The CBI has been probing Srivastava and middlemen B L Bajaj in an alleged disproportionate assets case and the ED took cognisance of this to register a new complaint against them under the Prevention of Money Laundering Act (PMLA) last year.
The assets which have been attached include ornaments, gold bricks and cash worth Rs 9.5 lakh kept in a bank locker in Delhi.
"The attachment of assets has been done on May 21 and recently the notices have been issued to the accused in this regard," official sources said.
An attachment action under money laundering laws is aimed at depriving the accused the benefits of ill-gotten wealth.
In its charge sheet filed in this case, CBI had alleged that Srivastava has amassed movable and immovable properties which were more than 201 per cent above his known sources of income.
CBI had said they have had found assets worth Rs two crore which Srivastava could not explain from his known sources of income.
Srivastava, Bajaj and their wives were arrested in February 2012 after CBI recovered about 10 kg of gold bricks and jewellery valued at around Rs 2.13 crore besides Rs 30 lakh in cash from their possession.
The National Aluminium Company Limited (Nalco) is a government PSU.