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        <AddressLine1>1700 S Mount Prospect Road</AddressLine1>
        <City>Des Plaines</City>
        <State>IL</State>
        <ZIPCode>600181804</ZIPCode>
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      <Name>James F Ingold</Name>
      <Title>VP Finance Treas CFO</Title>
      <DateSigned>2013-11-12</DateSigned>
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        <SpecificServicesProvided>Scientific research</SpecificServicesProvided>
        <TotalExpenditures>63848</TotalExpenditures>
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        <TypeOfActivitiesConducted>Indirect management activity</TypeOfActivitiesConducted>
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        <Region>East Asia and the Pacific</Region>
        <TypeOfActivitiesConducted>Unrelated trade or business</TypeOfActivitiesConducted>
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        <SpecificServicesProvided>Scientific research</SpecificServicesProvided>
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      <AcctsActvsOutUSTable>
        <Region>North America</Region>
        <TypeOfActivitiesConducted>Indirect management activity</TypeOfActivitiesConducted>
        <TotalExpenditures>9249</TotalExpenditures>
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      <AcctsActvsOutUSTable>
        <Region>North America</Region>
        <TypeOfActivitiesConducted>Unrelated trade or business</TypeOfActivitiesConducted>
        <TotalExpenditures>1817</TotalExpenditures>
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      <AcctsActvsOutUSTable>
        <Region>South America</Region>
        <TypeOfActivitiesConducted>Program Services</TypeOfActivitiesConducted>
        <SpecificServicesProvided>Scientific research</SpecificServicesProvided>
        <TotalExpenditures>1374</TotalExpenditures>
      </AcctsActvsOutUSTable>
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      <TotalAmountSpent>260406</TotalAmountSpent>
      <TransferToForeignCorp>false</TransferToForeignCorp>
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      <OwnForeignCorp>true</OwnForeignCorp>
      <PassiveForeignInvestCo>false</PassiveForeignInvestCo>
      <ForeignPartnership>false</ForeignPartnership>
      <BoycottCountries>false</BoycottCountries>
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      <ClubDuesOrFees>X</ClubDuesOrFees>
      <WrittenPolicyReTAndEExpenses>true</WrittenPolicyReTAndEExpenses>
      <SubstantiationRequired>true</SubstantiationRequired>
      <CompensationCommittee>X</CompensationCommittee>
      <IndependentConsultant>X</IndependentConsultant>
      <WrittenEmploymentContract>X</WrittenEmploymentContract>
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      <SupplementalNonqualRetirePlan>false</SupplementalNonqualRetirePlan>
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        <NamePerson>Mr David C Carroll</NamePerson>
        <Title>President CEO</Title>
        <BaseCompensationFilingOrg>380042</BaseCompensationFilingOrg>
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        <OtherCompensationFilingOrg>14842</OtherCompensationFilingOrg>
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        <NamePerson>Mr Paul G Chromek</NamePerson>
        <Title>General Counsel Secretary</Title>
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        <BonusFilingOrg>63630</BonusFilingOrg>
        <OtherCompensationFilingOrg>4903</OtherCompensationFilingOrg>
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        <NamePerson>Mr John J Lewnard</NamePerson>
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        <BaseCompensationFilingOrg>199654</BaseCompensationFilingOrg>
        <BonusFilingOrg>73625</BonusFilingOrg>
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        <NamePerson>Mr Ronald N Snedic</NamePerson>
        <Title>VP Corporate Development</Title>
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        <BonusFilingOrg>80695</BonusFilingOrg>
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        <NontaxableBenefitsFilingOrg>8272</NontaxableBenefitsFilingOrg>
