Sammamish Unified Development Code

Surface Water Management (Title 13) | Environment & Sustainability

discontinuance of any activity leading to the emergency condition.

c. The department of public works shall adopt appropriate standards and procedures for the purposes of this section. 2. Fertilizers on impervious surfaces – Application prohibited – Containment and disposition if released A person may not apply a fertilizer to an impervious surface. Fertilizer released on an impervious surface must be immediately contained and either legally applied to turf or another legal site or returned to the original container or another appropriate container. 3. Consumer education and outreach by department of public works The department of public works shall seek to identify opportunities for grant funding and partnerships to support a consumer education and outreach effort, making use of existing outreach materials produced by other entities to the extent possible. If the State Department of Agriculture produces consumer information on application restrictions of fertilizer containing the plant nutrient phosphorus or on the impacts of phosphorus on the waters of the region, and on recommended best practices for turf fertilizer and other residential landscaping uses, the department of public works shall cooperate in the distribution of the information, including making recommendations for appropriate locations or parties to receive such information, as well as accommodating electronic links on its agency website for any electronic information produced.

G. Fertilizers

1. Fertilizers containing phosphorus – Application – Prohibited – Exceptions – Department of public works to adopt standards and procedures a. Except as provided in subsection 2. of this section, a person may not apply to turf a fertilizer containing the plant nutrient phosphorus.

b. Subsection 1. of this section does not apply when:

i. Soil test results or other certification by a turf specialist performed within the three years previous to the application indicate that the level of available phosphorus in the soil is insufficient to support healthy turf growth, and the test results or certification, and the application rate, are consistent with best practice standards approved by the City department of public works. In developing the best practice standards, the department shall seek input from the Washington State University turfgrass specialists; ii. The property owner or an agent of the property owner is first establishing turf via seed or sod procedures and only during the first calendar year; or iii. Applying turf fertilizer for agricultural or horticultural uses.

Effective | January 1, 2022 Revisions | June 29, 2022

Title 21: Sammamish Development Code | 165

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