The singly ionized states from the core orbital in the EOM-CC method remain embedded in the continuum of the satellite states formed due to ionization from valence orbitals. This leads to convergence issues in the Davidson iterative diagonalization step. One of the easy solutions to the problem is to use the core-valence separation(CVS) approach of Cederbaum et al. In CVS approximation, the core and valence orbitals are decoupled based on their difference in energy. Coriani and co-workers have extended the idea to the EOM-CC method and shown that the use of core-valence separation can solve the convergence issues for coreionized/excited states without introducing any significant error. In this work, core-valence separation is implemented at IP-EOM-CCSD by projecting out the valence part of the EOM-CCSD left and right vector. , as well as the recently proposed "frozen-core CVS" method scheme of Coriani and co-workers 50 have been implemented. In the latter approach, the ground state coupled cluster amplitudes are solved using the frozen core approximation. As the 'star' correction is not iterative, it is not essential to use core-valence separation for the left and right IP-EOM triples vector. However, one can gain significant computational gain by avoiding the construction