Department of Natural Resources
State of Colorado
COLORADO PARKS & WILDLIFE
SPECIFICATIONS FOR
Navajo State Park - Lift Stations Replacement
DIVISION I – SPECIFICATIONS
PROJECT I.D. NO. NJ401
MANDATORY PRE-BID CONFERENCE: Friday, March 7, 2014 at 1:00 p.m.
BID OPENING: Thursday, March 20, 2014 at 1:30 p.m.
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TABLE OF CONTENTS
Navajo State Park - Lift Stations Replacement
NJ401
DIVISION I - SPECIFICATIONS
DIVISION 1 - GENERAL REQUIREMENTS
SECTION 01010
SECTION 01023
SECTION 01100
SECTION 01200
SECTION 01300
SECTION 01310
SECTION 01410
SECTION 01500
SECTION 01710
SECTION 01720
-
SUMMARY OF WORK
MINOR CONTRACT REVISION
ALTERNATE PRODUCTS
CONSTRUCTION MEETINGS
SUBMITTALS
CONSTRUCTION SCHEDULES
LABORATORY TESTS
TEMPORARY UTILITIES AND CONTROLS
PROJECT CLEANING
AS-CONSTRUCTED AND RECORD DOCUMENTS
DIVISION 2 - SITE WORK
SECTION 02050
SECTION 02070
SECTION 02210
SECTION 02220
SECTION 02221
SECTION 02279
SECTION 02410
SECTION 02610
-
MOBILIZATION
STRUCTURE REMOVAL
FINISH GRADING
STRUCTURE EXCAVATION AND BACKFILLING
TRENCHING AND BACKFILLING
WATER QUALITY CONTROL
DEWATERING
PIPE AND FITTINGS
DIVISION 3 – CONCRETE
SECTION 03200 SECTION 03301 SECTION 03400 -
CONCRETE REINFORCEMENT
CAST-IN-PLACE STRUCTURAL CONCRETE
PRECAST CONCRETE STRUCTURES
DIVISION 15 – MECHANICAL
SECTION 15010 SECTION 15150 -
GENERAL PROVISIONS
PACKAGED LIFT STATIONS
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DIVISION 1 - GENERAL REQUIREMENTS
GENERAL CONDITION:
Please read the "General Requirements and Covenants" (dated 2003) in your possession. They apply to all
Divisions of these specifications, accompanying drawings and to this proposed project.
SECTION 01010 - SUMMARY OF WORK
1.
LOCATION:
To access the park, located in Archuleta County, take U.S. Highway 160 west from Pagosa Springs for
about 17 miles, then turn south onto State Highway 151 for about 18 miles to Arboles. Turn left
again onto County Road 982 and drive 2 miles to the park.
Project Address: Navajo State Park
1526 County Road 982
Arboles, CO 81121
Archuleta County
Project Coordinates:
2.
Latitude: 37° 0'32.79"N
Longitude: 107°24'27.26"W
DESCRIPTION OF THE WORK:
The project consists of removing and replacing five (5) existing sewage lift stations. Ancillary pipe
connection work, electrical connection work, minor site grading, furnishing five (5) pre-cast
manholes, and concrete pad construction is also included.
All work shall be in compliance with these specifications and construction drawings.
3.
CONSTRUCTION COMMENCEMENT:
The Contractor shall be allowed from the date of approval of contract documents through the
CONTRACT START DATE (as indicated on the Notice to Proceed letter) to submit shop drawings
and product approvals and order and delivery of materials.
4.
ADDITIONAL PROVISIONS:
The work and the compensation, therefore, shall be as covered by these specifications consisting of
furnishing all plant, labor, equipment and materials required to perform the work shown on the
drawings and listed in the bid schedule, unless otherwise stipulated or approved in writing by the
Capital Program Manager.
Division field engineering personnel are authorized to supervise the construction of this project in
accordance with the previously approved plans and specifications and change orders. All changes in the
work shall be approved in writing by the Capital Program Manager before being activated in accordance
with Section 4, Item 4.2 of the General Requirements and Covenants.
1-1
The specifications included herein are the Specifications for this project. If there should be a difference
between the Specifications and the drawings, the Specifications shall govern.
5.
CONTRACTOR RESPONSIBILITY:
Visit the site and determine to your own satisfaction the amount and type of work to be performed to
complete the project in accordance with the drawings, specifications and Contract Documents before
submitting your bid.
You must include as part of the bid documentation the following items:
1.
2.
3.
4.
Minority Business Enterprises Contract Compliance Requirements ( estimated MBE Participation)
Contract Proposal - Pages 1, 2, and 3
Bid Schedule - Signed and addendums acknowledged (if any)
Bid Bond - Can be a Bond, Certified Check or Cashier’s Check only. Required with all Proposals.
Furnish sufficient qualified help to the Engineer for setting construction controls.
Before final payment will be made on the completed contract, submit to the Owner all specified
warranties, other product warranties and the Minority Business Enterprises Compliance Report.
6.
LIQUIDATED DAMAGES:
Liquidated damages for this project shall be a daily charge of $284 for each day beyond the specified
contract time. This daily charge will be deducted from any money due the contractor.
7.
SUBCONTRACTED WORK:
Contractor shall not subcontract any portion of the work without written consent of the Engineer,
which consent shall not unreasonably be withheld. In cases where such consent is given, the
Contractor shall perform with his own organization work amounting to not less than 50 percent of
the total contract cost, as determined by the Engineer, except that any items agreed to by the
Engineer as “specialty items” may be performed by subcontract and the cost of any such specialty
items so performed by subcontractor may be deducted from the total cost before computing the
amount of work required to be performed by the Contractor with his own organization. However,
under no circumstances shall less than 20 percent of the total contract cost be performed by the
Contractor’s organization after deduction of specialty items.
8.
SITE LAYOUT AND STAKING:
Location points for the work will be defined with stakes and/or other means of identification prior to the
start of construction. These location points, grades, and elevations are shown on the drawings. The
drawings indicate existing and proposed elevations, but may be modified on the site by the Engineer.
9.
CONSTRUCTION LIMITS:
At the commencement of construction, the Engineer will designate the area allowed for the
construction process. Restrict work to that designated area. Any changes deemed necessary shall be
discussed with and approved by the Engineer.
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10. MARSHALLING AND ACCESS:
Limits and access to the site for use: before taking possession and use of the site, meet with the
Engineer to determine the marshalling area(s) and access points to be used to execute the work.
Limit access and marshalling areas agreed to at that meeting. Obtain written permission from the
Division of any changes other than first agreed upon. Upon completion of all work, restore all areas
to original or improved conditions.
11. JOB CONDITIONS:
Examine the site, determine the nature of conditions to be encountered and accept the site as found
upon the examination. Examination must be made prior to bidding as no additional compensation
will be considered after receipt of bids for existing conditions which are required to be worked,
adapted, or modified to these specifications.
12. BUILDING CODES:
Local city or county building codes shall be used for all construction. Where there is no local authority
and/or code, the current codes required by the Office of the State Architect, State Electrical Board or
State Plumbing Board shall be utilized. Appropriate inspections and certificates shall be obtained from
the state or local inspector. See relative specification section(s) for additional detail.
13. PROTECTION AND SAFETY PRACTICE:
I.
General:
All work shall be carried out in a safe manner in accordance with local codes and the safety
requirements of the Colorado State Division of Labor.
II.
Provide shoring, sheeting, barricading, bracing to prevent caving, erosion and gullying of side
of excavation. The design, engineering, construction and maintenance of all temporary
protection, including its adequacy and safety shall be the Contractor's responsibility and shall
comply with the Occupational Safety and Health Administration (OSHA).
III.
Existing Utilities:
Colorado SB 93-155 requires that anyone that engages in any type of excavation must provide
advance notice to the underground facility owners. Prior to any moving or excavating of earth,
the Contractor shall call the Utility Notification Center of Colorado (UNCC) or “Common
Ground Alliance” (CGA) – the “Call Before You Dig” number – at 811. Utility owners have
three business days to perform locates. If facilities are not marked within the three business
days, you are required to call back to UNCC and process a Second Notice Request. UNCC
encourages both Contractors and Sub-Contractors to obtain a locate ticket. A “no
response” from the utility owner does not allow the Contractor to start digging. Notify the
Engineer when working near utility lines or appurtenances.
IV.
Aquatic concerns and equipment cleaning:
For this project; If heavy equipment is acquired or used that was previously working in
another stream, river, lake, pond, or wetland, one of the following disinfection practices is
necessary prior to construction to prevent the spread of New Zealand mud snails and other
aquatic hitchhikers into this drainage. The practice is also necessary after project
1-3
completion, prior to this equipment being used in another stream, river, lake, pond, or
wetland, for the same purpose:
V.
•
Remove all mud and debris from equipment (tracks, turrets, buckets, drags, teeth, etc.)
and spray/soak equipment a 1:15 solution of Sparquat institutional cleaner and water.
Keep equipment moist for at least 10 minutes OR
•
Remove all mud and debris from equipment (tracks, turrets, buckets, drags, teeth, etc.)
and spray/soak equipment with water greater than 140 degrees F for at least 10
minutes.
•
Clean hand tools, boots, and any other equipment that will be used in the water using
one of the above options as well.
•
Sparquat 256 Germicidal Cleaner (Spartan Chemical Company, Inc.) is available in the
Denver area from Waxie Denver at (303) 749-8000 or (800) 377-4128, High Country
Chemical at (303) 287-6700 and AmSan Colorado Chemical at (303) 388-9331.
Surface Drainage:
Provide for surface drainage during the construction period in a manner to avoid creating a
nuisance to adjacent properties.
VI.
Location Markers:
Carefully maintain and protect all bench marks, corner monuments and other points. If
disturbed or destroyed, replace at no cost to the Owner as directed by the Engineer.
14. MEASUREMENT AND PAYMENT:
Payment for construction shown on the drawings and specified herein shall be made as noted in the
Bid Schedule.
15. SALES TAX:
Sales tax shall not be charged on projects for the Department of Natural Resources, through the
Colorado Parks & Wildlife.
The Department of Revenue will issue a certificate of exemption (Form No. DR172) to Contractors
or subcontractors. C.R.S. 1973 as amended 39-26-114. The Colorado Parks & Wildlife State Sales
Tax number is 98-02565. Forms can be obtained from the Recorded Forms Request Line at 303238-3278, or at “www.revenue.state.co.us”.
SECTION 01023 - MINOR CONTRACT REVISION
1.
SCOPE OF WORK:
Furnish all labor, materials and equipment required as additional work for completion of the project.
2.
WORK INCLUDED:
1-4
The work shall include unanticipated extra work in excess of the quantities included in the bid
schedule.
3.
PAYMENT:
Payment for minor contract revisions shall be made at the contract unit price, negotiated basis or
force account in accordance with Section 9.4 of the General Requirements and Covenants.
SECTION 01100 - ALTERNATE PRODUCTS
Manufacturer's products listed in the Specifications and on the drawings are intended to show the
results and standard of quality. Other products may be submitted for approval. Submittals are
required for specified products and alternate products in accordance with Section 6 of the General
Requirements and Covenants, Control of Material.
SECTION 01200 - CONSTRUCTION MEETINGS
1.
PRECONSTRUCTION CONFERENCE:
The Contractor or his representative after award of the contract shall attend a preconstruction
conference to be held at the Colorado Parks & Wildlife regional office, Denver office or other office
in proximity to the project as designated by the Engineer.
SECTION 01300 - SUBMITTALS
1.
Provide the manufacturer's literature for products specified or approved equal products as stated in
Section 6 of the General Requirements and Covenants for Capital Construction.
2.
The following is the list of required submittals for this Contract. Refer to each Contract Section for any
additional requirements for each submittal.
SECTION
TITLE
SUBMITTAL DESCRIPTION
01310
CONSTRUCTION
SCHEDULES
Schedule of Construction
01720
AS-CONSTRUCTED
AND RECORD
DOCUMENTS
Construction drawings and technical
specifications indicating changes to the
original project design
02220
STRUCTURE
EXCAVATION AND
BACKFILLING
Imported or Select Material Certified
Gradation
Imported or Select Material Standard
Proctor Test
1-5
DATE
RETURNED
STATUS
SECTION
TITLE
SUBMITTAL DESCRIPTION
Imported or Select Material Soil
Classification
Certified Gradation
Standard Proctor Test
Soil Classification
Relative Density Test
Test Samples, Certification, and Testing:
02221
TRENCHING AND
BACKFILLING
Each roll of geotextile shall be clearly
marked showing the top of the fabric. Two
copies of the mill certificate signed by a
legal authorized officer from the
manufacturer shall be provided for each
consignment. The mill certificate shall state
that the fabric in that shipment meets the
requirements listed below and provide
proof of test results for minimum average.
The Engineer reserves the right to perform
acceptance tests on the samples prior to
acceptance of the material. The minimum
average requirements, as indicated, must be
met before installation of the geotextile.
The Engineer shall be present at the site
during installation and reserves the right to
collect samples periodically for
confirmation testing.
Certified gradation tests on wall backfill
material
Manufacturer's Descriptive Literature and
Recommended Methods of Installation
02610
PIPE AND FITTINGS
Manufacturer's Certification that Products
Meet Specification Requirements
Manufacturer's Certification that Products
Meet Specification Requirements
1-6
DATE
RETURNED
STATUS
SECTION
TITLE
SUBMITTAL DESCRIPTION
03200
CONCRETE
REINFORCEMENT
Placing Drawings, Bending and Cut Sheet
Schedules
Mill Test Reports for Each Shipment of
Reinforcement
Welder Qualifications and Certification by
Testing Laboratory
03252
INSERTS AND
FASTENING
DEVICES
Specification and Descriptive Literature for
Welding Tools to be Used
Complete Shop Drawings of All Weld
Locations, Intersection Details, Support
and Forming Details
Firm name, address and phone number for
testing agency
03300
CAST-IN-PLACE
STRUCTURAL
CONCRETE
Certified Concrete Design Mix
Laboratory Test Results
Aggregate: Gradation Analysis and
Specific Gravity
03400
PRECAST
CONCRETE
STRUCTURES
Shop Drawings
Manufacturer’s Descriptive Language and
Recommended Methods of Installation
Manufacturer’s Operations and
Maintenance Manuals
15150
PACKAGED LIFT
STATIONS
Manufacturer's Data Sheets
Shop Drawings
Executed Warranty
1-7
DATE
RETURNED
STATUS
SECTION 01310 - CONSTRUCTION SCHEDULES
1.
CONSTRUCTION SCHEDULE SUBMITTAL:
Submit to the Engineer, 15 calendar days before commencing construction, a schedule of
construction. The schedule shall include provisions for time necessary to acquire and provide shop
drawings and product submittals, the allowed period for submittal review, time required for ordering
and delivery of materials, a normal time period allowed based on climate, location of project, season
of year, weather patterns for temperature, and precipitation conditions which reasonably will hinder
or prevent construction progress.
The construction schedule shall be updated within 30 calendar days after starting work or upon
issuance of any Contract Modification which substantially affects the scheduling, and monthly
thereafter until completion.
Three copies of newly updated construction schedules shall be forwarded to the Engineer, as
directed, immediately upon preparation.
2.
PRODUCT DELIVERY:
Order products in a timely, properly sequenced manner so that delivery schedule of products
corresponds with anticipated installation periods of these products.
SECTION 01410 - LABORATORY TESTS
1.
REQUIRED TESTS:
I.
Concrete Testing - provided and paid for by the Contractor.
II.
Compaction Tests - provided by the Contractor as specified. Compaction test reports shall be
provided to Owner upon completion of tests.
III.
Proctor Tests - the Contractor shall provide a sample and tests of on-site material from
locations determined by the Engineer.
SECTION 01500 - TEMPORARY UTILITIES AND CONTROLS
1.
TEMPORARY ELECTRIC FACILITIES:
Contractor shall provide and maintain during the course and progress of the contract work all
electrical power and wiring requirements to facilitate the work of all trades and services associated
with the contract work.
2.
HERITAGE RESOURCES:
All persons associated with operations under this authorization must be informed that any objects or
sites of cultural, paleontological, or scientific value such as historic or prehistoric resources, graves
or grave markers, human remains, ruins, cabins, rock art, fossils, or artifacts shall not be damaged,
destroyed, removed, moved, or disturbed. If in connection with operations under this authorization
any of the above resources are encountered, the proponent shall immediately suspend all activities in
1-8
the immediate vicinity of the discovery that might further disturb such materials and notify the
Engineer of the findings. The discovery must be protected until notified in writing to proceed by the
Engineer. (36 CFR 800.110 &112, 43 CFR 10.4)
3.
