Surface Water Treatment Plant (SWTP) Ground Storage Tanks Rehabilitation
City of Kilgore Engineering Department
Cherokee Painting & Sandblasting, Inc. (Jacksonville, TX)
The Project is located on Farm to Market 349 (FM 349) in Gregg County 1000 ft. east of the intersection of US 259 Business and FM 349.
Change Order No. 1 added seven days for investigation of roof rafters.
The Work under this contract consists of the rehabilitation of two 1,000,000 gallon (32’H x 75’Ø) welded steel ground storage tanks. The rehabilitation consists of taking the tanks out of service, draining the water, and removing all debris from the interior. All interior and exterior paint shall be removed by blasting and disposed of according to applicable law. The interior and exterior surfaces shall be painted with a 3 coat epoxy paint system. Select existing appurtenances shall be removed and replaced with new units including, but not limited to roof vents, access hatches, and interior ladders. The tanks shall be disinfected and placed back in service upon successful completion of laboratory testing. Each tank is to be completed individually with only one tank out of service at any time.
The Texas Commission on Environmental Quality issued a notice of violation during the 2013 compliance investigation for the paint and appurtenances not meeting current standards and in general disrepair. All of the City's tanks are inspected on an annual basis. One tank was built in 1974 and the other tank was built in 1994. These are the last of the tanks to be rehabilitated in the last 7 years. All of our tanks will be brought up to the most recent AWWA code.
As of June 22, 2016
Painting and repairs to the North tank has been completed. The tank is being disinfected and is expected to be placed back in service the week of June 27, 2016.
As of April 22, 2016
Surface preparation and priming of North tank is nearing completion. During blasting, we discovered that the roof rafters had experienced severe corrosion bringing into question their ability to support the roof in the future. An independent third party engineer (Dunham Engineering) was hired to make recommendations for repairs. The repairs recommended were to weld the rafters to the center support column and install 2 additional vents to aid in air circulation which will slow future corrosion. Additionally, the rafters will be caulked against the roof to prevent future moisture buildup. These changes were incorporated into Change Order No. 1. Steel plates in the center of the roof were also replaced. Filling and repairs of pits and holes by welding are also nearing completion.