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  • Radon Potential Zone Map for Southern Los Angeles … POTENTIAL ZONE MAP FOR SOUTHERN CALIFORNIA GEOLOGICAL SURVEY LOS ANGELES COUNTY, CALIFORNIA JOHN G. PARRISH, PhD., STATE GEOLOGIST
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60E 60E 60E 60E 60E 110N 110N 110N 110N 110N 110N 110N 110N 110N 605 605 10 210 60E 60E 60E 60E 60E 60E 60E 60E 60E 60E 60E 60E 60E 60E 60E 60E 60E 60E 60E 60E 60E 60E 60E 60E 60E 60E 60E 60E 60E 60E 60E 60E 60E 60E 60E 60E 5 30E 30E 30E 30E 30E 30E 30E 30E 30E 10 210 57 57 57 57 57 57 57 57 57 57N 57N 57N 57N 57N 57N 57N 57N 57N 57 57 57 57 57 57 57 57 57 60E 60E 60E 60E 60E 60E 60E 60E 60E 57N 57N 57N 57N 57N 57N 57N 57N 57N v v v v v v v v v v v v v v Hacienda Heights Hacienda Heights Hacienda Heights Hacienda Heights Hacienda Heights Hacienda Heights Hacienda Heights Hacienda Heights Hacienda Heights Diamond Diamond Diamond Diamond Diamond Diamond Diamond Diamond Diamond Bar Bar Bar Bar Bar Bar Bar Bar Bar Pico Rivera Pico Rivera Pico Rivera Pico Rivera Pico Rivera Pico Rivera Pico Rivera Pico Rivera Pico Rivera Rowland Rowland Rowland Rowland Rowland Rowland Rowland Rowland Rowland Heights Heights Heights Heights Heights Heights Heights Heights Heights Walnut Walnut Walnut Walnut Walnut Walnut Walnut Walnut Walnut Westlake Village Westlake Village Westlake Village Westlake Village Westlake Village Westlake Village Westlake Village Westlake Village Westlake Village West Hollywood West Hollywood West Hollywood West Hollywood West Hollywood West Hollywood West Hollywood West Hollywood West Hollywood Beverly Hills Beverly Hills Beverly Hills Beverly Hills Beverly Hills Beverly Hills Beverly Hills Beverly Hills Beverly Hills Calabasas Calabasas Calabasas Calabasas Calabasas Calabasas Calabasas Calabasas Calabasas Agoura Hills Agoura Hills Agoura Hills Agoura Hills Agoura Hills Agoura Hills Agoura Hills Agoura Hills Agoura Hills Burbank Burbank Burbank Burbank Burbank Burbank Burbank Burbank Burbank Malibu Malibu Malibu Malibu Malibu Malibu Malibu Malibu Malibu Culver City Culver City Culver City Culver City Culver City Culver City Culver City Culver City Culver City Los Angeles Los Angeles Los Angeles Los Angeles Los Angeles Los Angeles Los Angeles Los Angeles Los Angeles Santa Monica Santa Monica Santa Monica Santa Monica Santa Monica Santa Monica Santa Monica Santa Monica Santa Monica El Segundo El Segundo El Segundo El Segundo El Segundo El Segundo El Segundo El Segundo El Segundo Alhambra Alhambra Alhambra Alhambra Alhambra Alhambra Alhambra Alhambra Alhambra San Gabriel San Gabriel San Gabriel San Gabriel San Gabriel San Gabriel San Gabriel San Gabriel San Gabriel East East East East East East East East East Los Angeles Los Angeles Los Angeles Los Angeles Los Angeles Los Angeles Los Angeles Los Angeles Los Angeles Montebello Montebello Montebello Montebello Montebello Montebello Montebello Montebello Montebello South South South South South South South South South San Gabriel San Gabriel San Gabriel San Gabriel San Gabriel San Gabriel San Gabriel San Gabriel San Gabriel Monterey Park Monterey Park Monterey Park Monterey Park Monterey Park Monterey Park Monterey Park Monterey Park Monterey Park San Marino San Marino San Marino San Marino San Marino San Marino San Marino San Marino San Marino South South South South South South South South South Pasadena Pasadena Pasadena Pasadena Pasadena Pasadena Pasadena Pasadena Pasadena Glendale Glendale Glendale Glendale Glendale Glendale Glendale Glendale Glendale Pasadena Pasadena Pasadena Pasadena Pasadena Pasadena Pasadena Pasadena Pasadena South El Monte South El Monte South El Monte South El Monte South El Monte South El Monte South El Monte South El Monte South El Monte El Monte El Monte El Monte El Monte El Monte El Monte El Monte El Monte El Monte Rosemead Rosemead Rosemead Rosemead Rosemead Rosemead Rosemead Rosemead Rosemead Baldwin Park Baldwin Park Baldwin Park Baldwin Park Baldwin Park Baldwin Park Baldwin Park Baldwin Park Baldwin Park Irwindale Irwindale Irwindale Irwindale Irwindale Irwindale Irwindale Irwindale Irwindale West Covina West Covina West Covina West Covina West Covina West Covina West Covina West Covina West Covina San Dimas San Dimas San Dimas San Dimas San Dimas San Dimas San Dimas San Dimas San Dimas Claremont Claremont Claremont Claremont Claremont Claremont Claremont Claremont Claremont Duarte Duarte Duarte Duarte Duarte Duarte Duarte Duarte Duarte La Canada Flintridge La Canada Flintridge La Canada Flintridge La Canada Flintridge La Canada Flintridge La Canada Flintridge La Canada Flintridge La Canada Flintridge La Canada Flintridge Lynwood Lynwood Lynwood Lynwood Lynwood Lynwood Lynwood Lynwood Lynwood Santa Fe Springs Santa Fe Springs Santa Fe Springs Santa Fe Springs Santa Fe Springs Santa Fe Springs Santa Fe Springs Santa Fe Springs Santa Fe Springs South Gate South Gate South Gate South Gate South Gate South Gate South Gate South Gate South Gate Downey Downey Downey Downey Downey Downey Downey Downey Downey La Habra Heights La Habra Heights La Habra Heights La Habra Heights La Habra Heights La Habra Heights La Habra Heights La Habra Heights La Habra Heights Cerritos Cerritos Cerritos Cerritos Cerritos Cerritos Cerritos Cerritos Cerritos Redondo Beach Redondo Beach Redondo Beach Redondo Beach Redondo Beach Redondo Beach Redondo Beach Redondo Beach Redondo Beach Palos Verdes Palos Verdes Palos Verdes Palos Verdes Palos Verdes Palos Verdes Palos Verdes Palos Verdes Palos