GEI personnel developed the groundwater remediation component of a multi-faceted remediation/site redevelopment project in Wyoming. The selected remedy for the site included: NAPL recovery (>100 acres), air sparging and vapor extraction (over 20 acres), groundwater extraction and treatment (up to 1,000 gpm), passive bioventing, and monitored natural attenuation (over 300 acres). The selected remedy, which was negotiated with the state under a voluntary corrective action consent order, cost $20 to $40 million less than alternatives originally proposed by the USEPA. Design and installation of the remediation systems were integrated with site development activities, which include an 18-hole golf course. Constituents of concern include benzene, 2-methylnathphalene, and arsenic.
Atlantic Richfield Company
Conceptual site model for LNAPL
Evaluation of site-wide and hot-spot remedial options
Negotiation of groundwater remedy with regulators
Long-term monitoring program