PERMIT NO: WAG-994000

Issuance Date: March 1, 2006

Effective Date: April 1, 2006

Expiration Date: April 1, 2011

AQUATIC PLANT AND ALGAE MANAGEMENT GENERAL PERMIT

National Pollutant Discharge Elimination System (NPDES) and 

State Waste Discharge General Permit

State of Washington

Department of Ecology

Olympia, Washington 98504-7600

In compliance with the provisions of

the State of Washington Water Pollution Control Law

Chapter 90.48 Revised Code of Washington as amended

And

The Federal Water Pollution Control Act as amended

(Clean Water Act)

Title 33 United States Code, Section 1251 et seq.

Until this permit expires, is modified or revoked, Permittees that have properly obtained 

coverage by this permit are authorized to discharge to waters of the state in accordance with the 

special and general conditions that follow.

________________________

David C. Peeler, Manager

Water Quality Program

Department of Ecology
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TABLE OF CONTENTS

SUMMARY OF PERMIT REPORT SUBMITTALS ......................................................... 6

SPECIAL CONDITIONS ................................................................................................. 7

S1. PERMIT COVERAGE.................................................................................................................................7

A. Activities Covered Under This Permit ............................................................................................................7

B. Activities Excluded From Coverage Under This Permit...............................................................................11

C. Geographic Area Covered .............................................................................................................................11

D. Additional Requirements for Discharges to Water Bodies Where Sensitive, Threatened, or Endangered 

Plants Are Present...................................................................................................................................................11

S2. PERMIT APPLICATION REQUIREMENTS ........................................................................................12

A. Who Applies for Coverage (Who is the Permittee).......................................................................................12

B. How to Apply for Coverage ..........................................................................................................................13

C. Public Notice Requirements..........................................................................................................................13

D. Permit Coverage Timeline.............................................................................................................................13

E. Denial and/or Revocation of Coverage .........................................................................................................14

F. Length of Coverage .......................................................................................................................................15

S3. COMPLIANCE WITH STANDARDS......................................................................................................15

A. Standards.......................................................................................................................................................15

B. Impaired Water Bodies..................................................................................................................................15

S4. WETLANDS-CONTROL PROJECTS.....................................................................................................16

S5. RESTRICTIONS ON THE APPLICATION OF PRODUCTS ..............................................................16

A. Short-Term Modification of Water Quality Standards..................................................................................16

B. Authorized Discharges..................................................................................................................................16

C. Prohibited Discharges....................................................................................................................................17

D. Products Allowed for Use Under This Permit...............................................................................................17

E. Experimental Use Permits.............................................................................................................................19

F. Specific Restrictions on the Application of Products....................................................................................19

S6. NOTIFICATION AND POSTING REQUIREMENTS...........................................................................25

A. Ecology Notification Requirements ..............................................................................................................25

B. Residential and Business Notification...........................................................................................................26

C. Camp Notification Requirements..................................................................................................................27

D. Posting Requirements....................................................................................................................................27

S7. MONITORING REQUIREMENTS..........................................................................................................30

A. Application of Herbicides, Algaecides, and Nutrient Inactivation Products.................................................30

B. Application of Phosphorus Inactivation Products .........................................................................................31

S8. SAMPLING AND ANALYTICAL PROCEDURES................................................................................31

S9. REPORTING AND RECORDKEEPING REQUIREMENTS...............................................................32

A. Annual Reporting ..........................................................................................................................................32

B. Records Retention .........................................................................................................................................33

C. Recording of Results.....................................................................................................................................33

D. Additional Monitoring by the Permittee........................................................................................................34
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E. Noncompliance Notification .........................................................................................................................34

S10. SPILL PREVENTION AND CONTROL.................................................................................................34

A. Spill Prevention .............................................................................................................................................34

B. Spill Notification Requirements....................................................................................................................35

C. Spill Cleanup Requirements..........................................................................................................................35

S11. CONDITIONAL APPROVAL FOR THE USE OF PRODUCTS NOT SPECIFIED IN THE 

CURRENT PERMIT ..................................................................................................................................35

A. Product Approval ..........................................................................................................................................35

B. Public Notification Procedures......................................................................................................................36

C. Approval of a New Product...........................................................................................................................37

S12. MITIGATION FOR PROTECTION OF SENSITIVE, THREATENED, OR ENDANGERED 

PLANTS: CONTROL PROJECTS...........................................................................................................37

A. Requirement for a Sensitive, Threatened, or Endangered Plant Survey........................................................37

B. Mitigation Measures......................................................................................................................................37

S13. APPENDICES .............................................................................................................................................39

GENERAL CONDITIONS.......................................................................................................................................40

G1. DISCHARGE VIOLATIONS ....................................................................................................................40

G2. PROPER OPERATION AND MAINTENANCE ....................................................................................40

G3. RIGHT OF ENTRY ....................................................................................................................................40

G4. NOTIFICATION OF CHANGE IN COVERED ACTIVITIES .............................................................40

G5. REVOCATION OF COVERAGE.............................................................................................................40

G6. GENERAL PERMIT MODIFICATION OR REVOCATION...............................................................41

G7. REPORTING A CAUSE FOR REVOCATION OF COVERAGE ........................................................42

G8. TRANSFER OF PERMIT COVERAGE..................................................................................................42

G9. TOXIC POLLUTANTS..............................................................................................................................42

G10. OTHER REQUIREMENTS OF TITLE 40 CODE OF FEDERAL REGULATIONS .........................42

G11. COMPLIANCE WITH OTHER LAWS AND STATUTES....................................................................42

G12. ADDITIONAL MONITORING REQUIREMENTS...............................................................................42

G13. REMOVED SUBSTANCES.......................................................................................................................43

G14. SIGNATORY REQUIREMENTS .............................................................................................................43

G15. REQUESTS TO BE EXCLUDED FROM COVERAGE UNDER A GENERAL Permit....................44

G16. APPEALS.....................................................................................................................................................44

G17. DUTY TO REAPPLY.................................................................................................................................44
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G18. TERMINATION OF INDIVIDUAL PERMITS ......................................................................................45

G19. TERMINATION OF COVERAGE UPON ISSUANCE OF AN INDIVIDUAL PERMIT..................45

G20. ENFORCEMENT .......................................................................................................................................45

G21. SEVERABILITY.........................................................................................................................................45

G22. PAYMENT OF FEES .................................................................................................................................45

APPENDIX A - DEFINITIONS AND ACRONYMS........................................................ 46

APPENDIX B – PUBLIC NOTICE................................................................................. 53

APPENDIX C – GROUND WATER MONITORING PROTOCOL................................. 54

APPENDIX D – ECOLOGY NOTIFICATION TEMPLATE............................................ 55

APPENDIX E – BUSINESS AND RESIDENTIAL NOTICE TEMPLATE...................... 57

APPENDIX F – POSTING TEMPLATES...................................................................... 58
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LIST OF TABLES

Table 1: Listed Adjuvants............................................................................................................ 18

Table 2: Specific Restrictions on the Application of Herbicides and Algaecides for Control and 

Eradication Projects....................................................................................................... 20

Table 3: Specific Restrictions on Application of Products for Inactivation of Phosphorus........ 22

Table 4: Restrictions on Applications of Barley Straw................................................................ 23

Table 5: Restrictions on Applications of Shading Products, Biological Water Clarifiers, etc. ... 24

Table 6: Specific Treatment Restrictions for Aquatic Plant Eradication Projects....................... 24
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SUMMARY OF PERMIT REPORT SUBMITTALS

Refer to the Special and General Conditions of this permit for additional submittal requirements.

Permit 

Section

Submittal Frequency First Submittal Date

S1.D. Plant survey and mitigation measures As necessary

S2. Notification of Application As necessary

S7.A Annual Monitoring Report Annually November 30, 2006

S7. Noncompliance Notification As necessary

G1. Notice of Change in Authorization As necessary

G4. Notification of Change in covered 

activities

As necessary

G5. Engineering Report for Construction or 

Modification Activities

As necessary

G7. Transfer of coverage As necessary

G8. Notice of Permit Transfer As necessary

G21. Notice of Planned Changes As necessary

G22. Reporting Anticipated Non-Compliance As necessary
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SPECIAL CONDITIONS

S1. PERMIT COVERAGE 

This permit revokes and replaces the Aquatic Nuisance Plant and Algae Control general permit 

(WAG-994000) for any aquatic nuisance plant or algae management activities as specified in 

S1.A of this permit. The revocation and replacement is effective beginning on the effective date 

of this permit. This permit also covers the management of any in-lake aquatic noxious or 

quarantine-list weeds previously covered by the Washington State Department of Agriculture

(WSDA). The treatment of emergent noxious or quarantine-list vegetation along lake shorelines 

can occur under this permit or the Aquatic Noxious Weed Control NPDES General Permit. This 

permit does not replace the Aquatic Noxious Weed Control NPDES General Permit (WAG993000) currently issued to WSDA.

A. Activities Covered Under This Permit

This general permit covers aquatic plant and algae management activities that discharge 

chemicals and other aquatic plant and algae control products into surface waters of the state 

of Washington. Products regulated under this permit include herbicides, algaecides, 

adjuvants, marker dyes, barley straw, shading products, biological water clarifiers, and 

nutrient inactivation products. In-lake and roadside/ditch bank emergent vegetation 

management activities are also included where chemicals may enter the water. 

Aquatic plant and algae management activities are organized into three categories: 

Eradication, Control, and Nutrient Inactivation. The permit has different requirements for 

each category.

1. Eradication

Eradication projects in lakes target either established infestations or early infestations.

The goal of eradication is the complete and permanent removal of the targeted species 

from the entire water body. Eradication shall be conducted in a manner that minimizes 

impacts to non-target species to the greatest extent possible. Impact on non-target plants 

is acceptable to the extent needed to control the target plants.

a. An eradication project is allowed only for: 

i. Noxious weeds as identified in Chapter 16-750 of the Washington 

Administrative Code (WAC) ( web site address: 

http://www.nwcb.wa.gov/weed_list/weed_listhome.html);

ii. Plants listed on the Quarantine List as identified in Chapter 16-752 WAC (web 

site address: http://www.nwcb.wa.gov/weed_list/weed_listhome.html); 

 

Words in bold typeface are defined in Appendix A – Definitions and Acronyms.
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iii. Newly discovered non-native and potentially invasive plants not listed on 

the above lists, as determined by the Washington State Noxious Weed 

Control Board, WSDA Plant Protection Program, or the Washington State 

Department of Ecology (Ecology).

b. In-lake eradication projects target either established infestations or early 

infestations of submersed, floating, or floating-leaved species. Established

infestations are defined as a water body infestation of more than 20 percent of the 

littoral zone. Early infestations are defined as infestations of 20 percent or less of the 

littoral zone.

2. Control

This permit regulates two general categories of control projects: aquatic plant control and 

algae control.

a. Aquatic plant control projects

Aquatic plant control means the partial removal of aquatic plants within a water body 

or along a shoreline to allow for the protection of beneficial uses of the water body. 

Impact on non-target plants is acceptable to the minimum extent needed to control 

the target plants.

i. For lakes other than Lake Washington, Lake Sammamish, Lake Union (including 

Portage Bay), submersed or floating aquatic plant control is limited to:

1. 100 percent of plants in high use areas except in identified wetlands (see 

S4);

2. 100 percent of Class A noxious weeds and 100 percent of Class B designate 

noxious weeds in the areas where they are designated for control as identified 

in Chapter 16-750 WAC 

(http://www.leg.wa.gov/WAC/index.cfm?fuseaction=chapterdigest&chapter

=16-750) 

3. 100 percent of any noxious or quarantine-list weed (see S1.A.2.a.i.7 & 8) if 

the weed control is conducted using a selective herbicide.

4. On individual lots, Permittees shall not intentionally apply pesticides to 

more than 10 feet on either side of a dock. For treatment that is not around a 

dock, the Permittee shall limit pesticide application to an area no more than 

20 feet wide. The treatment area shall remain the same for the entire length 

of permit coverage.

5. In all areas other than individual lots, the percentage of littoral zone 

treatment allowed is based on total littoral surface acres of the lake. The 

treatment area shall remain the same for the entire length of permit coverage.
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a. In lakes that are up to 15 acres in size, the Permittee shall limit treatment 

to 75 percent of the littoral zone.

b. In lakes that are between 16 and 50 acres in size, the Permittee shall 

limit treatment to 60 percent of the littoral zone.

c. In lakes that are between 51 and 500 acres in size, the Permittee shall 

limit treatment to 50 percent of the littoral zone.

d. In lakes over 500 acres in size, the Permittee shall limit treatment to 30

percent of the littoral zone.

