The URL can be used to link to this page

Home My WebLink About2015 07 27 Other, Presentation by CPH, Inc under Item "601"LN Path Forward to Meet Stage 2 Disinfection By- Product (DBP) Compliance Presented to: City of Winter Springs July 27, 2015 Presented By: CPH Inc. How We Get Here.? Before Oct 2013, the City Continually Met Stage 1 Running Annual Average (RAA) DBP Regulatory Compliance Oct 2014, Stage 2 Locational RAA DBP Compliance Equity Triggered FDEP to Issue a Compliance Assistance Offer (CAO) April 15, 2015 FDEP Executed Consent Order No. 15 -0031 which requires construction completion byApril15, 2017 Maximum Contaminant Level (MCL) _ 8o µg /L 140 120 100 J � so 60 2 H 40 20 0 THM Trend 2009 to 2014 / �, / / / l'y / �3 ;lrl, / sy / sy +T•1 —LRAA- 1626 Wrentham LRAA - 647 Oneida LRAA-606 MORGAN LRAA - 410 Sandringham Date a ow Cost Operational Etta 011111,1116 Limited Use of High TDS /Bromide Wells #3E & #4E Hired Dedicated Experienced Staff Expanded Unidirectional Flushing Program Lowered Chlorine Residual at WTP #1 Balanced Control of Chlorine Residual through Ground Storage Tanks GHOXVIUSEKO 9MM 1-2 --- Trea ions Reviewei PARAMETERS Treatment DBP Formation Potential Cost Opinion for 5 -mgd FDEP Staffing Requirement Residuals Handling Central Florida Utilities Comments Treatment Options TOC Bromide H2S VOC THM /HAA Bromate Capital O &M 1 CTA +Cl2 Not Formed - -- - -- Category 0 Winter5 Spring Current treatment compliance driven by bromina[edTHMSpecies .. .... ..... ........ ......... ........ CTA+ NH2CI ........ ........ ..... .... ... ...... ......... ......... ......... .. ...... ......... ......... ......... ......... .... ....... ......... ......... ..... CT disinfection effectiveness requires more 2 - -- - -- j j j Not Formed $1.2 Mil $$ Category 5 No None disinfectant contact time. Potential for (Includes Cl2 contact chamber) nitrification in distribution system. $72,000 /yr Potential for Chloroform removal. More 3 Diffused Aerators Not Fo med $2.3 Mil Category 5 No None Difficult for Brominated THMs. Doesnot .. ............ ..... ........ .......... ............. ................ .................. .................. ................. ............ ............... Power .. ...... ......... ........... .............. ................. remove HAAS .... ....... .......... ......................... 4 FDA/Odor Control +Cl2 `v Not Formed $2.6 to $4.6 Mil $200'000 /yr Category 4 Yes Orange County Odor Control Blowdown Waste Disposal Power& Chem Odor Control Blowdown Waste Disposal. CT rj FDA/Odor Co ntro I+ N H2C I $8.8 Mil $$ Category 4 Yes Oviedo disinfection effectiveness rPot iresmore (includes Cl2 contact chamber) w w disinfectant contact time. Potential for .. ............ ..... ........ .......... ............. ................ .................. ............. ...... ............ nitrification in distributions system 6 % +012 1 $3.2 Mil $$ Category 4 NO OUC /Orange Bromate formation needsto be addressed County/Winter Park 7 GAC +Cl2 Not Formed $3.8 to $6.9 Mil $400,000 /yr Category 3 Yes None GAC exhaustion leadsto frequent GAC .. ............ ..... ........ .......... ............. ..................... .................. ........... ...... .......... ............ ............... GAC Replace .. ...... ......... ........... .............. ................. replacement .... ....... .......... ......................... 8 IX +Cl2 Not Formed $1.6 to 2.9 Mil $43,000 /yr Category 3 or Yes Wedgefield /St IX Regenerate salt loading to WWTP needsto be w .Salt Cloud /Chuluota addressed 9 O, +GAC +Cl2 T $7.1 to $10.2 Mil $$$ Category 2 Yes Sanford /Seminole Bromate formation and GAC exhaustion need be .. .... ..... ........ ......... ........ ........ ..... .... ... ...... ......... ......... ......... .. ...... ......... ......... ......... ......... County to addressed .... ....... ......... ......... ..... 10 IX +O, +Cl2 1 1 1 $4.8 to $6.1 Mil $$$ Category 2 Yes Seminole County - IX Regenerate saltloading to WWTP needsto be Markham Regional addressed Odor Control Blowdown Waste Disposal. GAC 11 FDA/Odor Control + GAC +Cl2 Not Formed $6.1 to $11.2 Mil $$$ Category 2 Yes Casselberry exhaustion leads to frequent GAC .. ................. ............ ..................... .................. ........... ...... .......... ............ ............... .. ...... ......... ........... .............. ................. replacement .... ....... .......... ......................... 12 FDA/Odor Control +IX +Cl2 Not Formed $5.8 to $7.1 Mil $$$ Category 2 g y Yes None IX Regenerate salt loading to WWTP needs to be w w w w addressed 13 RO /NF + FDA/Odor Control+ Not Formed $17.1 Mil $$$$ Category 2 Yes Palm Coast Concentrate disposal and CUP limitations be C12 need to addressed I I Legend: CTA Cascade Tray Aerator (100 %) Treatment Effectiveness: O &M Cost: FDEP Staffing Requirement* Cl2 Chlorine (100%) T Detrimental Increase $ Low Category Class C- Staffing by Class C Operator: 6 hrs /day for 5 days /week with Class C Lead Operator NH2CI Chloramines - All WTPs (100 %) No Change $$ Moderate Category 4 Class C- Staffing by Class C Operator: 6 hrs /day for 5 days /week with Class C Lead Operator FDA Forced Draft Aeration (100 %) Slightly Effective Reduction $$$ High Category 3 Class B- Staffing by Class C Operator: 16 hrs /day for 7 days /week with Class B Lead Operator 03 Ozone - Sidestream (100 %) Effective Reduction $$$$ Very High Category 2 Class B- Staffing by Class C Operator: 16 hrs /day for 7 days /week with Class B Lead Operator GAC Granular Activated Carbon (50% to 100 %) J Very Effective Reduction Category 1 Class B- Staffing by Class C Operator: 24 hrs /day for 7 days /week with Class A Lead Operator IX Ion - Exchange (50% to 100 %D) Reduced Staffing can be requested for systems with functional Systems Control and Data Acquisition SCADA) RO /NF Reverse Osmosis /Nanofiltration (50% to 100 %) 4 What is Recommended for Winter Springs to Maintain Stage 2 DBP Compliance? elll- Remain on Free Chlorine Continue Flushing Program Balance GST CIZ Residuals Remove DBP Precursors with IEX Seminole County — Markham Regional