TO: Honorable Mayor & Members of the North Port Commission
FROM: Jonathan R. Lewis, ICMA-CM, City Manager
TITLE: Approve Agreement No. 2016-21 Professional Engineering Services, permitting, construction documents and limited CEI services for Chemical Feed Improvements at Myakkahatchee Creek Water Treatment Plant, with Hazen and Sawyer, P.C. of Sarasota, Florida in the amount of $64,390, plus $5,000 contingency for a total amount of $69,390.
Recommended Action
Approve Agreement No. 2016-21, Professional Engineering Services, Permitting, Construction documents and limited CEI services for Chemical Feed Improvements at Myakkahatchee Creek Water Treatment Plant, with Hazen and Sawyer, P.C. of Sarasota, Florida in the amount of $64,390 plus $5,000 contingency for a total amount of $69,390.
Background Information
The City is currently experiencing the following challenges: 1) the anhydrous (i.e. gaseous) ammonia system is a maintenance challenge and safety concern; and, 2) maintaining appropriate chlorine and ammonia residuals in the distribution system is difficult. The City has examined various options for ammonia addition (e.g. anhydrous ammonia, aqua ammonia, and ammonium sulfate) and has determined ammonium sulfate to be the best option. Additionally, a system which will allow for flow-pacing of the ammonia addition will greatly improve the Utilities' ability to manage chlorine and ammonia residuals in the distribution system.
There are many benefits to changing to a flow-paced ammonium sulfate system. Safety is one benefit as ammonium sulfate has less safety concerns compared to anhydrous ammonia. A second anticipated benefit is improved ability to manage residuals in the distribution system, which will decrease the amount of operational flushing required. The City is currently under a Remedial Action Plan (RAP) with Southwest Florida Water Management District (SWFWMD) to reduce flushing. Utilities' staff anticipate that the proposed cha...
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