EPA Correspondence

CORRESPONDENCE -- ENVIRONMENTAL PROTECTION AGENCY

[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]
Date	Correspondence Subject	To	From
2022
August 1, 2022	Quarterly Groundwater Monitoring Report Notification	EPA	Parsons
May 9, 2022	Quarterly Groundwater Monitoring Report Notification	EPA	Parsons
February 9, 2022	Quarterly Groundwater Monitoring Report Notification	EPA	Parsons
January 7, 2022	Period 55 Progress Report	EPA	Parsons
2021
November 8, 2021	Quarterly Groundwater Monitoring Report Notification	EPA	Parsons
August 4, 2021	Quarterly Groundwater Monitoring Report Notification	EPA	Parsons
May 6, 2021	Quarterly Groundwater Monitoring Report Notification	EPA	Parsons
February 8, 2021	Quarterly Groundwater Monitoring Report Notification	EPA	Parsons
January 10, 2021	Period 54 Progress Report Submission	EPA	CSSA
2020
November 9, 2020	Quarterly Groundwater Monitoring Report Notification	EPA	Parsons
September 18, 2020	Approval of the RCRA Three-Tiered Long-Term Monitoring Network Optimization Evaluation	CSSA	EPA
September 23, 2020	EPA Approval of the 2020 Revised DQOs	CSSA	EPA
September 3, 2020	CSSA Approval Letter for First Five Year Review	CSSA	EPA
August 10, 2020	Quarterly Groundwater Monitoring Notification	EPA	Parsons
May 5, 2020	Quarterly Groundwater Monitoring Report Notification	EPA	Parsons
February 3, 2020	Quarterly Groundwater Monitoring Report Notification	EPA	Parsons
January 9, 2020	Period 53 Progress Report	EPA	CSSA
2019
November 7, 2019	Quarterly Groundwater Monitoring Report Notification	EPA	Parsons
August 8, 2019	Quarterly Groundwater Monitoring Report Notification	EPA	Parsons
May 9, 2019	Quarterly Groundwater Monitoring Report Notification	EPA	Parsons
February 4, 2019	Quarterly Groundwater Monitoring Report Notification	EPA	Parsons
January 8, 2019	Period 52 Progress Report	EPA	Parsons
2018
November 5, 2018	Quarterly Groundwater Monitoring Report Notification	EPA	Parsons
October 26, 2018	Approval of Revised Community Relations Plan	CSSA	EPA
October 25, 2018	Community Relations Plan - 2018 Update	EPA	CSSA
August 10, 2018	Quarterly Groundwater Monitoring Report Notification	EPA	Parsons
May 9, 2018	Quarterly Groundwater Monitoring Report Notification	EPA	Parsons
February 1, 2018	Quarterly Groundwater Monitoring Report Notification	EPA	Parsons
January 5, 2018	Approval of the RCRA CMI Report	CSSA	EPA
January 3, 2018	Submission of the Period 51 Progress Report	EPA	CSSA
2017
November 2, 2017	Quarterly Groundwater Monitoring Report Notification	EPA	Parsons
September 7, 2017	Submission of the Corrective Measures Implementation Report	EPA	CSSA
August 2, 2017	Quarterly Groundwater Monitoring Report Notification	EPA	Parsons
July 10, 2017	Submission of the Period 50 Progress Report	EPA	CSSA
May 2, 2017	Quarterly Groundwater Monitoring Report Notification	EPA	Parsons
February 2, 2017	Quarterly Groundwater Monitoring Report Notification	EPA	Parsons
January 13, 2017	PFAS Sampling Results	EPA	Parsons
January 5, 2017	Submission of the Period 49 Progress Report	EPA	CSSA
2016
November 2, 2016	Quarterly Groundwater Monitoring Report Notification	EPA	Parsons
September 28, 2016	Approval of the 2016 Construction Quality Assurance Plan	CSSA	EPA
August 16, 2016	Submission of Construction Quality Assurance Plan	EPA	Parsons
August 3, 2016	Quarterly Groundwater Monitoring Report Notification	EPA	Parsons
July 6, 2016	Submission of the Period 48 Progress Report	EPA	CSSA
May 5, 2016	EPA Approval of the 2016 DQO's/Metals Evaluation	CSSA	EPA
May 3, 2016	Quarterly Groundwater Monitoring Report Notification	EPA	Parsons
April 29, 2016	EPA Approval of the 2016 LTMO Evaluation	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	Approval of the RCRA Corrective Measures Design Report	CSSA	EPA
2015
November 24, 2015	Corrective Measures Design (CMD) Report	EPA	CSSA
November 6, 2015	Quarterly Groundwater Monitoring Report Notification	EPA	Parsons
November 5, 2015	Corrective Measures Implementation Program Plan	EPA	CSSA
August 11, 2015	Quarterly Groundwater Sampling Notification	EPA	Parsons
July 1, 2015	Submittal of the Period 46 Progress Report	EPA	CSSA
January 22, 2015	Approval of the RCRA Corrective Measures Study Report	CSSA	EPA
