SUPPLEMENTAL INDENTURE

Exhibit 4.18

SUPPLEMENTAL INDENTURE

     SUPPLEMENTAL INDENTURE (this “Supplemental Indenture”), dated as of June 30, 2006, among Sun Country Materials, LLC, a Delaware limited liability company (the “Guaranteeing Subsidiary”), a subsidiary of Waste Services, Inc. (or its permitted successor), a Delaware corporation (the “Company”), the Company, the other Guarantors (as defined in the Indenture referred to herein) party to the Indenture on the date hereof and Xxxxx Fargo Bank, National Association, as trustee under the Indenture referred to below (the “Trustee”).

W I T N E S S E T H

     WHEREAS, the Company has heretofore executed and delivered to the Trustee an indenture (the “Indenture”), dated as of April 30, 2004, providing for the issuance of 9 ½ % Senior Subordinated Notes due 2014 (the “Notes”);

     WHEREAS, the Indenture provides that under certain circumstances the Guaranteeing Subsidiary shall execute and deliver to the Trustee a supplemental indenture pursuant to which the Guaranteeing Subsidiary shall unconditionally guarantee all of the Company’s Obligations under the Notes and the Indenture on the terms and conditions set forth herein (the “Note Guarantee”); and

     WHEREAS, pursuant to Section 9.01 of the Indenture, the Trustee is authorized to execute and deliver this Supplemental Indenture;

     NOW, THEREFORE, in consideration of the foregoing and for other good and valuable consideration, the receipt of which is hereby acknowledged, the Guaranteeing Subsidiary and the Trustee mutually covenant and agree for the equal and ratable benefit of the Holders of the Notes as follows:

     1. Capitalized Terms. Capitalized terms used herein without definition shall have the meanings assigned to them in the Indenture.

     2. Agreement To Guarantee. The Guaranteeing Subsidiary hereby agrees to provide an unconditional Guarantee on the terms and subject to the conditions set forth in the Note Guarantee and in the Indenture including but not limited to Article 11 thereof.

     3. No Recourse Against Others. No past, present or future director, officer, employee, incorporator, stockholder or agent of the Guaranteeing Subsidiary, as such, shall have any liability for any obligations of the Company or any Guarantor (including the Guaranteeing Subsidiary) under the Notes, any Note Guarantees, the Indenture or this Supplemental Indenture, as applicable, or for any claim based on, in respect of, or by reason of, such obligations or their creation. Each Holder of the Notes by accepting a Note waives and releases all such liability. This waiver and release are part of the consideration for issuance of the Notes. Such waiver may not be effective to waive liabilities under the federal securities laws and it is the view of the SEC that such a waiver is against public policy.

     4. NEW YORK LAW TO GOVERN. THIS SUPPLEMENTAL INDENTURE SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAW OF THE STATE OF NEW YORK.

     5. Counterparts. The parties may sign any number of copies of this Supplemental Indenture. Each signed copy shall be an original, but all of them together represent the same agreement.

     6. Effect of Headings. The Section headings herein are for convenience only and shall not affect the construction hereof.

     7. The Trustee. The Trustee shall not be responsible in any manner whatsoever for or in respect of the validity or sufficiency of this Supplemental Indenture or for or in respect of the recitals contained herein, all of which recitals are made solely by the Guaranteeing Subsidiary and the Company.

     IN WITNESS WHEREOF, the parties hereto have caused this Supplemental Indenture to be duly executed and attested, all as of the date first above written.

	SUN COUNTRY MATERIALS, LLC
	By:	/s/ Xxxx X. Xxxxxx
		Xxxx X. Xxxxxx
		Vice President and Secretary
	WASTE SERVICES, INC.
	By:	/s/ Xxxx X. Xxxxxx
		Xxxx X. Xxxxxx
		Executive Vice President, General Counsel and Secretary
	WASTE SERVICES OF FLORIDA, INC.
	By:	/s/ Xxxx X. Xxxxxx
		Xxxx X. Xxxxxx
		Vice President and Secretary
	LIBERTY WASTE, LLC
	By:	/s/ Xxxx X. Xxxxxx
		Xxxx X. Xxxxxx
		Vice President and Secretary

Page 2 of 5

	XXXX RECYCLING, INC.
	By:	/s/ Xxxx X. Xxxxxx
		Xxxx X. Xxxxxx
		Vice President and Secretary

	XXXXXXX RECYCLING AND TRANSFER, INC.
	By:	/s/ Xxxx X. Xxxxxx
		Xxxx X. Xxxxxx
		Vice President and Secretary

	JACKSONVILLE FLORIDA LANDFILL, INC.
	By:	/s/ Xxxx X. Xxxxxx
		Xxxx X. Xxxxxx
		Vice President and Secretary

	XXXXX ROAD LANDFILL AND RECYCLING, LTD. by its General Partner, JACKSONVILLE FLORIDA LANDFILL, INC.
	By:	/s/ Xxxx X. Xxxxxx
		Xxxx X. Xxxxxx
		Vice President and Secretary

	OMNI WASTE OF OSCEOLA COUNTY LLC
	By:	/s/ Xxxx X. Xxxxxx
		Xxxx X. Xxxxxx
		Manager

Page 3 of 5

	CACTUS WASTE SYSTEMS, LLC
	By:	/s/ Xxxx X. Xxxxxx
		Xxxx X. Xxxxxx
		Manager

	WASTE SERVICES OF ARIZONA, INC.
	By:	/s/ Xxxx X. Xxxxxx
		Xxxx X. Xxxxxx
		Vice President and Secretary

	WASTE SERVICES LIMITED PARTNER, LLC
	By:	/s/ Xxxx X. Xxxxxx
		Xxxx X. Xxxxxx
		Manager

	WS GENERAL PARTNER, LLC by its Sole Member, WASTE SERVICES, INC.
	By:	/s/ Xxxx X. Xxxxxx
		Xxxx X. Xxxxxx
		Executive Vice President, General Counsel and Secretary

	XXXXXXX HILLS TRANSFER STATION LP
	By:	/s/ Xxxx X. Xxxxxx
		Xxxx X. Xxxxxx
		Vice President and Secretary

Page 4 of 5

	FORT BEND REGIONAL LANDFILL LP
	By:	/s/ Xxxx X. Xxxxxx
		Xxxx X. Xxxxxx
		Vice President and Secretary

	WSI WASTE SERVICES OF TEXAS, LP
	By:	/s/ Xxxx X. Xxxxxx
		Xxxx X. Xxxxxx
		Vice President and Secretary

	WASTE SERVICES OF ALABAMA, INC.
	By:	/s/ Xxxx X. Xxxxxx
		Xxxx X. Xxxxxx
		Vice President and Secretary

	XXXXX FARGO BANK, NATIONAL ASSOCIATION, as Trustee
	By:	/s/
		Name:
		Title:

Page 5 of 5