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Pacific Southwest, Region 9: Superfund

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

Aerojet General Corp.

Superfund Site

Western Groundwater OU AR

Administrative Record Index

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

The documents contained in this administrative record file were used by the U.S. Environmental Protection Agency in identifying appropriate remedial activities for use at the Aerojet General Corp. Superfund site, Western Groundwater Operable Unit, in Rancho Cordova, California. The administrative record supports the Record of Decision (ROD) dated July 20, 2001, AR 457.
The administrative record contains documents in two media. Documents AR 1 - AR 330 and 332 - 458 are on microfilm. AR 331, which is a compact disc (CD-ROM) containing groundwater data, can be found in the AR cumulative index binder. The CD-ROM uses GIS/Key, and the files are in DBF format. The files can be accessed by any database system that can handle 1 million data points

The administrative record has been added to as documents have become available. Each compilation is arranged in ascending chronological order, with undated documents at the beginning of each sequence. Each document has been assigned a unique identification number.

For ease of use, the indexes have been combined to produce a cumulative index that is presented in two formats. The first format lists the documents in AR number order, which reflects the arrangement of the documents in the file; the second format lists the documents in ascending chronological order.

The Proposed Plan for the Western Groundwater Operable Unit is AR 333. 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 324 in this administrative record file. Copies of the guidance documents are contained in the Compendium of CERCLA Response Selection Guidance Documents located in the Region 9 Superfund Records Center.


August 24, 2001

List of Abbreviations and Acronyms Used in Administrative Record Index

AbbreviationMaeaning
appAppendix
ARGETAmerican River groundwater extraction & treatment (facility)
attchAttachment
BRABaseline Risk Assessment
CAState of California
CAOCleanup & Abatement Order
CFRCode of Federal Regulations
CoCompany
CorpCorporation
DBFDatabase format
DeptDepartment
DivDivision
DOHSCalifornia Department of Health Services
DTSCCalifornia Department of Toxic Substances Control
EE/CAEngineering evaluation/cost analysis
enclEnclosure
EPAEnvironmental Protection Agency
et alAnd others
exExemption
ExhExhibit
FOIAFreedom of Information Act
frFrom
FSFeasibility Study
GAC/FBGranular activated carbon/fluidized bed (treatment process)
GETGroundwater Extraction & Treatment (facility)
gwGroundwater
inInches
IncIncorporated
LOAELLowest observed adverse effect level
ltrLetter
memoMemorandum
mtgMeeting
NNorth
NCEANational Center for Environmental Assessment (EPA)
NDMAN-Nitrosodimethylamine
NERLNational Exposure Research Laboratory (EPA)
NOAELNo Observed Adverse Effect Level
NPDESNational Pollutant Discharge Elimination System
NRRBNational Remedy Review Board (EPA)
O&MOperation & maintenance
OUOperable Unit
OUFSOperable Unit Feasibility Study
pPage
ppPages
PWSARPreliminary water supply alternatives report
QAQuality Assurance
QAPPQuality Assurance Project Plan
RARemedial Action
reRegarding
revRevision or revised
RfDReference dose
RIRemedial Investigation
RI/FSRemedial Investigation/Feasibilty Study
RODRecord of Decision
rptReport
RWQCB-CVCalifornia Regional Water Quality Control Board-Central Valley
SESoutheast
SERIXSelective Electrochemically Regenerated Ion eXtraction (TM)
SIRSSelective Ion Removal System (TM)
TCETrichloroethylene
TLTransmittal Letter
USUnited States
USAUnited States of America
UVUltraviolet
vVolume
WWest
w/With (indicates presence of attachments or enclosures)
w/oWithout (indicates absence of part of document)

