(a) Adequate central sanitary sewer systems, including manholes, house laterals and other incidentals, and water supply systems shall be provided by the subdivider, either by the installation of new systems or by connection to existing systems which are deemed adequate to handle the additional demands and volume which will result from the proposed subdivision. Water system extensions must be reviewed and approved by the City Engineer, sanitary sewer system extensions and all sanitary sewer matters must be reviewed and approved by the Medina County Engineer. The subdivider, prior to the submission of the plat for approval by the Planning Commission, must receive the prior written approval for the extension or installation of such central water system and central sanitary sewer system from the City Engineer, the County Sanitary Engineer, and the Ohio Department of Health.
(b) All trenches under paved areas shall be backfilled to the finish grade with gravel or screenings, or thoroughly compacted earth in four-inch layers, loose measurement.