Page 1of 14TECHNICAL SPECIFICATIONS 1.General Requirements: The work consists of following projects: a)New construction of five (5) toilet detached with hand washing facility equipped with 3-seater latrines. b)New construction of two (2) toilet detached with hand washing facility equipped with 4-seater latrines. c)New construction of one (1) hand pump with apron.d)Rehabilitation of one (1) deep well.e)Rehabilitation of one (1) concrete water reservoir. f)Construction of four (4) concrete stand for elevated water tank. g)Rehabilitation of toilet/wash facilities and water supply network of 8 schools. 2.Sites Location: The construction will be in the Municipality of Ajuy and Balasan, Iloilo Province in the following locations: School Name Project LANJAGAN PRIMARY SCHOOL oConstruction of 3-seater toilet detached with hand washing facilities.oConstruction of one (1) concrete stand for elevated water tank, provision of 1 cu. meter water tank, 1 hp double suction water pump. oRehabilitation of two (2) wash facilities, toilet walls & doors and water supply connection/network. PINAYESPINOSAELEMENTARYSCHOOLoConstruction of 4-seater toilet detached with hand washing facilities.oConstruction of one (1) concrete stand for el evated water tank, provision of 1 cu. meter water tank, 1 hp double suction water pump. oRehabilitation of two (2) wash facilities, toilet walls & doors and water supply connection/network.
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other harmful substances and/or coatings. Earth surfaces shall be firm and damp before
placing concrete. Placement of concrete on mud, dried earth, and uncompact fill sub
grade will not be permitted.
• Layers: RC slab concrete shall be placed to design thickness in one continuous layer.
•
Consolidation: each concrete layer shall be completely consolidated by spading, handtamping, or mechanical vibrators as necessary to ensure smooth, dense concrete along
form surfaces, in corners and around embedded items without segregation or laitance.
• Vibration: shall not be applied directly to the reinforcement steel, forms, or to concrete
that has begun to set. Excessive floating or toweling while the concrete is soft shall not
be permitted. The addition of dry cement or water to the surface of the screened
concrete shall not be permitted.
• Curing: concrete shall be prevented from drying for a period of at least 7 days after
placement.
Exposed surfaces shall be kept continuously moist for the entire period. Formed
surfaces shall be kept wet until patching or repairs are made.
Concrete surfaces subjected to heavy rainfall, running water and/or other moisture
damage within 1 day after casting will be rejected.
• Removal or Repair: concrete that is honeycombed, damaged, or otherwise defective,
shall be removed or repaired and approved by the technical representative.
• Embedded Items: Items to be embedded in concrete shall be positioned accurately
Dimension: Infiltration chamber: 1.10m x 1.10 m x 1.20m; soak pit: 1.20m x 1.20m
x 1.20m
•
Gravel/ Aggregate Component: Infiltration chamber filled with charcoal, pebbles,course sand and fine sand. Soak pit filled with washed stones 2” – 4” diameter up to
Natural Ground Line (NGL).
• Protective Cover: Cover with Polyethylene sheet 200 microns. On top of the
Polyethylene sheet, concrete slab is needed with 5 cm thickness x 1.20m x1.20m. With
8 mm diameter temperature bar spaced @ 0.30m x 0.30m on centre, both ways.
Item 14: Hand & Foot Washing Facility:
• Quantity: Provide two (2) elevation of hand washing facilities in front of the proposed
latrine building. Two (2) foot washing area 0.50 m x 0.50 m square dimension at the
opposite side of each handwashing facility, provide 1 faucet and 1 drain for each foot
wash area.
• Composition: Use 6” CHB wall and concrete counter top with 8” x 8” glazed wall tiles
(2 layer only) and 8” x 8” glazed floor tiles (White Color)
• Faucets: Provide stainless, ½” diameter heavy duty faucets for hand washing facility.
• Floor Drain: Provide 4” x 4” floor drain.
• Wall Tiles- The height of wall tiles must be 0.40 m above the counter top Finish Tiles.
Use 8”x8” (glazed) wall tiles, Mariwasa brand, or its equivalent. China tiles is not
accepted.
• Counter Top Tiles- Use 8” x 8” (glazed) counter top tiles (White Colour), Mariwasa
brand, or its equivalent. China tiles is not accepted.
•
Tile Sink- The depth of the Tile Sink is 0.10 m.
• IEC Sticker Area – Provide proper handwashing sticker area with 0.35 m height made
of acrylic plastic sheet.
