Rehabilitation of the Main Sewer Line Network of Al Saylah in Sana’a City , Replacement of 6.5km transmission line ( 5148m).

New clarification added: Question 50 : With reference to instruction to bidders (ITB) , Article 8 and RFQ /2022/42136 dated on June 8th , 2022. for Rehabilitation of the Main Sewer Line Network of Al Saylah in Sana’a City, Replacement of 6.5km transmission line Lot-1 ( 5148m) Project. We AL REHAB Engineering, Agencies & Gen. Contracting Company Ltd.  thank you for extending the bid submission period up to July 21th ,2022., but this extension occurred during the official holiday of Eid al-Adha, so we were unable to take advantage of this extension.In this connection we Request for reasonable time to prepare all documents and requirements for the above subject mentioned. Therefore please extend the deadline for quotation submission up to Aug.18th ,2022.Answer : Regret to inform you that this case is under Emergency  Procurement Process.Question 51 : Where can we Upload the following?1. HSSE Plan.2. Emergency Plan.3. Traffic plan.4. Waste management plan.Answer : You can upload them in the “OTHER “ folder.Question 52 : We would like to inform you that we do not intend to submit the bid due to the union of our company Mohammed Mogalli Corp. For General Trade & Construction  Answer: We are sorry for not being able to participate, and we hope that you will participate in other bids.

New clarification added: Question 48 : We would like to clarify that the file named (02-Technical Specifications-Amendment_08-Jul-2022 ) is empty and does not contain any data. Please check and re-upload it.Answer : Please try to redownload it again , it is not empty. Question 49 : For the Priority_ SEA_SH PRAP Template for Contractors document, is it required to be filled out or just to sign and stamp it?Answer : Yes , it is required  to be filled out page # 4 , sign and stamp it.

New clarification added: Question 47 :47.1. In REQUEST FOR QUOTATION LETTER, at the end of the second page. It written as following:  (Please acknowledge the receipt of this RFQ by returning Schedule 0.12 [Quotation/No Quotation Confirmation] (see Section VI: Returnable Schedules) far in advance of the quotation opening date as possible, to the email address: [insert email address], indicating whether or not you intend to submit a quotation. If you are declining to submit a quotation, please state the reasons on the form in order for UNOPS to improve its effectiveness in future requests.)So, we are intending to submit a quotation and we already filled up the returning Schedule 0.12 [Quotation/No Quotation Confirmation] but to where should we send it or submitted to show our intention in participating the competition because not clear details.Could you please advice us in that matter or tell us where to submit that document or to which email should we send to?Answer : Please note that since this case is posted in the system , all bidders offers should be uploaded and submitted through the system , please review the following documents which will help you in the submission process : UNOPS_eSourcing_Training_Vendors (Arabic) document.UNOPS Presentation on Procurement tenders (Arabic) document.47.2. In SCHEDULE 1: CONTRACT DETAILS / 1.2 Details Provided by the Contractor, in point 4.3. There is a name written in the ponit 4.3 which is (Name: Fayyaz Ahmad Faiz Rasul), is that name as an example or should we left it written us came from your side and ignore the point 4.3.  ?Answer: Please do not remove it as , this point is related to UNOPS part.

New clarification added: Question 46 : 4.1B Daywork Schedule How is this table filled out? Or is it the same table in Annex 01 of daily work, and we suffice with reference to it only. please clarify?Answer : Details in accordance with Sub-Clause 9.4 of the General Conditions9.4 Daywork “For work of a minor or incidental nature, the Employer may instruct that a Variation shall be executed on a daywork basis. The work shall then be valued in accordance with Sub-Clause 9.2 [Valuation of Variations]. (b) The Contractor shall keep records of hours of labour and Contractor's Equipment and quantities of Plants and/or Materials used.”

New amendment added #7: This amendment was raised to upload the following documents:Annex 01 .2  Bill of Quantity_Amendment_08-Jul-202202-Technical Specifications-Amendment_08-Jul-2022

New clarification added: Question 43 : What can we fill in the  0.7 Performance Statement? Answer : Please fill all required information as per each  RFQ document. Question 44: could you please advise regarding the Performance guarantee, which form we have to fill and sign due we found two forms in the tender documents ( 5.2 Form for Performance Security & 0.8 Form for Bid Security )  Answer : Kindly know that the Performance Security Form this should be completed after awarding by the supplier , in regard to the Form for Bid Security it is not applicable .Question 45 : I suggest that there be a special clause for the supply of GRP pipes. When they are delivered and supplied, their dues will be raised to the contractor and paid to him, and the installation and drilling process will be held. The contractor will be held accountable according to what he has done because such type of pipes cannot be sold by the supplier in the local market and is only required for such These giant projects, if God forbid and hinder the implementation of the project for any of the obstacles, for example, will you pay the contractor the price of what was received from the GRP pipes Answer: Please refer to the document of 02-Technical Specifications-Amendment_08-Jul-2022 which will be published soon. 

