[2022] [2021] [2020] [2019] [2018] [2017] [ 2016] [2015] [ 2014] [2013] [2012] [2011] [2010] [2009] [2008] [2007] [2006] [2005] [2004] [2003][2002][2001] [2000] [1999] [1998] [1997] [1996] [1995] [1994] [1993] |
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Date |
Correspondence Subject |
To |
From |
|
|
||
August 1, 2022 |
EPA |
Parsons |
|
May 9, 2022 |
EPA |
Parsons |
|
February 9, 2022 |
EPA |
Parsons |
|
January 7, 2022 |
EPA |
Parsons |
|
|
|
||
November 8, 2021 |
EPA |
Parsons |
|
August 4, 2021 |
EPA |
Parsons |
|
May 6, 2021 |
EPA |
Parsons |
|
February 8, 2021 |
EPA |
Parsons |
|
January 10, 2021 |
EPA |
CSSA |
|
|
|
||
November 9, 2020 |
EPA |
Parsons |
|
September 18, 2020 |
Approval of the RCRA Three-Tiered Long-Term Monitoring Network Optimization Evaluation |
CSSA |
EPA |
September 23, 2020 |
CSSA |
EPA | |
September 3, 2020 |
CSSA |
EPA | |
August 10, 2020 |
EPA |
Parsons |
|
May 5, 2020 |
EPA |
Parsons |
|
February 3, 2020 |
EPA |
Parsons |
|
January 9, 2020 |
EPA |
CSSA |
|
|
|
||
November 7, 2019 |
EPA |
Parsons |
|
August 8, 2019 |
EPA |
Parsons |
|
May 9, 2019 |
EPA |
Parsons |
|
February 4, 2019 |
EPA |
Parsons |
|
January 8, 2019 |
EPA |
Parsons |
|
|
|
||
November 5, 2018 |
EPA |
Parsons |
|
October 26, 2018 |
CSSA |
EPA |
|
October 25, 2018 |
EPA |
CSSA |
|
August 10, 2018 |
EPA |
Parsons |
|
May 9, 2018 |
EPA |
Parsons |
|
February 1, 2018 |
EPA |
Parsons |
|
January 5, 2018 |
CSSA |
EPA |
|
January 3, 2018 |
EPA |
CSSA |
|
|
|
||
November 2, 2017 |
EPA |
Parsons |
|
September 7, 2017 |
EPA |
CSSA |
|
August 2, 2017 |
EPA |
Parsons |
|
July 10, 2017 |
EPA |
CSSA |
|
May 2, 2017 |
EPA |
Parsons |
|
February 2, 2017 |
EPA |
Parsons |
|
January 13, 2017 |
EPA |
Parsons |
|
January 5, 2017 |
EPA |
CSSA |
|
|
|
||
November 2, 2016 |
EPA |
Parsons |
|
September 28, 2016 |
CSSA |
EPA |
|
August 16, 2016 |
EPA |
Parsons |
|
August 3, 2016 |
EPA |
Parsons |
|
July 6, 2016 |
EPA |
CSSA |
|
May 5, 2016 |
CSSA |
EPA |
|
May 3, 2016 |
EPA |
Parsons |
|
April 29, 2016 |
CSSA |
EPA |
|
January 11, 2016 |
Transmittal Letter for Three-Tiered Groundwater Long-Term Monitoring Optimization Evaluation |
EPA |
CSSA |
March 11, 2016 |
Approval of the RCRA Corrective Measures Implementation Program Plan |
CSSA |
EPA |
March 11, 2016 |
CSSA |
EPA |
|
|
|
||
November 24, 2015 |
EPA |
CSSA |
|
November 6, 2015 |
EPA |
Parsons |
|
November 5, 2015 |
EPA |
CSSA |
|
August 11, 2015 |
EPA |
Parsons |
|
July 1, 2015 |
EPA |
CSSA |
|
January 22, 2015 |
CSSA |
EPA |
|
January 5, 2015 |
EPA |
CSSA |
|
|
|
||
December 4, 2014 |
CSSA |
EPA |
|
November 11, 2014 |
EPA |
CSSA |
|
October 2, 2014 |
EPA |
CSSA |
|
August 14, 2014 |
EPA |
CSSA |
|
August 4, 2014 |
EPA |
CSSA |
|
July 25, 2014 |
CSSA |
EPA |
|
July 2, 2014 |
EPA |
Parsons |
|
May 1, 2014 |
EPA |
Parsons |
|
April 21, 2014 |
EPA |
Parsons |
|
February 14, 2014 |
Quarterly Groundwater Sampling Notification |
EPA |
Parsons |
|
|
||
August 7, 2013 |
Quarterly Groundwater Sampling Notification |
EPA |
Parsons |
July 10, 2013 |
EPA |
Parsons |
|
