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  • APPENDIXF
    RADON CONTROL METHODS

    (The provisions contained in this appendix are not mandatory unless specifically referenced in the adopting ordinance.)

    SECTIONAF101
    SCOPE

    1. a.pCi/L standard for picocuries per liter of radon gas. The U.S. Environmental Protection Agency (EPA) recommends that homes that measure 4 pCi/L and greater be mitigated.

      The EPA and the U.S. Geological Survey have evaluated the radon potential in the United States and have developed a map of radon zones designed to assist building officials in deciding whether radon-resistant features are applicable in new construction.

      The map assigns each of the 3,141 counties in the United States to one of three zones based on radon potential. Each zone designation reflects the average short-term radon measurement that can be expected to be measured in a building without the implementation of radon-control methods. The radon zone designation of highest priority is Zone 1. Table AF101 lists the Zone 1 counties illustrated on the map.

      More detailed information can be obtained from state-specific booklets (EPA-402-R-93-021 through 070) available through State Radon Offices or from EPA Regional Offices.

    FIGURE AF101

    EPA MAP OF RADON ZONES

    TABLE AF101(1)

    HIGH RADON-POTENTIAL (ZONE 1) COUNTIESa

    ALABAMA
    Calhoun
    Clay
    Cleburne
    Colbert
    Coosa
    Franklin
    Jackson
    Lauderdale
    Lawrence
    Limestone
    Madison
    Morgan
    Talladega
    CALIFORNIA
    Santa Barbara
    Ventura
    COLORADO
    Adams
    Arapahoe
    Baca
    Bent
    Boulder
    Chaffee
    Cheyenne
    Clear Creek
    Crowley
    Custer
    Delta
    Denver
    Dolores
    Douglas
    El Paso
    Elbert
    Fremont
    Garfield
    Gilpin
    Grand
    Gunnison
    Huerfano
    Jackson
    Jefferson
    Kiowa
    Kit Carson
    Lake
    Larimer
    Las Animas
    Lincoln
    Logan
    Mesa
    Moffat
    Montezuma
    Montrose
    Morgan
    Otero
    Ouray
    Park
    Phillips
    Pitkin
    Prowers
    Pueblo
    Rio Blanco
    San Miguel
    Summit
    Teller
    Washington
    Weld
    Yuma
    CONNECTICUT
    Fairfield
    Middlesex
    New Haven
    New London
    GEORGIA
    Cobb
    De Kalb
    Fulton
    Gwinnett
    IDAHO
    Benewah
    Blaine
    Boise
    Bonner
    Boundary
    Butte
    Camas
    Clark
    Clearwater
    Custer
    Elmore
    Fremont
    Gooding
    Idaho
    Kootenai
    Latah
    Lemhi
    Shoshone
    Valley
    ILLINOIS
    Adams
    Boone
    Brown
    Bureau
    Calhoun
    Carroll
    Cass
    Champaign
    Coles
    De Kalb
    De Witt
    Douglas
    Edgar
    Ford
    Fulton
    Greene
    Grundy
    Hancock
    Henderson
    Henry
    Iroquois
    Jersey
    Jo Daviess
    Kane
    Kendall
    Knox
    La Salle
    Lee
    Livingston
    Logan
    Macon
    Marshall
    Mason
    McDonough
    McLean
    Menard
    Mercer
    Morgan
    Moultrie
    Ogle
    Peoria
    Piatt
    Pike
    Putnam
    Rock Island
    Sangamon
    Schuyler
    Scott
    Stark
    Stephenson
    Tazewell
    Vermilion
    Warren
    Whiteside
    Winnebago
    Woodford
    INDIANA
    Adams
    Allen
    Bartholomew
    Benton
    Blackford
    Boone
    Carroll
    Cass
    Clark
