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Pacific Southwest, Region 9: Superfund

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

Sulphur Bank Mercury Mine

Superfund Site

Removal Action

Administrative Record Index

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

The documents contained in this administrative record have been considered by the U.S. Environmental Protection Agency in identifying appropriate removal activities for Sulphur Bank Mercury Mine Superfund Site in Lake County, CA.

The documents are listed in the index in ascending chronological order, which is consistent with the arrangement of documents in the administrative record.

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 23 in this administrative record. Copies of the guidance documents are contained in the Compendium of CERCLA Response Selection Guidance Documents located in the Region 9 Superfund Records Center.

Gary Riley
Remedial Project Manager
U.S. EPA (SFD-7-2)
75 Hawthorne Street
San Francisco, CA 94105-3972
(415) 972-3003
riley.garry@epa.gov
or:Jeannie Wong
Environmental Protection Assistant
U.S. EPA (SFD-9)
75 Hawthorne Street
San Francisco, CA 94105-3972
(415) 972-3079 or (800) 231-3075
wong.jeannie@epa.gov

List of Abbreviations and Acronyms Used in Administrative Record Index

ABBREVIATIONMEANING
attchAttachment
CERCLAComprehensive Environmental Response, Compensation, and Liability Act of 1980 (Superfund)
EE/CAEngineering Evaluation/Cost Analysis
enclEnclosure
EPAEnvironmental Protection Agency
frFrom
LtrLetter
MemoMemorandum
mgtmanagement
reRegarding
RI/FSRemedial Investigation/Feasibility Study
rptReport
TLTransmittal Letter
w/With
w/oWithout

Administrative Record Index

Doc DateAuthor / Author Org.Addressee / Addressee Org.Title / SubjectDoc ID
8/1/1994Environmental Protection Agency - Region 9 -RI/FS rpt88124352
11/6/1995Carl Larson / Lake County - Board of SupervisorsKeith Takata / Environmental Protection Agency - Region 9Ltr: Potential spillage into Clear Lake fr Herman Pit88125176
11/14/1995Frank Riggs / US House of RepresentativesKeith Takata / Environmental Protection Agency - Region 9Ltr: Transmits ltr received fr Carl Larson re need for timely response to threats of spill into Clear Lake fr Herman Pit, w/o attch88125174
12/11/1995Felicia Marcus / Environmental Protection Agency - Region 9Frank Riggs / US House of RepresentativesLtr: Response to 11/14/95 ltr re spill potential fr Herman Pit, w/ltr of 11/16/95 to C Larson fr K Takata88125177
3/6/1996Christopher Weden / Environmental Protection Agency - Region 9Keith Takata / Environmental Protection Agency - Region 9Action memo: Request & document approval of proposed removal action88124487
4/10/1996Bob Reynolds / Lake County Air Quality Management DistrictCarolyn d'Almeida / Environmental Protection Agency - Region 9Memo: Water samples taken 3/7/96 during Herman Pit overflow, w/encls & marginalia88125178
9/1/1996Environmental Protection Agency - Region 9 -Fact sheet: Site update88125272
10/25/1997Jim Shock / Lake County Record-Bee (Newspaper) -Newsclip: Grand jury tours Elem colony, Sulphur Bank Mine88125427
10/29/1997Joanne Flanagan / Clear Lake Observer -Newsclip: Toxic Sulphur Bank mine study, Grand Jury investigates abandoned mercury mine, seeking cleanup plan (Elem Indian Colony)88125425
11/20/1997Bob Reynolds / Lake County Air Quality Management DistrictCarolyn d'Almeida / Environmental Protection Agency - Region 9Memo: Comments re directing Herman Pit overflow via pipe to lake - transmits excerpt of interim final rpt re floc w/attch88125403
1/14/1998Carolyn d'Almeida / Environmental Protection Agency - Region 9Keith Takata / Environmental Protection Agency - Region 9Action Memo: Amendment 5, El Nino winterization to extend SOW for removal activities to minimize impact of winter storms w/attch88124465
1/26/1998Bob Reynolds / Lake County Air Quality Management DistrictCarolyn d'Almeida / Environmental Protection Agency - Region 9Ltr: Followup on water analysis samples & comments on remedial plans, w/data sheets for Clear Lake, Green Pond, & Herman Pit88125404
2/17/1998Lake County - Board of Supervisors -Urgency ordinance amending sect 9-3 of Lake County code permitting release of water fr mine into Clear Lake, w/TL to C d'Almeida 3/5/9888125406
2/20/1998Joanne Flanagan / Clear Lake Observer -Newsclip: Mercury pit (Herman Impound) overflows into lake88125405
4/10/1998Carl Larson / Lake County - Board of SupervisorsCarolyn d'Almeida / Environmental Protection Agency - Region 9Ltr: Water mgt re pumping, redirection & diversion (followup to 4/6/98 mtg)88125558
5/6/1998Battelle Pacific Northwest LaboratoriesEnvironmental Protection Agency - Region 9Final data rpts for site & flood event samples analyzed for mercury & conventionals, submitted 2/98, w/TL to C d'Almeida fr B Lasorsa88124826
5/12/1998Carl Larson / Lake County - Board of SupervisorsLake County - Board of SupervisorsMemo: Discussion & site visit on 3/16/98 to evaluate feasibility of combining flood repair, site protection & ecological improvements, w/TL to C d'Almeida fr C Larson 5/14/9888124823
5/18/1998Carolyn d'Almeida / Environmental Protection Agency - Region 9Carl Larson / Lake County - Board of SupervisorsLtr: Response to 4/10/98 ltr re water mgt at Clear Lake & surrounding area88125559
8/12/1998Carl Larson / Lake County - Board of SupervisorsCarolyn d'Almeida / Environmental Protection Agency - Region 9Ltr: Water diversion, geothermal wells & mercury transport at site88125568
1/1/1999Ellen Manges / Environmental Protection Agency - Region 9 -Superfund response action priority form re proposed removal action at site88124838
8/13/1999Harding Lawson AssocEnvironmental Protection Agency - Region 9
US Army Corps of Engineers - Sacramento District
Engineering evaluation/cost analysis (EE/CA) - surface water diversion removal action (draft final) w/attchs88124836
8/16/1999Environmental Protection Agency - Region 9 -Memo: Communication plan for engineering evaluation/cost analysis (EE/CA) rpt w/appendices88124837
8/17/1999 - -Compendium of CERCLA response selection guidance documents for site - surface water control removal action88125572
8/18/1999Environmental Protection Agency - Region 9Lake County Record-Bee (Newspaper)Public Notice: EPA seeking comments on rpt & proposed activities (surface water diversions) at site88125569
8/18/1999Ellen Manges / Environmental Protection Agency - Region 9File / NONEMemo: Basis for surface water control removal action88125571

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