22R1306-Note3.pdf

DEPARTMENT OF THE NAVY

NAVAL FACILITIES ENGINEERING SYSTEMS COMMAND PACIFIC

258 MAKALAPA DR STE 100

PEARL HARBOR HI 96860-3134

Notice No. 3 21 March 2022

PRE-PROPOSAL QUESTIONS & ANSWERS

RFP N62742-22-R-1306

FY19 MCAF P-9030/PAF189030 APSI - CARGO PAD WITH TAXIWAY EXTENSION

FY19 MCAF P-9040/PAF189040 APSI - MAINTENANCE SUPPORT FACILITY

FY20 MCAF P-9010/PAF189010 APSI - FUEL TANKS WITH RECEIPT PIPELINE &

HYDRANT SYSTEM

FY20 MCAF P-9021/PAF189021 APSI -AIRFIELD DEVELOPMENT PHASE 1 - ROADS

TINIAN INTERNATIONAL AIRPORT, TINIAN, CNMI

NOTE: The following questions and answers are provided for INFORMATION ONLY. The RFP remains unchanged unless it is amended in writing on a Standard Form 30.

RESPONSES DEFERRED FROM NOTICE NO. 2

20. Note 1 accompanying the price proposal Schedule SF1442 MEC/MPPEH Bases of Pricing

COMMENT:

Note 1 states that the Base Item CLIN 0001 thru CLIN 0003 and Option Item CLIN 0004 shall be based upon Low & High Likelihood areas of encountering MEC/MPPEH as designated in Figure 3.1 of the Tinian ESS Annex A-01 which accompanied the solicitation. Aside from the low likelihood areas designated for P-9030 APSI Cargo Pad with Taxiway Extension and P-9040 Maintenance Support Facility the remaining P-9010 and P-9021 area are not a feature of Figure

3.1 of the Tinian ESS Annex A-01.

QUESTIONS:

1. Please denote whether the areas associated with P-9010 and P-9021 fall within a Low & High Likelihood areas of encountering MEC/MPPEH.

2. In the event that Figure 3.1 of the Tinian ESS Annex A-01 were to indicate that P-9010, P- 9021, P-9030 & P-9040 or part thereof overlaid a high probability area would the cost associated with full MEC/MPPEH compliance be measured under CLIN’s 0005, 0006 and 0007 or the Base & Option Items.

3. Are CLIN’s 0005, 0006 and 0007 reserved only for MEC/MPPEH encounters in areas previously denoted as unlikely?

ANSWER:

Q1: Response is deferred.

Q2: The Base Items Q3: Yes, it is for areas previously identified as Low Likelihood

RFP N62742-22-R-1306

Notice No. 3

23. Planned Modification CLINs 0005AA, 0006AA, & 0007AA - UNIT RATE FOR

MEC/MPPEH

COMMENT:

Each of the CLIN’s referenced above provide a daily unit of measure for full MEC/MPPEH clearance ahead of construction down to a TOI of 20mm in areas previously identified as unlikely. In each case the Governments stated quantity is 60 days. Furthermore, note 3 to Form SF1442 provides direction that the actual quantity will be based on the production rate proposed in the Management Plan Factor Document 00202. It is not clear from the description which takes precedence, the governments stated quantity or the detailed production rate provided in Document 00202.

QUESTION:

Are we to assume that with each Planned Modification full clearance is to be accomplished within the stated 60-day period. This would automatically drive the production rate for each of the differing site conditions? Alternatively, is the 60 days merely a nominal period and that the production rate is to be modelled on the overriding need to match the construction schedule for each activity

ANSWER: Response is deferred.

31. P-9021: Offsite Roadways Bid Form – CLIN 0007AA Planned Modification

(MEC/MPPEH)

Please confirm if the MEC/MPPEH areas of concern of low likelihood apply only to locations of disturbed areas for new gravel roadway (Drawing Sheets CS122 thru CS124) and portion of new asphalt paved roadway at Area R3-1 (Drawing Sheet CS101).