Verdes Estates Estates Estates Estates Estates Estates Estates Estates Estates Long Beach Long Beach Long Beach Long Beach Long Beach Long Beach Long Beach Long Beach Long Beach Rolling Hills Rolling Hills Rolling Hills Rolling Hills Rolling Hills Rolling Hills Rolling Hills Rolling Hills Rolling Hills Rancho Palos Verdes Rancho Palos Verdes Rancho Palos Verdes Rancho Palos Verdes Rancho Palos Verdes Rancho Palos Verdes Rancho Palos Verdes Rancho Palos Verdes Rancho Palos Verdes Santa Clarita Santa Clarita Santa Clarita Santa Clarita Santa Clarita Santa Clarita Santa Clarita Santa Clarita Santa Clarita Manhattan Beach Manhattan Beach Manhattan Beach Manhattan Beach Manhattan Beach Manhattan Beach Manhattan Beach Manhattan Beach Manhattan Beach La Crescenta- La Crescenta- La Crescenta- La Crescenta- La Crescenta- La Crescenta- La Crescenta- La Crescenta- La Crescenta- Montrose Montrose Montrose Montrose Montrose Montrose Montrose Montrose Montrose Van Nuys Airport Van Nuys Airport Van Nuys Airport Van Nuys Airport Van Nuys Airport Van Nuys Airport Van Nuys Airport Van Nuys Airport Van Nuys Airport Los Angeles International Airport Los Angeles International Airport Los Angeles International Airport Los Angeles International Airport Los Angeles International Airport Los Angeles International Airport Los Angeles International Airport Los Angeles International Airport Los Angeles International Airport Topanga State Park Topanga State Park Topanga State Park Topanga State Park Topanga State Park Topanga State Park Topanga State Park Topanga State Park Topanga State Park Leo Carrillo Leo Carrillo Leo Carrillo Leo Carrillo Leo Carrillo Leo Carrillo Leo Carrillo Leo Carrillo Leo Carrillo State Beach State Beach State Beach State Beach State Beach State Beach State Beach State Beach State Beach Santa Monica Mountains NRA Santa Monica Mountains NRA Santa Monica Mountains NRA Santa Monica Mountains NRA Santa Monica Mountains NRA Santa Monica Mountains NRA Santa Monica Mountains NRA Santa Monica Mountains NRA Santa Monica Mountains NRA Griffith Park Griffith Park Griffith Park Griffith Park Griffith Park Griffith Park Griffith Park Griffith Park Griffith Park Ventura County Ventura County Ventura County Ventura County Ventura County Ventura County Ventura County Ventura County Ventura County San Bernardino County San Bernardino County San Bernardino County San Bernardino County San Bernardino County San Bernardino County San Bernardino County San Bernardino County San Bernardino County Orange County Orange County Orange County Orange County Orange County Orange County Orange County Orange County Orange County A n g e l e s N a t i o n a l F o r e s t A n g e l e s N a t i o n a l F o r e s t A n g e l e s N a t i o n a l F o r e s t A n g e l e s N a t i o n a l F o r e s t A n g e l e s N a t i o n a l F o r e s t A n g e l e s N a t i o n a l F o r e s t A n g e l e s N a t i o n a l F o r e s t A n g e l e s N a t i o n a l F o r e s t A n g e l e s N a t i o n a l F o r e s t A n g e l e s N a t i o n a l F o r e s t A n g e l e s N a t i o n a l F o r e s t A n g e l e s N a t i o n a l F o r e s t A n g e l e s N a t i o n a l F o r e s t A n g e l e s N a t i o n a l F o r e s t A n g e l e s N a t i o n a l F o r e s t A n g e l e s N a t i o n a l F o r e s t A n g e l e s N a t i o n a l F o r e s t A n g e l e s N a t i o n a l F o r e s t Harbor Lake Harbor Lake Harbor Lake Harbor Lake Harbor Lake Harbor Lake Harbor Lake Harbor Lake Harbor Lake Live Oak Live Oak Live Oak Live Oak Live Oak Live Oak Live Oak Live Oak Live Oak Reservoir Reservoir Reservoir Reservoir Reservoir Reservoir Reservoir Reservoir Reservoir Thompson Creek Thompson Creek Thompson Creek Thompson Creek Thompson Creek Thompson Creek Thompson Creek Thompson Creek Thompson Creek Reservoir Reservoir Reservoir Reservoir Reservoir Reservoir Reservoir Reservoir Reservoir Puddingstone Reservoir Puddingstone Reservoir Puddingstone Reservoir Puddingstone Reservoir Puddingstone Reservoir Puddingstone Reservoir Puddingstone Reservoir Puddingstone Reservoir Puddingstone Reservoir Herbert Herbert Herbert Herbert Herbert Herbert Herbert Herbert Herbert Legg Lake Legg Lake Legg Lake Legg Lake Legg Lake Legg Lake Legg Lake Legg Lake Legg Lake S an Ga br i e l R i v e r S an Ga br i e l R i v e r S an Ga br i e l R i v e r S an Ga br i e l R i v e r S an Ga br i e l R i v e r S an Ga br i e l R i v e r S an Ga br i e l R i v e r S an Ga br i e l R i v e r S an Ga br i e l R i v e r Malibu Lake Malibu Lake Malibu Lake Malibu Lake Malibu Lake Malibu Lake Malibu Lake Malibu Lake Malibu Lake Westlake Reservoir Westlake Reservoir Westlake Reservoir Westlake Reservoir Westlake Reservoir Westlake Reservoir Westlake Reservoir Westlake Reservoir Westlake Reservoir Lake Calabasas Lake Calabasas Lake Calabasas Lake Calabasas Lake Calabasas Lake Calabasas Lake Calabasas Lake Calabasas Lake Calabasas Encino Reservoir Encino Reservoir Encino Reservoir Encino Reservoir Encino Reservoir Encino Reservoir Encino Reservoir Encino Reservoir Encino Reservoir Stone Canyon Stone Canyon Stone Canyon Stone Canyon Stone Canyon Stone Canyon Stone Canyon Stone Canyon Stone Canyon Reservoir Reservoir Reservoir Reservoir Reservoir Reservoir Reservoir Reservoir Reservoir Hansen Dam Hansen Dam Hansen Dam Hansen Dam Hansen Dam Hansen Dam Hansen Dam Hansen Dam Hansen Dam Flood Control Flood Control Flood Control Flood Control Flood Control Flood Control Flood Control Flood Control Flood Control Basin Basin Basin Basin