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HomeMy WebLinkAboutCC AG PKT 2004-01-26 #O AGENDA REPORT DATE: January 26, 2004 TO: Honorable Mayor and City Council THRU: John B. Bahorski, City Manager FROM: Douglas A. Dancs, Director of Public Works/City Engineer SUBJECT: RECEIVE AND FILE: SPECIFICATIONS FOR SEWER CLEANING SUMMARY OF REQUEST: Receive and File. BACKGROUND: The Department of Public Works contracts for the cleaning of its sewer lines. On a regular basis, specifications for certain work should be updated and contracts should be re- advertised. These updated specification are based upon those used by Orange County Sanitation District. Proper methods regarding cleaning of the sewer system are a component of the City's preventative maintenance program required by the April 2002 Order No. R8- 2002 -0014, General Waste Discharge Requirements for Sewer Collection Agencies, Section (iv) Measures and Activities issued by the California Regional Water Quality Control Board, Santa Ana Region. Properly maintained sewer will decrease potential Sanitary Sewer Overflows (SSO) which affect the water quality of the coastline. This spring, after the proposal process is completed, a new contract for sewer cleaning will be brought forward to City Council for approval. Within the last 2 years, all the sewer lines within the City have been cleaned. FISCAL IMPACT: Funding is available within the Sewer Operating Fund (034) within the Contract Professional Services Account (44000) for this work. RECOMMENDATION: Receive and File. Agenda Item 19 Submitted : ,.° Dougla "" ancsl�Director Public Works Department NOTE ►, ' , $ ' D J A John B7: • 4 rs City Manager Attachm ts: Exhibit "A "— Sewer Cleaning Specifications Agenda Item Exhibit "A" — Sewer Cleaning Specifications Agenda Item SCOPE OF WORK SEWER LINE CLEANING FOR CITY OF SEAL BEACH Specification No. A. Background — The City of Seal Beach provides sewer service to the northeast and - southwest sections of Seal Beach and the Sunset Aquatic Park. The areas of Leisure World, College Park West, and Surfside are within the City's limits but are currently not served by the City. Estimated population in the sewer service area is 15,751. Existing average wastewater flow generated within the City's service areas is 1.54 million gallons per day. B. General — Service Provider will furnish all labor, materials, equipment, and incidentals necessary for the cleaning of approximately 155,000 ± feet of sewer lines and manholes described herein. The Service Provider shall be responsible for the removal of debris from the pipeline and shall take all the necessary steps to ensure that no spills of any water occur. Pipeline debris is described as, but not limited to, sludge, dirt, sand, rocks, grease, roots, and other solid or semisolid materials. The sewers in this contract area were all cleaned within the past two years by the City of Seal Beach. Sewer lines are VCP, DIP, and PVC and range in sizes from 6 to 24 inches in diameter. Lengths shown are approximate. Payment will be for actual footage cleaned. Work crews shall be on site from 7:00 a.m. to 3:30 p.m., Monday through Thursday. All sewers shall be cleaned every twelve (12) months. C. Cleaning Equipment Combination of high velocity hydro - cleaning and vacuum removal equipment shall be utilized and shall have the following features as a minimum: 1. A minimum of 900 feet of 1 -inch diameter high - pressure hydro.flushing hose. 2. Two or more high velocity nozzles capable of producing a scouring action from 15 degrees to 45 degrees in all size lines to be cleaned. Nozzle skids shall be used for the appropriate size of pipe being cleaned. Note: Nozzle jet orifices shall be inspected periodically by the Service Provider and City of Seal Beach representative to ensure jet diameter does not exceed 0.0860 -inch in diameter. Nozzle jets will be considered worn if a 3/30" drill bit can be inserted into the jet orifice. The nozzle shall then be removed from service. For nozzles with replaceable jets, the oversize jets shall be replaced before the nozzle can be used again. 1 3. At least one root cutter attachment for 6" through 15" pipe. 4. A high - pressure handgun for washing and scouring manhole walls, channels, shelves, and manhole cover frames. 5. A 1,500 -gallon minimum water tank, pump, and a hydraulically driven hose reel. 6. Equipment operational controls located above ground. 7. Minimum working pressure of 1,200 pounds per square inch at 60 G.P.M. rate. 8. Centrifugal or positive displacement blower vacuum equipment suitable to remove all debris at the downstream manhole while the hydro flushing is being performed. 