ANSWER: Response is deferred.

37. Factor 4, Management Plan, states the following:

“Identify methodology/technology to be utilized, number of MEC munitions response teams/number of personnel on each team, identification of risks, logistics and resource management approach. Include a minimum production rate utilizing number of excavations in pursuit of anomalies per day that is the basis for Unit Cost per Calendar Day on the Price Proposal Schedule. Minimum production rates utilizing something other than number of excavations in pursuit of anomalies per day will be rated Unacceptable.”

We highly recommend that the Navy re-consider the production rate language as screening for 20mm rounds (which required is ¾ inch screen) is much easier to accomplish through soil screening versus trying to “dig” on each individual suspect target. Suggest that the Navy consider approaches such as soil screening and corresponding production measures such as cubic yard per day.

38. P-9030: Cargo Pad & Taxiway Extension Spec Section 33 16 15 Drawing Detail A4/S-203 Fire Water Storage Steel Tank

a. For the design/manufacture/installation of the Fire Water Storage Tank, please clarify if a Bolted Steel type tank would be acceptable in lieu of the specified Welded Steel tank.

b. Steel Tank Ringwall Foundation and tank base preparation detail A4/S-203 shows sand layer under the steel tank floor/bottom. Please provide thickness of this sand layer cushion.

ANSWER:

a. Bid as specified.

b. Sand layer will vary in thickness as noted on Ring Wall Foundation Notes on S-004. Provide minimum 2" thickness of sand layer. Notes will be revised in a future amendment to show minimum 2" thickness of sand layer.

39. P-9030: Cargo Pad & Taxiway Extension – Spec. Section 33 11 13 and Drawing Sheet CU104 Potable Water Supply Wells Drawing Sht. CU104 shows that the new 100mmØ waterline WL01 will connect to the existing water well. However, Spec. Section 33 11 13 specifies a new water well. Please clarify and/or confirm that there is NO new water well to be constructed for this bid.

ANSWER: Confirmed. There is no new water well included in the P-9030 scope. Specification 33 11 33 will be removed from the project in a future amendment.

40. P-9030: Cargo Pad & Taxiway Extension Drawing Sht. S-002 – Foundation Notes- Item X.

Probing and Grouting Please clarify if the 370mm thick PCC pavement for Cargo Pad (detail D3/CS500) and 230mm thick Heavy Duty PCC Pavement (detail A4/CS500) for Biosecurity area will not require any probing and grouting.

ANSWER: Confirmed. Probing and grouting is not required under the pavement sections.

41. P-9010: Fuel Tank with Receipt Piping and Hydrant System Drawing Sheets SP104, SP502 Cut and Cover Steel Tank – Floor Plate Joints

Details C2 and C3 on Sht. SP502 show 5x50 steel backer bar at all tank floor plate joint weld connections. Please clarify if this steel backer bar is required to be cast with concrete slab base or if this can be installed post pour.

ANSWER: Floor plate must bear flush with the grout surface. Provide a pocket at anticipated floor plate joints during concrete placement. This will allow placement of the backer bar afterwards. See future amendment for amended sheet SP502.

42. P-9030: Cargo Pad & Taxiway Extension Spec Section 31 23 00.00 20 Drawing Details D1/CS500, C1/CS500, A4/CS500 Excavation and Subgrade Preparation, Basecourse for Structures, Pavements, Pads, Roadways Drawing detail states that basecourse under these structures should be extended a minimum of 610mm (2’-0”) beyond the edges.

Specification Section 31 23 00.00 20 paragraphs 3.3 and 3.4 state that excavation and subgrade preparation for these structures should be extended by at least 1.0m and 1.50m respectively beyond the edges.

a. Please clarify if excavation and subgrade preparation extension beyond structure/pad edges should be 1.0m or 1.50m.

b. Does the above extension apply also to basecourse placing or should it be limited to only 0.610m per drawing detail?