Basin Basin Basin Basin Basin Upper Van Upper Van Upper Van Upper Van Upper Van Upper Van Upper Van Upper Van Upper Van Norman Lake Norman Lake Norman Lake Norman Lake Norman Lake Norman Lake Norman Lake Norman Lake Norman Lake Hollywood Reservoir Hollywood Reservoir Hollywood Reservoir Hollywood Reservoir Hollywood Reservoir Hollywood Reservoir Hollywood Reservoir Hollywood Reservoir Hollywood Reservoir Los A nge l e s Riv er Los A nge l e s Riv er Los A nge l e s Riv er Los A nge l e s Riv er Los A nge l e s Riv er Los A nge l e s Riv er Los A nge l e s Riv er Los A nge l e s Riv er Los A nge l e s Riv er R io Ho n d o R io Ho n d o R io Ho n d o R io Ho n d o R io Ho n d o R io Ho n d o R io Ho n d o R io Ho n d o R io Ho n d o Devils Gate Devils Gate Devils Gate Devils Gate Devils Gate Devils Gate Devils Gate Devils Gate Devils Gate Reservoir Reservoir Reservoir Reservoir Reservoir Reservoir Reservoir Reservoir Reservoir Cogswell Reservoir Cogswell Reservoir Cogswell Reservoir Cogswell Reservoir Cogswell Reservoir Cogswell Reservoir Cogswell Reservoir Cogswell Reservoir Cogswell Reservoir Big Tujunga Dam Big Tujunga Dam Big Tujunga Dam Big Tujunga Dam Big Tujunga Dam Big Tujunga Dam Big Tujunga Dam Big Tujunga Dam Big Tujunga Dam 118° 45' 00" 118° 45' 00" 118° 45' 00" 118° 45' 00" 118° 45' 00" 118° 45' 00" 118° 45' 00" 118° 45' 00" 118° 45' 00" 34° 15' 00" 34° 15' 00" 34° 15' 00" 34° 15' 00" 34° 15' 00" 34° 15' 00" 34° 15' 00" 34° 15' 00" 34° 15' 00" 118° 30' 00" 118° 30' 00" 118° 30' 00" 118° 30' 00" 118° 30' 00" 118° 30' 00" 118° 30' 00" 118° 30' 00" 118° 30' 00" 34° 00' 00" 34° 00' 00" 34° 00' 00" 34° 00' 00" 34° 00' 00" 34° 00' 00" 34° 00' 00" 34° 00' 00" 34° 00' 00" 118° 45' 00" 118° 45' 00" 118° 45' 00" 118° 45' 00" 118° 45' 00" 118° 45' 00" 118° 45' 00" 118° 45' 00" 118° 45' 00" 34° 00' 00" 34° 00' 00" 34° 00' 00" 34° 00' 00" 34° 00' 00" 34° 00' 00" 34° 00' 00" 34° 00' 00" 34° 00' 00" 117° 45' 00" 117° 45' 00" 117° 45' 00" 117° 45' 00" 117° 45' 00" 117° 45' 00" 117° 45' 00" 117° 45' 00" 117° 45' 00" 34° 00' 00" 34° 00' 00" 34° 00' 00" 34° 00' 00" 34° 00' 00" 34° 00' 00" 34° 00' 00" 34° 00' 00" 34° 00' 00" 117° 45' 00" 117° 45' 00" 117° 45' 00" 117° 45' 00" 117° 45' 00" 117° 45' 00" 117° 45' 00" 117° 45' 00" 117° 45' 00" 34° 15' 00" 34° 15' 00" 34° 15' 00" 34° 15' 00" 34° 15' 00" 34° 15' 00" 34° 15' 00" 34° 15' 00" 34° 15' 00" 118° 00' 00" 118° 00' 00" 118° 00' 00" 118° 00' 00" 118° 00' 00" 118° 00' 00" 118° 00' 00" 118° 00' 00" 118° 00' 00" 34° 15' 00" 34° 15' 00" 34° 15' 00" 34° 15' 00" 34° 15' 00" 34° 15' 00" 34° 15' 00" 34° 15' 00" 34° 15' 00" 118° 00' 00" 118° 00' 00" 118° 00' 00" 118° 00' 00" 118° 00' 00" 118° 00' 00" 118° 00' 00" 118° 00' 00" 118° 00' 00" 33° 45' 00" 33° 45' 00" 33° 45' 00" 33° 45' 00" 33° 45' 00" 33° 45' 00" 33° 45' 00" 33° 45' 00" 33° 45' 00" 118° 30' 00" 118° 30' 00" 118° 30' 00" 118° 30' 00" 118° 30' 00" 118° 30' 00" 118° 30' 00" 118° 30' 00" 118° 30' 00" 33° 45' 00" 33° 45' 00" 33° 45' 00" 33° 45' 00" 33° 45' 00" 33° 45' 00" 33° 45' 00" 33° 45' 00" 33° 45' 00" 117° 45' 00" 117° 45' 00" 117° 45' 00" 117° 45' 00" 117° 45' 00" 117° 45' 00" 117° 45' 00" 117° 45' 00" 117° 45' 00" 33° 45' 00" 33° 45' 00" 33° 45' 00" 33° 45' 00" 33° 45' 00" 33° 45' 00" 33° 45' 00" 33° 45' 00" 33° 45' 00" Altadena Altadena Altadena Altadena Altadena Altadena Altadena Altadena Altadena Arcadia Arcadia Arcadia Arcadia Arcadia Arcadia Arcadia Arcadia Arcadia Artesia Artesia Artesia Artesia Artesia Artesia Artesia Artesia Artesia Azusa Azusa Azusa Azusa Azusa Azusa Azusa Azusa Azusa Bell Bell Bell Bell Bell Bell Bell Bell Bell Bellflower Bellflower Bellflower Bellflower Bellflower Bellflower Bellflower Bellflower Bellflower Bell Gardens Bell Gardens Bell Gardens Bell Gardens Bell Gardens Bell Gardens Bell Gardens Bell Gardens Bell Gardens Bradbury Bradbury Bradbury Bradbury Bradbury Bradbury Bradbury Bradbury Bradbury Carson Carson Carson Carson Carson Carson Carson Carson Carson Citrus Citrus Citrus Citrus Citrus Citrus Citrus Citrus Citrus Commerce Commerce Commerce Commerce Commerce Commerce Commerce Commerce Commerce Compton Compton Compton Compton Compton Compton Compton Compton Compton Covina Covina Covina Covina Covina Covina Covina Covina Covina Cudahy Cudahy Cudahy Cudahy Cudahy Cudahy Cudahy Cudahy Cudahy Gardena Gardena Gardena Gardena Gardena Gardena Gardena Gardena Gardena Glendora Glendora Glendora Glendora Glendora Glendora Glendora Glendora Glendora Hawthorne Hawthorne Hawthorne Hawthorne Hawthorne Hawthorne Hawthorne Hawthorne Hawthorne Hermosa Beach Hermosa Beach Hermosa Beach Hermosa Beach Hermosa Beach Hermosa Beach Hermosa Beach Hermosa Beach Hermosa Beach Hidden Hills Hidden Hills Hidden Hills Hidden Hills Hidden Hills Hidden Hills Hidden Hills Hidden Hills Hidden Hills Huntington Park Huntington Park Huntington Park Huntington Park Huntington Park Huntington Park Huntington Park Huntington Park Huntington Park Industry Industry Industry Industry Industry Industry Industry Industry Industry Inglewood Inglewood Inglewood Inglewood Inglewood Inglewood Inglewood Inglewood Inglewood Lakewood Lakewood Lakewood Lakewood Lakewood Lakewood Lakewood Lakewood Lakewood La Mirada La Mirada La Mirada La Mirada La Mirada La Mirada La Mirada La Mirada La Mirada La Puente La Puente La Puente La Puente La Puente La Puente La Puente La Puente La Puente La Verne La Verne La Verne La Verne La Verne La Verne La Verne La Verne La Verne Lomita Lomita Lomita Lomita Lomita Lomita Lomita Lomita Lomita Marina del Rey Marina del Rey