SECTION 01100 SUMMARY OF WORK

This spec was part of the Des Plaines, IL River WRF project that bid Feb 26, 2015.


SECTION 01100 SUMMARY OF WORK

PART 1 GENERAL

1.1 SECTION INCLUDES

A. Description of Work.

B. Work by Owner.

C. Owner supplied products.

D. Contractor use of sites.

E. Work sequence.

F. Owner occupancy.

1.2 DESCRIPTION OF WORK

A. Work on the Project will be provided under a single prime contract.

B. When completed, this project will provide the Owner with an expanded wastewater treatment facility, complying with the discharge permit issued to the Owner by the Illinois Environmental Protection Agency.

C. The major facilities or components of the Project include, but are not limited to the following (to determine the full scope of the Project, refer to the entire Contract Documents):
1. Roof Replacements on plant buildings
2. Battery A Control Building renovation
3. Battery B Raw Wastewater Pump Station improvements
4. Grit Removal equipment replacement
5. Aeration Basin modifications for biological nutrient removal
6. New Denitrification Basin construction
7. RAS/WAS Building modifications
8. Battery B Filter Building additions
9. Biosolids Drying Building / Storage Silos
10. Sludge Storage / Fermentation Tank modifications
11. Sludge Dewatering Building modifications
12. Emergency Power Generator addition
13. Influent Junction Box renovation
14. Miscellaneous equipment replacements
15. SCADA system / Instrumentation and control work
16. Heating, ventilating and air conditioning (HVAC) work
17. Electrical work
18. Site work / repaving of plant roadways
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19. Yard piping work
20. Selected demolition of existing facilities
21. Miscellaneous work

D. Any part or item of the work that is reasonable implied or normally required to make each installation satisfactorily operable shall be performed by the Contractor and the expense thereof shall be included in the applicable prices bid for the work. It is the intent of these Specifications to provide the Owner with complete operable systems, subsystems, and other items of work. All miscellaneous appurtenances and other items of work that are incidental to meeting the intent of these Specifications shall be considered as having been included in the applicable prices bid for the work even though these appurtenances and items may not be specifically called for in the Specifications.

1.3 WORK BY OWNER

A. Only items noted “By Owner”, “Not In Contract”, or “By Others” will be provided by Owner.

B. Owner’s Responsibilities for Work by Owner:
1. Arrange for and deliver Owner-reviewed Shop Drawings, Product Data, and Samples, to Contractor.
2. Arrange and pay for delivery to site.
3. On delivery, inspect products jointly with Contractor.
4. Submit claims for transportation damage and replace damaged, defective, or deficient items.
5. Arrange for manufacturers’ warranties, inspections, and service.

C. Contractor’s Responsibilities:
1. Review Owner-reviewed Shop Drawings, Product Data, and Samples.
2. Receive and unload products at site; inspect for completeness or damage jointly with Owner.
3. Handle, store, install and finish products.
4. Repair or replace items damaged after receipt.

D. Products furnished to site and installed by Owner:
1. “Provided by Owner”.

E. Items furnished by Owner for installation by Contractor:
1. “Owner-furnished, contractor-installed”.

F. Work by Other Contractors:
1. “By Others”.

1.4 CONTRACTOR USE OF SITES

A. Confine operations at sites to areas permitted by:
1. Law.
2. Ordinances.
3. Permits.
4. Contract Documents.
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B. Owner will occupy the existing treatment plant site and maintain treatment plant operations. Contractor shall coordinate construction operations to allow Owner continued operation of existing treatment plant.

C. Assume full responsibility for protection and safekeeping of material and products stored on or off premises.

D. Move any stored material or products that interfere with operations of Owner or other Contractors.

E. Obtain and pay for use of additional storage or work areas needed for operation.

F. Time Restrictions for Performing Work: During normal weekday working hours; 7:00 AM to 5:00 PM.

G. No work shall be done between 5:00 P.M. and 7:00 A.M. nor on Sundays or legal holidays without the written permission of the Owner. However, emergency work during these hours may be done without prior permission.

H. All power outages shall be scheduled and coordinated with the Owner to minimize or avoid interruptions to plant operations.

