Project Specifications

Transcription

1 Project Specifications 2016 Work Description - Root remove, clean via hydro-jetting, perform pre-televising and install Cured In Place Pipe liner (CIPP) utilizing either an inverted or pulled in place method. Provide post installation television record upon successful lining. Liner must be installed the entire length from inspection clean out chamber to sewer main covering every pipe joint and must not protrude into the main. Material Specifications o See CIPP Specs included. Inspections o Prior to beginning any lining operations the City must approve the cleaning of the lateral. o Upon completion of lining operation the City must approve the post television record prior to acceptance and payment. o Video must be submitted in mpeg or avi format. Work Locations 636 Ann Pl. 805 Dingman St Fairmont Dr Fairmont Dr Fair Oaks Dr. 606 Maywood Pl. 612 Maywood Pl. 117 Stewart Dr. 317 Stewart Dr Willow Dr. Work Site Restoration o Work area must be left in a condition equal to or better than prior to commencement of work. Any damage to yards, driveways, curbs, sidewalks, etc. shall be the responsibility of the contractor to repair at their cost. Warranty o In addition to the 1-year maintenance bond required, a 10-year warranty for full material, workmanship, and labor shall be provided in writing to the City. Warranty will commence upon final acceptance of project. Prevailing Wages o Contractor is cautioned that any bid in excess of $26,514 requires prevailing wages to be paid at the current scale rates. Scheduling o See section 5.2 of CIPP Specs. Specifications 42

2 Coordination o Contractor shall provide a minimum of 24 hour advance written notice to each affected homeowner prior to beginning any work. Payment o Payment shall be made per linear foot of sanitary lateral pipe lined and shall include all work; cleaning, pre and post televising, by-pass pumping (if required), lining and site restoration Specifications 43

3 SPECIFICATIONS FOR CURED-IN-PLACE PIPE (CIPP) 1. GENERAL 1.1 SCOPE: A. The purpose of this specification is to describe work related to inspection and elimination of ground water infiltration via Cured In Place Pipe Lining of the service connection from the junction with the main sewer to the sanitary lateral inspection chamber. B. This bid item shall include all supervision, labor, equipment and materials to perform all work necessary to clean, pre and post inspect (with closed circuit television) and install either an inverted or pulled-inplace lining system. C. Qualified and experienced personnel utilizing equipment, in good working order, shall accomplish work and materials that meet the requirements hereinafter specified. D. The elimination of ground water infiltration as used in this Specification shall mean the elimination of infiltration of soil and water indicated by inspection via closed circuit television. 2. REFERENCED DOCUMENTS 2.1 This specification references standards from the American Society for Testing and Materials, such as: ASTM F 1216 (Rehabilitation of Existing Pipelines and Conduits by the Inversion and Curing of a Resin-Impregnated Tube), ASTM F 1743 (Rehabilitation of Existing Pipelines and Conduits by Pulled-in-Place Installation of Cured-in-Place Thermosetting Resin Pipe (CIPP)), ASTM DS813 (Cured-in-Place Thermosetting Resin Sewer Pipe), ASTM D790 (Test Methods for Flexural Properties of Un-reinforced and Reinforced Plastics and Electrical Insulating Materials), and D2990 (Tensile, Compressive, and Flexural Creep and Creep-Rupture of Plastics) which are made a part hereof by such reference and shall be the latest edition and revision thereof. In case of conflicting requirements between this specification and these referenced documents, this specification will govern. 3. PRODUCT, MANUFACTURER/INSTALLER OUALIFICATION REOUIREMENTS 3.1 EQUIPMENT A. LOW PRESSURE HYDRAULIC CLEANING EQUIPMENT: Two types of low pressure cleaning equipment shall be acceptable: 1. The movable dam type: Movable dam shall be of equal diameter to the pipe being cleaned and shall provide a flexible scraper around the outer periphery to ensure the total removal of debris and grease. 2. The inflatable element or balling type: Balling type equipment shall be inflated so that a tight contact is made with the pipe wall to restrict the movement of water around the ball and to assure the removal of all debris from the invert of the pipe as well as grease from the pipe wall. Specifications 44

