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Boeing Company (the) — Technical Presentation (July 2019)
70 slides from Boeing Company (the)'s technical presentation, Jul 17, 2019
Slide 1: Santa Susana Field Laboratory Public Meeting: Site-Wide Summary of Activities
SANTA SUSANA FIELD LABORATORY PUBLIC MEETING SITE-WIDE SUMMARY OF ACTIVITIES With support from July 17, 2019 SSFL Stormwater Expert Panel
Slide 2: Meeting Orientation
Meeting Orientation 2 Meeting Objectives • Provide opportunity for the Stormwater Expert Panel to provide an update on post-fire stormwater sampling results and management activities at SSFL, and respond to questions raised in a recent public survey • Provide interested members of the pubic an oppor
Slide 3: Meeting Orientation: Proposed Ground Rules
Meeting Orientation 3 Proposed Ground Rules • Please hold your questions until after the presentation • Take turns asking questions and focus your questions on topics addressed by the Stormwater Expert Panel • Please treat everyone present tonight with kindness and respect July 17, 25, 2019| 2018| S
Slide 4: Santa Susana Field Laboratory
Santa Susana Field Laboratory DTSC protects Californians and their environment from exposure to hazardous wastes by enforcing hazardous waste laws and regulations July 19, 2019 Calabasas, CA Department of Toxic Substances Control Cal/EPA
Slide 5: DTSC's Regulating Authority at SSFL
DTSC’s Regulating Authority at SSFL The Los Angeles Regional Water Quality Control Board regulates surface water leaving the Santa Susana Field Laboratory (SSFL) site through an industrial discharge permit All other media are regulated by DTSC under its Resource Conservation and Recovery Act (RC
Slide 6: DTSC Community Involvement for SSFL
DTSC Community Involvement for SSFL • View DTSC’s SSFL website: https://dtsc.ca.gov/sitecleanup/santa_susana_field_lab/ • Subscribe to the SSFL E-list • Review the Monthly SSFL Progress Report via the SSFL E-list • Request for Notification of document uploading For questions regarding SSFL and Commu
Slide 7: Outline
Outline 7 • Stormwater Expert Panel introduction • Background • SSFL Stormwater Overview • HHRA Summary • Key Questions this Year • Conclusions MS July 17, 25, 2019| 2018| SSFL Stormwater Expert Panel Public Meeting
Slide 8: Background
oe Background
Slide 9: Stormwater Expert Panel Introduction
Stormwater Expert Panel Introduction 9 • Dr. Bob Gearheart, PE, Humboldt State University • Jon Jones, PE, Wright Water Engineers • Dr. Michael Josselyn, WRA Consultants • Dr. Bob Pitt, PE, University of Alabama • Dr. Michael Stenstrom, PE, University of California, Los Angeles • Panel consultant: G
Slide 10: Panel's Ongoing Role and Scope
Panel’s Ongoing Role and Scope 10 • Independent panel formed in response to the 2007 Cease and Desist Order from the RWQCB o “…a panel to review site conditions, modeled flow, contaminants of concern, and evaluate the BMPs capable of providing the required treatment to meet the final effluent limits
Slide 11: SSFL Overview
SSFL Overview 11 • Former rocket testing and energy research facility • Industrial activities have ceased and facilities removal is underway o Nuclear energy research operations ceased in 1989 o Rocket engine testing operations ended in 2006 • Current activities include environmental monitoring/samp
Slide 12: NPDES Permit Overview
NPDES Permit Overview 12 • Stormwater discharges at SSFL are regulated by the LARWQCB through an individual NPDES permit, which requires: o Composite sampling at 12 stormwater outfalls; and o Compliance with approximately 50 Numeric Effluent Limits (NELs) – protective of both human health and aquati
Slide 13: SSFL Stormwater Overview
13 SSFL Stormwater Overview BP
Slide 14: SSFL NPDES Outfalls
SSFL NPDES Outfalls 14 Outfall Boundary BP July 17, 25, 2019| 2018| SSFL Stormwater Expert Panel Public Meeting
Slide 15: Simi Valley Calleguas Creek Tributaries Dayton Creek
