March 28, 2006

Cyrus R. Lesser, Chief Mosquito Control Section Office of Plant Industries and Pest Management Maryland Department of Agriculture 50 Harry S. Truman Parkway Annapolis, Maryland 21401

Dear Mr. Lesser:

The Maryland Department of the Environment, having reviewed the information in your applications and having considered comments by Maryland Department of Natural Resources (DNR), Environmental Review Unit, partially approves your request to use the toxic materials specified below for mosquito control in State waters throughout Maryland. Toxic Materials Permit TMP-06-197 is issued subject to the conditions below. These conditions incorporate all of the recommendations of the Environmental Review Unit in their March 27, 2006 letter to the Department. Additionally, these recommendations include the attached table, in which DNR has identified areas where application of these requested toxic materials shall be restricted or prohibited.

The Department reserves the right to withdraw or qualify approval for specific sites upon receipt of new information from the Department of Natural Resources. Unless otherwise noted for specific sites, this permit is effective through the end of 2010. During the course of this permit, you may substitute other individuals to supervise application of the materials, provided that they are licensed applicators.

SPECIAL CONDITIONS

ALLEGANY COUNTY

1. Approval is for the use of methoprene, Bacillus Thuringiensis

israelensis ( B.t.i. ), and Bacillus sphaericus ( B.s. ) on a total of 132 acres of marshes, woodland pools, ditches, and other standing water (as shown on maps submitted as part of the application) in Cumberland, Mexico Farms, and Potomac Park.

2. The methoprene, B.t.i. , and B.s. will be used solely in the

aforementioned waters and in strict adherence to the recommendations of the manufacturer. The application will be by spraying and broadcasting.

3. The application of the methoprene, B.t.i. , and B.s. will be supervised by Michael A. Cantwell, Entomologist, Maryland Department of Agriculture.

4. This permit is valid for up to five full applications between March 1

and October 15.

5. There shall be no direct application of methoprene to Use III waters, headwater tributaries, or contiguous wetlands. Between March 1 and June 15, there shall be no direct application of methoprene to documented anadromous finfish spawning areas or their contiguous wetlands.Cyrus R. Lesser, Chief Page 2

ANNE ARUNDEL COUNTY

1. Approval is for the use of methoprene, B.t.i. , and B.s. for mosquito control on a total of 3,198 acres of woodland pools, roadside ditches, other standing water, and wetlands (as shown on maps submitted as part of the application) in Anne Arundel County.

2. The methoprene, B.t.i. , and B.s. will be used solely in the

aforementioned waters and in strict adherence to the recommendations of the manufacturer. The application will be by spraying and broadcasting.

3. The application of the methoprene, B.t.i. , and B.s. will be supervised by Michael Cantwell, Entomologist, Maryland Department of Agriculture.

4. This permit is valid for up to five full applications of methoprene,

B.t.i. , and B.s. between March 1 and October 15.

5. There shall be no direct application of methoprene to Use III waters, headwater tributaries, or contiguous wetlands. Between April 1 and June 15, there shall be no direct application of methoprene to documented anadromous finfish spawning areas or their contiguous wetlands.

6. Use of residual formulations of methoprene is prohibited in

estuarine wetland areas.

BALTIMORE COUNTY

1. Approval is for the use of methoprene B.t.i. , and B.s. for mosquito control on a total of 1,314 acres of woodland pools, ditches, storm water management ponds, other standing water, and wetlands (as shown on maps submitted as part of the application) in Baltimore County.

2. The methoprene, B.t.i. , and B.s. will be used solely in the

aforementioned waters and in strict adherence to the recommendations of the manufacturer. The application will be by spraying and broadcasting. 3. The application of the methoprene, B.t.i. , and B.s. will be supervised by Michael A. Cantwell, Entomologist, Maryland Department of Agriculture.

4. This permit is valid for up to five full applications of methoprene,

B.t.i. , and B.s. between March 1 and October 15.

5. There shall be no direct application of methoprene to Use III waters, headwater tributaries, or contiguous wetlands. Between March 1 and June 15, there shall be no direct application of these materials to documented anadromous finfish spawning areas or their contiguous

wetlands.

6. Use of residual formulations of methoprene is prohibited in

estuarine wetland areas.

CALVERT COUNTY

1. Approval is for the use of methoprene, B.t.i. , and B.s. for mosquito control on a total of 2,995 acres of woodland pools, ditches, storm water management ponds, other standing water, and wetlands (as shown on maps submitted as part of application) in Calvert County.

