Calgon Carbon Corporation disclosed on Wednesday, March 29th, that it signed a system supply contract with California Water Service valued at US$13.2 million. Under the terms of the contract, the largest carbon adsorption equipment project for drinking water in Calgon Carbon’s history, the company will contribute granular activated carbon (GAC) as well as related equipment systems to treat more than 30 wells of drinking water tainted with 1,2,3-Trichloropropane (1,2,3-TCP).
Calgon Carbon will provide 104 GAC adsorption vessels along with more than 2 million pounds (907,000kg) of Filtrasorb® 400 GAC to treat an excess of 40 million gallons (151.4 million litres) of water a day at 38 well sites managed by California Water. The GAC adsorption instruments will be set up in a number of stages, all the equipment is set to be in service by June 2018.
Through a process named adsorption, GAC eliminates 1,2,3-TCP from the drinking water. In the TCP regulation, the California Division of Drinking Water is anticipating the GAC to be named the best available technology (BAT).
Before the 1990s, 1,2,3-TCP was frequently utilised in California in soil fumigants. A colourless, manmade, chlorinated hydrocarbon, it is known to be the root of cancer in laboratory animals. California later added 1,2,3-TCP to the record of chemicals known to cause cancer in 1992, in accordance with the state’s Safe Drinking Water and Toxic Enforcement Act. Presently, the chemical compound is not controlled by the United States Environmental Protection Agency (US EPA).
“Calgon Carbon has provided hundreds of GAC adsorption systems over the last thirty years to numerous water providers, and we are [honoured] to have been selected by [California Water Service] to be its granular activated carbon and equipment supplier for this important project,” Nora Stockhausen, Vice President of the Municipal and Reactivation Business Unit, said.
“With 1,2,3-TCP detected in many drinking water sources in California, Calgon Carbon is excited to be part of a solution that will provide so many public water systems with TCP-free drinking water,” Executive Vice President of the Core Carbon and Services Division, James Coccagno, said.
“While the standard for TCP has not been [finalised] in California, we intend to be fully prepared to meet any MCL (maximum containment levels) ultimately set, because protecting our customers’ health and safety is our highest priority,” California Water Service President and CEO, Martin A. Kropelnicki, said. “We are pleased to be partnering with Calgon Carbon, a leader in carbon treatment technologies, which will be instrumental in helping us comply with the new standard as quickly as possible.”