Simi Valley 15 Calleguas Creek Tributaries Dayton Creek West Hills neighborhood Bell Creek Tributaries BP July 17, 25, 2019| 2018| SSFL Stormwater Expert Panel Public Meeting
Slide 16: RCRA Facility Investigation (RFI)
RCRA Facility Investigation (RFI) 16 BP July 17, 25, 2019| 2018| SSFL Stormwater Expert Panel Public Meeting
Slide 17: Structural treatment controls target RFI Areas
Structural treatment controls target RFI Areas 17 BP July 17, 25, 2019| 2018| SSFL Stormwater Expert Panel Public Meeting
Slide 18: Multi-Pronged Approach
Multi-Pronged Approach 18 • Source Controls • Treatment Controls o ISRA soil removal o Advanced stormwater o Pavement and building treatment systems (011, 018) removal o Flow-through media filters • Erosion/Sediment Controls Culvert modifications and Restoration Media filters (B1, upper lot) S
Slide 19: Northern outfalls and OF018 treated with advanced treatment system
Northern outfalls and OF018 treated with advanced treatment system Northern outfalls pumped to Silvernale pond, overflows treated by 19 Silvernale media filters Treated stormwater drains to OF002 MS July 17, 25, 2019| 2018| SSFL Stormwater Expert Panel Public Meeting
Slide 20: Outfall 018 Stormwater Treatment System
Outfall 018 Stormwater Treatment System 20 Silvernale pond on 3/26/18 MS July 17, 25, 2019| 2018| SSFL Stormwater Expert Panel Public Meeting
Slide 21: Stormwater not treated by Silvernale flows through media filters
Stormwater not treated by Silvernale treatment system flows through media filters before leaving northern outfalls 21 Outfall 003 Media Filter Outfall 006 Media Filter MS July 17, 25, 2019| 2018| SSFL Stormwater Expert Panel Public Meeting
Slide 22: BMP Strategy for 008/009 Watersheds
BMP Strategy for 008/009 Watersheds 22 Unlike other outfalls, “end of pipe” stormwater treatment was not possible here without constructing environmentally-intrusive dams. So instead a distributed, watershed-based approach was implemented. Emphases were: • 008: Source removal, erosion control, and r
Slide 23: 008/009 Distributed Approach
008/009 Distributed Approach 23 BP July 17, 25, 2019| 2018| SSFL Stormwater Expert Panel Public Meeting
Slide 24: Example 009 BMPs
Example 009 BMPs 24 12 Culvert Sedimentation Basin Modifications and Biofilter Expendable Launch Vehicle (ELV) Treatment BMP BP July 17, 25, 2019| 2018| SSFL Stormwater Expert Panel Public Meeting
Slide 25: BMP Performance: Lead
BMP Performance: Lead 25 Lead concentrations are significantly reduced for most BMP types 100 10 1 0.1 (2009-present) (2013-present) (2013-present) (2015-present) BP July 17, 25, 2019| 2018| SSFL Stormwater Expert Panel Public Meeting
Slide 26: BMP Performance: Dioxin
BMP Performance: Dioxin 26 Dioxin concentrations are significantly reduced for all BMP types 0.001 0.0001 >Q3+1.5*IQR Q3+1.5*IQR 75th percentile (Q3) 0.00001 Interquartile Range 0.000001 (IQR) Median 0.0000001 25th percentile (Q1) 0.00000001 Q1-1.5*IQR 0.000000001 (2009-present) (2013-present) (2013
Slide 27: HHRA Summary
27 HHRA Summary
Slide 28: HHRA Scope
HHRA Scope 28 • Regional Board issued Order to Boeing to conduct stormwater HHRA in response to public comment • Quantitative assessment of potential risks and hazards associated with human contact with stormwater and treated groundwater discharges from the SSFL o Other media (e.g., soil, sediment,
Slide 29: HHRA Analyzed NPDES Outfalls
HHRA Analyzed NPDES Outfalls 29 Outfall Sage Boundary 9 NASA Ranch 10 4 3 14 Boeing/DOE 12 6 7 13 5 Boeing Boeing NASA 8 18 11 2 19 1 BS July 17, 25, 2019| 2018| SSFL Stormwater Expert Panel Public Meeting
Slide 30: HHRA Approach
HHRA Approach 30 • Recreators (child/adult) were evaluated • Exposure was assumed to occur at each outfall separately • Exposure frequency – days per year of exposure connected to the flow days (1-2 days per week) • Exposure pathways o Incidental ingestion and dermal contact evaluated as primary pat
