Document:

Lease Agreement

 EXHIBIT 10.20 
 Tenant: International Mill Service Inc. 
 Suite No.: 
 LEASE 
 THIS LEASE
(“Lease”) is entered into as of the 3rd day May, 2005, between BRANDYWINE OPERATING PARTNERSHIP, L.P., a
Delaware limited partnership (“Landlord”), and INTERNATIONAL MILL SERVICE, INC., a Pennsylvania corporation with its principal place of business at 1155 Business Center Drive, Horsham, Pennsylvania (“Tenant”). 
 Landlord’s predecessor and Tenant’s predecessor are parties to a certain Lease Agreement dated December 21, 1990, as amended by Lease
Modification Agreement dated March 28, 1996, Second Lease Modification Agreement dated April 7,1996 and Third Amendment to Lease dated September 26, 1997 (“Existing Lease”). Landlord and Tenant desire to amend the Existing
Lease for the period from the date hereof through March 31, 2006 in accordance with Article 28 hereof and thereafter terminate the Existing Lease as of March 31, 2006 and put into effect on April 1, 2006, the provisions of Articles 1
through 27 hereof. In consideration of the mutual covenants stated below, and intending to be legally bound, the parties covenant and agree as follows: 
 1. PREMISES. Effective April 1, 2006, Landlord leases to Tenant and Tenant leases from Landlord Suite No. 200, which the parties stipulate and agree is 24,038 shown on the plan which shall be prepared
in accordance with Article28 hereof and thereafter attached hereto as Exhibit “A” (“Premises”), located at 1155 Business Center Drive, Horsham, Pennsylvania (“Building”), which is a part of the project located at
Horsham Business Center, Horsham, Pennsylvania (“Project”). Except as set forth in Article 28 the Premises are delivered “As Is”. 
 2. TERM. The Term of this Lease shall commence on April 1, 2006 (the “Commencement Date”). The Term shall be for a period of sixty (60) months (‘Term”) ending on the last day of
the calendar month. The Commencement Date shall be confirmed by Landlord and Tenant by the execution of a Confirmation of Lease Term (“COLT”) in the form attached hereto as Exhibit “B”. If Tenant fails to execute or object
to the COLT within ten (10) business days of its delivery, Landlord’s determination of such dates shall be deemed accepted by Tenant. 
 3. FIXED RENT; SECURITY DEPOSIT. 
 (a) Commencing on the Commencement
Date and on the first (lst) day of each month thereafter during the Term, Tenant shall pay to Landlord without
notice or demand, and without set-off, deduction or counterclaim (except as otherwise set forth in this Lease) the monthly installment of annual Fixed Rent as set forth below by (i) check sent to Landlord, P.O. Box 8538-363, Philadelphia, PA
19171 or (ii) wire transfer of immediately available funds to the account at Wachovia Bank, Salem NJ account no. 2030000359075 ABA #031201467; such transfer to be confirmed by Landlord’s accounting department upon written request by Tenant
All payments must include the following information: Building #115 and Lease #            . The Lease # will be provided to Tenant in the Confirmation of Lease Term Fixed Rent and
all other sums due from Tenant under this Lease shall collectively be defined as “Rent”. 
  

							
	 LEASE YEAR
	  	 PER R.S.F.
	  	 INSTALLMENTS
	  	 FIXED RENT

	Months 1-12  	  	$19.50, *	  	$39,061.75	  	$468,741.00
	Months 13-24	  	$20.00, *	  	$40,063.33	  	$480,760.00
	Months 25-36	  	$20.50, *	  	$41,064.92	  	$492,779.00
	Months 37-48	  	$21.00, *	  	$42,066.50	  	$504,798.00
	Months 49-60	  	$21.50, *	  	$43,068.08	  	$576,817.00

	*	plus any charges set forth in Articles 4 and 5 below. Upon final determination of the square footage of the Premises and monthly installment and annual Fixed Rent shall be
calculated and verified in the Confirmation of Lease Term Agreement 

 (b) Tenant shall pay the first full month’s
installment of Fixed Rent (or such initial partial month) and the Security Deposit (as defined below) by two separate checks upon the Tenant’s execution of this Lease. If any amount due from Tenant is not paid to Landlord when due. Tenant shall
also pay as Additional Rent (as defined in Article 4 hereof) a late fee of ten (10%) percent of the total payment then due. The late fee shall accrue on the initial date of a payment’s due date, irrespective of any grace period
granted hereunder. Tenant shall be required to continue to post a security deposit of $28,795 under this Lease (the “Security Deposit”), as security for the prompt and complete performance by Tenant of every provision of this Lease. No
interest shall be paid to Tenant on the Security Deposit. If Tenant fails to perform any of its obligations hereunder. Landlord may use, apply or retain the whole or any part of the Security Deposit for the payment of (i) any rent or other sums
of money which Tenant may not have paid when due, (ii) any sum expended by Landlord in accordance with the provisions of this Lease, and/or (iii) any sum which Landlord may expend or be required to expend by reason of Tenant’s
default. The use of the Security Deposit by Landlord shall not prevent Landlord from exercising any other remedy provided by this Lease or 

  

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by law and shall not operate as either liquidated damages or as a limitation on any recovery to which Landlord may otherwise be entitled. If any portion of
the Security Deposit is used, applied or retained by Landlord, Tenant agrees, within five (5) days after the written demand therefor is made by Landlord, to deposit cash with the Landlord in an amount sufficient to restore the Security Deposit
to its original amount. In addition to the foregoing, if Tenant defaults (irrespective of the fact that Tenant cured such default) more than once in its performance of a monetary obligation and such monetary defaults aggregate in excess of $50,000
under this Lease, Landlord may require Tenant to increase the Security Deposit to the greater of twice the (i) Fixed Rent then paid monthly, or (ii) the initial amount of the Security Deposit. If Tenant shall fully comply with all of the
provisions of this Lease, the Security Deposit, or any balance thereof, shall be returned to Tenant within a reasonable time after the later of expiration of the Term or Tenant’s surrender of the Premises as required hereunder. Upon the return
of the Security Deposit to the original Tenant hereunder, or the remaining balance thereof, Landlord shall be completely relieved of liability with respect to the Security Deposit. In the event of a transfer of the Building, Landlord shall have the
right to transfer the Security Deposit and Landlord shall thereupon be released by Tenant from all liability for the return of such Security Deposit. Upon the assumption of such Security Deposit by the transferee, Tenant agrees to look solely to the
new landlord for the return of said Security Deposit. 
 4. ADDITIONAL RENT. Effective April 1, 2006 but commencing
January 1, 2007, and in each calendar year thereafter during the Term, Tenant shall pay in advance on a monthly basis to Landlord, Tenant’s Share of the “Recognized Expenses”, without deduction, counterclaim or setoff, to the
extent such Recognized Expenses exceed the Recognized Expenses in calendar year 2006 (“Base Year”). Tenant’s Share shall be 46.77% which is the percentage calculated by dividing the total square footage of the Premises into the total
square footage of the Building which is 51,388. Recognized Expenses are (i) all reasonable operating costs and expenses related to the maintenance, operation and repair of the Project incurred by Landlord, including but not limited to
management fee not to exceed five (5%) percent of Rent; common area electric; and capital expenditures and capital repairs and replacements shall be included as operating expenses solely to the extent of the amortized costs of same over
the useful life of the improvement in accordance with generally accepted accounting principles such useful life not to exceed ten (10) years; (ii) all insurance premiums payable by Landlord for insurance with respect to the Project and
(iii) Taxes payable on the Project. Each of the Recognized Expenses shall for all purposes be treated and considered as Additional Rent. Tenant shall pay, in monthly installments in advance, on account of Tenant’s Share of Recognized
Expenses, the estimated amount of the increase of such Recognized Expenses for such year in excess of the Base Year as determined by Landlord in its reasonable discretion. Prior to the end of the calendar year in which the Lease commences and
thereafter for each successive calendar year (each, a “Lease Year”), or part thereof, Landlord shall send to Tenant a statement of projected increases in Recognized Expenses in excess of the Base Year and shall indicate what Tenant’s
Share of Recognized Expenses shall be. The Base Year shall be adjusted to exclude from the Base Year “extraordinary items” incurred in such calendar year. For purposes or this subparagraph, extraordinary items shall mean either
(X) cost increases over the prior calendar year of eleven and one quarter percent (11.25%) or more, or (Y) items which increase Landlord’s total expenses and such items have not been included in the determination of expenses by
the Landlord (or the Landlord’s predecessor in interest) for the prior three years of operating the Building. As soon as administratively available, Landlord shall send to Tenant a statement of actual for Recognized Expenses for the prior Lease
Year showing the Share due from Tenant. In the event the amount prepaid by Tenant exceeds the amount that was actually due then Landlord shall issue a credit to Tenant in an amount equal to the over charge, which credit Tenant may apply to future
payments on account of Recognized Expenses until Tenant has been fully credited with the over charge. If the credit due to Tenant is more than the aggregate total of future rental payments, Landlord shall pay to Tenant the difference between the
credit in such aggregate total. In the event Landlord has undercharged Tenant, then Landlord shall send Tenant an invoice with the additional amount due, which amount shall be paid in full by Tenant within thirty (30) days of receipt.

 Tenant shall have the right, at its sole cost and expense, within ninety (90) days from receipt of Landlord’s statement of
Recognized Expenses, to audit or have its appointed accountant audit Landlord’s records related to Recognized Expenses and Taxes provided that any such audit may not occur more frequently than once each calendar year nor apply to any year prior
to the year of the statement being reviewed. In the event Tenant’s audit discloses any discrepancy, Landlord and Tenant shall use their best efforts to resolve the dispute and make an appropriate adjustment, failing which, they shall submit any
such dispute to arbitration pursuant to the rules and under the jurisdiction of the American Arbitration Association in Philadelphia, Pennsylvania. The decision rendered in such arbitration shall be final, binding and non-appealable. The expenses of
arbitration, other than individual legal and accounting expenses which shall be the respective parties’ responsibility, shall be divided equally between the parties. In the event, by agreement or as a result of an arbitration decision, it is
determined that the actual Recognized Expenses and Taxes exceeded those claimed by the Landlord by more than six percent (6%), the actual, reasonable hourly costs to Tenant of Tenant’s audit (including legal and accounting costs) shall be
reimbursed by Landlord. In the event Tenant utilizes a contingent fee auditor and Landlord is responsible for the payment of such auditor, Landlord shall only pay the reasonable hourly fee of such auditor 
 5. ELECTRICITY CHARGES. Landlord shall not be liable for any interruption any utility service for any reason unless caused by the gross negligence
or willful misconduct of Landlord. Tenant shall pay to Landlord, as Additional Rent, within fifteen (15) business days of receipt of Landlord’s billing statement therefor, all charges incurred by Landlord for electricity, such charges to
be based upon Tenant’s consumption, as measured by Landlord’s submeter for the Premises. 
 6. SIGNS; USE OF PREMISES AND COMMON
AREAS. Landlord shall provide the original Tenant hereinabove named with standard identification signage on all Building directories and at the entrance to the 

  

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Premises and shall replace the existing sign outside the Building with a sign of similar size and design to properly reflect the Tenant’s name and its
designated affiliate. No other signs shall be placed, erected or maintained by Tenant at any place upon the Premises, Building or Project. Tenant’s use of the Premises shall be limited to general office use and storage incidental thereto
(“Permitted Use”). The Permitted Use shall be subject to all applicable laws and governmental rules and regulations and to all reasonable requirements of the insurers of the Building Tenant shall not install in or for the Premises, any
equipment which requires more electric current than is standard. Tenant shall have the right, non-exclusive and in common with others, to use (i) the exterior paved driveways and walkways of the Building for vehicular and pedestrian access to
the Building, (ii) the internal common area, including elevators and (iii) the designated parking areas of the Project for the parking of automobiles of Tenant and its employees and business visitors; provided Landlord shall have the right
in its sole discretion and from time to time, to construct, maintain, operate, repair, close, limit, take out of service, alter, change and modify all or any part of the common areas of the Project, including without limitation, reasonably restrict
or limit Tenant’s utilization of the parking areas in the event the same become overburdened and in such case to equitably allocate on proportionate basis or assign parking spaces among Tenant and the other tenants of the Building. 

