Commander (FCP), USCG MLC (Pacific), Finance Division, Coast Guard Island, Alameda, CA 94501-5100

58 -- PURCHASE OF TWO (2) EACH OMNI-DIRECTIONAL SPIRAL HF ANTENNAS SOL DTCG89-98-R-612301 DUE 041698 POC Gary S. Brazzi, Contract Specialist (510) 437-3057 This synopsis is issued to Amend the Notice published on Monday, 9 March 1998: The following changes apply to Solicitation DTCG89-98-R-612301. Dimensions: changed from: less than three-hundred fifty (350) feet across. to: less than three-hundred seventy (370) feet across. Building Materials are clarified as follows: Galvanized hardware is to be used in conjunction with all galvanized steel structures. Stainless steel is to be used in conjunction with electrical parts of the antenna. ANSI G90 specifications cover the galvanization of structures (coating), ASTM A-153 and ASTM A-123 specifications have been determined to comply with solicitation requirements. Information regarding seismic zone four (4) requirements can be found in the Uniform Building Code for Engineering. The two (2) sets of pre-engineering drawings for footings and construction dimensions and criteria will be submitted no later than 30 days after contract award. If the offeror proposes a commercial off the shelf item, that has historically been proven in both operational and mechanical design and function, the offeror may provide a certification of compliance upon delivery of the antennas to the transshipment point. Proposals are to be submitted with an original and one (1) copy. Offeror's are required to provide written acknowledgment of this amendment with their proposal. As a result of these changes/additions to the Notice previously published, the date and time of receipt of proposals is changed to Thursday, 16 April 1998, 2:00 P.M. local time.***** (0089)

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