Record Display for the EPA National Library Catalog


Main Title Explanation of significant difference for the superfund record of decision : Commencement Bay, South Tacoma Channel, Tacoma, WA.
CORP Author Environmental Protection Agency, Washington, DC. Office of Emergency and Remedial Response.
Publisher [U.S. Environmental Protection Agency, Office of Emergency and Remedial Response],
Year Published 1999
Report Number EPA/541/R-99/065
Stock Number PB99-963114
OCLC Number 47067583
Subjects Hazardous waste sites--Washington
Additional Subjects Superfund ; Hazardous materials ; Waste management ; Commencement Bay ; Benzene ; Toluene ; Xylene ; Ethyl benzene ; Ethanes ; Hydrocarbons ; Ground water ; Restrictions ; Site characterization ; Remedial action ; Washington ; ESD(Explanation of Significant Difference) ; Explanation of Significant Difference ; Record of Decision ; South Tacoma Field ; Tacoma(Washington) ; Pierce County(Washington) ; Volatile organic compounds ; Natural attenuation ; Cleanup operations
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EJBD ARCHIVE EPA 541-R-99-065 Headquarters Library/Washington,DC 04/19/2017
NTIS  PB99-963114 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 12 pages : illustrations, maps ; 28 cm
This document presents an Explanation of Significant Differences (ESD) from the Record of Decision (ROD) for South Tacoma Field, which was signed by the United States Environmental Protection Agency in September 1994. In addition to source removal during underground storage tank (UST) excavations, groundwater contaminant levels have greatly decreased since the Remedial Investigation in the early 90's. The responsible parties have investigated the area and found that the contamination is isolated and the levels have dropped. Because of this, the responsible parties asked EPA to re-evaluate the need to install the air sparging and vapor extraction systems. EPA has determined that these systems are no longer necessary to address the groundwater contamination at Pioneer. This ESD changes the selected remedy at Pioneer from air sparging and vapor extraction to monitored natural attenuation and institutional controls.
Cover title. "9/29/1999." "PB99-963114." "EPA/541/R-99/065." "1999." Microfiche.