Patrick Autocare is planning to boost its car storage capacity at Kembla Grange by as many as 8500 vehicles.
The company established a storage site on Reddalls Road in 2012 which can hold as many as 4000 cars.
Under stage two of the development, two adjoining blocks of land totalling 20.26 hectares - one opposite the existing site and the other facing West Dapto Road - will be turned into a storage facility for 8500 cars and as many as 89 staff parking spaces.
Port Kembla is now the main facility in NSW for car imports, according to a report prepared for Patrick by Cardno Wollongong.
"Since the state government consolidated the automotive and general cargo facilities from Port Jackson into one facility at Port Kembla, Patrick Autocare has been gradually shifting its existing automotive processing and storage operations at Ingleburn, which was originally built to facilitate import trade through Sydney Harbour, to the Illawarra region," the report stated.
The Cardno report highlighted the most likely route that car carriers would take from the port to the storage site.
Car carriers would travel along Springhill Road and Masters Road and onto the Southern Freeway. From there trucks would exit at Northcliffe Drive and onto the Princes Highway.
"This route along Northcliffe Drive would pass a large lot rural residential area adjacent to Kembla Grange Racecourse," the report said.
"This will cause acoustic impact on these residents from truck movements. However, this road corridor is used extensively by industrial operations within Unanderra and the increased truck movements will not result in a significant increase in noise generation."
Further, a traffic assessment by Cardno said the expected number of daily truck movements in and out of the facility would be equivalent to those from the Ingleburn site, which averaged 51 in October 2012.
The report pointed out that this figure would be slightly lower than the number of daily movements generated by the industries that previously occupied the two sites.
Work would be required to widen Reddalls Road at the entrance, to allow cars to pass trucks turning right into the site.
Also, the West Dapto Road-Princes Highway intersection would "continue to operate at a satisfactory level of service over the next 10 years".
After that point, the reports stated, it would need an upgrade due to the increase in "background traffic" created by developments at West Dapto, even without the storage site being built.
The site would also feature extensive security measures.