Marina del Rey Marina del Rey Marina del Rey Marina del Rey Marina del Rey Marina del Rey Marina del Rey Maywood Maywood Maywood Maywood Maywood Maywood Maywood Maywood Maywood Monrovia Monrovia Monrovia Monrovia Monrovia Monrovia Monrovia Monrovia Monrovia Norwalk Norwalk Norwalk Norwalk Norwalk Norwalk Norwalk Norwalk Norwalk Paramount Paramount Paramount Paramount Paramount Paramount Paramount Paramount Paramount Pomona Pomona Pomona Pomona Pomona Pomona Pomona Pomona Pomona San Fernando San Fernando San Fernando San Fernando San Fernando San Fernando San Fernando San Fernando San Fernando Sierra Madre Sierra Madre Sierra Madre Sierra Madre Sierra Madre Sierra Madre Sierra Madre Sierra Madre Sierra Madre Signal Hill Signal Hill Signal Hill Signal Hill Signal Hill Signal Hill Signal Hill Signal Hill Signal Hill South Whittier South Whittier South Whittier South Whittier South Whittier South Whittier South Whittier South Whittier South Whittier Temple City Temple City Temple City Temple City Temple City Temple City Temple City Temple City Temple City Torrance Torrance Torrance Torrance Torrance Torrance Torrance Torrance Torrance Vernon Vernon Vernon Vernon Vernon Vernon Vernon Vernon Vernon Walnut Park Walnut Park Walnut Park Walnut Park Walnut Park Walnut Park Walnut Park Walnut Park Walnut Park West Compton West Compton West Compton West Compton West Compton West Compton West Compton West Compton West Compton Whittier Whittier Whittier Whittier Whittier Whittier Whittier Whittier Whittier Willowbrook Willowbrook Willowbrook Willowbrook Willowbrook Willowbrook Willowbrook Willowbrook Willowbrook RADON POTENTIAL ZONE MAP FOR SOUTHERN LOS ANGELES COUNTY, CALIFORNIA CALIFORNIA GEOLOGICAL SURVEY JOHN G. PARRISH, PhD., STATE GEOLOGIST Radon Potential Zone Map for Southern Los Angeles County, California Ron Churchill January, 2005 A digital version of the radon zone location layers is available from the California Department of Conservation, California Geological Survey, 801 K Street, MS 08-38, Sacramento, CA 95814-3531. Base map derived from U.S. Census Bureau, 2000 TIGER Data. Copyright © 2005 by the California Department of Conservation, California Geological Survey. All rights reserved. No part of this publication may be reproduced without written consent of the California Geological Survey. Los Angeles County Study Area Prepared by the California Department of Conservation, California Geological Survey for the California Department of Health Services, Environmental Health Division, January 2005, According to Interagency Agreement DOC #1002-35R. California Geological Survey Map Design and Layout by Milton Fonseca EXPLANATION Radon Potential Zoning Definitions: Map Features Airport High Potential for Indoor Radon Levels Above 4.0 Picocuries per Liter Moderate Potential for Indoor Radon Levels Above 4.0 Picocuries per Liter Low Potential for Indoor Radon Levels Above 4.0 Picocuries per Liter National Forest Park High Potential for Indoor-Radon Levels Above 4.0 Picocuries per Liter in Recent Alluvium (High - Qa) Special Test Areas - Areas where National Uranium Resource Evaluation (NURE) Project airborne radiometric data suggest rocks and soils contain higher than typical amounts of uranium but where indoor-radon data are currently unavailable. Follow-up SPECIAL REPORT 182 DEPARTMENT OF CONSERVATION - DEBBIE SAREERAM, ACTING DIRECTOR indoor-radon testing is recomended for buildings in these areas. See companion report to this map for further information about these zones. STATE OF CALIFORNIA - ARNOLD SCHWARZENEGGER, GOVERNOR THE RESOURCES AGENCY - MICHAEL CHRISMAN, SECRETARY FOR RESOURCES in targeting their radon program activities and resources. This map is not intended for determining which buildings have excessive indoor radon levels. In addition to geology, indoor radon levels can be influenced by local variability warranty as to actual radon levels at specific sites in Los Angeles County is expressed or implied by this map or the accompanying report. This map identifies areas within Los Angeles County where geologic conditions are more likely to contribute to excessive indoor radon levels. It is intended to assist national, state and local governments and organizations MAP USAGE AND LIMITATIONS The U.S. Environmental Protection Agency (EPA) recommends that all homes be tested for radon whatever their geographic location. Homes with elevated radon levels have been found in all three zones (High, Moderate, and Low) in factors such as soil permeability and climatic conditions, and by factors such as building design, construction, condition, and usage. Consequently, building- specific radon levels can only be determined by indoor radon testing. No within Los Angeles County. The U.S. EPA recommends that action be taken to reduce radon in homes with an average annual level higher than four picocuries per liter (4.0 pCi/l). California Department of Health Services Radon Program, George Faggella, phone (916) 449-5674 California Geological Survey, Ron Churchill, phone (916) 327-0745 Additional information about radon can be found at the following websites: California Department of Health Services Radon Program: http://www.dhs.ca.gov/ps/ddwem/environmental/radon/radon.htm California Geological Survey-Mineral Hazards Project: http://www.consrv.ca.gov/cgs/minerals/hazardous_minerals/radon/index.htm Questions regarding this map should be directed to: U.S. EPA: http://www.epa.gov/iaq/radon/ 1 0 1 2 3 4 5 Miles 2 0 2 4 6 Kilometers Scale: 1:100,000