Slide 31: HHRA Findings
HHRA Findings 31 • Potential recreational exposure via incidental ingestion and dermal contact in surface water runoff exiting the SSFL via Outfalls 001, 002, 008, 009, 011, 018, and 019 are below levels of concern as established by CalEPA and USEPA (see chart on next slide). • Volatilization/inhala
Slide 32: Incremental Cancer Risk
Comparison of Lower and Upperbound Cumulative Incremental Cancer Risk Estimates by Outfall 32 1:1,000,000 8:10,000,000 Incremental Cancer Risk 6:10,000,000 4:10,000,000 2:10,000,000 1:10,000,000 * *Outfall 019 is not planned to be used for surface water discharge BS July 17, 25, 2019| 2018| SSFL Sto
Slide 33: Comparison of SSFL Stormwater with Urban Residential Stormwater
Comparison of SSFL Stormwater with 33 Urban Residential Stormwater California Mixed Urban (n=180) California Mixed Urban (n=180) BS July 17, 25, 2019| 2018| SSFL Stormwater Expert Panel Public Meeting
Slide 34: Key Questions This Year
34 Key Questions This Year How did the Woolsey Wildfire impact the site and how has Boeing responded?
Slide 35: Woolsey Wildfire Extent
Woolsey Wildfire Extent 35 • 79% of site burned MS • Outfall watersheds most impacted: o Outfall 011/001 Area IV (Boeing/DOE) o Outfall 018/002 o Outfall 008 • Last wildfire was 18 8 in 2005 (Topanga) 11 2 1 JJ July 17, 25, 2019| 2018| SSFL Stormwater Expert Panel Public Meeting
Slide 36: Woolsey Wildfire Extent
Woolsey Wildfire Extent MS 36 Wildfire perimeter JJ July 17, 25, 2019| 2018| SSFL Stormwater Expert Panel Public Meeting
Slide 37: Effects of Wildfire
Effects of Wildfire JJ 37 o Lost vegetative cover o Lost plant litter o Increased soil hydrophobicity Burned sampling station at Outfall 018 (water repellent) o Burned material including plastic sampler housing, metal platforms, batteries, HDPE pipelines, PVC fixtures, utility poles, etc. o Temporar
Slide 38: Hydrologic and Water Quality Response
Hydrologic and Water Quality Response 38 ◦ Increased runoff (frequency and volume) ◦ New pollutant sources (burned materials) ◦ Increased soil exposure and associated constituent mobilization With time these effects are diminished with vegetative regrowth and as soil infiltration characteristics ret
Slide 39: Example SSFL Response, Repairs, and Controls
Example SSFL Response, Repairs, and Controls JJ 39 • Hydromulch applied and fiber rolls installed • Burned HDPE pipelines replaced to direct runoff to storm water treatment system (SWTS) • Debris removed and ash vacuumed from burned areas • Repair and maintenance of stormwater BMPs, including SWTS,
Slide 40: Example Sediment Capture: CM-4
Example Sediment Capture: CM-4 JJ 40 Post-Wildfire sediment accumulation looking downstream toward weir boards. Today JJ July 17, 25, 2019| 2018| SSFL Stormwater Expert Panel Public Meeting
Slide 41: Key Questions This Year
41 Key Questions This Year Did lead from the shooting range impact water quality at Outfall 009?
Slide 42: Outfall 009 Shooting Range Soil Lead Hot Spots
Outfall 009 Shooting Range Soil Lead 42 Hot Spots JJ July 17, 25, 2019| 2018| SSFL Stormwater Expert Panel Public Meeting
Slide 43: Outfall 009 Shooting Range BMPs
Outfall 009 Shooting Range BMPs 43 BMPs implemented to capture sediment and particulate- bound lead from Culvert the shooting Silt Fence Modifications Fiber Rolls range Sandbag Berms Riprap Vegetation JJ July 17, 25, 2019| 2018| SSFL Stormwater Expert Panel Public Meeting
Slide 44: No Lead Exceedances at Outfall 009
No Lead Exceedances at Outfall 009 This year the lead is being contained on the site 44 6 5 4 Total Lead (ug/L) 3 2 1 0 12/1/18 1/10/19 2/19/19 Outfall 009 Lead Concentrations NPDES Permit Limit JJ July 17, 25, 2019| 2018| SSFL Stormwater Expert Panel Public Meeting
Slide 45: Key Questions This Year
45 Key Questions This Year What was the water quality of stormwater discharged this year and how does it compare to drinking water and human health-based standards?
