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Pacific Southwest, Region 9: Superfund

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Aerojet General Corp.

Superfund Site

Remedial Perimeter Groundwater OU

Administrative Record Index

To request copies of administrative record documents, an electronic order form is available.

This administrative record file contains the documents that the U.S. Environmental Protection Agency (EPA) is currently using to identify appropriate remedial activities for the Aerojet General Corp. (Rancho Cordova) Superfund site, Perimeter Groundwater Operable Unit in Rancho Cordova, California. It is presented in compact disc (CD) format. The administrative record file will be supplemented periodically to include additional documents such as public comments on EPA's Proposed Plan, EPA's response to comments, and the Record of Decision (ROD).
This administrative record file also includes by reference the documents in the Aerojet General Corp. (Rancho Cordova) Superfund Site, Western Groundwater Operable Unit Administrative Record.

Other information, documents and underlying data pertinent to the entire Aerojet Superfund Site and the Perimeter Groundwater Operable Unit are available in the Aerojet site file at EPA’s Superfund Record Center. Please call 415-536-2000.

EPA welcomes questions and comments on documents contained in the administrative record file. Please contact:

Kevin Mayer
Remedial Project Manager
U.S. EPA (SFD-7-2)
75 Hawthorne Street
San Francisco, CA 94105-3972
(415) 972-3176
mayer.kevin@epa.gov
or:Jacqueline Lane
Community Involvement Coordinator
U.S. EPA (SFD-6-3)
75 Hawthorne Street
San Francisco, CA 94105-3972
(415) 972-3236 or (800) 231-3075
lane.jackie@epa.gov

List of Abbreviations and Acronyms Used in Administrative Record Index

ABBREVIATIONMEANING
appAppendix
attch(s) Attachment(s)
CAGCommunity Advisory Group
encl(s) Enclosure(s)
EPA Environmental Protection Agency
et alAnd Others
fr From
ftFeet
GETGroundwater Extraction & Treatment
in Inches
ltr Letter
memo Memorandum
MSMicrosoft
mtgMeeting
NDMAN-Nitrosodimethylamine
NPDES National Pollutant Discharge Elimination System
OU Operable Unit
pdfPortable Document Format
PGOUPerimeter Groundwater OU
pp Pages
pptParts Per Trillion
QAPPQuality Assurance Project Plan
RdRoad
re Regarding
revRevision
RI/FSRemedial investigation / Feasibility study
rpt Report
SSouth
TL(s)Transmittal letters
WWest
w/ With
w/oWithout