        <TotalCompensationFilingOrg>155302</TotalCompensationFilingOrg>
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      <Form990ScheduleJPartII>
        <NamePerson>Mr Vann Bush</NamePerson>
        <Title>M.D. Energy Conversion</Title>
        <BaseCompensationFilingOrg>182928</BaseCompensationFilingOrg>
        <BonusFilingOrg>44416</BonusFilingOrg>
        <OtherCompensationFilingOrg>2452</OtherCompensationFilingOrg>
        <DeferredCompFilingOrg>61496</DeferredCompFilingOrg>
        <NontaxableBenefitsFilingOrg>17138</NontaxableBenefitsFilingOrg>
        <TotalCompensationFilingOrg>308430</TotalCompensationFilingOrg>
      </Form990ScheduleJPartII>
      <Form990ScheduleJPartII>
        <NamePerson>Mr Eddie Johnston</NamePerson>
        <Title>VP Research Operations</Title>
        <BaseCompensationFilingOrg>184775</BaseCompensationFilingOrg>
        <BonusFilingOrg>68000</BonusFilingOrg>
        <OtherCompensationFilingOrg>1239</OtherCompensationFilingOrg>
        <DeferredCompFilingOrg>79481</DeferredCompFilingOrg>
        <NontaxableBenefitsFilingOrg>17738</NontaxableBenefitsFilingOrg>
        <TotalCompensationFilingOrg>351233</TotalCompensationFilingOrg>
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      <Form990ScheduleJPartII>
        <NamePerson>Mr Willam Liss</NamePerson>
        <Title>M.D. End Use Solutions</Title>
        <BaseCompensationFilingOrg>164976</BaseCompensationFilingOrg>
        <BonusFilingOrg>47305</BonusFilingOrg>
        <OtherCompensationFilingOrg>1252</OtherCompensationFilingOrg>
        <DeferredCompFilingOrg>73589</DeferredCompFilingOrg>
        <NontaxableBenefitsFilingOrg>25120</NontaxableBenefitsFilingOrg>
        <TotalCompensationFilingOrg>312242</TotalCompensationFilingOrg>
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        <NamePerson>Mr Bruce Bryan</NamePerson>
        <Title>RD Director</Title>
        <BaseCompensationFilingOrg>145982</BaseCompensationFilingOrg>
        <BonusFilingOrg>53230</BonusFilingOrg>
        <OtherCompensationFilingOrg>2767</OtherCompensationFilingOrg>
        <DeferredCompFilingOrg>61017</DeferredCompFilingOrg>
        <NontaxableBenefitsFilingOrg>7641</NontaxableBenefitsFilingOrg>
        <TotalCompensationFilingOrg>270637</TotalCompensationFilingOrg>
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        <NamePerson>Mr Tony Lindsay</NamePerson>
        <Title>RD Director</Title>
        <BaseCompensationFilingOrg>148282</BaseCompensationFilingOrg>
        <BonusFilingOrg>54906</BonusFilingOrg>
        <OtherCompensationFilingOrg>1155</OtherCompensationFilingOrg>
        <DeferredCompFilingOrg>41142</DeferredCompFilingOrg>
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        <TotalCompensationFilingOrg>262885</TotalCompensationFilingOrg>
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        <NamePerson>Mr Mark Fejer</NamePerson>
        <Title>Chief Patent Counsel</Title>
        <BaseCompensationFilingOrg>177616</BaseCompensationFilingOrg>
        <BonusFilingOrg>21006</BonusFilingOrg>
        <OtherCompensationFilingOrg>5455</OtherCompensationFilingOrg>
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        <NontaxableBenefitsFilingOrg>17265</NontaxableBenefitsFilingOrg>
        <TotalCompensationFilingOrg>360018</TotalCompensationFilingOrg>
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        <NamePerson>Mr Quinton Ford</NamePerson>
        <Title>Dir. Contracting and Legal Affairs</Title>
        <BaseCompensationFilingOrg>141484</BaseCompensationFilingOrg>
        <BonusFilingOrg>54838</BonusFilingOrg>
        <OtherCompensationFilingOrg>46446</OtherCompensationFilingOrg>
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        <TotalCompensationFilingOrg>304774</TotalCompensationFilingOrg>
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        <NamePerson>Mr Neil P Leslie</NamePerson>
        <Title>RD Director</Title>
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        <BonusFilingOrg>20557</BonusFilingOrg>
        <OtherCompensationFilingOrg>2779</OtherCompensationFilingOrg>
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        <NamePerson>Mr Daniel Ersoy</NamePerson>
