bids are invited for item-1 - checking of environmental parameter of pollutants at effluent treatment plant (etp) of ed&sed and sewage treatment plant (stp) colour & odour , item-2 - checking of environmental parameter of pollutants at effluent treatment plant (etp) of ed&sed and sewage treatment plant (stp) suspended solids mg/ltr. , item-3 - checking of environmental parameter of pollutants at effluent treatment plant (etp) of ed&sed and sewage treatment plant (stp) particular size of ss , item-4 - checking of environmental parameter of pollutants at effluent treatment plant (etp) of ed&sed and sewage treatment plant (stp) ph value , item-5 - checking of environmental parameter of pollutants at effluent treatment plant (etp) & sewage treatment plant (stp) temperature °c , item-6 - checking of environmental parameter of pollutants at effluent treatment plant (etp)of ed&sed and sewage treatment plant (stp) oil and grease mg/l max. , item-7 - checking of environmental parameter of pollutants at effluent treatment plant (etp) of ed&sed and sewage treatment plant (stp) total residual chlorine,mg/l , item-8 - checking of environmental parameter of pollutants at effluent treatment plant (etp) of ed&sed and sewage treatment plant (stp) ammonical nitrogen as (n) mg/l max , item-9 - checking of environmental parameter of pollutants at effluent treatment plant (etp) of ed&sed and sewage treatment plant (stp) total kajeldahl nitrogen as (nh3) mg/l. max , item-10 - checking of environmental parameter of pollutants at effluent treatment plant (etp) of ed&sed and sewage treatment plant (stp) free ammonia (as nh3) mg/l max. , item-11 - checking of environmental parameter of pollutants at effluent treatment plant (etp) of ed&sed andsewage treatment plant (stp) biochemical oxygen demand (5 days at (20°c) mg/l max. , item-12 - checking of environmental parameter of pollutants at effluent treatment plant (etp) of ed&sed and sewage treatment plant (stp) chemical oxygen demand, mg/l ma