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        <BOYAmt>29646</BOYAmt>
        <EOYAmt>3617</EOYAmt>
      </AccountsPayableAccrExpnssGrp>
      <DeferredRevenueGrp>
        <BOYAmt>58705</BOYAmt>
        <EOYAmt>49825</EOYAmt>
      </DeferredRevenueGrp>
      <TotalLiabilitiesGrp>
        <BOYAmt>88351</BOYAmt>
        <EOYAmt>53442</EOYAmt>
      </TotalLiabilitiesGrp>
      <OrganizationFollowsFASB117Ind>X</OrganizationFollowsFASB117Ind>
      <NoDonorRestrictionNetAssetsGrp>
        <BOYAmt>628071</BOYAmt>
        <EOYAmt>671797</EOYAmt>
      </NoDonorRestrictionNetAssetsGrp>
      <TotalNetAssetsFundBalanceGrp>
        <BOYAmt>628071</BOYAmt>
        <EOYAmt>671797</EOYAmt>
      </TotalNetAssetsFundBalanceGrp>
      <TotLiabNetAssetsFundBalanceGrp>
        <BOYAmt>716422</BOYAmt>
        <EOYAmt>725239</EOYAmt>
      </TotLiabNetAssetsFundBalanceGrp>
      <InfoInScheduleOPartXIInd>X</InfoInScheduleOPartXIInd>
      <ReconcilationRevenueExpnssAmt>18778</ReconcilationRevenueExpnssAmt>
      <PriorPeriodAdjustmentsAmt>-6633</PriorPeriodAdjustmentsAmt>
      <OtherChangesInNetAssetsAmt>31581</OtherChangesInNetAssetsAmt>
      <MethodOfAccountingAccrualInd>X</MethodOfAccountingAccrualInd>
      <AccountantCompileOrReviewInd>false</AccountantCompileOrReviewInd>
      <FSAuditedInd>false</FSAuditedInd>
      <FederalGrantAuditRequiredInd>false</FederalGrantAuditRequiredInd>
    </IRS990>
    <IRS990ScheduleC documentId="990C">
      <SubstantiallyAllDuesNondedInd>false</SubstantiallyAllDuesNondedInd>
      <OnlyInHouseLobbyingInd>true</OnlyInHouseLobbyingInd>
      <AgreeCarryoverPriorYearInd>false</AgreeCarryoverPriorYearInd>
    </IRS990ScheduleC>
    <IRS990ScheduleF documentId="990F">
      <GrantRecordsMaintainedInd>true</GrantRecordsMaintainedInd>
      <AccountActivitiesOutsideUSGrp>
        <RegionTxt>Europe including Iceland and Greenland</RegionTxt>
        <TypeOfActivitiesConductedTxt>Grant making</TypeOfActivitiesConductedTxt>
        <SpecificServicesProvidedTxt>RESEARCH GRANT</SpecificServicesProvidedTxt>
        <RegionTotalExpendituresAmt>5721</RegionTotalExpendituresAmt>
      </AccountActivitiesOutsideUSGrp>
      <AccountActivitiesOutsideUSGrp>
        <RegionTxt>Europe including Iceland and Greenland</RegionTxt>
        <TypeOfActivitiesConductedTxt>Program services</TypeOfActivitiesConductedTxt>
        <SpecificServicesProvidedTxt>TECHNICAL CONSULTANT</SpecificServicesProvidedTxt>
        <RegionTotalExpendituresAmt>37800</RegionTotalExpendituresAmt>
      </AccountActivitiesOutsideUSGrp>
      <SubtotalSpentAmt>43521</SubtotalSpentAmt>
      <TotalSpentAmt>43521</TotalSpentAmt>
      <GrantsToOrgOutsideUSGrp>
        <RegionTxt>Europe including Iceland and Greenland</RegionTxt>
        <PurposeOfGrantTxt>RESEARCH FOR WATER RETENTION OF PERLITE</PurposeOfGrantTxt>
        <CashGrantAmt>5721</CashGrantAmt>
        <MannerOfCashDisbursementTxt>WIRE TRANSFER</MannerOfCashDisbursementTxt>
        <ValuationMethodUsedDesc>Book</ValuationMethodUsedDesc>
      </GrantsToOrgOutsideUSGrp>
      <TotalOtherOrgCnt>1</TotalOtherOrgCnt>
      <TransferToForeignCorpInd>false</TransferToForeignCorpInd>
      <InterestInForeignTrustInd>false</InterestInForeignTrustInd>
      <ForeignCorpOwnershipInd>false</ForeignCorpOwnershipInd>
      <PassiveForeignInvestmestCoInd>false</PassiveForeignInvestmestCoInd>
      <ForeignPartnershipInd>false</ForeignPartnershipInd>
      <BoycottCountriesInd>false</BoycottCountriesInd>
    </IRS990ScheduleF>
    <IRS990ScheduleO documentId="990O">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Amended return information</FormAndLineReferenceDesc>
