SANTA SUSANA FIELD LABORATORY REMEDIAL INVESTIGATION REPORT GROUP 3

Transcription

1 SANTA SUSANA FIELD LABORATORY REMEDIAL INVESTIGATION REPORT GROUP 3 Buck King, PG, CHG California Environmental Protection Agency Department of Toxic Substances Control 1

2 TODAY S S DISCUSSION RI Report objectives and scope RI Report organization Group 3 RI site features RI Report findings DTSC Preliminary Recommendations 2

3 Group 3 RI Report Available on DTSC-SSFL web site for public review: Public comment until December 4, 2009 Group 3 Remedial Investigation report is the 7 th RFI Group Report submitted Remedial Investigation (RI) Report is equivalent to RCRA Facility Investigation (RFI) Report The change from RFI to RI terminolgy reflects SB-990 requirements. 3

4 RI OBJECTIVES Identify all potential chemical release areas (Contaminant Characterization) Evaluate chemical contamination mobility (Contaminant Fate and Transport) Evaluate human and ecological risk (Risk Assessment) Identify areas requiring cleanup evaluation (Recommendation to proceed to Feasibility Study) 4

5 RI RECOMENDATIONS RI Recommendations can be No Further Action (NFA) Site cleanup evaluation in Feasibility Study (FS) Interim removal or stabilization measures 5

6 IMPORTANT ISSUES STILL IN DEVELOPMENT SB990-compliant risk assessments, with Agricultural Residential Risk-Based Screening Levels (RBSLs( RBSLs) ) need to be completed Updated comprehensive background data set for select chemicals needs to be completed 6

7 RISK ASSESSMENT Report includes both Human and Ecological Risk Assessments of sites Pre-SB990 Risk-Based Screening Levels (RBSLs)) were used in report conclusions and recommendations DTSC has temporarily suspended reviews of RFI risk assessments 7

8 DTSC IS PROCEEDING WITH REVIEWS Review of RI Report will support timely project completion (2017 target date) Additional sample needs and data gaps identified during RI review can be addressed using SB990 more stringent standards DTSC review comments will incorporate public comments and improve final RI Report quality. 8

9 GROUP 3 RI REPORT Focuses on Surficial Media (soil, soil gas, shallow groundwater) Based on review of historical records (documents, drawings, records, photographs, interviews) Summarizes numerous previous investigations in Group 3 site area 9

10 SURFICIAL MEDIA 10

11 GROUP 3 OVERVIEW 11

12 GROUP 3 REPORT AREA SEVEN RFI SITE AREAS Nine Sites Skyline Road Area 12

13 SURFACE DRAINAGES 13

14 GROUP 3 OPERATIONAL ACTIVITIES Operational from mid 1950s to 2006 Maintenance shops and storage (B204) Liquid fuel rocket - jet engine test stands and support facilities (Alfa and Bravo) Storable propellant handling and storage (SPA) Liquid Fuel Storage and Supply (ABFF) Process Water Storage (Skyline Road) Hazardous Waste Handling (HWCT) 14

15 GROUP 3 CHEMICAL CONTAMINANTS AND RELEASE AREAS MAJOR CHEMICALS: Solvents (TCE) Petroleum (RP-1, RJ-1) Oils / PCBs Metals / Inorganics Perchlorate / Energetics Dioxins/Furans Others (Hydrazine Fluorene,, Acids, Pesticides) RELEASES COMMON AT: Rocket Engine Test Stands Skim Ponds Leachfields Neutralization Ponds Sewer Lines Tanks and Piping Transformers Debris Areas 15

16 16

17 17

18 SEVEN SITE AREA SUMMARIES Building 204 Area Storable Propellant Area (SPA) Alfa Bravo Fuel Farm Area Bravo Area Alfa Area Skyline Road Area Hazardous Waste Coolant Tank Area 18

19 BUILDING 204 SITE Building 204 Service Area Active 1950 s 1990s Automotive and equipment maintenance shops and storage, paint booth, carpenter shop RI Areas of Chemical Use, Storage, or Disposal 1,500 Gallon Fuel Oil UST (UT-48) 10,000 Gallon Gasoline UST (UT-49) 500 Gallon Waste Oil UST (UT-50) B204 Debris Field Building 204, 205, 233,