Administrative Record Index

Doc_dateAuthorAddresseeTitle_subjectDocid
6/23/1989US District Court - Eastern District of California-Partial consent decree (CD) #CIVS-86-0063-EJG & -0064-EJG as modified following public comment, USA et al v Aerojet-General Corp & Cordova Chemical Co, w/exhibits 1-752432
7/20/2001Keith Takata / Environmental Protection Agency - Region 9-Record of decision (ROD) western groundwater OU (OU-3), w/app A (response summary), TL to C Conley fr C Berrey 7/23/01, & mail receipt #P274 218 48388086208
4/15/2002US District Court - Eastern District of California-Consent Decree (CD) #CIVS-86-0063-EJG & -0064-EJG, stipulation & order modifying partial consent decree, USA et al v Aerojet-General Corp & Cordova Chemical Co, w/exhibits112999
8/9/2002Environmental Protection Agency - Region 9-Administrative order #2002-13 for RD & RA, w/attchs 1 & 2, & TL to J Uranga fr J Diamond, w/o mail receipt118972
6/11/2004Cindy Caulk / Aerojet General CorpCharles Berrey / Environmental Protection Agency - Region 9TL: Updated Aerojet Laboratory analytical method (standard operating procedure) for hexavalent chromium, w/marginalia2058794
12/22/2004Charles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General CorpMemo: Transmits & discusses review of Aerojet response to comments on 8/6/04 quality assurance implementation rpt, w/encl2058785
1/5/2005Charles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General CorpLtr: Agency reassessment of 12/94 Aerojet rpt re sitewide background levels of soil trace elements, w/attchs2058784
1/19/2005Cindy Caulk / Aerojet General CorpCharles Berrey / Environmental Protection Agency - Region 9Memo: Transmits & discusses 5/28/04 Aerojet analytical data validation rpt & table summarizing analyses performed during 2003, w/marginalia, w/o encls2058786
2/1/2005Charles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General CorpEmail: 1/19 memo to C Berrey did not have enclosures noted (5/28/04 Aerojet analytical data validation rpt & table summarizing analyses performed during 2003)2058787
2/4/2005Charles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General CorpLtr: Comments on 1/13/05 draft Aerojet landfill site RI/FS workplan2058776
2/7/2005Cindy Caulk / Aerojet General CorpCharles Berrey / Environmental Protection Agency - Region 9Ltr: Approval of updated laboratory standard operation procedure (SOP) #ES-170-PAL-IM-0017, rev 10 for hexavalent chromium - transmits SOP, w/o encl2058796
2/7/2005Alexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General CorpLtr: Comments on draft Aerojet landfill site RI/FS workplan, waste management units 1, 2, 3 & 42058777
2/9/2005Cindy Caulk / Aerojet General CorpAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley Region
Ed Cargile / CA Environmental Protection Agency - Dept of Toxic Substances Control
Charles Berrey / Environmental Protection Agency - Region 9
Ltr: Response to 12/7/04 agency comments on groundwater modeling QAPP, w/attch2058795
2/28/2005Cindy Caulk / Aerojet General CorpStan Smucker / Environmental Protection Agency - Region 9TL: Electronic & paper copy of Part 1, Appendix E, Baseline risk assessment & paper copy of Part 2, RI/FS rpt for PGOU soil sites in areas 20, 21 & 492058778
3/2/2005Cindy Caulk / Aerojet General CorpCharles Berrey / Environmental Protection Agency - Region 9TL: 6 electronic copies of perimeter groundwater OU RI/FS, part 1 groundwater & part 2 soils2058781
3/3/2005Kerik Kouklis / Aerojet General CorpAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionLtr: Revised workplan for monitor well installation, White Rock North dump, w/attch2058782
5/12/2005David Berry / CA Environmental Protection Agency - Dept of Toxic Substances Control
J Eichelberger / CA Environmental Protection Agency - Dept of Toxic Substances Control
Ed Cargile / CA Environmental Protection Agency - Dept of Toxic Substances ControlMemo: Review of RI/FS workplan - source area OUs, w/TL to C Fennessey fr E Cargile 5/20/052069875
6/1/2005Aerojet General Corp-Field sampling plan for validation of Johnson & Ettinger model, w/TL to C Berrey, et al fr C Caulk 6/27/052085609
