CORRIGENDUM No-012016 : TENDER FOR PROVISION OF SECURITY SERVICES AT STAGE-2A UNDER GROUND METRO STATIONS VIZ.CHENNAI CENTRAL, EGMORE, NEHRU PARK, KILPAUK, PACHAIAPPAS COLLEGE, SHENOY NAGAR, ANNA NAGAR (EAST), ANNA NAGAR (TOWER), THIRUMANGALAM, AND CMRL DEPOT, ADMIN BUILDING PREMISES AT KOYAMBEDU