[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-detail-502859-en":59,"doc-seo-502859-105":79},{"code":4,"msg":5,"data":6},0,"success",[7,13,18,23,28,33,38,43,48,51,55],{"id":8,"doc_module":4,"doc_module_name":9,"category_name":10,"show_sort_weight":11,"slug":12},1,"Document","Story & Novel",90,"story-novel",{"id":14,"doc_module":4,"doc_module_name":9,"category_name":15,"show_sort_weight":16,"slug":17},2,"Literature",80,"literature",{"id":19,"doc_module":4,"doc_module_name":9,"category_name":20,"show_sort_weight":21,"slug":22},4,"Exam",70,"exam",{"id":24,"doc_module":4,"doc_module_name":9,"category_name":25,"show_sort_weight":26,"slug":27},5,"Comic",60,"comic",{"id":29,"doc_module":4,"doc_module_name":9,"category_name":30,"show_sort_weight":31,"slug":32},6,"Technology",50,"technology",{"id":34,"doc_module":4,"doc_module_name":9,"category_name":35,"show_sort_weight":36,"slug":37},7,"Healthcare",40,"healthcare",{"id":39,"doc_module":4,"doc_module_name":9,"category_name":40,"show_sort_weight":41,"slug":42},8,"Research & Report",30,"research-report",{"id":44,"doc_module":4,"doc_module_name":9,"category_name":45,"show_sort_weight":46,"slug":47},9,"Religion & Spirituality",20,"religion-spirituality",{"id":46,"doc_module":4,"doc_module_name":9,"category_name":49,"show_sort_weight":46,"slug":50},"World Cup","world-cup",{"id":52,"doc_module":4,"doc_module_name":9,"category_name":53,"show_sort_weight":52,"slug":54},10,"Lifestyle","lifestyle",{"id":56,"doc_module":4,"doc_module_name":9,"category_name":57,"show_sort_weight":24,"slug":58},19,"General","general",{"code":4,"msg":5,"data":60},{"doc_id":61,"user_id":62,"nickname":63,"user_avatar":64,"doc_module":4,"category_id":34,"category_name":35,"doc_title":65,"doc_description":66,"doc_content":67,"file_id":68,"file_url":69,"file_type":70,"file_size":71,"view_count":19,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":19,"language":72,"language_code":73,"site_id":74,"html_lang":73,"table_of_contents":75,"faqs":76,"seo_title":77,"seo_description":66,"update_tm":78,"read_time":52,"preview_page_count":4},502859,687212989558,"EvelynWrites","https://ap-avatar.wpscdn.com/davatar_a8503ba1806abce46bf441b54a3ca4cd","Clear Creek Management Area (CCMA) Asbestos Exposure and Risk Assessment - Frequently Asked Questions","U.S. EPA Region 9 provides frequently asked answers about why and how it assessed asbestos exposure and related human health risks at the Clear Creek Management Area (CCMA). The document explains the regulatory and cleanup context, the 2004–2005 activity-based air sampling during typical recreational activities, and how samples were analyzed for asbestos minerals. It defines activity-based sampling and PCME fiber concepts, including why TEM results are converted to PCME counts to align with health standards and cancer risk evaluation for adults and children.","U.S. Environmental Protection Agency – Region 9  \nClear Creek Management Area (CCMA) Asbestos Exposure and Risk Assessment  \nFrequently Asked Questions  \nQ: Why did EPA do the assessment?  \nA: In the 1991 Record of Decision selecting a cleanup remedy for the Atlas Asbestos Mine Superfund site, which is located within the CCMA, EPA stated that it would evaluate whether the Bureau of Land Management’s (BLM) plans for managing the CCMA were adequate to protect public health from asbestos exposure. Since that time, EPA has monitored BLM’s Resource Management Plan process and has commented on the adequacy of BLM’s management for asbestos exposure. In 2004, as part of the process of evaluating the Atlas Mine cleanup for possible delisting of the site from the federal Superfund list, EPA Region 9 initiated an asbestos exposure and human health risk assessment for the CCMA. The goal of the assessment was to use current asbestos sampling and analytical techniques to update a 1992 BLM Human Health Risk Assessment and provide more robust information to BLM on the asbestos exposures from typical CCMA recreational activities and the potential cancer risks associated with those exposures. In addition, as families are frequent visitors to CCMA, the assessment estimated exposures and potential risks to children (using adult samplers), as well as adults.  \nQ: What did EPA do?  \nA: In 2004 and 2005, Region 9 collected air samples while EPA employees and contractors participated in typical recreational activities at the Clear Creek Management Area. The samples were collected from the breathing zone of individuals riding motorcycles and all-terrain vehicles (ATV), driving and riding in sports utility vehicles (SUV), hiking, camping, sleeping in a tent, fence building, and washing and vacuuming vehicles after use at CCMA. Air filter sample cassettes were placed on adult samplers to collect air samples representing the breathing zone heights of both adults and children and samples were collected for both lead and trailing riders. These activity-based air samples were then analyzed for asbestos.  \nQ: What is activity-based sampling?  \nA: Activity-based sampling (ABS) samples the air in the breathing zone of an individual while that individual participates in typical work or recreational activities. ABS utilizes personal air monitoring, which has been used for decades by industrial hygienists to measure personal exposures in workplace environments. It is well-suited for environmental asbestos exposure measurements, because it captures the asbestos in the personal dust cloud that is generated by activities which disturb asbestos-containing soils, making it a more accurate predictor of exposure than fixed, stationary monitors or soil samples. Activity-based sampling is being used by EPA to evaluate asbestos exposure at a variety of sites across the country and was used by BLM and University of California researchers in earlier investigations at the CCMA. EPA employees conducting the sampling wore small air pumps in backpacks with the filter intakes on the front of the body near the shoulder for the adult samples, and lower on the torso for child  \nsamples. Depending on the activity, the sample pumps ran for 1 – 2 hours, and washing and vacuuming activities were ½ hour.  \nQ: What did EPA sample and how were the samples analyzed?  \nA: EPA sampled for asbestos minerals. There are two families of asbestos minerals, the serpentine family and the amphibole family. Most of the asbestos found at CCMA is chrysotile, a member of the serpentine family, but EPA also found tremolite, actinolite, and other members of the amphibole family. Asbestos derived from these minerals has been associated with asbestos related disease. The analytical method used for the air samples, the International Organization for Standardization (ISO) Method 10312, is a state-of-the-art transmission electron microscopy method for asbestos the allows the analyst to measure every fiber seen ","cbCainctZfIdqrZF","https://ap.wps.com/l/cbCainctZfIdqrZF","pdf",18632,"English","en",105,"# Frequently Asked Questions\n## Why did EPA do the assessment?\n## What did EPA do?\n## What is activity-based sampling?\n## What did EPA sample and how were the samples analyzed?\n## What is a PCME fiber?\n## Why is EPA concerned about the asbestos at CCMA? Isn’t the asbestos natural to the area?","[{\"question\":\"Why did EPA conduct the asbestos exposure and risk assessment for CCMA?\",\"answer\":\"EPA conducted the assessment to evaluate whether BLM’s management plans for the CCMA adequately protect public health from asbestos exposure. It also updated a prior risk assessment using current sampling and analytical techniques and estimated cancer risks for both adults and children.\"},{\"question\":\"What did EPA do during the 2004–2005 sampling?\",\"answer\":\"EPA Region 9 collected air samples while EPA employees and contractors participated in typical recreational activities at CCMA. Samples were taken from participants’ breathing zones during activities such as riding, hiking, camping, sleeping in a tent, fence building, and washing or vacuuming vehicles.\"},{\"question\":\"What is activity-based sampling (ABS) and why is it used?\",\"answer\":\"Activity-based sampling collects air in a person’s breathing zone during typical work or recreational activities using personal air monitoring. It is suited to environmental asbestos measurements because it captures asbestos in the personal dust cloud stirred up by activities, which can better predict exposure than fixed stationary monitors or soil samples.