    Clinton
    De Kalb
    Decatur
    Delaware
    Elkhart
    Fayette
    Fountain
    Fulton
    Grant
    Hamilton
    Hancock
    Harrison
    Hendricks
    Henry
    Howard
    Huntington
    Jay
    Jennings
    Johnson
    Kosciusko
    LaGrange
    Lawrence
    Madison
    Marion
    Marshall
    Miami
    Monroe
    Montgomery
    Noble
    Orange
    Putnam
    Randolph
    Rush
    Scott
    Shelby
    St. Joseph
    Steuben
    Tippecanoe
    Tipton
    Union
    Vermillion
    Wabash
    Warren
    Washington
    Wayne
    Wells
    White
    Whitley
    IOWA
    All Counties
    KANSAS
    Atchison
    Barton
    Brown
    Cheyenne
    Clay
    Cloud
    Decatur
    Dickinson
    Douglas
    Ellis
    Ellsworth
    Finney
    Ford
    Geary
    Gove
    Graham
    Grant
    Gray
    Greeley
    Hamilton
    Haskell
    Hodgeman
    Jackson
    Jewell
    Johnson
    Kearny
    Kingman
    Kiowa
    Lane
    Leavenworth
    Lincoln
    Logan
    Marion
    Marshall
    McPherson
    Meade
    Mitchell
    Nemaha
    Ness
    Norton
    Osborne
    Ottawa
    Pawnee
    Phillips
    Pottawatomie
    Pratt
    Rawlins
    Republic
    Rice
    Riley
    Rooks
    Rush
    Saline
    Scott
    Sheridan
    Sherman
    Smith
    Stanton
    Thomas
    Trego
    Wallace
    Washington
    Wichita
    Wyandotte
    KENTUCKY
    Adair
    Allen
    Barren
    Bourbon
    Boyle
    Bullitt
    Casey
    Clark
    Cumberland
    Fayette
    Franklin
    Green
    Harrison
    Hart
    Jefferson
    Jessamine
    Lincoln
    Marion
    Mercer
    Metcalfe
    Monroe
    Nelson
    Pendleton
    Pulaski
    Robertson
    Russell
    Scott
    Taylor
    Warren
    Woodford
    MAINE
    Androscoggin
    Aroostook
    Cumberland
    Franklin
    Hancock
    Kennebec
    Lincoln
    Oxford
    Penobscot
    Piscataquis
    Somerset
    York
    MARYLAND
    Baltimore
    Calvert
    Carroll
    Frederick
    Harford
    Howard
    Montgomery
    Washington
    MASS.
    Essex
    Middlesex
    Worcester
    MICHIGAN
    Branch
    Calhoun
    Cass
    Hillsdale
    Jackson
    Kalamazoo
    Lenawee
    St. Joseph
    Washtenaw
    MINNESOTA
    Becker
    Big Stone
    Blue Earth
    Brown
    Carver
    Chippewa
    Clay
    Cottonwood
    Dakota
    Dodge
    Douglas
    Faribault
    Fillmore
    Freeborn
    Goodhue
    Grant
    Hennepin
    Houston
    Hubbard
    Jackson
    Kanabec
    Kandiyohi
    Kittson
    Lac Qui Parle
    Le Sueur
    Lincoln
    Lyon
    Mahnomen
    Marshall
    Martin
    McLeod
    Meeker
    Mower
    Murray
    Nicollet
    Nobles
    Norman
    Olmsted
    Otter Tail
    Pennington
    Pipestone
    Polk
    Pope
    Ramsey
    Red Lake
    Redwood
    Renville
    Rice
    Rock
    Roseau
    Scott
    Sherburne
    Sibley
    Stearns
    Steele
    Stevens
    Swift
    Todd
    Traverse
    Wabasha
    Wadena
    Waseca
    Washington
    Watonwan
    Wilkin
    Winona
    Wright
    Yellow Medicine
    MISSOURI
    Andrew
    Atchison
    Buchanan
    Cass
    Clay
    Clinton
    Holt
    Iron
    Jackson
    Nodaway
    Platte
    MONTANA
    Beaverhead
    Big Horn
    Blaine
    Broadwater
    Carbon
    Carter
    Cascade
    Chouteau
    Custer
    Daniels
    Dawson
    Deer Lodge
    Fallon
    Fergus
    Flathead
    Gallatin
