One drink driving charge was for a breath alcohol result of 1084mcg of alcohol per litre of breath - the limit is 400mcg - in October 2009.
Defence lawyer Barry Hart said his client had a serious alcohol problem, drinking on a daily basis after he lost $20 million in a failed business venture.
The investment banker had received addiction counselling at the Capri Clinic and now attended Alcoholics Anonymous meetings every day.
Judge Bouchier sentenced the man to 220 hours of community work, intensive supervision and disqualified him from driving for two years.
A BMW registered in the man's name may be confiscated at another court hearing on Monday. He declined to comment outside court.
Mr Culpan's death was referred to the Coroner in July and the circumstances surrounding the incident could be investigated further at an inquest hearing.