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Page 1: Radon Potential Zone Map for Southern Los Angeles … POTENTIAL ZONE MAP FOR SOUTHERN CALIFORNIA GEOLOGICAL SURVEY LOS ANGELES COUNTY, CALIFORNIA JOHN G. PARRISH, PhD., STATE GEOLOGIST

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Hacienda HeightsHacienda HeightsHacienda HeightsHacienda HeightsHacienda HeightsHacienda HeightsHacienda HeightsHacienda HeightsHacienda Heights DiamondDiamondDiamondDiamondDiamondDiamondDiamondDiamondDiamondBarBarBarBarBarBarBarBarBar

Pico RiveraPico RiveraPico RiveraPico RiveraPico RiveraPico RiveraPico RiveraPico RiveraPico Rivera

RowlandRowlandRowlandRowlandRowlandRowlandRowlandRowlandRowlandHeightsHeightsHeightsHeightsHeightsHeightsHeightsHeightsHeights

WalnutWalnutWalnutWalnutWalnutWalnutWalnutWalnutWalnut

Westlake VillageWestlake VillageWestlake VillageWestlake VillageWestlake VillageWestlake VillageWestlake VillageWestlake VillageWestlake Village

West HollywoodWest HollywoodWest HollywoodWest HollywoodWest HollywoodWest HollywoodWest HollywoodWest HollywoodWest Hollywood

Beverly HillsBeverly HillsBeverly HillsBeverly HillsBeverly HillsBeverly HillsBeverly HillsBeverly HillsBeverly Hills

CalabasasCalabasasCalabasasCalabasasCalabasasCalabasasCalabasasCalabasasCalabasas

Agoura HillsAgoura HillsAgoura HillsAgoura HillsAgoura HillsAgoura HillsAgoura HillsAgoura HillsAgoura Hills

BurbankBurbankBurbankBurbankBurbankBurbankBurbankBurbankBurbank

MalibuMalibuMalibuMalibuMalibuMalibuMalibuMalibuMalibuCulver CityCulver CityCulver CityCulver CityCulver CityCulver CityCulver CityCulver CityCulver City

Los AngelesLos AngelesLos AngelesLos AngelesLos AngelesLos AngelesLos AngelesLos AngelesLos Angeles

Santa MonicaSanta MonicaSanta MonicaSanta MonicaSanta MonicaSanta MonicaSanta MonicaSanta MonicaSanta Monica

El SegundoEl SegundoEl SegundoEl SegundoEl SegundoEl SegundoEl SegundoEl SegundoEl Segundo

AlhambraAlhambraAlhambraAlhambraAlhambraAlhambraAlhambraAlhambraAlhambra

San GabrielSan GabrielSan GabrielSan GabrielSan GabrielSan GabrielSan GabrielSan GabrielSan Gabriel

EastEastEastEastEastEastEastEastEastLos AngelesLos AngelesLos AngelesLos AngelesLos AngelesLos AngelesLos AngelesLos AngelesLos Angeles

MontebelloMontebelloMontebelloMontebelloMontebelloMontebelloMontebelloMontebelloMontebello

SouthSouthSouthSouthSouthSouthSouthSouthSouthSan GabrielSan GabrielSan GabrielSan GabrielSan GabrielSan GabrielSan GabrielSan GabrielSan Gabriel

Monterey ParkMonterey ParkMonterey ParkMonterey ParkMonterey ParkMonterey ParkMonterey ParkMonterey ParkMonterey Park

San MarinoSan MarinoSan MarinoSan MarinoSan MarinoSan MarinoSan MarinoSan MarinoSan Marino

SouthSouthSouthSouthSouthSouthSouthSouthSouthPasadenaPasadenaPasadenaPasadenaPasadenaPasadenaPasadenaPasadenaPasadena

GlendaleGlendaleGlendaleGlendaleGlendaleGlendaleGlendaleGlendaleGlendale

PasadenaPasadenaPasadenaPasadenaPasadenaPasadenaPasadenaPasadenaPasadena

South El MonteSouth El MonteSouth El MonteSouth El MonteSouth El MonteSouth El MonteSouth El MonteSouth El MonteSouth El Monte

El MonteEl MonteEl MonteEl MonteEl MonteEl MonteEl MonteEl MonteEl Monte

RosemeadRosemeadRosemeadRosemeadRosemeadRosemeadRosemeadRosemeadRosemead

Baldwin ParkBaldwin ParkBaldwin ParkBaldwin ParkBaldwin ParkBaldwin ParkBaldwin ParkBaldwin ParkBaldwin Park

IrwindaleIrwindaleIrwindaleIrwindaleIrwindaleIrwindaleIrwindaleIrwindaleIrwindale

West CovinaWest CovinaWest CovinaWest CovinaWest CovinaWest CovinaWest CovinaWest CovinaWest Covina

San DimasSan DimasSan DimasSan DimasSan DimasSan DimasSan DimasSan DimasSan Dimas

ClaremontClaremontClaremontClaremontClaremontClaremontClaremontClaremontClaremont

DuarteDuarteDuarteDuarteDuarteDuarteDuarteDuarteDuarte

La Canada FlintridgeLa Canada FlintridgeLa Canada FlintridgeLa Canada FlintridgeLa Canada FlintridgeLa Canada FlintridgeLa Canada FlintridgeLa Canada FlintridgeLa Canada Flintridge

LynwoodLynwoodLynwoodLynwoodLynwoodLynwoodLynwoodLynwoodLynwood Santa Fe SpringsSanta Fe SpringsSanta Fe SpringsSanta Fe SpringsSanta Fe SpringsSanta Fe SpringsSanta Fe SpringsSanta Fe SpringsSanta Fe Springs

South GateSouth GateSouth GateSouth GateSouth GateSouth GateSouth GateSouth GateSouth Gate DowneyDowneyDowneyDowneyDowneyDowneyDowneyDowneyDowney

La Habra HeightsLa Habra HeightsLa Habra HeightsLa Habra HeightsLa Habra HeightsLa Habra HeightsLa Habra HeightsLa Habra HeightsLa Habra Heights

CerritosCerritosCerritosCerritosCerritosCerritosCerritosCerritosCerritos

Redondo BeachRedondo BeachRedondo BeachRedondo BeachRedondo BeachRedondo BeachRedondo BeachRedondo BeachRedondo Beach

Palos VerdesPalos VerdesPalos VerdesPalos VerdesPalos VerdesPalos VerdesPalos VerdesPalos VerdesPalos VerdesEstatesEstatesEstatesEstatesEstatesEstatesEstatesEstatesEstates

