Attachment 27-Wells 4 PFAS PFOA - Site Visit Questions-17 Aug 26.pdf

QUESTIONS AND RESPONSES FOR SOLICITATION # FA480326B0010

VLSB 24-0058 - Well 4 PFAS/PFOA

1. Is the contractor responsible for obtaining the required state permit? Yes

2. Are any additional permits required for this project? If so, which permits are required, and who is responsible for obtaining them? See Well 3 Final Report 3.3 page 18 however, it is the contractor’s responsibility to obtain all permits needed for this project..

3. The pricing spreadsheet (Excel) does not include separate line items for certain costs, such as the state permit and bag filters. Under which line items should these costs be included? Contractor can add additional lines if deemed needed.

4. The project schedule allows for a total duration of 360 calendar days. How many days are allocated for obtaining the state permit, and how will the schedule be adjusted if the state permitting process exceeds the allotted time? See SOW.

Contracting to determine any extension to POP. The Contracting Officer can extend the period of performance days/project completion date as required for any approved delays.

5. If Shaw AFB requires more than two weeks to complete submittal reviews, will the project completion date be adjusted accordingly, or will the contractor still be required to meet the original 360-day completion schedule? Govt shall have two weeks to review each submittal. The Contracting Officer can extend the period of performance days/project completion date as required for any approved delays.

6. How will schedule impacts be addressed if critical equipment or materials required to complete the project are unavailable due to market conditions? For example, the availability of treatment vessels has been a challenge in recent years. Critical equipment lead time will need to be documented and present to the Government for review. The Contracting Officer can extend the period of performance days if justification is acceptable.

7. Approximately how far is the drain line that will be connected to the sump in the pre-engineered metal building? See updated SOW

8. For the demolition portion of the project, can the Government provide approximate quantities of the materials to be removed, including:

Answer to 1-4 below. All equipment was above ground and visible at the site visit.

Contractor responsible for ensuing quantities.

1. Linear feet of piping – See above

2. Linear feet of wiring/conduit N/A See above

3. Number of valves N/A See above

4. Number of motors and pumps See above

9. What type of ion exchange (IX) resin is required for the treatment system?

See Table 2-2 of Well 3 Final report page 14

Treatment Media – Purolite 694E IX media, NSF-61-complaint or approved equal

10. What is the required quantity of ion exchange (IX) resin (in cubic feet)? Also see Well 3 Final report sheet 1026. Vessel Volume 2900gal /388ft^3

11. Can Shaw AFB provide the source water quality report or recent influent water quality data?

See Table 6-1

For Well 3 PFAS Summary EPA Method 533

12. Is the contractor responsible for guaranteeing that the treated water achieves PFOA/PFOS concentrations below 4 ppt, even when using the ion exchange resin specified or recommended by Shaw AFB? The contractor is responsible for site adapting Well 3 design to Well 4 location.

13. What is the required micron rating for the bag filters?

Bag Filter information –

Rosedale Products,INC.

PH800-821-5373

Item #N6-0270-1

PO-5-P2-SS

See Well 3 Final Report Table 2-1 Sheet 13

14. Who currently provides SCADA/PLC support for Shaw AFB's drinking water system, and may the contractor coordinate directly with that organization?

The following Contractor has the current contract to update the SCADA systems on base

SOAP SCADA Engineering – PM Adolfo Trevino 832 778-8964 www.soapeng.com

15. Is the existing SCADA system compatible with the PLC specified for this project? yes

16. Will Shaw AFB provide temporary storage tanks for system testing prior to discharge? No contractor shall provide all required equipment

17. Is AECOM-Brice Engineering currently providing PFAS-related support services to Shaw AFB, and if so, are they eligible to compete for this contract? Currently there is not any known contractors on file providing PFAS-related support services to Shaw AFB. However, all Small Business Contractors under North American Industry Classification System Code 237110 are eligible to compete for this contract.

18. Which contractor constructed Well 3 treatment system? Are they eligible to bid for this work? Contract No W912HN-18-D-1000 Weston Solutions, INC with Aerostar

SES LLC.

19. Is the anticipated contract value required to fall within the stated range of $5 million to $10 million, or will proposals outside that range (higher or lower) be considered?

The anticipated contract value is not required to fall within the $5-$10-million-dollar range. Bids outside of this range may be considered if bid is determined the most advantageous to the Government and all other responsible bidder requirements per Section L are met.

