... Begin forwarded message: From: Department of Toxic Substances Control Date: May 6, 2013, 3:25:28 PM PDT To:Message 1 of 1 , May 6View SourceBegin forwarded message:
Department of Toxic Substances Control
Santa Susana Field Laboratory
Monthly Status Report
April 2013This monthly update is to inform the community of the Santa Susana Field Laboratory (SSFL) investigation and cleanup activities under the California Department of Toxic Substances Control's (DTSC) oversight that occurred in April 2013, as well as activities that are anticipated in May 2013. An overview summary of The Boeing Company, United States Department of Energy (DOE) and NASA areas at SSFL is included at the end of this report.
Completed Within the Past 30 Days
Chemical Soil Background Study (Study)
DTSC's Study is complete. Data derived from the Study is being used by DTSC in developing the Look-Up
Table values for chemical constituents, as required under the Administrative Orders on Consent (AOCs).
California Environmental Quality Act (CEQA)
- DTSC continued developing the request for proposal to identify and select a CEQA contractor to develop the SSFL CEQA documents. DTSC expects to have the CEQA contractor selected in the summer 2013.
- A CEQA Initial Study and mitigated negative declaration was issued for the chemical in-situ chemical oxidation field test.
NASAIn August 2012, NASA completed the first phase of sample collection to complete soil and surficial media chemical characterization at the two SSFL areas under its administration. These areas include the 41-acre NASA portion of Area I (the former Liquid Oxygen (LOX) Plant) and the 409-acre Area II. The 1,700 soil samples collected during this nine month program have been analyzed and the resulting data is being validated and evaluated for assessment of the extent of remaining soil chemical data gaps.
- DTSC met with NASA to coordinate and plan upcoming sampling plans. The final phase of soil sample collection is expected to commence in late spring 2013. DTSC and NASA will hold community stakeholder technical meeting on the data gap sampling plans prior to the sampling.
DOEIn 2012, US Environmental Protection Agency (US EPA), in coordination with DTSC and DOE, completed sampling efforts to define the nature and extent of Area IV radiologic contamination. US EPA's round two sampling locations were based upon the validated sampling results they received from their Round 1 sampling. In coordination with DTSC, DOE continues to conduct Phase 3 Soil Chemical Data Gap Investigation sampling in subareas located throughout Area IV. A number of Phase 3 sampling locations will be completed when trenching and test pit sampling occurs after the rainy season, actual start date soon to be determined. The status of the Phase 3 soil chemical investigation sampling efforts is presented below.
Northern Buffer Zone (Phase 1 Co-Located and Phase 2 Random Co-Located):
- All of the Phase 1 & 2 analytical results have been received and data validation is completed. DTSC is awaiting the data to determine if Phase 3 Data Gap work is required.
Subarea 5B (Phase 3 Data Gap Investigation):
- Approximately 92 percent of the surface and subsurface soil boring sample locations have been completed.
- Six locations were not sampled due to their proximity to archaeological zones.
- Approximately 8 percent of sampling locations consist of trenches and test pits that will be completed after the rainy season.
- All of the analytical results have been received; however, data validation is in process.
Subarea 5C (Phase 3 Data Gap Investigation):
- Approximately 77 percent of surface and subsurface soil boring sample locations has been completed.
- The remaining 23 percent of sample locations consist of trenches and test pits that will be completed after the rainy season.
- All of the analytical results have been received and 100 percent of data validation has been completed.
Subareas 3 and 6 (Phase 3 Data Gap Investigation)
- 100 percent of surface and subsurface soil boring sampling locations has been completed.
- All analytical results have been received and fifty percent of the data has been validated.
Area III Drainage Sediment Sampling (Phase 3 Data Gap Investigation):
- All field work is now complete.
- All of the analytical results have been received and 100 percent of data validation has been completed.
Subarea 7 (Phase 3 Data Gap Investigation)
- Approximately 87 percent of surface and subsurface soil samples have been collected.
- Three soil boring locations will be delayed for sampling with a drill rig until late July/August, due to proximity and protection of nearby bird nesting activities.
- Six boring locations will be completed in future with direct push technology rig; actual start dates to be determined.
- Analytical results have not yet been received and data validation has not yet started.
