The Maher Ordinance is a San Francisco Department of Public Health (SFDPH) stipulation that covers areas with a current or historical industrial use or zoning; areas within 100 feet of current or historical underground tanks; and filled former bay, marsh or creek areas. In addition, areas within 150 feet of a current or former elevated highway. The Maher Ordinance requires a subsurface investigation and soil analysis for a specified list of inorganic and organic chemicals at construction sites where at least 50 cubic yards of soil are disturbed; construction on the bay side of the historic high-tide line; there is reason to believe that hazardous waste may be present.
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