No land disturbing activity shall be conducted within the city except in such a manner that:
A. Stripping of vegetation, regrading and other development activities shall be conducted so as to minimize erosion. Clearing and grubbing must be held to the minimum necessary for grading and equipment operation. Preconstruction vegetative ground cover shall not be destroyed, removed or disturbed more than ten (10) days prior to grading or earthmoving. Construction must be sequenced to minimize the exposure time of cleared surface area;
B. Upon completion of land disturbing activities, will not leave slopes so that they will erode. Such methods shall include revegetation, sodding, mulching, riprapping or guniting. Regardless of the method used, the objective will be to leave the site as erosion free and maintenance free as practicable;
C. Whenever feasible, natural vegetation shall be retained, protected and supplemented;
D. Permanent or temporary soil stabilization is applied to disturbed areas to the extent feasible within seven (7) days on areas that will remain unfinished for more than fourteen (14) days. Permanent soil stabilization with perennial vegetation shall be applied as soon as practicable after final grading is reached on any portion of the site. Soil stabilization refers to measures that protect soil from the erosive forces of wind, raindrop impact and flowing water, and includes the growing of grass, sod, application of straw, mulch, fabric mats, and the early application of gravel base on areas to be paved;
E. A permanent vegetative cover shall be established on disturbed areas not otherwise permanently stabilized;
F. Sediment in stormwater runoff is trapped by the use of debris basins, sediment basins, silt traps or similar measures, but not hay bales, until the disturbed area is stabilized;
G. Neighboring persons and property are protected from damage or loss resulting from excessive stormwater runoff, soil erosion or deposition upon property or public streets of water transported silt and debris. Adjacent property owners shall be protected from land devaluation due to exposed bare banks;
H. A controlled construction entrance/exit is maintained in a condition that will prevent tracking or flowing of sediment onto the public right of way;
I. Erosion and sediment control measures must be in place and functional before earthmoving operations begin, and must be constructed and maintained throughout the construction period. Temporary measures may be removed at the beginning of the workday, but must be replaced at the end of the workday;
J. Structural controls shall be designed and maintained as required to prevent pollution. All surface water flowing toward the construction area shall, to the extent practicable, be diverted by using berms, channels or sediment traps as necessary. Erosion and sediment control measures shall be designed according to the size and slope of disturbed or drainage areas to detain stormwater runoff and trap sediment. Discharges from sediment basins and traps must be through a pipe or lined channel so that the discharge does not cause erosion. Muddy water to be pumped from excavation and work areas must be held in settling basins or treated by filtration prior to its discharge into surface waters where practicable. Waters must be discharged through a pipe or lined channel so that the discharge does not cause erosion and sedimentation;
K. All control measures are inspected, and repaired as necessary, biweekly in dry periods and within twenty four (24) hours after any precipitation of one-half inch (0.5") or more within a twenty four (24) hour period. During prolonged precipitation, daily inspections and repairing must be performed. The permittee shall maintain records of such inspections and repairs;
L. A specific individual is designated to be responsible for erosion and sediment controls on each site;
M. There shall be no distinctly visible floating scum, oil or other matter contained in the stormwater discharge. The stormwater discharge must not cause an objectionable color contrast in the receiving water. The stormwater discharge must result in no materials in concentrations sufficient to be hazardous or otherwise detrimental to humans, livestock, wildlife, plant life or fish and aquatic life in the receiving stream; and
N. When the land disturbing activity is finished and stable, perennial vegetation has been established on all remaining exposed soil. The permittee shall notify the manager of these facts and submit an NOT of the permit issued under this article. The manager shall then provide a final inspection of the site within twenty (20) days after receipt of such notice and, when advisable, may require additional measures to stabilize the soil and prevent erosion. If such requirements are given by letter, the permittee shall continue to be covered by the provisions of this article until a request for termination of the permit has been accepted by the manager. (Ord. 1076 §1, 2009)