Loren Data's SAM Daily™

FBO DAILY ISSUE OF SEPTEMBER 14, 2007 FBO #2118
MODIFICATION

41 -- AMENDMENT 0001 TO CBR FILTER UNITS

Notice Date

9/12/2007
 

Notice Type

Modification
 

NAICS

423730 — Warm Air Heating and Air-Conditioning Equipment and Supplies Merchant Wholesalers
 

Contracting Office

ACA, Aberdeen Proving Ground, Directorate of Contracting, 4118 Susquehanna Avenue, Aberdeen Proving Ground, MD 21005-3013
 

ZIP Code

21005-3013
 

Solicitation Number

W91ZLK-07-T-0800
 

Response Due

9/18/2007
 

Archive Date

11/17/2007
 

Small Business Set-Aside

N/A
 

Description

THIS AMENDMENT IS ISSUED TO PROVIDE ANSWERS TO QUESTIONS AND TO EXTEND THE CLOSING DATE OF THE SOLICITATION TO TUESDAY, SEPTEMBER 18, 2007 AT 10:00 AM EASTERN TIME. SOLICITATION IS ALSO AMENDED TO INCLUDE THE FOLLOWING: 1. Period of performance will be 12 months from date of award to allow for Government coordination work and preparation. The Government is required to prepare the pads and remove the old contaminated systems as well as making final connection between new and existing duct work. 2. The preferred control system to be used on Aberdeen Proving Ground is Johnson Controls Metasys. 3. The variable frequency drives shall have manual bypass to allow system to run in the event of drive failure. 4. The JACE control module in CL IN 0001 section B shall connect all new and existing VFDs and CBR controls into the building PC based desktop workstation. The new control module shall enable the building operator to monitor and control all CBR functions from the work station. Air flow and set points for the drives. 5. CLIN 0002 filter systems shall include the magnahelic gages, piping and weather shields. These were mistakenly listed as an option. 6. FIF 120 CFM DRAWING AND FIF 1200 CFM HOUSING DRAWING are available. Please contact Barbara Kuklinski at barbara.kuklinski@us.army.mil to request a copy of the drawings. QUESTIONS AND ANSWERS ARE AS FOLLOWS: QUESTIONS AND ANSWERS CLIN 0001 & CLIN 0002: QUESTION 1. What is the size of the required duct connect ion? Answer: Duct connection varies per system from 14 diameter minimum to 24 diameter maximum. Majority of systems approximately 20 diameter. QUESTION 2. How is connection to be made? Welded or bolted. Answer: Government provided Gov ernment installed coupling to bridge 4 gap between old and new duct work. Contractor to match existing duct size at the connection. Contractor to provide all welded duct with an absolute minimum of flanged bolted connections. QUESTION 3. Does the requirement to have a Quality Assurance Program that meets the requirements of ASME NQA-1 apply to the installing contractor? Answer: YES. QUESTION 4. Would the following HEPA filters be acceptable? HEPA filter would not have a 0.7 5 x 0.75 double turned flange as required by ASME AG-1, FIG. FC-4110-1; HEPA filter would not have faceguards installed in each face of the filter as required by ASME AG-1, Article FC-4160; HEPA filter media pack would exceed the 0.75 limit as required by ASME AG-1, Article FC-4130 (b). Answer: AG-1 takes precedence in the event of a conflict with other specifications. AG-1 allows 1500 CFM HEPA 1.3 W.G. for this application use 1500 CFM in lieu of 2000 CFM specified. All Stainless steel construction as per AG-1. Exceptions not acceptable. QUESTION 5. The technical specification requires a HEPA filter with separators, however a HEPA filter rated for 2000 cfm would be without separators? Would a 2000 cfm HEPA filter, without separators be acceptable? Answer: Provide 1500 CFM HEPA WITH separators. QUESTION 6. The technical specification requires the HEPA filters to be UL Class 2 and to be in accordance with ASME AG-1. AG-1 requires HEPA filte rs to be UL Class 1. Which UL Class of filters are required? Answer: Provide UL class 1 as per AG-1. QUESTION 7. The technical specification requires HEPA filters to have a 16 ga. steel frame and to be in accordance with ASME AG- 1. AG-1 requires HEPA filters to have a 14 ga. steel frame. Would a HEPA filter with a 14 ga. steel frame be acceptable? Answer: Provide AG-1 stainless steel HEPA. QUESTION 8. The technical specification requires the HEPA filter s to have a faceplate fabricated from cold rolled steel and to be in accordance with AG-1. ASME AG-1 requires faceplate to be galvanized 4 x 4 mesh. Would a fac eplate fabricated from galvanized 4 x 4 mesh be acceptable? Answer: AG-1 requires all stainless steel construction. Provide stainless steel screens and faceplates. QUESTION 9. The technical specification requires factory testing of the HEPA filters using DOP. DOP is a suspected carcinogen and has be replaces by alternate materials such as POA. Would alternates to DOP for factory testing of the HEPA filters be acceptable? Answer: Alternate test material, Dursayn 164 (polyalphaolefin). QUESTION 10. The te chnical specification requires the pre-filter to be 90%. Should this be 90% average efficiency per ASHRAE Std 52.1? Answer: YES QUESTION 11. Please provide the distance and change in elevation between the CBR filter housings and the MCC and build location of existing building penetrations. Answer: Building and filter pad single story construction slab on grade. MCC and VFD to be located in the mechanical room approximately 200 f rom the filter pad area. Controllers to be located in the corridor inside the lab about half way between the mechanical room and the filter pad. QUESTION 12. What is the required height, diameter and material of the exhau st stack? Answer: RFQ gives option of stack material as stainless steel or aluminum. Stack