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] <br /> ] <br /> ] <br /> ] <br /> ] <br /> 1 <br /> l <br /> ] <br />1 <br />] <br />] <br /> <br />§ 8.30 <br /> <br />(b) The invert of the ~nlet pipe ~hall be at least 1 inch hdgher <br /> than the invert of the outlet pipe to the next trench. <br />(c) The invert of the outlet pipe to the next trench shall be at <br /> ]east 2 inches hJ~her than the invert of the outlet pipe of <br /> the trench in wkich the box is located. <br />(d) When sewage t~uk effluent is delivered to the drop box <br /> by a pump, the p~mp discharge shall be directed <br /> against a wall or side of the box on which there is no <br /> outlet. <br />(fl The drop box shah have a removable cover either flush <br /> or above f~u~shed grade or covered by no more than G <br /> inches of soil. <br /> <br />b. Pressure ~bution. <br /> <br />Pressure distribution laterals shall be sized as shown in <br />Table I. <br /> <br />Laterals shall be spaced no further than 20 inches from a <br />trench or bed w~]l. <br /> <br />3. Laterals shall be spaced no further than 40 inches apart. <br /> <br />4. Laterals shall be connected to a header pipe which is at least <br /> 1-1/2 and no more than 2 inches in diameter. <br /> <br />2V~ax~m~m Allowable Lateral Lengths In Feet From Header Pipe <br />Perfora~on Spac.ng <br /> <br />Perf. 2.5 Feet 3.0 Feet <br />Dia. tSpe Dia. Pipe Dia. <br /> <br />3/16" 34" 52 70 38 60 75 <br /> <br />Sub& 5. Ik~nff <br /> <br />a. Dosing <br /> <br />The dosing chmmber shall be watertight and constructed of <br />sound and durable materials not subject to excessive <br />corrosion or decay. <br /> <br />There shall be one or more manholes, at ]east 20 inches in <br />dimension, and preferably located directly above the dosing <br />device. The manhole shall extend through the dosing <br />chamber cover to final grade and shall be so constructed as to <br />prevent unauthorized entry. <br /> <br />PrLnted 12/28/90 <br /> <br />Page 247 55 <br /> <br /> <br />