6/24/2005Sacramento County - Dept of Environmental Review & Assessment-Public Notice: Notice of preparation of draft environmental impact rpt for Easton project, w/marginalia2085633
7/1/2005Robert Borch / GeoSyntec Consultants, Inc
Scott Neville / Aerojet General Corp - Environmental Operations
-Workplan to determine background metals in surface soils at site main plant, w/TL to C Berrey, et al fr C Caulk 7/22/052085604
7/6/2005Charles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General CorpLtr: Approves 2 month delay in submittal of annual paragraph 16 rpt (2005 environmental projects rpt)2085114
7/8/2005Cindy Caulk / Aerojet General CorpEd Cargile / CA Environmental Protection Agency - Dept of Toxic Substances Control
Charles Berrey / Environmental Protection Agency - Region 9
Alexander MacDonald / CA Regional Water Quality Control Board - Central Valley Region
Ltr: Response to agency comments on 2005-2006 exhibit 4 monitoring plan - transmits revised plan, w/attch2085608
7/21/2005Charles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General CorpLtr: Comments on & provisional approval of final RI/FS work plan for source area OUs2085601
7/21/2005Charles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General CorpLtr: Interim review of landfill site RI/FS workplan2085618
7/22/2005Alexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionJoyce Horizumi / Sacramento County - Environmental Management DeptLtr: Comments on notice of preparation of draft environmental impact rpt for Easton project2085603
7/22/2005Charles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General CorpLtr: Joint agency comments on field sampling plan for validation of Johnson & Ettinger model2085602
7/22/2005Mark Gilbert / Sacramento Regional Transit DistrictCharles Berrey / Environmental Protection Agency - Region 9Ltr: Transmits 8/3/03 MGE Engineering draft rpt on subsurface soils S of Folsom Blvd & 6/05 Geocon Consultants final rpt prepared for W Creek Lane construction project, w/encls2085631
7/25/2005Charles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General CorpLtr: EPA Risk Assessor comments on landfill site RI/FS workplan2085619
7/27/2005Charles Berrey / Environmental Protection Agency - Region 9Mark Gilbert / Sacramento Regional Transit DistrictLtr: Acknowledges receipt of 3 rpts & requests addendum to Geocon Consultants final rpt for W Creek Lane construction project2085628
8/1/2005Alexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General CorpLtr: Joint agency comments on standard operating procedures for site2085606
8/2/2005Charles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General CorpLtr: Provisional approval of 2005-2006 exhibit 4 monitoring plan2085605
8/2/2005Cindy Caulk / Aerojet General CorpAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley Region
Charles Berrey / Environmental Protection Agency - Region 9
Ed Cargile / CA Environmental Protection Agency - Dept of Toxic Substances Control
Memo: Transmits preliminary response to agency comments & replacement pp for 2/05 final perimeter groundwater OU RI/FS - discusses plans for submitting draft risk assessment figures, w/response to comments only2085620
8/3/2005Jim Brake / Geocon Consultants, IncCharles Berrey / Environmental Protection Agency - Region 9Ltr: Results of additional soil sample collection & analysis fr shallow soil investigation for Regional Transit W Creek Lane construction project, w/email TL to C Berrey fr M Gilbert & attchs2085632
8/4/2005Charles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General CorpLtr: Joint agency comments on workplan to determine background metals in surface soils at site2085607
8/11/2005Alexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General CorpLtr: Joint agency comments on draft closure modification plan for Aerojet landfill, waste management units 1, 2, 3 & 42085625
8/18/2005Cindy Caulk / Aerojet General CorpCharles Berrey / Environmental Protection Agency - Region 9
Alexander MacDonald / CA Regional Water Quality Control Board - Central Valley Region
Ed Cargile / CA Environmental Protection Agency - Dept of Toxic Substances Control
Ltr: Response to comments on field sampling plan for validation of Johnson & Ettinger model2085118