20 BUILDING 204 AREA 20

21 BUILDING 204 SITE RI RESULTS Evaluate site for cleanup in FS Dioxins and furans in soil pose human health risk. Recommendation for additional soil dioxin and furan characterization. Recommendation for additional nature and extent evaluation for: 8 metals (antimony, cadmium, chromium VI, copper, lead, mercury, silver, and zinc) 2 PCBs (Arochlor-1254 and Arochlor-1260) Benzo(a)pyrene 21

22 BUILDING 204 SITE AROCLOR 1260 RESULTS 22

23 STORABLE PROPELLANT AREA (SPA) SPA Area Active Approx Bulk storage of propellant (fuel and oxidizers) Drum and container rinsing and neutralization RI Areas of Chemical Use, Storage, or Disposal SPA-1 41,000 gallon Pond SPA-2 18,000 gallon Pond 5 ASTs (total of 75,000 gallons of RP-1) Other ASTs storing other fuels and oxidizers Storage Buildings Storage Pads 23

24 SPA AREA 24

25 SPA RI RESULTS Evaluate site for cleanup in FS Formaldehyde, benzo(a)pyrene, benzo(a)anthracene, and methylene chloride in soil pose human health risk TCE in soil gas poses human health risk Recommendation that site characterization is complete for other chemicals and no additional nature and extent soil or soil gas sampling is needed for FS 25

26 SPA TCE IN SOIL GAS 26

27 ALFA/BRAVO FUEL FARM (ABFF) Active Approx Bulk Storage of Liquid Fuel in ASTs Pumping and Piping of Fuel from ASTs to Alfa or Bravo Test Stands RI Areas of Chemical Use, Storage, or Disposal Two 33,000-gallon ASTs (RP-1) Three 10,000-gallon ASTs (RJ-1) Fuel Pumping Station Fuel Piping System Fuel Truck Loading and Unloading 27

28 ALFA/BRAVO FUEL FARM 28

29 ALFA/BRAVO FUEL FARM RI RESULTS Evaluate site for cleanup in FS Complete nature and extent evaluation of TPH in soil Arsenic in soil poses human health risk Recommendation that site characterization is complete for other chemicals and no additional nature and extent soil or soil gas sampling is needed for FS. 29

30 ALFA/BRAVO FUEL FARM KEROSENE RESULTS 30

31 BRAVO SPA ABFF B204 31

32 BRAVO AREA Active Approx Rocket Engine Test Stands Rocket Motor Tests with RP-1/RJ-1 and LOX Required TCE Cleaning RI Areas of Chemical Use, Storage, or Disposal Three Engine Test Stand (2/3 Remaining) Two Former Skim Ponds (Bravo Pond and Alfa/Bravo Pond) Surface Drainage Channels 1,000 gallon waste liquid AST Bravo Groundwater Treatment Plant Building 213 Leach Field Building 217 Leach Field Alfa/Bravo Skim Pond Bypass Drainage Piping 32

33 33

34 BRAVO AREA 34

35 35

36 36

37 BRAVO AREA RI RESULTS Evaluate site for cleanup in FS PCBs and benzo(a)pyrene,tce, and Cadmium in soil pose human health risk Complete nature and extent evaluation of dioxins, PCBs and benzo(a)pyrene,tce, and Cadmium in soil Complete evaluation of VOCs in soil gas VOCs in soil gas pose human health risk Arsenic in soil poses human health risk 37

38 BRAVO AREA TCE SOIL GAS RESULTS 38

39 ALFA AREA Active Approx Rocket Engine Test Stands Rocket Motor Tests with RP-1/RJ-1 and LOX Required TCE Cleaning RI Areas of Chemical Use, Storage, or Disposal Three Engine Test Stands (2/3 Remaining) Two Former Ponds (Alfa Skim Pond and Alfa Detention Pond) Surface Drainage Channels Two 1,500 gallon waste TCE ASTs One 4,775 gallon waste RP-1 AST One former waste TCE AST Building 208 Leach Field Building 212 Leach Field 39

