San Antonio Water System Ionwave #26-26121 Addendum 2

Cleaning and documentation of a lime-obstructed 54-inch pipeline

San Antonio Water System is seeking a contractor to clean and document a lime-obstructed pipeline at Agua Vista Station. - Government buyer: San Antonio Water System (SAWS), Purchasing Department. - Requested services: Clean and drain a 54-inch steel pipeline; remove and dispose of lime solids and scale estimated at 30 cubic yards or 35 tons, whichever is greater; rinse and disinfect cleaned areas to AWWA standards; prevent waste runoff; and provide before-and-after CCTV video and photographs. - The vertical pipe sections reportedly have 4–5 inches of lime buildup. The site drawings also show a 42-inch riser and a blind flange about 3 feet below grade. - SAWS will remove and reinstall pipeline access components. The contractor supplies labor, equipment, materials, supervision, disposal, mobilization, and demobilization. - Safety and performance requirements: Complete on-site work during a seven-calendar-day shutdown, with work potentially continuing 24 hours per day. Bidders must have at least five years of relevant experience. The contractor must provide a project-specific, OSHA-compliant safety and health plan for SAWS review before construction; confined-space protections apply if entry is required. Submittals are due within two weeks after notice to proceed. - Named company: Lhoist North America is identified as the source of the High Calcium Quicklime safety data sheet for the material being removed; it is not specified as a bidder or required supplier. - Products and OEMs: No products or product part numbers are requested. No required cleaning-equipment brand or OEM is identified.

Description

San Antonio Water System is seeking bids for cleaning and removing accumulated lime slurry solids from an existing 54-inch steel pipeline at Agua Vista Station in San Antonio, Texas. The work includes labor, equipment, disposal, video and photographic documentation, quality control, and related services, and must be completed during the scheduled seven-day shutdown from December 6–12, 2026. SAWS will remove the upstream flowmeter and downstream blind flange to provide access and reinstall them after the work. Addendum 2 provides responses to bidder questions and adds a quicklime safety data sheet and pre-bid meeting materials.

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