Pollutant Group 1 Group 4 Group 4 Group / Group 2 Group 2 Group 2 Group / Code 71002 Group / Pollutant Group 2 Group 1 Group 2 Group / Group 5 76002 Group 6 77002 Group / Group 4 75002 Group 5 76002 Group / Group 3 74002 Group 4 75002 Group / Group 2 73002 Group 3 74002 Group / /