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Pacific Southwest, Region 9: Superfund

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

Lava Cap Mine

Superfund Site

Groundwater OU (OU 2)

Administrative Record Index

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

This administrative record file contains the documents that the U.S. Environmental Protection Agency (EPA) is currently using to identify appropriate remedial activities for the Lava Cap Mine Superfund site, Groundwater Operable Unit (OU-02) in Nevada County, California. It is presented in compact disc (CD) format. The administrative record file will be supplemented periodically; it will be complete after public comments on EPA's Proposed Plan, EPA's response to comments, and the Record of Decision (ROD) are included.

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

Rusty Harris-Bishop
Remedial Project Manager
U.S. EPA (SFD-7-2)
75 Hawthorne Street
San Francisco, CA 94105-3972
(415) 972-3140
harris-bishop.rusty@epa.gov
or:David Cooper
Community Involvement Coordinator
U.S. EPA (SFD-3)
75 Hawthorne Street
San Francisco, CA 94105-3972
(415) 972-3245 or (800) 231-3075
cooper.david@epa.gov


List of Abbreviations and Acronyms Used in Administrative Record Index

ABBREVIATIONMEANING
appAppendix
ARAR Applicable or Relevant and Appropriate Restriction (or Requirement)
Attch(s) Attachment(s)
CTR California Toxics Rule
CH2MHillContractor
doc Document
DTSCDept of Toxic Substances Control (California Environmental Protection Agency)
fr From
FS Feasibility Study
ltr Letter
memo Memorandum
OU Operable Unit
re Regarding
RI Remedial Investigation
RI/FSRemedial Investigation/Feasibility Study
rpt Report
TL Transmittal Letter
vVolume
w/ With

