Centers for Disease Control and Prevention (CDC), Procurement & Grants Office, Contracts & Purchases Branch, 255 East Paces Ferry Rd, N.E, Rm 419, Atlanta, GA 30305

54 -- ENVIRONMENTAL/SMOKING CHAMBER SOL 97-115(Q) DUE 071597 POC Grace White, Contract Specialist at (404)842-6553 This action, originally published in the CBD June 2, 1997, and previously amended once to extend the due date for quotations from 2:00 PM June 24, 1997 to 2:00 PM July 15, 1997, is amended a second time to incorporate the following additional questions and answers: (1) What materials are required for the wall panels? The materials should be hard-surfaced (such as plastic or rust-proof metal). The composition should not matter, as long as the stated temperature and humidity levels and tolerances can be met. The insulation should be sandwiched between the hard surfaces. (2) What is the required work light intensity (with 70 foot-candles considered as standard)? Standard work-light intensity is adequate. (3) Is a compressor/condenser required? Water-cooled or air-cooled? Located where? A compressor/condenser is required to meet the specifications. The machinery should be air-cooled. The compressor/condenser will be located in a conditioned-air room and next to the environmental chamber. (4) If relative humidity is requested, what type of additive moisture should be used -- steam or water mist -- and what type of water will be supplied? Deionized water at room temperature will be supplied for additive moisture. The vendor's equipment must provide the means for steaming or misting to meet the required specifications. It should be noted that steam-production will require additional energy. (5) If dehumidification is required, what method of control is required -- refrigeration or desiccant dryer? Refrigeration will be necessary for dehumidification. It would be too costly to periodically replace desiccant. (6) Is any shelving or casework required? No (7) What warranty period is requested? One-year warranty is required with optional additional warranty period after service training. (8) What is the desired delivery time? Forty-two days (6 weeks) from award. (0167)

Loren Data Corp. http://www.ld.com (SYN# 0266 19970618\54-0002.SOL)