7. ENVIRONMENTAL MATTERS. Tenant shall not generate, manufacture, refine, transport, treat, store, handle, dispose, bring or otherwise cause to
be brought or permit any of its agents, employees, contractors or invitees to bring in, on or about any part of the Premises, Building or Project, any hazardous substance or hazardous waste in violation of applicable law. 
 8. TENANTS ALTERATIONS. Tenant will not cut or drill into or secure any fixture, apparatus or equipment or make alterations, improvements or
physical additions (collectively, “Alterations”) of any kind to any part of the Premises without first obtaining the written consent of Landlord, such consent not to be unreasonably withheld. Notwithstanding anything in this Lease to the
contrary, all furniture, movable trade fixtures and equipment (but not including telephone, security and communication equipment system wiring and cabling) installed by or for Tenant, its assignees or sublessees shall be removed by Tenant at the
termination of this Lease. 
 9. ASSIGNMENT AND SUBLETTING. Tenant shall not, without the prior written consent of Landlord, assign
this Lease or any interest herein or sublet the Premises or any part thereof. Any of the foregoing acts without such consent shall be void. If at any time during the Term Tenant desires to assign this Lease or sublet all or any part of the Premises,
Tenant shall give notice to Landlord of such desire, including the name, address and contact party for the proposed assignee or subtenant, the effective date of the proposed assignment or sublease (including the proposed occupancy date by the
proposed assignee or sublessee), and in the instance of a proposed sublease, the square footage to be subleased, a floor plan professionally drawn to scale depicting the proposed sublease area, and a statement of the duration of the proposed
sublease (which shall in any and all events expire by its terras prior to the scheduled expiration of this Lease, and immediately upon the sooner termination hereof). Landlord may, at its option, exercisable by notice given to Tenant within
forty-five (45) days next following Landlord’s receipt of Tenant’s notice, elect to recapture the Premises if Tenant is proposing to sublet more than twenty-five (25%) percent of the Premises or terminate this Lease in the event
of an assignment. Regardless of Landlord’s consent, no subletting or assignment shall release Tenant of Tenant’s obligation or alter the primary liability of Tenant to pay the Rent and to perform all other obligations to be performed by
Tenant hereunder for the remainder of the then current Lease Term. Landlord shall be entitled to a $250 fee for consenting to any sublet or assignment. 
 10. LANDLORD’S RIGHT OF ENTRY. Landlord and persons authorized by Landlord may enter the Premises at all reasonable times upon reasonable advance notice (or any time without notice in the case of an
emergency). Landlord shall not be liable for inconvenience to or disturbance of Tenant by reason of any such entry; provided, however, that in the case of repairs or work, such shall be done, so far as practicable, so as to not unreasonably
interfere with Tenant’s use of the Premises. 
 11. REPAIRS AND MAINTENANCE. Tenant, at its sole cost and expense, shall keep and
maintain the Premises in good order and condition, free of rubbish, and shall promptly make all non-structural repairs necessary to keep and maintain such good order and condition. Tenant shall have the option of replacing lights, ballasts, tubes,
ceiling tiles, outlets and similar equipment itself or it shall have the ability to advise Landlord of Tenant’s desire to have Landlord make such repairs. If requested by Tenant, Landlord shall make such repairs to the Premises within a
reasonable time of notice to Landlord and shall charge Tenant for such services at Landlord’s standard rate (such rate to be competitive with the market rate for such services). When used in this Article 11, the term “repairs”
shall include replacements and renewals when necessary. All repairs made by Tenant or Landlord shall utilize materials and equipment which are at least equal in quality and usefulness to those originally used in constructing the Building and the
Premises. Landlord shall provide the janitorial services for the Premises set forth on Exhibit “C”. 
 12. INSURANCE;
SUBROGATION RIGHTS. Tenant shall obtain and keep in force at all times during the term hereof, at its own expense, commercial general liability insurance including contractual liability and personal injury liability and all similar coverage,
with combined single limits of $2,000,000.00 on account of bodily injury to or death of one or more persons as the result of any one accident or disaster and on account of damage to property. Tenant shall also require its movers to procure and
deliver to Landlord a certificate of insurance naming Landlord as an additional insured. Tenant shall, at its sole cost and expense, maintain in full force and effect on all Tenant’s trade fixtures, equipment and personal property on the
Premises, a policy of “special form” property insurance covering the full replacement value of such property. All liability insurance required hereunder shall not be subject to cancellation without at least thirty (30) days
prior notice to all insureds, and shall name Tenant as 

  

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insured and Landlord and Brandywine Realty Trust as additional insureds, and, if requested by Landlord, shall also name as an additional insured any
mortgagee or holder of any mortgage which may be or become a lien upon any part of the Premises. Prior to the commencement of the Term, Tenant shall provide Landlord with certificates which evidence that the coverages required have been obtained for
the policy periods. Tenant shall also furnish to Landlord throughout the Term replacement certificates at least thirty (30) days prior to the expiration dates of the then current policy or policies. All the insurance required under this Lease
shall be issued by insurance companies authorized to do business in the Commonwealth of Pennsylvania with a financial rating of at least an A-X as rated in the most recent edition of Best’s Insurance Reports and in business for the past five
years. The limit of any such insurance shall not limit the liability of Tenant hereunder. If Tenant fails to maintain such insurance, Landlord may, but is not required to, procure and maintain the same, at Tenant’s expense to be reimbursed by
Tenant as Additional Rent within ten (10) days of written demand. Any deductible under such insurance policy in excess of Twenty Five Thousand ($25,000) must be approved by Landlord in writing prior to issuance of such policy. Tenant shall not
self-insure without Landlord’s prior written consent Each party hereto, and anyone claiming through or under them by way of subrogation, waives and releases any cause of action it might have against the other party and Brandywine Realty Trust
and their respective employees, officers, members, partners, trustees and agents, on account of any loss or damage that is insured against under any insurance policy required to be obtained hereunder. Each party agrees that it will use its best
efforts to cause its insurance carrier to endorse all applicable policies waiving the carrier’s right of recovery under subrogation or otherwise against the other party. 
 13. INDEMNIFICATION. Tenant shall defend, indemnify and hold harmless Landlord, Brandywine Realty Trust and their respective employees and agents
from and against any and all third-party claims, actions, damages, liability and expense (including all reasonable attorney’s fees, expenses and liabilities incurred in defense of any such claim or any action or proceeding brought thereon)
arising from any activity, work or things done, permitted or suffered by Tenant or its agents, licensees or invitees in or about the Premises, the Building or the Project contrary to the requirements of this Lease, and any negligence or willful act
of Tenant or any of Tenant’s agents, contractors, employees or invitees. Without limiting the generality of the foregoing, Tenant’s obligations shall include any case in which Landlord or Brandywine Realty Trust shall be made a party to
any litigation commenced by or against Tenant, its agents, subtenants, licensees, concessionaires, contractors, customers or employees, in which case Tenant shall defend, indemnify and hold harmless Landlord and Brandywine Realty Trust and shall pay
all costs, expenses and reasonable attorney’s fees incurred or paid by Landlord and Brandywine Realty Trust in connection with such litigation, after notice to Tenant and Tenant’s refusal to defend such litigation, and upon notice from
Landlord shall defend the same at Tenant’s expense by counsel reasonably satisfactory to Landlord. 
 14. FIRE DAMAGE. If
(i) the casualty damage is of a nature or extent that, in Landlord’s reasonable judgment, the repair and restoration work would require more than two hundred ten (210) consecutive days to complete after the casualty (assuming normal
work crews not engaged in overtime), or (ii) more than thirty (30%) percent of the total area of the Building is extensively damaged, or (iii) the casualty occurs in the last Lease Year of the Term and Tenant has not exercised a
renewal right or (iv) insurance proceeds are unavailable or insufficient, either party shall have the right to terminate this Lease and all the unaccrued obligations of the parties hereto, by sending written notice of such termination to the
other within thirty (30) days of the date of casualty. Such notice is to specify a termination date no less than fifteen (15) days after its transmission. In the event of damage or destruction to the Premises or any part thereof as set
forth in subsections (i), (ii) or (iii) above and neither party has terminated this Lease, Tenant’s obligation to pay Fixed Rent and Additional Rent shall be equitably adjusted or abated for such time as the Premises is not capable of
being used by Tenant for its Permitted Use. 
 15. SUBORDINATION; RIGHTS OF MORTGAGEE. This Lease shall be subordinate at all times to
the lien of any mortgages now or hereafter placed upon the Premises, Building and/or Project and land of which they are a part without the necessity of any further instrument or act on the part of Tenant to effectuate such subordination. Tenant
further agrees to execute and deliver within ten (10) day of demand such further instrument evidencing such subordination and attornment as shall be reasonably required by any mortgagee. If Landlord shall be or is alleged to be in default of
any of its obligations owing to Tenant under this Lease, Tenant shall give to the holder of any mortgage (the “Mortgagee”) now or hereafter placed upon the Premises, Building and/or Project, notice by overnight mail of any such default
which Tenant shall have served upon Landlord. Tenant shall not be entitled to exercise any right or remedy as there may be because of any default by Landlord without having given such notice to the Mortgagee. If Landlord shall fail to cure such
default, the Mortgagee shall have forty-five (45) additional days within which to cure such default. 
 16. CONDEMNATION. If in
Landlord’s reasonable judgement a taking renders the Building unsuitable at Landlord’s option, this Lease shall, at either party’s option, terminate as of the date title to the condemned real estate vests in the condemnor, and the
Rent herein reserved shall be apportioned and paid in full by Tenant to Landlord to that date and all rent prepaid for period beyond that date shall forthwith be repaid by Landlord to Tenant and neither party shall thereafter have any liability
hereunder. If this Lease is not terminated after any such taking or condemnation, the Fixed Rent and the Additional Rent shall be equitably reduced in proportion to the area of the Premises which has been taken for the balance of the Term. Tenant
shall have the right to make a claim against the condemnor to the extent that such claim does not reduce the sums otherwise payable by the condemnor to Landlord. 
 17. ESTOPPEL CERTIFICATE. Each party agrees at any time and from time to time, within ten (10) days after the other party’s written request, to execute and deliver to the other party a written
instrument in recordable form certifying all information reasonably requested. 
 18. DEFAULT. If: Tenant fails to pay any installment
of Rent when due; provided, however, Landlord shall provide written notice of the failure to pay such Rent and Tenant shall have a three (3) business day 

  