Administrative Record Index

Doc_dateAuthorAddresseeTitle_subjectDocid
9/1/1999C H 2 M Hill, IncEnvironmental Protection Agency - Region 9Field sampling plan for RI/FS88217754
9/1/1999C H 2 M Hill, IncEnvironmental Protection Agency - Region 9Quality assurance project plan for RI/FS88217761
9/1/1999Environmental Protection Agency - Region 9-Community involvement plan88217813
5/3/2001US Dept of Health & Human Services - Agency for Toxic Substances & Disease Registry-Public health assessment, evaluation of off-site contamination140288
5/4/2001David Seter / Environmental Protection Agency - Region 9Steven Ross / CA Environmental Protection Agency - Dept of Toxic Substances ControlLtr: Request for ARARs88217881
7/2/2001Steven Ross / CA Environmental Protection Agency - Dept of Toxic Substances ControlDavid Seter / Environmental Protection Agency - Region 9Ltr: Transmits initial DTSC review comments on draft human health risk assessment rpt, w/attch117514
8/22/2001Darrel Lauren / CA Environmental Protection Agency - Dept of Toxic Substances ControlSteven Ross / CA Environmental Protection Agency - Dept of Toxic Substances ControlMemo: Baseline ecological risk assessment & review of final draft ecological risk assessment, w/marginalia & attch117484
8/23/2001Karen DiBiasio / CA Environmental Protection Agency - Dept of Toxic Substances ControlSteven Ross / CA Environmental Protection Agency - Dept of Toxic Substances ControlMemo: State review comments on human health risk assessment (HHRA)117510
9/5/2001Steven Ross / CA Environmental Protection Agency - Dept of Toxic Substances ControlDavid Seter / Environmental Protection Agency - Region 9Memo: Transmits DTSC review comments on draft human health risk assessment (HHRA) & final draft ecological risk assessment rpts, w/attch117513
11/1/2001C H 2 M Hill, IncEnvironmental Protection Agency - Region 9Field monitoring rpt for RI/FS, field activities 8/01 - 11/01, w/apps A-1 & 2 (replacement pages) & attchs118826
11/1/2001C H 2 M Hill, IncEnvironmental Protection Agency - Region 9Field monitoring rpt, quarterly monitoring activities 8/02, w/apps A-1, A-2 & B & TL to D Seter fr D Towell 3/3/03138090
11/1/2001C H 2 M Hill, IncEnvironmental Protection Agency - Region 9RI rpt, public release draft, v1 of 2, rpt & Apps A-D, w/TL to D Seter fr D Towell 11/2/0188217823
11/1/2001C H 2 M Hill, IncEnvironmental Protection Agency - Region 9RI rpt, public release draft, v2 of 2, App E - human health risk assessment (HHRA) & App F - ecological risk assessment (ERA)88217824
3/19/2002Robert Busby / CA Regional Water Quality Control Board - Central Valley RegionSteven Ross / CA Environmental Protection Agency - Dept of Toxic Substances ControlMemo: Review of ARARs, w/attch2003227
9/30/2002C H 2 M Hill, IncEnvironmental Protection Agency - Region 9Field monitoring rpt, quarterly monitoring activities, 2/02 & 5/02, w/TL to D Seter fr D Towell 10/2/02122055
11/1/2002Environmental Protection Agency - Region 9-Fact Sheet: Arsenic in well water, what you should know140246
1/1/2003C H 2 M Hill, IncEnvironmental Protection Agency - Region 9Background approach & comparison of site water quality data to CTR criteria2003217
6/1/2003C H 2 M Hill, IncEnvironmental Protection Agency - Region 9Field monitoring rpt, quarterly monitoring activities 11/02, w/apps A-1, A-2 & B & TL to D Seter fr D Towell 6/7/03160134
2/5/2004Environmental Protection Agency - Region 9-List of US EPA guidance documents consulted during development & selection of response action for site2006457
12/12/2007James Rohrer / CA Environmental Protection Agency - Dept of Toxic Substances ControlSteven Ross / CA Environmental Protection Agency - Dept of Toxic Substances ControlMemo: Draft comments & recommendations on agency review draft, RI rpt for OU 2 dated 11/20071111727
12/12/2007James Rohrer / CA Environmental Protection Agency - Dept of Toxic Substances ControlSteven Ross / CA Environmental Protection Agency - Dept of Toxic Substances ControlMemo: Comments & recommendations on agency review draft, RI rpt for OU 2 dated 11/20071111731
2/20/2008Jeff Huggins / CA Regional Water Quality Control Board - Central Valley RegionRusty Harris-Bishop / Environmental Protection Agency - Region 9Ltr: Comments on agency review draft, RI rpt for OU 2 (groundwater) received 11/8/20071111728
6/10/2008Jeff Huggins / CA Regional Water Quality Control Board - Central Valley RegionRusty Harris-Bishop / Environmental Protection Agency - Region 9Ltr: Comments on agency review draft, FS rpt for OU 2 (groundwater) dated 5/2008 (unsigned)1111730
6/13/2008Steven Ross / CA Environmental Protection Agency - Dept of Toxic Substances ControlRusty Harris-Bishop / Environmental Protection Agency - Region 9Ltr: Comments on agency review draft, FS rpt for OU 2 (groundwater), w/attch1111726
6/17/2008John Lindquist / C H 2 M Hill, Inc
David Towell / C H 2 M Hill, Inc
Nathan Brown / C H 2 M Hill, Inc
James Rohrer / CA Environmental Protection Agency - Dept of Toxic Substances Control
Steven Ross / CA Environmental Protection Agency - Dept of Toxic Substances Control
Memo: Response to comments fr J Rohrer on agency review draft, RI rpt for OU 2 (groundwater) received 12/12/20071111734
6/17/2008John Lindquist / C H 2 M Hill, Inc
Nathan Brown / C H 2 M Hill, Inc
David Towell / C H 2 M Hill, Inc
Jeff Huggins / CA Regional Water Quality Control Board - Central Valley RegionMemo: Response to comments fr J Huggins on agency review draft, RI rpt for OU 2 (groundwater) received 2/20/20081111735
6/26/2008Jeff Huggins / CA Regional Water Quality Control Board - Central Valley RegionRusty Harris-Bishop / Environmental Protection Agency - Region 9Ltr: Expresses concurrence on draft proposed groundwater/drinking water plan for OU2 (unsigned)1111729
7/1/2008C H 2 M Hill, IncEnvironmental Protection Agency - Region 9RI rpt, OU2 - appendix A2, summary of analytical results by analyte (public release draft)1111717
7/1/2008C H 2 M Hill, IncEnvironmental Protection Agency - Region 9RI rpt, OU2 - appendix B, field parameter data summary (public release draft)1111718
7/1/2008C H 2 M Hill, IncEnvironmental Protection Agency - Region 9RI rpt, OU2 - appendix F, sampling location info (public release draft)1111719
7/1/2008C H 2 M Hill, IncEnvironmental Protection Agency - Region 9RI rpt, OU2 - appendix I, data quality summary (public release draft)1111720
7/1/2008C H 2 M Hill, IncEnvironmental Protection Agency - Region 9RI rpt, OU2 - appendix A1, analytical data summary (public release draft)1111721
7/1/2008C H 2 M Hill, IncEnvironmental Protection Agency - Region 9RI rpt, OU2 - appendix D, soil boring logs (public release draft)1111722
7/1/2008C H 2 M Hill, IncEnvironmental Protection Agency - Region 9RI rpt, OU2 - appendix E, well construction diagrams (public release draft)1111723
7/1/2008C H 2 M Hill, IncEnvironmental Protection Agency - Region 9RI rpt, OU2, public release draft1111724
7/1/2008C H 2 M Hill, IncEnvironmental Protection Agency - Region 9FS rpt, OU2 (public release draft)1111725
7/1/2008Environmental Protection Agency - Region 9-Proposed plan - EPA requests comments on proposed groundwater/drinking water cleanup plan1111747
7/2/2008David Towell / C H 2 M Hill, Inc
John Lindquist / C H 2 M Hill, Inc
Steven Ross / CA Environmental Protection Agency - Dept of Toxic Substances ControlMemo: Response to DTSC comments on agency review draft, FS rpt for OU 2 (groundwater) dated 5/20081111733
7/15/2008Bill Gann / Nevada Irrigation DistrictRusty Harris-Bishop / Environmental Protection Agency - Region 9Ltr: Comments on doc re water availability1111732

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