The versatile 26-year-old defender, who played in all four of the Netherlands' games in Euro 2008, is expected to be sold for £4million.
Since moving to Stamford Bridge in 2006 for £8.5million from Hamburg, the Dutch defender has found his first-team opportunities limited.
Boulahrouz (left) holds off Antonio Di Natale during Euro 2008
Boulahrouz spent last season on loan with Sevilla, where he made only eight appearances due to problems with injuries and form.
'He is just the man we were lacking," Veh told the Bild newspaper.
'He is one who is not scared of getting involved when needed.'
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