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TERMS OF REFERENCE
TRANSFER STATION DESIGN
[], []
GENERAL
The transfer station facilities to be sited and designed are proposed to be part of the [] Urban
Environmental Sanitation Project planned to be financed by the World Bank.
The stations would be located strategically within [].
The design of facilities (including all related civil works and essential stationary equipment) for transfer
of municipal solid waste shall handle an approximately one-fourth of []'s projected peak seasonal solid
waste load for the year 2010 and the number of associated collection trucks.
For design purposes, it is to be assumed that half each day's volume of collection trucks is
expected to arrive at each station during peak unloading period of one hour's duration in the morning.
Similarly, the other half of the collection trucks is expected to arrive at the station at a second peak
unloading period of one hour's duration in the afternoon. All traffic control, unloading stations, and
loading equipment shall be able to handle the design peak loads in a steady flow without queuing within
the station boundaries, or along its adjacent roadways.
Transfer Building floors and ramps and entrance weighbridge facilities shall be designed to
accommodate anticipated GVWR loads of up to 25 tonnes per collection truck. Access roads, exit
weighbridge facilities, on-site roads, ramps and parking shall be designed to accommodate GVWR loads
of up to 60 tonnes per transfer truck. Transfer vehicles (including truck tractors and trailers) shall be
designed to operate in accordance with [] highway design standards for GVWR and no excess capacity
shall be provided on the vehicle which might lead to overloading.
OBJECTIVES
The consultants shall adequately address the following objectives within their engineering
analysis and designs:
 safe and efficient flow of traffic for collection and transfer trucks into and out of, as well as
within, the facility.
 safe and efficient unloading of collection trucks and loading of transfer trucks.
 adequate storage capacity of solid waste to enable accommodation of peak periods of
unloading by collection trucks and desirable periods for loading of transfer trucks (e.g., one
day of storage capacity in a pit is typically considered appropriate).
 adequate enclosure and ventilation for control of noise, odor and dust and to meet aesthetic
needs compatible with the surrounding environs.
 accommodations for workers to change clothing, wash, eat and rest.
 office facilities for site supervisors and support staff, as well as for training and meetings.
 fencing and gate control facilities, including weighbridges, to secure the site and enable
performance monitoring of all incoming and outgoing collection vehicles and outgoing
transfer vehicles.
 drainage and sanitation facilities to fully meet the projected flow of a 20 year storm.
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parking space for the fleet of transfer trucks which will serve the facility, unless space is
unavailable and provisions for making space can be otherwise arranged at the sanitary
landfills.
workshop bays, facilities, and equipment to meet the repair and maintenance needs of the
fleet of transfer trucks.
washing facilities and washwater recycling facilities for the fleet of transfer trucks.
design of the facilities so that they will have a minimum life of 25 years and be able to
withstand loads attributable to seismic events and climatic events of high winds.
all construction tasks clearly explained, to-be-built facilities drawn with adequate details, and
quality control measures fully identified.
operations and maintenance procedures which are safe, efficient and environmentally sound.
SCOPE OF SERVICES
Pre-Design Services
Task 1.1 - Review of Available Information
Review the relevant solid waste feasibility studies to determine the range of waste loads and waste
characteristics which the facility designs shall handle and to review the methods of transfer evaluated and
recommended.
Task 1.2 - Compile Site-Specific Information
Compile and review information available from private and public sources, to the extent feasible, which
will provide an understanding of physical conditions within the vicinity of the sites, including topography
characteristics, soil bearing capacity geologic characteristics, surface and groundwater hydrology,
drainage and sanitation conditions, water supply, fire protection, electrical supply, road conditions and
traffic.
Task 1.3 - Develop Site-Specific Data
Perform, as needed, property surveys, topographic surveys, soil borings, geophysical tests, and
identification of all underground facilities (i.e. cables, drains, gas lines, telephone lines and electrical
lines).
Task 1.4 - Analysis of Pre-design Data
Analyze the information gathered and data generated in the above tasks 1.1 to 1.3 and evaluate design
conditions. Provide a report on the engineering analysis, complete with identification of design issues
and needs.
Task 1.5 - Develop Alternative Design Concepts
Develop a minimum of three alternative layouts and process design schemes for each of the transfer
station sites. Consider alternative waste storage and unloading/loading concepts. Provide preliminary
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engineering cost estimates for each alternative scheme. Meet with the client to discuss alternatives and
select a recommended scheme.
Task 1.6 - Conduct Environmental Impact Assessment
Prepare an environmental impact assessment to meet World Bank and [] requirements. Include impacts
of traffic, noise, odor, dust aesthetics, water discharges, land use, human settlement and employment.
Assess the impacts upon the air and water quality natural biological environment, cultural and
archaeological resources and socio-economic conditions of each site and its immediate environs.
Develop mitigative measures which could be incorporated into the final design to minimize the
environmental impacts.
Task 1.7 - Public Participation
Develop informational presentation materials for GOI's use at public hearings and public workshops
about the proposed transfer stations. Conduct one public hearing for each proposed transfer station
facility to be designed under this contract.
Task 1.8 - Finalize Design Concepts
Based on input from the public participation hearings and workshops held by the client, as well as review
comments from associated agencies, modify and finalize design concepts, as appropriate. Include
mitigative measures within the final design concepts.
