SANTA SUSANA FIELD LABORATORY RCRA FACILITY INVESTIGATION REPORT GROUP 1A

Transcription

1 SANTA SUSANA FIELD LABORATORY RCRA FACILITY INVESTIGATION REPORT GROUP 1A Paul Carpenter, PG, CHG California Environmental Protection Agency Department of Toxic Substances Control 1

2 TODAY S S DISCUSSION Review Group 1A site conditions and history Define RFI Report objectives and scope Describe Report contents, organization, review strategies Present Report findings and DTSC preliminary conclusions 2

3 IMPORTANT ISSUES STILL IN DEVELOPMENT SB990-compliant risk assessments, with Agricultural Residential Risk-Based Screening Levels (RBSLs( RBSLs) Updated comprehensive background data set for select chemicals Refined laboratory detection and reporting limits for chemical contaminants 3

4 DTSC IS PROCEEDING WITH REVIEWS Review of characterization results will support timely project completion (2017 target date) Many Group 1A sites (55) recommended for more investigation based on pre-sb990 criteria review allows verification Additional sample needs identified from current report can be completed to more stringent standards DTSC reviewers need to develop familiarity with sites and reports, maintain current momentum 4

5 SSFL GROUP 1A SITE CONDITIONS AND HISTORY 5

6 SSFL OVERVIEW 6

7 GROUP 1A REPORT AREA Nine Sites 7

8 SURFACE DRAINAGES Outfall 9 Outfall 15 Outfall 8 No seeps / springs within G1A 8

9 PROXIMITY TO COMMUNITIES 9

10 GROUP 1A SITES B-1 1 Test Area Area 1 Landfill Building 359 Site Canyon Test Area Happy Valley North Happy Valley South Instrument and Equipment Lab Advanced Propulsion Test Facility Laser Engineering Test Facility - Component Test Lab 1 10

11 B-1 GROUP 1A RFI SITES APTF LETF-CTL CTL-1 CANYON A1LF HVN IEL HVS B359 Operational from 1940s 2000s No current aerospace activities Now used for administrative, site management, and site cleanup purposes 11

12 GROUP 1A OPERATIONAL ACTIVITIES Operational from late 1940s to 2000s Administrative offices, shops and storage Component, material and fuel testing labs Small engine and component test areas Liquid fuel rocket - jet engine test stands and support facilities Solid propellant and energetics handling and test facilities Laser test facilities 12

13 RADIOLOGICAL ISSUES Report concludes no significant radiologic- related work documented at Group 1A sites SPECIFIC AREAS OF RAD INTEREST LETF POND Tritium discharge in 1980 s AILF Unscreened debris disposed in landfill IEL AI Tower - SRE rod mockup tower Others (leach fields, debris areas) **DTSC will require rad surveys at Area 1** 13

14 GROUP 1A RFI REPORT OVERVIEW 14

15 GROUP 1A RFI REPORT Issued March 2009 Prepared for the Boeing Corporation by Montgomery Watson Inc. (MWH) Available on DTSC-SSFL SSFL web site for public review: ssfl.com/ Public comment until August 30 DTSC estimates review complete Fall

16 GROUP 1A RFI REPORT Focuses on Surficial Media (soil, soil vapor, shallow groundwater) Based on review of extensive historical records (documents, drawings, records, photographs, interviews) Summarizes numerous investigations over 15+ years at Group 1A sites Report = 14 major sections in 21 binders 16

17 REPORT LAYOUT VOLUME 1 APPENDIX A - I APPENDIX J APPENDIX K APPENDIX L APPENDIX M Integrated Summary Report Detailed stand-alone reports for each of the nine sites Chemicals In Groundwater Human and Ecological Risk Assessments Debris Survey Report (2008) Sewer Line Survey Report ADDENDUM Building Documentation Logs 17

18 RFI OBJECTIVES Present chemical characterization results and identify the nature and extent of chemical contamination Perform human health and ecological risk assessments for chemicals Recommend site actions: No Further Action (NFA) Further evaluation in Corrective Measures Study (CMS) Interim removal or stabilization measures 18

19 RFI STRATEGY Identify Chemical Use Areas at locations of known or suspected chemical releases Use soil, soil vapor, and water sample results to delineate sources and extent of chemical releases Perform Human and Ecological Risk Assessments Recommend next steps for remedy 19

20 SURFICIAL MEDIA 20

21 GROUP 1A CHEMICAL CONTAMINANTS AND RELEASE AREAS MAJOR CHEMICALS: Solvents Petroleum Oils / PCBs Metals / Inorganics Perchlorate / Energetics Dioxins/Furans Others (Hydrazine Fluorene,, Acids, Pesticides) RELEASES COMMON AT: Leach Fields Landfills Discharge Ponds Neutralization Ponds Sewer Lines Tanks and Piping Transformers Debris Areas 21

22 POTENTIAL CHEMICAL USE AREAS 22

23 PRE-DEMOLITION DOCUMENTATION IEL Site 23

24 IMPACTS TO NEAR-SURFACE GROUNDWATER TCE (Solvent) Impacts 24

25 RISK ASSESSMENTS Report includes both Human and Ecological Risk Assessments of sites (results in Volume 1, Table ES-2) Pre-SB990 Risk-Based Screening Levels (RBSLs)) were used in report conclusions and recommendations Risk Assessment methodology discussed in Appendix K DTSC has temporarily suspended reviews of RFI risk assessments 25