May 14, 2013 |
Quarterly Groundwater Sampling Notification |
EPA |
Parsons |
February 7, 2013 |
Quarterly Groundwater Sampling Notification |
EPA |
Parsons |
January 10, 2013 |
EPA |
Parsons |
|
|
|
||
August 3, 2012 |
EPA |
Parsons |
|
July 10, 2012 |
EPA |
Parsons |
|
May 2, 2012 |
EPA |
Parsons |
|
February 29, 2012 |
CSSA |
EPA |
|
February 13, 2012 |
EPA |
CSSA |
|
January 3, 2012 |
EPA |
Parsons |
|
|
|
||
August 3, 2012 |
EPA |
Parsons |
|
November 1, 2011 |
EPA |
Parsons |
|
August 4, 2011 |
EPA |
Parsons |
|
June 30, 2011 |
EPA |
CSSA |
|
April 27, 2011 |
EPA |
Parsons |
|
February 16, 2011 |
Approval of the Three-Tiered LTMO and DQOs for the Groundwater Monitoring Program |
CSSA |
EPA |
February 1, 2011 |
EPA |
Parsons |
|
January 10, 2011 |
EPA |
CSSA |
|
|
|
||
November 23, 2010 |
Three-Tiered Groundwater LTMO and Data Quality Objectives for the Groundwater Monitoring Program |
EPA |
Parsons |
November 1, 2010 |
EPA |
Parsons |
|
January 7, 2010 |
EPA |
CSSA |
|
|
|
||
July 2009 |
EPA |
CSSA |
|
January 9, 2010 |
EPA |
CSSA |
|
|
|
||
July 2008 |
EPA |
CSSA |
|
January 2008 |
EPA |
CSSA |
|
|
|
||
July 5, 2007 |
EPA |
CSSA |
|
|
|
||
May 1, 2006 |
EPA |
CSSA |
|
January 30, 2006 |
EPA |
CSSA |
|
|
|
||
November 4, 2005 |
EPA |
CSSA |
|
August 5, 2005 |
EPA |
CSSA |
|
May 2, 2005 |
EPA |
CSSA |
|
January 31, 2005 |
EPA |
CSSA |
|
|
|
||
August 6, 2004 |
TCEQ Request that EPA requires CSSA to submit a corrective action plan for long-term cleanup |
EPA |
TCEQ |
July 23, 2004 |
EPA |
CSSA |
|
February 18, 2004 |
Submittal of the Data Quality Objectives (revised November 2003) for review by EPA and TCEQ |
EPA |
CSSA |
February 6, 2004 |
EPA |
CSSA |
|
|
|
||
November 10, 2003 |
EPA |
CSSA |
|
August 11, 2003 |
EPA |
CSSA |
|
May 13, 2003 |
EPA |
Parsons |
|
March 11, 2003 |
Proposed management of drilling fluids to be generated on private lands |
EPA |
Parsons |
February 10, 2003 |
EPA |
CSSA |
|
|
|
||
November 6, 2002 |
EPA |
CSSA |
|
October 17, 2002 |
CSSA |
EPA |
|
August 26, 2002 |
EPA |
Parsons |
|
August 14, 2002 |
Submittal of the August 2002 Environmental Encyclopedia update documents |
EPA |
Parsons |
August 1, 2002 |
EPA |
CSSA |
|
June 28, 2002 |
Submittal of Waste Management Plan for incorporation to 3008(h) Administrative Order |
EPA |
CSSA |
April 30, 2002 |
EPA |
CSSA |
|
April 22, 2002 |
Submittal of Data Quality Objectives for review by EPA and TNRCC regulators |
EPA |
CSSA |
|
|
||
December 31, 2001 |
EPA |
CSSA |
|
December 26, 2001 |
Submittal of June 2001 Quarterly Groundwater Monitoring Report |
EPA |
CSSA |
November 5, 2001 |
EPA |
CSSA |
|
September 20, 2001 |
EPA |
CSSA |
|
August 6, 2001 |
EPA |
CSSA |
|
August 1, 2001 |
EPA |
CSSA |
|
June 15, 2001 |
Use of Well 16 Groundwater for the PIMS Demonstration Site at CSSA |
CSSA |
EPA |
June 14, 2001 |
Submittal of September 5, 2000 minutes of TIM #4, under RL 74 |
EPA |
CSSA |
May 29, 2001 |
Environmental Encyclopedia Update, Phytoremediation Treatability Study Report |
EPA |
CSSA |
May 10, 2001 |
EPA |
CSSA |
|
April 5, 2001 |