40 ALFA AREA 40

41 ALFA AREA RI RESULTS Evaluate site for cleanup in FS TCE in soil poses a human health risk VOCs in soil gas pose human health risk Complete nature and extent evaluation of dioxins,tce, Lead, Nickel, Silver, Zinc in soil Complete evaluation of VOCs in soil gas Arsenic in soil poses human health risk 41

42 ALFA AREA TCE SOIL GAS 42

43 SKYLINE ROAD AREA Active Approx 1950s 2006 in association with Rocket Engine Test Stands (Alfa, Bravo, and Coca) AST Tank Farm Containing Potable Water and Reclaimed Water. Reclaimed Water composed of Treated Sewage, Captured Storm Water, Captured Facility Industrial Cooling Water. RI Areas of Chemical Use, Storage, or Disposal RI states no chemical use areas RI identifies 3 pole mounted electrical transformers as area of interest GSU notes that Reclaimed Water and associated ASTs are potential chemical contamination areas. 43

44 SKYLINE ROAD AREA 44

45 SKYLINE ROAD AREA 45

46 SKYLINE ROAD AREA RI RESULTS Evaluate site cleanup in FS Complete nature and extent evaluation of dioxins in soil Dioxins in soil pose human health risk 46

47 SKYLINE ROAD DIOXINS 47

48 HAZARDOUS WASTE COOLANT TANK (HWCT) Active Approx gallon AST used to contain waste cutting/cooling oil. Tank owned and operated by Boeing on NASA property. RI Areas of Chemical Use, Storage, or Disposal RI identifies former AST (SWMU 5.7) as the only chemical use area. RI acknowledges the existence of former Hazardous Waste Storage Area (SWMU 5.8) adjacent to Hazardous Waste Coolant Tank GSU notes that RI does not include any information regarding Hazardous Waste Storage Area (SWMU 5.8). 48

49 HWCT AREA 49

50 HWCT TANK AREA RI RESULTS No human health risk identified Recommendation for no additional investigation. 50

51 HWCT TPH RESULTS 51

52 SURFICIAL MEDIA OPERABLE UNIT (SMOU) GROUNDWATER Near Surface Groundwater migrating into underlying Chatsworth Formation Groundwater Operable Unit: - VOCs verified in Alfa Test Stand Spillway - VOCs suspected in Bravo Test Spillway and Catch Pond Area - TPH suspected at Alfa Bravo Fuel Farm 52

53 REPORT RECOMMENDATIONS AND DTSC PRELIMINARY COMMENTS 53

54 GROUP 3 REPORT RECOMMENDATIONS The Group 3 RI Report recommends: 6 sites be carried into next phase of Feasibility Study (FS) for cleanup evaluation 1 site (Hazardous Waste Coolant Tank) identified for No Further Action (NFA) 54

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

56 PRELIMINARY DTSC REVIEW FINDINGS (2) All RI sites must ultimately be addressed using SB990-compliant criteria and updated background data, which may expand the RI site recommendations for FS evaluation Report revisions must ultimately address all specific DTSC technical comments. 56

57 COMMENTS ON REPORT Public Comment until December 4 Buck King Susan Callery bking@dtsc.ca.gov scallery@dtsc.ca.gov Mail: Buck King 700 Heinz Ave Berkeley, CA Phone: (510)

58 OPEN DISCUSSION 58

59 GROUP 3 RI REPORT Issued May 2009 Prepared for NASA by CH2M-Hill Hill Public comment until December 4 DTSC estimates review complete in January

60 REPORT LAYOUT VOLUME 1 VOLUME 2 VOLUME 3 MAP ROLL Group 3 R I Report Text and Tables Appendices A - H (Eco Survey, 7 RI Site Specific Risk Assessments) Appendices I &J (Groundwater Laboratory Data & Building Feature Logs) Approx inch by 36- inch Figures 60

61 SEVEN RFI SITE AREA SUMARY Nine Sites Skyline Road Area 61

62 PROXIMITY TO COMMUNITIES 62