Title
Consider/Discuss/Act on a Resolution Authorizing the Interim City Manager to Execute a Contract and Any Supplemental Agreements for Engineering Services for Water System Evaluation for Nitrification Effects - Phase 1 Project
Summary
COUNCIL GOAL: Operational Excellence
Safe & Secure Community
MEETING DATE: September 1, 2015
DEPARTMENT: Development Services/Engineering
CONTACT: Paul Tucker, PE, Senior Utility Engineer
Gary Graham, PE, PTOE, CIP and Traffic Manager
RECOMMENDED CITY COUNCIL ACTION:
• Approval of the Resolution.
ITEM SUMMARY:
• This Resolution authorizes the Interim City Manager to execute a contract in the amount of $28,000, as well as all required supplemental agreements thereto, with Freese and Nichols, Inc. to provide professional engineering services for the Water System Evaluation for Nitrification Effects - Phase 1 Project, for a total aggregate contract amount, inclusive of any supplemental agreements, not to exceed $32,000.
BACKGROUND INFORMATION:
• The City of McKinney receives treated water from the North Texas Municipal Water District. The treated water is disinfected by a chloramination process that provides for a longer lasting chloramine residual. Nitrification is a process that can occur in water systems that use chloramine for their residual disinfectant.
• Nitrification is a microbial process that converts ammonia and similar nitrogen compounds into nitrite and nitrate. Nitrification can degrade a distribution system’s water quality and negatively affect regulatory compliance. One of the symptoms of nitrification is a decreased/low chloramine residual during the hot summer months. Nitrification increases the rate at which the chloramine residual decays. By measuring the nitrite and nitrate levels at various locations throughout the distribution system, we can determine the areas of the system to increase/improve our maintenance practices.
• The Water System Evaluation for Nitrification Effects - Phase 1 Project will consist of the development and implementation of a focused sampling plan for the City’s water distribution system.
• The Water System Evaluation for Nitrification Effects - Phase 2 Project will be brought before Council in the upcoming months after the sampling data and results have been evaluated. The Phase 2 project will develop Water Quality Enhancement Alternatives and a Nitrification Action Plan.
• Freese and Nichols, Inc. submitted a response to 15-59RFQ Water System Analysis. They were the only submittal based on the specialty of Nitrification studies. They were selected based on their availability to perform the project and their experience with similar projects in the DFW Metroplex.
FINANCIAL SUMMARY:
• The Resolution authorizes a professional services contract with Freese and Nichols, Inc. for an amount not to exceed $32,000.
• Funds are available in the Utility Operating Budget - Professional Services ($32,000 from 003-8101-503-8516).
• With approval of this item, $1,973 will remain in 003-8101-503-8516.
BOARD OR COMMISSION RECOMMENDATION:
• N/A