26 REVIEWING THE REPORT- WHERE IS KEY INFO? VOLUME 1 SUMMARY REPORT Executive Summary Table ES-1 Table ES-2 Figure ES-1 Figure 4 Summary of Corrective Measures Recommendations Results and Site Action Recommendations (Including No Further Action (NFA) Areas Recommended for Corrective Measures Chemical Analysis Results Summary Figures (18) 26

27 CHEMICAL ANALYSIS RESULTS (DOT MAPS) VOLUME 1 SUMMARY FIGURES (FIG 4-1C) 4 Example: TCE 27

28 CHEMICAL ANALYSIS RESULTS METALS EXAMPLE (FIG 4-6A) 4 28

29 REVIEWING APPENDIX A I INVESTIGATION SUMMARIES (TABLE 3-2A) 3 Example from LETF (Appendix H) 29

30 REPORT RECOMMENDATIONS AND DTSC PRELIMINARY COMMENTS 30

31 GROUP 1A REPORT RECOMMENDATIONS The Group 1A RFI Report recommends: 55 sites across Group 1A be carried into next phase of Corrective Measures Study (CMS) evaluation 18 sites be granted No Further Action (NFA) status 3 sites have source stabilization (runoff barriers) maintained 31

32 VOLUME 1 FIG. ES-1 AREAS RECOMMENDED FOR CORRECTIVE MEASURES STUDIES (CMS) 32

33 PRELIMINARY DTSC REVIEW FINDINGS (1) DTSC's review of the report and historical information is ongoing, and comments are being generated. Due to the outstanding issues, DTSC can not concur with RBSL-based NFA recommendations for any sites at this time. DTSC concurs with the 55 sites recommended for CMS evaluation, provided all chemicals at sites are adequately characterized. 33

34 PRELIMINARY DTSC REVIEW FINDINGS (2) All RFI sites must ultimately be addressed using SB990-compliant criteria and updated background data, which may expand the number of RFI sites for the CMS evaluation Report revisions must ultimately address all specific DTSC technical comments 34

35 COMMENTS ON REPORT Paul Carpenter Susan Callery Mail: Paul Carpenter 8800 Cal Center Drive Sacramento, CA Phone: (916)

36 OPEN DISCUSSION 36

37 B-1 1 TEST AREA Approximately 7.7 acres Active from 1948 to mid-1970s Used for rocket, jet engine testing, storage RFI Areas B-1 Test Area Building 1312 Leach Field All structures and buildings removed 37

38 B-1 1 TEST AREA 38

39 INSTRUMENT & EQUIPMENT LABS (IEL) Approximately 25.2 acres Operational since 1940 s RFI Units Building 1324 Hazardous Waste Tank Building 1301 TCA Distillation Unit, Product Tank, Acid Bays Nine AOCs (Building 1324 and Building 1300 Leach Fields) Seven fuel /solvent underground storage tanks [USTs[ USTs] Former Dry Well from 1950s Select building demolition now under way 39

40 INSTRUMENT AND EQUIPMENT LABS 40

41 AREA 1 LANDFILL (A1LF) Approximately 2.4 acres. Material disposed from 1940s to 1970s Staging area for other uses Former leach field within landfill RFI Unit SWMU 4.4 (Area I Landfill) Partially paved, no structures 41

42 AREA 1 LANDFILL 42

43 BUILDING 359 SITE Approximately 3.5 acres Active 1950 s 1990s Used for solid propellant / energetics testing, storage, and support RFI Areas of Concern (AOC) Building 1359 Leach Field and Sump Building 1741 Leach Field Building 1376 Leach Field All Structures Removed 43

44 B359 SITE 44

45 ADVANCED PROPULSION TEST FACILITY (APTF) Approximately 5.0 acres Testing of rocket components, engines, and laser research Active RFI Units APTF Test Area (four bays, over 150 tanks) Impoundments APTF-1 1 and APTF-2 2 (closed) Aboveground Storage Tanks [ASTs[ ASTs] Structures demolished in June

46 APTF 46

47 HAPPY VALLEY NORTH (HVN) AND SOUTH (HVS) Combined 14 Acres Active 1950s to 1990s Energetics and perchlorate used for solid propellant, gun and flare testing / production RFI Units Former Building 1315 Area Former Building 1316/Tunnel Facility Area Former Building 1372 Area Gun Propellant Test Area, Motor Test Area Propellant Support Buildings Exotic Materials Test Area Interim removal and biotreatment of impacted soils in Structures removed, site regraded 47

48 HAPPY VALLEY NORTH AND SOUTH 48

49 LASER ENGINEERING TEST FACILITY / COMPONENT TEST LAB I (LETF/CTL1) Approximately 8.1 acres s LETF high energy fuel research, laser testing CTL-1 rocket engine component testing, laser diagnostic studies, machine shop RFI Units Laser Engineering Test Facility Laser Engineering Test Facility Pond Buildings 1309 and 1317/1423 Leach Fields CTL1 demolition complete LETF demolition in July-August

50 LETF / CTL-1 LETF CTL-1 50

51 CANYON TEST AREA Approximately 12.9 acres Active from 1950 s s to 1970 s Large Liquid Rocket Testing RFI Units Canyon Test Area (3 Test Stands) Canyon Skim Pond and Retention Pond Canyon Groundwater Extraction/Treatment System Buildings 1382 and 1375 Leach Fields Some small structures remain 51

52 CANYON 52

53 CHATSWORTH FM GROUNDWATER IMPACTS 53

54 54