1 

### Part 1. DESCRIPTION OF THE VECTOR CONTROL DISTRICT

Budget Fiscal Year (FY) 08/09 – $1,335,104.00 Fiscal Year (FY) 09/10 - $1,269,127.00 *
*Estimated at time of report creation. For more information see www.co.multnomah.or.us/budget



### Size of district 457 square miles – Multnomah County 3.63 square miles – City of Durham and surrounding sites

Combined size of treatment area in square miles 457 square miles (maximum) – Multnomah County 3.63 square miles (maximum) - City of Durham and surrounding sites

Training goals of each pesticide applicat or, supervisor and dates of training

# of attendees Event
1 Child abuse training – 4-22-08

5 Respiratory protection refresher – 5-22-08

9 All Staff policies revi ew and e-policies – 2-18-09

3 Multnomah County media training – 1-29-09

9 Dealing with difficult operators - Oct & Nov – 2008

2 Multnomah County Climate Change Workshop – Feb. 6 th

1 Oregon Native Turtle Conservation Forum 3/20/2009

1 Target Annual Fall Workshop, Portland – Nov. 6 th 2008

1 Oregon Vector Control Associ ation Recertification Workshop –

Nov.7 th 2008

1 6th International Integrated Pest Management Symposium 3/25/2009

1 Washington State Department of Health, Zoonotic and Vector-borne Disease Workshop 3-2008

5 Oregon State University Chemical Applicator Short Course – 1-2009

1 Mapping Oregon Communities – 8-14-2008

1 Northwest Mosquito and Vector Control Assn Conference – 10-9 and

10-10-2008

1 Society for Vector Ecology Conference – 9/28/2008 through 10/2/20082 

### Annual Report Mosquito Control (1-1-2008 through 12-31-2008)

 Control – 5690 acres

 Complaints – 0

 Inspections – 44

 Gambusia affinis distributed –1,273 individual fish

Mosquito Surveillance (1-1-2008 through 12-31-2008)

 Number of Mosquito pools submitted for testing using RT-PCR = 250

 Total number of Mosquito pools tested (various methods incl. RT-PCR{160} and RAMP{90}) = 250

 Number of Dead Birds Tested - 141

Rodent Control (1-1-2008 through 12-31-2008)

 Complaints – 1025

 Inspections – 967

Part 11. MAPPING All maps applicable to program were submitted in the 1999 and the 2000 pesticide use plans on file with both OHD and ODFW.

PART III. USE OF SURVEILLANCE TO DEFI NE THE PROBLEM AND DETERMINE PESTICIDE

CHOICE



### 1.1 Sampling pre-treatment: to det ermine if treatment is needed Routine mosquito larval surveillance is c onducted prior to an application using 400mL dippers. Mosquito larvae are initially fi eld identified and counted and samples are collected for specific identification at the Multnomah County Vector and Nuisance Control (MCVNC) lab. A threshold instigati ng a control application is exceeded when one or more mosquito larva with known pot ential vector capacity of mosquito-borne disease and or effects community livabilit y, randomly sampled, is collected. This

conservative larval threshold is based upon multiple factors including reproductive potential, host preference and avoidance, migratory potential and local population

densities.

Applications to control mosquitoes may be initiated if a mosquito larva is found. Many other factors are taken into account which may delay or prevent appli cation of larvicides to the site which include; predator/larvae population, hydrology of site, time of year, weather, species, flight range of mosqu ito, location of site, community livability, vectorial capacity of species, and arboviral disease presence.

1.2 Sampling post treatm ent after treatment Routine mosquito larval surveillance is conducted after an app lication using 400mL dippers. Post application su rveillance of larvae is comple ted to review efficacy of suppression method implemented.

1.3 To evaluate efficacy of treatment3 

### MCVNC currently conducts efficacy of suppression methods under the following

circumstances:

 When larvicide stock materials, held over from previous year(s) are applied

 When the site is yielding +20 mosquitoes /per 400mL dip prior to initial treatment to determine if population(s) are hi gh enough to justify re-application. Bacillus sphaericus (e.g. Vectolex cg) performs better when numbers are high.

 When new formulations or products of la rvicide materials are applied, on trial basis, according to label, for viability in MCVNC program. Due to the redundancy of results, MCVNC does not conduct routine efficacy checks

when known larvicide materials are used at different mosquito breeding sites, unless there are unique characteristics of the mo squito breeding site that would alter the outcomes of the material’s effect on control (i.e. B.t.i. and high organic c ontent in water).

1.4 To determine effect on non-target species MCVNC relies upon an integrated vector management plan that considers and implements multiple strategies for vector management by also balancing and considering affects on both non-targets and the local ecosy stem. The MCVNC staff are regulated by Oregon Department of Agriculture and are licen sed public applicators. The activities of MCVNC are reviewed and approved by Oregon Department of Fish and Wildlife, Oregon Department of Human Services, and Multnomah County Health Department. The MCVNC program manager routinely review s peer reviewed literature on vector and pertinent public health preventions and a pplies that science an d methodology to the vector control program. There is a plethora of peer-reviewe d literature that shows that

bacterial larvicides have no effect on non-targets other than Culicidae and some Chironomidae and Simuliidae. Additionally the carrier of the bacterium has no chemical affect on non-target organisms or the ecology of the local environment. When conducting post-application efficacy checks, st aff may also note any effects on non-target species as applicable and work with appropriate parties to investigate as necessary. MCVNC works with local wildlife managers to assure vector cont rol activities do not further impact local organisms protecte d under the Endangered Species Act of 1973, Migratory Bird Treaty Act of 1918

, 

### Bald Eagle Protection Act of 1940, United States Wildlife Service National Bald Eagle Management Guidelines May 2007, and information acquired from the Oregon and the Washington Bald Eagle Survey. Any aquatic or benthic non-targets collected during pre or post larv iciding activities or routine

larval collection are identified to minimum Order. This non target information is recorded on hardcopy and retain ed in a database which li nks the date of collection, location, and relative matching mosquito in formation and control activities for a particular location. As of 2006, MCVNC and Oregon Fish and Wildlife have developed and implemented a Mosquito Control Plan for the Sauvie Island Wildlife area to minimize impacts to non-target populations . Moreover as of 1995, MCVNC and the United States Department of Agriculture, Forest Services, Pacific Northwest Region, Columbia River Gorge National Scenic Area have developed and implemented a mosquito control plan for floodwater mosquito es as part of the Sandy River Delta Plan and associated Environmental Impact Statemen t. Additionally as opportunities arise to partner with experts, MCVNC w ould defer to local wildlife managers for their expertise for non-target species monitoring other than humans or vector populations. In 2008,4 

### Oregon Fish and Wildlife has agreed to perform some post m onitoring of wildlife population(s) on Sauvie Island after a ULV- adulticide application by MCVNC for mosquito control. The methods and materi als are yet to be determined by ODFW and

MCVNC at this time. Please see the Sensitive Areas section for more detail.

1.5 Document all sampling results for inclusion in the annual report We have a database containing species identification and numbers sampled. Additionally we record “field observations” when pe rforming vector control activities around migratory birds, particularly Bald Eagle Haliaeetus leucocephalus and Osprey Pandion

haliaetus

. 

### Any aquatic or benthic non-targets co llected during pre or post larviciding

activities or routine la rval collection are iden tified to minimum Order. This non target information is recorded on hardcopy and retain ed in a database which links the date of collection, location, and relative matching mosqu ito information and control activities for a particular location.

.1 Employ the use of landing rates, light tr aps, phone complaints (verified by trap samples). Require that complaints be made formally in writing. MCVNC does not normally use landing rates as a means of adult su rveillance as this increases the risk for acquisition of a mosqu ito-borne disease by MCVNC staff. Instead, when necessary, MCVNC will utilize a sweep net for 30 seconds in place of landing

counts

.

MCVNC occasionally uses New Jersey (light tr aps) for surveillance purposes. If average per night mosquito numbers experience a sharp rise, or are excessive in relation to nearby EVS traps then this data may be used to gui de further surveillance and/or adult mosquito

control efforts. There are other methods for mosquito collection that are used by MCVNC including gravid, modifi ed Encephalitis Virus Surveillance (EVS), Bioagents Sentinel (BGS), attractants, etc for imp roved sample collection as necessary.

MCVNC does accept phone call intake of adu lt mosquito complaints from Multnomah County residents. Complaints are taken vi a internet electronic complaints forms @ www.mchealthinspect.org or by phone at 503-988-3464. Comp laints are investigated by trained field staff employees ei ther licensed directly or wo rking under the supervision of a public pesticide license holder administered by the Oregon Department of Agriculture. This information may additionally be used to locate the larval breeding site(s) as applicable.

2.2(2.1) Sampling pre-treatmen t to determine species MCVNC regularly uses EVS traps for adult mosquito and arboviral disease surveillance throughout a large portion of the county. If it is determined that there are high numbers of known vector capable mosquitoes in a trap area then this data can be used to assist us and support the need to control mosquitoes such as adulticides. In most cases adulticiding would not occur based on the pr esence of certain mosquito species, but rather on a combination of factors including disease presence, and mosquito populations of vector capable mosquitoes. If however the presence of arboviral disease(s) existed, mosquito species data would be gather ed and used to guide any adulticiding.5 

### 2.2(2.2) Sampling pre-treatment to determine population density

MCVNC regularly uses EVS traps for adult mosquito and arboviral disease surveillance throughout a large portion of the county. If it is determined that there are high numbers of known vector capable mosquitoes in a trap area then this data would support the need to adulticide, and it would a ssist us in guiding our contro l efforts. Typically risk associated with the presence of an arboviral disease and other factors would be additional factors in deciding to treat hi gh numbers of adult mosquitoes.

2.2(2.3) Sampling pre-treatment to determine need for control Under normal situations, where there is no risk or a very low risk of human infection from mosquito-borne disease, MCVNC doe s not use adult colle ction traps for pretreatment sampling to determine need for c ontrol because adulticide applications are generally not performed. The primary goal of our EVS trapping program is to test for presence of arboviruses in lo cal mosquito population(s).

In the event, that a single mosquito pool test s positive for arbovirus in an area with other criteria such as positive bird or mos quito pool was found, known competent vector mosquito populations, and there are/are not no large die-offs of birds (specifically corvids) reported, MCVNC would use pre-tr eatment sampling to determine need for

control determine the best course of action for a temporary adultici ding program. Under an IPM program, MCVNC would apply pesticid es at appropriate times of the day when adult mosquitoes are most active with UL V output to minimize the quantity of active ingredient applied.

2.3(3.1) Sampling after treatment to evaluate efficacy MCVNC would use cage tests to evaluate efficacy of adulticides applied. A set number of cages containing a set number of wild -caught or lab-reared species-targeted mosquitoes would be placed at set intervals along the spray route to determine treatment efficacy. This would provide the most accu rate reading of our application efficacy without contamination from newly hatched or migrating mosquitoes. Initially however, post-treatment adult trapping would likely be done as an additional gauge of our success. This will usually be done with EVS traps, bu t also supplemented in certain areas where applicable by a permanent NJ lig ht trap if already in place.

2.3(3.2) Sampling after trea tment to detect possible pesticide resistance Currently, MCVNC plans on cond ucting resistance tests, res ource dependent, using bottle bioassays on wild caught mosquitoes from the areas where we adulticide. This will provide a method to check for pesticide re sistance in our local mosquito species populations.

2.3(3.3) Sampling after treatment to determine in-migration As described earlier, there will be some post-treatment trapping to determine the remnant mosquito population. Depending on the dynamics of the area, an increase in the number of traps and/or the duration in which the traps are set is likely. Such areas could include, but are not limited to those along the Columb ia River—Sauvie Island, Kelly Point, and the Gorge. These are areas wh ere traps in previous years ha ve pointed to large influxes6 

### of mosquitoes “blowing” in or migrating in fr om outside the area, particularly from Clark County.

2.3(3.4) Sampling after treatment to determine if any effect on non-target species Adulticides, by chemical nature, are a broad spectrum product. Under an IPM program, MCVNC would apply adulticides when adult mosquitoes are most active (e.g. ULV and barrier applications) to minimize the quantit y of active ingredient applied and minimize the risk to non-target species. Additionally as opportunities arise to partner with experts, MCVNC would defer to local wildlife managers for their expertise for non-target species monitoring other than humans or vector popu lations. In 2008, Oregon Fish and Wildlife has agreed to perform some post monitoring of wildlife population( s) on Sauvie Island after a ULV-adulticide applica tion by MCVNC for mosquito control. The methods and materials are yet to be determined by ODF W and MCVNC at this time but will include monitoring of other pest or mo squito control activities adjacent to the mosquito control activities of Multnomah County where there may be an overlapping effect on non-targets.

2.4 Document all sampling results for inclusion in the annual reports MCVNC actively used EVS traps for adult mosquito collection and includes this data in year-end reports when requested.

