Anyone who attended the Hungry Jacks Marulan in the NSW Southern Tablelands on July 10 between 5pm and 5.30pm is considered a casual contact and must get tested immediately and isolate until a negative result is received.

They are also required to monitor for any symptoms and immediately isolate and get tested.

It is understood by the Hungry Jacks store is closed for a deep clean.

BP Marulan Northbound is also closed. A spokesperson at the store could not confirm whether it was related to the Covid positive case. It has not been listed on the NSW public health alert list as of July 13, 2:30pm.

Residents are urged to check the NSW Government website regularly, as the list of venues of concern and relevant health advice are being updated as investigations continue.

Anyone with even the mildest of cold-like symptoms is urged to immediately come forward for testing and isolate until a negative result is received.

Earlier today NSW Premier Gladys Berejiklian announced a new Public Health Order requiring people who leave Fairfield for essential work to get tested for Covid-19 every three days, and people from Greater Sydney to undergo weekly tests.

She said this would "reduce the instance of essential workers passing on the virus".

Goulburn on NSW's Southern Tablelands has registered a positive COVID case, according to the Health Ministry.

The Goulburn Post understands the case emanated from a hospital construction contractor from Sydney working on the $150 million redevelopment last week.

The man is now reportedly in isolation however The Post has been told that hundreds of people at the site and in the hospital have been advised to undergo testing.

Goulburn MP Wendy Tuckerman also confirmed the case.

"I am currently liaising with the local health district for additional pop-up testing clinics - more information to come," she posted on her Facebook page.

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The Post has also asked NSW Health about its screening procedures for contractors from Sydney hotspots and what testing was now in place.

Goulburn Hospital COVID testing is available from Tuesday to Friday from 7am - 4pm (until all patients have been tested) and 9am - 1pm Saturday and Sunday.

Laverty drive through is also at Seiffert Oval available 8am - 5pm weekdays and 8am - 1.30pm Saturday and Sunday.