Project 2:
Typical Works to be done for the construction of concrete stand for elevated water tank projects
are as follows:
Item 1: Earthworks:
• Excavation: All excavation activities are to conformed with the desired dimensions of
concrete stand. All structures are to rest on a stable sub soil stratum as to the existing
depth unless a deeper excavation is needed to attain the desired stable sub soil stratum
and to be consulted with the Technical Personnel in charge. All soft soil, muds, and
loose soils are to be removed until stable sub soil stratum are identified.
•
Backfilling: All backfill materials are to be of good quality materials composed of good
quality soil and minimal sizes of rocks and stones up to maximum of 1” diameter in
sizes. Backfill materials subjected to excessive amount of moisture and water content
• Cement: Cement bags: delivered materials in manufacturer's original, unopened, no
over-compacted, undamaged bags with identification labels intact. Cement shall be
stored so that it is protected from weather, dampness or other destructive agencies.
Cement that is partially hydrated will be rejected.
Use Portland cement only, 40 kg per bag.
• Sand: for any RC structure and cements mortar shall be utilized washed river bed sand.
Sand shall contain no sod, brush, roots, mud, oil, or other perishable material. Grain
size may vary between 0.2 to 2 mm. Sand shall be stored and handled by methods that
prevent segregation of particle sizes (sieves) or contamination by intermixing with other
materials.
Use S-1 or white sand, fine, for CHB mortar and filler.
Use S-1 or white sand, fine and 1/8” sieved for CHB plastering.
• Gravel/Aggregates: individual aggregate shall be dense, sound and free from cracks,
seams and other defects conducive to accelerated weathering. Grain size may vary
between ½ in to ¾ in. The aggregates shall be angular to sub-rounded in shape.
Rounded river aggregate may be accepted after inspection.
• Water: water to be used must be clear and clean; free from any dirt, mud and
contamination. Avoid using salt water.
• Forms: forms shall be wood, plywood, steel or other approved materials and shall be
mortar tight. The forms and associated false work shall be substantial and unyielding
conforming to dimensions of the finished grade. Form surfaces shall be smooth andfree from holes, dents, sags or other irregularities. Forms shall be coated with a no
staining form release agent before being set into place.
• Steel Reinforcement: the steel reinforcement shall be grade 40 deformed steel bars
unless otherwise specified on the drawings. The steel shall be securely tied by double
course of bending wire and positioned to prevent movement during the placement of
concrete.
• Conveying: the maximum length of time between introduction of the cement to the
aggregates and placement of the concrete in the forms shall not exceed 15 minutes
for concrete temperatures below 29o C or 30 minutes for concrete temperatures above
29o C.
•
Placing: concrete shall not be placed until the sub grade, forms, and steelreinforcement have been inspected and approved by the Client’s technical
representative. The person responsible for construction shall have all equipment and
materials required for proper consolidation and curing, available at the site ready for
use before placement of concrete begins.
The depositing of concrete shall be regulated so that concrete may be consolidated
with a minimum of lateral movement, segregation, laitance or honeycombing.
• Site Preparation: prior to placement of concrete, the forms, reinforcing steel, and sub
grade shall be free of chips, sawdust, debris, water, extraneous oil, mortar, rust or
other harmful substances and/or coatings. Earth surfaces shall be firm and damp before
placing concrete. Placement of concrete on mud, dried earth, uncompact fill sub grade
will not be permitted.
•
Layers: RC slab concrete shall be placed to design thickness in one continuous layer.
• Consolidation: each concrete layer shall be completely consolidated by spading, hand
tamping, or mechanical vibrators as necessary to ensure smooth, dense concrete along
form surfaces, in corners and around embedded items without segregation or laitance.
• Vibration: vibration shall not be applied directly to the reinforcement steel, forms, or
to concrete that has begun to set. Excessive floating or toweling while the concrete issoft shall not be permitted. The addition of dry cement or water to the surface of the
screened concrete shall not be permitted.
• Curing: concrete shall be prevented from drying for a period of at least 7 days after
placement. Exposed surfaces shall be kept continuously moist for the entire period.
Formed surfaces shall be kept wet until patching or repairs are made.
Concrete surfaces subjected to heavy rainfall, running water and/or other moisture
damage within 1 day after casting will be rejected.
•
Removal or Repair: concrete that is honeycombed, damaged, or otherwise defective,
shall be removed or repaired and approved by the technical representative.
