I did a search on "hedge white flowers" and got:

http://www.ubcbotanicalgarden.org/po...s_carnosus.php

But the leaves are not right.

The photo of the privet hedge he
http://springhillnursery.com/product.asp?pn=66517

This is not what I remember, but is too dense. I think there were
long stems. I don't know. This may be a hopeless quest over a memory
that is not too well recalled.