2. The methoprene, B.t.i. , and B.s. will be used solely in the

aforementioned waters and in strict adherence to the recommendations ofCyrus R. Lesser, Chief Page 3

the manufacturer. The application will be by spraying and broadcasting.

3. The application of the methoprene, B.t.i. , and B.s. will be supervised by William Clay, Supervisor, Calvert County Mosquito Control.

4. This permit is valid for up to five full applications of methoprene,

B.t.i. , and B.s. between March 1 and October 15.

5. Between March 15 and June 15, there shall be no direct application of methoprene to documented anadromous finfish spawning areas or their contiguous wetlands.

6. Use of residual formulations of methoprene is prohibited in

estuarine wetland areas.

CARROLL COUNTY

1. Approval is for the use of methoprene, B.t.i. , and B.s. for mosquito control on a total of 31 acres of woodland pools, ditches, storm water management basins, wetlands, and other standing water (as shown on maps submitted as part of application) in Carroll County.

2. The methoprene, B.t.i. , and B.s. will be used solely in the

aforementioned waters and in strict adherence to the recommendations of the manufacturer. The application will be by spraying and broadcasting.

3. The application of methoprene, B.t.i. , and B.s. will be supervised by Michael A. Cantwell, Entomologist, Maryland Department of Agriculture.

4. This permit is valid for up to five full applications between March 1

and October 15.

5. There shall be no direct application of the methoprene to Use III waters, headwater tributaries, or contiguous wetlands. Between April 1 and June 15, there shall be no direct application of these materials to documented anadromous finfish spawning areas or their contiguous wetlands.

CECIL COUNTY

1. Approval is for the use of methoprene, B.t.i. , and B.s. for mosquito control on a total of 840 acres of woodland pools, ditches, dredge spoil sites, wetlands, and other standing water (as shown on maps submitted as part of application) in Cecil County.

2. The methoprene, B.t.i. , and B.s. will be used solely in the

aforementioned waters and in strict adherence to the recommendations of the manufacturer. The application will be by spraying and broadcasting.

3. The application of the methoprene, B.t.i. , and B.s. will be supervised by Daniel Schamberger, Environmental Specialist, Maryland Department of Agriculture.

4. This permit is valid for up to five full applications of methoprene,

B.t.i. , and B.s. between March 1 and October 15.

5. There shall be no direct application of methoprene to Use III waters, headwater tributaries, or contiguous wetlands. Between April 1 and June 15, there shall be no direct application of methoprene to documented anadromous finfish spawning areas or their contiguous wetlands.Cyrus R. Lesser, Chief Page 4

6. Use of residual formulations of methoprene is prohibited in

estuarine wetland areas.

CHARLES COUNTY

1. Approval is for the use of methoprene, B.t.i. , and B.s. for mosquito control on a total of 1,856 acres of woodland pools, roadside ditches, wetlands, and other standing water (as shown on maps submitted as part of application) in Charles County.

2. The methoprene, B.t.i. , and B.s. will be used solely in the

aforementioned waters and in strict adherence to the recommendations of the manufacturer. The application will be by spraying and broadcasting. 3. The application of the methoprene, B.t.i. , and B.s. will be supervised by Michael Cantwell, Entomologist, Maryland Department of Agriculture.

4. This permit is valid for up to five full applications of methoprene,

B.t.i. , and B.s. between March 1 and October 15.

5. Between March 15 and June 15, there shall be no direct application of methoprene to documented anadromous finfish spawning areas or their contiguous wetlands.

6. Use of residual formulations of methoprene is prohibited in

estuarine wetland areas.

DORCHESTER COUNTY

1. Approval is for the use of methoprene, B.t.i. , and B.s. for mosquito control on a total of 36,155 acres of woodland pools, roadside ditches, wetlands, and other standing water (as shown on maps submitted as part of application) in Dorchester County.

2. The methoprene, B.t.i. , and B.s. will be used solely in the

aforementioned waters and in strict adherence to the recommendations of the manufacturer. The application will be by spraying and broadcasting.

3. The application of the methoprene, B.t.i. , and B.s. will be supervised by David Schofield, Assistant Chief, Maryland Department of Agriculture.

4. This permit is valid for up to five full applications of methoprene,

B.t.i. , and B.s. between March 1 and October 15.

5. Between March 1 and June 15, there shall be no direct application of methoprene to documented anadromous finfish spawning areas or their contiguous wetlands.

