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Health Advisory Lifted for Pittsburg and Antioch

Last updated: 5:39 a.m. Friday, March 27, 2015

The health advisory for Pittsburg and Antioch has been lifted. The advisory was issued for people with respiratory sensitivities this morning after a chemical release at Dow Chemical in Pittsburg. Contra Costa HazMat staff are investigating the incident. More information will be posted as it becomes available.

RMP - Pacific Gas & Electric (PG&E) Gateway Station

3225 Wilbur Avenue, Antioch, California


Pacific Gas and Electric (PG&E) operates the Gateway Generating Station, a nominal 530-megawat (MW) natural gas-fired combined cycle electric power generating facility. The Gateway Generating Station is located on Wilbur Avenue, one mile northeast of the City of Antioch, in Contra Costa County, California, on the southern shore of the San Joaquin River. Highway 4 and the Antioch Bridge are just east of the site. The river borders the north side, while a recreational marina, open space and additional industrial land uses occur east of the site. The Gateway Generating Station uses aqueous ammonia in its selective catalytic reduction (SCR) system to reduce the emissions of nitrogen oxides (NOx) to the atmosphere and anhydrous ammonia as a refrigerant medium to chill cooling water that is used to reduce the inlet air temperature entering the combustion turbine.

For additional information regarding this facility's operations and most recent audit results, please view the Audit Summary English | Spanish.

Regulated Substances Subject to CalARP/Federal RMP/ISO:

Regulated Substance Program Level CalARP Regulated Federal RMP Regulated ISO Regulated
Anhydrous Ammonia 3 yes yes no
Aqueous Ammonia 2 yes yes no