The URL can be used to link to this page

Home My WebLink AboutItem #06 Conversion of Water Plants to Bulk Supply Liquid Chlorine AGENDA ITEM COVER SHEET Meeting Date: May 2, 2006 Item # (g Contact Name: Contact Number: Charles K. Smith, P.E. (407) 905-3100 ext. 4000 Reviewed By: Department Director: City Manager: Subject: Conversion of South Water Plant and Forest Oaks Water Plant to Bulk Supply Liquid Chlorine. Background Summary: Currently, both the South and Forest Oaks water plants use free chlorine as the primary method of water treatment. Each plant uses "on-site generation" to create liquid chlorine. The unit's process equipment, which is used to generate the chlorine, has reached the end of its' service life (ten years) cycle and needs to be either refurbished or replaced with another source of liquid chlorine. Wherein staff is recommending the purchase of bulk chlorine supply. To be able to convert the water treatment plants to bulk chlorine, the chlorine feed system and dosing pumps will need to be replaced as opposed to the replacement of the chlorine generators. This action is subject to City Commission approving F.Y. 2005/2006 Mid Year Budget, which includes funding for conversion projects. Issue: Should City Commission approve the conversion of the City's water plants to use bulk supply liquid chlorine? Recommendations Staff is recommending the awarding of the conversion work to Guardian Equipment, Inc. and will be piggybacking off of Guardian's contract with Seminole County in the amount of $18,386.50 for the South Water Plant and $18,772.00 for the Forest Oaks Water Plant; and staff also recommends that it procure liquid bleach needed for the remainder of fiscal year 2005/2006 from Odyssey. Inc. and will be piggybacking the Odyssey contract with the City of Mulberry, Florida, in a not to exceed amount of $35,000.00. Attachments: Guardian Equipment, Inc. proposal for Chemical Feed System for South Water Plant. Guardian Equipment, Inc. proposal for Chemical Feed System for Forest Oaks Water Plant. Guardian Equipment, Inc. proposal for Chemical Feed System for City of Ocoee Wastewater Treatment Plant. Financial Impact: The conversion of the Water Plants is included within the Fiscal Year 2005-2006 Mid-Year Budget. Attached is a twenty-year financial review comparing of on-site generation to bulk supply. The review predicts a present value assessment that using on-site generation is $1,604,152 compared to $1,429,162 for bulk supply over the twenty- year period. In addition to these lower costs, the City will realize an initial savings of $42,842.00 in the capital budget by not replacing the on-site chlorine generation equipment. Type of Item: (please mark with an 'x'? _ Public Hearing _ Ordinance First Reading Resolution ~ Commission Approval For Clerk's Deat Use: _____ Consent Agenda _____ Public Hearing _____ Regular Agenda Discussion & Direction Original Document/Contract Attached for Execution by City Clerk Original Document/Contract Held by Department for Execution Reviewed by City Attorney Reviewed by Finance Dept. Reviewed by ( ) N/A N/A N/A Citv Manae:er Robert Frank Commissioners Dannv HowelL District 1 Scott Anderson. District 2 Rustv Johnson. District 3 Nancv J. Parker. District 4 Mavor S. Scott Vandere:rift STAFF REPORT TO: The Honorable Mayor and City Commissioners FROM: Charles K. Smith, P.E., Utilities Director DATE: May 2, 2006 RE: Conversion of South Water Plant, Forest Oaks Water Plant and Ocoee Sanitary Sewer Treatment Facility to Bulk Supply Liquid Chlorine ISSUE Should City Commission approve the conversion of the City's water plants to use bulk supply liquid chlorine? BACKGROUND/DISCUSSION Currently, both the South and Forest Oaks water plants use free chlorine as the primary method of water treatment. Each plant uses "on-site generation" to create liquid chlorine. The unit's process equipment, which is used to generate the chlorine, has reached the end of its' service life (ten years) cycle and needs to be either refurbished or replaced with another source of liquid chlorine. Wherein staff is recommending the purchase of bulk chlorine supply. To be able to convert the water treatment plants to bulk chlorine, the chlorine feed system and dosing pumps will need to be replaced as opposed to the replacement of the chlorine generators. This action is subject to City Commission approving F.Y. 2005/2006 Mid Year