{"id":19,"date":"2026-02-04T01:09:13","date_gmt":"2026-02-04T01:09:13","guid":{"rendered":"https:\/\/azmax.top\/blog\/?p=19"},"modified":"2026-02-04T01:09:13","modified_gmt":"2026-02-04T01:09:13","slug":"interpreting-marssim-final-status-survey-units-for-small-irregular-contamination","status":"publish","type":"post","link":"https:\/\/azmax.top\/blog\/interpreting-marssim-final-status-survey-units-for-small-irregular-contamination\/","title":{"rendered":"Interpreting MARSSIM: Final Status Survey Units for Small, Irregular Contamination"},"content":{"rendered":"<p>I&#8217;m planning a <strong>final status survey<\/strong> for a small concrete pad (approx. 10m x 10m) used for temporary storage of potentially contaminated components. Scans identified two isolated <strong>beta-gamma hotspots<\/strong> (each &lt;100 cm\u00b2). The rest of the area is background.<\/p>\n<p><strong>Approach:<\/strong> Following <strong>MARSSIM<\/strong>, I&#8217;m using a <strong>grid-based<\/strong> approach for the Class 1 area.<\/p>\n<p>For the two small hotspots, does it make more sense to:<br \/>\n1. Treat each as its own <strong>separate survey unit<\/strong> (SU) due to their distinct, elevated activity?<br \/>\n2. Include them within the larger grid SU and just ensure the statistical test (e.g., Sign test) still passes with their elevated DCGL values?<\/p>\n<p>Looking for practical experience on how this is typically justified in an FSS report to satisfy regulator expectations.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>I&#8217;m planning a final status survey for a small concrete pad (approx. 10m x 10m) used for temporary storage of potentially contaminated components. Scans identified two isolated beta-gamma hotspots (each &lt;100 cm\u00b2). The rest of the area is background. Approach: Following MARSSIM, I&#8217;m using a grid-based approach for the Class 1 area. For the two &hellip; <a href=\"https:\/\/azmax.top\/blog\/interpreting-marssim-final-status-survey-units-for-small-irregular-contamination\/\" class=\"more-link\">Continue reading <span class=\"screen-reader-text\">Interpreting MARSSIM: Final Status Survey Units for Small, Irregular Contamination<\/span> <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[13],"tags":[],"class_list":["post-19","post","type-post","status-publish","format-standard","hentry","category-ask"],"_links":{"self":[{"href":"https:\/\/azmax.top\/blog\/wp-json\/wp\/v2\/posts\/19","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/azmax.top\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/azmax.top\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/azmax.top\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/azmax.top\/blog\/wp-json\/wp\/v2\/comments?post=19"}],"version-history":[{"count":1,"href":"https:\/\/azmax.top\/blog\/wp-json\/wp\/v2\/posts\/19\/revisions"}],"predecessor-version":[{"id":20,"href":"https:\/\/azmax.top\/blog\/wp-json\/wp\/v2\/posts\/19\/revisions\/20"}],"wp:attachment":[{"href":"https:\/\/azmax.top\/blog\/wp-json\/wp\/v2\/media?parent=19"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/azmax.top\/blog\/wp-json\/wp\/v2\/categories?post=19"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/azmax.top\/blog\/wp-json\/wp\/v2\/tags?post=19"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}