\"},{\"question\":\"What is a PCME fiber and how does it relate to TEM analysis?\",\"answer\":\"PCME refers to a fiber count equivalent used to apply current health standards based on PCM results. Even though EPA used TEM for this assessment (which can detect more and smaller fibers), it counts only fibers that would have been seen by PCM criteria to generate an equivalent PCME count for the risk assessment.\"}]","Clear Creek Management Area (CCMA) Asbestos Exposure and Risk Assessment - Frequently Asked Questions | PDF",1791044799,{"code":4,"msg":80,"data":81},"ok",{"site_id":74,"language":73,"slug":82,"title":65,"keywords":83,"description":66,"schema_data":84,"social_meta":142,"head_meta":144,"extra_data":146,"updated_unix":147},"clear-creek-management-area-ccma-asbestos-exposure-and-risk-assessment-frequently-asked-questions","",{"@graph":85,"@context":141},[86,100,120],{"@type":87,"itemListElement":88},"BreadcrumbList",[89,93,95,98],{"item":90,"name":91,"@type":92,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":94,"name":9,"@type":92,"position":14},"https://docshare.wps.com/document/",{"item":96,"name":35,"@type":92,"position":97},"https://docshare.wps.com/document/healthcare/",3,{"item":99,"name":65,"@type":92,"position":19},"https://docshare.wps.com/document/clear-creek-management-area-ccma-asbestos-exposure-and-risk-assessment-frequently-asked-questions/502859/",{"url":99,"name":65,"@type":101,"image":102,"author":107,"headline":65,"publisher":109,"fileFormat":112,"inLanguage":73,"description":66,"dateModified":113,"datePublished":114,"encodingFormat":112,"isAccessibleForFree":115,"interactionStatistic":116},"DigitalDocument",{"url":103,"@type":104,"width":105,"height":106},"https://docshare.wps.com/thumbnails/clear-creek-management-area-ccma-asbestos-exposure-and-risk-assessment-frequently-asked-questions/502859.png","ImageObject",300,407,{"name":63,"@type":108},"Person",{"url":90,"name":110,"@type":111},"DocShare","Organization","application/pdf","2026-10-22","2026-10-03",true,{"@type":117,"interactionType":118,"userInteractionCount":19},"InteractionCounter",{"@type":119},"ViewAction",{"@type":121,"mainEntity":122},"FAQPage",[123,129,133,137],{"name":124,"@type":125,"acceptedAnswer":126},"Why did EPA conduct the asbestos exposure and risk assessment for CCMA?","Question",{"text":127,"@type":128},"EPA conducted the assessment to evaluate whether BLM’s management plans for the CCMA adequately protect public health from asbestos exposure. It also updated a prior risk assessment using current sampling and analytical techniques and estimated cancer risks for both adults and children.","Answer",{"name":130,"@type":125,"acceptedAnswer":131},"What did EPA do during the 2004–2005 sampling?",{"text":132,"@type":128},"EPA Region 9 collected air samples while EPA employees and contractors participated in typical recreational activities at CCMA. Samples were taken from participants’ breathing zones during activities such as riding, hiking, camping, sleeping in a tent, fence building, and washing or vacuuming vehicles.",{"name":134,"@type":125,"acceptedAnswer":135},"What is activity-based sampling (ABS) and why is it used?",{"text":136,"@type":128},"Activity-based sampling collects air in a person’s breathing zone during typical work or recreational activities using personal air monitoring. It is suited to environmental asbestos measurements because it captures asbestos in the personal dust cloud stirred up by activities, which can better predict exposure than fixed stationary monitors or soil samples.",{"name":138,"@type":125,"acceptedAnswer":139},"What is a PCME fiber and how does it relate to TEM analysis?",{"text":140,"@type":128},"PCME refers to a fiber count equivalent used to apply current health standards based on PCM results. Even though EPA used TEM for this assessment (which can detect more and smaller fibers), it counts only fibers that would have been seen by PCM criteria to generate an equivalent PCME count for the risk assessment.","https://schema.org",{"og:url":99,"og:type":143,"og:title":65,"og:site_name":110,"og:description":66},"article",{"robots":145,"canonical":99},"index,follow",{"doc_id":61,"site_id":74},1792171897]