什么潜伏在你的厨房台面？ (1)

+++++++++++中文翻译由计算机完成，原文来自”THE　NEW　YORK　TIMES“。 ++++++++
>>>>>>>有些花岗岩的辐射和氡含量还是蛮高的。小心来自巴西和纳米比亚的
林恩的 Teaneck，N.J.，Sugarman 在两年前湖乔治，N.Y.买回家她夏天的短前例行检查发现它有的一种可以导致肺癌的放射性气体氡，水平的升高。 所以，她叫氡测量减灾技术人员查找源。 他去从房说博士 Sugarman，一名儿科医生。 但他停止他当场在的厨房，丰富了粒霜、 褐紫红色的花岗岩 countertops 中。

他盖革计数器表示花岗岩冒出辐射水平比他有量在房子里的其它地方高出 10 倍。 Sugarman 博士说，"我首先想到的是，女儿怀孕来度周末，"。 技术人员告诉她，使她的女儿几英尺只为安全起见，她说，"我让他们出当天很翻录"countertops 时，送往国家卫生部分析。 在的花岗岩原来，它包含铀，而不只是放射性释放氡气，它衰变的高的水平。

Sugarman 博士说： 「 我和我的家人的健康风险是可能小 」，「 但我认为这是一个不必要的风险 」。

随着花岗岩 countertops 的普及已近十年 — — 对他们的需求已增至十倍，根据大理石美国研究所表示的花岗岩加工贸易组 — 有花岗岩可用的类型。 例如一个的来源 Graniteland (graniteland.com) 提供花岗岩的 900 多家的种来自 63 个国家。 并增加销售数量和品种有"热"或有潜在危险 countertops 尤其是巴西和纳米比亚的外来更有横纹品种的详细报道。

What’s Lurking in Your Countertop?

