Fort Walton Beach — Ordinance 708 — reading text

found within minutes from the "downtown" area. The City of Fort Walton Beach currently serves approximately 6,741 residen- tial customers and approximately 625 commerical customers. The sewer service charges for each user is calculated by taking the monthly metered water consump- ‘tion and applying the existing rate structure. The following table illustrates a breakdown of all initial year users specifying the expected wastewater contri- butions upon which the User Charge System is based. TABLE NO. 1 INITIAL AVG. INITIAL AVG. TYPE OF USER DAILY FLOW (MGD) | YEARLY FLOW (MG) Residential & Commerical 2.55 930.0 Industrial -0- -0- Total 2.55 930.0 EXISTING SYSTEM The existing sewer system consists of 26 pumping stations, approximate 40 miles of various size sewer lines and two waste treatment plants. A. Waste Treatment Plant No. 1: Approximately 90 percent of Fort Walton's population is served by Plant No. 1 which is located 400 feet south of Hollywood Boulevard on Robinwood Drive. This plant was originally constructed in 1955 and underwent some updating and revisions in 1965, It is a trickling filter type secondary treatment plant designed to treat an average flow of 1.7 million gallons per day. B. Waste Treatment Plant No. 2 This small 125,000 gallon per day extended aeration plant was constructed in 1965 to serve a residential area generally east and south of the Municipal Golf Course at Garnier. The plant is located on the same large tract of City owned land as the 18 hole golf course and its proposed 18 hole addition. DESCRIPTION OF THE PROJECT The current project consists of the construction of the following sewer- age facilities: 1, Anew 11.0 MED (Design) Main Pumping Station is located at the existing STP #1 site which will reroute all raw waste from the No. 1 Service Area to a new WWTP. Also included at the Main Pumping Station location will be provisions to accept, store and blend "septic tank pumpout" into the raw waste flow. This material will be treated with the mixed waste at the new treatment plant. Construction of a new 30" Force Main from the Main Pumping Station to the new WWIP. This work also includes a tie-in of raw waste flow from Service Area No. 2, so that this area's flow can be routed to the new WWIP. A new 4.5 MGD (ADF) secondary treatment plant, located in the northern section of the area and adjacent to lands owned by the federal govern- ment at Eglin Air Force Base. The treatment plant is a secondary system utilizing Rotating Biological Contactors as the means of providing carbonaceous removal. Primary and secondary settling is provided as well as degritting and chlorination of the final effluent. Sludge that is generated is thickened and anaerobically digested prior to dewatering by means of vacuum filtration. Laboratory facilities will also be provided. A Holding Pond is being constructed which will provide 9.2 days storage at the average design flow of 4.5 MGD. The pond is being constructed with an impervious bottom and sides, and bermed and fenced for protection. A pumping system (pump dock) will also be provided for the purpose of routing the treated waste to a Spray Irrigation Disposal Field. Construction of a new 20" Force Main from the pump dock to the Spray Irrigation Field. A 492 acre Spray Irrigation Field will be constructed on lands leased from Eglin Air Force Base. The system is designed so that areas can be operated independently of ome another and alternated. A groundwater monitoring system was included in the scope of the work. OPERATING EXPENSES Table No. 2 illustrates the annual cost of operating and maintaining the sewer system and both wastewater treatment plants for the 1978 Fiscal Year. The operation, maintenance, and replacement costs used to establish the base of this User Charge System were determined by an analysis of prior operating ‘costs of the City and engineering projections of those costs associated with the design criteria of the new treatment plant and pumping stations. The operation of the new treatment plant will require the hiring of additional employees, and will consume a greater amount of electricity. The addition of the pumping dock and spray irrigation system will also cause a considerable rise in power costs. Accordingly we estimate the operation, maintenance and replace- ment cost to be approximately $655,000 for the first full year of operation. TABLE NO. 2 ESTIMATED FIRST YEAR OPERATING EXPENSES PERSONNEL SERVICES: Salaries , $140,000.00 Vehicle Repair Salaries 6,400.00 FICA 12,000.00 Health Insurance ~. 9,400.00 Pension Plan 19,400.00 Unemployment Compensation 1,900.00 Workmen's Compensation 10,000.00 UTILITIES 240,000.00 VEHICLE & EQUIPMENT REPAIR 9,400.00 FUEL & OIL 7,000.00 PLANT & SYSTEM REPAIR -40,000.00 OPERATING SUPPLIES & EXPENSE 137,000.00 OFFICE SUPPLIES & POSTAGE : 4,500.00 TRAINING 1,500.00 AUDITING 4,000.00 INSURANCE 10,000.00 BULLDING MAINTENANCE 1,500.00 MISCELLANEOUS ; 1,000.00 TOTAL OPERATING EXPENSES $655,000.00 Pursuant to 40 CFR 35.929 (d) the costs of operation and maintenance of Infiltration/Inflow must be distributed among all users of the Grantee's treatment works system. Accordingly, they have been included in the above calculation. DEBT SERVICE REQUIREMENTS “Over the years the City has financed many improvements to its sewer system through the issuance of Sewer Revenue Certificates and General Obligation Bonds. Table No. 3 lists the consolidated debt service requirements to maturity of all existing issues, as well as the proposed 1979 Utility Tax Revenue issue. TABLE NO. 3 CITY OF FORT WALTON BEACH SEWER REVENUE GENERAL FISCAL YEAR CERTIFICATES | OBLIGATION UTILITIES TAX TOTAL ENDING EXISTING _ BONDS 60% REVENUE CERTI- ANNUAL SEPTEMBER 30 DEBT SERVICE OF 1965 ISSUE FICATES 1979 ISSUE DEBT SERVICE 1979 $. 