3 Choice of pesticides. Use the above information to explain your choices of pesticides.

Larvicide Rationale MCVNC primarily uses larval sampling results to determine the pesticide selection before application. Biorationa ls are not effective on late 4 th 

### instars and pupae and are not used as a control product in areas where thos e life stages are pres ent. Instead, MCVNC will use alternate products such as oils a nd films (e.g. GBO) on those sites with those specific life stages present. MCVNC is aware that Bacillus sphaericus is inefficient at killing Anopheles spp. and would instead opt to use a B.t.i. product as a suppression tool. In situations where an MCVNC staff person is justified in applyi ng control products for mosquito suppression and the mosquito breeding site mosquito population has metamorphosed beyond the effectiveness of biorationals, MCVNC may choose to use other larvicides such as GBO, MMF, or Abate, situationally dependent such as late instar; non-feeding stage, shorter residua l life, polluted waters, and a pplications of larvicide due to low temperature when other bacterium bi orationals are ineffective. For more

information on Bacillus thuringiensis var. israelensis or B. sphaericus see Attachment 1

and 2.

Adulticide Rationale In the event of a health emergency due to th e detection of an arbovi rus found present in a vector population in Multnomah County and specific criteria is met, MCVNC would initiate a local adulticiding program. Under an IPM program, MCVNC would apply pesticides at appropriate times of the day when adult mosquitoes are most active with ULV output to minimize the quantity of ac tive ingredient applied. MCVNC may use barrier sprays for work in areas with elevated public exposure. MCVNC may use synthetic pyrethroid for app lication, as described upon label, to residences, agricultural areas, etc. MCVNC may use synthetic py rethroids for application by ULV by ground7 

### including areas such as green spaces. With appropriate resources and infrastructure, MCVNC anticipates monitoring resistance long term of chem ical application(s) of adulticides in mosquito populations. Additiona lly as opportunities arise to partner with experts, MCVNC would defer to local wildlife managers for their expertise for non-target species monitoring other than humans or v ector populations. In 2008, Oregon Fish and Wildlife has agreed to perform some post m onitoring of wildlife population(s) on Sauvie

Island after a ULV-adulticide application by MCVNC for mosquito control. The methods and materials are yet to be dete rmined by ODFW and MCVNC at this time but will include monitoring of other pest or mo squito control activities adjacent to the mosquito control activities of Multnomah County where there may be an overlapping effect on non-targets. Please see the Sensitive Area section for more detail.

Mosquito Source Reduction Rationale This section is not required in this report but MCVNC believes that it is a critical component of an integrated vector management plan. Source reduction is a term used to describe a variety of prevention-based ac tivities that reduce or limit the population increase of vectors. Some examples of this may be vegetation management, water management, hydrology management, sa nitation management, food storage manipulation, waste tire collecti on and disposal, etc. When appropriate after consultation with land manager(s) and or owner, MCVNC may remove a select beaver dam to discourage stagnant water at the discretion, permission or di rection of the land manager and or owner, particularly when the beaver dam, silt or other riparian vegetation impedes managed wetlands or water control structures.

Part IV. PEST CONTROL AND MANAGEMENT

1.1 Larval control - Physical eliminatio n through mechanical modification of problem areas. MCVNC, under an IPM, makes recommendations and performs abatement with local, state and federal agencies and property owners of Multnomah County to alter, reduce, or limit practices such as vegetation, water and an imal management that create or maintain mosquito breeding habitat

.



### 1.2 Biological agents MCVNC uses biological control agents as one control tool in an IP M. Biological control agents are effective on the immature stages of Culicidae.

1.2(2.1) Gambusia affinis MCVNC stocks mosquito fish, Gambusia affinis , by permit of Oregon Fish and Wildlife, in storm-water detention ponds (SDF) ponds, sw ales and other closed water systems not fed or drained by natural waterways incl uding creeks, streams, and sloughs after assessment of potential releas e from stocked pond, potential for fish survival and reproduction, and risk to native fish, if app licable. In addition, mosquito fish are available, by permit of Oregon Fish and W ildlife to Multnomah County residents to be used in permanent backyard ponds not fed or drained by natural waterways including8 

### creeks, streams, and sloughs. Mosquito fish are not distributed by MCVNC. Multnomah County will no longer collect fish from various “natural” locations throughout Multnomah County for distribution into pe rmitted storm-water detention ponds (SDF) ponds, swales and other closed water system s not fed or drained by natural waterways including creeks, streams, and sloughs due to increase concerns over fish pathogens including infectious hematopoietic necrosis di sease. Instead fish will be collected from Multnomah County managed breeding ponds or purchased from an approve Oregon Department of Fish and Wildlife Fish Hatc hery and transported using a current Oregon Department of Fish and Wildlife (ODFW) “Permit to Transport Live Fish or Eggs” permit. ODFW and Oregon vector control di stricts and local health departments are expected to update the ODFW “Backgr ounder” on mosquito fish in 2008.

1.2(2.2) Bacillus thuringiensis var. israelensis (Bti) MCVNC uses the biorational control agent B ti for suppression of immature mosquitoes in their first through third instar larval life stages. Some fo rmulations of Bti, such as Vectobac G, are preferred b ecause it targets a wide range of mosquito species ( Cq perturbans is an exception). For more information on Bacillus thuringiensis var. israelensis or B. sphaericus see Attachment 1 and 2.

1.2(2.2) Bacillus sphaericus (Bs) MCVNC uses the biorational control agent Bs for suppression of immature mosquitoes in their first through third instar larval life stages. This ma terial is used throughout the county and is the primary control agent for the Culex spp. This material is ineffective at controlling Anopheles spp. For more information on Bacillus thuringiensis var. israelensis or B. sphaericus see Attachment 1 and 2.

1.2(2.3) Methoprene (insect growth regulators) MCVNC uses the biorational Methoprene in spec ific sites such as ca tch basins, roadside ditches and small ponds. If surveillance resu lts yielded mosquitoes with oxidase-based resistance, MCVNC would limit continued us e of Methoprene to avoid resistance. However, there has been no evidence of resist ance in our pre- and post-treatment larval sampling. This active ingredient is found in various formulations.

1.3(3.1) Golden Bear Oil (GBO) MCVNC uses surface film products as a last resort due to the broad spectrum of organisms that potentially can be affected. GBO is used in areas where control efforts have begun to late to effectively apply bacteria l larvicides for immature mosquito control.

1.3(3.3) Other products – Vapona Strip MCVNC anticipates using Vapona Strips to assist with the curation of entomological and vertebrate taxidermy samples in museum curation.

Other chemicals – see past list submitted

2 Adult Control9 

### VECTOR AND NUISANCE CONTROL – ADMINISTRATIVE GUIDELINES

SUBJECT: FIELD POLICIES AND PROCEDURES NUMBER: 1115(1)

TITLE: APPLICATION OF ADULTICI DES ABSENCE OF WEST NILE VIRUS



### EFFECTIVE: 01/08/02 LAST REVIEWED DATE: 09/09/05

APPROVED: Christopher M. Wirth PAGE: 1 OF 3

POLICY STATEMENT Mosquito Control in the Absence of WNv (for example):

 Local mosquito species that ar e not vectors of human disease

 Exotic mosquito species with unknown vector competence

 Local mosquito species with suspecte d but unknown vector competence for WNV

 Local mosquito species with vector competence for endemic mosquito-borne disease (i.e. WEE, SLE, and malaria)

PROCEDURE Prior to any program changes made as a re sult of the IPM Adviso ry Group, mosquito

control in the absence of WNv on private and public lands will operate as follows: (NOTE: All MCVNC private or public land applications include efficacy evaluation)

 Complaint-driven system for Private Land (~60% of historical adulticide use, primarily barrier application), in which MCVNC will:

o respond to mosquito complaints

o offer advice to mitigate mosquito problems

o recommend effective non- adulticide alternatives

o present adulticide use as an option when other effective control measures are not available; options counseling; MCVNC will not recommend

adulticides.

o apply adulticides at the landowner’s request only when MCVNC judges application to be appropriate and lik ely to be effective (e.g. when adult traps exceed 100 or more mosquitoes in an 8 hour period) (Note: When there is WNv in the community, ac tions will be guided by WNv Policy)

o not use aerial application of adulticides

o maintain current program scope

 Complaint-driven system for Public Lands

o MCVNC will respond to complaints and offer routine control and surveillance as specified by any existing contracts

o MCVNC will offer comprehensive recommendations to mitigate mosquitoes (as for private lands)10 

### o MCVNC will present adulti cide use as an option when other effective control measures are not available; MCVNC will not recommend

adulticides.

o Any application of adulticide will be at the total discretion of the land

steward when there is no WNv in the co mmunity (Note: When there is WNV in the community, actions will be guided by WNv Policy)

o MCVNC will not use aerial a pplication of adulticides

 Contracts for public lands (Note: No cont racts exist or woul d be entered into between MCVNC and private land owners.)

o Note: This issue area requires further discussion/development. All public land contracts are subject to the pa rameters set forth above in the complain-driven public lands section (i .e. range of control options without specific recommendations to use adul ticides). Contracts do not include acreage amounts for adulticides. A ll work is based on the mosquito ecology and population dynamics of a given season, and again, is subject to the total discretion of the land steward

.

o Recommendations on contracts from the Spring 2004 WNv Task Force Small Group were:

 No new contracts that include possible use of adulticides for

nuisance control

 No expansion of acreage that include possible use of adulticides for nuisance control in existing contracts

 No new areas of adulticide use within lands covered by existing contracts – i.e., no “swapping” of old lands where adulticide was

allowed for new lands where adulti cide was not previously used

ADDITIONAL CONSIDERATIONS For application of adulticides should include, at a minimum the following;

 Best adulticide active ingredient choice and other label requirements

 Best application of adulticide in cluding timing of application and equipment used to apply product.

 General ecology of the area such as ke y habitat types and the presence of natural barriers (i.e. large rivers)

 Flight or migrational range of the af fected/infected hosts (birds, mammals, etc)

 Flight range of vectors known or believ ed to be of importance in the area

 Population density and age proportion of parous females, those females with ability to produce offspring, potential.

 Human population at risk in relationship to locality (i.e. urban vs. rural)

 Human population at risk and the perception of the relative risk of use of

adulticides for control

 Human population at risk and the ag e demographics within the locality

 Evidence of persistent transmission activity detected by the surveillance

program

 Season of the year and its relationship to the vector11 

###  Other relative surveillance data sp ecific to mosquito-borne disease of

concern

VECTOR AND NUISANCE CONTROL – ADMINISTRATIVE GUIDELINES

SUBJECT: FIELD POLICIES AND PROCEDURES NUMBER: 1126(1)

TITLE: WEST NILE VIRUS RESPONSE PLAN FOR 2006-07 MOSQUITO SEASON



### EFFECTIVE: 03/01/07 LAST REVIEWED DATE: 02 13 07

APPROVED: Gary Oxman PAGE: 1 OF 17

OVERVIEW Includes the following components of the Multnomah County Health Department, 2007 Mosquito Season West Nile Virus Response Plan;

 PLAN INTRODUCTION – Introduction/Purpose

 PRINCIPLES

 SUMMARY

 RISK ASSESSMENT TOOL

 RESPONSE GUIDELINES

 GLOSSARY

PLAN INTRODUCTION - Introduction/Purpose

This West Nile Virus Response Plan describes how Multnomah County Health Department will manage the problem of West Nile Virus (WNV) during 2007. The Plan consists of four parts:

 Plan Introduction – This gives background on how the plan was developed and the thinking behind the plan.

 Plan Summary – This gives a brief overview of the main features of the plan and how it will work.

 Response Guidelines – This describes how the Health Department will respond to various degrees of the threat posed by West Nile Virus.

 Human Health Risk Assessment Tool – This describes the methods the Health Department will use to assess the risk to human health posed by WNV as circumstances change through the mosquito season.

Although the number of people in Multnomah County likely to suffer serious illness from this mosquitoborne disease is small, the Health Department is committed to minimizing the risks and impacts of WNV. It will do this through a comprehensive prevention-based plan that emphasizes public education and control of mosquitoes before they are able to fly and spread WNV.

This Plan was developed during the Spring of 2004 with the assistance of the Health Department’s WNV Task Force made up of stakeholders with a wide range of knowledge, interests and values.

The primary purpose of this West Nile Virus Response Plan is to provide guidance to decision makers in Multnomah County Health Department. Staff at all levels will use this Plan as they anticipate and respond to the potential human health impacts of West Nile Virus (WNV) in Multnomah County in 2007.

This Plan was developed before the arrival of WNV in Multnomah County. It is based on “best practices” for managing the human health impacts of WNV developed by the Centers for Disease Control and12 Prevention (CDC) and selected state and local health de partments across the country. It is a “mainstream” plan; it is consistent with CDC’s recommendations, and is similar to the plans of many communities across

the US. Because the Plan was developed before WNV arrived in our community, it does not benefit from local experience in managing WNV.

The Health Department intends to follow this Plan closely in managing the im pacts of WNV in Multnomah County. The Department recognizes its responsibility to use professional judgment in applying this Plan to deal with specific WNV-related situations that threaten the public’s health.