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grace period from its receipt of such Landlord’s notice within which to pay such Rent without creating a default hereunder. The late fee set forth in
Article 3 hereof shall be due on the first day after such payment is due irrespective of the foregoing notice and grace period; Tenant “vacates” the Premises (other than in the case of a permitted subletting or assignment) or permits the
same to be unoccupied; Tenant fails to bond over a construction or mechanics lien within ten (10) days of demand; Tenant fails to observe or perform any of Tenant’s other non-monetary agreements or obligations herein contained within ten
(10) days after written notice specifying the default, or the expiration of such additional time period as is reasonably necessary to cure such default, provided Tenant immediately commences and thereafter proceeds with all due diligence and in
good faith to cure such default; then, in any such event, an “Event of Default” shall be deemed to exist and Tenant shall be in default hereunder. 
 If an Event of Default shall occur, the following provisions shall apply and Landlord shall have, in addition to all other rights and remedies available at law or in equity, including the right to terminate the Lease,
the rights and remedies set forth herein, which may be exercised upon or at any time following the occurrence of an Event of Default. 1. Acceleration of Rent. By notice to Tenant, Landlord shall have the right to accelerate all Rent and all
expense due hereunder and otherwise payable in installments over the remainder of the Term; and the amount of accelerated rent to the termination date, without further notice or demand for payment, shall be due and payable by Tenant within five
(5) days after Landlord has so notified Tenant, such amount collected from Tenant shall be discounted to present value using an interest rate of six percent (6%) per annum. Additional Rent which has not been included, in whole or in part,
in accelerated rent, shall be due and payable by Tenant during the remainder of the Term, in the amounts and at the times otherwise provided for in this Lease. 2. Landlord’s Damages. The damages which Landlord shall be entitled to
recover from Tenant shall be the sum of: (i) all Fixed Rent and Additional Rent accrued and unpaid as of the termination date; and (ii)(a) all reasonable costs and expenses incurred by Landlord in recovering possession of the Premises,
including actual legal fees, and removal and storage of Tenant’s property, (ii)(b) the reasonable costs and expenses of restoring the Premises to the condition in which the same were to have been surrendered by Tenant as of the expiration of
the Term, and (ii)(c) the costs of reletting commissions; and (iii) all Fixed Rent and Additional Rent otherwise payable by Tenant over the remainder of the Term as reduced to present value and all consequential damages relating to Tenant’s
breach of this Lease. Less deducting from the total determined under subsections (i), (ii) and (iii) above, all Rent which Landlord receives from other tenant(s) by reason of the leasing of the Premises during any period falling within the
otherwise remainder of the Term. 3. Landlord’s Right to Cure. Without limiting the generality of the foregoing, if Tenant shall fail to perform any of its obligations hereunder, Landlord may, in addition to any other rights it may have
in law or in equity, cure such default on behalf of Tenant, and Tenant shall reimburse Landlord upon demand for any sums paid or costs incurred by Landlord in curing such default, including reasonable attorneys’ fees and other legal expenses,
together with interest at a rate of twelve (12%) percent (“Default Rate”) from the dates of Landlord’s incurring of costs or expenses. 4. Interest on Damage Amounts. Any sums payable by Tenant hereunder, which are not paid
after the same shall be due, shall bear interest at the Default Rate. 5. No Waiver by Landlord. No delay or forbearance by Landlord in exercising any right or remedy hereunder, or Landlord’s undertaking or performing any act or matter
which is not expressly required to be undertaken by Landlord shall be construed, respectively, to be a waiver of Landlord’s rights or to represent any agreement by Landlord to undertake or perform such act or matter thereafter. Waiver by
Landlord of any breach by Tenant of any covenant or condition herein contained (which waiver shall be effective only if so expressed in writing by Landlord) or failure by Landlord to exercise any right or remedy in respect of any such breach shall
not constitute a waiver or relinquishment for the future of Landlord’s right to have any such covenant or condition duly performed or observed by Tenant, or of Landlord’s rights arising because of any subsequent breach of any such covenant
or condition nor bar any right or remedy of Landlord in respect of such breach or any subsequent breach. 
 In addition to, and not in lieu
of any of the foregoing rights granted to Landlord: TENANT HEREBY EMPOWERS ANY PROTHONOTARY, CLERK OF COURT OR ATTORNEY OF ANY COURT OF RECORD TO APPEAR FOR TENANT IN ANY AND ALL ACTIONS WHICH MAY BE BROUGHT FOR ANY RENT, OR ANY CHARGES HEREBY
RESERVED OR DESIGNATED AS RENT OR ANY OTHER SUM PAYABLE BY TENANT TO LANDLORD UNDER OR BY REASON OF THIS LEASE, INCLUDING, WITHOUT LIMITATION, ANY SUM PAYABLE HEREUNDER, AND TO SIGN FOR TENANT AN AGREEMENT FOR ENTERING IN ANY COMPETENT COURT AN
ACTION OR ACTIONS FOR THE RECOVERY OF SAID RENT, CHARGES AND OTHER SUMS, AND IN SAID SUIT OR IN SAID ACTION OR ACTIONS TO CONFESS JUDGMENT AGAINST TENANT FOR ALL OR ANY PART OF THE RENT SPECIFIED IN THIS LEASE AND THEN UNPAID INCLUDING, AT
LANDLORD’S OPTION, THE RENT FOR THE ENTIRE UNEXPIRED BALANCE OF THE TERM OF THIS LEASE, AND ALL OR ANY PART OF ANY OTHER OF SAID CHARGES OR SUMS, AND FOR INTEREST AND COSTS TOGETHER WITH REASONABLE ATTORNEY’S FEES OF 5%. SUCH AUTHORITY
SHALL NOT BE EXHAUSTED BY ONE EXERCISE THEREOF, BUT JUDGMENT MAY BE CONFESSED AS AFORESAID FROM TIME TO TIME AS OFTEN AS ANY OF SAID RENT OR SUCH OTHER SUMS, CHARGES, PAYMENTS, COSTS AND EXPENSES SHALL FALL DUE OR BE IN ARREARS, AND SUCH POWERS MAY
BE EXERCISED AS WELL AFTER THE EXPIRATION OF THE TERM OR DURING ANY EXTENSION OR RENEWAL OF THIS LEASE. 
 WHEN THIS LEASE OR TENANT’S
RIGHT OF POSSESSION SHALL BE TERMINATED BY COVENANT OR CONDITION BROKEN, OR FOR ANY OTHER REASON, EITHER DURING THE TERM OF THIS LEASE OR ANY RENEWAL OR EXTENSION THEREOF, AND ALSO WHEN AND AS SOON AS THE TERM HEREBY CREATED OR ANY EXTENSION THEREOF
SHALL HAVE EXPIRED, IT SHALL BE LAWFUL FOR ANY ATTORNEY AS ATTORNEY FOR TENANT TO FILE AN AGREEMENT FOR 

  

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ENTERING IN ANY COMPETENT COURT AN ACTION TO CONFESS JUDGMENT IN EJECTMENT AGAINST TENANT AND ALL PERSONS CLAIMING UNDER TENANT, WHEREUPON, IF LANDLORD SO
DESIRES, A WRIT OF EXECUTION OR OF POSSESSION MAY ISSUE FORTHWITH, WITHOUT ANY PRIOR WRIT OF PROCEEDINGS, WHATSOEVER, AND PROVIDED THAT IF FOR ANY REASON AFTER SUCH ACTION SHALL HAVE BEEN COMMENCED THE SAME SHALL BE DETERMINED AND THE POSSESSION OF
THE PREMISES HEREBY DEMISED REMAIN IN OR BE RESTORED TO TENANT, LANDLORD SHALL HAVE THE RIGHT UPON ANY SUBSEQUENT DEFAULT OR DEFAULTS, OR UPON THE TERMINATION OF THIS LEASE AS HEREINBEFORE SET FORTH, TO BRING ONE OR MORE ACTION OR ACTIONS AS
HEREINBEFORE SET FORTH TO RECOVER POSSESSION OF THE SAID PREMISES. 
 In any action to confess judgment in ejectment or for rent in arrears,
Landlord shall first cause to be filed in such action an affidavit made by it or someone acting for it setting forth the facts necessary to authorize the entry of judgment, of which facts such affidavit shall be conclusive evidence, and if a true
copy of this Lease (and of the truth of the copy such affidavit shall be sufficient evidence) be filed in such action, it shall not be necessary to file the original as a warrant of attorney, any rule of Court, custom or practice to the contrary
notwithstanding. 
 [GRAPHIC APPEARS HERE] (INITIAL). TENANT WAIVER. TENANT SPECIFICALLY ACKNOWLEDGES THAT TENANT HAS VOLUNTARILY,
KNOWINGLY AND INTELLIGENTLY WAIVED CERTAIN DUE PROCESS RIGHTS TO A PREJUDGMENT HEARING BY AGREEING TO THE TERMS OF THE FOREGOING PARAGRAPHS REGARDING CONFESSION OF JUDGMENT. TENANT FURTHER SPECIFICALLY AGREES THAT IN THE EVENT OF DEFAULT, LANDLORD
MAY PURSUE MULTIPLE REMEDIES INCLUDING OBTAINING POSSESSION PURSUANT TO A JUDGMENT BY CONFESSION AND ALSO OBTAINING A MONEY JUDGMENT FOR PAST DUE AND ACCELERATED AMOUNTS AND EXECUTING UPON SUCH JUDGMENT. IN SUCH EVENT AND SUBJECT TO THE TERMS SET
FORTH HEREIN, LANDLORD SHALL PROVIDE FULL CREDIT TO TENANT FOR ANY MONTHLY CONSIDERATION WHICH LANDLORD RECEIVES FOR THE LEASED PREMISES IN MITIGATION OF ANY OBLIGATION OF TENANT TO LANDLORD FOR THAT MONEY. FURTHERMORE, TENANT SPECIFICALLY WAIVES
ANY CLAIM AGAINST LANDLORD AND LANDLORD’S COUNSEL FOR VIOLATION OF TENANT’S CONSTITUTIONAL RIGHTS IN THE EVENT THAT JUDGMENT IS CONFESSED PURSUANT TO THIS LEASE. 
 19. SURRENDER. Tenant shall, at the expiration of the Term, promptly quit and surrender the Premises in good order and condition and in conformity
with the applicable provisions of this Lease. Tenant shall have no right to hold over beyond the expiration of the Term and hi the event Tenant jails to deliver possession of the Premises as herein provided, Tenant’s occupancy shall not be
construed to effect or constitute anything other than a tenancy at sufferance. During the first flurry (30) days beyond the expiration of the Term the amount of rent owed to Landlord by Tenant shall automatically extend, at Landlord’s
option, for an additional month at one hundred fifty percent (150%), the sum of the Rent as those sums are at that time calculated under the provisions of the Lease. During the second thirty (30) days beyond the expiration of the Term the
amount of rent owed to Landlord by Tenant shall automatically extend, at Landlord’s option, for an additional month at one hundred seventy five percent (175%), the sum of the Rent as those sums are at that time calculated under the provisions
of the Lease. Thereafter the amount of rent owed to Landlord by Tenant shall automatically extend, at Landlord’s option, for an additional month at two hundred percent (200%), the sum of the Rent as those sums are at that time calculated under
the provisions of the Lease. The acceptance of rent by Landlord or the failure or delay of Landlord in notifying or evicting Tenant following the expiration or sooner termination of the Term shall not create any tenancy rights in Tenant and any such
payments by Tenant may be applied by Landlord against its costs and expenses, including attorneys fees, incurred by Landlord as a result of such holdover. 
 20. RULES AND REGULATIONS. At all times during the Term, Tenant, its employees, agents, invitees and licenses shall comply with all rules and regulations specified on Exhibit “D” attached
hereto and made a part hereof, together with all reasonable rules and regulations as Landlord may from time to time promulgate provided they do not materially increase the financial burdens of Tenant or take away any rights specifically provided to
Tenant in this Lease. In the event of an inconsistency between the rules and regulations and this Lease, the provisions of this Lease shall control. 
 21. GOVERNMENTAL REGULATIONS. Tenant shall, in the use and occupancy of the Premises and the conduct of Tenant’s business or profession therein, at all times comply with all applicable laws, ordinances,
orders, notices, rules and regulations of the federal, state and municipal governments. Landlord shall be responsible for compliance with Title III of the Americans with Disabilities Act of 1990, 42 U.S.C. §12181 et seq. and its
regulations, (collectively, the “ADA”) (i) as to the design and construction of exterior and interior common areas (e.g. sidewalks and parking areas) and (ii) with respect to the initial design and construction by
Landlord. Except as set forth above in the initial sentence hereto, Tenant shall be responsible for compliance with the ADA in all other respects concerning the use and occupancy of the Premises, which compliance shall include, without limitation
(i) provision for full and equal enjoyment of the goods, services, facilities, privileges, advantages or accommodations of the Premises as contemplated by and to the extent required by the ADA, (ii) compliance relating to requirements
under the ADA or amendments thereto arising after the date of this Lease and (iii) compliance relating to the design, layout, renovation, redecorating, refurbishment, alteration, or improvement to the Premises made or requested by Tenant at any
time following completion of the Landlord’s Work. 
 22. NOTICES. Wherever a notice is required, notice shall be deemed to have
been duly given if in writing and either: (i) personally served; (ii) delivered by pre-paid nationally recognized overnight courier service; 

  

 6 

 
(iii) forwarded by Registered or Certified mail, return receipt requested, postage prepaid; (iv) facsimile with a copy mailed by first class U.S. mail
or (v) e-mailed with evidence of receipt and delivery of a copy of the notice by first class mail; in all such cases addressed to the parties at the following addresses: 
  

							
	Tenant:	  	International Mill Service, Inc.	  		  	
		  	1155 Business Center Drive, Suite 200	  		  	
		  	Horsham, PA 19044	  		  	
		  	Attn: John Carroll	  		  	
		  	Fax No:	  		  	
		  	E-Mail:	  		  	
				
	Landlord:	  	Brandywine Operating Partnership, L.P.	  	Brandywine Realty Trust	  	
		  	401 Plymouth Road, Suite 500	  	401 Plymouth Road, Suite 500	  	
		  	Plymouth Meeting, PA 19462	  	Plymouth Meeting, PA 19462	  	
		  	Attn: Philip Schenkel, V.P.	  	Attn: Brad A. Molotsky, General Counsel	  	
		  	Fax No.: 610-325-5622	  	Fax No.: 610-832-4928	  	
		  	E-Mail: philip.schenkel@brandywinerealty.com	  	E-Mail: bmolotsky@brandywinerealty.com	  	

 Each such notice shall be deemed to have been given to or served upon the party to which addressed
on the date the same is delivered or delivery is refused. 
 23. BROKERS. Landlord and Tenant each represents and warrants to the
other that such party has had no dealings, negotiations or consultations with respect to the Premises or this transaction with any broker or finder other than GVA Smith Mack. Each party shall indemnify and hold the other harmless from and against
all liability, cost and expense, including attorney’s fees and court costs, arising out of any misrepresentation or breach of warranty under this Article. 
 24. LANDLORD’S LIABILITY. Landlord’s obligations hereunder shall be binding upon Landlord only for the period of time that Landlord is in ownership of the Building; and, upon termination of that
ownership, Tenant, except as to any obligations which are then due and owing, shall look solely to Landlord’s successor in interest in the Building for the satisfaction of each and every obligation of Landlord hereunder. Landlord shall have no
personal liability under any of the terms, conditions or covenants of this Lease and Tenant shall look solely to the equity of Landlord in the Building for the satisfaction of any claim, remedy or cause of action accruing to Tenant as a result of
the breach of any section of this Lease by Landlord. In addition to the foregoing, no recourse shall be had for an obligation of Landlord hereunder, or for any claim based thereon or otherwise in respect thereof, against any past, present or future
trustee, member, partner, shareholder, officer, director, partner, agent or employee of Landlord, whether by virtue of any statute or rule of law, or by the enforcement of any assessment or penalty or otherwise, all such other liability being
expressly waived and released by Tenant with respect to the above-named individuals and entities. 
 25. RELOCATION. Landlord, at its
sole expense, on at least sixty (60) days’ prior written notice to Tenant, may require Tenant to move from the Premises to another suite of substantially comparable size and decor in the Building or in the Project. In the event of any such
relocation, Landlord shall pay all the expenses of preparing and decorating the new premises so that they will be substantially similar to the Premises and shall also pay the expenses of moving Tenant’s furniture and equipment to the new
premises. 
 26. SELF HELP. If Landlord shall be in default in the performance of any of its obligations under this Lease which
default continues for a period of more than thirty (30) days after receipt of written notice from Tenant specifying such default, or if such default is of a nature to require more than thirty (30) days for remedy and continues beyond the
time reasonably necessary to cure (and Landlord has not undertaken procedures to cure the default within such thirty (30) day period and diligently pursued such efforts to complete such cure), Tenant may, in addition to any other remedy
available at law or in equity, upon at least five (5) business days prior written notice, incur any reasonably necessary expense to perform the obligation of Landlord specified in such notice and deduct such expense from the Fixed Rent.