6. Use of residual formulations of methoprene is prohibited in

estuarine wetland areas.

FREDERICK COUNTY

1. Approval is for the use of methoprene, B.t.i. , and B.s. for mosquito control in up to 254 acres of woodland pools, roadside ditches, wetlands, and other standing water (as shown on maps submitted as part of application) in Frederick County.

2. The methoprene, B.t.i. , and B.s. will be used solely in the aforementioned waters, and in strict adherence to the recommendations ofCyrus R. Lesser, Chief
Page 5

the manufacturer. The application will be by spraying and broadcasting.

3. The application of the methoprene, B.t.i. , and B.s. will be supervised by Michael A. Cantwell, Entomologist, Maryland Department of Agriculture.

4. This permit is valid for up to five full applications of methoprene,

B.t.i. , and B.s. between March 1 and October 15.

5. There shall be no direct application of methoprene to Use III waters, headwater tributaries, or contiguous wetlands. Between March 1 and June 15, there shall be no direct application of methoprene to documented anadromous finfish spawning areas or their contiguous wetlands.

HARFORD COUNTY

1. Approval is for the use of methoprene, B.t.i. , and B.s. for mosquito control in up to 269 acres of woodland pools, roadside ditches, wetlands, and other standing water (as shown on maps submitted as part of application) in Harford County.

2. The methoprene, B.t.i. , and B.s. will be used solely in the

aforementioned waters and in strict adherence to the recommendations of the manufacturer. The application will be by spraying and broadcasting.

3. The application of the methoprene, B.t.i. , and B.s. will be supervised by Michael A. Cantwell, Entomologist, Maryland Department of Agriculture.

4. This permit is valid for up to five full applications of methoprene,

B.t.i. , and B.s. between March 1 and October 15.

5. There shall be no direct application of methoprene to Use III waters, headwater tributaries, or contiguous wetlands. Between April 1 and June 15, there shall be no direct application of or methoprene to documented anadromous finfish spawning areas or their contiguous wetlands.

6. Use of residual formulations of methoprene is prohibited in

estuarine wetland areas.

HOWARD COUNTY

1. Approval is for the use of methoprene, B.t.i. , and B.s. for mosquito control on a total of 285 acres of woodland pools, roadside ditches, other standing water, and wetlands (as shown on maps submitted as part of application) in Howard County.

2. The methoprene, B.t.i. , and B.s. will be used solely in the

aforementioned waters and in strict adherence to the recommendations of the manufacturer. The application will be by spraying and broadcasting.

3. The application of the methoprene, B.t.i. , and B.s. will be supervised by Jeannine M. Dorothy, Entomologist, Maryland Department of Agriculture.

4. This permit is valid for up to five full applications of methoprene,

B.t.i. , and B.s. between March 1 and October 15.Cyrus R. Lesser, Chief Page 6

5. Between March 15 and June 15, there shall be no direct application of methoprene to documented anadromous finfish spawning areas or their contiguous wetlands.

KENT COUNTY

1. Approval is for the use of methoprene, B.t.i. , and B.s. for mosquito control on a total of 1,184 acres of woodland pools, roadside ditches, other standing water, and wetlands (as shown on maps submitted as part of application) in Kent County.

2. The methoprene, B.t.i. , and B.s. will be used solely in the aforementioned waters, and in strict adherence to the recommendations of the manufacturer. The application will be by spraying and broadcasting.

3. The application of the methoprene, B.t.i. , and B.s. will be supervised by David A. Schofield, Assistant Chief, Maryland Department of Agriculture.

4. This permit is valid for up to five full applications of methoprene,

B.t.i. , and B.s. between March 1 and October 15.

5. Between March 15 and June 15, there shall be no direct application of methoprene to documented anadromous finfish spawning areas or their contiguous wetlands.

6. Use of residual formulations of methoprene is prohibited in

estuarine wetland areas.

MONTGOMERY COUNTY

1. Approval is for the use of methoprene, B.t.i. , and B.s. for mosquito control on a total of 66 acres of woodland pools, roadside ditches, other standing water, and wetlands (as shown on maps submitted as part of application) in Montgomery County.

2. The methoprene, B.t.i. , and B.s. will be used solely in the

aforementioned waters and in strict adherence to the recommendations of the manufacturer. The application will be by spraying and broadcasting.

3. The application of the methoprene, B.t.i. , and B.s. will be supervised by Jeannine M. Dorothy, Entomologist, Maryland Department of Agriculture.

