Pacific Southwest, Region 9: Superfund
Serving Arizona, California, Hawaii, Nevada, the Pacific Islands, and Tribal Nations
Phoenix-Goodyear Airport Area
Explanation of Significant Differences #3
Administrative Record Index
To request copies of administrative record documents, an electronic order form is available.
The Phoenix-Goodyear Airport Area Superfund Site administrative record contains documents arranged in chronological order from September 1983 to September 2002. The original administrative record file was compiled prior to the September 1989 Record of Decision (ROD) and consists of documents AR#1 - AR #44.
Phoenix-Goodyear Airport Area Superfund Site is located in Goodyear, Arizona and is divided into two components. The northern portion of the site consists of Unidynamics-Phoenix, Incorporated property and groundwater contamination emanating from the property. The southern portion of the site consists of the Loral Defense Systems and the Phoenix-Goodyear Airport property, as well as groundwater contamination emanating from these areas (see attached map).
On September 26, 1989, the United States Environmental Protection Agency (EPA) signed a ROD for the final remedy at the Site. The ROD is an EPA document which defines the remedy necessary to protect human health and the environment. The State of Arizona concurred with the remedy selected in the 1989 ROD. In January 1991, EPA issued an Explanation of Significant Differences (ESD) #1 to explain five significant, but not fundamental, differences between the final remedy selected in the 1989 ROD and the final remedy as it would be implemented at the Site. In May 1993, April 1996, and March 1998, EPA issued ESDs #2, #3 and #4 respectively, which described several other changes to the remedy selected in the ROD.
ESD #5 (AR #14) reverses certain of the changes described in ESD #3. Specifically, ESD #3, in part, changed the air emissions treatment for the soil gas remedy at the northern portion of the Site to thermal oxidation. ESD #5, in turn, returns the air emissions treatment system to a carbon system as originally selected in the 1989 ROD.
The list of U.S. Environmental Protection Agency guidance documents which were considered or relied upon in the selection of the remedy is document AR #12 in the administrative record index of ESD #3. Copies of the guidance documents are contained in the Compendium of CERCLA Response Selection Guidance Documents located in the Region 9 Superfund Records Center in San Francisco.
September 24, 2002
List of Abbreviations and Acronyms Used in Administrative Record Index
|EPA||Environmental Protection Agency|
|SDG||Sample delivery group|
|VLEACH||Model for assessing effects on groundwater from volatile contaminants leaching through vadose zone|
|VOC||Volatile organic compound|
Administrative Record Index
|Doc Date||Author / Author Affiliate||Addressee / Addressee Affiliate||Subject||AR #||Doc ID|
|1995/05/01||Scott Zachary / Metcalf & Eddy, Inc||Craig Cooper / Environmental Protection Agency - Region 9||TL: Support material for inclusion of air sparging in explanation of significant difference (ESD) #3, w/attch||0001||0217-90076|
|1995/05/02||Sharp & Assoc, Inc||-||Chromium removal options for well E-17||0002||0217-90080|
|1995/07/21||Metcalf & Eddy, Inc||Environmental Protection Agency - Region 9||Addendum A (appendix J) - Subunit A groundwater remedy acceleration air sparging system design, w/4 drawings, coversheet & TL to C Cooper fr S Zachary||0003||0217-00162|
|1995/07/26||N T E C Solutions Inc||-||Advanced affinity chromatography||0004||0217-90081|
|1995/07/30||Craig Cooper / Environmental Protection Agency - Region 9||Mark Whitmore / Goodyear Tire & Rubber Co||Ltr: Final approval of SVE final design - polygon 96/92/27A per final remedy consent decree (01 RD complete 03)||0005||0217-90075|
|1995/09/01||Sharp & Assoc, Inc||Environmental Protection Agency - Region 9||Proposed chromium treatment system for well E-17, w/TL to N Moore fr T Struttmann 9/5/95||0006||0217-00163|
|1995/09/28||Nancy Moore / AZ Dept of Environmental Quality||Rusty Harris-Bishop / Environmental Protection Agency - Region 9||Ltr: Arizona approval of explanation of significant difference (ESD) #3, w/ltr fr M Bolitho to N Moore & TL||0007||0217-90077|
|1995/12/22||Keith Takata / Environmental Protection Agency - Region 9||-||Explanation of significant differences (ESD) #3||0008||0217-00161|
|1995/12/22||Environmental Protection Agency - Region 9||-||Public notice: EPA announces availability of explanation of significant differences (ESD) #3||0009||0217-90090|
|1996/01/03||Elliott Freireich / West Valley Business (Newspaper)||-||Public notice: Affidavit of publication for EPA announcement of explanation of significant differences (ESD) #3 availability||0010||0217-90091|
|1996/01/04||Tom Bianco / Arizona Republic (Newspaper)||-||Public notice: Affidavit of publication for EPA announcement of explanation of significant differences (ESD) #3 availability||0011||0217-90092|
|1996/04/05||Environmental Protection Agency - Region 9||-||Index of selected CERCLA guidance documents for ESD #3||0012||0217-90093|