Hi-Tech Carbon Renukoot plant Murdhawa Industrial Area P.O. Renukoot Dist. Sonebhadra Uttar Pradesh 231 217 Tel: (91) 5446 252 387-91 Email: hitechr@adityabirla.com   Gummidipoondi plant K-16, Phase II, Dist. Thiruvallur SIPCOT Industrial Complex Gummidipoondi 601 201 Tamil Nadu Tel: (91) 44 2798 9233 / 6 Email: htcgmd@adityabirla.com   Delhi office (Marketing and commercial) 910/911, Kailash Building Kasturba Gandhi Marg New Delhi 110 001 Tel: (91) 11 2335 1069-71 Fax: (91) 11 2335 0594 / 6504 E-mail: hitechcarbon@adityabirla.com   Kolkota office (Marketing) Industry House, 17th floor No.10, Camac Street Kolkata 700 017 Tel: (91) 33 2282 7215, 2282 1689 Fax: (91) 33 2282 6626 E-mail: htccal@adityabirla.com   Mumbai office (Marketing) 96/A, Ahura Centre, Mahakali Caves Road, Andheri (E) Mumbai 400 093 Tel: (91) 22 6692 8500 / 2824 4286 Fax: (91) 22 6692 8501 / 2824 4285 E-mail: htcmum@adityabirla.com