    Garfield
    Glacier
    Granite
    Hill
    Jefferson
    Judith Basin
    Lake
    Lewis and Clark
    Madison
    McCone
    Meagher
    Missoula
    Park
    Phillips
    Pondera
    Powder River
    Powell
    Prairie
    Ravalli
    Richland
    Roosevelt
    Rosebud
    Sanders
    Sheridan
    Silver Bow
    Stillwater
    Teton
    Toole
    Valley
    Wibaux
    Yellowstone
    NEBRASKA
    Adams
    Boone
    Boyd
    Burt
    Butler
    Cass
    Cedar
    Clay
    Colfax
    Cuming
    Dakota
    Dixon
    Dodge
    Douglas
    Fillmore
    Franklin
    Frontier
    Furnas
    Gage
    Gosper
    Greeley
    Hamilton
    Harlan
    Hayes
    Hitchcock
    Hurston
    Jefferson
    Johnson
    Kearney
    Knox
    Lancaster
    Madison
    Nance
    Nemaha
    Nuckolls
    Otoe
    Pawnee
    Phelps
    Pierce
    Platte
    Polk
    Red Willow
    Richardson
    Saline
    Sarpy
    Saunders
    Seward
    Stanton
    Thayer
    Washington
    Wayne
    Webster
    York
    NEVADA
    Carson City
    Douglas
    Eureka
    Lander
    Lincoln
    Lyon
    Mineral
    Pershing
    White Pine
    NEW
    HAMPSHIRE
    Carroll
    NEW JERSEY
    Hunterdon
    Mercer
    Monmouth
    Morris
    Somerset
    Sussex
    Warren
    NEW MEXICO
    Bernalillo
    Colfax
    Mora
    Rio Arriba
    San Miguel
    Santa Fe
    Taos
    NEW YORK
    Albany
    Allegany
    Broome
    Cattaraugus
    Cayuga
    Chautauqua
    Chemung
    Chenango
    Columbia
    Cortland
    Delaware
    Dutchess
    Erie
    Genesee
    Greene
    Livingston
    Madison
    Onondaga
    Ontario
    Orange
    Otsego
    Putnam
    Rensselaer
    Schoharie
    Schuyler
    Seneca
    Steuben
    Sullivan
    Tioga
    Tompkins
    Ulster
    Washington
    Wyoming
    Yates
    N. CAROLINA
    Alleghany
    Buncombe
    Cherokee
    Henderson
    Mitchell
    Rockingham
    Transylvania
    Watauga
    N. DAKOTA
    All Counties
    OHIO
    Adams
    Allen
    Ashland
    Auglaize
    Belmont
    Butler
    Carroll
    Champaign
    Clark
    Clinton
    Columbiana
    Coshocton
    Crawford
    Darke
    Delaware
    Fairfield
    Fayette
    Franklin
    Greene
    Guernsey
    Hamilton
    Hancock
    Hardin
    Harrison
    Holmes
    Huron
    Jefferson
    Knox
    Licking
    Logan
    Madison
    Marion
    Mercer
    Miami
    Montgomery
    Morrow
    Muskingum
    Perry
    Pickaway
    Pike
    Preble
    Richland
    Ross
    Seneca
    Shelby
    Stark
    Summit
    Tuscarawas
    Union
    Van Wert
    Warren
    Wayne
    Wyandot
    PENNSYLVANIA
    Adams
    Allegheny
    Armstrong
    Beaver
    Bedford
    Berks
    Blair
    Bradford
    Bucks
    Butler
    Cameron
    Carbon
    Centre
    Chester
    Clarion
    Clearfield
    Clinton
    Columbia
    Cumberland
    Dauphin
    Delaware
    Franklin
    Fulton
    Huntingdon
    Indiana
    Juniata
    Lackawanna
    Lancaster
    Lebanon
    Lehigh
    Luzerne
    Lycoming
    Mifflin
    Monroe
    Montgomery
    Montour
    Northampton
    Northumberland
    Perry
    Schuylkill
    Snyder
    Sullivan
    Susquehanna
    Tioga
    Union
    Venango
    Westmoreland
    Wyoming
    York
    RHODE ISLAND
    Kent
    Washington
    S. CAROLINA
    Greenville
    S. DAKOTA
    Aurora
    Beadle
    Bon Homme
    Brookings