New clarification added: Question 42 : أقترح أن يكون هناك بند خاص لتوريد أنابيب GRP عند إيصالها و توريدها يتم رفع مستحقاتها للمقاول و تدفع له و عملية التركيب و الحفر يتم محاسبة المقاول وفقا لما نفذه لأن مثل هذا النوع من الأنابيب لا يمكن للمورد أن يبيعها في السوق المحلية و ليست مطلوبه الا لمثل هذه المشاريع العملاقة  لو قدر الله و تعرقل تنفيذ المشروع لأي من المعوقات مثلا هل ستدفعون للمقاول ثمن ما ورد من الأنابيب ال GRP.I suggest that there be a special clause for the supply of GRP pipes. When they are delivered and supplied, their dues to the contractor are raised and the installation and drilling are paid to him. The contractor is accounted for according to what he has done because such type of pipe cannot be sold by the supplier in the local market and it is not required except for such Giant projects, if God forbids and hinders the implementation of the project for any of the obstacles, for example, will you pay the contractor the price of what was received from the GRP pipes.Answer : Please refer to the RFQ condiations

New clarification added: Question 41 :There are some notes and there are some important notes for the study that must be taken enough information about .·     We kindly ask you to provide us with the drawings that show all services located in the path of the project such as (Telephone, electric, and water network) which may conflict with the path.Answer:  Answer: Please refer to the document of 02-Technical Specifications-Amendment_08-Jul-2022 which will be published soon.Or provide us with an official letter from you to the authorities concerned with these services.·     We kindly ask you to provide us with the drawings and sections that show all details of bridges and its foundations that could hinder the project? Answer: Please refer to the document of 02-Technical Specifications-Amendment_08-Jul-2022 which will be published soon.·     We kindly ask you to amend the bills of quantities according to the amendments contained in the clarifications such as type of casting for manholes (in BOQ precast, but in clarification cast in site).Answer: : Please refer to the Annex 01 .2  Bill of Quantity_Amendment_08-Jul-2022 which will be published soon.·     What details and description of stairs of manholes? Answer: Please refer to the document of 02-Technical Specifications-Amendment_08-Jul-2022 which will be published soon.·     Kindly specify the type of compressible materials that must be put around pipes in concrete walls . Answer: Please refer to the document of 02-Technical Specifications-Amendment_08-Jul-2022 which will be published soon..          Kindly specify the type of materials that required for lining of manholes . Answer: Please refer to the document of 02-Technical Specifications-Amendment_08-Jul-2022 which will be published soon.

New clarification added: Question 40 : 1.  As per the clarification , MC-1 is not in  scope of present tender . But the BOQ  has an item for MC-01 . Should the Bidder keep it blank ? Answer: Please complete all required data  and submit the completed form. 2. Clarification reply no 36.1 states that to no the scope of work for lining / modification of existing manholes could be obtained from BOQ Bill-01 / item 1.2 . But this BOQ Item is for demolition and given in one line as " Intersecting bypasses " . Bidder fails to understand how it could provide the detailed modification scope of the existing manhole. No technical specification is available for this scope . Answer: Please refer to document of 02-Technical Specifications-Amendment_08-Jul-2022 which will be published soon.3. Reply to clarification 36.3 is still not clear . The clarification and drawing notes are contradictory to each other . We need clear confirmation as to which one will prevail . If the drawing notes prevails then the  Bidder needs to construct both rectangular and circular manhole depending on entry and exit pipe angle. These manholes  have different concrete quantities and therefore will have different unit rates . However , the only BOQ item for manhole asks for  unit rate of only circular manhole . Please clarify clearly how the bidder will price  the rectangular manholes ? Answer: : Please refer to the Annex 01 .2  Bill of Quantity_Amendment_08-Jul-2022 which will be published soon.4. The clarification reply and the BOQ iem asks for Cast in  Situ manholes . However , the technical specification given is only for Precast manholes . Should the vendor assume that same  specification will apply for cast in situ manholes also ? Answer: : Please refer to the Annex 01 .2  Bill of Quantity_Amendment_08-Jul-2022 which will be published soon.5. Replying to 3.3 and Drawing SMSTL -DD-8001 shows that 16 mm dia transverse re-bar should be extended to the existing concrete layer by 1 meter . But , this is not possible without exposing the reinforcement  of  1 meter of  existing concrete layer on both sides of the trench , and then to lap the new 16mm dia transverse re-bar with old reinforcement . Please confirm if   Bidder's understanding is correct . Answer: Please refer to the RFQ technical specification and drawing 

New clarification added: Question 39: Could you please clarify the confusion we faced in the vendor submission or required documents (Documents Checklist), is there any differences between the following: (BoQ's to added in Excel Format for Part 1 and Part 2 in addition to Summary Sheet for Part 1& 2) Vs(Annex 01 - Bill of Quantity Financial Offer should be submitted in both (PDF + Excel ) format)Answer: Please submit all required completed document of Annex 01 - Bill of Quantity

