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        <FormAndLineReferenceDesc>Part I Line 7</FormAndLineReferenceDesc>
        <ExplanationTxt>Non-officers listed in Part VII, Section A, are eligible for incentive compensation under GTIs Management Incentive Plan. Recommended bonuses are calculated under the terms of the plan, and the actual incentive awarded must have the approval of the President of GTI. Officer incentive compensation is determined under the terms of the award, and the actual incentive awarded is subject to discretionary adjustment by, and the approval of, the Compensation Committee of the Board of Directors.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleJ>
    <IRS990ScheduleO documentId="990O" softwareId="14000292" softwareVersionNum="14.4.1.0">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section A, Line 6</FormAndLineReferenceDesc>
        <ExplanationTxt>GTIs members elect the members of its governing body, its board of directors. Members all have the same voting rights.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section A, Line 7a</FormAndLineReferenceDesc>
        <ExplanationTxt>Members have the right to annually elect one or more members of the board of directors. The organizations members all have the same voting rights.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section A, Line 7b</FormAndLineReferenceDesc>
        <ExplanationTxt>Changes to the organizations articles of incorporation require the approval of its members.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, Line 11b</FormAndLineReferenceDesc>
        <ExplanationTxt>The CFO reviews the Form 990 prior to its distribution to members of the governing body.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, Line 12c</FormAndLineReferenceDesc>
        <ExplanationTxt>GTI has a separate conflict of interest policy for its Board of Directors. Conflicts of interest must be reported immediately. If a conflict of interest is identified, it is discussed with the General Counsel to identify the proper course of remedial action. These actions may range from recusal in any business transactions involving GTI or the other interested organization, to withdrawing from involvement in the other organizations board of directors, to other actions that assure the conflict of interest, or even the appearance of a conflict of interest may be avoided. All GTI employees are covered by a separate written conflict of interest policy. Potential and actual employee conflicts of interest are reviewed by the General Counsel. All employees have the obligation to obtain the General Counsels prior written approval for all such activity. The failure to obtain the General Counsels prior written approval shall constitute grounds for immediate dismissal with cause. The directors annually complete a conflict of interest questionnaire. GTI employees annually complete a conflict of interest disclosure statement, and recertify compliance with the policy on a semi-monthly basis.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, Line 15</FormAndLineReferenceDesc>
        <ExplanationTxt>The positions that were reviewed included the President and CEO, Chief Financial Officer, General Counsel and Secretary, Vice President of Research Operations, Vice President of Corporate Development, Managing Director, Energy Conversion, and Managing Director, End Use Solutions. Annually, an outside company, CBIZ, determines the appropriate total compensation ranges for the above positions. A recommendation for merit increases and bonuses is made to the Compensation Committee of the Board of Directors, annually, based on the external market study performed by CBIZ, the companys performance, and the individuals performance. The Compensation Committee determines the final merit increase and bonus amounts. Merit increases and bonuses for both officers and managing directors are based on specific formulas which incorporate target amounts for each set of increases, and are increased or reduced companywide based on the direction of the Compensation Committee. The Compensation Committee specifically approves compensation for officers and reviews all compensation for managing directors as well. Their actions are detailed in the Compensation Committee minutes.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section C, Line 19</FormAndLineReferenceDesc>
