Fort Walton Beach Council agenda — 04-29-03 workshop agenda — reading text

WORKSHOP MEETING AGENDA CITY COUNCIL, CITY OF FORT WALTON BEACH TUESDAY, APRIL 29, 2003... 5: 30 P.M. CALL TO ORDER 1. Presentation on the Wastewater Treatment Plant Facilities Plan. Public Works Director) ( CD 2002/01). ADJOURN Any person who decides to appeal any decision made with respect to any matter considered at this meeting will need a record of the proceedings, and for such purpose is made, which record may need to ensure that a verbatim record of the proceedings includes the testimony and evidence upon which the appeal is to be based. ( FS286. 0105). The City of Fort Walton Beach adheres to the Americans with Disabilities Act and will make reasonable modifications for access to this meeting upon request. Please call the City Oerk, Helen Spencer, at 850-833- 9509, to make a request. For Hearing Impaired call the 800- 955-8771 ( 1- or 1- 800- 955-8770 ( Voice). City Hall TDD #833-9925, or fDD),  CITY OF FORT WALTON BEACH MEMORANDUM To: Reid Silverboard, City Manager From: John Hofstad, Assistant Public Works Director Through: Thomas Murray, Public Works Director Date: April is, 2003 Subject: Wastewater Treatment Plant Facilities Plan Background: The City of Fort Walton Beach owns and operates a 4.5 million gallon per day (MGD) wastewater small ourlying treatment plant (WWTP) for processing sewage generated within the City and a few areas. The facility opened in 1980 and was upgraded in 1992 with the addition of a tertiary filtration Beach Golf Club. Other minor system for providing irrigation water to the Fort Walton made at that time for high- level disinfection and ponding control on the improvements were facility' s effluent sprayfield. Several treatment technologies exist for sanitary sewage. The City' s current facility utilizes Rotating Biological Contactors (RBCs) as its secondary treatment method for processing influent sewage. Over the past several years, we have experienced significant problems with the RBC units, concrete structures, mechanical equipment, and metal structures. An of these features are critical to the For this reason, Staff recommended the proper operation of a wastewater treatment facility. development of a WWTP Facilities Plan to evaluate our existing system and identify future improvements. The Facilities Plan is a comprehensive document required by the Florida Department of Environmental Protection (FDEP) and the State Revolving Fund program for permitting and infrastructure improvements. Staff developed a Request for Proposal (RFP) for funding utility of selecting an engineering :firm to prepare a WWTP Facilities Plan early last year. Upon completion this process, Staff recommended awarding the Facilities Plan Study to Hartman & Associates and awarded the Incorporated (HAl)of Destin. Council concurred with this recommendation 28, 2002. project to HAlon May Discussion: Since 1996, the City has invested nearly $ 1, 000, 000 in its treatment facility through a series of capital improvement programs. This investment was required in order to maintain operations and environmental compliance with the FDEP. If major renovations are not undertaken in the next few  Assessment of the capabilities of the existing WWTP' s secondary treatment Alternative methods of upgrading the existing WWTP' s secondary treatment Regulatory and other permitting requirements Operation and Maintenance ( O& M)and Capital costs for the various operating and process scenarios presented as alternative methods Required renovations to anci1lary equipment and processes Present worth analysis over the life of the proposed alternatives Economic impacts on wastewater service area customers HAl initially evaluated three treatment options for this planning effort against a set of scoring criteria. One of the options,WesTech STM-Aerotor, did not score well in all areas and was excluded from the final analysis. The two remaining options, Rehab Existing RBC facility and Construct New Oxidation Ditch facility, are presented in the final Facilities Plan report as the most desirable alternatives for the City. For the purpose of this discussion, Staff also considered the possibilityof developing a regional facility with Okaloosa County to service both jurisdictions. This, however, was not within the scope of services required of HAL Rehabilitate Existing RBCs - The existing RBC facility will require extensive renovation to meet today' s more stringent operating standards. HAl estimates this cost to be 2, 650, 000, another $1, 468, 750 in renovations to ancillary equipment for a total of plus 4,118,750. The 30- year present worth for this alternative is estimated at $ 7, 094,366 and includes the reinvestment of capital dollars at the end of the equipment' s useful life in the fifteenth and twentieth years. All of the quoted costs include associated fees for engineering, permitting, and contingency. The attractiveness of this option is its low upfront capital cost. are the reinvestment of capital dollars in years fifteen and Conversely, the negatives high in the future. RBC, or twenty and the probability of more stringent effluent regulations fixed- film, type facilities typically are not designed to achieve nutrient removal. Should the Environmental Protection Agency pass more stringent effluent regulations for nutrients in the future, this type of facility will require additional renovations. Constroct New Oxidation Ditch Facility - HAl estimates the cost to dismantle the RBC another $ 531, 250 facility and construct a new Oxidation Ditch facility to be $4,262, 500, plus in renovations to ancillary equipment for a total of $4,793,750. The 30- year present worth for this alternative is estimated at $6, 798, 997 and includes the reinvestment of capital dollars at the end of the equipment's useful life in the fifteenth and twentieth years. All of the The quoted costs include associated fees for engineering, permitting, and contingency. Oxidation Ditch option provides a better long- term benefit to the City as less capital dollars This is explained are required for reinvestment in out years as compared to the RBC facility. than RBC facilities and, by the fact that Oxidation Ditches have less mechanical equipment therefore, future replacement costs are less. In addition, Oxidation Ditches of the type recommended by this study are designed to achieve sufficient nutrient removal in the event this type regulations become more stringent in the future. The obvious negative pursuing to of facility over renovating the existing facility is the increase in up front capital dollars, which is $ 675, 000 higher than for rehabilitating the existing RBCs. is Develop Regional Facility with Okaloosa County - Okaloosa County planning to build a new 9. 6 MGD facility to replace their aging 6. 5 MGD Gamier' s Treatment Plant. to site this facility on the Eglin' s Encroachment Committee has given conceptual approval 2  This proposed location County's leased sprayfield located at the end of Roberts Boulevard. is immediately east of the City' s current plant location on Percy L.Coleman Road. of Combining flows with the County at this location would require little in the way City infrastructure improvements. Staff has expressed an interest in exploring the feasibility of are currendy combining with the County on a plant to service both needs. County personnel staff the City with proportionate share costs for working with their consulting to provide Aside from capital building a facility to accommodate this added flow requirement. the is share proportionate amount of all associated construction costs, City. expected to a costs for the Environmental Assessment, Environmental Baseline Survey, and Unexploded This information was unavailable at the time this report was prepared Ord#nance Survey. but will be provided as an attachment prior to the Council meeting date. The City' s consulting engineers, HAl, are recommending in the Facilities Plan that the City proceed with designing and pennitting an Oxidation Ditch facility to replace the existing RBC facility. this the in the best position to handle its future needs, providing the City Certainly, option places flexibility for addressing future regulatory concerns as well as capital reinvestment concerns. most Detailed infonnation regarding a combined facility with Okaloosa County will be provided at a later date, along with the completed WWfP Facilities Plan. Once direction is provided by Council, Staffs intent is to fund the project with a State Revolving Fund loan through the Florida Department of Environmental Protection. Conclusion: Staff requests City Council acceptance of the WWfP Facilities Plan as drafted by Hartman &