San Francisco Non-Potable Program Update John Scarpulla Water - - PowerPoint PPT Presentation

John Scarpulla Water Resources Planner San Francisco Public Utilities Commission

San Francisco Non-Potable Program Update

Buildings Are Water Resources

Precipitation collected from roofs and above- grade surfaces Precipitation collected at or below grade Nuisance groundwater from dewatering

• perations

Wastewater from clothes washers, bathtubs, showers, and sinks Wastewater from toilets, dishwashers, kitchen sinks, and utility sinks

SFPUC Headquarters

Integrating On-site Non-potable Water Is Challenging

• Regulatory questions:
• Who should set water quality standards?
• Who should issue permits and provide operational
• versight?
• What type of on-going monitoring and reporting should

be implemented?

City Ordinance Streamlines Permitting Process

SFPUC SFDPH SFDBI Program Administration Public Health Construction

Review on-site non-potable water supplies & demands Administer citywide project tracking & annual potable

• ffset achieved

Provide technical support &

• utreach to developers

Provide financial incentives to developers Issue water quality & monitoring requirements Review and approve non- potable engineering report Issue permit to operate on-site systems Review water quality reporting Conduct Plumbing Plan check and issue Plumbing Permit Inspect and approve system installations

SFPUC Assistance

• On-site Non-potable

Guidebook

• Water Use Calculator
• Grant program
• Project review meetings

SFPUC Grant Program SFPUC offers up to $250,000 for individual buildings

• Must be 100,000 sf or more
• Must replace potable water for one of the following:
• All toilet flushing demands or
• Offset 40% of potable water use

11 New Projects Proposing to Offset 5.3 Million Gallons Per Year

Transbay Transit Center- 3.5 million gallon potable offset

Transbay Transit Center

Rainwater & graywater for toilets

Transbay Tower- 145,000 gallon potable offset

Transbay Tower

Rainwater for toilet flushing and irrigation

PG&E Building- 110,000 gallon potable offset

PG&E Building

Foundation drainage for toilets

AVA Apartment Building- 18,000 gallon potable offset

AVA Apartment Building

Rainwater for irrigation

Broadway Sansome- 180,000 gallon potable offset

Broadway Sansome Affordable Housing

Rainwater and stormwater for toilet flushing

Crescent Heights- 53,000 gallon potable offset

Crescent Heights Apartment Building

Rainwater for toilet flushing

Market Street Place- 370,000 gallon potable offset

Market Street Place

Rainwater for toilet flushing

Public Safety Building- 1.5 million gallon potable offset

Public Safety Building

Graywater, rainwater, & stormwater for toilet flushing, irrigation, and cooling

6th Street Affordable Housing- 45,000 gallon potable offset

6th Street Affordable Housing

Rainwater for toilet flushing

Moscone Center

Moscone Center

Foundation drainage for multiple end uses on two parcels

Expand Program to Address District-Scale Water Systems

Non-potable Ordinance amended, includes district-scale & requires:

• encroachment permit process
• legal agreements & easements

between property owners SFPUC grant program expanded:

• Offering up to $500,000 for multi-

parcel projects that will utilize 3 MGY or more on-site

Thank You