Investor Presentaiton

ESOL IS A LEADER IN ENVIRONMENTAL AND REGULATED WASTE MANAGEMENT Highly complementary assets aligned with Harsco's environmental services focus Expands geographic portfolio across U.S., creating leading national hazardous waste processing platform M Clean Earth team's institutional knowledge and proven ability to optimize ESOL assets Expands exposure across value chain through large logistics fleet Meaningful opportunities for operational improvement cost synergies and revenue growth West (ESOL) # of TSDFS - 5 # of 10-Days - 19 West (Clean Earth) # of TSDFS-0 32 # of other sites - 2 South (ESOL) # of TSDFS - 2 North (ESOL) # of TSDFS-2 Clean Earth hazardous waste facility ESOL TSDF North (Clean Earth) # of TSDFS-1 # of 10-Days - 5 # of other sites - 0 # of 10-Days - 9 © 2020 Harsco Corporation. All Rights Reserved. This document and the information set forth herein are the property of Harsco Corporation. South (Clean Earth) # of TSDFS-0 # of other sites - 0 Northeast (ESOL) # of TSDFS-3 # of 10-Days -8 Northeast (Clean Earth) # of TSDFS - 2 # of other sites - 3 Southeast (ESOL) # of TSDFS-1 # of 10-Days - 7 Southeast (Clean Earth) # of TSDFS-3 # of other sites - 1 HARSCO 19

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