20210108 10063600 1.0 TRUE TRUE RadonPotentialStudyAreas Study area boundaries for indoor radon potential conducted by the California Geological Survey. Radon California California Geological Survey California Department of Conservation California Geology Geologic Hazards Land Use Planning California Natural Resources Agency CAOpenData CGS DOC CNRA Radon California California Geological Survey California Department of Conservation California Geology Geologic Hazards Land Use Planning California Natural Resources Agency CAOpenData CGS This digital layer is intended for use by county staff to identify those portions of the county area where homes are more likely to have indoor-air radon concentrations exceeding the U.S. EPA recommended radon action level of 4.0 picocuries per liter. This digital layer should assist them in identifying areas where indoor-radon testing should be encouraged and public awareness programs may be beneficial. California Geological Survey, California Department of Conservation This map layer is intended for use by staff to identify portions of the county where homes are more likely to have indoor-air radon concentrations exceeding the U.S. EPA recommended radon action level of 4.0 picocuries per liter (pCi/L). The four radon zone categories indicate the likelihood of a home having indoor-radon concentrations at or above the 4.0 pCi/L action level: High (>20 percent), Moderate (5 to 19.9 percent), Low (< 5 percent), and Unknown (insufficient data to estimate the radon potential). The map layer does not provide specific information about the indoor-radon concentration of a home at any given location within a zone. The only way to accurately determine the indoor-radon concentration within a home at any location is by testing the indoor-air of that home. This can be done by the homeowner using inexpensive testing devices which are sent to commercial laboratories for evaluation or by certified radon testing professionals. This map layer is designed to be used at a map scale of 1:100,000 and not more detailed scales. At this scale it is not unusual for geologic unit boundaries (and, consequently, corresponding radon zone boundaries) to have accuracy limitations of plus or minus tens to several hundred feet and sometimes more. Consequently, radon zone classifications are less certain for locations nearer zone boundaries. CGS does not guarantee the accuracy of radon potential limitations for property parcels based on this map. /9j/4AAQSkZJRgABAQEAAAAAAAD/2wBDAAgGBgcGBQgHBwcJCQgKDBQNDAsLDBkSEw8UHRofHh0a HBwgJC4nICIsIxwcKDcpLDAxNDQ0Hyc5PTgyPC4zNDL/2wBDAQkJCQwLDBgNDRgyIRwhMjIyMjIy MjIyMjIyMjIyMjIyMjIyMjIyMjIyMjIyMjIyMjIyMjIyMjIyMjIyMjIyMjL/wAARCACFAMgDAREA AhEBAxEB/8QAHwAAAQUBAQEBAQEAAAAAAAAAAAECAwQFBgcICQoL/8QAtRAAAgEDAwIEAwUFBAQA AAF9AQIDAAQRBRIhMUEGE1FhByJxFDKBkaEII0KxwRVS0fAkM2JyggkKFhcYGRolJicoKSo0NTY3 ODk6Q0RFRkdISUpTVFVWV1hZWmNkZWZnaGlqc3R1dnd4eXqDhIWGh4iJipKTlJWWl5iZmqKjpKWm p6ipqrKztLW2t7i5usLDxMXGx8jJytLT1NXW19jZ2uHi4+Tl5ufo6erx8vP09fb3+Pn6/8QAHwEA AwEBAQEBAQEBAQAAAAAAAAECAwQFBgcICQoL/8QAtREAAgECBAQDBAcFBAQAAQJ3AAECAxEEBSEx BhJBUQdhcRMiMoEIFEKRobHBCSMzUvAVYnLRChYkNOEl8RcYGRomJygpKjU2Nzg5OkNERUZHSElK U1RVVldYWVpjZGVmZ2hpanN0dXZ3eHl6goOEhYaHiImKkpOUlZaXmJmaoqOkpaanqKmqsrO0tba3 uLm6wsPExcbHyMnK0tPU1dbX2Nna4uPk5ebn6Onq8vP09fb3+Pn6/9oADAMBAAIRAxEAPwD3+gAo AKACgAoAKACgAoAKACgAoAKACgAoAKACgAoAKACgAoAKACgAoAKACgAoAKACgAoAKACgAoAKACgA oAKAGSEiNiOoBoQCJklj/D0HOaAJKACgAoAKACgAoAKACgAoAKACgAoAKACgAoAKACgAoAKACgAo AKACgCOX/VP/ALpoQC4KsME4J6UwH0gCgAoAKACgAoAKACgAoAKACgAoAKACgAoAKACgAoAKACgA oAKACgAoAaEUHIUD6CgB1ABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUA FABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAyQkAYOOaaAFbdnjBBwaQD6ACgAoAK ACgAoAKACgAoAKACgAoAKACgAoAKACgAoAKACgAoAKACgBrglSB1oAjj343MBzyVH8JpsRKCGGQe KQxaACgAoAKACgAoAKACgAoAKACgAoAKACgAoAKACgAoAKACgAoAKACgCKRY+rAZ6A45/CmgEVfK /vENySSTg0biJqQwoAKAGs6p944oAdQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAxx lc4zg5oAdw6+oNAEeWQ4wzAd/T/GgByPvQMARnse1AD6AIkH7yTvyOvrigBy/KxXt1FAD6ACgAoA KACgAoAKACgAoAKACgAoAKACgAoAKACgAoAKAI2Plkvzt7gDP40AN+0J/dk/79N/hTsK4wzKuSiy epHlNz+lFguTghgCOh5pDIw4R5BhuWzwpPYUxBvDOuA3XupGKBk1IAoAKACgAoAKACgAoAKACgAo AKACgAoAKACgAoAKACgAoAZ9z3Un8qYD6QEQ/d4U/d6A5p7gS0gCgAoAKACgAoAKACgAoAKACgAo AKACgAoAKACgAoAKACgAoAKAEIDCgCETEKcozDdtBH1xTsId+8xh0VgeoHb8+tIY2NlDGPcPlAwD 1H+cU2InpDCgAoAKACgAoAKACgAoAKACgAoAKACgAoAKACgAoAKACgAoAKAIgwVmDcEnIz3pgPDK TgEE+lICPAadwQCNg/maOgDiApBHAzgimBJSAKACgAoAKACgAoAKACgAoAKACgAoAKACgAoAKACg AoAKACgAoAayqwwwB+ooAb5YX5kUA+g707gMlkUqUwAWB+/wKEhD0SMqCqqfcCjUYjqoA7EkAUAS 0gCgAoAKACgAoAKACgAoAKACgAoAKACgAoAKACgAoAKACgAoAKACgDPlN+uoReSkDWbLiQsxDq3P I7Y6CqXLbXcWtyykY6nAl7n/AD2pXAlVtw5GCODSGOoAKACgAoAKACgAoAKACgAoAKACgAoAKACg AoAKACgAoAKACgAoAKAGsoYeh7EdqAFVQowKAFoAKACgAoAKACgAoAKACgAoAKACgAoAKACgAoAK ACgAoAKACgAoAKACgAoAKACgAoAKACgAoAKAP//Z