Administrative Record Index

Doc Date
Subject
Author / Author Affiliate
Addressee / Addressee Affiliate
AR #
Roll #
Frame #
Doc ID
1983/09/08Excerpt: 40 CFR, part 300 - amendment to National Oil & Hazardous Substance Contingency Plan, National Priorities List (v48, #175)Federal Register (Periodical)-0001100011615-02046
1989/06/23Partial consent decree as modified following public comment, USA et al v Aerojet-General Corp et al, dockets #CIVS-86-0063-EJG & -0064-EJGUS District Court - Eastern District of CaliforniaAerojet General Corp0002100111615-00680
1992/09/23Ltr: Transmits analytical data sheets for all tentatively identified compounds (TICs) detected to date, w/enclCindy Caulk / Aerojet General CorpKathryn Lawrence / Environmental Protection Agency - Region 90003101901615-01472
1992/09/23Ltr: Tentatively identified compounds (TICs) in groundwater at GET facilities, w/TL to K Lawrence fr R YeadonRobert Yeadon / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp0004102251615-91935
1992/09/24Ltr: Tentatively identified compounds (TICs) in groundwater at GET facilitiesRobert Yeadon / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp0005102281615-91936
1992/10/02Ltr: Sampling & analyzing data for specific wells re tentatively identified compounds (TICs)Cindy Caulk / Aerojet General CorpKathryn Lawrence / Environmental Protection Agency - Region 90006102311615-91938
1992/12/02Memo: Transmits & discusses risk assessment issue paper for provisional non-cancer & cancer toxicity values for potassium perchlorate, w/attchJoan Dollarhide / Environmental Protection Agency - Office of Research & DevelopmentDan Stralka / Environmental Protection Agency - Region 90007102341615-01621
1993/03/00Community relations plan w/appendices A & BP R C Environmental Management, IncEnvironmental Protection Agency - Office of Waste Programs Enforcement0008102581615-01780
1995/03/14Ltr: Proposed modification to consent decreeMarie Rongone / Environmental Protection Agency - Region 9Lawrence Hobel / Heller, Ehrman, White & McAuliffe (Attorneys)0009102911615-91699
1996/03/14Ltr: Regional Board comments on workplan for onsite demonstration of GAC/fluidized bed process for treatment of perchlorate impacted groundwaterAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp0010102941615-92219
1996/03/14Ltr: Confirms transmittal of 3 rpts re perchlorate - NCEA provisional RfD, literature review of NOAEL & LOAEL values, & cancer toxicity valuesCindy Caulk / Aerojet General CorpJo Ann Cola / Environmental Protection Agency - Region 90011102971615-92220
1996/03/27Ltr: Approves workplan for onsite demo of GAC/fluidized bed process for treatment of perchlorate-impacted groundwaterDuncan Austin / CA Environmental Protection Agency - Dept of Toxic Substances ControlCindy Caulk / Aerojet General Corp0012102991615-91991
1996/04/00GET E & F facility effectiveness evaluation rptHydro-Search, IncAerojet General Corp0013103021615-01344
1996/04/30Ltr: Agencies must approve Aerojet request to discharge water fr perchlorate treatment system to ground at GET facilityAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp0014109001615-92000
1996/05/15Ltr: Regional Board comments on Aerojet proposal of RA for onsite groundwater in western half of siteDuncan Austin / CA Environmental Protection Agency - Dept of Toxic Substances ControlAnne Marie Collins / Aerojet General Corp - Environmental Operations0015109021615-92006
1996/06/21Ltr: Comments on GET E & F facility effectiveness evaluation rptAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp0016109061615-91851
1996/07/00Health consultation (area W of Aerojet facility)CA Dept of Health Services-0017109111615-01346
1996/07/08Ltr: Comments on groundwater issues in western part of site, urges establishing gw remediation system & lists related mtg items to discussAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp0018109281615-92013
1996/08/00Response to comments on GET E & F effectiveness evaluation rpt, w/TL fr C Caulk to J Cola et al 8/23/96Aerojet General CorpCA Regional Water Quality Control Board - Central Valley Region0019109311615-01347
1996/09/26Memo: Perchlorate levels in water based on reference dose (RfD) derived by National Ctr for Environmental Assessment (NCEA)Karen Randles / CA Environmental Protection Agency - Office of Environmental Health Hazard AssessmentDuncan Austin / CA Environmental Protection Agency - Dept of Toxic Substances Control0020109441615-92206
1997/05/001997-98 Groundwater monitoring planAerojet General Corp-0021109481615-01688
1997/05/09Ltr: Comments on Engineering Evaluation & Cost Analysis (EE/CA) for treatment of perchlorate impacted groundwater, GET F facility, submitted 4/24/97Charles Berrey / Environmental Protection Agency - Region 9Alexander MacDonald / CA Regional Water Quality Control Board - Central Valley Region0022110221615-92144
1997/05/15Ltr: Transmits & discusses text & tables for 1997-98 groundwater monitor plan, w/o enclsCindy Caulk / Aerojet General CorpCharles Berrey / Environmental Protection Agency - Region 90023110251615-92367
1997/07/00Engineering evaluation & cost analysis (EE/CA) for treatment of perchlorate impacted gw - GET F facility, w/TLs & marginaliaAerojet General Corp-0024110271615-02027
1997/07/00Rev standard operating procedures for water quality sampling & for RI/FS field investigation, w/TL to C Berrey, et al fr C Caulk 7/31/97Aerojet General Corp-0025114461615-02028
1997/07/17Ltr: EPA approval of Engineering Evaluation & Cost Analysis (EE/CA) for treatment of perchlorate impacted groundwater, GET F facility, & commentsCharles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General Corp0026115291615-92135
1997/07/24Ltr: Comments on revised GET F facility rpt submitted 7/16/97Charles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General Corp0027115321615-92134
1997/07/31Ltr: Confirms transmittal of figures 1-10 for 1997-98 groundwater monitoring plan, w/o enclCindy Caulk / Aerojet General CorpCharles Berrey / Environmental Protection Agency - Region 90028115351615-92366
1997/08/07Ltr: Comments on 1997-98 site groundwater monitoring plan submitted 5/15 & 7/31/97Charles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General Corp0029115371615-92131
1997/08/15Ltr: Comments on 1997-98 groundwater monitoring planAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp0030115411615-92368
1997/08/22Ltr: Comments on revised GET E facility rptAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp0031115451615-92081
1997/09/02Ltr: Comments on 60 percent design specifications & drawings for N GET F facility, perchlorate impacted groundwater treatment systemCharles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General Corp0032115471615-92130
1997/09/10Ltr: Transmits description of International Toxicity Estimates for Risk (ITER) peer review process & discusses peer review of revised perchlorate RfDMichael Dourson / Toxicology Excellence for Risk AssessmentCharles Berrey / Environmental Protection Agency - Region 90033115491615-92167
1997/09/12Ltr: Comments on Quality Assurance Manual (QAM) & Laboratory Standard Operating Procedures (SOPs) submitted 7/31/97, w/attchCharles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General Corp0034115541615-01591
1997/09/22Ltr: Comments on technical memo - preliminary evaluation of perchlorate, GETs E & F, & acceptance of proposed groundwater monitoring well locationsAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp0035115661615-92120
1997/09/24Ltr: Conditionally approves Quality Assurance Project Plan (QAPP) submitted 6/30/97 & transmits EPA Quality Assurance Program comments, w/attchCharles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General Corp0036115681615-01597
1997/09/24Ltr: EPA approval of revised standard operating procedures manual for water quality sampling & RI/FS field investigation submitted 7/31/97Charles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General Corp0037115781615-92169
1997/10/00Technical memo: Evaluation of perchlorate, southeastern zone 2, w/TL to A MacDonald fr C Caulk 10/30/97Aerojet General Corp-0038115801615-01566
1997/10/00Technical specifications for perchlorate treatment plant, SP-1295, w/marginaliaAerojet General Corp-0039116041615-01569
1997/10/06Ltr: Comments on draft health consultations on perchlorate in various water supply systems in vicinity of Rancho CordovaAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionJane Riggan / CA Dept of Health Services - Environmental Health Investigations Branch0040120231615-92102
1997/10/09Ltr: Correction to comments on draft health consultations on perchlorate in various water supply systems in vicinity of Rancho CordovaAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionJane Riggan / CA Dept of Health Services - Environmental Health Investigations Branch0041120271615-92103
1997/10/17Ltr: Discusses perchlorate studies & transmits responsiveness summaries for protocols (drinking water toxicity & neurobehavioral studies), w/enclsMichael Dourson / Toxicology Excellence for Risk AssessmentJoe Brown / CA Environmental Protection Agency - Office of Environmental Health Hazard Assessment0042120291615-01588
1997/10/20Ltr: EPA approval of technical memo - preliminary evaluation of perchlorate, GETs E & F, submitted 9/17/97Charles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General Corp0043120431615-92121
1997/10/20Ltr: EPA approval of standard operating procedure PAL-EA-0034 revision 3 (7/31/97) for perchlorate analysis by ion chromatographyCharles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General Corp0044120451615-92122
1997/10/20Ltr: Approval of modification to Exhibit 6 of partial consent decree, per 9/29/97 Aerojet ltrKatherine Moore / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General Corp0045120471615-92123
1997/10/20Ltr: Approval of modification to Exhibit 6 of partial consent decree, per 9/29/97 Aerojet ltr, w/marginalia (concurrence copy)Katherine Moore / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General Corp0046120491615-92286
1997/10/21Ltr: Comments on draft health consultations re perchlorate contaminationDuncan Austin / CA Environmental Protection Agency - Dept of Toxic Substances ControlJane Riggan / CA Dept of Health Services - Environmental Health Investigations Branch0047120511615-92104
1997/10/22Ltr: Comments on draft health consultations re perchlorate exposure water purveyorsCharles Berrey / Environmental Protection Agency - Region 9Jane Riggan / CA Dept of Health Services - Environmental Health Investigations Branch0048120541615-92105
1997/10/23Ltr: Comments on 9/29/97 draft health consultationsSuzanne Phinney / Aerojet General CorpJane Riggan / CA Dept of Health Services - Environmental Health Investigations Branch0049120571615-01565
1997/10/28Ltr: EPA comments on perchlorate treatment 100 percent design submitted 10/23/97Charles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General Corp0050120691615-92181
1997/10/29Ltr: Transmits response to Regional Board comments on 1997-98 gw monitoring plan, proposed format for 1998-99 plan & GET B perchlorate plan, w/enclsCindy Caulk / Aerojet General CorpCharles Berrey / Environmental Protection Agency - Region 90051120721615-01561
1997/10/29Response to comments on 90% design document for perchlorate treatment plant at GET F, w/TL to A MacDonald fr C Caulk 10/31/97 & marginalia 10/13/2000Aerojet General CorpCA Regional Water Quality Control Board - Central Valley Region0052120941615-01568
1997/10/31Ltr: Requests revision to schedule submitted pursuant to cleanup & abatement order #96-259 re operation & maintenance planCindy Caulk / Aerojet General CorpAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley Region0053121021615-92087
1997/11/07Ltr: Intent to initiate reduction of partial consent decree exhibit 6 monitoringCindy Caulk / Aerojet General CorpCharles Berrey / Environmental Protection Agency - Region 90054121041615-92089
1997/11/07Ltr: Regional Board comments on perchlorate treatment plant, GET F 100 percent designAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp0055121061615-92180
1997/11/10Ltr: Transmits response to agency comments on GET E & F facility rpts, & revised GET A, E & F facility rpts, w/encls & agency comment ltrsCindy Caulk / Aerojet General CorpCharles Berrey / Environmental Protection Agency - Region 90056121091615-01567
1997/11/10Ltr: Approval as submitted of perchlorate treatment plant, GET F 100 percent designAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp0057122241615-92179
1997/11/14Ltr: Requests Aerojet evaluate methods to reduce detection level for analysis of N-nitrosodimethylamine (NDMA)Alexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp0058122261615-92092
1997/11/18TL: Results of sampling water well on property, SE corner of Trade Center Dr & Kilgore Rd, w/marginaliaAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp0059122281615-92094
1997/11/19Ltr: Updates to perchlorate treatment evaluation schedule, submitted pursuant to cleanup & abatement order #96-259, w/attchCindy Caulk / Aerojet General CorpAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley Region0060122301615-92095
1997/12/01Ltr: Transmits 7/97 standard operating procedures (revised) & 8/22/97 DTSC response to comments on review of procedures, w/enclsCindy Caulk / Aerojet General CorpCharles Berrey / Environmental Protection Agency - Region 90061122351615-01558
1997/12/03Ltr: Comments on 10/29/97 Aerojet response to agency comments on 1997-98 gw monitoring plan & proposed 1998-99 formatCharles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General Corp0062123201615-92076
