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The blocked areas an the accompanying plat are the limits of the provisionally suitable soils as evaluated by the Orange County Fie <br />Department <br />Tt should be noted that all lots having a conventional drain field with pump are reviewed at a minimum of every five years by the he <br />deparmzent as required by 1SA NCAC 18A .1961 (Maintenance of Sewage Systems). <br />Conventional Systems aze placed in azeas with 36 inches or mote of provisionally suitable characteristics. <br />Shallow Trenc$ Conventional Systems aza placed in, azeas with 30 inches or more of provisionally suitable characteristics. <br />Ultra Shallow Trench Conventional Systems axe placed in areas with 24 iaches~ or more of provisionally suitable chazacteristics anc <br />inch soil cap is placed over the trcnchcs. . <br />