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ORDINANCE NO. O-1213-34 UPON SECOND AND FINAL READING: AN ORDINANCE OF THE COUNCIL OF THE CITY OF NORMAN, OKLAHOMA, ADDING ARTICLE VIII, MANUFACTURED FERTILIZER, SECTIONS 10-801 THROUGH 10-813 TO THE CODE OF THE CITY OF NORMAN TO DEFINE MANUFACTURED FERTILIZER CONTAINING PHOSPHORUS, REGULATE ITS USE IN ACCORDANCE WITH SPECIFIC PROVISIONS, TO PROVIDE FOR REGISTRATION OF COMMERCIAL APPLICATORS OF MANUFACTURED FERTILIZER, AND PROVIDE FOR PENALTY FOR FAILURE TO COMPLY WITH THE TERMS OF THIS CHAPTER; AND ADDING SECTION 13-108 TO PROVIDE FEES FOR COMMERCIAL APPLICATORS; AND PROVIDING FOR THE SEVERABILITY THEREOF.
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BACKGROUND: Lake Thunderbird, the City of Norman’s primary source of drinking water, has been identified as having chlorophyll-a concentrations over 3 times the allowable limit set by the Oklahoma Department of Environmental Quality and the U.S. Environmental Protection Agency. Chlorophyll-a is an indicator of the amount of algae in a water body. The high levels indicate that Lake Thunderbird is at risk of potentially dangerous algae levels that could render the water body unusable as a drinking water source. The algae growth is limited by the amount of nutrients provided in the water system. In this case, phosphorus has been identified as the limiting nutrient and by reducing the available phosphorus in Lake Thunderbird the amount of algae in the lake will decrease. Phosphorus levels in Lake Thunderbird have been well documented and were a topic addressed in the Storm Water Master Plan (SWMP) completed in November 2009 and adopted by the City Council in June 2011.
The SWMP suggests structural and non-structural best management practices (BMPs) to control nutrients including phosphorus. Structural controls are those controls that require engineering solutions that include detention basins, sediment basins, retention basins, constructed wetlands, and bio retention filter basins. Non-structural controls include stream planning corridors ...
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