        <Title>RD Executive Director</Title>
        <BaseCompensationFilingOrg>161624</BaseCompensationFilingOrg>
        <BonusFilingOrg>66251</BonusFilingOrg>
        <OtherCompensationFilingOrg>1306</OtherCompensationFilingOrg>
        <DeferredCompFilingOrg>58257</DeferredCompFilingOrg>
        <NontaxableBenefitsFilingOrg>10352</NontaxableBenefitsFilingOrg>
        <TotalCompensationFilingOrg>297790</TotalCompensationFilingOrg>
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        <NamePerson>Mr Rodney C Rinholm</NamePerson>
        <Title>Executive Director, Business Development</Title>
        <BaseCompensationFilingOrg>157045</BaseCompensationFilingOrg>
        <BonusFilingOrg>26225</BonusFilingOrg>
        <OtherCompensationFilingOrg>1422</OtherCompensationFilingOrg>
        <DeferredCompFilingOrg>62278</DeferredCompFilingOrg>
        <NontaxableBenefitsFilingOrg>16223</NontaxableBenefitsFilingOrg>
        <TotalCompensationFilingOrg>263193</TotalCompensationFilingOrg>
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        <NamePerson>Ms Barbara E Weber</NamePerson>
        <Title>Executive Director, Human Resources</Title>
        <BaseCompensationFilingOrg>157893</BaseCompensationFilingOrg>
        <BonusFilingOrg>22771</BonusFilingOrg>
        <OtherCompensationFilingOrg>3742</OtherCompensationFilingOrg>
        <DeferredCompFilingOrg>126143</DeferredCompFilingOrg>
        <NontaxableBenefitsFilingOrg>17401</NontaxableBenefitsFilingOrg>
        <TotalCompensationFilingOrg>327950</TotalCompensationFilingOrg>
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      <Form990ScheduleJPartIII>
        <Identifier>I</Identifier>
        <ReturnReference>1a</ReturnReference>
        <Explanation>GTI requires prior written approval of the President and CEO or the VP of Finance, Treasurer and CFO in order to reimburse any costs related to a spouse accompanying a staff member on a business trip. GTI reimburses all employees up to 200 per year for health club dues substantiated by a receipt.</Explanation>
      </Form990ScheduleJPartIII>
      <Form990ScheduleJPartIII>
        <Identifier>I</Identifier>
        <ReturnReference>7</ReturnReference>
        <Explanation>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.</Explanation>
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          <NameBusiness>
            <BusinessNameLine1>The Williams Companies Inc</BusinessNameLine1>
          </NameBusiness>
        </NameOfInterestedPerson>
        <Relationship>GTI director is an officer of company</Relationship>
        <AmountOfTransaction>108000</AmountOfTransaction>
        <DescriptionOfTransaction>GTI research project funding</DescriptionOfTransaction>
        <SharingOfRevenues>false</SharingOfRevenues>
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      <Form990ScheduleLPartIV>
        <NameOfInterestedPerson>
          <NameBusiness>
            <BusinessNameLine1>The Williams Companies Inc</BusinessNameLine1>
          </NameBusiness>
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        <Relationship>GTI director is an officer of company</Relationship>
        <AmountOfTransaction>3104</AmountOfTransaction>
        <DescriptionOfTransaction>GTI Education classes</DescriptionOfTransaction>
        <SharingOfRevenues>false</SharingOfRevenues>
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      <Form990ScheduleLPartIV>
        <NameOfInterestedPerson>
          <NameBusiness>
            <BusinessNameLine1>Washington Gas</BusinessNameLine1>
          </NameBusiness>
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        <Relationship>GTI director is an officer of company</Relationship>
        <AmountOfTransaction>100000</AmountOfTransaction>
        <DescriptionOfTransaction>GTI Sustaining Membership Program</DescriptionOfTransaction>
        <SharingOfRevenues>false</SharingOfRevenues>
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        <NameOfInterestedPerson>
          <NameBusiness>
            <BusinessNameLine1>Washington Gas</BusinessNameLine1>
          </NameBusiness>