New clarification added: Question 37 :It must be extend deadline of tender at least two weeks , because of the work required to submitted is huge , & to let's be able submit accurate offerAnswer: Please accept our apology , as we can not since the tender is posted since 08-Jun-22. Question 38 : The subject is requesting an extension for the tender deadline. We thank you for your understanding and extended the deadline of submission the tender offers until July 21, but we unfortunately would like to inform you that this extension period is not fully utilized because it took place with the a formal holiday of Eid Al-Adha which all company's staff or related suppliers in-board is on leave , even the out-board communication with suppliers is suspended while the holiday.  However, we are kindly seeking your kind help in considering more extension period for not less than two weeks which we really need to let us be more accurate in our offer. Answer: Please accept our apology , as we can not since the tender is posted from 08-Jun-22 ,  and the deadline is on 21-Jul-22. Also we have put all of this in our consideration.

New clarification added: Question 36:1.   Bill -2 / item 4.1 states that the Bidder needs to Renew and maintain the lining of 23 numbers of existing manholes. However no detailed scope of work was mentioned. Can the Bidder assume that these are the same manholes which are referred in drawing no. SMSTL-DD-5002/page 1of2?  However, this drawing is not mentioning any lining but stating that the Bidder needs to do the lateral connection and modify the benching. Also, the number of existing manholes in this drawing are more than 40. Therefore, please clarify the actual scope of work in Bill -1 / Item 4.1.   Answer: In addition to what you mentioned Please refer to the RFQ  BoQ  Bill -1/ item 1.2 2.   Drawing number SMSTL-DD-2005 / Sheet 4 of 13 states that the existing Foul sewer chamber shall be demolished by Contractor. However, no detail of this chamber is given to estimate work involved. Could you kindly provide the detail of this chamber?Answer: Please note that the  work in this chamber  ( Historical bridge ) is not under this RFQ. 3.   Drawing number SMSTL-DD-8002 (in the Note no. 3 and 8) states that rectangular manholes shall be constructed when the angle between the incoming and outgoing pipe is less than 170 ° and circular manhole shall be constructed when this angle is between 170° - 180°. This is probably to prevent the tangential entry of manholes in circular manhole which makes the joint construction difficult and weak. However, your Clarification reply number -3 states that Contractor should refer to circular manhole only.  Please clarify   whether provision of note -3 and 8 of drawing SMSTL-DD-2005 apply or, notwithstanding this provision, all manholes are to be Circular?  Answer: The clarification regarding the manhole type does not delete or replace the exception case for Notes no. 3 and 8 on SMSTL-DD-8002. 4.   Are there any asphalt layer on top of Stoning in the existing Pavement surface?Answer:  We confirm that the reinstatement will result in no change in the current situation.5.   Drawing number SMSTL-DD-8001 shows an RCC concrete layer (layer mark 7) . The drawing shows this section as a general or typical. Therefore, please confirm that this layer of RCC is to be constructed along the entire 1200 mm dia pipeline route.Answer: Please note that in the existing situation the RCC concrete layer exists, the contractor shall demolish and reinstatement in accordance with the existing situation  and Drawing number SMSTL-DD-8001 6.   The same drawing above (SMSTL-DD-8001) provides the trench profile with vertical side. This is not possible practically as the trenches are up to 5 meter deep and minimum slope is to be provided for safety. This would mean that the quantities of backfilling for different layers would increase from what is indicated I am drawing. Please confirm if this additional quantity will be paid as change order or the bidder should keep this consideration in their pricing. Answer: Please note that the work shall include all types of excavation and backfilling as shown in the RFQ BoQ . The most important is the contractor shall also ensure all types of support/ shoring within the item price. 7.   The total Length of 1200 mm pipes given in the Pipe schedule (SMSTL-DD-5000)  is not matching with the Bill of quantities . Please clarify if the Bidder will be paid as lumpsum or as per the actual measurement of Pipe length?Answer: Please note that the contract of this RFQ is mussuring unit price  8.   The Drawings for the Main Chamber-1 and Main chamber -2 shows GRE lining to be carried out on the internal surfaces of the chambers. However, this is not mentioned for manhole drawing. Please confirm that GRE lining is not required for manholesAnswer: Please refer to the RFQ technical specification and BoQ  