January 5, 2015	Transmittal Letter for Period 45 Progress Report	EPA	CSSA
2014
December 4, 2014	Approval of the Final RCRA Facility Investigation Report	CSSA	EPA
November 11, 2014	Quarterly Groundwater Sampling Notification	EPA	CSSA
October 2, 2014	Corrective Measures Study Report	EPA	CSSA
August 14, 2014	Submission of the RCRA Facility Investigation (RFI) Report	EPA	CSSA
August 4, 2014	Quarterly Groundwater Sampling Notification	EPA	CSSA
July 25, 2014	Approval of the CSSA RFI Workplan	CSSA	EPA
July 2, 2014	Submittal of the Period 44 Progress Report	EPA	Parsons
May 1, 2014	Quarterly Groundwater Sampling Notification	EPA	Parsons
April 21, 2014	EPA Approval of the Baseline Risk Assessment	EPA	Parsons
February 14, 2014	Quarterly Groundwater Sampling Notification	EPA	Parsons
2013
August 7, 2013	Quarterly Groundwater Sampling Notification	EPA	Parsons
July 10, 2013	Submittal of the Period 42 Progress Report	EPA	Parsons
May 14, 2013	Quarterly Groundwater Sampling Notification	EPA	Parsons
February 7, 2013	Quarterly Groundwater Sampling Notification	EPA	Parsons
January 10, 2013	Submittal of the Period 41 Progress Report	EPA	Parsons
2012
August 3, 2012	Quarterly Groundwater Sampling Notification	EPA	Parsons
July 10, 2012	Submittal of the Period 40 Progress Report	EPA	Parsons
May 2, 2012	Quarterly Groundwater Sampling Notification	EPA	Parsons
February 29, 2012	Memo regarding CSSA North Pasture Fencing	CSSA	EPA
February 13, 2012	Memo on Plume Map Development	EPA	CSSA
January 3, 2012	Submittal of the Period 39 Progress Report	EPA	Parsons
2011
August 3, 2012	Quarterly Groundwater Sampling Notification	EPA	Parsons
November 1, 2011	Quarterly Groundwater Sampling Notification	EPA	Parsons
August 4, 2011	Quarterly Groundwater Sampling Notification	EPA	Parsons
June 30, 2011	Submittal of the Period 38 Progress Report	EPA	CSSA
April 27, 2011	Notification of groundwater monitoring activities	EPA	Parsons
February 16, 2011	Approval of the Three-Tiered LTMO and DQOs for the Groundwater Monitoring Program	CSSA	EPA
February 1, 2011	Quarterly Groundwater Sampling Notification	EPA	Parsons
January 10, 2011	Submittal of the Period 37 Progress Report	EPA	CSSA
2010
November 23, 2010	Three-Tiered Groundwater LTMO and Data Quality Objectives for the Groundwater Monitoring Program	EPA	Parsons
November 1, 2010	December 2010 Quarterly Groundwater Sampling Notification	EPA	Parsons
January 7, 2010	Submittal of the Period 35 Progress Report	EPA	CSSA
2009
July 2009	Period 34 Progress Report	EPA	CSSA
January 9, 2010	Submittal of the Period 33 Progress Report	EPA	CSSA
2008
July 2008	Period 32 Progress Report	EPA	CSSA
January 2008	Period 31 Progress Report	EPA	CSSA
2007
July 5, 2007	Submittal of the Period 30 Progress Report	EPA	CSSA
2006
May 1, 2006	Submittal of the 28th Quarterly Progress Report	EPA	CSSA
January 30, 2006	Submittal of the Final Hydrogeologic Conceptual Site Model	EPA	CSSA
2005
November 4, 2005	Submittal of the 26th Quarterly Progress Report	EPA	CSSA
August 5, 2005	Submittal of the 25th Quarterly Progress Report	EPA	CSSA
May 2, 2005	Submittal of the 24th Quarterly Progress Report	EPA	CSSA
January 31, 2005	Submittal of the 23rd Quarterly Progress Report	EPA	CSSA
2004
August 6, 2004	TCEQ Request that EPA requires CSSA to submit a corrective action plan for long-term cleanup	EPA	TCEQ
July 23, 2004	Submittal of the 21st Quarterly Progress Report	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	Submittal of the 19th Quarterly Progress Report	EPA	CSSA
2003
November 10, 2003	Submittal of the 18th Quarterly Progress Report	EPA	CSSA
August 11, 2003	Submittal of the 17th Quarterly Progress Report	EPA	CSSA
May 13, 2003	Notification of soil sampling activities at CSSA	EPA	Parsons
March 11, 2003	Proposed management of drilling fluids to be generated on private lands	EPA	Parsons
February 10, 2003	Submittal of the 15th Quarterly Progress Report	EPA	CSSA
2002
November 6, 2002	Submittal of the 4th Quarterly Progress Report	EPA	CSSA
October 17, 2002	CSSA Order on Consent Deliverable Review	CSSA	EPA
August 26, 2002	Letter requesting approval to proceed in September 2002 under the provisions of the DQOs submitted April 22, 2002	EPA	Parsons