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        <Relationship>GTI director is an officer of company</Relationship>
        <AmountOfTransaction>16825</AmountOfTransaction>
        <DescriptionOfTransaction>GTI research project funding</DescriptionOfTransaction>
        <SharingOfRevenues>false</SharingOfRevenues>
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        <NameOfInterestedPerson>
          <NameBusiness>
            <BusinessNameLine1>National Fuel Gas Company</BusinessNameLine1>
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        <Relationship>GTI director is an officer of company</Relationship>
        <AmountOfTransaction>100000</AmountOfTransaction>
        <DescriptionOfTransaction>Sustaining Membership Program</DescriptionOfTransaction>
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            <BusinessNameLine1>National Fuel Gas Company</BusinessNameLine1>
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        <AmountOfTransaction>780</AmountOfTransaction>
        <DescriptionOfTransaction>GTI Education class</DescriptionOfTransaction>
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        <NameOfInterestedPerson>
          <NameBusiness>
            <BusinessNameLine1>Nicor Gas</BusinessNameLine1>
          </NameBusiness>
        </NameOfInterestedPerson>
        <Relationship>GTI director is an officer of parent of company</Relationship>
        <AmountOfTransaction>877811</AmountOfTransaction>
        <DescriptionOfTransaction>GTI research project funding</DescriptionOfTransaction>
        <SharingOfRevenues>false</SharingOfRevenues>
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          <NameBusiness>
            <BusinessNameLine1>Questar Gas</BusinessNameLine1>
          </NameBusiness>
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        <Relationship>GTI director is an officer of company</Relationship>
        <AmountOfTransaction>100000</AmountOfTransaction>
        <DescriptionOfTransaction>GTI Sustaining Membership Program</DescriptionOfTransaction>
        <SharingOfRevenues>false</SharingOfRevenues>
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          <NameBusiness>
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        <AmountOfTransaction>61534</AmountOfTransaction>
        <DescriptionOfTransaction>GTI research project funding</DescriptionOfTransaction>
        <SharingOfRevenues>false</SharingOfRevenues>
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          <NameBusiness>
            <BusinessNameLine1>Questar Gas</BusinessNameLine1>
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        <Relationship>GTI director is an officer of company</Relationship>
        <AmountOfTransaction>5950</AmountOfTransaction>
        <DescriptionOfTransaction>GTI education class</DescriptionOfTransaction>
        <SharingOfRevenues>false</SharingOfRevenues>
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      <GeneralExplanation>
        <Explanation>Form 990 Part IX Line 11g Total of Other Services exceeds 10 of line 25 Col A, therefore a list of the expenses follows Engineering and Technical Services - 9,415,557, Education and Training Services - 739,207, Patent maintenance services - 304,364, Shipping services - 77,580, Intellectual property consulting services - 49,500, Advocacy services - 33,409, Customer satisfaction survey svcs - 26,800, Information services - 13,235, Repair services - 10,014, Editorial services - 8,188.</Explanation>
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      <GeneralExplanation>
        <Explanation>Form 990 Part VI Section A Line 6 Members elect the members of its governing body, its board of directors. Members all have the same voting rights.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <Explanation>Form 990 Part VI Section A Line 7a 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.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <Explanation>Form 990 Part VI Section A Line 7b Changes to the organizations articles of incorporation require the approval of its members.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <Explanation>Form 990 Part VI Section B Line 11b The CFO reviews the Form 990 prior to its distribution to the members of the governing body.