New clarification added: Question 35 : 35.1. Technical notes and inquiries : The pipeline (Dia.1200mm) cannot be connected between Existing Manhole 2 and Main Chamber 2 because of the existed and connected pipeline (Dia.1200mm) between Existing Manhole 1 and Existing Manhole 2 in the same connection face side (same hole), also because the hole does not accommodate or fit the two pipelines of this diameter in the same time..We draw down all above matter in a drawing sheet for more understanding with the solution but we couldn't upload her with the written inquiry because there is no choose or botton for attachments. The solution in the our drawing sheet is to change the location and shape of the Manhole which can contains the old and new pipelines.kindly, we are seeking your advice on that matter since it is very important and difficult to implement as came in your drawing but we really have a solution for that issue which mentioned above and which is in our created recommended drawing sheet that we couldn't upload here. (We really hope if you can clarify us how to upload our recommended drawing sheet which definitely will show you the solution accurately).Answer: Please note that this tender is according Fidic Red Book no designs are required from the bidder, However, the RFQ is unit measuring price.35.2. To accommodate the two pipelines A & B to be implemented, the location of the assembly manhole Main Chamber 2 must be modified or changed as shown in the new drawing and changed the shape of it from circular to a shape that can accommodate or fit the previously executed pipelines and the pipelines required to be executed.Answer: Please note that this tender is according Fidic Red Book no designs are required from the bidder, However, the RFQ is unit measuring price.35.3. In one of the meetings, one of the questions was answered that there are no conflicts between the old network and what will be implemented. We noticed the following:35.3.A. The G.R.P sewage line heading from Sheba crossroads (the sewage line executed by the Chinese company) is currently obstructing and out-crossing the path line of the pipelines that will be implemented between Manholes A7 and A8. Thus, it is necessary to add a manhole to avoid the any cutting out or out-crossing in the pipelines and connect it to the network.Answer: Please note that this tender is according Fidic Red Book no designs are required from the bidder However, the RFQ is unit measuring price.35.3.B. The old sewage line, which is crossing the AL-Saylah from the West side to the East side, shown in the drawing No. SMSTL-DD-6010 (SHEET10 of 13) is obstructing and barriering the paths of pipelines A and B, and this sewage line is made of Asbestos with a diameter of 900 mm. Thus, it is necessary to add a Manhole and pipes of 900 mm diameter to slove the matter. But in that case no pipes of 900 mm diameter is included in the tables of quantities.Answer: Please note that the current RFQ 1st phase  is fixed and identified from CHAMBER-2A MH-46A and from CHAMBER-2B to MH-47B, However, the RFQ is unit measuring price.35.3.C. Pipeline B at the point of “Shu’oub Bridge” is passes in the same path of the old existed sawage line. Thus, the path of Pipeline B must be changed, so that the Pipeline can passes through the bridge’s medial opening or slot.As well, with an explanation if there are any connection works from the Manholes around and under the bridge to put in consideration for connecting them to the network and how they are connected, as well as the rest of the bridges.Answer: Please refer to the RFQ -Drawing - profile.  35.4. At the curves in the AL-Saylah path, the Manholes must be redistributed based on the reality and some Manholes must be added to avoid any interventions or works under the walls of the AL-SaylahAnswer: Please note that the current RFQ 1st phase  is fixed and identified from CHAMBER-2A MH-46A and from CHAMBER-2B to MH-47B, However, the RFQ is unit measuring price.35.5. The illustrated sketch attached to the bridges in the documents does not contain details and information explaining the bridge sections, their foundations and their levels. Please provide us with the executive drawings of the bridges and their foundations in the path of site-work to know their depth to ensure that they do not obstruct or block the paths of the line.Answer: Please refer to the RFQ  drawing . 

New clarification added: Question 33 : Can you provide us with profiles of existing sewer line ?How thickness of all types GRP pipes ?Answer: Please note that the existing Asbestos pipe  for the  specification please refer to the RFQ  design report.  And the new line route of new line laying far from the old line route Question 34 : According to profiles attached for new sewer line  GRP pipes ( dia 1200mm) the quantity is 4730 m & in BOQ 5148 m , therefore it is necessary to add new manholes to cover the quantity 5,148 .Answer: Please note that the current RFQ 1st phase  is fixed and identified from CHAMBER-2A MH-46A and from CHAMBER-2B to MH-47B, However, the RFQ is unit measuring price. 

