A winterization certification shall be submitted no later than September 15th for all projects where any construction will occur between October 1st and April 30th. Construction that will occur solely in the summer months, between May 1st and September 30th will not be required to submit a winterization certification. The winterization certification shall consist of a written statement or descriptive plan sheet from the owner certifying that the project under construction is prepared for an event which will stop construction, such as rain or snow, that all ESC plan best management practices are in place and operating correctly, that housekeeping practices are maintained and that the site can be left or abandoned safely for an extended period of time during the rainy season without causing any erosion and sediment control problems. If a winterization certification is required and has not been submitted and approved prior to September 16th, the grading approval will be suspended until a winterization certification is submitted and approval obtained. Refer to the Manual of Standards, Chapter 4, Section 5, for additional information regarding winterization certification. (Prior code § 9.33.1706)