1997/12/03Ltr: Approves response to agency comments on GET A, E & F facility rpt revisionsCharles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General Corp0063123221615-92084
1997/12/10Ltr: Regional Board acceptance of revised facilities rpts for GETs A, E & F, & response to commentsAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp0064123241615-92280
1997/12/22Ltr: Regional Board comments on technical memo - evaluation of perchlorate, SE zone 2Alexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp0065123261615-92277
1998/01/00Revised groundwater monitoring plan for American River Study Area, per cleanup & abatement order 96-230, w/attchs & TL fr C Caulk to A MacDonaldAerojet General CorpCA Regional Water Quality Control Board - Central Valley Region0066123291615-92469
1998/01/02Memo: Proposed modifications to exhibit 4 of partial consent decree to include perchlorateTom Pinkos / CA Environmental Protection AgencyJames Tjosvold / CA Environmental Protection Agency - Dept of Toxic Substances Control0067123361615-92274
1998/01/05Ltr: Transmits updated perchlorate treatment evaluation schedule & lists changes to schedule, w/attchCindy Caulk / Aerojet General CorpAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley Region0068123391615-92496
1998/01/06Ltr: Dispute under paragraph 20 of partial consent decreeLawrence Hobel / Heller, Ehrman, White & McAuliffe (Attorneys)Thelma Estrada / Environmental Protection Agency - Region 90069123441615-92272
1998/01/08Ltr: Responds to Regional Board request to evaluate analytical methods to lower NDMA detection level, w/attchCindy Caulk / Aerojet General CorpCharles Berrey / Environmental Protection Agency - Region 90070123471615-92495
1998/01/14Ltr: Requires sampling of municipal & private water supply wells for perchlorate, w/attchDennis Westcot / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp0071123501615-92492
1998/01/23Ltr: Discusses proposed perchlorate modification to exhibit 4 of partial consent decreeJose Uranga / Aerojet General CorpPhilip Wyels / CA Water Resources Control Board0072123531615-92489
1998/01/30Ltr: Request to sample GET E & F effluent & water supply wells for NDMAAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp0073123591615-92487
1998/02/02Ltr: 1/14/98 Regional Board ltr re monitoring municipal water supply wells for perchlorate - dispute re paragraph 20 of partial consent decreeJose Uranga / Aerojet General CorpDennis Westcott / CA Regional Water Quality Control Board - Central Valley Region0074123611615-92266
1998/02/02Ltr: Approves revised schedule for compliance with cleanup & abatement order 96-259 & lists additions to scheduleThomas Pinkos / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp0075123641615-92482
1998/02/02Ltr: Conditional approval of 11/24/97 quality assurance project plan (QAPP)Charles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General Corp0076123661615-92486
1998/02/06Ltr: Discusses request to report trace dataSuzanne Phinney / Aerojet General CorpAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley Region0077123691615-92477
1998/02/13Ltr: Responds to 1/30/98 ltr requesting sampling for NDMA in water supply wells & GET E & F facility effluentCindy Caulk / Aerojet General CorpAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley Region0078123721615-92466
1998/02/13Ltr: Discusses response to Regional Board request for monitoring off-site water supply wells for perchlorateDennis Westcot / CA Regional Water Quality Control Board - Central Valley RegionJose Uranga / Aerojet General Corp0079123741615-92467
1998/03/01Quality Assurance Project Plan (QAPP), w/responses to EPA commentsAerojet General CorpEnvironmental Protection Agency - Region 90080123771615-01647
1998/03/05Ltr: Sampling & analyses for NDMA in water supply wells & GET E & F effluent, per 1/30/98 ltrCindy Caulk / Aerojet General CorpAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley Region0081124571615-92463
1998/03/06Ltr: Discusses sand delivery - transmits bills of material & engineering drawings for DynaSand filter, w/attchsPaolo Tatasciore / Parkson CorpBrad Lyons / Earth Tech, Inc0082124601615-01684
1998/03/11Ltrs: Transmit updated copy of database & database tape of all new validated data entered 11/15/97 to 3/11/98, per consent decree, w/o tapes, w/copiesCindy Caulk / Aerojet General CorpCharles Berrey / Environmental Protection Agency - Region 90083124921615-01644
1998/03/18Health consultation - perchlorate contamination in Citizens Utilities Suburban & Security Park water service areas, w/app & TL to C Berrey fr W NelsonCA Dept of Health Services-0084200011615-01685
1998/03/18Ltr: Approves revised Quality Assurance Project Plan (QAPP) & documents 3/16/98 discussion re QAPP, w/enclCharles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General Corp0085200421615-92459
1998/03/19Ltr: Discusses reporting trace values of NDMAAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp0086200451615-92457
1998/03/19Ltr: Requires monitoring of municipal water supply wells for NDMA, w/attchThomas Pinkos / CA Regional Water Quality Control Board - Central Valley RegionSuzanne Phinney / Aerojet General Corp0087200471615-92458
1998/03/24Ltr: Monitoring municipal water supply wells for NDMA, as discussed in 3/19/98 ltrGerry Swanick / Aerojet General CorpThomas Pinkos / CA Regional Water Quality Control Board - Central Valley Region0088200511615-92454
1998/03/26Oversize drawings (10): GET F perchlorate treatment plant, 24 X 18 in, scale variesEnvirogen, IncAerojet General Corp0089200551615-01679
1998/03/27Ltr: Requests draft workplan to determine extent of NDMA in groundwater on western side of siteAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp0090200671615-92445
1998/04/03Ltr: Transmits sample results collected in western area of site & water supply wells off-site, w/attchAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp0091200691615-92504
1998/04/07Ltr: Results of sampling Arden Cordova water service well #19 for perchlorate on 3/13/98Alexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp0092200731615-92447
1998/04/10Ltr: Perchlorate sampling results for Arden-Cordova Water Service wellsAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp0093200751615-92347
1998/04/13TL: GET F perchlorate treatment plant shop drawingsCindy Caulk / Aerojet General CorpAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley Region0094200771615-92370
1998/04/16Ltr: Transmits & discusses workplan for investigating presence of NDMA in groundwater, Rancho Cordova & western portion of site, w/enclCindy Caulk / Aerojet General CorpCharles Berrey / Environmental Protection Agency - Region 90095200791615-01672
1998/04/17Mtg agenda: CA Regional Water Quality Control Board - Central Valley Region, including consideration of NPDES permit for Aerojet, w/attchCA Regional Water Quality Control Board - Central Valley Region-0096200941615-01673
1998/04/20Ltr: Comments on workplan for investigating presence of NDMA in groundwater in Rancho Cordova & western portion of siteAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp0097201281615-92352
1998/04/21Health consultation - perchlorate contamination in Arden Cordova Water Service Area, w/attchs & TLs fr W Nelson 7/22/98CA Dept of Health Services-0098201311615-01669
1998/04/21Ltr: Comments on workplan for investigating presence of NDMA in groundwater in Rancho Cordova & western portion of siteCharles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General Corp0099201911615-92353
1998/04/22Ltr: Comments on preliminary water supply alternatives rpt for Arden Cordova Water Service well #19 (Aerojet well #1860)Charles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General Corp0100201931615-92354
1998/04/22Ltr: No additional comments on GET F perchlorate treatment plant shop drawingsCharles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General Corp0101201961615-92371
1998/04/27Ltr: Comments on 1998-99 groundwater monitoring plan for zones 3 & 4, w/marginaliaCharles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General Corp0102201981615-92308
1998/04/30Ltr: Raises objections to plans for contracting outside entity to conduct additional perchlorate assessments, w/ltr 1/8/98 to J Riggan fr S PhinneySuzanne Phinney / Aerojet General CorpDavid Spath / CA Dept of Health Services - Div of Drinking Water & Environmental Management0103202011615-92999
1998/05/001998-99 Groundwater monitoring plan (revised)Aerojet General Corp-0104202061615-01655
1998/05/01Ltr: Discusses NDMA sampling results for public water supply wells, w/NDMA fact sheetGerald Swanick / Aerojet General CorpPaul Schubert / Southern California Water Co0105203511615-01674
1998/05/01Ltr: Requests due date extension for 1998-99 groundwater monitoring plan for zones 1 & 2Cindy Caulk / Aerojet General CorpCharles Berrey / Environmental Protection Agency - Region 90106203601615-92383
1998/05/01Ltr: Requests due date extension for GET F perchlorate treatment facility operation & maintenance (O&M) planCindy Caulk / Aerojet General CorpAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley Region0107203621615-92384
1998/05/01Ltr: Response to request for results of perchlorate toxicological studiesCindy Caulk / Aerojet General CorpAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley Region0108203641615-92386
1998/05/04Ltr: Perchlorate analytical results for samples collected 4/14/98 fr Arden-Cordova Water Service wellsAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp0109203661615-92387
1998/05/04Ltr: Additional comment on list of wells to be sampled per workplan for investigating presence of NDMA in groundwaterAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp0110203681615-92388
1998/05/04Ltr: No comments on technical memo - rpt of monitor well installations & gw sampling for off-site perchlorate investigation, GETs E & FAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp0111203701615-92390
1998/05/08Ltr: Discusses NDMA investigation & transmits workplan for investigating presence of NDMA in gw in Rancho Cordova & western portion of site, w/enclCindy Caulk / Aerojet General CorpCharles Berrey / Environmental Protection Agency - Region 90112203721615-01686
1998/05/08Ltr: No comments on GET F perchlorate treatment plant shop drawingsAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp0113203891615-92391
1998/05/08Ltr: NDMA analytical results for samples collected 4/14/98 fr Arden-Cordova Water Service wellsAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp0114203911615-92392
1998/05/13Ltr: Comments on final workplan for investigation of NDMA in groundwater, Rancho Cordova & western portion of siteCharles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General Corp0115203931615-92358
1998/05/13Ltr: Comments on Aerojet NDMA fact sheetCharles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General Corp0116203951615-92394
1998/05/13Ltr: Discusses ultra low level NDMA method, w/attch & TL fr G Swanick to C BerreyGerald Swanick / Aerojet General CorpCharles Berrey / Environmental Protection Agency - Region 90117203981615-92395
1998/05/13Ltr: Approves due date extension for 1998-99 groundwater monitoring plan, zones 1 & 2Charles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General Corp0118204021615-92396
1998/05/15Ltr: Comments on 1998-99 groundwater monitoring plan for zones 3 & 4Alexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp0119204041615-92309
1998/06/01Ltr: Transmits sections 4 - 5 & revised table of contents for 1998-99 groundwater monitoring plan, w/o encls, w/instruction sheetCindy Caulk / Aerojet General CorpCharles Berrey / Environmental Protection Agency - Region 90120204071615-92310
1998/06/05Health consultation - perchlorate contamination in Fair Oaks Water DistrictCA Dept of Health Services-0121204101615-01794
1998/06/18Health consultation - perchlorate contamination in Sunrise District of Sacramento County Water ServiceCA Dept of Health Services-0122204311615-01795
1998/06/22Ltr: Transmits & discusses updated perchlorate groundwater treatment & evaluation schedule, per cleanup & abatement order #96-259, w/enclCindy Caulk / Aerojet General CorpAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley Region0123204781615-92296
1998/06/23Ltr: Comments on NDMA standard operating procedure (SOP) PAL-EA-0036, revision 0Charles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General Corp0124204831615-92332
1998/06/25Ltr: Transmits & discusses perchlorate-impacted gw treatment plant (GET F) evaluation of potential process modifications, w/attchCindy Caulk / Aerojet General CorpAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley Region0125204861615-01645
1998/07/01Memo: Response to comments on NDMA method PAL-EA-0036, w/attchs 1-3 & TL fr C Caulk to C Berrey, 7/6/98Karin Harris / Aerojet General CorpG Swanick / Aerojet General Corp0126204941615-01693
1998/07/03Ltr: Comments on perchlorate-impacted groundwater treatment plant evaluation of potential process modifications (for GET F plant)Alexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp0127205161615-92293
1998/07/03Ltr: Approves proposed time schedule modifications for perchlorate treatment system, per cleanup & abatement order #96-259Gary Carlton / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp0128205181615-92295
1998/07/03Ltr: Comments on preliminary draft, operations & maintenance (O&M) manual for perchlorate treatment plant, bldgs 16-007, 16-008 & 16-009Alexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp0129205201615-92336
