WEARMethodologyMarlena(Marty)BrewerADECSolidWasteProgram

January20,2017

ProjectOverview• FundingthroughCoastalImpactAssistance(CIAP)

• 4-yearproject

• Assess,inventory,prioritizelandfills,contaminatedsites&otherenvironmental

concernsites(tankfarms,cityshops,wastestagingareas,etc.)

• Alaska’snorthern&westerncoastline,AleutianIslands&rivercommunities(300

milesfromcoast)

• Sitesrankedonpotentialerosion&contaminantrisks

Inspected716sites

in124communities

RiskCalculationsErosionRisk

• 2009AlaskaBaselineErosionAssessmentUSACE,AlaskaDistrict

• Desktopassessment

• Fieldmeasurements&observations

Contaminant Risk

• Siteassessment

• Toxicology

• Exposurepathways

• Human&ecologicalriskassessment

DataCollected

• Siteinformation

• Sizeofsite

• Yearsofoperation

• Possiblecontaminants

• Drinkingwaterprotectionzone

• Distancetocriticalhabitat

• Distancetoresidences

• Distancetostressedhabitat

• Yearsuntilerosion

• Erosiontype

• Erosionfactors

• Erosionsymptoms

• SoilClass

• Mitigationefforts

WEAR ProjectSite Information Form

Inspectors :_

Date:_Community

Site name

Site Type Land fi l l , Tan k Farm, Drum Dump , M i l i tary, M in in g

Status Active/Open , Covered /C lo sed ,

Removed /Remed iated

LocationLatitude: Longitude: GPS Point ID's :

Description:

Approx.Size (acres ): Years Operated:

Possible Contaminants: Mun icip al Waste, Fuels, M in in gWaste,C&D/Asbesto s, M i l i tary

Waste, In du strial Waste,Other

Distance to (ft):

Active Eros ion: ClosestWater: Name: Anadromous waterbody?

Subs is tence Area: Critical Habitat: USFW

Res idences : StressedHabitat:

Exposure Pathways: In h alation , Direct Con tact, Wi ld li fe, Other

Erosion:Type: Waves, Cu rren ts, Ice, Heat,Wind ,P recip i tation , Seepage

Factors : Tid es, Sto rm Su rge, Flood in g, P ermafro st, Human In flu en ced , Other

Symptoms: Sl id es, Undercu ttin g, Scarp s, Expo sed Permafro st, Roo t Expo su re/Fal len Trees, WasteExpo sed , IceGougin g, Other

NRCS Soil Class ification:

Silt% Clay % Cobble % Organics %

Sand% Gravel % Boulder % Loam%

Eros ionRate: Eros ionRate QA: Repo rted , Calcu lated , BEA Calcu lated

Current Erosion Mitigation Efforts :

Drinking Water:Is the site in adrinking water protection area?IfYes:1° Source Name: 2° Source Name:

Type: Type: Su rface Water, Groundwater

Treatment: Treatment: Fi l tration , UV, Ch lo rination ,ReverseOsmosis, Nano fi l tration

Well Depth(ft.): Protection Zone: ZoneA, ZoneB , ZoneC , ZoneE, ZoneF

IfNo:Distance toDrinking WaterProtection Area: Upgrad ien t o r Downgrad ien t

ScoringWeightingfactorsforrelativeimportance•1- important•2– moreimportant•3– mostimportant

Multiplierscorrespondingtorelativerisk•Higher#=higherpotentialrisk

WeightingFactorxMultiplier=Score

Weight Multiplier

CharacteristicsConsiderations&References1-important;2-more;3-

most

Higher#correspondstohigherrisk

PossibleScore

WEARStatus 3Removed 0 Wasteremoved 0

Closed/Covered 2 ClosedandcoveredNolongeraccumulatingwastebutallwasteremains 6

Inactive 3leftinplace;allwasteremains;potentialresponsibleparty 9

Abandoned 3Leftinplace;allwasteremains;noresponsibleparty

Nolongeraccumulatingwaste,nocover,maintenance,etc. 9

Active/open 4 Activelyaccumulatingwaste Increasingwaste 12Size 3Small 1 Approximately0-1acre Small,limitedwaste 3Med 2 >1acre,but<5acres Minimalwaste 6

PossibleContaminants 3

Burning 1 BurningofwasteatanypointintimeAirqualityissue&formationofhazardousash 3

Fuels 1 Fuels(gasoline,diesel,heatingfuel) Based uponrelativetoxicityofsuspectedcontaminants

3

C&D/Asbestos 2Demolitiondebrispresumablycontainingasbestos 6

MunicipalWaste 3 Householdwaste 9Sewage 3 Humanwaste 9MiningWaste 4 Metals,acidgeneratingrock(AGR) 12IndustrialWaste 5 Mixedwastes, hazwaste,fuels 15MilitaryWaste 6 Militarywaste,mixedwastes,hazwaste,fuels 18

SolidWasteInformationSystem(SWIMS)

SiteRankings

•716totalsitesassessed

•5erodedduringprojecttimeframe

•711siteswerescored

•605sitesexcludedlikelytoerode>50years

•106sitesleftforfinalranking

•20sitesinupper25%forbotherosion&contaminantrisk

HighPrioritySites

• AlakanukOldBIASchool• AlakanukSouthSideDumpSite• Chevak CompanyCorporationTankFarm• Chevak FormerAVECTankFarm• Chevak FormerCityTankFarm• Chevak OldRiverLandfill• DillinghamIHSHospitalSite• EmmonakLandfill• Golovin FishProcessingPlant• Kalskag ConsolidatedTankFarm

• Kotlik Landfill• Kotlik LYSDFormerTankFarm• Napakiak CorporationTankFarm• Napakiak SchoolTankFarm• NelsonLagoonLandfill• Newtok BackhaulStagingArea• Newtok UPCGeneratorBuilding• Nunapitchuk OldElementarySchoolTankFarm• Oscarville SchoolTankFarm• ShagelukCityTankFarm

DillinghamIHSHospitalSite• IHSKanaknak Hospital,oldhospitallandfill,andmultiplefuel-contaminatedsites

• Multipletypesofcontaminants

• >50acresitealongNushagak River

• Oldlandfillwasteexposedbyerosion

• Seeps&stressedvegetationnoted

• Locatedwithincriticalhabitatarea

• Silt&claysoils

• Erosionrateof1ft/year

• Activeerosionnoted

• Noerosionmitigationefforts

NushagakRiverDillingham

IHSHospitalSite

Oscarville SchoolTankFarm

• Store28,000gallonsheatingfuel

• 120ftfromschool,165ftfromresidences,790ft

fromsubsistencefishingarea

• Drinkingwaterprotectionzoneforschool’s

watersupply

• Xylenesindrinkingwater

• Erosionrateof3ft/year

• Siltriverbank

Tuntutuliak - RiverbankErosion2012

Alakanuk - RiverbankErosion2014

Nunam Iqua - ShorelineErosion2014

Wainwright- ShorelineErosionandRiprapInstallation2013

http://dec.alaska.gov/eh/sw/wear.html