20. Can we assume that there will not be any need for a new generator under this contractor? A new generator is not within scope of this project.

21. Can we assume that no boundary wall construction will be required under this contract? Yes

22. Can you please provide the missing drawings? See attached Well 3 Final Report.

23. Evaluation factor says that, “Award will be made to the responsible bidder whose bid is responsive to the terms of the IFB and is most advantageous to the Government, considering price and price-related factors included in the invitation”. What is considered under “responsible bidder” and “price-related factors”? The determination requirements noted in the Solicitation Section L, paragraphs L-3.1 through L.37 are what is considered under responsible bidder. Price-related factors are other supporting documents to include bond, performance/payment, etc. documents. Will it be awarded to the lowest bidder? A contract will be awarded to the lowest bidder who meets all the requirements of the solicitation to include bid bonds, acknowledgement of all amendments, etc. Or are you asking for other supporting documents to be submitted? Yes. We are asking for the other supporting documents identified in the solicitation to be submitted.

24. Is a bid bond mandatory to be submitted with the bid? Yes, a bid bond is mandatory to be submitted at the time of the bid. Bids submitted without bid bond guarantee per Solicitation Standard Form 1442, block 13b will not be considered.

25. When is the award anticipated to be made? An award is anticipated before 30 September 2026.

26. Well 3: When was it built and what was the contract cost for the construction? Completed in 2025. $5,535,857.44

27. SOW, Section 1.3 states that the system objective is to “reduce the PFAS/PFOS to non-detect.” Since achieving non-detect concentrations for all PFAS compounds is not feasible, can the government please clarify the target treatment standards for PFAS. Are there water quality target treatment goals for compounds other than PFAS? See Well 3 Final Report Sheets 34 to 36. Contractor shall test for the all listed in Table 6-3 Summary of PFAS Sample Results.

28. Can the government provide Well 4 influent water chemistry data, including PFAS, metals, etc.? Depending on the influent water chemistry, pre-treatment could drastically extend the life of the IX resin. See SOW Figure 1

29. Please provide the IX resin specifications being used at Well #3. See Table 2-2 of Well 3 Final report page 14

Treatment Media – Purolite 694E IX media, NSF-61-complaint or approved equal

30. Please clarify the current disinfectant dosing system at Well #3. During the site visit, it was implied that the dosing point was previously prior to the IX resin but it was subsequently moved to a point after the IX resin vessels.

The disinfectant dosing point of the system is just prior to the static mixer. The static mixer is after the IX resin. However, the system does use treated water from the main line to lube the main well pump prior to start up. As part on this upgrade the contractor shall provide an line filter that will remove the chlorine from the treated water entering the pre lube line. See update SOW.

31. Section 3.1 of the SOW details the requirement to include a solenoid and check valve to pre-lube the well with potable water. Can the government confirm what potable water source is being used at Well 3? Specifically, is the water being used to pre-lube Well 3 chlorinated and, if so, what is the concentration? See answer 31.

32. Please confirm whether an 8-valve manifold arrangement is acceptable, provided the system can maintain desired functionality. Please match the 12 Valve system at Well 3.

33. Please provide the manufacturer, model number, processor type, and communication protocol for the existing PLC system. Same as Well 3. See Well 3 Final report. Sheet 104

34. Please confirm whether sufficient spare PLC I/O capacity is available for the proposed system. Contractor shall plan on adding one input and output card.

35. Please provide the manufacturer and version of the existing SCADA platform.

Allen Bradley PLCs, SOAP Engineering, are in the process of updating the SCADA system.

36. For the new soda ash feed hopper/slurry mixer, please identify all required PLC/SCADA monitoring and control points. Auger speed, duration, autofill of slurring tanks

37. Please provide a list of new alarms that are required to be integrated into the existing PLC/SCADA system. See updated SOW.