1998/07/09Ltr: Comments on zones 1 & 2 1998-99 groundwater monitoring plan submitted 6/1/98Alexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp0130205231615-92298
1998/07/15Ltr: Comments on perchlorate-impacted groundwater treatment plant evaluation of potential process modifications (for GET F plant)Charles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General Corp0131205271615-92292
1998/07/15Ltr: No comment on proposed time schedule modifications for perchlorate treatment system, per cleanup & abatement order #96-259Charles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General Corp0132205291615-92294
1998/07/17Ltr: Comments on zones 1 & 2 1998-99 groundwater monitoring plan submitted 6/1/98Charles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General Corp0133205311615-92297
1998/07/17Ltr: Comments on perchlorate treatment plant operation & maintenance (O&M) manual for bldgs 16-007, 16-008 & 16-009, submitted 6/13/98Charles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General Corp0134205331615-92299
1998/07/296/98 partial consent decree stipulation & order re exhibit 6 NDMA modifications, w/declarations & certificate of serviceEdward Garcia / US District Court - Eastern District of California-0135205361615-01874
1998/07/30Ltr: Agencies continue to support partial consent decree stipulations & ordersDaniel Lungren / CA Dept of Justice - Office of the Attorney GeneralGlenn Holley / Bolling, Walter & Gawthrop0136205531615-92311
1998/07/30Ltr: Comment period closed for 6/98 partial consent decree stipulations & orders & all parties encourage signature of ordersDaniel Lungren / CA Dept of Justice - Office of the Attorney GeneralEdward Garcia / US District Court - Eastern District of California0137205561615-92312
1998/07/31Revised preliminary & final water supply alternatives rpt for Arden Cordova Water Service Alicante Way well #1 (Aerojet well #1011), w/TLH S I GeoTrans, Inc-0138205591615-01670
1998/07/31Ltr: Conditionally approves NDMA standard operating procedure (SOP)Charles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General Corp0139206771615-92398
1998/08/05Ltr: Approves preliminary & final water supply alternatives rpt for Arden Cordova Water Service Alicante Way well #1Charles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General Corp0140206791615-92400
1998/08/07Notice of entry of 6/98 partial consent decree stipulations & orders, w/exhibits A-D & TL fr L Hobel to D BarnesUS District Court - Eastern District of California-0141206811615-01657
1998/08/21Ltr: Transmits & discusses revised NDMA sampling results for municipal water supply wells (7/98) w/encl & TL fr C Caulk to A MacDonaldCindy Caulk / Aerojet General CorpAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley Region0142207411615-92318
1998/08/26Ltr: No further comments on revised preliminary & final water supply alternatives rpt for Alicante well (Aerojet well 1011)Alexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp0143207471615-92319
1998/08/28Ltr: Standard operating procedure PAL-EA-0036 for determination of very low level NDMA in well water, w/encl (Privilege - FOIA ex 4)Cindy Caulk / Aerojet General CorpCharles Berrey / Environmental Protection Agency - Region 90144207491615-01650
1998/08/31Ltr: Transmits & discusses well aquifer designations & well logs, w/attchsCindy Caulk / Aerojet General CorpCharles Berrey / Environmental Protection Agency - Region 90145207511615-01654
1998/08/31Ltr: Response to comments on partial consent decree revisions, ref 7/16/98 ltr to D Barnes, w/enclThomas Pinkos / CA Regional Water Quality Control Board - Central Valley RegionDavid Spath / CA Dept of Health Services - Div of Drinking Water & Environmental Management0146207601615-92323
1998/09/00Exhibit 4 monitoring plan, w/TL fr C Caulk to C Berrey, 9/25/98Aerojet General CorpEnvironmental Protection Agency - Region 90147207671615-01702
1998/09/02Ltr: Approves 8/14/98 standard operating procedure (SOP) PAL-EA-0036 revision 0 for NDMA submitted 8/28/98Charles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General Corp0148207901615-92442
1998/09/03Ltr: Response to comments on perchlorate-impacted gw treatment plant potential process modifications & draft operation & maintenace manual, w/enclJeff Pugh / Earth Tech, IncCraig Fegan / Aerojet General Corp0149207921615-01692
1998/09/04Ltr: Proposes modifications to monitoring plans for GET facilities, zones 1-3, w/enclsCindy Caulk / Aerojet General CorpCharles Berrey / Environmental Protection Agency - Region 90150208131615-92724
1998/09/15Ltr: Comments on preliminary & final water supply alternatives rpt for Arden Cordova Water Service Alicante Way well #1Duncan Austin / CA Environmental Protection Agency - Dept of Toxic Substances ControlCindy Caulk / Aerojet General Corp0151208191615-92407
1998/09/17TL: Response to comments on GET F perchlorate treatment plant draft O&M manual & process modifications, & San Gabriel basin treatability study rptCindy Caulk / Aerojet General CorpCharles Berrey / Environmental Protection Agency - Region 90152208221615-92409
1998/09/23Ltr: Comments on technical memo - evaluation of perchlorate & NDMA in groundwater, zone 1 & western zone 2 study areasCharles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General Corp0153208241615-92413
1998/09/25Ltr: GET E exhibit 6(B)(5) rpt, per consent decreeCindy Caulk / Aerojet General CorpCharles Berrey / Environmental Protection Agency - Region 90154208281615-92414
1998/09/30Ltr: Additional comments on GET F perchlorate treatment plant proposed process modifications & draft O&M manualCharles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General Corp0155208311615-92417
1998/10/01Ltr: Comments on GET E exhibit 6(B)(5) ltr rptCharles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General Corp0156208341615-92418
1998/10/01Ltr: Comments on GET E exhibit 6(B)(5) ltr rptsAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp0157208361615-92422
1998/10/06Ltr: Comments on technical memo - evaluation of perchlorate & NDMA in groundwater, zone 1 & western zone 2 study areasAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp0158208381615-92423
1998/10/06Ltr: Review of response to comments on proposed modifications & draft O&M manual for GET F perchlorate treatment plantAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp0159208411615-92426
1998/10/13Ltr: Approval of NDMA & perchlorate data validation packages submitted 8/31/98Charles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General Corp0160208431615-92430
1998/10/14Ltr: No objection to proposed monitoring plan modifications for GET facilities, submitted per exhibit 6(F) of partial consent decreeAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp0161208451615-92432
1998/10/19Ltr: Comments on exhibit 4 monitoring planAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp0162208471615-92434
1998/10/23Ltr: Comments on GET E exhibit 6(B)(5) ltr rptDuncan Austin / CA Environmental Protection Agency - Dept of Toxic Substances ControlCindy Caulk / Aerojet General Corp0163208501615-92439
1998/10/26Ltr: Comments on exhibit 4 monitoring planCharles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General Corp0164208531615-92441
1998/10/27Ltr: Comments on exhibit 4(L) monitoring planDuncan Austin / CA Environmental Protection Agency - Dept of Toxic Substances ControlCindy Caulk / Aerojet General Corp0165208561615-92725
1998/10/27Ltr: Concurs with proposed revisions to monitoring plans for GET facilitiesDuncan Austin / CA Environmental Protection Agency - Dept of Toxic Substances ControlCindy Caulk / Aerojet General Corp0166208591615-92726
1998/10/28Ltr: Comments on exhibit 6(F) GET facilities monitoring plansCharles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General Corp0167208611615-92729
1998/11/20Ltr: Transmits draft response to comments on exhibit 4 monitoring plan, w/attch & TL to K Brasaemle fr C BerreyCindy Caulk / Aerojet General CorpCharles Berrey / Environmental Protection Agency - Region 90168208631615-01802
1998/12/00Technical Memo: Evaluation of perchlorate & NDMA in groundwater, zone 1 & western zone 2 study areas, w/attchs & TL to C Berrey et alGerald Swanick / Aerojet General Corp-0169208721615-01920
1998/12/14Ltr: Proposal to implement several OU feasibility studies (OUFS)Lawrence Hobel / Heller, Ehrman, White & McAuliffe (Attorneys)Rhonda Mims / US Dept of Justice - Environmental Enforcement Section0170210941615-01804
1998/12/23Ltr: Comments on revised exhibit 4 monitoring planAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp0171211011615-92745
1998/12/24Ltr: Comments on GET E exhibit 6(B)(5) ltr rptsAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp0172211031615-92930
1999/01/11Ltr: Exhibit 4 monitoring program for perchlorate & NDMA acceptable - separate municipal well sampling & reporting not requiredDennis Westcot / CA Regional Water Quality Control Board - Central Valley RegionSuzanne Phinney / Aerojet General Corp0173211061615-93006
1999/01/12Ltr: Exhibit 4(C) notification re compounds detected during 12/98 sampling of water supply wells & plans for further samplingCindy Caulk / Aerojet General CorpCharles Berrey / Environmental Protection Agency - Region 90174211081615-93042
1999/01/22Ltr: Approves Aerojet's response to agency comments on technical memo evaluation of perchlorate & NDMA in groundwater, zones 1 & 2Duncan Austin / CA Environmental Protection Agency - Dept of Toxic Substances ControlCindy Caulk / Aerojet General Corp - Environmental Operations0175211111615-93008
1999/02/16Ltr: Exhibit 4-3 NDMA analytical methods evaluation rptCindy Caulk / Aerojet General CorpCharles Berrey / Environmental Protection Agency - Region 90176211141615-93010
1999/02/23Ltr: Planned modifications to GET F perchlorate treatment plant - requests extension of startup periodCindy Caulk / Aerojet General CorpAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley Region0177211171615-93012
1999/02/26December 1998 exhibit 4 monitoring plan - 1st quarter results w/TL to C Berrey et al fr C Caulk 3/9/99 & marginalia--0178211201615-01990
1999/03/04Ltr: Approves extension of startup period for GET F perchlorate treatment plantAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp0179216011615-93014
1999/03/12Ltr: Comments on western groundwater OU (WGOU) RI/FS presentations on 1/27/99 & 3/05/99 w/enclCharles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General Corp0180216031615-93017
1999/03/23Ltr: Preliminary water supply alternatives rpt for private well at 11050 Folsom Blvd (Aerojet #1037), Rancho Cordova (Redacted, FOIA ex 6)Alexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionMary Guzik, Resident / City of Orangevale0181216071615-93279
1999/03/25Ltr: Accepts proposed changes to schedule for perchlorate treatment systemGary Carlton / CA Regional Water Quality Control Board - Central Valley RegionSuzanne Phinney / Aerojet General Corp - Environmental Operations0182216101615-93020
1999/03/31Ltr: Response to agency comments on technical memo re evaluation of perchlorate & NDMA in groundwater, zones 1 & 2Charles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General Corp0183216121615-93023
1999/03/31Ltr: Comments on 3/11/99 preliminary water supply alternatives rpt for well #1037Charles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General Corp0184216141615-93025
1999/04/001999-2000 groundwater monitoring plan, w/TL to C Berrey, et al 4/1/1999 & marginaliaAerojet General Corp-0185216161615-01895
1999/04/01Ltr: Confirms approval of 1998-99 exhibit 4 monitoring plan as revised 12/98Charles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General Corp0186217661615-93028
1999/04/29Ltr: Comments on 1999-2000 groundwater monitoring plan, exhibits 4 & 6Alexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp0187217681615-01837
1999/04/29Ltr: Agency concurs with actions proposed in 3/11/99 preliminary water supply alternatives rpt for well #1037Duncan Austin / CA Environmental Protection Agency - Dept of Toxic Substances ControlCindy Caulk / Aerojet General Corp - Environmental Operations0188217751615-92913
1999/04/29Ltr: Comments on 1999-2000 groundwater monitoring planDuncan Austin / CA Environmental Protection Agency - Dept of Toxic Substances ControlCindy Caulk / Aerojet General Corp - Environmental Operations0189217781615-92914
1999/04/29Ltr: Comments on 1999-2000 (groundwater) monitoring plan, Exhibits 4 & 6, submitted 4/1/99Charles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General Corp0190217811615-92915
1999/04/30Final water supply alternatives rpt for well #1037 (state well #9N/6E-25-L1) w/TL to C Berrey, et al fr C CaulkH S I GeoTrans, Inc-0191217841615-01970
1999/05/07Ltr: Requests schedule revision & extension on submittal of draft rpt for western groundwater OU (WGOU) FS w/attchGerald Swanick / Aerojet General Corp - Environmental OperationsAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley Region0192217971615-92986
1999/05/12Ltr: Comments on proposed schedule revision for western groundwater OU (WGOU) FSCharles Berrey / Environmental Protection Agency - Region 9Alexander MacDonald / CA Regional Water Quality Control Board - Central Valley Region0193218021615-93053
1999/05/13Ltr: Comments on 12/98 exhibit 4 monitoring plan 1st quarter results, submitted 3/09/99Charles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General Corp0194218051615-93054
1999/05/21Ltr: Acceptance of quality assurance project plan (QAPP)Alexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp0195218081615-92926
1999/05/24Ltr: Comments on water supply alternatives rpt for well 1037Charles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General Corp0196218101615-93059
