Laserfiche WebLink
(e) Where the slope of the ground surface <br /> does not exceed six (6) inches in any <br /> direction within the area utilized for <br /> the absorption field, the septic tank <br /> effluent may be applied to the absorption <br /> field through a system of inter-conn- <br /> ected tile lines and trenches in a <br /> continuous system. The bottom of the <br /> trenches and distribution lines shall <br /> be constructed on a relatively level <br /> grade, not to exceed six (6) inches <br /> difference in elevation. <br /> (f) Where the slope of the ground surface <br /> exceeds six (6) inches in any direction <br /> within the area utilized for the absorp- <br /> tion field, serial distribution may be <br /> used. The bottom of the trenches and <br /> distribution lines shall be constructed <br /> a relatively level grade. The distrib- <br /> ution tile system shall be arranged <br /> so that each trench shall be filled <br /> with septic tank effluent before <br /> effluent flows to succeeding trenches. <br /> The invert of the overflow pipe in <br /> the first relief line shall be at <br /> least four (4) inches lower than the <br /> invert of the spetic tank outlet. <br /> (4) Minimum seepage area of the disposal field <br /> (total flat area of trench bottom exclusive <br /> of sidewall area) shall be determined by <br /> the following percolation test procedure <br /> as applied to Table 2. <br /> (a) Number and location of tests . Two or <br /> more tests shall be made in separate <br /> test holes spaced uniformly over the <br /> proposed absorption field site . <br /> (b) Type of test hole. A hole with horizon- <br /> tal dimensions of four (4) to twelve <br /> (12) inches and vertical sides shall <br /> be dug or bored to the depth of the <br /> proposed absorption trench. The holes <br /> may be bored with an auger of not less <br /> than four (4) inches in diameter. <br /> -10- <br />