Abstract |
The Operating Industries Inc. (OII) site is a 190-acre landfill located in Monterey Park, California, 10 miles east of Los Angeles. To the northwest and east of the site the land use is primarily industrial; residential units are located to the southwest, east and west of the site. In 1952, the site and additional land, totalling 218 acres, were purchased by OII. The landfill was permitted to accept household refuse, organic refuse, scrap metal, non-decomposable inert solids, and certain types of liquids. In April 1983, OII ceased accepting all liquid wastes; disposal of all solid wastes ended in October 1984. EPA currently is performing operation and maintenance of the existing leachate collection system, perimeter gas extraction system and interior gas extraction system. The selected remedial action at the site includes: installation of perimeter landfill gas (LFG) extraction wells, pile-driven wells on the top deck of the landfill, shallow and deep slope wells to control subsurface migration at the perimeter; and utilization of existing gas extraction wells and gas monitoring probes. |