EPSQ is outdated, they now use EQIP. Go see your S2 they should be able to send you the link. You fill it out online instead of having a hardcopy like a SF86.
Here's the E-QIP site, but you'll need to be granted access by your security personnel: http://www.opm.gov/e-qip/
I just finished mine this past week and it took about two hours if you have most of the information.
NOTE: If you need to gather addresses and phone numer from people you used to work with and may be still associated with the military, use AKO to search for their information.