With the introduction of rainwater discharge outlets into the scope of pollutant discharge permit management

industrial enterprises pay more and more attention to the initial rainwater collection and management. By combing

comparing and analyzing the requirements of initial rainwater in relevant standards

the industrial enterprises that need to collect initial rainwater are identified from the perspective of possible pollution and the project industry. By comparing various calculation methods of initial rainwater and combining with the fundamental purpose of initial rainwater management

the selection principles of calculation methods of initial rainwater collection are more clearly and specifically given

and the selection of initial rainwater collection range

rainfall duration and rainfall thickness parameters is refined. Put forward suggestions on the time requirements for initial rainwater collection and post-treatment; From the perspective of the enterprise

the specific guidance on early intervention

daily management and effect evaluation in the initial rainwater collection and management is put forward. From the perspective of the environmental protection department

the supervision suggestions on rainfall period

non rainfall period and the self-monitoring data of the rainwater inlet are put forward; So as to make the initial rainwater collection and management more operable and the daily supervision of the initial rainwater more targeted.