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <Explanation>Form 990 Part VI Section B Line 12c 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 an obligation to obtain the General Counsels prior written approval for all such activity. The failure to obtain such 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.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <Explanation>Form 990 Part VI Section B Line 15 The positions that were reviewed included the President and CEO, Vice President and Chief Technology Officer, 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 all compensation for officers and reviews all compensation for managing directors as well. Their actions are detailed in the Compensation Committee minutes.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <Explanation>Form 990 Part VI Section C Line 19 No documents available to the public.</Explanation>
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          <City>DesPlaines</City>
          <State>IL</State>
          <ZIPCode>60018</ZIPCode>
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        <PrimaryActivity>Contractor/Consultant</PrimaryActivity>
        <LegalDomicileState>DE</LegalDomicileState>
        <DirectControllingEntityName>
          <BusinessNameLine1>GRI International Inc</BusinessNameLine1>
        </DirectControllingEntityName>
        <PredominantIncomeType>Unrelated</PredominantIncomeType>
        <ShareOfTotalIncome>-6868</ShareOfTotalIncome>
        <ShareOfEOYAssets>8305</ShareOfEOYAssets>
        <DisproportionateAllocations>false</DisproportionateAllocations>
        <GeneralOrManagingPartner>false</GeneralOrManagingPartner>
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      <Form990ScheduleRPartIII>
        <NameOfRelatedOrg>
          <BusinessNameLine1>Cement Lock Group LLC</BusinessNameLine1>
        </NameOfRelatedOrg>
        <AddressUS>
          <AddressLine1>1700 S Mount Prospect Road</AddressLine1>
          <City>DesPlaines</City>
          <State>IL</State>
          <ZIPCode>60018</ZIPCode>
        </AddressUS>
        <EIN>364193651</EIN>
        <PrimaryActivity>Contractor/consultant</PrimaryActivity>
        <LegalDomicileState>DE</LegalDomicileState>
        <DirectControllingEntityName>
          <BusinessNameLine1>Endesco Services Inc</BusinessNameLine1>
        </DirectControllingEntityName>
        <PredominantIncomeType>Unrelated</PredominantIncomeType>
        <ShareOfTotalIncome>28398</ShareOfTotalIncome>
        <ShareOfEOYAssets>6459</ShareOfEOYAssets>
        <DisproportionateAllocations>true</DisproportionateAllocations>
        <GeneralOrManagingPartner>false</GeneralOrManagingPartner>
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      <Form990ScheduleRPartIII>
        <NameOfRelatedOrg>
          <BusinessNameLine1>starline Trenchless Technology LLC</BusinessNameLine1>
        </NameOfRelatedOrg>
        <AddressUS>
          <AddressLine1>1700 S Mount Prospect Road</AddressLine1>
          <City>DesPlaines</City>
          <State>IL</State>
          <ZIPCode>60018</ZIPCode>
        </AddressUS>
        <EIN>223647298</EIN>
        <PrimaryActivity>Distribution</PrimaryActivity>
        <LegalDomicileState>DE</LegalDomicileState>
        <DirectControllingEntityName>
          <BusinessNameLine1>GRI International Inc</BusinessNameLine1>
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        <PredominantIncomeType>Unrelated</PredominantIncomeType>
        <ShareOfTotalIncome>17909</ShareOfTotalIncome>
        <ShareOfEOYAssets>300904</ShareOfEOYAssets>
        <DisproportionateAllocations>false</DisproportionateAllocations>
        <GeneralOrManagingPartner>false</GeneralOrManagingPartner>
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          <BusinessNameLine1>GRI International Inc</BusinessNameLine1>
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        <AddressUS>
          <AddressLine1>1700 S Mount Prospect</AddressLine1>
          <City>DesPlaines</City>
          <State>IL</State>
          <ZIPCode>60018</ZIPCode>
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