6. Native and non-native plants (intentionally bolded for definition);

7. Noxious submersed or floating weeds (not targeted for lake wide eradication) 

as identified in Chapter 16-750 WAC

(http://www.leg.wa.gov/WAC/index.cfm?fuseaction=chapterdigest&chapter

=16-750) 

8. Submersed or floating plants on the quarantine list (not targeted for lake wide 

eradication) as identified in Chapter 16-752 WAC

(http://www.nwcb.wa.gov/weed_laws/16-752.pdf)

ii. Floating-leaved and emergent noxious weed and quarantine listed weed control

(includes Lake Washington, Lake Sammamish, and Lake Union/Portage Bay)

The Permittee may control 100 percent of the littoral area on a lot by lot basis for 

floating-leaved and emergent noxious weeds and floating-leaved and emergent 

quarantine weeds as identified in Chapters 16-750 and 16-752 WAC.

iii. Floating-leaved and emergent native plant control (includes Lake Washington, 

Lake Sammamish, and Lake Union/Portage Bay)

The Permittee may control floating-leaved and emergent native plants in 100 

percent of:

1. Defined navigation channels and/or swim channels;

2. All high use areas (boat launches, swimming beaches, etc.)

The Permittee shall limit treatment to no more than 40 percent of the floatingleaved and emergent plants on individual lots.

iv. Roadside and ditch bank plant control

1. For roadside and ditch bank maintenance activities conducted by state and 

local agencies, the Permittee may treat 100 percent of the plants within the 
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right of way to prevent operational and structural impacts to transportation 

facilities or ditch banks.

2. The Permittee may treat no more than of 40 percent of roadsides and ditches 

on privately owned individual lots.

v. Lake Washington/Lake Sammamish/Lake Union (including Portage Bay)

1. The Permittee may treat 100 percent of high use areas

2. On individual lots, Permittees shall not intentionally apply pesticides to more 

than 10 feet on either side of a dock. For treatment that is not around a dock, 

the Permittee shall limit pesticide application to an area no more than 20 feet 

wide. The treatment area shall remain the same for the entire length of permit 

coverage.

3. The Permittee may treat 100 percent of any noxious or quarantine-list weed 

(see S1.A.2.a.i.7 & 8) if the weed control is conducted using a selective

herbicide.

4. The Permittee may treat 100 percent of any Class A noxious weed.

b. Algae control projects

Algae control means the treatment of filamentous algae, cyanobacteria, or algal 

species that have the potential to affect human or environmental health. 

i. Filamentous algae - The Permittee may treat filamentous algae on a lake-wide 

basis so long as the area treated does not exceed the maximum amount of 

littoral zone allowed for treatment in S1.A.2.a.i.

ii. Cyanobacteria (blue green algae) – The Permittee may treat cyanobacteria for 

the protection of human health and beneficial uses. Whole-lake treatments are 

allowed when potentially toxic algae species are identified in the water column.

iii. Phytoplankton - The Permittee shall not treat other phytoplankton under this 

permit, except for algal species that have the potential to adversely affect human 

or environmental health.

c. Nutrient inactivation treatments

The Permittee may use alum (aluminum sulfate or sodium aluminate) and calcium 

hydroxide for the inactivation of phosphorus, either as partial water body or whole 

water body treatment.
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B. Activities Excluded From Coverage Under This Permit

The following water bodies and activities are excluded from coverage under this permit:

1. Man-made detention or retention ponds designed specifically for wastewater or 

stormwater treatment that do not have an outlet to surface waters of the state, or ponds 

that will not discharge to other water bodies during and for two weeks following

treatment. 

2. Constructed detention ponds for wastewater or stormwater treatment or control covered 

by a separate individual or general NPDES or state permit.

3. Upland farm ponds with no discharge to other surface waters of the state during, and for 

two weeks following treatment.

4. Any constructed water body five acres or less in surface area with no discharge to other

surface waters of the state during or for two weeks following treatment. 

5. Aquatic plant management activities conducted on seasonally dry land surfaces 

(including seasonally dry wetlands) as long as the active ingredient is not biologically 

available when the water returns.

6. Any research activities when pesticides or adjuvants are being applied to lakes under a 

state experimental use permit (sites are less than one acre in size).

C. Geographic Area Covered

This general permit applies to the application of herbicides, algaecides, adjuvants, marker 

dyes, barley straw, shading products, biological water clarifiers, and nutrient inactivation 

products for the control of native and non-native aquatic plants and algae, and the eradication 

of non-native floating, submersed, and lake shoreline emergent noxious aquatic plants 

throughout the state of Washington. 

D. Additional Requirements for Discharges to Water Bodies Where Sensitive, Threatened, 

or Endangered Plants Are Present 

1. Ecology will determine whether sensitive, threatened, or endangered plants are present 

in the proposed treatment area by consulting the Department of Natural Resources 

(DNR) Washington State Natural Heritage Data System or by consulting with a 

professional aquatic botanist (that is independent of the planned herbicide treatment).

2. State agency applicants with access to Washington State Natural Heritage data or that 

employ a professional aquatic biologist may elect to provide Ecology with a map and/or 

written determination (based on a plant survey) that indicates whether sensitive, 

threatened, or endangered plants are present in the treatment area.

3. For early and established noxious or quarantine listed weed infestation eradication 

projects:
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a. If Ecology determines that a sensitive, threatened or endangered plant exists in a 

water body, Ecology shall consult with the Washington Natural Heritage Program on 

methods to minimize harm to rare plants. 

b. Ecology may condition the permit coverage based on DNR’s advice to minimize 

harm to the sensitive, threatened, or endangered plant from any herbicide treatment to 

remove noxious weeds. 

4. For aquatic plant and algae control projects:

a. If Ecology determines that sensitive, threatened or endangered plants are present in 

the proposed treatment area, the Permittee shall submit a detailed plant survey. 

b. The Permittee shall contract with a professional aquatic botanist or wetland specialist 

(that is independent of the proposed herbicide treatment) to conduct the plant survey. 

c. If the survey shows that sensitive, threatened or endangered plants are present in the 

proposed treatment area, the Permittee shall choose one or more mitigation measure 

as detailed in Section S12. 

S2. PERMIT APPLICATION REQUIREMENTS

A. Who Applies for Coverage (Who is the Permittee) 

1. The licensed pesticide applicator (WAC 16-228-1545) shall apply for coverage under this 

general permit. The applicator must be licensed in Washington State and have an aquatic 

endorsement (WAC 16-228-1545 3(t)).

2. A sponsor (i.e., government agency, homeowners association, etc.) may obtain joint 

permit coverage with their applicator. Licensed applicators are not required for certain 

types of projects (such as nutrient inactivation). In these instances, the person who most 

closely meets the definition of an applicator may apply for and obtain coverage.

3. A government agency that may be changing pesticide applicators during the life of this 

permit can choose to obtain sole coverage under the general permit. A list of licensed 

pesticide applicators, including their license numbers and expiration dates, must be 

submitted to Ecology prior to each treatment season.

4. Government entities that employ licensed pesticide applicators with aquatic 

endorsements on staff may apply for coverage. A list of licensed pesticide applicators, 

including their license numbers and expiration dates, must be submitted to Ecology prior 

to each treatment season.

5. Camps with swim beaches shall obtain joint coverage with their applicator under this 

permit if they sponsor a treatment to be performed during or within two weeks before the 

start of camp (see Notification Requirements in S6.C).
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6. A sponsor may apply for coverage prior to hiring a licensed applicator, however Ecology 

will not issue coverage until the applicator has signed the application for coverage.

B. How to Apply for Coverage

1. The prospective Permittee shall apply for coverage at least 60 days prior to the planned 

management of aquatic plants or algae, or nutrient inactivation. 

2. Application materials shall include: 

a. An Ecology application form that is accurately completed (Notice of Intent [NOI]), 

and a State Environmental Policy Act (SEPA) checklist for the project. The SEPA 

checklist should be submitted to Ecology, the lead agency for in-lake aquatic plant 

and algae management projects, and Ecology will issue a SEPA determination prior 

to issuing permit coverage. Information about SEPA and the checklist can be found 

at: http://www.ecy.wa.gov/programs/sea/sepa/e-review.html

b. When the applicator is the sole Permittee, the sponsor shall sign and date the 

application for coverage, affirming that they have contracted with the applicator for 

the treatment of the water body.

c. Prior to beginning of the thirty day comment period, a copy of the public notice shall

be submitted to Ecology, and shall include the date of the second publication.

d. Any additional relevant information requested by Ecology. 

C. Public Notice Requirements

Applicants shall publish a public notice of the NPDES discharge permit application for 

coverage once per week for two consecutive weeks, at least seven days apart, in a local 

newspaper of general circulation. The public comment period of 30 days shall commence 

upon the date of the second publication. The applicant shall use the publication notice 

template provided in Appendix B. No modifications of this template are allowed.

D. Permit Coverage Timeline 

1. The timeline for approval/denial of an application for coverage will not begin until a 

complete and accurate application has been received. 

2. The NOI and SEPA checklist shall be submitted on or before the first public notice (See 

Condition S2.C above.). The thirty day public comment period required by WAC 173-

226-130(5) begins on the publication date of the second public notice. Unless notified 

otherwise by Ecology, coverage under the general permit will automatically commence 

on the sixtieth day following receipt by Ecology of a completed NOI.
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3. Ecology will review all public comments prior to making a determination on whether to 

grant permit coverage. This determination will only consider whether the applicant meets 

the requirements for coverage.

4. Ecology will submit the final decision to the applicant in writing. If the application for 

coverage/modification of coverage is approved, coverage will begin on the date of the 

approval letter.

5. Ecology may require additional time to review the application if: 

a. There is a request for a public hearing, or

b. Public comments are filed that indicate the coverage under the permit may not be 

appropriate, or

c. More information is necessary to determine whether coverage under this general 

permit is appropriate, or

d. Mitigation is required to protect sensitive, threatened, or endangered plant species.

6. When additional time is required to review the application, Ecology will notify the 

applicant in writing and identify the issues that must be resolved before a decision can be 

reached.

Permit coverage is subject to a 30-day appeal period. This appeal period begins on the day 

coverage is issued.

E. Denial and/or Revocation of Coverage

1. Ecology may deny permit coverage under the following conditions:

a. Misrepresentation of facts or failure to disclose all relevant facts concerning the 

permit.

b. Inadequate protection of sensitive, threatened, or endangered species.

c. Nonpayment of permit fees pursuant to RCW 90.48.465 and Chapter 173-224 WAC.

d. Nonpayment of final penalties for permit violations under either the previous 

Nuisance Weed or Noxious Weed General NPDES permits, or this new general 

NPDES permit. NOTE: Condition S2.E.1.d. is no longer in effect in response to 

a Superior Court decision. 

e. Proposed treatment of a 303(d)-listed water body if such treatment would result in 

further permanent impairment of the water body and temporary impairment cannot be 

mitigated.
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f. Proposed treatment of a water body that flows into a 303(d)-listed water body if such 

treatment would result in further permanent impairment of the water body and 

temporary impairment cannot be mitigated.

2. Ecology may require any discharger with coverage under this permit or applying for 

coverage under this permit to apply for and obtain coverage under an individual permit or 

another more specific general permit. 

3. Permittees who have their coverage revoked for cause according to WAC 173-226-240 

may request temporary coverage under this permit during the time an individual permit is 

being developed, provided the request is made within ninety (90) days from the time of 

revocation and is submitted along with a complete individual permit application form.

4. If the applicant has an individual permit but applies for coverage under the general 

permit, the individual permit will remain in effect until terminated in writing by Ecology.

F. Length of Coverage

The length of coverage is the period of this general permit, unless otherwise notified by 

Ecology. A Permittee may request termination of permit coverage by submitting a “Notice of 

Termination” form. If coverage is not terminated, the Permittee will continue to incur an 

annual permit fee.

S3. COMPLIANCE WITH STANDARDS

A. Standards

This permit does not authorize a violation of Washington State surface water quality 

standards (Chapter 173-201A Washington Administrative Code (WAC)), ground water 

quality standards (Chapter 173-200 WAC), sediment management standards (Chapter 173-

204 WAC), or human health-based criteria in the National Toxics Rule (Federal Register, 

Vol. 57, NO. 246, Dec. 22, 1992, pages 60848-60923). 

