SEWER SYSTEM UPGRADE_SOW.pdf

CIM-0900-30F-48-0908-03

SOUTHERN ILLINOIS COOPERATIVE DISPATCH CENTER IMPROVEMENTS, SEWER SYSTEM UPGRADE

Crab Orchard Natural Wild Life Refuge Marion, Illinois

Williamson County, Illinois

1. GENERAL SCOPE

The project will remove existing sewage holding tank and replace with new Aerobic Treatment Unit. The work includes but is not limited to: Design and Construction of an Aerobic Treatment Plant. The contractor shall provide all labor, equipment and materials necessary to perform the design and construct a complete and operational

Aerobic Treatment Unit, as described herein and to meet the operational requirements of the Inter-Agency Fire

Dispatch Center.

1.2 The Contractor shall be responsible for the professional quality, technical accuracy and coordination of all designs, drawings, specifications and other documents or publications upon which construction is based.

All submitted design documents shall be reviewed and approved by the Contracting Officer (CO) before construction takes place.

2. GENERAL REQUIREMENTS

2.1 The design requirements within this Section represent the minimum requirements for installation of Aerobic

Treatment Unit septic system to support a maximum of 25 employees assigned to the Inter-Agency Fire Dispatch center. The plant shall consist of a fiberglass aeration tank, air diffusion with blower assembly, with inner circular type conical clarifier. The treatment plant’s main tank shall be constructed of ¼ inch minimum thickness fiberglass. A pre-treatment tank shall be provided to receive the incoming flow. The aeration tank shall be sized to provide a minimum of 24 hour hydraulic detention time at the average daily flow (ADF). The clarifier shall be designed so as to provide optimum liquid-solid separation and shall be sized to provide eight hours hydraulic detention at the average daily flow ADF rate. The clarifier shall be installed inside the main tank. An in-line chlorinator shall be included in the treatment system to achieve disinfection by chlorination of the final effluent.

The effluent from the treatment plant shall gravity flow through a tablet type chlorinator tank; Air diffusion drop pipes of ¾” inch schedule 40 PVC pipe shall supply air to diffusers. Electrical connections to the breaker box and control panel shall be furnished with each compressor that will protect the compressor from overload and failure to start. Included in the panel shall be a pressure switch alarm system that will sound an alarm upon loss of air supply as well as a high water alarm. A buried sand filter sized with a surface area equal to 2 gallons per square foot per day and dosed at least once but not more than 4 times per day shall immediately follow the aerobic treatment plant.

All submitted design documents shall be reviewed and approved by the Contracting Officer (CO) before construction takes place.

2.2 The Inter-Agency Fire Dispatch Center, located on the Crab Orchard Natural Wildlife Refuge Marion Illinois, is a one-story, 4,992 square foot facility.

2.3 Equipments, Materials, Products and Supplies. All Aerobic Treatment Unit sewer system appurtenances and supplies shall be newly manufactured of the latest version unless otherwise specified herein. All supplies and replacement parts shall be standard and readily available through commercial means.

2.4 Codes and Standards. The design, materials, equipment, and installation shall be in accordance with the requirements of the listed codes. All references used shall be the latest edition. The listed references may not be all inclusive, and it is the Contractor’s responsibility to meet all codes. The Work shall be performed in compliance with the latest editions of the following codes: International Mechanical Code, National Electrical

Code, International Building Code and International Plumbing Code.

2.5 Field Information. The Contractor shall be responsible for obtaining all permits. All information necessary to design and install all work as well as any survey or measurements required to identify utility locations; verification of existing features, and any damage to existing utility lines shall be the responsibility of the Contractor. System shall be designed to support a maximum of 25 employees.

2.6 Waste Disposal. Project demolition and construction waste shall become the property of the contractor and shall be disposed of off site in a legal manner in accordance with State of Illinois waste regulations. Proof of disposal shall be provided prior to any payment being made.

2.7 Warranty. Construction warranty shall be provided by the Contractor for a minimum of one year, or the industry standard (whichever is longer), from the date of final acceptance.

