Technical Impracticability Zone definition
Technical Impracticability Zone or “TI Zone” shall mean the area where attainment of certain groundwater Performance Standards has been waived by EPA. This area includes the Source Area Groundwater as described in the 2002 ROD and, geographically, extends beyond the Source Area to run coincident with property lines, to the extent possible. Groundwater Performance Standards shall be attained at the TI Zone boundary and beyond. See Figure 19 of the 2006 ROD for a map of the TI Zone.