New clarification added: Question 32 :32.1. As per  Pre-Bid MOM /Section B2 / Q-. 2 , the Bidder can not have any drawing for underground utility services. Therefore , please confirm that any additional work executed by Bidder  for protection / relocation of utility services like electrical cable , water line etc. (which would only be visible after excavation ),   would be considered as change order and contractor shall be compensated accordingly . Answer: Please refer to the RFQ  condition and specifications. 33.2. As per Pre-bid MOM / Section-B3/  Q-1 &2 :  It has been made quite clear that the work will be done during the winter season and in no case any work will be done during the rainy season . It has also been made clear that the weather forecast will be continuously monitored and work will be stopped in case of any forecast of flush flood ( for a week or even month ) . However , the liability  of damage incurred during any such heavy rain or flush flood is still not clear . For example , flush flood could occur before completion of the work due to following reason :33.2.a. Untimely rain during the winter working time. Answer: Please refer to the RFQ condition  and the Environment and social management plan( ESMP) mitigation measures.33.2.b. If the work is not complete for any reason during a single winter season , the job would have to be stopped and left during the   rainy season . It will resume again in the next winter season .In  both of the above cases , the flush flood may cause extensive damage to the non -completed work , despite all mitigation measures from Contractor to protect the half done work . If this happens , please confirm that  the re-work to be done during resumption of the work will  be considered as a FORCE MAJEURE event / EMPLOYERs RISK. Answer: Please note that we plan to finalize the work within one season, we expect from you to do the best to  achieve that . 32.3. As explained in tender , the existing Asbestos Pipeline is in very bad condition . If , after excavation for new GRP lines  and taking all protective measures to keep the existing asbestos pipe operational , it is found that the existing Asbestos pipes are damaged and sewer water is leaking / flowing out , please confirm that  the additional work to arrest that leakage or any other measure to keep the existing asbestos line  operational shall be considered as a change order and bidder shall be compensated accordingly . Answer: Please refer to the RFQ condition and BoQ  , the ESMP ,in  which is clearly the responsibility of each party stated  .32.4. Please provide the contact details  of  local partners for arranging Site Visit. Answer:  Urban Water Supply and Sanitation  Project  Implementation Unit   UWSS-PMU  contact Eng.Zide Aboutalib  Phone number: 00967 777710934 Eng.Mohamed Almaqdami Phone number :00967  770904040

New clarification added: Question 30 : We would like to know when the date of the site visit? Who is the focal point that we can contact with for the site visit? Could you please provide us with the name and number? Answer : please contact the following: The information for UWS-PMU  contact Eng.Zide Aboutalib Phone number: 777710934 Eng.Mohamed AlmaqdamiPhone number : 770904040

New amendment added #6: This amendment was raised to upload the following documents:RFQ/2022/42136 - 2nd Pre – Bid Meeting Minutes.

New clarification added: Question 26 : according the Annex 19 - Drawings_Par2-/FOUL SEWERPROFILE & SEWER , PIPE SCHEDULE -page 36 that the total length for the two main lines all the two lines start from station 600-1- from MH-46A   to CHAMBER-2A toMX1 = the total  length =2348.5 total of new MHs =462-rom MH-47B   to CHAMBER-2B toMX2 = the total  length =2380.60& total of new MHs =47that mains the total length =4728.66the total number of ne manhole =93from station main chamber 1 to station 600 out of phase 1 this is more than 1230 m if this is under the scope of the works of the contract or not please confirm that this is the whole quantity for phase1if the contract extend to another phase please provide us with all requirement drawings and with update qtys the same is for the main chamber NO 1 which is not shown in drawings if it is not included to be implemented why it is in bill boq .Answer : Please note that the current RFQ 1st phase  is fixed and identified from CHAMBER-2A MH-46A and from CHAMBER-2B to MH-47B, However, the RFQ is unit measuring price.  Question 27 : The second Pre-bid meeting on 19th  June  starts from 11.30 Yemen time . Right ? Answer : Yes.Question 28 : We would like to inform you that we have participated in the meeting by Eng. Mutahar AlghabryAnswer : Well noted.Question 29 : We noticed that MAIN CHAMBER-2 in SMSTL -DD-7005 and SMSTL -DD-7004The internal height is 2.071mThis height is not logical for a room of this size and there is also inside itWe also know that the depth of the manhole MH-A-01 is 2.302m and the depth of the manhole MH-B-01 is 2.212mAnswer :Please refer to the RFQ condition  and specification , as for the project it is a twins line . 

New amendment added #5: This amendment was raised to extend the RFQ deadline until 21-Jul-2022.

New clarification added: Question 25 : We didn't attend the first meeting and we will attend the 2nd meeting and the site visit can we participate in the tender? Answer: Kindly know that pre bid meeting in mandatory and still you can attend the 2nd pre bid meeting to be qualified.

New clarification added: Question 24 : Due to the complexity and large size of the project which requires more time for planning, we would like to request an extension for submitting the bid for at least 2 weeks. We hope that our request will be considered and looking forward to a fruitful cooperation with you.Answer: An amendment will be published soon.

New clarification added: Question 23 : Is the project partner mandatory?  Where it was stated in the document checklist that the document 0.3 Joint Venture Partner Information.Answer: Yes , for the international company. And taking into consideration the  complexity and size  for this  project , we encourage the local contractors to apply for this tender as Joint Ventures.