Boeing owns Area I, with the exception of the ~41 acre former liquid oxygen plant area, administered by NASA, and all of Areas Ill and IV. Areas I and Ill total 791 acres and are operated by Boeing. Boeing also owns the approximately 1,143 acre southern buffer zone and 182 acre northern buffer zone. Soils in Area IV and the northern buffer zone are being characterized in the DOE portion of the project. Boeing continues to investigate and characterize soils in Area I, Area Ill, and the southern buffer zone. Boeing's surficial media characterization work will be divided into units identified as Boeing RFI Subareas:
- 1A North, 1A Central, 1A South
- 1B North, 1B Southwest, 1B Southeast
- 5/9 North, 5/9 South, and
- Group 10
- Pre-demolition removal and Class I Landfill disposal of remnant contents of decommissioned former radiological Area IV buildings 4009, 4100, and 4055 was completed in late April 2013. Contents removed included office furniture, asbestos and hazardous paint-containing construction materials, electronic waste, surplus non-nuclear research equipment (mostly laser research-related), and general trash.
- DTSC issued a letter dated April 30, 2013, concurring with the removal of remnant slabs, roadways, and minor infrastructure at the Area III former Nitrogen Depot site, as proposed in the April 1, 2013 document Notification of Planned Removal, Non Building Area, Remaining Concrete and Asphalt Located at the Former Nitrogen Gas Depot Area, (Area III). Boeing plans to commence removals at the site in early May, 2013.
- DTSC continues to review demolition proposals for two additional former radiological Boeing Area IV sites located in Area IV, the Building 4005 (former Uranium Carbide Manufacturing Building) remnant slab and the Building 4011 Low Bay (former Calibration Lab). CDPH recommendations for these sites are expected to be provided to DTSC during the first week of May, 2013.
- DTSC continued coordination with US EPA to provide oversight of the Boeing radiological building review.
- DTSC completed review of Boeing's February 6, 2013 proposal to remove, survey, and dispose of remnant concrete and asphalt debris from the former radiological L-85 (Research Reactor) site in SSFL Area IV. DTSC's comments on the L-85 demolition proposal include recommendations provided by the CDPH Radiologic Health Branch on April 19, 2013. With DTSC and CDPH comments, Boeing anticipates removal and focused radiological surveys of the L-85 disposal debris during the second week of
- May, 2013. All debris will be disposed of at a Class I Hazardous Waste Landfill, and both DTSC and CDPH will review survey results prior to debris removal and disposal.
Surficial Media Investigation
Boeing is utilizing the Data Quality Objectives process and standard operating procedures that were developed for planning and sampling work to be conducted to complete the characterization of surficial media.
- Boeing Subarea 5/9 South
- STL-IV site
- On April 23, DTSC approved the RFI Data Gap Work Plan Addendum for STL-IV.
- On Monday April 29, Boeing began sampling at the site.
- Compound A, STP-3, and EEL, and areas not associated with RFI sites
- Boeing and DTSC met to discuss DTSC's review of RFI Data Gap Work Plan Addendums sites in Boeing Subarea 5/9 South.
- Based on an April 24 meeting, Boeing submitted responses to comments on the draft work plan addenda for the Subarea 5/9 South sites.
- On April 26, Boeing submitted the revised GIS files and figures that will be used for the public meeting. DTSC is verifying that the responses to comments sufficiently address comments on the draft addenda.
- Subarea 1A North
- B-1, IEL, Area 1 Landfill, and areas not associated with RFI sites in Subarea 1A North
- On April 15, Boeing submitted a Data Gap Work Plan Addenda for B-1, IEL, Area 1 Landfill, and areas not associated with RFI sites in Subarea 1A North.
- DTSC is currently reviewing the Subarea 1A North Data Gap Work Plan Addenda.
- Boeing is continuing to develop Data Gap Work Plan Addendums for the remainder of the sites.
Groundwater Characterization and CleanupThe groundwater characterization and cleanup program is being conducted by the three responsible parties (RPs) at the site; Boeing, DOE and NASA. The groundwater characterization and cleanup program consists of:
- Investigation and characterization of groundwater contamination;
- Groundwater monitoring;
- Groundwater interim measures; and
- Treatment of contaminated groundwater with permitted discharge from the Groundwater Extraction and Treatment System.