Slide 46: Cumulative Annual Rainfall
2018-19 was a wetter than average year 46 • Eleven qualifying rain events (>0.10 inch in 24-hrs) o Three 7-day samples • Total annual rainfall 26.05 inch (vs. 16.8 inch average) 2018-2019 2015-16 (most near-average recent year) 30 Cumulative Annual Rainfall (in) 25 Woolsey Wildfire 20 = no samplea
Slide 47: 57 Total Exceedances Coincide with Burned Areas
57 Total Exceedances: Numbers Coincide with Burned Areas (Except 018 Treatment System) 47 0 OF 004 2 0 OF 006 11 1 10 27 6 The numbers show Permit limit or Benchmark exceedances at each Outfall. No number for a particular outfall implies no stormwater discharged in the 2018/19 season. Red = watershe
Slide 48: Constituents that Exceeded Human Health Based Thresholds
Constituents that Exceeded Human 48 Health Based Thresholds • 57 NPDES Exceedances • Drinking water standard o Iron (12) exceedances o Lead (9) o Gross Alpha (3) Manganese (8) o Arsenic (2) o Dioxin (6) o Nickel (1) o o Copper (5) o Zinc (3) • Fish consumption o Gross Alpha (3) standard exceedances
Slide 49: Historical Overview – NPDES Sampling All SSFL Outfalls
Historical Overview – NPDES Sampling All SSFL Outfalls Average annual rainfall (16.8 in) 2005-06 2010-11 2011-12 2012-13 2013-14 2014-15 2015-16 2016-17 2017-18 2018-19 BG July 17, 25, 2019| 2018| SSFL Stormwater Expert Panel Public Meeting
Slide 50: Historical Overview – NPDES Sampling All SSFL Outfalls
Historical Overview – NPDES Sampling All SSFL Outfalls Similar post-wildfire rain years, but substantially fewer discharges and exceedances in 2018-19 2005-06 2010-11 2011-12 2012-13 2013-14 2014-15 2015-16 2016-17 2017-18 2018-19 BG July 17, 25, 2019| 2018| SSFL Stormwater Expert Panel Public Meeti
Slide 51: Historical Overview – NPDES Sampling All SSFL Outfalls
Historical Overview – NPDES Sampling All SSFL Outfalls Similar rain years, but substantially fewer discharges and exceedances in 2017-18 2005-06 2010-11 2011-12 2012-13 2013-14 2014-15 2015-16 2016-17 2017-18 2018-19 BG July 17, 25, 2019| 2018| SSFL Stormwater Expert Panel Public Meeting
Slide 52: Historical Overview – NPDES Sampling All SSFL Outfalls
Historical Overview – NPDES Sampling All SSFL Outfalls Similar rain years, but substantially fewer discharges and exceedances in 2016-17 2005-06 2010-11 2011-12 2012-13 2013-14 2014-15 2015-16 2016-17 2017-18 2018-19 BG July 17, 25, 2019| 2018| SSFL Stormwater Expert Panel Public Meeting
Slide 53: Key Questions This Year
53 Key Questions This Year What were the sources of this year’s NPDES permit limit/benchmark exceedances?
Slide 54: Post-Wildfire Source Evaluation
Post-Wildfire Source Evaluation 54 • Potential Sources Evaluated o Soils from former operational and contaminated areas o Ash and burnt material Lines of Evidence o Hydromulch o Pavement solids Congeners o Treated wood and adjacent soils Particulate (dioxins) or o Atmospheric deposition strength rat
Slide 55: Previous studies of water quality following wildfires
Previous studies of water quality following wildfires in mostly undeveloped areas show an increase in many constituents 55 Multiplicative Increase Constituent References Pre- to Post-Fire Conc. Arsenic* 7 Burton et al., 2016 [2006 Station Fire, CA] Burton et al., 2016 [2006 Station Fire, CA]; Stein
Slide 56: Potential Dioxin Sources
Potential Dioxin Sources BP July 17, 25, 2019| 2018| SSFL Stormwater Expert Panel Public Meeting
Slide 57: Summary of Exceedance Sources
Summary of Exceedance Sources 57 Exceedance Potential Source Most metals Natural background soils, pavement solids Dioxins Pavement solids, soils near treated wood, soils from former operational areas, and burned treated wood and pipes Gross Alpha Only naturally occurring radionuclides detected Nitr
