Former Potrero Power Plant Site Remediation WELCOME PG&E Community Open House
Former Potrero Power Plant Site Remediation Former Potrero Power Plant Site Header 1 This is paragraph style 1 Photo taken: March 2012.
Former Potrero Power Plant Site Remediation What is a Manufactured Gas Plant (MGP)? MANUFACTURING GAS HOLDER PROCESS COAL OR OIL GAS RESIDENCES STREET LAMPS BUSINESSES
Former Potrero Power Plant Site Remediation Goals Fulfill our commitment to address impacts from historic MGP and power plant operations. Protect human health and the environment. Work collaboratively with stakeholders and the community. Protect the safety of the community and site workers. Allow for the productive re-use of the site.
Former Potrero Power Plant Site Remediation Project Site Hoe Down Yard (Cleanup Complete) Port Property OFFSHORE T . S (Cleanup Plan Approved / In Design) D N 2 2 SEDIMENT AREA Switchyard/ (Cleanup Approach Approved Construction Yard Tank Farm / Cleanup Plan Pending) Northeast Area (Cleanup Complete) (Investigation Pending (Cleanup Plan Tank Removal by NRG) Approved / In Design) ILLINOIS ST. 3RD ST. TENNESSEE ST. Station A (NRG Owned) Former Power (Anticipated 2016 Closure / Completion) Generation Facility Station A (Investigation Completed) (PG&E Owned) (Anticipated 2016 Closure / Completion) . T S D R 3 2 Port of San Francisco Property Impacted PG&E-Owned Properties NRG Potrero, LLC Owned Properties by Historical MGP Activities Approximate boundaries shown. Map not to scale.
Former Potrero Power Plant Site Remediation Cleanup Timeline 2016 2017 2018 2019 Cleanup Plan Cleanup Plan Development Public Comment Period Completion OFFSHORE SEDIMENT Contracting and AREA Design / Permitting Construction Construction and Field Work Regulatory Closure Permitting NORTHEAST Contracting and AREA Design/Permitting Construction Construction and Field Work Regulatory Closure (INCLUDING Permitting PORT PROPERTY) NRG Potrero, LLC Owned Properties FMR POWER GENERATION Investigation and Risk Assessment Public Review and Regulatory Closure FACILITY (UNIT 3) TANK Timeline Under Development FARM STATION A Regulatory Closure STATION A Regulatory Closure PG&E Owned Properties HOE DOWN Cleanup Completed in 2012. YARD Cleanup Completed in 2012. SWITCHYARD
Former Potrero Power Plant Site Remediation Offshore Sediment Area N 1 2 ■ Feasibility Study (FS) of Cleanup Approach approved in 2015 OFFSHORE Port SEDIMENT Property AREA ■ Approved Cleanup Approach Northeast Tank Farm Area addresses different conditions: 3 Nearshore Area 1 Station A Dredging of impacted sediments Former Power Generation and capping with natural materials Facility Northern Transition Area 2 In-place treatment with activated carbon Southern Transition Area 3 Port of San Francisco Shoreline and NRG Potrero, Transition Areas Property Impacted Nearshore Areas LLC Owned Where Impacts Monitored natural recovery by Historical MGP Where Impacts Properties Will be Addressed Activities Will be Addressed ■ Next Steps • Cleanup Plan review by Water Board: Fall 2016 • Public Comment Period /Public Meeting: Late-2016 View of Offshore Sediment Area
Former Potrero Power Plant Site Remediation Northeast Area Cleanup ■ Cleanup Plan approval: Summer 2016 ■ Cleanup Plan: 1 • A portion of MGP residues around Port 1 Property Pier 70 structures excavated • A portion of MGP residues on Power Plant Property 2 2 treated in-place using cement mix (solidification) Durable cover installed/maintained 3 Tank Farm Northeast ■ Active cleanup: 2017/2018 Area 2 ■ Community Meeting before work starts 3 Station A Former Power Generation Facility Port of San Francisco NRG Potrero, Property Impacted Excavation Solidification LLC Owned by Historical MGP Area Area Properties Activities
Former Potrero Power Plant Site Remediation Former Power Generation Facility and Tank Farm Former Power Generation Facility (NRG owned) • Includes the Unit 3 power plant and surrounding areas • Soil and groundwater investigations complete • PG&E, NRG and Water Board working to evaluate results and plan for closure Tank Farm (NRG owned) • Includes three large above-ground fuel tanks formerly used to store fuel oil • Investigation pending tank removal by NRG
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