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Soil vapor extraction system installed in sound-insulated shed.

Initial Abatement, Site Characterization & Corrective Action Plans

When a petroleum release or leak is confirmed, the DEQ requires that the condition be stabilized, leaks be stopped and safety issues addressed. Stopping a leak may entail something like turning off a dispenser to emptying a tank. Safety issues are generally those that may pose a fire hazard. These initial responses to a release are discussed in the Initial AbatementMeasures Report.

To determine the extent of an underground release, soil borings may be advanced and soil samples taken and monitoring wells may be installed so that groundwater samples may be taken. Monitoring wells are surveyed in so that groundwater contour maps may be constructed using depth to groundwater data from each well. This will allow the direction of groundwater flow to be determined so that any receptors in that direction may be assessed for impact. The results of groundwater analytical are also mapped so that the extent of the release can be determined. These actions are discussed in the SiteCharacterization Report and recommendations for additional action are made.

If the release is significant, a cleanup may be required. Cleanup actions could be something like excavation of contaminated soils if the release is limited. When the impact on groundwater is more extensive, installation of a remediation system, such as a Dual-Phase Extraction System that removes hydrocarbon vapors and contaminated water, may be required. The recommendations for such actions are discussed in a CorrectiveAction Plan.