City of Norman, OK - File #: K-1516-79 AMD #1

• File #: K-1516-79 AMD #1
• Version: 1
• Name: Amendment to Contract with OWRB for TMDL Services
• Type: Contract
• Status: Passed
• File created: 1/12/2017
• In control: City Council
• On agenda: 2/14/2017
• Final action: 2/14/2017
• Title: AMENDMENT NO. ONE TO CONTRACT K-1516-79: BY AND BETWEEN THE CITY OF NORMAN, OKLAHOMA, AND THE OKLAHOMA WATER RESOURCES BOARD TO PROVIDE ADDITIONAL EQUIPMENT TO THE MONITORING SITES AS PART OF THE MONITORING SERVICES REQUIRED BY THE LAKE THUNDERBIRD TOTAL MAXIMUM DAILY LOAD (TMDL) MONITORING PLAN.

Date	Ver.	Action By	Action	Result
2/14/2017	1	City Council

Title
AMENDMENT NO. ONE TO CONTRACT K-1516-79: BY AND BETWEEN THE CITY OF NORMAN, OKLAHOMA, AND THE OKLAHOMA WATER RESOURCES BOARD TO PROVIDE ADDITIONAL EQUIPMENT TO THE MONITORING SITES AS PART OF THE MONITORING SERVICES REQUIRED BY THE LAKE THUNDERBIRD TOTAL MAXIMUM DAILY LOAD (TMDL) MONITORING PLAN.

Body
BACKGROUND: The Oklahoma Department of Environmental Quality (ODEQ) issued the Total Maximum Daily Load Report (TMDL) for Lake Thunderbird (Lake) and its watershed on November 13, 2013. The goal of the establishment of this TMDL is for the water in Lake Thunderbird to meet state and federal Water Quality Standards (WQS). The report identifies two beneficial uses that the Lake does not meet (referred to as nonattainment): Warm Water Aquatic Community; and Public and Private Water Supply. This nonattainment is due to impairment in three categories of measurement: turbidity, dissolved oxygen and chlorophyll-a.

Certain pollutants in the water have a detrimental effect on these parameters for the Lake. The City is required to reduce the amounts of these pollutants discharged within its Municipal Separate Storm Sewer System (MS4). The pollutants of concern for monitoring purposes are Total Nitrogen (TN), Total Phosphorus (TP), and Total Suspended Solids (TSS). Modelling of the Lake and its watershed was done by ODEQ to determine the Waste Load Allocations (WLAs) for the three cities in the watershed, Norman, Moore and Oklahoma City.

The City of Norman has a vested interest in a successful program as Lake Thunderbird serves as Norman's primary drinking water source. The cities of Moore and Oklahoma City must also comply with the TMDL; however, neither of these cities use Lake Thunderbird as a source for their drinking water.

Lake Thunderbird TMDL Compliance and Monitoring Plans (Plans) were developed by staff and endorsed by the City Council on October 27, 2015, through Resolution R-1516-25. The Plans were submitted to the ODEQ for review and approv...