Water not requiring treatment or uncontacted cooling water may not be mixed with treated effluent before discharge.

Those enterprises permitted store effluent shall make appropriate markings on the exterior of storage tanks or containers, and shall record storage time, method, volume, subsequent treatment method, and treated water volume on a daily or by-batch basis. Records shall be preserved for three years for audit by the competent authority.
The storage tanks or containers in the foregoing paragraph shall be equipped with measurement facilities sufficient to display the stored water volume or other measurement method approved by the competent authority.