Phase 3 Chemical Data Gap Sampling Investigation
DOE and DTSC have been in the field working on Phase 3 Chemical Data Gap Investigation for Area IV and the NBZ of the SSFL. Like during the co-located sampling effort several documents have been prepared by CDM, DOE's contractor and approved by DTSC. Those documents and approvals can be found on this page.
June 2015
July 2014
DTSC approves Department of Energy's request to defer implementing the 6 soil vapor probe locations in Subarea 5A and 3 Test/Pit Trenching locations in Subarea 5D until remedial phase due to bird nesting identified by the site biologist.
May 2014
DTSC approves Addendum No. 11 to Master Field Sampling Plan for Chemical Data Gap Investigation, Phase 3 Go-Back Soil Chemical Sampling at Area IV, Subareas 5A, 5D, 8, and the Northern Buffer Zone (CDM Smith, 4/2014). Addendum No. 11 supports implementation of the soil sampling program described in the "Work Plan for Chemical Data Gap Investigation, Phase 3 Soil Chemical Sampling at Area IV, Santa Susana Field Laboratory, Ventura County, California" (4/2012). Also see Attachment 1 Final Phase 3 Data Gap Analysis for Subareas 5A, 5D, 8 and the Northern Buffer Zone Technical Memorandum, Santa Susana Field Laboratory, Ventura County (MWH, 2014).
April 2014
DTSC approves addendum No. 20 Final Soil Vapor SOP to the Master Field Sampling Plan for Chemical Data Gap Investigation, Phase 3 Chemical Sampling at Area IV. Addendum No. 20 describes recommended soil vapor surveying procedures for use on the Department of Energy (DOE)‐administered property at the Santa Susana Field Laboratory (SSFL). DOE will use this SOP for the collection of soil vapor data that will be used to address data gaps identified during the data gap analysis performed as part of the Phase 3 chemical characterization. Also, please see Appendix A Advisory Active Soil Gas Investigation.
On April 22, 2014, the U.S. Department of Energy (DOE) along with the California Department of Toxic Substances Control (DTSC) hosted a public meeting to discuss Phase 3 Chemical Data Gap Sampling, Final Phase 3 Data Gaps Block 2 Go-Backs for Subareas 5A, 5D, 8, and the Northern Buffer Zone (NBZ) including GIS.
January 2014
DTSC approves Addendum No. 10 to the Master Field Sampling Plan for Chemical Data Gap Investigation, Phase 3 Go-Back Soil Chemical Sampling at Area IV for Subareas 5B, 5C and 3/6. Addendum No. 10 includes the data gap analysis and proposed sampling locations and objectives for each sample.
November 2013
DTSC approves Addendum No. 9 to the Master Field Sampling Plan For Chemical Data Gap Investigation, Phase 3 Chemical Sampling at Area IV for the Northern Buffer Zone. This addendum includes the data gap sampling analysis and the proposed sampling locations and objective for each sample.
DTSC approves Phase 3 Subarea 5A North Implementation Plan. The Implementation Plan supplements the Subarea 5A Data Gap Analysis Technical Memorandum that was submitted as Attachment 1 in Addendum No. 4 to the Master Field Sampling Plan to Chemical Data Gap Investigation, Phase 3 Soil Chemical Sampling at Area IV and was approved by DTSC in September 2012.
October 2013
On October 29, 2013, the U.S. Department of Energy (DOE) along with the California Department of Toxic Substances Control (DTSC) hosted a public meeting to discuss proposed sampling locations for the Northern Buffer Zone, go-backs data gap criteria and proposed go-back samples.
August 2013
DTSC approves revised Addendum No. 7 to the Chemical Data Gap Investigation Work Plan. Addendum No. 7 includes the data gap analysis and the proposed sampling locations and objectives for Subarea 8.
DTSC approves Addendum No. 8 to the Chemical Data Gap Investigation Work Plan. Addendum No. 8 includes the data gap analysis and the proposed sampling locations and objectives for Subarea 5D.
On August 6, 2013, the U.S. Department of Energy (DOE) along with the California Department of Toxic Substances Control (DTSC) hosted a public meeting to discuss proposed sampling locations for Subarea 5D . This subarea is the next area where DOE will be performing data gap chemical sampling.