August 14, 2002	Submittal of the August 2002 Environmental Encyclopedia update documents	EPA	Parsons
August 1, 2002	Submittal of the 13th Quarterly Progress Report	EPA	CSSA
June 28, 2002	Submittal of Waste Management Plan for incorporation to 3008(h) Administrative Order	EPA	CSSA
April 30, 2002	Submittal of the 12th Quarterly Progress Report	EPA	CSSA
April 22, 2002	Submittal of Data Quality Objectives for review by EPA and TNRCC regulators	EPA	CSSA
2001
December 31, 2001	Environmental Encyclopedia Update to Include Revised Risk Assessment Technical Approach Document, Spill Prevention, Control and Countermeasures Plan, and Soil Vapor Extraction Test Report for SWMU B-3	EPA	CSSA
December 26, 2001	Submittal of June 2001 Quarterly Groundwater Monitoring Report	EPA	CSSA
November 5, 2001	Submittal of 10th Quarterly Progress Report	EPA	CSSA
September 20, 2001	Submittal of Final Water Well Survey Report	EPA	CSSA
August 6, 2001	Submittal of Final December 2000 and March 2001 Groundwater Monitoring Reports and Minutes from TIM #4 and TIM #5	EPA	CSSA
August 1, 2001	Submittal of the Ninth Quarterly Progress Report	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	Submittal of the Eighth Quarterly Progress Report	EPA	CSSA
April 5, 2001	Environmental Encyclopedia Update, Revisions 10 and 11	EPA	CSSA
February 22, 2001	Environmental Encyclopedia Update, Revision 9	EPA	CSSA
February 15, 2001	Environmental Encyclopedia Update, Revision 8	EPA	CSSA
February 5, 2001	Submittal of Seventh Quarterly Progress Report	EPA	CSSA
2000
December 5, 2000	Second and Third Quarterly Groundwater Monitoring Event Reports	EPA	CSSA
August 15, 2000	Comments regarding RL83 SAP	CSSA	EPA
August 3, 2000	Submittal of Fifth Quarter Progress Report, Risk Assessment Technical Approach, Cluster Well Work Plan, Building 40 Closure Plan, Soil Gas Survey Reports, and Volume 1 CD-ROM	EPA	CSSA
July 11, 2000	Authorization to proceed with IM at SWMU O-1	CSSA	EPA
June 27, 2000	Comment regarding CSSA well completion diagram	CSSA	EPA
June 27, 2000	Request for review of well completion design	EPA	CSSA
May 10, 2000	Submittal of Third and Fourth Quarterly Progress Report	EPA	CSSA
April 18, 2000	Third Quarter Progress Report	EPA	CSSA
February 25, 2000	Responses to EPA Comments	EPA	Parsons ES
January 12, 2000	Approval of Explosives Variances	CSSA	EPA
January 6, 2000	Conditional approval of RFI Work Plan, IM Work Plan, and CRP, and comments	CSSA	EPA
January 5, 2000	Submittal of RFI Rework Work Plan	EPA	Parsons ES
1999
November 10, 1999	Submittal of Second Quarterly Progress Report	EPA	CSSA/Parsons ES
October 19, 1999	Notification of Investigation Activities	EPA	Parsons ES
October 13, 1999	Request for approval of explosives analyses variances	EPA	Parsons ES
September 1, 1999	Submittal of RFI Work Plan, IM Work Plan, and CRP	EPA	CSSA/Parsons ES
August 25, 1999	Notification of Investigation Activities: Groundwater Sampling	EPA	Parsons ES
July 30, 1999	Submittal of Description of Current Conditions Report, Quarterly Progress Report, and Environmental Encyclopedia	EPA	Parsons ES
July 12, 1999	Notification of Investigation Activities: Geophysical Surveys at AOCs 47, 48, 56, 58, and 61	EPA	Parsons ES
1998
1997
August 12, 1997	NPDES Discharge monitoring report	EPA	Parsons ES
January 23, 1997	Amendment to Project Plans for Remedial Investigation at B-20	EPA	Parsons ES
1996
May 21, 1996	Submittal of Consent Decree and Consent Order	CSSA	EPA
February 29, 1996	Work Plan and Sample Analysis Plan For Closure of SWMUs	EPA	Parsons ES
February 7, 1996	Sampling Plan for Evaluation of Background Level in Soil Types	EPA	Parsons ES
1995
December 6, 1995	Amendment to Partial Facility Closure Plan, B-20	EPA	Parsons ES
December 1, 1995	Request for response to October 26, 1995 plans of actions for the groundwater evaluation and the B-20 closure project	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	UXO work at B-20	EPA	CSSA
February 1, 1995	Liquid Filled Ampoules At B-23	EPA	CSSA
1994
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
1993
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

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