SHORTLY before Lynn Sugarman of Teaneck, N.J., bought her summer home in Lake George, N.Y., two years ago, a routine inspection revealed it had elevated levels of radon, a radioactive gas that can cause lung cancer. So she called a radon measurement and mitigation technician to find the source. “He went from room to room,” said Dr. Sugarman, a pediatrician. But he stopped in his tracks in the kitchen, which had richly grained cream, brown and burgundy granite countertops. His Geiger counter indicated that the granite was emitting radiation at levels 10 times higher than those he had measured elsewhere in the house. “My first thought was, my pregnant daughter was coming for the weekend,” Dr. Sugarman said. When the technician told her to keep her daughter several feet from the countertops just to be safe, she said, “I had them ripped out that very day,” and sent to the state Department of Health for analysis. The granite, it turned out, contained high levels of uranium, which is not only radioactive but releases radon gas as it decays. “The health risk to me and my family was probably small,” Dr. Sugarman said, “but I felt it was an unnecessary risk.” As the popularity of granite countertops has grown in the last decade — demand for them has increased tenfold, according to the Marble Institute of America, a trade group representing granite fabricators — so have the types of granite available. For example, one source, Graniteland (graniteland.com) offers more than 900 kinds of granite from 63 countries. And with increased sales volume and variety, there have been more reports of “hot” or potentially hazardous countertops, particularly among the more exotic and striated varieties from Brazil and Namibia. 什么潜伏在你的厨房台面？ (5) 2010-06-24 17:59:58 在哪里查找测试和测试仪对查找认证的技术人员，以确定是否辐射或氡源于一个花岗岩台面，业主可以联系美国协会的氡科学家和技术专家 (aarst.org)。 测试 100 元至 300 元费用。 经认证的技术人员和自己动手氡测试工具包的信息是可用的环境保护署的网站，网址为 epa.gov/radon，以及从国家或地区的室内空气环境办公室，可以在 epa.gov/iaq/whereyoulive.html 找到。 工具包氡，不辐射，试验和成本 20 美元至 30 美元。 他们卖的是在硬件存储和联机。 Where to Find Tests and Testers TO find a certified technician to determine whether radiation or radon is emanating from a granite countertop, homeowners can contact the American Association of Radon Scientists and Technologists (aarst.org). Testing costs between $100 and $300. Information on certified technicians and do-it-yourself radon testing kits is available from the Environmental Protection Agency’s Web site at epa.gov/radon, as well as from state or regional indoor air environment offices, which can be found at epa.gov/iaq/whereyoulive.html. Kits test for radon, not radiation, and cost $20 to $30. They are sold at hardware stores and online. [打印] [编辑] [删除] 由阿团张贴 @ 2010-06-24 17:59:58 (4) 共 0 篇评论 发表评论 >>> 什么潜伏在你的厨房台面？ (4) 2010-06-24 17:55:35 在 E.P.A.建议采取行动，如果家中的氡气体水平超过 4 picocuries，每升空气 (的放射性废气排放的措施） ； 有关相同风险作为吸烟半癌一包香烟每日。如果在博士卫生厨房读数每升 100 picocuries。在她的地下室，氡读数预计会更高，因为气体通常渗透入住安老院的衰减铀地下，阅读了每升 6 picocuries。一般人是从自然和人为的来源，每年可达到 360 millirem （一被人体吸收能量措施），E.P.A.和核监督管理委员会等政府机构依法受到辐射。设置由核反应堆附近的居民委员会的额外暴露的限制为每 100 年 millirem。若要把这的角度来看，乘客上车宇宙辐射 3 millirem 航班从纽约到洛杉矶。 The E.P.A. recommends taking action if radon gas levels in the home exceeds 4 picocuries per liter of air (a measure of radioactive emission); about the same risk for cancer as smoking a half a pack of cigarettes per day. In Dr. Sugarman’s kitchen, the readings were 100 picocuries per liter. In her basement, where radon readings are expected to be higher because the gas usually seeps into homes from decaying uranium underground, the readings were 6 picocuries per liter. The average person is subjected to radiation from natural and manmade sources at an annual level of 360 millirem (a measure of energy absorbed by the body), according to government agencies like the E.P.A. and the Nuclear Regulatory Commission. The limit of additional exposure set by the commission for people living near nuclear reactors is 100 millirem per year. To put this in perspective, passengers get 3 millirem of cosmic radiation on a flight from New York to Los Angeles. [打印] [编辑] [删除] 由阿团张贴 @ 2010-06-24 17:55:35 (16) 共 0 篇评论 发表评论 >>> 什么潜伏在你的厨房台面？ (3) 2010-06-24 17:52:20 事实上，健康物理学家和放射专家同意大多数花岗岩 countertops 发出辐射与氡在极低的水平。 他们说这些废气是微不足道相比不断下雨从外层空间或渗透了从地球的地壳的不用说源于人造源的所谓背景辐射，如 x 光片、 夜光手表和烟雾探测器。 但随着规律在近几个月中，环境保护署已被接收呼叫氡督察以及有关花岗岩 countertops 辐射测量几次以上背景水平与有关业主。 "我们已经被听到人们关注高的读数在全国各地从"说卢 · 维特，该机构的室内环境部的一个程序分析师。 Indeed, health physicists and radiation experts agree that most granite countertops emit radiation and radon at extremely low levels. They say these emissions are insignificant compared with so-called background radiation that is constantly raining down from outer space or seeping up from the earth’s crust, not to mention emanating from manmade sources like X-rays, luminous watches and smoke detectors. But with increasing regularity in recent months, the Environmental Protection Agency has been receiving calls from radon inspectors as well as from concerned homeowners about granite countertops with radiation measurements several times above background levels. “We’ve been hearing from people all over the country concerned about high readings,” said Lou Witt, a program analyst with the agency’s Indoor Environments Division. [打印] [编辑] [删除] 由阿团张贴 @ 2010-06-24 17:52:20 (26) 共 0 篇评论 发表评论 >>> 什么潜伏在你的厨房台面？ (2) 2010-06-24 17:49:37 "这是不是危险的所有的花岗岩"说，赤柱 Liebert，质量保证主任在 CMT 实验室中克利夫顿公园，N.Y.，Sugarman 博士的家曾辐射测量。 「 但我见到的几个可能有点加热您 Cheerios 」。 花岗岩 countertops 可能发出的氡和辐射的危险级别的指控提出了定期对在过去的十年大多由制造商和分销商的竞争台面材料。 美国的大理石研究所所说此类索赔是"可笑"的因为虽然花岗岩已知含有铀、 钍和钾等其他放射性材料，在 countertops 金额不足以构成健康威胁。 “It’s not that all granite is dangerous,” said Stanley Liebert, the quality assurance director at CMT Laboratories in Clifton Park, N.Y., who took radiation measurements at Dr. Sugarman’s house. “But I’ve seen a few that might heat up your Cheerios a little.” Allegations that granite countertops may emit dangerous levels of radon and radiation have been raised periodically over the past decade, mostly by makers and distributors of competing countertop materials. The Marble Institute of America has said such claims are “ludicrous” because although granite is known to contain uranium and other radioactive materials like thorium and potassium, the amounts in countertops are not enough to pose a health threat. [打印] [编辑] [删除]