Investigation and Characterization of Groundwater Contamination
- Groundwater Remedial Investigation (GWRI) Data Gap Work
- Data gaps were identified in the 2009 GWRI Report. DTSC also identified additional data gaps that were presented in the GWRI comments. The data gap work has been divided into five (5) categories:
- Data gaps identified in the RI Report;
- Characterization of seeps and springs;
- Characterization of faults;
- Groundwater flow model; and
- Contaminant transport modeling.
- Status of GWRI Data Gap Work
Work to fill the source zone data gaps is being addressed in the data gap work plans.
- Seeps and Springs
- Boeing is working under the approved work plan to complete characterization of seeps and springs.
- Reconnaissance and access agreement work are ongoing.
- On April 29, crews mobilized to begin work on seep and springs characterization.
- Boeing is working under the approved work plan to fill the data gaps in characterization of faults;
- Contractor procurement and pre-mobilization work is ongoing.
- Detailed review of structural geology is in progress.
- RD-10 pump test
- The RD-10 pump test at the Happy Valley Fault ended on April 18.
- Monitoring is ongoing as the groundwater conditions recover from the influence of pumping.
- Aquifer properties will be calculated from the data covering pumping and recover conditions.
- DTSC conducted site visits to qualitatively assess the flows in Bell Creek.
- Groundwater flow model and contaminant transport modeling
- Boeing is continuing preparation of Work Plans for the groundwater flow model and is developing an approach for contaminant transport modeling.
- Treatability Studies
Treatability studies are being conducted on several technologies to be evaluated in the feasibility study. The treatability studies address both soil/bedrock and groundwater contamination. Treatability studies can be either field studies or laboratory studies.
- Four groundwater laboratory studies are being conducted:
- Chemical oxidation using potassium permanganate;
- Thermal heating of rock core;
- Microbial characterization of rock core, pore water; and
- Two field studies are being conducted:
- In-situ chemical oxidation using potassium permanganate; and
- Bedrock vapor extraction.
- Status of Treatability Study Testing
- The groundwater laboratory studies for microbial characterization of rock core, pore water, and bio-stimulation are ongoing in university research laboratories.
- In-situ chemical oxidation (ISCO) test planning is continuing.
- The public comment period for the ISCO work plan ended on April 18.
- The project will be approved after finalization of cultural resources issues in the CEQA process.
- A waste discharge requirements application will be submitted to the Water Board after the project is approved.
- NASA submitted a request to move the bedrock vapor extraction (BVE) treatability study from Boeing's Bowl site to NASA's Coca site.
- DTSC conditionally approved the request.
- Shallow water was encountered at the Coca core holes and, as a result, alternate sites for the BVE test are being evaluated.
- Boeing is preparing the First Quarter, 2013 Groundwater Monitoring Report.
- DTSC is reviewing the 2012 Annual Report.
Groundwater Interim Measures (GWIM)The Groundwater Interim Measures project includes the installation and operation of eight source zone groundwater extraction wells, with the water being sent to the existing Groundwater Extraction Treatment System (GETS). The GETS water is discharged at Outfall number 19.
- Preparation to install piping for the GWIM is ongoing.
Operation of WS-09AWS-09A, located in the southwest corner of Area II, north of the southern buffer zone, is on a pumping program to lower the groundwater elevation near seep SP-890, and to reduce the amount of Trichloroethene (TCE) contamination in groundwater in the immediate area. When operating, groundwater extracted from WS-9A is pumped to the GETS.
Interim Source Removal Actions (ISRA) (Note: ISRA activities are conducted under the authority of the Los Angeles Regional Water Quality Control Board (LA-RWQCB))
- WS-9A has not been pumping since November 2012.
- Pumping at WS-9A was initially stopped because of mechanical problems. The problems have not yet been fixed.
- WS-9A was not pumped during the RD-10 pump test because the GETS could not adequately treat water from WS-9A and RD-10 simultaneously.
- The water levels in the seep areas downstream of WS-9A are being monitored.
- Surface water in the seep areas is being collected by a vacuum truck and transported to the GETS for treatment and discharge.
