• e-mail

A Covid-infected worker at a Sydney building firm may have exposed hundreds to the virus after turning up for work for two weeks while unknowingly infectious, health officials fear, as the city endures a relentlessly extending lockdown.

An urgent alert is out for anyone who visited the Greenacre firms D&M Excavations and Hanson Concrete Australia in Bullfrog Street at any time between July 1 and July 13, who must isolate immediately and get tested.

It's feared the employee could have come into contact with potentially hundreds of customers and staff during the nearly two week window.

The warning came as NSW Health named a further 32 new exposure sites across the city and beyond, with two new worrying hotspots named in the south of the state.

Sydney and its surrounding regions are nearing the end of a third week of lockdown, which has since been extended until at least July 30 to stem the spread of the Indian Delta variant. 

NSW Health have named a further 32 new exposure sites across Sydney and beyond, with two new worrying hotspots named in the south of the state (pictured, a woman walks along a quiet Milsons Point on Wednesday)

A worker at Sydney building firm Hanson Concrete Australia in Greenacre (pictured) may have exposed hundreds of people after turning up for work for two weeks while unknowingly infected with Covid

Two Shell service stations on the road south from Sydney to Melbourne have been named as close contact sites after a traveller stopped off there while infectious.

Anyone who was at the Shell petrol station in South Gundagai on Thursday July 8 between 1am and 1.30am is a close contact and must go into immediate isolation and get tested.

There's an identical alert for another Shell petrol station close to the Victorian border in Jindera, where an infected person stopped off on Saturday July 10 between 11.10 and 11.45am. 

A third Shell service station in Hay in the NSW Riverina region has also been named as a casual contact site. 

Two Shell service stations on the road south from Sydney to Melbourne have been named as close contact sites after a traveller stopped off there while infectious

An infected passenger has also made repeated trips on the 309 bus route in Sydney between the city centre and Beaconsfield on July 6 and 7, sparking another close contact alert.

Meanwhile, nine locations have been identified as casual contacts sites including an infected person who made several trips to the Strathfield 7-Eleven, and another who visited the Greenacres McDonald's.

Hurstville Woolworths and Pyrmont Coles were also casual contact exposure sites, said NSW Health.

Another 18 locations across Sydney's east, west and south - including Liquorland and Coles in Bondi Junction, the Kmart in Fairfield and  Priceline Pharmacy in Sutherland - have been identified as possible hotspots where anyone showing symptoms should isolate and get tested.

An infected passenger made repeated trips on the 309 bus route in Sydney between the city centre and Beaconsfield on July 6 and 7 (pictured, a Sydney bus)

NEW: USE DAILY MAIL AUSTRALIA'S TRACKER TO FIND THE LATEST EXPOSURE SITES NEAR YOU

The huge haul of new locations came on the day Premier Gladys Berejiklian extended the Greater Sydney lockdown for another two weeks after another 97 cases were reported.  

Ms Berejiklian said the city's strict lockdown - which includes Greater Sydney, the Blue Mountains, the Central Coast and Wollongong - will be extended at least until 11.59pm on July 30, and would continue after that unless the number of carriers active in the community dropped to near zero.

'It always hurts to say this, but we need to extend the lockdown for at least another two weeks,' she said.

'I appreciate people are stressed and upset about what is going on, myself included. None of us want to be in this situation.'

Another 18 locations across Sydney's east, west and south - including Liquorland and Coles in Bondi Junction, the Kmart in Fairfield (pictured) and Priceline Pharmacy in Sutherland - have been identified as possible hotspots

Greater Sydney's five million residents will continue to be banned from leaving the home unless they have an essential reason, and online learning for schools will be compulsory for at least the next fortnight despite the Premier having previously said it would likely only be for this week.

NSW Health said 70 of the cases came from south-west Sydney, but that there were now other suburbs across the city which are of 'significant concern'.

Three-quarters of the cases recorded overnight were found in the Fairfield local government area, while the Liverpool and Canterbury-Bankstown council regions are also experiencing very high levels of transmission.

A Covid-infected worker at a Sydney building firm may have exposed hundreds to the virus after turning up for work for two weeks while infectious (pictured, workers in Sydney on Wednesday)

'The (other) areas of concern are Roselands, Rosebery, Belmore, Sutherland Shire, the St George area, Windsor, St Ives, Penrith and the Bayside local government area,' Ms Berejiklian said. 

The premier praised Fairfield locals for their response to the area's stricter testing restrictions, which saw testing centres overwhelmed on Monday morning, forcing people to queue for hours in chaotic scenes.

'Fairfield has responded in an outstanding way,' she said. 

The Sydney outbreak has now spread to Victoria after infected removalists took the disease south, sparking a new cluster and the fear of a fifth lockdown for the state.

The huge haul of new locations came on the day Premier Gladys Berejiklian extended the Greater Sydney lockdown for another two weeks after another 97 cases were reported (pictured, the coronavirus-exposed Coles at Bondi Junction)

Tough Covid restrictions are expected to be imposed on Melbourne in the coming days after the city recorded 11 new cases. 

Mandatory masks have been brought back in from Thursday, with discussions ongoing about a possible three-day snap lockdown or new visitor limits.   

The changes could come into effect as early as Thursday, industry figures told the Herald Sun. 

Victorian Government is understood to be weighing up which restrictions need to be enforced to prevent the spread of the virus and prevent a full-blown outbeak.

Four of the new cases recorded on Wednesday are residents on the third floor of the Ariele Apartments in Maribyrnong, which has been in lockdown since Monday night after the infected removalists from Sydney visited the building.

Nine new locations have been identified as casual contacts sites including an infected person who made several trips to the Strathfield 7-Eleven, and another who visited the Greenacres McDonald's (pictured)

Four of the new Melbourne cases are residents on the third floor of the Ariele Apartments (pictured) in Maribyrnong after infected removalists from Sydney visited the building

Among those cases is a man in his 60s, who subsequently infected his parents, aged 89 and 90.

The man also attended an AFL match between Carlton and Geelong on Saturday and Highpoint Shopping Centre on Friday.

He went to the game with a teacher, who has also tested positive and spread the virus to two household contacts. 

Three other new cases are from another apartment in the building. The two infected apartments are on the same floor.  

Victoria's Covid-19 commander Jeroen Weimar urged anyone who visited an exposure site or has symptoms to get tested.

Victoria's Covid-19 commander Jeroen Weimar (pictured) urged anyone who visited an exposure site or has symptoms to get tested.

'The next two days are particularly critical. We are right on the heels of this particular outbreak,' he told reporters on Wednesday.

The spread of the disease has caused chaos for families trying to travel from Victoria to Western Australia. Anyone arriving in WA from Victoria must now either quarantine for 14 days or return to Melbourne.