§ 26-252. General requirements.

(a)

Construction site operators shall implement appropriate erosion prevention and sediment control best management practices.

(b)

The design, installation, maintenance and inspection of erosion prevention and sediment control design standards and best management practices shall be performed in accordance with the state general NPDES permit for discharges of stormwater associated with construction activities, the TDEC erosion and sediment control handbook, and the county stormwater management manual, as amended. Where the provisions of this section, the county stormwater management manual, as amended, or another regulation conflict or overlap, that regulation which is more restrictive or imposes higher standards or requirements shall prevail.

(c)

Additional requirements for discharges into impaired or exceptional Tennessee waters that are defined in the state general NPDES permit for discharges of stormwater associated with construction activities shall be implemented for all priority construction activities located in the county, as defined by this article.

(d)

The director may require more stringent standards or best management practices than those required by the state general NPDES permit for discharges of stormwater associated with construction activities for priority construction activities or where deemed necessary.

(e)

Discharges from sediment basins and traps must be through a pipe or a conveyance lined with rip-rap or other stabilized spillway so that the discharge does not cause erosion.

(f)

Sediment laden water to be pumped from excavation and work areas must be held in settling basins or filtered prior to its discharge into surface waters. Water must be discharged onto a stabilized outlet point so that the discharge does not cause erosion and sedimentation.

(g)

For installation of any waste disposal systems on site, or sanitary sewer or septic system, the plan shall provide for the necessary sediment controls. Owners or operators must also comply with applicable state and/or local waste disposal, sanitary sewer or septic system regulations for such systems, to the extent that these are located within the permitted area.

(h)

Construction site operators shall control other construction related wastes, such as discarded building materials, concrete truck washout, chemicals, litter, and sanitary waste at the construction site that may cause adverse impacts to water quality in conformance with the State of Tennessee General NPDES Permit for Discharges of Stormwater Associated with Construction Activities.

(i)

Construction materials buried onsite shall meet section 4.8 of the county zoning ordinance.

(j)

All discharges from a site shall leave the property at non-erosive velocities and volumes.

(k)

The portion of the performance bond pertaining to erosion prevention and sediment control shall be released only after final stabilization has been achieved in conformance with the State of Tennessee General NPDES Permit for Discharges of Stormwater Associated with Construction Activities.

(l)

The director shall have the authority to impose more stringent criteria to achieve final stabilization than required by the State of Tennessee General NPDES Permit for Discharges of Stormwater Associated with Construction Activities for release of the erosion prevention and sediment control portion of the performance bond if site is a priority construction activity, has an elevated potential for erosion or off-site damages, or has caused past damages off-site due to sediment discharges.

(m)

Riparian buffer zones shall be preserved in conformance with the State of Tennessee General NPDES Permit for Discharges of Stormwater Associated with Construction Activities.

(Ord. No. O-07-12-101, § 2(§ 7.2), 1-28-08; Ord. No. O-12-11-102, § 5, 12-17-12)