Long BeachLong BeachLong BeachLong BeachLong BeachLong BeachLong BeachLong BeachLong Beach

Rolling HillsRolling HillsRolling HillsRolling HillsRolling HillsRolling HillsRolling HillsRolling HillsRolling HillsRancho Palos VerdesRancho Palos VerdesRancho Palos VerdesRancho Palos VerdesRancho Palos VerdesRancho Palos VerdesRancho Palos VerdesRancho Palos VerdesRancho Palos Verdes

Santa ClaritaSanta ClaritaSanta ClaritaSanta ClaritaSanta ClaritaSanta ClaritaSanta ClaritaSanta ClaritaSanta Clarita

Manhattan BeachManhattan BeachManhattan BeachManhattan BeachManhattan BeachManhattan BeachManhattan BeachManhattan BeachManhattan Beach

La Crescenta-La Crescenta-La Crescenta-La Crescenta-La Crescenta-La Crescenta-La Crescenta-La Crescenta-La Crescenta-MontroseMontroseMontroseMontroseMontroseMontroseMontroseMontroseMontrose

Van Nuys AirportVan Nuys AirportVan Nuys AirportVan Nuys AirportVan Nuys AirportVan Nuys AirportVan Nuys AirportVan Nuys AirportVan Nuys Airport

Los Angeles International AirportLos Angeles International AirportLos Angeles International AirportLos Angeles International AirportLos Angeles International AirportLos Angeles International AirportLos Angeles International AirportLos Angeles International AirportLos Angeles International Airport

Topanga State ParkTopanga State ParkTopanga State ParkTopanga State ParkTopanga State ParkTopanga State ParkTopanga State ParkTopanga State ParkTopanga State Park

Leo CarrilloLeo CarrilloLeo CarrilloLeo CarrilloLeo CarrilloLeo CarrilloLeo CarrilloLeo CarrilloLeo CarrilloState BeachState BeachState BeachState BeachState BeachState BeachState BeachState BeachState Beach

Santa Monica Mountains NRASanta Monica Mountains NRASanta Monica Mountains NRASanta Monica Mountains NRASanta Monica Mountains NRASanta Monica Mountains NRASanta Monica Mountains NRASanta Monica Mountains NRASanta Monica Mountains NRA

Griffith ParkGriffith ParkGriffith ParkGriffith ParkGriffith ParkGriffith ParkGriffith ParkGriffith ParkGriffith Park

Ventura CountyVentura CountyVentura CountyVentura CountyVentura CountyVentura CountyVentura CountyVentura CountyVentura County

San Bernardino CountySan Bernardino CountySan Bernardino CountySan Bernardino CountySan Bernardino CountySan Bernardino CountySan Bernardino CountySan Bernardino CountySan Bernardino County

Orange CountyOrange CountyOrange CountyOrange CountyOrange CountyOrange CountyOrange CountyOrange CountyOrange County

A n g e l e s N a t i o n a l F o r e s tA n g e l e s N a t i o n a l F o r e s tA n g e l e s N a t i o n a l F o r e s tA n g e l e s N a t i o n a l F o r e s tA n g e l e s N a t i o n a l F o r e s tA n g e l e s N a t i o n a l F o r e s tA n g e l e s N a t i o n a l F o r e s tA n g e l e s N a t i o n a l F o r e s tA n g e l e s N a t i o n a l F o r e s t

A n g e l e s N a t i o n a l F o r e s tA n g e l e s N a t i o n a l F o r e s tA n g e l e s N a t i o n a l F o r e s tA n g e l e s N a t i o n a l F o r e s tA n g e l e s N a t i o n a l F o r e s tA n g e l e s N a t i o n a l F o r e s tA n g e l e s N a t i o n a l F o r e s tA n g e l e s N a t i o n a l F o r e s tA n g e l e s N a t i o n a l F o r e s t

Harbor LakeHarbor LakeHarbor LakeHarbor LakeHarbor LakeHarbor LakeHarbor LakeHarbor LakeHarbor Lake

Live OakLive OakLive OakLive OakLive OakLive OakLive OakLive OakLive OakReservoirReservoirReservoirReservoirReservoirReservoirReservoirReservoirReservoir

Thompson CreekThompson CreekThompson CreekThompson CreekThompson CreekThompson CreekThompson CreekThompson CreekThompson CreekReservoirReservoirReservoirReservoirReservoirReservoirReservoirReservoirReservoir

Puddingstone ReservoirPuddingstone ReservoirPuddingstone ReservoirPuddingstone ReservoirPuddingstone ReservoirPuddingstone ReservoirPuddingstone ReservoirPuddingstone ReservoirPuddingstone Reservoir

HerbertHerbertHerbertHerbertHerbertHerbertHerbertHerbertHerbertLegg LakeLegg LakeLegg LakeLegg LakeLegg LakeLegg LakeLegg LakeLegg LakeLegg Lake

San

Gab

riel R

iver

San

Gab

riel R

iver

San

Gab

riel R

iver

San

Gab

riel R

iver

San

Gab

riel R

iver

San

Gab

riel R

iver

San

Gab

riel R

iver

San

Gab

riel R

iver

San

Gab

riel R

iver

Malibu LakeMalibu LakeMalibu LakeMalibu LakeMalibu LakeMalibu LakeMalibu LakeMalibu LakeMalibu Lake

Westlake ReservoirWestlake ReservoirWestlake ReservoirWestlake ReservoirWestlake ReservoirWestlake ReservoirWestlake ReservoirWestlake ReservoirWestlake Reservoir

Lake CalabasasLake CalabasasLake CalabasasLake CalabasasLake CalabasasLake CalabasasLake CalabasasLake CalabasasLake Calabasas

Encino ReservoirEncino ReservoirEncino ReservoirEncino ReservoirEncino ReservoirEncino ReservoirEncino ReservoirEncino ReservoirEncino Reservoir

Stone CanyonStone CanyonStone CanyonStone CanyonStone CanyonStone CanyonStone CanyonStone CanyonStone CanyonReservoirReservoirReservoirReservoirReservoirReservoirReservoirReservoirReservoir

Hansen DamHansen DamHansen DamHansen DamHansen DamHansen DamHansen DamHansen DamHansen DamFlood ControlFlood ControlFlood ControlFlood ControlFlood ControlFlood ControlFlood ControlFlood ControlFlood Control

BasinBasinBasinBasinBasinBasinBasinBasinBasin

Upper VanUpper VanUpper VanUpper VanUpper VanUpper VanUpper VanUpper VanUpper VanNorman LakeNorman LakeNorman LakeNorman LakeNorman LakeNorman LakeNorman LakeNorman LakeNorman Lake

