The San Clemente Beach Trail, 3500 feet of raised steel bridge that was starting to show signs of rust and severe corrosion. Crushed glass 20/40 was used with a DB machine and flash rust preventer as the preparation of the corroded surface. Hold Blast were added to the sandblasting water to prevent flash rusting.The crushed glass 20/40 and the flash rust preventers are both environmentally inert and have been used on previous over the water projects in San Clemente, San Francisco, and many other coastal cities. Over water projects have been reviewed by the California Coastal Commission, EPA and City building departments. Using a dustless blasting system eliminated 95% of the dust.