Section Env-Wq 2101.20 - Single-Pass Cooling Systems for ICI Water Users(a) Single-pass cooling systems shall not be installed.(b) If water is used in an existing single-pass cooling system, the owner shall replace or retrofit the process by using one or more of the following methods to achieve maximum water conservation within 5 years of the source activation date: (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.(c) If the ICI water user has any process that results in the discharge or disposal of unused water, the owner 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.(d) The owner shall modify each process identified pursuant to (c) above within 5 years of the source activation date by installing: (1) Automatic shut-off devices to prevent the discharge of water to waste; and(2) Sensors that optimize the use of water.N.H. Admin. Code § Env-Wq 2101.20
Amended by Number 28, Filed July 11, 2024, Proposed by #14004, Effective 6/22/2024, Expires 6/22/2034.