The NSW Department of Planning and Infrastructure has fined the Integra coal mine for exceeding its blasting limits.
Last month the Department fined the miner $3000 for exceeding overpressure limits at its Camberwell coal mine.
"The blast was measured at 126.1 decibels at one monitor, exceeding the 120 decibel limit," the Department says.
Despite being louder than allowed, it did only result in one compliant.
It comes after the Department has recorded a number of blasts that exceeded the overpressure limits at Integra.
In response to the latest fine Integra will now carry out a number of measures to minimise future risk.
This includes ensuring all exploratory or test holes are filled and closed off after completion; comprehensive chicks for old drill holes; new change off procedures following explosive loading; improving drill rig accuracy; and improving notification of blast times.
Overall the Department's Singleton office received 40 complaints; 23 of which related to noise, four to dust, nine for blasting, and four for other compliance matters.
The majority of the complaints again related to Rio Tinto's Mt Thorley Warkworth coal mine, which was the subject of an independent review earlier this year.