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(23) Irrigation zone - -A subdivision of an irrigation system with a matched precipitation rate
<br />based on plant material type (such as turf, shrubs, or trees), microclimate factors (such as
<br />sun/shade ratio), topographic features (such as slope) and soil conditions (such as sand, loam,
<br />clay, or combination) or for hydrological control.
<br />(24) Irrigator - -A person who sells, designs, offers consultations regarding, installs, maintains,
<br />alters, repairs, services or supervises the installation of an irrigation system, including the
<br />connection of such system to a private or public, raw or potable water supply system or any
<br />water supply, and who is required to be licensed under Title 30, Texas Administrative Code,
<br />Chapter 30.
<br />(25) Irrigator -in- Charge - -The irrigator responsible for all irrigation work performed by an
<br />exempt business owner, including, but not limited to obtaining permits, developing design plans,
<br />supervising the work of other irrigators or irrigation technicians, and installing, selling,
<br />maintaining, altering, repairing, or servicing a landscape irrigation system.
<br />(26) Landscape irrigation - -The science of applying the necessary amount of water to promote
<br />or sustain healthy growth of plant material or turf.
<br />(27) License - -An occupational license that is issued by the Texas Commission on Environmental
<br />Quality under Title 30, Texas Administrative Code, Chapter 30 to an individual that authorizes
<br />the individual to engage in an activity that is covered by Title 30, Texas Administrative Code,
<br />Chapter 30.
<br />(28) Mainline - -A pipe within an irrigation system that delivers water from the water source to
<br />the individual zone valves.
<br />(29) Maintenance checklist - -A document made available to the irrigation system's owner or
<br />owner's representative that contains information regarding the operation and maintenance of the
<br />irrigation system, including, but not limited to: checking and repairing the irrigation system,
<br />setting the automatic controller, checking the rain or moisture sensor, cleaning filters, pruning
<br />grass and plants away from irrigation emitters, using and operating the irrigation system, the
<br />precipitation rates of each irrigation zone within the system, any water conservation measures
<br />currently in effect from the water purveyor, the name of the water purveyor, a suggested seasonal
<br />or monthly watering schedule based on current evapotranspiration data for the geographic
<br />region, and the minimum water requirements for the plant material in each zone based on the soil
<br />type and plant material where the system is installed.
<br />(30) Major maintenance, alteration, repair, or service - -Any activity that involves opening to
<br />the atmosphere the irrigation main line at any point prior to the discharge side of any irrigation
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