B. Impaired Water Bodies

The Permittee shall not cause further permanent impairment of any 303(d)-listed water body 

for any parameter. Phosphorus and dissolved oxygen are specific parameters of concern. The 

Permittee shall consider and apply at least one of the following mitigation measures to 

prevent further impairment (outside of the confines of the short-term modification of water 

quality standards allowed under this permit):

1. Timing of treatment (early vs. late in the season)

2. Chemical choice (contact vs. systemic herbicides)

3. Limiting the area treated at any one time
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4. Mechanical removal of plants following chemical treatment

5. Aeration

S4. WETLANDS-CONTROL PROJECTS

For swim beach and boat launch control projects in identified and/or emergent wetlands,

treatments shall be minimized to protect the wetlands, but allowed to the extent necessary for 

safe recreation and navigation. For eradication projects, the Permittee shall protect native 

wetland vegetation as much as possible and shall use marker dyes when appropriate.

S5. RESTRICTIONS ON THE APPLICATION OF PRODUCTS

A. Short-Term Modification of Water Quality Standards

1. WAC 173-201A-410 allows short-term modification of the criteria and classifications 

established by this regulation so long as certain conditions are met. Such activities must 

be conditioned, timed and restricted in a manner that will minimize water quality 

degradation to existing and characteristic uses. 

2. The application of products allowed by this permit to control and eradicate aquatic plants 

and algae is only permitted so long as all the terms and conditions of this permit are 

satisfied, and the transitory water quality impact is limited to the vicinity of the product 

application and to the minimum time necessary to accomplish the desired aquatic pest 

control and/or eradication objectives.

3. The application of products authorized by this permit shall not cause long-term harm to 

the environment.

4. The short-term water quality modification must be limited to hours, days, or weeks for a 

specific pesticide application authorized under this permit. In the event that multiple 

treatments occur over the life of the permit, the total time of the short-term modification 

for all treatments cannot exceed one year.

B. Authorized Discharges

1. Beginning on the effective date of this permit and lasting through the expiration date, the 

Permittee is authorized to discharge aquatic herbicides, algaecides, and associated 

adjuvants, dyes, marker dyes, barley straw, nutrient inactivation, shading products, and 

biological water clarification products as listed in the permit application into surface 

waters of the State. 

2. All discharges shall comply with the Federal Insecticide, Fungicide and Rodenticide Act 

(FIFRA) label requirements, all applicable federal and/or state laws and rules, and any 

additional requirements as specified in this permit. 
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C. Prohibited Discharges

1. The following discharges and treatments are prohibited by this permit.

Any treatment that causes:

a. Oxygen depletion, to the point of stress or lethality to aquatic biota from plant die-off.

b. Unintended impacts to water quality or biota.

c. The mortality of aquatic vertebrates.

2. The application of the products more frequently than, or at concentrations higher than 

levels authorized by this permit, shall constitute a violation of the terms and conditions of 

this permit. 

D. Products Allowed for Use Under This Permit

1. This permit allows application of the following listed pesticides that are labeled for use 

on aquatic sites and any other registered pesticides after they are approved through 

Ecology’s approval process (see Section S11) if the application is made in compliance 

with all the terms and conditions of this permit:

a. 2,4-D: 2,4-Dichlorophenoxyacetic acid, dimethylamine salt

b. 2,4-D: 2,4-Dichlorophenoxyacetic acid, butoxyethyl ester

c. Diquat: Dibromide salt of 6,7-dihydrodipyrido (1,2-a:2’,1”-c) pyrazinediium

d. Endothall (e.g., Aquathol KTM): Dipotassium salt of 7-oxabicyclo[2.2.1]heptane2,3dicarboxylic acid

e. Endothall (e.g., Hydrothol 191TM): mono(N,N-dimethylalkyalmine) salt of 7- 

oxabicyclo[2.2.1]heptane-2,3-dicarboxylic acid 

f. Fluridone: 1-methyl-3-phenyl-5-[3-(trifluoromethyl)phenyl]-4(1H)-pyridinone 

g. Glyphosate: N-(phosphonomethyl)glycine, isopropylamine salt

h. Sodium carbonate peroxyhydrate

i. Imazapyr: 2-(4,5-dihydro-4-methyl-4-(1-methyleth7yl)-5-oxo-1H-imidazol-2-y1)-3-

pyridinecarboxylic acid 

j. Triclopyr TEA: Triethylamine salt of 3,5,6-trichloro-2-pyridyloxyacetic acid 
18

2. The adjuvants listed in Table 1 and any other registered adjuvants that are labeled for use 

on aquatic sites approved by WSDA and Ecology are approved for use in compliance 

with the terms and conditions of this permit. 

Table 1: Listed Adjuvants

Adjuvant (trade name) Product use

Agri-DexTM Crop Oil Concentrate

BondTM Spreader, sticker

Class Act Next 

GenerationTM

Water Conditioning Agent

CompetitorTM Modified Vegetable Oil 

Surfactant

Cygnet PlusTM Surfactant

Dyne-AmicTM Modified Vegetable Oil, 

Organosilicone Surfactant

ExciterTM Surfactant, Water 

Conditioning Agent

IntensifyTM Water Conditioning Agent

InterlockTM Penetrating Agent, Drift 

Control Agent

KineticTM Organosilicone Surfactant 

Blend

LI-700TM Acidifier, Drift Control 

Agent, Surfactant

LiberateTM Drift Control Agent, 

Surfactant

MagnifyTM Water Conditioning Agent

SinkerTM Sinking agent

TacticTM Spreader, sticker

3. Nutrient inactivation products, including aluminum sulfate, sodium aluminate, and 

calcium hydroxide/carbon dioxide and other products approved by Ecology for this type 

of activity are allowed for use in compliance with all of the terms and conditions of this 

permit.

4. Marker dyes for plant control and eradication activities are allowed for use in 

compliance with all of the terms and conditions of this permit.
19

5. Shading products for aquatic plants and algae control activities are allowed for use in 

compliance with all of the terms and conditions of this permit.

6. Water clarification products, including barley straw and bacterial products, are allowed 

for use in compliance with all of the terms and conditions of this permit.

E. Experimental Use Permits

Other herbicides, algaecides, and adjuvants may be applied on a limited basis in the context 

of a research and development effort under the jurisdictions of the Environmental Protection 

Agency (EPA) and WSDA through the issuance of a Federal Experimental Use Permit. 

Coverage under this general permit is required for in-lake projects conducted under a Federal 

Experimental Use Permit.

F. Specific Restrictions on the Application of Products

1. Permittees shall minimize pesticide applications that require public water use restrictions 

during weekends. Permittees shall avoid pesticide applications that require public water 

use restrictions during the opening week of fishing season, Memorial Day weekend, 

Independence Day weekend, and Labor Day weekend.

2. The Permittee shall comply with the specific application restrictions for each product as 

identified in Tables 2 through 5 below.
20

Table 2: Specific Restrictions on the Application of Herbicides and Algaecides for Control and Eradication Projects

Herbicide or 

Algaecide

Subject to 

Fish Timing 

Windows1*

Restrictions/

Advisories 2*

Treatment Limitations Other Specific Restrictions

2, 4 – D 

(amine)

Yes Swimming advisory 

during treatment, and 

24-hour post-treatment

(in the treatment area)

When conducting a control project, do not 

apply within 400 feet of an outlet stream if 

there is an outflow 

N/A

2, 4 – D (ester) N/A

See Other 

Specific 

Restrictions

Swimming restriction 

during treatment, and 

24-hour post-treatment 

(in the treatment area)

N/A Ester formulation is not allowed in 

areas supporting threatened or 

endangered salmon runs. This is a 

year-round restriction. See link 

below: 

http://www.epa.gov/oppfead1/enda

nger/wtc/maps.htm

Diquat Yes Swimming advisory 

during treatment, and 

24-hour post-treatment

(in the treatment area)

Do not treat shoreline vegetation or algae.

Do not pour Diquat directly from container.

N/A

Endothall 

(AquatholTM)

Yes Swimming advisory 

during treatment, and 

24-hour post-treatment

(in the treatment area)

Do not apply within 400 ft of an outlet 

stream if there is an outflow.

N/A

Endothall 

(Hydrothol 

191TM)

Yes Recreational restriction

during and 24-hour after 

treatment (in the entire 

water body)

Use for control of filamentous algae and 

cyanobacteria only, as specified in 

S1.A.2(b) of the permit.

Limit concentrations to 0.2-mg/L of active 

ingredient

Treatment shall occur from the 

shoreline outward into the 

waterbody.

Fluridone No No May not be applied directly to the entire 

littoral zone of a water body more than once 

per permit cycle (unless applied under a 

specific plan for eradication).

N/A

Glyphosate No No N/A N/A

Sodium 

carbonate 

peroxyhydrate

No Swimming advisory 

during treatment, and 2-

hour post-treatment (in 

the treatment area)

Use for control of filamentous algae and 

cyanobacteria only, as specified in 

S1.A.2(b) of the permit.

Shoreline and wetland treatments are 

prohibited.

N/A
21

Table 2: Specific Restrictions on the Application of Herbicides and Algaecides for Control and Eradication Projects (Continued from 

previous page)

Herbicide or 

Algaecide

Subject to 

Fish Timing 

Windows1*

Restrictions/

Advisories 2*

Treatment Limitations Other Specific Restrictions

Imazapyr No No N/A N/A

Triclopyr 

TEA

No Swimming advisory 

during treatment, and 

12-hour post-treatment

(in the treatment area)

Aerial applications are not allowed. Ground 

water monitoring is required prior to any 

third application on a previously treated site 

within a three-year period (for submersed or 

floating-leaved plants only) (see Appendix 

C).

N/A

Note: These restrictions are in addition to the current federal FIFRA label requirements.

*1 The fish timing window was developed by Washington Department of Fish and Wildlife (WDFW) to protect salmon, steelhead, and bull trout populations in the water 

body. http://www.ecy.wa.gov/programs/wq/pesticides/final_pesticide_permits/noxious/noxious_index.html. The table may be periodically updated upon WDFW request 

when new information becomes available. 

*2 Restrictions/Advisories: Recreational restrictions apply to swimming, boating, water skiing, etc. Swimming restrictions apply to primary contact activities, such as 

swimming, wading, and water skiing.
22

Table 3: Specific Restrictions on Application of Products for Inactivation of Phosphorus 

Nutrient 

Reduction 

Products

Subject to 

Fish Timing 

Windows1*

Restrictions/

Advisories 2*

Treatment Limitations Other Specific Restrictions

Aluminum 

sulfate

No No Partial and Whole Lake Treatments

Application shall cease when wind speed 

is greater than 15 miles per hour

Powdered alum shall be mixed with 

water to form a slurry 

The pH of lake water during treatment 

shall remain between 6 and 8.5

Only aluminum compounds suitable for 

water treatment may be used. 

Buffering materials shall be available for 

use

A jar test shall be completed prior to whole 

lake treatments only if a buffer other than 

sodium aluminate is used or a ratio of liquid 

alum to liquid sodium aluminate differs from 

2:1 by volume. 

The purpose of the jar test is to provide data to

maintain the pH of the water body between 6 

and 8.5, not for aluminum dosing 

requirements. 

Follow monitoring requirements stated in 

S7.B.1.

Calcium 

hydroxide/

Carbon 

dioxide

No No The pH shall remain between 6 and 9. A jar test shall be completed prior to treatment

to identify proper dosing levels. pH must be 

measured immediately, one hour, 4 hours, and 

24 hours after treatment. Follow monitoring 

requirements stated in S7.B.2.

Note: The products listed below are not registered as pesticides through FIFRA or regulated under any other federal laws or regulations. A licensed applicator is not needed for the 

application of any of these products to waters of the United States.

*1. The fish timing window was developed by Washington Department of Fish and Wildlife (WDFW) to protect salmon, steelhead and bull trout populations in the water body. 

http://www.ecy.wa.gov/programs/wq/pesticides/final_pesticide_permits/noxious/noxious_index.html. The table may be periodically updated by WDFW when new information 

becomes available. 
23

Table 4: Restrictions on Applications of Barley Straw

Amount needed for algae 

control

Placement in ponds and 

lakes

Time of year for 

placement

Requirements Things to know

Calculate the surface 

area of the water body 

(in square feet or 

acres)

Use lower application 

rates for clear water 

and higher application 

rates for turbid water

Apply 0.3 - 0.8 oz. for 

each 10 square feet, or 

54-225 lbs. per acre, 

or 1-5 bales per acre (1 

bale ≈ 45 lbs.)

Place bags of straw 

where control is 

desired, such as 

around docks and 

swim areas.

Place bags near inlets 

to ponds and small 

lakes to aid in 

aeration or mixing.

Stake or anchor the 

bag in place.

Float or submerse 

bags.

A Hydraulic Project 

Approval (HPA) may 

be required. Contact 

the regional 

Department of Fish & 

Wildlife office prior 

to placing straw.

