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  <xs:element id="nvri_SecuritizationAndFactoringFees" abstract="false" name="SecuritizationAndFactoringFees" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nvri_OtherIncludingAsbestosRelatedClaimsMember" abstract="true" name="OtherIncludingAsbestosRelatedClaimsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nvri_AllegedViolationOfEnvironmentalPermitInIjmuidenNetherlandMember" abstract="true" name="AllegedViolationOfEnvironmentalPermitInIjmuidenNetherlandMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nvri_LimitAndReduceTheAccumulationOfCustomerOwnedSlagMember" abstract="true" name="LimitAndReduceTheAccumulationOfCustomerOwnedSlagMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nvri_ViolationsOfTheFederalEmergencyPlanningAndCommunityRightToKnowActMember" abstract="true" name="ViolationsOfTheFederalEmergencyPlanningAndCommunityRightToKnowActMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nvri_AmsterdamPublicProsecutorsOfficeMember" abstract="true" name="AmsterdamPublicProsecutorsOfficeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nvri_CSNMember" abstract="true" name="CSNMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nvri_VoltaRedondaVs.CSNAndEnviriMember" abstract="true" name="VoltaRedondaVs.CSNAndEnviriMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nvri_NumberOfPotentiallyRelatedParties" abstract="false" name="NumberOfPotentiallyRelatedParties" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="nvri_Penalties" abstract="false" name="Penalties" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nvri_CurrentPortionOfEnvironmentalLiabilities" abstract="false" name="CurrentPortionOfEnvironmentalLiabilities" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nvri_TotalEnvironmentalLiabilities" abstract="false" name="TotalEnvironmentalLiabilities" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nvri_LossContingenciesUnpaidServiceTaxes" abstract="false" name="LossContingenciesUnpaidServiceTaxes" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nvri_LossContingenciesOverallLiability" abstract="false" name="LossContingenciesOverallLiability" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nvri_LossContingencyAmountSeekingFromOtherParty" abstract="false" name="LossContingencyAmountSeekingFromOtherParty" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nvri_LossContingencyFineIssuedByCourt" abstract="false" name="LossContingencyFineIssuedByCourt" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nvri_TermLoanFacilityFixedRateMember" abstract="true" name="TermLoanFacilityFixedRateMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nvri_DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationMember" abstract="true" name="DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nvri_NumberOfReportableSegmentsDisclosedByDefinitionFlag" abstract="false" name="NumberOfReportableSegmentsDisclosedByDefinitionFlag" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="nvri_HarscoEnvironmentalSegmentMember" abstract="true" name="HarscoEnvironmentalSegmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nvri_CleanEarthMember" abstract="true" name="CleanEarthMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nvri_HarscoRailMember" abstract="true" name="HarscoRailMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nvri_ServiceAndProductMember" abstract="true" name="ServiceAndProductMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nvri_OtherSegmentActivities" abstract="false" name="OtherSegmentActivities" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nvri_WesternEuropeMember" abstract="true" name="WesternEuropeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nvri_MiddleEastAndAfricaMember" abstract="true" name="MiddleEastAndAfricaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nvri_EasternEuropeMember" abstract="true" name="EasternEuropeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nvri_ProductsAndServicesOnsiteServicesAndMaterialLogisticsProductQualityImprovementAndResourceRecoveryMember" abstract="true" name="ProductsAndServicesOnsiteServicesAndMaterialLogisticsProductQualityImprovementAndResourceRecoveryMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nvri_AppliedProductsMember" abstract="true" name="AppliedProductsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nvri_AluminumDrossAndScrapProcessingSystemsMember" abstract="true" name="AluminumDrossAndScrapProcessingSystemsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nvri_RailwayTrackMaintenanceEquipmentMember" abstract="true" name="RailwayTrackMaintenanceEquipmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nvri_AfterMarketPartsAndServicesSafetyAndDiagnosticTechnologyMember" abstract="true" name="AfterMarketPartsAndServicesSafetyAndDiagnosticTechnologyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nvri_RailwayContractingServicesMember" abstract="true" name="RailwayContractingServicesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nvri_WasteProcessingAndReuseSolutionsMember" abstract="true" name="WasteProcessingAndReuseSolutionsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nvri_SoilAndDredgedMaterialsProcessingAndReuseSolutionsMember" abstract="true" name="SoilAndDredgedMaterialsProcessingAndReuseSolutionsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nvri_ContractAxis" abstract="true" name="ContractAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="nvri_ContractDomain" abstract="true" name="ContractDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nvri_Contract2Member" abstract="true" name="Contract2Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nvri_SBBMember" abstract="true" name="SBBMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nvri_NetworkRailMember" abstract="true" name="NetworkRailMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nvri_DeutscheBahnMember" abstract="true" name="DeutscheBahnMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nvri_PercentageComplete" abstract="false" name="PercentageComplete" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="nvri_IncreaseDecreaseToLossOnContracts" abstract="false" name="IncreaseDecreaseToLossOnContracts" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nvri_BusinessExitCostsExcludingSeverance" abstract="false" name="BusinessExitCostsExcludingSeverance" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nvri_DefinedBenefitPlanActuarialGainLossMember" abstract="true" name="DefinedBenefitPlanActuarialGainLossMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
</xs:schema>
