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    <ReturnTs>2020-09-30T15:35:35-05:00</ReturnTs>
    <TaxPeriodEndDt>2019-12-31</TaxPeriodEndDt>
    <PreparerFirmGrp>
      <PreparerFirmName>
        <BusinessNameLine1Txt>Foundation Source</BusinessNameLine1Txt>
      </PreparerFirmName>
      <PreparerUSAddress>
        <AddressLine1Txt>One Hollow Ln Ste 212</AddressLine1Txt>
        <CityNm>Lake Success</CityNm>
        <StateAbbreviationCd>NY</StateAbbreviationCd>
        <ZIPCd>11042</ZIPCd>
      </PreparerUSAddress>
    </PreparerFirmGrp>
    <ReturnTypeCd>990PF</ReturnTypeCd>
    <TaxPeriodBeginDt>2019-01-01</TaxPeriodBeginDt>
    <Filer>
      <EIN>825225751</EIN>
      <BusinessName>
        <BusinessNameLine1Txt>Ron and Martha Doornink Foundation</BusinessNameLine1Txt>
      </BusinessName>
      <InCareOfNm>% Foundation Source</InCareOfNm>
      <BusinessNameControlTxt>RONA</BusinessNameControlTxt>
      <PhoneNum>8008391754</PhoneNum>
      <USAddress>
        <AddressLine1Txt>Foundation Source 501 Silverside Rd</AddressLine1Txt>
        <CityNm>Wilmington</CityNm>
        <StateAbbreviationCd>DE</StateAbbreviationCd>
        <ZIPCd>198091377</ZIPCd>
      </USAddress>
    </Filer>
    <BusinessOfficerGrp>
      <PersonNm>RONALD DOOMINK</PersonNm>
      <PersonTitleTxt>president</PersonTitleTxt>
      <PhoneNum>8008391754</PhoneNum>
      <SignatureDt>2020-09-16</SignatureDt>
      <DiscussWithPaidPreparerInd>true</DiscussWithPaidPreparerInd>
    </BusinessOfficerGrp>
    <PreparerPersonGrp>
      <PreparerPersonNm>Jeffrey D Haskell</PreparerPersonNm>
      <PTIN>P01345770</PTIN>
      <PhoneNum>8008391754</PhoneNum>
    </PreparerPersonGrp>
    <FilingSecurityInformation>
      <IPAddress>
        <IPv4AddressTxt>67.82.234.252</IPv4AddressTxt>
      </IPAddress>
      <FederalOriginalSubmissionId>06391520202745000027</FederalOriginalSubmissionId>
      <FederalOriginalSubmissionIdDt>2020-09-30</FederalOriginalSubmissionIdDt>
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    <TaxYr>2019</TaxYr>
    <BuildTS>2021-04-22 16:20:28Z</BuildTS>
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      <FMVAssetsEOYAmt>379808</FMVAssetsEOYAmt>
      <MethodOfAccountingCashInd>X</MethodOfAccountingCashInd>
      <AnalysisOfRevenueAndExpenses>
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        <InterestOnSavRevAndExpnssAmt>29</InterestOnSavRevAndExpnssAmt>
        <InterestOnSavNetInvstIncmAmt>29</InterestOnSavNetInvstIncmAmt>
        <CapGainNetIncmNetInvstIncmAmt>0</CapGainNetIncmNetInvstIncmAmt>
        <TotalRevAndExpnssAmt>10029</TotalRevAndExpnssAmt>
        <TotalNetInvstIncmAmt>29</TotalNetInvstIncmAmt>
        <CompOfcrDirTrstRevAndExpnssAmt>0</CompOfcrDirTrstRevAndExpnssAmt>
        <OtherExpensesRevAndExpnssAmt referenceDocumentId="OtherExpensesSch">8795</OtherExpensesRevAndExpnssAmt>
        <OtherExpensesDsbrsChrtblAmt>8795</OtherExpensesDsbrsChrtblAmt>
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        <ContriPaidRevAndExpnssAmt>0</ContriPaidRevAndExpnssAmt>
        <ContriPaidDsbrsChrtblAmt>0</ContriPaidDsbrsChrtblAmt>
        <TotalExpensesRevAndExpnssAmt>8795</TotalExpensesRevAndExpnssAmt>
        <TotalExpensesNetInvstIncmAmt>0</TotalExpensesNetInvstIncmAmt>
        <TotalExpensesDsbrsChrtblAmt>8795</TotalExpensesDsbrsChrtblAmt>
        <ExcessRevenueOverExpensesAmt>1234</ExcessRevenueOverExpensesAmt>
        <NetInvestmentIncomeAmt>29</NetInvestmentIncomeAmt>
      </AnalysisOfRevenueAndExpenses>
      <Form990PFBalanceSheetsGrp>
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        <SavAndTempCashInvstEOYAmt>1808</SavAndTempCashInvstEOYAmt>
        <SavAndTempCashInvstEOYFMVAmt>1808</SavAndTempCashInvstEOYFMVAmt>
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        <CorporateStockEOYAmt referenceDocumentId="InvestCorpStockSch">685100</CorporateStockEOYAmt>
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        <TotalAssetsBOYAmt>685674</TotalAssetsBOYAmt>
        <TotalAssetsEOYAmt>686908</TotalAssetsEOYAmt>
        <TotalAssetsEOYFMVAmt>379808</TotalAssetsEOYFMVAmt>
        <TotalLiabilitiesBOYAmt>0</TotalLiabilitiesBOYAmt>