9/6/2005David Berry / CA Environmental Protection Agency - Dept of Toxic Substances ControlEd Cargile / CA Environmental Protection Agency - Dept of Toxic Substances ControlMemo: Review of field sampling plan for validation of Johnson & Ettinger model2085617
9/8/2005Charles Berrey / Environmental Protection Agency - Region 9-(Privileged, FOIA ex 5) National Remedy Review Board presentation package (for 10/6/05 board mtg), w/overheads (Privileged document target only)2185767
9/14/2005Charles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General CorpLtr: Joint agency comments on preliminary risk assessment figures for perimeter groundwater OU2085629
9/20/2005CA Regional Water Quality Control Board - Central Valley RegionAerojet General CorpDraft revised cleanup & abatement order for White Rock Rd N Dump2085627
10/4/2005Alexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCharles Berrey / Environmental Protection Agency - Region 9Ltr: Comments on National Remedy Review Board presentation package2085626
10/5/2005Cindy Caulk / Aerojet General CorpCharles Berrey / Environmental Protection Agency - Region 9Ltr: Additional comments on National Remedy Review Board presentation2085624
10/5/2005Alexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionGerald Swanick / Aerojet General CorpTL: Draft revised cleanup & abatement order for White Rock Rd N Dump2085614
10/11/2005Charles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General CorpLtr: Response to Aerojet proposed schedules & SOW for OU5, w/attch2085630
9/20/2006Cindy Caulk / Aerojet General CorpEd Cargile / CA Environmental Protection Agency - Dept of Toxic Substances Control
Charles Berrey / Environmental Protection Agency - Region 9
Alexander MacDonald / CA Regional Water Quality Control Board - Central Valley Region
Ltr: Response to agency comments on material modification project schedules for zones 1, 3 & 4, w/attchs2116569
9/27/2006Alexander MacDonald / CA Regional Water Quality Control Board - Central Valley Region-Overheads (28): Aerojet update2158448
9/27/2006John Coppola / Sacramento County Water Agency-Overheads (9 total, 6 per page): Eastern Sacramento County Replacement Water Supply Project, w/maps2158454
11/15/2006Alexander MacDonald / CA Regional Water Quality Control Board - Central Valley Region-Mtg Handouts - 11/15/06 CAG (community advisory group) meeting, w/marginalia2158449
12/22/2006Charles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General CorpLtr: Comments on perimeter OU, zone 1 proposed hydraulic containment system design2116823
1/16/2007Aerojet General CorpEnvironmental Protection Agency - Region 9
CA Environmental Protection Agency - Dept of Toxic Substances Control
CA Regional Water Quality Control Board - Central Valley Region
Water supply alternatives rpt (final) for Grant Line Rd Properties well (9N/7E-34-E1, Aerojet well 1029), w/TL fr C Caulk to K Mayer, et al 2/15/072154956
1/24/2007Alexander MacDonald / CA Regional Water Quality Control Board - Central Valley Region-Mtg Handouts - 1/24/07 CAG meeting2158450
1/24/2007--Mtg Notes: 1/24/07 CAG meeting, w/marginalia2158451
1/25/2007GeoSyntec Consultants, IncAerojet General CorpCompact Disc: Perimeter groundwater OU vapor intrusion screening assessment & additional sampling workplan, & TLs (Adobe pdf format)2154970
1/25/2007Cindy Caulk / Aerojet General Corp
Craig Fegan / Aerojet General Corp
Chris Fennessy / Aerojet General Corp
Gary Riley / Environmental Protection Agency - Region 9Memo (Draft): Monthly agency technical meeting summary for 3/28/07 mtg, w/marginalia (electronic comments), w/o attchs2154949
1/25/2007GeoSyntec Consultants, IncAerojet General CorpPerimeter groundwater OU vapor intrusion screening assessment & additional sampling workplan, w/TLs2154969
2/2/2007Alexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionKaren Gunderson / Aerojet General CorpLtr: Revised monitoring & reporting program, order # 88-150, Aerojet solid waste disposal sites class 3 landfills, w/attch2180667
2/21/2007Cindy Caulk / Aerojet General CorpKevin Mayer / Environmental Protection Agency - Region 9
Alexander MacDonald / CA Regional Water Quality Control Board - Central Valley Region
Ed Cargile / CA Environmental Protection Agency - Dept of Toxic Substances Control