    Brown
    Brule
    Buffalo
    Campbell
    Charles Mix
    Clark
    Clay
    Codington
    Corson
    Davison
    Day
    Deuel
    Douglas
    Edmunds
    Faulk
    Grant
    Hamlin
    Hand
    Hanson
    Hughes
    Hutchinson
    Hyde
    Jerauld
    Kingsbury
    Lake
    Lincoln
    Lyman
    Marshall
    McCook
    McPherson
    Miner
    Minnehaha
    Moody
    Perkins
    Potter
    Roberts
    Sanborn
    Spink
    Stanley
    Sully
    Turner
    Union
    Walworth
    Yankton
    TENNESEE
    Anderson
    Bedford
    Blount
    Bradley
    Claiborne
    Davidson
    Giles
    Grainger
    Greene
    Hamblen
    Hancock
    Hawkins
    Hickman
    Humphreys
    Jackson
    Jefferson
    Knox
    Lawrence
    Lewis
    Lincoln
    Loudon
    Marshall
    Maury
    McMinn
    Meigs
    Monroe
    Moore
    Perry
    Roane
    Rutherford
    Smith
    Sullivan
    Trousdale
    Union
    Washington
    Wayne
    Williamson
    Wilson
    UTAH
    Carbon
    Duchesne
    Grand
    Piute
    Sanpete
    Sevier
    Uintah
    VIRGINIA
    Alleghany
    Amelia
    Appomattox
    Augusta
    Bath
    Bland
    Botetourt
    Bristol
    Brunswick
    Buckingham
    Buena Vista
    Campbell
    Chesterfield
    Clarke
    Clifton Forge
    Covington
    Craig
    Cumberland
    Danville
    Dinwiddie
    Fairfax
    Falls Church
    Fluvanna
    Frederick
    Fredericksburg
    Giles
    Goochland
    Harrisonburg
    Henry
    Highland
    Lee
    Lexington
    Louisa
    Martinsville
    Montgomery
    Nottoway
    Orange
    Page
    Patrick
    Pittsylvania
    Powhatan
    Pulaski
    Radford
    Roanoke
    Rockbridge
    Rockingham
    Russell
    Salem
    Scott
    Shenandoah
    Smyth
    Spotsylvania
    Stafford
    Staunton
    Tazewell
    Warren
    Washington
    Waynesboro
    Winchester
    Wythe
    WASHINGTON
    Clark
    Ferry
    Okanogan
    Pend Oreille
    Skamania
    Spokane
    Stevens
    W. VIRGINIA
    Berkeley
    Brooke
    Grant
    Greenbrier
    Hampshire
    Hancock
    Hardy
    Jefferson
    Marshall
    Mercer
    Mineral
    Monongalia
    Monroe
    Morgan
    Ohio
    Pendleton
    Pocahontas
    Preston
    Summers
    Wetzel
    WISCONSIN
    Buffalo
    Crawford
    Dane
    Dodge
    Door
    Fond du Lac
    Grant
    Green
    Green Lake
    Iowa
    Jefferson
    Lafayette
    Langlade
    Marathon
    Menominee
    Pepin
    Pierce
    Portage
    Richland
    Rock
    Shawano
    St. Croix
    Vernon
    Walworth
    Washington
    Waukesha
    Waupaca
    Wood
    WYOMING
    Albany
    Big Horn
    Campbell
    Carbon
    Converse
    Crook
    Fremont
    Goshen
    Hot Springs
    Johnson
    Laramie
    Lincoln
    Natrona
    Niobrara
    Park
    Sheridan
    Sublette
    Sweetwater
    Teton
    Uinta
    Washakie
    1. a.The EPA recommends that this county listing be supplemented with other available State and local data to further understand the radon potential of a Zone 1 area.

    AF101.1 General.

    This appendix contains requirements for new construction in jurisdictions where radon-resistant construction is required.

    Inclusion of this appendix by jurisdictions shall be determined through the use of locally available data or determination of Zone 1 designation in Figure AF101 and Table AF101(1).