• Embedded Items: Items to be embedded in concrete shall be positioned accurately
Steel Water Tank: Provide steel water tank with one (1) cubic meter volume, use
high quality of tank and pipes.
Electric motor pump: 1 horsepower (hp) double suction electric water pump.
Foot Valve and float switch: use on deep well to help protect against loss of prime
in the well piping system. Float switch specifications will depend on well height.
Project 3:
Typical Works to be done for new construction of hand pump, rehabilitation of toilet/wash
facilities and water supply network:
Item 1: Inspection:
• Inspection: All contractors are requested to conduct school site inspection focusing on
the existing water supply network. With the aim of stabilizing a good water pressure at
all times, all pipes and fittings are to be inspected diligently. All pipes and fittings found
to be substandard, defective and damaged causing leaks that causes lower water
pressures are to be replaced. All the existing water pipes and fittings are to be utilized
as long as they are in good quality and conditions. All materials to replace are of Class
“A” Quality or higher Quality whether it is made up of Galvanized Iron, PVC, Poly
Ethylene (PE) or Poly Butylene (PB). Additional new water pipes and fittings are to be
used together with the recovered water pipes and fittings to complete the new water
network. As much as possible, used the same quality of materials or a higher quality ifneeded. Never re-used substandard and damaged materials. If found that the existing
materials used are substandard and damaged, it is recommended that these materials
need not to be used again. The contractor will be the one to make the necessary water
layout for the whole water network indicating the locations of pipes and fittings to be
replaced. The contractor will submit the required bill of quantities and estimates for the
revision/ repairs of the existing water network which make part of the Bid Price.
Item 2: Water source & layout:
• Water source & layout: All contractors are requested to make the necessary water
layout for the whole water network indicating the locations of hand pump, pipes and
fittings to be constructed/replaced. The contractor will submit the required bill ofquantities and estimates for the revision/ repairs of the existing water network which
make part of the Bid Price. The new water layout must be installed underground.
Item 3: Materials:
• Kinds: All materials to be used are of the same kind of materials or of higher quality
as to the existing, whether it is Galvanized Iron, PVC, Poly Ethylene (PE) or Poly
Butylene (PB).
• Quality: All materials to be used are of the same Quality as to the existing provided it
is not substandard. All substandard materials need not to be used again. All damaged
materials need not to be used as well. Provide materials that are standards and number
1 in Quality to ensure that the water network will function more efficiently in a longer
• The work shall consist of the removal of surface water and ground water as needed to
perform the required construction. This also includes the dewatering of excavated sites.
It shall include furnishing, construction and operation of all temporary facilities andequipment. Protective measures needed to divert stream flow and other surface water
shall be built, maintained and operated during construction.
• The construction site shall be dewatered and kept free of standing water or excessively
muddy conditions as needed for proper execution of the construction work. All
temporary works shall be accomplished in such a manner that erosion and the
transmission of sediment and other pollutants are minimized.
10. Deep well Abandonment/Decommissioning.
The work shall consist of sealing the deep well with grout (Cement mix) to a depth not
less than two (2) meters from the ground as directed by the supervisor. This works will
be done as a result of not meeting the quantity expected and failure to meet the
drinking water standards as applied in Philippines and failure to have a
remedial/treatment measure for the failed parameter(s).
11. Monitoring/ Picture Documents:
• There must be a Technical Personnel/ Civil Engineer from the Contractor’s side that
will monitor and supervise the flow of construction. Progress report must be
submitted every Thursday of the week and to be double check by PRC TPA / PRC
Engineer. Monitoring template to be supplied by the PRC.
•
Picture documents before, during and after every construction activity must be
submitted by the CONTRACTOR prior to any Payment Request.
12. Inspections:
Prior to any concrete pouring activity, pouring request is to be secured by the
contractor. Inspection by the PRC TPA/ PRC Engineer is a must. No concrete pouring
activity must be undertaken without the presence and approval of the PRC Project
Coordinator/ PRC Engineer.
13.
Environmental guidelines and code of conduct
• Groundwater exploration and development work should be conducted in an
environmentally and socially sensitive and responsible manner. These guidelines are
intended to ensure that all parties are aware of the potential impacts of their activities,
and carry out the work in an appropriate way.
• These guidelines are a written statement of intent for Contractor to adhere to, and to
which recourse can be made in the event of a perceived undesirable impact. Contractor
are required to familiarize all employees with the content and spirit of these guidelines.