Installing Deep Tubewellsin Haor and Coastal Areas of Bangladesh:
A Checklist
This Guideline for Deep Tubewells Installation has been developed based on Concern Worldwide's past
experiences with Charity:Water, as well as, our
existing guidelines and that of our implementing partners.
Need Assessment: ● Conduct Social Mapping through Participatory Rural Appraisal (PRA)● Collect data from Upazila Of�ices to assess Water, Sanitation & Hygiene (WASH)
coverage● Analyse problems related to existing Water technologies
Primary Site Selection: ● Ensure Community Participation in Primary Site Selection through WASH Committee ● Collect information on underground aquifer from Department of Public Health
Engineering (DPHE)
STEP
1
STEP
3
STEP
2
STEP
4
Pre-Installation Phase
Water quality Testing and Site finalization: ● Conduct Site Veri�ication by Concern and partner Technical staff ● Conduct Pre–installation testing of Arsenic in existing Deep Tube-wells in respective
locations. A Salinity test required for Coastal area.● Finalize site for water source which has to be within 1,000 metres of the
Community's neighbourhood, ensuring that water collection time does not exceed 30 minutes.
Technology Selection: ● Finalize Water technology based on Water test result, and Feasibility study of existing
water technologies (space, availability of materials for regular operation, etc.)● Review design in consultation with the community.● Vetting of technical design by Concern Worldwide, partner organisation and DPHE
Installation Phase
Selection of Vendors for Materials Supply:● Follow Concern's purchase policy, and allow 6 weeks for tender processing● Conduct physical veri�ication of Vendors by both Concern and partner
representatives before �inalization.● Prepare a Comparison statement with recommendations to �inalize the vendor.● Sign contract agreement between Vendor and Partner organisation.● Verify supplied materials and check quality checking by referring to the agreed
samples jointly by Partner organisation and WASH committee.● Handover materials received to WASH committee which will then be responsible for
storage till installation. ● Document the muster-roll with receipt acknowledgement by partner organisation.
STEP
5
STEP
7
STEP
6
Mason Selection and Orientation ● Select Mason group through tender process● Finalize Mason selection through physical veri�ication at �ield level.● Provide orientation to Masons on design and construction work.
Transparency and Accountability: ● Set up Complaint Response Mechanism (CRM) Box at a bazaar, village centre or
the Union Parishad of�ice to make it accessible to the Community ● Set up display boards across Community and schools highlighting project details,
deliverables, total budget, donor’s name, etc.
For drilling bore holes: ● Contracts to be made in phases, i.e 2 boring/union; ● Start drilling the borehole using sweet surface water (Water from
Shallow tube-wells is allowed, but saline water is prohibited); ● Collect soil sample at 50ft interval till reaching the deeper aquifer, and
then collect soil samples at 20/10 feet interval (as appropriate);● Con�irm suitability of the aquifer based on the coarseness of sand and
depth of sand layer. (If suf�icient thickness of sand, or course of sand is not found, then the tube wells should not be installed. It is advisable to go for a new context analysis with Concern and DPHE);
● Take off the drilling equipment from the borehole once the aquifer is identi�ied, and then install PVC �ilter and linings inside the borehole.
● Inspect construction at regular intervals.
Water Quality Testing: ● Test the Water quality of the newly installed
Tube-well before constructing the platform following the arsenic testing protocol.
● Pump water from Tube-well for 3 weeks after platform construction, and send the water sample to recognized Water Testing laboratory for further Arsenic testing.
● The result should be shared with the user community.
● The salinity must be tested in lab of the Upazila Fisheries Department in Coastal regions.
● Paint/mark spout of Tubewell with red colour if the test result is above the Arsenic permissible limit, and do not �ix the head of tubewell. Educate the community to stop using contaminated water for drinking and cooking purposes, and �ind alternative options as a source of safe drinking water.
Platform construction: ● The platform should be of a square size, with
dimensions of 6ft. Construct brick masonry platform following appropriate design of contexts.
● Allow 1 week as curing period before pumping water from the newly installed Tube-well.
● Fix a hand rail made of GI pipe at the left side of the steps to make the water source accessible for pregnant women and elderly people.
● Install a PVC pipe (2-inch diameter) at each water point to drain waste water safely, which is compulsory to avoid further contamination.
● Install a 5ft deep soakwell using RCC ring (2-6 inches diameter) and cover slab, and connect the tube-well drainage if there is no existing drainage provision.
Location:Ensure that Location of bore holes are at least 10 meters away from the latrine.
STEP
8
Installation process
Post-Installation Phase
STEP
9
STEP
11
STEP
10
Post implementation water quality testing:
● Test water sample for Arsenic at all water points using �ield test kits before platform
construction . ● Send the sample from each water point to validate �ield test results after
construction following 3 weeks of water pumping .● Develop a database of the Arsenic test result with Depth and GPS information for
documentation and record.
Hand over and Follow-Up:● Handover to User Community and Schools: Collect acknowledgement signature
from Village WASH Committeee and School Authority. Project Handover to On-going programme: Ensure that responsibility is taken
over by the ongoing development programme for post implementation follow-up ● Continue hygiene education : Follow Water Safety Plan to maintain the water
quality and ensure safe drinking water in 5 different areas (Source, Collection, Transportation, Preservation, and Consumption).
Operations & Maintenance: ● Select 2 members from WASH committee as Caretakers● Train Caretakers in basic maintenance and operation by engaging DPHE. ● Establish a regular operation and maintenance schedule for Caretaker ● Ensure fund generation for maintenance and collection for regular operation by
Caretakers.● Ensure tools and spare parts are available to the user community.
Note- The Maximum Contaminant Level (MCL) set by WHO is 0.01mg/L, or 10 ppb, as the global
standard. However, Bangladesh has adopted the WHO guideline of 0.05mg/L, or 50ppb, as the national standard.
- The maximum consumption limit of Total Dissolved Solid (TDS) is 600ppt based on taste. For Coastal areas in Bangladesh, TDS can be considered upto 1000ppt. WHO forbids the consumption of water with TDS above 1200ppt.
Need Photo
Available documents from organizations like WHO, Unicef, Water Aid and DPHE have also been reviewed when creating this Checklist.
