Streamlining Regulations: San Francisco s Non-potable Water Program

Transcription

1 Services of the San Francisco Public Utilities Commission Streamlining Regulations: San Francisco s Non-potable Water Program October 9, 2012 Paula Kehoe, Water Resources Director Sarah Rhodes, Water Resources Engineer 1

2 Presentation Outline Overview of the SFPUC Water Supply Portfolio Non-potable Water Program Additional City Water & Sewer Ordinances 2

3 Services We Provide

4 Regional Water System

5 Diversifying Our Water Supply Portfolio Conservation: reduce demands by 4 mgd Municipal Recycled Water: produce 4mgd Local Groundwater: develop potable supply 4mgd Conjunctive Use: develop 7.2 mgd for droughts 5

6 Alternate Water Sources 6

7 Existing Non-potable Programs for Residential Customers Rainwater Harvesting Program Residential Graywater Program 7

8 Alternate Water Sources Available within Buildings 8

9 On-site Non-potable Water Use at the New SFPUC Headquarters Living Machine constructed wetland system treats blackwater & graywater for flushing toilets 9

10 On-site Non-potable Water Projects are being Proposed in San Francisco Transbay Rainwater & graywater for toilets Public Health & Safety Rainwater, graywater, blowdown for toilets & irrigation Moscone Center Foundation drainage for irrigation 10

11 Integrating On-site Non-potable Water Use is Challenging 11

12 Role of City Agencies SFPUC SFDPH SFDBI Program Administration Review on-site non-potable water supplies & demands Administer citywide project tracking & annual potable offset achieved Provide technical support & outreach to developers Provide financial incentives to developers Public Health Issue water quality & monitoring requirements Review and approve nonpotable engineering report Issue permit to operate onsite systems Review water quality reporting Construction Conduct Plumbing Plan check and issue Plumbing Permit Inspect and approve system installations 12

13 Key Steps for On-Site Systems Three Important Phases Critical Steps to Take within Phases Design Construction Operation 13

14 Major Steps for Designing Your On-site System Application Non-potable Water Engineering Report Plumbing Permit DESIGN Construction Operation 14

15 Steps to take During Design Phase Step 1: Application Submit your on-site application to the SFPUC as soon as possible Receive technical and regulatory guidance to move forward on your project Step 2: Non-potable Water Engr. Rpt (NWER) Submit NWER to SFDPH detailing design and technical aspects for meeting water quality requirements Step 3: Plumbing Permit Submit plumbing plans to SFDBI cross connection protection and bypass capabilities NWER approval is a pre-requisite for issuance of plumbing permit 15

16 Water Quality Criteria Consistent with State Codes Alternate Water Source Blackwater Title 22 Graywater Rainwater Proposed Regulations California Plumbing Code - NSF-350 California Plumbing Code - Table Stormwater Foundation Drainage No state codes - SFDPH to establish SFDPH will permit onsite systems and require monitoring and reporting 16

17 Steps to take During Design Phase Step 1: Application Submit your on-site application to the SFPUC as soon as possible Receive technical and regulatory guidance to move forward on your project Step 2: Non-potable Water Engr. Rpt (NWER) Submit NWER to SFDPH detailing technical aspects for meeting water quality requirements Step 3: Plumbing Permit Submit plumbing plans to SFDBI cross connection protection and bypass capabilities NWER approval is a pre-requisite for issuance of plumbing permit 17

18 Major Steps for Constructing Your On-site System Construction Requirements Construction Certification Letter Cross Connection Inspection Design CONSTRUCTION Operation 18

19 Steps to take Post-Construction Step 4: Construction Requirements Signage & identification, bypass, make-up water Step 5: Construction Certification Letter Submit letter to SFDPH certifying systems was constructed in accordance with NWER Step 6: Cross Connection Control Certify all backflow prevention assemblies Certify potable and non-potable water systems are not crossconnected. Both test are required prior to SFDBI sign-off 19

20 System Construction - Identification Purple pipe for all non-potable water Pipe labeling and signage will identify type On-site Treated Non-potable, Rainwater, Recycled, etc. Consistent with proposed 2013 California Plumbing Code CAUTION: ON-SITE TREATED NON-POTABLE WATER USED FOR IRRIGATION DO NOT DRINK 20

21 System Construction Make-Up Water Municipal recycled water as make-up/backup supply to on-site non-potable water systems: If RW not available, potable water will be supplied Same backflow protection requirements as potable Recycled or Potable supplied by SFPUC ON-SITE TREATED NON-POTABLE WATER 21