New clarification added: 22.2. Bi-pass lines constructed in 2017:In the note of Bill -1 of BOQ, it is stated that “Demolish & disposal of constructed Old-line-bypasses constructed parallel to SMSTL, these bypasses have been constructed after 2017 to solve problems with old existing lines left and right of Saylah. It is the responsibility of the Contractor to acquire details about these bypasses. Work covers only bypasses lines & Manholes intersecting or obstructing SMSTL works descried in any of this Tender Documents. In addition, works include excavation, single size backfills, c15 concert encasement for the intersection of remaining bypasses and SMSTL, hauling & disposal.None of the documents furnished with the e Tender provides any length of this line likely to be encountered within the laying path of new 1200 DN GRP pipeline.  Therefore, it is impossible for any bidder to acquire detail about this bi-passes at this stage. As such Bidder requests to consider this item as unit rate and payable as per actual measurement.Answer: This is to confirm no item as unit rate except those mentioned in the BoQ , and the bidder price shall include any unforeseen works.  UNOPS constructed  Old-line-bypasses in parallel for around 170 meter. 22.3. Native file for Manhole and Pipe Schedule:Please consider providing the Excel / word file for the following Pipe and manhole schedules. This  would help us for quantity calculation. a.   SMTL-DD-4000b.   SMTL-DD-5000c.   SMTL-DD-5001d.   SMTL-DD-5002e.   SMTL-DD-5003Answer: Please refer to the RFQ document .

New clarification added: Question 21 : 21.1. Start / end point of Pipelines and integration of New Pipeline with existing systemThe Bidder is confused regarding the start/ end point of the new Pipelines and method of integration of new piping system with existing one. Corelating with given documents / drawings the Bidder understands the following:The Work for new 1200 DN pipeline laying, and new manhole construction should be started from Main Chamber -2 and proceed towards upstream side. However, the connections from existing manholes to new 1200 DN pipelines would be blocked during this time. The sewer system consisting of old asbestos pipes and manholes will remain operational. If any existing pipe and or manholes are to be dismantled, Bidder needs to maintain pumping / Bi pass facility. Meanwhile, a connection   between the existing manholes (upstream and downstream to the foul sewer chamber) should be made to bi-pass the foul sewer chamber ( RP-4) . Then the chamber should be demolished.   Parallelly, Main Chamber -1 should be constructed. The Upstream inlet pipe opening in the chamber should be in blocked condition (future pipeline is planned)  The 1200DN new pipelines will be continued till Main Chamber -1. Renovation / lining of old manholes shall be taken up by local isolation / pumping method. Once all the above activities are finished, the blocked connections from existing systems to new manholes (see point -2 above) shall be removed and thus the new system will be commissioned. This new system will carry all effluents of the area between new manhole MH-A-46 / MH-A-47 to the Main chamber -1 The existing sewer system will still collect effluents from the area between Main chamber -2 to Existing manhole MH-A-11 and MH-B-10 (erstwhile Foul sewer chamber area) and then carry the effluent to the new pipe system downstream through the bypass line described in step -c above.  Please confirm if Bidder’s understanding above is correct.Answer :  Please note that the work will start from Main Chamber -2 and proceed towards the upstream side. Since the route of new line laying far from the old line route , therefore section by section in sequence  the connection between the existing manhole and new manhole will be done once the new section is complete.

New clarification added: Question 20 : Could you please advise us by which the way we can send our representative`s name who will participate in the meeting.Answer : Kindly know that the 2nd pre bid meeting will be tomorrow and we will inform you on the way , also you can contact the following:The information for UWS-PMU  contact Eng.Zide Aboutalib Phone number: 777710934 Eng.Mohamed AlmaqdamiPhone number : 770904040

