Laserfiche WebLink
January 17, 2006 <br /> RNC PROJECT NUMBER 41204B Page 24 <br /> a result, all buildings have some radon, as does the outdoor air. Radon can move easily <br /> through any material that has pores or void spaces through which gases can move. Void <br /> spaces and pores are found in the soil beneath any building. Radon is a known human <br /> carcinogen. The Surgeon General has warned that radon is the second leading cause of <br /> lung cancer in the United States. Anyone living in a building with elevated radon <br /> concentrations may have an increased risk of contracting lung cancer over a period of <br /> t years. <br /> The National Radon Database has been developed by the U.S. Environmental Protection <br /> Agency and is a compilation of the EPA/State Residential Radon Survey and the National <br /> Residential Radon Survey. Where necessary, data has been supplemented by information <br /> collected from private sources such as universities and research institutions. <br /> The US EPA has designated San Joaquin County as Radon Zone 3, where average radon <br /> x level in the area is less than 2.0 pCi/L (pico curies per liter of air) for the first floor living <br /> area. A pico curie is equal to the radiation given off by a trillionth of a gram of radium. <br /> A liter is about a quart. <br /> Recommended action by the USEPA is as follows: <br /> Under 2 pCi/L reducing radon levels below 2 pCi/L is difficult <br /> I <br /> f ! 2 pCi/ -4 pCi/L consider reducing levels to below 2 Ci L, however no action <br /> p / needs <br /> to be taken �. <br /> 4 Ci L-20 Ci L take action to reduce radon levels to below 4 pCi/L <br /> Over 20 pCi/L take action to reduce concentrations to as far below 20 pCi/Las <br /> possible <br /> Over 200 pCi/L take immediate action to reduce concentrations as far below 200 <br /> pCi/L as possible. �. <br /> This is only a general estimation of the radon levels for the area in which the subject <br /> property is located. Site specific radon testing is recommended to determine specific <br /> conditions on the subject property. a <br /> l <br /> i <br /> i <br /> ' I <br /> `s <br />�# RNC Environmental, LLC • 9746 Parktree Way,Elk Grove, CA 95624 • 916.714.3073 • fax 916.290.01.06 � <br /> Coanrnitment to Service-.Pride in Excellence <br /> G <br />