ANSWER:

a. Specification 31 23 00.00 20 in section 3.3 describes excavation for buildings, sidewalks, and pavement areas. In these locations, 1.0 meter beyond the planned limits should be excavated.

Backfill to grades indicated per 3.6. For pavement install, per details D1, C1, and A4 on CS500, extend the crushed aggregate 610mm beyond the edge of the pavement. This is in lieu of the common backfill per specification section 3.6 in these areas. Provide common backfill to planned grades on top of the crushed aggregate adjacent to the pavement edge per 3.6.

Specification 31 23 00.00 20 in section 3.4 describes situations where brown, dark brown, reddish brown silt, sandy silt, and clayey silts are found during excavation for buildings, sidewalks, and pavement. In these cases, extend removal of the material to 1.5 meters from the planned limits, instead of 1.0 meter, and remove 600mm deep. Refer to section 3.4 for additional information regarding the backfill material in this condition.

b. Base course install limits should be per the details provided for the particular installation (building, sidewalk, or pavement).

43. P-9040: Maintenance Facility Ref. Specification 07 27 19.01 Self-Adhering Air Barrier

Per specifications, the product calls for a 40 mil permeable material consisting of rubberized asphalt on a HDPE carrier. Our US vendors state that HDPE material is a non-permeable type.

Please clarify this conflicting requirement.

ANSWER: Specification 07 27 19.01 para 2.1 to be edited to clarify permeability requirements in a future amendment.

44. P-9010 – Detail C1/CS506 and Spec Section 05 50 13 Fixed Bollard Diameter and Height above Grade Detail C1/CS506 calls for 4” diameter bollard, whereas spec. section 05 50 13 para. 2.4 calls for 6” diameter. Please clarify diameter as well as height of bollard above finish grade.

ANSWER: Specification section 05 50 13 refers to bollards that are adjacent to buildings or within buildings. Refer to Detail A3/A-541 for the height. Detail C1/CS506 is for all other bollards shown within the drawings. Height of the bollard will be provided on the amended drawings in a future amendment.

45. P-9010 – Drawing CS105 Stop Sign and Stop Bar Drawing CS105 does not show any Stop Signs or painted Stop Bars along 8th Avenue asphalt entrances.

Please confirm if there are none required.

ANSWER: Provide stop signs and stop bars at new driveways. Refer CS105, will be amended in a future amendment.

46. P-9010 – Detail A4/CS503 Crosswalk Striping We were unable to locate where this detail applies within the P-9010 plans. Please clarify if there are any crosswalk locations on P-9010.

ANSWER: The crosswalk is not required on P-9010. Refer to CS503 where the detail has been removed in a future amendment.

47. P-9010 - CG601 Splash Pad – Storm Drain Line 7 Please provide dimensions and detail for Item 450 Splash Pad listed on Dwg CG601 under Storm Drain Line 7.

ANSWER: Please refer to B4/CG502 for splash pad detail. CS103 has been revised to indicate the detail reference. Refer to the future amendment.

48. P-9010 – Detail B4/CG501 Sloped End Treatment Detail We were unable to locate in the P-9010 grading plans where detail B4/CG501 would be applicable. Please advise if this detail applies to P-9010, and if so, provide locations.

ANSWER: The slope end treatment is not required on this project. Refer to CG501 where the detail has been removed in future amendment.

49. P-9010 - Spec Section 33 40 00 para 2.4 Storm Drain Manhole Ladder Please provide detail for Steel Ladder for Storm Drain Manhole showing top and bottom clearance dimensions.

ANSWER: Please refer to specification 33 40 00 for the description of the ladder. Detail A1/CG500 has been updated to show the ladder and note 4 provided with the top and bottom clearance dimensions. Refer to the amended drawings, in a future amendment.

50. P-9010 – CG104 and Detail A1/CG502 Rip Rap locations P-9010 - It is our interpretation that rip rap is required only at the outfall control structures (Detail A1/CG502) and at headwall 411 as shown on CG105. Please confirm.

