Bldg_898_Q A.docx

FA4801-15-R-0029 Q&A’s 898 Paintbooth Retrofit Question: Who will have the responsibility of removal and disposal of all the existing booth filters (exhaust/supply/carbon) Government or contractor?

Answer: Contractor

Question: Will the contractor be installing all new filters in the exhaust and supply as part of our scope of work?

Answer: Yes, in order to baseline everything for the new system, all filters are req'd to be new

Question: Should the contractor assume that new carbon filters will not be required?

Answer: No, the contractor should design their proposal to meet OSHA/AFOSH requirements. It is our desire to remove carbon filters if it is legal to prevent high costs of maintenance in the future however, if their proposal determines carbon filters are required, then just a change during retrofit will suffice.

Question: Do the coatings on the F-15 / F-16 require NESHAP 319 compliance or is a lesser NESHAP compliance acceptable? If so, what compliance level is required?

Answer: As Holloman AFB is not a major source of hazardous air pollutants (HAP), the retrofitted paint booth will not be required to install a Method 319 compliant Filter System. As for what alternative compliance level is required, a paint booth would ordinarily be required to meet EPA's Control Technique Guidelines (CTG) to limit VOCs. However, as Holloman AFB's construction and operating permits do not incorporate the CTG for the existing paint booths, the CTG will not apply to the retrofitted paint booth.

Question: Is the intent to remove the 80/20 capability of the booth?

Answer: No, the capability must comply with the UFC. Please see Appendix D of the UFC for detailed information.

Question: Should the new system accomplish 100FPM air velocity through the cross section of the existing cabin?

Answer: No, according to the UFC (attached) the 100FPM is only required when using Conventional Air atomization, we don't use that as we have HVLP. We require 75 or more

Question: Will base safety/bio accept an 80/20 design without a Carbon array?

Answer: Regarding the carbon filtration requirement, the Clean Air Act does not require area HAP sources, such as HAFB, to use them. However, there may be other OSHA requirements on this subject. They can't assume the carbon filters will not be required. They are part of the design which allows the booths to operate with 80% recirculated air. If we are retaining the 80/20 capability, they can assume that the carbon filters will be required, along with the VOC and LEL monitoring capabilities. Please see Appendix D of the UFC for detailed information.

The system should be designed to provide 75 fpm cross-sectional airflow in spray mode to ensure the booth can provide 60 fpm, which is required for HVLP spraying (ACGIH Industrial Ventilation Manual, Fig. VS-75-04; see also Figure D-1 of the UFC).

There should be at least one other mode which provides 50 fpm for brush/roll and curing to reduce airflow requirements during these operations.