Straw should 

be placed in 

early spring, 

prior to the 

growth of 

algae.

Use organic straw

if possible. Barley 

crops that are 

treated with 

herbicides should 

not be placed in 

water.

Do not use whole 

bales or tightly 

packed straw.

Loosely pack straw 

in nylon or mesh 

bags.

Remove bags after 

four to six months.

Straw must not be 

left in the water 

over the winter.

Straw will produce a 

dark color in the water 

as it decomposes. This 

color will disappear.

Barley straw takes 4-6 

weeks to produce 

results.

More barley straw is 

not better. Do not 

exceed recommended 

amounts. Too much

straw may degrade 

water quality.

Note: Studies have shown that when barley straw is placed in water, fungi and microorganisms break down the straw to form compounds that inhibit the growth 

of algae. Barley straw is not registered as a pesticide under FIFRA or regulated under any other federal laws or regulations. A licensed applicator is not needed 

for the application of any of this product to waters of the United States.
24

Table 5: Restrictions on Applications of Shading Products, Biological Water Clarifiers, etc.

Product Restrictions

Shading products Do not apply directly to streams or any other body of water that 

discharges to surface waters of the state. 

Biological Water Clarifiers Only for use in water bodies with no discharge to surface 

waters of the state during and for two weeks after treatment.

Note: These restrictions are in addition to the federal FIFRA label requirements (if applicable).

Table 6: Specific Treatment Restrictions for Aquatic Weed Eradication Projects

Plant Treatment Restrictions 

Curly-leaf pondweed (Potamogeton crispus) For eradication projects, the treatment shall occur either early in the turion cycle (usually 

February 1 - April 15) or late in the year (September 1 - October 30).

If using fluridone, concentrations shall not exceed 10 parts per billion.

Eurasian watermilfoil (Myriophyllum spicatum) Early infestation: The preferred herbicides are 2, 4-D and triclopyr. Fluridone, Diquat, and 

endothall may be used if the applicant has demonstrated to Ecology’s satisfaction that 

neither 2, 4-D or triclopyr has been effective in eliminating milfoil, or under special 

circumstances.

Established infestation: Only fluridone, 2, 4-D, and triclopyr are approved for use, unless 

extenuating circumstances exist. In these situations, a different product must be approved 

by Ecology in writing in advance of treatment. If this permit is modified to include 

products that are effective and selective for milfoil eradication, the new products may be 

used only after permit modification.

Brazilian elodea (Egeria densa) For eradication projects, only diquat or fluridone can be used unless a new product is 

shown to be effective on Brazilian elodea.

Note: Herbicide products are available that specifically target different aquatic plants. The purpose of this table is to limit the impact to non-target plants in a water body 

during eradication project.
25

S6. NOTIFICATION AND POSTING REQUIREMENTS

A. Ecology Notification Requirements 

1. Pre- and post-treatment notification – For every week that treatment is planned, the 

Permittee(s) shall email information to Ecology on the form supplied in Appendix D. 

This form shall list the water bodies scheduled for treatment the following week. This 

form shall also detail the treatments that have taken place during the current week. The 

Permittee shall send the email to the appropriate Ecology regional office and Ecology 

headquarters no later than 5:00 pm on Friday of each week during the treatment season.

Central Regional Office, Yakima (509) 575-2490 email: rlat461@ecy.wa.gov

Eastern Regional Office, Spokane (509) 329-3400 email: kmer461@ecy.wa.gov

Northwest Regional Office, Bellevue (425) 649-7000 email: tsho461@ecy.wa.gov

Southwest Regional Office, Lacey (360) 407-6300 email: mhil461@ecy.wa.gov

Water Quality Headquarters, Lacey (360) 407-6400 email: kelm461@ecy.wa.gov

2. Inspection Coordination Requirements

a. At Ecology’s request, each Permittee shall coordinate and schedule inspections with 

the appropriate Ecology regional staff.

b. The agreed upon location and starting time for the inspection shall be on record in 

writing at Ecology. 

c. For inspections scheduled by the Ecology regional staff in Condition S6.A.2.a., the 

Permittee shall not treat unless Ecology staff are present or do not appear within 30 

minutes of the scheduled and agreed upon start time, at the scheduled and agreed 

upon location. 

3. The Permittee shall immediately notify the appropriate Ecology regional office if a spill 

of product(s) covered under this permit occurs into waters of the state, or onto land with a 

potential for entry into waters of the state. The Permittee shall notify the appropriate 

Ecology regional office when they are made aware of any of the following conditions 

occurring during or after a treatment:

a. Any person(s) exhibits or indicates any toxic and/or allergic response as a result of 

the treatment. 

b. Any fish or fauna exhibit stress conditions or die within or downstream of the 

treatment area.
26

The notification shall include: a description of the incident, products involved, names and 

contact information of persons affected, impacts to fish and/or fauna, and suggestions for 

preventing future incidents.

B. Residential and Business Notification 

1. The Permittee(s) shall complete copies of the Residential and Business Notice form

provided by Ecology in Appendix E. No modifications of this template are allowed. 

a. When the product’s label has restrictions and/or precautions for potable or domestic 

water use, irrigation use or livestock watering, the Permittee shall notify those who 

withdraw surface waters for such uses. This notification statement shall identify the 

pesticide(s) being used, the date(s) of expected treatment, and all water use 

restrictions and precautions, including information about who the water user can 

contact to obtain an alternate water supply during treatment. The Permittee shall not 

treat an area until people who withdraw water have been notified and an alternative 

water supply is provided, if requested by the affected water user(s).

b. The Permittee shall send the forms to all residences and businesses within one-quarter 

(1⁄4) mile in each direction along the shoreline or across the water of the areas to be 

treated. 

c. The Permittee shall provide notice to residences or businesses, by mail or newsletter, 

or handbills delivered directly to the residences or businesses. If handbills are used, 

the applicator(s) shall secure the notices to the residences or businesses doorknob in a 

fashion that will hold them in place but will not damage property. If the residence or 

business is gated or guarded by watchdogs, the applicator(s) may secure the notice in 

clear view on the outside of the gateway or may attach the notice to the outside of the 

residence in a fashion that will hold it in place but will not damage property.

d. The Permittee shall notify residents and businesses 10 to 21 days prior to initial 

treatment.

e. The Permittee shall mail, email, or fax a copy of the Residential and Business Notice, 

including the date of distribution, to the appropriate Ecology regional office contact 

no later than one business day following distribution. 

f. The Permittee shall maintain a copy of the notice and a list of locations or addresses 

to which they were sent or delivered for seven years. The Permittee shall hand deliver 

or mail a copy of the notice and list of recipients to Ecology within five business days 

upon request.

2. Residential and Business Notices are not required for applications made to limited access 

highways, fenced wetland mitigation sites, or other facilities where no reasonable public 

access exists.
27

3. If the Residential and Business Notice explains the chemical application schedule for 

the whole season, and there is no deviation from that plan, no further Residential and 

Business Notice will be required for the rest of the season (unless a resident or business 

specifically requests further notification). 

C. Camp Notification Requirements

1. Camps shall notify parents/guardians of campers in writing if a pesticide application is 

expected to occur during or within two weeks prior to their camper attending camp.

2. The written notification shall include:

a. The name of the product being applied,

b. The time period during which the treatment will occur,

c. Any swimming or recreational advisories or restrictions as named in this permit or on 

the product label, and

d. Camp contact information for further questions.

D. Posting Requirements

1. The Permittee shall post signs no more than 48 hours prior to the application of any 

products covered under this permit. (The Permittee shall use templates provided in 

Appendix F). No modifications of this template are allowed, except where Ecology has 

requested that the Permittee fill in label restrictions about the pesticide to be used.

2. The Permittee shall ensure that posted signs remain in place until the end of the period of 

water use restrictions.

3. The Permittee shall remove all old signs before a new treatment begins or before the end 

of the treatment season, whichever comes first.

4. The Permittee shall post warning signs in English and in the language commonly spoken 

by the community that uses the area.

5. Posting Privately or Publicly-Owned Shoreline Areas (excluding public access areas)

a. The Permittee shall post privately or publicly-owned shorelines using the 

templates provided in Appendix F. No modifications of this template are allowed, 

except where Ecology has requested that the Permittee fill in label restrictions about 

the pesticide to be used.
28

b. Sign colors for the first treatment of a water body each season shall be white, the 

second yellow, and the third orange. The sign for the fourth treatment shall be white, 

the fifth yellow, the sixth orange, etc.

c. The Permittee shall post signs to face both the water and the shore and shall place 

signs on each private or public property within ten feet of the shoreline and within 

400 feet of the treatment areas. The Permittee shall post one sign for every 100 feet 

of shoreline. The Permittee shall post signs to be secure from the normal effects of 

weather and water currents, without causing damage to private or public property.

d. No posting is necessary in those areas where public access is limited to boat only 

access. 

6. Posting Shoreline Public Access Areas

Public access areas include: swim beaches, docks, and boat launches at resorts; privatelyowned community access areas; and anywhere that the public can reasonably gain access 

to the shoreline. 

a. Signs shall be a minimum of two feet by three feet in size and shall be constructed of 

a durable weather-resistant material. The sign shall include:

i. The word “CAUTION” in bold black type at least two inches high.

ii. All other words shall be at least 1⁄2 inch high.

b. Signs shall face both the water and the shore and be placed within 25 feet of the 

shoreline. The Permittee shall post one sign along every 100 feet of shoreline in the 

public access areas. The Permittee(s) shall place signs so they are clearly readable by 

people using the access areas. Permittee(s) shall post signs that are secure from the 

normal effects of weather and water currents, but cause no damage to private or 

public property. 

c. The Permittee shall attach an 81⁄2 by 11 inch weather resistant map detailing the 

treatment areas for each product used. The map shall identify the location(s) of the 

product(s) used and mark the reader's location at the public access site. 

d. The Permittee shall post the public notice signs at all of the water body's public 

access areas within one-quarter mile of the treatment area and all of the water body's 

public boat launches within one and one-half miles of the treatment area. 

7. Posting for Indirect Aquatic Applications

a. Posting is not required for roadside applications or applications to mitigated wetland 

areas with no reasonable public access. 
29

b. For those applications containing a publicly accessible area, 

i. Post signs no more than 48 hours prior to an application 

ii. Place signs within 25 feet of any shoreline facing both egress and entrance of any 

boat launch on the water body that is within 1⁄2 mile of any treatment site. Boat 

launches also include sites commonly used as put-ins and take-outs for small, 

non-trailered watercraft. Check the Washington State Parks and Recreation 

Commission publication Public Boating Facilities in Washington State, second

edition, 1988, to identify public accesses. Reference copies of this publication are 

available through the Washington State Library, King County Library, Gonzaga 

University Library, and Washington State University Library. 

c. The Permittee(s) shall use good faith and reasonable effort to ensure that posted signs 

are secured and remain in place. 

d. The Permittee shall post signs so they are secure from the normal effects of weather 

and water currents, but cause no damage to private or public property. 

e. The Permittee is responsible for removal of all signs at the end of the treatment 

season. Biodegradable sign material may be used so that removal is not necessary. 

f. The Permittee shall post signs in English and the language, if other than English, 

commonly spoken by the community that uses the area. 

8. Posting on the Water

a. The Permittee shall post buoys on the water when any of the following conditions are 

met for the treatment of submersed, floating, or floating-leaved plants:

i. The product has recreational and/or fish consumption restrictions,

ii. The water body is greater than one acre and/or more than 200 feet from the 

treatment area to the opposite shore, or

iii. The entire shoreline has not been posted.

b. Posted buoys shall have:

i. Durable weather-resistant signs

ii. Signs readable from two opposing directions

iii. Signs positioned so they are completely out of the water
30

iv. Signs that are a minimum 81⁄2 by 11 inches in size. 

v. The signs shall include:

1. The word “CAUTION” in bold black type at least one inch high.

2. All other words shall be at least 1⁄4 inch high, and indicate the use restriction(s) 

for the pesticide applied.

c. Sign colors for each treatment of a water body each season shall be white.

d. The Permittee shall space buoys as follows: one buoy at each approximate corner of 

the treatment area and one buoy at each 100 foot interval around the treatment area. 

S7. MONITORING REQUIREMENTS

A. Application of Herbicides, Algaecides, and Nutrient Inactivation Products

1. Eradication Projects - Ecology’s aquatic plant specialist will establish monitoring 

requirements for any monitoring conducted under the Aquatic Weeds Management Fund 

grant program for eradication of submersed, floating, or floating-leaved plants in lakes.