ANSWER: Confirmed. Rip Rap is installed at the outfall control structures and headwall 411.

51. P-9010 – Civil Plans Landscape Hydroseed Limits Because the Site Grading (CG) plans do not show the limits of site improvements as shown in the Civil Site (CS) plan sheets (i.e., gravel road, asphalt, sidewalk limits, etc.), it is very difficult to define the hydroseed areas. In order for all Offerors to be bidding to the same parameters, we request that dedicated landscape plans be provided.

ANSWER: Response is deferred.

52. P-9010 – POL Civil Plans (CF) Wire Fence Limits and Locations On the affected Pol Civil pipeline plan sheets, please provide the removal and replacement limits for the wire fence and/or gates, as well as detail call outs.

ANSWER: Removal and Replacement Limits and detail callouts have been added to the following sheets: CF111, CF112, CF113 and CF114 in a future amendment.

53. P-9010 – POL Civil Plans (CF) Asphalt Pavement Removal and Replacement Detail We were unable to find where the existing asphalt pavement thickness was stated in the POL plans for the various roadways, as well as a detail for removal and replacement limits for the fuel pipe trench.

Please provide section detail showing asphalt and ABC/Subbase thickness (including shoulder improvement requirements) and asphalt removal limits beyond trench width.

ANSWER: Various Asphalt Pavement Depths for existing roadways can be found on the geotechnical boring sheets (B-101 to B-114). Asphalt removal and replacement limits must be per detail B3/CS501.

54. P-9010 – Drawing ES105 and detail C3/E-506 Keynote 010 – Bore Underneath Existing Pavement Drawing ES105 keynote 010 states to bore underneath existing pavement for new communication ductbank tie-in to an existing Handhole in West Street. As standard sawcut,, remove, and replace asphalt for POL pipe installation crossing the same roadway is to be performed about 50 feet away, we request that the option be availed to the Offeror to sawcut and remove asphalt, perform standard trench excavation and ductbank installation, and replace asphalt in this ductbank location. Please confirm this is acceptable.

ANSWER: This is acceptable. In a future amendment ES105 will be revised, removing the boring requirement.

55. P-9010 – Pol Civil Plans (CF) POL Pipeline Erosion Control Measures Please provide temporary erosion control plans for the POL pipeline between the Seaport Wharf and P-9010 onsite site limits.

ANSWER: Erosion control for the POL pipeline between the Seaport Wharf and the P-9010 site must meet the requirements in the EROSION CONTROL GENERAL NOTES on page GC501.

56. P-9010 – Drawing CF101 and Spec Section 33 52 43.13 para POL Pipeline Marker – Fiberglass Reinforced Resin Foundation Please provide foundation detail for the Fiberglass Reinforced Resin Pipeline Marker located in unpaved areas.

ANSWER: The Reinforced Resin Pipeline Marker does not have a foundation. It must be driven to the depth indicated by the marker manufacturer.

57. P-9010 – Detail C1/E-506 Utility Marker - Concrete Dimension and Strength Please provide dimension and concrete strength for concrete base of utility marker as shown in detail C1/E-506.

ANSWER: In a future amendment, see revised detail C1/E-506 indicating the outline of concrete surrounding the cable marker and 28-day compressive strength of 3000 PSI.

58. P-9030 – Drawing CG102 P-9040 – Drawing CG101 9040 Existing Grade Topography It appears the P-9040 drawing CG102 existing grade contours do not match the P-9030 drawing CG101 Existing Grade or Finish Grade contour lines. Please advise.

ANSWER: The grading plan for P-9030 depicts the existing condition for the P-9040 project.

59. P-9030 - Drawings CU104 and CU107 Utility Plan R1 Connection to Existing Water Well P-9030 drawing CU107 Structure Table Item 545 states “Connect to Water Well Line re: Well drawings for Connection.” Please provide Existing Well drawings for connection information.

ANSWER: Detail A2/CU504 has been added to clarify the existing condition at the well and where the piping from the well terminates. The waterline connects to the plug shown in the detail. Please refer to the amended drawings in a future amendment.

