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SANTA SUSANA FIELD LABORATORYSANTA SUSANA FIELD LABORATORY RCRA FACILITY INVESTIGATION REPORTRCRA FACILITY INVESTIGATION REPORT

GROUP 1AGROUP 1A

Paul Carpenter, PG, CHGPaul Carpenter, PG, CHGCalifornia Environmental Protection AgencyCalifornia Environmental Protection Agency

Department of Toxic Substances ControlDepartment of Toxic Substances Control

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TODAYTODAY’’S DISCUSSIONS DISCUSSION

•• Review Group 1A site conditions and historyReview Group 1A site conditions and history•• Define RFI Report objectives and scopeDefine RFI Report objectives and scope•• Describe Report contents, organization, Describe Report contents, organization,

review strategiesreview strategies•• Present Report findings and DTSC Present Report findings and DTSC

preliminary conclusionspreliminary conclusions

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IMPORTANT ISSUES STILL IN IMPORTANT ISSUES STILL IN DEVELOPMENTDEVELOPMENT

•• SB990SB990--compliant risk assessments, with compliant risk assessments, with Agricultural Residential RiskAgricultural Residential Risk--Based Based Screening Levels (Screening Levels (RBSLsRBSLs))

•• Updated comprehensive background data Updated comprehensive background data set for select chemicalsset for select chemicals

•• Refined laboratory detection and reporting Refined laboratory detection and reporting limits for chemical contaminantslimits for chemical contaminants

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DTSC IS PROCEEDING DTSC IS PROCEEDING WITH REVIEWSWITH REVIEWS

•• Review of characterization results will support Review of characterization results will support timely project completion (2017 target date)timely project completion (2017 target date)

•• Many Group 1A sites (55) recommended for Many Group 1A sites (55) recommended for more investigation based on premore investigation based on pre--SB990 criteria SB990 criteria –– review allows verificationreview allows verification

•• Additional sample needs identified from current Additional sample needs identified from current report can be completed to more stringent report can be completed to more stringent standardsstandards

•• DTSC reviewers need to develop familiarity with DTSC reviewers need to develop familiarity with sites and reports, maintain current momentumsites and reports, maintain current momentum

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SSFL GROUP 1A SSFL GROUP 1A SITE CONDITIONS AND HISTORYSITE CONDITIONS AND HISTORY

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SSFL OVERVIEWSSFL OVERVIEW

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GROUP 1A REPORT AREA

Nine Sites

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SURFACE DRAINAGESSURFACE DRAINAGES

No seeps / springs within G1ANo seeps / springs within G1A

Outfall 8Outfall 15

Outfall 9

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PROXIMITY TO COMMUNITIESPROXIMITY TO COMMUNITIES

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GROUP 1AGROUP 1A SITESSITES

BB--1 Test Area1 Test Area AreaArea 1 Landfill1 Landfill

Building 359 Site Building 359 Site Canyon Test Area Canyon Test Area

Happy Valley NorthHappy Valley North Happy Valley SouthHappy Valley South

Instrument and Equipment LabInstrument and Equipment Lab Advanced Propulsion Test Facility Advanced Propulsion Test Facility

Laser Engineering Test Facility Laser Engineering Test Facility -- Component Test Lab 1Component Test Lab 1

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GROUP 1ARFI SITESBB--11

HVSHVS

LETFLETF--CTLCTL--11

CANYONCANYON

IELIEL

B359B359

HVNHVN

A1LFA1LF

APTFAPTF

Operational from 1940s – 2000s

Now used for administrative, site management, and site cleanup purposes

No current aerospace activities

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GROUP 1A OPERATIONAL ACTIVITIESGROUP 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

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RADIOLOGICAL ISSUESRADIOLOGICAL ISSUES

•• LETF POND LETF POND –– Tritium discharge in 1980Tritium discharge in 1980’’ss•• AILF AILF –– Unscreened debris disposed in landfillUnscreened debris disposed in landfill•• IEL IEL –– AI Tower AI Tower -- SRE rod mockup towerSRE rod mockup tower•• Others (leach fields, debris areas)Others (leach fields, debris areas)

Report concludes no significant radiologicReport concludes no significant radiologic-- related work documented at Group 1A sitesrelated work documented at Group 1A sites

SPECIFIC AREAS OF RAD INTERESTSPECIFIC AREAS OF RAD INTEREST

**DTSC will require **DTSC will require radrad surveys at Area 1**surveys at Area 1**

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GROUP 1A RFI REPORT OVERVIEWGROUP 1A RFI REPORT OVERVIEW

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GROUP 1A RFI REPORTGROUP 1A RFI REPORT

