A 160-ton tunnel-boring machine named Lisa will begin carving an underground path Monday for a new sewage pipe about 40 feet below Visitacion Valley.Named after its owner’s wife, Lisa will cut a 12-foot-wide tunnel designed to relieve neighbors of persistent sewage backups during rainy seasons. The passageway will stretch about 4,000 feet from Bayshore Boulevard to Harney Way, near Candlestick Park.
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A food safety activist’s warning that sewage-based compost given away by San Francisco contains toxic material received an indifferent response Tuesday from utilities officials, who plan to hold a hearing on the matter.
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An estimated 40,000 gallons of diluted, untreated sewage flowed out of a ruptured sewer line under Liberty Ship Way before the leak was fixed, according to Sausalito-Marin City Sanitation District general manager Bob Simmons.
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URL: http://www.sfexaminer.com/taxonomy/term/27076
