23_237_ADD1_1.pdf

CERTIFIED MAILED/EMAILED

TO: All Vendors Tywanna Scott, Procurement Assurance Analyst Hameed Malik, A usta E ineering an Environmental Services Department

FROM:

DATE:

Geri A. Sams Procurement D1rec or

December 7, 2023

SUBJ: New Bid Opening Date and Responses to Vendor's Questions

BID ITEM: Bid Item #23-237 Deans Bridge Rd MSW Landfill Phase 3 Gas Collection & Control System Expansion for Augusta, GA - Augusta Engineering and Environmental Services Department

NEW BID OPENING DATE: Tuesday, December 19, 2023@3:00 p.m.

ADDENDUM NO. 1

This Addendum shall form a part of the referenced Bid Item #23-237 Deans Bridge Rd MSW Landfill Phase 3 Gas Collection & Control System Expansion and any agreement entered in connection therewith equally as if bound into the original document. Acknowledge receipt of all Addendums on Attachment "B" within the Specifications package.

The Bid Opening Date for Bid Item #23-237 Deans Bridge Rd MSW Landfill Ph 3 Gas Collection & Control· System Expansion for Augusta, GA - Augusta Engineering and Environmental Services Department has been changed:

From: Monday, December 11, 2023@3:00 p.m.

To: Tuesday, December· 19, 2023@3:00 p.m.

Responses to Vendor's Questions:

1. Question: Can a copy of the Bid Specifications and Bid Form be provided in a clearer file. It appears that the specs provided by Augusta blue are a scanned copy.

Response: PDF copies of the Bid Specifications and updated Bid Form attached.

2. Question: Please verify that this project is Tax 'EXEMPT'.

Response: The Owner's Tax-Exempt status will not transfer to the Contractor. The project is not Tax-Exempt.

3. Question: Is an up-to-date Georgia state contractor's license required at the time of the bid submittal?

Response: General Contractor License with ability to perform work in Georgia State is required.

4. Question: Section 01 10 00 - Summary of Work, subsection 1.03 Work Sequence shows that the work in Cell 3A by January 15, 2024. This would include drilling wells and installing header/lateral, air, and liquid lines from wells in Cell 3A thru Cell 2A, and to tie-in location within Cell 28;

approximately 1,600 LF of trenching. Given the December 11 bid due date, the holidays, contract award/review/signing, bid submittals, Contractor prepares and submitted Shop Drawings {section 33 51 10), material testing, material approvals, material lead time {after approvals), etc. it will be unlikely that the time for all of this will allow for a January 15th deadline. Can the site apply for an 'extension' on the compliance of the Cell 3A work???

Room 605 - 535 Telfair Street, Augusta Georgia 30901

(706) 821-2422 - Fax (706) 821-281 l

Register at www.demandstar.com/supplier for automatic bid notification II[!] Scan thh; QR code with your '1~· • smartphone or camera equipped . • tablet to vIs1t the Augusta, Georgia

Addendum 1 Bid Item #23-237 Deans Bridge Rd MSW Landfill Ph 3 Gas Collection & Control System Expansion Paae 1 of 14

Response: The facility is looking to start the work in January, scheduling and production constraints can be addressed during the NTP/kick-off meeting.

5. Question: Given the benefits of Foam Seal over bentonite, is Foam Seal an approved equal to Bentonite for the wells plugs, pipe abandonments, and horizontal collectors (details 1/5, 2/7, 7/7, 4/11 )?

Response: Expanding foam seal is an acceptable alternative to the bentonite specified in the Technical Specifications. Contractor shall provide material specification sheets as submittals for the selected foam.

6. Question: Should 'Sweep' 90* Elbows be used on the Liquid Conveyance risers?

Response: Refer to Note 9 on sheets 3A and 38.

7. Question: QED pump called out on detail 1/6 for the dewatering wells, but PumpOne pump called out on detail 4/11. Can PumpOne pumps be used in the dewatering wells?

Response: The facility prefers QED pumps and parts for continuity and to match with existing infrastructure. Contractor shall provide submittals for Engineer's review and approval.

8. Question: Are E-fuse couplings and branch saddles acceptable for tie-in to existing pipes?

Response: Electro-fusion couplings are acceptable for tie-ins. Contractor shall provide a submittal with the product and approach for the tie-ins for the engineer's review and approval.

Branch Saddles are not acceptable.

9. Question: Is SS tubing an acceptable alternative to Polypropylene tubing for the Monitoring Port detail 5/7 to ensure the tube stays in the middle of the gas stream and to provide longevity over plastic tubing?

Response: SS tubing will be acceptable. Contractor shall provide a submittal with their installation approach for the Engineer's review and approval.

10. Question: Is there text/wording being covered up by the engineer's stamp on the top right of sheet 9?

Response: No text is covered up by the Engineer's stamp. The multileader is pointing just above the text.

11. Question: Given the large amount of money in materials on this project, can delivered and onsite stored onsite be billed prior to installation?

Response: Augusta is open to consider allowing material allowance for such purchase of material. However, contractor will be responsible for material QA/QC. Material conformity to specification will be verified at the time of installation. Damaged material shall be replaced with new one; repairs are not acceptable. If there is surplus material at the completion of work, Augusta will not take that material and advance payment will be credited back to the project.