        <ExplanationTxt>No documents available to the public.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part IX, Line 11g</FormAndLineReferenceDesc>
        <ExplanationTxt>Total of Other Services exceeds 10 of line 25 Col A, therefore, a list of the expenses follows Engineering and technical services - 11,399,218, Education and Training services - 791,918, Patent Maintenance services - 1,078,522, and Advocacy services 178,600.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
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          <BusinessNameLine1Txt>Endesco Clean Harbors LLC</BusinessNameLine1Txt>
        </RelatedOrganizationName>
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          <AddressLine1Txt>1700 S Mount Prospect Road</AddressLine1Txt>
          <CityNm>DesPlaines</CityNm>
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          <ZIPCd>60018</ZIPCd>
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        <PrimaryActivitiesTxt>Contractor/Consultant</PrimaryActivitiesTxt>
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          <BusinessNameLine1Txt>GRI International Inc</BusinessNameLine1Txt>
        </DirectControllingEntityName>
        <PredominantIncomeTypeTxt>Unrelated</PredominantIncomeTypeTxt>
        <ShareOfTotalIncomeAmt>-4738</ShareOfTotalIncomeAmt>
        <ShareOfEOYAssetsAmt>2175</ShareOfEOYAssetsAmt>
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        <GeneralOrManagingPartnerInd>false</GeneralOrManagingPartnerInd>
        <OwnershipPct>1.00000</OwnershipPct>
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      <IdRelatedOrgTxblPartnershipGrp>
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          <BusinessNameLine1Txt>Cement Lock Group LLC</BusinessNameLine1Txt>
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        <USAddress>
          <AddressLine1Txt>1700 S Mount Prospect Road</AddressLine1Txt>
          <CityNm>DesPlaines</CityNm>
          <StateAbbreviationCd>IL</StateAbbreviationCd>
          <ZIPCd>60018</ZIPCd>
        </USAddress>
        <EIN>364193651</EIN>
        <PrimaryActivitiesTxt>Contractor/consultant</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>DE</LegalDomicileStateCd>
        <DirectControllingEntityName>
          <BusinessNameLine1Txt>Endesco Services Inc</BusinessNameLine1Txt>
        </DirectControllingEntityName>
        <PredominantIncomeTypeTxt>Unrelated</PredominantIncomeTypeTxt>
        <ShareOfTotalIncomeAmt>26749</ShareOfTotalIncomeAmt>
        <ShareOfEOYAssetsAmt>990</ShareOfEOYAssetsAmt>
        <DisproportionateAllocationsInd>true</DisproportionateAllocationsInd>
        <GeneralOrManagingPartnerInd>false</GeneralOrManagingPartnerInd>
        <OwnershipPct>1.00000</OwnershipPct>
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      <IdRelatedOrgTxblPartnershipGrp>
        <RelatedOrganizationName>
          <BusinessNameLine1Txt>starline Trenchless Technology LLC</BusinessNameLine1Txt>
        </RelatedOrganizationName>
        <USAddress>
          <AddressLine1Txt>1700 S Mount Prospect Road</AddressLine1Txt>
          <CityNm>DesPlaines</CityNm>
          <StateAbbreviationCd>IL</StateAbbreviationCd>
          <ZIPCd>60018</ZIPCd>
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        <EIN>223647298</EIN>
        <PrimaryActivitiesTxt>Distribution</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>DE</LegalDomicileStateCd>
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          <BusinessNameLine1Txt>GRI International Inc</BusinessNameLine1Txt>
        </DirectControllingEntityName>
        <PredominantIncomeTypeTxt>Unrelated</PredominantIncomeTypeTxt>
        <ShareOfTotalIncomeAmt>11458</ShareOfTotalIncomeAmt>
        <ShareOfEOYAssetsAmt>286543</ShareOfEOYAssetsAmt>
        <DisproportionateAllocationsInd>false</DisproportionateAllocationsInd>
        <GeneralOrManagingPartnerInd>false</GeneralOrManagingPartnerInd>
