This chapter does not affect or prevent:
(1) The practice of architecture, land surveying, engineering, geology, or any recognized profession by persons not licensed as landscape architects;
(2) Drafters, clerks, project managers, superintendents, and other employees of landscape architects from acting under the instructions, control, or supervision of their employers;
(3) The construction, alteration, or supervision of sites by contractors or superintendents employed by contractors or the preparation of shop drawings in connection therewith;
(4) Owners or contractors under chapter
18.27 RCW from engaging persons who are not landscape architects to observe and supervise site construction of a project;
(5) Qualified professional biologists as referenced in chapter
36.70 RCW from providing services for natural site areas that also fall within the definition of the practice of landscape architecture without a violation of this chapter;
(6) The preparation of construction documents including planting plans, landscape materials, or other horticulture-related elements;
(7) Individuals from making plans, drawings, or specifications for any property owned by them and for their own personal use;
(8) The design of irrigation systems; and
(9) Landscape design on residential properties.