shown on
the drawings but not covered herein by detailed
specifications, the Contractor shall furnish
standard commercial grades of materials that are
satisfactory to the Engineer.
C. Installation:
The Contractor shall install the ventilating
systems where shown on the drawings. The miscel-
laneous metalwork shall be fabricated and installed
in accordance with HVAC DUCT CONSTRUCTION STANDARDS
(First Edition 1985),'a publication of SMACNA. The
centrifugal fan shall be aligned and fastened
securely to the support platform as shown. A
flexible connector shall be installed between the
fan and the inlet air duct.
4. Precast Concrete Vault for Sonic Flow Meter
The precast concrete vault shall be 61 x61 x6' (nominal
inside demeñsions) and shall have a 4'x4'. double-leaf
torsion hinged cover. Both the vault and the cover
shall be designed for HS-20 traffic load. The cover
shall be lockable by a recessed padlock or other means
approved by Engineer.
Vault shall be Quickset Model 6060-BT Series with
dimensions suitable for the indicated installation, as
manufactured by Associated Concrete Products, Inc., or
approved equal.
Shut-off Valve for Holding Tank Drain Line
Shut-off valve shall be an iron body, bronze trimmed
12" inch, Class 125 gate valve with flanged ends. Valve
shall be of the outside screw, rising stem, bolted
flanged Yoke-bonnet type, with solid wedge, bronze stem
and handwheel.
Valve shall be Figure 1793 as manufactured by Wm. Powell
Company, or equal.
Manhole Access Through Roof Slabs
Manhole access shall be provided by 24" diameter manhole
frames with locking covers that- conform to City of San
Diego Standard Drawings M-1 and M-4. Manhole assembly
shall be suitable for HS-20 traffic loads.
Manhole frames and covers shall be set so the top of the.
covers are flush with the surface of the adjacent
concrete surfaces, unless otherwise shown or approved.
Manhole Steps
Manhole steps shall be constructed of a copolymer
polypropylene plastic encapsulating a continuous steel
rod. The steps shall meet the requirements of ASTM
C478, paragraph 11 and ASTM 2146-68 under Type II, Grade
16906. The steel rod shall be a 1/2 inch diameter
deformed reinforcing rod meeting the requirements of
ASMT A-615, Grade 60. .
Manhole steps shall be Model PS-2-PFS as manufactured by
M.A. Industries, In., or approved equal.
Roof Scuttles
Roof scuttles shall have galvanized steel covers, and
shall be of double-leaf design. Hardware shall be
stainless steel. Cover shall have compression spring
operators, two point locking mechanism and a padlock
hasp.
Roof scuttle dimensions shall be:
o 4' (width) x 12' (length) for access to the
pump room stairway.
o 5' (width) x 10.' (length) for direct access
over the skid-mounted pumping system.
Roof scuttles shall be Bilco Model "D", or equal.
9. Anchorage Systems to Concrete
Expansion Anchors
All anchor bolts and associated nuts and washers
subject to sewage immersion or sewage atmosphere
(such as in the Pump Room) shall be of stainless
steel construction. All other anchor bolts
(including nuts and washers)• shall be of carbon
steel construction and zinc-placed in accordance
with ASTM B633, Section 2, Type III.
Contractor shall provide all anchor bolts as shown
or are otherwise required for, a complete
installation of all equipment. Minimum anchor
bolt size shall be 3/8" diameter X 2": long,
unless. otherwise specified.
Anchor bolts shall be Kwik' Bolt or Stainless Steel
Quick Bolt as manufacturered by Hilti Fastening
Systems, or approved equal.
Adhesive Anchors
Adhesive anchors shall be used for anchoring metal
components . within the wet well or holding tank.
Adhesive anchors shall be Parabond capsule anchors
with 316 stainless steel stud, nuts, and washers,
as manufacturered by Molly Division, 504 Mt. Laurel
Avenue, Temple, PA 19560; heavy duty adhesive
anchor with HBP adhesive cartridge and 316
stainless steel anchor rod assembly as manufactured
by Hilti, Inc., P.O. Box 45400, Tulsa, OK 74145, or
equal. .
10. Gate valves 3-inch and Smaller
Valves shall be Class 200 with a cold water working
pressure of 400 psig. Valves shall be bronze, nonrising
stem, union bonnet, solid disc, and threaded ends.
Valves shall be Powell Figure 380, or equal.