### PRINCIPLES

This West Nile Virus Response Plan is based in the best available science and also embodies several important principles and beliefs:

 The human health impacts of WNV can be reduced but not entirely avoided. Thus, the goal of the

Plan is to ensure that the Health Department and our community takes appropriate and reasonable actions to reduce the impacts of WNV.

 WNV infection and disease is likely to be with us fo r the foreseeable future. Therefore, prevention and response activities must be effective, and enviro nmentally and economically sustainable over a long period of time.

 WNV is carried to humans as part of a larger cy cle of infection that primarily involves birds and mosquitoes. To be effective, WNV prevention an d control activities must decrease the potential for infected flying adult mosquitoes to bite people. This is best accomplished by consistently applying long-term preventive actions that reduce populations of mosquitoes that can transmit WNV, and that engage the public in reducing mosquito breeding habitat and in protecting themselves.

 Multnomah County Health Department utilizes Integrated Pest Management (IPM) as its approach to controlling mosquito populations. IPM is an integrated strategy that uses multiple methods to achieve long-term control of mosquito populations, and has been proven to be the most effective approach. In using IPM to address WNV, the Department will targ et its mosquito control activities at specific areas and situations that clearly contribute to the risk of transmitting WNV.

 Some actions to reduce WNV infection in people can have unintended negative consequences on people and the environment. Thus, reducing WNV impacts involves balancing the risks and benefits of these control activities with their potential negative consequences.

 Multnomah County Health Department is committed to using the least harmful interventions that are likely to be effective in a given situation. The Department is also committed to choosing and targeting its interventions based on reliable scientific information to the maximum extent that is practical.



### SUMMARY
This section is a summary of Multnomah County Health Department’s West Nile Virus Response Plan for the 2007 mosquito seas on. The original Plan was based on recommendations made by the Department’s West Nile Virus Task Force in 2004. The 2007 pl an was made available to the Vector and Nuisance Advisory Committee on March 20, 2007. The Department is committed to evaluating the effectiveness of

this Plan at the end of each mosquito season, and will revise the Plan as necessary. While the number of people likely to suffer serious illn ess from this mosquito-borne disease is small, the Health Department is committed to minimizing the risks of WNV and its serious impacts (brain/nervous system infection).

The Plan is based on the risk of human West Nile virus disease as periodically assessed by the West Nile

Virus Human Health Risk Assessment Tool included in this Plan . The Tool defines four risk levels representing a range from no risk to high risk of acq uiring infection locally. To ensure that decision-13 making about intervention is appropriate to the situation at a given point in time, the risk level is reset to Level A (no local risk) a t the end of each adult mosquito season (typically November 1 st) . Level A will apply until there is evidence of WNV activity in the greater Portland metropo litan area that justifies a change in risk level.

This Multnomah County Health Department West Nile Virus Response Plan focuses on reducing the potential human health impacts of WNV. At the same time, Health Department will continue to respond to residents’ concerns related to nuisance mosquitoes. However, when WNV is detected in the greater Portland metropolitan area priority will be given to area wide diseas e prevention rather than nuisance

control.

The Department’s typical response to nuisance mosquito es will be based on an inspection of property to determine mosquito activity. Response activities may include small group and public education utilizing direct contact, printed materials, and other methods as appropriate. Use of chemical adulticides to control adult nuisance mosquitoes will be done only with the permission of the property owner, using application methods that minimize spread of these materials off the property.

This plan has supporting documents that explain how activities described in the Plan will be carried out. Additional supporting documents and plans will be deve loped as needed each mosq uito season. These will explain activities included in the County’s comprehensive approach to vector control.

Two elements make up the heart of the plan. They are used together to classify and respond to the risk of

human infection with WNV as the s ituation changes over the season.

 West Nile Virus Human Health Risk Assessment Tool

 West Nile Virus Response Guidelines

West Nile Virus Human Hea lth Risk Assessment Tool

The Assessment Tool was adapted from a model used by the state of California. The Tool considers eight

different factors that reflect the risk of people in our community getting West Nile Virus infection. Each factor is given a score from 1 to 5. The scores fo r individual factors are averaged to give an overall measure of the risk of people becoming infected with West Nile Virus. The Assessment Tool uses two
scales: 1) A Seasonal Human Health Risk Scal e to represent risk over the cour se of 2007 season. This scale provides information to guide surveillance, public education, and control activities other than spraying intended to reduce adult mosquito populations. 2) A Short Term Human Health Risk Scale to reflect human health risk in th e short-run (i.e., over a period of days or a few weeks). This will be used to guide short-term response activities, including the possibility of spraying intended to reduce adult mosquito populations. The scores of the two scales are “semi-quantitative.” La rger numbers mean that there is more risk, but (for example) a value of 4 cannot be interpreted as being twice as risky as a value of 2. The table below shows the relationship between response scores and response levels.

Level Description Seasonal Risk

Score Short Term

Risk Score Level A No WNv In Community 1.0 – 2.5 Level B WNv in community, Low Human Health Risk 2.6 – 4.5 Level C Human Health Risk in Localized Area(s) 4.6 – 4.7 Level D Human Health Risk in Multiple Areas or Throughout the County 4.8 or higher

West Nile Virus Response Guidelines

The West Nile Virus Response Guidelines use four risk levels based on the results of the Assessment Tool at a given time. The levels (A-D) represent increasing hum an health risk from WNV. The risk levels are14 defined by Assessment Tool scores, and presence (or absence) of W NV in the County. Each level includes specific response actions that the Health Department can take. Each level builds on the activities of the previous level(s).

The Response Guidelines utilize a comprehensive prevention-oriented approach. This approach emphasizes public education and control of mosquitoes before they are able to fly and spread WNV. Use of Ultra Low Volume (ULV) chemical insecticides to reduce adult mosquitoes populations is reserved for special high-risk situations.

Level A: No WNv in the Community The response in Level A establishes basic monitoring, public education and mosquito control activities. It emphasizes targeted, user-friendly pub lic education that is culturally appropriate and does not invoke fear. It realistically describes the risk of getting WNV, how it is spread, what members of the public can do to reduce their own risk, and what they can do to help mosquito control efforts. Level A also features extensive monitoring to detect the arrival of WNV, and decrease the potential for its spread in coming months. This is done by reducing mosquito habitat, and applying biologic materials to prevent immature mosquitoes from hatching and becoming flying adults. In Level A, there can also be attempts to create assistance for low-income high-risk individuals and co mmunities to decrease their WNV risk. Approaches could include promoting community clean-ups, and finding subsidies for window screens and other simple preventive steps.

Level B: WNv in the Community, Low Human Health Risk The response in Level B maintains most of the preven tion and control activities in Level A. It increases public education though outreach and use of the mass media. Messages emphasize personal protection steps, and updates on the current risk situation. At Level B, there are incr eased efforts to reduce the sources of mosquitoes, and reduce immature mosquito populations. The Health Department will also start to actively look for infection in people.

Level C: Human Health Risk in Localized Area(s) In the response to Level C, public education is inte nsified and further focused on communities at increased risk of WNV exposure (for example, communities near sites where there are la rge numbers of infected mosquitoes). At Level C, the Health Department may choose to spray ULV insecticides to reduce adult mosquito populations. This would be done only when the Department has good reason to judge that spraying is likely to be effective in reducing the risk of WNv infection in humans in a given situation. In addition, the Health Department would have to address an extensive list of factors to ensure that spraying could be done in a way that is as safe as possible for people and the environment. ULV applications will only be done in a defined area that is targeted at controlling adult populations of a WNv carrying mosquito. No aerial applications of adulticides will be done. Only the County Health Officer will have the authority to approve ULV spraying for control of WNV.

Level D: Human Health Risk in Multiple Areas or Throughout the County At Level D, the Response Guidelines call for a shift to wards further public educatio n about self-protection. There would also be an emphasis on communications to keep the risk of WNV in context, and reduce unreasonable fears. Monitoring activities would be re -focused to track harmful mosquito populations, and

assure that human cases are identified. Use of adultic ides would likely be reduced for two reasons: 1) The development of widespread infection in the face of adulticide use suggests that further adulticide use would not be effective. 2) County resources could be better applied to promoting effective personal protection in the short-term. It is also possible that the Department would act to cancel outdoor activities that present an unreasonable risk of WNv transmission.15WEST NILE VIRUS HUMAN HEALTH RISK ASSESSMENT TOOLMultnomah County Health DepartmentWest Nile Virus (WNv) Response Plan2007 Mosquito SeasonWNv Surveillance FactorValueBenchmarkSeasonalRisk ScoreShortTerm RiskScore1.Environmental ConditionsEnvironmental conditions that favor WNvtransmission in Oregon are unknown. Based onfindings elsewhere, high temperatures are associatedwith increased risk.12345Temperature well below averageTemperature below averageTemperature averageTemperature above averageTemperature well above average2.Abundance* of adult mosquito species with knownability to increase WNv infection in birds(amplification vectors) or transmit WNv to humans(bridge vectors)(examples: Aedes vexans,Coquillettidia perturbans, Culex pipiens, Culex tarsalis,Culex territans, Culiseta inornata)* Relative to previously documented levels12345Vector abundance well below averageVector abundance below averageVector abundance averageVector abundance above averageVector abundance well above average [NOTE: Specific measures of abundance for the 2004 season are being developed]16WNv Surveillance FactorValueBenchmarkSeasonalRisk ScoreShortTerm RiskScore3. Virus isolation in adult mosquito species withknown competence to serve as a bridge oramplification vector of WNv (see #2 above for speciesdefinitions)1345No WNv infection detected in vector-competent speciesWNv infection detected in 1-4 pools of vector-competentspecies (either localized or geographically dispersed)WNv infection detected in 5 or more pools of vectorcompetent species (geographically dispersed in a waythat indicates intense localized WNv activity)WNv infection detected in 5 or more pools of vectorcompetent species (geographically dispersed in a waythat indicates widespread WNv activity)4.WNv Testing of Sentinel Chickens.Number of chickens in a flock that show laboratoryevidence of new infection with WNv12345No new positive tests among sentinel chickens in OregonNew positive tests among sentinel chickens in Oregon orSW Washington but outside the 6 county MetropolitanareaOne new positive test in one Multnomah County flockOne new positive test in two or more MultnomahCounty flocksTwo or more new positive tests per flock in one or moreMultnomah County flocks17WNv Surveillance FactorValueBenchmarkSeasonalRisk ScoreShortTerm RiskScore5.Dead bird infectionIncludes zoo collections; excludes sentinel chickensNOTE: Interest is in bird populations whosecharacteristics (including local residence time andranges in the Portland Metropolitan area) make itlikely that the population(s) will contribute to WNvtransmission and amplification.12345No WNv positive dead birds in OregonWNv positive dead bird in Oregon, Washington, but nonein 6 county Portland metropolitan areaOne confirmed WNv positive dead bird in a Portlandmetropolitan area county other than Multnomah CountyOne confirmed WNv positive dead bird reported inMultnomah CountyMultiple confirmed WNv positive dead birds in MultnomahCounty6.Horse (equine) casesNOTE: Includes only horse cases that have beeninvestigated and classified as locally-acquired1345No horse cases in 6 county Portland metro areaOne horse case in 6 county Portland metro areaOne horse case in Multnomah CountyMultiple horse cases in Multnomah County7.Human casesNOTE: Includes only human neuroinvasive cases thathave been fully investigated by the appropriate healthdepartment and classified as locally-acquired12345No human cases in OregonOne human case in Oregon or SW Washington outside the6 county Metropolitan area (i.e., none within the Metroarea)One human case in the 6 county Metropolitan areaOne human case in Multnomah CountyMultiple human cases in Multnomah County(geographically dispersed in a way that suggests eitherintense localized WNv activity or widespread WNv activity)18WNv Surveillance FactorValueBenchmarkSeasonalRisk ScoreShort-TermRisk Score8.Proximity of virus activity to populated areas(scored only if virus activity is detected)135Virus activity detected primarily in unpopulated areasbeyond usual flight range of infected human-bitingspeciesVirus activity detected in areas of low population densitythat are within usual flight range of infected speciesVirus activity detected in areas of high populationdensity that are within usual flight range of infectedspeciesTOTAL OF FACTOR SCORESNUMBER OF FACTORS SCOREDOVERALL SCORE(TOTAL/Number of Factors Scored)

