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DocuSign Envelope ID:81E05E8E-EED7-43D3-8B8A-08110E72140A <br /> corresponding minimum usable soil depth required and any trench length reduction if <br /> allowed noted in parentheses: conventional (30"), shallow conventional systems (24" <br /> with soil cap), chamber systems (24"with soil cap and 25% drain field reduction), <br /> polystyrene systems (24"with soil cap and 25% drain field reduction), vertical panel <br /> block systems (requires at least 34" of usable soil and allows 50% drain field reduction), <br /> horizontal panel block systems (requires 26" of usable soil depth and allows 50% drain <br /> field reduction), large diameter pipe (24"), low pressure pipe (24"), low profile chamber <br /> (20"), low pressure fill (18") and drip irrigation(18"). A pump can be used to deliver <br /> effluent to the usable soil area if gravity flow cannot be achieved. Also, a pump is <br /> required on any system with over 750' of drain field. The percent reduction means the <br /> amount of drain field trench length reduction for that product as compared to <br /> conventional trenches. Certain models of chamber systems and polystyrene bundle <br /> systems are considered accepted trench products. Accepted trench products can be <br /> substituted in lieu of conventional gravel trenches. <br /> Septic System Setbacks: <br /> The following setbacks must be taken into consideration in identifying a septic system <br /> area for flows less than 3000 gallons per day. Verify if any Orange County additional <br /> setbacks will apply. <br /> Private Water Supply Source: wells or springs: 100, <br /> Private Water Supply Source with site-planning considerations: 50' <br /> Public Water Supply Source: 100, <br /> WS-1 Streams: 100, <br /> SA Coastal waters: 100, <br /> Other coastal waters: 50' <br /> Other streams, canals, marshes or surface waters: 50' <br /> Class I and 11 reservoirs: 100, <br /> Permanent Storm Water retention ponds: 50' <br /> Building foundation: 5' <br /> Basement: 15' <br /> Property line: 10, <br /> Embankments or vertical cuts>2' deep: 15' <br /> Any water line: 10, <br /> Drains: <br /> Interceptor, Foundation, and storm <br /> Upslope: 10, <br /> Side slope: 15' <br /> Down slope: 25' <br /> Groundwater lowering ditches: 25' <br /> Swimming pool: 15' <br /> Any other nitrification field: 20' <br /> (from 15A NCAC 18A 1950 Location of Sanitary Sewage Systems) <br /> Project# 320059 <br />