18-R-0001_Q&A.pdf

Pre-Bid Contractor Questions & Government Responses Renovate Bldg 8130 - Remediation 27 November 2017 FNWZ 18-0009

Contractor Scope of Work (CSOW):

1. Section 2.5.2 Define meaning of “horizontal” surfaces.

Gov’t Response: Remove “horizontal” from paragraph.

2. Section 2.5.6.1/2.5.6.2 Please confirm the number of sample tests the CO will require for heavy metal verification for final clearance.

Gov’t Response: The Contractor shall expect to take & test three samples in each of the following locations upon Contractor’s anticipated completion of each Phase; (3) floor, (3) walls, (2) columns & joists, (2) randomly determined locations.

3. Section 2.5.2 Please clarify if the contractor will be required to clean inside any cabinets, tool boxes, drawers etc.

Gov’t Response: Cabinets & toolboxes will be locked. Contractor shall clean exterior surface only.

4. Section 2.5.2 Please clarify if the contractor will be required to move all furniture, office furniture, computers, etc. along with other mentioned items prior to cleaning.

Gov’t Response: Contractor will not be required to move furniture except to properly clean all remaining furniture’s surfaces.

5. Section 2.5.1 The Contractor is responsible for removal of all hexavalent chromium, lead dust, and cadmium from facility. It appears as if the clearance criteria for the project consists of wipe samples of cleaned surfaces. In our experience, the wipe samples would inadvertently collect lead from the painted surface and elevate the samples, reflecting the lead in the paint and not the dust.

Would the Government take this into consideration when collecting clearance samples or would the contractor be responsible for removal of the lead paint as well to allow for a Non‐Detect via sampling?

Gov’t Response: Sampling for lead will not be a requirement of the project. Cleaning of hex chrome will remove the majority of lead dust in the facility.

6. Section 2.5.1 Confirmation via wipe sampling of the remediation will include a minimum detection level (MDL) or minimum reporting limit (MRL) from the laboratory, which defines the minimum amount that the laboratory is able to identify by the selected analytical method. Ideally, this is extremely low, but is greater than 0.00 ug/m3.

Would the Government accept Non‐Detect (ND) via an accepted method for noted in Section 2.5.6.3 as clearance criteria in place of removal of all dust?

Gov’t Response: The facility shall be cleaned so the results from swipe sampling show 'Non-Detect' using NIOSH method 7605 or equivalent.

7. During the site walk, it was noted a large piece of equipment in the center of Main Metal Shop (124) would be cleaned and protected by others. Would the Contractor be responsible for any clearance sampling, additional protection, wrapping in polyethylene sheeting, or installation of scaffolding to protect from above?

Gov’t Response: The government will ensure the tubing bender will be covered & protected with plastic sheathing & minimal framing. Contractor shall ensure nothing is dropped onto unit and is not responsible for remediation on or below the tubing bender.

8. Some electronic equipment such as computers, monitors and televisions cannot be opened or cleaned out without damage to the units (specifically from water). In the event that a similar unit cannot be cleaned without damage to the unit, can the Contractor assume that these materials will require proper disposal in accordance with proper AF inventory protocols in place of cleaning?

Gov’t Response: Contractor shall only clean the exterior of computers, monitors, & televisions.

Pre-Bid Contractor Questions & Government Responses Renovate Bldg 8130 - Remediation 27 November 2017 FNWZ 18-0009

9. Contractor noted two large HVAC units in Room 122 and 120 as well as some smaller units present throughout the building. As these units are pre‐fabricated offsite and installed in manners that will not allow access to the complete interior of the unit for cleaning, will the AF be content with cleaning only the assessable portions of these systems? Note; this does not include the associated HVAC ducting which is anticipated to be cleaned in accordance with the SOW.

Gov’t Response: Units must be completely cleaned of all heavy metals according to Section 2.5.

Many of these units will be removed under a future contract & cannot be contaminated at that time.

10. Will the facility be closed for remediation/abatement activities for the duration of the project?

Gov’t Response: No. Refer to CSOW 3.1 & Attachment A Phasing Plan.

11. Will the concrete under equipment, raw materials, etc. apply?

Gov’t Response: Per CSOW 2.5.2, all surfaces shall be remediated. Surfaces below equipment unable to be moved by personnel (without aid of hoists etc.) will not require remediation. Toolboxes, small equipment, boxes, material, etc. that can be can be moved without unreasonable effort, shall have surfaces below/around remediated.

Note: All loose sheet metal & loose tubing shall be removed by the government prior to remediation contractor arrival.

12. Has a 60% (+) reduction in levels followed by encapsulation be considered? Block is very porous, multiple extraction attempts may push the contaminants further into the block and generate a false positive.

Gov’t Response: All surfaces shall be remediated of hexavalent chromium, lead dust, and cadmium from facility. In the future the facility will be renovated therefore encapsulation is not an option.

13. Are the large HVAC main ducts lined or insulated?

Gov’t Response: Contractor shall assume the interior surface of duct is lined on visibly painted ductwork (& unpainted duct in Mechanical room). Some ductwork above the offices is exterior insulated.

14. It would be impossible to physically wet wipe all internal components of the air handling units. Will HEPA scrubbed positive pressure methods be acceptable?

Gov’t Response: Contractor may HEPA scrub the interior of HVAC units. Contractor shall still comply with CSOW for remediation of hexavalent chromium, lead dust, and cadmium from facility.

15. Light switches and outlet “J” Boxes, Bus Bars, Circuit boards and conduit. What are the decontamination expectations?

Gov’t Response: Interior of j-boxes, circuit breaker panel internals, or electrical conduit shall not be cleaned. Only exterior surfaces & breaker surfaces/back of breaker doors shall be cleaned.

16. VR-8 and 55100 Jet Machines require draining and the assistance of a certified operator to move components for cleaning. Moving components will require de-energizing (lock out/tag out) after each move and re-energizing for the next move. What will the decontamination procedures be?

Gov’t Response: VR-8 and 55100 Jet Machines shall only be required to wipe the exterior of the unit. No moving or de-energizing required.

17. Electric motors, stands, feet, bottoms, etc. Should we plan to bring heavy equipment and rigging to lift, and clean the stands, feet and bottoms? Recommendations for electric motors?

Gov’t Response: Surfaces below equipment unable to be moved by personnel (without aid of hoists etc.) will not require remediation. Only exterior surface of electric motors shall be remediated.

Pre-Bid Contractor Questions & Government Responses Renovate Bldg 8130 - Remediation 27 November 2017 FNWZ 18-0009

18. How will porous materials be managed? Rolls of padding/fabric in storage room.

Gov’t Response: Rolls of padding/fabric will be removed by Government prior to remediation contractor arrival.

19. How will porous materials be managed? Posters, paperwork, etc.

Gov’t Response: Remaining posters/paperwork shall be remediated.

Attachment A – Phasing Plan

20. Can the Contractor assume a single mobilization to encompass all three phases (i.e. will the Contractor be able to move from one phase to the next with no interruption in progress) or will there be a delay after the clearance of each phase to allow for transferring of people and equipment that will require a limited demobilization after each phase?

Gov’t Response: Contractor will be allowed to move from one phase to the next provided the Section

2.5.6 sampling results are negative for heavy metals & asbestos has been abated.