        <TotalLiabilitiesEOYAmt>0</TotalLiabilitiesEOYAmt>
        <OrgDoesNotFollowFASB117Ind>X</OrgDoesNotFollowFASB117Ind>
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        <TotalLiabilitiesNetAstBOYAmt>685674</TotalLiabilitiesNetAstBOYAmt>
        <TotalLiabilitiesNetAstEOYAmt>686908</TotalLiabilitiesNetAstEOYAmt>
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        <ExcessRevenueOverExpensesAmt>1234</ExcessRevenueOverExpensesAmt>
        <SubtotalAmt>686908</SubtotalAmt>
        <TotNetAstOrFundBalancesEOYAmt>686908</TotNetAstOrFundBalancesEOYAmt>
      </ChgInNetAssetsFundBalancesGrp>
      <CapGainsLossTxInvstIncmDetail />
      <QlfyUndSect4940eReducedTaxGrp>
        <LiableSection4942TaxInd>false</LiableSection4942TaxInd>
        <AdjustedQlfyDistriYr1Amt>9433</AdjustedQlfyDistriYr1Amt>
        <NetVlNoncharitableAssetsYr1Amt>148100</NetVlNoncharitableAssetsYr1Amt>
        <DistributionYr1Rt>0.063693</DistributionYr1Rt>
        <AdjustedQlfyDistriYr2Amt>0</AdjustedQlfyDistriYr2Amt>
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        <DistributionYr2Rt>0.0</DistributionYr2Rt>
        <AdjustedQlfyDistriYr3Amt>0</AdjustedQlfyDistriYr3Amt>
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        <DistributionYr3Rt>0.0</DistributionYr3Rt>
        <AdjustedQlfyDistriYr4Amt>0</AdjustedQlfyDistriYr4Amt>
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        <AdjustedQlfyDistriYr5Amt>0</AdjustedQlfyDistriYr5Amt>
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        <AverageDistributionRt>0.063693</AverageDistributionRt>
        <NetVlNoncharitableAssetsAmt>436805</NetVlNoncharitableAssetsAmt>
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        <AdjNonchrtblNetInvstIncmPctAmt>27821</AdjNonchrtblNetInvstIncmPctAmt>
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        <TotalPaymentsAndCreditsAmt>1</TotalPaymentsAndCreditsAmt>
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        <MoreThan100SpentInd>false</MoreThan100SpentInd>
        <Form1120POLFiledInd>false</Form1120POLFiledInd>
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        <ChangesToArticlesOrBylawsInd>false</ChangesToArticlesOrBylawsInd>
        <UnrelatedBusIncmOverLimitInd>false</UnrelatedBusIncmOverLimitInd>
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        <Section508eRqrSatisfiedInd>true</Section508eRqrSatisfiedInd>
        <AtLeast5000InAssetsInd>true</AtLeast5000InAssetsInd>
        <OrgReportOrRegisterStateCd>DE</OrgReportOrRegisterStateCd>
        <Form990PFFiledWithAttyGenInd>true</Form990PFFiledWithAttyGenInd>
        <PrivateOperatingFoundationInd>false</PrivateOperatingFoundationInd>
        <NewSubstantialContributorsInd>false</NewSubstantialContributorsInd>
        <OwnControlledEntityInd>false</OwnControlledEntityInd>
        <DonorAdvisedFundInd>false</DonorAdvisedFundInd>
        <ComplyWithPublicInspRqrInd>true</ComplyWithPublicInspRqrInd>
        <PersonsWithBooksName>
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        <LocationOfBooksUSAddress>
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          <CityNm>Wilmington</CityNm>
          <StateAbbreviationCd>DE</StateAbbreviationCd>
          <ZIPCd>198091377</ZIPCd>
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        <ForeignAccountsQuestionInd>false</ForeignAccountsQuestionInd>
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        <BrrwOrLendDisqualifiedPrsnInd>false</BrrwOrLendDisqualifiedPrsnInd>
        <FurnGoodsDisqualifiedPrsnInd>false</FurnGoodsDisqualifiedPrsnInd>
        <PayCompDisqualifiedPrsnInd>false</PayCompDisqualifiedPrsnInd>
        <TransferAstDisqualifiedPrsnInd>false</TransferAstDisqualifiedPrsnInd>
        <PaymentToGovernmentOfficialInd>false</PaymentToGovernmentOfficialInd>
        <UncorrectedPriorActsInd>false</UncorrectedPriorActsInd>
        <UndistributedIncomePYInd>false</UndistributedIncomePYInd>
        <BusinessHoldingsInd>false</BusinessHoldingsInd>
        <JeopardyInvestmentsInd>false</JeopardyInvestmentsInd>
        <UncorrectedPYJeopardyInvstInd>false</UncorrectedPYJeopardyInvstInd>