12. Question: Can you please provide a list of these suppliers/companies who are familiar with the Site and/or who have been used on previous projects:

a. Surveyors

b. Gravel Suppliers

c. Seeding Company

Response: The Site does not have preferred vendors for the above listed services. The Contractor shall select competent suppliers/vendors for the project, following the requirements in the technical specifications for all installations. Please refer to the information below:

Previous GCCS Surveyors: Southern Land Surveyors Gravel suppliers: The site purchases rock from Martin Marietta Local Quarry. The rock procured for this project shall be non-calcareous as specified in the technical specifications Seeding Company: No past information available for vendor

13. Question: Based on how the specs read on how the Engineer must approve most of the work before completing (i.e. backfilling trenches, tie-ins, etc.), will the Engineer be available 'DAILY' to approve work so as NOT to delay the productivity of the Contractor? 1251030

Addendum 1 Bid Item #23-237 Deans Bridge Rd MSW Landfill Ph 3 Gas Collection & Control System Expansion Paae 2 of 14

Response: The Engineer/Owner will have a full-time construction oversight during the project.

The daily construction progress can be discussed with the project team.

14. Question: Per Section 4: Agreement - for the $2,000 /day fine for unapproved construction activities in excess of 14 days, is this consecutive or non-consecutive work does? Does this apply to non-work days due to weather and/or delays caused outside of the contractor's control?

Response: This is for consecutive days but repeat offences shall not be tolerated. Fine will not apply to Weather or similar cause delays.

15. Question: Payment terms: how many days after submitting an invoice will the invoice be paid?

Response: Approved invoices are paid within 30 days of the invoice approval date (not submittal date).

16. Question: Besides the GA state contractor license and Augusta business license, what other 'permits/licenses' are required?

Response: Any specialty work will require applicable licenses. Bidder must be licensed in the Governmental entity for where they do the majority of their business. Your company's business license number must be provided on Page 1 of Attachment B. If your Governmental entity (State or Local) does not require a business license, your company will be required to obtain a Richmond County business license if awarded a contract.

17. Question: Section 31 20 00 - Excavating, Trenching, Backfilling, and Grading - Subsection 1.05 Submittals - Part E D Is the 'proposed stationing and pipeline identification procedures' a 1 time requirement as an example for all header and laterals, or required on every header and lateral?

Response: Contractor to provide example stationing and pipeline identification prior to conducting the pre-construction survey. As-built and preconstruction survey would include stationing and pipeline identification data on all piping.

18. Question: Section 31 20 00 - Excavating, Trenching, Backfilling, and Grading - Subsection 1.05 Submittals - Part E D Site provided clean soil backfill material, as a one-time estimated quantity for the entire project acceptable or is a weekly estimate required?

Response: Contractor shall provide an estimate of clean soil quantity needed at least 14 days prior to the requirement, including any changes/increase to the required quantity.

19. Question: Please explain in further detail how the Contractor is supposed to 'Certify' site soils and excavated soils for reuse in regards to Section 31 20 00 - Subsection 1.05 Submittals - Part H.5 and Section 2. "Certification that the soil is not petroleum-contaminated or contaminated with other chemicals or compounds that may be deemed hazardous or harmful to human health and the environment." Does the contractor have to submit soil samples to an independent laboratory for testing prior to utilizing onsite/excavated soils? If so, please provide the test specification required.

Response: Onsite soils are approved and expected to be available for use on this project and the above certification is waived for onsite soils. The above certification and testing only applies to new material that may be imported for use as clean soil backfill.

20. Question: Please verify that a trench Laser Level is NOT an appropriate 'survey equipment' that can be used to measure and document elevation and slope 'every 10-foot section' of pipe. If NOT, what survey equipment is considered acceptable and/or what data recording capabilities are requried?

Response: Trench Laser Level shall not be acceptable for as-built documentation/slope verification. As-built documentation and survey shall follow the requirements specified in the Technical Specifications.

21. Question: Section 31 20 00 - Subsection 3.10 - Testing Requirements During Placement D please list any 'historical' testing that was required on previous projects and provide the specification requirements so we can obtain pricing from testing laboratories.

Response: This is not applicable to this project.

22. Question: Section 32 90 00 - Seeding and Sodding, subsection 3.01 General Requirements □ please verify that the Contractor's 1 year warranty on their seeded areas do NOT warranty any disruption or damage to these areas causes by others, or damage from leachate/liquid outbreaks, washouts from rain events, or other such situations outside of the control of the Contractor.

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a. Also verify that reseeding/sodding of the disturbed areas will not Exceed that of current pre construction conditions.

Response: The contractor is responsible for maintenance of seeded and / or sodded areas until final acceptance from the Owner. Refer to Section 3.09 Final Acceptance under 32 90 90.

23. Question: Section 32 90 00 - Seeding and Sodding, subsection 1.02 Submittals, Part C □ please explain what is required for the 'certification of quality and warranty." on the fertilizer as we've never seen Fertilizer warrantied before.

Response: Refer to Section 3.09 Final Acceptance under 32 90 90.

24. Question: When will 'Final Acceptance' of seeding/sodding be given?

Response: Refer to Section 3.09 Final Acceptance under 32 90 90.

25. Question: Section 33 21 70, subsection 3.04, Part B- Joining of Pipes D are 'Caps' required on both ends of fused pipe stringers prior to installation, or is duct tape acceptable to keep ends of pipe stringers closed off?

Response: While duct tape will be acceptable, any silt or soil deposit and/or damage to the pipe during transport from welding/staging area to the trench will have to be repaired to Engineer's satisfaction at no cost to the Owner.