Leve l Descriptio n Seasonal Risk Score Short Term Risk ScoreLevel A No WNv In Community 1.0–2.5Level B WNv in community - Low Human Health Risk2.6–4.5Level C Human Health Risk from WNv in LocalizedArea(s)4.6–4.7Level D Human Health Risk from WNv in Multiple Areasor Throughout the County4.8 or higher19WEST NILE VIRUS RESPONSE GUIDELINESMultnomah County Health DepartmentWest Nile Virus (WNv) Response Plan2007 Mosquito SeasonRESPONSE LEVEL ANO WNv DETECTEDCriteria:Seasonal and Short-Term Human Health Risk Assessment Score 1.0 – 2.5ANDNOWNv activity detected in Multnomah County or elsewhere in the 6 county Portland metropolitan area (Clackamas, Columbia, and Washington countiesin Oregon and Clark, and Skamania Counties in Washington)Basic Public Information andother Communication ActionsBasic Surveillance and Control ActionsAdditional Assessment andAction OptionsEmphasize coordinated public education that:ois user friendly & does not invoke fear;ois culturally and time appropriate;otargets at-risk populations;odescribes the relative risk of the disease;oincludes importance of ecology;odescribes how mosquito-borne diseases are spread,and the public’s role in reducing the risk oftransmission and in identifying WNv in thecommunity;oincludes information describing the County’s IPM andsource reduction activities.Track dead bird reporting by the public and agencies’ personnel.Collect and test appropriatesample dead birds for WNv.Continuously collect and test adult & larval mosquitoes perestablished protocols to assess abundance of mosquito species andpresence of WNv.Test sentinel chickens for WNv.Land managers identify ecologically sensitive areas.Assess County demographics to assess sizes, locations andcharacteristics of at-risk populationsPerform passive surveillance for WNv infection in humans &horses.Emphasize reducingmosquito breeding siteson public & privateproperty; coordinateefforts with state andother local agencies.Secure funding for longterm public education &program to assist at risk& low incomepopulations to reducerisks of WNv in the20Conduct proactive media campaign that introduces “NoSpray” option for the public, and that distinguishesbetween adulticide and aerial larvicide applications withlanguage such as “spraying for adult mosquitoes.”Begin public education at least one month prior tomosquito season.Routinely communicate withstate and local healthdepartments re: WNv surveillance findings.Conduct targeted larvicide applications based on assessment oflocal populations of immature mosquitoes that have significantpotential to carry and transmit WNv. Larvicide applications willconsider and reflect and land managers’ sensitive area designations.Promote source reduction activities by the public and personnel inappropriate agencies.Monitor effectiveness of mosquito control activities.Monitor human health impacts of mosquito control activities.Collaborate with land managers to monitor environmental impactsof mosquito control activities.home (e.g., windowscreens & neighborhoodclean-ups)21RESPONSE LEVEL B:WNv IN THE COMMUNITY, LOW HUMAN HEALTH RISKCriteria:Seasonal and Short-Term Human Health Risk Assessment Score: 2.6 – 4.5WITHWNv activity detected in Multnomah County orelsewhere in Portland Metropolitan AreaNOTE: All actions described in RESPONSE LEVEL A can be used inRESPONSE LEVEL B if they areappropriate and do not conflict with LEVEL B activities.Additional Public Information and otherCommunication Actions at This LevelAdditional Surveillance and Control Actions at This LevelAdditional Assessment andAction Options at This LevelNotify mass media via news release re: positive WNv surveillancefinding(s) utilizing public education guidelines in Level A.Initiate local information hotline.Enhance public education as appropriate (e.g., through links withcommunities/organizations, outreach workers, community healthnurses in course of regular duties, posters/flyers, web updates).Assure communication of vector surveillance data amongOregon’s local and state health departments.Enhance education to address factors related to biology ofmosquito species of concern (as identified by current localsurveillance data).Intensify public education on personal protection measures,including via mass media news releases.Provide direct updates to affected communities.Update information on WNv on Health Department web site.Intensify source reductionefforts as appropriate.Intensify targeted larvicide applications as appropriate inlight of surveillance findings.Institute active human surveillance if:oany human cases are detected,ORomultiple indicators of infection in birds/mosquitoesare positive,ORopositive indicators of infection in birds/mosquitoes arewidely dispersed.Adjust surveillance on dead birds/sentinel chickens toassure these activities provide significant informationabout the extent and intensity of WNv infection in thecommunity.Local Health Officer,Epidemiologist, and othersenior public health staff arecontinuously involved inevaluation of surveillanceresults to:oAssess diseasetransmission risk;oContribute to decisions oncommunication,surveillance and control .22RESPONSE LEVEL C:HUMAN HEALTH RISK FROM WNv IN LOCALIZED AREA(S)Criterion:Short-Term Human Health Risk Assessment Score: 4.6 – 4.7NOTE: All actions described in RESPONSE LEVELS A and B can be usedin RESPONSE LEVEL C if theyare appropriate and do not conflict with LEVEL C activities.Additional Public Informationand other CommunicationActions at This LevelAdditional Surveillance andControl Actions at This LevelAdditional Assessment and Action Options at This LevelIntensify public education,emphasizing preventivemeasures public can take toreduce transmission.Publicize Health Department’sdetermination ofHumanHealth Risk in LocalizedAreas(s)though mass medianews releases.Provide direct updates toaffected communities usingrisk communicationtechniques to allay undue fearand anxiety.Include appropriatenotification re: ULV sprayingas part of public informationapproach.Intensify surveillance forinfected mosquitoes in localizedarea(s) of concernIntensify targeted larvicideapplications as appropriate inlight of surveillance findings.Local Health Officer is directly involved in:oEvaluation of all relevant data related to human health risks, andoDecision-making related to ULV use, acting as the final decision maker.Health Department may consider focused ULV application as a tool to reduce furthertransmission to humans.Health Department will take into account atleast the following factors in consideringpossible ULV use in this situation:oPotential effectiveness of ULV application in light of current information onmosquito ecology, mosquito populationabundance, intensity of WNv infection,and adulticide resistance as determined bydata from localized area(s) of concern;oTime of year;oProximity of virus activity to at-risk human populations;oConcerns of specifically impacted communities;oPotential human health risks associated with ULV applications, and possiblestrategies to mitigate these risks;oPotential environmental risks associatedwith ULV applications, and possiblestrategies to mitigate these risks; andoApplicable environmental regulations.The Department will undertake ULV applications only in situations where:23oIt can perform post-application evaluation of effectiveness; post-applicationevaluation data will be used to decide whether to continue or stop adulticide use;oThere is a system in place for trackingand responding to potential adversehuman health impacts;oIt has notified wildlife/habitat area managers about planned adulticide use so thatthose agencies and their partner agencies can collaborate with the HealthDepartment in monitoring for environmental impacts as appropriate.After considering the above factors, if the Health Department chooses to performULV applications it will develop an application plan specific to the localized area(s)of concern. This plan will take into account:oLocal geographic and topographic factors in the natural and built environmentsthat could affect success ofapplication (e.g., road patterns, buildings, vegetation,etc.),oWeather and atmospheric conditions,oAccess to equipment and materials to allow ULV applications that are extensiveenough that they are likelyto be effective, andoTiming of application (i.e., time of day) to maximize effectiveness and minimizehuman exposure.The localized ULV application plan will also address appropriatenotification and information to be provided in the localized area(s) aswell as the broader community.24RESPONSE LEVEL D:HUMAN HEALTH RISK FROM WNv IN MULTIPLE AREAS OR THROUGHOUT COUNTYCriterion:Short-Term Human Health Risk Assessment Score: 4.8 or higherNOTE: All actions described in RESPONSE LEVELS A, B and C can beused in RESPONSE LEVEL C if theyare appropriate and do not conflict with LEVEL D activities.Additional Public Information and otherCommunication Actions at This LevelAdditional Surveillance and ControlActions at This LevelAdditional Assessment and Action Optionsat This LevelShift public education to focus primarily on preventiveactions public can take to reduce transmission, andpersonal protective measures.Publicize Health Department determination ofHumanHealth Risk in Multiple Areas or Throughout Countythough mass media news releases and other educationalapproaches.Shift communication channels to emphasize:oUse of mass media appropriate to variouscommunities, andoUse of specialized communication pathways toaddress communities that tend not to utilize massmedia.Use risk communication techniques to allay undue fearand anxiety.Include appropriate notification re: adulticide sprayingas part of public information approach.Shift foci of surveillance to:oMonitoring overall mosquitopopulation distributions anddynamics,oIdentifying potential targets forfeasible vector controlinterventions, andoIntensifying actions to identifyand confirm human cases.Health Department will decrease ULVuse,but may consider focused ULVapplicationto address localized areas of increasedtransmission risk within the broader patternof human health risk.Any such localized use of ULV adulticideswould follow procedures and restrictions asdescribed in Level C.Health Department will consider othercommunity-level control actions (e.g.,canceling outdoor public events that presentunusual risk of WNv infection to attendees).25WNV GLOSSARYNote:Multnomah County Health Department developed thisGlossaryto support the WNV Task Force as it created its recommendation to the Health Department. Thecontents represent Multnomah County Health Department perspectives, ideas and definitions, but they are closely aligned with common scientific usage.TermsSentinel chickensFlocks of domestic chickens that are maintained in cages for the purpose of detecting transmission of mosquito-borne diseases.The county currently has 4 flockslocated at Sauvie Island, SE Portland, N Portland and SW Portland. Each flock has about 6 number] chickens. Blood is taken from the chickens every twoweeks, and is tested for signs of exposure to WNV and related viruses.Passive & active human and horse surveillanceSurveillance is the process that public health agencies use to detect cases of disease in the community.In passive surveillance, a health department establishes whichdiseases, conditions or events are reportable, and who (e.g., medical providers, laboratories) isrequired to report them. The department then waits to receive reports.In active surveillance, a health department periodically contacts selected providers or agencies and inquires whether they havenoted any occurrences ofidentified reportable events. For example, for active surveillance of possible WNv in humans, a health department might call selected neurologists (brainspecialists) every week during the summer to see if theyhave seen any patients with encephalitis symptoms.AdulticideChemical insecticides that are used to kill adult mosquitoes.Multnomah County would depend on the following adulticides in 2007 – all synthetic pyrethroids;some include synergists.Anvil 10+10Pyronil 525ScourgeULV (Ultra Low Volume) application. Adulticides are sprayed intothe air with the intent of killing mosquitoes that are flyingor resting in the sprayed area.ULV application is typically done with truck-mounted sprayers, butcan be done with aircraft. ULV produces very small dropletsthat hang in the air for afew hours. ULV application is done during atmospheric conditionsthat promote slow drift of the adulticide for a distance of afew hundred feet from thepath (or point) of application.By definition, ULV uses that smallest possible amount of adulticide that will kill adult mosquitoes. ULV can also kill other(“non-target”) insects.LarvicideNatural and synthetic insecticides that are used with the intentof killing immature mosquitoes during the phases of their lifewhen they live in water. MultnomahCounty depends on the following larvicides in 2004:26BiorationalsoAltosid – various formulationsoBacillus thuringiensis var. israelensis (BTi) – various formulationsoBacillus sphaericus – various formulationsSurfactantoGolden Bear OilLarvicides also kill immature forms of other (“non-target”) insects.There are two basic techniques used for applying larvicides:Ground-based application.Larvicides are placed into bodies of water by vector control staff by handor dispersed by backpacksprayers.Aerial application. Granular larvicides (e.g., BTi on corn-cob granules) are broadcast into bodies of water by spraying them from a helicopter. Aerialapplication has the benefits of being able to efficiently treat large areas or areas that are not accessible by Vector Controlstaff.Ecologically sensitive areasAreas that are maintained or preserved primarily for their habitat value, or that have local ecosystems that are particularly sensitive to disruptionEnvironmental Impact EvaluationEnvironmental Impact Evaluation – a process using reasonable scientific judgment to:Define potential adverse impacts of proposed mosquito control activities on an ecologically sensitive area, andIdentify necessary, appropriate and practical modifications tothe proposed mosquito control activities.This process should be carried out cooperatively between Vector Control and the agency responsible for stewardship of the ecologically sensitive area.NOTE: An Environmental Impact Evaluation is notthe same thing as an Environmental Impact Statement (EIS) such as those required under the EndangeredSpecies Act.HighNumerically-defined levels of immature or adult mosquitoes that are used as guidelines for control activities.Larval – 1 larva per standard dip (random 400 mL dip in body of water)Adult –more than 100 adult mosquitoes collected in an EVS (encephalitis viral surveillance), Gravid, or New Jersey Light trap in 8 hoursAbundantSynonym for highAdjacent communityThe five counties adjacent to Multnomah County – Clackamas and Washington and Columbia Counties in Oregon, and Clark and Skamania counties inWashington27MultipleMore than one. When used in public health decision-making, the concept of multiple can also imply both the actual number of events and how fast they areincreasing over time.BiorationalBiorational pesticides are derived from a variety of biological sources, including bacteria, viruses, fungi and protozoa. Theyalso include chemical analogues ofnaturally occurring biological chemicals such as pheromones and insect growth regulators (IGRs). These analogues are consideredthird-generation pesticidesthat are more environmentally sound and closely resemble or are identical to chemicals produced by insects and plants. Biorational products are quite differentfrom conventional, broad-spectrum pesticidesin that they are typicallytarget-specific and have little to no acute impact on most non-target organisms.SynergistA substance added to a pesticide to enhancethe effectiveness of the active ingredient.In adult mosquito control, synergiststypically prevent detoxification of theadulticide by the mosquito.Chemical sensitivityThe experience of having adverse effects after exposureto a given chemical or chemical combination.CorvidMember of the family of birds including jays and crowsEquineHorseVectorA species that is capable of carryingdisease organisms to another speciesCompetent vectorA vector species that is relatively efficient as a vectorfor transmitting a particular disease-causing organismBridge vectorA vector species that has a relatively wide range of host species with which it interacts and cantransmit disease-causing organisms. Because they interact withdifferent host specifies, bridge vectors can transmit disease among multiple host species (serving as a “bridge” between species).Amplification vectorA vector that serves as a primary pathwayfor transmission of disease within a speciesor within narrow group of species. These vectors have relatively narrowrange of host species to which it transmitsdisease-causing organisms. This results in increasing rates of infection within those hosts (“amplification”).28Lag time(for human or horse infections)The period of time between the actual transmission of a disease-causing organism (e.g., by a mosquito) and the occurrence and recognition of disease in a host(e.g., a person). In a broader sense, lag time can be thought of as the period between the ecological phenomena that drive disease transmission and theagency/societal recognition of significant disease transmission in a population. Example: The period between establishment ofa high rate of mosquito infectionwith WNV, and reporting of a human case toa health department. Lag time is important in considering targets and potential effectiveness of proposedinterventions.29Part V. PUBLIC EDUCATION AND AWARENESS: DESCRIBE PLANAND DATES FOR EACH ACTIVITY.Notify the general public and facilities wherespecial vulnerable populations are found:(2.1) Hospitals(2.2) Health care facilities(2.3) Facilities for the elderly(2.4) Schools(2.5) Daycare facilities(2.6) Kennels and other animal shelters(2.7) OtherMCVNC does not routinely make wide scale/county-wide adulticide applications. As previously described in Part IV, Pest Controland Management Section 2 “Adult Control Rationale”, MCVNC would notify the above and other stakeholders, by use of the massmedia. Mass media includes an extensive educational program, website (www.mchealthinspect.org), phone surge capacity, andeducational printed materials. Additionally, MCVNC is a program within the Multnomah County Health Department and has theability to use multiple methods of communication including the Oregon Health Alert Network (HAN) and various listserves. Fordetailed information, see Communication Plan below. Note that the Communication addresses WNV, but also serves as an outline forother mosquito-borne disease communications.Communication Planis as follows;Goal: To increase public awareness of WestNile Virus (WNV) including education on mosquito-borne diseases, disease surveillanceand prevention, and integrated pestmanagement control techniques.SummaryUsing the media, presentations to communitygroups, and collaboration with community agencies and elected officials, MultnomahCounty Health Department and Public Affairs will increase public awarenessof mosquito-borne diseaserisk, what people can do tolimit their risk and county government’s rolein WNV surveillance and control. If surveillance data indicate increased WNV risk forhumans, the application of pesticides to control adult mosquitoes will be required.In order to assure accurate and timely informationof these mosquito control activities, Public Affairs will workwith the Health Department toprovide the public with applicationschedules, the type of pesticidesbeing used, and how to reduce theirexposure to these pesticides.30Phase 1: Normal Situation, No / Very Low Risk of Human InfectionMessagesThe early messages are designed to providea baseline of information about WNVand the county’s mosquito monitoring andcontrol efforts. The public is given the first messages on eliminating standing water around the home.Mosquito monitoring system in place and control of floodwater mosquito populationsNo evidence of West Nile Virus found in mosquitoes or birdsShift from ground level applicationsof larvicide to more effective aerial applications in floodwater areasInitial messages about household prevention measuresMethodsMedia releases during peak mosquito seasonsIdentification of stakeholder groupsPreparation of materialsfor dissemination to publicDevelopment of strategies to reach people with low reading levels and thosewhose primary language is not EnglishPhase 2: Basic Public Education, Low Risk of Human InfectionMessagesThe Multnomah County Health Department has a comprehensive plan to reduce the threat of WNV through disease surveillance,mosquito management and control, and measures thepublic can take to reduce exposure to mosquitoes.County’s prevention strategies and activities address threat andminimize necessity of pesticideapplications for adult mosquitocontrol.Disease surveillance helps with early identification of WNV’s arrival in the areaby testing larval and adult mosquitoes,sentinel chickens, and dead crows for WNV. Veterinarians are encouraged toreport cases in horses. To date, no mosquitoes,birds, or horses with WNV havebeen identified in Oregon.Mosquito management and control activities: public education on removing standing water and other breeding sites, use oflarvicides, and flood water control by the county to reduce the number of mosquitoes.Protective measures such as clothing, repair of window & door screens.Baseline education on repellents.Public to report dead birds through telephoneinformation line or online form. Proper handling and disposal of dead birds.31MethodsDevelop fact sheets or Q/A sheets in multiple languages (adaptation of materials from other states as appropriate.)Develop a pictorial poster in multiplelanguages for populations that learn moreeffectively from graphic communicationsmethods. This includes people with low reading levels as well as people from cultures where pictorial methods are broadlyused regardless of literacy level.Update website.Create a master database encompassing contacts in other jurisdictions, public health officials,and the scientific community, aswell as collaborators, associations, andcommunity organizations. Communicate to stakeholders via mail, fax lists and/oremail lists.Brief elected officials including MultnomahCounty Board of Commissioners, City of Portland, Gresham, Fairview, WoodVillage, Troutdale, Maywood Park, etc.Educate medical providers on encephalitis,meningitis, reporting requirements, and howto submit specimens for lab testing.Updates on WNV to reinforce reporting requirements. Utilize local and state Medical Society publications, websites, fax, emailgroups, and Oregon Department of Human Services’ Current Disease Summary. Email toHospital infection control via listserve.Distribute print material to communityorganizations, neighborhood associations, schools, senior centers and care facilities,libraries, recreation centers, etc.Brief Media, including editorial board visits. Provide periodic status reports as needed via media releases.Presentations to a variety of organizationsand presence at communityfairs and other public gatherings as staff time allows.Collaborate with business and other jurisdictions to disseminateprevention messages.Communicate with Multnomah County employees via the MINT (county intranet).Phase 3: Surveillance Indicates Increased / Medium Disease Risk for HumansMessagesThe health department will actively involveveterinarians and human health providers in disease surveillance and expand orintensify existing publiceducation and outreach.Provide information to Veterinarians to monitor encephalitisand other mosquito-borne disease among pets and horses.Publicize telephone hotline and website for information and to report standing water.Encourage protective measures such as clothing, repair of window & door screens, and use of insect repellent when outdoors.Educate medical providers on encephalitis,meningitis, reporting requirements, andhow to submit specimens for lab testing.32Provide monthly updates on WNV to reinforce reporting requirements. Possible Continuing Education offerings. (Assist statewith these activities as needed.)In the event that pesticide application becomes necessary; the Health Department willmake every attempt to minimize adverseimpacts to the environment and human health.MethodsDissemination of radio and television Public ServiceAnnouncement scripts and frequent media releases.Provide frequent updates to Environmental Health website to reflect the most currentinformation and include local maps todescribe geographic areas in which WNV has been identified. Website should have the ability to receive and monitor emailreporting dead birds and standing water.Use county Information and Referral line and Communicable Disease hotline with recorded messages.Utilize local and state Medical Society publications, websites,fax, email groups. Oregon Department of Human Services’Current Disease Summary. Email to Hospital infection control via list serve.Elicit assistance from educators andhealth outreach workers to providegrassroots community education.Communicate with Multnomah Countyemployees via county-wide email.Collaboration with other jurisdictions to disseminate messages.Phase 4: High Risk of Human Infection / Pesticide ApplicationMessagesThe county health department will provide further public education on the signs and symptoms ofWNV, and specific informationon pesticides used on adult mosquitoes.Public awareness of signs and symptoms of WNV.Information on adulticides being used, including application schedulesand locations, how to reduceexposure, and what to doin the event of pesticide exposure.Alert medical providers and Poison Control Hotline of potential for reporting of exposures to them. Advise public to contactPoison Control Hotline and medical provider with any reported exposures.Specific product information on pesticideswill be made available to the public.Advise public not tocarry out mosquitocontrol around the home using retail pesticides.Methods33Communication with health care providers, hospitals, to announce spraying is to occur.Posting of spraying locationsand schedules on website.Dissemination of radio and television Public Service Announcement scripts and frequent media releases.Coordinate with public safetyagencies to urge people to reduce or limit outdoor activities.34WNV Communication TreeInitial call receiver(See list for specific names)HD Administration, HO, CD Manager, EH Manager, PIO,Vector Supervisor, PDS, Health EducatorHealth DepartmentAdministrationCD/OHOManagerCD LeadStaffEH ManagerHealthOfficerVectorSupervisorCD TeamPIOEHCD TeamAsst. HO&EMSVector TeamCD On-callPersonEHTeam35 