TEMPORARY HEAT:
Contractor shall provide, at his own expense, all temporary heat as necessary for the proper
installation of all work, equipment, and materials and for the protection of all work and materials
against injury from dampness, cold, and freezing. Fuel, equipment, and methods of heating shall be
in accordance with federal, state, and local regulations.
4.
EXTERIOR STORAGE:
All operations of the Contractor, including storage of materials, shall be confined to areas approved
by the Engineer. Contractor shall be liable for any and all damage caused by him during such use by
him of property of the Owner or other parties. Contractor shall save the Owner, its officers and
agents, and the Engineer and his employees free and harmless from liability of any nature or kind
arising from any use, trespass, or damage occasioned by his operations on premises of third persons
or parties.
5.
STORAGE AND SHOP:
Contractor shall provide all temporary storage and shop rooms that may be required at the work site
for safe and proper storage of tools, materials, etc. The Contractor shall construct such rooms in
storage, only in locations approved by the Engineer, so as not to interfere in any way with the proper
installation and completion of other work. The Contractor shall remove such rooms at the
completion of the work and shall incur all expenses for such removal.
6.
TEMPORARY TELEPHONE SERVICE:
The Contractor shall maintain an operating cell phone and be available by phone during work hours
assuming available cell phone service.
7.
FIRST AID FACILITIES:
A first aid station shall be provided to serve all personnel at the work site. The first aid station shall
be equipped and staffed as required by authorities having jurisdiction.
8.
SECURITY:
The Contractor shall make all necessary provisions and be responsible for the security of the
contract work and the work site until final inspection and acceptance of the contract work.
SECTION 01710 - PROJECT CLEANING
All areas shall be cleared and cleaned upon completion of work at all construction site locations. All
debris and construction materials scattered and blown about the site shall be gathered, returned and
secured to their proper location or disposed of during the construction process and upon completion.
SECTION 01720 – AS-CONSTRUCTED AND RECORD DOCUMENTS
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1.
SCOPE OF WORK:
Maintaining and providing As-Constructed and Record documents for the work described in project
drawings and specifications.
2.
WORK INCLUDED:
The work shall include, but is not necessarily limited to, maintaining a clear and concise set of
construction documents clearly indicating changes to the original project design. Contractor shall
provide all necessary measurements, survey, and product changes to indicate As-Constructed conditions
for the each element of the project.
3.
PAYMENT:
I.
4.
Payment for As-Constructed and Record documents shall not be made as a line item but
shall be included in Mobilization.
SUBMITTALS:
Refer to Section 01300 – Submittals, for requirments. Final payment will not be made until AsConstructed and Record documents are received and accepted as complete by the Project Engineer.
5.
6.
MAINTENANCE OF DOCUMENTS:
I.
Store documents in clean, dry area seperate from documents used for construction.
II.
Documents shall be made available for inspection by Project Engineer upon request.
RECORDING:
I.
The Project Engineer will provide the contractor one set of design drawings and
specifications to record information.
II.
Label each drawing sheet “AS-CONSTRUCTED” and cover sheet of specifications in neat
large printed letters.
III.
Record information concurrently with construction progress.
IV.
A.
Do not backfill work until required information is recorded.
B.
Use dark pen or pencil. Ink shall not be water based and lettering shall be legible
and not subject to easy smearing.
Mark drawings to record actual construction.
A.
Field dimensions, elevations, and details.
B.
Changes made by Project Engineer in approved modifications.
C.
Details not on original drawings.
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D.
Horizontal and vertical locations of underground facilities (pipelines, electric line,
valves, fittings, etc.) and appurtenances referenced to a minimum of two
permanent surface improvements or project coordinates/datum.
End of Section
End of General Requirements
1-11
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SECTION 02050 - MOBILIZATION
1.
SCOPE OF WORK:
Furnish all labor, materials and equipment required to complete the work of the noted Sections of this
Division described herein and on the drawings.
2.
WORK INCLUDED:
The work shall include, but is not necessarily limited to moving onto and off the site all the equipment
and personnel required. It also includes cleaning up the site upon completion of the Contract.
3.
PAYMENT:
I.
Payment for mobilization will be made on a contract lump sum basis as shown in the Bid
Schedule. The lump sum price bid will be paid once only and shall include complete
mobilization and demobilization regardless of the number of times the equipment is moved
or additional equipment transported to the construction site.
Of the lump sum price bid, 50% will be paid when 10% of the work is complete. The
remaining 50% will be paid when the equipment is removed from the site upon completion.
II.
Mobilization shall include the obtaining of all permits, insurance, and bonds, and the
moving onto the site of all plant and equipment; for furnishing and erecting plants,
temporary buildings, and other construction facilities; all as required for the proper
performance and completion of the work. Such work shall include but not be limited to the
following principal items:
A.
Moving onto the site of all the Contractor's plant and equipment required for the
first month's operations.
B.
Installing any temporary construction power and wiring.
C.
Establish fire protection system.
D.
Arrange for and erect the Contractor's work and storage area.
E.
Submit all required insurance certificates and bonds.
F.
Obtain any required permits.
G.
Post all required OSHA notices and establish on-site safety programs.
H.
Have the Contractor's superintendent at job site full time.
I.
Construction schedule.
J.
Wage rates posted.
K.
List of subcontractors.
02050-1
III.
L.
General cleanup of the project area.
M.
Shop drawings and product submittals.
N.
Equipment Cleaning for Aquatic Concerns (see General Requirements Section
01010, under Protection and Safety Practice)
O.
Maintaining and submitting As-Constructed and Record documents per
specifications
The Contractor's attention is directed to the condition that no payment for mobilization, or
any part thereof will be approved for payment nor paid for under the Contract until all
mobilization items listed above have been completed as specified to the extent possible.
End of Section
02050-2
SECTION 02070 - STRUCTURE REMOVAL
1.
SCOPE OF WORK:
Furnish all labor, materials and equipment required to complete the work of the noted Sections of
this Division described herein and on the drawings.
2.
WORK INCLUDED:
The work shall include but is not limited to the complete removal of the items as noted on the
drawings and in the Bid Schedule to allow for installation of equipment or materials as required.
3.
MEASUREMENTS:
Structure removal shall be measured for payment as noted in the Bid Schedule.
4.
EXTENT OF REMOVAL:
All structures shall be removed as indicated on the drawings to not less than two feet below finished
grade beneath any roadway, structure, pipeline or similar improvement.
5.
DISPOSAL OF MATERIAL:
Structures to be removed shall be disposed of by the Contractor off of the work site and in a manner
approved by the Engineer.
End of Section
02070-1
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SECTION 02210 - FINISH GRADING
1.
SCOPE OF WORK:
Furnish all labor, materials and equipment required to complete the work of the noted Sections of
this Division described herein and on the drawings.
2.
WORK INCLUDED:
The work shall include, but is not necessarily limited to, all cutting, filling, compacting of fills and
rough grading required to bring project areas to grade.
3.
MEASUREMENT:
Grading shall not be measured separately but shall be included in the related construction.
4.
FILLS:
Where fill is required to raise the existing grades to the new subgrade elevation indicated on drawings,
such fill shall be of earth placed and compacted as specified. The quality of fill material shall be
approved.
5.
MATERIALS:
Material for fill shall be reasonably free from roots, wood and other organic material. Fill under
surfaced areas shall not contain more than 15 percent clay or loam and no humus. Stones larger than
4 inches, maximum dimension, shall not be used in the upper 6 inches of fill or embankment. Place
the material in successive horizontal layers in loose depths as specified, for the full width of the
cross section. Deposit fill layers not more than 8 inches thick under surface areas.
6.
FINISH GRADING:
Perform finish grading for transition between lines. Grades shall be free of abrupt or irregular
changes.
Grade between existing and finished grades. Round abrupt change in slopes.
Stockpiled topsoil shall be used in the areas used for backslopes and other areas exposed through
construction and equipment damage.
End of Section
02210-1
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SECTION 02220 - STRUCTURE EXCAVATION AND BACKFILLING
1.
SCOPE OF WORK:
Furnish all labor, materials and equipment required to complete the work of the noted Sections of
this Division described herein and on the drawings.
2.
WORK INCLUDED:
The earthwork for structures shall include excavation, trenching, filling, compacting and grading.
Excavate and fill to elevations and dimensions indicated on the drawings and on the site. Allow
additional space as required for construction operations.
3.
MEASUREMENTS:
I.
Earthwork:
Quantities shall not be measured for the required structure earthwork and related
earthwork, but shall be included with the related structure.
II.
Dewatering:
Dewatering shall not be measured separately but shall be included in the related work.
4.
SUBMITTALS:
Refer to Section 01300 - Submittals, for requirements.
5.
6.
QUALITY ASSURANCE:
I.
Classification of Soils: ASTM D 2487.
II.
Density Relations of Soils: Maximum Dry Density as determined by ASTM D 698 or
AASHTO T 99 (Standard Proctor).
III.
Density for Sands and Gravels: Relative Density Method ASTM D 4253 and ASTM D
4254.
IV.
In-place Density Determination: Nuclear Method ASTM D 2922 or Sandcone Method ASTM
D 1556.
FIELD QUALITY CONTROL:
The Contractor may, at any time and at his own expense, obtain field testing from a different
independent testing laboratory for the purpose of controlling his own work operations.
Quality control for earthwork shall be provided by the contractor. The engineer may, at any time,
access the work area to perform quality control testing. Contractor shall allow access for such
testing. No payment or claim will be granted for lost production during testing activities.
7.
MATERIALS:
02220-1
I.
II.
Select Material:
A.
Class I: Angular, 1/4 to 1 1/2 inches, graded stone including slag, cinders and
crushed stone.
B.
Class II: Coarse sand and gravels with maximum particle size of 1/2 inch with no
more than 12% passing a No. 200 sieve. Soil Types GW, GP, SW and SP are
included.
C.
Class III: Fine sand and clayey gravels including sands, sand-clay and gravel-clay
mixtures. Soil Types GM, GC, SM and SC are included.
D.
Class IV: Inorganic silts or clays, silty or clayey fine sands, gravelly or silty clays.
Soil Types ML, CL, MH and CH are included.
Imported Material:
Imported material is defined as material imported by the Contractor for use in place of native
material.
III.
Relative Density:
Where Class I or Class II select material is used, compaction shall be measured by relative
density to the percentages as follows corresponding to the specified Standard Proctor values in
these Specifications.
8.
A.
95% Standard Proctor - 75% Relative Density
B.
90% Standard Proctor - 70% Relative Density
C.
85% Standard Proctor - 65% Relative Density
D.
80% Standard Proctor - 60% Relative Density
EXCAVATION:
I.
General:
Excavation shall be open-cut, except as shown or approved.
Excavation may be sloped or kept vertical where sloping of the excavation does not endanger
any existing utility or structure.
Excavation shall be performed in accordance with applicable federal, state or local safety
codes.
Control grading around the structure so that the ground is pitched to prevent water from
flowing into excavated areas or damaging the foundation. Provide pumping to keep
excavations clear of water.
II.
Underground Obstructions:
02220-2
Locate utilities prior to excavating. Unless otherwise specified, preserve intact pipe or utilities
encountered during construction. If utilities or structures are accidentally damaged, replace
immediately to their original condition.
A.
Unsuitable Bearing:
Excavate such that uniform bearings are obtained throughout. If suitable bearing is
not obtained at the depth indicated on the drawings for the structure bottom,
immediately notify the Engineer. Do not proceed until further instructions are given.
Completely remove subsurface debris and abandoned construction materials
including broken pieces of concrete. Remove such materials within construction lines
to 6 inches below the excavation. Dispose of materials where designated.
B.
Freezing:
When freezing temperatures are expected, do not excavate to the full depth indicated
unless the work can be performed immediately after the excavation has been
completed.
C.
Dimensions:
Excavate to elevations and dimensions where shown. Allow additional space as
required for construction operations and inspection.
III.
Shoring:
Shore, sheet pile and brace excavations as required to maintain them secure. Remove
shoring as backfilling progresses, but only when banks are safe against caving or collapse.
IV.
Classification of Excavation:
Excavation shall be classified as common unless otherwise specified.
A.
Common Excavation:
Common excavation consists of grass, sod, humus, peat, earth, clay, sand, silt,
gravel, hard and compacted materials, such as hardpan, loosely cemented gravel,
soft or disintegrated rock and similar materials that can be removed by hand, heavy
ripping equipment such as tracked equipment with a single ripper with a 15,000
pound pry-out force or a hydraulic excavator with a weight in excess of 50,000
pounds and a drawbar pull in excess of 40,000 pounds. Boulders and loose rock
less than 1 cu. yd. are also classified as common excavation.
V.
Overexcavation:
Excavate so that uniform bearing shall be obtained for the foundation. Do not excavate
below the depth specified. If over excavation occurs, backfill with select material.
VI.
Unsuitable Foundation:
02220-3
The foundation is considered unsuitable when after dewatering, the existing soils are
unstable. Unstable soils are those that are too soft, provide low load bearing or are
otherwise inadequate. Unstable soils include organic soils, fine grain soils saturated with
water in excess of their liquid limit, low density fine sands or silts, and expansive soils.
Cohesive soils or granular cohesive soils with shear strength measured using ASTM D
2166 or ASTM D 2573 of less than 500 psf or sands with penetration resistance measured
using ASTM D 1586 of less than 8 blows per foot are unsuitable.
Where excavation is in shale or rock, or broken concrete occurs, excavate six inches below
grade. No rock, shale or broken concrete shall be within 6 inches of the structure.
VII.
Dewatering:
Where running water, quicksand, or unsuitable foundation conditions are encountered, push
the work with the utmost vigor. Drain water to sumps through well points, underdrains or
other approved methods, providing a completely dry foundation. Ensure that subsurface
water does not interfere with maintaining proper soil moisture for proper compaction of
backfill.
9.
BACKFILLING FOR STRUCTURES:
I.
General:
Backfill against the structure only after approval. Place and compact backfill materials to
minimize settlement and to avoid damage to the structure, waterproofing and connecting
construction. Before placing backfill, remove debris subject to rot or corrosion and other
detrimental materials.
Water shall not be allowed to rise until the concrete has set a minimum of 24 hours, and the
forms have been removed. Water shall not be allowed to rise unequally against unsupported
structural walls.
Do not place brush, sod, frozen material or other perishable or unsuitable materials in the fill.
Distribute material to avoid lenses differing substantially from the surrounding material.
Deliver material to achieve well and uniformly compacted backfill.
II.
Placement:
Place and spread backfill material in 4 in. layers.
Compact backfill to a minimum of 95% of maximum dry density as determined by ASTM D
698 or AASHTO T 99 (Standard Proctor).
III.
Concrete Structures:
Do not backfill or place loads against concrete (including patched areas) before the concrete
has developed at least 70% of the specified strength, or before 7 days after placing the
concrete.
From 7 days to 14 days after placing concrete, backfill operations may be initiated, but no
rolling or hauling equipment will be permitted within 2 feet of the structure. At this time,
02220-4
backfill may be placed against concrete surfaces to a thickness of not more than 2 feet if
compaction is accomplished by power tampers.
IV.
Imported Backfill:
Notify the Engineer when imported material is to be used and indicate where material is to
be placed. Do not place imported fill until approved by the Engineer.
A.
V.
Imported fill shall have the following gradation:
Sieve size or designation
Percentage by Weight
passing square mesh sieve sizes
2 inch
100
No. 4
30-100
No. 50
10-60
No. 200
5-20
B.
In addition, this material shall have a liquid limit not exceeding 35 and a plasticity
index of not over 6 when determined in accordance with AASHTO T 89 and
AASHTO T 90 respectively.
C.
The material shall be Class III or better: fine sand and clayey gravels including sands,
sand-clay and gravel-clay mixtures. Soil Types GM, GC, SM and SC are included.
Grading:
Perform finish grading for smooth transitions between lines. Grades shall be free of abrupt or
irregular changes.
Grade between existing and final grades not otherwise shown to a uniform slope. Round
abrupt change in slopes.
10. INSPECTION:
Backfilling shall not commence until all tests and inspections have been made. Areas to receive
backfill are to be cleared of all rubbish and debris.
End of Section
02220-5
(Page Intentionally Left Blank)
SECTION 02221 - TRENCHING AND BACKFILLING
1.
SCOPE OF WORK:
Furnish all labor, materials and equipment required to complete the work of the noted Sections of
this Division described herein and on the drawings.
2.
WORK INCLUDED:
The earthwork for the pipe installations shall include excavation, trenching, backfilling, compacting
and grading.