4. This permit is valid for up to five full applications of methoprene,

B.t.i. , and B.s. between March 1 and October 15.

5. There shall be no direct application of methoprene to Use III waters, headwater tributaries, or contiguous wetlands. Between March 1 and June 15, there shall be no direct application of methoprene to documented anadromous finfish spawning areas or their contiguous wetlands.

PRINCE GEORGE'S COUNTY

1. Approval is for the use of methoprene, B.t.i. , and B.s. for mosquito control on a total of 3,941 acres of woodland pools, roadside ditches, other standing water, and wetlands (as shown on maps submitted as part of application) in Prince George's County.

2. The methoprene, B.t.i. , and B.s. will be used solely in theCyrus R. Lesser, Chief
Page 7

aforementioned waters and in strict adherence to the recommendations of the manufacturer. The application will be by spraying and broadcasting.

3. The application of the methoprene, B.t.i. , and B.s. will be supervised by Jeannine M. Dorothy, Entomologist, Maryland Department of Agriculture.

4. This permit is valid for up to five applications of methoprene, B.t.i.

, and B.s. between March 1 and October 15.

5. There shall be no direct application of methoprene to Use III waters, headwater tributaries, or contiguous wetlands. Between March 15 and June 15, there shall be no direct application of methoprene to documented anadromous finfish spawning areas or their contiguous wetlands.

6. Use of residual formulations of methoprene is prohibited in

estuarine wetland areas.

QUEEN ANNE'S COUNTY

1. Approval is for the use of methoprene, B.t.i. , and B.s. for mosquito control on a total of 423 acres of woodland pools, roadside ditches, other standing water, and wetlands (as shown on maps submitted as part of application) in Queen Anne's County.

2. The methoprene, B.t.i. , and B.s. will be used solely in the

aforementioned waters and in strict adherence to the recommendations of the manufacturer. The application will be by spraying and broadcasting.

3. The application of the methoprene, B.t.i. , and B.s. will be supervised by Daniel Schamberger, Environmental Specialist, Maryland Department of Agriculture.

4. This permit is valid for up to five full applications of methoprene,

B.t.i. , and B.s. between March 1 and October 15.

5. Between April 1 and June 15, there shall be no direct application of methoprene to documented anadromous finfish spawning areas or their contiguous wetlands.

6. Use of residual formulations of methoprene is prohibited in

estuarine wetland areas.

ST. MARY'S COUNTY

1. Approval is for the use of methoprene, B.t.i. , and B.s. for mosquito control on a total of 1,336 acres of woodland pools, roadside ditches, other standing water, and wetlands (as shown on maps submitted as part of application) in St. Mary's County.

2. The methoprene, B.t.i. , and B.s. will be used solely in the

aforementioned waters and in strict adherence to the recommendations of the manufacturer. The application will be by spraying and broadcasting.

3. The application of the methoprene, B.t.i. , and B.s. will be supervised by Michael Cantwell, Entomologist, Maryland Department of Agriculture.

4. This permit is valid for up to five full applications of methoprene,

B.t.i. , and B.s. between March 1 and October 15.Cyrus R. Lesser, Chief Page 8

5. Between March 15 and June 15, there shall be no direct application of methoprene to documented anadromous finfish spawning areas or their contiguous wetlands.

6. Use of residual formulations of methoprene is prohibited in

estuarine wetland areas.

SOMERSET COUNTY

1. Approval is for the use of methoprene, B.t.i. , and B.s. for mosquito control on a total of 12,124 acres of woodland pools, roadside ditches, other standing water, and wetlands (as shown on maps submitted as part of application) in Somerset County.

2. The methoprene, B.t.i. , and B.s. will be used solely in the

aforementioned waters and in strict adherence to the recommendations of the manufacturer. The application will be by spraying and broadcasting.

3. The application of the methoprene, B.t.i. , and B.s. will be supervised by Larry Beauchamp, Supervising Inspector, Mosquito Control, Maryland Department of Agriculture.

4. This permit is valid for up to five full applications of methoprene,

B.t.i. , and B.s. between March 1 and October 15.

5. Between March 1 and June 15, there shall be no direct application of methoprene to documented anadromous finfish spawning areas or their contiguous wetlands.

6. Use of residual formulations of methoprene is prohibited in

estuarine wetland areas.