Hollywood ReservoirHollywood ReservoirHollywood ReservoirHollywood ReservoirHollywood ReservoirHollywood ReservoirHollywood ReservoirHollywood ReservoirHollywood Reservoir

Los Angeles River

Los Angeles River

Los Angeles River

Los Angeles River

Los Angeles River

Los Angeles River

Los Angeles River

Los Angeles River

Los Angeles River

Rio H

ondo

Rio H

ondo

Rio H

ondo

Rio H

ondo

Rio H

ondo

Rio H

ondo

Rio H

ondo

Rio H

ondo

Rio H

ondo

Devils GateDevils GateDevils GateDevils GateDevils GateDevils GateDevils GateDevils GateDevils GateReservoirReservoirReservoirReservoirReservoirReservoirReservoirReservoirReservoir

Cogswell ReservoirCogswell ReservoirCogswell ReservoirCogswell ReservoirCogswell ReservoirCogswell ReservoirCogswell ReservoirCogswell ReservoirCogswell Reservoir

Big Tujunga DamBig Tujunga DamBig Tujunga DamBig Tujunga DamBig Tujunga DamBig Tujunga DamBig Tujunga DamBig Tujunga DamBig Tujunga Dam

118° 45' 00"118° 45' 00"118° 45' 00"118° 45' 00"118° 45' 00"118° 45' 00"118° 45' 00"118° 45' 00"118° 45' 00" 34° 15' 00" 34° 15' 00" 34° 15' 00" 34° 15' 00" 34° 15' 00" 34° 15' 00" 34° 15' 00" 34° 15' 00" 34° 15' 00"

118° 30' 00"118° 30' 00"118° 30' 00"118° 30' 00"118° 30' 00"118° 30' 00"118° 30' 00"118° 30' 00"118° 30' 00" 34° 00' 00" 34° 00' 00" 34° 00' 00" 34° 00' 00" 34° 00' 00" 34° 00' 00" 34° 00' 00" 34° 00' 00" 34° 00' 00"

118° 45' 00"118° 45' 00"118° 45' 00"118° 45' 00"118° 45' 00"118° 45' 00"118° 45' 00"118° 45' 00"118° 45' 00" 34° 00' 00" 34° 00' 00" 34° 00' 00" 34° 00' 00" 34° 00' 00" 34° 00' 00" 34° 00' 00" 34° 00' 00" 34° 00' 00"

117° 45' 00"117° 45' 00"117° 45' 00"117° 45' 00"117° 45' 00"117° 45' 00"117° 45' 00"117° 45' 00"117° 45' 00" 34° 00' 00" 34° 00' 00" 34° 00' 00" 34° 00' 00" 34° 00' 00" 34° 00' 00" 34° 00' 00" 34° 00' 00" 34° 00' 00"

117° 45' 00"117° 45' 00"117° 45' 00"117° 45' 00"117° 45' 00"117° 45' 00"117° 45' 00"117° 45' 00"117° 45' 00" 34° 15' 00" 34° 15' 00" 34° 15' 00" 34° 15' 00" 34° 15' 00" 34° 15' 00" 34° 15' 00" 34° 15' 00" 34° 15' 00"

118° 00' 00"118° 00' 00"118° 00' 00"118° 00' 00"118° 00' 00"118° 00' 00"118° 00' 00"118° 00' 00"118° 00' 00" 34° 15' 00" 34° 15' 00" 34° 15' 00" 34° 15' 00" 34° 15' 00" 34° 15' 00" 34° 15' 00" 34° 15' 00" 34° 15' 00"

118° 00' 00"118° 00' 00"118° 00' 00"118° 00' 00"118° 00' 00"118° 00' 00"118° 00' 00"118° 00' 00"118° 00' 00" 33° 45' 00" 33° 45' 00" 33° 45' 00" 33° 45' 00" 33° 45' 00" 33° 45' 00" 33° 45' 00" 33° 45' 00" 33° 45' 00"

118° 30' 00"118° 30' 00"118° 30' 00"118° 30' 00"118° 30' 00"118° 30' 00"118° 30' 00"118° 30' 00"118° 30' 00" 33° 45' 00" 33° 45' 00" 33° 45' 00" 33° 45' 00" 33° 45' 00" 33° 45' 00" 33° 45' 00" 33° 45' 00" 33° 45' 00"

117° 45' 00"117° 45' 00"117° 45' 00"117° 45' 00"117° 45' 00"117° 45' 00"117° 45' 00"117° 45' 00"117° 45' 00" 33° 45' 00" 33° 45' 00" 33° 45' 00" 33° 45' 00" 33° 45' 00" 33° 45' 00" 33° 45' 00" 33° 45' 00" 33° 45' 00"

AltadenaAltadenaAltadenaAltadenaAltadenaAltadenaAltadenaAltadenaAltadena

ArcadiaArcadiaArcadiaArcadiaArcadiaArcadiaArcadiaArcadiaArcadia

ArtesiaArtesiaArtesiaArtesiaArtesiaArtesiaArtesiaArtesiaArtesia

AzusaAzusaAzusaAzusaAzusaAzusaAzusaAzusaAzusa

BellBellBellBellBellBellBellBellBell

BellflowerBellflowerBellflowerBellflowerBellflowerBellflowerBellflowerBellflowerBellflower

Bell GardensBell GardensBell GardensBell GardensBell GardensBell GardensBell GardensBell GardensBell Gardens

BradburyBradburyBradburyBradburyBradburyBradburyBradburyBradburyBradbury

CarsonCarsonCarsonCarsonCarsonCarsonCarsonCarsonCarson

CitrusCitrusCitrusCitrusCitrusCitrusCitrusCitrusCitrus

CommerceCommerceCommerceCommerceCommerceCommerceCommerceCommerceCommerce

ComptonComptonComptonComptonComptonComptonComptonComptonCompton

CovinaCovinaCovinaCovinaCovinaCovinaCovinaCovinaCovina

CudahyCudahyCudahyCudahyCudahyCudahyCudahyCudahyCudahy

GardenaGardenaGardenaGardenaGardenaGardenaGardenaGardenaGardena

GlendoraGlendoraGlendoraGlendoraGlendoraGlendoraGlendoraGlendoraGlendora

HawthorneHawthorneHawthorneHawthorneHawthorneHawthorneHawthorneHawthorneHawthorne

Hermosa BeachHermosa BeachHermosa BeachHermosa BeachHermosa BeachHermosa BeachHermosa BeachHermosa BeachHermosa Beach

Hidden HillsHidden HillsHidden HillsHidden HillsHidden HillsHidden HillsHidden HillsHidden HillsHidden Hills