3.
MEASUREMENTS:
I.
Trenching and Backfill:
Quantities shall not be measured for trenching, excavating, wasting, pipe embedment,
bedding, backfilling, compacting, and grading, and laboratory testing, but shall be included
in the installation of the pipe.
II.
Dewatering:
Dewatering shall not be measured separately but shall be included in the trenching and
backfilling.
III.
Imported Material:
Imported material shall not be paid but shall be included in the installation of the pipe.
4.
SUBMITTALS:
Refer to Section 01300 - Submittals, for requirements.
5.
6.
QUALITY ASSURANCE:
I.
Classification of Soils: ASTM D 2487 and ASTM D 2488.
II.
Density Relations of Soils: Maximum Dry Density as determined by ASTM D 698 or
AASHTO T 99 (Standard Proctor).
III.
Density for Sands and Gravels: Relative Density Method ASTM D 4253 and ASTM D
4254.
IV.
In-place Density Determination: Nuclear Method ASTM D 2922 or Sandcone Method
ASTM D 1556.
V.
Pipe Embedment Materials: ASTM D 2321.
MATERIALS:
I.
Select Material:
02221-1
II.
A.
General: Provide laboratory tests for the material.
B.
Class I: Angular, 1/4 to 1-1/2 inches, graded stone including slag, cinders and
crushed stone.
C.
Class II: Coarse sand and gravels with maximum particle size of 1-1/2 inch with
no more than 12% passing a No. 200 sieve. Soil Types GW, GP, SW and SP are
included.
D.
Class III: Fine sand and clayey gravels including sands, sand-clay and gravel-clay
mixtures. Soil Types GM, GC, SM and SC are included.
E.
Class IV: Inorganic silts or clays, silty or clayey fine sands, gravelly or silty clays.
Soil Types ML, CL, MH and CH are included.
Imported Material:
Imported material is defined as material imported by the Contractor for use as backfill
material when used in place of native material or material used for pipe embedment where
select material is not required by the Plans and Specifications.
III.
Relative Density:
Where Class I or Class II select material is used, compaction shall be measured by relative
density or Standard Proctor to the percentages as follows corresponding to the specified
Standard Proctor values in these Specifications.
7.
A.
95% Standard Proctor - 75% Relative Density
B.
90% Standard Proctor - 70% Relative Density
C.
85% Standard Proctor - 65% Relative Density
D.
80% Standard Proctor - 60% Relative Density
EXCAVATION:
I.
General:
Excavation shall be open-cut, except as shown or approved.
Trenches may be sloped or kept vertical where sloping of the trench does not endanger any
existing utility or structure.
Trench excavation shall be performed in accordance with applicable federal, state and local
safety codes.
Perform grading necessary to prevent surface water from causing damage to the work.
Place material compactly on the sides of the excavation so as not to endanger the work.
Dispose of surplus material as directed on the site.
II.
Dewatering:
02221-2
Where running water, quicksand, or unsuitable foundation conditions are encountered, push
the work with the utmost vigor. Drain water in the trench to sumps through well points,
underdrains or other approved methods, providing a suitable foundation with no running or
standing water for pipe laying operations. Ensure that subsurface water does not interfere
with maintaining proper soil moisture for a suitable foundation and proper compaction of
backfill.
Maintain dewatering until the pipe has been installed and backfill has been placed to a
height above the water table.
III.
Trench Width:
Minimum trench width shall be as shown on the drawings. Use the minimum width only
when it provides adequate space for workers to place and join the pipe properly. Use
additional width where required for compaction equipment.
IV.
Dimensions:
Excavate to elevations and dimensions shown. Allow additional space as required for
construction operations and inspection.
V.
Obstructions:
Completely remove subsurface debris and abandoned construction materials including
broken pieces of concrete. Remove such materials within construction lines to 6 inches
below excavation. Dispose of the materials where designated. No blasting will be
permitted.
Locate utilities prior to excavating. Unless otherwise specified, preserve intact pipe or
utilities encountered. If utilities or structures are damaged, replace immediately to their
original condition.
VI.
Shoring:
Shore, sheet pile and brace excavations as required to maintain them secure for protection
of workmen or work. Remove shoring as work progresses, but only when banks are safe
from caving or collapse.
VII.
Classification of Excavation:
Excavation shall be classified as common unless otherwise specified.
A.
Common Excavation:
Common excavation consists of grass, sod, humus, peat, earth, clay, sand, silt,
gravel, hard and compacted materials, such as hardpan, loosely cemented gravel,
soft or disintegrated rock and similar materials that can be removed by hand, heavy
ripping equipment such as tracked equipment with a single ripper with a 15,000
pound pry-out force or a hydraulic excavator with a weight in excess of 50,000
pounds and a drawbar pull in excess of 40,000 pounds. Boulders and loose rock
less than 1 cu. yd. are also classified as common excavation.
02221-3
VIII.
Overexcavation:
Excavate so that uniform bearing shall be obtained for the length of the pipe. Do not
excavate below the depth specified. If over excavation occurs, backfill with select material.
IX.
Disturbed Foundation:
Where excavation results in the foundation being disturbed, scarify to a depth of 6 inches
and compact to a density equal to that of the surrounding earth or a minimum of 85% of
maximum dry density, whichever is greater.
X.
Unsuitable Foundation:
The trench bottom is considered unsuitable when after dewatering, the existing soils are
unstable. Unstable soils are those that are too soft, provide low load bearing or are
otherwise inadequate. Unstable soils include organic soils, fine grain soils saturated with
water in excess of their liquid limit, low density fine sands or silts, and expansive soils.
Cohesive soils or granular cohesive soils with shear strength measured using ASTM D
2166 or ASTM D 2573 of less than 500 psf or sands with penetration resistance measured
using ASTM D 1586 of less than 8 blows per foot are unsuitable.
Where the trench is excavated in shale or rock, or broken concrete occurs, excavate six
inches below grade. No rock, shale or broken concrete shall be within 6 inches of the pipe.
XI.
Utilization of Excavated Material:
Suitable material removed from the excavations shall be used, as practical, in the backfill
and at other places as directed.
XII.
Disposal of Surplus and/or Waste Material:
Dispose of surplus and waste material where designated.
Grade areas for draining and a uniform appearance, blending into the surrounding grade.
8.
BACKFILL:
I.
General:
Do not place brush, sod, frozen material or other perishable or unsuitable materials in the
fill. Distribute the material to avoid lenses differing substantially from the surrounding
material.
Place the material to achieve a well and uniformly compacted fill.
II.
Inspection and Approval:
Do not backfill until tests and inspections have been made on work to be covered and
approved. Clear areas to receive backfill of rubbish and debris.
III.
Imported Backfill:
02221-4
Notify the Engineer when imported material is to be used and indicate where material is to
be placed. Do not place imported fill until approved by the Engineer. Provide laboratory
tests for the material.
IV.
Moisture Control:
During compaction operations the material being placed shall be maintained within the
moisture content range required to permit proper compaction to the specified density.
V.
Placement and Methods:
A.
General:
Because of varying trench conditions, the materials used and methods applied may
vary. Individual trench requirements are specified as follows or shown on the
drawings. Backfill only after approval. Maximum depth of lifts shall be 8 inches
unless otherwise specified.
B.
Foundation:
Where the trench bottom is unsuitable for pipe foundation, remove and replace
material with select material. Compact to a minimum of 85% of maximum dry
density.
C.
Pipe Embedment:
1.
Bedding: Place select material from the bottom of the trench to a minimum
of 4 inches or the depth shown on the drawings. Mechanically tamp to a
minimum of 85% of maximum dry density.
2.
Haunching: Shape the trench bottom to provide firm, stable and uniform
support for the full length of the pipe and joints. Dig bell holes to provide a
minimum of 2 inches clearance between the bell and the material. Adjust
pipe for line and grade and make the joint. Place material carefully and tamp
under the haunches of the pipe and in bell holes and sling holes. Place select
material from the bottom of the trench to the springline by hand. Tamp
thoroughly and equally along each side of the pipe to avoid displacement or
damage to the pipe. Compact to a minimum of 85% of maximum dry
density.
Backfill methods shall be approved.
Haunching material shall be the same material as that used for bedding where
Class I or Class II select material is used.
3.
Initial Backfill: Compact select material to a minimum of 85% of maximum
dry density. Do not drop material or perform compaction directly over the
top of the pipe. Place initial backfill from the springline to a minimum depth
of 6 inches over the pipe. Where the final backfill contains particles in
excess of six inches, increase the initial backfill to twelve inches.
4.
Compacted Final Backfill: Mechanically compact lifts to a minimum of 95
percent of maximum dry density. Perform in roadways, dikes, or where
02221-5
otherwise shown on the drawings.
VI.
5.
Semi-Compacted Final Backfill: Place to a minimum of 80% of maximum
dry density in layers not exceeding 3 feet. Mound excess earth.
6.
Topsoil: Place removed topsoil over the trench unless otherwise shown on
the drawings.
Settlement:
Within one year after final acceptance of the project, utilities or other improvements
adversely affected by settlement, repair the settled areas to proper grade and condition at no
expense to the Owner.
VII.
VIII.
Surface Restoration:
A.
Unsurfaced Areas: All surface cuts shall be, as a minimum, restored to a condition
equal to that prior to construction. All streets shall be restored in accordance with
the regulations and requirements of the agency having control or jurisdiction over
the street, roadway, or right-of-way.
B.
Surfaced Areas: All surface cuts shall be, as a minimum, restored to a condition
equal to that prior to construction. All gravel or paved streets shall be restored in
accordance with the regulations and requirements of the agency having control or
jurisdiction over the street, roadway, or right-of-way.
Grading:
Perform finish grading for smooth transitions between lines. Grades shall be free of abrupt
or irregular changes.
Grade between existing and final grades not otherwise shown to a uniform slope. Round
abrupt change in slopes.
End of Section
02221-6
SECTION 02279 - WATER QUALITY CONTROL
1.
SCOPE OF WORK:
Furnish all labor, materials and equipment required to complete the work of the noted Sections of this
Division described herein and on the drawings.
2.
WORK INCLUDED:
The work shall include, but is not necessarily limited to, erosion control, and disposal of water resulting
from dewatering operations as specified.
3.
4.
MEASUREMENT:
I.
Erosion control and disposal of water resulting from dewatering operations shall be considered
as incidental to the construction and all costs thereof shall be included in the related
construction.
II.
Temporary erosion and pollution control measures required due to the Contractor's negligence,
carelessness, or failure to install permanent controls shall be performed at the Contractor's
expense.
QUALITY CONTROL:
I.
The Contractor shall comply with the "Colorado Water Quality Control Act," Title 25,
Article 8, CRS "Protection of Fishing Streams", Title 33, Article 5, CRS; "Clean Water
Act", 33 USC 1344; regulations promulgated; certifications issued; and to the following
requirements.
A.
The Contractor shall provide immediate permanent or temporary pollution control
measures to prevent contamination of adjacent streams, lakes, ponds, or other
watercourses or water impoundments areas.
B.
Cut slopes shall be seeded and mulched as the excavation proceeds. The surface area
of erodible earth material exposed at one time shall not exceed 750,000 square feet
for clearing and grubbing and 750,000 for earthwork operations.
C.
Temporary pollution control shall include conducting required dewatering of
excavations in a manner that avoids pollution and erosion. Water from dewatering
operations shall not be discharged into natural streams or waterway, into irrigation
ditches or canals, or into storm sewers, unless allowed by a point source discharge
permit. Discharge into sanitary sewers shall not be allowed unless written permission
of the Owner or its controlling authority is obtained and this disposal method is
approved by the Engineer. The water from dewatering operations shall be contained
in basins for dissipation by percolation or evaporation, shall be hauled away from the
project for disposal in accordance with applicable laws and regulations, or it shall be
applied to approved non-wetland vegetated areas and allowed to soak into the soil.
Sprinkler or aerial application shall not be used unless approved by the Engineer.
Depending upon the quality of the water, application of water to vegetated areas may
require written concurrence from the Colorado Department of Public Health and
Environment. The Contractor shall ascertain the water quality, and when applicable,
per the Colorado Department of Public Health and Environment's regulations (5CCR
02279-1
1002-8 and others,) obtain the necessary concurrences.
5.
D.
Temporary pollution control shall include construction work outside the project area
where necessary for borrow pits, haul roads and equipment storage sites.
E.
The Contractor shall prepare schedules for accomplishing temporary and permanent
erosion control work and submit them for acceptance at the preconstruction
conference. The schedules for the proposed method of erosion control shall include
all construction activities within the project, haul roads, borrow pits, storage and plant
sites, and the plan for disposal of waste material. Work shall not be started until the
temporary erosion control schedules and methods of operations have been accepted.
F.
The Contractor shall incorporate all permanent erosion control features into the
project at the earliest practicable time as outlined in the accepted schedule. Erosion
control features shall be maintained by the Contractor until the project is accepted.
G.
In the event of conflict between these requirements and water quality control laws,
rules, or regulations of other Federal, State or local agencies, the more restrictive
laws, rules, or regulations shall apply.
PRODUCTS:
I.
Materials:
Mulches may be hay, straw, fiber mats, netting, wood cellulose, corn stalks (shredded or
chopped), corn cobs (shredded or chopped), bark, wood chips, or other suitable material, and
shall be reasonably clean and free of noxious weeds and deleterious materials.
Slope drains may be constructed of pipe, fiber mats, rubble, portland cement concrete,
bituminous concrete, plastic sheeting, or other acceptable materials.
Grass shall be a quick growing species (such as rye grass, or cereal grasses) suitable to the
area, which will provide temporary cover and will not later compete with the grasses sown for
permanent cover.
Fertilizer and soil conditioners shall be acceptable standard commercial grade.
6.
EXECUTION:
I.
Water Quality Control:
A.
Description:
The water quality control work shall consist of temporary measures needed to control
water pollution. These temporary measures shall include the installation of berms,
dikes, dams, sediment basins, fiber mats, netting, gravel, mulches, grasses, slope
drains, and other erosion control devices or methods, at the locations necessary to
control erosion and water pollution.
Temporary pollution controls shall be coordinated with the permanent erosion control
features as shown on the plans.
02279-2
B.
Requirements:
1.
All reasonable steps shall be taken to insure that the Contractor's provisions for
the control of erosion and sedimentation and the protection of water quality
comply with applicable standards, permit conditions, and regulations of appropriate agencies.
2.
Permanent erosion and sediment control measures shall be installed at the
earliest practicable time. One of the first construction activities shall be the
placement of permanent and temporary erosion and sediment control measures
around the perimeter of the project or the initial work areas.
3.
Temporary erosion and sediment control measures shall be coordinated with
permanent measures to assure economical, effective, and continuous control
throughout the construction phase.
4.
Erosion and sediment control measures shall be continuously maintained to perform their intended function during construction of the project.
5.
Construction operations in rivers, streams, lakes, or other bodies of water shall
be restricted to:
a.
Channel change areas designated on the plans.
b.
Areas designated on the plans which must be entered to construct
structures or erosion and sediment control measures; and
c.
Areas where waters must be forded no more than four times per day to
facilitate construction. Fording waters more than four times per day will
not be permitted; temporary bridges or other structures shall be
constructed where more than four crossings per day are required.
6.
Pollutant byproducts of construction, solids, sludges, pollutants removed in the
course of treatment of wastewater, and material from sediment traps shall be
handled, stockpiled, or disposed of in such a manner so entry into any
watercourse or impoundment is prevented.
7.
The use of chemicals such as soil stabilizers, dust palliatives, sterilants, growth
inhibitors, fertilizers, deicing salts, etc., during construction shall be in
accordance with the manufacturer's recommended application rates, frequency,
and instructions. These chemicals shall not be used within 50 feet of the
ordinary high water line of any water course or impoundment.
8.
When a project is subject to a water quality permit, the quantities of discharges,
locations of discharges, composition of discharges, and quantities of dredging
and fills will be stated in the permit. If the Contractor anticipates a change from
permit conditions, or if construction activities result in noncompliance with
permit conditions, the Contractor shall detail the anticipated changes or
noncompliance in a written report to the Engineer. The submission of the report
shall be within five days from the time the Contractor becomes aware of change
or noncompliance. Within 10 days after receipt of the report, the Engineer will
approve or disapprove the request for change, or detail the course of action after
noncompliance.
02279-3
9.