2.8 Testing. The new sanitary sewer septic system shall be tested to verify each system is properly installed and fully operational. Contractor shall notify the COR (Contracting Officer’s Representative) a minimum of 48 hours in advance prior to switch over to newly constructed Aerobic Treatment Unit.

3. DESIGN SUBMITTAL REQUIREMENTS

3.1 Drawings. The Contractor shall prepare and submit schematic drawings, provide information on layout of new

Aerobic Treatment Unit. Submit five (5) half-size sets. Provide calculations, and product data.

3.2 Product Data/Shop Drawings. Provide manufacturers’ information in the form of their standard catalog data complete with pictorial information and supporting technical data. Submit five (5) copies for each item for the

Aerobic Treatment Unit septic system.

3.3 Record Drawings. At project completion, submit two (2) half-size paper sets of as-built drawings indicating the sanitary sewer septic system installed. Record changes to drawings during construction. As-built drawings record the locations, sizes, and nature of concealed items such as, sewer lines, valves, etc. These records (with dimensions) form a permanent record for future reference. Government shall review and approve drawings and may require that they be resubmitted if there are errors or omissions.

4. MECHANICAL/PLUMBING DESIGN AND MATERIALS

4.1 General. Project includes the design and construction of an Aerobic Treatment Unit and the removal of existing holding tank and associated piping and leach field.

4.2 Existing Conditions. Existing sanitary sewer system discharges into a 1500 gal. Holding tank.

The existing sewer connection line is assumed to be 4 inch diameter.

4.3 Submittals. Contractor shall submit the following within 2 weeks of after issuance of Notice to Proceed:

Drawings: Submit schematic drawings as required by design including, but not limited to: piping plans, piping diagrams, electrical schematic, controls, alarm panels, sand filter, and demolition plans if required.

Calculations: Submit all calculations performed as may be necessary to adequately design and install the project Aerobic Treatment Unit sanitary septic service, including but not limited to sanitary sewer piping and all electrical controls and connections.

Product Data. Submit Product Data and Shop Drawings for all materials, products, systems, and equipment required including but not limited to mechanical items and incidental items of materials used in Aerobic Treatment

Unit septic system construction. Submit Commissioning Reports, Piping Leak Test Reports, Anti-siphon

Certification Report, and Operational Test Reports.

5. MECHANICAL/PLUMBING INSTALLATION

5.1 Trenches. Trenches shall be of sufficient width to provide free working space on each side of the tank and pipes and to permit proper backfilling around the tank and pipes but unless specifically authorized by the

Contracting Officer (CO), trenches shall in no case be excavated or permitted to become wider than one foot six inches (1’ 6”) . Provide complete and fully functional Aerobic Treatment Unit septic system to support the Inter-

Agency Fire Dispatch Center. Notify the COR a minimum of 48 hours in advance of testing and switch over.

Existing Sanitary Septic/Holding tank shall be pumped and removed to include all piping and leach field, backfilled and top dress. The contractor shall reconstruct same to the original lines and grades and in such manner as to leave all such surfaces in fully as good or better condition than that which existed prior to his operations. The re-use of materials removed in making excavations will be permitted and in the manner described. No soil shall be removed from the site. Before the contractor backfills any of the lines, they shall be first inspected and approved in writing by COR (Contracting Officer’s Representative). If any joints, pipes, or other workmanship of materials are found to be defective, they shall be removed and replaced by the contractor at his expense. All components of the

Aerobic Treatment Unit septic service, including fittings, services, connections, and valves shall be installed in compliance with the International Plumbing Code and shall be hydrostatic tested. All underground pipes shall have metallic tape laid a minimum of 12” below the surface. This tape shall be green in color and have the words

“CAUTION SANITARYSEWER” printed on it.

5.2 Excavations.

Contractor shall be responsible all permits and for repairing all damage caused by their equipment operation.

Disturbed areas shall be repaired by grading smooth, planting a commercial lawn mix and mulching.

5.3 Close Out.

Demonstrate System, review maintenance requirements. Provide Operations and Maintenance Manuals.