1999/05/24Ltr: Updated Aerojet environmental laboratory methods & standard operating procedures (SOPs), w/encl 1 & marginalia 8/3/2000, w/o proceduresCindy Caulk / Aerojet General CorpCharles Berrey / Environmental Protection Agency - Region 90197218121615-93253
1999/06/00Biotreatability rpt re enhanced biodegradation of perchlorate & trichloroethene in groundwaterGeoSyntec ConsultantsAerojet General Corp0198218171615-01879
1999/06/00Draft treatability rpt on enhanced biodegradation of perchlorate & trichloroethene (TCE) in groundwaterGeoSyntec ConsultantsAerojet General Corp0199218781615-01963
1999/06/01Ltr: Approves final water supply alternatives rpt for well #1037 (state well #9N/6E-25-L1)Duncan Austin / CA Environmental Protection Agency - Dept of Toxic Substances ControlCindy Caulk / Aerojet General Corp - Environmental Operations0200219341615-92931
1999/06/03Ltr: Accepts final water supply alternatives rpt for well #1037 (state well #9N/6E-25-L1)Alexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp0201219371615-92934
1999/06/04Ltr: Response to agency comments on 1999-2000 groundwater monitoring plan w/TL to C Berrey, et al fr C CaulkAerojet General Corp-0202219391615-01959
1999/06/18Ltr: Further comments on 1999-2000 groundwater monitoring plan, exhibits 4 & 6Alexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp0203219601615-92941
1999/07/00Sampling & analysis of perchlorate in fertilizer, rev 3 (no EPA data) w/TL to S Phinney fr R Scott 7/7/99, TL to K Takata fr M Girard 7/8/99 & attchT R CPerchlorate Study Group0204219651615-01961
1999/07/06Ltr: Exhibit 4-3 NDMA analytical methods evaluation rptCindy Caulk / Aerojet General CorpCharles Berrey / Environmental Protection Agency - Region 90205221011615-92947
1999/07/15Ltr: Response to presentation & rpt on enhanced biodegradation of perchlorate & trichloroethene (TCE) in groundwaterDuncan Austin / CA Environmental Protection Agency - Dept of Toxic Substances ControlCindy Caulk / Aerojet General Corp0206221041615-92963
1999/07/16Ltr: No comment on draft biotreatability rpt re enhanced biodegradation of perchlorate & trichloroethene (TCE)Alexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp0207221071615-92952
1999/07/20Ltr: No further comments on 1999-2000 groundwater monitoring plan, exhibits 4 & 6Charles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General Corp0208221091615-92955
1999/07/21Ltr: No comments on draft rpt re enhanced biodegradation of perchlorate & trichloroethene (TCE) in groundwaterCharles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General Corp0209221111615-92959
1999/07/29Ltr: Approves delay in submitting western zone groundwater FS - discusses extraction well construction & evaluationGary Carlton / CA Regional Water Quality Control Board - Central Valley RegionSuzanne Phinney / Aerojet General Corp - Environmental Operations0210221131615-92964
1999/08/00Quality assurance (QA) manual for Aerojet Environmental Laboratory, w/TL to C Berrey fr C Caulk 9/21/99Karin Harris / Aerojet General Corp-0211221151615-02029
1999/08/02Ltr: Approves 1999-2000 groundwater monitoring plans, exhibits 4 & 6Charles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General Corp0212222731615-92967
1999/08/10Ltr: Acceptance of 1999-2000 groundwater monitoring plan, Exhibits 4 & 6 - issues re construction of added monitoring wells need resolutionAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp0213222751615-92973
1999/09/09Ltr: Response to agency comments on revision to western groundwater OU FS scheduleCindy Caulk / Aerojet General CorpCharles Berrey / Environmental Protection Agency - Region 90214222771615-93064
1999/10/15Ltr: Proposal re 1999-2000 exhibit 4 gw monitoring plan & Dept of Health Services requirements for sampling Citizens Utility District water supplyAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp0215222821615-93072
1999/10/25Ltr: Accepts 9/9/99 response to comments re revision to western groundwater OU FS schedule, with exception of item 1CCharles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General Corp0216222851615-93078
1999/10/26Memo: Exhibit 4 requirements for water supply alternatives rpts for wells closed due to perchlorate & NDMA contaminationAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionAerojet File0217222871615-92887
1999/10/27Ltr: Partial consent decree Exhibit 4 requirement for development of water supply alternatives rpts - transmits staff memo w/o attchThomas Pinkos / CA Regional Water Quality Control Board - Central Valley RegionChris Conley / Aerojet General Corp0218222911615-92905
1999/11/03Ltr: Comments re Aerojet 5/27/99 response to EPA quality assurance/quality control auditCharles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General Corp0219222941615-92907
1999/11/08Ltr: Comments on updated Aerojet environmental laboratory methods & Standard operating procedures w/attchsCharles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General Corp0220222971615-01868
1999/11/10Ltr: Approves quality assurance manual (QAM) for Aerojet Environmental Laboratory, dated 9/21/99Charles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General Corp0221223431615-93084
1999/11/17Ltr: Exhibit 4-3 NDMA analytical methods evaluation rptCindy Caulk / Aerojet General CorpCharles Berrey / Environmental Protection Agency - Region 90222223451615-93087
1999/12/01Ltr: Joint agency response to 8/17/99 quality assurance project plan (QAPP), w/attchCharles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General Corp0223223481615-93102
1999/12/17Ltr: Development of water supply alternatives rpt for Arden-Cordova Water Service well #14 (Aerojet well #1142)Cindy Caulk / Aerojet General CorpCharles Berrey / Environmental Protection Agency - Region 90224223521615-93094
1999/12/20Ltr: Suggests reactivation of wells 7, 12 & 21 since N-nitrosodimethylamine (NDMA) levels detected are below CA DOHS action levelsGerald Swanick / Aerojet General Corp - Environmental OperationsDonald Saddoris / Southern California Water Co0225223551615-93097
1999/12/22Ltr: Transmits & describes Western groundwater OU (WGOU) RI/FS model input data files, w/TL to C Berrey fr C Caulk, w/o enclThomas Panion / H S I GeoTrans, IncMarc Silva / Aerojet General Corp0226223571615-01997
1999/12/29Ltr: Plans for submitting RI/FS to National Remedy Review Board - transmits comments on draft Western groundwater OU (WGOU) RI/FSCharles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General Corp0227223661615-01998
2000/01/03Ltr: Requests MODFLOWT software loan & additional files for use with input data files for Western groundwater OU (WGOU) RI/FSCharles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General Corp0228223941615-93098
2000/01/07Ltr: Transmits & describes input data files for Western groundwater OU (WGOU) RI/FS model - will send MODFLOWT software later, w/o enclThomas Panion / H S I GeoTrans, IncKarla Brasaemle / Roy F Weston, Inc0229223961615-93099
2000/01/26Web Page: PerchlorateEnvironmental Protection Agency - Office of Water-0230224021615-02042
2000/01/27Ltr: Aerojet will address comments in 11/8/99 EPA ltr in next update of laboratory methods & operating procedures, scheduled for spring 2000Cindy Caulk / Aerojet General CorpCharles Berrey / Environmental Protection Agency - Region 90231224491615-93113
2000/01/28Ltr: Response to EPA comments on Aerojet response to quality assurance/quality control audit comments, w/attchCindy Caulk / Aerojet General CorpCharles Berrey / Environmental Protection Agency - Region 90232224511615-93114
2000/02/00Workplan for pilot test of in situ bioremediation of perchlorate & trichloroethene impacted groundwater, w/TL to C Berrey, et al fr C Caulk 2/29/2000GeoSyntec ConsultantsAerojet General Corp0233224561615-01911
2000/02/01Ltr: Comments on draft Western groundwater OU RI/FS dated 11/24/99Jess Morehouse / CA Dept of Health Services - Div of Drinking Water & Environmental ManagementCindy Caulk / Aerojet General Corp0234225131615-93119
2000/02/07Ltr: 1/28/2000 & 2/3/2000 comment ltrs fr Sacramento County re draft western groundwater OU (WGOU) RI/FS, w/enclsAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp0235225181615-01880
2000/02/11Ltr: Response to Regional Board request for schedule of Western groundwater OU (WGOU) RI/FS activities under cleanup & abatement order (CAO) #96-259Cindy Caulk / Aerojet General CorpAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley Region0236225341615-93128
2000/02/14Ltr: Comments on western groundwater OU RI/FS, on behalf of Citizens Utility CoNancy Casale / Cooper, White & Cooper (Attorneys)Alexander MacDonald / CA Regional Water Quality Control Board - Central Valley Region0237225371615-01881
2000/02/15Ltr: Comments on western groundwater OU RI/FSDuncan Austin / CA Environmental Protection Agency - Dept of Toxic Substances ControlCindy Caulk / Aerojet General Corp - Environmental Operations0238225541615-01882
2000/02/22Ltr: Requests information & plan re potential for NDMA reformation after destruction by ultraviolet radiationAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp0239225681615-93132
2000/02/29Ltr: Exhibit 4-3 NDMA analytical methods evaluation rptCindy Caulk / Aerojet General CorpCharles Berrey / Environmental Protection Agency - Region 90240225701615-93137
2000/03/02Ltr: Comments on groundwater extraction & treatment (GET) E/F perchlorate treatment plant startup rpt submitted 2/9/2000Charles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General Corp0241225731615-93139
2000/03/02Ltr: Concerns with comments on draft western groundwater OU RI/FS re reuse of treated groundwater for domestic useChris Conley / Aerojet General CorpDavid Spath / CA Dept of Health Services - Div of Drinking Water & Environmental Management0242225761615-93140
2000/03/10Ltr: Plans for testing to evaluate potential for reformation of NDMA after ultraviolet radiation treatmentCindy Caulk / Aerojet General CorpCharles Berrey / Environmental Protection Agency - Region 90243225791615-93147
2000/03/13Memo: Review (by Northern CA Geologic Services Unit) of 11/24/99 draft western groundwater OU RI/FS gw capture maps, w/attchsHarold Duke / CA Environmental Protection Agency - Dept of Toxic Substances ControlDuncan Austin / CA Environmental Protection Agency - Dept of Toxic Substances Control0244225821615-01884
2000/03/16Ltr: Comments on revised groundwater extraction & treatment (GET) E/F facility rpt submitted 2/29/2000Charles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General Corp0245226031615-93152
2000/03/16Ltr: NDMA treatment, reformulation, & low wattage reliability evaluation - comments on workplan & response to agency requestCharles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General Corp0246226061615-93153
2000/03/17Ltr: Preliminary comments, on behalf of Southern CA Water Co, re draft western groundwater OU RI/FSGary Ottoson / Haight, Brown & Bonesteel (Attorneys)Alexander MacDonald / CA Regional Water Quality Control Board - Central Valley Region0247226101615-01889
2000/03/21Ltr: Results of samples collected fr 3 Arden-Cordova wells for perchlorate analysisAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp0248226181615-93155
2000/03/21Ltr: Determinations re proposed addition of polymer at groundwater extraction & treatment (GET) E/F treatment unitAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp0249226201615-93157
2000/03/21Ltr: Comments on final phase 2 treatability study workplan, pilot scale groundwater treatment system - application to Baldwin Park OUAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp0250226221615-93158
2000/03/28Ltr: Approves 6/99 enhanced biodegradation of perchlorate & trichloroethene in groundwater biotreatability rptCharles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General Corp0251226251615-93161
2000/03/28Ltr: Approves workplan for pilot test of in situ bioremediation of perchlorate & trichloroethene impacted groundwater, with commentsCharles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General Corp0252226271615-93175
2000/03/29Ltr: Concurs with proposal to sample & analyze for NDMA reformation & requests additional informationDuncan Austin / CA Environmental Protection Agency - Dept of Toxic Substances ControlCindy Caulk / Aerojet General Corp - Environmental Operations0253226291615-93162
2000/04/05Ltr: Comments on draft sampling & analysis plan (SAP), phase 2 treatability study workplan for Baldwin Park OUAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp0254226321615-93163
2000/04/07Ltr: Method to proof improved NDMA detection standard operating procedure in absence of commercially available sample blanksCharles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General Corp0255226351615-93165
2000/04/11Ltr: Comments on revised groundwater extraction & treatment (GET) E/F facility rptAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp0256226371615-93167
2000/04/13Ltr: Results of sampling on 4/10/2000 fr groundwater extraction & treatment (GET) F facility, volatile organic compound (VOC) analysisAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp0257226401615-93168
2000/04/20Ltr: Comments on draft sampling analysis plan, phase treatability study workplan for Baldwin Park OU, submitted 3/22/2000Charles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General Corp0258300011615-93216
2000/04/20Ltr: Comments on 2000-2001 groundwater monitoring planCharles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General Corp0259300031615-93217