11. Check Valves 3-inch and Smaller
Valves shall be Class 200 with a cold water working
pressure of 400 psig. Valves shall be bronze,
Y-pattern, with threaded ends. Valves shall be Powell
Figure 560 Y, Crane No. 36, or equal.
9
Globe Valves 3-inch and Smaller
Valves shall be Class 200 with a cold water working
pressure of 400 psig. Valves shall be bronze, union
bonnet, plug type disc, and threaded ends. Valves shall
be Powell, Figure 102, or equal.
Lubricated Plug Valves
Lubricated plug valves shall be used wherever plug
valves are specified or indicated for buried service.
Valves shall be rated 200 WOG (400 psi test), wrench
operated, flanged (ANSI Class 125) and shall be of the
indicated sizes. '
Valves shall be Resun (713/351-2222) Figure DV-151 or
approved equal. ,
Contractor shall furnish lubricating fitting extension
and operating stem extension to within six inches of
ground' surface. Operating stem extensions shall conform
to City of San Diego Standard Drawing SDW-109.
Valve Box and Cover
The Contractor shall provide a valve box and cover for
all buried valves, conforming to City of San Diego
Standard Drawing SDW-107.
Guard Posts
Guard posts shall be provided as indicated on the
drawings, and 'shall conform to City of San Diego
Standard Drawing W-16
Rubber Check Valve
Rubber check valve with slip-on end connection shall be
Series TF-2 Tideflex Check Valve as manufactured by Red
Valve Company, Inc. (412/279-0044).
Precast Trench Drains
The trench drain installed in the pump room shall
consist of precast polymer concrete channel drains
presloped to provide a minimum slope of 0.65% in the
channel bottom. All channel sections shall have
galvanized steel gratings and locking devices.
Trench drains shall be Part Nos. 601, 602 and 603 as
manufactured by Quazite Corporation (707/422-0944).
H
.C. WORKMANSHIP
General:
Install all materials covered by this section in
accordance with the manufacturers' recommendations and
as specified herein.
Valves
Before installation, carefully clean valves of all
foreign material, adjust stuffing boxes, and inspect
valves in open and closed positions. Unless otherwise
indicated, install valves with the stem vertical. Mount
horizontal valves in such a manner that adequate
clearance is provided for operation. Installation
practices shall conform to manufacturer's
recommendations.
Testing
Valves will be tested at the same time that the adjacent
pipeline is tested. Joints shall show no visible
leakage under test. Repair joints that shown signs of
leakage prior to final acceptance. If there are any
special parts of leakage prior to final acceptance.
VIII. GENERATOR BUILDING
A. METAL DOOR AND FRAME
1. GENERAL
Furnish and install hollow metal frame and door as shown on
the Drawings and as specified herein.
MATERIALS
Frame shall be 16. gauge prime-painted steel with mitered
corners reinforced for hardware per SDI Standard 107, latest
edition. . All corners welded at masonry frames, delivered to
job with spreader attached. . .
Door shall be 18 gauge steel, and shall meet the requirement
of SDI Type II, Style 1. Fill door with plastic foam panel
reinforcement.
Approved manufacturer - Doors and frames shall be supplied as
manufactured by Amweld, Steelcraft, Republic Steel, or equal.
EXECUTION
1. Frames - Shall be furnished in one of both of the
methods specified: Knocked down with mitered
corners having heavy reinforcements and four
integral tabs for secure interlocking of jambs to
head at each corner. Provide spreader bar where
required to insure alignment. Set up, with mitered
corners welded and ground smooth full length of
joints and spreader bar attached. .
Anchors to be provided per details, or not less
than 3 anchors on each jamb to suit wall condition,
and floor angle clips for sill anchorage.
Frames to be mortised, drilled,, tapped and
reinforced at the factory for installation of
finish hardware, in accordance with templates
supplied by the Contractor for finish hardware.
Gauges of reinforcement shall be as follows:
Hinge 3/16-inch steel
Closer 12 gauge
Lock 16 gauge
Strike 16 gauge
Jambs shall be constructed to set on finished
floor.
Provide rubber silencers on all door frames; two
per door minimum.
Weatherstripping shall be flexible weatherseal
interlocked into head and jamb by tab and slot
connection as manufactured by Reeve or, shop
applied weatherstripping Type 306 as manufactured
by "Pemco," or equal, installed by the door and
frame manufacturer.
3. Doors - Seamless, full flush, of pan type
construction, unbroken face with all edges sealed
and ground smooth, and internal construction per
manufacturer's specifications.
Door shall be cut, reinforced, drilled and tapped
for specified hardware.