91,968 $ 19,680 $ 25,561 $ 137,209 1980 89,948 19,095 153,370 262,413 1981 92,927 18,510 168,370 279,807 1982 80,727 17,925 177,245 275,897 1983 78,928 17,340 180,370 276,638 1984 82,127 16,755 178,120 277,002 1985 80,148 16,170 175,870 272,188 1986 82,657 15,585 173,620 271,862 1987 79, 860 176,370 256,230 1988 82,063 173,745 255,808 1989 84,021 171,120 255,141 1990 80, 800 173,495 254,295 1991 83, 280 176,095 259,375 1992 80,580 173,508 254,088 1993 82,880 175,920 -- 258,800 1994 258,020 258,020 1995 260,055 260,055 1996 256,500 256,500 1997 257,500 257,500 1998 ; 257,900 257,900 1999 262,700 262,700 2000 261,600 261,600 2001 264,900 264,900 2002 262,300 262,300 2003 264,100 264,100 2004 265,000 265,000 $1,252, 914 $141,060 $5,323,354 - $6,717,328 The 1979 utility tax certificates will be required to finance the City's share of the present wastewater facilities expansion program. All sewer revenue certificates are secured by a pledge of the revenues derived by Fort Walton Beach from the operation of the sewer plant, and from the proceeds of a tax imposed by the City upon every sale, receipt, purchase, possession, handling, distribution, and use of cigarettes in Fort Walton Beach. The utility tax revenue certificates will be secured by the proceeds of the utilities service tax imposed by the City upon every sale of electricity and butane, hydrogen, and water and telephone service in the City. “qotal reserve requirements for the prior issues have been fulfilled. The 1979 Utility Tax Certificate Issue requires a total reserve of $190,000. O£ this amount, $100,000 has been capitalized in the issue while the remaining $90,000 is to be paid in 24 equal monthly installments. DERIVATION OF THE USER CHARGE Based on the estimated operation, maintenance and replacement costs out- lined above and the initial expected annual wastewater flow (Table 1) the user | charge calculation for the equal strength discharges for the first full year of operation is as follows: User Charge = Total O & M Cost = 655,000 = $.70/1,000 Gals. Total Volume 930,000, 000 SURCHARGE FORMULA In the effort to insure that each User pays his equitable share of opera- tion and maintenance cost in proportion to such Users contribution to the total loading of the Wastewater Treatment Plant, a Surcharge formula was developed to be used in addition to the charges calculated using the normal rate schedule. This surcharge shall be applied to all users whose sewage has suspended solids, or biochemical oxygen demand in excess of the following concentrations: (1) BOD 220 ppm; (2) suspended solids 200 ppm. The additional charge for sewage having concentrations in excess of the foregoing shall be based on the cost per 1,000 Gals. determined according to the following formula: = (B- - : (1) Surcharge (B-220) + i oe 8:34 x $.17 = Cost/1,000 Gals. 2 Where B = Total User BOD in ppm S = Total User SS in ppm i] The surcharge cost will be multiplied by the users metered water consump- tion (in 1,000 Gals.). The calculated amount will then be added to the charges computed under the City's normal rate schedule to arrive at the users total monthly bill. TOXIC POLLUTANTS Any user which discharges any toxic pollutants which cause an increase in the cost of managing the effluent or the sludge of the City's treatment works shall pay the cost of such additional expense as documented by the City. RATE STRUCTURE The monthly sewer charge for collection and treatment of all wastewater discharged into the City's sewerage system is broken-down into two parts. The first part represents the user charge portion which is based on total operation and maintenance costs (refer to Page No. 6 for the derivation of this componant). This rate of $.70/1,000 Gals. is multiplied by the actual monthly water meter reading. For residential customers a maximum usage rate limit of of 16,000 gallons per month has been established. (NOTE: A maximum limit was set because of the nature of water consumption in this general geographic location. A considerable amount of water consumption is used for watering lawns and consequently does not reach the sewer system. Accordingly, an analysis was made of approximately 1,500 representative customer accounts for the months of November, December, January and February. This period was felt to represent a normal usage pattern. Of the four months, December's consumption was found to be greatest. An analysis of December's consumption of those accounts examined, indicated that 97% of the customers used less than 16,000 gallons.) (1) “fhe Analysis of 0 & M Costs for Municipal Waste Treatment Systems" Dames and Moore, for EPA, Feb. 1978 (Average) 7 The second part represents a flat rate per sewer unit (as defined in the ‘City of Fort Walton Beach Sewer Use Ordinance) for recovery of debt service and retained earnings. This amount was computed to be $4.75. Accordingly, the total monthly sewer bill is illustrated as the sum of the aforementioned parts as follows: Total Bill = Consumption (1) ($.70) + $4.75 (No. Units) (1,000 Gals.) The above sewer rate is applicable to all existing and future residential, commercial and industrial customers. (1) Residential consumption is limited to 16,000 gallons. ANNUAL REVIEW Pursuant to Federal Regulation 40 CFR 35.929-2(b) the City of Fort Walton Beach will review it's approved user charge system every two (2) years to deter- mine the wastewater contribution of users, the total cost of operation and maintenance of the treatment works and the adequacy of its user charge rate. After review Fort Walton Beach will revise (if necessary) the charges for users to accomplish the following: (1) Maintain the proportionate distribution of operation and maintenance costs among users (2) Generate sufficient, revenue to pay the total operation and maintenance costs necessary to the proper operation and maintenance (including replacement) of the treatment works (3) .Apply excess revenues collected from the user charge portion of the rate structure to the costs of operation and maintenance for the next year and adjust the rate accordingly.