22 Steps to take Post-Construction Step 4: Construction Requirements Signage & identification, bypass, make-up water Step 5: Construction Certification Letter Submit letter to SFDPH certifying systems was constructed in accordance with NWER Step 6: Cross Connection Control Certify all backflow prevention assemblies Certify potable and non-potable water systems are not crossconnected. Both test are required prior to SFDBI sign-off 22

23 Major Steps for Operating Your On-site System Start-Up Permit (90 days) Temporary Use Permit (9 months) Final Use Permit (annual renewal) Design Construction OPERATION 23

24 DPH Permits for Operating Your System Start-Up Permit (90 days) On-site water is treated and sent to sewer to allow for fine-tuning and troubleshooting of system. Temporary Use Permit (9 months) On-site water is treated and supplied to non-potable end uses. More frequent monitoring while system is further refined. Final Use Permit (annual renewal) Continued operation, monitoring and reporting to ensure water quality compliance. 24

25 Draft Monitoring and Reporting Frequency System Type Start-Up Mode (90 days) Temporary Use Mode (9 months) Final Use Mode Rainwater NSF-350 Certified (graywater) Foundation Drainage Graywater Blackwater WQ Testing Not required Not required Weekly Weekly Dail Reporting n/a n/a Weekly Weekly Weekly WQ Testing Not required Weekly Weekly Weekly Daily Reporting n/a Monthly Monthly Monthly Monthly WQ Testing Monthly Monthly Monthly Monthly Daily Reporting Annually Annually Annually Annually Monthly **Anticipated frequency subject to change and approval by SFDPH 25

26 SFPUC provides technical assistance and financial incentives On-site Non-potable Guidebook Water use Calculator Grant Program Project review meetings 26

27 Water Use Calculator Sheet No. Proposed Regulations Step 1 Step 2 Step 3 Step 4 Step 5 Step 6 Step 7 Basic Project Information Calculate Indoor Water Demand Calculate Indoor Non-potable Supply Calculate Outdoor Water Demand Calculate Outdoor Non-potable Supply Summary of Building Potential Define Project Specific Demands & Supplies Default values are provided based on: SFPUC Water Demand Conservation Model SF Green Building Requirements LEED Default Occupancy Counts 27

28 Water Use Calculator 28

29 Potential Potable Water Savings Building Type Potable Water Offset (gpy) 40K sf 100K sf 200K sf 500K sf % Potable Water Reduction Office 119, , , M 78% Mixed Use Development 175, , , M 22% 29

30 Estimated Costs for On-site Systems Bldg. Size (sf) Treatment Systems ($M) Dual-Collection System ($M) Dual- Distribution System ($M) Total Capital ($M) % Constr. Cost 500K % - 3.5% 200K % - 3.5% 100K % - 3.7% 40K % - 5.5% 30

31 Grant Program for Large Alternate Water Source Projects The SFPUC will offer financial incentives for new projects that replace potable water use with onsite alternate water sources Proposed projects shall be 100,000 sf or more Proposed projects shall replace potable water use for one of the following: All toilet flushing demands or Reduce 40% of potable water use 31

32 Summary of Non-potable Water Program Resources Water Use Calculator Grant Program Guidebook SFDPH Rules and Regulations Project Application Technical Assistance 32

33 Conclusion The SFPUC is excited about the Non-potable Water Use Program as it: Streamlines the process for developers Reduces combined sewer impacts from new developments Replaces the use of drinking water for toilet flushing and irrigation in new large developments and commercial structures Next Steps: District Scale Water/Wastewater Utility Study 33

34 Additional Water, Sewer, and Stormwater Requirements 34

35 Water Efficient Plumbing Require properties to repair plumbing leaks and replace inefficient plumbing fixtures with high-efficiency models Residential retrofits are required on resale or time of major improvements Commercial retrofits are required by 2017 or major improvements 35

36 Water Efficient Irrigation Projects with 1,000 square feet or more of new or modified landscape area Requires design, installation, & maintenance of efficient irrigation systems. Requires utilization of low water-use plantings, and calculation of water budget 36

37 Recycled Water Ordinance New developments & major alterations over 40,000 SF Irrigated landscapes over 10,000 sf Requires recycled water systems for toilet/urinal flushing, irrigation, & cooling. 37

38 Stormwater Design Guidelines Ground disturbances over 5,000 SF Requires projects to manage a portion of their stormwater on-site In Combined Sewer Areas equivalent to LEED Sustainable Sites Credit 6.1 In Separate Sewer Areas equivalent to LEED Sustainable Sites Credit

39 Thank You Paula Kehoe Water Resources Director Sarah Rhodes, P.E. Water Resources Engineer 39