LOS ANGELES (AP) — Crews will try to stop a leak Saturday from a massive natural gas storage well that has persisted for three weeks outside Los Angeles and alarmed nearby residents concerned for their safety and sickened by the stench. The leak detected Oct. 23 was initially believed to be a minor problem at the well head, though it was later determined there was a hole 480 feet down a pipe that leads to a deep underground reservoir where the company stores natural gas when demand is low, Bohlen said. A crew from Boots & Coots Services, the company that helped extinguish oil well fires in Kuwait during the 1991 Gulf War, removed the icy chunk a week ago that plugged a nearly 3-inch pipe that extends a mile and a half underground where natural gas is stored in the cavities of an old oil well. The storage facility is believed to be the largest of its kind in the West, capable of storing 86 million cubic feet of natural gas, which can supply Southern California for more than a month, Mendoza said. The odor that residents have complained about is from an additive used to make odorless natural gas detectable to prevent disasters from the flammable fossil fuel.