38. SOW, Section 2.5.2: “All equipment shall be onsite prior to the start of construction phase.” Will the government allow some equipment to be delivered after excavation, concrete, and underground utility work? See SOW

39. Large and sensitive equipment are typically scheduled to arrive prior to installation to prevent damage from construction activities or weather (e.g., PEMB, tanks/vessels, and controls equipment). See SOW

40. Some equipment with long lead times may push the start of the project if we have to wait to begin to construction until all equipment is on site. See SOW

41. SOW, Section 3.1: “All new piping shall be insulated and heat traced.” Please confirm this is referring to above-ground piping only. Yes above ground only

42. Is there an existing geotechnical report for the Well #3 or Well #4 site that can be provided? See Well 3 Final Report Sheet 695-736

43. The SOW requests a 6-inch curb around the building perimeter. Assuming this curb is for containment purposes, can the government please specify the target containment capacity (e.g., 110% of the 8’ x 10’ vessel volume?). Per the SOW the building will be 30x40. Volume of containment will be 30x40x0.5= 600ft^3

44. SOW, Section 3.1: “The new foundation will include a 6-inch (”)-high containment curb, a 2-ft square floor sump, and concrete pads for the equipment.” Is the government open to 6” curb alternatives other than concrete if the containment capacity is met? Depends on the alternatives.

45. SOW, Section 3.1: “All concrete will be sealed.” The Well #3 building has an epoxy or similar floor coating. Is an epoxy coating required at Well #4, or can the concrete be sealed in lieu of a coating? Epoxy is required.

46. SOW, Section 3.1: “The floor sump shall be connected the sanitary drain line. See Site utility attachment.” Section 3.1 also states: “The sewer tie in location is currently uncertain, but it is assumed that a connection is available within the currently fenced in area.” Is the closest existing sanitary drain line on Orchid St as shown in the site utility attachment? Connection is not within the fenced in area.

Connection is 300LF away from the building site location on Orchid Dr. middle of the road.

47. The SOW states there will be concrete pads for equipment. From observations during the site visit, it appears that Well 3 construction utilized post applied grout pads for leveling. Does the government want the same type of pads as were used at Well 3? Yes

48. The Well 3 PEMB has a liner insulation system. Ex: ProLiner, OptiLiner, Simple Saver.

Is this insulation system required for Well #4? yes

49. The Well #3 building has metal liner panels from the floor to approximately 8’ high around the inside perimeter of the building. Is this required at Well 4? YES

50. SOW, Section 3.1: “Underground and above-ground power and communication raceways will be PVC and RGS conduit, respectively.” Is EMT conduit acceptable in the pre-engineered metal building like in the Well 3 building? YES

51. SOW, Section 3.1: “The Contractor shall be responsible for all actions and costs associated with the investigation and management of potentially contaminated soil within the project area.” Are there any existing data at the site that could help scope this task? What contaminants could potentially be present? Please see updated SOW and lead soil sample report.

52. Please confirm the current load on Transformer T2004A and if this transformer is dedicated to this site. Loads Not available. Contractor to assume that the increase in motor size not to impact the main transformer size.

53. Please confirm the purpose of and load on Transformer T2004B. Is this a split phase transformer? T2004B is a 25kVA transformer suppling power the tower light and to the monitor well control cabinet.

54. Other than the 600 GPM booster pump, please confirm all pumps (including air stripper pump) will be replaced. The 600GPM booster pump and the stripper pump is the same pump. See SOW. 40 HP to 50HP.

55. Please confirm existing VFDs and VFD transformers are in good condition and will not be replaced. See updated SOW.

56. Does electrical system testing need to be performed by a third party? Electrical system does need to be tested. Does not need to be tested by a third party.

57. Does the Well #3 building have a lightning protection system? Lightning protection system will not be required at Well 4.

58. A fire alarm/security system was not observed in the Well #3 building during the site visit. Is a fire alarm/security system required for Well #4? No

59. Pursuant to 48 CFR 215.305(a)(2)(C) and DFARS 215.305(a)(2)(C), when evaluating the past performance of an offeror that is a small business concern in response to a competitive solicitation, contracting officers shall consider relevant past performance information provided for affiliates of the offeror. Please confirm that Offerors may rely on the use of affiliate past performance in our proposals. Offerors my rely on the use of affiliate past performance in your bids.

60. Attachment 01 Statement of Work states “The Contractor shall be responsible for all actions and costs associated with the investigation and management of potentially contaminated soil within the project area” which is an unquantifiable requirement.