•• Issued March 2009 Issued March 2009 •• Prepared for the Boeing Corporation by Prepared for the Boeing Corporation by

Montgomery Watson Inc. (MWH)Montgomery Watson Inc. (MWH)•• Available on DTSCAvailable on DTSC--SSFL web site for SSFL web site for

public review: public review: http://www.dtschttp://www.dtsc--ssfl.com/ssfl.com/•• Public comment until August 30Public comment until August 30•• DTSC estimates review complete Fall DTSC estimates review complete Fall

20092009

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GROUP 1A RFI REPORTGROUP 1A RFI REPORT

•• Focuses on Focuses on SurficialSurficial Media (soil, soil Media (soil, soil vapor, shallow groundwater)vapor, shallow groundwater)

•• Based on review of extensive historical Based on review of extensive historical records (documents, drawings, records, records (documents, drawings, records, photographs, interviews)photographs, interviews)

•• Summarizes numerous investigations Summarizes numerous investigations over 15+ years at Group 1A sitesover 15+ years at Group 1A sites

•• Report = 14 major sections in 21 bindersReport = 14 major sections in 21 binders

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REPORT LAYOUTREPORT LAYOUT•• VOLUME 1VOLUME 1

•• APPENDIX A APPENDIX A -- II

•• APPENDIX JAPPENDIX J

•• APPENDIX KAPPENDIX K

•• APPENDIX LAPPENDIX L

•• APPENDIX MAPPENDIX M

IntegratedIntegrated Summary ReportSummary Report

Detailed Detailed ““standstand--alonealone”” reports for reports for each of the nine siteseach of the nine sites

Human and Ecological Risk Human and Ecological Risk AssessmentsAssessments

Debris Survey Report (2008)Debris Survey Report (2008)

Chemicals In GroundwaterChemicals In Groundwater

Sewer Line Survey ReportSewer Line Survey Report

ADDENDUMADDENDUM Building Documentation LogsBuilding Documentation Logs

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RFI OBJECTIVESRFI OBJECTIVES•• Present chemical characterization results Present chemical characterization results

and identify the nature and extent of and identify the nature and extent of chemical contamination chemical contamination

•• Perform human health and ecological risk Perform human health and ecological risk assessments for chemicals assessments for chemicals

•• Recommend site actions:Recommend site actions:–– No Further Action (NFA)No Further Action (NFA)–– Further evaluation in Corrective Further evaluation in Corrective

Measures Study (CMS)Measures Study (CMS)–– Interim removal or stabilization Interim removal or stabilization

measuresmeasures

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RFI STRATEGYRFI STRATEGY

• Identify “Chemical Use Areas” at locations of known or suspected chemical releases

• Use soil, soil vapor, and water sample results to delineate sourcessources and extent of chemical releases

• Perform Human and Ecological Risk Assessments

• Recommend next steps for remedy

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SURFICIAL MEDIASURFICIAL MEDIA

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GROUP 1A CHEMICAL CONTAMINANTS GROUP 1A CHEMICAL CONTAMINANTS AND RELEASE AREASAND RELEASE AREAS

MAJOR CHEMICALS:MAJOR CHEMICALS:•• SolventsSolvents•• PetroleumPetroleum•• Oils / PCBsOils / PCBs•• Metals / Metals / InorganicsInorganics•• PerchloratePerchlorate / / EnergeticsEnergetics•• Dioxins/FuransDioxins/Furans•• Others (Hydrazine Others (Hydrazine

FluoreneFluorene, Acids, Pesticides), Acids, Pesticides)

RELEASES COMMON AT:RELEASES COMMON AT:•• Leach FieldsLeach Fields•• LandfillsLandfills•• Discharge PondsDischarge Ponds•• Neutralization PondsNeutralization Ponds•• Sewer LinesSewer Lines•• Tanks and PipingTanks and Piping•• TransformersTransformers•• Debris AreasDebris Areas

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POTENTIAL CHEMICAL USE AREASPOTENTIAL CHEMICAL USE AREAS

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PREPRE--DEMOLITION DOCUMENTATIONDEMOLITION DOCUMENTATION

IEL SiteIEL Site

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IMPACTS TO NEARIMPACTS TO NEAR--SURFACE GROUNDWATERSURFACE GROUNDWATER

TCE (Solvent) TCE (Solvent) ImpactsImpacts

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RISK ASSESSMENTSRISK ASSESSMENTS

•• Report includes both Human and Ecological Report includes both Human and Ecological Risk Assessments of sites (results in Volume Risk Assessments of sites (results in Volume 1, Table ES1, Table ES--2) 2)

•• PrePre--SB990 RiskSB990 Risk--Based Screening Levels Based Screening Levels ((RBSLsRBSLs) were used in report conclusions and ) were used in report conclusions and recommendationsrecommendations

•• Risk Assessment methodology discussed in Risk Assessment methodology discussed in Appendix KAppendix K

DTSC has temporarily suspended DTSC has temporarily suspended reviews of RFI risk assessmentsreviews of RFI risk assessments

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REVIEWING THE REPORTREVIEWING THE REPORT-- WHERE IS KEY INFO?WHERE IS KEY INFO?

