RFQ-LBQZQ-21-0050 Septic Tank and Trickling Filter System

Terms of Reference for supplier to construct

Trickling Filter with ABR system-036 Bouday

Oxfam Lebanon Programme

Background:

Oxfam is a global movement of people, working together to end the injustice of poverty. Oxfam has been working in Lebanon since 1993. We provide humanitarian assistance to vulnerable people affected by conflict, and we promote economic justice and good governance, and women’s rights. Oxfam also works with local partners to contribute to the protection and empowerment of marginalized women and men.

In responding to the Syrian Refugee Crisis, Oxfam addresses the emergency water needs through WaSH service provision to populations residing in informal settlements; and to those of the Lebanese host communities through efforts to improve water infrastructure and management systems.

Oxfam’s response includes water trucking services, water tank distributions, and water quality monitoring; provision of family latrines with gender-sensitive considerations and for persons with special needs, construction of grey water systems, and latrine desludging services; in addition to raising awareness around public health issues in local partners.

Project Objective:

The project is to construct wastewater treatment unit consists of ABR and Trickling Filter in one informal settlement in Bouday village (Pcode 036) aiming to decrease the dependency on desludging and provide more sustainable solution in sanitation. 

Location: Bouday 036, Coordinate: 34.0462988940001 N, 36.074500899 E, 21 tents, 21 families, 135 individuals

Activity: construction of ABR system + trickling filter+ carbon filter+ soakaway pit and wetland

Closing Date: Offers to be submitted on or before Friday September 3rd, 2021 at 3:00 PM.

Submission should be by email to lebanonprocurement@oxfam.org.uk with subject “RFQ-LBQZQ-21-0050 Septic Tank and Trickling Filter System”.

Annexes and BOQs: https://oxfam.box.com/s/4bau0z10akd6w3hlx4cbyhmnn6ykylx6

Content of Works:

• Relocation of seven latrines superstructure and installing 14 new latrine structures.
• Installation of 21 holding tanks (1300L) to act as settlers.
• Installing and connecting the existing latrine to network composed of manholes, 4’’ and 6 ‘’ PVC pipes.
• Excavating pit and installing 6 vertical 1000L tanks to act as ABR system.
• Excavating pit and installing one vertical 1000L tanks outside the ABR system to replace the pump in it.
• Installing 2000L vertical tank to act as a trickling filter and placing trickling media inside it.
• Excavating soak-away pit and constructing a wet land and planting high rate absorption trees.
• Installing a fence around the system.
• Installing solar operating system of the single phase 0.5 HP pump including the control cabinet.
• Installing the operation room under the panels stands.

Description:

Install 21 plastic underground holding tanks to each latrine in the site. Connect the holding tanks to the ABR system by constructing wastewater network (pipes and manholes).

Construct ABR system made of 6 vertical plastic tanks, each tank 1000L, have diameter 94cm, height 174cm. Connect the ABR tanks with each other using PVC pipe 4". And install PVC pipe 4" inside the tank and T-connection. To decrease bad odor, install a 300 L plastic tank raised on a steel stand to be used as a carbon filter, filled with charcoal, and connected to the ABR tanks.

Connect the ABR system to another 1000L vertical plastic tank located outside the ABR room in aspirate block pit and install submersible pump in the tank to pump the water from tank to the trickling filter. Solar system will be installed in the site to run the pump if there is no electricity.

Trickling filter: 2000L plastic tank raised on steel stand. The plastic tank will be filled with Media (Bed biofilm) and metallic open nozzle sprinkler 1/2'' will be connected to the HDPE pipe inside the trickling filter tank in addition to fine bubble Oxygen air diffuser to promote the aerobic treatment.

The trickling filter will be connected to a soakaway pit 240*190*150cm.

And finally, soakaway pit will be connected to wetland of dimension 2.5* 12.5-meter, perforated PVC 2inch pipe will be installed on the ground.