9. Two (2) two -way hand -held radios for communication and a Nextel phone with walkie /talkie feature for communication with City. D. Cleaning Precautions — During sewer cleaning operations, satisfactory precautions shall be taken in the use of cleaning equipment to ensure that the water pressure or head created does not damage or cause flooding of public or private property being served by the sewer. Care shall be exercised in the selection and use of the cleaning tools to avoid pipe damage. Service Provider shall be responsible for all costs for repairs and /or clean up to City -owned or private property to City's satisfaction. Use of a nozzle skid is required to prevent accidental entry of nozzle into house connections. E. Sewer Cleaning Procedures — The designated sewer line segments will be cleaned using combination high - velocity jet with vacuum removal. The normal cleaning operation shall be to jet from the downstream manhole towards the upstream manhole thereby pulling any debris back to the downstream manhole. If no debris is present then a single pass shall be sufficient. If debris is encountered the entire run shall be made repeatedly until debris is no longer present.' At any sign of significant dirt and gravel the cleaning operation for that pipe shall cease and City shall be notified of a possible line break. Once the appropriate traffic control has been placed, the Service Provider shall wash the upstream manhole with the high - pressure water gun while being cautious not to spray any surrounding vehicles or pedestrians. Any major defects in the manhole or the frame and • cover shall be noted and brought to the attention of the City for remedy. Selection of the equipment used will be based on the conditions of the sewer lines at the time work commences. The equipment and methods selected must be satisfactory to City's representative(s). The equipment shall be capable of removing dirt, grease, roots and other materials and obstructions from the sewer lines and manholes. If cleaning of an entire section cannot be successfully performed from the downstream manhole, the equipment will be set up on the upstream manhole and cleaning will again be attempted. If successful cleaning again cannot be performed or the equipment fails to traverse the entire manhole section, it will be assumed that a major blockage exists and the Service Provider will notify City's representative(s) of this condition immediately for further instructions. Pullback rate on jetting shall not be greater than three feet per second. The cleaning method shall be to jet from the upstream manhole down slope for washing purposes on pipeline segments with extremely steep slopes where the jetter nozzle fails to • climb to the upstream manhole. Then to jet from the downstream manhole upslope so 2 that the cleaning directions overlap. Water for cleaning will be from the closest available fire hydrant. The Service Provider shall make arrangements with the local water agency to get water from the local fire hydrant. If there are any questions regarding previous cleaning data, they should be directed to Jeff Watson, Maintenance Services Manager at (562) 493 -8660. F. Material Removed — The Service Provider shall be responsible for the removal of debris from the pipeline and cleaning and /or re- cleaning the pipe wall to City's satisfaction as proven by the closed circuit television (CCTV) video. All sludge, dirt, sand, rocks, roots, grease and other solid or semisolid material resulting from the cleaning operation shall be removed at the downstream manhole of the section being cleaned. Passing material from manhole section to manhole section, which may cause line stoppages, shall not be permitted. G. Material Disposal — Liquids shall be decanted and rained back to the sewer. All solids or semisolid resulting from the cleaning operations will be removed from the work site and disposed of at no added cost to the Service Provider in the Digester cleaning beds at OCSD's Treatment Plant No. 2 located in Huntington Beach, California. All materials will be removed from the work site at the end of each workday. Under no circumstances will the Service Provider be allowed to accumulate debris, etc. on the site of work beyond a single workday. H. Spill Reporting and Handling — Service Provider shall immediately notify City's representative(s) of any manhole overflow or interruption/backup of customer service. The Service Provider shall take all measures possible to immediately contain and control all overflow. The City of Seal Beach Sanitary Sewer Overflow Emergency Response Plan is available for review at City Hall (211 8 Street) and at the City Public Works Yard (1776 Adolfo Lopez Drive). Service Provider shall be responsible for any fines levied by others as a result of the Service Provider's work. Ultimately, if the Service Provider is involved with a spill, he must: 1. First and immediately notify the City of Seal Beach at (562) 493 -8660 or (562) 431- 2527. The City will then make the notifications required by OCSD. Once a spill is reported to the City of Seal Beach, personnel will be dispatched to assist the Service Provider. 