26. Question: Section 33 21 70, subsection 3.05, Part B - Well Backfilling D Asking for gravel to be placed in the borehole by 'bucket-poured' (assuming excavator/loader) and each # of buckets recorded at each well.

a. Is direct dumping from bed of haul truck not acceptable?

Response: No, to avoid rock from "bridging" during backfill. Bucket-pour is the preferred method.

b. Also, is the recorded depth of the gravel backfill on the drill logs sufficient record tracking in lieu of the # of buckets given that bucket size varies for each piece of equipment?

Response: Contractor shall confirm the rock depth to meet the design depth for respective well(s).

27. Question: Section 33 21 80, subsection 3.02, Part A.4- Field Quality Control □ Asking that the Pump Manufacturer provide a written statement stating their equipment has been properly installed and started up. The only way the manufacturer will provide this information is to have one of their technicians onsite to physically verify this. Are you requesting the additional cost be included in our pricing to account for this written statement?

Response: The owner requires the contractor to provide confirmation as a written statement that the pump has been installed adequately such that it is operating/stroking and observed to be in continuous operation. This shall be communicated to the Engineer/owner for verification.

28. Question: Please provide a copy of a historical Contractor prepared Shop Drawing (per subsection 1.02) showing (as an example) all of the requested information need to be on this drawing:

dimensions, slopes, invert elevations at connections, tie-in depths, pipe dimensions, pipe and fitting size.

a. Also, how are we supposed to 'field-verify' tie-in depths and pipe sizes on the Shop Drawing when the Shop Drawing is required prior to the 'commencement of construction'?

i. Are you requesting that all tie-in locations be Surveyed, Exposed, Examined, Documented, and

Backfilled in order to obtain this information?

Response: For GCCS features that require submittal of shop drawings, these shall be submitted for review prior to installation of said features. If field verification is required for tie ins, contractor shall coordinate with the Engineer/Owner for as-built data, and complete investigations prior to submitting shop drawings.

29. Question: Please confirm you are requesting the gas pipes to be of ASTM D 2513 which is of higher cost for the standard ASTM F714 and D3035 ... which consists of 1 extra test commonly only used in Natural Gas applications.

Response: As per the technical specifications, the pipes utilized for gas flow shall be manufactured to meet the requirements of ASTM D 2513.

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30. Question: Section 33 51 10, Subsection 3.02, Part DD what are the testing requirements for 'destructive testing of any fusion weld on HOPE pipe', so we can obtain laboratory pricing for this?

How many tests are anticipated for this scope of work?

Response: Destructive testing shall be conducted at the discretion of the Engineer/Project Manager on an as required basis. The CQA/Engineer will notify the contractor of such a requirement during the project and will evaluate a path forward with the contractor.

31. Question: Section 33 51 10, Subsection 3.08, Part B D please verify that you want 'hot dipped galvanized' studs and nuts, NOT Stainless steel.

Response: Contractor to assume use of hot dipped galvanized nuts, bolts, and washers as per the Technical Specifications. Proposed alternates may be reviewed by the engineer after award of contract.

32. Question: Section 33 51 10, Subsection 3.08, Part D D please specify what hours of the day that pipe pressure tests are NOT allowed to occur.

Response: No testing will be allowed during the middle of the day (typically between 11 am and 2pm) or when pipe segments are exposed to sunlight/ high temperature differentials, as described within the Technical Specifications.

33. Question: Please verify that Hydrostatic pressure testing is required.

Response: Installed piping shall be pressure tested pneumatically as per the Technical Specifications.

34. Question: GC-13 Inspection & Testing D Please list any additional 3rd party testing that the Engineer has/may request so we can incorporate those costs into our bid.

a. Also, verify that the Contractor is NOT responsible for providing a 3rd party Quality Control &

Quality Assurance company to oversee labor installation.

Response: Contractor is not responsible for providing a 3rd party Construction Quality Assurance company to oversee installation.

35. Question: Please verify that soil compaction utilizing the excavator bucket is enough to meet the compactions requires; that dedicated compaction equipment is NOT needed.

Response: Correct. Contractor shall provide multiple checks to Engineer's satisfaction to confirm the soil and all other backfills have been uniformly installed per respective well's designed depths.

36. Question: Are the liquidated damages outlined in the Agreement cumulative?

Response:Yes

37. Question: Section 32 90 00 mentions that sodding is required for parts of the project. If sodding is required, will a bid item be added for measurement and payment of sodding?

Item 025 on the Measurement and Payment Form includes 'Seeding and Erosion Control Matting' Response: Contractor shall use either seeding with erosion control matting or sod, in areas with preexisting grass that is disturbed as a part of the construction and is not less than 2 years old, with the exception of stockpile and borrow areas. The seeded/sodded areas shall be free of weeds and undesirable native grasses. Either of the methods can be selected by the contractor as a part of this construction and shall follow the requirements in the technical specifications, especially the final acceptance. Item 025 on the Measurement and Payment form can be used for pricing either of the selected methods. Contractor shall specify selected method.

38. Question: Confirm that the Owner will be responsible for the maintenance of seeded and/or sodded areas after the contractor demobilizes at the end of the project?

Response: The contractor is responsible for maintenance of seeded and / or sodded areas until final acceptance from the Owner. Refer to Section 3.09 Final Acceptance under 32 90 90.