Provide Underwriter's Labels as appropriate.
4. Finish Hardware - Each door shall be provided with:
Cylinder Lock - "Russian," "Sargent,"
"Schlage" or equal. Locks shall be keyed to
the City of Carlsbad's master key; coordinate
with Larry Willey at Utilites Department
(619/438-5604)
1-1/2 pair butts each door.
Surface Closers - Norton Type No. BA, Sargent
40V Series or equal.
5. Door finish shall be a light biege color to match
the Generator Building's adobe colored slump block
and shall have one coat of primer and two addition-
al coats of finish.
B. LOUVERS
Louvers shall be 4-inch wide extruded aluminum standard
mullion louvers. Frame and blades to be 6063-T52 Alloy,
0.125 inch thick. Heads, sills and jambs to be one piece
structural members and shall have integral caulking slot and
retaining bead. Slidable interlocked mullions to have
provisions for expansion and contraction. All fastenings to.
be stainless steel. Structural supports to be designed by
the louver manufacturer to carry a wind load of not less than
20 psf. The engine fan louver shall be designed to withstand
the force of the engine fan.
Louvers shall be furnished with 3/4-inch mesh, 0.063"
diameter wire intercrimp bird screen secured within an
extruded aluminum frame. Louver with attached bird screen
shall be in accordance with the generator engine
manufacturer's requirements. In no case shall the
unrestricted free air opening be less than 18 square feet.
Maximum air restriction across the radiator shall be 0.5
inches water. Louver shall be Model 4157 as supplied by ACS.
Plus, San Marcos, California or approved equal.
Louver finish shall consist of two coats minimum and shall be
finished in a light biege color to match the doors and
Generator Building's adobe-colored slump blocks. The two
coat system shall consist of baked-on primer and fluorocarbon
polymeric finish coat and shall be construction specialities
Kynar 500 finish or approved equal.
0
IX. PROTECTIVE COATINGS
SCOPE
This section covers surface preparation, furnishing, and
application of architectural paint and special protective
coatings, complete.
It is the intent that all buried exterior concrete, submerged
concrete, exposed metal, and submerged metal surfaces, be
painted, whether specifically mentioned or not, except as
modified herein. Exposed exterior concrete surfaces will not
be painted unless specifically indicated hereinafter. .'
PROTECTIVE COATING SYSTEMS
Polyurethane Coating
Coat all interior concrete surfaces of the wet well and
holding tank with 100 mil MDFT of a 100 percent solids
elastorneric polyurethane coating. Coating shall be
Durathane 100 as manufactured by SANCON Engineering
(619/940-0355), or approved equal. Apply coating per
manufacturer's recommendations. Test for pin-holes and
other imperfections and repair as required. Coating
shall be properly bonded to adjacent non-concrete
surfaces (e.g. access hatch frame) in accordance with
coating manufacturer's recommendations to provide a
permanent watertight joint.
Coal Tar Epoxy Coating
Coal tar epoxy coating shall be System 46H-413 as
manufactured by TNEMEC, or approved equal. Apply
coating in conformance with manufacturer's
recommendations to a thickness of 14-20 mils MDFT. The
following surfaces shall receive this coating unless
otherwise specified on these drawings or unless the item
has a factory-applied coating that is suitable for the
intended service conditions, as approved by the
Engineer.
All carbon steel, cast iron, or aluminum that is
buried or is subject to sewage immersion.
Aluminum that is in contact with a dissimilar metal
or is embedded in, or attached to, concrete.
Buried, exterior concrete surfaces of the pump
room, wet well, and holding tank.
I I
Hot-Dipped Galvanizing
Hot-dipped galvanizing shall conform to the requirements
of ASTM A123-84. All components shall receive an
average coating of 2.3 oz/square foot. Carbon steel
items shall be galvanized as indicated on the drawings
on otherwise specified in these Specifications.
Vinyl Coating
Coating the exposed surfaces of pumps, motors., piping,
valves, fittings, vent pipes, drain lines, and all other
carbon steel items that are within the pump room, with
the vinyl system described below, or equal:
1st coat: 'Tnemec System 33-1211; 1.5 to 2.5 MDFT
2nd coat: Tnemec System 53; 4.0 to 6.0 MDFT
3rd coat: Tnemec System 53; 1.5 to 2.5 MDFT
Color shall be a light green per Owner's approval.
Alkyd Enamel
Coat all carbon steel items located above-grade that are
not provided with a factory- applied finish coating; and
the interior and exterior wood surfaces of the Generator
Building, with the alkyd enamel system described below,
or equal: . .