Any diversion from, or bypass of, facilities necessary to maintain compliance
with the terms and conditions contained in these Specifications is prohibited
except, (1) where unavoidable to prevent loss of life or severe property damage,
or (2) where excessive storm drainage or runoff would damage the facilities. If
diversion or bypass of the facilities occurs, the Contractor shall notify the
Engineer in writing within five days of the occurrence. The Engineer will
assess the damage, if any, resulting from the occurrence, and detail a course of
action.
10.
Areas where fuels, lubricants, and other petroleum distillants are stored shall be
restored to their original condition. Equipment servicing shall occur within
approved designated areas.
11.
Areas designated on the plans shall be seeded or revegetated at the earliest
practicable time to prevent soil erosion.
12.
The Contractor shall not place plastic concrete into wetlands, watercourses, or
impoundments.
13.
The practices listed below shall be followed to minimize the pollution of
wetlands, watercourses, and impoundments.
14.
a.
Discharge of dredged or fill material into waterbodies or wetlands shall
not be permitted.
b.
Discharges into spawning areas during spawning seasons shall not be
permitted.
c.
Adverse impacts on the aquatic system caused by the accelerated passage
of water or the restriction of its flow shall be minimized.
d.
Heavy equipment working in wetlands shall be on mats to prevent undue
disturbance and damage to the wetlands area.
e.
Discharge into breeding areas of migratory waterfowl shall not be
permitted.
f.
All temporary fills shall be removed in their entirety.
g.
Heavy equipment use in or around waterbodies or wetlands shall be of
such type that will not produce environmental damage
Requests for clarification of the permit or certification provisions shall be
directed to the Engineer.
End of Section
02279-4
SECTION 02410 - DEWATERING
1.
SCOPE OF WORK:
Furnish all labor, materials and equipment required to complete the work of the noted Sections of this
Division described herein and on the drawings.
2.
WORK INCLUDED:
The work shall include, but is not necessarily limited to, dewatering as specified.
3.
RELATED SECTIONS:
Section 02279 - Water Quality Control.
4.
MEASUREMENT:
Dewatering shall be considered as incidental to the construction and all costs thereof shall be included in
the related construction.
5.
PERMITS
The contractor shall notify the local Water Commissioner with the project location, dewatering plan,
duration, and anticipated groundwater flow volumes before starting any dewatering.
The contractor shall get any required Discharge Permits from the Department of Public Health and
Environment before starting any dewatering. The contractor shall give the engineer a copy of any
permits received for this project.
6.
7.
QUALITY CONTROL:
I.
It shall be the sole responsibility of the Contractor to control the rate and effect of the
dewatering in such a manner as to avoid all objectionable settlement and subsidence.
II.
All dewatering operations shall be adequate to assure the integrity of the finished project and
shall be the responsibility of the Contractor.
III.
Responsibility for conducting the dewatering operation in a manner which will protect
adjacent structures and facilities rests solely with the Contractor. The cost of repairing any
damage to adjacent structures and restoration of facilities shall be the responsibility of the
Contractor.
PRODUCTS:
I.
Equipment:
Before operations begin, the Contractor shall have available on the site sufficient pumping
equipment and/or other machinery to assure that the operation of the dewatering system can be
maintained.
8.
EXECUTION:
02410-1
I.
Dewatering shall be sufficient to ensure water does not interfere with maintaining proper
soil moisture for compaction of backfill.
II.
The normal water table shall be restored to its natural level in such a manner as to not disturb
foundations or other construction.
III.
If well points or wells are used, they shall be adequately spaced to provide the necessary
dewatering and shall be sandpacked and/or other means used to prevent pumping of fine sands
or silts from the subsurface. A continual check by the Contractor shall be maintained to insure
that the subsurface soils are not being removed by the dewatering operation.
IV.
Permanent piping systems and settling ponds may be incorporated in the dewatering system.
Any damage to facilities caused by such use shall be repaired by and at the expense of the
Contractor. Facilities shall be flushed and/or cleaned by the Contractor and left in a suitable
condition as approved by the Engineer.
End of Section
02410-2
SECTION 02610 - PIPE AND FITTINGS
1.
SCOPE OF WORK:
Furnish all labor, materials and equipment required to complete the work of the noted Sections of this
Division described herein and on the drawings.
2.
WORK INCLUDED:
The work shall include, but is not necessarily limited to, the furnishing and installation of all
components required for a complete installation.
3.
MEASUREMENTS:
Quantities shall not be measured separately for pipe, connecting hardware, or structure attachments, but
shall be included into the related construction.
4.
SUBMITTALS:
Refer to Section 01300 - Submittals, for requirements.
5.
PIPE INSPECTION AND INSTALLATION:
I.
Alignment:
Alignment of pipe shall be maintained to the staked lines and grades.
II.
Placement:
Lay pipe with spigot ends directed down-grade unless otherwise directed. Lay pipe, fittings
and accessories with proper equipment and in a manner to prevent damage.
Any defective pipe materials found during the inspection, prior to placing within the trench,
shall be replaced.
All foreign matter or dirt shall be removed from the interior of the pipe before lowering into
position in the trench. Pipe shall be kept clean during and after completion of laying.
Clean the sealing surfaces of the pipe immediately before assembly, and assembly shall be
made as recommended by the manufacturer. Check the completed piping to assure joints are
intact.
Prior to the placement of earthfill or other material around the pipe, observe pipe for leakage.
Repair any leaks. Repeat the procedure until the pipe is watertight (the pipe joints shall show
no leakage).
When pipe laying is not in progress, seal the open ends of installed pipe to prevent entrance of
water into the line. Whenever water is excluded from the interior of the pipe, place enough
backfill on the pipe to prevent floating. Remove any pipe that has floated from the trench and
restore the bedding. No pipe shall be laid when the trench conditions or the weather are
unsuitable for proper installation as determined by the Engineer.
02610-1
III.
Handling:
Haul and handle the pipe in a manner that will avoid damage.
Remove any damaged pipe from the project site and replace. Pipe shall not be repaired for
installation unless approved.
6.
MATERIALS AND INSTALLATION:
I.
PVC Pipe:
A.
General:
PVC pipe shall be manufactured by Certainteed, Diamond Plastics Corp., J-M
Manufacturing, Ipex Inc., or approved equal.
1.
Sewer Pipe:
Pipe and fittings shall be made from Class 12454-B, 12454-C, or 13364-B
virgin compounds in accordance with ASTM D 1784.
B.
C.
Joints:
1.
Bell and Spigot: Pipe joints, complying with ASTM D 3139, shall be made
using an integral bell with an elastomeric gasket push-on type joint or using
machined couplings of a sleeve type with rubber ring gaskets and machined
pipe ends to form a push-on type joint. Rubber ring gaskets shall conform to
ASTM F 477. Adequate gasket lubricant shall be furnished for all of the pipe
and fittings connections.
2.
Solvent Weld: The joints shall meet ASTM D 2672. Only for approved indoor
applications.
PVC Sewer:
PVC sewer pipe and fittings manufactured by Certainteed, or approved equal, shall
conform to ASTM D 3034 and ASTM F 679, SDR-35. Joints shall comply with
ASTM D 3212 for bell and spigot joints using flexible elastomeric seals.
Pressure pipe joints shall have elastomeric seals that comply with ASTM F 477.
II.
Associated Fittings and Adapters:
A.
Adapter Flange: Adapter flanges shall be ductile iron complying with ASTM A
536. The flange shall meet ANSI B16.1 125 lb. flanges and with cast iron flanges
(ANSI B16.1), forged steel flanges (ANSI B16.5), and steel plate flanges (C207).
1.
PVC: Uni-Flange Corp. Series 900, EBAA Iron Series 8500, or approved
equal.
2.
Ductile Iron: Uni-Flange Corp. Series 400, EBAA Iron Series 1000 "EZ", or
approved equal.
02610-2
Set screws shall comply with AISI 4140 steel tensile, 190,000 psi minimum
heat treated and zinc plated.
B.
Flange Hardware: Flange gaskets shall comply with ANSI A21.10 and AWWA
requirements. The 1/8 inches thick gaskets shall be of SBR or neoprene rubber
complying with ANSI requirements.
Flange bolts and nuts of high carbon, heat treated steel shall comply with ANSI
B18.2.1 standard and be zinc chromate plated.
C.
Modular Water Seals: Concrete penetration seals shall be "Link Seal" from
Thunderline Corporation, (www.linkseal.com), supplied by HD Supply,
(www.hdsupply.com).
D.
PVC Fittings: Unless otherwise noted on drawings or in the specifications, fittings
for PVC pipe shall be PVC and certified for the pressure rating of the associated pipe.
Elbow fittings shall be standard angles, a combination of standard angles, or angles
fabricated to the nearest one degree for PIP, IPS, and sewer pipes.
End of Section
02610-3
(Page Intentionally Left Blank)
SECTION 03200 - CONCRETE REINFORCEMENT
1.
SCOPE OF WORK:
Furnish all labor, materials and equipment required to complete the work of the noted Sections of
this Division described herein and on the drawings.
2.
WORK INCLUDED:
The work shall include, but is not necessarily limited to, the furnishing and placement of reinforcing
for structural concrete.
3.
MEASUREMENTS:
Quantities shall not be made for concrete reinforcement but included in related construction.
4.
SUBMITTALS:
Refer to Section 01300 - Submittals, for requirements.
5.
6.
7.
QUALITY ASSURANCE CONTROL:
I.
Manual of Standard Practice for Detailing Reinforced Concrete Structures, ACI 315.
II.
Manual of Standard Practices, Concrete Reinforcing Steel Institute.
PRODUCT DELIVERY, STORAGE AND HANDLING:
I.
Deliver reinforcement to project site in bundles marked to coordinate with placement
drawings.
II.
Handle and store to prevent contamination from dirt, oil and other materials which will
affect bond.
III.
Store a minimum of 6" above ground and in locations where the material will not be
subject to abuse.
PRODUCTS:
I.
Reinforcing Bars:
Bars shall be deformed in accordance with ASTM A 615, ASTM A 616 and ASTM A 617
and formed of either intermediate or hard grades of steel unless otherwise specified. Steel
shall have a 60,000 psi minimum yield point. Reinforcement shall be clean and free from
loose rust, scale or other coatings that will reduce bond.
II.
Tie Wire: Steel, black, annealed, 16-gauge minimum.
III.
Metal Accessories:
Include all spacers, chairs, bolsters, ties, and other devices necessary for properly placing,
spacing, supporting and fastening reinforcement in place.
03200-1
Metal accessories shall be galvanized or plastic coated where legs will be exposed in
finished concrete surfaces. Accessories shall conform to requirements of the Concrete
Reinforcing Steel Institute (CRSI) "Manual of Standard Practice for Reinforced Concrete
Construction."
Chairs and other accessories fabricated from concrete, ceramic or plastic may be used in
place of metal accessories when approved by the Engineer.
IV.
Reinforcing Fibers:
Any
Shall be Propex (www.propexinc.com), “Novomesh 950” or approved equal.
approved equal shall be designed to resist both shrinkage and temperature cracking as well
as flexural strength. Fiber-reinforcement shall be installed in all slabs in accordance with
manufacturer’s recommendations. Fibers shall be used in concrete as indicated on the
drawings.
8.
EXECUTION:
I.
Splices:
A.
Do not splice bars except at locations shown or noted on the drawings or as
otherwise approved.
B.
All effort shall be made to minimize the number of splices on the project. When
splices are used, splices shall meet Type B, ACI 318 requriements.
C.
Tie lap splices securely with wire to prevent displacement of splices during
placement of concrete.
D.
Perform welded splices in accordance with AWS 12.1.
II.
Remove dirt, grease, oil, loose mill scale, excessive rust, and foreign matter that may
reduce bond with concrete.
III.
Keep reinforcing in proper position during concrete placement.
IV.
Maintain minimum concrete cover over reinforcement as specified in ACI 318 or as noted.
V.
Reinforcing Fibers:
Add 1.5 pounds of reinforcing fibers per cubic yard of concrete at the plant or site, as
directed by the Engineer. Fibers shall be uniformly distributed throughout the concrete by
mixing at the rated time and speed.
End of Section
03200-2
SECTION 03301 - CAST-IN-PLACE STRUCTURAL CONCRETE
1.
SCOPE OF WORK:
Furnish all labor, materials and equipment required to complete the work of the noted Sections of this
Division described herein and on the drawings.
2.
WORK INCLUDED:
The work shall include, but is not necessarily limited to, the construction of concrete structures.
3.
4.
MEASUREMENTS:
I.
The structure shall be measured by the cubic yard of concrete or as otherwise designated in the
Bid Schedule.
II.
Quantities shall not be measured for formwork, reinforcing steel, installation of various inserts
and required earthwork, but shall be included in the related construction.
PRODUCTS:
I.
Portland Cement:
Type II, low to moderate alkali, shall conform to CDOT 701.01 (ASTM C 150).
Low to moderate alkali cement will not be required upon approval of submittals certifying the
use of non-reactive aggregate.
II.
III.
Admixtures:
A.
Air-entraining admixture shall meet CDOT section 711.02 (AASHTO M 154).
B.
Water reducing admixtures shall meet CDOT section 711.03 (AASHTO M 194).
C.
Approved fly ash may be substituted for portland cement up to a maximum of 20
percent Class C or 30 percent Class F by weight. Fly ash shall conform to ASTM C
618. Fly ash must be a pre-approved product from a source listed on the Colorado
Department of Transportation’s Approved Products List.
Aggregate:
A.
Fine Aggregate:
Shall conform to CDOT 703.01 (AASHTO M 6).
B.
Coarse Aggregate:
Shall conform to CDIT 703.02 (AASHTO M 80), except crushed hydraulic-cement
concrete shall not be allowed.
Regular, CDOT Class D, concrete shall be made with ¾ inch (19.0 mm) nominal
sized course aggregate.
03301-1
IV.
Mix Proportioning:
Concrete materials shall conform to the requirements of the Section 600 of the latest version of
the Colorado Department of Transportation (CDOT) Standard Specifications for Road and
Bridge Construction, and subsequent revisions thereto.
Concrete shall meet all of the following:
A.
V.
Regular Concrete:
1.
CDOT Class D - Except as otherwise specified, concrete shall have a 28 day
compressive strength of 4,500 psi, minimum.
2.
Minimum cement content: 615 to 660 pounds of cement per cubic yard.
3.
Maximum water to cement ratio, including aggregate surface moisture but
excluding water of absorption of aggregate: 0.44.
4.
Air entrainment content: 5 to 8 percent. Air content of trowel-finished
interior concrete floors shall not exceed 3.0 percent
5.
Slump: The maximum slump of the delivered concrete shall be the slump of
the approved concrete mix design plus 1.5 inches.
Water Quality:
Mixing water shall be clean and free of oil, acid and injurious amounts of vegetable matter,
alkalies and other impurities.
5.
INSTALLATION:
I.
II.
Placing Concrete:
A.
Concrete shall be placed only in the presence of the Engineer.
B.
Prevent the discharge of wet concrete into any stream or lake.
Consolidating Concrete:
A.
III.
Use mechanical vibrating equipment for consolidation.
Patching Formed Surfaces of New Concrete:
After the forms have been removed, all concrete surfaces shall be inspected and patch joints,
voids, stone pockets or other defective areas permitted by the Engineer.
IV.
Slabs On Subgrade:
Compact the foundation material to a minimum of 95% of maximum dry density as
determined by ASTM or AASHTO T 99 (Standard Proctor). Place concrete of the required
thickness and strike off at proper levels.
End of Section
03301-2
rev 11-10-09
SECTION 03400 - PRECAST CONCRETE STRUCTURES
1.
SCOPE OF WORK:
Furnish all labor, materials and equipment required to complete the work of the noted Sections of
this Division described herein and on the drawings.
2.
WORK INCLUDED:
The work shall include, but is not necessarily limited to, furnishing and installing precast concrete
structures.
3.
MEASUREMENTS:
I.
Precast Concrete Structures:
The precast concrete structures shall be measured for each installed as noted in the Bid
Schedule.
4.
SUBMITTALS:
Refer to Section 01300 - Submittals, for requirements.
5.
QUALITY ASSURANCE:
Manufacture, transportation and installation shall be by a company specializing in providing precast
products and services normally associated with precast concrete construction.
I.
Standards:
ACI 318 Building Code Requirements for Reinforced Concrete.
AWS D12.1 Recommended Practices for Welding Reinforcing Steel, Metal Inserts and
Connections in Reinforced Concrete Construction.
Sampling and testing shall be in accordance with the manufacturer's standard procedure,
subject to approval by the Engineer.
6.
PRODUCT DELIVERY AND HANDLING:
Care shall be used in transporting precast concrete structure to the job site. Members shall be
handled in such a manner as to prevent excessive stresses, spalling and undesirable cracking.
