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This project consisted of removal and abatement of an existing lead-based
exterior coating on a 1.5 million gallon standpipe. Specifications required
an SSPC-SP6/NACE3 surface preparation prior to prime coat application. To
control emissions during blasting operations, a combination of vacuum
blasting and shrouded wet abrasive blasting were utilized. Blasting and
prime coat application occurred during the winter, so a low temperature-cure
polyamide epoxy was used for the prime and intermediate coats. Top coats
included Aliphatic Acrylic Polyurethane with a clear coat applied after
installation of City of Gonzales logos. Extensive pre-construction and
post-construction testing was utilized to ensure that adequate debris
collection and ground protection were used and that all Texas Commission on
Environmental Quality regulations were met.
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