2. Control Projects

a. The Permittee shall conduct pre- and post-treatment monitoring for dissolved oxygen 

when contact herbicides are used in lakes that are 303(d)-listed for low dissolved oxygen.

b. The Permittee shall conduct pre-treatment monitoring on the day of treatment, 

immediately prior to the treatment. The Permittee shall monitor for dissolved oxygen 

concentration at the surface and near the bottom, at the center, and the edge of the 

proposed treatment area. 

c. The Permittee shall conduct post-treatment monitoring no earlier than five days and no 

later than seven days after the treatment, at the same time of day that the pre-treatment 

monitoring occurred and at the same sites and depths. 

d. The Permittee shall submit all monitoring data in writing to Ecology within one month of 

herbicide treatment. Please refer to S8.E. for information on sampling procedures and 

quality assurance.

3. Control Projects in the Lake Washington Ship Canal

a. Any Permittee using a contact herbicide shall conduct pre- and post-treatment dissolved 

oxygen monitoring for any treatment site over three acres in size (in total for the 

treatment season). 
31

b. The Permittee shall conduct pre-treatment monitoring midday (between 10am-3pm) on 

each of the three days prior to treatment. The Permittee shall monitor for dissolved 

oxygen in the center of the area to be treated and in a vegetated area that will not be 

treated. Samples shall be taken at the surface, mid-depth, and one foot from the lake 

bottom in each area.

c. The Permittee shall conduct post-treatment monitoring for each of five days following 

treatment. Sampling shall occur at the same time, sampling locations, and depths as the 

pre-treatment monitoring. 

d. The Permittee shall submit all monitoring data in writing to Ecology within one month of 

herbicide treatment. Please refer to S8.E for information on sampling procedures and 

quality assurance.

B. Application of Phosphorus Inactivation Products

1. For aluminum sulfate or sodium aluminate (alum) treatment in any lake system, the Permittee

shall monitor, at a minimum, for pH once in the morning and once in the afternoon for the 

duration of the treatment. 

a. If the pH decreases to less than 6.2, the Permittee shall sample and analyze for alkalinity. 

b. The Permittee shall take Secchi disk measurements before and after application.

c. For continuous injection systems, the Permittee shall monitor pH once a day for the 

duration of the injection process.

d. For whole lake and continuous injection treatments, the Permittee shall ensure that pH 

measurements represent lake-wide conditions, unless the injection system is 

hydrologically isolated from the main lake volume (e.g., in a bay with a narrow throat). 

For hydrologically isolated areas of water bodies, the Permittee shall sample pH at the 

end of the bay and in the main lake.

2. For calcium hydroxide/carbon dioxide treatment, the Permittee shall conduct pH monitoring

once on the day before treatment, and once in the morning and once in the afternoon during 

treatment and for ten days following treatment. 

a. If the pH is above 9.0, the Permittee shall stop treatment. 

b. For continuous injection systems, the Permittee shall monitor pH once in the morning 

and once in the afternoon while the system is in operation.

3. The Permittee shall submit all monitoring data in writing to Ecology within one month of 

treatment.

S8. SAMPLING AND ANALYTICAL PROCEDURES
32

A. EPA publishes laboratory analytical methods used by industries and municipalities to 

analyze the chemical and biological components of wastewater, drinking water, sediment, 

and other environmental samples that are required by EPA regulations under the authority of 

the Clean Water Act and the Safe Drinking Water Act. Most of these methods are published 

by EPA as regulations at 40 CFR Part 136 or in the latest revision of Standard Methods for 

the Examination of Water and Wastewater (APHA). The Permittee shall use either an EPA 

method or one of the methods specified below to fulfill the monitoring requirements of this 

permit. 

B. With the exception of certain parameters used for process control the permit requires all 

monitoring data to be prepared by a laboratory registered or accredited under the provisions 

of Chapter 173-50 WAC, Accreditation of Environmental Laboratories. 

C. Dissolved oxygen, pH, alkalinity titration, and Secchi disk sampling do not require 

accreditation for monitoring under this permit. 

D. Analyses conducted using enzyme linked immunosorbent assay (ELISA) methods may 

substitute for the requirements in paragraph A of this section. 

E. All dissolved oxygen and pH monitoring shall follow the protocols in “A Citizens Guide to 

Understanding and Monitoring Lakes and Streams,” found at this link: 

http://www.ecy.wa.gov/programs/wq/plants/management/joysmanual/index.html. 

S9. REPORTING AND RECORDKEEPING REQUIREMENTS

The Permittee shall report in accordance with the following conditions. Falsification of 

information submitted to Ecology is a violation of the terms and conditions of this permit and is 

punishable by both civil and criminal enforcement.

A. Annual Reporting

1. Eradication and Control Projects

a. The Permittee shall submit all treatment information and monitoring results obtained 

during the most recent treatment season to Ecology’s Water Quality Headquarters 

office. 

b. The Permittee shall submit the report no later than November 30th of the year the 

treatment occurred (November 1-October 31).

c. The Permittee shall submit annual treatment/monitoring reports regardless of whether 

or not treatment or monitoring occurred. 

d. The Permittee shall complete the online report system each year, and then print it, 

sign and date it before sending to: 
33

Aquatic Pesticides Permitting

Department of Ecology, Water Quality Program

P.O. Box 47600

Olympia, WA 98504-7600

2. The Permittee shall submit the following information in the annual report using the 

online reporting system:

a. Name of water body,

b. Date(s) treatment occurred,

c. List of chemicals used,

d. Amount of product applied,

e. Acreage treated,

f. Results of required monitoring , and

g. Plant species targeted.

B. Records Retention

1. The Permittee shall retain a copy of this permit and records of all monitoring information 

for a minimum of five years. Such information shall include all calibration and 

maintenance records, all original recordings for continuous monitoring instrumentation, 

copies of all reports required by this permit, plant surveys, and records of all data used to 

complete the application for this permit. 

2. The period of retention shall be extended during the course of any unresolved litigation 

regarding the discharge of pollutants by the Permittee or when requested by the Director 

of Ecology.

C. Recording of Results

For each measurement or sample taken, the Permittee shall record the following information: 

1. The date, exact place, sampling method, and time of sampling or measurement,

2. The individual who performed the sampling or measurement,
34

3. The dates the analyses were performed,

4. The name of the laboratory or individual who performed the analyses,

5. The analytical techniques or methods used,

6. Method detection limit (MDL),

7. Laboratory practical quantitation limit (PQL), and 

8. The results of all analyses. 

D. Additional Monitoring by the Permittee

If the Permittee monitors any parameter more frequently than required by this permit using 

test procedures specified by Section S8 of this permit, the Permittee may submit the results of 

the additional monitoring in the annual report.

E. Noncompliance Notification

In the event the Permittee is unable to comply with any of the terms and conditions of this 

permit for any cause, the Permittee shall:

1. Immediately stop the activity causing the noncompliance, and correct the problem

2. Immediately notify Ecology of the failure to comply.

3. Return to compliance as quickly as possible.

S10. SPILL PREVENTION AND CONTROL

A. Spill Prevention

1. The Permittee shall have the following materials and supplies on site during treatment: 

a. A waterproof list of the appropriate Ecology telephone numbers to call in the event of 

a spill.

b. Absorbent materials for cleanup, or, in the event of a dry chemical spill, the spill 

containment materials recommended in the Material Safety Data Sheet (MSDS) for 

that product.

c. The appropriate cleanup materials for a spill of the specific products being applied.
35

2. The Permittee shall store, handle, and use all oil, fuel, chemicals, or products authorized 

under this permit in a manner that prevents spills to waters of the state.

3. The Permittee shall ensure that mobile equipment that enters waters of the state during 

the treatment process is maintained to prevent leaks or spills of petroleum products. 

B. Spill Notification Requirements

The Permittee shall report spills into waters of the state or on land with a potential for entry 

into waters of the state, or other significant water quality impacts to the appropriate Ecology 

Regional Office (see S6.A.) as soon as possible after the spill takes place. 

C. Spill Cleanup Requirements

1. In the event the Permittee’s actions/inactions result in the spill or leak of oil, fuel, 

chemicals, or products into waters of the state, or onto land with a potential for entry into 

waters of the state, the Permittee shall begin immediate containment and cleanup. 

2. The Permittee shall complete cleanup using appropriate materials as soon as possible. 

Cleanup shall take precedence over normal work. 

3. Cleanup shall include proper disposal of any spilled materials and used cleanup materials.

S11. CONDITIONAL APPROVAL FOR THE USE OF PRODUCTS NOT SPECIFIED IN 

THE CURRENT PERMIT

A. Product Approval

This permit allows the use of products not specifically listed if all of the following 

procedures are followed: 

1. Pesticides shall be approved for the specific use by EPA and/or WSDA.

2. Pesticides not specifically allowed for use under this permit shall undergo a risk 

assessment process and to be approved by Ecology. This risk assessment is an evaluation 

of the product, independent of the risk assessment performed by EPA during the 

registration process, and is intended to be more specific to Washington State concerns.

The risk assessment shall: 

a. Be prepared by a qualified toxicologist. 

b. Include, at a minimum: 
36

i. Qualifications of the toxicologist(s) who prepared the risk assessment;

ii. Verification that the product will meet the specified general conditions and 

prohibitions of this permit;

iii. Information about human health effects from the product, acquired since the 

issuance of EPA’s most recent risk assessment on the active ingredient;

iv. A summary and assessment of the peer-reviewed literature concerning the product 

since the issuance of EPA’s most recent risk assessment;

v. All available environmental and ecological information about the product and its 

environmental fate and effects; and 

vi. Mitigation measures for the use of the product; and

vii. Be approved by Ecology.

3. Adjuvants shall be approved by Ecology after undergoing a review by WSDA and the 

completion of the SEPA process.

B. Public Notification Procedures

After Ecology’s approval of the risk assessment, Ecology shall conduct public notification in 

the state register and make the notification available for posting on Ecology’s website. The 

notice shall provide:

1. The chemical name and the brand name(s), 

2. The expected uses of the product,

3. A summary of the expected environmental and human health effects,

4. Information about how to obtain copies of the risk assessment, and 

5. Information about how to comment on the proposed use of the chemical within the 30-

day comment period. 

6. Comments submitted during this process should be submitted to:

Aquatic Pesticide Specialist

Department of Ecology, Water Quality Program

P.O. Box 47600

Olympia, WA 98504-7600
37

C. Approval of a New Product

1. Based on any additional valid scientific information provided during the public comment 

period, Ecology may either grant, condition, or deny approval for the use of the new 

product. 

2. Following approval, Ecology will modify this permit to condition the product’s use. 

S12. MITIGATION FOR PROTECTION OF SENSITIVE, THREATENED, OR 

ENDANGERED PLANTS: CONTROL PROJECTS

A. Requirement for a Sensitive, Threatened, or Endangered Plant Survey

1. If Ecology notifies the Permittee that there is a sensitive, threatened, or endangered 

plant species present in a proposed treatment area, the Permittee shall complete a 

detailed plant survey (unless exempted from this requirement in writing by Ecology,

pending consultation with DNR Natural Heritage Program staff). 

2. The survey shall be performed by a professional aquatic botanist or wetland 

specialist. The person hired to conduct the aquatic plant survey shall be independent 

of the planned project.

3. The survey shall be conducted when plants are present and can be positively 

identified, but not earlier than three months prior to any chemical treatment. The three 

month restriction can be waived if the plant cannot be positively identified in the 

three months prior to the planned treatment. 

4. The Permittee shall conduct a plant survey annually for sensitive, threatened, or 

endangered submersed, floating, or floating-leaved plants, and once every five years 

for sensitive, threatened or endangered emergent shoreline vegetation. The Permittee 

shall submit the plant survey to Ecology no later thirty days prior to the planned 

treatment each year.

B. Mitigation Measures

1. After a plant survey is completed, the Permittee shall apply prescribed buffers (where 

required), and select one or more of the appropriate mitigation choices listed below to 

minimize the impact of the proposed pesticide treatment on the specific type of 

sensitive, threatened, or endangered plant. Monitoring the vitality of rare plant 

populations may be required by Ecology.

2. Appropriate mitigation measures include:

a. For Submersed, Floating, or Floating-leaved Plants: If the sensitive, threatened, or

endangered plant is submersed, floating, or floating-leaved, and the herbicide 

application is intended to control submersed species, the Permittee shall apply the 
38

provided buffer and choose one or more of the following mitigation measures to 

protect the rare plants:

i. Maintain a buffer of 100 feet from the rare plant when using herbicides that 

are fast-acting, deactivate quickly and are known to have minimal dissipation. 

