PERTAMINA (NIAGA NON BBM), PT DKI Jakarta Benzol (Benzene), Lubricating Oils, Petroleum Btumen & Oth. Residues of Petroleum Oil, Petroleum coke, Xylol (xylenes), Martiono Hadianto, Ari H. Soemarno, Mita Purwanti Mk.mita.purwanti@pertamina.com (62-21) 31907190, 31907191, 31907192, 31907193 www.pertamina.com (62-21) 31907190 Jl. Medan Merdeka Timur No. 1A, Jakarta Pusat