60. In Part D specifications for Project P-9010, Specification Sections 33 52 43.13 - Aviation Fuel Piping and 33 52 80 - Liquid Fuels Pipeline Coating Systems did not call out any requirements for interior coating (lining) of the carbon steel pipe and fittings, which is typically required for hydrant fuel systems. Please confirm that no interior coating is required for all carbon steel pipe and fittings on this project. It is assumed that all stainless steel pipe and fittings will not require any interior coating.

ANSWER: There is to be no interior coating of any fuel piping and fittings (carbon steel or stainless steel) on the project.

61. On the POL pipeline alignment in areas of clearing and grubbing you show a typical note on Drawing CF131 which states: “Clearing and Grub 3m on each side of pipe.” This is not enough area to complete the construction of the pipeline. We feel you would need at a minimum about 12 meters total for a temporary easement for construction. Will we be allowed to use 12 meters for a temporary easement to construct the pipeline?

ANSWER: A 12-meter-wide path along the fuel line is acceptable for the areas on sheets CF131, CF132, CF133 and CF 134. At a minimum, the contractor must clear and grub 3 meters on each side of the pipe.

62. For Project P-9010, the mechanical drawings (MP010, MP011, MP103, MP021) appear to call out Extra Strong pipe for the Receipt Pipeline from the Marine Connection Pit to the Seaport Pump House, including piping inside the Marine Header Valve Pit. These Extra Strong pipes are denoted as “DN250-CS(XS), DN200-CS(XS) and DN150-CS(XS)” on the drawings.

Specification Section 33 52 43.13 only calls out Schedule 40 for carbon steel piping DN65 through DN250 and does not mention Extra Strong wall thickness. Please confirm whether the Receipt Pipeline shall require Extra Strong pipe as noted in the mechanical drawings, and whether the fittings shall also require Extra Strong to match the pipe.

ANSWER: As shown on the drawings, the receipt pipeline between the Marine Connection Pit to the Seaport Fuel Pumphouse is to be Extra Strong carbon steel pipe. Provide extra strong fittings of the same wall thickness as the adjoining pipe. See future amendment for updates to UFGS Section 33 52 43.13.

63. For Project P-9010, Drawing B1/SP501 shows a requirement for Fuel Resistant Epoxy Resin coating to be applied below the 75mm grout surface below the steel tank flooring. In what specification section is this material specified?

ANSWER: Tank note 12 of SP001 states to provide a fuel resistant epoxy resin coating to MIL- DTL-24441. There is no additional specification section.

64. For Project P-9010, Drawing B1/SP501 shows a waterproofing membrane to be placed (we are assuming) below the 50mm of grout on the tank slab foundation. We also see this requirement for the tank top roof slab waterproofing membrane below the 50mm grout. In what specification section is this material specified?

ANSWER: The waterproofing membrane is placed below the 50 mm grout layer for the floor and roof slabs. Tank notes 11 and 14 of SP001 state to provide a waterproofing membrane to ASTM E1745. There is no additional specification section.

65. For Project P-9010, Drawing B1/SP501 shows a geonet material to be placed on the steel tank wall surface and covered with a geomembrane. Please provide the specification section in which the geonet and the geomembrane are specified

ANSWER: The geonet material is addressed in UFGS Section 31 32 19.13 Geogrid Soil Stabilization. The geomembrane is addressed in UFGS Section 33 56 19 Fuel Impermeable Liner System.

66. For Project P-9010, Drawing B1/SP501 shows a protection board and waterproofing membrane under all fill materials on the tank concrete wall surfaces. Please provide the specification section in which the protection board and waterproofing materials are specified

ANSWER: Response is deferred.

