Runway 5-23, Avgas Valve Pit Petroleum Controls

Background
In 1994, a product sheen was observed on the groundwater surface in the excavation opened to remove the valve in the valve pit for a closed avgas pipeline. The soil sample collected during the valve removal contained petroleum hydrocarbons greater than state cleanup levels. Investigations began in 1996. Petroleum hydrocarbons in groundwater also exceeded state cleanup levels.
The OU A Record of Decision (ROD) identified monitored natural attenuation (MNA) and institutional controls (ICs) as the interim remedy for this site in 2000. Intermittent free-product recovery was conducted from 1989 to 2000.
Identified Contaminants
Petroleum hydrocarbons in soil and groundwater
Current Actions
The Navy conducts natural attenuation monitoring at two wells annually.
Petroleum Institutional Controls
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Groundwater Restrictions
Domestic use of groundwater in the Downtown Area is restricted because of the potential presence of petroleum compounds and other chemicals in the groundwater. Domestic groundwater use is defined as that used by households or transients for human and animal consumption, cooking, bathing, showering, gardening, irrigation, or use on consumable food products, watering animals and any other domestic use. The excavation notification program at individual sites provides one barrier to drilling; enforcement of the prohibition will also occur through periodic visual inspections. The visual inspections will focus on unauthorized wells in the restricted area. Groundwater use restrictions are included in the equitable servitude.
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Land Use Restrictions
Commercial and industrial land uses and continuing residential land uses where housing exists in the Downtown Area are permitted in accordance with the Interim Conveyance document. Residential housing is allowed in existing housing units located at Amulet Housing, Arctic Acres Housing and SWMU 62. Future residential housing construction will be evaluated for impacts to ongoing petroleum cleanup activities.
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Petroleum Engineering Controls