Ocean Outfall Legislation Compliance

Transcription

1 Ocean Outfall Legislation Compliance City of Hollywood Department of Public Utilities LARGE USER MEETING October 2,

2 Agenda Regulatory Review Baseline Establishment Nutrient Reduction Options Reuse Alternatives 2

3 Regulatory Review HB 7139 / SB 1302 effective July 1, 2008 (Ch ) Outfall Nutrient Reduction by December 31, 2018 Elimination of Ocean Outfall (except in emergency) by December 31, 2025 > 60% of Outfall Flow to Reuse by December 31,

4 General Requirements SFWMD may require reuse of water made available by the elimination of ocean outfalls [FS (2) (d) Reuse of Reclaimed Water] Construction of new outfalls and expansion of new outfalls is prohibited [FS (9) (a)] Existing outfalls capped at capacity as of July 1, 2008 [FS (9) (a)] Outfall discharge prohibited after Dec. 31, 2025 except for functioning reuse system back-up [FS (9) (d)] 4

5 Baseline Nutrients and Flows FDEP to establish average TN and TP baseline loadings using monitoring data from 2003 to 2007 expressed as average annual daily loadings [FS (9) (b)] FDEP to establish Facility Actual Flows using monitoring data from 2003 to 2007 of flows through the outfall expressed as average annual daily flow [FS (9) (c)] 5

6 Nutrient Reduction [FS (9)(b)] Basic Nutrient Criterion discharge to meet AWT as defined under FS (4) namely 5/5/3/1 and HLD by Dec. 31, 2018 Alternatives Equivalent reduction in TN &TP baseline loadings Equivalent cumulative reduction in TN & TP from to AWT levels between Fully operational 100% reuse by Dec. 31,

7 Reuse Requirements [FS (9)(c)] Basic Reuse Criterion - Facilities discharging to ocean on 7/1/2008 must have functioning reuse system by 12/31/2025 A functioning reuse system means an environmentally, economically, and technically feasible system for 60% facility actual flow Alternatives Diversion of flow to other facilities counts toward the 60% if 100% is reused Diversion of 60% of combined outfall facilities for single utility 7

8 Planning Requirements [FS (9)(e)] Progress report and action item schedule by Dec. 31, 2009 Updated progress report and action item schedule every 5 yrs (2014, 2019, 2024) Detailed implementation plan to meet all requirements to be submitted by July 1, 2013 Updated plan by July 1, 2016 All outfall permits after July 1, 2008 will include an order with a compliance schedule 8

9 Baseline Establishment SRWWTP Outfall Data Average Flow 40.1 mgd Average TN Load 5,293 lbs/day Concentration = 15.8 mg/l Average TP Load 4,247 lbs/day Concentration = 1.3 mg/l 9

10 Nutrient Reduction Advanced Wastewater Treatment and Management Options Meet AWT Standards (5/5/3/1) TN and TP baseline load reduction equivalent to AWT standards (~ 7 mgd) Cumulative TN and TP reduction equivalent to cumulative reduction through AWT between % reuse by Dec. 31,

11 AWT Compliance Approaches Nutrient Reduction Alternative 1 Implement AWT Maximize use of existing injection wells ( 30 mgd to wells) AWT facilities for balance of flow (~30 mgd by 2025) Estimated cost >$300M 11

12 AWT Compliance Approaches Nutrient Reduction Alternative 2 Cumulative reduction Maximize use of existing injection wells ( 30 mgd to wells) Construct additional injection well (IW-3) no later than 2016 HLD facilities required Estimated cost $45M 12

13 AWT Compliance Approaches Nutrient Reduction Alternative 3 100% Reuse Construct necessary facilities by 2018 Maximum Reuse Alternative Salinity Barrier Canal Recharge Groundwater Recharge Dual distribution Estimated Capital Cost (60 mgd) >$1.5B 13

14 AWT Compliance Approaches Cumulative Reduction Recommended Strategy (IW-3) Lowest probable cost option Utilizes existing infrastructure Defers significant treatment plant modifications HLD facilities provide possible synergy w/ reuse strategy 14

15 Cumulative Reduction Strategies 15

16 Reuse Compliance Approaches Reuse Requirement 60% of Baseline Outfall Flow by 2025 ~ 25 mgd Reuse Alternatives Canal Discharge Biscayne Aquifer Discharge Floridan Aquifer Discharge Dual Distribution System Large User Pull-Out 16