67. For Project P-9010, Part D, Specification Section 33 52 43.11, Paragraph 2.10, requires Scully modules to connect to PCP (dwg EI702, EI703), but Drawing EP111, Item 083 and EI801 indicate Scully Level Control Panel and Instrument schedule have float switches. Additional relay contacts for pump interlocks based on Specification section 33 09 53, Paragraph 3.3, Control System Sequence of Operation are required for hardwiring to each pump individual pump circuit. Due to this conflict, please identify which requirement to follow.

ANSWER: Response is deferred.

68. For Project P-9010, Part D, Specification Section 33 09 53, Paragraph 2.1.16.1, a desktop PC is specified with: “… recording, tracking, trending and printing software,” but no connections are indicated from devices to PC to provide monitoring (Pressure, Flow, Pump Status, Runtime, etc.). Specification 3.1.12 Personal Computer requires Screens with ability to make setpoint changes for devices that do not provide these abilities (Flow, Level and Pressure switches). No desktop PC is shown in the Control Room layout (EP111) and no Printer is specified.

ANSWER: Computer location will be added on EP111. Reference keynote 051. The PC is a stand-alone computer for manual operator data entry of levels and flows. The specification will be revised om a future amendment. A printer is not required, the specification language will be revised.

69. For Project P-9010, can the contractor assume that all time delay relays and control relays shown in Control Circuit Schematic drawings EI651-EI652 for Pump Control are to be located inside SPCP and HPCP and not in the Motor Control Center?

70. For Project P-9010, Part D, Specification Section 33 09 53, Paragraph 2.1.15, requires three horns and two sirens, but EI801 displays one buzzer, one horn, and one alarm strobe. No specification is provided for alarm buzzer or strobes. No devices are indicated on the building exterior layouts. Please clarify.

ANSWER: The specification is correct. EI801 and EI802 will be revised in a future amendment and the horns added to EP111 and EP112 Circuits will be revised on EI662 AND

EI663 .

71. The prevailing wage information provided in Amendment #2 states: “If the contract is entered into on or after January 30, 2022, or the contract is renewed or extended (e.g., an option is exercised) on or after January 30, 2022, Executive Order 14026 generally applies to the contract. The contractor must pay all covered workers at least $15.00 per hour (or the applicable wage rate on this wage determination, if it is higher) for all hour spent performing on that contact in 2022. The applicable Executive Order minimum wage will be adjusted annually.” Will the $15.00 per hour wage rate apply to this project? What are we to assume for adjusted annual minimum wages after this rate?

ANSWER: Please see Amendment 0003 that was issued on 8 March 2022.

72. Proprietary products. Please identify which items are required from a proprietary manufacturer or specific model on this project. If there are any, please provide the Justification and Approval documentation for this and identify three viable manufacturers for each of the identified proprietary items for the contractors to contact to receive competitive quotations.

ANSWER: Response is deferred.

73. The P-9010 project includes pricing for the ASTM A358 stainless steel pipe for the hydrant fuel loop. Given the 240-day evaluation period prior to award, the length of time between award, followed by approval of submittals prior to release of the stainless steel for fabrication, and the huge volatility of stainless-steel prices, we find a potential risk of approximately $250,000 to $500,000 for the stainless-steel pipe material in Section 33 52 43.13 - Aviation Fuel Piping. To allow for more accurate price proposals without contingencies on the contractors, would the Government consider including an economic price adjustment clause such as FAR 52.216-2 Economic Price Adjustment-Standard Supplies, or a separate pricing CLIN that would allow for an adjustment in price if the market shifted more than 15% +/-?

ANSWER: Response is deferred.

74. For Project P-9010, Part D, Specification Section 33 52 43.13, Paragraph 2.1.5.4, is calling out insulating gaskets with fluoroelastomer (FKM), commonly referred to as Viton, O-ring sealing surfaces, mylar insulating sleeves, and phenolic insulating washers. The Insulating Flange Kit Detail on A1/EK506 shows G10 insulating gasket, G10 insulating sleeves, and G10 insulating washers, which is different than Specification Section 33 52 43.13, Paragraph 2.1.5.4.

