Pluris Wedgefield Update on 90 Day Pilot Study for Treatment of Total Trihalomethanes (“TTHMs”)

April 2017

Pluris Wedgefield (“Pluris”) has passed the halfway mark in the Florida Department of Environmental Protection (“FDEP”) approved 90 day pilot study that addresses TTHMs, the byproduct of chlorine disinfection in drinking water.

Pilot study results from using chlorine dioxide as the potential replacement disinfectant instead of the currently used chlorine for the future are positive. Preliminary independent analytical laboratory results from the pilot study show concentrations of TTHMs ranging between 6 micrograms per liter (µ/l) to 41 µ/l. The Federal Environmental Protection Agency (“EPA”) current regulatory limit is 80 µ/l.

The subsequent results are contemplated to improve further. The reason is due to the pilot study protocol which calls for gradual reduction in chlorine levels as chlorine dioxide levels are increased.  This is an incremental process that requires weeks in balancing the relative values. As the chlorine levels decrease there is less potential for TTHM formation in the distribution system.  Chlorine levels are contemplated to reach “0” in the latter part of April.

Pluris has been contacted by a number of customers noting improvement in odor, taste and color in the drinking water. This is likely the result of the decrease in chlorine concentration. The aesthetics of odor, taste and color would change as any smell of chlorine would disappear, along with the color and taste associated with chlorine.

Pluris contemplates the end of the 90 day pilot study on May 30, 2017. The FDEP is considering extending the pilot study beyond the original 90 day period it approved. The FDEP’s rationale for the extension is to consider any effect of hotter summer weather. All utilities experience the highest TTHM level results during warmer seasons of the year.

Pluris will notify customers of any extension the FDEP requests. In the meantime customers with questions or desiring to visit the water treatment plant facility are encouraged to contact Mr. Joe Kuhns. He will personally schedule a facility visit for any customer wanting to observe the chlorine dioxide pilot study treatment plant, as well as the entire water treatment facility.

Mr. Kuhns can be reached via email at jkuhns@plurisusa.com or by telephone at (813) 526-0608.