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  <xs:element id="snd_SmartSystemsMember" abstract="true" name="SmartSystemsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="snd_EmployeeStockPurchasePlanCompensation" abstract="false" name="EmployeeStockPurchasePlanCompensation" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="snd_ProceedsFromSaleOfOtherProductiveAssetsNetOfAdjustments" abstract="false" name="ProceedsFromSaleOfOtherProductiveAssetsNetOfAdjustments" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="snd_PaymentsForRepurchaseOfCommonStockFromRepurchaseProgram" abstract="false" name="PaymentsForRepurchaseOfCommonStockFromRepurchaseProgram" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="snd_ForfeitedDividends" abstract="false" name="ForfeitedDividends" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="snd_NoncashOrPartNoncashFixedAssetsPurchasedWithDebt" abstract="false" name="NoncashOrPartNoncashFixedAssetsPurchasedWithDebt" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="snd_AssetsAndLiabilitiesLesseeTableTextBlock" abstract="false" name="AssetsAndLiabilitiesLesseeTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="snd_BNSFMember" abstract="true" name="BNSFMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="snd_OakdaleWisconsinMember" abstract="true" name="OakdaleWisconsinMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="snd_OttawaIllinoisMember" abstract="true" name="OttawaIllinoisMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="snd_BlairWisconsinMember" abstract="true" name="BlairWisconsinMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="snd_CurrentAnnualProcessingCapacity" abstract="false" name="CurrentAnnualProcessingCapacity" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types1:massItemType"/>
  <xs:element id="snd_NumberOfMinesAndRelatedFacilitiesAcquired" abstract="false" name="NumberOfMinesAndRelatedFacilitiesAcquired" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="snd_AccountingPoliciesTable" abstract="true" name="AccountingPoliciesTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="snd_OtherRevenueDetailAxis" abstract="true" name="OtherRevenueDetailAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="snd_OtherRevenueDetailDomain" abstract="true" name="OtherRevenueDetailDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="snd_EmployeeRetentionCreditMember" abstract="true" name="EmployeeRetentionCreditMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="snd_AccountingPoliciesLineItems" abstract="true" name="AccountingPoliciesLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="snd_InventoryRawMaterialNet" abstract="false" name="InventoryRawMaterialNet" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="snd_InventoryWorkInProcessNet" abstract="false" name="InventoryWorkInProcessNet" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="snd_InventoryFinishedGoodsNet" abstract="false" name="InventoryFinishedGoodsNet" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="snd_InventorySparePartsNet" abstract="false" name="InventorySparePartsNet" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="snd_WellsiteStorageSolutionsMember" abstract="true" name="WellsiteStorageSolutionsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="snd_AccruedEquipmentExpense" abstract="false" name="AccruedEquipmentExpense" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="snd_AccruedFreightAndDeliveryChargesCurrent" abstract="false" name="AccruedFreightAndDeliveryChargesCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="snd_FirstCitizensBankMember" abstract="true" name="FirstCitizensBankMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="snd_LongTermDebtMaturityAfterYearFour" abstract="false" name="LongTermDebtMaturityAfterYearFour" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="snd_ABLRevolvingCreditFacilityMember" abstract="true" name="ABLRevolvingCreditFacilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
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  <xs:element id="snd_DebtInstrumentCovenantFixedChargeCoverageRatioMinimum" abstract="false" name="DebtInstrumentCovenantFixedChargeCoverageRatioMinimum" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="snd_LesseeLeaseAssets" abstract="false" name="LesseeLeaseAssets" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="snd_LesseeOperatingLeaseLiabilityToBePaidAfterYearFour" abstract="false" name="LesseeOperatingLeaseLiabilityToBePaidAfterYearFour" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="snd_FinanceLeaseLiabilityToBePaidAfterYearFour" abstract="false" name="FinanceLeaseLiabilityToBePaidAfterYearFour" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="snd_FinanceAndOperatingLeaseLiabilitiesPaymentDueAbstract" abstract="true" name="FinanceAndOperatingLeaseLiabilitiesPaymentDueAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="snd_FinanceAndOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear" abstract="false" name="FinanceAndOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="snd_FinanceAndOperatingLeaseLiabilityPaymentsDueYearTwo" abstract="false" name="FinanceAndOperatingLeaseLiabilityPaymentsDueYearTwo" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="snd_FinanceAndOperatingLeaseLiabilityPaymentsDueYearThree" abstract="false" name="FinanceAndOperatingLeaseLiabilityPaymentsDueYearThree" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="snd_FinanceAndOperatingLeaseLiabilityPaymentsDueYearFour" abstract="false" name="FinanceAndOperatingLeaseLiabilityPaymentsDueYearFour" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="snd_FinanceAndOperatingLeaseLiabilityPaymentsDueAfterYearFour" abstract="false" name="FinanceAndOperatingLeaseLiabilityPaymentsDueAfterYearFour" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="snd_FinanceAndOperatingLeaseLiabilityPaymentsDue" abstract="false" name="FinanceAndOperatingLeaseLiabilityPaymentsDue" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="snd_FinanceAndOperatingLeaseLiabilityUndiscountedExcessAmount" abstract="false" name="FinanceAndOperatingLeaseLiabilityUndiscountedExcessAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="snd_TradeAccountsPayablesMember" abstract="true" name="TradeAccountsPayablesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
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  <xs:element id="snd_PermitBondMember" abstract="true" name="PermitBondMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="snd_SegmentReportingNumberOfMajorCustomers" abstract="false" name="SegmentReportingNumberOfMajorCustomers" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="snd_SandSegmentMember" abstract="true" name="SandSegmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="snd_SmartSystemsSegmentMember" abstract="true" name="SmartSystemsSegmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="snd_LogisticsCosts" abstract="false" name="LogisticsCosts" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
</xs:schema>