### 2. Use multimedia resources to provide notification: (2.1) Newspaper (2.2) Television (2.6) Radio MCVNC works through the Mu ltnomah County Public Affa irs Office for coordinated and individual media response. MCVNC receives and responds to approx 50-150 media inquiries annually. Our depart mental policy is as follows;

Due to the nature of vector control wor k, most media inquirie s are “non-routine” as defined in the Multnomah County Health Depa rtment Administrative Guidelines. These questions, by letter, fax, or telephone from a media group regarding a non-routine issue, are usually in the form of crisis situation or allegations. Some examples of this are health

hazards and controversia l public policy decisions

IMPLEMENTING PROCEDURES

1) Relay media inquiry to appr opriate MCVNC media liaison

2) MCVNC media liaison is required to gather the following information;

a) contact information of medi a party requesting interview b) date of media interview c) date of expected release of interview d) talking points of interview, in brief

3) MCVNC media liaison will forward the in formation as described in #2 above, electronically in bulleted form, to the one of the two following groups of people based upon the content of the media i nquiry. The groups are described as;

a) for media inquiries that refer to st andard practices of MCVNC forward

information to:

MCVNC supervisor EH manager Disease Prevention and Control Dept. manager

Public Affairs contact

b) for media inquiries that refer to c ontroversial issues of MCVNC forward information to;

MCVNC supervisor EH manager Disease Prevention and Control Dept. manager

Public Affairs contact

Public Health officer Director of Health Dept.36 

### 4) If the nature of inquiry is sewer related, forward the request to Mark Braun, BES and synonymously notify the work site supervisor of the request.

(2.3) Recorded Message MCVNC through direct input by Communicable Disease, Environmental Health, Food Handlers, and Vector and Nu isance Control (MCVNC) has c ooperatively created a phone tree system to triage the antic ipated phone call volume associ ated with West Nile virus (WNV) for Multnomah County and surrounding communities

. 

### This phone system will incorporate other vector related informati on as it surfaces in the future; active since

3/1/03.

(2.4) Mailers (2.5) Newsletters MCVNC regularly provides printed information to Mu ltnomah County citizens and others in surrounding communities upon request. Printed materials typically are designed to target a general audience for source reductio n and prevention of vectors. Materials are reviewed when necessary for current inform ation and are available in several languages other than English.

(2.7) Web page MCVNC web page is at www. healthinspect.org . Web pages are designed to target a general audience for source reduction and prevention of vectors but also include electronic complaints forms, dead bird reporti ng information and notification to spray.

Additional materials are revi ewed when necessary for current information and are available in several language s other than English.

3. Presentations MCVNC will present educationa l presentations upon request as resources allow with the assistance of a community services team including a health educator and community

outreach workers.

4. Display educational materials at county fair s, health fairs, holiday events at City Hall, local museums, libraries and other community events and gathering places. MCVNC does present and post educational ma terials upon request or when necessary as resources allow. In 2007, we participated in and or hosted numerous educational outreach events. Some examples were a West Nile Virus Town Hall meeting and Columbia Slough Watershed Counc il presentation on WNV.

5. Recruit local media to help educate the public about vector control practices and

activities. MCVNC works through the Mu ltnomah County Public Affa irs Office for coordinated and individual media response. MCVNC receives and responds to approx 50-150 media inquiries annually. Our departmental policy is outlined above under “ 2. Use multimedia resources to provide notifica tion: (2.1) Newspaper, (2.2) Television, (2.6) Radio”.

6. Provide notification of vector control ac tivities in other languages when needed.37 

### MCVNC does use the Multnomah County Languag e Services for translation of printed

materials. To review our translated materials see www. healthinspect.org . MCVNC also

has video media of rodent/rat control translated in Vietna mese and Spanish. Materials follow the recommendations of the April 2007 summary, Culturally-Specific Populations Emergency Communications Project for Cl ackamas, Clatsop, Columbia, Multnomah, Tillamook and Washington Counties Fi nal Report Overview, Synthesis,

Recommendations by Northwest Oregon Health Prepar edness Organization (NW-HPO).

7. Provide your Pesticide Use Plan (PUP) to all local wildlife agencies in your

district. By Oregon Revised Statutes Chapter 452, MCVNC provides the PUP to all wildlife agencies

8. Provide the public with phone numbers to call if they have questions or problems

. MCVNC phone numbers provided on all of our informational materials.

