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  <xs:element id="hwkn_IndustrialSolutionsMember" abstract="true" name="IndustrialSolutionsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="hwkn_ManufacturedBlendedOrRepackagedProductsMember" abstract="true" name="ManufacturedBlendedOrRepackagedProductsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="hwkn_BulkProductsMember" abstract="true" name="BulkProductsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="hwkn_NutritionMember" abstract="true" name="NutritionMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="hwkn_FoodMember" abstract="true" name="FoodMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="hwkn_PharmaceuticalMember" abstract="true" name="PharmaceuticalMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="hwkn_AgriculturalMember" abstract="true" name="AgriculturalMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="hwkn_OtherMember" abstract="true" name="OtherMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="hwkn_WaterSolutionsMember" abstract="true" name="WaterSolutionsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="hwkn_RevolvingLoanFacilityLetterOfCredit" abstract="false" name="RevolvingLoanFacilityLetterOfCredit" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="hwkn_RevolvingLoanFacilitySwinglingSubfacility" abstract="false" name="RevolvingLoanFacilitySwinglingSubfacility" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="hwkn_Totaldebtnetofdebtissuancecosts" abstract="false" name="Totaldebtnetofdebtissuancecosts" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="hwkn_RestrictedStockActivityAbstract" abstract="true" name="RestrictedStockActivityAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="hwkn_NumberOfOperatingSegmentsAggregated" abstract="false" name="NumberOfOperatingSegmentsAggregated" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="hwkn_UnallocatedMember" abstract="true" name="UnallocatedMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="hwkn_IdentifiableAssets" abstract="false" name="IdentifiableAssets" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
</xs:schema>
