Category: Assessment & Remediation Projects

Denver Metro Area, Colorado A multi­phase extraction system was designed to address an extensive LNAPL plume spanning multiple off-site properties to dewater the upper low-permeability zone and allow product recovery and vapor extraction in the sand units where the NAPL was trapped. Based on extensive aquifer testing and site characterization, a system of six dual… Continue reading UST Remediation LNAPL Multiphase System

Denver Metro Area, Colorado An air sparge/soil vapor extraction (AS/SVE) remediation system was designed based on pilot test data. A total of 6 AS wells and 5 SVE wells were to remediate gasoline constituents in the groundwater by directly volatilizing the constituents and supplying oxygen for aerobic biodegradation. The work included preparation of construction plans,… Continue reading UST Remediation AS/SVE System

Northwestern Colorado Closures were completed on over 70 produced water holding tanks covering a large area in a remote part of northwestern Colorado. The replacement of the existing culvert pit holding tanks was coordinated with the oil and gas operator to install above-ground tanks with minimal downtime. The tanks and impacted soils above state cleanup… Continue reading E&P Tank Closures

Wyoming A groundwater model was developed to address corrective actions under the WDEQ to provide an understanding of remedial alternatives to prevent off-site migration of contaminated groundwater and LNAPL. A three-dimensional finite-difference groundwater model was used to assist with the design and placement of a groundwater interceptor trench. The model utilized detailed subsurface characterization to… Continue reading Refinery Groundwater Modeling

Wyoming A containment system was designed under a Consent Order with the WDEQ to prevent off-site migration of contaminated groundwater and LNAPL. An alternative evaluation design was used to select a soil bentonite slurry wall with a series of interceptor. Data from a detailed subsurface investigation was used to design a 1,700-foot long by 25-foot… Continue reading Refinery Groundwater Containment System

Western Colorado Groundwater contamination due to migration from a natural gas well along natural fractures resulted in benzene and methane in surface­ water and groundwater. After several years of operating a sparge system with little progress, Rule was selected to provide remediation for the site. Our evaluation concluded that the existing system was not effective… Continue reading E&P Groundwater Remediation