17 Canal Discharge Indirect Potable Reuse Option Considered an extension to Biscayne Aquifer (F.A.C (b)) FDEP - Principal Treatment & Disinfection HLD, TN 10 mg/l unless WQBELs est. BCEPD TN 1.5 mg/l, TP 0.02 mg/l Membrane / LOT Treatment 17

18 Canal Discharge Regulatory Requirements CBOD TSS Ammonia (unionized) TN TP BCEPD FDEP 5 mg/l 20 mg/l -- 5 mg/l 0.02 mg/l 0.02 mg/l 1.5 mg/l 0-3 mg/l* 0.02 mg/l 0-1 mg/l* * WQBEL Limited 18

19 Canal Discharge Issues Disposal Location? Eventual Disposal to Tide Direct Impact on Coral Reefs Problem Exacerbated 19

20 Biscayne Aquifer Discharge Indirect Potable Reuse Option Class G-I Ground Water (F.A.C ) FDEP - Full Treatment & Disinfection NPDW, NSDW Standards, HLD, TN 10 mg/l BCEPD PO4-P 0.01 mg/l, COD 10 mg/l, Chlorides 250 mg/l Membrane / LOT Treatment 20

21 Biscayne Aquifer Discharge Regulatory Requirements CBOD BCEPD FDEP COD 10 mg/l -- TSS NO 3 / NO 2 -N 10 / 1 mg/l 10 / 1 mg/l NO 3 + NO 2 -N 10 mg/l -- TN Phosphate 5 mg/l 20 mg/l 5 mg/l 5 mg/l mg/l 0.01 mg/l -- TOC / TOX -- 3 / 0.2 mg/l Chlorides 250 mg/l -- 21

22 Canal / Biscayne Aquifer Discharge Treatment Alternatives New Treatment Train to Meet LOT MBR RO UV (AOP) Fine Screens, Primary Clarifiers BNR UF RO UV (AOP) Utilize Existing Tankage? Secondary Effluent Side stream Process BAF UF RO UV (AOP) BAF - Biological Aerated Filters Biscayne Aquifer - UF RO UV (AOP) 22

23 Reuse Alternatives 1 and 2 Canal / Biscayne Aquifer Discharge 23

24 Floridan Aquifer Discharge Indirect Potable Reuse Option Class G-II Ground Water (F.A.C ) TDS > 3,000 mg/l below 1,100 feet FDEP Primary Treatment & Disinfection + NPDW Standards BCEPD No differentiation between Class G-I and G-II GW Assume COD, PO4 and Cl- limits can be waived need to confirm 24

25 Floridan Aquifer Discharge Regulatory Requirements CBOD BCEPD FDEP COD 10 mg/l -- TSS NO 3 / NO 2 -N 10 / 1 mg/l 10 / 1 mg/l NO 3 + NO 2 -N 10 mg/l -- TN Phosphate 5 mg/l 20 mg/l 5 mg/l 5 mg/l mg/l 0.01 mg/l -- Chlorides 250 mg/l -- 25

26 Floridan Aquifer Discharge Treatment Alternatives New Treatment Train Diffused Air BNR Filters HLD MBR HLD Fine Screens, Primary Clarifiers Utilize Existing Process? Optimize SRT Pure Oxygen - Partial nitrification Convert to Diffused Air Full nitrification SCE Denite Filters HLD Side stream Process SCE BAF Filters HLD 26

27 Reuse Alternative 3 Floridan Aquifer Discharge 27

28 Expand Dual Distribution High Chloride Influent 21.6 mgd 3,000 mg/l Cl- Low Chloride Influent 41.5 mgd 150 mg/l Cl- Plus D/CC 6 mgd; NPW use at 4 mgd Separate Influent Streams and Treatment High Chloride to Deep Wells Low Chloride to Off-Site Reuse Peak Flow/Emergency Disposal to Outfall 28

29 Reuse Alternative 4 Expand Dual Distribution System 29

30 Reuse Alternative 4 Dual Distribution of 25 mgd 30

31 Large User Pull-Out Hallandale Beach 6.5 mgd AADF (2005) 10.9 mgd AADF in 2025 Pembroke Pines 7.5 mgd AADF (2005) 8.4 mgd AADF in 2025 Combined 2025 Flow 19.3 mgd 100% Reuse Flow Credit towards SRWWTP 60% Reuse Requirement 5.7 MGD SRWWTP 31