39. Question: Section 33 51 1 O mentions that the pipe and fittings are to be provided from one manufacturer. This is not possible and this requirement should be waived.

Response: The Contractor may use fittings from a different manufacturer. However, Contractor shall provide fittings that meet all other requirements in the Technical Specifications including ASTM, SOR/Schedule, operating and maximum pressure rating, and

Addendum 1 Bid Item #23-237 Deans Bridge Rd MSW Landfill Ph 3 Gas Collection & Control System Expansion Paae 5 of 14 other relevant requirements. Contractor ~hall be responsible for ensuring compatibility between fittings and piping, and for replacing any incompatible fittings. Contractor shall provide submittals for the proposed pipe and fittings for Engineer's review and approval.

40. Question: Confirm that zinc-plated bolting hardware will be acceptable in lieu of the "stainless hot dipped galvanized studs and nuts"?

Response: Contractor to assume use of hot dipped galvanized nuts, bolts, and washers as per the Technical Specifications. Proposed alternates may be reviewed by the engineer after award of contract.

41 . Question: Confirm that epoxy coated ductile iron back-up rings will be acceptable in lieu of the specified "stainless hot-dipped galvanized, finished with blue primer, and epoxy coated"?

Response: Epoxy Coated ductile iron backup rings are acceptable.

42. Question: Augusta Engineering Department, GC-111, will project signs be required?

Response: Project Signs would not be required.

43. Question: Confirm that there is water available onsite for the contractor's use?

Response: Contractor shall use Non-Potable water from the facility pump

44. Question: The bid documents specify both a 12 month and an 18 month warranty period. Please clarify?

Response: Assume 12 months.

45. Question: Confirm that the pump and components for the horizontal collector sump will be measured and paid for under Items 020, 021, 022, & 023?

Response: Yes. Pump and components for the horizontal collector sump have been measured for under items 020, 021, 022, and 023.

46. Question: Will Horizontal Collectors HZ-18, 19, 20, 21, & 22 be constructed per the details on Drawing No. 9?

Response: Yes. Final installation conditions may vary to accommodate for field conditions at the time of installation.

47. Question: The perforated pipe for the slope, horizontal, and toe collectors is specified as being SDR- 9, SDR-11, and SDR-17. Please clarify?

Response: The horizontal and toe collector specifies the use of SDR 11 perforated pipe. See section view A-A for detail 4 on sheet 11 and detail 3 on sheet 12. Slope collector specifies the use of SDR 9 perforated pipe. See detail 3 on sheet 9.

SDR 17 shall only be used for the solid pipe sections of the slope, horizontal, and toe collectors.

48. Question: Item No. 39B, confirm that this price is for the piping and rock material only?

Response: Yes. Item No. 39B is for supplying piping and rock material for future extension/installation of the slope collector.

49. Question: The contract duration of 120 days is not sufficient to complete the scope of work and should be extended to a minimum of 210 days, but 240 days would be better to account for any possible delays.

Response: Assume substantial completion in 120 days. Contractor can work extended daily hours and over the weekend.

50. Question: Confirm that molded reducing tees will be acceptable?

Response: Molded reducing tees are acceptable in case of vacuum laterals/headers only.

Except for stub ups, contractors shall only use 90° sweep bends or 45° wyes with molded reducers, where applicable, for forcemain/liquid conveyance lines.

Contractor shall provide submittal(s) with proposed locations for molded reducing tees for Engineer's review and approval.

51 . Question: Confirm that either QED or PumpOne pneumatic pumps and accessories will be acceptable as there are notes specifying components from each?

Response: The facility prefers QED pumps and parts for continuity and match with existing infrastructure.

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Contractor shall provide submittals for Engineer's review and approval.

52. Question: For the installation of the sideslope collectors, what is the assumed thickness of the intermediate cover?

Response: Contractor shall either use on-site geomembrane as indicated in detail 5 on sheet 9 or utilize on-site geotextile with a cover backfill of trash from the active area mixed with clean soil. For the second option specified, contractor shall assume a thickness of 6" minimum backfill over the installed geotextile, such that the backfill grades tie-in to existing grades. Contractor to assume 12"-24" of intermediate cover.

53. Question: Due to the full stone backfill of the sideslope collectors, can an alternate bid item be added for trenches over 4' deep?

Response: Refer to detail 5 on sheet 9 for the trench depth for sideslope collectors.

54. Question: Both a QED Accu-Flo and a Quick-Change Orifice style wellhead are specified. Please clarify?

Response: The wellheads will be the 2" ORP215M models.

55. Question: Will dual extraction well caps be required for each new wellhead or only at each location that will receive a pump?

Response: All wells shall receive a dual extraction well cap.

56. Question: Will the handling of asbestos containing waste be considered a changed condition?

Response: The site does accept some asbestos. In case the contractor is to encounter this waste, they shall notify the site and engineers immediately and the path forward will be discussed.

The disturbed refuse that is suspected to be asbestos-containing material, shall be sealed in leak proof containers labeled "CAUTION-CONTAINS ASBESTOS FIBERS_ AVOID OPENING

OR BREAKING CONTAINER_ BREATHING ASBESTOS IS HAZARDOUS TO YOUR HEALTH"

and be disposed in a manner as to not disturb the waste integrity, and transported to the working face of the Facility immediately for disposal. The waste shall be buried with a minimum of twelve (12) inches of soil cover.