 27. MISCELLANEOUS PROVISIONS. (a) Successors. The respective rights and obligations provided in this Lease shall bind
and inure to the benefit of the parties hereto, their successors and assigns; provided, however, that no rights shall inure to the benefit of any successors or assigns of Tenant unless Landlord’s written consent for the transfer to such
successor and/or assignee has first been obtained as provided in Article 9 hereof; (b) Governing Law. This Lease shall be construed, governed and enforced in accordance with the laws of the Commonwealth of Pennsylvania, without
regard to principles relating to conflicts of law; (c) Entire Agreement. This Lease, including the Exhibits and any Riders hereto, supersedes any prior discussions, proposals, negotiations and discussions between the parties and the
Lease contains all the agreements, conditions, understandings, representations and warranties made between the parties hereto with respect to the subject matter hereof, and may not be modified orally or in any manner other than by an agreement in
writing signed by both parties hereto or their respective successors in interest. Without in any way limiting the generality of the foregoing, this Lease can only be extended pursuant to the terms hereof, with the due exercise of an option (if any)
contained herein pursuant to a written agreement signed by both Landlord and Tenant specifically extending the term. No negotiations, correspondence by Landlord or offers to extend the term shall be deemed an extension of the termination date for
any period whatsoever; (d) Time of the Essence. TIME IS OF THE ESSENCE IN ALL PROVISIONS OF THIS LEASE, INCLUDING ALL NOTICE PROVISIONS TO BE PERFORMED BY OR ON BEHALF OF TENANT; (e) Accord and Satisfaction. No payment
by Tenant or receipt by Landlord of a lesser amount than any 

  

 7 

 
payment of Fixed Rent or Additional Rent herein stipulated shall be deemed to be other than on account of the earliest stipulated Fixed Rent or Additional
Rent due and payable hereunder, nor shall any endorsement or statement or any check or any letter accompanying any check or payment as Rent be deemed an accord and satisfaction. Landlord may accept such check or payment without prejudice to
Landlord’s right to recover the balance of such Rent or pursue any other right or remedy provided for in this Lease, at law or in equity; (f) Guaranty. Intentionally omitted, (g) Force Majeure. If by reason of strikes or
other labor disputes, fire or other casualty (or reasonable delays in adjustment of insurance), accidents, orders or regulations of any Federal, State, County or Municipal authority, or any other cause beyond Landlord’s reasonable control,
Landlord is unable to furnish or is delayed in furnishing any utility or service required to be furnished by Landlord under the provisions of this Lease or is unable to perform or make or is delayed in performing or making any installations,
decorations, repairs, alterations, additions or improvements, or is unable to fulfill or is delayed in fulfilling any of Landlord’s other obligations under this Lease, no such inability or delay shall constitute an actual or constructive
eviction, in whole or in part, or entitle Tenant to any abatement or diminution of Fixed Rent, or relieve Tenant from any of its obligations under this Lease, or impose any liability upon Landlord or its agents, by reason of inconvenience or
annoyance to Tenant, or injury to or interruption of Tenant’s business, or otherwise. (h) Financial Statements. Tenant shall furnish to Landlord, Landlord’s Mortgagee, prospective Mortgage or purchaser reasonably requested
financial information; (i) Authority. Tenant represents and warrants that (a) Tenant is duly organized, validly existing and legally authorized to do business in the Commonwealth of Pennsylvania, and (b) the persons executing
this Lease are duly authorized to execute and deliver this Lease on behalf of Tenant; (j) Attorneys’ Fees. In connection with any litigation arising out of this Lease, the prevailing party, Landlord or Tenant, shall be entitled to
recover all costs incurred, including reasonable attorneys’ fees. 
 27. CONSENT TO JURISDICTION. Tenant hereby consents to the
exclusive jurisdiction of the state courts located in Montgomery County and to the federal courts located in the Eastern District of Pennsylvania. 
 28. AMENDMENT TO EXISTING LEASE 
 (a) Under the Existing Lease, the Premises consist of 43,072 square feet. Within a
reasonable time hereafter, Tenant shall, working in connection with its architect or space planner, determine the square footage of the Premises to be leased under Articles 1 through 27 hereof and communicate such square footage to Landlord in
writing. The square footage to be leased by Tenant pursuant to Articles 1 through 27 hereof shall be known for purposes of this Article 28 and the Existing Lease as the “Premises” and the remainder of the 43,072 square feet shall be known
as the “Give Back Space” 
 (b) Upon final determination of the Premises and Give Back Space, Tenant shall make available to
Landlord the Give Back Space in broom clean condition free of all of Tenant’s personal property and Landlord shall demolish the interior finishes of such Give Back Space to “vanilla shell” condition and thereafter market such Give
Back Space for tenancy. In the event Landlord is successful in leasing all or a portion of the Give Back Space to a third party (“Released Space”), upon execution of a lease or other agreement for the Released Space, the Existing Lease
shall terminate as to such Released Space and rent under the Existing Lease shall be reduced pro rata for the remainder of the Existing Lease term to reflect the decrease of square footage under the Existing Lease. Such termination and rental
reduction shall be evidenced by a notice sent to Tenant by Landlord notifying Tenant of the execution of a lease or other document for the Released Space. 
 (c) In order to assist in the marketing efforts for the Building, Landlord shall renovate the lobby portion of the Building. 
 (d) Landlord shall demise and construct the Premises in accordance with a plan to be provided to Landlord by Tenant (“Landlord Work”). Landlord shall only be responsible for $25.00 per square foot of the
Premises (“Allowance”) for the Landlord Work, which Allowance shall be applied toward the costs of space planning, demise and fitout of the Premises. Tenant shall be solely responsible for all costs of the Landlord’s Work in excess of
the Allowance and shall pay such costs within thirty days of written invoice. Landlord shall provide to Tenant a Fixed Rent credit during calendar year 2006, which credit shall be equal to the difference in the cost of the Landlord Work and the
Allowance. Landlord acknowledges that Tenant has experienced issues with the existing HVAC in the Premises. Landlord shall provide to Tenant a condition report for the existing HVAC equipment and shall make, at Landlord’s sole cost, those
repairs to the roof top unit equipment as specified in such report. Tenant is hereby authorized to use the Allowance toward redesigning the HVAC distribution system and controls and zoning systems in the Premises to meet its needs. 
 (e) Except as expressly amended by this Article 28, the terms and conditions set forth in the Existing Lease remain in full force and effect through
March 31, 2006. 
  

 8 

 IN WITNESS WHEREOF, the parties hereto have executed this Lease, under Seal, the day and year first above
written. 
  

									
	WITNESS:	  		 	 LANDLORD:
 BRANDYWINE OPERATING
PARTNERSHIP, L.P.

					
		 		  		 	By:	 	Brandywine Realty Trust,
		 		  		 		 	its general partner
				
	  
	  		 	By:	 	 /s/ Philip M. Schenkel

		 		  		 	Name	 	Philip M. Schenkel
		 		  		 	Title	 	Regional Vice President
			
	ATTEST:	  		 	 TENANT:
 INTERNATIONAL MILL SERVICE,
INC.

					
		 	  
	  		 	By:	 	 /s/ John P. Carroll

	Name:	 		  		 	Name:	 	John P. Carroll
	Title:	 	Secretary	  		 	Title:	 	SVP, Human Resources

 IF THIS LEASE IS NOT SIGNED BY TENANT BY
                                    , 2005, IT WILL
AUTOMATICALLY BECOME NULL AND VOID. 
  

 9 

 EXHIBIT “A” 
 SPACE PLAN 

 EXHIBIT “B” 
  

	
	Tenant:                                     
                                      
 
	Premises:                                     
                                   
	                                      
                                        
            
	Square
Footage:                                      
                      
	Suite
Number:                                       
                         

 CONFIRMATION OF LEASE TERM 
 THIS MEMORANDUM is made as of the          day of
                    , 2006, between BRANDYWINE OPERATING PARTNERSHIP, L.P., a Delaware limited partnership], with an office at 401 Plymouth
Road, Suite 500, Plymouth Meeting, PA 19462 (“Landlord”) and INTERNATIONAL MILL SERVICE, INC., with its principal place of business at 1155 Business Center Drive, Horsham, Pennsylvania (“Tenant”), who entered into a lease dated
for reference purposes as of                     , 200    , covering certain premises located at 1155 Business
Center Drive, Horsham, Pennsylvania. All capitalized terms, if not defined herein, shall be defined as they are defined in the Lease. 
 1.
The Parties to this Memorandum hereby agree that the date of April 1, 2006 is the “Commencement Date” of the Term and the date March 31, 2011 is the expiration date of the Lease. 
 2. Tenant hereby confirms the following: 
 (a) The Premises contain                      rentable square feet 
 (b) That it has accepted possession of the Premises pursuant to the terms of the Lease; 
 (c) That the improvements, including the Landlord Work, required to be furnished according to the Lease by Landlord have been substantially completed;

 (d) That Landlord has fulfilled all of its duties of an inducement nature or are otherwise set forth in the Lease except that Tenant shall
be entitled to a Fixed Rent Credit in calendar year 2006 in the amount of $            ; 
 (e) That there are no offsets or credits against rentals, and the $              Security Deposit has been paid as provided in the Lease; 

(f) That there is no default by Landlord or Tenant under the Lease and the Lease is in full force and effect. 
 (g) Fixed Rent shall be as follows: 
  

								
	 LEASE YEAR
	  	PER R.S.F.	 	 	INSTALLMENTS	  	FIXED RENT
	 Months 1-12
	  	$19.50, 	*	 	$            	  	$            
				
	 Months 13-24
	  	$20.00, 	*	 	$            	  	$            
				
	 Months 25-36
	  	$20.50, 	*	 	$            	  	$            
				
	 Months 37-48
	  	$21.00, 	*	 	$            	  	$            
				
	 Months 49-60
	  	$21.50, 	*	 	$            	  	$            

 3. Landlord hereby confirms to Tenant that its Building Number is 115 and its Lease Number is
            . This information must accompany each Rent check or wire payment. 
  

			
	4. Tenant’s Notice Address is:	  	Tenant’s Billing Address is:
		
	                                      
                                        
                       	  	                                      
                                        
                   
	                                      
                                        
                     	  	                                      
                                        
                   
	                                      
                                        
                     	  	                                      
                                        
                   
	Attn:                                     
                                        
             	  	Attn:                                     
                                        
           
	Phone
No.:                                       
                                        
 	  	Phone No.:                                    
                                       
   
	Fax
No.:                                       
                                        
      	  	Fax No.:                                    
                                        
        
	E-mail:                                     
                                        
           	  	E-mail:                                     
                                        
         

 4. This Memorandum, each and all of the provisions hereof, shall inure to the benefit, or bind, as
the case may require, the parties hereto, and their respective successors and assigns, subject to the restrictions upon assignment and subletting contained in the Lease. 
  

							
	WITNESS:	 		 	LANDLORD:
		 		 	BRANDYWINE OPERATING PARTNERSHIP, L.P.
				
		 		 	By:	 	Brandywine Realty Trust, its general partner
				
	  
	 		 	By:	 	  

			
	WITNESS:	 		 	 TENANT:
 INTERNATIONAL MILL SERVICE,
INC.

				
	  
	 		 	By:	 	  

 EXHIBIT “C” 
 CLEANING SPECIFICATION 
 Landlord shall provide Tenant with janitorial services for the Premises
Monday through Friday of each week in accordance with the guidelines set forth in Exhibit “C” attached hereto and the Tenant shall pay its Share of the cost thereof as Additional Rent as provided in Article 4 hereof.

 DAILY: BUILDING AND TENANT AREAS 
 1.
All desks and other furniture will be dusted with specially treated dust clothes. 
 2. All windowsills, chair rails, baseboards, moldings,
partitions and picture frames that are less than six feet in height will be hand dusted and wiped clean. 
 3. All non-carpeted floors will
be dust mopped with specially treated dust mops. 
 4. All bright metal work will be maintained and kept in a clean and polished condition.

