GRAND OPENING EVENT

ALTAGAS POMONA ENERGY STORAGE FACILITY

About AltaGas

AltaGas is a 23-year old company, headquartered in Calgary, Alberta. Our strategy is to capitalize on opportunities created by the renaissance of natural gas in North America and the increasing global demand for clean energy.

~2 Bcf/d of natural gas transacted• Processing and moving natural gas and

natural gas liquids to key markets, including Asia

1,688 MW of power generation in four fuel types and 20 MW of energy storage• Generating clean energy with natural gas and

renewable sources

5 Utilities serving over 565,000 customers• Delivering clean and affordable natural gas to

homes and businesses

1,700 employees drive best in class operations

Gas Processing

Storage Facility Under Construction

Storage Facility

Regional LNG Facility Under Construction

Gas Processing Under Development

Gas

PowerWind Power Generation

Hydro Power Generation

Biomass Power Generation

Gas-Fired Power Generation

Gas-Fired Power Generation Under Development

Utilities

Utilities

Gas Processing Under Construction

LPG Under Development

Energy Storage

Proposed Expansion to Existing Facility

Gas Processing

Storage Facility Under Construction

Storage Facility

Regional LNG Facility Under Construction

Gas Processing Under Development

Gas

PowerWind Power Generation

Hydro Power Generation

Biomass Power Generation

Gas-Fired Power Generation

Gas-Fired Power Generation Under Development

Utilities

Utilities

Gas Processing Under Construction

LPG Under Development

Energy Storage

Proposed Expansion to Existing Facility

AltaGas’ Presence in California

AltaGas owns six natural gas-fired power generating facilities in California that safely produce power.

• AltaGas has a long standing history of building trust and treating stakeholders with respect in communities where it develops and operates projects.

• AltaGas’ California sites can provide a wide variety of energy products including gas-fired generation, energy storage, and solar.

• Existing Pomona facility is a 44.5 MW gas-fired peaking plant strategically located in the Los Angeles load pocket.

• Repowered facility could be comprised of more efficient gas-fired technology with capacity up to 100 MW.

• Largest battery storage facility in North America.

Sacramento

Los Angeles

Blythe

Gas-Fired Power Generation

Gas-Fired Power GenerationUnder Development

Energy Storage

Gas Processing

Storage Facility Under Construction

Storage Facility

Regional LNG Facility Under Construction

Gas Processing Under Development

Gas

PowerWind Power Generation

Hydro Power Generation

Biomass Power Generation

Gas-Fired Power Generation

Gas-Fired Power Generation Under Development

Utilities

Utilities

Gas Processing Under Construction

LPG Under Development

Energy Storage

Proposed Expansion to Existing Facility

Gas Processing

Storage Facility Under Construction

Storage Facility

Regional LNG Facility Under Construction

Gas Processing Under Development

Gas

PowerWind Power Generation

Hydro Power Generation

Biomass Power Generation

Gas-Fired Power Generation

Gas-Fired Power Generation Under Development

Utilities

Utilities

Gas Processing Under Construction

LPG Under Development

Energy Storage

Proposed Expansion to Existing Facility

Our Commitment to Safety

“We conduct our business activities safely or we don’t move forward until it can be done safely”

• Safety is a core value at AltaGas and is an integral part of how we operate. It is our position that AltaGas operates all aspect of our business with the highest regard for the safety of our employees, contractors and anyone impacted by our operations.

• Our employees throughout Canada and the United States are endowed with the responsibility to exhibit safe behaviors and take the steps necessary to encourage the same behaviors in others.

• Ownership for safety lies with each and every AltaGas employee at all levels in the organization.

• AltaGas constantly evaluates our systems and processes to identify opportunities for improvement in our safety programs which leads to continuous improvement in our safety performance.

The safety of our employees and the public is AltaGas’ top priority.

Well Positioned in California

Blythe Pomona Ripon Tracy Hanford Henrietta

Well situated for energy storage

Well situated for solar

Increased demand for flexible capacity (peaking and base load) due to significant renewable generation

Increased resource adequacy (RA) pricing

CAISO taking steps to facilitate flexible capacity procurement market structure that will benefit gas-fired generation capacity pricing

Proven brownfield sites well-positioned to take advantage of future opportunities

SCPPA and IID actively looking to replace out-of-state coal imports

Peaking facilities in locations close to high load regions should command premium pricing

California - Resource Adequacy

Load Serving Entities (LSEs) are required by the California Public Utilities Commission (CPUC) to procure resource adequacy (RA) to ensure adequate capacity is available on the California grid.

• Local RA – primarily load centers

• System RA – rest of the system

• Flexible RA – covers a 3 hour ramp

• LSEs file year ahead load forecasts and receive their RA obligations from the CPUC.

• Annual filing – LSEs must procure 100% of Local RA, 90% of Flexible RA and 90% of System RA (for the 5 summer months) by October 31st.

• Additional windows for procurement for System RA close 45 days and 10 days prior to the compliance month (to account for revised load forecasts).

• Current Local RA prices average $2-3/kW-month. System RA prices are lower at $1-$1.50/kW-month.

• RA prices are expected to increase as California moves to 50% RPS.

Humboldt0.4%

North Coast/North Bay

3% Sierra4%

GreaterBay Area

21%

Stockton2%

GreaterFresno

7%

San Diego11%

Las AngelesBasin41%

Kern1%

Big CreekVentura

10%

Pomona

Henrietta

Hanford

Tracy

Ripon

Blythe

Pomona Energy Storage Facility Quick Facts

10 year Energy Storage Agreement (ESA) with Southern California Edison (SCE) for 20 MW energy storage at Pomona facility.

• 20 MW of resource adequacy capacity for four hour period, equivalent of 80 MWh of energy discharging capacity.

• Largest battery storage facility in North America.

• The industry’s fastest project completion record - deployed 20 MW in less than four months.

• In-Service: December 31, 2016.

• Estimated cost: Approximately US$40-$45 million.

• Energy storage is complementary to gas-fired capacity at AltaGas’ Pomona Facility.

• Delivered on-time and on-budget.

Pomona Energy Storage Facility

100% safety record

12,240 batteries installed10 parker inverters1020 battery racks 55,000 man hours

10,800 square feet

The industry’s fastest project completion record deployed 20MW in less than 4 months.

Setting the standard for delivering safe energy storage capacity.

Greensmith software controls / Samsung batteries / Parker Hannifin inverters / ABB transformers / ARB general contractor

Credit: AltaGas Ltd.