I. Night work may be established by the Contractor as regular procedure with the written permission of the Owner and at no additional cost to the Owner. Such permission, however, may be revoked at any time by the Owner if the Contractor fails to maintain adequate equipment and supervision for the proper execution and control of the work at night. Contractor shall provide adequate staff to respond to problems arising from the work at night. Contractor shall provide repairs as necessary to maintain plant operations. If the Contractor fails to respond in a manner deemed adequate to the Owner, the Owner reserves the right to make emergency repairs to maintain critical operations. The Owner will bill the Contractor for all labor and materials needed to affect such repairs.

1.5 WORK SEQUENCE

A. Due to potential health hazards and requirements of the State of Illinois, IEPA and U.S. EPA, existing wastewater treatment facilities must be maintained in operation during construction. Degree of treatment during  construction shall be equal to or exceed efficiency of facility before the start of construction. The Owner reserves the right to suspend the operations of the Contractor to maintain plant operations and degree of treatment should site conditions warrant the suspension.

B. The Contractor shall be fully responsible for providing all temporary piping, plumbing, electrical hook-ups, heating, ventilating, air conditioning, lighting, temporary structures, and related work to maintain wastewater treatment operations. All details of temporary piping and temporary construction are not necessarily shown on the Drawings or covered in the Specifications. However, this does not relieve the Contractor of the responsibility to maintain water treatment.

C. The Contractor shall provide a schedule and conduct the construction activities in such a manner as to allow the Owner's personnel to operate the facilities required for wastewater
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treatment.  The Contractor shall conduct operations in a manner necessary to minimize disturbance or disruption of wastewater treatment processes or operations.
1. The  Contractor’s  construction  schedule  for  the  Work  shall  generally  be  as follows:
a. Construct new treatment facilities and perform work in existing facilities in coordination with other work.
b. Construct yard piping, site utilities, and complete site work to make new facilities completely operational. Repaving work for the plant roadways shall commence after work on all facilities is substantially complete.
c. Specific facility restrictions that apply to all contractors:
1) Re-roofing of existing plant buildings may be commenced with at least 2 weeks of notice for each building and prior approved shop drawings for each building.
2) The Battery B raw wastewater pump station may be taken out of service between the hours of 8:00 p.m. and 6 a.m. Provide Owner with 7 days of notice prior to taking the facility out of service. The Contractor shall anticipate taking the pump station out of service for the following work:
a) One time for the installation of the temporary force main drainage piping, as shown on Drawing 20-M-1.
b) One time each for the installation of the three replacement knife gate valves.
c) Half of the pumping units may be taken out of service for up to 2 days for power distribution work in the building.
d) The entire building may be taken out of service for up to 2 hours during the night hours listed above for completion of power distribution work in the building.
3) The grit removal system may be taken out of service for a maximum of 10 days, with a minimum of 7 days advance notice. All new equipment must be available on site prior to taking the existing system out of service.
4) Aeration Tanks:
a) At least two of the three existing aeration tanks must be in service at all times.
b) Aeration tanks that have been cleaned shall not be available to receive flow while the grit removal system is out of service.
5) Return activated sludge pumping:
a) RAS pumping may be suspended for up to 12 hours, with a minimum of 7 days advance notice.
b) An empty aeration tank must be available to receive flow during the RAS shutdown.
6) Waste activated sludge pumping may be suspended for up to 12 hours, with a minimum of 7 days advance notice.
7) Prior to the biosolids dryer system startup and operation, one of the existing aerobic digesters may be taken out of service at a time, with a minimum of 7 days advance notice. Once the dryer system is fully operational, the two southernmost tanks may be
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taken out of service at the same time for the installation of the slide gate.
a) A single digester tank may be taken out of service for a maximum of 30 days (including 3 days for Owner emptying tank contents). Owner will determine the preferred sequential order. Note that the aerobic digester complex will remain in service throughout the duration of the construction until the dryer facilities are operational.
b) Owner will draw down the tank liquid level as specified in Section 01710 CLEANING, and then turn tank over to the Contractor. Contractor shall perform tank cleaning as specified.
c) While each digester tank is out of service, perform interior piping work associated with that digester inside the Pipe Gallery.
d) Construct modifications to digester tanks as shown.
e) Clean out any construction debris, then return the tank to service; coordinate the startup of each tank with the Owner.
8) Schedule the repair of the influent junction box and sewer piping, and installation of the temporary bypass pumping systems between September 15th and November 15th  The influent junction box may be shut down with a minimum of 7 days advance notice.
9) Removal of the slide gate from Sanitary Manhole 2 shall occur after the influent junction box has been placed back in service.
10) At least one of the two existing W3 pump systems must be in service at all times until the new W3 pumps are operational. Provide the Owner 7 days advance notice prior to removing a W3 pump system from service. The maximum time one W3 pump system may be removed from service before the new W3 pumps are operational is 30 days.
11) The new disc filters must be placed in the Filter Building between April 1st and October 15th. Either the north or south set of six sand filters must remain in service at all times. A set of six filters may be removed from service for a maximum of one month with at least one week notice. The total time a set of six sand filters are out of service may not exceed two months.
a) The Filter Building roof sections may be removed as shown on the Drawings and left open for a maximum of two weeks to install the disc filters. Provide the Owner at least one week notice prior to removing the roof section. Provide a temporary means of closing up the roof openings until the permanent roofing is installed.
12) The dechlorination system must remain in service between May 1st and October 31st. The system may be removed from service with at least one week notice.
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13) Two belt presses may be removed from service for a maximum of one month with a minimum of one week notice. The total time two belt presses are out of service may not exceed two months. All four existing belt presses may be shut down for a maximum of two days with a minimum of one week notice. The shaftless screw conveyors must be installed before dryer startup.