1st coat: Tnemec Series 36-603; 2.0-3.5 mils MDFT
(primer for wood surfaces)
1st coat: Tnemec Series 10-99; 2.0-3.5 mils MDFT
(primer for metal surfaces)
2nd coat: Tnemec Series 2; . 1.5-2.5 mils MDFT
3rd coat: Tnemec Series 2; 1.5-2.5 mils MDFT
Color shall be light biege per Owner's approval.
Galvanized Metal Conditioning
Galvanized steel items that are specified tobe painted,
shall be conditioned prior to applying the specified top
coat, using one coat of a wash primer @ 0.4 mil MDFT.
Interior Epoxy Lining For Valves, Steel Pipelines, And
Surge Tank .
Line the interior of all valves that are on sewage;
conveying pipelines, steel pipelines, and the interior
of the surge tank with Keysite 740 as manufactured by
SOCO-CO Plastic Coating Company (714/987-4753), or
approved equal.
Polyethlene Lining For Ductile Iron Pipelines
Line the interior of all ductile iron piping with a 40
mu (nominal) polyethylene lining per U.S. Pipe's
"Polylined" system, or approved equal.
Safety Yellow Coating
Guard posts shall be painted with Rustoleum No. 7448
Safety Yellow, or approved equal.
Corrosion Protection TaDe
Wrap buried black steel pipe with Scotch Wrap No. 50
"All-Weather" Corrosion Protection Tape, or approved
equal.
C. FUEL SYSTEM PIPE LABEL AND COLOR SCHEDULE
The fuel oil tanks, and associated piping shall be painted
with the following colors: :
Item Color Color Bands Pipe Label
Fuel Oil Federal Safety Federal Safety Fuel Oil
Supply Orange Red Supply
Fuel Oil Federal Safety Ivory Fuel Oil
Return Orange Return
*
Fuel Tank Federal Safety
Orange
*(including structural steel support frame).
C. WORKMANSHIP
.1. General
Apply all coatings' in strict accordance with the paint
manufacturer's, recommendations, as approved by the
Engineer. Sufficient time shall be allowed between
coats to assure thorough drying of previously applied
paint.
Units to be bolted together and to structures shall be
painted prior to assembly or installation.
2. Shop Primed Surfaces
Areas of chipped, peeled, or abraded primer shall be
hand or power sanded feathering the edges. The areas
shall then be spot primed with the specified or
otherwise required primer. Prior to application of
finish coats, shop primed surfaces shall be cleaned free
of all .dirt, oil and grease, and a mist coat, 1.0 mu
dry film thickness, of the specified primer applied,
complete. Holdback areas for welding shall be prepared
and primed, after welding, as required for the specified
paint system.
Manufacturer Applied Paint Systems
Abraded areas on factory finished items shall be
repaired in strict accordance with the manufacturer's
directions. Repaired areas shall be carefully blended
into the original finish.
Film Thickness
Coverage is listed as total minimum dry film thickness in
mils (MDFT). The number of coats is the minimum
required irrespective of the coating thickness.
Additional coats may be required to obtain the minimum
required paint thickness, depending on method of
application, differences in manufacturers' products, and
atmospheric conditions. Maximum film bui1d per coat
shall not exceed the coating manufacturer's
recommendations. 0
Warranty
The Contractor shall warrant to the Owner and guarantee
the work under this section against defective
workmanship and . materials for a period of 1 year
commencing on date of final acceptance of the work.
X. REINFORCED CAST-IN-PLACE CONCRETE
GENERAL
Concrete work shall conform to the requirements specified
herein and to the applicable requirements of Section 201 and
303 of the Standard Specifications For Public Works Construc-
tion, 1985 Edition; hereinafter referred to as the Standard
Specifications..
-
MIX REQUIREMENTS
2.1 Reinforced Concrete. Unless shown otherwise on the :
drawings Ior specified otherwise herein, concrete shall be of
the following classes and shall be used as follows: .
560-B-3000 concrete: For concrete walls and columns
8-inches and thicker and concrete
slabs 5-inches and thicker.
Maximum slump = 4". .
560-C-3000 concrete: For concrete walls and columns
less than 8-inches thick and
concrete slabs less than 5 inches
thick. Maximum slump = 4".
MATERIALS
3.1 All cement shall be Type II, low alkali Portland
Cement 'conforming to ASTM C-150. . .