2. Secondly, the Service Provider must attempt to contain the spill to isolate it from entry to any waterways. 3. Thirdly, the Service Provider must attempt to relieve the spill. Once the spill has been contained and relieved, the area must be cleaned up. 4. Lastly, follow -up reports must be made. Service Provider shall be responsible for any fines levied by others, reimbursement of any agency incurred costs, damage, cleanup, restoration of flow, and any disruption of service costs to customers as a result of Service Provider's work. The customer in addition to any and all costs incurs this. 3 Service Provider shall also notify the City of Seal Beach immediately of any apparent non - Service Provider related spills and/or any abnormal conditions. Confined Space Issues and Safety Issues — All manholes in this work are defined as Title 8 Permit Required Confined Spaces. The Service Provider's attention is directed to the General Industry Safety Orders of the State of California, Article 108, Confined Spaces, Section 5157 (Title 8 of California Code of Regulations, Sections 5167, 5157, 5158). Service Provider shall attend a safety meeting at OCSD with the Safety and Emergency Response Division prior to the award for the purpose of reviewing the Service Providers safety manuals, his knowledge of Title 8, and to discuss all safety aspects of the job. All work shall be conducted from above ground. Manhole entry, if required, shall be conducted in strict accordance with permit- required confined space entry regulations. These regulations include, at a minimum: entry permit, trained authorized entrant(s), attendant(s), entry supervisor(s), full body harness (with life line), mechanical retrieval device, continued force air ventilation, continuous air monitoring, communication system (minimum two types), and all other protective equipment that may be required. Work shall be conducted in accordance with all Federal, State, and local laws and regulations. The local Fire Department may be able to offer services for Confined Space Rescue. Service Provider shall make any and all arrangements necessary at no additional costs to the City of Seal Beach. J. Traffic Control — All traffic control shall be in accordance with the latest CALTRANS regulations and the WATCH (Work Area Traffic Control Handbook), latest edition, and based on the speed limits posted in the work zones. Flagmen may be required in some locations. Additional local regulations shall have precedence. Service Provider shall apply for all traffic control permits and pay all fees and permits for said permits. Safe and adequate pedestrian and vehicular access shall be provided in accordance with Section 7 -10 of the Standard Specifications for Public Works Construction, 2000 Edition. NOTE: Inadequate or improper signing and delineation for traffic control- may be cause for the cancellation of the contract. K. Work Plan — The Service Provider shall prepare a weekly work plan and submit it one (1) week in advance to the City representative, Alan Bramlett, for review and approval at (562) 493 -8660, ext. 409. The plan shall verify the cleaning sequence and identify all the line sections to be cleaned based on City maps and sequence data provided. Plan may be amended for weather or local road maintenance or construction issues discovered by either party. L. Work Documentation — Weekly reports based on the work plan shall be submitted for City review with the invoice for payment. Service Provider's log sheets, with a section -by- section breakdown, including comments, shall be 4 maintained on site, in a legible manner, for review at all times. Comments on log sheets shall include notice of badly worn frames and covers and of badly deteriorated manhole concrete structures. M. Crew Size — Service Provider shall provide a minimum of a two- person crew at all times, and one person shall witness the jetting nozzle reach the upstream manhole. A crew of three shall be utilized for all work in confined spaces. Additional personnel shall be utilized when needed for traffic control flagmen. NOTES: • All manhole numbers used in the inspection report and all data files will be provided by the City. • The Inspection Report for each segment shall contain the following as directed by the City: 1. Agency project or Contract number 2. Date 3. Time 4. Weather condition 5. Service Provider name 6. Service Provider job number 7. Operator(s) name 8. Street name or location 9. Cross street name or location 10. Manhole number (access point) — up stream 11. Manhole number (access point) — down stream 12. Manhole to manhole segment number 13. Pipe — size 14. Pipe — slope 15. Notice of severely worn manhole covers 16. Notice of severely deteriorated manhole concrete structures 17. Notice of severely deteriorated manhole liners or coatings 5