The U.S. Coast Guard requires a contractor to replace a 6-inch backflow preventer at Building 21 on Base Los Angeles Long Beach in San Pedro, CA. The work includes removing the existing unit, installing a new Wilkins 475 ASTR assembly and two OSY valves, and testing the system. Performance must comply with OSHA, Cal/OSHA, and EM 385-1-1 safety standards, with work hours Monday through Friday, 7:00 AM to 3:00 PM, excluding federal holidays. A one-year warranty on all materials, equipment, and workmanship is required, and past performance and technical capability are considered more important than price. No budget amount or submission timeline is specified.