Huntington ParkHuntington ParkHuntington ParkHuntington ParkHuntington ParkHuntington ParkHuntington ParkHuntington ParkHuntington Park

IndustryIndustryIndustryIndustryIndustryIndustryIndustryIndustryIndustry

InglewoodInglewoodInglewoodInglewoodInglewoodInglewoodInglewoodInglewoodInglewood

LakewoodLakewoodLakewoodLakewoodLakewoodLakewoodLakewoodLakewoodLakewood

La MiradaLa MiradaLa MiradaLa MiradaLa MiradaLa MiradaLa MiradaLa MiradaLa Mirada

La PuenteLa PuenteLa PuenteLa PuenteLa PuenteLa PuenteLa PuenteLa PuenteLa Puente

La VerneLa VerneLa VerneLa VerneLa VerneLa VerneLa VerneLa VerneLa Verne

LomitaLomitaLomitaLomitaLomitaLomitaLomitaLomitaLomita

Marina del ReyMarina del ReyMarina del ReyMarina del ReyMarina del ReyMarina del ReyMarina del ReyMarina del ReyMarina del Rey

MaywoodMaywoodMaywoodMaywoodMaywoodMaywoodMaywoodMaywoodMaywood

MonroviaMonroviaMonroviaMonroviaMonroviaMonroviaMonroviaMonroviaMonrovia

NorwalkNorwalkNorwalkNorwalkNorwalkNorwalkNorwalkNorwalkNorwalk

ParamountParamountParamountParamountParamountParamountParamountParamountParamount

PomonaPomonaPomonaPomonaPomonaPomonaPomonaPomonaPomona

San FernandoSan FernandoSan FernandoSan FernandoSan FernandoSan FernandoSan FernandoSan FernandoSan Fernando

Sierra MadreSierra MadreSierra MadreSierra MadreSierra MadreSierra MadreSierra MadreSierra MadreSierra Madre

Signal HillSignal HillSignal HillSignal HillSignal HillSignal HillSignal HillSignal HillSignal Hill

South WhittierSouth WhittierSouth WhittierSouth WhittierSouth WhittierSouth WhittierSouth WhittierSouth WhittierSouth Whittier

Temple CityTemple CityTemple CityTemple CityTemple CityTemple CityTemple CityTemple CityTemple City

TorranceTorranceTorranceTorranceTorranceTorranceTorranceTorranceTorrance

VernonVernonVernonVernonVernonVernonVernonVernonVernon

Walnut ParkWalnut ParkWalnut ParkWalnut ParkWalnut ParkWalnut ParkWalnut ParkWalnut ParkWalnut Park

West ComptonWest ComptonWest ComptonWest ComptonWest ComptonWest ComptonWest ComptonWest ComptonWest Compton

WhittierWhittierWhittierWhittierWhittierWhittierWhittierWhittierWhittier

WillowbrookWillowbrookWillowbrookWillowbrookWillowbrookWillowbrookWillowbrookWillowbrookWillowbrook

RADON POTENTIAL ZONE MAP FOR SOUTHERNLOS ANGELES COUNTY, CALIFORNIACALIFORNIA GEOLOGICAL SURVEY

JOHN G. PARRISH, PhD., STATE GEOLOGIST

Radon Potential Zone Map for Southern Los Angeles County, California

Ron Churchill

January, 2005

A digital version of the radon zone location layers is available fromthe California Department of Conservation, California Geological Survey, 801 K Street, MS 08-38, Sacramento, CA 95814-3531.Base map derived from U.S. Census Bureau, 2000 TIGER Data.

Copyright © 2005 by the California Department of Conservation,California Geological Survey. All rights reserved. No part of this publication may be reproduced without written consent ofthe California Geological Survey.

Los AngelesCounty

Study Area

Prepared by the California Department of Conservation, California Geological Surveyfor the California Department of Health Services, Environmental Health Division,

January 2005, According to Interagency Agreement DOC #1002-35R.

California Geological Survey

Map Design and Layout by Milton Fonseca

EXPLANATION

Radon Potential Zoning Definitions:

Map Features

Airport

High Potential for Indoor Radon Levels Above 4.0 Picocuries per Liter

Moderate Potential for Indoor Radon Levels Above 4.0 Picocuries per Liter

Low Potential for Indoor Radon Levels Above 4.0 Picocuries per Liter

National Forest

Park

High Potential for Indoor-Radon Levels Above 4.0 Picocuries per Liter in Recent Alluvium (High - Qa)

Special Test Areas - Areas where National Uranium Resource Evaluation (NURE)Project airborne radiometric data suggest rocks and soils contain higher than typicalamounts of uranium but where indoor-radon data are currently unavailable. Follow-up

SPECIAL REPORT 182DEPARTMENT OF CONSERVATION - DEBBIE SAREERAM, ACTING DIRECTOR

indoor-radon testing is recomended for buildings in these areas.

See companion report to this map for further information about these zones.

STATE OF CALIFORNIA - ARNOLD SCHWARZENEGGER, GOVERNORTHE RESOURCES AGENCY - MICHAEL CHRISMAN, SECRETARY FOR RESOURCES

in targeting their radon program activities and resources. This map is not intended for determining which buildings have excessive indoor radon levels.In addition to geology, indoor radon levels can be influenced by local variability

warranty as to actual radon levels at specific sites in Los Angeles County isexpressed or implied by this map or the accompanying report.

This map identifies areas within Los Angeles County where geologicconditions are more likely to contribute to excessive indoor radon levels. It is intended to assist national, state and local governments and organizations

MAP USAGE AND LIMITATIONS

The U.S. Environmental Protection Agency (EPA) recommends that all homesbe tested for radon whatever their geographic location. Homes with elevatedradon levels have been found in all three zones (High, Moderate, and Low)

in factors such as soil permeability and climatic conditions, and by factors suchas building design, construction, condition, and usage. Consequently, building-specific radon levels can only be determined by indoor radon testing. No

within Los Angeles County. The U.S. EPA recommends that action be takento reduce radon in homes with an average annual level higher than four picocuries per liter (4.0 pCi/l).

California Department of Health Services Radon Program,George Faggella, phone (916) 449-5674California Geological Survey, Ron Churchill, phone (916) 327-0745Additional information about radon can be found at the following websites:

California Department of Health Services Radon Program:http://www.dhs.ca.gov/ps/ddwem/environmental/radon/radon.htmCalifornia Geological Survey-Mineral Hazards Project:http://www.consrv.ca.gov/cgs/minerals/hazardous_minerals/radon/index.htm

Questions regarding this map should be directed to:

U.S. EPA: http://www.epa.gov/iaq/radon/

1 0 1 2 3 4 5

Miles

2 0 2 4 6

Kilometers

Scale: 1:100,000

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