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2008- 023 (3) Groundwater and Environmental Protection (a) All applicable state and federal groundwater and groundwater impact regulations shall be satisfied. (b) Excavation activity shall occur only above the confining layer. (c) All existing or proposed on-site wells that penetrate the confining layer shall either be grouted and plugged to accordance with SJRWMD standards or brought up to current SJRWMD standards for such wells. Such wells shall be properly plugged or upgraded and properly monumented and flagged prior to issuance of the initial mining permit. (d) The following setbacks shall be maintained from excavation areas below the wet season groundwater level (excludes temporary re -charge ditches and similar temporary excavations used for water re -charge): 1. 30 feet to any plugged or unplugged well that penetrates the confining layer, 2. 100 feet to preserved on-site jut isdictional wetlands or native uplands, 3. 300 feet to known off-site jurisdictional wetlands, native uplands, and improved pasture lands, 4. 1,000 feet to the nearest existing or proposed city or county public water supply well that uses the surficial aquifer (the aquifer that lies above the confining layer) as a source of potable water. (e) The mining operation shall not adversely affect the hydro -period of preserved jurisdictional wetlands on site or known off-site jurisdictional wetlands. The project site plan, stormwater management plans, and pollution prevention plans shall demonstrate how the hydro -period of on-site and known off-site jurisdictional wetlands will be maintained to the satisfaction of SJRWMD. (f) Extraction and on-site processing techniques that involve blasting or use of active chemical agents are prohibited. This prohibition is based on a finding that such techniques are not necessary to extract or process recoverable materials known to exist within Indian River County, and is intended to avoid potential adverse groundwater impacts as well as noise and vibration nuisances. (g) Any contaminated soils identified on site shall be handled in accordance with applicable state and federal standards, as directed by the Department of Health (DOH). (h) Project site plans and permit plans shall incorporate all appropriate recommendations and best management practices (bmps) contained or identified within the project hydrology report. The county is authorized to engage professional services to review project hydrology reports and charge applicants the cost of such services. Double Underline Text: Non Workshop Changes Bold Underline: Additions to Ordinance Str+ke_ gh: Deleted Text from Existing Ordinance F:ACommunity Development \ Users \CurDevAORDINANCE \2008\2008- 934 Excavation(atier l2-19-08).RTF 11