d. The general construction sequence for the construction should include the following constraints:
1) Deliver all materials and equipment to the site needed to refurbish the existing facilities before commencing work. All equipment shop drawings and O&M manuals shall have prior approval
2) RAS Denitrification Tank:
a) Complete modifications to the Aeration Tanks (Group
30) and the RAS/WAS building (Group 45) prior to the RAS Denitrification Tank startup.
b) Install and startup flow valve FV-7-2-3 on the inlet piping of Filtrate Storage Tank No. 1 (Group 80) before removing existing flow valve FV-4-3-1 in the RAS/WAS Building; this will allow sludge wasting to the aerobic digesters to continue after the work in the RAS/WAS Building is completed.
3) Remove W3 Pump System No. 1 and install the new W3 booster pumps before removing W3 Pump System No. 2.
4) Remove the existing east conveyors for Belt Press No. 1 and No. 2 in the Sludge Dewatering Building and install the new east conveyors before removing the west conveyors for Belt Press No. 3 and No. 4.
5) The thickened sludge transfer pumps in Structure 80 shall not be removed until all of the Structure 80 tanks have been cleaned; the pumps are needed to transfer sludge between tanks.
6) Startup of all equipment in the Sludge Storage/Fermentation Tanks shall occur after the dryer system has been placed into service.
7) Coordinate the installation and connection of the new emergency power generator (including the new manual transfer switch and new automatic transfer switch). Contractor shall schedule the work and make preparations to minimize the plant power outage; restrict the duration of the outage to a time period acceptable to the Owner.
8) Coordinate the installation and connection of the new control system components. Contractor shall schedule the work and make preparations to minimize any controls outages; restrict the duration of outages to a time period acceptable to the Owner. Contractor shall provide specific controls system components ready for startup in coordination with the timing of the new electrical power distribution. Schedule shall allow for the
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programming of the controls system. The Contractor shall perform a complete I/O and loop checkout for each control system component prior to software testing. After checkout the Contractor shall allow sufficient time for software testing prior to system startup. In generral, the Owner will require 2 weeks to allow for programming and software testing for each PLC after I/O checkout. Only one facility PLC may be taken out of service at any one time.
9) Complete facilities construction sufficiently for clear water testing as specified. Note that this will require completion of tie- ins of process piping to and from the existing plant, as well as electrical and control tie-ins. It is imperative that all related plant tie-ins be completed prior to wastewater startup. This will require completion of work in existing facilities prior to startup of      new facilities, as well as related sitework.
10) After completion of clear water testing as specified, start up the new facilities on wastewater as specified. Prepare a logical sequence of startup activities for review and approval at least 30 days prior to the proposed startup. Coordinate the activities of all manufacturers’ services as specified, including the scheduling of installation certifications and operators training. The Contractor shall maintain a startup calendar that provides ample advance notice to the Owner of manufacturer’s onsite activities.
11) Coordinate the sequence of facility startups with the Owner to allow for ongoing operation of facilities. The logic for sequencing facility startups shall recognize the interdependency between facilities.
12) After successful startup of an entire facility, the Owner will take over operation; Contractor will be allowed limited access to complete punch list work leading to final completion for that facility.