July 2013
June 2013
DTSC approve Addendum No. 7 to the Chemical Data Gap Investigation Work Plan. Addendum No. 7 includes the data gap analysis and the proposed sampling locations and objectives for Subarea 8 (revised August 2013).
On June 11, 2013, the U.S. Department of Energy (DOE) along with the California Department of Toxic Substances Control (DTSC) hosted a public meeting to discuss proposed sampling locations for Historical Site Assessment (HSA) subarea 8. This subarea is the next area where DOE will be performing data gap chemical sampling.
April 2013
DTSC approves Addendum No. 6 to the Chemical Data Gap Investigation Work Plan. Addendum No. 6 includes the data gap analysis and the proposed sampling locations and objectives for Subarea 7.
February 2013
January 2013
DTSC has approved the updated Standard Operating Procedures (SOPs) for the Phase 3 Chemical Sampling. A list of all the SOPs can be found below.
November 2012
DTSC approves Addendum No. 5 to the Chemical Data Gap Investigation Work Plan. Addendum No. 5 includes the data gap analysis and the proposed sampling locations and objectives for Subareas 3 and 6.
August 2012
On August 9, 2012, the U.S. Department of Energy (DOE) along with the California Department of Toxic Substances Control (DTSC) hosted a public meeting to discuss proposed sampling locations for Historical Site Assessment (HSA) subarea 5A. This subarea is the next area where DOE will be performing data gap chemical sampling.
July 2012
DOE presents an overview of drainage sediment sampling in Area III. Sampling is expected to take place in July.
DTSC approves the Standard Operating Procedure (SOP) No. 19 for the sediment sampling at standing water sample locations.
June 2012
The Phase 3 Soil Chemical Sampling at Area IV of the Santa Susana Field Laboratory (SSFL) addresses the methodologies being implemented to complete the Phase 3 Chemical Data Gap Investigation for Area IV and the NBZ of the SSFL.
April 2012
DTSC Approves Phase 3 Work Plan for Chemical Data Gap Investigation
The Phase 3 Soil Chemical Sampling at Area IV of the Santa Susana Field Laboratory (SSFL) addresses the methodologies being implemented to complete the Phase 3 Chemical Data Gap Investigation for Area IV and the NBZ of the SSFL.
Phase 1 Sampling Results
Added March 30, 2011:
Added May 11, 2011:
Added June 16, 2011:
Added June 20, 2011:
Added June 21, 2011:
Added July 11, 2011:
Added July 27, 2011:
Added August 19, 2011:
Added September 26, 2011:
Added October 26, 2011:
Added January 2012:
- Addendum No.7 to the Master Field Sampling
Addendum No. 7 to the Master Field Sampling Plan describes the subsurface sampling as a part of Phase 1 of the co-located soil sampling with EPA. This addendum has been approved by DTSC.
- SRE Tarp Split Sampling Procedures
As a part of the Chemical Co-located Sampling Program samples were collected in the SRE tarp area within Subarea 6.
- DTSC Approves DOE's Interim Screening Levels (ISLs)
Interim Screening Levels will allow review and screening of data, identifying data gaps, and planning for Phase 2/3 of chemical sampling.
Added April 17, 2012:
- DTSC approved Addendum No. 1 to the Chemical Data Gap Investigation Work Plan, Phase 3 Soil Chemical Sampling at Area IV. This addendum describes the unique characteristics of HSA 5C, includes detailed sampling rationale and maps, and includes documentation of the data gap analysis conducted for HSA 5C.
Meetings and Supporting Materials for Co-Located Samples:
DTSC/DOE Meeting on Chemical Co-located Sampling Decisions HSA 8N, March 25, 2011
- Presentation: Co-Located Chemical Sampling Needs for HAS-8 North, presented by Mark Malinowski, DTSC and Stephanie Jennings, DOE.
- Draft SHA 8-North Sampling Location Table. This table identifies each EPA sampling location and their rationale for sampling. It also includes a column that describes the suite (primary, secondary, or additional analytes) that proposed for each co-located sampling location. EPA sample locations that they are sampling that have been de-selected for chemical co-located samples following the discretionary criteria discussed between the agencies, are noted by the strikeout function on the table.
- Figure 1: HSA 8-North Sample Locations. This figure that contains all sampling locations for HSA 8 North. This was used as a reference figure during the meeting.
- HSA5C Surface Soil Chemical Distribution Table
- HSA5C Subsurface Soil Chemical Distribution Table