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I
Impervious Material - Soils with a percolation rate greater than 60 minutes per
inch. (See, also, the definition of unsuitable material.)
Industrial Waste - Any water-carried or liquid waste resulting from any process
or industry, manufacture, trade, business, or activity listed in (310 CMR 15.004).
Infiltration Capacity - Maximum rate at which water can infiltrate into soil under
a given set of conditions.
Infiltration Rate - Rate at which water penetrates the surface of the soil at any
given moment, usually expressed in inches per hour.
Inlet and Outlet Tees - Device on inlet and outlet ports of septic tank. The
sanitary tee pipe at the tank inlet slows the incoming rush of water to prevent
disturbance to the scum layer and reduce turbulence. The sanitary tee pipe
located at the tank's outlet keeps solids, scum and grease from leaving the
Innovative/Alternative (I/A) System - Any on-site wastewater disposal system or
standard on-site system. A conventional, or standard, system has a septic tank,
distribution box or dosing mechanism, a soil absorption system (SAS), and a
reserve area.
inch. (See, also, the definition of unsuitable material.)
Industrial Waste - Any water-carried or liquid waste resulting from any process
or industry, manufacture, trade, business, or activity listed in (310 CMR 15.004).
Infiltration Capacity - Maximum rate at which water can infiltrate into soil under
a given set of conditions.
Infiltration Rate - Rate at which water penetrates the surface of the soil at any
given moment, usually expressed in inches per hour.
Inlet and Outlet Tees - Device on inlet and outlet ports of septic tank. The
sanitary tee pipe at the tank inlet slows the incoming rush of water to prevent
disturbance to the scum layer and reduce turbulence. The sanitary tee pipe
located at the tank's outlet keeps solids, scum and grease from leaving the
Innovative/Alternative (I/A) System - Any on-site wastewater disposal system or
standard on-site system. A conventional, or standard, system has a septic tank,
distribution box or dosing mechanism, a soil absorption system (SAS), and a
reserve area.
