{"id":7680,"date":"2025-08-02T21:55:36","date_gmt":"2025-08-02T21:55:36","guid":{"rendered":"https:\/\/geoambient.cat\/?post_type=referencies&#038;p=7680"},"modified":"2025-08-02T21:59:40","modified_gmt":"2025-08-02T21:59:40","slug":"projet-integre-de-remediation-des-sols-et-des-eaux-souterraines-sur-un-site-industriel-affecte-par-un-deversement-de-composes-organiques-volatils-et-de-metaux-lourds","status":"publish","type":"referencies","link":"https:\/\/geoambient.cat\/fr\/referencies\/projet-integre-de-remediation-des-sols-et-des-eaux-souterraines-sur-un-site-industriel-affecte-par-un-deversement-de-composes-organiques-volatils-et-de-metaux-lourds\/","title":{"rendered":"Projet int\u00e9gr\u00e9 de rem\u00e9diation des sols et des eaux souterraines sur un site industriel affect\u00e9 par un d\u00e9versement de compos\u00e9s organiques volatils et de m\u00e9taux lourds"},"content":{"rendered":"\n<p><strong>Project type:<\/strong> Remediation of saturated and unsaturated zones contaminated by heavy metals, hydrocarbons, BTEX, CVOCs, and ketones.\u00a0<br><strong>Contamination plume in groundwater:<\/strong> 25,000 m\u00b2\u00a0<br><strong>Affected soil surface area:<\/strong> 1,800 m\u00b2\u00a0<\/p>\n\n\n\n<p><\/p>\n\n\n\n<p><strong>Conceptual framework:<\/strong>&nbsp;<\/p>\n\n\n\n<p><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Industrial site for liquid compound recycling. Pollution caused by a point discharge of stored compounds as a result of a fire. The spilled substances reached the river, surrounding areas, streets, and the aquifer.\u00a0<\/li>\n\n\n\n<li>Project duration: 4 years.\u00a0<\/li>\n<\/ul>\n\n\n\n<p><\/p>\n\n\n\n<p><strong>Remediation:<\/strong>&nbsp;<\/p>\n\n\n\n<p><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Preliminary delineation of contamination plume in both soil and groundwater.\u00a0<\/li>\n\n\n\n<li>On-site pilot tests to determine the scale of the pumping and soil treatment system.\u00a0<\/li>\n\n\n\n<li>Installation of a treatment system with 12 pumping wells.\u00a0<\/li>\n\n\n\n<li>Soil stockpiles for treatment, aiming to reduce the volume requiring management.\u00a0<\/li>\n\n\n\n<li>Excavation and direct management of highly contaminated soils.\u00a0<\/li>\n\n\n\n<li>Treatment system including decantation, phase separation, stripping, and activated carbon.\u00a0<\/li>\n\n\n\n<li>Venting\/sparging treatment at the contamination source.\u00a0<\/li>\n<\/ul>\n\n\n\n<p><\/p>\n\n\n\n<p><strong>Objective:<\/strong>&nbsp;<\/p>\n\n\n\n<p><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Reduction of dissolved compounds to concentrations below the established remediation targets.\u00a0<\/li>\n\n\n\n<li>Removal of contaminated soils in the river area.\u00a0<\/li>\n\n\n\n<li>Selective excavation in the contamination hotspot.\u00a0<\/li>\n<\/ul>\n\n\n\n<p><\/p>\n\n\n\n<p><strong>Data:<\/strong>&nbsp;<\/p>\n\n\n\n<p><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Groundwater plume: 25,000 m\u00b2\u00a0<\/li>\n\n\n\n<li>Treated water volume: 3,500 m\u00b3\u00a0<\/li>\n\n\n\n<li>Treated vapor volume: 1,143,300 m\u00b3\u00a0<\/li>\n\n\n\n<li>Excavated non-hazardous soil: 1,671 T\u00a0<\/li>\n\n\n\n<li>Excavated hazardous soil: 106 T\u00a0<\/li>\n\n\n\n<li>Treated and reused soil on-site: 400 m\u00b3\u00a0<\/li>\n<\/ul>\n\n\n\n<p><\/p>\n\n\n\n<p><strong>Emergency actions:<\/strong>&nbsp;<\/p>\n\n\n\n<p><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Delimitation and removal of 250 m\u00b3 of contaminated soil in and around the riverbed.\u00a0<\/li>\n\n\n\n<li>Soil replacement.\u00a0<\/li>\n\n\n\n<li>Replanting of vegetation.\u00a0<\/li>\n\n\n\n<li>Installation of a hydraulic barrier for containment.\u00a0<\/li>\n<\/ul>\n\n\n\n<p><\/p>\n\n\n\n<p><strong>Groundwater remediation:<\/strong>&nbsp;<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Water treatment system via pump &amp; treat with 12 pumping wells distributed across the entire plume area, using 3\u201d pumps. Functions as a downstream hydraulic barrier and treatment extraction system.\u00a0<\/li>\n\n\n\n<li>Treatment starts with decantation and homogenization in a 30 m\u00b3 tank with level sensors to prevent overflow. Transfer pumps feed a stripping tower (capacity 36 m\u00b3\/h), separating volatile and liquid phases.\u00a0<\/li>\n\n\n\n<li>The volatile phase is filtered through air activated carbon filters before atmospheric release.\u00a0<\/li>\n\n\n\n<li>The liquid phase passes through a coalescing hydrocarbon separator, then through a 17 m\u00b3 water filter containing 8.5 T of activated carbon.\u00a0<\/li>\n\n\n\n<li>Finally, treated water is stored in a 30 m\u00b3 buffer tank (3-hour retention capacity), monitored by a continuous COD analysers (15-min readings). Discharge is permitted when COD is below the threshold. The system automatically stops and retains the water if limits are exceeded.\u00a0<\/li>\n<\/ul>\n\n\n\n<p><\/p>\n\n\n\n<p>Remediation goals achieved after 3 years of treatment.\u00a0<\/p>\n\n\n\n<p><\/p>\n\n\n\n<p><strong>Soil remediation:<\/strong>&nbsp;<br>Selective excavation according to disposal route.&nbsp;<br>For less contaminated soils with reuse potential, vapor extraction is applied using a biopile to eliminate volatile compounds.&nbsp;<\/p>\n","protected":false},"featured_media":5252,"template":"","categoria_referencia":[69],"class_list":["post-7680","referencies","type-referencies","status-publish","has-post-thumbnail","hentry","categoria_referencia-sols-contamines"],"acf":[],"_links":{"self":[{"href":"https:\/\/geoambient.cat\/fr\/wp-json\/wp\/v2\/referencies\/7680","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/geoambient.cat\/fr\/wp-json\/wp\/v2\/referencies"}],"about":[{"href":"https:\/\/geoambient.cat\/fr\/wp-json\/wp\/v2\/types\/referencies"}],"version-history":[{"count":3,"href":"https:\/\/geoambient.cat\/fr\/wp-json\/wp\/v2\/referencies\/7680\/revisions"}],"predecessor-version":[{"id":7687,"href":"https:\/\/geoambient.cat\/fr\/wp-json\/wp\/v2\/referencies\/7680\/revisions\/7687"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/geoambient.cat\/fr\/wp-json\/wp\/v2\/media\/5252"}],"wp:attachment":[{"href":"https:\/\/geoambient.cat\/fr\/wp-json\/wp\/v2\/media?parent=7680"}],"wp:term":[{"taxonomy":"categoria_referencia","embeddable":true,"href":"https:\/\/geoambient.cat\/fr\/wp-json\/wp\/v2\/categoria_referencia?post=7680"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}