Handle by means of lifting inserts.
7.
DESIGN CRITERIA:
I.
Design loading:
A.
Live load:
03400-1
HS-20 in compliance with AASHTO Standard Specifications for Highway
Bridges.
8.
MATERIALS:
All material shall be outlined in ACI 318 and AISC Manual of Steel Construction, conforming to
latest ASTM specifications.
I.
Portland Cement: ASTM C 150, Type II.
II.
Admixtures:
A.
Total air content admixture shall be used meeting ASTM C 260 to achieve a total
air content of 4 to 7 percent for 1 1/2 inch aggregate, 5 to 9 percent for 3/4 inch
and 7 to 10 percent for 3/8 inch.
B.
Water reducing admixtures shall meet ASTM C 494.
C.
Fly ash shall not exceed 15 percent of the total quantity of cementitious materials
and be Class C conforming to ASTM C 618.
III.
Compressive Strength: 4500 psi minimum at 28 days.
IV.
Aggregates: ASTM C 33.
All aggregates, fine and coarse, shall be free of all deleterious substances which cause
reactivity with oxidized hydrogen sulfide. Both sizes of aggregates shall be graded to
produce a homogeneous concrete mix.
V.
VI.
Reinforcing Steel:
A.
Reinforcing bars: ASTM A 615, Grade 60.
B.
Welded wire fabric: ASTM A 185.
C.
All reinforcing steel shall be of the size and in the location as shown on the shop
drawings. Sufficiently tie reinforcing to withstand any displacement during the
concrete placement operation.
Anchors and Inserts:
Supply all necessary lifting inserts and pulling eyes of adequate size for standard attaching
equipment.
VII.
Joint Sealant:
Apply a flexible butyl rubber gasket-type joint sealant RUBR-NEK L-T-M or approved
equal meeting Federal Specification SS-S-210, A to all concrete joints. Place sealant as
recommended by the manufacturer.
VIII.
Manholes:
03400-2
Precast reinforced concrete manhole shall conform to ASTM C 478. Precast manholes to
be supplied by Carder Concrete Products, 8311 West Carder Court, Littleton, CO 81501,
(303) 243-4604, Grand Junction Pipe and Supply, Grand Junction, CO 81501 (970)
243-4604, Vaughn Concrete Products, 12650 Tucson Street, Henderson, Co 80640, (303)
659-3747, or approved equal.
The juncture of line pipe with the manhole structure shall be made with an A-Lok gasket
system (above 24" diameter line pipe) or with Kor-n-Seal gasket system (24" diameter and
smaller line pipe) or an approved equal system that shall allow for some angular deflection
at the pipe/manhole juncture.
IX.
Waterproofing Sealer:
Anti Hydro "A-H Hydroseal" waterproof cement coating or approved equal. Apply to all
exterior surfaces of the new concrete.
X.
Flexible Gaskets:
Flexible plastic gasket shall be RAM-NEK or a approved equal conforming to AASHTO M
198, Type B.
9.
INSTALLATION:
Inspect the bearing surfaces assuring that they are smooth and level prior to the structure
installations.
10. REPAIR:
Patch damage occurring during installation as deemed necessary with the epoxy bonding agent
specified for concrete.
Cut off lifting devices and grout if the devices interfere with the floor slab placement.
End of Section
03400-3
(Page Intentionally Left Blank)
SECTION 15010 - GENERAL PROVISIONS
1.
SCOPE OF WORK:
I.
Description of Systems: The work of Division 15 includes but is not limited to:
A.
II.
Packaged Sewage Lift Station Systems
Work Included
Furnish all labor and materials and perform all operations necessary for the installation of
complete and operating mechancical systems subject to the conditions of the contract. The
work also includes the completion of such mechanical and electrical details not mentioned
or shown which are necessary for the successful operation of all systems; this includes the
furnishing of all materials for filling systems to make them operable, including water, oil
and grease. Prove satisfactory operation of all equipment and controls to the Engineer on
request.
2.
GENERAL:
The drawings indicate the general arrangement of the proposed work. Details of departures due to
actual field conditions or other causes shall be provided for by the Contractor as no extras will be
paid for correcting faulty or poorly arranged and coordinated work.
3.
SUBMITTALS:
Refer to Section 01300 - Submittals, for requirements.
4.
COMPLETE INSTALLATION:
Furnish and install all incidental parts and wiring required for the proper function of all component
parts. The complete installation shall function smoothly and noiselessly to the full extent of the
specifications and drawings. Complete the installation as rapidly as general construction permits.
All safety devices shall be properly installed before starting equipment.
5.
ORDINANCES AND CODES:
All work shall be executed and inspected in accordance with all Underwriter's, Public Utilities, local
and state codes and regulations applicable to the trade affected. Recommendations of ASTM, NFPA
and ASHRAE shall be rigidly followed.
Arrange and pay for all permits in connection with the work hereinafter specified and at completion
of the work, furnish the Owner with the final certificate of inspection.
6.
SHOP DRAWINGS:
I.
Shop Drawings are to be handled in groups, each processed in a different manner as
follows:
A.
Submit shop drawings for all materials and equipment named in these
specifications showing any changes required in piping, ducting, electrical wiring,
space allocation etc. Be responsible to make all changes required to accommodate
15010-1
and to pay for these changes. Coordinate changes required with all other trades.
Pay for all changes resulting from re-arranging equipment.
B.
The following items required shop drawing submittals prior to commencing work:
1.
2.
3.
4.
5.
All fixtures and equipment, including items called out by manufacturers
name and model number.
All substituted items.
All changes from the plans or specifications.
Temperature Controls.
Phase Protection and Starters.
Include copies of these items in the Operating and Maintenance manuals.
Temperature control and other submittals requiring drawings or diagrams shall be
submitted on the same size drawing and format as the construction documents
drawings.
7.
C.
Where shop drawing submittals are required, do not begin work until approved
copies are returned.
D.
Review of shop drawings is for general conformance with the deisgn concept of
the project and does not relieve the Contractor from the responsibility of furnishing
equipment and materials of proper dimension, size, quantity, quality and all
performance characteristics to efficiently perform the requirements and intent of
the contract documents.
Review does not relieve this Contractor from
responsibility for errors on the shop drawings. Approval of a specific item does
not include approval of the assembly of which the item is a component. If the shop
drawings deviate from the contract docuements, advise the Engineer of the
deviations in writing accompanying the shop drawings, including the reasons for
the deviations. Coordinate all required changes with the other trades affected. If
the changes are occasioned by the Contractor, he/she shall pay any costs involved.
OPERATION AND MAINTENANCE DATA:
I.
Submit 3 typed and hard bound copies of Operating and Maintenance Manuals to Engineer
for approval prior to scheduling any system demonstration for the Owner and 15 days prior
to final insepction. Books shall be arranged in sequence to match the equipment schedules
included in the specifications.
II.
The books shall contain, but not be limited to, the following general items; each item shall
be provided with a separate indext tab.
A.
Instructions (On Contractor’s Letterhead Stationary) on who to call for service
during guarantee period including name, address, and 24 hour telephone number of
company responsible for servicing each piece of equipment or system.
B.
Maintenance instructions (On Contractor’s Letterhead Stationary) summarizing
periodic maintenance required for installed system.
C.
Manufacturer’s manuals (current originals, copies are not acceptable) for each
piece of equiment installed (including equipment not requiring shop drawings)
15010-2
identified by drawing code numbers as they appear on the drawing and in the
specifications. Manuals shall include the following, as applicable:
1.
Description of unit and component parts:
a.
b.
c.
d.
e.
2.
Recommended procedures:
a.
b.
c.
3.
g.
8.
Start-up, break-in, routine lubrication and operating instructions and
cautions.
Regulation, control, start/stop, shut-down and emergency instructions.
Any special summer and winter operating cautions.
Maintenance
a.
b.
c.
d.
e.
f.
III.
Function, normal operating characteristics and limiting conditions.
Performance curves, engineering data and tests for pumps and fans.
Curves shall include flow rate, pressure, HP, RPM and efficiency.
Complete nomenclature and commercial part number of replaceable
parts.
Installation instruction sheets.
Complete wiring diagrams.
Routine care.
Guide to trouble shooting.
Disassembly, repair and reassembly.
Alignment, adjusting and checking.
List of required lubricants and schedule.
Parts list, illustrations, assembly drawings and diagrams required for
maintenance.
Prediected life of parts subject to wear.
D.
All warranties provided by the Manufacturer on their equipment that run longer
than the one year warranty by the Contractor.
E.
All equipment start up logs including certification of start up by manufacturer.
These O&M books shall be considered a part of the final insepction and shall be submitted
for approval at least fifteen days prior to a request for a final insepction.
FINAL INSPECTION:
Prior to notifying the Engineer that the project is ready for the final insepction the Contractor must
submit the O&M manual 15 days prior and shall verify, in writing that:
9.
I.
All systems have been properly started and are operational.
II.
All controls are complete, operational and sequences have been checked and are
functioning properly.
DEMONSTRATION:
15010-3
I.
Conduct demonstrations only after systems have been through start-up procedures, systems
are complete and operating, and operating and maintenance data is complete.
II.
Instruct the Owner’s representatives on the proper operation and maintenance of the
mechanical systems. Include seasonal concerns and operations. Contractor to arrange for
this instruction to the Owner.
III.
Time Allotment: Provide demonstrations of adequate time periods, except as noted
elsewhere, to ensure proper understanding of systems by Owner’s representative.
End of Section
15010-4
SECTION 15150 - PACKAGED LIFT STATIONS
1.
SCOPE OF WORK:
Furnish all labor, materials and equipment required to complete the work of the noted Sections of
this Division described herein and on the drawings.
2.
WORK INCLUDED:
Work under this section includes, but is not limited to furnishing and installing a factory built duplex
pump lift station as indicated on the project drawings, herein specified, as necessary for proper and
complete performance.
3.
MEASUREMENTS:
The packaged above ground lift stations shall be measured for each complete, fully operational,
duplex lift station system installed.
4.
SUBMITTALS:
I.
II.
Product Data:
A.
Prior to fabrication, pump station manufacturer shall submit 3 copies of submittal
data for review and approval.
B.
Submittal shall include shop drawings, electrical ladder logic drawings, and
support data as follows: Catalog cuts sheets reflecting characteristics for major
items of equipment, materials of construction, major dimensions, motor and v-belt
drive data, pump characteristic curves showing the design duty point capacity
(GPM), head (FT), net positive suction head required (NPSHr), and hydraulic
brake horsepower (BHP). Electrical components used in the motor branch and
liquid level control shall be fully described.
C.
Shop drawings shall provide layout of mechanical equipment and anchor bolt
locations for station. Pipe penetrations and station access clearances shall be
dimensioned relative to the station centerline. The electrical ladder logic drawings
shall illustrate motor branch and liquid level control circuits to extent necessary to
validate function and integration of circuits to form a complete working system.
Operations and Maintenance Manuals:
A.
Operation shall be in accordance with written instructions provided by the pump
station manufacturer. Comprehensive instructions supplied at time of shipment
shall enable personnel to properly operate and maintain all equipment supplied.
Content and instructions shall assume operating personnel are familiar with pumps,
motors, piping and valves, but lack experience on exact equipment supplied.
B.
Documentation shall be specific to the pump station supplied and collated in
functional sections. Each section shall combine to form a complete system manual
covering all aspects of equipment supplied by the station manufacturer. Support
data for any equipment supplied by others, even if mounted or included in overall
station design, shall be provided by those supplying the equipment. Instructions
shall include the following as a minimum:
15150-1
1.
2.
3.
4.
5.
6.
7.
5.
Functional description of each major component, complete with operating
instructions.
Instructions for operating pumps and pump controls in all modes of
operation.
Calibration and adjustment of equipment for initial start-up, replacement of
level control components, or as required for routine maintenance.
Support data for commercially available components not produced by the
station manufacturer, but supplied in accordance with the specifications, shall
be supported by literature from the prime manufacturer and incorporated as
appendices.
Electrical schematic diagram of the pump station circuits shall be in
accordance with NFPA 70. Schematics shall illustrate, to the extent of
authorized repair, pump motor branch, control and alarm system circuits
including interconnections. Wire numbers and legend symbols shall be
shown. Schematic diagrams for individual components, not normally
repairable by the station operator, need not be included. Details for such parts
shall not be substituted for an overall system schematic. Partial schematics,
block diagrams, and simplified schematics shall not be provided in lieu of an
overall system diagram.
Mechanical layout drawing of the pump station and components, prepared in
accordance with good commercial practice, shall provide installation
dimensions and location of all pumps, motors, valves and piping.
Operation and maintenance instructions which rely on vendor cut-sheets and
literature which include general configurations, or require operating
personnel to selectively read portions of the manual shall not be acceptable.
Operation and maintenance instructions must be specific to equipment
supplied in accordance with these specifications.
GENERAL:
I.
Standards: Publications listed below form part of this specification to extent referenced in the
text by basic designation only. Consult latest edition of publication unless otherwise noted.
A. American National Std. Institute (ANSI) / American Water Works Assoc. (AWWA):
1.
2.
3.
4.
5.
ANSI B16.1
ANSI/AWWA C115/A21.51
ANSI 253.1
ANSI B40.1
AWWA C508
Cast iron pipe flanges and flanged fittings.
Cast/ductile iron pipe with threaded flanges.
Safety Color Code for Marking Physical Hazards.
Gages, Pressure and Vacuum.
Single Swing Check Valves.
B. American Society for Testing and Materials (ASTM):
1.
2.
3.
4.
ASTM A48
ASTM A126
ASTM A307
ASTM A36
Gray Iron Castings.
Valves, Flanges, and Pipe Fittings.
Carbon Steel Bolts and Studs.
Structural Steel.
C. Institute of Electrical and Electronics Engineers (IEEE):
1. IEEE Std 100
2. IEEE Std 112
3. IEEE Std 242
Standard Dictionary of Electrical Terms.
Test Procedure for Polyphase Induction Motors.
Protection of Industrial and Control Power Systems.
15150-2
D. National Electric Code (NEC) / National Electrical Manufacturers’ Assoc. (NEMA):
1. NEC
2. NEMA Std MG1
National Electrical Code.
Motors and Generators.
E. Miscellaneous References:
1. Ten-State Standards Recommended Standards for Sewage Works.
2. Hydraulic Institute Std for Centrifugal, Rotary and Reciprocating Pumps.
3. ISO 9001 International Organization for Standardization.
4. ISO 14001 International Organization for Standardization.
II.
III.
System Description: Design requirements consist of factory built pump station design,
including materials of construction, pump features, valves and piping, and motor controls
shall be in accordance with requirements listed under PRODUCTS of this section.
A.
Contractor shall furnish and install factory built above ground, automatic pump
stations. The station shall be complete with all equipment specified herein, factory
assembled in a fiberglass reinforced polyester resin enclosure.
B.
In addition to the station enclosure, principle items of equipment shall include two
horizontal, self priming, centrifugal sewage pumps, V-belt drives, motors, internal
piping, valves, motor control panel, automatic liquid level control system, and internal
wiring.
Performance Criteria:
A.
Large Stations: Pumps must be designed to handle raw, unscreened, domestic sanitary
sewage. Pumps shall have 4" suction connection, and 4" discharge connection. Each
pump shall be selected to perform under following operating conditions:
1.
2.
3.
4.
5.
6.
7.
B.
180
40
18.2
16.2
17
20
2.5
Small Stations: Pumps must be designed to handle raw, unscreened, domestic sanitary
sewage. Pumps shall have 3" suction connection, and 3" discharge connection. Each
pump shall be selected to perform under following operating conditions:
1.
2.
3.
4.
5.
6.
7.
IV.
Capacity (GPM)
Total Dynamic Head(FT)
Total Dynamic Suction Lift(FT)
Maximum Repriming Lift(FT)
Maximum Static Suction Lift(FT)
Total Discharge Static Head(FT)
Minimum Submergence Depth (FT)
Capacity (GPM)
Total Dynamic Head(FT)
Total Dynamic Suction Lift(FT)
Maximum Repriming Lift(FT)
Maximum Static Suction Lift(FT)
Total Discharge Static Head(FT)
Minimum Submergence Depth (FT)
40
30
14.2
12.2
13
15
2.5
Utility Power Requirements:
A.
Site power furnished to pump station shall be 1 phase, 60 hertz, 230 volts, maintained
within industry standards. Voltage tolerance shall be plus or minus 10 percent. Phase15150-3
to-phase unbalance shall not exceed 1% average voltage as set forth in NEMA
Standard MG-1. Control voltage shall not exceed 132 volts.
