The pressure surge was caused by a malfunction in the pressure-reducing valve, she said, and the company isolated it from the system. Ms. Kingman said the company is "investigating the problem to ensure we can prevent it from happening again in the future."
Even though the leaks were spread across much of the district, fewer than 140 customers had their water turned off during the event, she said. At Everest, a charter high school at 455 Fifth Ave. in North Fair Oaks, the water district provided bottled water and portable toilets so the school could remain open, Ms. Kingman said.
Having crews from neighboring districts "was vital to this emergency being resolved as quickly as it was," she said. "We had crews from our Salinas, Los Altos, Livermore, Stockton, and Bayshore districts, who all came to help our local Bear Gulch and contractor teams repair the leaks, provide relief to employees who had been on duty, and support our Emergency Operations Center."
CalWater, she pointed out, tries to warn customers when service will be interrupted and will deliver bottled water to affected customers or reimburse them for the expense of purchased water.
Monday's leaks were near the following intersections: Euclid and Stockbridge avenues in Atherton; Fifth Avenue and Middlefield Road in North Fair Oaks; First Street and Williams Avenue in North Fair Oaks; Roble Avenue and University Drive in Menlo Park; Felton Drive and Encinal Avenue in Menlo Park; and Fremont Street and Fremont Place in Menlo Park.
Tuesday's leaks were on Fifth Avenue between Park Road and Middlefield Road in North Fair Oaks; on Stockbridge Avenue between Santa Clara Avenue and Hillary Lane in Atherton; and on University Drive between Partridge and Cambridge avenues in Menlo Park.
"We sincerely apologize to our affected customers for any inconvenience this has caused to them," Ms. Kingman said.
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