When pro­vid­ed, each lot in the sub­di­vi­sion shall be pro­vid­ed at the prop­er­ty line with a con­nec­tion to the pri­vate or pub­lic san­i­tary sew­er sys­tem. The con­struc­tion of the sew­er sys­tem shall con­form to the approved plans and spec­i­fi­ca­tions and all work should be prop­er­ly inspect­ed and approved by the Coun­ty Engi­neer.