PION modeling of the LEG spectrum of NGC 5548 with n_H = 10¹⁰ m^-3 (upper panel) and 10¹⁴ m^-3 (lower panel). The spectral bin size is 0.025 Å. The overall C statistics is 5146.0 (d.o.f. = 4843) at low density and 5124.7 (d.o.f. = 4842) at high density. The two density sensitive metastable absorption lines of Si ix (C-like), from component B, at 55.20 Å and 56.25 Å (in the observed frame) are labeled with ∗.