3.2 Reinforcing Steel. Reinforcing steel shall conform
to ASTM. A-615 in accordance with Section 201-2 and Sections
303-1.7.1 through 303-1.7.3 of the Standard Specifications.
- 3.2.1. All reinforcing bars 3/8" and larger
shall be deformed bars of new billet steel conforming to ASTM
Specification A-615 Grade 60.
3.2.2 Reinforcing bars shall have 2" of concrete
cover except as otherwise noted on the plans or where
concrete is poured against soil without forms, the cover
shall be 3". Ties shall have 1-1/2" cover minimum.
3.2.3 All hooks and bends shall conform to, the
building code requirements for reinforced concrete (ACI
318-77) unless detailed otherwise.
3.2.4 All bars shall be lapped 45 diameters for
Grade 60 reinforcing but not less than 12" unless detailed
otherwise. . .
6
3.2.5 All dowels shall have the same size and
spacing as that of the reinforcement to which they are
spliced and shall have a minimum lap per paragraph 4.2.4
unless shown otherwise.
3.2.6 All reinforcing shall be continuous
across construction joints unless detailed otherwise.
3.2.7 All concrete construction shall comply with
the applicable requirements of the building code requirements
for reinforced concrete (Ad 318-77).
3.2.8 Dimensions to bars are to bar centerlines
unless noted otherwise..
3.3 Admixtures. All reinforced concrete shall contain
an air entraining agent conforming to Section .201-1.2.4 of
the Standard Specifications.
3.4 Curing Compound. Curing compound shall conform to
Section 201-4 of the Standard Specifications. Curing com-
pound shall not prevent future bond of floor covering, paint
or penetration of floor hardener.
3.5 Clear Liquid Hardener. Clear liquid hardener shall
be Sonneborn "Lapidolith", "Grace Hornlith" or equal, applied
in accordance with printed directions of manufacturer.
4. SAMPLING AND TESTING OF AGGREGATES
Prior to use in the work, Contractor shall submit test
results indicating that aggregate from a proposed source
meets the requirements of these specifications. A report
shall be included with each concrete mix design submittal
showing that aggregate, intended for use in the concrete, is
potentially non-reactive when tested in accordance with ASTM
C289. Tests shall be performed by a reputable independent
testing laboratory and the cost of testing shall be borne by
the Contractor.
If the Engineer deems that additional testing of aggregate is
necessary, he may select samples from any' of the aggregate to
be used on the job and have same tested by any recognized
laboratory of his choice. Such material shall not be used in
the work until test reports are available. If in such tests
the material fails to meet the specified requirements, the
aggregate will be rejected and the expense, of testing shall
be borne by the Contractor. If such tests show the aggregate
to be satisfactory, the cost of additional testing will be
borne by the OWNER.
SETTING AND BUILDING-IN WORK
Unless otherwise specified under other sections of these
specifications, the Contractor shall set and build-in
materials which are required for concrete construction. This
includes structural anchors, anchor slots, bolts, plates,
brackets, etc., which are specified in other sections of the
Specifications, but which are to be embedded in concrete.
The Contractor shall become familiar with and be responsible
for work which is to be set and built-in under this section,
as well as that which will be set by other trades and
built-in under this section.
The Contractor shall see that work specified to be set under
other sections of the Specifications is secured properly for
concrete placing operations, and shall be responsible for
maintaining the proper position of work after having been
set.
No pipes shall be embedded in structural concrete except
where specifically detailed. Conduit One inch or less in
diameter may be embedded if located within the middle half of
the slab..
After having been placed, concrete shall not be cut to place
work left out through oversight, except by approval of the
Engineer.
PROVISIONS AND CONNECTIONS FOR OTHERS
The Contractor shall guard against delay by notifying
subcontractors and the Engineer well in advance of the-time
when their work or equipment is to be furnished or installed.
He shall coordinate his work with work specified under other
divisions or sections of the Specifications, affording every
reasonable facility for the introduction, storage, and
installation of all necessary materials and equipment into
the work.
The Contractor shall install sleeves or other devices
necessary to' form openings for the passage of pipes and
conduits. Boring will not be allowed except as approved by
the Engineer. Sleeves shall be removed prior to the
Contractor grouting the void between the sleeve opening and
the conduit or pipe.
The Contractor shall refer to piping, electrical and
equipment drawings for complete information for all inserts,
openings, recesses and corbels required for piping,
electrical and-equipment.
