On July 13, 2017, the U.S. Environmental Protection Agency announced an agreement with Matheson Tri-Gas to close three cesspools at its Kapolei facility on Oahu.
In May 2016, EPA inspected the Matheson Tri-Gas facility, a commercial gas supply company in the Campbell Industrial Park, and found two large-capacity cesspools (LCCs) in use. EPA regulations under the Safe Drinking Water Act required closure of all existing LCCs by April 5, 2005.
Matheson, which acquired the facility in 2015, will close the two LCCs and convert to a septic system. The company will pay a civil penalty of $88,374 for violations of the Safe Drinking Water Act and spend $50,000 on a supplemental environmental project to close an on-site small-capacity cesspool. Matheson expects to complete the closure of all three cesspools and convert to a septic system by the end of 2017.
“Matheson has agreed to not only close and replace its LCCs with approved systems, but will also close an additional small-capacity cesspool at its facility,” said Alexis Strauss, EPA’s Acting Regional Administrator for the Pacific Southwest. “EPA will continue to focus on closing illegal cesspools to protect Hawaii’s drinking water and coastal water resources.”
Cesspools collect and discharge untreated raw sewage into the ground, where disease-causing pathogens and harmful chemicals can contaminate groundwater, streams and the ocean. Groundwater provides 99 percent of all domestic water in Hawaii, where cesspools are used more widely than in any other state. Since EPA banned LCCs in 2005, over 3,000 large-capacity cesspools have been closed state-wide, many through voluntary compliance. The ban does not apply to individual cesspools connected to single-family homes.
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