K--Filter Weighing Room Control Modification

This synopsis is being provided to publish a requirement for the National Vehicle and Fuels Emissions Laboratory (NVFEL) of the Environmental Protection Agency (EPA) in Ann Arbor, Michigan which is seeking an experienced vendor to modify the air conditioning and air handling system for an existing weigh-room to meet requirements of the 2007 regulations for heavy-duty diesel fueled vehicles (40 CFR ?86.1312-2007). The present HVAC is a 5 ton CoolAir unit employing condenser/compressor cooling and flash vaporization humidification. Technical Specifications: 2.1 Structure The existing structure shall be used with only nominal modifications for ducting alterations. Existing suspended HVAC mechanical area shall be used for the new hardware. Existing ducting shall be reused as feasible or newly supplied as necessary for the upgrade equipment. 2.2 Filtration Existing HEPA room filtration media shall be replaced by ULPA filter media (ultra low particulate air filtration system; removal of 99.999% of particulates of size 0.12 microns or greater). The Weigh room shall maintain its Class 1000 rating (1000 particulates of size > 0.3 microns; 350 particulates of size > 0.5 microns; and 0 particulates of size > 5 microns are the maximum numbers permitted per cubic meter of air). The room must be maintained at a minimum of 15 Pa higher air pressure within the Class 1000 room as compared to the adjoining unclassified area. As a required option, the filtration system shall provide for air scrubbing for volatile organic compounds (VOCs), especially compounds in gasoline mixtures. For dry-scrubbing of (VOCs), the air filter system shall contain chemically impregnated media with the ability to reduce organic gases and odors in the intake and recycled air to a level < 1 ppm before it is introduced to the weigh-room. Filtration system must be designed so that filter media is easily replaceable. Filter media must have color change indicator or some other indicator to signal when the media needs to be changed. 2.3 HVAC and Filter Room Control System (FRCS) The control of the new HVAC System shall be based upon an advanced Proportional/Integral/ Differential controller (PID). The system shall cool constantly with PID controlled reheat/preheat and constantly dehumidify with PID controlled humidification. The following are considerations for determining what HVAC Hardware shall be supplied: The HVAC shall be a water-cooled system per facility management choice The HVAC shall incorporate continuous, proportional control for temperature and humidification employing a (PID) controller. This shall be implemented using either a separate Programable Logic Controller (PLC) supplied by the contractor, a separate program module incorporated into the existing EPA weighroom computer system, or a separate computer system supplied by the contractor. Electrical service and plumbing sources/drains are to be brought to the immediate HVAC area by EPA building maintenance or another contractor. The HVAC system shall not emit noise greater than 70 decibels in any direction at a nominal distance of 10 feet from the unit. The HVAC shall be installed in the large soak area that is maintained at a temperature range of 68 to 86 F with an absolute humidity of 50-75 grains per cubic ft. of dry air. The HVAC shall reject heat to the provided chilled water which is supplied at a temperature of 42 to 55 F at a pressure of 10 to 20 psi. For reheat, building hot water may be used. This is supplied at 125 to 170 F and has a hardness of 45 grains with PH over 9.2. Target control parameters are as follows: Temperature Monitor Resolution = 0.01 ?C Accuracy = ?0.2 ?C (with k = 2 at a 95% confidence interval) Dew point Monitor Resolution = 0.01 ?C Accuracy = 0.25 ?C (with k = 2 at a 95% confidence interval) Recovery response time to a temperature or dewpoint excursion of 5 ?C shall be a maximum of 2 minutes. Heat load in the room will consist of 4 technicians and 2 computers plus environmental monitors and controllers. The people will be moving in and out the filter room for any duration of time over a 24 hour period. Contractor Supplied Environmental Control System - The filter room environmental control system, FRCS, shall be selected by the contractor but must meet EPA performance criteria listed in sections 2.3.2.1 through 2.3.2.3. If a computer system is selected by the contractor, the system must meet EPA's interfacing requirements with the existing Filter Room Monitoring System (FRMS). 2.4 Environmental Control Room and Balance Temperature The environment shall be maintained at 22 ?C ? 1 ?C. Temperature shall be sampled 1 per second and an unweighted 5 minute moving average of this data shall be graphically recorded. The monitoring and control device shall be NIST traceable and accurate to at least ?0.2 ?C (k=2, 95% confidence). Room Balance Dew point The environment shall be maintained at a dew point of 9.5 ?C ? 