Ltr: Response to agency comments on zone 1 proposed hydraulic containment system design, w/attch2154955
2/21/2007Cindy Caulk / Aerojet General CorpKevin Mayer / Environmental Protection Agency - Region 9
Alexander MacDonald / CA Regional Water Quality Control Board - Central Valley Region
Ed Cargile / CA Environmental Protection Agency - Dept of Toxic Substances Control
TL: GET A Zone 4 material modifications design submittal - 2 sets of construction documents2154954
2/27/2007Gary Riley / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General CorpLtr: Joint agency review of QAPP & RI/FS QAPP addendum for source area OUs2141580
3/1/2007Aerojet General Corp-Standard operating procedures for site, w/TL to K Mayer, et al fr C Caulk 3/31/072180686
3/19/2007Kevin Mayer / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General CorpLtr: Joint agency approval of 1/27/07 vapor intrusion screening assessment & additional sampling workplan - transmits comments, w/attch2154964
3/27/2007Craig Fegan / Aerojet General CorpKevin Mayer / Environmental Protection Agency - Region 9Ltr: Treatment of NDMA in GET facilities - discusses feasibility of treating NDMA to 1.3 ppt, w/attchs2154948
4/25/2007Larry Bradfish / Environmental Protection Agency - Region 9B Thedinger / Hogan & Hartson (Attorneys)Ltr: Response to questions in 4/10 & 4/17 ltrs re site & proposed development of adjacent "carve-out" properties2180668
5/1/2007Alexander MacDonald / CA Regional Water Quality Control Board - Central Valley Region-Mtg Handout - Aerojet activities, 5/07 CAG meeting2158452
5/15/2007Cindy Caulk / Aerojet General CorpAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley Region
Ed Cargile / CA Environmental Protection Agency - Dept of Toxic Substances Control
Kevin Mayer / Environmental Protection Agency - Region 9
Ltr: 2 proposed Zone 4, GET A material modifications2179168
5/15/2007Cindy Caulk / Aerojet General CorpKevin Mayer / Environmental Protection Agency - Region 9
Alexander MacDonald / CA Regional Water Quality Control Board - Central Valley Region
Ed Cargile / CA Environmental Protection Agency - Dept of Toxic Substances Control
Ltr: Proposal of Zone 3, GET B material modification2179167
5/30/2007Cindy Caulk / Aerojet General CorpAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionLtr: Response to request for water quality data fr groundwater monitoring2180688
6/11/2007Anne Olson / CA Regional Water Quality Control Board - Central Valley RegionMichael Winter / Sacramento County - Dept of Planning & Community DevelopmentLtr: Comments on proposed general plan amendment, rezone, use permit, reclamation plan, grading permit, & encroachment permit (control #02-0636) for Teichert Quarry2179169
6/22/2007Aerojet General Corp-QAPP for site, w/TL to G Riley, et al fr C Caulk & response to comments2180687
6/26/2007Alexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionKaren Gunderson / Aerojet General CorpLtr: Comments on revised landfill postclosure maintenance plan for Aerojet solid waste disposal sites class 3 landfills - plan revision not needed2180666
7/1/2007Alexander MacDonald / CA Regional Water Quality Control Board - Central Valley Region-Mtg Handouts - Aerojet activities, 7/07 CAG meeting2158453
7/9/2007Gerald Swanick / Aerojet General CorpAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionLtr: Request for relaxation of discharge limitation for NDMA under NPDES permit # CA0083861, w/attch2179160
7/25/2007--Mtg Notes: 7/25/07 CAG meeting2180676
7/31/2007Alexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General CorpLtr: Approval of revised standard operating procedures (3/07)2179161
8/20/2007Cindy Caulk / Aerojet General CorpAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley Region
Kevin Mayer / Environmental Protection Agency - Region 9
Ed Cargile / CA Environmental Protection Agency - Dept of Toxic Substances Control
Ltr: Exhibit 4-3 NDMA analytical methods evaluation rpt (sitewide)2180670
8/21/2007Aerojet General Corp - Environmental Remediation Dept-Aerial Photo: Proposed well locations, Natomas Fish Hatchery area, 1 in = 300 ft, color (vapor intrusion)2154958
8/23/2007Cindy Caulk / Aerojet General CorpKevin Mayer / Environmental Protection Agency - Region 9Email: Site for disposal of soils fr 10D ditch2179183