8.1.1 General: Construction joints shall be in
accordance with Section 303-1.8.6 of the Standard Specifica-
tions. Construction and other joints shall be placed where
indicated on the drawings. Construction joints, other than
those shown on the drawings may be used only with the permis-
sion of the Engineer.
8.1.2 Waterstops: Waterstops shall be provided
at construction joints where indicated on the drawings.
Waterstops shall be extruded from an elastomeric
polyvinylchloride compound containing the necessary
plasticizers, resins, stabilizers, and other materials
necessary to meet the requirements of these specifications
and shall comply with the current Corps of Engineers
Specification .CRD-0572. No reclaimed or scrap materials
shall be used.
The waterstops shall be 6-inches by 31.8-inch, non-split,
serrated type without center bulb. The waterstops shall be
"Elastomer PVC Waterstop" Type SS-7 Flat, as manufactured by
Stratford Materials Corporation; "Servicised/Durajoint", Type
No. 14, as manufactured by Grace Construction Products;
"Kirkhill Vinyl Waterstop" No. KP-1479-9F, as manufactured by
Kirkhill Rubber Co., or equal.
Waterstops shall be spliced at joints and intersections in
accordance with the manufacturer's instructions, and the
details shown on the drawing, using a thermostatically
controlled heating iron. Completed splices shall develop a
minimum tensile strength of 600 psi. Field samples of
fabricated fittings may be selected by the Engineer for
testing by a laboratory at the Contractor's expense.
8.1.3 Epoxy Binder. When indicated on the
drawings, an epoxy binder shall be applied to the concrete
surfaces of construction joints. Epoxy binder shall be Edoco
Epoxy Binder BW, Code No. 2104, as manufactured by Edoco
Technical Products, Inc., Long Beach, California;
Sikastix 370, Sikadur Hi-Mod adhesive as manufactured by Sika
Chemical Corp., Lyndhurst, New Jersey, or equal. Application
shall be in strict conformance with the manufacturer's
recommendations. Concrete surfaces shall be sandblasted
prior to application of the epoxy binder.
9. FORMS
9.1 General. Forms and removal of forms shall be in
accordance with Section 303-1.3 and Section 303-1.4 of the
Standard Specifications, and as specified herein. Prior to
setting reinforcing steel for walls, one side of the forms
shall be set and braced to line and grade. The reinforcing
steel shall then be set accurately and secured firmly in
place.
MIXING, PLACEMENT, AND CONSOLIDATION
5.1 General. Mixing, placement, and consolidation of
concrete shall be in accordance with applicable requirements
of Section 201 and 303 of the Standard Specifications and as
specified herein. The Contractor shall obtain rough grading
approval from the Engineer prior to placing any concrete.
PROPORTIONING
6.1 Basis. Concrete materials shall be proportioned in
accordance with Section 201-1.3 of ' the Standard
Specifications so as to produce a workable mixture in
which the water content will not exceed. . the maximum
specified.
6.2 Control. Mix proportions shall be established to
meet specified requirements by the same laboratory that is
employed for testing aggregates and the. costs for such mix
design shall be' borne by the Contractor.
The exact proportions of 'all materials entering into the
concrete shall be as established by laboratory mix design and
shall be changed only as directed by the Engineer or
laboratory when necessary to obtain specified strength 'or
desired density, uniformity, and workability.
STRENGTH TESTS
Strength tests shall be performed on the concrete as
specified in Section 201-1.1.4 of the Standard Specifica-
tions. All costs 'for testing ,of cylinders by an approved
independent accredited testing laboratory shall be borne by
the Contractor.
If any of the 28'-days tests fail to meet the specified
minimum ultimate compressive strength, the concrete
represented by the failed tests will be assumed to be
defective and the Engineer may direct that cores be taken
from the deficient areas in accordance with ASTM C42. If the
compressive strength of the concrete cores fails to meet the
strength test criteria for concrete cores, the concrete will
be considered defective and shall be removed or adequately
strengthened in a manner acceptable to the Engineer, all at
not cost to the OWNER. Cost. of coring,, testing of cores and
all required repairing pertaining thereto. shall' be paid by
the Contractor.