        <OwnershipPct>0.33330</OwnershipPct>
      </IdRelatedOrgTxblPartnershipGrp>
      <IdRelatedOrgTxblCorpTrGrp>
        <RelatedOrganizationName>
          <BusinessNameLine1Txt>GTI International Inc</BusinessNameLine1Txt>
        </RelatedOrganizationName>
        <USAddress>
          <AddressLine1Txt>1700 S Mount Prospect</AddressLine1Txt>
          <CityNm>Des Plaines</CityNm>
          <StateAbbreviationCd>IL</StateAbbreviationCd>
          <ZIPCd>60018</ZIPCd>
        </USAddress>
        <EIN>364349614</EIN>
        <PrimaryActivitiesTxt>Product Commercialization</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>DE</LegalDomicileStateCd>
        <DirectControllingNACd>N/A</DirectControllingNACd>
        <EntityTypeTxt>C Corp</EntityTypeTxt>
        <ShareOfTotalIncomeAmt>-177113</ShareOfTotalIncomeAmt>
        <ShareOfEOYAssetsAmt>6712690</ShareOfEOYAssetsAmt>
        <OwnershipPct>1.00000</OwnershipPct>
        <ControlledOrganizationInd>false</ControlledOrganizationInd>
      </IdRelatedOrgTxblCorpTrGrp>
      <IdRelatedOrgTxblCorpTrGrp>
        <RelatedOrganizationName>
          <BusinessNameLine1Txt>Endesco Services Inc</BusinessNameLine1Txt>
        </RelatedOrganizationName>
        <USAddress>
          <AddressLine1Txt>1700 S Mount Prospect</AddressLine1Txt>
          <CityNm>Des Plaines</CityNm>
          <StateAbbreviationCd>IL</StateAbbreviationCd>
          <ZIPCd>60018</ZIPCd>
        </USAddress>
        <EIN>363177556</EIN>
        <PrimaryActivitiesTxt>Energy/Envrn Tech</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>IL</LegalDomicileStateCd>
        <DirectControllingNACd>N/A</DirectControllingNACd>
        <EntityTypeTxt>C Corp</EntityTypeTxt>
        <ShareOfTotalIncomeAmt>13642</ShareOfTotalIncomeAmt>
        <ShareOfEOYAssetsAmt>3370</ShareOfEOYAssetsAmt>
        <OwnershipPct>1.00000</OwnershipPct>
        <ControlledOrganizationInd>false</ControlledOrganizationInd>
      </IdRelatedOrgTxblCorpTrGrp>
      <IdRelatedOrgTxblCorpTrGrp>
        <RelatedOrganizationName>
          <BusinessNameLine1Txt>GTI Catoosa Test Facility Inc</BusinessNameLine1Txt>
        </RelatedOrganizationName>
        <USAddress>
          <AddressLine1Txt>1700 S Mount Prospect</AddressLine1Txt>
          <CityNm>Des Plaines</CityNm>
          <StateAbbreviationCd>IL</StateAbbreviationCd>
          <ZIPCd>60018</ZIPCd>
        </USAddress>
        <EIN>742914111</EIN>
        <PrimaryActivitiesTxt>Testing equipment</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>DE</LegalDomicileStateCd>
        <DirectControllingNACd>N/A</DirectControllingNACd>
        <EntityTypeTxt>S Corp</EntityTypeTxt>
        <ShareOfEOYAssetsAmt>32669</ShareOfEOYAssetsAmt>
        <OwnershipPct>1.00000</OwnershipPct>
        <ControlledOrganizationInd>false</ControlledOrganizationInd>
      </IdRelatedOrgTxblCorpTrGrp>
      <IdRelatedOrgTxblCorpTrGrp>
        <RelatedOrganizationName>
          <BusinessNameLine1Txt>CrystaTech Inc</BusinessNameLine1Txt>
        </RelatedOrganizationName>
        <USAddress>
          <AddressLine1Txt>1700 S Mount Prospect</AddressLine1Txt>
          <CityNm>Des Plaines</CityNm>
          <StateAbbreviationCd>IL</StateAbbreviationCd>
          <ZIPCd>60018</ZIPCd>
        </USAddress>
        <EIN>742964099</EIN>
        <PrimaryActivitiesTxt>Tech services</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>DE</LegalDomicileStateCd>
        <DirectControllingNACd>N/A</DirectControllingNACd>
        <EntityTypeTxt>C Corp</EntityTypeTxt>
        <ShareOfTotalIncomeAmt>78626</ShareOfTotalIncomeAmt>
        <ShareOfEOYAssetsAmt>272288</ShareOfEOYAssetsAmt>
        <OwnershipPct>0.78740</OwnershipPct>
        <ControlledOrganizationInd>false</ControlledOrganizationInd>
      </IdRelatedOrgTxblCorpTrGrp>
      <IdRelatedOrgTxblCorpTrGrp>
        <RelatedOrganizationName>
          <BusinessNameLine1Txt>Fisher-Nickel Inc</BusinessNameLine1Txt>
        </RelatedOrganizationName>
        <USAddress>
          <AddressLine1Txt>PO Box 1247</AddressLine1Txt>
          <CityNm>San Ramon</CityNm>
          <StateAbbreviationCd>CA</StateAbbreviationCd>
          <ZIPCd>94583</ZIPCd>
