文档介绍：Maximum Percolation Rate What maximum percolation rate does the municipality allow for septic installation? (Title 5: 60 minutes/inch) Title 5 requires a maximum percolation rate of 60 minutes per inch for septic system installation. Some municipalities set the maximum percolation rate at 20, 25 or 30 minutes per inch. Percolation rate is the time it takes one inch of water to drain from a hole dug at the site of a proposed septic system. If the soil in the disposal area is impermeable, the effluent will not percolate effectively through the soil, and a pond of inadequately filtered effluent will remain in the yard. Researcher looked for language such as “soil with a perc olation rate more than 20 minutes per inch will not be considered acceptable” and “the maximum percolation rate shall be 20 minutes per inch.” Where there is no reference in the regulations to a maximum percolation rate, res earcher entered “60.” Issue Overview Research Coding Acton What maximum percolation rate does the municipality allow for septic installation? (Title 5: 60 minutes/inch) 60 While the Acton Regulations maintain the same maximum allowable pe rcolation rate as the state, there are additional requirement s for areas where the percolation rate is greater than 30 minutes per inch: "11- Leaching facilities for new construction, when built in areas where the percolation rate is greater than 30 minutes pe r inch, shall be preceded by a wastewater treatment system that me ets the following treatment standards: Parameter Quarterly Average BOD5 30 mg/L TSS 30 mg/L Total Nitrogen 19 mg/L" Amesbur y What maximum percolation rate does the municipality allow for septic installation? (Title 5: 60 minutes/inch) 60 No reference in Amesbury regulations to maximum percolation rate. Ashland What maximum percolation rate does the municipality allow for septic installation? (Title 5: 60 minutes/inch) 60 Researcher