JOINTS
8.1 Construction Joints.
0
9.2 Tolerances of Forms. Form work shall be
constructed to insure that concrete surfaces will conform to
the following tolerances:
9.2.1. Variation from Plumb: In the lines and
surfaces of columns, piers and walls, and in arrises:
In 10 feet 1/4 inch
In any story or 20 ft. maximum 3/8 inch
In 40 feet or more 3/4 inch
For exposed corner columns, control joint grooves, and other
conspicuous lines: - 0
In any bay or 20 feet maximum 1/4 inch
In 40 feet or more 1/2 inch
9.2.2. Variation from Level or Grades Indicated:
In floors, ceiling, beam soffits, and in arrises:
In 10 feet. 1/4 inch
In any bay or 20 feet maximum 3/8 inch
In 40 feet or more 3/4 inch
For exposed lintels, sills, parapets, horizontal grooves, and
other conspicuous lines:
In any bay or 20 feet maximum 1/4 inch
In 40 feet or more 1/2 inch
9.2.3 Variation of Linear Building Lines: From
established position in plan and related position of columns,
walls and partitions: .
In any bay or 20 feet maximum 1/2 inch
In 40 feet or more 1/2 inch
9.2.4 Variation in Cross-Sectional Dimensions:
Of columns and beams and in the thickness of slabs and walls,
except precast: .
Minus 1/4 inch
Plus 1/4 inch
9.2.5 Variation in reinforcing steel clearance:
Minus 0 inch
Plus 1/4 inch
FINISH OF FORMED SURFACES
10.1 General. The classes of surface finish described
in Section 303-1.9 of the Standard Specifications, shall be
applied to the various parts of concrete structures as
specified therein and below.
10.2 Ordinary Surface Finish. Ordinary surface finish
shall be the final finish for vertical and soffit surfaces of
channels, tanks, wet wells, inlet structures, shafts, and
similar structures which are not exposed to view, and
surfaces which are to receive protective coatings as
specified in the Paint Section, except where a higher class
finish is specified herein.
10.3 Class 1 Surface Finish. Class 1 surface finish
shall conform to Section 303-1.9.3 of the Standard
Specifications and shall be a preparatory finish for surfaces
designated herein to receive the Class 2 surface finish.•
10.4 Class.2 Surface Finish. Class 2 surface finish
shall conform to Section 303-1.9.4 of the Standard Specifica
tions and shall be the final finish for the following sur-
faces which, in general, includes all concrete exposed to
view. This work shall be completed prior to installation of
Miscellaneous Metals, equipment, ducts, fixtures and piping
which are to be fastened to the concrete surface.
10.4.1 Exposed vertical and soffit surfaces
above finished ground and to at least one foot below finished
ground. S S
10.4.2 Exposed vertical surfaces of columns and
equipment pedestals.
10.4.3 Exposed surfaces of retaining walls above
finished ground and to 1' below finished ground.
10.4.4 Exposed interior vertical surfaces above
normal water level and to at least one foot below normal
water level in channels, tanks, and forebay and similar open
structures which are not covered.
10.4.5 Exposed interior wall and soffit surfaces
of drywells, stairwells, pumping plant drywells, galleries
and similar structures.
FINISH OF FLATWORK
0
.
11.1 Finishing. Flatwork finish shall be in accordance
with Section 303-1.9 of the Standard Specifications and as
specified herein. Flatwork finish shall be the final finish
for horizontal surfaces of slabs and walkways, except where
shown otherwise on the drawings.
A smooth troweled cement finish shall be given to all
interior floors not scheduled to have a separate finish and
to floors which are to receive resilient flooring. A "broom"
finish shall be applied to all . structure walkways and all
sidewalks.
11.2 Liquid Hardener. A clear non-slip liquid hardener
shall be applied to interior floors in the Engine Generator
Building and the Pump Room. Liquid hardener shall be applied
in strict accordance with the manufacturer's specifications,
however, not less than 2 coats shall be applied. Floors
shall be free of oil and stains and shall be broom clean when
the hardener is applied.
11.3 Tolerance. Finish work shall contact a 10-foot
straight edge in any direction with 1/8-inch maximum
tolerance. .
STAIRWAY NON-SLIP FINISH
Concrete stairways, landings and steps shall receive a
non-slip finish by appling a broom finish of a texture and
direction as approved by the Engineer; finish at the proper
times after placing and troweling operation. .
CURING
13.1 General. Curing of concrete shall be in accordance
with Section 303-1.10 of the Standard Specifications. :
GROUT AND DRY PACK
14.1 Portland Cement Grout and Drypack. Grout shall be
composed of 1 part Portland cement and not more than 3-1/2
parts of sand by volume with sufficient water for placing.
Dry pack shall be composed of 1 part Portland cement and not
more than 2-1/2 parts of sand with sufficient water for
hydration of cement. .