8/30/2007Kerik Kouklis / Aerojet General CorpAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionLtr: Project update & schedule for former White Rock N Dump, w/attch2179171
9/1/2007Alexander MacDonald / CA Regional Water Quality Control Board - Central Valley Region-Mtg Handouts - Aerojet activities, 9/07 CAG meeting, & map, w/marginalia2180677
9/11/2007Cindy Caulk / Aerojet General Corp-Ltr: Notice to Fair Oaks property owners re installation of groundwater extraction well near Sailor Bar Park, w/attch2180669
11/19/2007Cindy Caulk / Aerojet General CorpKevin Mayer / Environmental Protection Agency - Region 9
Ed Cargile / CA Environmental Protection Agency - Dept of Toxic Substances Control
Alexander MacDonald / CA Regional Water Quality Control Board - Central Valley Region
Ltr: Updated material modification project schedules for Zone 1, Zone 3 & Zone 4, w/attchs2179182
12/13/2007Alexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCraig Fegan / Aerojet General CorpTL: Revised NPDES permit waste discharge requirements adopted at 7/31/08 meeting of Regional Board2180665
1/24/2008Cindy Caulk / Aerojet General CorpGary Riley / Environmental Protection Agency - Region 9Memos (2): Monthly agency technical meeting summaries, 9/25/07 & 11/1/07 (sitewide), w/attchs2180675
2/1/2008Alexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General CorpLtr: Review of Perimeter Groundwater OU follow-up vapor intrusion screening assessment2179172
2/12/2008Gary Riley / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General CorpLtr: Conditional approval of QAPP & RI/FS QAPP addendum for source area OUs (sitewide)2180673
2/25/2008Alexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General CorpLtr: Comments on Zone 3, GET B material modification design submittal, Perimeter Groundwater OU2179173
3/7/2008Cindy Caulk / Aerojet General CorpEd Cargile / CA Environmental Protection Agency - Dept of Toxic Substances Control
Kevin Mayer / Environmental Protection Agency - Region 9
Alexander MacDonald / CA Regional Water Quality Control Board - Central Valley Region
Ltrs (17): Results of monthly sample fr well 9N/7E-7-F1 (Fair Oaks Water District Chicago well, Aerojet well 1049), for 07/20/06, 8/11/06, 11/9/06-11/9/07 & 1/11/08-2/8/08, w/attchs2154951
3/10/2008Cindy Caulk / Aerojet General CorpKevin Mayer / Environmental Protection Agency - Region 9
Ed Cargile / CA Environmental Protection Agency - Dept of Toxic Substances Control
Alexander MacDonald / CA Regional Water Quality Control Board - Central Valley Region
Ltr: Response to comments on perimeter groundwater OU follow-up vapor intrusion screening assessment2154961
3/11/2008Alexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionChris Fennessy / Aerojet General CorpLtr: Results of samples collected fr ARGET, GET E/F, Get J & GET L1 on 2/12-2/13/082179188
3/13/2008Kevin Mayer / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General CorpLtr: Approval of proposal for more conservative soil physical property inputs for vapor intrusion model for Perimeter Groundwater OU (sitewide)2180671
4/1/2008Aerojet General Corp-Draft 2008-2009 groundwater monitoring plan, w/TL to K Mayer, et al fr C Caulk2180662
4/2/2008Kevin Mayer / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General CorpLtr: Comments on draft groundwater flow model update rpt2179185
4/22/2008Cindy Caulk / Aerojet General CorpKevin Mayer / Environmental Protection Agency - Region 9
Ed Cargile / CA Environmental Protection Agency - Dept of Toxic Substances Control
Alexander MacDonald / CA Regional Water Quality Control Board - Central Valley Region
Ltr: Initial detection of NDMA at Teichert Industrial Supply Well (Aerojet Well 1943)2154946
4/22/2008Cindy Caulk / Aerojet General CorpAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley Region
Ed Cargile / CA Environmental Protection Agency - Dept of Toxic Substances Control
Kevin Mayer / Environmental Protection Agency - Region 9
Ltr: Results of rescreening & proposal to complete additional soil vapor sampling & Perimeter Groundwater OU RI/FS (vapor intrusion), w/attchs2154962