2000/04/21Ltr: Comments on 2000-2001 groundwater monitoring plan, exh 4 public & private supply wells & exh 6 monitoring wells for zones 1-4Alexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp0260300081615-93221
2000/04/24Response to agency comments on draft western groundwater OU (WGOU) RI/FS, w/TL to C Berrey, et al fr Cindy CaulkAerojet General Corp-0261300141615-02003
2000/04/28Ltr: Laboratory audit rpts (8) prepared by Laboratory Data Consultants Inc, w/attchs (Privilege - FOIA ex 4)Cindy Caulk / Aerojet General CorpCharles Berrey / Environmental Protection Agency - Region 90262301111615-01901
2000/04/28Ltr: Concurrence with EPA comments on GET E/F perchlorate treatment plant startup rpt & additional commentAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp0263301131615-93223
2000/05/02Ltr: Concurs with workplan for pilot test of in-situ bioremediation of perchlorate & trichloroethylene (TCE) impacted groundwaterDuncan Austin / CA Environmental Protection Agency - Dept of Toxic Substances ControlCindy Caulk / Aerojet General Corp0264301151615-93194
2000/05/02Ltr: Comments on 2000-2001 groundwater monitoring planDuncan Austin / CA Environmental Protection Agency - Dept of Toxic Substances ControlCindy Caulk / Aerojet General Corp - Environmental Operations0265301181615-93195
2000/05/03Ltr: Comments on revised groundwater extraction & treatment E/F (GET E/F) facility rpt dated 2/29/2000Duncan Austin / CA Environmental Protection Agency - Dept of Toxic Substances ControlCindy Caulk / Aerojet General Corp - Environmental Operations0266301221615-93196
2000/05/03Ltr: Clarifies dept position on reuse of treated groundwater as option for draft western gw OU (WGOU), w/TL to C Berrey, et al fr C Caulk 5/9/2000David Spath / CA Dept of Health Services - Div of Drinking Water & Environmental ManagementChris Conley / Aerojet General Corp0267301281615-93197
2000/05/31Ltr: Exhibit 4-3 NDMA analytical methods evaluation rpt, w/enclCindy Caulk / Aerojet General CorpCharles Berrey / Environmental Protection Agency - Region 90268301321615-01912
2000/05/31Quality assurance project plan (QAPP) for site, w/TL to C Berrey, et al fr C CaulkAerojet General Corp-0269301761615-02030
2000/06/002nd rev preliminary water supply alternatives rpt for county well #17 (Aerojet #1030), w/attchs & TL to C Berrey, et al fr C Caulk 6/15/2000Aerojet General Corp-0270303021615-01917
2000/06/00Final 2000-2001 groundwater monitoring plan, w/TL to C Berrey fr C Caulk 6/2/2000Aerojet General Corp-0271303171615-01921
2000/06/00Final rev preliminary & final water supply alternatives rpt for Arden-Cordova wells #11, 13, 15, 16 & 19, w/encls & TL to C Berrey, et al fr C CaulkAerojet General Corp-0272304841615-01922
2000/06/01Ltr: Comments on western groundwater OU (WGOU) RI/FS - baseline risk assessment requires revision, w/attchCharles Berrey / Environmental Protection Agency - Region 9Alexander MacDonald / CA Regional Water Quality Control Board - Central Valley Region0273305071615-01919
2000/06/01Ltr: Updated Aerojet environmental laboratory methods & Standard operating procedures, w/encls (Privilege - FOIA ex 4)Cindy Caulk / Aerojet General CorpCharles Berrey / Environmental Protection Agency - Region 90274305221615-02025
2000/06/08Ltr: Final western gw OU (WGOU) RI/FS adequate for remedy selection - agencies will attach addendum noting areas of disagreementDuncan Austin / CA Environmental Protection Agency - Dept of Toxic Substances ControlAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley Region0275305241615-93199
2000/06/08Ltr: Final western groundwater OU (WGOU) RI/FS adequate for remedy selection - discusses preferred alternativesDuncan Austin / CA Environmental Protection Agency - Dept of Toxic Substances ControlCharles Berrey / Environmental Protection Agency - Region 90276305271615-93200
2000/06/09Results of exhibit 5 sampling (12/3/97, 12/2/98, 3/3/99, 9/99, & 6/9/2000), w/TLs to Charles Berrey et al fr C CaulkAerojet General Corp - Environmental Operations-0277305311615-01937
2000/06/13Ltr: Joint agency response to revised western groundwater OU RI/FS - water supply contingency plan & baseline risk assessment concerns, w/attchsAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp0278305831615-01913
2000/06/13Ltr: Remedial alternatives for western groundwater OU (WGOU) & EPA preferred alternative, w/attchsAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCharles Berrey / Environmental Protection Agency - Region 90279306121615-01914
2000/06/15Memo: Results of work performed to evaluate NDMA reformation in GET A, B, & E/F facility effluents & effluent receiving waters, w/attchsCindy Caulk / Aerojet General CorpCharles Berrey / Environmental Protection Agency - Region 90280306271615-01915
2000/06/15Ltr: Progress rpt (4/00-5/00) on phase 2 treatability study treatment system, w/appendicesTravis Meyer / Harding E S EWayne Praskins / Environmental Protection Agency - Region 90281306321615-01918
2000/06/16Phase 3 workplan - field pilot of perchlorate removal using SERIX technology, w/TL to C Berrey, et al fr C Caulk (Privilege - FOIA ex 4)Electrochemical Design Assoc, IncAerojet General Corp0282311741615-01902
2000/06/16Ltr: Response to EPA comments on draft biofouling control rpt re GET F facilty, w/TL to C Berrey et al fr C CaulkTravis Meyer / Harding E S ECindy Caulk / Aerojet General Corp0283311761615-93201
2000/06/20Ltr: Comments on 4/2000-5/2000 progress rpt re phase 2 treatability study system for Baldwin Park OUAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp0284311821615-93191
2000/06/21Ltr: Review of phase 3 workplan for field pilot test of perchlorate removal using SERIX - clarifications needed before approvalCharles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General Corp0285311851615-93202
2000/06/21Ltr: Comments re workplan for field pilot test of perchlorate removal using SERIXAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp0286311871615-93203
2000/06/21Agreement for temporary water system interconnection (to provide alternate water supply) w/TL to J Uranga 7/5 & TL to A MacDonald fr C Caulk 8/4/2000Martha Clacky / City of Folsom-0287311891615-93256
2000/06/26Memo: General & specific comments on individual Aerojet quality control laboratories standard operating procedures (SOPs), w/attchsKen Brown / Environmental Protection Agency - National Exposure Research LaboratoryCharles Berrey / Environmental Protection Agency - Region 90288311951615-02011
2000/06/26Ltr: Review & approval of exhibit 4-3 NDMA analytical methods evaluation rpt - suggestions for next quarterly rptCharles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General Corp0289312231615-93205
2000/06/26Ltr: Review of response to comments on GET F draft biofouling control study rpt - EPA has no further commentsCharles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General Corp0290312251615-93206
2000/06/27Ltr: Review & acceptance of final 2000-20001 groundwater monitoring plan submitted 6/2/2000Charles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General Corp0291312271615-93208
2000/06/27Ltr: Review & acceptance of NDMA reformation evaluation for GET A, B, & E/F high wattage ultraviolet/peroxide (UV/OX) treatmentCharles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General Corp0292312291615-93209
2000/07/10Ltr: Response to EPA & regional board comments on workplan for field pilot test of perchlorate removal using SERIXCindy Caulk / Aerojet General CorpCharles Berrey / Environmental Protection Agency - Region 90293312311615-93238
2000/07/10Very unofficial status on perchlorate toxicology & ecological studies (update on project status & schedule)Mike Girard / Aerojet General Corp-0294312351615-93246
2000/07/11Ltr: Information in response to request for monitoring of GET F effluent, w/attchs (water quality analytical results)Cindy Caulk / Aerojet General CorpAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley Region0295312401615-02015
2000/07/12Ltr: Comments on quality assurance project plan (QAPP), dated 5/31/2000Alexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp0296313061615-93239
2000/07/12Ltr: Comments on final revised preliminary & final water supply alternatives rpt for 5 Arden-Cordova wells & 5 state wellsAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp0297313091615-93240
2000/07/12Ltr: Joint agency comments on 2nd revised preliminary water supply alternatives rpt (PWSAR) for county well #17 (Aerojet # 1030)Alexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp0298313121615-93241
2000/07/13National Remedy Review Board (NRRB) presentation package for western gw OU presentation 8/22/2000, w/TL to C Caulk fr C Berrey 7/24/2000Charles Berrey / Environmental Protection Agency - Region 9-0299313151615-02020
2000/07/14Ltr: Progress rpt (6/00) on phase 2 treatability study treatment system, w/attchsTravis Meyer / Harding E S EWayne Praskins / Environmental Protection Agency - Region 90300314151615-02032
2000/07/17Ltr: Response to comments on rev 2000-2001 groundwater monitoring plan exhibits 4 & 6 - will submit new gw monitoring well recommendations by 7/31/200Cindy Caulk / Aerojet General CorpAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley Region0301316551615-93243
2000/07/20Ltr: Response to joint agency comments on rev western groundwater OU (WGOU) RI/FS, w/attch (response to comments re baseline risk assessment)Cindy Caulk / Aerojet General CorpCharles Berrey / Environmental Protection Agency - Region 90302316571615-02019
2000/07/24Ltr: Conditionally approves workplan for field pilot test of perchlorate removal using SERIX - inadequate response to comment 5 re confidentialityCharles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General Corp0303316701615-93244
2000/07/28Phase 3 sample & analysis plan (draft) - field pilot of perchlorate removal using SERIX, w/TL to C Berrey, et al fr C Caulk (Privilege - FOIA ex 4)Electrochemical Design Assoc, IncAerojet General Corp0304316721615-02022
2000/07/31Ltr: Proposal to install wells in western groundwater OU study area, w/map of proposed well locationsCindy Caulk / Aerojet General CorpAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley Region0305316741615-93254
2000/08/01Ltr: Review of reponse to request for monitoring of GET F effluent, w/attchAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp0306316791615-93247
2000/08/01Ltr: Review of response to comments on revised western groundwater OU (WGOU) RI/FSCharles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General Corp0307316831615-93248
2000/08/02Ltr: Clarification & agreement on approach to revised western groundwater OU (WGOU) RI/FS baseline risk assessment (BRA)Cindy Caulk / Aerojet General CorpCharles Berrey / Environmental Protection Agency - Region 90308316871615-93249
2000/08/02Ltr: Response to comments on phase 2 treatability study progress rpt & draft sampling & analysis plan, w/responses, w/o proposed sampling schedule revCindy Caulk / Aerojet General CorpCharles Berrey / Environmental Protection Agency - Region 90309316891615-93255
2000/08/03Ltr: Approves updated Aerojet laboratory methods submitted 6/1/2000 with exception of PAL-MS-005 Rev 2 - transmits comments fr NERL, w/attchCharles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General Corp0310316951615-02023
2000/08/03Ltr: Comments on quality assurance project plan (QAPP) - transmits signed approval p, w/attchCharles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General Corp0311317201615-93250
2000/08/03Ltr: Approves phase 3 sampling & analysis plan, field pilot test of perchlorate removal using SERIX - need more detailed plan in futureCindy Caulk / Aerojet General CorpCharles Berrey / Environmental Protection Agency - Region 90312317231615-93251
2000/08/08Ltr: Comments on 6/2000 progress rpt for phase 2 treatability studyAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp0313317251615-93257
2000/08/10Ltr: Results of samples collected 7/19/2000 fr GET F & ARGET for perchlorate & volatile organic compound (VOC) analysesAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp0314317271615-93258
2000/08/15Ltr: Regional board comments on 4/2000-5/2000 progress rpt for phase 2 treatability study system have been adequately addressedAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp0315317291615-93267
2000/08/21Ltr: Comments on National Remedy Review Board presentation for western groundwater OU-3, w/attchGerald Swanick / Aerojet General Corp - Environmental OperationsCharles Berrey / Environmental Protection Agency - Region 90316317311615-02031
2000/08/21Ltr: Response to comments on revised western groundwater OU (WGOU) RI/FS & agency request for alternate water supply contingency planCindy Caulk / Aerojet General CorpAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley Region0317317411615-93259
2000/08/21Ltr: Agencies have no objection to proposed monitor well locations & installation schedule for western groundwater OUAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp0318317451615-93260
2000/08/23Phase 3 workplan - field pilot of perchlorate removal using SIRS (revised to exclude confidential business information), w/TL to C Berrey fr C CaulkAerojet General Corp-0319317471615-02034
2000/08/29Ltr: Response to Regional Board comments on monitoring of GET F effluentCindy Caulk / Aerojet General CorpAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley Region0320317611615-93268
2000/08/31Ltr: Exhibit 4-3 NDMA analytical methods evaluation rpt, w/encl (audit rpt ltr) (Privilege - FOIA ex 4)Cindy Caulk / Aerojet General CorpCharles Berrey / Environmental Protection Agency - Region 90321317651615-02040