6.
QUALITY ASSURANCE:
I.
II.
Manufacturer’s Qualifications:
A.
The pumps and pump station manufacturer must be ISO 9001:2008 revision certified,
with scope of registration including design control and service after sales activities.
B.
The pumps and pump station manufacturer must be registered to the ISO 14001
Environmental Management System standard and as such is committed to minimizing
the impact of its activities on the environment and promoting environmental
sustainability by the use of best management practices, technological advances,
promoting environmental awareness and continual improvement.
C.
Manufacturer must show proof of original product design and testing. Products
violating intellectual property regulations shall not be allowed, as they may violate
international law and expose the user or engineer to unintended liabilities. “Reverseengineered” products fabricated to substantially duplicate the design of original
product shall not be allowed, as they may contain substantial differences in tolerances
and material applications addressed in the original design, which may contribute to
product failure.
D.
The term “pump manufacturer” or “pump station manufacturer” shall be defined as the
entity which designs, machines, assembles, hydraulically tests and warranties the final
product. Any entity that does not meet this definition will not be considered a “pump
manufacturer” or “pump station manufacturer” and is not an acceptable supplier. For
quality control reasons and future pump and parts availability, all major castings of the
pump shall be sourced and machined in North America.
Pump Performance Certifications:
A.
Solids Handling Capability:
1.
B.
All internal passages, impeller vanes, and recirculation ports shall pass a 3”
(4-inch pumps) or 2.5” (3-inch pumps) spherical solid. Smaller internal
passages that create a maintenance nuisance or interfere with priming and
pump performance shall not be permitted. Upon request from the engineer,
manufacturer’s certified drawings showing size and location of the
recirculation port(s) shall be submitted for approval.
Reprime Performance:
1.
Consideration shall be given to the sanitary sewage service anticipated, in
which debris is expected to lodge between the suction check valve and its
seat, resulting in the loss of the pump suction leg, and siphoning of liquid
from the pump casing to the approximate center line of the impeller. Such
occurrence shall be considered normal, and the pump must be capable of
automatic, unattended operation with an air release line installed.
2.
During unattended operation, the pump shall retain adequate liquid in the
casing to insure automatic repriming while operating at its rated speed in a
completely open system. The need for a suction check valve or external
15150-4
priming device shall not be required.
3.
Pump must reprime 18 vertical feet at the specified speed and impeller
diameter. Reprime lift is defined as the static height of the pump suction
above the liquid, while operating with only one-half of the liquid remaining
in the pump casing. The pump must reprime and deliver full capacity within
five minutes after the pump is energized in the reprime condition. Reprime
performance must be confirmed with the following test set-up:
a.
b.
c.
d.
e.
f.
III.
IV.
Factory System Test:
A.
All internal components including the pumps, motors, valves, piping and controls
will be tested as a complete working system at the manufacturer's facility. Tests
shall be conducted in accordance with Hydraulic Institute Standards at the
specified head, capacity, rated speed and horsepower. Factory operational test
shall simulate actual performance anticipated for the complete station.
B.
Upon request from the engineer, the operational test may be witnessed by the
engineer, and/or representatives of his choice, at the manufacturer’s facility.
Manufacturer’s Start-up Services:
A.
V.
A check valve to be installed down stream from the pump discharge
flange. The check valve size shall be equal (or greater than) the pump
discharge diameter.
A length of air release pipe shall be installed between pump and the
discharge check valve. This line shall be open to atmosphere at all
times duplicating the air displacement rate anticipated at a typical
pump station fitted with an air release valve.
The pump suction check valve shall be removed. No restrictions in the
pump or suction piping will prevent the siphon drop of the suction leg.
Suction pipe configuration for reprime test shall incorporate a 2 feet
minimum horizontal run, a 90 degree elbow and vertical run at the
specified lift. Pipe size shall be equal to the pump suction diameter.
Impeller clearances shall be set as recommended in the pump service
manual.
Repeatability of performance shall be demonstrated by testing five
consecutive reprime cycles. Full pump capacity (flow) shall be
achieved within five minutes during each cycle.
Liquid to be used for reprime test shall be water.
The manufacturer's technical representative shall inspect the completed
installation, correct or supervise the correction of any defect or malfunction, and
instruct operating personnel in the proper operation and maintenance of the
equipment as described further down in this section.
Manufacturer's Warranty:
A.
The pump station manufacturer shall warrant all equipment to be of quality
construction, free of defects in material and workmanship. A written warranty
shall include specific details described below.
1.
In addition to defects in material and workmanship, fiberglass reinforced
polyester station enclosures are warranted for sixty (60) months to be
15150-5
2.
B.
Components failing to perform as specified by the engineer, or as represented by
the manufacturer, or as proven defective in service during the warranty period,
shall be replaced, repaired, or satisfactorily modified by the manufacturer.
It is not intended that the station manufacturer assume liability for consequential
damages or contingent liabilities arising from failure of any vendor supplied
product or part which fails to properly operate, however caused. Consequential
damages resulting from defects in design, or delays in delivery are also beyond the
manufacturer's scope of liability.
Equipment supplied by others and incorporated into a pump station or enclosure is
not covered by this limited warranty. Any warranty applicable to equipment
selected or supplied by others will be limited solely to the warranty, if any,
provided by the manufacturer of the equipment.
This limited warranty shall be valid only when installation is made and use and
maintenance is performed in accordance with manufacturer recommendations. A
start-up report competed by an authorized manufacturer’s representative must be
received by manufacturer within thirty (30) days of the initial date the unit is
placed into service. The warranty shall become effective on the date of acceptance
by the purchaser or the purchaser's authorized agent, or sixty (60) days after
installation, or ninety (90) days after shipment from the factory, whichever occurs
first.
C.
D.
E.
6.
resistant to rust, corrosion, corrosive soils, effects of airborne contamination
or physical failures occurring in normal service for the period of the pump
station warranty.
All other equipment, apparatus, and parts furnished shall be warranted for
sixty (60) months, excepting only those items that are normally consumed in
service, such as light bulbs, oils, grease, packing, gaskets, O-rings, etc. The
pump station manufacturer shall be solely responsible for warranty of the
station and all components.
MATERIALS:
I.
Unitary Responsibility: In order to unify responsibility for proper operation of the
complete pumping station, it is the intent of these Specifications that all system components
be furnished by a single supplier (unitary source). The pumping station must be of standard
catalog design, totally warranted by the manufacturer. Under no circumstances will a
system consisting of parts compiled and assembled by a manufacturer's representative or
distributor be accepted.
II.
Manufacturer:
A.
The pump station system integrator must be ISO 9001:2000 revision certified, with
scope of registration including design control and service after sales activities.
B.
The specifications and project drawings depict equipment and materials manufactured
by The Gorman-Rupp Company which are deemed most suitable for the service
anticipated. It is not intended, however, to eliminate other products of equal quality
and performance. The contractor shall prepare his bid based on the specified
equipment for purposes of determining low bid. Award of a contract shall constitute
an obligation to furnish the specified equipment and materials.
C.
After execution of the contract, the contractor may offer substitutions to the specified
equipment for consideration. The equipment proposed for substitution must be
superior in construction and performance to that specified in the contract, and the
15150-6
higher quality must be demonstrated by a list of current users of the proposed
equipment in similar installations.
D.
II.
In event the contractor obtains engineer's approval for equipment substitution, the
contractor shall, at his own expense, make all resulting changes to the enclosures,
buildings, piping or electrical systems as required to accommodate the proposed
equipment. Revised detail drawings illustrating the substituted equipment shall be
submitted to the engineer prior to acceptance.
Station Enclosure:
The station enclosure shall contain and protect all pumps, interior piping, valves and
associated controls. Enclosure shall incorporate the following design and service features:
A.
Access panels must be supplied on all sides. Location and size shall permit access
for routine maintenance functions such as pump and motor inspection, drive belt
adjustment, and pump clean-out. Non-hinged panels shall be secured with
stainless steel tamper-proof hardware.
B.
A continuous hinge and latch shall be installed on at least two access panels. The
hinged panels shall allow easy access to the electrical controls for frequent
adjustments and inspections. A two-point mechanical latch assembly shall secure
the panel at top and bottom. Latch handle locks shall be match keyed, requiring
only one key to open all access panels.
C.
A vent in one access panel shall allow free air flow for enclosure ventilation.
D.
The complete station enclosure, less base, must be completely removable after
disengaging reusable hardware. After disassembly, no portion of the enclosure
(except electrical service entrance) shall project above the base surface to interfere
with maintenance or endanger personnel.
E.
Disassembly and removal of the enclosure shall require no more than two people
working without assistance of lifting equipment.
F.
Station enclosure shall be manufactured of molded reinforced orthophthalic
polyester resins with a minimum of 30% fiberglass, and a maximum of 70% resin.
Resin fillers or extenders shall not be used.
G.
Chopped glass fibers of 1 1/4 inch average length shall be sprayed and rolled.
Major design consideration shall be given to structural stability, corrosion
resistance, and watertight integrity. The polyester laminates shall provide a
balance of mechanical, chemical, and electrical properties to insure long life. They
must be impervious to micro-organisms, mildew, mold, fungus, corrosive liquids,
and gases which are expected to be present in the environment surrounding the wet
well.
H.
All interior surfaces of the housing shall be coated with a polyester resin-rich
finish providing maintenance-free service, abrasion resistance, and protection from
sewage, greases, oils, gasoline, and other common chemicals.
I.
Outside surfaces of the enclosure shall be coated with gel-coat pigmented resin to
insure long maintenance-free life and UV protection.
Color used shall
de-emphasize the presence of dirt, grease, etc.
15150-7
III.
Station Base: Station base shall be constructed of pre-cast, reinforced concrete
encapsulated in a fiberglass mold. The design shall resist deformation of the structure
during shipping, lifting, or handling. Base shall incorporate drainage provisions, and an
opening sized to permit installation of piping and service connections to the wet well.
After installation, the opening shall serve as a grout dam to be utilized by the contractor.
The base shall incorporate anchor bolt recesses for securing the complete station to a
concrete pad (supplied by the contractor) in accordance with the project plans.
IV.
Blower: A blower mounted in the station roof shall be sized to exchange station air volume
at least once every two minutes. Blower motor shall energize automatically at
approximately 70 degrees F, and turn off at 55 degrees F. The blower motor control circuit
shall incorporate a thermal-magnetic circuit breaker providing overcurrent and overload
protection. Exhaust and inlet locations shall prevent the entrance of rain, snow, or debris.
V.
Station Heater: Pump station shall be provided with a 1300/1500 watt, 115 volt electric
heater with cord and grounding plug. Ungrounded heaters shall not be acceptable.
VI.
Insulation Package: The pump station shall be furnished with 1" thick spray foam
insulation, which shall be applied to the roof, doors, and corner panels.
VII.
PUMP DESIGN:
A.
Pumps shall be horizontal, self-priming centrifugal type, designed specifically for
handling raw, unscreened, domestic sanitary sewage. Pump solids handling
capability and performance criteria shall be in accordance with requirements listed
under GENERAL of this section.
B.
The pump manufacturer must be ISO 9001:2000 revision certified, with scope of
registration including design control and service after sales activities.
C.
Materials and Construction Features:
1.
Pump casing: Casing shall be cast iron Class 30 with integral volute scroll.
Casing shall incorporate following features:
a.
b.
c.
d.
2.
Mounting feet sized to prevent tipping or binding when pump is
completely disassembled for maintenance.
Fill port coverplate, 3 1/2" diameter, shall be opened after loosening a
hand nut/clamp bar assembly. In consideration for safety, hand nut
threads must provide slow release of pressure, and the clamp bar shall
be retained by detente lugs. A Teflon gasket shall prevent adhesion of
the fill port cover to the casing.
Casing drain plug shall be at least 1 1/4" NPT to insure complete and
rapid draining.
Liquid volume and recirculation port design shall be consistent with
performance criteria listed under GENERAL of this section.
Coverplate:
Coverplate shall be cast iron Class 30.
incorporate following maintenance features:
a.
Design must
Retained by hand nuts for complete access to pump interior.
Coverplate removal must provide ample clearance for removal of
15150-8
b.
c.
d.
e.
f.
3.
stoppages, and allow service to the impeller, seal, wearplate or check
valve without removing suction or discharge piping.
A replaceable wearplate secured to the coverplate by weld studs and
nuts shall be AISI 1015 HRS.
In consideration for safety, a pressure relief valve shall be supplied in
the coverplate. Relief valve shall open at 75-200 PSI.
Two O-rings of Buna-N material shall seal coverplate to pump casing.
Pusher bolt capability to assist in removal of coverplate. Pusher bolt
threaded holes shall be sized to accept same retaining capscrews as
used in rotating assembly.
Easy-grip handle shall be mounted to face of coverplate.
Rotating Assembly: A rotating assembly, which includes impeller, shaft,
mechanical shaft seal, lip seals, bearings, sealplate and bearing housing, must
be removable as a single unit without disturbing the pump casing or piping.
Design shall incorporate following features:
a.
b.
c.
d.
e.
f.
g.
Sealplate and bearing housing shall be cast iron Class 30. Separate oil
filled cavities, vented to atmosphere, shall be provided for shaft seal
and bearings. Cavities must be cooled by the liquid pumped. Three
lip seals will prevent leakage of oil.
The bearing cavity shall have an oil level sight gauge and fill plug
check valve. The clear sight gauge shall provide easy monitoring of
the bearing cavity oil level and condition of oil without removal of the
fill plug check valve. The check valve shall vent the cavity but
prevent introduction of moist air to the bearings.
Double lip seal shall provide an atmospheric path providing positive
protection of bearings, with capability for external drainage
monitoring.
Impeller shall be ductile iron, two-vane, semi-open, non-clog, with
integral pump out vanes on the back shroud. Impeller shall thread
onto the pump shaft and be secured with a lockscrew and conical
washer.
Shaft shall be AISI 4140 alloy steel unless otherwise specified by the
engineer, in which case AISI 17-4 pH stainless steel shall be supplied.
Bearings shall be anti-friction ball type of proper size and design to
withstand all radial and thrust loads expected during normal operation.
Bearings shall be oil lubricated from a dedicated reservoir. Pump
designs which use the same oil to lubricate the bearings and shaft seal
shall not be acceptable.
Shaft seal shall be oil lubricated mechanical type. The stationary and
rotating seal faces shall be tungsten titanium carbide alloy. Each
mating surface shall be lapped to within three light bands flatness (35
millionths of an inch), as measured by an optical flat under
monochromatic light. The stationary seal seat shall be double floating
by virtue of a dual O-ring design; an external O-ring secures the
stationary seat to the sealplate, and an internal O-ring holds the faces
in alignment during periods of mechanical or hydraulic shock (loads
which cause shaft deflection, vibration, and axial/radial movement).
Elastomers shall be viton. Cage and spring to be stainless steel. Seal
shall be oil lubricated from a dedicated reservoir. The same oil shall
not lubricate both shaft seal and shaft bearings. Seal shall be
warranted in accordance with requirements listed previously in this
specification.
15150-9
h.
4.
Adjustment of the impeller face clearance (distance between impeller and
wearplate) shall be accomplished by external means.
a.
b.
c.
D.
E.
Pusher bolt capability to assist in removal of rotating assembly.
Pusher bolt threaded holes shall be sized to accept same capscrews as
used for retaining rotating assembly.
Clearances shall be maintained by a four point external shimless
coverplate adjustment system, utilizing a four collar and four adjusting
screw design allowing for incremental adjustment of clearances by
hand as required. Each of the four points shall be lockable to prevent
inadvertent clearance increases or decreases due to equipment
vibration or accidental operator contact. The four point system also
allows for equal clearance gaps at all points between the impeller and
wear plate. Requirement of realignment of belts, couplings, etc., shall
not be acceptable. Coverplate shall be capable of being removed
without disturbing clearance settings. Clearance adjustment systems
that utilize less than four points will not be considered.
There shall be provisions for additional clearance adjustment in the
event that adjustment tolerances have been depleted from the
coverplate side of the pump. The removal of stainless steel shims
from the rotating assembly side of the pump shall allow for further
adjustment as described above.
Clearance adjustment which requires movement of the shaft only,
thereby adversely affecting seal working length or impeller back
clearance, shall not be acceptable.
5.
Suction check valve shall be molded Neoprene with integral steel and nylon
reinforcement. A blow-out center shall protect pump casing from hydraulic
shock or excessive pressure. Removal or installation of the check valve must
be accomplished through the coverplate opening, without disturbing the
suction piping. Sole function of check valve shall be to save energy by
eliminating need to reprime after each pumping cycle. Pumps requiring a
suction check valve to assist reprime will not be acceptable.
