EarthFax provided multi-year assessment, design, and remediation management services at a petroleum refinery located on 600 acres in northern Utah. Our efforts included the performance of a RCRA Facility Assessment that included detailed characterization of 28 solid-waste management units to determine the need for remediation of hazardous and non-hazardous sludges, refuse, spent refinery chemicals, tank bottoms, and waste waters. To support this effort, we conducted bench- and pilot-scale treatability studies to determine the feasibility of various remedial alternatives. We also prepared a refinery-wide numerical groundwater flow and contaminant transport model, evaluated the effects of various remedial-action alternatives on groundwater quality, and determined the need for active remediation of contaminant plumes. Using the data collected during the RFI, we assessed the risk of each unit on human health and the environment. We also successfully negotiated with regulatory authorities to classify groundwater as a separate solid-waste management unit, thereby negating the need to remediate groundwater at each individual location where surface remediation was required.
Following completion of the RFI, EarthFax evaluated the safety, effectiveness, and cost of several remediation alternatives. Working as a member of the client’s team, we prepared construction specifications, bid documents, and engineer’s cost estimates, then supervised corrective-action implementation, provided field modification of designs, and reviewed quality assurance/quality control tests to ensure proper implementation of remedial actions. The majority of the waste was remediated through solidification and on-site disposal in a 140,000 yd3 RCRA (hazardous waste) closure cell and a 230,000 yd3 non-RCRA (non-hazardous waste) closure cell. Our design included combining wastes with widely varying acid-generation potential to support chemical stabilization of the material.
EarthFax assisted the client in obtaining a post-closure permit from the State regulatory agency within 6 years after the RFI process began. Additionally, we successfully negotiated with the agency to reduce ongoing groundwater monitoring requirements from 80 wells sampled on a quarterly basis to 20 wells sampled on an annual basis, with a similar reduction in the number of constituents to be analyzed. The client and regulatory agency jointly presented EarthFax with an award that recognized our commitment to the core values of the project, namely “protecting the environment, honesty, integrity, teamwork, and trust.” We continue to provide environmental engineering support to this client for the remediation of leaks, spills, and other newly-discovered sources of contamination.