2. The general sequence of construction outlined is necessary to permit efficient use of the existing facilities during construction and to expedite construction and operation of the new facilities. The general sequence includes only the work to be performed on major facilities and structures, and work required to maintain adequate plant operations.
3. The outline presented herein is intended only to identify the relationships among various construction activities required to execute the construction while maintaining plant operations. The Owner will not be obligated to start up individual unit processes prior to completion of all facilities defined for a particular phase of construction. If deemed to be beneficial to the Owner, then checkout, clean water testing and startup may proceed for individual unit processes prior to completion of the construction phase, subject to the Owner’s approval.
4. The sequence of operations shall be conducted such that sufficient treatment facilities are in service to maintain plant operations throughout the duration of the construction.
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5. Where the outline does not attempt to define time requirements or durations for the completion of the individual tasks, the Contractor shall be responsible for establishing the schedule for construction as specified in Section 01323, NETWORK ANALYSIS SCHEDULES.
6. The Contractor may propose an alternate sequence of activities which allows the work to occur while maintaining treatment, should he desire to do so. Any alternate schedules and sequences shall be subject to review and approval by the Engineer prior to implementation by the Contractor.
7. Coordinate the modification and replacement of existing equipment and structures with the Owner. Do not take any existing equipment or structure out of service without prior notification to the Owner.

D. Coordinate, schedule and make final tie-ins of new connections to existing utilities, piping, and equipment. Coordinate the work and schedule with the utilities, allowing for ample advance notice to utilities. Tie-ins shall be scheduled by the Contractor to minimize interruption of plant operation. Contractor shall receive approval from the Owner and utility prior to taking any existing utility or piping out of service. Provide at least 24 hours advance notice to the Owner of all proposed connections to existing piping. Tie-ins will be required for, but not be limited to electric, gas and water utilities, sewage/sludge force mains and treatment plant effluent/W3 piping. Contractor shall be responsible for disconnecting the piping, draining liquid from the piping if necessary, and cleanup of the area. For gas piping, Contractor shall be responsible for testing and monitoring for safe working conditions, and shall purge the piping in a safe manner prior to putting the line back in service.

E. Schedule the completion of installation of all underground piping and conduits prior to commencing surface restoration in any area.

F. Schedule modifications to existing buildings to avoid or minimize disruptions to Owner’s ongoing operations and maintenance work. In general, modifications to existing buildings should be scheduled in the time periods described in this Section.

1.6 OWNER OCCUPANCY

A. The Owner will occupy the existing treatment plant site during entire period of construction to conduct normal operations.

B. Cooperate with Owner to minimize conflict, and to facilitate Owner's operations.

C. Schedule the Work to accommodate this requirement.

1.7 FIELD VERIFICATION OF DRAWING INFORMATION

A. The Contractor shall field verify the size and location of existing structures, equipment, and piping depicted on the Drawings. Information on the Drawings is based upon available plant record drawings. No attempt has been made to verify the accuracy of the record drawings. Contractor shall be responsible for locating all buried pipelines and utilities prior to excavation.
A.
1.8 ARCHAEOLOGICAL FINDS

A. Provide protection around known archeological features if shown on the Drawings. Protection shall remain in place until Final Completion.

B. Provide for the preservation and protection of materials of an archaeological nature should such materials be uncovered in the course of the Work.

C. Notify Engineer immediately upon discovery of such materials and stop work in the vicinity of the find.

D. All finds are the property of the Owner.   Do not remove or disturb finds without the Owner's written authorization.

1.9 OFFSITE SPOILS DISPOSAL

A. Excess spoils from excavations shall be disposed of offsite in accordance with all applicable laws and regulations.


PART 2 PRODUCTS

Not Used.


PART 3 EXECUTION


Not Used.


END OF SECTION