How best to round down decimal values in a string column?

Hi All,

Question: What's the best way to ID decimal values in a string column?  (Not every value contains a decimal point.)

Background: We have a string column that contains mostly decimal values like "12.050", "1.450", and "9.830", besides the occasional "NA" value.  I need to strip the final 0 out of the thousandths place wherever there is thousandths place.  (There's always a zero at the thousandths place as our business does not deal in thousandths.)

I can't simply convert the string because of the occasional "NA" values.  "NA" is the only non-numeric value that should ever occur in this column.  I assume I need to split the data set with "NA" records on one side and the remaining [numeric] values on the other side.  What's the proper way to do this?

We're using SQL 2008 R2 and SSIS 2008.

Thanks,
Erc