For herbicides that are active in the water column for an extended period and 

dissipate widely (such as fluridone), the Permittee shall consult with Ecology. 

ii. Use a selective herbicide (if applicable). 

iii. Use the lowest effective concentration of herbicide for the target plant if the 

Permittee can demonstrate that the rare plant is resistant to the herbicide at 

that concentration.

iv. Use barriers (silt curtains) to protect the sensitive, threatened, or endangered

plant.

v. If the Permittee has difficulty maintaining a buffer of 100 feet from the 

majority of floating sensitive, threatened, or endangered plants, the Permittee 

shall consult with Ecology for other options (such as physically relocating the 

plants).

b. For Floating-leaved or Emergent Plants (target is a noxious weed): If the 

sensitive, threatened, or endangered plant is floating-leaved or emergent, and the 

targeted noxious weeds will be treated above the water, the Permittee shall select 

an application technique designed to cause less non-target damage (e.g., low-drift 

nozzle heads, wiper applications, sponge bars, etc) and use marker dyes. 

c. Floating-leaved or Emergent Plants (target is a nuisance plant): If the sensitive, 

threatened, or endangered plant is floating-leaved or emergent, and the targeted 

plants are being treated above the water, the Permittee shall apply the prescribed 

buffer and choose one or more of the following mitigation measures to protect the 

rare plants:

i. Maintain a treatment buffer of 10 feet from the sensitive, threatened, or 

endangered plant.

ii. Select an application technique designed to cause less non-target damage 

(e.g., low-drift nozzle heads, wiper applications, sponge bars, etc.). 

iii. Apply the herbicide when it will not impact the sensitive, threatened, or 

endangered plant (time the treatment during the growing season to prevent 

impacts to the sensitive, threatened, or endangered species).

iv. Cover plant(s) with a non-permeable material.
39

S13. APPENDICES

All appendices are incorporated by reference into this permit and are subject to enforcement. 
40

GENERAL CONDITIONS

G1. DISCHARGE VIOLATIONS

The Permittee shall at all times be responsible for continuous compliance with the terms and 

conditions of this general permit. The Permittee shall be responsible for compliance with 

any order, directive, or penalty issued by Ecology.

G2. PROPER OPERATION AND MAINTENANCE

The Permittee shall at all times properly operate and maintain any facilities or systems of 

control to achieve compliance with the terms and conditions of the general permit. Where 

design criteria have been established, the Permittee shall not allow flows or waste loadings 

to exceed approved design criteria or approved revisions thereto. The permittee shall 

properly operate and maintain all application equipment to achieve compliance with the 

terms and conditions of the permit. The permittee shall not allow concentrations of the 

product(s) to exceed label or permit conditions. 

G3. RIGHT OF ENTRY

The Permittee shall allow an authorized representative of Ecology, upon the presentation of 

credentials and such other documents as may be required by law, at reasonable times:

A. To enter upon the permittee or sponsor’s premises to which an effluent source (discharge) 

occurs or in which any records are required to be kept under the terms and conditions of 

this general permit;

B. To have access to and to copy at reasonable costs, any records required to be kept under 

terms and conditions of the permit;

C. To inspect any postings, monitoring equipment, or method of monitoring required in this 

general permit; and/or

D. To sample any discharge of pollutants. If the sampling of influent or internal hatchery 

waters is necessary, the Permittee will be provided the opportunity to collect the required 

sample. 

G4. NOTIFICATION OF CHANGE IN COVERED ACTIVITIES

The Permittee shall submit a Change in Activities form to Ecology when a project activity 

changes from eradication to control, and vise versa.

G5. REVOCATION OF COVERAGE
41

Pursuant to Chapter 43.21B RCW and Chapter 173-226 WAC, the Director may require any 

discharger authorized by this general permit to apply for and obtain coverage under an 

individual permit or another more specific and appropriate general permit. Cases where 

revocation of coverage may be required include, but are not limited to the following:

A. Violation of any term or condition of this general permit.

B. Obtaining coverage under this general permit by misrepresentation or failure to disclose 

fully all relevant facts.

C. A change in any condition that requires either a temporary or permanent reduction or 

elimination of the permitted discharge.

D. Failure or refusal of the Permittee to allow entry as required in RCW 90.48.090.

E. A determination that the permitted activity endangers human health or the environment, 

or significantly contributes to water quality standards violations.

F. Nonpayment of permit fees or penalties assessed pursuant to RCW 90.48.465 and 

Chapter 173-224 WAC.

G. Failure of the Permittee to satisfy the public notice requirements of WAC 173-226-

130(5), when applicable.

Permittees who have their coverage revoked for cause according to WAC 173-226-240, as 

listed immediately above, may request temporary coverage under this permit during the time 

an individual permit is being developed, provided the request is made within 90 days from 

the time of revocation and is submitted along with a complete individual permit application 

form.

G6. GENERAL PERMIT MODIFICATION OR REVOCATION

General permits may be modified, or revoked and reissued, in accordance with the provisions 

of Chapter 43.21B RCW and Chapter 173-226 WAC. Grounds for modification or 

revocation and reissuance include, but are not limited to, the following:

A. When a change that occurs in the technology or practices for control or abatement of 

pollutants applicable to the category of dischargers covered under this general permit.

B. When effluent limitation guidelines or standards are promulgated pursuant to the Federal 

Water Pollution Control Act or Chapter 90.48 RCW for the category of dischargers 

covered under this general permit.

C. When a water quality management plan containing requirements applicable to the 

category of dischargers covered under this general permit is approved.
42

D. When information is obtained, which indicates that cumulative effects on the 

environment from dischargers covered under this general permit are unacceptable.

G7. REPORTING A CAUSE FOR REVOCATION OF COVERAGE

A Permittee who knows or has reason to believe that any activity has occurred or will occur 

which would constitute cause for revocation under condition G6 or 40 CFR 122.62 shall 

report such information to Ecology so that a decision can be made on whether action to 

revoke coverage under this general permit will be required. Ecology may then require 

submission of a new Application for Coverage under this or another general permit or an 

application for an individual permit. Submission of a new application does not relieve the 

Permittee of the duty to comply with all the terms and conditions of the existing general 

permit until the new application for coverage has been approved.

G8. TRANSFER OF PERMIT COVERAGE

Coverage under this general permit is automatically transferred to a new Permittee if:

A. A written signed agreement between the old and new Permittee containing a specific date 

for transfer of permit responsibility and coverage is submitted to Ecology; and

B. Ecology does not notify the old and new Permittee of its intent to revoke coverage under 

the general permit in which case the transfer is effective on the date specified in the 

written agreement between the old and new Permittee.

G9. TOXIC POLLUTANTS

The Permittee shall comply with effluent standards or prohibitions established under Section 

307(a) of the Clean Water Act for toxic pollutants within the time provided in the 

regulations that establish those standards or prohibitions, even if this permit has not yet been 

modified to incorporate the requirement.

G10.OTHER REQUIREMENTS OF TITLE 40 CODE OF FEDERAL REGULATIONS

All other applicable requirements of 40 CFR 122.41 and 122.42 are incorporated in this 

general permit by reference.

G11.COMPLIANCE WITH OTHER LAWS AND STATUTES

Nothing in the permit shall be construed as excusing the Permittee from compliance with 

any applicable federal, state, or local statutes, ordinances, or regulations.

G12.ADDITIONAL MONITORING REQUIREMENTS

Ecology may establish specific monitoring requirements in addition to those contained in 

this general permit by administrative order or permit modification.
43

G13.REMOVED SUBSTANCES

Collected screenings, grit, solids, sludges, filter backwash, or other pollutants removed in 

the course of treatment or pollution control of wastewaters shall not be resuspended or 

reintroduced to the final effluent stream for discharge to state waters. Such removed 

substances shall be lawfully disposed in an appropriate manner and shall comply with 

Chapter 173-303 WAC and Chapter 173-304 WAC.

G14.SIGNATORY REQUIREMENTS

All applications, reports, or information submitted to Ecology shall be signed and certified. 

A. All permit applications shall be signed by either a responsible corporate officer of at least 

the level of vice president of a corporation, a general partner of a partnership, the 

proprietor of a sole proprietorship or ranking elected official. For direct applications of 

herbicides and algaecides the application shall be signed by the sponsor and the 

applicator(s), except when coverage is issued to a government entity. For applications 

under a roadside vegetation plan, the permit application shall be signed by the sponsor, 

which may be the agency director or the directors designee.

B. All reports required by this permit and other information requested by Ecology shall be 

signed by a person described above or by a duly authorized representative of that person. 

A person is a duly authorized representative only if:

1. The authorization is made in writing by a person described above and submitted to 

Ecology.

2. The authorization specifies either an individual or a position having responsibility for 

the overall operation of a regulated facility, such as the position of plant manager, 

superintendent, position of equivalent responsibility, or an individual or position 

having overall responsibility for environmental matters. (A duly authorized 

representative may thus be either a named individual or any individual occupying a 

named position.)

3. For direct herbicides and algaecides treatments the reports may be signed by either 

the sponsor or the applicator(s). For treatments under the roadside vegetation 

management plan, the sponsor may sign the reports.

C. Changes to authorization. If an authorization under paragraph B.2. above is no longer 

accurate because a different individual or position has responsibility for the overall 

operation of the facility, a new authorization satisfying the requirements of paragraph 

B.2. above shall be submitted to Ecology prior to or together with any reports, 

information, or applications to be signed by an authorized representative. For multi-year 

coverage under this permit, if the sponsor hires a contractor other than the original 
44

applicant, the sponsor shall send a written notification to Ecology. This notification is 

signed by the sponsor and the new contractor applicant.

D. Certification. Any person signing a document under this section shall make the following 

certification:

I certify under penalty of law, that this document and all attachments were prepared under 

my direction or supervision in accordance with a system designed to assure that qualified 

personnel properly gathered and evaluated the information submitted. Based on my 

inquiries of the person or persons who manage the system, or those persons directly 

responsible for gathering information, the information submitted is, to the best of my 

knowledge and belief, true, accurate and complete. I am aware that there are significant 

penalties for submitting false information, including the possibility of fines and 

imprisonment for knowing violations.

G15.REQUESTS TO BE EXCLUDED FROM COVERAGE UNDER A GENERAL

PERMIT

Any discharger authorized by this general permit may request to be excluded from coverage 

under this general permit by applying for an individual permit. The discharger shall submit 

to the Director an application as described in WAC 173-220-040 or WAC 173-216-070, 

whichever is applicable, with reasons supporting the request. The Director shall either issue 

an individual permit or deny the request with a statement explaining the reason for the 

denial.

G16.APPEALS

The terms and conditions of this general permit:

A. As they apply to the appropriate class of dischargers are subject to appeal within thirty 

(30) days of issuance of this general permit in accordance with Chapter 43.21(B) RCW 

and Chapter 173-226 WAC; and

B. As they apply to an individual discharger are subject to appeal in accordance with 

Chapter 43.21(B) RCW within thirty (30) days of the effective date of coverage of that 

discharger.

Consideration of an appeal of general permit coverage of an individual discharger is limited 

to the general permit's applicability or non-applicability to that discharger. Appeal of this 

general permit coverage of an individual discharger shall not affect any other individual 

dischargers. If the terms and conditions of this general permit are found to be inapplicable to 

any discharger(s), the matter shall be remanded to Ecology for consideration of issuance of 

an individual permit or permits.

G17.DUTY TO REAPPLY
45

Any Permittee receiving coverage for the length of this permit shall reapply for coverage 

under this general permit at least one hundred and eighty (180) days prior to the specified 

expiration date of this general permit. An expired general permit continues in force and 

effect until a new general permit is issued or until Ecology cancels it. Only those facilities 

that reapply for coverage are covered under the continued permit.

G18.TERMINATION OF INDIVIDUAL PERMITS

Any previously issued individual permit shall remain in effect until terminated in writing by 

Ecology, except that extension of an expired individual permit (pursuant to WAC 173-

220-180(5)) shall terminate upon coverage under this general permit.

G19.TERMINATION OF COVERAGE UPON ISSUANCE OF AN INDIVIDUAL

PERMIT

When an individual permit is issued to a discharger otherwise subject to this general permit, 

the coverage under this general permit for that Permittee is terminated on the effective date 

of the individual permit.

G20.ENFORCEMENT

Any violation of the terms and conditions of this general permit, the state Water Pollution 

Control Act, and the federal Clean Water Act, will be subject to the enforcement sanctions, 

direct and indirect, as provided for in WAC 173-226-250.

G21.SEVERABILITY

The provisions of this general permit are severable, and if any provision of this general 

permit, or application of any provision of this general permit to any circumstance, is held 

invalid, the application of such provision to other circumstances and the remainder of this 

general permit shall not be affected thereby.

