17.31.190 Erosion and sediment control plan.
A. A final erosion and sediment control plan, prepared by a registered civil engineer, shall be submitted unless all of the following conditions are met and a building permit is not required:
1. The site is less than one acre in area and there is less than one thousand cubic yards of excavation or fill;
2. The provisions for runoff control are in accordance with the provisions of this chapter and are acceptable to the director of public works;
3. The average slope of the site before grading is less than fifteen percent;
4. The site is within zones C or D as shown on the U.S. Department of Housing and Urban Development Flood Insurance Rate Maps;
5. The proposed grading does not pose a threat to adjacent or downstream properties as determined by the director of public works;
6. The proposed grading is deemed to have no significant environmental impact as determined pursuant to the provisions of the California Environmental Quality Act, as amended, and the regulations promulgated by the California Resources Agency and the Petaluma city council to implement the Act.
B. The final erosion and sediment control plan must effectively minimize soil erosion and sedimentation from the completed project site and must also provide for the control of runoff from the site.
C. The final and interim erosion and sediment control plans shall contain the following information:
1. A description and delineation of the vegetative measure to be taken to minimize erosion and sedimentation;
2. A description and delineation of the temporary and permanent measures to be taken to protect manufactured or disturbed slopes from erosion by mechanical means; such as with mulches; diversion dikes; etc.;
3. The delineation of the drainage control measures to be taken;
4. The extent and manner of the cutting of trees and the clearing of vegetation; the disposal of same; and the measures to be taken for the protection of undisturbed trees and vegetation;
5. The methods to be used for the disposal of excess materials;
6. The methods to be used for the control of dust;
7. A description and delineation of the temporary and permanent measures to be taken to retain sediment on the site;
8. A description of the measures to be taken to maintain the devices shown on the plan during grading operations and construction on the site;
9. The extent of disturbed ground that will exist; what streets will be paved; and what drainage devices will be installed prior to the start of each rainy season;
10. Any other information required by the director of public works.
D. The Erosion and Sediment Control Handbook should be used as a guide as to what measures should be taken for any particular set of circumstances.
E. An interim erosion and sediment control plan is required prior to each rainy season during construction for a project for which a final erosion and sediment control plan is required by this chapter. The plan must be submitted in a timely manner to allow the city to review and approve the plan prior to September 1st. The measures delineated and described in the plan must be operational prior to October 1st.
F. An estimate of the cost of accomplishing the work described and delineated on the final and interim erosion and sediment control plans and the permit must be submitted in a form which is acceptable to the director of public works.
(Ord. 1576 NCS §1 (part), 1984.)