 5. All drinking fountains will be thoroughly cleaned and sanitized. 
 6. All stairways will be swept and wet mopped. Stairways shall be policed daily to remove all debris. Walls, handrails and fixtures are to be spot
cleaned and dusted. Lights, pipes and signage are to be dusted as necessary. 
 7. All elevators will be vacuumed and the interior of all
cabs will be wiped clean and all metal hardware will be polished. This includes damp wipe, dust and/or thoroughly cleaning all exterior doors, cab walls, doorframes, indicator panels, tracts, plates and grooves. 
 8. Empty, clean and dust all wastepaper baskets, ashtrays, receptacles, etc. After emptying waste baskets, reline with an approved liner as needed.

 9. Remove all trash and wastepaper to areas designated by Management. 
 10. Vacuum all carpeted areas. This shall include all walk-off mats. In addition, the carpets are to be spot cleaned when necessary. 
 11. All tile floors will maintain a satin finish. Hard surface floor areas shall be maintained in a manner which consistently presents the appearance
desired without visible evidence of traffic patterns. Particular attention shall be paid to edges to ensure a proper and dust free appearance. Any damage to hard surface floors resulting from improper care shall be the full responsibility of
Contractor. Contractor shall provide the details of a program to maintain tile floors to insure consistent luster and remove all marks. 
 12. All glass surfaces, windows, doors and directory boards shall be spot-cleaned, using an approved glass cleaner, and all glass shall be left in a bright condition which is free of streaks and dust. 
 13. Wipe and clean all counters, tables, chairs and appliances in kitchen areas. 
 14. Clean all glass at the building and tenant entrances. 
 15. Spot clean all horizontal and vertical surfaces removing fingerprints, smudges and stains. 
 LAVATORIES

 1. Floors are to be swept and washed using an approved antiseptic liquid detergent. Floors are to be machine scrubbed as needed but not
less frequently than every quarter. 
 2. Refill all dispensers, empty trash, clean and sanitize all restroom fixtures. Wipe all counters,
clean mirrors, wipe chrome and spot wipe partitions and ceramic tile walls. 
 3. Weekly wash all restroom partitions on both sides.

 4. Remove all wastepaper and refuse. 
 5. No less frequently than quarterly, wash all ceramic tile walls. 
 WEEKLY 
 1. Remove fingerprints, smudges and scuff marks from all vertical and horizontal surfaces such as doors, walls and sills. 
 2. Wash and refinish resilient floors in public areas. Strip, wax and polish the floors as needed. 
 3. Polish and buff all no wax resilient floors in tenant areas. 
 4. Dust and damp wipe all louvers and ceiling grills. 
 5. Spot clean all interior partition glass windows
and clean all interior glass entrance doors. 
 QUARTERLY 
 1. Dust and clean all vertical surfaces such as walls, partitions, doors, etc. that are not cleaned during the nightly cleaning process. 
 2. Dust and wipe clean all blinds. 
 3. Dust the inside of elevator telephone cabinets. 
 4. Shampoo all elevator carpets. 

 EXHIBIT “D” 
 BUILDING RULES AND REGULATIONS 
 LAST REVISION: December 17, 2003 
 Landlord reserves the right to rescind any of these rules and make such other and further rules and regulations as in the judgment of Landlord shall from
time to time be needed for the safety, protection, care and cleanliness of the Project, the operations thereof, the preservation of good order therein and the protection and comfort of its tenants, their agents, employees and invitees, which rules
when made and notice thereof given to Tenant shall be binding upon him, her or it in a like manner as if originally prescribed. 
  

	1.	Sidewalks, entrances, passages, elevators, vestibules, stairways, corridors, halls, lobby and any other part of the Building shall not be obstructed or encumbered by any Tenant or
used for any purpose other than ingress or egress to and from each tenant’s premises. Landlord shall have the right to control and operate the common portions of the Building and exterior facilities furnished for common use of the tenants (such
as the eating, smoking, and parking areas) in such a manner as Landlord deems appropriate. 

  

	2.	No awnings or other projections shall be attached to the outside walls of the Building without the prior written consent of Landlord. All drapes, or window blinds, must be of a
quality, type and design, color and attached in a manner approved by Landlord. 

  

	3.	No showcases or other articles shall be put in front of or affixed to any part of the exterior of the Building, or placed in hallways or vestibules without prior written consent of
Landlord. 

  

	4.	Restrooms and other plumbing fixtures shall not be used for any purposes other than those for which they were constructed and no debris, rubbish, rags or other substances shall be
thrown therein. Only standard toilet tissue may be flushed in commodes. All damage resulting from any misuse of these fixtures shall be the responsibility of the tenant who, or whose employees, agents, visitors, clients, or licensees shall have
caused same. 

  

	5.	No tenant, without the prior consent of Landlord, shall mark, paint, drill into, bore, cut or string wires or in any way deface any part of the Premises or the Building of which
they form a part except for the reasonable hanging of decorative or instructional materials on the walls of the Premises. 

  

	6.	Tenants shall not construct or maintain, use or operate in any part of the project any electrical device, wiring or other apparatus in connection with a loud speaker system or other
sound/communication system which may be heard outside the Premises. Any such communication system to be installed within the Premises shall require prior written approval of Landlord. 

  

	7.	No mopeds, skateboards, scooters or other vehicles and no animals, birds or other pets of any kind shall be brought into or kept in or about the Building other than a service animal
performing a specified task. 

  

	8.	No tenant shall cause or permit any unusual or objectionable odors to be produced upon or permeate from its premises. 

  

	9.	No space in the Building shall be used for the manufacture of goods for sale in the ordinary course of business, or for sale at auction of merchandise, goods or property of any
kind. 

  

	10.	No tenant, or employees of tenant, shall make any unseemly or disturbing noises or disturb or interfere with the occupants of this or neighboring buildings or residences by voice,
musical instrument, radio, talking machines, or in any way. All passage through the Building’s hallways, elevators, and main lobby shall be conducted in a quiet, business-like manner. Skateboarding, rollerblading and rollerskating shall not be
permitted in the Building or in the common areas of the Project. 

  

	11.	No tenant shall throw anything out of the doors, windows, or down corridors or stairs of the Building. 

  

	12.	Tenant shall not place, install or operate on the Premises or in any part of the Project, any engine, stove or machinery or conduct mechanical operations or cook thereon or therein
(except for coffee machine, microwave oven, toasters and/or vending machine), or place or use in or about the Premises or Project any explosives, gasoline, kerosene oil, acids, caustics or any other flammable, explosive, or hazardous material
without prior written consent of Landlord. 

  

	13.	No smoking is permitted in the Building, including but not limited to the Premises, rest rooms, hallways, elevators, stairs, lobby, exit and entrances vestibules, sidewalks, parking
lot area except for the designated exterior smoking area. All cigarette ashes and butts are to be deposited in the containers provided for same, and not disposed of on sidewalks, parking lot areas, or toilets within the Building rest rooms.

  

	14.	Tenants are not to install any additional locks or bolts of any kind upon any door or window of the Building without prior written consent of Landlord. Each tenant must, upon the
termination of tenancy, return to the Landlord all keys for the Premises, either furnished to or otherwise procured by such tenant, and all security access cards to the Building. 

	15.	All doors to hallways and corridors shall be kept closed during business hours except as they may be used for ingress or egress. 

  

	16.	Tenant shall not use the name of the Building, Project or Landlord in any way in connection with his business except as the address thereof. Landlord shall also have the right to
prohibit any advertising by tenant, which, in its sole opinion, tends to impair the reputation of the Building or its desirability as a building for offices, and upon written notice from Landlord, tenant shall refrain from or discontinue such
advertising. 

  

	17.	Tenants must be responsible for all security access cards issued to them, and to secure the return of same from any employee terminating employment with them. Lost cards shall cost
$35.00 per card to replace. No person/company other than Building tenants and/or their employees may have security access cards unless Landlord grants prior written approval. 

  

	18.	All deliveries by vendors, couriers, clients, employees or visitors to the Building which involve the use of a hand cart, hand truck, or other heavy equipment or device must be made
via the Freight Elevator, if such Freight Elevator exists in the Building. Tenant shall be responsible to Landlord for any loss or damage resulting from any deliveries made by or for tenant to the Building. Tenant shall procure and deliver a
certificate of insurance from tenant’s movers which certificate shall name Landlord as an additional insured. 

  

	19.	Landlord reserves the right to inspect all freight to be brought into the Building, and to exclude from the Building all freight or other material which violates any of these rules
and regulations. 

  

	20.	Tenant will refer all contractors, contractor’s representatives and installation technicians, rendering any service on or to the premises for tenant, to Landlord for
Landlord’s approval and supervision before performance of any contractual service or access to Building. This provision shall apply to all work performed in the Building including installation of telephones, telegraph equipment, electrical
devices and attachments and installations of any nature affecting floors, walls, woodwork, trim, windows, ceilings, equipment or any other physical portion of the Building. Landlord reserves right to require that all agents of contractors/vendors
sign in and out of the Building. 

  

	21.	Landlord reserves the right to exclude from the Building at all times any person who is not known or does not properly identify himself to Landlord’s management or security
personnel. 

  

	22.	Landlord may require, at its sole option, all persons entering the Building after 6 PM or before 7 AM, Monday through Friday and at any time on Holidays, Saturdays and Sundays, to
register at the time they enter and at the time they leave the Building. 

  

	23.	No space within the Building, or in the common areas such as the parking lot, may be used at any time for the purpose of lodging, sleeping, or for any immoral or illegal purposes.

  

	24.	No employees or invitees of tenant shall use the hallways, stairs, lobby, or other common areas of the Building as lounging areas during “breaks” or during lunch periods.

  

	25.	No canvassing, soliciting or peddling is permitted in the Building or its common areas by tenants, their employees, or other persons. 

  

	26.	No mats, trash, or other objects shall be placed in the public corridors, hallways, stairs, or other common areas of the Building. 

  

	27.	Tenant must place all recyclable items of cans, bottles, plastic and office recyclable paper in appropriate containers provided by Landlord in each tenant’s space. Removal of
these recyclable items will be by Landlord’s janitorial personnel. 

  

	28.	Landlord does not maintain suite finishes which are non-standard, such as kitchens, bathrooms, wallpaper, special lights, etc. However, should the need arise for repair of items not
maintained by Landlord, Landlord at its sole option, may arrange for the work to be done at tenant’s expense. 

  

	29.	Drapes installed by tenant, which are visible from the exterior of the Building, must be cleaned by Tenant, at its own expense, at least once a year. 

  

	30.	No pictures, signage, advertising, decals, banners, etc. are permitted to be placed in or on windows in such a manner as they are visible from the exterior, without the prior
written consent of Landlord. 

  

	31.	Tenant or tenant’s employees are prohibited at any time from eating or drinking in hallways, elevators, rest rooms, lobby or lobby vestibules. 

  

	32.	Tenant shall be responsible to Landlord for any acts of vandalism performed in the Building by its employees, agents, invitees or visitors. 

	33.	No tenant shall permit the visit to its Premises of persons in such numbers or under such conditions as to interfere with the use and enjoyment of the entrances, hallways,
elevators, lobby or other public portions or facilities of the Building and exterior common areas by other tenants. 

  

	34.	Landlord’s employees shall not perform any work or do anything outside of their regular duties unless under special instructions from Landlord. Requests for such requirements
must be submitted in writing to Landlord. 

  

	35.	Tenant agrees that neither tenant nor its agents, employees, licensees or invitees will interfere in any manner with the installation and/or maintenance of the heating, air
conditioning and ventilation facilities and equipment. 

  

	36.	Landlord will not be responsible for lost or stolen personal property, equipment, money or jewelry from tenant’s area or common areas of the Project regardless of whether such
loss occurs when area is locked against entry or not. 

  

	37.	Landlord will not permit entrance to tenant’s Premises by use of pass key controlled by Landlord, to any person at any time without written permission of tenant, except
employees, contractors or service personnel supervised or employed by Landlord. 

  

	38.	Tenant and its agents, employees and invitees shall observe and comply with the driving and parking signs and markers on the Building grounds and surrounding areas.

  

	39.	Tenant and its employees, invitees, agents, etc. shall not enter other separate tenants’ hallways, restrooms or premises unless they have received prior approval from
Landlord’s management. 

