Methane spews unchecked from underground storage facility in Los Angeles County

A giant leak at a natural gas storage facility in the Los Angeles area is reversing many of the efforts of California industry, businesses and schools to comply with increasingly stringent emissions rules.

[one_half][box type=”shadow this-matters”]Methane is an especially powerful climate change gas. And residents downwind have had to leave their homes due to the smell from an additive in the gas.[/box][/one_half]

Very large quantities of the potent climate changing gas methane are escaping from a well that is part of an extensive underground gas storage site serving Southern California. More than 300 people have had to leave their homes.

Southern California Gas Co., a subsidiary of San Diego-based Sempra Energy, has 115 gas storage wells at the Aliso Canyon site, near Porter Ranch. It stores gas in the summer and distributes it in the winter out of a sandstone formation that was tapped for oil a century ago.

Dennis Arriola, president and CEO of Southern California Gas, said it will take at least three months to stop the releases, which began more than a month ago.

The gas, under pressure, is gushing at such a rate – more than 44,000 kilograms per hour – that the California Air Resources Board estimated it is increasing the entire state’s methane emissions by 25 percent.

Company officials said the gas flow stems from a damaged 7-inch diameter well casing.

Authorities ranging from the San Diego County Air Pollution Control District to the United Nations are focused on reducing methane because its ability to alter climate during its brief 20-year sojourn in the atmosphere is roughly 70 times stronger than carbon dioxide. The principal sources of methane are agriculture, landfills and the oil and gas industry.

Gas storage projects in California (December 4, 2015)

County	Field	Operator	Active Well Count
Los Angeles	Playa del Rey	So Cal Gas	22
Los Angeles	Aliso Canyon	So Cal Gas	92*
Los Angeles	Honor Rancho	So Cal Gas	32
Santa Barbara	La Goleta Gas	So Cal Gas	17
Madera	Gill Ranch Gas	Gill Ranch Storage LLC	12
Butte	Wild Goose Gas	Wild Goose Storage LLC	17
Colusa	Princeton Gas	Central Valley Gas	8
Contra Costa	Los Medanos Gas	PG&E	20
San Joaquin	Lodi Gas	Lodi Gas Storage	9
San Joaquin	Lodi Gas	Lodi Gas Storage	8
San Joaquin	McDonald Island	PG&E	81
Solano	Kirby Hill Gas	Lodi Gas Storage	9
Solano	Kirby Hills Gas	Lodi Gas Storage	9
Yolo	Pleasant Creek Gas	PG&E	7
			Total: 343

Source: California Public Utilities Commission
* 115,  according to the state Division of Oil, Gas and Geothermal Resources