- Pumping at WS-9A will resume after further studies of conditions at the pumping location and outfall have been performed.
- Boeing ISRA activities generated approximately 15 cubic yards of soil from Instrument and Equipment Laboratory (IEL) location IEL-3 in late January 2013. The soil continues to be held on site in a soil bin pending final evaluation and concurrence of radiological certification by CDPH.
- NASA ISRA activities conducted in April included radiological confirmation and delineation soil sampling at the LOX locations LOX-1C and LOX-1D. NASA is also in process of developing waste profile for Expendable Launch Vehicle (ELV) soils with radionuclide concentration exceeding Draft Provisional Radiological Look-Up Table (LUT) values to allow off site transport and landfill disposal at Energy Solutions facility in Utah.
Public Participation Past 30 Days
- On April 5 and April 8, 2013, DTSC sent an electronic announcement inviting the SSFL community to attend the Community Update Meeting scheduled for April 17, 2013.
- On April 4, 2013, DTSC mailed hard copy invitations for the SSFL Community Update Meeting to a mailing list of 3000+ and dropped off over 500 flyers at the local libraries -Platt Library and Simi Valley Library.
- On April 9, 2013, the DTSC Monthly SSFL Update Report was emailed to 900+elist subscribers.
- On April 15. 2013, DTSC announced the SSFL Community Advisory Group membership roster via an e-blast sent to 900+ e-list subscribers.
- On April 17, 2013, DTSC hosted an SSFL Community Update Meeting at the Grand Vista Hotel located at 999 Enchanted Way, Simi Valley, CA. Staff from DTSC and the Los Angeles Regional Water Quality Control Board provided information on the status of the cleanup actions taking place at the site. Additionally, representatives from the responsible parties; Department of Energy, NASA, and Boeing, were available to answer questions pertaining to their cleanup activities. Over 100 community members attended this meeting.
- On April 18, 2013, the DTSC 30-day Public Comment Period for the draft ISCO Work Plan and Initial Study was concluded. A total of 2 comments were received.
- On April 25, 2013, DTSC sent an electronic announcement inviting the SSFL community to attend a DTSC Technical Community Meeting regarding the Boeing RFI Subarea 5/9 South, including Hydrogen Lab, Sewage Treatment Plant 3 and Compound A Sites. The meeting is scheduled for May 9, 2013, from 9AM- Noon at the SSFL site.
- A total of 3 electronic notifications of document postings to the website were sent to the SSFL community.
Activities Expected to Occur Within the Next 30 Days (May2013):
Chemical Soil Background Study and related Look-up Table
- DTSC will hold a community meeting on May 22, 2013 to present the chemical-constituent Look-Up Table values for application under the Administrative Orders on Consent with both NASA and DOE.
California Environmental Quality Act (CEQA)
- DTSC will continue efforts to select a contractor for programmatic CEQA work.
- NASA will continue working on the Data Summary Reports for the first phase of the 2011-2012 chemical data gap investigation (Field Sampling Plans (FSPs) 1 through 5) are in preparation for release in 2013.
- NASA will continue working on the surficial media sampling plan (FSP-6) to address remaining data gaps from the initial five FSPs implemented in 2011-2012.
On May 29, 2013, DOE will host an evening public meeting to discuss continuation of the next phase of soil treatability studies. Meeting location and time are to be determined, and will be posted on DTSC's calendar in advance of the meeting.
- On May 30, 2013, DOE will host a Soil Treatability Investigation Group meeting. Meeting location and time are to be determined, and will be posted on DTSC's calendar in advance of the meeting.
DTSC will continue review of the demolition proposals for two former radiological Boeing sites in Area IV, the Building 4005 remnant slab, and the Building 4011 Low Bay. These reviews are being conducted in consultation with CDPH.
- DTSC anticipates that Boeing will submit a proposal for the demolition of the decommissioned former radiological Building 4055 (Nuclear Materials Development Facility), located in Area IV.
- DTSC staff will also conduct field oversight during the planned removals and focused radiological surveys at the L-85 (Research Reactor) site in Area IV and the Former Nitrogen Depot site in Area III.
- DTSC will continue coordination with US EPA to provide oversight of the Boeing radiological building review.
Surficial Medial Investigation