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09/05/2006 07:56 9196448002 OR. CTY. PLANNING PAGE 03 <br />1~IOTES: <br />The design flow is based upon the nttmber of bedrooms applied for by the property owner or developer.. <br />The design flow for a bedroom is 120 gallons/day (gpd). (e.g. 600 gpd = 5 bedrooms) <br />Proposed house locations are provided by the property ownez or developer as required by 15A NCAC <br />18A .1900 - .,1969 (The Laws and Rules for Sewage Treatment and Disposal Systems),. <br />The design flow, type system, and pump requirement aze strbject to change based upon the application <br />and site plan or plat submitted for the Wastewater Cottstruction Authorization. <br />The blocked areas on the accompanying plat are the limits of the provisionally suitable soils as evaluated <br />by the Orange County Health Department. <br />It should be noted that all lots having aconventional-type drain field with pump are reviewed at a <br />minimum of every five years by the health department as required by 15A NCAC 18A .1961 <br />(Maintenance of Sewage Systems), <br />Conventional Trench Systems are placed in areas with 36" inches or more of provisionally <br />suitable soil/site chazacteristics. <br />Shallow Trench Conventional Systems aze placed in areas with 30 inches or more of provisionally <br />suitable soil/site characteristics. <br />Ultra Shallow Trench Conventional Systems are placed in aeeas with 24 inches or mare of <br />provisionally suitable soiUsite chazaeteristics and a 6-10" sail cap is placed over the trenches. <br />Innovative Trench Systems can be used in areas with 24-36 "of provisionally suitable soiUsite <br />chazacteristics.. Innovative trench systems are composed of polystyrene aggregate or plastic <br />chambers in lieu of gravel and pipe. These systems are granted a 25% reduction in linear footage <br />as compared to gravel trenches. <br />Ultra Shallow hmovative Trench Systems are placed in areas with 24 inches or more of <br />provisionally suitable soil/site characteristics and a 6-10" soil cap is placed over the itn~ovative <br />trench product. <br />The zequirement for a pump is based upon the elevation of the proposed house as compazed to the <br />elevation of the draiztfleld azea. <br />comnactints activities. It is the responsibility of the property owner or developer to maintain the <br />integrity of the septic aeeas prior to system construction and installation. No parking, cutting or <br />filling shall be allowed in or around the drain field aeeas. <br />Drainage ways and easements should be utilized to convey storm water run-off to the storm water <br />retention areas. These conveyances should not be located through designated septic drain field <br />aeeas <br />