tender for procurement of sand media, gravels, pebbles and anthracite along with work for top up of filter media in sand and activated carbon filter at stp 500, 900 kld shivariya colony, avgf & dm plant at 2x600 mw, stage - i, sstpp, mppgcl, dongalia , sand media , sand media (stp) , sand media (avgf) , sand media (dm) , gravels , gravels (stp) size:2.5-5 mm , gravels (stp) size:5-10 mm , gravels (stp) size:10-20 mm , gravels (stp) size:20-50 mm , gravels (dm) , pebbles(stp) , pebbles (stp) size: 38.10mm , pebbles (stp) size: 19.05mm , pebbles (stp) size: 9.5mm , pebbles (stp) size: 3.17mm , anthracite , anthracite (avgf)