4 B HIGH-VELOCITY HYDRAULIC CLEANING EQUIPMENT: Equipment shall be fitted with a minimum of 500 If of high pressure hose. High-pressure hose shall have a maximum ID of 1-inch with a selection of two or more cleaning nozzles. Nozzles shall be capable of producing a scouring action from 15 to 45 in all line sizes to be cleaned. Minimum working capability of the cleaning system shall be 1000-psi. System shall be equipped with high-velocity gun for washing and scouring manhole walls and floors. C. MECHANICAL CLEANING EQUIPMENT: Bucket machines shall be operated in pairs with each machine powered by an engine with enough horsepower to ensure sufficient pulling power. Power rodding machines shall be of a continuous rod-type capable of holding a minimum of 500-lf of rod. The machine shall have a positive rod drive to produce 2,000 pounds of rod pull. Machine shall be outfitted for safe operation and in accordance with current regulations and laws. 4. MATERIALS 4.1 Tube - The sewn Tube shall consist of one or more layers of absorbent non-woven felt fabric and meet the requirements of ASTM F1216, Section 5.1 or ASTM F 1743, Section or ASTM D 58l3, Sections 5 and 6. The tube shall be constructed to withstand installation pressures, have sufficient strength to bridge missing pipe, and stretch to fit irregular pipe sections The wet out Tube shall have a relatively uniform thickness that when compressed at installation pressures will equal or exceed the calculated minimum design CIPP wall thickness The Tube shall be manufactured to a size that when installed will tightly fit the internal circumference and length of the original pipe. Allowance should be made for circumferential stretching during installation The outside layer of the Tube shall be coated with an impermeable, flexible membrane that will contain the resin and allow the resin impregnation (wet out) procedure to be monitored The Tube shall contain no intermediate or encapsulated elastomeric layers. No material shall be included in the Tube that may cause delamination in the cured CIPP. No dry or unsaturated layers shall be evident The wall color of the interior pipe surface of CIPP after installation shall be a relatively light reflective color so that a clear detailed examination with closed circuit television inspection equipment may be made Seams in the Tube shall be stronger than the non-seamed felt material The Tube shall be marked for distance at regular intervals along its entire length, not to exceed 5 ft. Such markings shall include the Manufacturers name or identifying symbol. The tubes must be manufactured in the USA The layers of the cured CIPP shall be uniformly bonded. It shall not be possible to separate any two layers with a probe or point of a knife blade so that the layers separate cleanly or the probe or knife blade moves freely between the layers. If the layers separate during field sample testing new Specifications 45

5 samples will be required to be obtained from the installed pipe. Any reoccurrence may cause rejection of the work. 4.2 Resin - The resin system shall be a corrosion resistant polyester or vinyl ester system including all required catalysts, initiators that when cured within the tube create a composite that satisfies the requirements of ASTM F1216, ASTM D5813 and ASTM F1743, the physical properties herein, and those which are to be utilized in the submitted and approved design of the CIPP for this project. The resin shall produce a CIPP that will comply with the structural and chemical resistance requirements of this specification. 5. EXECUTION 5.1 GENERAL: A. Contractor shall ensure all work can be accomplished from above ground and ensure traffic control is adequate to ensure safety of the public and work crews. B. All preparations shall be completed to the Engineer's satisfaction prior to proceeding with lining. C. Contractor shall ensure that no other work is simultaneously in progress upstream or downstream of his operation which may adversely affect the successful completion of this work. D. The Contractor, when required, shall provide for the flow of sewage around the section or sections of pipe designated for repair. Plugging the line at an existing upstream location and pumping the flow into a downstream manhole or adjacent system shall make the bypass. The pump(s) and bypass line(s) shall be of adequate capacity to accommodate the sewage flow. The Owner may require a detail of the bypass plan to be submitted. 5.2 SCHEDULING: A. Contractor shall make every effort to maintain sewer service usage throughout the duration of the project. In the event that a connection will be out of service, the longest period of no service shall be 8 hours and service shall be restored by 8:00PM at the latest. B. Property owners of service laterals shall be notified in writing, 48-hours in advance, of any service interruption. Written notice shall be posted on the main entrance door by a door hanger. The notice shall include the following items: 1 Day and date of service interruption. 2 Estimated time duration, in hours, that service will be shut off. 3 Resident is prohibited from discharging any wastewater during the noticed shutoff. C. A written record of these notifications shall be maintained by the Contractor and submitted to the Engineer prior to service shut off. Specifications 46