Vector control Pesticide Use Plan: District Name: Multnomah County Vector and Nuisance Control

Date :2008



### CONTROL AGENT WORKSHEET

IMPORTANT: Complete One Work sheet for each Control Agent

PRODUCT NAME: Altosid Pellets

EPA REGISTRATION#:2724-448- ACTIVE INGREDIENTS:Methoprene (CAS #65733-16-6) @ 4.25%

TARGET PEST: Aedes spp., Ochlerotatus spp., Culex spp., Culiseta spp., and Anopheles spp. mosquito larvae

RATE OF APPLICATION: 

### (Give in units of pounds of active ingredient per acre and/or pounds of product per acre) 0.1 to 0.4 lb. of active per acre

APPLICATION METHOD: ( Describe the application apparatus, product diluent, mixture, if any, and application process)38 

### Pellets are applied by hand or granule spreader to the mosquito larval habitat. Lower rates will be used in floodwater areas. Higher rates will be u sed in ditches, waste tires, artificial containers and waste-water areas. Power backpack bl owers may be used in some situations.

APPLICATION SITE: (Describe the types of pest habitat where the product will be applied) Floodwater habitat, ditches, waste tires, artif icial containers and waster water areas.

POUNDS OF ACTIVE INGREDIENT TO BE USED:estimated 6.008 lbs

ACRES TO BE TREATED:estimated 38 acres

POUNDS OF ACTIVE INGREDIENT USED LAST YEAR: 7.85 lbs

PRODUCT NAME: Altosid XR Extended Residual Briquets

EPA REGISTRATION #: 2724-421 ACTIVE INGREDIENTS: (S)-Methoprene [Isopropyl (2E, 4E, 7S)-11-methoxy-2,7,11- trimethyl-2,4-dodecadienoate] TARGET PEST: Aedes spp., Ochlerotatus spp., Culex spp., Culiseta spp., and Anopheles spp. mosquito larvae RATE OF APPLICATION: pe r label "1 briquet per 1 2 00 ft square" APPLICATION METHOD: manually placed by MCVNC staff person APPLICATION SITE: water-holding sites such as st orm drains, catch basins, etc of a municipal water collection system POUNDS OF ACTIVE INGREDIENT TO BE USED: estimated 7623 briquets to be placed

ACRES TO BE TREATED: estimated 35 acres

POUNDS OF ACTIVE INGREDIENT USED LAST YEAR: 14526 briquets placed

PRODUCT NAME: FLIT 10 EC

EPA REGISTRATION #: 4816-688-8329/Per PICOL 8329-67 ACTIVE INGREDIENTS: Permethrin @ 10% TARGET PEST: Aedes spp., Ochlerotatus spp., Culex spp., Culiseta spp. and Anopheles spp. adult mosquitoes adult mosquitoes RATE OF APPLICATION: 8.75 fl oz. per acre (17.5 oz / acre diluted)39 

### APPLICATION METHOD: 1 part Flit 10EC will be dilluted with 1 part water. The diluted material will be applied as a barrier treatment using Maryuama Backpack Mist Blowers with a walking speed of 2mph APPLICATION SITE: Diluted material will be appl ied to foilage surrounding affected areas. Applications will take place when results of a si ngle EVS Trap at the site reach a total 500 adult mosquitoes in a single night or landing rates exceed 20 per minute POUNDS OF ACTIVE INGREDIENT TO BE USED: estimated 0.2-0.3 gallons

ACRES TO BE TREATED: estimated 17 acres

POUNDS OF ACTIVE INGREDIENT USED LAST YEAR: - 0.217 gallons

PRODUCT NAME: Abate 4-E EPA REGISTRATION #: 8329-15/ per PICOL 8329-60 ACTIVE INGREDIENT: Temephos @ 4lbs per gallon TARGET PEST: Aedes spp., Ochlerotatus spp ., Culex spp., Culiseta spp., Anopheles spp. mosquito larvae RATE OF APPLICATION: 0.016 to 0.047 lb. active / acre (0.5 to 1.5 fluid ozs. / acre) APPLICATION METHOD: This produc t is diluted in water at a maximum rate of 0.25 fluid ounces of product per gallon of finished spray. Six gallons of finished spray are used to cover an acre by backpack application. APPLICATION SITE: The main application is for control of Aedes spp. & Ochlerotatus spp. larvae in temporary woodland pools during cold weat her. It is also used in waste tires, some roadside ditches, and sewage polluted sites. This product is not used in areas of special

environmental concern. POUNDS OF ACTIVE INGREDIENT TO BE USED: estimated 1.25 gallons

ACRES TO BE TREATED: estimated 25 acres POUNDS OF ACTIVE INGREDIENT USED LAST YEAR: 0.756 gallons

PRODUCT NAME: GB-1111 @ 98.7%

EPA REGISTRATION #:8898-16

ACTIVE INGREDIENT: Petroleum distillate CAS # 008002-05-9 TARGET PEST: Aedes spp., Ochlerotatus spp., Culex spp., Culiseta spp., Anopheles spp. mosquito larvae and pupae RATE OF APPLICATION: 2.94 to 4.91 lbs. active / acre (3 to 5 gallons per acre) APPLICATION METHOD: This produc t is applied undiluted using b ackpack sprayers calibrated to deliver 4 gallons per acre. It is used primarily for the control of late fourth instar larvae and pupae which are not affected by most other materials.

APPLICATION SITE: Habitats include floodwater s, catch basins and dead end sewer plant

runways. POUNDS OF ACTIVE INGREDIENT TO BE USED: estimated 10 gallons

ACRES TO BE TREATED: estimated 10 acres POUNDS OF ACTIVE INGREDIENT USED LAST YEAR: 0.1380 gallons

PRODUCT NAME: VectoLex WDG @ 51.2% EPA REGISTRATION #: 275-135/ per PICOL 73049-57 ACTIVE INGREDIENT: Bacillus Sphaericus Serot ype H5a5b, strain 2362 dried concentrate @

51.2% TARGET PEST: Culex spp., Coquillettidia spp. Oc hlertotatus spp., and Aedes spp. mosquito

larvae RATE OF APPLICATION: .5 to 1.5 lbs per acre40 

### APPLICATION METHOD: Vectolex tobac Vectobac WDG is diluted in water at a maximum rate of 4 ozs. per gallon of finished spray. Application is made using backpack sprayers calibrated to deliver 6 gallons of the suspension

per acre. APPLICATION SITE: Habitats will include sludge lagoons, sewage lagoons, septic polluted ditches, sewage treatment plant still waters. Appli cations also will be made the floodplains of the

Columbia and Willamette Rivers in areas where water has been trapped be hind after the spring freshets. These type of applications will only be made if these areas are producing large hatches of Culex mosquitoes

POUNDS OF ACTIVE INGREDIENT TO BE USED: estimated 4.224 lb

ACRES TO BE TREATED: estimated 8 acres

POUNDS OF ACTIVE INGREDIENT USED LAST YEAR: 0 lb

PRODUCT NAME: Pyronyl Oil Concentrate #525

EPA REGISTRATION #: 655-471 ACTIVE INGREDIENT: Pyrethrins & Piperonyl Butoxide Technical @ 30% cumulative TARGET PEST: Aedes spp., Ochlerotatus spp., Co quillettidia spp., Culex spp., Culiseta spp. and Anopheles spp. adult mosquitoes

RATE OF APPLICATION: maximum of 0.0025 lb of pyrethrins and 0.0125 lb of piperonyl butoxide per acre. APPLICATION METHOD: This product may be used as supplied or diluted with diluent such as light mineral oil or deodorized kerosene in UL V cold fogger calibrated to deliver 0.24 oz of material per acre with a median droplet size of 8 to 20 microns. Applications are made when a temperature inversion is present and wind speed is between 2 and 8 mph. If public access to treatment areas cannot be avoided during applicati on, areas are posted 24 hours prior to treatment. APPLICATION SITE: Habitats include floodplains , industrial wastelands , woodlots, farmlands, large parks, and other areas where adult mosquito es are harboring. Residential areas will only be

treated in the event of mosquito-borne disease. POUNDS OF ACTIVE INGREDIENT TO BE USED: estimated 2.5 gallons

ACRES TO BE TREATED: estimated 1121 acres POUNDS OF ACTIVE INGREDIENT USED LAST YEAR: 0 gallons

PRODUCT NAME: Scourge Insecticide with SB P-1382/Piperonyl Butoxide 18% + 54% MF

EPA REGISTRATION #: 432-667 ACTIVE INGREDIENT: Resmethrin & Piperonyl Butoxide TARGET PEST: Aedes spp., Ochlerotatus spp., Co quillettidia spp., Culex spp., Culiseta spp. and Anopheles spp. adult mosquitoes RATE OF APPLICATION: 0.3 fluid ounces of Resmethrin / acre (0.0035 active per acre) APPLICATION METHOD: Scourge is mixed with e ither soybean oil or deodorized kerosene at the rate of one part Scourge to 2.33 parts diluent. The diluted material is released through a ULV cold fogger calibrated to deliver one ounce of mate rial per acre with a median droplet size of 8 to 20 microns. A minimum 600 foot buffer is pr ovided between application sites and surface waters. Applications are made when a temp erature inversion is present and wind speed is between 2 and 8 mph. If public access to treatme nt areas cannot be avoided during application, areas are posted 24 hours prior to treatment. APPLICATION SITE: Habitats include floodplains, industrial wastelands, woodlots, large parks, and other areas where adult mosquitoes are harborin g. Residential areas will only be treated inthe event of mosquitoborne disease.41 

### LBS OF ACTIVE INGREDIENT TO BE USED: estimated 0.0135 lbs

ACRES TO BE TREATED: estimated 1280 acres

LBS OF ACTIVE INGREDIENT USED LAST YEAR: 0

PRODUCT NAME: Vectobac G EPA REGISTRATION #: 275-50/ per PICOL 73049-10 ACTIVE INGREDIENT: Bacillus Thuringiensis Serotype H-14 @ 0.2% TARGET PEST: Aedes spp., Culex spp., Anophe les spp., Culiseta spp., Ochlerotatus spp, mosquito larvae

RATE OF APPLICATION: 0.01 to 0.02 lbs. activ e / acre (5 to 10 lbs. product per acre) APPLICATION METHOD: This product is applie d using power backpack granule blowers and may be applied by aerial application this sea son. Application rates will range from 5 to 10 pounds per acre. APPLICATION SITE: This product is used for the majority of large scale treatments of floodwater areas. Examples are the floodplains of the Columbia and Willamette rivers as well as various other intermittently flooded wetlands. Applications of this material may also be made to control hatches of Anophele species in standing water left behind after the spring freshets.

LBS OF ACTIVE INGREDIENT TO BE USED: estimated 112 lbs

ACRES TO BE TREATED: estimated 7230 acres

LBS OF ACTIVE INGREDIENT USED LAST YEAR: 76.61 lbs

PRODUCT NAME: Vectolex CG EPA REGISTRATION #: 275-77/ per PICOL 73049-20 ACTIVE INGREDIENT: Bacillus sphaericus Serotype H5a5b (50 B.S. ITU/mg) @ 7.5% TARGET PEST: Culex spp., Ochlerotatus spp., Ae des spp., Coquillettidia spp., mosquito larvae RATE OF APPLICATION: 0.75 to 1.50 lbs. active / acre (10 to 20 lbs. product per acre) APPLICATION METHOD: Applications will be made with a power backpack granule blower or a hand operated crank seeder. Equipment will normally be calibrated to deliver 10 lbs. per acre at walking speeds of 1 to 2.5 mph. Additionaly la rge scale applications to sites greater than 100 acres in size may be made by aerial application. These large scale applications will be made at a rate of 5 to 10 pounds per acre to control large hatches of Culex spp. mosquitoes.

APPLICATION SITE: Habitats will include sludge lagoons, sewage lagoons, septic polluted ditches, sewage treatment plant still waters. Appli cations also will be made the floodplains of the

Columbia and Willamette Rivers in areas where water has been trapped behind after the spring freshets. These type of applications will only be made if these areas are producing large hatches of Culex spp.

POUNDS OF ACTIVE INGREDIENT TO BE USED: estimated 860 lbs

ACRES TO BE TREATED: estimated 2108 acres

POUNDS OF ACTIVE INGREDIENT USED LAST YEAR 898.05 lbs

PRODUCT NAME: Vectobac CG EPA REGISTRATION #: 275-70/ per PICOL 73049-19 ACTIVE INGREDIENT: Bacillus thuringiensis Serotype H-14 @ 0.2% TARGET PEST: Culex spp., Culiseta spp., Aed es spp., Ochlerotatus spp., Anopheles spp., mosquito larvae

RATE OF APPLICATION: 0.01 to .02 lbs. ac tive / acre (5 to10 lbs. product per acre) APPLICATION METHOD: Application will be made with a power backpack granule blowers at 7.5 pounds per acre This material may be applied by aerial application to sites larger than 100

acres.42 

### Rate of application for aerial work will be 5 to 10 pounds per acre and woul d be made to control large hatches of Anopheles spp. APPLICATION SITE: This is used for the majority of large scale treatments of floodwater areas. Examples are the floodplains of the Columbia and Willamette Rivers as well as other intermittently flooded wetlands

POUNDS OF ACTIVE INGREDIENT TO BE USED: estimated 0.1 lbs

ACRES TO BE TREATED: estimated 8 acres

POUNDS OF ACTIVE INGREDIENT USED LAST YEAR: 0 lbs

PRODUCT NAME: VectoLex WSP

EPA REGISTRATION #: 73049-20 ACTIVE INGREDIENTS: Bacillus sphaericus Se rotype H5a5b, strain 2362 Technical Powder (670 BsITU/mg) @ 7.5% TARGET PEST: Aedes spp., Ochlerotatus spp, Culex spp., Coquillettidia spp., and Anopheles spp. mosquito larvae

RATE OF APPLICATION: Per la bel "1 pouch/50 sq. ft." APPLICATION METHOD: Placing one soluable pu ch per 50 sq. ft. of treatment area with reapplication 1-4 weeks following as necessary. APPLICATION SITE: Stormwater and drainage systems, etc in non-crop sites.

