Any person (hereinafter “Applicant”) selling real estate located within the City of Wood Village shall make application on a form furnished by the City at least seven working days prior to the date of sale. The Applicant shall then have a plumber who is registered and licensed by the State of Oregon perform a dye test and a smoke or air test of the sewer drainage system on the property to be sold. The smoke test is to be accomplished using nontoxic, nonstaining smoke, which is forced through the sewer system by the use of air blowers. The plumber shall notify the City at least two working days before the test is made so the City may witness the test. The City shall have the right to approve the test as performed and/or require additional tests be made. The City may also rely on the results of any internal televising of the main sewer completed by the City or its contractor. The plumber shall complete the appropriate portions on the forms and certify that the property has been dye tested, smoke tested or air tested and certify the results of such test. In the event there is no illegal storm or surface water connections and the existing drainage system is sound, the City Building Official or designee shall issue a Document of Certification upon the payment of any established fee. When an illegal storm or surface water connection or malfunctioning drainage system is discovered by the means of the above-mentioned testing, no Document of Certification will be issued until the illegal connections/malfunctioning drainage system are removed/repaired, the system retested and certification of such removal/repair by a licensed plumber is received. The certificate shall be valid for three years and applicable to any real estate transaction within the three-year period.