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2F <br />The blocked areas on the accotupanyin; plat are the limits of the provisionally suitable soils as evaluated by the Orange County lies <br />Department <br />It should be noted that all Iota having a conventional drain field with pump arc reviewed at a minimum of every five yeazs by the he: <br />department as required by 1SA NCAC 18A .1961 (D~Iaintenance of Sewage Systems), <br />Conventional Systems arc placed in areas with 36 inches or more of provisionally suitable characteristics. <br />Shallow Trench Conventional Systems aze placed in areas with 30 inches or more of provisionally suitable characteristics. <br />Ultra Shallow Trench Conventional Systems are placed in areas with 24 inches or more of provisionally suitable characteristics and <br />inch soil cap is placed oven the trenches. <br /> <br />