G22.PAYMENT OF FEES

The Permittee shall submit payment of fees associated with this permit as assessed by 

Ecology.
46

APPENDIX A - DEFINITIONS AND ACRONYMS 

All definitions listed below are for use in the context of this permit only.

303(d): Section 303(d) of the federal Clean Water Act requires states to develop a list of polluted 

water bodies every two years. For each of those water bodies, the law requires states to develop 

Total Maximum Daily Loads (TMDLs). A TMDL is the amount of pollutant loading that can 

occur in a given water body (river, marine water, wetland, stream, or lake) and still meet water 

quality standards.

Adjuvant: An additive that enhances the effectiveness of the primary chemical (such as a 

surfactant).

Algae: Primitive, chiefly aquatic, one-celled or multicellular plant-like organisms that lack true 

stems, roots, and leaves but usually contain chlorophyll. 

Algaecide: A chemical compound that kills or reduces the growth of algae or cyanobacteria.

Allowed: Permitted in compliance with the terms and conditions of this permit.

Applicant: the licensed pesticide applicator and any other entity choosing to get coverage.

Application area: The area where herbicides, algaecides, adjuvants, dyes, or nutrient inactivation 

products are directly applied.

Application schedule: The proposed treatment date(s) for a specific water body during one 

treatment season. 

Aquatic pest control: The control of aquatic pests (such as fish, insects, algae, and plants) of 

water areas including but not limited to canals, rivers, streams, lake, ponds, marshes and water 

supply pipelines.

Barley straw: A straw product that, when used according to the instructions in the permit, may 

potentially improve water clarity in ponds and other small freshwater systems.

Beneficial uses: As defined by WAC 173-201A-200:

a) Aquatic life uses. Aquatic life uses are designated using the following categories of key 

species. It is required that all indigenous fish and non-fish aquatic species be protected in 

waters of the state in addition to the key species described below.

b) The categories for aquatic life uses are:

i. Char. For the protection of spawning and early tributary rearing (e.g., first year 
47

juveniles) of native char (bull trout and Dolly Varden), and other associated aquatic 

life.

ii. Salmon and trout spawning, core rearing, and migration. For the protection of 

spawning, core rearing, and migration of salmon and trout, and other associated 

aquatic life.

iii. Salmon and trout spawning, noncore rearing, and migration. For the protection of 

spawning, noncore rearing, and migration of salmon and trout, and other associated 

aquatic life.

iv. Salmon and trout rearing and migration only. For the protection of rearing and 

migration of salmon and trout, and other associated aquatic life.

v. Non-anadromous interior redband trout. For the protection of waters where the only 

trout species is a non-anadromous form of self-reproducing interior redband trout (O. 

mykis), and other associated aquatic life.

vi. Indigenous warm water species. For the protection of waters where the dominant 

species under natural conditions would be temperature tolerant indigenous 

nonsalmonid species. Examples include dace, redside shiner, chiselmouth, sucker, 

and northern pikeminnow.

vii. Miscellaneous uses. The miscellaneous fresh water uses are wildlife habitat, 

harvesting, recreational uses, commerce and navigation, boating, and aesthetics. 

viii. General criteria. General criteria that apply to all aquatic life fresh water uses are

described in WAC 173-201A-260 (2)(a) and (b), and are for:

1. Toxic, radioactive, and deleterious materials; and

2. Aesthetic values.

ix. Aquatic life temperature criteria. Except where noted, water temperature is measured 

by the 7-day average of the daily maximum temperatures (7-DADMax). Table 200 

(1)(c) lists the temperature criteria for each of the aquatic life use categories.

Biological water clarifiers: Microbial or bacterial products sold for the purpose of naturally 

“cleansing” a water body of pollutants.

Camp: This refers to those recreation facilities in operation for children or adults during the 

treatment season (May-September).
48

Constructed water body: A human-made water body in an area that is not part of a previously 

existing watercourse, such as ponds, streams, wetlands, etc.

Control: Any type of chemical treatment intended to protect beneficial uses of a water body. This 

could include the removal of native plants, non-native non-noxious plants, algae, and noxious or 

quarantine-list weeds (that are not being eradicated lake-wide).

Cyanobacteria (blue green algae): A group of usually unicellular photosynthetic organisms 

without a well-defined nucleus; sometimes called "blue-green algae" although they are not 

actually algae.

Defined navigation channels: clearly delineated areas that are intended to provide safe access to 

different sections of the water body by boat.

Defined swim channels: Clearly delineated areas intended for safe passage of swimmers between 

swimming areas on a water body.

Early infestation: A situation in which a state-listed noxious weed, quarantine list weed, or nonnative invasive species is discovered in the pioneer stages of growth in a lake (less than 20 

percent of the littoral zone is infested). 

Eradication: Eradication is the permanent removal of all non-native, invasive aquatic plants of 

one or more species within a water body or along a shoreline.

Established infestation: A state-listed noxious weed, quarantine list weed, or non-native invasive 

species is widespread within a lake (more than 20 percent of the littoral zone is infested). 

Filamentous algae: Algae that grows in long strings or mats in water.

Floating plants: Plants that are not rooted in the sediment.

Floating-leaved plants: Plants that are rooted in the sediment but have leaves at the water’s 

surface (such as waterlilies). 

Herbicide: Any substance or mixture of substances intended to prevent, destroy, repel, or 

mitigate any weed or other higher plant. RCW 17.21.020.

High use areas: Any community boat launches, public boat launches, marinas (both public and 

private), public or community swim beaches, and canals.

Identified and/or emergent wetlands: 

Identified wetlands are those identified by either local, state, or federal agencies. 

Emergent wetlands are characterized by plants growing with their roots underwater and 

leaves extending above the water.
49

In-lake: Plants that are submersed, floating, or floating-leaved, and exist in a water body 

identified as a lake or pond, but not a wetland.

Intentionally applied: The area that a pesticide is directly applied to. This does not include 

pesticide drift, or other unintended pesticide movement.

Invasive: Tending to spread and then dominate the new area. Some non-native species can 

become invasive when introduced outside of their native range. 

Licensed pesticide applicator: Any individual who is licensed as a commercial pesticide 

applicator, commercial pesticide operator, public operator, private-commercial applicator, 

demonstration and research applicator, or certified private applicator, or any other individual 

who is certified by the director of WSDA to use or supervise the use of any pesticide which is 

classified by the EPA as a restricted use pesticide or by the state as restricted to use by certified 

applicators only.

Littoral zone: The area from the water body’s edge to the maximum water depth where plant 

growth occurs. 

Marker dyes: Colorants that are sprayed onto the targeted weed along with the herbicide. Marker 

dyes allow better targeting of herbicide sprays since treated and untreated areas are clearly 

visualized. 

Native and non-native plants: Plants that are indigenous to the region, or non-native plants that 

are not currently on Washington State’s quarantine list or noxious weed list.

NOI: Notice of Intent (to apply for coverage). This is another term used to describe the 

completed application form.

Non-native: A plant living outside of its natural or historical range of distribution. Plants 

considered to be nonnative were not present in Washington prior to European settlement. Not all 

non-native plants are considered to be noxious plants. 

Noxious weed: A legal term (RCW 17.10) that means a non-native plant that when established is 

highly destructive, competitive, or difficult to control by cultural or chemical practices.

Nuisance aquatic weeds: Non-noxious aquatic plants which are at a density and location so as to 

substantially interfere or eliminate activities such as boating, swimming, fishing, waterskiing, or 

other beneficial uses of the water. 

Nutrient inactivation: The use of chemical precipitants to bind soluble reactive phosphorus into 

an insoluble form that is unavailable to aquatic organisms, to clarify the water column, and to 

reduce the release of phosphorus from the sediments. 

Permittee: the licensed applicator and any other entities who have obtained coverage under the 

permit.
50

Pesticide: Chapter 15.58.030 (31) "Pesticide" means, but is not limited to:

a) Any substance or mixture of substances intended to prevent, destroy, control, repel, or 

mitigate any insect, rodent, snail, slug, fungus, weed, and any other form of plant or 

animal life or virus, except virus on or in a living person or other animal which is 

normally considered to be a pest or which the director may declare to be a pest;

b) Any substance or mixture of substances intended to be used as a plant regulator, defoliant 

or desiccant; and 

c) Any spray adjuvant, such as a wetting agent, spreading agent, deposit builder, adhesive, 

emulsifying agent, deflocculating agent, water modifier, or similar agent with or without 

toxic properties of its own intended to be used with any pesticide as an aid to the 

application or effect thereof, and sold in a package or container separate from that of the 

pesticide with which it is to be used. RCW 17.21.020. 

Phytoplankton: Photosynthetic plankton, mainly unicellular algae

Potentially invasive plants: Plants that are not indigenous to the region, and have been shown to 

have invasive tendencies.

Private property: Any property owned by a single person or multiple persons that provides no 

public access to a water body.

Privately or publicly-owned shorelines: Any shoreline area without public access, owned by 

either an individual or a public entity.

Professional aquatic botanist: A biologist who specializes in the study and identification of 

aquatic plants, and has no personal or private investment in the outcome of the survey 

performed.

Public access: Identified legal passage to any of the public waters of the state, assuring that 

members of the public have access to and use of the public waters for recreational purposes.

Qualified toxicologist: A person with a Ph.D in toxicology or in a health or ecological science 

with an emphasis in toxicology, or a person with a Master’s degree in toxicology or a related 

science with an emphasis in toxicology, who is working in the field of toxicology.

Recreational restriction: This restriction should be posted on all public signs and refers to any 

activities that result in direct water contact (i.e. swimming, water skiing, wading, fly fishing, etc) 

in the area that has been treated.

Recreational use: Water used for water skiing, boating, boat access, swimming and fishing.
51

Same time of day: The same two-hour time window for pre- and post-treatment monitoring on 

any given day (applies to pH and dissolved oxygen monitoring).

Selective herbicide: An herbicide that kills specific undesirable plants, sparing other desirable 

plants; selectivity occurs through different types of toxic action or by the manner in which the 

material is used (its formulation, dosage, timing, placement, etc.).

Sensitive, threatened, or endangered plants:

Sensitive: Any taxon that is vulnerable or declining and could become endangered or 

threatened in the state without active management or removal of threats. 

Threatened: Any taxon likely to become endangered in Washington within the foreseeable 

future if factors contributing to its population decline or habitat degradation or loss continue.

Endangered: Any taxon in danger of becoming extinct or extirpated from Washington within 

the foreseeable future if factors contributing to its decline continue. Populations of these 

taxa are at critically low levels or their habitats have been degraded or depleted to a 

significant degree.

Shading products: These compounds are usually non-toxic and designed to reduce the amount of 

light penetrating the surface of a water body, thereby reducing plant and algae growth. 

Shall: Is required.

Shoreline: The area where water and land meet.

Shoreline Emergent Vegetation: These plants grow along the edges of lakes, ponds, rivers, and 

streams. They have at least part of their stems, leaves, and flowers emerging above the water 

surface and are rooted in the sediment (cattails, yellow flag iris, purple loosestrife are all 

examples). 

Sponsor: The private or public entity with a vested interest in the treatment of a water body.

Submersed: Plants growing or generally remaining under the water.

Surface waters of the state: Lakes, rivers, ponds, streams, inland waters, salt waters, and all other 

surface waters and water courses within the jurisdiction of the state of Washington. 

Swimming advisory: An advisory required to be posted on all public signs advising people not to

swim in the treated area for “x” number of hours after the treatment occurs.

Swimming restriction: A restriction required to be posted on all public signs stating that no 

swimming shall take place in the treatment area for “x” number of hours after a pesticide 

application occurs. 
52

Threatened and endangered aquatic species: 

Threatened: An animal species likely to become endangered within the foreseeable future 

throughout all or a significant portion of its range. http://www.fws.gov/endangered/, 

http://www.noaa.gov/fisheries.html 

Endangered: An animal species in danger of extinction throughout all or a significant 

portion of its range. http://www.fws.gov/endangered/, http://www.noaa.gov/fisheries.html 

Treatment area: The area where pesticide is applied and the concentration of the pesticide is 

adequate to cause the intended effect on aquatic plants or algae. 

Upland farm pond: Private farm ponds created from upland sites that did not incorporate natural 

water bodies (WAC 173-201A-260(3)(f)).

Wetland: Any area inundated with water sometime during the growing season, and identified as a 

wetland by a local, state, or federal agency.

Wetland biologist: A biologist who specializes in the study and identification of wetland plant 

species, and has no personal or private investment in the outcome of the survey performed.
53

APPENDIX B – PUBLIC NOTICE

The public notice must be published at least once each week for two consecutive weeks, in a 

single newspaper of general circulation in the county in which the chemical treatment is to take 

place. 