height shall be 30. Stack diameter 22 inches nominal; partly depends on manufacturers filter design. QUESTION 13. What is the size of the existing pad? Answer: Existing pads to be enlarged by Government after filter housing configuration/design is approved. Dimension of 11 wide by 16 deep is maximum space allowable for filter housing, fan, an d exhaust stack assembly including change out access. QUESTION 14. What is the distance from the inlet and outlet of the CBR filter hosing to wall? Answer: Housing can be 18 to 24 from the wall. Exhaust duct exits the building just below the eaves of the roof (approximately 10-12 from grade). Final housing configuration duct inlet/outlet depends on manufacturer. These are not straight line systems. Custom system configurations for each site are requi red. The existing fire road cannot be intruded upon. Adequate access for change out of filters must be allowed in the housing layout/ configuration. QUESTION 15. Define contractor scope for site testing. Answer: None QUESTION 16. Provide the cost associated with the government testing of the HEPA filters. Answer: HEPA lot acceptance test is $300 per filter tested. QUESTION 17. What are all owable leak requirements for the filter housings? Answer: Acceptance Test criteria: The HEPA filters are considered passing if the penetration of particulate did not exceed 0.03%. Gas filter are considered passing if the vapor penetration did not exceed 0.10%. QUESTION 18. Is the fan required to be stainless steel? Answer: Fan and fan housing may be painted steel 30 year kynar or equal. QUESTION 19. Does the fa n have to meet the requirements of ASME AG-1, Section BA? Answer: Fan shall be capable of 14 W.G. at 5000 CFM, high efficiency radial centrifugal design as per the RFQ. With minimum of 1 year warranty on parts and labor. Externally greasa ble bearings with remote fittings outside of the housing. QUESTION 20. Does the fan casing need to be leak tight? Answer: Casing shall be weather tight not leak tight. QUESTIO N 21. Is there a requirement to provide shaft seals on the fan? Answer: No. QUESTION 22. Does Section C FIF Prototype Module apply only to CLIN 0002? Answer: Section C FIF prototype is a contractor/Government collaboration separate and distinct from CLIN 0002. The manufacturer is to design and construct an upgraded housing prototype based on the GFE M-49 housings that are to be integrated into the filter systems purchased in CLIN 0002. QUESTION 23. What is the available power supply f or the fan motors/VFD? 460/3/60? Answer: Motors and VFDs are 480 volts 3 phase service. QUESTION 24. What is the existing control voltage/type? Answer: Control circuits are 120/20 8 volts single phase. QUESTIONS AND ANSWERS FOR CLIN 0002 ONLY. QUESTION 25. Please provide drawings of the existing 10 tray M-49 housing and tray. Answer: Scanned drawings are available by contact ing Barbara Kuklinski at barbara.kuklinski@us.army.mil. QUESTION 26: What is required fan static for both the 5000 cfm and 3000 cfm systems? Answer: 14 W.G. fan assemblies, the same as specified in CLIN 0001. QUESTION 27. What is the distance from the CBR filter housing to the existing stack? Answer: 15 center to center of existing filter systems to stack. QUESTION 28. Does the designer/fabricator of the prototype door need to have a ASME NQA-1 quality program? Answer: Yes QUESTION 29. What is the type and required thickness of the field insulation? Answer: 2 fib erglass weather sealed. QUESTION 30. How much does the M-49 housing weigh? Answer: M-49 basic housing weighs 382 lbs. Each housing holds 10 filter trays. Each tray weighs 59 lbs. QUEST IONS REGARDING BOTH CLINS: QUESTION 31. One place in the specification calls for four stage filter systems and in another place its states the filter system should be Prefilter-HEPA-Carbon-Carbon-HEPA which is five stages. Which is correct? Answer Correct this is a 5 stage system by another name. QUESTION 32. CLIN 0001 requests a quantity of (5) systems and CLIN 0002 is for a quantity of (2) systems. Is this correct? Answer: Correct QUESTION 33. The static pressure for the 5,000 CFM system is 14 inches W.G. What is the requisite static pressure for the 3,000 CFM system? Answer: Correct all fans are rated at 14 inches W.G. QUESTION 34. Per your sta ted filter schedule, the residence time of 0.125 is inadequate to properly perform the molecular filtration. In order to adequately filter the molecules, a residence time at .25 is more appropriate. In order to meet this residence time, more filters (lar ger systems) are required. Please verify that the 0.125 is the required residence time. Answer: Correct .125 is the residence time per carbon cell. We operate well below rated capacity. QUESTION 35. The specification requ ires the VFD to interface with the building computer. Please elaborate on the interface. Is it one of the following: DeviceNet, Profibus, EtherNet, LonWorks, Johnson Controls METASYS N2, or Siemens APOGEE FLN? Answer: Johnson Control META SYS is employed on APG. QUESTION 36. Is a PLC (programmable logic controller) required with the VFD? Answer: The VFD must track CFM at the filter outlet in order to maintain constant volume to set point as the filters load up .
 

Place of Performance

Address: ACA, Aberdeen Proving Ground Directorate of Contracting, 4118 Susquehanna Avenue Aberdeen Proving Ground MD

Zip Code: 21005-3013

Country: US
 

Record

SN01404242-W 20070914/070913074039 (fbodaily.com)
 

Source

FedBizOpps Link to This Notice
(may not be valid after Archive Date)

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