iwol
The Nikon D70 you own is a superb Camera... i know im a Nikon man myself ;)
the settings for this kind of shot (and any other) depend on the conditions, how bright it is is very important for Long exposure shots... so are different each time
this is because cameras are designed to drag in as much light as possible... and the better cameras do this the best... they have to because usually they have the fastest shutter speed, meaning they have to suck in as much light as possible in 1/1600 of a second or more.
so if you understand that, then you will understand that during the day.. leaving the shutter open for 10 seconds!! will usually result in a picture really over exposed.... and you end up with just a white picture.
The more popular Long Exposure shots... the ones at night were all the cars leave light trails red/white are easier because its night time and is dark to start with
so try this for a daytime Long Exp.
ISO 100
shutter speed 10 secs
F29 (higher the better)
now take the picture, if its too dark drop the F stop down a little lower and re try.
If its still to light!! it must be a very sunny day, try and shoot from the shade or with the sun behind you... failing all that you need a ND filter, to darken the shot ;)
oh, and is if i need to mention this.... you need to use a tripod too
the slightest movement in the 10 seconds, and everything goes blurry..whoops