[{"command":"settings","settings":{"basePath":"\/","pathPrefix":"","ajaxPageState":{"theme":"iaqa_u","theme_token":"WJULW1WAiQisQdvGW7YIh0gUt-ArsCCqq0JBMWVs2Xc","jquery_version":"1.10"},"CToolsModal":{"loadingText":"Loading...","closeText":"Close Window","closeImage":"\u003Cimg typeof=\u0022foaf:Image\u0022 class=\u0022img-responsive\u0022 src=\u0022https:\/\/iaqauniversity.org\/sites\/all\/modules\/contrib\/ctools\/images\/icon-close-window.png\u0022 alt=\u0022Close window\u0022 title=\u0022Close window\u0022 \/\u003E","throbber":"\u003Cimg typeof=\u0022foaf:Image\u0022 class=\u0022img-responsive\u0022 src=\u0022https:\/\/iaqauniversity.org\/sites\/all\/modules\/contrib\/ctools\/images\/throbber.gif\u0022 alt=\u0022Loading\u0022 title=\u0022Loading...\u0022 \/\u003E"},"edu-modal-style":{"modalSize":{"type":"fixed","width":"auto","addHeight":700,"height":"auto"},"modalOptions":{"background-color":"black"},"closeText":"\u003Ci class=\u0022fa fa-times-circle\u0022 title=\u0022Close\u0022\u003E\u003C\/i\u003E","loadingText":"","modalTheme":"edu_modal_theme","animation":"fadeIn","animationSpeed":"medium","throbberTheme":"edu_modal_throbber"},"better_exposed_filters":{"views":{"course_modal":{"displays":{"block":{"filters":[]}}}}}},"merge":true},{"command":"modal_display","title":"Successful Vapor Mitigation Via Floor Coating and Engineering Controls: Potential Pitfalls and Lessons Learned","output":"\u003Cdiv class=\u0022view view-course-modal view-id-course_modal view-display-id-block view-dom-id-31d94b161649a13cce6f550258a21274\u0022\u003E\n \n \n \n \u003Cdiv class=\u0022view-content\u0022\u003E\n \u003Cdiv class=\u0022views-row views-row-1 views-row-odd views-row-first views-row-last\u0022\u003E\n \n \u003Cdiv class=\u0022views-field views-field-field-edu-body\u0022\u003E \u003Cdiv class=\u0022field-content\u0022\u003E\u003Cp\u003ESuzi Rosen, Partner Engineering \u0026amp; Science\u003C\/p\u003E\n\u003Cp\u003EPhase II Environmental Site Assessment (ESA) activities for a light industrial building in Los Angeles, California identified volatile organic compounds (VOCs) in the subsurface at levels that indicated a potential indoor air quality (IAQ) concern related to vapor intrusion of VOCs. The application of a floor coating material was part of the building renovation activities. Photoionization detector (PID) measurements were used as a field screening tool prior to, during, and after the application. Extensive preparatory activities were required to condition the floor prior to the application. IAQ sampling was performed two weeks following application, with all samples locations except for one being reduced to below residential screening levels. Engineering controls consisting of modification of the HVAC system were then implemented and a third sampling event showed reduction of VOCs at all sample locations to concentrations below residential screening levels. Although the mitigation approach successfully reduced indoor air VOC concentrations to acceptable levels, there were many challenges and lessons learned throughout the project that caused or had potential to cause significant delay in implementation time.\u00a0\u003C\/p\u003E\n\u003C\/div\u003E \u003C\/div\u003E \u003C\/div\u003E\n \u003C\/div\u003E\n \n \n \n \n \n \n\u003C\/div\u003E"}]