Please clarify and confirm if the contractor is to provide insulating flange kits per Specification Section 33 52 43.13, Paragraph 2.1.5.4, or per Detail A1/EK506 with all G10 material.

ANSWER: The materials should comply with detail A1/EK506 and are specified in UFGS Section 26 42 19.00 20, paragraph 2.6. UFGS Section 33 52 43.13 Paragraph 2.1.5.4 will be revised in a future amendment to eliminate the conflicting material.

75. For Project P-9010, Part D, Specification Section 33 52 23.15, Paragraph 3.2.2 NDE Testing Frequency, states that all pipe field welds must be examined by radiographic methods to determine conformance to the paragraph ACCEPTANCE STANDARDS. Please confirm whether radiographic testing equipment will be allowed on the island of Tinian in order to perform the radiographic testing. If radiographic testing equipment is not allowed on Tinian, what alternate testing methods will be acceptable?

ANSWER: The Government is not aware of any current restrictions that would prevent the use of radiographic testing (RT) equipment on the island of Tinian. However, Phased Array UT (PAUT) is allowed per Section 33 52 23.15 as an acceptable substitute for RT. The acceptance criteria for PAUT is the same as the acceptance criteria for radiography, as defined in Section 33 52 23.15, paragraph 3.3. The contractor should note that if the use of PAUT is selected in lieu of radiography, meeting the radiographic standards for PAUT requires a calibration standard within the requirements of ASME Section V, and meeting the diameter, thicknesses, and flaws that can be detected with radiography.

76. For Project P-9010, Drawing SP110 Vault Cover Schedule shows the required dimensions and sizes for the rolling pit covers. The “L” and “S” dimensions shown for the rolling pit covers are wider than the width of standard shipping containers or flat racks and cannot be shipped to Tinian. Would the contractors and/or manufacturers of the rolling pit covers be able to design the pit covers and frames in half sections such that the halves can be bolted together during installation in the field? Having the half sections will allow the rolling pit covers to fit into standard shipping containers and flat racks for transport to Tinian.

77. For Project P-9010, Part D, Specification Section 33 52 43.13, Paragraph 2.1.1(c), calls for seamless schedule 160 carbon steel piping for sizes 2-inch and smaller. Paragraph 2.1.5.2(b) calls out 3,000-lb carbon steel forged socket weld fittings for sizes 2-inch and smaller. Please clarify whether 6,000-lb forged socket weld fittings are required for sizes 2-inch and smaller in order to match the schedule 160 carbon steel piping.

ANSWER: Response is deferred.

78. For Project P-9030, Part B, Specification Section 33 16 15, Paragraph 2.1.1, calls for the water tank to be designed for a snow load of 1.2 kPa. Please clarify and confirm whether the water tank shall be designed for a snow load, even though Tinian receives no annual snow.

ANSWER: See future amendment. Fire water storage tank is not required to be designed for a snow load.

79. For Project P-9030, Part B, Specification Section 33 16 15, Paragraph 2.2.1, calls for A36 steel to have a minimum thickness of 9.5 mm (0.375-inch). Typically, this thickness would be a call-out for the tank shell only. Please confirm that all steel plate, i.e., shell, floor, roof, etc., for the water tank is required to be 9.5 mm (0.375-inch) thick. Typically, a water tank of this size would be 0.25-inch floor, 0.25-inch shell, and 0.1875-inch roof. The specification is also calling out to use A36 modified grade steel. Typically, this grade of steel is used in cold climates and would require a snow load factor for the roof.

ANSWER: The steel is to meet the requirements of ASTM A36 and the latest requirements of AWWA D100. The minimum thickness is 9.5 mm.

80. For Project P-9030, Part B, Specification Section 33 16 15, Paragraph 2.3.1.3, calls for a pressure/vacuum vent that won’t fail in freezing or cold temperatures. Please confirm whether this is necessary for Tinian. Typically, a standard atmospheric tank vent that conforms to AWWA and NFPA 22 standard should be good for this water tank.

