When an optoelectronics enterprise installs pollution control equipment to treat air pollutants so that they meet the emission standard regulations in Article 4, flow meters and pollution control equipment monitoring facilities shall comply with the following regulations:I. Gas flow meters shall be installed at the VOC-containing waste gas inlets or outlets of pollution control equipment, and liquid flow meters shall be installed on washing water cycle pipes connected with wet washing equipment.II. Pollution control equipment shall have operating condition monitoring facilities, which shall take records of the items listed in attached table at the specified frequencies.III. Monitoring facilities shall have effective quarterly monitoring time percentages greater than 80%. Gas flow meters and liquid flow meters shall be calibrated once each year.Operating records of the pollution control equipment in the foregoing paragraph shall be preserved five years for future reference.If the flow meters and monitoring facilities in the first paragraph cannot be installed for some reason, the firm may submit an alternative monitoring program to the local competent authority for approval.Attached table：pollution control equipment operating record items.pdf