57. Question: Section 33 21 70, Paragraph 3.05C, a minimum of 6 bags of bentonite per 6" lift will result in a plug that is much thicker than 2'. Is the Contractor to provide the specified number of bags or the 2' thick plug?

Response: Contractor is to provide two (2) bentonite plugs of 2' minimum thickness each, hydrated every 6" lift, for every drilled well. Refer to detail 1 on sheet 5. Contractor shall provide the necessary number of bentonite bags to meet this requirement.

58. Question: Augusta Engineering Department, GC-84, will the Contractor be responsible for the NPDES monitoring and reporting?

Response: Yes.

59. Question: Augusta Engineering Department, GC-84, will the Contractor be responsible to submit a Soil Erosion, Sedimentation and Stormwater Pollution Control Plan?

Response: Yes.

60. Question: Augusta Engineering Department, GC-110, will the Contractor have to provide office space and facilities for the Engineer?

Response: No.

61. Question: Per the pre-bid meeting, confirm that the Owner's tax-exempt status will transfer to the Contractor for this project?

Response: The Owner's Tax-Exempt status will not transfer to the Contractor.

62. Question: Per Attachment B, please confirm that bids will only be accepted from Contractor's who have a Utility Contractors License at the time of bid submission?

Response: Utility License is not required.

63. Question: Will expanding foam be an acceptable alternative to bentonite?

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Response: Expanding foam seal is an acceptable alternative to the bentonite specified in the Technical Specifications. Contractor shall provide material specification sheets as submittals for the selected foam.

64. Question: Section 33 21 70, Paragraph 3.05D, will the requirement to rod the soil into the borehole be enforced as this is not typical?

Response: Contractor shall provide multiple checks to Engineer's satisfaction to confirm the soil and all other backfills have been uniformly installed per respective well's designed depths.

65. Question: Is the design engineering firm permitted to bid on this project?

Response: Yes.

66. Question: How many bollards are estimated to be needed for this project?

Response: Two (2) bollards shall be required per road crossing, as per detail 4 on sheet 8.

67. Question: Confirm that no waste will be allowed as trench backfill and all trenching will be backfilled with clean soil.

Response: Refer to details 1 and 4 on sheet 7. The trenches containing the pipelines shall be backfilled with clean soil free of refuse, with 6" minimum soil bedding.

68. Question: Will clean soil be available to the contractor at no cost from the onsite borrow pit? Or will the contractor need to import the clean soil for the pipeline backfill?

Response: Refer to section 31 20 00-4, 2.01 Clean Backfill Materials, Bullet D.

69. Question: Will it be the contractor's responsibility to peel back the geomembrane over the sideslope collectors when being filled?

Response: No.

70. Question: For as-built surveying, will it be acceptable to install survey risers along the pipelines every 50 feet and at all fittings so the surveyor can get the points after the pipeline trenches have been backfilled?

Response: Refer to section 013010-5 Contractor Submittals, 1.05 Record Drawings, Bullet B.

Survey risers can be installed as per specified requirements for the as-built survey.

71 . Question: Will any topsoil need to be imported for the seeding or sodding base layer or can the contractor use soil from the borrow pit?

Response: Contractor shall import topsoil for seeding/sodding as required per the technical specifications.

72. Question: Will the contractor need to weigh/pay for excavated waste before disposal?

Response: Refer to section 02 41 16-1. Contractor shall keep record of number of refuse loads hauled to the landfill working face and provide weekly disposal logs to the County representative. Weigh-ins/payments will not be required for the waste excavated as a part of this construction project.

73. Question: Will any tie-ins be deeper than 5 feet below ground level? If so, which tie ins?

Response: Based on available survey information, tie-ins shall not be deeper than 5-feet. If tie-in locations are deeper than 5- feet, contractor shall notify the engineer and owner to evaluate the path forward.

7 4. Question: Does the "Maximum depth of trench shall be 1 O' " note apply to just the sides lope collectors or also to headers/laterals/horizontals?

Response: Above note is specifically applicable to the sideslope collectors.

75. Question: Confirm there is no sand bedding needed in the LFG pipe trenches?

Response: Refer to details 1 and 4 on sheet 7. The trenches containing the pipelines shall be backfilled with clean soil free of refuse, with 6" minimum soil bedding.

76. Question: What is the total engineers cost estimate for this project?

Response: The Engineer's Cost Estimate is confidential information and will not be shared.

77. Question: Confirm that the condensate sumps or sumps for the horizontals will not be within the water table.

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Response: The horizontal collector condensate sump HCS-1 is within the lined/waste footprint.

78. Question: What is the preferred schedule for construction? Also, when is the NTP estimated to be issued?

Response: The facility is looking to start the work in January, scheduling and production constraints can be addressed during the NTP/kick-off meeting. NTP expected to be issued around mid-January 2024.

79. Question: Is line item 039B just the cost for the contractor to furnish an extra 1,270' of 6" HDPE SDR17 Perf Pipe for the site? The bid item definitions say furnish and install but the bid form has "(Supply Material)".

Response: Item No. 39B is for supplying piping and rock material for future extension/installation of the slope collector.

80. Question: Please provide a detail of the pipe slope collector going through a road crossing. Note we are requesting this due to one of the slope collectors showing the reducer in the middle of the road crossing and another showing the reducer downhill and adjacent. Cannot visualize how the 4" pipe will progress from the reducer to above ground while going through the HP Storm Casing.

Response: The pipe within the HP storm casing for the road crossing shall be solid walled.

