||Superfund explanation of significant difference for the record of decision : Purity Oil Sales, Inc., Malaga, CA.
||United States. Environmental Protection Agency.
|| U.S. Environmental Protection Agency, Office of Emergency and Remedial Response] ; Reproduced by the National Technical Information Service,
Hazardous waste sites--California.
Hazardous materials ;
Land pollution control ;
Polycyclic aromatic hydrocarbons ;
Soil contamination ;
Soil gases ;
Soil treatment ;
Monitoring wells ;
ESD(Explanation of Significant Difference) ;
Explanation of Significant Difference ;
Second Remedial Action ;
Record of Decision ;
Fresno County(California) ;
Landfill gases ;
Volatile organic compounds ;
Soil vapor extraction ;
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
||6 p. : ill. ; 28 cm.
This ESD describes changes to the remedial action that was selected in the 1992 Record of Decision for the Soils Operable Unit (OU2). This ESD is based upon pre-design data which was collected at the site during 1994 and 1995. We plan to modify the edges of the RCRA-equivalent closure cover to eliminate the need for a retaining wall. We plan to extend the cover to the rear of the Golden State Market, which is currently adjacent to the site at the northeastern boundary. Gas collected from beneath the closure cover will be monitored, but is not now of either sufficient quantity or concentration to warrant treatment. We also plan to decrease the number of soil vapor extraction wells from 58 to 4 based upon held soil permeability measurements. In addition, because groundwater concentrations appear to have decreased to near MCLs since the extraction and treatment system has been operating, we plan to collect soil vapor data after installation of the cover is complete.
Cover title. "7/3/1996." "March 1997." "PB96-963124." "EPA/ESD/R09-96/158."