The chairman of St Mark’s College at Adelaide University has announced he is standing down from his role and the entire College Board would be dissolved following explosive allegations of a culture of hazing , bullying and sexual assault aired on 60 Minutes .

Outgoing chairman Richard Burchnall made the announcement in a letter to the St Mark’s College community.

“It was decided last night that the council will be asked to appoint a new college board,” Mr Burchnall said.

St Mark's College chairman Richard Burchnall has announced he is quitting. Picture: 60 Minutes (Nine)

“While I’m extremely sad to be leaving, standing down as chair provides the college with an important opportunity for renewal after what has been an enormously challenging period for students and staff.”

“Thank you again for your ongoing support during these trying times.”

The ‘trying times’ Mr Burchnall refers to is thought to be the intense media scrutiny placed on the institution following the ongoing 60 Minutes investigation.

St Mark's College has come under fire since the explosive revelationss were aired on 60 Minutes. Picture: 60 Minutes (9news)

Last Sunday, reporter Allison Langdon shared the accounts of two students who claimed they were sexually assaulted while living at St Mark’s.

She also revealed evidence of sordid O-week magazines produced by students at the College, and described degrading sex tours carried out at St Mark’s.

60 Minutes first broadcast allegations about ritualistic hazing at the college in March, interviewing 18-year-old Aria Kirwan who bravely detailed her distressing experience at St Mark’s College.

Ms Kirwan said in her first week at college she was confronted by naked men, and students simulating sex acts. She also saw hardcore pornography while on the so-called ‘sex tour’ of the campus, and was later forced to undress for older male students.

A major 60 Minutes investigation has exposed a toxic culture at the prestigious St Marks College at Adelaide University. Picture: 60 Minutes (9news)

Following the first report, 60 Minutes was inundated with almost 200 explicit photographs and videos taken inside St Mark’s.

The program also detailed allegations of sexual harassment and assault.

One former St Mark’s student – who was given the name Elizabeth to protect her identity – told 60 Minutes that she was sexually assaulted multiple times during her first year at college, the first time being her very first night in at the college.

On another occasion, she says she was dragged into an older male student’s room. “He was extremely drunk and he wanted to talk,” Elizabeth said.

“So I stood outside of his unit (but) he grabbed me and pulled me into his room, slamming the door. The next day I had bruises.”

Allegations of bullying, alcohol abuse and sexual assault were heard during the investigation. Picture: 60 Minutes (9news)

“He knew that he'd done something wrong and he came to talk to me. And he said, ‘Oh, I hope you don't go to the police.’”

Elizabeth said she reported her assault to the college at the end of the year, but the complaint fell on deaf ears.

“[I said] I had experienced sexual assault and that it had really impacted me," she said.

She says the response was; “That it's all part of growing up.”

However this shocking behaviour was not an isolated case.

60 Minutes also spoke with “Jenny”, another former resident of St Mark’s College who said she was sexually assaulted after passing out following a night of excessive drinking.

“My friend showed me photos a group of men had taken of me,” she told Langdon.

The college's initial response has angered the University of Adelaide’s Student Representative Council (SRC) who told 60 Minutes “enough is enough”. Picture: 60 Minutes (9news)

“I was stripped down to my bra and underpants. The photo showed the group of men crowded around me and touching me on different parts of my body.

“One of them was propping me up under my arms and another was pretending to sniff my hair. Another man had his hands on my breasts.”

Despite substantial evidence proving a toxic culture at the college, St Mark’s leadership – including College Master Rose Alwyn and St Mark’s Chairman Richard Burchnall – denied there was a serious problem.

Instead, after the first 60 Minutes report three months ago, they released a statement claiming 60 Minutes had given viewers a "very distorted, misleading and sensationalised picture of St Mark’s, alleging that a toxic culture exists here, something we completely reject".

But St Mark’s last week finally admitted in a letter to Aria Kirwan it accepted she was telling the truth.

Sharna Bremner has vowed to end the sordid actions of people on campus. Picture: 60 Minutes (9news)

Aria Kirwan bravely detailed her distressing experience at St Marks. Picture: 60 Minutes (60 Minutes)

The letter said where her "allegations had been substantiated" the college’s internal punishment for those who "breached college behavioural guidelines" would be "a three hour workshop on gender equity, sexual harassment and what it means to be an ethical bystander".

One serious allegation the college said they were not able to "establish the veracity of" had been reported to South Australian Police.

St Mark’s had also previously denied that the obscene "O-Mag" – a magazine given to arriving first year students detailing vile, sexually degrading material and expectations of their behaviour at college – was published outside of the 2013 leaked copy.

Rose Alwyn called the 2013 "O-Mag" disgusting, abhorrent and the reflection of a toxic culture restricted to one bad year.

However this is another denial that Langdon disproved, revealing an almost identical magazine was printed two years later in 2015.

Sadly, hazing is conduct not confined to St Marks.

College Master Rose Alwyn initially denied there was a serious problem at the college. Picture: 60 Minutes (9news)

Students across Australia are sick of the out of control drinking, bullying and serious sexual assaults at these supposedly prestigious colleges, and demanding there be change.

For Adelaide University’s Student Representative Council (SRC), enough is now enough.

They are campaigning to protect all students from hazing – something they feel St Mark’s and Adelaide University are not doing enough to prevent.

“I almost hope [this damages the reputation of Adelaide University],” the SRC told Langdon.

“I almost wouldn't mind. If that puts the university in a place, or they feel like they lose numbers then good. It shows them that they haven't done enough.”

In his latest letter to the St Mark’s community, Mr Burchnall revealed that the college had commissioned an independent review earlier this year and was awaiting it’s advice.

Mr Burchnall said he hoped the new St Mark’s leadership team - which will be determined in July – heeded the report’s findings.

“[The report] will no doubt provide valuable information that the new Board can use to chart a roadmap for the College's future,” Mr Burchnall wrote.

“I will be doing all that I can over coming weeks to ensure a smooth transition.”

To watch "F for Fail" in full, head to the 60 Minutes website.

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