4/23/2008GeoSyntec Consultants, IncAerojet General CorpCompact Disc: Updated perimeter groundwater OU vapor intrusion screening assessment & TLs (Adobe pdf format)2154968
4/23/2008GeoSyntec Consultants, IncAerojet General CorpUpdated perimeter groundwater OU vapor intrusion screening assessment, w/TLs2154967
5/8/2008Kevin Mayer / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General CorpLtr: Approval for proposed verification of NDMA results for well 19432154947
6/4/2008Cindy Caulk / Aerojet General CorpKevin Mayer / Environmental Protection Agency - Region 9
Alexander MacDonald / CA Regional Water Quality Control Board - Central Valley Region
Ed Cargile / CA Environmental Protection Agency - Dept of Toxic Substances Control
Ltr: Transmits standard operating procedures revised pages for review, w/attchs2179164
6/9/2008Craig Fegan / Aerojet General CorpResident/Business Owner / City of Gold RiverLtr: Advises Gold River residents & business owners of proposed new monitor well, w/attch2179175
6/17/2008Craig Fegan / Aerojet General Corp-Ltr: Advises property & business owners in Gold River of proposed new monitor well, w/attch2179174
7/18/2008Alexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General CorpLtr: Comments on stormwater pollution prevention section of final closure modification plan for landfill waste management units 1, 2, 3 & 42179163
8/8/2008Alexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionKaren Gunderson / Aerojet General CorpLtr: Transmits revised NPDES permit - waste discharge requirements adopted at 7/31/08 meeting of Regional Board, w/o encl2179165
9/12/2008Tom Gray / Fair Oaks Water District
Cindy Caulk / Aerojet General Corp
-Ltr: Notice to Fair Oaks property owners re installation of groundwater monitor well & extraction well, w/attchs2179181
9/29/2008Kevin Mayer / Environmental Protection Agency - Region 9Lynn Suer / Environmental Protection Agency - Region 9Memo: Site-specific data for perchlorate exposure to humans - examining preliminary remediation goal, w/attch1117501
12/19/2008Alexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionChris Fennessy / Aerojet General CorpLtr: Tentative resolution for revising NPDES permit, GET systems, ARGET, GET E/F, GET H, interim GET H, GET J, GET K, Interim GET K, GET L/L1, Chettenham Well & Sailor Bar Park pond, w/encl2179166
1/21/2009Cindy Caulk / Aerojet General CorpEd Cargile / CA Environmental Protection Agency - Dept of Toxic Substances Control
Kevin Mayer / Environmental Protection Agency - Region 9
Alexander MacDonald / CA Regional Water Quality Control Board - Central Valley Region
Ltrs (3): Partial consent decree exhibit 2 quarterly progress rpts for 4/08-12/08, w/attchs2185564
2/13/2009Cindy Caulk / Aerojet General CorpKevin Mayer / Environmental Protection Agency - Region 9
Ed Cargile / CA Environmental Protection Agency - Dept of Toxic Substances Control
Alexander MacDonald / CA Regional Water Quality Control Board - Central Valley Region
Ltr: Supplemental data & contingency plan for proposal to modify Zone 1 material modification hydraulic containment system design, w/attchs2179177
3/11/2009Kevin Mayer / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General CorpLtr: Joint agency approval of 30 day extension, to submit groundwater monitoring plan on 5/1/092179178
6/25/2009Engineering Management Support, Inc
Central Valley Environmental, Inc
Aerojet General Corp - Environmental Remediation Dept
Aerojet General CorpCompact Disc: Perimeter groundwater OU RI/FS rpt, part 1 (Adobe pdf & MS Access formatted files)2185763
6/25/2009E R M-West, IncAerojet General CorpCompact Disc: Perimeter groundwater OU RI/FS, part 2 of 2, attchs A & B only (zip files of MS Excel formatted files)2185765
7/6/2009E R M-West, IncAerojet General CorpCompact Disc: Perimeter groundwater OU RI/FS - RI/FS rpt for PGOU lands, part 2 (6/25/09, revised 7/6/09) (Adobe pdf, MS Excel & other formats)2185764
7/6/2009Charles Berrey / Environmental Protection Agency - Region 9-List of US EPA guidance documents consulted during development & selection of response action for site2185766
-Kennedy/Jenks Consultants-Overheads (12): Carmichael Water District / Aerojet NDMA groundwater extraction & treatment2158455

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