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Pacific Southwest, Region 9: Superfund

Serving Arizona, California, Hawaii, Nevada, the Pacific Islands, and Tribal Nations

Phoenix-Goodyear Airport Area

Superfund Site

Explanation of Significant Differences #2

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

AbbreviationMeaning
appappendix
attchsattachments
enclsenclosures
EPAEnvironmental Protection Agency
LtrLetter
rptreport
SDGSample delivery group
TCETrichloroethylene
TLTransmittal letter
VLEACHModel for assessing effects on groundwater from volatile contaminants leaching through vadose zone
VOCVolatile organic compound
w/with

Administrative Record Index

Doc DateAuthor / Author AffiliateAddressee / Addressee AffiliateSubjectAR #Doc ID
0000/00/00M Chapman / Scotts Graphics, Inc-Article: Lessons fr carbon bed adsorption losses00010217-00109
0000/00/00A Naujokas / Eastman Kodak Co-Article: Preventing carbon bed combustion problems00020217-00110
1985/04/00A Naujokas / Eastman Kodak Co-Article: Spontaneous combustion of carbon bed (Plant/Operations Progress, 4/85: 120-126)00030217-00108
1990/03/00Joseph Tessitore / Cross/Tessitore & Assoc-Article: Thermal destruction of organic air toxics (Pollution Engineering, 3/90: 58-68)00040217-00105
1990/04/16Stephen Cleveland / City of Goodyear, AZCraig Cooper / Environmental Protection Agency - Region 9City of Goodyear proposal for end use water & irrigation alternatives, w/appendix, oversized map, & TL fr S Cleveland to C Cooper (doc date fr TL)00050217-00111
1992/02/07Daniel Herbert / Malcolm Pirnie, IncCraig Cooper / Environmental Protection Agency - Region 9TL: Transmits technical articles referenced in Evaluation of Alternatives for Treatment of Extracted Soil Vapor during SVE Testing00060217-00106
1992/02/07Craig Cooper / Environmental Protection Agency - Region 9William Donahue / Unidynamics Phoenix, IncLtr: Comments on 10/91 quarterly groundwater sampling rpt00070217-90036
1992/02/11Daniel Hebert / Malcolm Pirnie, IncWilliam Donahue / Unidynamics Phoenix, IncLtr: Transmits description of work prepared for special sampling event 2/12/92 w/encl00080217-00101
1992/02/13Moses Olade / AZ Dept of Environmental QualityCraig Cooper / Environmental Protection Agency - Region 9Ltr: Transmits analytical results of groundwater samples fr Unidynamics special sampling event 2/92 w/encl & w/TL fr K DeWhitt to W Turner 3/3/9200090217-00099
1992/03/03Daniel Hebert / Malcolm Pirnie, IncWilliam Donahue / Unidynamics Phoenix, IncLtr: Reports results of special groundwater sampling event conducted 2/12/9100100217-00095
1992/03/09Craig Cooper / Environmental Protection Agency - Region 9William Donahue / Unidynamics Phoenix, IncLtr: Approves special sampling event for MW-4, MW-7 & MW-8 wells00110217-90038
1992/03/13Malcolm Pirnie, Inc-Evaluation of alternatives for treatment of extracted soil vapor during SVE (soil vapor extraction) pilot testing00120217-00091
1992/04/07Craig Cooper / Environmental Protection Agency - Region 9William Donahue / Unidynamics Phoenix, IncLtr: Soil vapor extraction (SVE) pilot testing (US Amended Admin Order Docket #90-20)00130217-90030
1992/04/07Craig Cooper / Environmental Protection Agency - Region 9William Donahue / Unidynamics Phoenix, IncLtr: Soil vapor extraction (SVE) pilot testing00140217-90037
1992/04/20Bill Donahue / Unidynamics Phoenix, IncCraig Cooper / Environmental Protection Agency - Region 9Ltr: Proposed revision to test methods00150217-90039
1992/06/00AZ Dept of Environmental Quality-Human health-based guidance levels for ingestion of contaminants in drinking water & soil00160217-00107
1992/07/00Malcolm Pirnie, Inc-Health & safety plan: Soil vapor extraction (SVE) remedial design & operation activities (revised 7/31/91) w/TL fr D Hebert to C Cooper 7/30/9200170217-00092
1992/07/08William Donahue / Unidynamics Phoenix, IncCraig Cooper / Environmental Protection Agency - Region 9Monthly rpts for remedial activities for 5/92-7/92, dated 6/9/92 & 7/8/92 (Admin Order Docket #90-20)00180217-00090
