A popular restaurant in Stinson Beach is in the process of updating its septic system after failing an inspection last summer. The Sand Dollar Restaurant was cited in July after an inspector found a chamber that holds a diversion valve for two leach fields had flooded with sludge and a line leading to the septic tank had been plugged with grease. The Stinson Beach County Water District conducted the inspection and held an abatement hearing on March 17 to request project plans and a timeline from the restaurant. Ed Schmidt, the district’s general manager, said he expects to have received all the information by the district’s board meeting in April. At the hearing last Saturday, Sam Temer, a co-owner of the 43-year-old restaurant, informed the board that he has installed an alarm system to alert staff of high levels in the septic tank. (“It sounds like a cricket on steroids,” he said.) Across the nearly two decades that Mr. Temer been at the Sand Dollar, he said he’s seen visitation soar. “The popularity of Stinson Beach in the 18 years that I’ve been there has easily doubled,” he said. “The number of people I see coming from the Central Valley is astounding.”