Will USAF consider specifying a total cubic yards of PFAS/PFOA contaminated soils for the bidders to base our proposals on? See Updated SOW the govt estimates that 2000ft^3 of soil will be removed for the building foundation and 960ft^3 of soil will be removed for the underground piping to be installed. Total soil 2960ft^3

61. The RFP provides 210 calendar days for completion from construction Notice To Proceed, plus 30 more days for contract closeout. Given expected material lead times of up to 30 weeks, will issuance of construction NTP be delayed until long lead material deliveries are complete? See updated SOW.

62. Are there any proposal page count limitations? Bid packages are not to exceed thirty

(30) pages. Front and back of page may be used.

63. Will USAF permit submission of electronic proposals instead of hardcopies? See updated sow

64. Will USAF provide a copy of the site visit sign in sheet from the July 9, 2026 site visit?

Yes. A copy of the sign in sheet is provided Solicitation Amendment 0001.

65. Section 2.5.2, third bullet indicates that all equipment shall be on site prior to the construction phase. Some of the equipment can’t be ordered until the design phase is predominantly complete. Even if certain long lead items can be ordered early, the lead times for many items will exceed the 90 days, thus this requirement will delay construction. In addition, having all equipment on site prior to construction is not necessary and will only delay the project. Can this requirement be deleted? See updated sow

66. Will BW-4 be offline during construction? If not, how much notice is required to coordinate shutdowns/outages? Shutdowns will be required for both electrical and mechanical modifications to the existing equipment and added new equipment.

Some shutdown periods will be for extended periods while the work is being performed. Please advise if the system can be shut down as necessary to complete the work. The Well 4 will remain operational during the construction of the building and piping installation.

The Contractor will be given no more than three weeks window per shutdown of the Well4. The contractor will need to phase the shutdowns to allow this and return the well back over to operations.

Given the short time frame for design, has the Government collected any historical water quality data to design the PFAS treatment system? It is recommended that the raw water and air stripper effluent (pre chemical addition) be sampled for the following design parameters. Please provide all available data to confirm the system design. See SOW Figure 1

• Total and soluble metals including Iron, Manganese, Calcium, Magnesium

• Hardness

• Alkalinity

• Sulfate

• Nitrate

• Alkalinity,

• Chloride

• Total Suspended Solids

• Total organic Carbon

67. Please provide recent Shaw BW-4 raw and treated effluent PFAS and VOC data. See SOW Figure 1

68. Please confirm the electrical demand with all connected motors and loads operating? See updated SOW for new electrical equipment.

69. Please confirm what is connected to the Main Distribution Panel (MDP) electrical breaker No. 12/14/16? Information not available

70. The underground utility map (Attachment 05) is missing utilities observed during the site visit including but not limited to; water lines, electrical lines, communications/fiber lines, and utilities associated with the remediation system extraction/recharge wells. Please provide a better map defining those existing utilities. Also please provide a legend for all utilities shown. Best map was provided.

71. Section 2.2.2 requests 17x22 ANSI C drawings, which is not the typical drawing size.

Are ANSI D, 22x34 drawings acceptable? See update SOW.

72. Can a copy of the site walk sign-in sheet be provided? Yes. A copy of the sign in sheet is provided Solicitation Amendment 0001.

73. Section 3.1, third bullet: This sentence states: “Remove and replace the existing piping: From the main Well 4 pump motor to the static mixer.” Was this sentence intended to indicate replacement of piping between the Well 4 motor or the existing Air stripper Effluent pump to the static mixer? If the Well 4 motor, does all piping to the top of the air stripper and the chemical recirculation piping also require replacement? Please clarify the extent of the required piping replacement. See updated SOW.

74. Section 3.1, third bullet: This sentence states to replace piping to the static mixer.

There is a new flow meter upstream of the static mixer that appears in good condition. Should that flow meter remain or require replacement? No See updated

SOW.

75. Section 3.1, twelfth bullet identifies to assume the sewer tie-in will be available within the fenced in area. No sewer is identified within the fenced area, but sewer is identified on Orchid Street. Should we assume to connect to the existing sewer on Orchid Street, or stop the sewer connection at the fence line as directed? See Updated SOW.

76. In Section 10 (Page 1) of the solicitation, it identifies a 360-day period of performance. Will weather days that prevent work to be completed safely be allowed to extend the contract period? Yes, however only after prior coordination between the Contractor and Contracting Officer and approval of the Contracting Officer.