6.
Spool flanges shall be one-piece cast iron, class 30 fitted to suction and/or
discharge ports. Each spool shall have one 1-1/4" NPT and one 1/4" NPT
tapped hole with pipe plugs for mounting gauges or other equipment.
Serviceability:
1.
The pump manufacturer shall demonstrate to the engineer's satisfaction that
consideration has been given to reducing maintenance costs.
2.
No special tools shall be required for replacement of any components within
the pump.
Drain Kit:
Pumps to be supplied with a drain kit for ease of maintenance. The kit shall
contain 10' length of reinforced plastic hose with a female quick connect fitting at
one end, and factory installed drain fittings in each pump. Fittings include a
stainless steel pipe nipple, stainless steel bushing, stainless steel ball valve and
aluminum male quick connect fitting.
15150-10
F.
Spare Parts Kit:
The following minimum spare parts shall be furnished with the pump station:
1.
2.
3.
4.
VIII.
One pump mechanical seal.
Required cover plate O-Ring(s).
One rotating assembly O-Ring(s).
One set of impeller clearance adjustment spacers.
VALVES AND PIPING:
A.
Check Valve: Each pump shall be equipped with a full flow type check valve
capable of passing a 3" spherical solid. Valve shall be constructed with flanged
ends and fitted with an external lever and torsional spring. Valve seat shall be
constructed of stainless steel, secured to the body to ensure concentricity, sealed by
an O-Ring, and shall be replaceable. The valve body shall be cast iron
incorporating a clean-out port large enough to allow removal and/or replacement
of the valve clapper without removing valve or piping from the line. Valve clapper
shall have a molded neoprene seating surface incorporating low pressure sealing
rings. Valve hinge pin and internal hinge arm shall be stainless steel supported on
each end in brass bushings. Shaft nut shall have double O-Rings which shall be
shall be easily replaceable without requiring access to interior of valve body. All
internal hardware shall be stainless steel. Valve shall be rated at 175 PSI water
working pressure, 350 PSI hydrostatic test pressure. Valves other than full flow
type or valves mounted in such a manner that prevents the passage of a 3"
spherical solid shall not be acceptable.
B.
Plug Valve:
A 3-way plug valve must allow either or both pumps to be
isolated from the force main. The plug valve shall be non-lubricated, tapered type.
Valve body shall be cast iron with flanged end connections drilled to 125 pound
standard. The drip-tight shutoff plug shall be mounted in stainless steel bearings,
and shall have a resilient facing bonded to the sealing surface. Valve shall be
operated with a single lever actuator providing lift, turn, and reseat action. The
lever shall have a locking device to hold the plug in the desired position.
C.
Automatic Air Release Valves:
1.
Each pump shall be equipped with an automatic air release valve designed to
vent air to atmosphere during initial priming or unattended repriming cycles.
Upon completion of the priming or repriming cycle, the valve shall
automatically close operating solely on discharge pressure to prevent excess
recirculation. A visible indication of valve closure shall be evident. Valves
which connect to the suction line or rely on vacuum pumps shall not
acceptable.
2.
The air release valve shall be constructed of UV-inhibiting, high impact
composite polyester containing not less than 30% glass-filler. The valve
body shall incorporate an internal passageway that allows all debris to pass
through the valve chamber between operational cycles, thus making the valve
self-cleaning upon sequential cycles. The valve diaphragms shall be BunaN, Fluorocarbon or EPDM, and shall incorporate a polyester mesh sufficient
to withstand 250 PSI of pressure. Diaphragm materials of lesser-rated
durability will not be deemed equal.
15150-11
X.
3.
The vertical valve plunger shall be constructed of Acetal and at least 20%
PTFE fluorocarbon filler (DuPont Teflon or equivalent). The independent,
dual diaphragms and single, vertical valve plunger shall incorporate a media
fluid that passes through an orifice and separates the actions of each. This
media fluid will impart sufficient energy for each diaphragm to act on the
other to cause a metered stroke, allowing for predictable mechanical
movement, thus opening and closing the valve smoothly, preventing chatter
and harsh ramming forces. Valves with a single horizontal shaft or that do
not incorporate straight-through passageways or media-limiting orifices will
not be acceptable. The valve “seat” shall permit a prescribed bypass of the
liquid being pumped to ensure that the valve does not become hydraulically
locked in submerged discharge piping configurations.
4.
The valve shall employ an externally-adjustable restrictor for applications
below four feet of static discharge head. Valves having no means to
accurately adjust their action, or which require spring selection and
lubrication are unacceptable.
Being mechanically maintenance-free,
provisions for clearing debris in the internal passageway normally associated
with valves of this type are incorporated in the valve design and are
accessible with only normal hand tools.
5.
The valve body shall incorporate passageways having minimal constrictions
and no directional course changes integral to the body of the valve. The inlet
shall be 1 inch NPT female and the discharge outlet shall be 1-1/4 inch NPT
female, assuring that any debris that makes its way through the valve body
will have unobstructed passage back to the source. Valves having smaller
throughput, bends or turns that restrict or impede flow and create pockets or
traps for debris shall not be acceptable. The valve shall be mounted
horizontally, 90 degrees to the vertical plunger by means of an integral
mounting bracket.
6.
The valve shall be able to operate on applications ranging from four to 400
feet of water column without the need for adjustment or interchange of
springs or other parts.
7.
Connection of the air release valves to pump station piping shall include
stainless steel fittings.
Gauge Kit:
A.
A gauge kit shall be supplied for each pump. Suction pressure must be monitored
by a glycerin-filled compound gauge, and discharge pressure by a glycerin-filled
pressure gauge. Gauges to be at least 4 inches in diameter, graduated in feet water
column. Rated accuracy shall be 1% of full scale reading. Compound gauge shall
be graduated -34 to +34 feet water column minimum. Pressure gauge to be
graduated 0 to 140 feet water column minimum.
B.
Gauges to be factory mounted on a resilient panel with frame assembly secured to
pumps or piping. Gauge installations shall be complete with all hoses and stainless
steel fittings, including a shutoff valve for each gauge line at the point of
connection to suction and discharge pipes.
15150-12
XI.
Station Enclosure Low Temperature Alarm:
A.
XII.
Pump station shall be supplied with a thermostat which shall monitor interior
station temperature. The control shall incorporate an unpowered dry contact wired
to terminal blocks for field connection to a remote alarm device. The contact will
close in the event that the temperature within the enclosure falls below
approximately 35 degrees F.
Piping:
A.
Flanged header pipe shall be centrifugally cast, ductile iron, complying with
ANSI/AWWA A21.51/C115 and class 53 thickness.
B.
Flanges shall be cast iron class 125 and Comply with ANSI B16.1.
C.
Pipe and flanges shall be threaded and suitable thread sealant applied before
assembling flange to pipe.
D.
Bolt holes shall be in angular alignment within 1/2 degree between flanges.
Flanges shall be faced with a gasket finish having concentric grooves a minimum
of 0.01 inch deep by approximately 0.03 inch wide, with a minimum of three
grooves on any given surface spaced a maximum of 1/4 inch apart.
XIII.
Supports and Thrust Blocks: Contractor must insure all pipes connected to the pump
station are supported to prevent piping loads from being transmitted to pumps or station
piping. Pump station discharge force main piping shall be anchored with thrust blocks
where shown on the contract drawings.
XIV.
DRIVE UNIT:
A.
Motors, Large Stations (Note: Maximum motor frame size is 326T open dripproof.):
1.
2.
B.
Pump motors shall be 7.5 HP, horizontal ODP, 1,800 RPM, NEMA design B
with cast iron frame with copper windings, induction type, with class F
insulation and 1.15 Service Factor for normal starting torque and low starting
current characteristics, suitable for continuous service. The motors shall not
overload at the design condition or at any head in the operating range as
specified. Motors shall be suitable for operation using the utility power
available.
Motors shall be tested in accordance with provisions of ANSI/IEEE Std. 112,
Method B.
Motors, Small Stations (Note: Maximum motor frame size is 326T open dripproof.):
1.
Pump motors shall be 5.0 HP, horizontal ODP, 1,060 RPM, NEMA design B
with cast iron frame with copper windings, induction type, with class F
insulation and 1.15 Service Factor for normal starting torque and low starting
current characteristics, suitable for continuous service. The motors shall not
overload at the design condition or at any head in the operating range as
specified. Motors shall be suitable for operation using the utility power
available.
15150-13
2.
C.
Motors shall be tested in accordance with provisions of ANSI/IEEE Std. 112,
Method B.
Drive Transmission:
1.
2.
3.
4.
Power to pumps transmitted V-belt drive assemblies. The sheave/belt
combination shall provide the speed ratio needed to achieve the specified
pump operating conditions.
Each drive assembly shall utilize at least two V-belts providing minimum a
combined safety factor of 1.5. Single belt drives or systems with a safety
factor of less than 1.5 are not acceptable. Computation of safety factors shall
be based on performance data published by the drive manufacturer.
Precise alignment tolerances of the drive assemblies shall be achieved by
means of a belt/sheave laser alignment system resulting in the reduction of
vibration, accelerated wear, and premature failure.
The pump manufacturer shall submit power transmission calculations which
document the following:
a.
b.
c.
d.
e.
f.
g.
h.
D.
Pump drives to be enclosed on all sides by a guard constructed of fabricated steel
or combination of materials including expanded, perforated, or solid sheet metal.
No opening to a rotating member shall exceed 1/2 inch.
1.
2.
3.
XV.
Ratio of pump/motor speed.
Pitch diameter of driver and driven sheaves.
Number of belts required per drive.
Theoretical horsepower transmitted per belt, based on vendor's data.
Center distance between pump and motor shafts.
Arc-length correction factor applied to theoretical horsepower
transmitted.
Service factor applied to established design horsepower.
Safety factor ratio of power transmitted/brake horsepower required.
Guards must be completely removable without interference from any unit
component, and shall be securely fastened and braced to the unit base.
Metal to be free from burrs and sharp edges. Structural joints shall be
continuously welded. Rivet spacing on panels shall not exceed five inches.
Tack welds shall not exceed four inch spacing.
The guard shall be finished with one coat of gray W.R. non-lift primer and
one coat of orange acrylic alkyd W.R. enamel in accordance with section 3,
Color Definitions of ANSI 253.1; Safety Color Code for Marking Physical
Hazards.
Finish:
Pumps, piping, and exposed steel framework shall be cleaned prior to painting. Exposed
surfaces to be coated with one coat gray W.R. non-lift primer and one coat white acrylic
alkyd W.R. enamel. Paint shall be low VOC, alkyd based, high solids, semi-gloss white
enamel for optimum illumination enhancement, incorporating rust inhibitive additives. The
finish coat shall be 1.0 to 1.2 MIL dry film thickness (minimum), resistant to oil mist
exposure, solvent contact, and salt spray. The factory finish shall allow for over-coating
and touch up after final installation.
XVI.
ELECTRICAL CONTROL COMPONENTS:
15150-14
A.
The pump station control panel will be tested as an integral unit by the pump
station manufacturer. The control panel shall also be tested with the pump station
as a complete working system at the pump station manufacturer's facility.
B.
Panel Enclosure:
1.
2.
C.
Electrical control equipment shall be mounted within a common NEMA 1
stainless steel, dead front type control enclosures. Doors shall be hinged and
sealed with a neoprene gasket and equipped with captive closing hardware.
Control components shall be mounted on removable steel back panels
secured to enclosure with collar studs.
All control devices and instruments shall be secured to the sub-plate with
machine screws and lockwashers. Mounting holes shall be drilled and
tapped; self-tapping screws shall not be used to mount and component. All
control devices shall be clearly labeled to indicate function.
UL Label Requirement:
Pump station components and controls shall conform to third party safety
certification. The station shall bear a UL label listed for “Packaged Pumping
System”. The panel shall bear a serialized UL label listed for "Enclosed Industrial
Control Panels". The pump station components, panel enclosure, and all
components mounted on the sub-panel or control cover shall conform to UL
descriptions and procedures.
D.
Branch Components:
All motor branch and power circuit components shall be of highest industrial
quality. The short circuit current rating of all power circuit devices shall be a
tested combination or evaluated per the National Electrical Code Article 409. The
lowest rated power circuit component shall be the overall control panel short
circuit rating and shall not be less than the fault current available. The minimum
control panel rating shall not be less than 10 kA, rms symmetrical. Control
assemblies operating at 120 volts nominal or less may be provided with
transformers which limit the fault current and may be rated less than the minimum
required short circuit rating.
E.
Circuit Breakers and Operating Mechanisms:
1.
2.
F.
A properly sized heavy duty circuit breaker shall be furnished for each pump
motor. The circuit breakers must be sealed by the manufacturer after
calibration to prevent tampering.
An operating mechanism installed on each motor circuit breaker shall
penetrate the control panel door. A padlockable operator handle shall be
secured on the exterior surface. Interlocks must prevent opening the door
until circuit breakers are in "OFF" position. An additional mechanism(s)
shall be provided on the circuit breaker permitting the breaker to be operated
and/or locked with the control panel door in the open position.
Motor Starters:
An open frame, across-the-line, NEMA rated magnetic starter with under-voltage
release, and overload protection, shall be furnished for each pump motor. Starters
15150-15
of NEMA size 1 and above shall allow addition of at least two auxiliary contacts.
Starters rated "O", "OO", or fractional size are not acceptable. Power contacts to
be double-break type made of cadmium oxide silver. Coils to be epoxy molded for
protection from moisture and corrosive atmospheres. Contacts and coils shall be
easily replaceable without removing the starter from its mounted position. Each
starter shall have a metal mounting plate for durability.
G.
Overload Relays:
1.
2.
H.
Overload relays shall be solid-state block type, having visual trip indication
with trip-free operation. Electrically resetting the overload will cause one (1)
normally open and one (1) normally closed isolated alarm/control contact to
reset, thus re-establishing a control circuit. Trip setting shall be governed by
solid-state circuitry and adjustable current setting. Trip classes shall be 10,
15 and 20. Additional features to include phase loss protection, selectable
jam/stall protection and selectable ground fault protection.
A reset pushbutton, mounted through the control panel door, shall permit
resetting the overload relays without opening the door.
Phase Monitor:
The control panel shall be equipped to monitor the incoming power and shut down
the pump when required to protect the motor(s) from damage caused by voltage
less than 83% of nominal. The motor(s) shall automatically restart when power
conditions return to normal.
I.
Transient Voltage Surge Suppressor:
1.
J.
The control panel shall be equipped with a transient voltage surge suppressor
to minimize damage to the pump motors and control from transient voltage
surges. The suppressor shall utilize thermally protected silicon-oxide
varistors encapsulated in a non-conductive housing. Mechanical indicators
shall be provided on each phase to indicate protection has been lost. The
suppressor shall have a surge current rating of 100,000 Amps per phase and a
100kA interrupting rating.
Panel Heater:
The control panel shall be equipped with a panel heater to minimize the effects of
humidity and condensation. The heater shall include a thermostat.
K.
Control Circuit:
1.
2.
3.
A normal duty thermal-magnetic circuit breaker shall protect all control
circuits by interrupting control power.
Pump mode selector switches shall permit manual start or stop of each pump
individually, or permit automatic operation under control of the liquid level
control system. Manual operation shall override all shutdown systems,
except the motor overload relays. Selector switches to be oil-tight design
with contacts rated NEMA A300 minimum.
Pump alternation shall be integral to the liquid level controller. Provisions
for automatic alternation or manual selection shall also be integral to the
liquid level controller.
15150-16
4.
5.
6.
7.
L.
Six digit elapsed time meter (non-reset type) shall be connected to each
motor starter to indicate total running time of each pump in "hours" and
"tenths of hours". An integral pilot light shall be wired in parallel to indicate
that the motor is energized and should be running.
A high pump temperature protection circuit shall override the level control
and shut down the pump motor(s) when required to protect the pump from
excessive temperature. A thermostat shall be mounted on each pump casing
and connected to a pump shutdown circuit. If casing temperature rises to a
level sufficient to cause damage, the thermostat causes the shutdown circuit
to interrupt power to the motor. A visible indicator, mounted through the
control panel door shall indicate motor stopped due to high pump
temperature. The motor shall remain locked out until the pump has cooled
and circuit has been manually reset. Automatic reset of this circuit is not
acceptable.
