Flexible Renewable Storage Potential

32 RNG STRATEGY & NEAR-TERM OPPORTUNITIES Dedicated RNG Team whose mission is to secure renewable supply for NW Natural customers and renewable resources in an effort to decarbonize the company's system. RNG Procurement Strategy includes prioritizing contracts/investments that: • • • Can deliver RNG at the lowest incremental cost to our customers Offer the largest possible volume of RNG over the next 5-10 years to help us meet SB 98 volumetric targets Include development or feedstock partners that have follow-on RNG opportunities RNG Interconnections - working to interconnect two projects onto our system in 2021 and a third project by early 2022. Interconnections are intended to serve the heavy-duty vehicle transportation market Hydrogen Facility - working on the approval application for an 1MW electrolysis project (5% blending immediately and up to 10% in the future) expected to be presented to the regulators in early 2022 Hydrogen Testing - testing 5% hydrogen blend and ramping up to 20%, if learnings allow, at NW Natural's state-of-the-art training facility. Testing is scheduled to start in early 2022 and finish in 2023 NW NaturalⓇ

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