2000/08/31Ltr: Review of response to comments on SERIX workplan - no additional commentsCharles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General Corp0322317671615-93262
2000/08/31Ltr: Exhibit 4-3 NDMA analytical methods evaluation rpt, w/o encl (audit rpt ltr)Cindy Caulk / Aerojet General CorpCharles Berrey / Environmental Protection Agency - Region 90323317691615-93271
2000/09/19List of guidance documents consulted for western groundwater OUEnvironmental Protection Agency - Region 9-0324317721615-93270
2000/09/21Western groundwater OU RI/FS, v2 of 3 - Appendix A, RI rpt & appendix B, baseline risk assessment (4/14/2000, updated 9/21/2000)Aerojet General Corp-0325317771615-02044
2000/09/26Western groundwater OU RI/FS, v3 of 3 - Appendices C-E (4/14/2000, updated 9/26/2000)Aerojet General Corp-0326400011615-02045
2000/10/03Western groundwater OU RI/FS, v1 of 3, w/TLs (4/2000, updated 10/3/2000)Aerojet General Corp-0327403791615-02043
2000/10/04Memo: National Remedy Review Board recommendations for Western groundwater OU, w/marginaliaBruce Means / Environmental Protection Agency - National Remedy Review BoardKeith Takata / Environmental Protection Agency - Region 90328406911615-93284
2000/10/11Memo: Response to National Remedy Review Board recommendations for Western groundwater OUKeith Takata / Environmental Protection Agency - Region 9Bruce Means / Environmental Protection Agency - National Remedy Review Board0329406961615-93283
1997/10/21Oversize maps & drawings (44 sheets): Perchlorate treatment plant, plant location & plans, 15 x 21.25 in, scale varies (mapcase)Donald King / Earth Tech, Inc-0330406991615-01564
1999/06/00Compact Disc: Updated Aerojet groundwater data for 6/99 (DBF format) (media cabinet)Aerojet General Corp-0331407441615-01956
2000/11/00Fact Sheet: EPA announces public comment period on proposed plan - Western groundwater OUEnvironmental Protection Agency - Region 9-033250011615-93299
2000/11/00Fact Sheet: EPA proposes plan to address groundwater contamination in Western area of siteEnvironmental Protection Agency - Region 9-033350041615-02238
2000/11/30Public Notice: EPA announces public comment period on proposed plan for site - Western groundwater OUEnvironmental Protection Agency - Region 9-033450191615-93300
2000/01/09Ltr: Transcript of OU #3 proposed plan public meeting has been forwardedCharles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General Corp033550211615-93395
2000/02/05TL: Proposed plan for addressing groundwater contamination in western areaCharles Berrey / Environmental Protection Agency - Region 9Patricia Port / US Dept of the Interior033650231615-93396
2000/02/05TL: Proposed plan for addressing groundwater contamination in western areaCharles Berrey / Environmental Protection Agency - Region 9Terry Harwood / US Dept of Agriculture - Hazardous Materials Management Group033750251615-93397
2000/02/05TL: Proposed plan for addressing groundwater contamination in western areaCharles Berrey / Environmental Protection Agency - Region 9David Kennedy / National Oceanic & Atmospheric Administration - Office of Response & Restoration033850271615-93398
2000/02/05TL: Proposed plan for addressing groundwater contamination in western areaCharles Berrey / Environmental Protection Agency - Region 9Edwin Lowry / CA Environmental Protection Agency - Dept of Toxic Substances Control033950291615-93399
2000/02/05TL: Proposed plan for addressing groundwater contamination in western areaCharles Berrey / Environmental Protection Agency - Region 9Robert Hight / CA Dept of Fish & Game034050311615-93400
2000/10/26Phase 2 treatment system 10/00 interpretive rpt, Baldwin Park OU, San Gabriel Basin, w/TL to W Praskins fr J CattsHarding E S EEnvironmental Protection Agency - Region 9034150331615-02322
2000/12/01Memo: Exhibit 4-3 NDMA analytical methods evaluation rpt (AMER), w/encl (privileged, FOIA ex 4)Cindy Caulk / Aerojet General CorpCharles Berrey / Environmental Protection Agency - Region 9034253651615-02261
2000/12/05Web Page: Aerojet cleanup may take 240 yearsStuart Leavenworth / Sacramento Bee-034353671615-93421
2000/12/07Mtg Agenda: 12/7/2000 community mtg re Western groundwater OU proposed plan, w/handoutsCharles Berrey / Environmental Protection Agency - Region 9-034453711615-02271
2000/12/07Transcript of community meeting, w/TL to C Berrey fr K Brasaemle 1/5/01Environmental Protection Agency - Region 9-034553831615-02325
2000/12/08Ltr: Requests delay in submittal of revised alternate water supply contingency plan for Western groundwater OU RI/FSCindy Caulk / Aerojet General CorpAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley Region034655081615-93337
2000/12/10Newsclip: EPA, Aerojet debate best cleanup methodSekhar Padmanabhan / Sacramento Bee-034755101615-93430
2000/12/13Ltr: Joint agency response to revised preliminary water supply alternatives rpt for perchlorate detected in Arden-Cordova well #1 (Aerojet well #1011)Alexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp034855131615-93339
2000/12/15Ltrs(4): Progress rpts (7/00, 8/00, 10/00 & 11/00) on phase 2 treatability study treatment system, w/attchsTravis Meyer / Harding E S EWayne Praskins / Environmental Protection Agency - Region 9034955161615-02267
2000/12/15Custom low-pressure UV/oxidation treatment technology rpt, application to drinking water, Baldwin Park OU, San Gabriel Basin, w/TL to R SakajiHarding E S ECA Dept of Health Services035059431615-02324
2000/12/19Ltr: Review & disapproval of 12/1/00 exhibit 4-3 NDMA analytical methods evaluation rpt (AMER) - requests addendumCharles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General Corp0351510791615-93322
2001/01/00Fact Sheet: 2nd public meeting for comments on proposed plan for western groundwater OUEnvironmental Protection Agency - Region 9-0352510811615-93390
2001/01/09Ltr: Response to comments on western groundwater OU RI/FS, revised alternate water supply contingency plan, w/enclsCindy Caulk / Aerojet General CorpAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley Region0353510841615-02340
2001/01/12Ltr: Comments on custom low-pressure UV/oxidation treatment technology rpt, application to drinking water systems, Baldwin Park OU, San Gabriel BasinAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionRick Sakaji / CA Dept of Health Services0354510931615-93401
2001/01/17Mtg Agenda: 2nd community meetingCharles Berrey / Environmental Protection Agency - Region 9-0355510961615-02326
2001/01/17Transcript - 2nd community meeting, Rancho Cordova, w/TLs to C Caulk fr C Berrey 3/9/01 & to C Berrey fr K Brasaemle 3/2/01Environmental Protection Agency - Region 9-0356511091615-02385
2001/01/17Public Notice: 2nd public meeting for comments on proposed plan for western groundwater OU, w/attchEnvironmental Protection Agency - Region 9Grapevine Independent, The (Newspaper)0357512221615-93393
2001/01/17Newsclip: Water cleanup modes spark more discussionShelly Blanchard / Grapevine Independent, The (Newspaper)-0358512261615-93410
2001/01/17Ltr: Comments on OU3 proposed plan, western groundwater OU (redacted, FOIA ex 6)Marla Arnold, resident / City of Rancho CordovaEnvironmental Protection Agency - Region 90359512291615-93472
2001/01/24Ltr: Comments on proposed plan for OU3 (western groundwater OU)Alan Hunter / Rancho Cordova Chamber of CommerceCharles Berrey / Environmental Protection Agency - Region 90360512311615-93474
2001/01/25Ltr: Comments on proposed plan for OU3 (western groundwater OU)LaNell Little / Carmichael Water DistrictCharles Berrey / Environmental Protection Agency - Region 90361512331615-93475
2001/01/25Ltr: Comments on proposed plan for OU3 (western groundwater OU)Jim Sequeira / City of Sacramento - Dept of UtilitiesCharles Berrey / Environmental Protection Agency - Region 90362512361615-93476
2001/01/26Email: Comments on OU3 proposed plan, western groundwater OU (redacted, FOIA ex 6)Michael Gallagher, resident / City of SacramentoCharles Berrey / Environmental Protection Agency - Region 90363512401615-93473
2001/01/26Ltr: Comments on proposed plan for OU3 (western groundwater OU)Lou Blanas / Sacramento County - Sheriff's DeptCharles Berrey / Environmental Protection Agency - Region 90364512421615-93477
2001/01/27Ltr: Comments on proposed plan for OU3 (western groundwater OU)Rebecca Garrison / Sacramento Transportation Management AssnCharles Berrey / Environmental Protection Agency - Region 90365512441615-93478
2001/01/29Comments on proposed plan for OU3 (western groundwater OU), w/TL to C Berrey fr G SwanickAerojet General CorpEnvironmental Protection Agency - Region 90366512461615-02386
2001/01/29Ltr: Request for extension to public comment period for western groundwater OU proposed planGerald Swanick / Aerojet General Corp - Environmental OperationsCharles Berrey / Environmental Protection Agency - Region 90367513051615-93422
2001/01/29Email: Comments on OU3 proposed plan, western groundwater OU (redacted, FOIA ex 6)Linda Budge, resident / Sacramento CountyCharles Berrey / Environmental Protection Agency - Region 90368513071615-93468
2001/01/29Email: Comments on OU3 proposed plan, western groundwater OU (redacted, FOIA ex 6)Robert McGarvey, resident / City of Rancho CordovaCharles Berrey / Environmental Protection Agency - Region 90369513101615-93469
2001/01/29Ltr: Comments on OU3 proposed plan, western groundwater OU (redacted, FOIA ex 6)Jeanne Dunkinson, resident / City of Rancho CordovaCharles Berrey / Environmental Protection Agency - Region 90370513121615-93470
2001/01/29Ltr: Comments on proposed plan for OU3 (western groundwater OU)Russell Hammer / Sacramento Metropolitan Chamber of CommerceCharles Berrey / Environmental Protection Agency - Region 90371513141615-93479
2001/01/30Ltr: Comments on proposed plan for OU3 (western groundwater OU)Nancy Casale / Cooper, White & Cooper (Attorneys)Charles Berrey / Environmental Protection Agency - Region 90372513171615-02387
2001/01/30Ltr: Comments on proposed plan for OU3 (western groundwater OU)Darrell Eck / Sacramento County - Dept of Water ResourcesCharles Berrey / Environmental Protection Agency - Region 90373513391615-02389
2001/01/30Ltr: Request denied for extension to public comment period for western groundwater OU proposed planCharles Berrey / Environmental Protection Agency - Region 9Gerald Swanick / Aerojet General Corp - Environmental Operations0374513461615-93402
2001/01/30Ltr: Request denied for extension to public comment period for western groundwater OU proposed plan (concurrence copy)Charles Berrey / Environmental Protection Agency - Region 9Gerald Swanick / Aerojet General Corp - Environmental Operations0375513491615-93403
2001/01/30Email: Comments on OU3 proposed plan, western groundwater OU (redacted, FOIA ex 6)Terry Cochran, resident / City of FolsomCharles Berrey / Environmental Protection Agency - Region 90376513521615-93471
2001/01/30Ltr: Comments on proposed plan for OU3 (western groundwater OU), w/TLJanis Heple / Environmental Council of Sacramento, IncCharles Berrey / Environmental Protection Agency - Region 90377513541615-93480
2001/01/30Ltr: Comments on proposed plan for OU3 (western groundwater OU)William Koska / Bacalski, Byrne & Koska (attorneys)Charles Berrey / Environmental Protection Agency - Region 90378513571615-93482
2001/01/31Ltr: Supplemental response to request for monitoring of GET F effluent, w/enclCindy Caulk / Aerojet General CorpAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley Region0379513621615-02343
2001/02/00Fact Sheet: EPA proposes formation of community advisory groupEnvironmental Protection Agency - Region 9-0380515881615-93391
2001/02/01Ltr: Transmits responses to cleanup & abatement order (CAO) #500-718, perchlorate at GET D, w/attchsCindy Caulk / Aerojet General CorpAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley Region0381515911615-02350
2001/02/01Ltr: Draft alternative water supply contingency planAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionDonald Saddoris / Southern California Water Co0382516521615-93404
2001/02/01Ltr: Response to comments on western groundwater OU RI/FS, revised alternative water supply contingency planAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp0383516551615-93405
2001/02/01Memo: Reservoir construction request for Mather Golf CourseRon Suter / Sacramento County - Dept of Regional Parks, Recreation & Open SpaceCharles Berrey / Environmental Protection Agency - Region 90384516591615-93484
2001/02/09Exhibit 5(G)(7) American River sampling, w/TL fr C Caulk 2/19/01Aerojet General Corp-0385516631615-02348
2001/02/13Ltr: Western groundwater OU cleanup values, w/attchAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCharles Berrey / Environmental Protection Agency - Region 90386516771615-02327
2001/02/14Review of CA Dept Health Services low-level NDMA Performance Evaluation study, w/attchs & TL to C Berrey fr K Brown 2/21/01Russell Plumb, Jr / Lockheed Martin Corp-0387516921615-02349
2001/02/20Ltr: Comments on workplan for pilot testing of in-situ bioremediation of perchlorate in recharge water at GET DAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp0388517021615-93428
2001/02/22Ltr: Receipt of supplemental response to request for monitoring of GET E/F effluentAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp0389517051615-93425
2001/02/23Ltr: City of Folsom interim water supplyGerald Swanick / Aerojet General Corp - Environmental OperationsDonald Saddoris / Southern California Water Co0390517071615-93407
2001/02/26Ltr: Results of sampling Arden-Cordova water service wells for NDMAAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionJim Carson / Southern California Water Co - Arden-Cordova Water Service0391517101615-93445