6 5.3 SEWER CLEANING AND CLEARING: A. Sewer shall be cleared of all obstructions such as solids, roots, grease and like debris. "Clean" as used in this Specification shall be defined as the removal of sufficient materials to render the sewer line to 95% of its original capacity and allow passage of inspections, testing and sealing equipment. B. Contractor shall remove all accumulations of debris to ensure that cracks and breaks can be observed during TV inspection and sealing equipment can successfully isolate joints during testing and/or sealing procedures. C. Contractor shall ensure cleaning processes do not harm connected system and adjoining structures and property. 3 D. All sewer manhole sections shall be cleaned using mechanically powered, hydraulic propelled or highvelocity sewer cleaning equipment as specified. Selection of equipment used shall be based on the condition of the lines at the time the work commences. Equipment and methods selected for cleaning shall be capable of removing all dirt, grease, rocks and other deleterious materials from the sewer lines and manholes. E. If pre-installation inspection reveals an obstruction such as a protruding service connection, dropped joint or a collapse that will prevent the installation process and cannot be removed by conventional sewer cleaning equipment, then the Contractor shall note in writing the location of the obstruction and report it to the City Inspector. F. When lines to be cleaned show evidence of being more than half filled with solids, bucket machines and rodding machines shall be utilized to remove the major portion of the debris before hydraulic equipment is used to complete cleaning operations. Contractor shall also be required to provide and utilize bucket machines and rodding machines in instances to facilitate the removal of roots and heavy grease. G. Whenever hydraulically propelled cleaning tools which depend on water pressure to provide cleaning force and any tool which retards the flow of water in the sewer system are used, the Contractor shall ensure that water pressure created does not cause any damage or flooding to the public or private property being serviced within the system. H. No City fire hydrant shall be used without the express permission of the Engineer and only after city crews have installed proper backflow prevention equipment. I. All solids or semisolids resulting from the cleaning operation shall be removed from the work site and disposed of in a manner and at a site approved by the Engineer. J. The Engineer upon completion and review of the pre inspection shall do final acceptance of the cleaning operation. Specifications 47

7 5.4 INSTALLATION A. CIPP installation shall be in accordance with ASTM F1216, Section 7, or ASTM F1743, Section 6. B. The quantity of resin used for tube impregnation shall be sufficient to fill the volume of air voids in the tube with additional allowances for polymerization shrinkage and the potential loss of resin during installation through cracks and irregularities in the original pipe wall, as applicable. C. Inspection of pipelines shall be performed by experienced personnel trained in locating breaks, obstacles and service connections using close circuit television (CCTV) inspection techniques. The pipeline interior shall be carefully inspected to determine the location of any conditions that may prevent proper installation of CIPP. These shall be noted and corrected. Video and suitable written log for each line section shall be produced for later reference by the Owner. 5.5 INSPECTION/TESTING A. CIPP samples shall be prepared for each installation designated by the owner/engineer or approximately 20% of the project's installations. Pipe physical properties will be tested in accordance with ASTM F1216 or ASTM F1743, Section 8. B. Visual inspection of the CIPP shall be in accordance with ASTM F1743, Section 8.6. C. Each lateral connection shall be isolated by inflated bladders, expanded securely against pipe walls in the mainline. The service line bladder shall extend into the service lateral a minimum of 1ft beyond the repair. D. Provide a DVD format to Engineer of all repairs with distances, address of repair & date clearly shown. 5.6 CLEAN-UP A. Upon acceptance of the installation work and testing, the Contractor shall restore the project area affected by the operations to a condition at least equal to that existing prior to the work. 6. PAYMENT A. Payment for the work included in this section will be in accordance with the prices set forth in the proposal for the quantity of work performed. B. All costs for collection and analysis of test samples shall be borne by the Contractor and shall be considered incidental to the other items of work in this project. C. Payment shall be made per foot of sanitary sewer pipe cured in-place and shall include all work; grouting, cleaning, inspection and testing for line item sanitary sewer pipe cured in-place. Item Special, Slip line 4-inch sanitary sewer lateral, as per plan, feet. Item Special, Slip line 6-inch sanitary sewer lateral, as per plan, feet. Specifications 48