  

	40.	Tenant shall not use or permit the use of any portion of the Premises for outdoor storage. 

 ***********Form of Omnibus Agreement

 Exhibit 10.3 
 OMNIBUS AGREEMENT 
 THIS OMNIBUS AGREEMENT (“Agreement”) is entered into on, and effective
as of, the                     , 2007 and is by and between SemGroup, L.P. (“Parent”), SemManagement, L.L.C. (“Management
Company”), SemGroup Energy Partners, L.P. (“Partnership”) and SemGroup Energy Partners G.P., L.L.C. (“General Partner”). The above-named entities are sometimes referred to in this Agreement each as a “Party” and
collectively as the “Parties.” 
 R E C I T A L S: 
 1. The Parties desire by their execution of this Agreement to evidence their understanding, as more fully set forth in Article II, with respect to
certain indemnification obligations of the Parties to each other. 
 2. The Parties desire by their execution of this Agreement to evidence
their understanding, as more fully set forth in Article III, with respect to the amount to be paid by the Partnership for Operational Services and G&A Services to be provided by Parent and its Affiliates (each as defined herein) to the
Partnership and its Affiliates. 
 In consideration of the premises and the covenants, conditions, and agreements contained herein, and for
other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the Parties hereto hereby agree as follows: 
 ARTICLE I 
 DEFINITIONS 
 1.1 Definitions. 
 As used in this Agreement, the following terms shall have the
respective meanings set forth below: 
 “Administrative Fee” is defined in Section 3.3(a). 

 “Affiliate” is defined in the Partnership Agreement. 
 “Agreement” is defined in the introductory paragraph of this Agreement. 
 “Applicable Period” is defined in Section 3.1. 
 “Assets” means all assets conveyed, contributed, or otherwise transferred by the Parent Entities to the Partnership Group prior to or on the Closing Date, including any such assets held by a Person
whose ownership interests are transferred by the Parent Entities to the Partnership Group prior to or on the Closing Date by means of operation of law or otherwise. 
 “Cause” is defined in the Partnership Agreement. 
 “Change of Control”
means, with respect to any Person (the “Applicable Person”), any of the following events: (i) any sale, lease, exchange or other transfer (in one transaction or a series of related transactions) of all or substantially all of the
Applicable Person’s assets to any other Person, unless immediately following such sale, lease, exchange or other transfer such assets are owned, directly or indirectly, by the Applicable Person; (ii) the dissolution or liquidation of the
Applicable Person; (iii) the consolidation or merger of the Applicable Person with or into another Person, other than any such transaction where (a) the outstanding Voting Securities of the Applicable Person are changed into or exchanged
for Voting Securities of the surviving Person or its parent and (b) the holders of the Voting Securities of the Applicable Person immediately prior to such transaction own, directly or indirectly, not less than a majority of the outstanding
Voting Securities of the surviving Person or its parent immediately after such transaction; and (iv) a “person” or “group” (within the meaning of Sections 13(d) or 14(d)(2) of the Exchange Act) being or becoming the
“beneficial owner” (as defined in Rules 13d-3 and 13d-5 under the Exchange Act) of more than 50% of all of the then outstanding Voting Securities of the Applicable Person, except in a merger or consolidation which would not constitute a
Change of Control under clause (iii) above. 
  

 2 

 “Closing Date” means the date of the closing of the Partnership’s initial public
offering of Common Units. 
 “Common Units” is defined in the Partnership Agreement. 
 “Conflicts Committee” is defined in the Partnership Agreement. 
 “Contribution Agreement” means that certain Contribution, Conveyance and Assumption Agreement, dated as of
                    , 2007, between the Parent Entities and the Partnership Group, together with the additional conveyance documents and
instruments contemplated or referenced thereunder. 
 “Control” means the possession, directly or indirectly, of the power
to direct or cause the direction of the management and policies of a Person, whether through ownership of voting securities, by contract, or otherwise. 
 “Covered Environmental Losses” is defined in Section 2.1(a). 
 “Environmental
Laws” means all federal, state and local laws, statutes, rules, regulations, orders and ordinances, legally enforceable requirements and rules of common law, now or hereafter in effect, relating to the protection of the environment
(including, but not limited to, any natural resource damages, any generation, use, storage, treatment, Release or threatened Release of Hazardous Substances into the indoor or outdoor environment, and any exposure of any Person or property to
Hazardous Substances) including, without limitation, the federal Comprehensive Environmental Response, Compensation, and Liability Act, the Superfund Amendments Reauthorization Act, the Resource Conservation and Recovery Act, the Clean Air Act, the
Federal Water Pollution Control Act, the Toxic Substances Control Act, the Oil Pollution Act, the Safe Drinking Water Act, the Hazardous Materials Transportation Act and all other environmental conservation and protection laws, each as amended from
time to time. 
 “Exchange Act” means the Securities Exchange Act of 1934, as amended. 
  

 3 

 “G&A Services” is defined in Section 3.1. 
 “General Partner” means SemGroup Energy Partners G.P., L.L.C. 
 “Hazardous Substance” means (a) any substance that is designated, defined or classified as a hazardous waste, hazardous material,
pollutant, contaminant or toxic or hazardous substance or words of similar meaning or impact, or that is otherwise regulated or as to which liability may arise under any Environmental Law, including, without limitation, any hazardous substance as
such term is defined under the Comprehensive Environmental Response, Compensation, and Liability Act, as amended, (b) petroleum, petroleum products, crude oil, oil, gasoline, natural gas, fuel oil, motor oil, waste oil, diesel fuel, jet fuel,
and other petroleum hydrocarbons, whether refined or unrefined and (c) asbestos, whether in a friable or non-friable condition, polychlorinated biphenyls or radon. 
 “Indemnified Party” means either the Partnership or Parent, as the case may be, each in its capacity as a party entitled to indemnification in accordance with Article II. 
 “Indemnifying Party” means either the Partnership or Parent, as the case may be, each in its capacity as a party from whom
indemnification may be sought in accordance with Article II. 
 “Limited Partner” is defined in the Partnership Agreement.

 “Parent Entities” means Parent and any Person (other than Partnership Group Members) Controlled, directly or indirectly,
by Parent; and “Parent Entity” means any of the Parent Entities. 
 “Operational Services” is defined in
Section 3.1. 
 “Partnership Agreement” means the First Amended and Restated Agreement of Limited Partnership of
SemGroup Energy Partners, L.P., dated as of                     , 2007, to which reference is hereby made for all purposes of this Agreement.
No amendment or modification to 

  

 4 

 
the Partnership Agreement subsequent to
                    , 2007 shall be given effect for the purposes of this Agreement unless consented to by each of the Parties to this
Agreement. 
 “Partnership Group” means the General Partner, Partnership and each entity directly or indirectly owned by
Partnership and the General Partner; and “Partnership Group Member” means any member of the Partnership Group. 
 “Party” and “Parties” are defined in the introductory paragraph of this Agreement. 
 “Person” means an individual or a corporation, limited liability company, partnership, joint venture, trust, unincorporated organization, association, government body or agency or political subdivision thereof or other
entity. 
 “Release” means any depositing, spilling, leaking, pumping, pouring, placing, emitting, discarding, abandoning,
emptying, discharging, migrating, injecting, escaping, leaching, dumping or disposing. 
 “Retained Assets” means the
terminals, pipelines, trucks and other assets and investments owned by any of the Parent Entities as of the date of this Agreement that were not conveyed, contributed or otherwise transferred to the Partnership Group pursuant to the Contribution
Agreement including, without limitation, replacements and natural extensions of any Retained Assets. 
 “Risk-Based Cleanup
Criteria” are a risk-based cleanup criteria authorized under applicable Environmental Law for remediation of a particular property, taking into consideration any Partnership Group Member’s use of the property being remediated and, if
such property is not owned by the Partnership Group, any contractual or other requirements imposed by the property owner. 
 “Throughput Agreement” means the Throughput Agreement dated as of                     , 2007 between and among
various entities of the Partnership Group and the Parent Entities. 
  

 5 

 “Toxic Tort” means a claim or cause of action arising from personal injury or property
damage incurred by the plaintiff that is alleged to have been caused by exposure to, or contamination by, Hazardous Substances that have been or are threatened to be Released into the environment by or as a result of the actions or omissions of the
defendant. 
 “Transfer”, including the correlative terms “Transferring” or “Transferred”,
means any direct or indirect transfer, assignment, sale, gift, pledge, hypothecation or other encumbrance, or any other disposition (whether voluntary, involuntary or by operation of law) of any assets, property or rights. 
 “Units” is defined in the Partnership Agreement. 
 “Voluntary Cleanup Program” means a program of the United States or a state of the United States enacted pursuant to Environmental Laws which provides for a mechanism for the written approval of, or
authorization to conduct, voluntary remedial action for the clean-up, removal or remediation of contamination that exceeds actionable levels established pursuant to Environmental Laws. 
 “Voting Securities” of a Person means securities of any class of such Person entitling the holders thereof to vote in the election of,
or to appoint, members of the board of directors or other similar governing body of the Person; provided, that if such Person is a limited partnership, Voting Securities of such Person shall be the general partner interest in such Person.

 ARTICLE II 
 INDEMNIFICATION 
 2.1 Environmental Indemnification. 
 (a) Subject to Section 2.2, Parent shall indemnify, defend and hold harmless the Partnership Group for a period of five years after
the Closing Date from and against 

  

 6 

 
environmental and Toxic Tort losses, damages (including, without limitation, real property damages and natural resource damages), injuries (including,
without limitation, personal injury and death), liabilities, claims, demands, breaches of contracts, causes of action, judgments, settlements, fines, penalties, costs and expenses (including, without limitation, supplemental environmental project
costs, court costs and reasonable attorney’s and expert’s fees) of any and every kind or character, known or unknown, fixed or contingent, suffered or incurred by the Partnership Group by reason of or arising out of: 
 (i) any violation, or correction of any violation, of Environmental Laws associated with the ownership or operation of the Assets, or

 (ii) any event or condition associated with the ownership or operation of the Assets (including, without limitation, the
presence of Hazardous Substances on, under, about or being Released to or from the Assets or the Release of Hazardous Substances generated by the operation of the Assets at non-Asset locations) including, without limitation, (A) the cost and
expense of any investigation, assessment, evaluation, monitoring, containment, cleanup, abatement, repair, restoration, remediation, or other corrective action required or necessary under Environmental Laws, using Risk-Based Cleanup Criteria, if
applicable, or to satisfy any applicable Voluntary Cleanup Program, using Risk-Based Cleanup Criteria, if applicable, (B) the cost or expense of the preparation and implementation of any closure, remedial, corrective action, or other plans
required or necessary under Environmental Laws, using Risk-Based Cleanup Criteria, if applicable, or to satisfy any applicable Voluntary Cleanup Program, using Risk-Based Cleanup Criteria, if applicable, and (C) the cost and expense for any
environmental or Toxic Tort pre-trial, trial, or appellate legal or litigation support work; but only to the 

  

 7 

 
extent that such violation complained of under Section 2.1(a)(i) or such events or conditions included under Section 2.1(a)(ii) occurred or existed
on or before the date of this Agreement (collectively, “Covered Environmental Losses”). 
 (b) The Partnership Group
shall jointly and severally indemnify, defend and hold harmless the Parent Entities from and against environmental and Toxic Tort losses, damages (including, without limitation, real property damages and natural resource damages), injuries
(including, without limitation, personal injury and death), liabilities, claims, demands, breaches of contracts, causes of action, judgments, settlements, fines, penalties, costs and expenses (including, without limitation, supplemental
environmental project costs, court costs and reasonable attorney’s and expert’s fees) of any and every kind or character, known or unknown, fixed or contingent, suffered or incurred by the Parent Entities by reason of or arising out of:

 (i) any violation or correction of any violation of Environmental Laws associated with the ownership or operation of the
Assets, or 
 (ii) any event or condition associated with the ownership or operation of the Assets (including, without
limitation, the presence of Hazardous Substances on, under, about or Releasing to or from the Assets or the Release of Hazardous Substances generated by the operation of the Assets at non-Asset locations) including, without limitation, (A) the
cost and expense of any investigation, assessment, evaluation, monitoring, containment, cleanup, abatement, repair, restoration, remediation, or other corrective action required or necessary under Environmental Laws, (B) the cost or expense of
the preparation and implementation of any closure, remedial, corrective action, or other plans required or necessary under Environmental Laws, and (C) the cost 

  

 8 

 
and expense for any environmental or Toxic Tort pre-trial, trial, or appellate legal or litigation support work; in each case only to the extent that such
violation complained of under Section 2.1(b)(i) or such events or conditions included under Section 2.1(b)(ii) occurred or existed after the date of this Agreement, and to the extent that any of the foregoing are not Covered Environmental
Losses for which the Partnership Group is entitled to indemnification from Parent under this Article II. 
 2.2 Limitations
Regarding Environmental Indemnification. The aggregate liability of Parent in respect of all Covered Environmental Losses under Section 2.1(a) shall not exceed $7,500,000. Parent shall not have any obligation under Section 2.1(a)
until the Covered Environmental Losses of the Partnership Group exceed $250,000, and then only to the extent such aggregate Covered Environmental Losses exceed $250,000. Notwithstanding anything herein to the contrary, in no event shall Parent have
any indemnification obligations under Section 2.1(a) for claims made as a result of additions to or modifications of Environmental Laws promulgated after the Closing Date. 
 2.3 Additional Indemnification of Partnership by Parent. 
 (a) Parent shall indemnify, defend and hold harmless the Partnership Group for a period of five years after the Closing Date from and
against any losses, damages, liabilities, claims, demands, causes of action, judgments, settlements, fines, penalties, costs, and expenses (including, without limitation, court costs and reasonable attorney’s and expert’s fees) of any and
every kind or character, known or unknown, fixed or contingent, suffered or incurred by the Partnership Group by reason of or arising out of (i) the failure of the applicable Partnership Group Member to be the owner of such valid and
indefeasible easement rights or fee ownership interests in and to the lands on which any terminal, pipeline or related equipment conveyed or 

