True or False: Percolation rates slower than 90 minutes per inch are acceptable for standard absorption fields.

Standard absorption fields are designed to function effectively with certain percolation rates that determine how quickly water can be absorbed into the soil. A percolation rate slower than 90 minutes per inch is considered inappropriate for standard absorption fields because such slow rates can lead to problems like inadequate drainage, potential saturation, and the risk of system failure. The ideal percolation rate for many standard systems typically falls within a range that ensures adequate treatment and dissipation of wastewater.

For instance, optimal rates often range from 30 to 60 minutes per inch. Slower rates can hinder the ability of the absorption field to function properly, causing effluent to pool above the ground or contaminating surrounding areas. Therefore, percolation rates slower than 90 minutes per inch are not suitable for standard systems, making the statement false. Local regulations may impose additional standards or exceptions, but generally, the accepted engineering principles dictate that such slow rates are not appropriate for standard absorption fields.