New clarification added: Question 15: Notes for Main Room (No. 2):The internal height of the main room (No. 2) is 2071 mm, which is shown on drawing board No. SMSTL - DD-7003. This height, from our point of view and experience, is not proportional to the room's size and purpose, and also not proportional to the volume of incoming and outgoing flow. Kindly, need your advice on that.Answer: Please refer to the RFQ technical specifications.  Please provide us with sections and drawing of the benching work for the main room (No. 2) in the places of entry and exit of the pipes.Answer:  Please refer to the annex 19 part 2  page 57-59In the drawing sheet [No. SMSTL - DD-7005], it shows that the concrete section around the pipes is equal to the height of the entire main room (No. 2) with its entire perimeter. Thus, it looks that the room (No. 2) became an internal concrete room with a thickness of 35 cm and surrounded by another external concrete room with a thickness of 50 cm and with the same height as the entire main room (No. 2). Please confirm that or modify it…Answer : Please note the sheet SMALL - DD-7005 explains 4 different detailed - REINFORCEMENT DETAIL AT CORNER- OPENINGS IN WALLS REINFORCEMENT DETAIL- Section B-B  for DD_7005 - Section A-A  for DD_7004 Question 16: The paving rows of Al Saylah stones are in fact with a width ranging between 22-25 cm. But unfortunately, on the drawing sheet [SMSTL-DD-8001], you stated the width is 30 cm, and this does not match the implemented reality in the site for the previous work, and the length of the stones, in reality, is not less than 20 cm and some of them exceed 30 cm, in order to achieve interconnection between them as achieved in a long with all path of Al Saylah. Thus, it is preferable to re-characterize the section of stones as Shabami stones “which are used already in the other sections of Al Saylah path” by the width of 22-25 cm, a length of not less than 20 cm, and a thickness of 25 cm which helps to ensure strong interconnection.Answer: Please refer to the RFQ/ Section IV/ Schedule -2/ 2.0 Bullet point 5.  Question 17 : Filling the joints for the Al Saylah floor between the paved stones on the drawing sheet [No. SMSTL - DD – 8001] of asphalt, while in fact the implemented in all paved stones works of Sana’a is a pile of cement rubbish (liquid cement). Kindly, confirm and clarify.Answer: We confirm that the reinstatement will result in no change in the current situation. Question 18 :  On the drawing sheet [No. SMSTL-DD-8001], the reinforcement steel iron of the concrete slab for the Al Saylah bottom is not shown or given, and what is shown is the connecting iron between the new concrete slab with the old concrete slab in the section table point No. 7. kindly, provide us with the slab reinforcement steel details…Answer:  Please note that point No. 7 is connecting iron between the new concrete slab with the old concrete slab while the slab reinforcement is under the reinstatement ( Mesh Ǿ12@20 cm, 2 LAYERS)Question 19 :  The drawings did not indicate the location of the main room (No. 1) mentioned in the schedule of quantities, item No. 3, paragraph a. kindly, provide us with the exact location of the main room (No. 1).Answer:  Please note that the main chamber No.1 is not part of this phase .

New clarification added: Question 5: RFQ/ Section II / 2. Qualification Criteria / point -5.The clause states that the Bidder should have “  ….the registration under the category/grade 1st in the body that governs and regulates the construction industry in the Country” . Please confirm that it is not applicable for Foreign Companies.  Answer: please note that it should with their local agent or representative.Question 6 : RFQ/ Section IV/ Schedule -1/ 1.1 / 10.2 , The tender does not provide any advance payment. Please note that a substantial cost for the Project is manufacturing and supply of GRP Pipes. This amount needs to be paid to the supplier in advance. Therefore, bidder requests to reconsider this clause and allow 20% interest free mobilization advance based on bank Guarantee.Answer : Advance payment not allowed. Question 7 : RFQ/ Section IV/ Schedule -1/ 1.1 / 10.2  In two consecutive clauses the retention money is shown as 5% and 10%. Please confirm that the retention amount is  5%.  Answer: please note that  the retention amount is  10%.   Question 8 : 4RFQ/ Section IV/ Schedule -2/ 2.0 Bullet point -1 , The total length of 5150m for 1200 DN pipes includes 2 lines of pipes. That means each pipe line would be approximately 2575 m long. Kindly confirmAnswer: Please provide as it is included in the RFQ - documents.Question 9 :  5RFQ/ Section IV/ Schedule -2/ 2.0 Bullet point 4. Please conform that Contractor can use the dismantled stones for construction of new pavement.Answer :  Please note that this is Bullet point 5. and we request you to read the requirement again quote "Reinstatement. Paving or Asphalt reinstatement of the road to match existing levels using the same as existing stone type color, pattern, and dimensions."Question 10 :  RFQ/ Section IV/ Schedule -2.2/ 5.0 , Please confirm that area for Bidder’s site facilities shall be provided by the employer.Answer: No, UNOPS gives the contractor flexibility to arrange the location for the Contractor’s Site facilities including storage, accommodation, and work areas, under the engineer's instructions. Question 11 : RFQ/ Section IV/ Schedule -2.2/ 7.0 , We could not find referred clause 14.17 in the General Conditions. Please confirm that dismantled Asbestos pipes are allowed to be disposed in this area.Answer: Please refer to the condition  mention also in  annex  17 and annex 18 in this regards Question 12:  RFQ/ Section IV/ Schedule -2.2/ 8.0 , We could not find referred clause 14.14 in the General Conditions. Kindly confirm that Peripheral Security for the entire project Site shall be provided by Employer.Answer:  Please refer to  clause  4.14 Security of the Site. Question 13 : RFQ/ Section V/ Schedule -3.4/ 10.3 , As the value of the GRP pipe is significant. Please consider keeping provision for payment on supply this GRP pipe.Answer: Please provide as it is included in the RFQ - documents.Question 14: RFQ/ Section V/ Schedule -3.11 , No value of  various insurance have been shown . please provide .Answer: Please note this is required after awarding .

