An owner of a collection system shall maintain collection system records for the life of the project. An owner shall make the following records available to the executive director in accordance with §217.18(d) of this title (relating to Provisions that Apply to All Sections in this Chapter):(1) a copy of the final engineering report, construction drawings, and specifications for each project, as required by §217.10 and §217.13 of this title (relating to Final Engineering Report; and Final Construction Drawings and Specifications);(2) a copy of all documents required by this chapter, including correspondence with the executive director regarding approval of plans and specifications for each project; and(3) a copy of all manufacturer's recommendations relied on in the design of each project.