        </USAddress>
        <EIN>943300315</EIN>
        <PrimaryActivitiesTxt>Testing equipment</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>CA</LegalDomicileStateCd>
        <DirectControllingEntityName>
          <BusinessNameLine1Txt>GTI International Inc</BusinessNameLine1Txt>
        </DirectControllingEntityName>
        <EntityTypeTxt>C Corp</EntityTypeTxt>
        <ShareOfTotalIncomeAmt>3455126</ShareOfTotalIncomeAmt>
        <ShareOfEOYAssetsAmt>773256</ShareOfEOYAssetsAmt>
        <OwnershipPct>1.00000</OwnershipPct>
        <ControlledOrganizationInd>false</ControlledOrganizationInd>
      </IdRelatedOrgTxblCorpTrGrp>
      <IdRelatedOrgTxblCorpTrGrp>
        <RelatedOrganizationName>
          <BusinessNameLine1Txt>LocusView Solutions Inc</BusinessNameLine1Txt>
        </RelatedOrganizationName>
        <USAddress>
          <AddressLine1Txt>20 N Wacker Drive Suite 1200</AddressLine1Txt>
          <CityNm>Chicago</CityNm>
          <StateAbbreviationCd>IL</StateAbbreviationCd>
          <ZIPCd>60606</ZIPCd>
        </USAddress>
        <EIN>371754678</EIN>
        <PrimaryActivitiesTxt>Data processing</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>DE</LegalDomicileStateCd>
        <DirectControllingEntityName>
          <BusinessNameLine1Txt>GTI International Inc</BusinessNameLine1Txt>
        </DirectControllingEntityName>
        <EntityTypeTxt>C Corp</EntityTypeTxt>
        <ShareOfTotalIncomeAmt>192559</ShareOfTotalIncomeAmt>
        <ShareOfEOYAssetsAmt>297463</ShareOfEOYAssetsAmt>
        <OwnershipPct>1.00000</OwnershipPct>
        <ControlledOrganizationInd>false</ControlledOrganizationInd>
      </IdRelatedOrgTxblCorpTrGrp>
      <IdRelatedOrgTxblCorpTrGrp>
        <RelatedOrganizationName>
          <BusinessNameLine1Txt>CDH Energy Corporation</BusinessNameLine1Txt>
        </RelatedOrganizationName>
        <USAddress>
          <AddressLine1Txt>PO Box 641</AddressLine1Txt>
          <CityNm>Cazenovia</CityNm>
          <StateAbbreviationCd>NY</StateAbbreviationCd>
          <ZIPCd>13035</ZIPCd>
        </USAddress>
        <EIN>161461263</EIN>
        <PrimaryActivitiesTxt>Energy consulting</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>NY</LegalDomicileStateCd>
        <DirectControllingEntityName>
          <BusinessNameLine1Txt>GTI International Inc</BusinessNameLine1Txt>
        </DirectControllingEntityName>
        <EntityTypeTxt>C Corp</EntityTypeTxt>
        <ShareOfTotalIncomeAmt>2685730</ShareOfTotalIncomeAmt>
        <ShareOfEOYAssetsAmt>167286</ShareOfEOYAssetsAmt>
        <OwnershipPct>1.00000</OwnershipPct>
        <ControlledOrganizationInd>false</ControlledOrganizationInd>
      </IdRelatedOrgTxblCorpTrGrp>
      <ReceiptOfIntAnntsRntsRyltsInd>true</ReceiptOfIntAnntsRntsRyltsInd>
      <GiftGrntOrCapContriToOthOrgInd>true</GiftGrntOrCapContriToOthOrgInd>
      <GiftGrntCapContriFromOthOrgInd>false</GiftGrntCapContriFromOthOrgInd>
      <LoansOrGuaranteesToOtherOrgInd>true</LoansOrGuaranteesToOtherOrgInd>
      <LoansOrGuaranteesFromOthOrgInd>false</LoansOrGuaranteesFromOthOrgInd>
      <DivRelatedOrganizationInd>false</DivRelatedOrganizationInd>
      <AssetSaleToOtherOrgInd>false</AssetSaleToOtherOrgInd>
      <AssetPurchaseFromOtherOrgInd>false</AssetPurchaseFromOtherOrgInd>
      <AssetExchangeInd>false</AssetExchangeInd>
      <RentalOfFacilitiesToOthOrgInd>false</RentalOfFacilitiesToOthOrgInd>
      <RentalOfFcltsFromOthOrgInd>false</RentalOfFcltsFromOthOrgInd>
      <PerformOfServicesForOthOrgInd>true</PerformOfServicesForOthOrgInd>
      <PerformOfServicesByOtherOrgInd>true</PerformOfServicesByOtherOrgInd>
      <SharingOfFacilitiesInd>false</SharingOfFacilitiesInd>
      <PaidEmployeesSharingInd>false</PaidEmployeesSharingInd>
      <ReimbursementPaidToOtherOrgInd>true</ReimbursementPaidToOtherOrgInd>
      <ReimbursementPaidByOtherOrgInd>true</ReimbursementPaidByOtherOrgInd>
      <TransferToOtherOrgInd>false</TransferToOtherOrgInd>
      <TransferFromOtherOrgInd>true</TransferFromOtherOrgInd>
      <TransactionsRelatedOrgGrp>
        <OtherOrganizationName>
          <BusinessNameLine1Txt>Fisher-Nickel Inc</BusinessNameLine1Txt>