Pipe shall transition from perforated to solid pipe within the limits of the HP road crossing.

Refer to detail 4 on sheet 8. All transitions with 6"x4" reducers indicated on the site plan shall be installed uphill of the proposed crossings, unless indicated otherwise on the site plan.

81. Question: Is it anticipated that leachate seeps will be encountered in the sideslope, toe, or horizontal collectors? If so, will the site be responsible for managing liquids or will it be the responsibility of the contractor. Also please confirm that leachate can be disposed of onsite.

Response: Leachate can be disposed of onsite. Contractors shall install sumps or low points on respective collectors first to facilitate liquid/leachate drainage, if encountered.

82. Question: Confirm if 1" -3" non calcareous stone shall be used for all horizontal, toe, and side slope collectors? The Toe Collector at Low Point detail shows pea gravel.

Response: Please refer to section AA for detail 3 on sheet 12. 1 "-3" non calcareous stone shall be used for all horizontal, toe, and sideslope collectors. Details shall be revised as part of the Issued for Construction Set.

83. Question: Confirm that the perf pattern/configuration is the same for the horizontal, toe, and side slope collectors?

Response: Refer to detail 3 on sheet 5, all perf pattern/configuration for vertical wells, horizontal, toe, and side slope collectors will be the same. Detail call-out shall be revised as part of the Issued for Construction Set.

84. Question: Please confirm project is Tax Exempt as stated during the pre-bid meeting.

a. Please note: Section GC-63 Taxes on page GC 33 or 49 conflicts with the statement during the

Pre-bid thus a confirmation in the Addendum is needed.

Response: Contractor has to pay all applicable taxes associated with this project.

85. Question: Please confirm this project does not have any union or prevailing wage requirements.

Response:No

86. Question: Please confirm successful bidder will be allowed to obtain their Augusta, GA Business License upon award of bid and allowed sufficient time to acquire it.

Response: No. Bidder must be licensed in the Governmental entity for where they do the majority of their business. Your company's business license number must be provided on Page 1 of Attachment B. If your Governmental entity (State or Local) does not require a business license, your company will be required to obtain a Richmond County business license if awarded a contract.

b. Please note: Bid docs state that Augusta, GA Business License Must be Provided for the bid in

Attachment B. Since the Bid Docs and instruction during pre-bid meeting conflict, please provide confirmation in the Addendum that it is not required for the bid, and the Contractor will be able to secure this item after award.

Addendum 1 Bid Item #23-237 Deans Bridge Rd MSW Landfill Ph 3 Gas Collection & Control System Expansion Paae 9 of 14

Response: No. Bidder must be licensed in the Governmental entity for where they do the majority of their business. Your company's business license number must be provided on Page 1 of Attachment B. If your Governmental entity (State or Local) does not require a business license, your company will be required to obtain a Richmond County business license if awarded a contract.

87. Question: Please confirm .that Georgia Utilities Contractor License will be acceptable for this project and that a General Contractor License and Additional Specialty License will not be required for this project. Also, Please confirm that a GA Utilities Contractor License is sufficient and that a Richmond County business license will not be required.

Response: General Contractor License is required. Utility License is not required.

Bidder must be licensed in the Governmental entity for where they do the majority of their business. Your company's business license number must be provided on Page 1 of Attachment B. If your Governmental entity (State or Local} does not require a business license, your company will be required to obtain a Richmond County business license if awarded a contract.

88. Question: In 2019 there was a Request for Qualification that needed to be submitted and approved prior to a Contractor being able to submit a bid. Please confirm there is not Pre-approval process required prior to submitting a bid for this project.

Response: Prequalification is not required for this bid. Qualification requirements included in Instruction to Bidders Section.

89. Question Please confirm that the bid documents including General Conditions are the only Contract Documents for this project. If there are additional Terms and Conditions or a separate contract agreement for this project, please provide it.

c. If there is an additional agreement that is needed for this project, please provide it and extend the time window for questions to allow time to review and ask questions on any additional documents if provided with the Addendum.

Response: No additional agreements are required.

90. Question: During the pre-bid it was mentioned that there is a regulatory deadline of 1/15/24 requiring Well Readings for the scope in Cell 3A. Is it possible for the site to get an extension granted? We feel it will be very difficult and potentially not possible to achieve this deadline based on material lead times from the date of contract execution.

Response: The facility is looking to start the work in January, scheduling and production constraints can be addressed during the NTP/kick-off meeting.

d. If an extension cannot be granted, would the contractor be allowed to install temporary 2" jumper lines to provide vacuum and get readings on the wells in this area.

Response: Yes.

e. Are the Horizontal wells also required to be completed by 1/15/24 regulatory deadline?

Response: No, only the infrastructure in Cell 3A.

91. Question: Will Liquidated Damages be enforced if scope in Cell 3A isn't completed by 1/15/24?

Response: Completion period will commence from start date included in NTP

92. Question: Please confirm Bentonite for well seals will be acceptable & preferred as mentioned during the pre-bid meeting.

Response: Expanding foam seal is an acceptable alternative to the specified bentonite.

Contractor shall provide material specification sheets as submittals for the selected foam.

93. Question: What size is the air/FM at the 1 0" header tie-ins? Is FM Dual contained at the cell boundary tie-ins?

Response: As per available survey information:

- The air and FM tie-ins at the 10" header is 2" and 4" (new) to 3" (existing), respectively.

