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.
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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
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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.
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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
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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
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