1992/07/21Craig Cooper / Environmental Protection Agency - Region 9William Donahue / Unidynamics Phoenix, IncLtr: Follow-up issues to 6/25/92 mtg including VLEACH rpt, SVE pilot program, & gw remedy00190217-90032
1992/08/00Malcolm Pirnie, Inc-Soil vapor extraction (SVE) pilot testing program description & interim routine sampling program at Unidynamics w/TL fr W Donahue to C Cooper 8/31/9200200217-00089
1992/08/11Craig Cooper / Environmental Protection Agency - Region 9William Donahue / Unidynamics Phoenix, IncLtr: Soil vapor extraction (SVE) pilot testing program00210217-90029
1992/08/25Daniel Hebert / Malcolm Pirnie, IncWilliam Donahue / Unidynamics Phoenix, IncLtr: Transmits results fr re-sampling & analysis of MW-4, MW-7 & MW-8 wells w/encls & ltr fr J Harlan to C Gordon 8/19/9200220217-00100
1992/08/28Craig Cooper / Environmental Protection Agency - Region 9William Donahue / Unidynamics Phoenix, IncLtr: Soil vapor extraction (SVE) pilot testing prog (US Amended Admin Order Docket #90-20)00230217-90031
1992/10/00Malcolm Pirnie, IncEnvironmental Protection Agency - Region 9Final groundwater sampling rpt00240217-00096
1992/11/03Byron James / AZ Dept of Environmental QualityCraig Cooper / Environmental Protection Agency - Region 9Ltr: Transmits sampling & analysis of irrigation & drinking water supply wells at Park Shadows Apartments, Goodyear, AZ w/encls00250217-00098
1992/11/10Daniel Hebert / Malcolm Pirnie, IncCraig Cooper / Environmental Protection Agency - Region 9Ltr: Transmits copy of revised soil vapor extraction (SVE) pilot testing program description w/encl00260217-00097
1992/11/16Todd Struttman / Sharp & Assoc, IncCraig Cooper / Environmental Protection Agency - Region 9Ltr: Transmits revised conceptual (30%) design rpt for groundwater remedy, 2 oversize maps, & Goodyear comments on design rpt w/encls00270217-00102
1992/11/24Craig Cooper / Environmental Protection Agency - Region 9William Donahue / Unidynamics Phoenix, IncLtr: Revised Soil vapor extraction (SVE) pilot testing program00280217-90035
1993/02/00Malcolm Pirnie, IncUnidynamics Phoenix, IncSoil vapor extraction (SVE) pilot testing rpt00290217-00112
1993/02/02Environmental Protection Agency - Region 9-Selected guidance documents, Explanation of Significant Differences (ESD), 2/9300300217-90040
1993/02/17Lawrence Smith / U R S Consultants, IncCraig Cooper / Environmental Protection Agency - Region 9Ltr: Transmits analytical data for City of Goodyear municipal wells & for Park Shadows Apartments wells w/encl00310217-90042
1993/02/18Lawrence Smith / U R S Consultants, IncCraig Cooper / Environmental Protection Agency - Region 9Ltr: Reviews groundwater remedy phase 1 design analysis & need for granular activated carbon polishing (GAC)00320217-90044
1993/03/00Craig Cooper / Environmental Protection Agency - Region 9-Proposed Explanation of Significant Differences #2 (ESD #2) for Final Remedy Record of Decision00340217-00113
1993/03/00Environmental Protection Agency - Region 9-Public notice of availability of proposed Explanation of Significant Differences (ESD) for cleanup of PGA Superfund Site00330217-90041
1993/03/10Environmental Protection Agency - Region 9-Public mtg re 3/93 Explanation of Significant Differences (ESD) (transcript)00350217-00116
1993/03/16Mason Bolitho / AZ Dept of Water ResourcesCraig Cooper / Environmental Protection Agency - Region 9Ltr: Comments on explanation of significant differences (ESD)00360217-90046
1993/03/19Bryon James / AZ Dept of Environmental QualityCraig Cooper / Environmental Protection Agency - Region 9Ltr: Transmits comments on explanation of significant differences (ESD), w/encl00370217-90047
1993/03/31Stephen Cleveland / City of Goodyear, AZCraig Cooper / Environmental Protection Agency - Region 9Ltr: Comments on explanation of significant differences (ESD)00380217-90048
1993/05/00Craig Cooper / Environmental Protection Agency - Region 9-Explanation of significant differences #2 (ESD #2) for final remedy record of decision (ROD)00390217-00119
1993/05/00Environmental Protection Agency - Region 9-Public notice of availability of explanation of significant differences (ESD) for cleanup of site00400217-90049

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