VOLUME 1 – SUMMARY REPORT

•• Executive SummaryExecutive Summary

•• Table ESTable ES--11 Summary of Corrective Summary of Corrective Measures RecommendationsMeasures Recommendations

•• Table ESTable ES--22 Results and Site Action Results and Site Action Recommendations (Including Recommendations (Including No Further Action (NFA)No Further Action (NFA)

•• Figure ESFigure ES--11 Areas Recommended for Areas Recommended for Corrective MeasuresCorrective Measures

•• Figure 4Figure 4 Chemical Analysis Results Chemical Analysis Results Summary Figures (18)Summary Figures (18)

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CHEMICAL ANALYSIS RESULTS (DOT MAPS) CHEMICAL ANALYSIS RESULTS (DOT MAPS) VOLUME 1 SUMMARY FIGURES (FIG 4VOLUME 1 SUMMARY FIGURES (FIG 4--1C)1C)

Example: TCEExample: TCE

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CHEMICAL CHEMICAL ANALYSIS ANALYSIS RESULTSRESULTS

METALS METALS EXAMPLE EXAMPLE (FIG 4(FIG 4--6A)6A)

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REVIEWING APPENDIX A REVIEWING APPENDIX A –– II INVESTIGATION SUMMARIES (TABLE 3INVESTIGATION SUMMARIES (TABLE 3--2A)2A)

Example from LETF (Appendix H)Example from LETF (Appendix H)

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REPORT RECOMMENDATIONS REPORT RECOMMENDATIONS AND DTSC PRELIMINARY AND DTSC PRELIMINARY

COMMENTSCOMMENTS

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GROUP 1A REPORT GROUP 1A REPORT RECOMMENDATIONSRECOMMENDATIONS

The Group 1A RFI Report recommends:The Group 1A RFI Report recommends:

•• 55 sites across Group 1A be carried into 55 sites across Group 1A be carried into next phase of Corrective Measures Study next phase of Corrective Measures Study (CMS) evaluation(CMS) evaluation

•• 18 sites be granted No Further Action 18 sites be granted No Further Action (NFA) status(NFA) status

•• 3 sites have source stabilization (runoff 3 sites have source stabilization (runoff barriers) maintainedbarriers) maintained

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AREAS AREAS RECOMMENDEDRECOMMENDED

FOR FOR CORRECTIVE CORRECTIVE MEASURES MEASURES

STUDIES (CMS)STUDIES (CMS)

VOLUME 1 FIG. ESVOLUME 1 FIG. ES--1 1

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PRELIMINARY DTSC REVIEW PRELIMINARY DTSC REVIEW FINDINGS (1)FINDINGS (1)

•• DTSC's review of the report and historical DTSC's review of the report and historical information is ongoing, and comments are information is ongoing, and comments are being generated. being generated.

•• Due to the outstanding issues, DTSC can Due to the outstanding issues, DTSC can not concur with RBSLnot concur with RBSL--based NFA based NFA recommendations for recommendations for any any sites at this time.sites at this time.

•• DTSC concurs with the 55 sites DTSC concurs with the 55 sites recommended for CMS evaluation, recommended for CMS evaluation, provided all chemicals at sites are provided all chemicals at sites are adequately characterized.adequately characterized.

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PRELIMINARY DTSC REVIEW PRELIMINARY DTSC REVIEW FINDINGS (2)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

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COMMENTS ON REPORTCOMMENTS ON REPORT

•• Paul CarpenterPaul Carpenter pcarpent@dtsc.ca.gov•• Susan Susan CalleryCallery scallery@dtsc.ca.gov

EE--mail:mail:

Mail:Mail: Paul CarpenterPaul Carpenter8800 Cal Center DriveSacramento, CA 95826Phone: (916) 255-3691

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OPEN OPEN DISCUSSIONDISCUSSION

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BB--1 TEST AREA1 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

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BB--1 TEST AREA1 TEST AREA

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INSTRUMENT & EQUIPMENT LABS (IEL)INSTRUMENT & EQUIPMENT LABS (IEL)•• Approximately 25.2 acresApproximately 25.2 acres•• Operational since 1940Operational since 1940’’ss•• RFI UnitsRFI Units

