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Calgon Carbon’s Ultraviolet Technologies Division Receives Conditional Acceptance From California Department Of Public Health For C3500 UV Disinfection System

Calgon Carbon Corporation’s (NYSE: CCC) Ultraviolet (UV) Technologies Division announced that it received conditional acceptance of its C 3500 (now the C 3500D), a wastewater disinfection system that utilizes ultraviolet light, from the California Department of Public Health (CDPH). The conditional acceptance permits the sale of Calgon Carbon's UV equipment into states where the majority of water reuse activity is expected to occur.

The CDPH Drinking Water Program’s Water Recycling Committee (WRC) found that the Calgon Carbon C 3500D UV disinfection system meets the coliform and virus disinfection criteria found in Title 22 of the California Code of Regulations (CCR) for recycled waters that have received treatment through a tertiary filtration process accepted by CDPH.

The C 3500D utilizes calibrated germicidal UV sensors to monitor the performance of the system and control the power output to the UV lamps. These sensors ensure the required dose is continuously applied while reducing the operation and maintenance costs of the C 3500D. Calgon Carbon is only one of two manufacturers of open-channel UV systems that utilize this cost savings approach.

The WRC reviewed the “Calgon Carbon C 3500D Wastewater UV Reactor Validation Report” (Carollo Engineers, January 2010), which contains the bioassay results of testing in Stockton, California. The results were analyzed in accordance with the 2003 Ultraviolet Disinfection Guidelines for Drinking Water and Water Reuse published by the National Water Research Institute/AWWA Research Foundation (NWRI).

Recycled waters meeting these stringent microbiological standards can be used for the irrigation of crops and golf courses, recreational waters, and other non-potable applications. Disinfection with UV light is an important part of the treatment process.

Water scarcity and demand are driving growth of the water reuse market. This conditional acceptance opens the California market to the C 3500 and also to states that look to the CDPH regarding technology approvals, including Washington, Oregon, Arizona, Nevada, Florida, and Hawaii.

In commenting, James A. Sullivan, Calgon Carbon's vice president, Americas said, “Gaining the California Department of Public Health’s conditional acceptance expands the market for the C 3500D and exemplifies Calgon Carbon’s commitment to quality and customer satisfaction in the design, manufacture, and distribution of UV water and wastewater treatment systems.”

Calgon Carbon’s UV Technologies Division is known for its leading edge application of UV disinfection and UV oxidation technologies for drinking water, wastewater, groundwater, and water reuse. The company developed an economical process using UV to inactivate Cryptosporidium and similar pathogens in surface water, rendering them harmless to humans. The Division also introduced one of the first advanced UV oxidation processes to remediate contaminated groundwater and it currently has over 300 UV oxidation installations worldwide.

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