14.2 Non-Shrink Grout. Where non-shrink grout is
indicated on the drawings, it shall be suitable for the
purpose intended and shall be approved by the Engineer. The
grout shall be mixed, handled, and placed in accordance with
the manufacturer's instructions.
9
IMPORTANT STRUCTURAL DESIGN NOTE
Christensen & Associates has directed NBS/Lowry to assume the
absense of ground water within the zone occupied by the
below-grade concrete structures that comprise this pump
station. If ground water is subsequently discovered to be a
design factor, NBS/Lowry recommends that the structural
design of these below-grade concrete structures be
re-calculated and the design drawings changed accordingly.
ELECTRICAL NOTES
All work shall conform to N.E.C., and utility company
requirements.
Underground service conduits shall be PVC schedule 40.
Where installed for SDG&E use, installation shall be in
accordance with SDG&E Requirements.
Compaction of backfill in trenching shall provide a
density not less than the surrounding adjacent native
soil. Any settlement shall be promptly repaired by
Contractor during the warranty period.
*Conductors shall be copper, type THWN or THHN installed
in galvanized rigid steel conduit. All equipment and
wiring shall 'be weatherproof and/or .explosion proof
where required. '
Fuses shall be current 'limiting type dual element, Buss
type, LPN-R or equal.
Contractor shall, verify location of transformer and
service points in field, and with SDG&E. Contractor
shall be responsible for contacting SDG&E and for all
coordination with SDG&E, including grounding.
Install empty conduit in accordance with . Telephone'
Company ' requirements. Minimum requirements are
galvanized rigid steel conduit 18 inches below grade and
12 inches minimum separation from power conduits.
Terminate telephone conduit in generator building.
Provide ground connection 'point adjacent to conduit
termination in accordance with Telephone Company
requirements. Telephone company will provide circuit
protector. Contractor to notify Telephone Company 45
days in advance of in-service date. Prior to this date,
Contractor shall initiate an inspection visit. See
paragraphs No. 24&25.
Furnish all labor, materials, tools and equipment •for
the complete installation of the electrical work as
shown on the drawings and as required for a complete and
operable pumping station.
Contractor shall obtain and pay for all permits and
arrange for all necessary inspections as required by the
authorities having jurisdiction.
All materials shall be new and all work shall be
installed in a workmanship like manner.
Submit three copies of shop drawings to Owner's
representative for approval before shipping any
equipment to the site.
Submit four copies of drawings or descriptive literature
of each item intended to be substituted for items
specified.
Record drawings shall be kept up to date at the job site
as work. progresses and shall be turned over to Owner's
representative at the completion of the job.
All work shall be guaranteed for a period of one year
after date of acceptance of the installation.
All power conduits shall have an insulated (color green)
grounding conductor installed and bonded at both ends.
17. All conduits shall have a minimum 24 inch earth cover.
Telephone conduits shall be separated from power
conduits by 12 inches where conduits are installed in a
trench.
18. The Contractor shall arrange to have the Telephone
Company pull in the telephone conductors to the pump
station site and terminate the telephone conductors at a
terminal board. All costs for installing the telephone
conductors shall be included in the bid.
19. Telemetering system shall be similar to Capital
Controls Company, Advance Model 1510, automatic dialing
alarm monitor. Alarms will be as follows:
Generator "ON" condition
High water level (i.e. call for lag pump)
Low Pressure Compressor Alarm
Pump Station Flood Alarm
Spare. .
Telemetry system will be located in the pump
room and shall be cable connected to the telephone
system backboard in the generator building.
Contractor shall contact Mr. Larry Willey, City of
Carlsbad at (619) 438-5604 for coordination of the
transmitting equipment required at pump station and for
coordinating the receiving portion of the system and the
automatic dialer.
20. All electrical components in the pump room shall be
explosion proof for Class I, Division I, Group D as
required by the City of Carlsbad standard pump station
requirements.
21. Electrical subcontractor shall coordinate with pump
system supplier, and provide all electric conduit,
wiring appurtenances and connections to ensure a
complete and operable installation.
Electrical subcontractor shall install and connect
factory supplied limit and manual switches for pump room
lights. Lights shall be switched on automatically when
access door is opened.
Electrical subcontractor shall connect pump room blower
to pump station control panel. Blower shall be
switched on automatically when access door is opened.
Conduit locations and runs are diagramatic. Contractor
shall locate runs and stub-outs to suit field
conditions.
Contractor shall extend and install grounding cable to
all electrical enclosures, equipment and pump station
skid.