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1990-11-01 WorkshopV1 lUY U1 V111UUU11U UU(j C I T Y C O U N C I L W O R K S H O P November 1, 1990 - 7:00 P.M. SUMMARY OF COUNCIL DISCUSSION PG I OF 5 COUNCILMEMBERSIAC7I0N YES W J-tA&SEM A. Call workshop to order. Mayor Chapman called the workshop to order at 7:00 P.M. B. Mayor and Council attendance: Mayor Oakland R. Chapman Present Councilman R.R. "Nick" Collins Present Councilman James "Jim" Kirk Present Councilman Oscar Thomas Present Councilman Dowling R. Watford, Jr. Present Staff attendance: City Attorney John R. Cook Present City Administrator John J. Drago Present City Clerk Bonnie S. Thomas Absent City Deputy Clerk S. Lane Earnest Present C. Discuss the Groundwater Feasibility Study - Discussion of GROUNDWATER FEASIBILITY STUDY: Engineer Bill Reese. Engineer Reese presented the Council with afeasbility study which included the following recommendations: "The following recommendations are based on the findings of this study. The recommendations are intended to be taken sequentially, as presented. Collectively, they represent a plan for the elimination of the existing water problems and a mechanism to maintain treatment and pumping capabilities ahead of demands. Obviously, changes to regulatory criteria can require a modification to the program. After the engineer is authorized to proceed with the design, permitting, and the construction phase of the work, the following steps should be completed, in order: NOVEMBER 1. 7990 - WORKSHOP MEETING PG 2 OF 5 COUNCILMEMBERS/ACTION VOTE YES NO ABSEM 1. fye dt a consumptive use permit application for the well r_! Discusion Continued I 2. Prepare design, permitting and bidding documents for the wells. The drilling and testing will be done one at a time, so each successive well will benefit from data obtained from the previous. This also minimizes risk exposure if a currently unknown problem is encountered. It is probable that data from the first test production consumptive use permit. 3. Proceed accordingly with design, permitting, and construction of upgrade facilities for the existing WTP. In the interest of cost savings it may be prudent to incorporate this construction with the new WTP construction. 4. Proceed with pilot testing of the surficial aquifer well. This should be done during the aquifer performance test required by SFWMD to avoid cost redundancy. If the results of the pilot study indicate effective treatment with Mn- Greensand, proceed with design accordingly. Otherwise, proceed with design of a lime softening facility. 5. After all wells are drilled and full analytical testing completed, proceed with construction of the water treatment plant. The plant should be designed, permitted and bid while the wells are being constructed and tested. 6. Continue contact with the power company to define beneficial inter -relationships at it relates to water source and treatment'capabilities. 7. In early 1993 establish a firm commitment for water with the power company and/or, commence investigations for additional groundwater resource to expand the existing facility. 8. Maintain a constant awareness of the need for future well sites north of the City and secure sites with access when feasible. Total Preliminary Cost Estimate for Mn-Greensand Filtration Plant $3,505,000.00 Total Preliminary Cost Estimate for Lime Softening Plant C. Discussion Continued . . . NOVEMBER 1, 1990 - WORKSHOP MEETING COUNCILMEMBERS/ACTION As per the Council's request Engineer Bill Reese of Reese, Macon and Associates brief ly reviewed the existing water treatment plant to give recommendations and/or modifications. Engineer Reese recommendations are as follows with cost estimates: 1. Delete softening and use circular basin for stabilization and/or standby settling. "Historical records show that the water is softened infrequently and only a limited amount when softening does occur. Further, the existing plant configuration does not permit the delivery of a stabilized water to both sets of filters. (The old filters receive a very low pH water and the newer filters receive a very high pH water). This leads to continuing problems with filtration, high maintenance costs and difficult operation. To further complicate this matter, lime is used for pH stabilization in the circular basin. Overfeeding is necessary due to plant hydraulics,, as discussed above, which yields a lime sludge problem and inefficient chemical usage. Abandonment of softening, and conversion of the circular basin is recommended. Although it is prudent to maintain the lime feeders for emergency use, conversion to 50% sodium hydroxide in recommended for pH adjustment. Confirmatory data on the conversion to sodium hydroxide is attached for your use." Preliminary Estimated Total Cost - $300,000.00 2. Replace existing carbon feeder. "The existing carbon feeder is not of adequate capacity to meet all possible. demands and should be equipped with a bag breaker, exhaust fan and filter. The equip[ment can be located at the same position as the existing." Preliminary Estimated Total Cost - $94,000.00 PG 3 OF 5 VOTE W1 NOUFMBFR 1. 1990 - WORKSHOP MEETING PG4OF5 COUNCILMEMBERS/ACTION VOTE YES W ASSFNf 3. New polymer feed system. C,. Discussion Continued "This facility should have a simplistic polymer feed system for treatment flexibility." Preliminary Estimated Total Cost - $2,000.00 4. New phosphate feed system. ' "Sodium hexametaphosphate will help to polish the finish water and impede any corrosive tendencies." Preliminary Estimated Total Cost - $20,000.00 5. Replace existing dry alum feed with liquid. "Converting from dry to liquid feed will have a significant impact on operator time for loading and maintenance for the alum feeders. In addition, the unit cost savings converting to liquid alum will result in net chemical savings of $60,000-$70,00 per year." �! ti Preliminary Estimated Total Cost - $95,000.00 6. Replace transfer pumps. "The existing transfer pumps do not have sufficient capacity to deliver the total plant flow with one out of service. The city has advised that there are two new replacement pumps and motors on -site and available for installation." Preliminary Estimated Total Cost - $33,000.00 Following a lenghty discussion among Council and Engineer Reese is was agreed upon to have subject as an agenda item and make final decision at the next Council meeting. (item was on 12/04/90 agenda) ADJOURNMENT Mayor Chapman: NOTICE IS HEREBY GIVEN THAT IF ANY PERSON SHOULD DECIDE TO APPEAL ANY DECISION MADE AT THIS MEETING OF THE CITY COUNCIL, SUCH PERSON WILL NEED TO INSURE THAT A VERBATIM RECORD OF THE PROCEEDING IS MADE WHICH INCLUDES THE TESTIMONY AND EVIDENCE UPON WHICH THE APPEAL IS BASED. A COPY OF THE RECORDING CAN BE OBTAINED IN THE CITY CLERK'S OFFICE. &Oakland-R. C apman, ayor Attest: Bonnie Tlramas, City Clerk, CMC NOVEMBER 1, 1990 - WORKSHOP MEETING PG 5 OF 5 FV�OT�E� COUNCILMEMBERS/ACTION W Mayor Chapman adjourned the workshop at 8:56 P.M.