Task 1.9 - Environmental Impact Statement
Based on the final design with the mitigative measures, revise the environmental impact assessment into
a draft environmental impact statement on the proposed transfer station design.
Detailed Engineering Design Services
Task 2.1 - Process Design
Develop each station's detailed process design considering all design parameters and requirements
stipulated by the client and incorporate findings, conclusions and decisions developed during tasks 1.1 to
1.8 of the Pre-Design Services.
Develop the process design for safe and efficient flow of truck traffic in and out of the station and during
unloading and loading operations.
Develop process designs for management of drainage, sanitary wastes, and washwater management.
Develop process designs for ventilation and odor control systems.
Task 2.2 - Site Development Works Design
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Perform engineering and complete design of civil works to include the following:
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site preparation (such as clearing, draining, filling, grading and consolidation, as needed)
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all-weather access road from the main highway nearest the transfer station to the reception area
within the site (including on-off ramps and interchanges as needed) to meet highway design
standards for large capacity transfer trucks.
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all-weather on-site roads and parking areas to meet design load and turning radius standards for
large capacity transfer trucks.
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all-weather ramps from the on-site roads to the unloading floor of the transfer station to meet
design load and turning radius standards for large capacity collection trucks.
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transfer station main building and foundation (including unloading, storage and loading levels, as
appropriate, and hoppers).
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gate control building and foundation (including works to house weigh bridge equipment) for
incoming collection trucks and outgoing transfer trucks, as well as outgoing collection trucks
whose tare weight has not previously been recorded.
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support building and foundation (including offices for supervisors and support staff, room for
training and meetings, canteen, worker accommodations for washing/changing/resting).
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drainage system.
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washwater and sanitary system.
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fire protection system, including water supply and extinguishers to put out fires.
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workshop, including bays for repair and maintenance of transfer trucks.
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washing facilities for transfer trucks and collection trucks.
Provide an operations manual for use of the process facilities.
Task 2.3 - Electro-Mechanical Works Design
Perform engineering and undertake design of the following electro-mechanical works:
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electrical power and distribution system
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ventilation and deodorizer system
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traffic management controls
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weighing bridges
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communication system
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fire alarm/protection system
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workshop overhead crane
Provide an operations and maintenance manual for use of the electro-mechanical works.
Task 2.4 - Vehicle Specification
Provide complete technical specifications which allow comparative bidding evaluation for each
component, feature, and performance requirement for the transfer vehicles.
Task 2.5 - Architectural Design
Design the facilities to be compatible with the existing and planned structures within the immediate
vicinity of the station. Design the facilities to be functionally effective, enable economic operations, and
require minimum maintenance.
Task 2.6 - Operation and Maintenance Manual
Provide an operation and maintenance manual which outlines all operation and maintenance procedures,
schedules, and staffing requirements for the facilities and equipment to be designed. Include in the
document the necessary health and safety measures and fire protection measures which are to be part of
the operation and maintenance procedures.
Task 2.7 - Environmental Impact Statement
Based on [] and World Bank comments to the draft final design and the draft environmental impact
statement, finalize designs and the environmental impact statement for submittal to the GOI in order to
obtain environmental clearance of the proposed project.
Task 2.8 - Quantity and Cost Estimates
Prepare the bill of quantities for all works and cost estimates of pay items for each component of the
design. Define the methods of payment per item (lump sum, unit cost) which would be most appropriate
to enable cost and quality control.
Task 2.9 - Tender and Contract Documents
Prepare the following documents for Civil and Electro-Mechanical works included within the scope of
services, including:
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instruction to tenderers
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complete set of final construction drawings
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technical specifications for all facilities including installed stationary equipment
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technical specifications for transfer trucks, including yard goats and maintenance equipment and
tools
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bill of quantities
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conditions of contract
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form of contract
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bidding form
REPORTS AND PLANS
Ten copies of monthly progress reports, not exceeding ten pages, shall be provided describing the
progress made on the services required. The reports shall include the problems encountered, if any, and
major findings and recommendations as well as the basis for such recommendations.
Ten copies of the comparative evaluation report of alternative schemes for the design concepts
and ten copies of the environmental impact assessment report shall be submitted for review and approval
of the Government before proceeding to the detailed engineering design works.
Ten copies of the preliminary plans and drawings with their corresponding design analysis,
quantity and construction cost estimate. This submittal shall be made ahead of the target date of
completing the services required and shall be accompanied by all calculations and procedures used in the
design and analysis.
Ten copies of all plans, drawings, specifications, other necessary bidding documents and other
necessary related documents; three confidential copies of cost estimates and one set of reproducible plans
and drawings on stable based materials shall be provided upon completion of final design engineering
efforts.
SCHEDULE
The services of the detailed engineering design services, including pre-engineering services and
environmental impact assessment, shall be completed within a period of eight months.
TEAM
The team shall include at least one solid waste management specialist with over 15 years of related
experience, particularly with experience in the planning and design of transfer systems, one ports engineer
with over 15 years of related experience in cargo transport, ports design and ports management, one civil
engineer with over 20 years of design experience in cargo, ports, and/or transfer systems and roads, and
related design engineers with mechanical, electrical, and other essential experience required for the design
of the above discussed transfer facilities and equipment.