The FM tie-in for the extension towards the south would occur at the existing dual contained 6"x3" stub up, as indicated on the site plan. The 6"x3" stub up location indicated on the site plan is approximate and will need to be field verified prior to construction. The tie-in from said stub up shall extend up-to 20-ft as dual contained pipe

Addendum 1 Bid Item #23-237 Deans Bridge Rd MSW Landfill Ph 3 Gas Collection & Control System Expansion Paoe 10 of 14 with the internal pipe diameter as 4", and transition to single 4" pipe within the lined limits of the landfill. This quantity shall be priced as a lump-sum on item 44.

94. Question: On the drawings - Sheet 3A- From AV-5 & LV5, 4" DR11 FM is ran into the new lateral trench for W-827, W-828, etc., but the drawings depict it running past the 10" Tie-in for this lateral to the South. Is this correct? What is the purpose of this? IS FM not being tied into at the 1 O" tie-in for W-827, W-828, & W-829?

Response: There is no existing FM beyond the above mentioned 10" header tie-in, near V-5.

The FM shall be tied in-to the existing 6"x3" dual contained stub up (current approximate location shown for tie-in) that will need to be field verified prior to construction. The header and air supply extend until the termination of the proposed forcemain.

95. Question: What size are the existing wells to be abandoned? Are they PVC or HOPE? What size shall the contractor assume the laterals to be abandoned.

Response: All well casings to be abandoned shall be assumed to be 6" HOPE. Final casing dimensions will be confirmed prior to NTP and updated on the Issued for Construction set, as necessary.

96. Question: How deep shall contractor assume tie-ins to the existing GCCS system?

Response: Assume tie-ins to be up to 5-feet deep. If field conditions differ, contractor to contact Engineer/Owner immediately.

97. Question: Where is the expected active area of the landfill at the time of construction?

Response: The active area of the landfill will be within Cell 382 which is on the South end of the landfill footprint.

98. Question: Please confirm the contractor can utilize on-site soils for backfilling trenches, where is the location of these soils on the site plan? Will the site load contractor's trucks?

Response: On-site soils shall be utilized for backfilling trenches. The site will load the contractor's trucks.

99. Question: Bid docs require Sod for restoration on side slopes and laydown areas, please confirm seeding is acceptable as discussed during the pre-bid meeting.

Response: Contractor shall use either seeding with erosion control matting or sod, in areas with preexisting grass that is disturbed as a part of the construction and is not less than 2 years old, with the exception of stockpile and borrow areas. The seeded/sodded areas shall be free of weeds and undesirable native grasses. Either of the methods can be selected by the contractor as a part of this construction and shall follow the requirements in the technical specifications, especially the final acceptance. Item 025 on the Measurement and Payment form can be used for pricing either of the selected methods. Contractor shall specify selected method.

1 DO.Question: Is any part of the construction area to be disturbed currently covered with sod?

f. If so will reseeding in these areas be acceptable for restoration?

Response: Refer to response #99 above.

101.Question: Please confirm onsite soils is acceptable to be used as topsoil.

Response: Contractor shall import topsoil for seeding/sodding as required per the technical specifications.

102.Question: Please confirm 6" of topsoil is required.

Response: Yes.

103.Question: On the drawings - Sheet 6-detail 1/6-The air & FM 90 degree elbows seem to be depicted as hard HOPE 90s. Note #9 on sheet 3B calls for wyes and sweeps on FM bends. Shall contractor assess wyes and sweeps or hard 90 degree elbows and tees for FM bends?

Response: Refer to note 9 on sheets 3A and 38 for the FM stubup fittings.

104. Question: Please confirm that the contractor should price the 6" HZ collectors up to 1 0' deep?

Response: Refer to detail 5 on sheet 9, section A-A' of detail 4 on sheet 11, and section A-A' of detail 3 on sheet 12 for collector trench depths.

Addendum 1 Bid Item #23-237 Deans Bridge Rd MSW Landfill Ph 3 Gas Collection & Control System Expansion Paae 11 of 14

105. Question: What size is the tie-in for the 8" lateral routing to newly drilled well W-508A? It seems to be a new hard fused tee into the existing 1 O" header. If this is the case, can the quantity for line item # 026 be changed to (5 EA)?

Response: It is hard fused to the existing 1 O" header. Refer to the updated bid form.

106.Question: What size are the casings for the dewatering wells? Has a new wellhead been allocated within line item # 19 for these Dewatering wells to receive vacuum connection via a lateral riser?

Response: As per available as-built information, the Dewatering wells are 2" pipe size. The dewatering well casing diameters will be confirmed prior to NTP. Wellhead quantity has been updated on the bid form.

107.Question: Is the contractor responsible for disposing of liquids pumped out of the toe-collector trench? Or will these liquids be able to be disposed of on-site?

Response: Leachate can be disposed of onsite. Contractors shall install sumps or low points on respective collectors first to facilitate liquid/leachate drainage, if encountered.

108. Question: Can it be confirmed that all of the cactus wellhead tie-ins are 6"?

Response: Assume 6-inch for all cactus wellhead tie-ins, some could be 4-inch. Final quantity and diameters will be confirmed prior to NTP.

109.Question: Can pictures be shared of the Leachate cleanout tie-in areas? To confirm, are all of these

8" LCR?

Response: Assume 8-inch for all leachate cleanout riser tie-ins, some could be 6-inch. Final tie-in dimension will be confirmed prior to NTP.

