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A vertical seepage pit installed after the effective date of this chapter shall meet the following requirements:
(a) A vertical seepage pit shall be filled with clean washed rock or gravel grading 1 to 1-1/2 inches to the cap depth with an IAMPO approved perforated pipe extending from the bottom of the pit to the cap. The sidewall depth below the cap shall not be less than 10' and the cap depth of the vertical seepage pit shall not be less than 3'.
(b) Vertical seepage pits are restricted to coastal, sedimentary basins where the groundwater is already degraded as determined by the Regional Boards.
(Amended by Ord. No. 3061 (N.S.), effective 5-11-67; amended by Ord. No. 7428 (N.S.), effective 2-4-88; amended by Ord. No. 9273 (N.S.), effective 12-15-00; amended by Ord. No. 10136 (N.S.), effective 4-15-11)