        <ExplanationTxt>MEMBER PAID DUES TWICE IN 2022. AFTER 2022 RETURN WAS FILED, ERROR WAS DISCOVERED AND DUES MOVED TO 2023 INCOME BUT TAXPREPARER WAS NOT MADE AWARE. AMENDED RETURN ADJUSTS FUND BALANCE BY ($6633) AS A PRIOR PERIOD ADJUSTMENT TO ACCOUNT FOR SAME DUES RECORDED IN 2022 AND 2023. UNEARNED MEMBERSHIP WAS ADJUSTED TO ACTUAL 2024 DUES PAID IN 2023.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Management duties delegation Part VI line 3</FormAndLineReferenceDesc>
        <ExplanationTxt>CALABRESE MANAGEMENT IS HIRED TO PERFORM ALL ADMINISTRATIVE DUTIES. THE CONTRACT FOR MANAGEMENT IS REVIEWED WHEN THE CONTRACT IS UP FOR RENEWAL.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Members or stockholder classes and rights Part VI line 6</FormAndLineReferenceDesc>
        <ExplanationTxt>THERE ARE THREE MEMBERSHIP CATEGORIES: REGULAR MEMBERS ARE ANY ENTITY ENGAGED IN THE SALE OF PERLITE ORE, EXPANDED PERLITE, OR ENGAGED IN THE MANUAFACTER AND SALE OF PERLITE EXPANDING EQUIPMENT. ASSOCIATE MEMBERS IS ANY ENTITY ENGAGED IN THE MANUFACTURE OR SUPPLY OF PRODUCTS USING PERLITE. EDUCATOR MEMBERS ARE INDIVIDUALS WHO ARE STUDYING OR EMPLOYED AT AN ACCREDITED INSTITUTION. ONLY REGULAR MEMBERS HAVE THE RIGHT TO VOTE.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Member election for additional members Part VI line 7a</FormAndLineReferenceDesc>
        <ExplanationTxt>MEMBERSHIP VOTES ON THE ELECTION OF BOARD MEMBERS AT THE ANNUAL MEETING.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Governing body decisions Part VI line 7b</FormAndLineReferenceDesc>
        <ExplanationTxt>BY LAW CHANGES AND THE BOARD SLATE ARE VOTED ON BY MEMBERS, ALL OTHER DECISIONS ARE BY THE BOARD.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990 governing body review Part VI line 11</FormAndLineReferenceDesc>
        <ExplanationTxt>THE EXECUTIVE DIRECTOR, AS A NON-VOTING OFFICER OF THE BOARD, CAN SIGN THE TAX RETURN ON BEHALF OF THE ORGANIZATION PER THE BYLAWS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Conflict of interest policy compliance Part VI line 12c</FormAndLineReferenceDesc>
        <ExplanationTxt>A CONFLICT OF INTEREST POLICY IS APPROVED IN THE POLICY MANUAL. CONFLICT OF INTEREST AND DISCLOSURE STATEMENT ARE SIGNED BY EACH BOARD MEMBER AND KEPT ON FILE ANNUALLY.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>CEO executive director top management comp Part VI line 15a</FormAndLineReferenceDesc>
        <ExplanationTxt>THE BOARD OF DIRECTORS PERFORMS A REVIEW OF MANAGEMENT WHEN THE CONTRACT IS RENEWED. COMPENSATION IS SET DURING CONTRACT NEGOTIATION.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Governing documents etc available to public Part VI line 19</FormAndLineReferenceDesc>
        <ExplanationTxt>THE TAX FORM 990 IS AVAILABLE TO THE PUBLIC. GOVERNING DOCUMENTS, CONFLICT OF INTEREST POLICIES AND FINANCIAL STATEMENTS ARE AVAILABLE UPON REQUEST TO THE GENERAL PUBLIC.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Explanation of other changes in net assets or fund balances Part XI line 9</FormAndLineReferenceDesc>
        <ExplanationTxt>UNREALIZED GAIN ON MARKET VALUE OF INVESTMENTS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>List of other fees for services expenses Part IX line 11g</FormAndLineReferenceDesc>
        <ExplanationTxt>BONEFROG CREATIVE INC / WEBSITE UPDATES $3949DOVI SOLUTIONS / WEBSITE UPDATES $476KEITH BELL / GRAPHIC DESIGN $1375NONPROFIT WORDSMITHS / NEWSLETTER $885PANAGNIOTIS ANGELOPOLOS / TECHNICAL CONSULTANT $37800CHUCK VOGELSANG / TECHNICAL SPOKESPERSON $13000</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>General explanation attachment</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ORGANIZATION HAS ENTERED INTO A CONTRACT WITH A MANAGEMENT COMPANY. CALABRESE MANAGEMENT, INC., EIN: 25-1874170, HANDLES ALL MANAGEMENT, FINANCIAL, PROGRAM AND ADMINISTRATIVE DUTIES FOR THE ORGANIZATION. THE COMPANY AVERAGED 22 HOURS PER WEEK WORKING FOR PERLITE INSTITUTE IN 2023.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>