Guayama, Puerto Rico

SITE LOCATION:

Guayama, Puerto Rico – Refinery site located on the south coast of Puerto Rico

SITE BACKGROUND:

This petroleum refinery was under a consent order issued by EPA Region 2 to remediate numerous releases of petroleum hydrocarbons. The site is under the jurisdiction of the RCRA Programs Branch of the EPA. Numerous releases had occurred in the processing area and pipelines on the site and from overfilling of large capacity holding tanks.

GEOLOGY:

The geologic setting consists of a mixture of alluvial and fluvial deposits with steep topography to the north and the beach on the southern property boundary. The groundwater and SPH exist at shallow depths ranging from 16 to 25 feet below the land surface.

PLUME DESCRIPTION:

Numerous comingled plumes, primarily consisting of benzene and toluene, measured nearly 25 acres (gross) in aerial extent.

PRIOR REMEDIAL EFFORTS:

Air sparging system

EFR^® EFFECTIVENESS:

EcoVac Services Inc. was contracted to provide EFR® services and training to site personnel for long term remediation of SPH across the site using a combination of monitor and recovery wells for extraction of contaminant liquids and incineration of vapors. The EFR® process was continued for approximately six years andrecovered over 629,054 equivalent gallons of benzene/toluene.