Applicant shall provide, with the application, documentation that he or she shall have notified by mail the owners of utilities and/or easement for utilities on or abutting the site that an application for a grading permit has been submitted to the county. Potentially affected utilities and/or easements for utilities shall be clearly shown and labeled on the site plan accompanying the grading plans. The notice shall state that the utilities must provide comments to Sierra County Planning Department within 30 calendar days of the date the notice is received by the utility. No permit shall be issued until the utility has either approved the application or the 30-day period has expired. This section may be waived by the Planning Director in his or her sole discretion.