77. In Section 10 (Page 1) of the solicitation, it identifies a 360-day period of performance. Will the 360-day period be extended if the 2-week government design review times are exceeded? Period of Performance may be exceeded for government caused delays to include any additional time needed past the 2-week government design review times. The period of performance time may also be extended for other reasons determined acceptable by the Contracting Officer and at no additional cost to the government.

78. Can commissioning and PFAS sampling be completed after construction and acceptance of the system? No. PFAS sampling shall be completed before acceptance of the system.

79. In Section I of the Solicitation (Page 14), Liquidated damages will be paid by the Contractor if the work is not completed or accepted. Please confirm when Liquidated Damages begin? Liquidated Damages will be assessed based on the reason(s) contractor performance exceeds period of performance calendar days. Is it after 330 (Construction Completion) or 360 days (Closeout completion) from Notice to Proceed? Liquidated Damages will not automatically begin after 330 or 360 calendar days. In the event there are excusable delays, liquidated damages will not be assessed. Liquidated damages will only be assessed after determination the contractor caused work delay and any other attempts to resolve delays or the contractor’s inability to complete contract performance have been exhausted.

80. Please confirm startup, optimization and maintenance can be completed after construction completion, and that it will not be subject to liquidated damages? If the Government wants start-up/commissioning and PFAS sampling data in our completion report, will additional time be provided for the commissioning/startup period? See updated SOW

81. Are there any work restrictions, or can work be completed 7 days a week, 365 days per year. The contractor may be allowed to work weekend however, no work can be covered up prior to the govt COR inspecting the work.

82. Section 3.1.2 Constraints, Existing Conditions, last bullet identifies “Environmental Monitoring wells and treatment lines near Well 4? Are these wells powered from the Base Well 4 electrical service or do they have their own service? T2004B supplies power to the monitoring wells.

83. Government provided Attachment 02 “Pricing Sheet”, cannot be open without log-in credentials. Can the government resubmit this document so it can be open in excel.

84. For the submittal of the offeror’s proposal, is there a page count or structure requirement? Bid packages are not to exceed thirty (30) pages. Front and back of page may be used. There is not a specific structure requirement for bid packages.

85. Solicitation document under Section L – “Instructions, Conditions, & Notices to Offerors or Quoters”, L-3.5 Necessary Organization, Experience, Accounting & Operational Controls, and Technical Skills requires resumes for specified personnel.

Please clarify the minimum qualification requirements of the Business Development position. Please also clarify the minimum qualification requirements of any required project Cost Estimation position compared to required Repair/Replacement Staff, if different. There are no minimum qualification requirements for the Business Development Position, Cost Estimation position or Repair/Replacement Staff positions.

86. Solicitation document under Section L – “Instructions, Conditions, & Notices to Offerors or Quoters”, the requirement under L-3.6 “Necessary Production, Construction, and Technical Equipment”, Can the government clarify what types of documentation is required to meet this requirement? The types of documentation include a listing of any company (on-hand) equipment that will be used to meet the requirement. If equipment is not already on-hand, how does the contractor plan to acquire needed equipment. Additionally, types of documentation include contractor’s financial resources statement and listing subcontractor(s) the contractor anticipates using to meet this requirement.

87. Please confirm if the new service will be implemented starting from the procurement of a service transformer and the subsequent power distribution.

88. Please confirm the metering requirements for the new building. No electrical metering. The SCADA will still need to be able to read the GPM.

89. Attachment 19 shows a generator installed for well 3. Please confirm if back-up power generation is required for the new facility. No.

90. Would there be any utility easement concerns regarding the roads or residential homes adjacent to the property? No

91. Is the tree located at the potential building site a protected species? If so, are any permits or mitigation measures required? There are no special permits required for the removal of trees for this project. Todd Douglass will need to be contacted prior to tree removal so he can inspect what exactly is being cut to decide if he needs to be present during removal work or if mitigation is required. He will need to notified two weeks prior to work.

92. Given that the site is adjacent to residential properties, are there any zoning restrictions, setbacks, buffering requirements, or land use limitations that would require permitting? No. land owned by Shaw.

93. Is groundwater anticipated to be encountered during construction? If so, is the approximate groundwater depth known, and are there any specific dewatering requirements? Groundwater not expected to be encountered during construction

94. Could you please provide the project drawings in PDF format? See Well 3 Final Report.