2001/02/27Ltr: Response to comments, western groundwater OU, revised alternative water supply contingency plan, w/attchCindy Caulk / Aerojet General CorpAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley Region0392517121615-93406
2001/02/28Ltr: Exhibit 4-3 NDMA analytical methods evaluation rpt, w/enclCindy Caulk / Aerojet General CorpCharles Berrey / Environmental Protection Agency - Region 90393517161615-93429
2001/03/02Ltr: Supplemental response to request for monitoring of GET E/F effluent, w/enclCindy Caulk / Aerojet General CorpAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley Region0394517221615-02362
2001/03/03Public Notice: EPA announces formation of community advisory groupEnvironmental Protection Agency - Region 9Sacramento Bee0395517321615-93392
2001/03/07Ltr: Disapproval of exhibit 4-3 NDMA analytical methods evaluation rpt, w/attchsCharles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General Corp0396517341615-02352
2001/03/09Exhibit 5(G)(7) American River sampling results, w/TL fr C Caulk 3/12/01Aerojet General Corp-0397517461615-02353
2001/03/12Ltr: Response to agency request on GET B 3-dimensional hydraulic evaluation, low-wattage UV treatment costs & GET B modification scheduleCindy Caulk / Aerojet General CorpCharles Berrey / Environmental Protection Agency - Region 90398517601615-93434
2001/03/12Ltr: Comments on exhibit 4-4 NDMA analytical methods evaluation rptAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp0399517641615-93436
2001/03/16Ltr: Response to CA RWQCB-CV comments on workplan for pilot testing of in-situ bioremediation to treat perchlorate in recharge water at GET D, w/attchEvan Cox / GeoSyntec ConsultantsScott Neville / Aerojet General Corp - Environmental Operations0400517661615-02355
2001/03/20Ltr: Comments on western groundwater OU RI/FS, revised alternative water supply contingency planAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp0401517721615-93438
2001/03/20Ltr: GET facilities power reduction proposalCindy Caulk / Aerojet General CorpCharles Berrey / Environmental Protection Agency - Region 90402517751615-93439
2001/03/23Ltr: GET facilities power reduction proposal approvedAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp0403517771615-93441
2001/03/23Ltr: Approval of workplan for pilot testing of in-situ bioremediation of perchlorate in recharge water at GET DAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp0404517791615-93442
2001/03/27Ltr: Requests response to 1/30/01 ltr re comments on proposed plan for OU3 (western groundwater OU), w/enclWilliam Koska / Bacalski, Byrne & Koska (attorneys)Charles Berrey / Environmental Protection Agency - Region 90405517811615-02388
2001/04/002001-02 groundwater monitoring plan, w/TL fr C Caulk 4/2/01Aerojet General Corp-0406517881615-02358
2001/04/00Workplan for in-situ oxidation pilot system at line 04 site 30F, w/TL fr C Caulk 4/25/01Hackenberry Assoc, L L CAerojet General Corp0407519261615-02363
2001/04/00Draft final phase 2 treatability study rpt, GET E/F treatment facility, w/TL to W Praskins fr J Catts 4/18/01Harding E S EEnvironmental Protection Agency - Region 90408519421615-02368
2001/04/01Ltr: Request for alternative water supply for Rancho CordovaAnthony Pescetti / CA Assembly - Office of Anthony PescettiCharles Berrey / Environmental Protection Agency - Region 9040960011615-93485
2001/04/04Western groundwater OU alternate water supply contingency plan, w/encls & TL to A MacDonald fr C CaulkAerojet General CorpCA Regional Water Quality Control Board - Central Valley Region041060051615-02364
2001/04/04Ltr: Sacramento Environmental Commission interested in community involvement process, w/enclThomas Malson / Sacramento Environmental CommissionCharles Berrey / Environmental Protection Agency - Region 9041160191615-93446
2001/04/05Ltrs(31): Monthly sampling results for well #1816 (8N/7E-3-E1), 9/98-3/01, w/attchsCindy Caulk / Aerojet General CorpCharles Berrey / Environmental Protection Agency - Region 9041260241615-01839
2001/04/05Ltrs(14): Monthly sampling results for well #1011 (9N/6E-35-C2, Arden Cordova #1), 3/00-3/01, w/attchsCindy Caulk / Aerojet General CorpCharles Berrey / Environmental Protection Agency - Region 9041360871615-01909
2001/03/27Ltrs(25): Monthly sampling results for well #1036 (9N/6E-1G1), 2/99-11/00 & 1/01-2/01, w/attchsCindy Caulk / Aerojet General CorpCharles Berrey / Environmental Protection Agency - Region 9041461221615-01949
2001/04/05Ltrs(25): Monthly sampling results for well #1012 (9N/6E-35M1, Arden Cordova well #5), 2/99-8/00 & 10/00-3/01, w/attchsCindy Caulk / Aerojet General CorpCharles Berrey / Environmental Protection Agency - Region 9041561731615-01950
2001/04/05Ltrs(25): Monthly sampling results for well #1135 (9N/6E-34L1, Arden Cordova #4), 2/99-3/99, 5/99-3/01, w/attchsCindy Caulk / Aerojet General CorpCharles Berrey / Environmental Protection Agency - Region 9041662241615-01951
2001/04/05Ltrs(18): Monthly sampling results for TCE & perchlorate in well #1017 (Mitchell Jr High School, 9N/6E-25-D2) for 12/99-3/01, w/attchsCindy Caulk / Aerojet General CorpCharles Berrey / Environmental Protection Agency - Region 9041762751615-01999
2001/04/05Ltrs(7): Monthly sampling results for well #1134 (9N/6E-36G1, Arden-Cordova #3), 9/00-3/01, w/attchsCindy Caulk / Aerojet General CorpCharles Berrey / Environmental Protection Agency - Region 9041863281615-02275
2001/04/09Ltr: Comments on results of RI of perchlorate downgradient of GET DAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp041963431615-93447
2001/04/09Ltr: Response to comments on proposed plan for OU3 (western groundwater OU), w/enclCharles Berrey / Environmental Protection Agency - Region 9William Koskay / Bacalski, Byrne & Koska (attorneys)042063451615-93483
2001/04/13Ltr: GET E/F material modification proposal, w/attchCindy Caulk / Aerojet General CorpCharles Berrey / Environmental Protection Agency - Region 9042163471615-93456
2001/04/16Ltr: Response to agency comments, 2/28/01, exhibit 4-3 NDMA analytical methods evaluation rpt, w/enclCindy Caulk / Aerojet General CorpCharles Berrey / Environmental Protection Agency - Region 9042263541615-93450
2001/04/18Ltr: American States Water Co & Southern Calif Water Co v CA & Aerojet, alternative water supplyWilliam Koska / Bacalski, Byrne & Koska (attorneys)Thelma Estrada / Environmental Protection Agency - Region 9042363601615-93487
2001/04/25Ltr: Withdraw request for alternative water supply for Rancho Cordova, w/attchAnthony Pescetti / CA Assembly - Office of Anthony PescettiCharles Berrey / Environmental Protection Agency - Region 9042463651615-93486
2001/04/26Ltr: GET E/F material modification proposalAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp042563681615-93463
2001/04/30Ltr: Comments of American States, Southern CA Water Co (SCWC) & American States Water (AWR) to proposed ROD, w/enclsWilliam Koska / Bacalski, Byrne & Koska (attorneys)Charles Berrey / Environmental Protection Agency - Region 9042663711615-02390
2001/05/02Agenda package, proposed cleanup & abatement order, alternate water supply contingency plan, western groundwater OU, w/TL to C Conley fr A MacDonaldCA Regional Water Quality Control Board - Central Valley RegionAerojet General Corp042763861615-02360
2001/05/02Ltrs: Monthly sampling results for well #2066 (Arden Cordova well #21), 3/01-4/01, w/attchsCindy Caulk / Aerojet General CorpCharles Berrey / Environmental Protection Agency - Region 9042864091615-02372
2001/05/04NDMA detection level, w/TL to C Berrey fr K Brown 5/15/01Environmental Protection Agency - Superfund Technical Support Center for Monitoring & Site CharacterEnvironmental Protection Agency - Region 9042964191615-93435
2001/05/08Ltr: Comments on 2001-02 groundwater monitoring plan exhibit 4, public & private supply wells, & exhibit 6 monitoring wells for zones 1-4Alexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp043064241615-93458
2001/05/08Ltr: Results of samples collected 4/11/01 fr Arden-Cordova Water Service wells for perchlorate & NDMA analysisAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp043164291615-93493
2001/05/09Ltr: Upcoming ROD/consent decree & Tulare Lake Basin Water Storage District v US, w/enclWilliam Koska / Bacalski, Byrne & Koska (attorneys)Charles Berrey / Environmental Protection Agency - Region 9043264311615-02391
2001/05/09Ltr: Additional comment on 2001-02 groundwater monitoring plan exhibit 4, public & private supply wells, & exhibit 6 monitoring wells for zones 1-4Alexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp043364531615-93459
2001/05/11Ltr: Response to comments on results of RI of perchlorate downgradient of GET D, well #2066Cindy Caulk / Aerojet General CorpAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley Region043464551615-93460
2001/05/14TLs(29): Groundwater data (GIS/Key database on compact disc) for discs copied 12/98-7/00 & 9/00-5/01Cindy Caulk / Aerojet General CorpCharles Berrey / Environmental Protection Agency - Region 9043564571615-01946
2001/05/15Ltr: Comments on workplan for in-situ oxidation pilot system at line 04, site 30FAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp043664871615-93462
2001/05/21TL: Revision to final site assessment rpt for candidate carve-out landsCindy Caulk / Aerojet General CorpCharles Berrey / Environmental Protection Agency - Region 9043764901615-93466
2001/05/31Ltr: Approval of workplan for in-situ oxidation pilot system at line 04, site 30FCharles Berrey / Environmental Protection Agency - Region 9Cindy Caulk / Aerojet General Corp043864921615-93465
2001/05/31Ltr: Exhibit 4-3 NDMA analytical methods evaluation rpt (AMER)Cindy Caulk / Aerojet General CorpCharles Berrey / Environmental Protection Agency - Region 9043964941615-93494
2001/06/01Ltr: American States Water Co - counters Aerojet claim that production of groundwater constitutes a property right, w/attchScott Slater / Hatch & Parent (attorneys)Charles Berrey / Environmental Protection Agency - Region 9044064971615-93495
2001/06/06Ltr: Results of samples collected 5/9/01 fr Arden-Cordova Water Service wells for perchlorate & NDMA analysisAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp044165021615-93496
2001/06/07Ltr: Response to agency comments re GET E/F material modification proposal, w/encls 1-5Cindy Caulk / Aerojet General CorpCharles Berrey / Environmental Protection Agency - Region 9044265041615-02392
2001/06/07TL: Draft RODCharles Berrey / Environmental Protection Agency - Region 9Patricia Port / US Dept of the Interior044365691615-93385
2001/06/07TL: Draft RODCharles Berrey / Environmental Protection Agency - Region 9Robert Hight / CA Dept of Fish & Game044465711615-93386
2001/06/07TL: Draft RODCharles Berrey / Environmental Protection Agency - Region 9Edwin Lowry / CA Environmental Protection Agency - Dept of Toxic Substances Control044565731615-93387
2001/06/07TL: Draft RODCharles Berrey / Environmental Protection Agency - Region 9David Kennedy / National Oceanic & Atmospheric Administration - Office of Response & Restoration044665751615-93388
2001/06/07TL: Draft RODCharles Berrey / Environmental Protection Agency - Region 9Terry Harwood / US Dept of Agriculture - Hazardous Materials Management Group044765771615-93389
2001/06/14Ltr: ROD should address water supply shortages due to groundwater well contaminationRichard Pombo / US House of Representatives - Office of Richard PomboChristine Whitman / Environmental Protection Agency - Washington, D C044865791615-93497
2001/06/15Ltr: Potential use of Folsom S canal for discharge of treated groundwaterAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionTom Aiken / US Dept of the Interior - Bureau of Reclamation044965811615-93498
2001/07/05Ltr: Citizens Utilities Co of CA - Aerojet failed to create viable plan to replace water supply wells lost to contamination in CAO & contingency planNancy Casale / Cooper, White & Cooper (Attorneys)Gary Carlton / CA Regional Water Quality Control Board - Central Valley Region045065841615-02393
2001/07/09Ltr: Comments on draft ROD for western groundwater OUAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCharles Berrey / Environmental Protection Agency - Region 9045165911615-93499
2001/07/10Ltr: Response to comments re final 2001-02 gw monitoring plan exhibit 4, public & private supply wells, & exhibit 6, monitoring wells for zones 1-4Alexander MacDonald / CA Regional Water Quality Control Board - Central Valley RegionCindy Caulk / Aerojet General Corp045265971615-93502
2001/07/14Web Page: Pollutant in water goes unregulatedChris Bowman / Sacramento Bee-045366001615-93503
2001/07/16Ltr: Arden-Cordova receipt of Aerojet GET water from Folsom S CanalDonald Saddoris / Southern California Water CoAlexander MacDonald / CA Regional Water Quality Control Board - Central Valley Region045466051615-93504
2001/07/17Ltr: Proposed cleanup & abatement order, alternative water supply contingency planGary Carlton / CA Regional Water Quality Control Board - Central Valley RegionDonald Saddoris / Southern California Water Co045566101615-93505
2001/07/19TL: ROD for western groundwater OU (OU3)Charles Berrey / Environmental Protection Agency - Region 9Keith Takata / Environmental Protection Agency - Region 9045666141615-93500
2001/07/20Record 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 483Keith Takata / Environmental Protection Agency - Region 9-045766171615-02394
2001/07/20Record of decision (ROD) for western groundwater OU (OU3) cover page (concurrence copy)Environmental Protection Agency - Region 9-045868501615-93501

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