Amendment 6 - Final QnAs.pdf

Final Questions and Answers for W9123820R0055

1. Disposition of excavated materials (all materials underlying existing PCC pavement): The specifications and USACE RFI responses are contradictory about how the contractor is to handle this material. Please see below:

• Section 01 57 19 1.7: Comply with the special environmental requirements listed in AFI 32 and OO-ALC

HAFB Supplement 1. Contractor is required to show all tipping fee receipts to verify that solid waste were disposed of in the appropriate landfill.

All excess soils and construction debris shall be transported to a permitted landfill off base. Surplus material or other soil material not required or suitable for filling or backfilling, and brush, refuse, stumps, roots, and timber shall be removed from Government property and properly disposed of in accordance with all applicable laws and regulations

• Section 31 00 00 3.1: Dispose surplus satisfactory excavated material not required for fill or embankment in areas approved for surplus material storage or designated waste areas.

• Section 31 00 00 3.6: Dispose of unsatisfactory material and any surplus satisfactory material, in accordance with paragraph "DISPOSITION OF SURPLUS MATERIAL".

• Section 31 00 00 3.13: Surplus material or other soil material not required or suitable for filling or backfilling, and brush, refuse, stumps, roots, and timber shall be removed from Government property and properly disposed of in accordance with all applicable laws and regulations.

As you can see from the items above, the specifications are not clear about what the contractor is to do with the excavated material. This is an important item for us due to our recent experience with a project at Hill.

Prior to this most recent project, we have been allowed to dispose of excess excavation materials either on the base or off the base at a location of our choice. We based our most recent project estimate on our past experience and it cost us a significant amount of money because in addition to following specification section 31 00 00, we were held to section 01 57 19 too, and had to haul all our excess material to certified landfill.

This issue is a significant cost potential for this project. Approximately 30,000 cy of material will be excavated with the West Apron project. If that all needs to go to a certified landfill, the tipping fees alone could be hundreds of thousands of dollars. Please provide clear direction on how the excess material is to be handled so all bidders can include the appropriate costs in their estimates and there are no surprises for the government or successful contractor during project construction.

3.13 gives disposition requirements for earth and debris. 3.6 already correctly refers to 3.13, and amendment 5 corrects 3.1 which now references 3.13.

01 57 19 1.7 – See attached revised spec which crosses out the last sentence and adds the following verbiage “Surplus material or other soil material not required or suitable for filling or backfilling, and brush, refuse, stumps, roots, and timber shall be removed from Government property and properly disposed of in accordance with all applicable laws and regulations.”

2. Fire line tie-in: The USACE has stated that the fire line we are to remove and replace is active, without providing any further information. Please provide additional information about how contractor is allowed shut down fire line and maintain fire service, duration of shutdown, etc. In order to remove and replace the line it will have to be deactivated during construction.

Outage requirements are stated in Specification Section Sections 01 00 00, 01 11 00, and 01 35

26. 01 00 00 Paragraph 1.10 indicates that outages are to be as short a duration as possible. It is up to the Contractor to plan the connections from new to existing fire line and demolish existing piping.

3. Haul road repairs - Note 17 on sheet G-102 states that contractor is responsible to repair any and all damage to “…existing AC or PCC pavement, including haul routes…”. A portion of the designated haul route contains significant, existing road damage and hauling the broken concrete over this road will cause further damage. In order to level the field for all bidders, it would be helpful for the USACE to specify what portions of the road need to be repaired and what the repair requirements (dimensions, depth, materials, etc.) are.

Perhaps one way to account for this work would be to create a contingency item with requirements as directed by the USACE. This will help reduce risk and eliminate contractors guessing what repairs need to be made.

Note 17 indicates that Contractor shall identify and document any pre-existing damage to existing pavements prior to starting work. Document existing damage prior to starting work. See previous bidder inquiry.

4. PCC pavement crushing – Note 53 on sheet G-102 states, “The contractor should recycle the removed PCC on base, at concrete recycling lot, and crushed to 1” and 6” maximum in size with a crusher at the contractors expense.” Please clarify crushing requirements. Based on the USACEs previous answer and the note referenced above, there appears to be two crushing scenarios:

• Scenario 1 (as noted on sheet G-102): Contractor crushes all PCC to 1” and 6” minimum (as written in note 17). Because of the word minimum contractor could crush material to any size, so long as it is greater than 1” and 6”.

• Scenario 2 (as per RFI response): Contractor crushes 20-25% of total PCC into 6” size and the rest into 1” size, meaning there are no fines left with the crushed material. The USACE will be left with piles of 6” rocks and 1” rocks. Contractor is further directed to “Dispose [of] the remaining material per specification.”. What does this mean? Is contractor disposing of all material finer than 1”? Where is contractor to haul the material to dispose of it?

• A possible third scenario (which aligns with our prior experience at HAFB) is that we crush the PCC to 6” minus and 1” minus materials, and leave the UAACE with a pile of stabilization cobble and a pile of roadbase-like material as we have done on previous projects.

The recycled PCC size shall be crushed into 1" and 6" size. Produce 20-25% of total PCC to 6" size and then crush the rest into 1" size.

1. 8718534 and 8718625

a. These two inquiries ask the same question.

b. There is no way to bid this section of the specifications if there is no way of having a ASTM E1274 (32 12 15.13 paragraphs 1.5.4.2.2, 2.1.1.2, and 2.1.1.4.2) approved California Type Profilograph to perform the work. This type of Profilograph is not used in Utah. A High Speed Inertial Profilograph will give the same results as a CA type profilograph.

https://www.smoothroad.com/cs8500-california-profilograph

If the contractor needs to rent a California profilograph there is link to rent equipment. We have not had good results with high speed profilers as they are usually mounted on vehicles are too heavy to be on the slab in the 2 days after paving.

2. 8718566

a. The response to this inquiry just states to read through paragraph 1.4.1.b of 32 13 14.13 to find the role of the ACI Transportation Inspector. Paragraph 1.4.1.b says, “The ACI Transportation Inspector is required to be present at the paving site during all paving operations, with the exception of the initial saw cutting operation.” The only thing I know about the ACI Transportation Inspector from that paragraph is that he needs to be present whenever paving operations are happening. What does this inspector do during paving operations?

Oversees and ensures work is being properly performed. Typically, one of the KTR’s employees (or concrete subs) will have this certification.

3. 8718654 and 8718817

a. From inquiry 8718654. Paragraph 2.11.1.3 outlines tolerances for concrete materials used in volumetric batching equipment; Cementitious Materials, Aggregate, Water, and Admixture. These tolerances will be recorded on each batch ticket.

Yes, this will be recorded in each batch ticket.

b. From inquiry 8718817. Are the tolerances outlined in 2.11.1.3, need to be recorded and reported weekly to the government to meet the requirements of this section of Table 6? If not, then what needs to be recorded and reported to the government weekly?

This will be part of the Quality Control Plan that will be submitted post award and review/approved by the Government.