Section Env-Wq 2101.20 - Additional Requirements for ICI Water Users(a) If water is used in a single-pass cooling system, the ICI water user shall replace or retrofit the process by using one or more of the following methods to achieve maximum water efficiency within 5 years of source activation: (1) Recirculating cooling techniques to replace some or all of the single-pass water cooling system;(2) The use of sensors and automatic shut-off devices to reduce water used for cooling processes;(3) Implementation of water treatment processes that consume less water than the process(es) being used;(4) Air cooling techniques to replace some or all of the single-pass water cooling system; or(5) Alternative technology that reduces water consumption by at least the amount that would be reduced by implementing one or more processes described in (1) through (4), above.(b) If the ICI water user has any process that results in the discharge or disposal of unused water, the water user shall identify each process where:(1) Water is used to control temperature; and(2) Unused water could be discharged or otherwise disposed of through an overflow or other outlet.(c) The ICI water user shall modify each process identified pursuant to (b), above, within 5 years of source activation by installing: (1) Automatic shut-off devices to prevent the discharge of water to waste; and(2) Sensors that optimize the use of water.(d) Each ICI water user shall implement water conservation practices not described in Env-Wq 2101.19 as described below:(1) The ICI water user shall submit to the department a description of water conservation best management practices or best available technologies that might be applicable to the types of water-using processes at the ICI water user's facility;(2) The ICI water user shall develop a plan and schedule to implement the plan that demonstrates these processes will be implemented within 5 years; and(3) The ICI water user shall implement the plan according to the schedule upon obtaining approval from the department pursuant to Env-Wq 2101.26.N.H. Code Admin. R. Env-Wq 2101.20