EPA |
CSSA |
|
February 22, 2001 |
EPA |
CSSA |
|
February 15, 2001 |
EPA |
CSSA |
|
February 5, 2001 |
EPA |
CSSA |
|
|
|
||
December 5, 2000 |
Second and Third Quarterly Groundwater Monitoring Event Reports |
EPA |
CSSA |
August 15, 2000 |
CSSA |
EPA |
|
August 3, 2000 |
EPA |
CSSA |
|
July 11, 2000 |
CSSA |
EPA |
|
June 27, 2000 |
CSSA |
EPA |
|
June 27, 2000 |
EPA |
CSSA |
|
May 10, 2000 |
EPA |
CSSA |
|
April 18, 2000 |
EPA |
CSSA |
|
February 25, 2000 |
EPA |
Parsons ES |
|
January 12, 2000 |
CSSA |
EPA |
|
January 6, 2000 |
Conditional approval of RFI Work Plan, IM Work Plan, and CRP, and comments |
CSSA |
EPA |
January 5, 2000 |
EPA |
Parsons ES |
|
|
|
||
November 10, 1999 |
EPA |
CSSA/Parsons ES |
|
October 19, 1999 |
EPA |
Parsons ES |
|
October 13, 1999 |
EPA |
Parsons ES |
|
September 1, 1999 |
EPA |
CSSA/Parsons ES |
|
August 25, 1999 |
Notification of Investigation Activities: Groundwater Sampling |
EPA |
Parsons ES |
July 30, 1999 |
EPA |
Parsons ES |
|
July 12, 1999 |
Notification of Investigation Activities: Geophysical Surveys at AOCs 47, 48, 56, 58, and 61 |
EPA |
Parsons ES |
|
|
||
|
|
||
August 12, 1997 |
EPA |
Parsons ES |
|
January 23, 1997 |
Amendment to Project Plans for Remedial Investigation at B-20 |
EPA |
Parsons ES |
|
|
||
May 21, 1996 |
Submittal of Consent Decree and Consent Order |
CSSA |
EPA |
February 29, 1996 |
EPA |
Parsons ES |
|
February 7, 1996 |
Sampling Plan for Evaluation of Background Level in Soil Types |
EPA |
Parsons ES |
|
|
||
December 6, 1995 |
EPA |
Parsons ES |
|
December 1, 1995 |
EPA |
Parsons ES |
|
October 31, 1995 |
Plans of action for the former B-20 OB/OD unit closure and the groundwater evaluation |
EPA |
Parsons ES |
March 15, 1995 |
Approval of 2nd Time Extension for Revising B-20 Plan for Closure |
CSSA |
EPA |
February 1, 1995 |
Notification of UXO located during B-20 remedial investigation |
EPA |
CSSA |
February 1, 1995 |
Notification of additional non-invasive tasks for investigation at Well 16 |
EPA |
CSSA |
February 1, 1995 |
EPA |
CSSA |
|
February 1, 1995 |
EPA |
CSSA |
|
|
|
||
March 7, 1994 |
Request for Extension of time for revision to closure plan |
EPA |
CSSA |
January 13, 1994 |
Approval of request for a time extension for revision of the closure plan for the B-20 OB/OD unit |
CSSA |
EPA |
|
|
||
December 21, 1993 |
Approval of request for a time extension for revision of the closure plan for the B-20 OB/OD unit |
CSSA |
EPA |
November 8, 1993 |
Comments Regarding Partial Facility Closure for B-20 ( |
CSSA |
EPA |
November 3, 1993 |
Statistical Basis for Sampling, B-20 OB/OD |
CSSA |
EPA |
August 5, 1993 |
Nomination of independent audit firm to perform and environmental audit at CSSA |
EPA |
CSSA |
August 4, 1993 |
Answer re: RCRA Docket No. VI-310-H |
EPA |
CSSA |
June 30, 1993 |
Compliant, Compliance Order, and Notice of Opportunity Hearing |
CSSA |
EPA |
May 18, 1993 |
Comments to Sampling and Analysis Plan, Hydrogeologic Report and Work Plan for Groundwater Contamination (See Volume 6-2.2, Correspondence) |
CSSA |
EPA |