32 Reuse Alternative 5 Large User Pullout 32

33 Existing Condition (2007) 33

34 Year 2025 Condition 34

35 Estimated Reuse Alternative Costs Alternative 1 Canal Recharge $ M Alternative 2 Biscayne Recharge $ M Alternative 3 Floridan Recharge $ M Alternative 4 Dual Distribution $700M Alternative 5 Large User Pull-Out $? 35

36 Compliance Schedule 36

37 Recharge Pilot Test Issues Define Regulatory Standards COD, chlorides, phosphate, toxicity, microconstituents, etc. Determine Limits of Technology Determine Design Criteria Pretreatment, Treatment, Post-treatment, mixing zones, etc. Injection modeling, flow rates, pressures, well spacing, fate, etc. Determine degree of recharge 37

38 Reuse/Recharge Pilot Test Budget * Regulatory Discussions/Pre-design $1-1.5M Design/Permitting $ M Pilot Test Construction & Operation $ M Total Project Cost $15-20M * Assumes 3-yr test period 38

39 39 Discussion

40 Davie and Cooper City Effluent Disposal Options 40

41 Background In 1985 agreement between Davie, Cooper City, and Hollywood reserved a total of 10.5-mgd outfall capacity. Davie: mgd Cooper City: mgd In 1992 effluent disposal agreement was amended to include the construction of a 4-mgd reuse system. 41

42 Highlights of 1992 Amendment This was an action that prevented a building moratorium in City s served by the regional system. Allowed the expansion of the WWTP by reducing effluent discharge to the outfall via reuse. Ordered Davie and Cooper City to provide wastewater effluent to the regional system despite their objections. Provided Davie and Cooper City a total effluent disposal capacity of 14.5 mgd (4-mgd of reuse). 42

43 Davie Cooper City Effluent Disposal Options Option 1 Replace outfall capacity with new IW and HLD in the Regional System. Proportionally share the costs with the Large Users Continue sending 4-mgd of effluent to the plant. Wet weather discharge of reuse flows to IW system when necessary. 43

44 Davie Cooper City Effluent Disposal Options Option 2 Either Davie or Cooper City opt out of the outfall and build their own capacity for effluent disposal. Either Davie or Cooper City proportionally shares costs to build IW and HLD with Large Users. Continue sending 4-mgd of effluent to the plant. Wet weather discharge of reuse flows to IW system when necessary. Would require 100 percent reuse of diverted flow 44

45 Davie Cooper City Effluent Disposal Options Option 3 Both Davie and Cooper City opt out of outfall and build their own capacity for effluent disposal. Continue sending 4-mgd of effluent to the plant. Wet weather discharge of reuse flows to IW system when necessary. Would require 100 percent reuse of diverted flow 45

46 Recommended Action Plan Initial Phase 1. Construct additional injection well capacity with HLD to meet nutrient reduction requirements. 2. Initiate Biscayne / Floridan aquifer recharge pilot project to assess treatability and regulatory issues with stakeholders. 3. Discuss effluent disposal options with Davie and Cooper City to determine their desired course of action. 4. Upon completion of pilot study, evaluate approach to meet 60-percent reuse requirement (2025). 46

47 Preliminary Analysis of Rate Requirements for Initial Phase (2018) Option A Construction of one (1) IW with HLD Biscayne / Floridan Aquifer recharge pilot study Preliminary rate estimate (1) : $2.50 $2.70 per thousand gallon Option B Construction of two (2) IWs with HLD Biscayne /Floridan Aquifer recharge pilot study Preliminary rate estimate (1) : $2.70 $2.90 per thousand gallon Notes: 1. Preliminary rate based on capital requirement and does not include O&M costs. 47

48 Where do we go from here 1. Large Users to review recommended options. 2. Negotiations with Davie and Cooper City relative to options they wish to exercise. 3. Schedule a special Large User meeting to gather feedback and decide on recommended options. 4. Submit proposed plan of action to FDEP. 5. Draft amendment to Large User Agreement and Davie/Cooper City Effluent Disposal Agreement. 48

49 Questions 49