–– Building 1324 Hazardous Waste TankBuilding 1324 Hazardous Waste Tank–– Building 1301 TCA Distillation Unit, Product Tank, Building 1301 TCA Distillation Unit, Product Tank,

Acid BaysAcid Bays–– Nine Nine AOCsAOCs (Building 1324 and Building 1300 Leach (Building 1324 and Building 1300 Leach

Fields)Fields)–– Seven fuel /solvent underground storage tanks [Seven fuel /solvent underground storage tanks [USTsUSTs]]–– Former Former ““Dry WellDry Well”” from 1950sfrom 1950s

•• Select building demolition now under waySelect building demolition now under way

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INSTRUMENT INSTRUMENT AND AND

EQUIPMENT EQUIPMENT LABSLABS

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AREA 1 LANDFILL (A1LF)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

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AREA 1 LANDFILL

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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

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B359 SITEB359 SITE

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ADVANCED PROPULSION TEST ADVANCED PROPULSION TEST FACILITY (APTF)FACILITY (APTF)

•• Approximately 5.0 acresApproximately 5.0 acres•• Testing of rocket components, engines, Testing of rocket components, engines,

and laser research and laser research •• Active 1953 Active 1953 -- 20052005•• RFI UnitsRFI Units

–– APTF Test Area (four bays, over 150 tanks)APTF Test Area (four bays, over 150 tanks)–– Impoundments APTFImpoundments APTF--1 and APTF1 and APTF--2 (closed)2 (closed)–– Aboveground Storage Tanks [Aboveground Storage Tanks [ASTsASTs]]

•• Structures demolished in June 2009Structures demolished in June 2009

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APTFAPTF

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HAPPY VALLEY NORTH (HVN) AND HAPPY VALLEY NORTH (HVN) AND SOUTH (HVS)SOUTH (HVS)

•• Combined 14 AcresCombined 14 Acres•• Active 1950s to 1990sActive 1950s to 1990s•• EnergeticsEnergetics and and perchlorateperchlorate used for solid propellant, gun used for solid propellant, gun

and flare testing / productionand flare testing / production•• RFI UnitsRFI Units

–– Former Building 1315 AreaFormer Building 1315 Area–– Former Building 1316/Tunnel Facility AreaFormer Building 1316/Tunnel Facility Area–– Former Building 1372 AreaFormer Building 1372 Area–– Gun Propellant Test Area, Motor Test AreaGun Propellant Test Area, Motor Test Area–– Propellant Support BuildingsPropellant Support Buildings–– Exotic Materials Test AreaExotic Materials Test Area

•• Interim removal and Interim removal and biotreatmentbiotreatment of impacted soils in of impacted soils in 1999 1999 –– 20042004

•• Structures removed, site Structures removed, site regradedregraded

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HAPPY VALLEY NORTH AND SOUTHHAPPY VALLEY NORTH AND SOUTH

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LASER ENGINEERING TEST FACILITY / LASER ENGINEERING TEST FACILITY / COMPONENT TEST LAB I (LETF/CTL1)COMPONENT TEST LAB I (LETF/CTL1)•• Approximately 8.1 acresApproximately 8.1 acres•• 19491949--20002000’’ss•• LETF LETF –– high energy fuel research, laser testinghigh energy fuel research, laser testing•• CTLCTL--1 1 ––rocket engine component testing, laser rocket engine component testing, laser

diagnostic studies, machine shopdiagnostic studies, machine shop•• RFI UnitsRFI Units

–– Laser Engineering Test FacilityLaser Engineering Test Facility–– Laser Engineering Test Facility PondLaser Engineering Test Facility Pond–– Buildings 1309 and 1317/1423 Leach FieldsBuildings 1309 and 1317/1423 Leach Fields

•• CTL1 demolition completeCTL1 demolition complete•• LETF demolition in JulyLETF demolition in July--August 2009August 2009

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LETF / CTL-1

CTL-1

LETF

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CANYON TEST AREACANYON TEST AREA•• Approximately 12.9 acres Approximately 12.9 acres •• Active from 1950Active from 1950’’s to 1970s to 1970’’ss•• Large Liquid Rocket TestingLarge Liquid Rocket Testing•• RFI UnitsRFI Units

–– Canyon Test Area (3 Test Stands)Canyon Test Area (3 Test Stands)–– Canyon Skim Pond and Retention PondCanyon Skim Pond and Retention Pond–– Canyon Groundwater Extraction/Treatment Canyon Groundwater Extraction/Treatment

SystemSystem–– Buildings 1382 and 1375 Leach FieldsBuildings 1382 and 1375 Leach Fields

•• Some small structures remainSome small structures remain

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CANYONCANYON

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CHATSWORTH FM GROUNDWATER IMPACTS

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