General Conditions:

• The contractor must take into consideration COVID-19 precaution measures during the construction.
• Oxfam has the right to request additional items.
• The period of execution the works in the site shall up to 20 working days from date of handover the site.
• The contractor should prepare and submit technical and financial offer for the works with details of the execution plan, detailed Bills of Quantities and execution schedule.
• The contractor will be responsible to provide transportation for his worker to the sites all the days, taking into consideration the restrictions on movements.
• The contractor must visit work sites before submitting his technical offer.
• The tender items are not dividable.
• The site engineer may amend what he deems "technically" suitable for the project and after taking the approval of Oxfam, and the Contractor must abide completely with instruction of the supervising committee.
• The Contractor’s relationship will directly be with OXFAM staff and not with the refugees. OXFAM will inform the contractor on the date of starting the construction before one week.
• OXFAM staff or his representative will onsite during the construction.
• Oxfam shall give the approval before installing any item especially tanks, trickling materials, pumps, sprinklers, others.
• Any material that is not available in the market, an approved alternative item should be installed.
• The contractor shall execute all work required in the presence of the site engineer or his/her representative considering that the supervision committee has the right to require re-implementation in case of violation of specifications agreed in the technical Book of Conditions or the instructions of the supervising committee or which have been executed in the absence of Oxfam supervisors without informing the supervisor of the time of executing the works.
• Oxfam WASH Team or his/her representative is responsible to monitor and confirm the work.
• The contractor should have the capacity to excavate in different type of soil (muddy or rocky) and comply to secure the needed heavy machine based on the execution requirement.
• The contractor must present all items/data sheet to Oxfam’s technical team for their validation before installing them.
• Ensure safety and security/prevention to avoid any accident while implementing.
• Oxfam has the right to increase or decrease quantities at the same unit cost.
• Cleaning and removing the existing debris and unused materials from inside and around the site and transporting debris outside the site as directed by the engineer.
• Excavation in sandy soil or any other soil. The price includes excavation for any unwanted existing soil, organics, etc to any levels as per engineer instruction and approval drawings. The price also includes transportation of excavated material to approved dump area according to supervision engineer’s instructions.
• The contractor must reinstate the site, taking in consideration maintaining good levelling of the site.

Contractor:

• The contractor must ensure that the supplied items are brand new and not renewed, and that applies to all the supplied items. Preference is given to the items that have proven technical quality and efficiency during the operation
• The contractor is committed to all the engineering designs and drawings attached with these technical conditions including the quantities and dimensions. The Contractor may not increase or decrease these quantities without the written consent of Oxfam.
• Any unclarified items in the BOQ or the drawings must be discussed with Oxfam staff.
• Procedure of execution in the site will be shared with contractor after signing the contract.

All the bidders must do a site visit that will be organized by Logistic team and program team before submitting their offers.

Selection criteria for administrative compliance:

This part concerns the information given in the supplier questionnaire, each Bidding parties can also include any other document he wishes, to assist us in judging their suitability according to the below criteria:

• Company Profile.
• At least Three years of experience in the same domain of construction (company name, contact name and phone number, recommendation letters).
• Size of customer database - along with a list of your main customers including any Non-Governmental Organisations (NGOs) and U.N. agencies
• Copies of Institution registration certificate and VAT registration certificate (if available) apply for companies only not individuals.

Pricing / Required Details

The prices must be presented according to the following titles:

1. All tenderers must be qualified technically and financially to be able to submit their offers
2. The unit prices and rates must be presented in US dollars for each of the offer items.

Coordination and Supervision

The activity will be supervised by Oxfam’s PHE team. Oxfam may assign additional staff during the implementation of activity.

Questions / Request for clarification

Any requests for clarification may be submitted by email to akfoury@oxfam.org.uk cc SHeneskehian@oxfam.org.uk on or before September 1st.

Site Survey:

Supplier intend to apply to the site visit should send email to akfoury@oxfam.org.uk cc SHeneskehian@oxfam.org.uk.

A mandatory meeting will be held at the Oxfam Zahle office, the tentative date will be on 30/08/2021 at 09:30 am, to present the project requirements and allow for a Q&A for interested bidders.

A mandatory site visit on the same day at 10:00 am will be facilitated by the Oxfam technical team.

Failure to attend the meeting and site visit will be considered as disqualified and result in rendering the absent bidder as ‘non- eligible’.

Timeframe and Payment

100% payment in Fresh USD after completing the construction of the requested quantity and submitting the financial documents.