110. Question: Are E-fuse branch saddles acceptable for the LCR tie-ins or shall the contractor plan on fusing in a full size tee?

Response: Electro-fusion couplings are acceptable for tie-ins. Contractor shall provide a submittal with the product and approach for the tie-ins for the engineer's review and approval. Branch Saddles are not acceptable.

111. Question: Is there a specification for the geomembrane anchored by soil over the side slope collectors? Is this to be provided by the contractor or is there material on-site that the contractor can utilize?

Response; Contractor shall either use on-site geomembrane as indicated in detail 5 on sheet 9 or utilize on-site geotextile with a cover backfill of trash from the active area mixed with clean soil. For the second option indicated, contractor shall assume a thickness of 6" minimum backfill over the installed geotextile.

112.Question: On the drawings - Sheet 3B-TCR-1 & LCR-5.5-These new remote vacuum risers seem to require a spliced tee into the existing 10" header. Can a tie-in line item be established, isolating these (2) work tasks to a tie-in or can the quantity for line item# 026 be changed to reflect account for these tie-ins?

Response: Refer to the revised bid form attached to this Addendum 1.

113.Question: Where is air/FM being sourced for the cluster of remote wells and vertical well W-508A, RW-DW-C & RW-DW-D?

Response: As per available as-built data, DW-C and DW-D have their respective air and forcemain supply as existing. W-508A shall receive air and forcemain supply from the existing stub-ups at DW-C.

114.Question: Please confirm that there are no temporary or final caps in the work area.

g. If there are, please provide additional information needed for Geosynthetic repairs if required.

Response: There are no temporary or final caps in the work area.

115.Question: Please confirm that all road crossings are either dirt or gravel.

Response: Correct.

116.Question: Section 31 20 00 Part 3.10 states cost of laboratory and field testing of backing filling compaction and materials is the responsibility of the contractor. Please confirm this is not applicable to this project.

Response: This is not applicable to this project.

Addendum 1 Bid Item #23-237 Deans Bridge Rd MSW Landfill Ph 3 Gas Collection & Control System Expansion . Paae 12 of 14

117. Question: Section GC-110 mentions that a field office may be a requirement by the contractor. Is a field office required to be provided by contractor?

Response: Field Office will not be required.

118. Question: Will we be required to obtain a Georgia Utility Contractors license if awarded the project?

Response: Utility License is not required.

119.Question: Please list what licensing information we need to submit alongside our bid.

a. Does our state (NC) business license number suffice for bidding purposes?

Response: Yes, your NC business license number is suffice and all other applicable licenses as it relates to this project is due at submittal.

120.Question: Who is responsible for survey (pre-construction, as-built and final)?

Response: Pre-construction survey: Refer to section 31 20 00-5, 3.02 Pre-Construction Layout.

As-Built survey: Refer to section 01 30 10-4, 1.05 Record Drawings

121.Question: Does the landfill have a preferred surveyor?

Response: The Site does not have a preferred surveyor. The previous GCCS surveyor for the site was Southern Land Surveyors.

122.Question: Is the landfill up against any project regulatory deadlines? If so, when is that deadline and what section of the project needs to be completed by then?

b. In the pre-bid meeting minutes, I heard Well Readings for Cell 3A is the only portion needed to be completed by January of 2024 and schedule for the remaining scope of work is to be determined. Is this correct?

Response: Infrastructure within cell 3A is to be completed before the regulatory deadline, January 15, 2024. The facility is looking to start the work in January, scheduling and production constraints can be addressed during the NTP/kick-off meeting. Work substantial completion duration is 120 days set by NTP date.

123.Question: Section 3.06B of HOPE Pipe Handling states two methods of joining HOPE- heat fusing and mechanical. Are electrofusion couplers acceptable?

Response: Electro-fusion couplings are acceptable for tie-ins. Contractor shall provide a submittal with the product and approach for the tie-ins for the engineer"s review and approval. Branch Saddles are not acceptable.

124.Question: Are fabricated reducing tees with gussets acceptable or only full-sized tees and applicable reducers?

Response: Only full-sized tees as acceptable. Fabricated reducing tees with gussets are not acceptable.

125.Question: Does the landfill have a preferred stone vendor?

Response: No. The Landfill purchases rock from Martin Marietta Local Quarry. The rock procured for this project shall be non-calcareous and meet the requirements in the technical specifications.

126.Question: Is this project tax exempt?

Respond: No.

127.Question: Will the contractor be required to acquire a water meter from August Utilities Department?

Response: Water meter will not be required for non-potable water. Contractor can use non potable water from the landfill pump

128.Question: Will the contractor be required to set up a suitable office facility on-site?

Response: No.

129.Question: Confirm no use of granular bentonite for vertical extraction wells.

Response: Refer to section 33 21 70-3, 2.03 Bentonite.

130.Question: Confirm the requirement of sod use for all disturbed side slope areas.

c. Is the contractor allowed to hydroseed only in place of the sod?

Response: Contractors shall use either seeding with erosion control matting or sod, in areas with preexisting grass that is disturbed as a part of the construction and is not less than 2

Addendum 1 Bid Item #23-237 Deans Bridge Rd MSW Landfill Ph 3 Gas Collection & Control System Expansion Paae 13 of 14 years old, with the exception of stockpile and borrow areas. The seeded/sodded areas shall be free of weeds and undesirable native grasses. Either of the methods can be selected by the contractor as a part of this construction and shall follow the requirements in the technical specifications, especially the final acceptance.