New clarification added: Question 4 : Correction for the previous email. In the inquiry point No. 1, the paragraph number is (2 a) not (9-2).Answer: Well noted  

New clarification added: Question 3 : Question 3.1: In the bills of quantities, item No. (2) for the Manholes, paragraph No. 9-2, shows that the precast Manholes of a diameter are 1800mm “which means that from the previous sentence the Manholes are circular in shape”. And according to the illustration sheet number SMSTL DD 8002, it shows that the Manholes are E type which are poured on-site and not precast (as came in the BoQ), and there are two types of them, one is rectangular and the other is circular. Kindly, explain whether the Manholes are pre-cast OR poured on-site? And are they circular in shape from type E OR rectangular with illustrating the parts for the Manholes and the reinforcement bars works details in case it is pre-cast because the drawing sheet mentioned above is for Manholes which were poured on-site not the pre-cast?Answer: Please refer to the drawing number SMSTL_DD_8002  manhole type E circular. and the Manholes are CAST IN SITE  as shown in the drawing. Question 3.2 : The deadline on July 3, 2022 AD for submitting the tender offers which posted on your website is not adequate to study a project such as that huge and size, and we suggest that the total study period should be not less than two months.Answer: An amendment will be published soon.Question 3.3 :  Please explain the cutting process of the reinforced slab which is under the paved stones with the liquid bottom of the path. Is the slab should be cut completely (with concrete and steels iron)? If yes, how the old slab concrete will be connected with the new slab concrete. Please explain with detailed illustrations.Answer: Please refer to the annex 19 drawing part 2 -SMSTL- DD-8001 in the row   No. 7 is connecting iron between the new concrete slab with the old concrete slab while the slab reinforcement is under the reinstatement ( Mesh Ǿ12@20 cm, 2 LAYERS)Question 3.4: Please provide us with the exact location of surveying Benchmarks with the coordinates.Answer: Please refer to  Annex 19 - Drawings_Part2 page 9 for Control PointsPlease refer to  Annex 19 - Drawings_Part2 page 33 to  39  for the PROPOSED FOUL SEWER MANHOLE SCHEDULE. you can find in this table the coordinates ( EASTING, NORTHING).Question 3.5 : Performance guarantee: (performance security amount). It was mentioned in the bidding documentsSection II (Evaluation method and criteria), schedule 1 Sub-close No. 4.2, Item 1.1 - The value of the performance guarantee shall be 10% of the value of the contractor's bid , While it was mentioned in the Evaluation criteria, stage: qualification criteria, Item No.1 - The value of the performance guarantee is 5% of the value of the contractor's bid , Please specify the value of performance guarantees.Answer: please note that The value of the performance guarantee is 5% of the value of the contractor's bidQuestion 3.6 : Bid Security : (Bid entry guarantee )The documents did not specify the value of the bid guarantee (entering the tender) Please specify the value of the bid guarantees.Answer: Please note that there is no required bid guarantee.

New amendment added #4: This amendment was raised to update the time of the 2nd Pre – Bid Meeting.

New amendment added #3: This amendment was raised to upload the following documents:RFQ/2022/42136 - Pre – Bid Meeting Minutes.Also to add the following to the Checklist of documents to be submitted by vendors:Mandatory - Company Organogram ChartYEMEN Project site SEAH risk checklistPriority_ Sexual Exploitation and Abuse (SEA) and Sexual Harassment (SH) Prevention and Response Action Plan Template for ContractorsThank You,

New clarification added: Question 1 : Can I have the pre bid meeting docx ?Answer : Yes , RFQ/2022/42136 - Pre – Bid Meeting Minutes will be published soon.Question 2 : The Tender specifies that a mandatory  tender meeting would take place on 12th June 2022  which has  already passed . However , we received the  tender today .  We are extremely keen to participate in this tender .  Therefore , kindly inform me if the meeting has already taken place . If it has , we would request you to kindly arrange for another alternative meeting  so  that we can participate .Answer : Please note that since the pre bid meeting is mandatory and you have already missed the meeting , a RFQ/2022/42136 - Pre – Bid Meeting Minutes will be published soon.Also please note that you can attend the 2nd pre bid meeting dated on 19-June-2022.

New amendment added #2: This amendment was raised to upload the following documents:Small Works - 6 Solicitation - RFQ 02 Particulars - Amendment 12-June-2022 .Priority_ Sexual Exploitation and Abuse (SEA) and Sexual Harassment (SH) Prevention and Response Action Plan Template for Contractors .YEMEN Project site SEAH risk checklist .Also to add the rquired link of the  Mandatory 2nd Pre - Bid meeting RFQ/2022/42136.Mandatory - Company Organogram Chart.

New amendment added #1: This amendment was raised to upload the following documents:Annex 01 .2  Bill of Quantity_Amendment_08-Jun-2022.Final- SMSTL -Design Report .

New clarification added: Tender title: Rehabilitation of the Main Sewer Line Network of Al Saylah in Sana’a City , Replacement of 6.5km transmission line ( 5148m). Dear Bidders,Kindly know that an amendment  will be published soon for the Annex 01 .2  Bill of Quantity_Amendment_08-Jun-2022.Best Regards,