        <InfluenceLegislationInd>false</InfluenceLegislationInd>
        <InfluenceElectionInd>false</InfluenceElectionInd>
        <GrantsToIndividualsInd>false</GrantsToIndividualsInd>
        <GrantsToOrganizationsInd>false</GrantsToOrganizationsInd>
        <NoncharitablePurposeInd>false</NoncharitablePurposeInd>
        <RcvFndsToPayPrsnlBnftCntrctInd>false</RcvFndsToPayPrsnlBnftCntrctInd>
        <PayPremiumsPrsnlBnftCntrctInd>false</PayPremiumsPrsnlBnftCntrctInd>
        <ProhibitedTaxShelterTransInd>false</ProhibitedTaxShelterTransInd>
        <SubjToTaxRmnrtnExPrchtPymtInd>false</SubjToTaxRmnrtnExPrchtPymtInd>
      </StatementsRegardingActy4720Grp>
      <OfficerDirTrstKeyEmplInfoGrp>
        <OfficerDirTrstKeyEmplGrp>
          <PersonNm>Ronald Doornink</PersonNm>
          <USAddress>
            <AddressLine1Txt>Foundation Source 501 Silverside Rd</AddressLine1Txt>
            <CityNm>Wilmington</CityNm>
            <StateAbbreviationCd>DE</StateAbbreviationCd>
            <ZIPCd>198091377</ZIPCd>
          </USAddress>
          <TitleTxt>Dir, Pres, Sec, Treas</TitleTxt>
          <AverageHrsPerWkDevotedToPosRt>1.0</AverageHrsPerWkDevotedToPosRt>
          <CompensationAmt>0</CompensationAmt>
          <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
          <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
        </OfficerDirTrstKeyEmplGrp>
      </OfficerDirTrstKeyEmplInfoGrp>
      <SummaryOfDirectChrtblActyGrp />
      <SumOfProgramRelatedInvstGrp />
      <MinimumInvestmentReturnGrp>
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        <AverageMonthlyCashBalancesAmt>5057</AverageMonthlyCashBalancesAmt>
        <FMVAllOtherNoncharitableAstAmt>0</FMVAllOtherNoncharitableAstAmt>
        <TotalFMVOfUnusedAssetsAmt>443457</TotalFMVOfUnusedAssetsAmt>
        <AcquisitionIndebtednessAmt>0</AcquisitionIndebtednessAmt>
        <AdjustedTotalFMVOfUnusedAstAmt>443457</AdjustedTotalFMVOfUnusedAstAmt>
        <CashDeemedCharitableAmt>6652</CashDeemedCharitableAmt>
        <NetVlNoncharitableAssetsAmt>436805</NetVlNoncharitableAssetsAmt>
        <MinimumInvestmentReturnAmt>21840</MinimumInvestmentReturnAmt>
      </MinimumInvestmentReturnGrp>
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        <AdjustedQualifyingDistriAmt>8795</AdjustedQualifyingDistriAmt>
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        <PriorYear2Yr>2016</PriorYear2Yr>
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      <PrivateOperatingFoundationsGrp></PrivateOperatingFoundationsGrp>
      <SupplementaryInformationGrp>
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        <OnlyContriToPreselectedInd>X</OnlyContriToPreselectedInd>
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        <MembershipDuesAndAssmntGrp />
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        <NetRntlIncmReNotDebtFincdProp />
        <NetRentalIncomePersonalPropGrp />
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        <ReimbursementArrangementsInd>false</ReimbursementArrangementsInd>
        <LoansOrLoanGuaranteesInd>false</LoansOrLoanGuaranteesInd>
        <PerformanceOfServicesEtcInd>false</PerformanceOfServicesEtcInd>
        <SharingOfFacilitiesEtcInd>false</SharingOfFacilitiesEtcInd>
        <RelationshipsNonchrtblEOInd>false</RelationshipsNonchrtblEOInd>
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      <GeneralRuleInd>X</GeneralRuleInd>
      <ContributorInformationGrp>
        <ContributorNum>1</ContributorNum>
        <ContributorPersonNm>Doornink Revocable Living Trust</ContributorPersonNm>
        <ContributorUSAddress>
          <AddressLine1Txt>1321 UPLAND DRIVE UNIT 4063</AddressLine1Txt>
          <CityNm>Houston</CityNm>
          <StateAbbreviationCd>TX</StateAbbreviationCd>
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      </OtherExpensesScheduleGrp>
      <OtherExpensesScheduleGrp>
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        <DisbursementsCharitablePrpsAmt>25</DisbursementsCharitablePrpsAmt>
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    </OtherExpensesSchedule>
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