Slide 58: Key Questions This Year
58 Key Questions This Year Are there any lasting effects from the wildfire and what about the future?
Slide 59: Measured Exceedances Decreasing with Time
Number of Permit Limit and Benchmark Exceedances are Decreasing with Time 10 0 Daily Rainfall Measured Exceedances by 9 2 Daily rainfall 8 4 Area14 7 6 6 8 Outfall Outfall 5 10 001 Woolsey Wildfire 4 12 Outfall 3 14 002 2 16 1 18 Outfall 0 20 004 Outfall 006 Outfall 008 59 MJ July 17, 25, 2019| 2018
Slide 60: Stormwater Concentrations Returning to Typical Levels
Stormwater Concentrations Returning to Typical Levels 60 Outfall 008 Post-Topanga Post-Woolsey MJ July 17, 25, 2019| 2018| SSFL Stormwater Expert Panel Public Meeting
Slide 61: Stormwater Exceedances Expected to Decrease
Stormwater Exceedances Expected to 61 Decrease • Based on observed trend post-wildfires (Topanga and Woolsey), concentrations expected to decrease • Future storm discharge water quality will be closely monitored to determine if the trend of decreasing concentrations continues MJ July 17, 25, 2019| 2
Slide 62: Future Wildfires
Future Wildfires 62 • Boeing and the SWEP are developing recommendations to prepare for future wildfires • These recommendations may reduce the response time for BMP deployment and operation MJ July 17, 25, 2019| 2018| SSFL Stormwater Expert Panel Public Meeting
Slide 63: Key Questions This Year
63 Key Questions This Year What BMP and monitoring recommendations are being considered for this year’s Annual Report?
Slide 64: Preliminary BMP and Monitoring Recommendations
Preliminary BMP and Monitoring 64 Recommendations • BMP Recommendations o Stockpiling erosion controls for emergency response o Install BMPs around more treated wood poles o Repair OF011 treatment system and ready for operation o Assess feasibility of increasing pond storage and/or reconstructing OF
Slide 65: Conclusion
Conclusion 65 • The Woolsey wildfire occurred in early November, prior to much of the wet season • There was higher than usual rainfall recorded this year; this, combined with the wildfire’s affects on soils and vegetation, caused higher than usual number of stormwater runoff events at SSFL • There
Slide 66: Conclusion
Conclusion 66 • Existing stormwater treatment controls have been implemented (and repaired) to capture stormwater from contaminated areas at the site • These controls have been effective at reducing site stormwater concentrations for the constituents of concern during normal operations • NPDES permi
Slide 67: Conclusion
Conclusion 67 • Most of the exceedances occurred downstream of “buffer areas” with minimal or no historic operations (i.e., 001 and 002) or areas with a previously completed Interim Source Removal Action that addressed impacted surface soils (i.e., 008 and 009), limiting the area where the wildfire
Slide 68: Conclusion
Conclusion 68 • Most measured concentrations decreased throughout the year showing that the water quality effects of the wildfire are diminishing within a relatively short timeframe consistent with trends seen after the 2005 Topanga Wildfire • The Panel is making new BMP and monitoring recommendatio
Slide 69: Questions – Thank You
Questions 69 THANK YOU Additional Information (e.g., Annual Report, Panel Presentations, NPDES Permit, and Technical Reports): www.boeing.com/principles/environment/santa-susana MS July 17, 25, 2019| 2018| SSFL Stormwater Expert Panel Public Meeting
Slide 70: HHRA Documents Available Online
HHRA Documents Available Online 70 Revised HHRA Work Plan www.boeing.com/resources/boeingdotcom/principles/environ ment/pdf/Revised_Human_Health_Assessment_Work_Plan_SSF L.pdf Final HHRA Submitted to RWQCB www.waterboards.ca.gov/losangeles/public_notices/Boeing/20 17/16.FinalHHRAforSurfaceWaterRunof