Natural Attenuation of Elevated Gasoline-Range Hydrocarbons in Groundwater

3 Natural Attenuation of Elevated Gasoline-Range Hydrocarbons in Groundwater 

The sites are two utility maintenance yards that lie adjacent to one another. In both cases the former USTs were excavated and removed, and the hydrocarbon-affected soil surrounding the former USTs was excavated and reused/recycled via incorporation as an ingredient in the production of cold-mix asphalt. 

Natural attenuation was favorably received and approved as an appropriate remedial alternative for these two sites. Periodic gauging and monitoring of key parameters will continue for a minimum period of 2 to 3 years to demonstrate continued stability and/or decline in dissolved BTEX prior to site closure. 

FIGURE 13.12 Areal extent of LNAPL and commingled dissolved hydrocarbon plumes at 

Alleman, B. C. and Leeson, A. (editors), 1999, Natural Attenuation of Chlorinated Solvents, Petroleum Hydrocarbons, and Other Organic Compounds. Battelle Press, Columbus, OH, 402 pp. 

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