Hydro-Optic Disinfection™ TechnologyHighly effective water disinfection ● Unmatched reliability ● Cost-effectiveness

Environmentally-friendly

Hydro-Optic Disinfection™ TechnologyHighly effective water disinfection ● Unmatched reliability ● Cost-effectiveness

Environmentally-friendly

WATER FOR MINING AND CSGBrisbane, May 2011

3

HOD-UVRZ series HOD system cross-sectionHOD-UVRZ series HOD system cross-section

Stainless

Quartz Tube

Air Space

Drinking Water ApplicationDrinking Water Application

Dewatering Process

Water

Sedimentation Water Treatment (RO/Filtration/UF)

Drinking Water To Camp

Bore Holes Dewatering and InjectionBore Holes Dewatering and Injection

Pre Treatment

First aquifer

'

water level

Water level

Second Aquifer First aquifer

Dewatering Bore HolesInjection Bore Holes

According to the EPA, the following environmental factors are critical:• Groundwater – changes to groundwater levels• Possible effects on groundwater-dependent ecosystems

UV disinfection is required to avoid possible contamination transfer between aquifers