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P <br />~ ~ effective capacity. <br /> <br />~ 8. The transfer of liquid from the first compartment to the second or successive <br /> <br /> compartment shall be made at a liquid depth of at least fourteen (14) inches <br /> below the outlet invert, but not in the sludge zone. <br /> <br /> 9. At least one access no less than twenty (20) inches across shall be provided <br />r in each compartment of a tank. <br />r 10, The opening cover of a septic tank manhole, inspection port, or sampling <br />L access port shall be no deeper than eight (8) inches below the finished grade, <br />'- and made of materials resistant to degradation from moisture or sewer gases. <br />L All access ports must be clearly and permanernly marked at grade, or mapped <br /> <br />Q for easy identification and location. <br /> 11. Conaete septic tanks shall meet all construction code requirements for <br /> reinforoed concrete as specified in the American Concrete Institute Publication <br /> #318 and in the Uniform Building Code. Tanks shall be constructed of <br />< Portland Type II sulfate resistant cement with a minimum compressive <br />r strength of 3,000 p.s.i. at the end of twenty-eight (28) days. It shall be the <br />r manufacturer's responsibility for proper design mix and to insure the tank is <br />` watertight. The walls, floor and cover of the tank shall be at least three and <br />~ one-half (3 '/:) inches thick. Tank cover and lids shall be reinforced to <br /> withstand anticipated Loadings. The manufacturers name and the tank <br />L capacity shall be cast in the cover of the tank. The local health department <br />~ must give prior approval of plans and specifications of any tank fabricated on <br />~ site and such tanks shall be designed, inspected and approved in writing by a <br /> Registered Professional Engineer. <br />j 12. Metal or coated metal tanks shall not be used for septic tanks. Other materials <br />r such as fiber glass or plastic, which produce tanks that are adequate, durable <br />r and resistam to corrosion and decay may be approved by the local health <br /> department. Fiber glass and plastic tanks shall be surrounded by sand or other <br />~' suitable material to protect the tank from punctures. <br /> <br />`. C. Pipe meeting or exceeding ASTM standard 3034 properly supported to prevent failure <br />~ by settling shall extend from the septic tank for a distance of at least five (5}feet from <br /> the inlet and outlet ends. <br />~ 5.02 Soil Absorption System (Genera <br />~~ <br />~ A. For a system treating and disposing of effluem through a soil absorption system, the <br />r' method for calculating minimum absorprion area shall be based upon the amount of <br />r suitable soil and Ute capacity of the soil to absorb liquids as estabhshed by the <br />percolation test and upon design criteria and construction standards for such type of <br />absorption system as set forth in these guidelines. _. <br />LP <br />~ 37 <br />~~ <br />