POUNDS OF ACTIVE INGREDIENT TO BE USED: estimated 2.47 lbs

ACRES TO BE TREATED: estimated 3 acres

POUNDS OF ACTIVE INGREDIENT USED LAST YEAR: 20.41 lbs

PRODUCT NAME: Vectobac 12AS EPA REGISTRATION #: 275-102/ per PICOL 37049-38 ACTIVE INGREDIENT: Bacillus thuringiensis, subsp. israelensis @1.2 % TARGET PEST: Culex spp., Culiseta spp., Aed es spp., Ochlerotatus spp., Anopheles spp., mosquito larvae RATE OF APPLICATION: By ground 5-100 ga llons/acre using backpack equipment.

APPLICATION METHOD: Vectobac 12 AS is diluted in water at a maximum rate of 5.33 ozs. per gallon of finished spray. Application is made using backpack sprayers calibrated to deliver 6 gallons of the suspension per acre. This is used for general purpose larvaciding. Application will be made with a power backpack granule blower s at 7.5 pounds per acre This material may be applied by aerial application to sites larger than 100 acres. APPLICATION SITE: The product may be used on a variety of larval habitats including floodwaters, roadside ditches, temporary pools, etc. It is used heavily, early in the season, for control of Aedes in rainwater pools. This is u sed for the majority of large scale treatments of floodwater areas. Examples are the floodplains of the Columbia and Willamette Rivers as well as other intermittently flooded wetlands POUNDS OF ACTIVE INGREDIENT TO BE USED: estimated 0.10 gallons

ACRES TO BE TREATED: estimated 60 acres POUNDS OF ACTIVE INGREDIENT USED LAST YEAR: 0 gallons

PRODUCT NAME: Anvil 10+10 ULV

EPA REGISTRATION #: 1021-1688-8329 ACTIVE INGREDIENTS: Sumithrin @ 10.00% CAS #026002-80-2 & Piperonyl Butoxide @ 10.00% CAS #000051-03-6 (cum. 20%/gal) TARGET PEST: Aedes spp., Ochlerotatus spp., Co quillettidia spp., Culex spp., Culiseta spp. and Anopheles spp. adult mosquitoes RATE OF APPLICATION: Ground ULV & Aerial rates = 0.0024 oz active/acre;43 

### APPLICATION METHOD: Using a 300ft swath width, applied undiluted in ULV cold fogger calibrated to deliver 1.3 to 5.1 oz of material pe r acre, at a truck speed of 5-20 mph, with a median droplet size of 5 to 25 microns. For aeria l application, 50 microns or less with no more that 2.5% exceeding 100 microns at 0.21-0.62 oz/per acre. Applications are made when a temperature inversion is present and wind speed is between 2 and 8 mph. If public access to treatment areas cannot be avoided during application, areas are posted 24 hours prior to treatment.

APPLICATION SITE: residential and recreational areas where adult mosquitoes are present in parks, woodlands, swamps, marshes, etc POUNDS OF ACTIVE INGREDIENT TO BE USED: estimated 3.82 gallons

ACRES TO BE TREATED: estimated 4000 acres POUNDS OF ACTIVE INGREDIENT USED LAST YEAR: 1.59 gallons

PRODUCT NAME: Aqua-Kontrol Concentrate

EPA REGISTRATION #: 73748-8 ACTIVE INGREDIENTS: Permethrin @ 20.0% and Piperyonyl Butoxide Technical @ 20.0% TARGET PEST: Aedes spp., Ochlerotatus spp., Co quillettidia spp., Culex spp., Culiseta spp. and Anopheles spp. adult mosquitoes RATE OF APPLICATION: Barrier Spray @ 0.00175/0.00175 # ai./acre APPLICATION METHOD: Using a 50 ft swath while walking @ 2 mph speed for large droplet partical application .

APPLICATION SITE: residential and recreational areas where adult mosquitoes are present in parks and other locations as label states

POUNDS OF ACTIVE INGREDIENT TO BE USED: 0

ACRES TO BE TREATED: 0

POUNDS OF ACTIVE INGREDIENT USED LAST YEAR: 0

PRODUCT NAME: Altosid XR-G

EPA REGISTRATION #: 2727-451 ACTIVE INGREDIENTS: (S)-Methoprene @ 1.5% RATE OF APPLICATION: 5-20 lbs per acre, species specific and when environment dictates otherwise as label specifies. APPLICATION METHOD: may be applied by aerial application or by ground with granular spreader. Does include clause for pre-hatch application as well APPLICATION SITE: crop and non-crop areas, including flood-land

POUNDS OF ACTIVE INGREDIENT TO BE USED: 2.44 lbs

ACRES TO BE TREATED: 9.25 acres

POUNDS OF ACTIVE INGREDIENT USED LAST YEAR: 0 lbs

PRODUCT NAME: MGK brand Pyrocide 7396

EPA REGISTRATION #: 1021-1569 ACTIVE INGREDIENT: Pyrethrins & Piperonyl Butoxide Technical @ 30% cumulative TARGET PEST: Aedes spp., Ochlerotatus spp., Co quillettidia spp., Culex spp., Culiseta spp. and Anopheles spp. adult mosquitoes

RATE OF APPLICATION: maximum of 0.0025 lb of pyrethrins and 0.0125 lb of piperonyl butoxide per acre. APPLICATION METHOD: This product may be used as supplied or diluted with diluent such as light mineral oil or deodorized kerosene in UL V cold fogger calibrated to deliver 0.24 oz of material per acre with a median droplet size of 8 to 20 microns. Applications are made when a temperature inversion is present and wind speed is between 2 and 8 mph. If public access to treatment areas cannot be avoided during applicati on, areas are posted 24 hours prior to treatment.44 

### APPLICATION SITE: Habitats include floodplains , industrial wastelands , woodlots, farmlands, large parks, and other areas where adult mosquito es are harboring. Residential areas will only be

treated in the event of mosquito-borne disease. POUNDS OF ACTIVE INGREDIENT TO BE USED: estimated 6.0 gallons

ACRES TO BE TREATED: estimated 1893.7 acres POUNDS OF ACTIVE INGREDIENT USED LAST YEAR: 0 gallons

PRODUCT NAME: Talon-G
EPA REGISTRATION #: $100-1050 ACTIVE INGREDIENTS: CAS #56073-10-0 @ 0.005% a.i. brodifacoum; each pack weighs 0.0055 lbs or 25 grams TARGET PEST: Norway & Roof rats RATE OF APPLICATION: per label "4-16 bait packs" APPLICATION METHOD: No rodenticides will be pr ovided to citizens for their direct use. Citizens may elect to acquire and use rodenticides on their own.

APPLICATION SITE: Habitats would incl ude urban and residential areas.

POUNDS OF ACTIVE INGREDIENT TO BE USED: estimated 0 lbs

ACRES TO BE TREATED: 0

POUNDS OF ACTIVE INGREDIENT USED LAST YEAR: 0.0003982 lbs

PRODUCT NAME: Contract Super-Size Blox

EPA REGISTRATION: #12455-82 ACTIVE INGREDIENTS: Bromadiolone @ 0.005% per 8 oz block TARGET PEST: Norway and Roof rats RATE OF APPLICATON: per label 1 or 2 bait blocks per placement APPLICATION METHOD: Contrac Blox are primarily used in severe baiting. They may be also used in tamper resistant bait stations for control of severe infestations in areas with no access for children and pets. Placement is always made in a manner that minimizes access of the bait to non-targets wildlife. In sewers, the blocks are secured in place above th e normal water line with wire. Once feeding stops all unc onsumed bait is removed.

APPLICATION SITE: Habitats include urba n and residential areas (primarily in sewers). Not used in areas of special environmental concern.

LBS OF A.I TO BE USED: 0.00153 lbs

ACRES TO BE TREATED: N/A

LBS OF A.I. USED LAST YR: 0.015 lbs

PRODUCT NAME: 5% Skeeter Abate

EPA REGISTRATION: #8329-IL-0 ACTIVE INGREDIENTS: Temephos @ 5%

TARGET PEST: Aedes spp., Ochlerotatus spp., Culex spp., Culiseta spp., Anopheles spp . mosquito larvae RATE OF APPLICATON: 2-10 lbs pe r acre depending upon water quality APPLICATION METHOD: Product is in a gypsum pellet form and will be applied with motorized backpack sprayers or during spot or catch basin treatment applications made with measured spoons. This product is also labeled for pre-treating areas that will breed mosquitoes. APPLICATION SITE: Used in waste tires, some roadside ditches, sewage polluted sites, and as a spot treatment to catch basins and simila r structures. This product will be used primarily

to target Culex spp . mosquitoes and this product is not used in areas of special concern.

LBS OF A.I TO BE USED: estimated 100 lbs45 

### ACRES TO BE TREATED: estimated 10 acres

LBS OF A.I. USED LAST YR: 0 lbs

PRODUCT NAME: AGNIQUE MMF-G

EPA REGISTRATION: #53263-30 ACTIVE INGREDIENTS: Poly (oxy-1,2-ethanediyl),  (C16-20 branched and linear alkyl)-

 -hydroxy) @ 100%

TARGET PEST: Aedes spp., Ochlerotatus spp., Culex spp., Culiseta spp., Anopheles spp . mosquito larvae RATE OF APPLICATON: 11-21.5 lbs/acre (fresh and polluted) APPLICATION METHOD: by ground or aerial applications.

APPLICATION SITE: fresh and brackish waters sites, storm waters structures, polluted waters. This product will not be used in sensitive ecosystems.

LBS OF A.I TO BE USED: estimated 16 lbs

ACRES TO BE TREATED: estimated 2.5 acres

LBS OF A.I. USED LAST YR: 17.17 lbs

PRODUCT NAME: ALTOSID PELLETS WSP

EPA REGISTRATION: #2724-228 ACTIVE INGREDIENTS: (S)-Methoprene: Isopropyl (2E, 4E, 7S)-11-mehtoxy-3,7,11- trimethyl-2-4-dodecadienoate @ 4.25%

TARGET PEST: Aedes spp., Ochlerotatus spp., Culex spp., Culiseta spp., Coquillettidia spp., Anopheles spp . mosquito larvae RATE OF APPLICATON: 1 pouch into 1 catch basi n. For other sites, 1 pouch for up to 135 square feet of surface area. APPLICATION METHOD: by ground, by hand.

APPLICATION SITE: catch basins

LBS OF A.I TO BE USED: 20 lbs

ACRES TO BE TREATED: n/a

LBS OF A.I. USED LAST YR: 0 lbs

PRODUCT NAME: ALTOSID Liquid Larvicide

EPA REGISTRATION: #2724-392 ACTIVE INGREDIENTS: (S)-Methoprene: @ 0.43 lb/gal a.i.

TARGET PEST: Aedes spp., Ochlerotatus spp., Culex spp., Culiseta spp., Coquillettidia spp., Anopheles spp . mosquito larvae RATE OF APPLICATON: 0.5 – 5 gallons of product/acre APPLICATION METHOD: by ground by spray application APPLICATION SITE: mosquito breeding areas

LBS OF A.I TO BE USED: 21.5 lbs

ACRES TO BE TREATED: 10 acres

LBS OF A.I. USED LAST YR: 0 lbs

PRODUCT NAME: V60035 CG/VectoMax CG, V60035 Water Soluable Pouch WSP, VectoMax WSP

EPA REGISTRATION: #73049-429

ACTIVE INGREDIENTS: Bacillus spahaericus Serotype H5a5b, strain 2362 Fermentation Solids, Spores, and Insecticidal Toxins and B. thuringiensis subsp. i sraelensis Serotype H-14, Strain AM65-52, Fermentation Solids, Spores and Insecticidal Toxins @ 7.2%46 

### TARGET PEST: Aedes spp., Ochlerotatus spp., Culex spp., Culiseta spp., Coquillettidia spp., Anopheles spp . mosquito larvae RATE OF APPLICATON: 5-20lbs/acre; 0.5-2lbs/1000 sq. ft for waste tires APPLICATION METHOD: by ground or aerially applied by helicopter APPLICATION SITE: mosquito breeding areas LBS OF A.I TO BE USED: anticipated 90 lbs @ 12.5 lbs/acre ACRES TO BE TREATED: anticipated 100 acres

LBS OF A.I. USED LAST YR: 0 lbs

Document1



### VECTOR CONTROL PESTICIDE USE PLAN

This is a multi-part form. Page three is a Target Pest Information worksheet that must be filled out for each pest for which a treatment is planned during the season. Page four is a Control Agent Worksheet . This information must be supplied for each pesticide product or biological control agent that the district intends to use. Attach additional sheets as needed. A form containing the specified information in another format may b substituted, but, please include all

information indicated on these forms.

