Contractor SOW Questions Responses 16 Feb 10.docx

147 Reconnaissance Wing, Ellington JRB, Tx Contractor SOW Questions FWJH092456 Pre-Fabricated Bonding/Layout Room B1295

QUESTION:

Your original scope states class 300,000 which does not require HEPA filtration as used in class 100,000 environments and will still achieve .03 micron specs and in turn have a considerable cost savings.

ANSWER:

The requirement is for Interior Modular Class 2, 300,000 Cleanroom @.3 Micron

QUESTION:

I do have the revision and noticed a specific model number called out.

It appears to be Allied. Are you accepting equal or is this a single source bid?

ANSWER:

Any reference to a particular make and model are being used for example only. An equivalent or equal will be accepted for all items under this contract.

QUESTION:

The scope stated class 300,000 ISO 8.5 and also class 100,000 which is ISO 8, I want to let you know there is considerable differences between these classifications.

ANSWER:

The requirement is for Interior Modular Class 2, 300,000 Cleanroom @.3 Micron

QUESTION:

Section 1.6 paragraph “A” License is not required per Houston building department. Please confirm?

ANSWER:

City of Houston building codes do not apply to the Ellington Field. Federal Government Unified Facility Code, USAF and ANG regulations apply. ANG Requires fire protection systems to be stamped by a licensed Fire Protection Engineer.

QUESTION:

3.4 Classification

Spec calls out “Integra 400” what is that?

ANSWER:

Any reference to a particular make and model are being used for example only. An equivalent or equal will be accepted for all items under this contract.

QUESTION:

Class 300,000 is called out and then reads on to say “as built class 100,000”. Please clarify which is required.

ANSWER:

The requirement is for Interior Modular Class 2, 300,000 Cleanroom @.3 Micron

QUESTION:

Class 100,000 is ISO Level 8 (NOT 8.5)

ANSWER:

The requirement is for Interior Modular Class 2, 300,000 Cleanroom @.3 Micron Disregard reference to Class 100,000

Question:

Class 300,000 is BS-5295 What is allowable particulate size? .3 or .5?

Answer:

The allowable particulate size is .3 micron.

Question:

Please note there are many differences between the class 100,000 and 300,000 standards and if not evaluated carefully may have considerable cost savings. Class 300,000 has a considerable cost savings.

ANSWER:

The requirement is for Interior Modular Class 2, 300,000 Cleanroom @.3 Micron

QUESTION:

HAVC control calls out at 5 TON TX split system. This is overkill and not required if class 300,000 is required.

ANSWER:

Provide a DX Split HVAC unit capable of accommodating the temperature and humidity requirements will be provided, 15 seer, 20 fin unit with heresite protective coating

QUESTION:

Air Filtration Please advise where the ISO 8.5 information came from?

According to ISO 14644-1 Cleanroom Standards the levels are 1 thru 9 (9 being room air) however, BS 5295 has a class 300,000 @ .5, is that what is required?

ANSWER:

The requirement is for Interior Modular Class 2, 300,000 Cleanroom @.3 Micron

Question:

Ductwork Galvanized duct work with inner liner is required for hazardous materials, if not required we can use flex if acceptable?

ANSWER:

Shall be galvanized steel ductwork with inner liner on main trunk line and a single wall snap lock with exterior insulation wrap. Environmental conditions require the use of galvanized.

QUESTION:

Fire Protection Please verify approximation of distance between “Bonding room” and water main?

ANSWER:

Tie onto existing wet system, (approx 30 feet from building)

QUESTION:

Walls state the system is to be 4” thick then states 3-1/2” thick, which is it?

ANSWER:

Wall system shall be 4" min. actual thickness overall.

QUESTION:

Spec stated ENTIRE wall system shall be approved by UL. Firstly, UL does not approve anything! Secondly they do not approve walls (do not offer that service).

ANSWER:

Disregard entry for wall to be UL approved.

QUESTION:

Electrical Do you require a transformer? If unknown, this will result in a change order.

ANSWER:

A step down transformer could be required depending on the system awarded. The building electrical capability is identified. The contractor shall be responsible for purchasing this piece of equipment as part of this proposal if the awarded system is non compliant with the buildings capability identified in the SOW.

QUESTION:

Upon equipment (room) completion will the area be ready to bring power to to “test” before our install team leaves the facility?

ANSWER:

All testing shall be conducted to ensure the facility is complete and usable before the installation team leaves the site.

QUESTION:

Lights Cleanroom “sealed double gasketed” lights are not required if class 300,000 is what is needed. Standard troffers are acceptable if room is positive pressure.

ANSWER:

The requirement is for Interior Modular Class 2, 300,000 Cleanroom @.3 Micron, standard troffers are acceptable.

QUESTION:

12ea Fan powered HEPA units @ 0.3 micron particles is NOT required for class 300,000 operation only slight positive. RSR (room side replaceable) filters are required where low plenum tolerances are. These units are very pricey and not necessary.

ANSWER:

The requirement is for Interior Modular Class 2, 300,000 Cleanroom @.3 Micron, therefore, disregard the requirement for HEPA filtration.

QUESTION:

Is there a current layout drawing available?

ANSWER:

Attached

QUESTION:

Is a forklift going to be provided?

ANSWER:

No. It is the responsibility of the contractor to provide all equipment required for completion of this project.