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Sec. 6-4 Groundwater recharge area protection.(a) Protected groundwater recharge areas; defined.(1) Significant recharge area.Significant recharge areas are defined by the Georgia Department of Natural Resources (DNR) using criteria developed by them, and have been mapped on DNR’s Hydrologic Atlas 18 (1989 edition), or as may be amended by DNR from time to time.(2) Pollution susceptibility category.Categories of relative vulnerability of an aquifer to pollution (higher, average, lower) are defined by DNR using criteria developed by them, and have been mapped on DNR’s Hydrologic Atlas 20 along with the most significant recharge areas. All significant recharge areas in Crisp County are categorized as having a higher susceptibility to pollution.(3) Throughout Crisp County, the Board of Health has determined that all areas of the county fall under the higher susceptibility category.(b) Protected groundwater recharge areas; restrictions.Within Crisp County, the following shall apply:(1) All new agricultural waste impoundment sites must be lined. The liner must be constructed of compacted clay having a thickness of 1 foot and a vertical hydraulic conductivity of less than 5 x 10-7 cm/sec or other criteria established by the U.S. Soil Conservation Service.(2) A new home served by a septic tank/drain field system must have a lot that is at least 150% of the minimum lot size required by Table MT-1 of the Department of Human Resource’s Manual for On-Site Sewage Management Systems.(3) A new manufactured home park served by a septic tank/drain field system must have a lot or space that is at least 150% of the minimum lot or space size required by Table MT-2 of the Department of Human Resource’s Manual for On-Site Sewage Management Systems.4-24 Manufactored Home Park.pdf