  

 9 

 
contributed or otherwise Transferred (including by way of a Transfer of the ownership interest of a Person or by operation of law) to the applicable
Partnership Group Member on the date of this Agreement is located as of the Closing Date; (ii) the failure of the applicable Partnership Group Member to have the consents, licenses and permits necessary to allow any such pipeline referred to in
clause (i) of this Section 2.3(a) to cross the roads, waterways, railroads and other areas upon which any such pipeline is located as of the Closing Date; (iii) the failure of the applicable Partnership Group Member to have any
consent or governmental permit necessary to allow the transfer of any Asset to such Partnership Group Member on the date of this Agreement and (iv) the cost of curing any condition set forth in clause (i), (ii) or (iii) above that
does not allow any Asset to be operated in accordance with customary industry practice. 
 (b) In addition to and not in
limitation of the indemnification provided under Sections 2.1(a) and 2.2(a), Parent shall indemnify, defend, and hold harmless the Partnership Group from and against any losses, damages, liabilities, claims, demands, causes of action, judgments,
settlements, fines, penalties, costs, and expenses (including, without limitation, court costs and reasonable attorney’s and expert’s fees) of any and every kind or character, known or unknown, fixed or contingent, suffered or incurred by
the Partnership Group by reason of or arising out of (i) all currently pending legal actions against the Parent Entities, (ii) events and conditions associated with the Retained Assets, whether occurring before or after the Closing Date,
and (iii) all federal, state and local income tax liabilities attributable to the operation of the Assets prior to the Closing Date, including any such income tax liabilities of the Parent Entities that may result from the consummation of the
formation transactions for the Partnership Group and the General Partner to the extent that Parent is notified in writing of such tax claims within three months after the date of the expiration of the applicable statute of limitations. 

 

 10 

 2.4 Additional Indemnification of Parent by Partnership. In addition to and not in
limitation of the indemnification provided under Section 2.1(b) or the Partnership Agreement, the Partnership Group shall jointly and severally indemnify, defend, and hold harmless the Parent Entities from and against any losses, damages,
liabilities, claims, demands, causes of action, judgments, settlements, fines, penalties, costs, and expenses (including, without limitation, court costs and reasonable attorney’s and expert’s fees) of any and every kind or character,
known or unknown, fixed or contingent, suffered or incurred by the Parent Entities by reason of or arising out of events and conditions associated with the operation of the Assets and occurring on or after the Closing Date (other than Covered
Environmental Losses, which are provided for under Section 2.1), unless such indemnification would not be permitted under the Partnership Agreement by reason of one of the provisos contained in Section 7.7(a) of the Partnership Agreement.

 2.5 Indemnification Procedures. 
 (a) The Indemnified Party agrees that promptly after it becomes aware of facts giving rise to a claim for indemnification under this
Article II, it will provide notice thereof in writing to the Indemnifying Party, specifying the nature of and specific basis for such claim. 
 (b) The Indemnifying Party shall have the right to control all aspects of the defense of (and any counterclaims with respect to) any claims brought against the Indemnified Party that are covered by the indemnification
under this Article II, including, without limitation, the selection of counsel, determination of whether to appeal any decision of any court and the settling of any such matter or any issues relating thereto; provided, however, that no such
settlement shall be entered into without the consent of the Indemnified Party unless it includes a full release of the Indemnified Party from such matter or issues, as the case may be, and does not 

  

 11 

 
include the admission of fault, culpability or a failure to act, by or on behalf of such Indemnified Party. 
 (c) The Indemnified Party agrees to cooperate fully with the Indemnifying Party, with respect to all aspects of the defense of any claims
covered by the indemnification under this Article II, including, without limitation, the prompt furnishing to the Indemnifying Party of any correspondence or other notice relating thereto that the Indemnified Party may receive, permitting the name
of the Indemnified Party to be utilized in connection with such defense, the making available to the Indemnifying Party of any files, records or other information of the Indemnified Party that the Indemnifying Party considers relevant to such
defense and the making available to the Indemnifying Party of any employees of the Indemnified Party; provided, however, that in connection therewith the Indemnifying Party agrees to use reasonable efforts to minimize the impact thereof on the
operations of the Indemnified Party and further agrees to maintain the confidentiality of all files, records, and other information furnished by the Indemnified Party pursuant to this Section 2.5. In no event shall the obligation of the
Indemnified Party to cooperate with the Indemnifying Party as set forth in the immediately preceding sentence be construed as imposing upon the Indemnified Party an obligation to hire and pay for counsel in connection with the defense of any claims
covered by the indemnification set forth in this Article II; provided, however, that the Indemnified Party may, at its own option, cost and expense, hire and pay for counsel in connection with any such defense. The Indemnifying Party agrees to
keep any such counsel hired by the Indemnified Party informed as to the status of any such defense, but the Indemnifying Party shall have the right to retain sole control over such defense. 
  

 12 

 (d) In determining the amount of any loss, cost, damage or expense for which the
Indemnified Party is entitled to indemnification under this Agreement, the gross amount of the indemnification will be reduced by (i) any insurance proceeds realized by the Indemnified Party and (ii) all amounts recovered by the
Indemnified Party under contractual indemnities from third Persons. For purposes of calculating the aggregate liability of Parent under Section 2.1(a), Parent will be deemed to have incurred any such liability when incurred or paid (and such
liability shall be applied toward the $7,500,000 limitation on liability set forth in Section 2.2), regardless of the status of any insurance claims in respect thereof, and such liability (and the application thereof toward the $7,500,000
limitation on liability set forth in Section 2.2) will be reduced when any insurance proceeds in respect thereof are actually received by Parent to the extent that Parent is not required to pay such proceeds over to any of the Partnership
Entities. 
 (e) The date on which notification of a claim for indemnification is received by the Indemnifying Party shall
determine whether such claim is timely made. 
 ARTICLE III 
 SERVICES 
 3.1 General. During the period beginning on the
date of this Agreement and ending on the earlier of (x) the date the Parent Entities cease to Control the General Partner or (y) the end of the three-year period beginning on the date of this Agreement, (the “Applicable Period”),
the Management Company (or another Parent Entity) will provide (i) general and administrative services, which shall include centralized corporate functions such as legal, accounting, treasury, insurance administration and claims processing,
risk management, health, safety and environmental, information technology, human resources, credit, payroll, internal audit, tax compliance, engineering and marketing (“G&A” Services) and (ii) the services of such 

  

 13 

 
of its employees (“Operational Services”) as are needed to manage and operate the business and Assets of the Partnership Group, as more
particularly described in Section 3.2. 
 3.2 Nature of the Operational Services. 
 (a) In general, the Operational Services provided during the Applicable Period shall be sufficient to allow the Partnership Group to
manage and operate its business and the Assets in substantially the same manner as such business and Assets have been historically managed and operated by the Parent Entities and in accordance with prudent industry practices. During the Applicable
Period, except as otherwise provided in this Agreement, the Partnership Group will satisfy all of its needs for Operational Services through this Agreement. 
 (b) The Operational Services shall also be sufficient to allow the Partnership Group to provide those services it is obligated to provide
under the Throughput Agreement, including the services listed on Attachment A thereto. Pursuant to the Throughput Agreement, the Partnership is obligated to perform various gathering, transportation, terminalling and storage services for the Parent
Entities. 
 (c) In order to achieve the necessary level of Operational Services specified in subsections (a) and
(b) above, it is expected that the Management Company will provide no fewer than 300 Management Company employees who shall spend all or substantially all of their working time performing the Operational Services that are needed in order for
the Partnership Group to manage and operate its business and the Assets, including performing the services that are required under the Throughput Agreement. 
  

 14 

 (d) Management Company employees assigned to work for the Partnership Group pursuant to
this Agreement will perform the services required of the Partnership Group in managing and operating its business and the Assets as directed by and under the exclusive control and supervision of the General Partner. The Parties expressly understand
and agree that the General Partner shall, on behalf of the Partnership Group, have exclusive control over the manner in which its business and the Assets are operated and in which its services are performed. In this regard, Management Company shall
consult with the General Partner regarding how many Management Company employees are needed in order to perform the services that are required to manage and operate the Partnership Group’s business and to properly operate and maintain the
Assets, the identity of Management Company employees who will perform particular services, the activities and functions to be undertaken by such employees in connection with performing such services, the establishment of work schedules in the
performance of such services, the discharge or replacement of employees performing such services, and the hiring of new or additional employees to perform such services. 
 3.3 Administrative Fee. 
 (a) In consideration of the G&A
Services and the services of the executive officers of the General Partner, the Partnership shall pay the Management Company, another Parent Entity or the General Partner, an administrative fee (the “Administrative Fee”) of $5,000,000 per
year (subject to adjustment as specified below) for the Applicable Period, payable in arrears in equal quarterly installments beginning on the last day of the first fiscal quarter of the Partnership ending after the date of this Agreement (prorated
to account for any partial quarterly period). 
  

 15 

 (b) Management Company may increase the Administrative Fee as of the first day of July of
each year beginning with July 1, 2008 by an amount up to the product of the then-current Administrative Fee multiplied by the percentage increase, if any, from the immediately preceding year in the Consumer Price Index — All Urban
Consumers, U.S. City Average, Not Seasonally Adjusted. 
 (c) If the Partnership or any other Partnership Group Member
acquires or constructs additional assets during the Applicable Period, then Management Company shall propose a revised Administrative Fee that covers the provision of G&A Services for such additional assets. If the General Partner, on behalf of
the Partnership Group and with the concurrence of the Conflicts Committee, agrees to such revised Administrative Fee, the Management Company shall provide G&A Services for the additional assets pursuant to the terms set forth herein, and
references herein to the “Assets” shall thereafter include such additional assets. 
 (d) On each anniversary of the
date of this Agreement, the Partnership will have the right to submit to Management Company a proposal to reduce the amount of the Administrative Fee for the current year if the Partnership believes, in good faith, that the G&A Services
performed by the Management Company for the preceding year do not justify payment of the full Administrative Fee for the current year. If the Partnership submits such a proposal to Management Company, Management Company agrees that it will negotiate
in good faith with the Partnership to determine if the Administrative Fee for the current year should be reduced. 
  

 16 

 3.4 Charges for Operational Services. In consideration for Management Company’s
performance of the Operational Services, the Partnership Group shall reimburse the Parent Entities separately for: 
 (a)
wages, salaries and related payroll taxes of employees of Management Company who perform Operational Services on behalf of the Partnership Group, in each case as adjusted to properly reflect the time spent by such Management Company employees in the
performance of such Operational Services; and 
 (b) the cost of all employee benefits, such as 401(k), pension, and health
insurance benefits relating to employees of Management Company who perform Operational Services on behalf of the Partnership Group, in each case as adjusted to properly reflect the time spent by such Management Company employees in the performance
of such Operational Services. 
 3.5 Reimbursements and Other Separate Changes. The Partnership shall also reimburse
Parent Entities for the following: 
 (a) insurance premiums (the “Insurance Reimbursement”) incurred with respect
to the Assets contributed pursuant to the Contribution Agreement. Parent may increase the Insurance Reimbursement at any time in accordance with increases in the premiums or fees payable under the applicable insurance policies with respect to the
Assets. If the Partnership or any other Partnership Group Member acquires or constructs additional assets during the Applicable Period, Parent shall propose a revised Insurance Reimbursement covering insurance premiums for such additional assets. If
the General Partner, on behalf of the Partnership Group and with the concurrence of the Conflicts Committee, agrees to such revised Insurance 

  

 17 

 
Reimbursement, Parent shall procure insurance coverage for the additional assets pursuant to the terms set forth herein and reference herein to the
“Assets” shall thereafter include such additional assets for purposes of this Section 3.5; 
 (b) out-of-pocket
costs and expenses incurred by the Parent Entities on behalf of the Partnership Group, including the incremental general and administrative expenses of the Partnership in becoming a public company, the cost of preparing Schedules K-1 for the Limited
Partners and General Partner, the cost of external and internal audits, transfer agent and registrar fees, legal fees, printing costs, the cost of preparing reports to the owners of Units and other similar costs and expenses; 
 (c) costs and expenses incurred by the Parent Entities for services that are performed by third Persons on behalf of the Partnership Group
unless such services were at any time performed by the Parent Entities in connection with the management and operation of the Assets and were performed by third Persons for the first time during the one-year period prior to the date of this
Agreement; and 
 (d) all sales, use, excise, value added or similar taxes, if any, that may be applicable from time to time
in respect of the G&A Services and Operational Services. 
 3.6 Invoices. Within thirty (30) days of the date
that the Parent Entities furnishes the Partnership with an invoice or report specifying the reimbursable costs incurred by the Parent Entities under Sections 3.4 and 3.5, the Partnership shall pay the Parent Entities the amounts specified in such
invoice. The Parent Entities shall keep accurate and complete records of the reimbursable costs incurred pursuant to Sections 3.4 and 3.5. The Partnership shall have the right to review the books and records of the Parent Entities with respect to
all costs and expenses 