Budget, which includes funding for conversion projects On-Site Sodium Hypochlorite Generation Estimated Whole-Life Cost Comparison for Both Forest Oaks and South Water Plants Modified By City of Ocoee - Staff Treabnent Plant Infonnation Instantaneous Flow gpm 3,500 Flow Mgd 5.04 Chlorine Dose ppm 6.00 Duty Time 100% Annual Oxidizer Demand Pounds CI2 91,980 Oxidizer Demand Pounds CI2 Per Day 252 CaDital Cost Sevem Trent Services ClorTec OSHG $ 80,000.00 Chlorine Gas $ - 12% Bulk Sodium Hypochlorite $ 44,000.00 Raw Material Concentration Chlorine Gas NaOCI12% (Degraded By 10%) over cyde 11.40% OSHG Raw Material ConsumDtion Severn Trent Services ClorTec Salt Pounds per Pound CI2 Equivalent 4.0 Power kWh per Pound CI2 Equivalent 3.0 Addional Power to Support Unit Prosses 1.0 Raw Material Cost Chlorine Gas per Pound $ 0.40 12% Bulk Sodium HVDochlorite Cost per Gallon $ 0.65 Salt Cost oer Pound $ 0.04 kWh Cost $ 0.070240 Fullv Burdened Labour Cost Per Hour $ 35.00 Estimated Annual Plant ODeration Labor (Hours) Sevem Trent Services ClorTec OSHG 550.00 Chlorine Gas 100.00 12 % Sodium Hypochlorite 26.00 Price Escalation Chemical Price Index 105% Consumer Price Index 104% Electrical 106% $0 $20,000 $40,000 $60,000 $80,000 $100,000$120,000$140,000$160,000 .ClorTec OSHG 1ii112% Sodium Hypochlorite , . Net Present Value $1,604,152.10 $1,429,162.71 ClorTec OSHG 12% Sodium Hypochlorite I YEAR! Capital Cost $80,000.00 $37,158.50 Annual Labor $20,020.00 $910.00 Annual Maintenance/Replacements $14,010.00 $0.00 Power Cost $25,842.70 $0.00 Operation Raw Materials $3,679.20 $62,883.38\ TOTAL COST (yr. 1) $143,551.90 $100,951.88 Present valuel $143,551.901 $100,951.881 ~1 Capital Cost $0.00 $0.00 Annual Labor $20,820.80 $946.40 Annual Maintenance/Replacements $14,570.40 $300.00 Power Cost $27,393.26 $0.00 Operation Raw Materials $3,826.37 $66,027.551 TOTAL COST (yr. 2) $66,610.83 $67,273.95 Present Valuel $64,048.881 $64,686.49 YEAR ~ Capital Cost $0.00 $0.00 Annual Labor $21,653.63 $984.26 Annual Maintenance/Replacements $3,979.42 $300.00 Power Cost $29,036.86 $984.26 Operation Raw Materials $3,979.42 $69,328.921 TOTAL COST (yr. 3) $58,649.34 $71,597.44 Present Valuel $54,224.611 $66,195.85 YEAR! Capital Cost $0.00 $0.00 Annual Labor $22,519.78 $1,023.63 Annual Maintenance/Replacements $4,138.60 $300.00 Power Cost $30,779.07 $0.00 Operation Raw Materials $4,138.60 $72,795.371 TOTAL COST (yr. 4) $61,576.05 $74,119.00 Present Valuel $54,740.881 $65,891.52 YEAR~ Capital Cost $97,332.23 $0.00 Annual Labor $23,420.57 $1,064.57 Annual Maintenance/Replacements $4,304.14 $300.00 Power Cost $32,625.81 $0.00 Operation Raw Materials $4,304.14 $76,435.141 TOTAL COST (yr. 5) $161,986.90 $77,799.71 Present valuel $138,467.081 $66,503.52 ClorTec OSHG 12% Sodium Hypochlorite , . YEAR ~ Capital Cost $0.00 $0.00 Annual Labor $24,357.39 $1,107.15 Annual Maintenance/Replacements $4,476.31 $300.00 Power Cost $34,583.36 $0.00 Operation Raw Materials $4,476.31 $80,256.901 TOTAL COST (yr. 6) $67,893.37 $81,664.05 Present valuel $55,803.401 $67,121.90 YEAR Z Capital Cost $0.00 $0.00 Annual Labor $25,331.69 $1,151.44 Annual Maintenance/Replacements $4,655.36 $300.00 Power Cost $36,658.36 $0.00 Operation Raw Materials $4,655.36 $84,269.741 TOTAL COST (yr. 7) $71,300.78 $85,721.18 Present Valuel $56,350.041 $67,746.69 YEAR.!! Capital Cost $0.00 $0.00 Annual Labor $26,344.95 $1,197.50 Annual Maintenance/Replacements $4,841.58 $300.00 Power Cost $38,857.87 $0.00 Operation Raw Materials $4,841.58 $88,483.231 TOTAL COST (yr. 8) $74,885.97 $89,980.72 Present Valuel $56,907.191 $68,377.96 YEAR 2- Capital Cost $0.00 $0.00 Annual Labor $27,398.75 $1,245.40 Annual MaintenancelReplacements $5,035.24 $300.00 Power Cost $41,189.34 $0.00 Operation Raw Materials $5,035.24 $92,907.391 TOTAL COST (yr. 9) $78,658.57 $94,452.79 Present valuel $57,475.051 $69,015.73 YEAR 10 Capital Cost $118,419.54 $0.00 Annual Labor $28,494.70 $1,295.21 Annual Maintenance/Replacements $5,236.65 $300.00 Power Cost $43,660.70 $0.00 Operation Raw Materials $5,236.65 $97,552.761 TOTAL COST (yr. 10) $201,048.24 $99,147.97 Present Valuel $141,253.831 $69,660.05 ClorTec OSHG 12% Sodium Hypochlorite YEAR 11 Capital Cost Annual Labor Annual Maintenance/Replacements Power Cost Operation Raw Materials TOTAL COST (yr. 11) $0.00 $29,634.49 $5,446.11 $46,280.34 $5,446.11 $86,807.06 $0.00 $1,347.02 $300.00 $0.00 $102,430.401 $104,077.42