District Name:Multnomah County Vector and Nuisance Control

Date:2008



## Applicator Information

Name:Christopher M. Wirth

Address:5235 N. Columbia Blvd.

City/Zip:Portland 97203

Telephone:503-988-3464, ext 222

E-Mail:chris.m.wirth@co.multnomah.or.us

Pesticide Applicator License#:170888

Additional District Information (complete only if there is a contact person who should receive official correspondence in addition to pesticide applicator):

District Contact Name/Title:

District Address:

District City/Zip:

District Phone: FAX:47 

### PUBLIC NOTIFICATION METHOD (check all that apply):

Newspaper Television Radio Mailer

Newsletter Bulletin Board Notices Recorded Telephone Message

Other_website @ www.mchealthinspect.org________________

______________________ ___________________

___________

PUBLIC NOTIFICATION INFORMATION (provide a short description of notification plan, i.e., timing, frequency, languages other than English, etc.): Multnomah County Vector Control (MCVNC) does not normally make routine wide spread/county-wide adulticide applications to areas occupied by people. In the event of mosquito-borne disease or for community livability reasons, aerosol adulticide applications may

be made in areas of human habitation. Public notification would be coordinated with the appropriate stakeholders including County Hea lth Officer and Oregon Department of Human Services. MCVNC has an public notification syst em including specific website information that covers distribution of information to the public a nd media. Larvicide applications are made in areas with little potential for human exposure and by methods that result in minimal drift. Rodenticide placements are made only with si gned consent of the person or agency who occupies, owns, or controls the property. E ducational pamphlets, video tapes, and a slide presentation are available to educate the public, media, schools, and agencies/organizations. When aerial applications of BTI are used to c ontrol floodwater mosquito larvae, MCVNC uses newspapers, radio and te levision to inform the public of our activities. MCVNC has a response plan for West Nile virus that includes a comprehensive communication plan and response guidelines for control. See previous sections of this document for more information on

notification.

Vector Control Pesticide Use Plan: District Name :Multnomah County Vector and Nuisance

Control

Date :see above

TARGET PEST INFORMATION



### IMPORTANT: COMPLETE ONE SHEET FOR EACH TARGET PEST

Target Pest: Check only one target pest per worksheet

.48 Mosquito Larvae Domestic Rat Domestic Fly

Mosquito Adult Other Pest (specify)



### MONITORING METHOD/TREATMENT THRESHOLD
(Indicate the monitoring method and threshold for treatment )

Monitoring Method:Monitoring done by modified random 400 ML dipcount method. Dipping focused on specific habitat types but done randomly within those habitats.

Treatment Threshold:An average of one larvae per dip in site or based on historical data for pre-hatch

treatments.



### EFFICACY SAMPLING
(Indicate which treatments will be follo wed by an evaluation of efficacy, and what method will be used for the evaluation)

All large scale (>1 acre) treatments are followed up with sampling by dipcount or (for methoprene

treatments) with pupal hatch counts to determine effic acy or as needed. A representative number of smaller treatments are also followed up in this fashion.

SURVEILLANCE FOR IMPACTS ON NON-TARGET SPECIES

(List methods used to determine impacts on non-target species.)

Resources severely limit our ability to do extensive monitoring for impacts on non-target insects.

Observations are made of non-target invertebrates found while taking pre and post treatment dipcounts. Materials that appear to cause significant changes in invertebrate fauna are avoided in

areas utilized by wildlife whenever po ssible. See prior sections of th is document on non-target impact methods for more information..

TOTAL NUMBER OF AGENTS (PESTICIDES AND BIOLOGICAL CONTROLS) TO BE USED FOR

CONTROL:= 11+

DISTRICT NAME: Multnomah County Vector and Nuisance Control

DATE: see above49 TARGET PEST INFORMATION

TARGET PEST: CIRCLE ONLY ONE TA RGET PEST PER WORKSHEET

Mosquito Adult

MONITORING METHOD

Surveillance of adults mosquitoes is primarly done in order of most frequently used methods to least frequently used methods includes EVS traps, gravid traps when applicable, light traps and aspiration, sweep nets, landing rate counts, followed up with specimen identification.

TREATMENT THRESHOLD

Application of adulticides to mosquito source areas not inhabited by people are planned when criteria

threshold is breached.

Application of adulticides to mosquito source areas in habited by people will only be treated if a health emergency due to the detection of an arbovirus found present in a vector population in Multnomah County or adjacent or regional areas and specific sur veillance criteria related to specific arbovirus is met and or community livability thresholds are breach ed, MCVNC would initiate an adulticiding control efforts. See previously mentioned policies.

EFFICACY SAMPLING

Adulticiding applications to be evaluated post tr eatment traps (e.g. EVS) and cage tests.

SURVEILLANCE FOR IMPACTS ON NON-TARGET SPECIES

Comprehensive monitoring for effects on non-target insects following adulticide applications is too costly for our program to accomplish. We rely on published studies about these effects when selecting materials and methods. Obvious effects such as bee kills would be noticed during post treatment sampling. See other sections of th is document on non-target surveillanc e methods for more information.

TOTAL NUMBER OF AGENTS (PESTICIDES AND BIOLOGICAL CONTROLS) TO BE USED FOR CONTROL = 5+ various formulations

DISTRICT NAME: Multnomah County Vector and Nuisance Control50 DATE: see above

TARGET PEST INFORMATION

TARGET PEST: CIRCLE ONLY ONE TA RGET PEST PER WORKSHEET

Domestic Rat

MONITORING METHOD

Monitoring is done through citizen complaints , sewer break reports, and visual evidence.

Sewer-related rat problems are tracked by comput er and illustrated in our map info program.

Sewer baiting is targeted at areas with high numbe rs of sewer-related rat pr oblems. MCNVC, through cooperative rodent surveillance work being conducted at Portland State University, anticipates increased information to enhance existing rodent programs in cluding specific species diversity, population density and spatial information of those species found in Multnomah County in 2003-2004.

TREATMENT THRESHOLD

The treatment threshold has been reached when an in spection indicates an active rat infestation or rats have been sighted. Sewer baiting for rats has been co ntracted with the City of Portland. Sewers will be baited prior to any construction on the line, or afte r an investigation by our office identifies the need. Rodenticide placements have been greatly curtailed on private property and only when a short term solution is necessary for rodent control while property owner works to reduce rat attractants simultaneously. An inspection is m ade and advice/repor t and control tools are provided if necessary. If control tools include rodenticides, resident will sign agreement for rodenticide placement and be supplied with a tamper-resistant bait station. Roden ticides provided will be over-the-counter products with full label intact. Rodenticide placement may occur, at the direction and oversight of a MCVNC inspector on public property when necessary when a short term solution is necessary for rodent control while public property owner works to reduce rat attractants simultaneously.

EFFICACY SAMPLING

Applications to sewer systems are a rodenticide labeled specifically for sewer bait placement. All rodenticides used in sewer systems will be wired in place, and monitored approximately every two weeks for bait consumptio n and product shelf-life viability. Consumed bait will be replaced every two weeks, once consumption has stopped, all unconsumed bait will be removed and discared according to label instructions. All sewer systems baited will be ma pped out on a mapping program. All rodenticide placements in other areas of public ownership will be rechecked to assure efficacy and disposition of

excess rodenticide.

SURVEILLANCE FOR IMPACTS ON NON-TARGET SPECIES

We rely on client reports for impacts on non-target animals such as squirrels, pets, etc. Public and private property owners are made aware of the potential effects of rodenticides on non-targets. Bait placements are made to the best of MCVNC ability to reduce/prevent children, pets, and non-target wildlife from accessing the materials. See prior sec tions of this document on non-target surveillance for more information.51 TOTAL NUMBER OF AGENTS (PESTICIDES AND BIOLOGICAL CONTROLS) TO BE USED FOR CONTROL = 2+ various formulations/active ingredients

Vector Control Pesticide Use Plan: District Name: Multnomah County Vector and Nuisance Control

Date: see above

SENSITIVE AREAS AND SPECIES

(Provide a description of sensitive areas. Map(s) that s how sensitive areas, areas to be treated by larviciding and areas to be treated by adulticiding should be on file with ODFW. If new sensitive areas are identified include new maps with this application.)

The term "sensitive area" and its criteria has not yet been defined in context of the State of Oregon Pesticide Use Plan. The following areas are identified for a wide variety of criteria to be considered when making IPM choices as a precautionary approach. MCVNC has taken the lead initiative and is working with various local wildlife managers on identifying areas that may be critical or sensitive for a variety of reason(s). Additionally, MCVNC will track the areas and recommendations by the Terrestrial Ecology Enhancement Strategy draft report 8-22 -07 as it develops. It is noted th at the many of the habitat anchors identified by this group thus far are already included in the MCVNC list of sensitive areas. Additionally, MCVNC has been and will continue to work with Oregon Fish and Wildlife to implement modification when compatible to both public health and local wild life population(s) and ecosystem(s). Some examples of this ongoing work have already been described in other sections of this document. Additional examples include working closely to modify our actions as n ecessary to support the mon itoring and success of the local turtle populations at Sensitive Area #9 for painted turtles, Chrysemys spp. .

Sensitive Area - 1

Sauvie Island Wildlife Management Area

See previously attached maps for location

mosquito control and surveillance according to policies and procedures described above

Sensitive Area - 2

Pittock Bird Sanctuary

See previously attached maps for location

mosquito control and surveillance according to policies and procedures described above

Sensitive Area - 3

Oaks Bottom Wildlife Refuge

See previously attach ed maps for location52 mosquito control and surveillance according to policies and procedures described above

Sensitive Area - 4

Sandy River Gorge

See previously attach ed maps for location

mosquito control and surveillance according to policies and procedures described above

Sensitive Area - 5

Columbia River Gorge National Scenic Area

See previously attached maps for location

mosquito control and surveillance according to policies and procedures described above

Sensitive Area - 6

Forest Park

See previously attach ed maps for location

mosquito control and surveillance according to policies and procedures described above

Sensitive Area - 7

Bull Run Watershed

See previously attach ed maps for location

mosquito control and surveillance according to policies and procedures described above

Sensitive Area - 8

Smith & Bybee Lakes

See previously attach ed maps for location

mosquito control and surveillance according to policies and procedures described above

Sensitive Area - 9

Burlington Bottoms

See previously attach ed maps for location

mosquito control and surveillance according to policies and procedures described above. Specifically, services will be modified for Chrysemys spp.in loca tions identified by Oregon Department of Wildlife by the following methods: 1) decontamination of footgear and any aqueous equipment to avoid pathogens spreading from one wetland to another, 2) flexible control thresholds for Aedes spp and Ochlerotatus spp mosquito species in the designated water bodies with juvenile turtles present; typically through to June 1 st

. Modifications may require some flexibility should adult mosquitoes be above average.53 Sensitive Area – 10

“Fish Habitat”

As regulated by Oregon Department of Fish and Wildlife by ORS 635-100-0130 through ORS 635-100- 0135, all Multnomah County water bodies as described in Federal Register, ESU, September 2, 2005 (70FR52630-52858) for;

 Lower Columbia River Steelhead

 Lower Columbia River Chinook

 Columbia River Chum

 Upper Willamette River Chinook

 Upper Columbia River Spring Chinook

Specifically, a minimum 100-foot buffer will be maintained when applying adulticides by ground ULV or barrier application near fish-bearing waters for the above fish species, according to label, excluding Naled.

EDUCATIONAL ACTIVITIES OF DISTRICT

(Provide a brief description of educational outr each, including programs fo r source control in the community.)54 MCVNC educational outreach efforts combines best practices management with sound science and legal control measures for the prevention and control of mosquito, rat and other pests found in Oregon. MCVNC routinely provides educational presentation on various subject matters including pest biology, pest prevention and control methods, and departmen tal operating practices including intergrated pest management. Presentations are typically given, upon request to local and regional groups such as OHSU nursing students, local and regional city and governmental agencies, and other interested parties in Multnomah County and occassionally other areas of Oregon where overlap of education information messages would benefit State of Oregon residences. Supplemental educational printed and pictorial information is also made available to citizens of Multnomah County on pest biology, pest prevention and control methods and departmental operating practices including intergrated pest management strategies available in multiple languages other than English. All materials are designed to serve Multnomah County residents first but due to MCVNC u nderstanding that many areas of Oregon are underserved by vector agencies, are made available, upon request to any interested party in State of Oregon. MCVNC works in cooperation to routinely evaluate educational messages to ensure appropriate viability of messages to
diverse audiences. Furthermore, MCVNC works with local educational institutions such as PSU, OSU and other professionals to nuture and build in additional expertise in MCVNC programs.



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