4-9-8: MINIMUM STANDARDS FOR CONSTRUCTION ACTIVITIES; DEMOLITION ACTIVITIES; MINING, BLASTING AND AGGREGATE MATERIALS OPERATIONS:
A. Scope:
1. The following requirements shall apply to:
a. Any construction activity involving in aggregate one or more acres of disturbed area;
b. Any commercial project;
c. Any industrial project;
d. Any demolition project; and
e. All mining, blasting and aggregate materials operations.
2. This section shall not apply to:
a. Construction or demolition activities occurring entirely within an enclosed structure from which no visible airborne particulate matter escapes;
b. Landscaping by an individual at his place of residence;
c. Emergency maintenance activities conducted by government agencies on publicly maintained roads, road shoulder, right-of-way and public flood control facilities; and
d. Dust palliative application projects conducted solely for the purpose of compliance with section 4-9-11 of this chapter, wherein no grade elevation is changed, no cut and fill operations occur, and no soil or rock is imported or exported, except for the importing of gravel or rock for use as a dust palliative.
B. Basic Requirements: Both the owner and the operator are responsible to ensure that the following are complied with:
1. File a complete dust control plan with the city of St. George development services department before initiating activities on any site;
a. The plan shall specify and describe the best practical methods to be used to control the generation of fugitive dust;
2. Obtain a dust control permit, issued by the city of St. George which shall be valid for one year unless revoked earlier;
3. Implement the best practical methods as outlined in the dust control plan;
4. Install a sign that conforms to the signage requirement of this chapter;
5. Compile and retain a written record of self-inspection made each day when soil disturbing work is conducted as required by this chapter; and
6. Implement long term stabilization within ten (10) days of the cessation of active operations, if construction is complete, or a site or part thereof becomes inactive for a period of thirty (30) days or longer. An operator or owner shall implement at least one of the following long term stabilization techniques for any disturbed surface area where activities are not scheduled to occur for at least thirty (30) days:
a. Revegetation that results in seventy five percent (75%) ground coverage to be maintained until the city determines vegetation is established; or
b. Use of watering or chemical stabilizers to establish a stabilized surface with physical access restriction surrounding the areas;
7. A person who has successfully completed a city of St. George environmental management dust control class must be on site at all times when construction activity is in progress.
C. Certification: The following individuals shall be required to have successfully completed a city of St. George environmental management dust control class:
1. Any individual responsible for preparing a dust control plan;
2. The construction site superintendent(s), foreman and other designated on-site representatives;
3. All individuals required to attend and successfully complete the environmental management dust control class shall do so at least once every three (3) years.
D. Mining, Blasting And Aggregate Materials Operations:
1. Hours for detonation of explosives shall be limited to between eight o’clock (8:00) A.M. and five o’clock (5:00) P.M. Monday through Friday and shall not proceed beyond these hours or on Saturday, Sunday, New Year’s Day, Memorial Day, Fourth of July, Labor Day, Thanksgiving Day, or Christmas Day without prior approval from the city.
2. Blasting shall be limited and conducted only during favorable weather conditions. No blasting shall be allowed when the national weather service forecasts sustained winds above thirty (30) miles per hour (mph).
E. Vehicles Exiting Site:
1. Control Measures: Any operator of a project with a disturbed surface area of one or more acres or of any project that involves the import or export of at least one hundred (100) cubic yards of bulk material per day shall install and maintain at least one of the following control measures at the intersection of each site entrance and any paved road open to through traffic with all vehicles exiting the site routed over the selected device(s):
a. Pad consisting of minimum three inch (3") rock maintained in a clean condition to a depth of at least eight inches (8") and extending at least thirty feet (30') wide and at least fifty feet (50') long;
b. Paved surface extending at least one hundred feet (100') and at least twenty feet (20') wide;
c. Wheel shaker/wheel spreading device consisting of raised dividers (rails, pipes, or grates) at least three inches (3") tall and at least six inches (6") apart and twenty feet (20') wide; or
d. A wheel washing system.
2. Track Out Material: Any material outside a truck or other equipment exiting a construction activity site shall be cleaned from the truck or equipment. Any material which is tracked onto a paved roadway shall be removed as quickly as is safely possible and if such track out materials extend from any project at any access point, the materials shall be removed promptly.
3. Removal Of Accumulated Materials: Dirt and dust materials that have accumulated in curb and gutter areas as well as sidewalk locations as a result of track out or development activities shall be removed promptly.
4. Excavation Permit Conditions: In order to mitigate the impact of construction activities and related activities on public roads and highways, the conditions of an excavation permit may include a requirement to install road base, chip seal or asphalt to access roads for a prescribed distance before entering a public road. All access roads shall be kept clean to prevent dirt and debris track out onto public roads. (Ord. 2007-12-005, 12-6-2007)