ANSWER: See future amendment. Fire water storage tank vent is required in accordance with NFPA 22, but no considerations for freezing temperatures are required.

81. For Project P-9010, Drawings MP019 and MP514 show the two Isolation Valve Stations for the new Transfer Pipeline. These drawings and notes do not identify whether all the flanges for the Valve Stations shall be 150# or 300# flanges. Please confirm whether all the flanges shown for the two Isolation Valve Stations shall be 150# or 300# flanges.

ANSWER: As shown on MP012 and MP018, the entirety of the transfer pipeline, including MP019, is Class 300. All of the flanges and components at the two valve stations (VS-1 and VS-

2) in the transfer pipeline are to be Class 300.

82. For Project P-9010, Drawing MP019 shows eleven (11) HPV/LPD Pits for the new Transfer Pipeline. The drawings and notes do not identify whether all the flanges inside the HPV/LPD Pits shall be 150# or 300# flanges. Please confirm whether all the flanges inside these HPV/LPD Pits shall be 150# or 300# flanges.

ANSWER: As shown on MP012 and MP018, the entirety of the transfer pipeline, including MP019, is Class 300. All of the flanges and components inside the HPV/LPD Pits of the transfer pipeline are to be Class 300.

83. All projects. Please confirm that the available water source for hydrostatic testing of the tanks and pipeline flushing will not pose a risk for microbial-induced corrosion.

NOTICE NO. 3

84. P-9030 Dwgs. E-505, E-506, E-601 and Spec. section 33 71 01 45 ft. Overhead Power Pole Foundation P-9030 Spec section 33 71 01 para. 3.1.1 states “Concrete poles shall be embedded in accordance with the detail provided in the drawings.” Details on drawings E-505 and E-506 do not show a concrete foundation for the Overhead Power Poles. Please provide foundation detail for Overhead Power Poles.

ANSWER: Response is deferred.

85. P-9030 Dwg. ES136 and detail C4/E-502 Communication Ductbank Under Existing Airport Access Road P-9030 drawing ES136 instructs to bore approximately 60 LF under the Airport Access Road to ensure no roadway outage. We ask that typical trench and ductbank section be allowed at this location, due to the minimal time to complete the ductbank improvement (1 day) and the high costs to mobilize boring equipment and operator to Tinian for the small quantity. Please advise if traditional ductbank construction may be utilized.

ANSWER: Response is deferred.

86. P-9010 - CS and CF site plans, detail C1/CS506 and spec section 05 50 13 P-9010 Bollard DiameterThe various Civil Site plans and bollard detail calls for 4-inch diameter bollard, whereas the specs call for 6-inch diameter.

Please advise which to follow.

ANSWER: Response is deferred.

87. P-9040 – dwgs. CU101 and CU500 and spec section 05 50 13 P-9040 Bollard Detail Are bollards required at the fire hydrants on P-9040? If so, please provide detail for bollards on P-9040 and confirm diameter, as the spec section calls for 6” diameter.

ANSWER: Response is deferred.

88. Ref. Drawing; P-9010 : SB103 Future Truck Fill Stand Please confirm if the future truck fill stand is part of the scope of work for P-9010 and provide location in the site plan.

89. Ref. Drawing; P-9010 : SP108 Cross-Over Valve Pit: Aluminum Grating/ Galvanized H- Beam Ledger angles and grating are aluminum; H-beam is galvanized wide flange. There may be a potential oxidation issue between the aluminum grating and galvanized beam. Please confirm whether to proceed as it is.

90. Construction Waste Disposal Please advise if non-hazardous construction waste may be disposed of at the Tinian Landfill.

ANSWER: Response is deferred.

91. Ref. Drawing; P-9010: SP002, & Notice No. 2 Response on Question No. 30 P-9010:

Epoxy Coated Rebar The response to Notice No. 2 Question No. 30 has confirmed the epoxy coated rebar requirements for P-9010 but reference drawing: SP002 has indicated NO epoxy coated rebar for Storage Tanks. Please clarify.