  

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payable by the Partnership to the Parent Entities pursuant to Sections 3.4 or 3.5, and the Parent Entities shall provide the Partnership with access to its
relevant books and records at reasonable times following reasonable notice and shall enable the Partnership to make copies of all relevant documents. 
 3.7 Automatic Renewal. The Applicable Period shall automatically renew for subsequent two-year periods, cancelable on one year’s notice by either Parent or the Partnership. Following the
expiration of the Applicable Period, the General Partner will determine the amount of staff and support expenses and insurance premium expenses that are properly allocable to the Partnership Group in accordance with the terms of the Partnership
Agreement. 
 3.8 Compensation of Employees. The Management Company employees provided as part of the Operational
Services to the Partnership during the Applicable Period will remain employees of the Management Company. They will continue to be compensated under the various employee compensation and benefit plans of the Management Company. In addition, they may
be eligible to receive benefits and awards under compensation plans established by the Partnership Group. At all times during the Applicable Period, Parent will ensure that the Management Company employees are covered by worker’s compensation
insurance, with policy limits equal to or greater than the limits that are specified in the Throughput Agreement. 
 ARTICLE IV

 TRADEMARK LICENSE 
 4.1 Grant of License. Upon the terms and conditions set forth in this Article IV, Parent hereby grants and conveys to the Partnership Group, the non-exclusive, worldwide right and license (“License”) to use
the name “SemGroup” (hereafter, the “Name”) and the “Triple S 

  

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Shield” logo as shown on Exhibit A (hereafter, the “Mark”) on or in connection with the goods and services offered for sale by the Partnership
Group; provided, however, that the Partnership Group shall not have the right to license the Name and the Mark to any third Persons, but shall have the right to use the Name and the Mark solely in conjunction with goods and services
provided by Partnership and the Partnership Group. 
 4.2 Use of
Mark. The Partnership Group agrees to use the Mark only in compliance with the standards, specifications, directions, information and know-how supplied by Parent, including without limitation the SemGroup, L.P. Logo Identity Standards and
Usage Guidelines, as may be modified by Parent from time to time. The Partnership Group agrees to comply with any requirements established by Parent concerning the style, design, display and use of the Mark, to correctly use the trademark symbol
TM, the service mark symbol SM or registration symbol ® with every use of the Mark, to use the registration symbol ® upon receiving notice of registration of the Mark from Parent and to
submit in advance of its use all advertising copy, brochures or other materials incorporating the Mark to Parent for approval. 
 4.3
Royalties. The Partnership Group shall pay no royalties under this License. 
 4.4 Duration;
Termination. 
 (a) This License shall remain in full force and effect until it is terminated. At such time as
General Partner is no longer an Affiliate of Parent or there is a Change of Control of the Partnership, the license granted hereunder shall immediately terminate without further action of either party. 
  

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 (b) If the Partnership Group makes an assignment for the benefit of its creditors or if
the Partnership Group discontinues its business, the License hereby granted shall automatically terminate forthwith without any notice whatsoever being necessary. In the event this License is so terminated, the Partnership Group, its
representatives, trustees, agents, administrator, successors and/or assigns shall immediately cease all further use of the Name and the Mark, including any use in connection with any goods or services or any advertising, promotional or other
materials pertaining thereto, except with and under the special consent and instructions of Parent in writing, which instructions it shall be obligated to follow. 
 4.5 Right To Inspect; Quality Control. The Partnership Group agrees to submit to Parent from time to time and to permit Parent or its duly authorized representative the right to inspect the
Partnership Group’s use of the Name and the Mark. When requested by Parent, the Partnership Group agrees to send samples of advertising and promotional materials utilizing the Name or the Mark and any other documents which may permit Parent to
determine whether its uses meet the standards, specifications and directions approved by Parent. Parent shall have the right, at all reasonable times, to monitor the Partnership Group’s use of the Name and the Mark, including its use in
connection with the goods and services of the Partnership Group identified by the Name and the Mark to determine that they are of the proper quality. 
 4.6 Ownership. The Partnership Group agrees that ownership of the Name and the Mark and the goodwill relating thereto shall remain vested in Parent both during the term of this License and
thereafter, and the Partnership Group further agrees never to challenge, contest or question the validity of Parent’s ownership of the Name and the Mark or any registrations thereof by Parent. In connection with the use of the Name and the
Mark, the Partnership Group shall not in any manner represent that it has any ownership in the Name and the Mark or 

  

 21 

 
registration thereof except as set forth herein, and the Partnership Group acknowledges that the use of the Name and the Mark shall not create in the
Partnership Group’s favor any right, title or interest in or to the Name and the Mark, but all uses of the Name and the Mark by the Partnership Group shall inure to benefit of Parent. 
 4.7 Policing of Mark. The Partnership Group agrees to inform Parent of the use of any marks similar to the Mark and any potential
infringements or imitations of the Mark which come to its attention. Parent shall have the sole right to determine whether or not any action shall be taken on account of any such infringements or imitations. The Partnership Group shall not institute
any suit or take any action on account of any such infringements or imitations without first obtaining the written consent of Parent to do so. The Partnership Group agrees to assist Parent to the extent necessary in the procurement of any
registration, extension or renewal for, or to protect any of Parent’s rights to the Mark. 
 4.8 Litigation. In the
event any Partnership Group Member is named as defendant in any action based on its use of the Name or the Mark, the Partnership Group agrees to immediately notify Parent, and Parent shall have the right to intervene in any such action and to
control and direct the defense thereof, including the right to select defense counsel; provided that, in the event Parent chooses to exercise control and if the Partnership Group has complied with all of its obligations under this License,
Parent shall reimburse Partnership for the cost of its defense and to indemnify it against all damages arising therefrom. 
 4.9
Indemnification By Partnership. 
 (a) Partnership hereby assumes all responsibility for and agrees
to indemnify Parent against any and all damages, losses, claims, suits or other expenses whatsoever arising out 

  

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of the Partnership Group’s promotion, advertising, use or sale of any services under the Name or the Mark, including Parent’s reasonable
attorneys’ fees incurred in the defense of any action against Parent. 
 (b) As used in this Section 4.9, and for
purposes of determining liability to Parent, Parent shall include all of the Parent Entities and their owners, directors, officers, employees, agents, representatives, successors and assigns of Parent. 
 4.10 Effect of Termination or Expiration. Upon and after the expiration or termination of this License, all rights granted to the
Partnership Group hereunder shall forthwith revert to Parent. The Partnership Group will refrain from further use of the Name and the Mark or any further reference to it, direct or indirect, or use of any mark deemed by Parent to be similar to the
Mark in connection with the Partnership Group’s goods and services. 
 4.11 Parent’s Remedies.

 (a) The Partnership Group acknowledges that its failure to cease the use of the Name and the Mark in connection with
the services at the termination or expiration of this License will result in immediate and irremediable damage to Parent and to the rights of any subsequent licensee of the Name and the Mark. The Partnership Group acknowledges and admits that there
is no adequate remedy at law for such failure to cease manufacture, sale or distribution, and the Partnership Group agrees that in the event of such failure Parent shall be entitled to equitable relief by way of temporary and permanent injunctions
and such other further relief as any court with jurisdiction may deem just and proper. 
  

 23 

 (b) Resort to any remedies referred to herein shall not be construed as a waiver of any
other rights and remedies to which Parent may be entitled under this License or otherwise. 
 4.12 Assignment. The
rights and license granted under this License shall not be assignable in any manner by the Partnership Group without Parent’s prior written consent. The Partnership Group may not sublicense any of the rights granted herein. Parent may assign
this License and/or the Name or the Mark, but shall furnish written notice of such assignment to Partnership. This License will inure to the benefit of the parties and their respective heirs, personal representatives, and permitted successors and
assigns. 
 ARTICLE V 
 MISCELLANEOUS 
 5.1 Choice of Law; Submission to Jurisdiction. This Agreement shall be subject to and
governed by the laws of the State of Oklahoma, excluding any conflicts-of-law rule or principle that might refer the construction or interpretation of this Agreement to the laws of another state. Each Party hereby submits to the jurisdiction of the
state and federal courts in the State of Oklahoma and to venue in such courts located in Tulsa, Oklahoma. 
 5.2 Notice.
All notices or requests or consents provided for by, or permitted to be given pursuant to, this Agreement must be in writing and must be given by depositing same in the United States mail, addressed to the Person to be notified, postpaid, and
registered or certified with return receipt requested or by delivering such notice in person or by telecopier or telegram to such Party. Notice given by personal delivery or mail shall be effective upon actual receipt. Notice given by telegram or
telecopier shall be effective upon actual receipt if received 

  

 24 

 
during the recipient’s normal business hours or at the beginning of the recipient’s next business day after receipt if not received during the
recipient’s normal business hours. All notices to be sent to a Party pursuant to this Agreement shall be sent to or made at the address set forth below such Party’s signature to this Agreement or at such other address as such Party may
stipulate to the other Parties in the manner provided in this Section 4.2. 
 if to the Parent Entities: 
 SemGroup, L.P. 
 Two Warren Place 
 6120 South Yale Avenue, Suite 700 
 Tulsa, Oklahoma 74136-4216 
 Attention: President 
 Fax: (918) 524-8290 
 if to the Partnership Group: 
 SemGroup Partners G.P., L.L.C. 
 Two Warren Place 
 6120 South Yale Avenue, Suite 500 
 Tulsa, Oklahoma 74136-4216 
 Attention: President 
 Fax: (918) 524-8200 
 5.3 Entire Agreement. This Agreement constitutes the entire agreement of the Parties relating to the matters contained herein, superseding all prior contracts or agreements, whether oral or written, relating to the
matters contained herein. 
 5.4 Termination. Notwithstanding any other provision of this Agreement, if the General
Partner is removed as general partner of the Partnership under circumstances where Cause does not exist and Units held by the General Partner and its Affiliates are not voted in favor of such removal or if there is a Change of Control of the
Partnership, this Agreement, other than the provisions set forth in Article II hereof, may immediately thereupon be terminated by Parent. 
  

 25 

 5.5 Amendment or Modification. This Agreement may be amended or modified from time
to time only by the written agreement of all the Parties hereto; provided, however, that the Partnership may not, without the prior approval of the Conflicts Committee, agree to any amendment or modification of this Agreement that the General
Partner determines will adversely affect the holders of Common Units. Each such instrument shall be reduced to writing and shall be designated on its face an “Amendment” or an “Addendum” to this Agreement.

 5.6 Assignment. No Party shall have the right to assign any of its rights or obligations under this Agreement without
the consent of the other Parties hereto. 
 5.7 Counterparts. This Agreement may be executed in any number of
counterparts with the same effect as if all signatory parties had signed the same document. All counterparts shall be construed together and shall constitute one and the same instrument. 
 5.8 Severability. If any provision of this Agreement shall be held invalid or unenforceable by a court or regulatory body of
competent jurisdiction, the remainder of this Agreement shall remain in full force and effect. 
 5.9 Further
Assurances. In connection with this Agreement and all transactions contemplated by this Agreement, each signatory party hereto agrees to execute and deliver such additional documents and instruments and to perform such additional acts as may
be necessary or appropriate to effectuate, carry out and perform all of the terms, provisions and conditions of this Agreement and all such transactions. 
 5.10 Rights of Limited Partners. The provisions of this Agreement are enforceable solely by the Parties to this Agreement, and no Limited Partner of the Partnership shall have the 

  

 26 

 
right, separate and apart from the Partnership, to enforce any provision of this Agreement or to compel any Party to this Agreement to comply with the terms
of this Agreement. 
  

 27 

 IN WITNESS WHEREOF, the Parties have executed this Agreement on, and effective as of the date first
stated above. 
  

			
	SemGroup, L.P.
		
	By	 	SemGroup G.P., L.L.C.,
	Its	 	General Partner
		
	By	 	  
		 	Gregory C. Wallace
		 	Vice President and Secretary
	
	SemManagement, L.L.C.
		
	By	 	SemGroup, L.P.
	Its	 	Sole Member
		
	By	 	SemGroup G.P., L.L.C.,
	Its	 	General Partner
		
	By	 	  
		 	Gregory C. Wallace
		 	Vice President and Secretary
	
	SemGroup Energy Partners, L.P.
		
	By	 	SemGroup Energy Partners G.P., L.L.C.,
	Its	 	General Partner
		
	By	 	  
		 	Kevin L. Foxx
		 	President
	
	SemGroup Energy Partners G.P., L.L.C.
		
	By	 	  
		 	Kevin L. Foxx
		 	President

  

 28

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