        </OtherOrganizationName>
        <TransactionTypeTxt>a</TransactionTypeTxt>
        <InvolvedAmt>6901</InvolvedAmt>
        <MethodOfAmountDeterminationTxt>Interest specified in note</MethodOfAmountDeterminationTxt>
      </TransactionsRelatedOrgGrp>
      <TransactionsRelatedOrgGrp>
        <OtherOrganizationName>
          <BusinessNameLine1Txt>Fisher-Nickel Inc</BusinessNameLine1Txt>
        </OtherOrganizationName>
        <TransactionTypeTxt>d</TransactionTypeTxt>
        <InvolvedAmt>200000</InvolvedAmt>
        <MethodOfAmountDeterminationTxt>Cash transferred</MethodOfAmountDeterminationTxt>
      </TransactionsRelatedOrgGrp>
      <TransactionsRelatedOrgGrp>
        <OtherOrganizationName>
          <BusinessNameLine1Txt>Fisher-Nickel Inc</BusinessNameLine1Txt>
        </OtherOrganizationName>
        <TransactionTypeTxt>s</TransactionTypeTxt>
        <InvolvedAmt>200000</InvolvedAmt>
        <MethodOfAmountDeterminationTxt>Loan repayment amount</MethodOfAmountDeterminationTxt>
      </TransactionsRelatedOrgGrp>
      <TransactionsRelatedOrgGrp>
        <OtherOrganizationName>
          <BusinessNameLine1Txt>Fisher-Nickel Inc</BusinessNameLine1Txt>
        </OtherOrganizationName>
        <TransactionTypeTxt>l</TransactionTypeTxt>
        <InvolvedAmt>70211</InvolvedAmt>
        <MethodOfAmountDeterminationTxt>See Part VII Note 1</MethodOfAmountDeterminationTxt>
      </TransactionsRelatedOrgGrp>
      <TransactionsRelatedOrgGrp>
        <OtherOrganizationName>
          <BusinessNameLine1Txt>GTI International Inc</BusinessNameLine1Txt>
        </OtherOrganizationName>
        <TransactionTypeTxt>b</TransactionTypeTxt>
        <InvolvedAmt>2620500</InvolvedAmt>
        <MethodOfAmountDeterminationTxt>Cash transferred</MethodOfAmountDeterminationTxt>
      </TransactionsRelatedOrgGrp>
      <TransactionsRelatedOrgGrp>
        <OtherOrganizationName>
          <BusinessNameLine1Txt>LocusView Solutions Inc</BusinessNameLine1Txt>
        </OtherOrganizationName>
        <TransactionTypeTxt>a</TransactionTypeTxt>
        <InvolvedAmt>2621</InvolvedAmt>
        <MethodOfAmountDeterminationTxt>interest specified in note</MethodOfAmountDeterminationTxt>
      </TransactionsRelatedOrgGrp>
      <TransactionsRelatedOrgGrp>
        <OtherOrganizationName>
          <BusinessNameLine1Txt>LocusView Solutions Inc</BusinessNameLine1Txt>
        </OtherOrganizationName>
        <TransactionTypeTxt>d</TransactionTypeTxt>
        <InvolvedAmt>385000</InvolvedAmt>
        <MethodOfAmountDeterminationTxt>Cash transferred</MethodOfAmountDeterminationTxt>
      </TransactionsRelatedOrgGrp>
      <TransactionsRelatedOrgGrp>
        <OtherOrganizationName>
          <BusinessNameLine1Txt>LocusView Solutions Inc</BusinessNameLine1Txt>
        </OtherOrganizationName>
        <TransactionTypeTxt>l</TransactionTypeTxt>
        <InvolvedAmt>259753</InvolvedAmt>
        <MethodOfAmountDeterminationTxt>See Part VII Note 2</MethodOfAmountDeterminationTxt>
      </TransactionsRelatedOrgGrp>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part V Line 24</FormAndLineReferenceDesc>
        <ExplanationTxt>The fair value of the administrative and technical indirect services performed for the related organization was determined using GTIs actual cost of labor, the actual fringe rate for the year, and 7 of the labor cost plus fringe. The fair value of technical services performed under a customer project of the related organization was determined using GTIs actual cost, plus fringe and indirects at the government approved provisional indirect rates.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part V Line Line 28</FormAndLineReferenceDesc>
        <ExplanationTxt>The fair value of the administrative services performed for the related organization was determined using GTIs actual cost of labor, the actual fringe rate for the year, and 7 of the labor cost plus fringe. The fair value of technical services performed under a customer project of the related organization was determined using GTIs standard commercial billing rates for fiscal year 2014.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleR>
  </ReturnData>
</Return>