TALBOT COUNTY

1. Approval is for the use of methoprene, B.t.i. , and B.s. for mosquito control on a total of 4,620 acres of woodland pools, roadside ditches, other standing water, and wetlands (as shown on map submitted as part of application) in Talbot County.

2. The methoprene, B.t.i. , and B.s. will be used solely in the

aforementioned waters and in strict adherence to the recommendations of the manufacturer. The application will be by spraying and broadcasting.

3. The application of the methoprene, B.t.i. , and B.s. will be supervised by Lawrence A. Lembeck, Entomologist, Maryland Department of Agriculture.

4. This permit is valid for up to five full applications of methoprene,

B.t.i. , and B.s. between March 1 and October 15.

5. Between March 1 and June 15, there shall be no direct application of methoprene to documented anadromous finfish spawning areas or their contiguous wetlands.

6. Use of residual formulations of methoprene is prohibited in

estuarine wetland areas.

WASHINGTON COUNTY

1. Approval is for the use of methoprene, B.t.i. , and B.s. for mosquitoCyrus R. Lesser, Chief Page 9

control on a total of 39 acres of woodland pools, roadside ditches, other standing water, and wetlands (as shown on map submitted as part of application) in Washington County.

2. The methoprene, B.t.i. , and B.s. will be used solely in the

aforementioned waters and in strict adherence to the recommendations of the manufacturer. The application will be by spraying and broadcasting.

3. The application of the methoprene, B.t.i. , and B.s. will be supervised by Michael A. Cantwell, Entomologist, Maryland Department of Agriculture.

4. This permit is valid for up to five full applications of methoprene,

B.t.i. , and B.s. between March 1 and October 15.

5. There shall be no direct application of methoprene to Use III waters, headwater tributaries, or contiguous wetlands. Between March 1 and June 15, there shall be no direct application of methoprene to documented anadromous finfish spawning areas or their contiguous wetlands.

WICOMICO COUNTY

1. Approval is for the use of methoprene, B.t.i. , and B.s. for mosquito control on a total of 633 acres of woodland pools, roadside ditches, other standing water, and wetlands (as shown on maps submitted as part of application) in Wicomico County.

2. The methoprene, B.t.i. , and B.s. will be used solely in the

aforementioned waters and in strict adherence to the recommendations of the manufacturer. The application will be by spraying and broadcasting.

3. The application of the methoprene, B.t.i. , and B.s. will be supervised by Lawrence A. Lembeck, Entomologist, Maryland Department of Agriculture.

4. This permit is valid for up to five full applications of methoprene, B.t.i. , and B.s. between March 1 and October 15.

5. Between March 1 and June 15, there shall be no direct application of methoprene to documented anadromous finfish spawning areas or their contiguous wetlands.

6. Use of residual formulations of methoprene is prohibited in

estuarine wetland areas.

WORCESTER COUNTY

1. Approval is for the use of methoprene, B.t.i. , and B.s. for mosquito control on a total of 6,959 acres of woodland pools, roadside ditches, other standing water, and wetlands (as shown on maps submitted as part of application) in Worcester County.

2. The methoprene, B.t.i. , and B.s. will be used solely in the

aforementioned waters and in strict adherence to the recommendations of the manufacturer. The application will be by spraying and broadcasting.

3. The application of the methoprene, B.t.i. , and B.s. will be supervised by Phil Brittingham, Supervising Inspector, Mosquito Control, MarylandCyrus R. Lesser, Chief Page 10

Department of Agriculture.

4. This permit is valid for up to five full applications of methoprene,

B.t.i. , and B.s. March 1 and October 15.

5. Between March 1 and June 15, there shall be no direct application of methoprene to documented anadromous finfish spawning areas or their contiguous wetlands.

**6.** Use of residual formulations of methoprene is restricted to storm water detention facilities and isolated woodland pools, neither of which is within or immediately next to estuarine aquatic habitat areas.

7. Use of residual formulations of methoprene is prohibited in estuarine

wetland areas.

GENERAL CONDITIONS

1. The use of methoprene briquets is prohibited in estuarine marsh areas.

2. There shall be no applications of pesticides to natural waterways. This prohibition includes altered natural channels such as functioning public drainage association ditches. This prohibition does not apply to artificial conveyances such as roadside ditches and head-drainage storm water management impoundments.

If you have any questions, please call me at (410) 537-3323.

Sincerely,

Edward Gertler Industrial Discharge Permits Division Water Management Administration

Attachment

cc: Ray Dintaman

Dennis Howard