1 ?C. The dew point shall be sampled 1 per second and an unweighted 5 minute moving average of this data shall be graphically recorded. The monitoring and control device shall be NIST traceable and accurate to at least ?0.25 ?C (k=2, 95% confidence). A Barometer with serial data output will be provided by EPA for incorporation into the environmental control. Compatibility with existing Filter Room Monitoring System (FRMS). The Filter Room Control System (FRCS) shall monitor at a frequency that will enable it to control temperatures and humidity per the performance criteria listed in sections 2.3.2.1 through 2.3.2.3. The following interface requirements must be met by the FRCS. The EPA Filter Room Monitor System (FRMS) computer will perform any required data averaging for purposes of reporting. An RS232 output of environmental parameters from the FRCS shall be available for the EPA's FRMS at a minimum data rate frequency of 2 Hertz. The existing software receives Dry Bulb, Dew Point and Humidity at 2 Hz through one serial port and Pressure through a second serial port. Use of the RS232 port or Analog signals by the EPA filter room monitor computer shall have no adverse effects on the Control System. 2.5 Fire Suppression ? Existing system to be used. No modification required. 2.6 Software - The vender shall specify and provide software for the FRCS if required. Software, if required by the FRCS, shall be developed using commercially available programs such as Labview or Visual Basic. A copy of all code developed for this project shall provided by the contractor. Supplied software should allow Visual Basic or an Oracle database to query for most recent 5 min. average values for the parameters listed in section 2.3.2. 2.7 - Interface Requirements for the FRMS Hardware requirements for data supplied to the FRMS. For an optional analog interface: The dewpoint and temperature monitors shall be equipped with three 4 to 20 mA current outputs. These 2-wire channels must be powered with 12 to 28 VDC external power supplies (not provided). The analog outputs are galvanically isolated from electronics but they are not isolated from each other. A separate (isolated) power supply is required for each analog channel. Analog output signals for access to ambient temperatures and humidity shall be optically isolated so that FCMS access shall not have any adverse impacts on the FRCS. For the required serial interface: The dewpoint and temperature monitors shall provide serial data at the required frequency using a serial cable. Data values shall be delimited or labeled in the communication stream so that values may be parsed from the communication string by FCMS computer software. 2.8 - Acceptance Test Requirements Data logged by the EPA supplied FRMS shall be evaluated for a period of one week to verify FRCS functionality per the performance criteria listed in sections 2.3.2.1 through 2.3.2.3 and section 2.4. THE EPA HAS SET THIS ACQUISITION ASIDE FOR SMALL BUSINESS. The North American Industry Classification Code is 333415 with a small business size standard of 750 employees. A written solicitation, PR-CI-04-10739, is anticipated to be issued on Wednesday 5/26/04. It is anticipated the solicitation will be issued as a request for proposals (RFP). All responsible small business sources may submit a quotation in response to the solicitation which shall be considered by the Agency. This procurement will be pursued using FAR Part 12 Commercial Acquisition methods and procedures. This notice of intent is not a request for competitive quotations. A site visit opportunity will be announced in the solicitation it will take place on a date to be determined at the installation site: US EPA, National Fuel and Vehicle Emission Laboratory, 2565 Plymouth Road, Ann Arbor, Michigan 48105. The Agency intends for this event to constitute the sole site visit opportunity for prospective offerors. The Agency is under no obligation to make accommodations for those unable to attend the site visit event as scheduled. Additional specifications, descriptions of the area and general layout, will be made available along with the solicitation. The Government will award a contract resulting from this solicitation to the responsible offeror whose offer conforming to the solicitation will be most advantageous to the Government, price and other factors considered. An offer must include the minimum requirements of the Performance Work Statement (PWS). In addition to price, the following factors will be used to evaluate the offeror's technical proposal: responsiveness to the PWS, previous technical experience, managerial ability, schedule and delivery. These factors shall be evaluated on a Best Value basis. Contract type will be firm fixed price.