Specialists in Environmental Remediation, Natural Resources and Information Management
Based on a previous site investigation, releases from a UST used to store diesel fuel at a power generating facility operated by a regional electric company were documented. Groundwater at the site was impacted and an approximate 3-acre plume of groundwater affected with diesel fuel was defined.
AGES staff designed and constructed a soil and groundwater bioremediation system to address petroleum hydrocarbons in affected portion of the facility. The selected remedial alternative included the high-volume recovery of groundwater (60 gpm) to dewater the contaminant zone and to allow for forced air bioventing. Recovered groundwater was stripped, mixed and aerated at 900 cfm; a large clarification system was installed to handle precipitated iron and manganese. The treated groundwater was then amended with nutrients, heated and re-injected into the aquifer. Based on confirmation sampling, concentrations of constituents of concern were reduced to less than detectable levels.
• By using an integrated approach to the site remediation, AGES was able to expedite the remedial process and reduce concentrations to less than detection.
• In 2001, this site won a national Phoenix Brownfields Award for redevelopment of an industrial site into a community asset.
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