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  <xs:element id="ngl_FutureAmortizationOfDebtIssuanceCostsYearFour" abstract="false" name="FutureAmortizationOfDebtIssuanceCostsYearFour" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ngl_FutureAmortizationOfDebtIssuanceCostsYearFive" abstract="false" name="FutureAmortizationOfDebtIssuanceCostsYearFive" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="ngl_PurchaseObligationVolumeYearFive" abstract="false" name="PurchaseObligationVolumeYearFive" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:volumeItemType"/>
  <xs:element id="ngl_PurchaseObligationVolumeAfterYearFive" abstract="false" name="PurchaseObligationVolumeAfterYearFive" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:volumeItemType"/>
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  <xs:element id="ngl_SalesCommitmentsRemainderOfFiscalYear" abstract="false" name="SalesCommitmentsRemainderOfFiscalYear" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="ngl_VestingIn2028Member" abstract="true" name="VestingIn2028Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
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  <xs:element id="ngl_VestingIn2030Member" abstract="true" name="VestingIn2030Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
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  <xs:element id="ngl_OtherProductsOrServicesMember" abstract="true" name="OtherProductsOrServicesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
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</xs:schema>
