MALIBU, October 5, 2006 - Just whose waste is fouling the most star-studded stretch of the Southern California coast? Los Angeles County officials intend to find out, and if the evidence leads back to the toilets of some of Hollywood's rich and famous, the sewage could really hit the fan. "This is going to get messy," predicts Mark Pestrella, the public works official assigned to the project. Environmentalists and health officials suspect Malibu homeowners' leaky septic tanks are allowing what gets flushed down the toilet to flow down the hills and into the Pacific Ocean. To identify the offenders, authorities...