"service Engine Soon" Light On

[ZX2DRIVER]

The "Service Engine Soon" light came on in my 99' ZX2. I used my EZ Read 2000 OBDII sensor and the code that came up read (Exactly!):

EVAPORATIVE EMISSION CONTROL SYSTEM.

Then it said in ( ):

LEAK DETECTED, SMALL LEAK.

First of all; what would be the first thing to look at or repair that would have to do with "Evaporative Emission Control System"?

Also, have any of you come up with this problem before? If so, what was done to repair it?

Thank you all in advance.

-TNT