Nick Dobrez | October 27, 2018
In 2012, a contractor was tasked with cleaning up the stormwater canals lining the runways at Tampa International Airport. These canals had filled with vegetation and were no longer properly cleaning the stormwater runoff that flows into the Tampa Bay. The turbidity of the initial water effluent was 617 – far above the required 31.43 NTU set by state regulations. The project consisted of three large sections that need to be treated while guaranteeing against any harm to the aquatic and plant life in the Tampa Bay.
HaloKlear DPS was recommended to treat the water and obtain the required NTU discharge. HaloKlear dose optimization testing found that LBP-2101 and LiquiFloc 1% would reduce turbidities well below SWPPP discharge limits in both fresh and salt water. Treatment operations consist of a passive treatment area within a 72” culvert pipe and a semi-passive treatment area through a 6’ manifold discharging into a sediment bag. Both applications are utilizing the HaloKlear segmented socks.
Passive treatment operations treat a low flow 50 GPM average on dry days. Rain events can cause upwards of 150 GPM. Turbidity at the discharge point ranges from 3 to 12 NTU. Semi-passive treatment operations treat an average flow of 250 GPM. NTU at the influent averages in the 600’s with rain events and down to 180 NTUs during dry conditions. NTU readings off the sediment bag average between 1.70 and 5 NTUs. Final discharge flows into a wetland. HaloKlear is providing collected data to the EPA to help set national standards/guidelines for construction stormwater treatment. The success of this project will affect how effluent water will be treated on surrounding projects in the Tampa area with eco-friendly solutions being of high importance.