A duplex ground fault receptacle providing 115 VAC, 60 Hz, single phase
current, will be mounted on the side of the control enclosure. Receptacle
circuit shall be protected by a 15 ampere thermal-magnetic circuit breaker.
The lift station shall be equipped with a 3 KVA stepdown transformer to
supply 115 volt, AC, single phase for the control and auxiliary equipment.
The primary and secondary side of the transformer to be protected by a
thermal magnetic circuit breaker, sized to meet the power requirements of the
transformer. An operating mechanism shall penetrate the control panel door
and a padlockable operator handle shall be secured on the exterior surface.
Interlocks must prevent opening the door until circuit breakers are in "OFF"
position. An additional mechanism(s) shall be provided on the circuit
breaker permitting the breaker to be operated and/or locked with the control
panel door in the open position.
Wiring:
1.
2.
3.
The pump station, as furnished by the manufacturer, shall be completely
wired, except for power feed lines to the branch circuit breakers and final
connections to remote alarm devices.
All wiring, workmanship, and schematic wiring diagrams shall comply with
applicable standards and specifications of the National Electric Code (NEC).
All user serviceable wiring shall be type MTW or THW, 600 volts, color
coded as follows:
a.
b.
c.
d.
e.
f.
g.
4.
Line and Load Circuits, AC or DC
power..................................................Black.
AC Control Circuit Less Than Line
Voltage.................................................Red.
DC Control Circuit...............................Blue.
Interlock Control Circuit, from External
Source.......................................Yellow.
Equipment Grounding Conductor.............................Green.
Current Carrying
Ground.......................................................................White.
Hot With Circuit Breaker
Open...............................................................Orange.
Control circuit wiring inside the panel, with exception of internal wiring of
individual components, shall be 16 gauge minimum, type MTW or THW,
15150-17
5.
6.
M.
600 volts. Power wiring to be 14 gauge minimum. Motor branch wiring
shall be 10 gauge minimum.
Motor branch and other power conductors shall not be loaded above the
temperature rating of the connected termination. Wires must be clearly
numbered at each end in conformance with applicable standards. All wire
connectors in the control panel shall be ring tongue type with nylon insulated
shanks. All wires on the sub-plate shall be bundled and tied. All wires
extending from components mounted on door shall terminate at a terminal
block mounted on the back panel. All wiring outside the panel shall be
routed through conduit.
Control wires connected to door mounted components must be tied and
bundled in accordance with good commercial practice. Bundles shall be
made flexible at the hinged side of the enclosure. Adequate length and flex
shall allow the door to swing full open without undue stress or abrasion.
Bundles shall be held on each side of hinge by mechanical fastening devices.
Conduit:
1.
Factory installed conduit shall conform to following requirements:
a.
b.
c.
d.
N.
Grounding:
1.
2.
O.
All conduit and fittings to be UL listed.
Liquid tight flexible metal conduit to be constructed of smooth,
flexible galvanized steel core with smooth abrasion resistant, liquid
tight polyvinyl chloride cover.
Conduit to be supported in accordance with articles 346, 347, and 350
of the National Electric Code.
Conduit shall be sized according to the National Electric Code.
Station manufacturer shall ground all electrical equipment inside the pump
station to the control panel back plate. All paint must be removed from the
grounding mounting surface before making final connection.
The contractor shall provide an earth driven ground connection to the pump
station at the main grounding lug in accordance with the National Electric
Code (NEC).
Equipment Marking:
1.
Permanent corrosion resistant name plate(s) shall be attached to the control
and include following information:
a.
b.
c.
d.
e.
f.
g.
h.
i.
Equipment serial number.
Control panel short circuit rating.
Supply voltage, phase and frequency.
Current rating of the minimum main conductor.
Electrical wiring diagram number.
Motor horsepower and full load current.
Motor overload heater element.
Motor circuit breaker trip current rating.
Name and location of equipment manufacturer.
15150-18
2.
3.
XVII.
Control components shall be permanently marked using the same
identification keys shown on the electrical diagram. Labels shall be mounted
adjacent to device being identified.
Switches, indicators, and instruments mounted through the control panel door
shall be labeled to indicate function, position, etc. Labels shall be mounted
adjacent to, or above the device.
LIQUID LEVEL CONTROL:
A.
The manufacturer of the liquid level control system must be ISO 9001:2000
revision certified, with scope of registration including design control and service
after sales activities.
B.
The level control system shall start and stop the pump motors in response to
changes in wet well level, as set forth herein.
C.
The level control system shall be capable of operating as either an air bubbler type
level control system, submersible transducer type system, or ultrasonic transmitter
type system.
D.
The level control system shall utilize alternation to select first one pump, then the
second pump, to run as lead pump for a pumping cycle. Alternation shall occur at
the end of a pumping cycle, or in the event of excessive run time.
E.
The level control system shall utilize an electronic pressure switch which shall
continuously monitor the wet well level, permitting the operator to read wet well
level at any time. Upon operator selection of automatic operation, the electronic
pressure switch shall start the motor for one pump when the liquid level in the wet
well rises to the "lead pump start level". When the liquid is lowered to the "lead
pump stop level", the electronic pressure switch shall stop this pump. These
actions shall constitute one pumping cycle. Should the wet well level continue to
rise, the electronic pressure switch shall start the second when the liquid reaches
the "lag pump start level", or “standby pump start level” so that all pumps are
operating. These levels shall be adjustable as described below.
F.
The electronic pressure switch shall include integral components to perform all
pressure sensing, signal conditioning, EMI and RFI suppression, DC power supply
and 120 volt outputs. Comparators shall be solid state, and shall be integrated with
other components to perform as described below.
G.
The electronic pressure switch shall be capable of operating on a supply voltage of
12VDC in an ambient temperature range of -10 degrees C (14 degrees F) through
55 degrees C (131 degrees F). Control range shall be 0 to 12.0 feet of water with
an overall repeat accuracy of (plus/minus) 0.1 feet of water. Memory shall be
non-volatile.
H.
The electronic pressure switch shall consist of the following integral components:
pressure sensor, display, electronic comparators and output relays.
1.
The internal pressure sensor shall be a strain gauge transducer and shall
receive an input pressure from the air bubbler system. The transducer shall
convert the input to a proportional electrical signal for distribution to the
display and electronic comparators. The transducer output shall be filtered to
prevent control response to level pulsations or surges. The transducer range
15150-19
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
shall be 0-15 PSI, temperature compensated from -40 degrees C (-40 degrees
F) through 85 degrees C (185 degrees F), with a repeat accuracy of
(plus/minus) 0.25% full scale about a fixed temperature. Transducer
overpressure rating shall be 3 times full scale.
The electronic pressure switch shall incorporate a digital back lighted LCD
panel display which, upon operator selection, shall indicate liquid level in the
wet well, and the preset start and stop level for both lead and lag pump. The
display shall include twenty (20), 0.19" high alpha-numeric characters
calibrated to read out directly in feet of water, accurate to within one-tenth
foot (0.1 foot), with a full scale indication of not less than 12 feet. The
display shall be easily convertible to indicate English or metric units.
Level adjustments shall be electronic comparator set-points to control the
levels at which the lead and lag pumps start and stop. Each of the level
settings shall be easily adjustable with the use of membrane type switches,
and accessible to the operator without opening any cover panel on the
electronic pressure switch. Controls shall be provided to permit the operator
to read the selected levels on the display. Such adjustments shall not require
hard wiring, the use of electronic test equipment, artificial level simulation or
introduction of pressure to the electronic pressure switch.
Each output relay in the electronic pressure switch shall be solid state. Each
relay input shall be optically isolated from its output and shall incorporate
zero crossover switching to provide high immunity to electrical noise. The
"ON" state of each relay shall be indicated by illumination of a light emitting
diode. The output of each relay shall be individually fused providing
overload and short circuit protection. Each output relay shall have an
inductive load rating equivalent to one NEMA size 4 contactor. A pilot relay
shall be incorporated for loads greater than a size 4 contactor.
The electronic pressure switch shall be equipped with an output board which
shall include LED status indicators and a connector with cable for connection
to the main unit.
The electronic pressure switch shall be equipped with pump start delay(s)
preset at a fixed delay time of five (5) seconds.
Circuit design in which application of power to the lag pump motor starter is
contingent upon completion of the lead pump circuit shall not be acceptable.
The electronic pressure switch shall be equipped with a simulator system
capable of performing system cycle testing functions.
The electronic pressure switch shall be capable of controlling liquid levels in
either a pump up or pump down application.
The electronic pressure switch shall have internal capability of providing
automatic alternation, manual selection of pump sequence operation, and
alternation in the event of 1-199 hours excessive run time.
The electronic pressure switch shall be equipped with a security access code
to prevent accidental set-up changes and provide liquid level set-point
lock-out.
The electronic pressure switch shall be equipped with one (1) 0-33 ft. W.C.
input, one (1) scalable analog input of either 0-5VDC, 0-10VDC, or 4-20mA,
and one (1) 4-20mA scalable output. Output is powered by 10-24VDC
supply. Load resistance for 4-20mA output shall be 100-1000 ohms.
The electronic pressure switch shall include a DC power supply to convert
120VAC control power to 12 or 24VDC EPS power. The power supply shall
be 500 mA (6W) minimum and be UL listed Class II power limited power
supply.
The electronic pressure switch shall be equipped with an electronic
comparator and solid state output relay to alert maintenance personnel to a
15150-20
high liquid level in the wet well. An indicator, visible on the front of the
control panel, shall indicate that a high wet well level exists. The alarm
signal shall be maintained until the wet well level has been lowered and the
circuit has been manually reset. High water alarm shall be furnished with a
dry contact wired to terminal blocks.
15. The electronic pressure switch shall be equipped with an electronic
comparator and solid state output relay to alert maintenance personnel to a
low liquid level in the wet well. An indicator, visible on the front of the
control panel, shall indicate that a low wet well level exists. The alarm
signal shall be maintained until the cause for the low wet well level has been
corrected and the circuit has been manually reset. A low liquid level
condition shall disable both pump motors. When the wet well rises above the
low level point, both pump motors shall be automatically enabled. Low
water alarm shall be furnished with a dry contact wired to terminal blocks.
16. An alarm silence pushbutton and relay shall be provided to permit
maintenance personnel to de-energize the audible alarm device while
corrective actions are under way. After silencing the alarm device, manual
reset of the alarm condition shall clear the alarm silence relay automatically.
The pushbutton shall be oil tight design with contacts rated NEMA A300
minimum.
I.
Air Bubbler System:
1.
2.
3.
4.
The level control system shall be the air bubbler type, containing air bubbler
piping which extends into the wet well. A pressure sensor contained within
the electronic pressure switch shall sense the air pressure in this piping to
provide wet well level signals for the remainder of the level control system.
Two vibrating reed, industrial rated, air pumps shall be furnished to deliver
free air at a rate of approximately 5 cubic feet per hour and a pressure not to
exceed 7 psi. Liquid level control systems utilizing air compressors
delivering greater quantities of air at higher pressures, requiring pressure
reducing valves, air storage reservoirs, and other maintenance nuisance items
will not be acceptable. A selector switch shall be furnished to provide
manual alternation of the air pumps. The switch shall be connected in such a
manner that either pump may be selected to operate continuously. The
selector switch shall be oil-tight design with contacts rated NEMA A300
minimum.
An air bell constructed of PVC 3 inches in diameter shall be provided for
installation at the outlet of the air bubbler line in the wet well. The air bell
shall have a 3/8" NPT tapped fitting for connection to the bubbler line.
An air flow indicator gauge shall be provided and connected to the air
bubbler piping to provide a visual indication of rate of flow in standard cubic
feet per hour.
XVIII. LIQUID LEVEL CONTROL – BACK UP (Intrinsically Safe Float Switch Type):
A.
The backup level control system is to work independent of the primary level
control, and utilize a PLC. The control consists of: an intrinsically safe relay, a
small PLC and two non-mercury float switches. The low level float (pump off) is
placed below all primary pump off set-points. The high level float (pump start) is
placed above all primary on set-points. If either float condition is achieved, a
“Float Control Timer” begins to count. When the timer expires, the float control is
latched in, and the floats become active causing an indication light to become
illuminated on the front of the control panel. If the high level float is achieved a
15150-21
pump will start, if the level persists the second pump will start after an adjustable
time period. When the wet well level reaches the low level float, both pumps will
shut off. The float control includes alternation. Dry contacts wired to terminal
blocks will be provided for the float control active alarm circuit. The float control
system will remain latched until manually reset. The redundant float control is
mounted in a separate NEMA 1 stainless steel enclosure. Float system includes
PVC chain and anchor.
B.
Float switches shall be supplied by the manufacturer for installation by the
contractor. Each float shall contain a mercury free switch type sealed in a
polypropylene housing, with 30 feet of power cord, and polypropylene mounting
hardware. A PVC or stainless steel mounting chain and anchor shall be furnished
by the manufacturer for installation by the contractor to secure the switches in the
wet well.
C.
Intrinsically safe relays shall be supplied in a separate level control enclosure.
Relays must be recognized and listed as intrinsically safe by a nationally
recognized testing laboratory. Station manufacturer shall make all connections
from relays to feeder lines and motor controls. Installing contractor shall make
connections from relays to float switch junction box.
D.
Alarm Light (External):
Station manufacturer will supply one 115 VAC alarm light fixture with vapor-tight
shatter resistant red globe, conduit box, and mounting base. The design must
prevent rain water from collecting in the gasketed area of the fixture, between the
base and globe. The alarm light will be shipped loose for installation by the
contractor.
7.
EXECUTION:
I.
EXAMINATION:
Contractor shall off-load equipment at installation site using equipment of sufficient size
and design to prevent injury or damage. Station manufacturer shall provide written
instruction for proper handling. Immediately after off-loading, contractor shall inspect
complete pump station and appurtenances for shipping damage or missing parts. Any
damage or discrepancy shall be noted in written claim with shipper prior to accepting
delivery. Validate all station serial numbers and parts lists with shipping documentation.
Notify the manufacturer’s representative of any unacceptable conditions noted with
shipper.
II.
INSTALLATION:
A.
Install, level, align, and lubricate pump station as indicated on project drawings.
Installation must be in accordance with written instructions supplied by the
manufacturer at time of delivery.
B.
Suction pipe connections are vacuum tight. Fasteners at all pipe connections must
be tight. Install pipe with supports and thrust blocks to prevent strain and vibration
on pump station piping. Install and secure all service lines (level control, air
release valve or pump drain lines) as required in wet well.
15150-22
III.
C.
Check motor and control data plates for compatibility to site voltage. Install and
test the station ground prior to connecting line voltage to station control panel.
D.
Prior to applying electrical power to any motors or control equipment, check all
wiring for tight connection. Verify that protective devices (fuses and circuit
breakers) conform to project design documents. Manually operate circuit breakers
and switches to ensure operation without binding. Open all circuit breakers and
disconnects before connecting utility power. Verify line voltage, phase sequence
and ground before actual start-up.
E.
After all anchor bolts, piping and control connections are installed, completely fill
the grout dam in the pump station base with non-shrink grout.
FIELD QUALITY CONTROL:
A.
Operational Test:
1.
2.
B.
Prior to acceptance by owner, an operational test of all pumps, drives, and
control systems shall be conducted to determine if the installed equipment
meets the purpose and intent of the specifications. Tests shall demonstrate
that all equipment is electrically, mechanically, structurally, and otherwise
acceptable; it is safe and in optimum working condition; and conforms to the
specified operating characteristics.
After construction debris and foreign material has been removed form the
wet well, contractor shall supply clear water volume adequate to operate
station through several pumping cycles. Observe and record operation of
pumps, suction and discharge gage readings, ampere draw, pump controls,
and liquid level controls.
Check calibration of all instrumentation
equipment, test manual control devices, and automatic control systems. Be
alert to any undue noise, vibration or other operational problems.
Manufacturer’s Start-up Services:
Coordinate station start-up with manufacturer’s technical representative. The
representative or factory service technician will inspect the completed installation.
He will calibrate and adjust instrumentation, correct or supervise correction of
defects or malfunctions, and instruct operating personnel in proper operation and
maintenance procedures.
IV.
CLEANING:
Prior to acceptance, inspect interior and exterior of pump station for dirt, splashed material
or damaged paint. Clean or repair accordingly. Remove from the job site all tools, surplus
materials, scrap and debris.
V.
PROTECTION:
The pump station should be placed into service immediately. If operation is delayed, drain
water from pumps and piping. Open motor circuit breakers and protect station controls and
interior equipment from cold and moisture. Station is to be stored and maintained per
manufacturer’s written instructions.
End Of Section
15150-23
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