Note: Submit the NOI and public notice to Ecology before the date of the first public notice.

Public Notice Template

________________________ (Applicator or Government entity) (Phone 

number)_______________ is seeking coverage under the NPDES Waste Discharge General 

Permit for aquatic plant and algae management.

(Lake Name)___________ (Acres) __________ Applicant______________ Location _______

(Lake Name)________may be treated to control aquatic weeds and algae growth between (date) 

___________through (date) _________. The chemicals planned for use are: ________, 

_______________, ______________, ______________, .... . The total treatment area will not 

exceed ____acres. 

The following information shall be included in the legal notice. 

Any person desiring to present their views to the Department of Ecology regarding this 

application shall do so in writing within 30 days of the last date of publication of this notice. 

Comments can also be submitted on the SEPA documents for this project. Submit comments to: 

Department of Ecology, P.O. Box 47696, Olympia, WA 98504-7696, Attn: Water Quality 

Program, Aquatic Pesticide Permit Coordinator. 

Any water use restrictions and or advisories will be posted near the treatment areas along the 

private shoreline and public access points. Copies of the application are available by calling the 

Water Quality Program, Aquatic Pesticide Permit Coordinator at _________________.
54

APPENDIX C – GROUND WATER MONITORING PROTOCOL

Ground water monitoring protocol for in-lake applications of triclopyr

NOTE: This protocol shall be used if a permittee is applying triclopyr for the third time in a three 

year period (for submersed or floating-leaved plant eradication or control). 

3 – 6 months prior to planned treatment

1. Identify all relevant wells within the county inventory within 1⁄4 mile of the treatment area.

2. Choose at least one non-artesian well within 1⁄4 mile of the treatment area to be the monitored

well. 

3. The well should be located within the hydrological path of the water body to be treated (for 

example, if the hydrology shows that any groundwater in an area is moving southwest, 

choose a well within 1⁄4 mile southwest of your treatment area.

4. The well chosen should be no more than 50 feet deep (if no wells are available at this depth, 

no sampling is required).

5. Contract with a lab accredited through the Department of Ecology for triclopyr and TCP 

(triclopyr’s breakdown product).

1 – 2 weeks prior to treatment

Follow laboratory protocols when taking a baseline water sample to be analyzed for triclopyr and 

TCP.

1 month after treatment

Follow laboratory protocols when taking a post-treatment water sample to be analyzed for 

triclopyr and TCP.

Prior to November 30th of the treatment year, report sampling results to Ecology as part of the 

annual report described in Special Condition S9.
55

APPENDIX D – ECOLOGY NOTIFICATION TEMPLATE

DEPARTMENT OF ECOLOGY

Aquatic Treatment Email Form

Email to: ______________________

From: Company: _________________

Cell Phone No: ______________

Pre-Treatment Notification

Week of Treatment: ___________________________

Water body 

name

County Location where 

treatment will 

begin

Chemicals/products 

proposed for use

Targeted 

plants & algae

Proposed date 

& treatment start 

time

Additional Information: _________________________________________________________________________________
56

Post-Treatment Notification

Week of Treatment: ___________________________

Water body 

name

County Chemicals/produ

cts used

Targeted 

plants & 

algae

Acres 

treated

Amount of 

product applied 

(lbs. or gallons)

Date 

treatment 

occurred

Additional Information: _________________________________________________________________________________

Knowingly submitting false information shall result in permit termination. 
57

APPENDIX E – BUSINESS AND RESIDENTIAL NOTICE TEMPLATE

Herbicide Treatment

Business and Residential Notice

Distribution Date: ____________________

___________________________ will be treated with the aquatic 

herbicide(s)/algaecide(s) on/or between ________________________.

Product(s) planned for use: __________________________________

Active ingredient(s): _________________________________________

Location of Treatment(s): 

__________________________________________________

Treated and potentially affected areas will be sign posted the day of application. 

The signs will describe any water use restrictions or advisories.

If you are withdrawing water for potable or domestic water use, livestock watering, 

or irrigation, and have no alternate water source, please contact the applicator 

(name)_____________________________ at ( ) ________________or (email) _________________________ to arrange an alternate water supply.

If you would like to request additional notification prior to treatment, or have 

further questions, please contact me using the information above.

This herbicide treatment is regulated under a permit issued by the Washington 

State Department of Ecology. 
58

APPENDIX F – POSTING TEMPLATES
59

CAUTION

The aquatic herbicide 2, 4-D (2, 4-

Dichlorophenoxyacetic acid, dimethylamine salt) will

be applied under permit to these waters on 

_______________ to control aquatic vegetation.

It is advised that no swimming occur within the 

treated area during or for 24 hours following 

treatment.

Applicator to put additional label restrictions or advisories here:

Potable Water Restrictions: 

Irrigation Restrictions: 

Fishing Restrictions:

Stock Watering Restrictions: 

For more information contact the applicator: _____________

Phone number: (___)_________________

Or the Department of Ecology at (___)_____________

THIS SIGN SHALL REMAIN IN PLACE UNTIL 2 DAYS 

AFTER APPLICATION.
60

WARNING

The aquatic herbicide 2,4-D (2,4 

Dichlorophenoxyacetic acid, butoxyethyl ester) will 

be applied under permit to these waters on 

_______________ to control aquatic vegetation.

Use Restrictions: No swimming in the treatment area 

during and for 24-hours following treatment.

Applicator to put additional label restrictions or advisories here:

Potable Water Restrictions: 

Irrigation Restrictions: 

Fishing Restrictions:

Stock Watering Restrictions: 

For more information contact the applicator: ______________

Phone number: (___) _____________

Or the Department of Ecology at (___) ______________

This Sign Shall Remain In Place Until 2 Days After 

Treatment.
61

CAUTION

Barley straw will be placed under permit in these waters 

on ___________ to control algae.

There are no swimming or recreation restrictions or 

advisories when using this product.

For more information contact the applicator: 

______________

Phone number: (___) __________

Or the Department of Ecology at (___) __________

THIS SIGN SHALL REMAIN IN PLACE UNTIL 30

DAYS AFTER APPLICATION.
62

CAUTION

The biological water clarifier ____________________ 

will be applied under permit to these waters on 

___________.

There are no swimming or recreation restrictions or 

advisories when using this product.

For more information contact the applicator: 

______________

Phone number: (___) __________

Or the Department of Ecology at (___) __________

THIS SIGN SHALL REMAIN IN PLACE UNTIL 2 DAYS 

AFTER APPLICATION.
63

CAUTION

Diquat (Dibromide of 6, 7-dihydrodipyride (1,2-

a:2',1"-c) pyrazinediium) will be applied under permit 

to these waters on _______________ to control 

aquatic vegetation.

Use advisories: It has been advised that no swimming 

occur within the treated area during or for 24 hours 

following treatment.

Applicator to put additional label restrictions or advisories here:

Potable Water Restrictions: 

Irrigation Restrictions: 

Fishing Restrictions:

Stock Watering Restrictions: 

For more information contact the applicator: _______________

Phone number: (___) __________

Or the Department of Ecology at (___) __________

THIS SIGN SHALL REMAIN IN PLACE UNTIL 2 DAYS 

AFTER APPLICATION
64

CAUTION

Endothall (AquatholTM) (Dipotassium salt of 7-

oxabicyclo[2.2.1]heptane-2,3-dicaboxylic acid) will be 

applied under permit to these waters on 

______________ to control aquatic vegetation.

Use advisories: It has been advised that no swimming 

occur within the treated area during or for 24 hours 

following treatment.

Applicator to put additional label restrictions or advisories here:

Potable Water Restrictions: 

Irrigation Restrictions: 

Fishing Restrictions:

Stock Watering Restrictions: 

For more information contact the applicator: ______________

Phone number: (___)___________

Or the Department of Ecology at (___) __________

THIS SIGN SHALL REMAIN IN PLACE UNTIL 2 DAYS 

AFTER APPLICATION.
65

WARNING

Endothall (Hydrothol 191TM) (mono(N,Ndimethylalkyalmine) salt of 7-oxabicyclo[2.2.1]heptane2,3-dicarboxylic acid) will be applied under permit to 

these waters on _____________to control algae.

Use Restrictions: No contact recreation (wading, 

swimming, waterskiing, etc.) in the treatment area 

during and for 24-hours following treatment.

Applicator to put additional label restrictions or advisories here:

Potable Water Restrictions: 

Irrigation Restrictions: 

Fishing Restrictions:

Stock Watering Restrictions: 

For more information contact the applicator:______________

Phone number: (___)___________

Or the Department of Ecology at (___) __________

THIS SIGN SHALL REMAIN IN PLACE UNTIL 2 DAYS 

AFTER APPLICATION.
66

CAUTION

Fluridone (1-methyl-3-phenyl-5-[3-(trifluoromethyl) 

phenyl]-4(1H)- pyridinone) will be applied under 

permit to these waters on ____________ to 

control aquatic vegetation.

There are no swimming or recreation restrictions or 

advisories when using this product.

Applicator to put additional label restrictions or advisories here:

Potable Water Restrictions: 

Irrigation Restrictions: 

Fishing Restrictions:

Stock Watering Restrictions: 

For more information contact the applicator: ______________

Phone number: (___)__________

Or the Department of Ecology at (___) __________

THIS SIGN SHALL REMAIN IN PLACE UNTIL 2 DAYS 

AFTER APPLICATION
67

CAUTION

Glyphosate (N-(phosphonomethyl) glycine, 

isopropylamine salt) will be applied under permit to these 

waters on ___________ to control aquatic vegetation.

There are no swimming or recreation restrictions or 

advisories when using this product.

Applicator to put additional label restrictions or advisories here:

Potable Water Restrictions: 

Irrigation Restrictions: 

Fishing Restrictions:

Stock Watering Restrictions: 

For more information contact the applicator: ______________

Phone number: (___) __________

Or the Department of Ecology at (___) __________

THIS SIGN SHALL REMAIN IN PLACE UNTIL 2 DAYS 

AFTER APPLICATION.
68

CAUTION

Imazapyr (2-(4,5-dihydro-4-methyl-4-(1-methyleth7yl)-5-

oxo-1H-imidazol-2-y1)-3-pyridinecarboxylic acid) will be 

applied under permit to these waters on ___________ to 

control aquatic vegetation.

There are no swimming or recreation restrictions or 

advisories when using this product.

Applicator to put additional label restrictions or advisories here:

Potable Water Restrictions: 

Irrigation Restrictions: 

Fishing Restrictions:

Stock Watering Restrictions: 

For more information contact the applicator: ______________

Phone number: (___) __________

Or the Department of Ecology at (___) __________

THIS SIGN SHALL REMAIN IN PLACE UNTIL 2 DAYS 

AFTER APPLICATION.
69

CAUTION

The shading product ___________________ will be 

applied under permit to these waters on ___________ to 

control aquatic vegetation and/or algae.

There are no swimming or recreation restrictions or 

advisories when using this product.

Applicator to put additional label restrictions or advisories here:

Potable Water Restrictions: 

Irrigation Restrictions: 

Fishing Restrictions:

Stock Watering Restrictions: 

For more information contact the applicator: ______________

Phone number: (___) __________

Or the Department of Ecology at (___) __________

THIS SIGN SHALL REMAIN IN PLACE UNTIL 2 DAYS 

AFTER APPLICATION.
70

CAUTION

Sodium carbonate peroxyhydrate will be applied under 

permit to these waters on ___________ to control algae.

It has been advised that no swimming occur within the 

treated area during or for 12 hours following treatment.

Applicator to put additional label restrictions or advisories here:

Potable Water Restrictions: 

Irrigation Restrictions: 

Fishing Restrictions:

Stock Watering Restrictions: 

For more information contact the applicator: ______________

Phone number: (___) __________

Or the Department of Ecology at (___) __________

THIS SIGN SHALL REMAIN IN PLACE UNTIL 2 DAYS 

AFTER APPLICATION.
71

CAUTION

Triclopyr TEA (Triethylamine salt of 3,5,6-trichloro-2-

pyridyloxyacetic acid) will be applied under permit to 

these waters on _______________ to control aquatic 

vegetation.

It has been advised that no swimming occur within the 

treated area during or for 12 hours following treatment.

Applicator to put additional label restrictions or advisories here:

Potable Water Restrictions: 

Irrigation Restrictions: 

Fishing Restrictions:

Stock Watering Restrictions: 

For more information contact the applicator: __________________

Phone number: (___) _____________

Or the Department of Ecology at (___) __________

THIS SIGN SHALL REMAIN IN PLACE UNTIL 2 DAYS 

AFTER APPLICATION.