Duties of the Clerk of Percolation Test Record Results Township Ordinance §32-3 establishes the duties of the Clerk of Percolation Test Record Results The percolation clerk is to "maintain a log of percolation test results which shall be indexed by Tax Map lot and block and street name and shall be include numbers of all percolation test holes dug, depth, and test results; and in addition, soil log results shall also be recorded.  Additional information shall include engineers' and technicians' names, prevailing weather conditions and notes submitted by the percolation test witness."