NASA Update: SSFL Groundwater Investigation and Areas of … · NASA Update: SSFL Groundwater...

56
NASA Update: SSFL Groundwater Investigation and Areas of Impacted Groundwater (AIGs) Meeting Information Date: Thursday, January 15, 2015 Time: 9:00 - 11:30 AM Location: DTSC Regional Office, Chatsworth Agenda 9:00 AM - 9:05 AM Introduction and Ground Rules Paul Carpenter. DTSC 9:05 AM - 9:20 AM 2015 NASA Milestones and Schedule Peter Zorba, NASA 9:20 AM - 11:00 AM NASA AIG Program Presentation (Technical questions between sections) SSFL Background and Site History Technical Focus Areas Downhole Logging and Testing Aquifer Testing Passive Soil Gas Sampling AIG Work Plans Jason Glasgow, CH2MHill Peter Lawson, CH2MHill Mike Singer, CH2MHill Peter Lawson, CH2MHill Jim Hartley, CH2MHill Peter Lawson, CH2MHill 11:00 AM - 11:30 AM Floor Open for Questions 11:30 AM Meeting Adjourns _______________________________________________________________________________ NASA Area of Impacted Groundwater (AIG) Work Plans are posted at the DTSC SSFL website at: www.dtsc.ca.gov/SiteCleanup/Santa_Susana_Field_Lab/ under: Document Library / RCRA Facility Investigation – Groundwater / Work Plans Send written or verbal comments or questions on the NASA (AIG) work plans by April 1, 2015 to: Paul Carpenter, Sr. Engineering Geologist Department of Toxic Substances Control 8800 Cal Center Drive Sacramento CA 95826 email: [email protected] phone: (916) 255-3691

Transcript of NASA Update: SSFL Groundwater Investigation and Areas of … · NASA Update: SSFL Groundwater...

Page 1: NASA Update: SSFL Groundwater Investigation and Areas of … · NASA Update: SSFL Groundwater Investigation and Areas of Impacted Groundwater (AIGs) Meeting Information Date: Thursday,

NASA Update: SSFL Groundwater Investigation and Areas of Impacted Groundwater (AIGs)

Meeting Information Date: Thursday, January 15, 2015 Time: 9:00 - 11:30 AM Location: DTSC Regional Office, Chatsworth Agenda 9:00 AM - 9:05 AM Introduction and Ground Rules Paul Carpenter. DTSC 9:05 AM - 9:20 AM 2015 NASA Milestones and Schedule Peter Zorba, NASA 9:20 AM - 11:00 AM

NASA AIG Program Presentation (Technical questions between sections)

SSFL Background and Site History

Technical Focus Areas

Downhole Logging and Testing

Aquifer Testing Passive Soil Gas Sampling

AIG Work Plans

Jason Glasgow, CH2MHill

Peter Lawson, CH2MHill

Mike Singer, CH2MHill

Peter Lawson, CH2MHill

Jim Hartley, CH2MHill

Peter Lawson, CH2MHill

11:00 AM - 11:30 AM

Floor Open for Questions

11:30 AM

Meeting Adjourns

_______________________________________________________________________________ NASA Area of Impacted Groundwater (AIG) Work Plans are posted at the DTSC SSFL website at:

www.dtsc.ca.gov/SiteCleanup/Santa_Susana_Field_Lab/

under: Document Library / RCRA Facility Investigation – Groundwater / Work Plans Send written or verbal comments or questions on the NASA (AIG) work plans by April 1, 2015 to:

Paul Carpenter, Sr. Engineering Geologist Department of Toxic Substances Control 8800 Cal Center Drive Sacramento CA 95826 email: [email protected] phone: (916) 255-3691

Page 2: NASA Update: SSFL Groundwater Investigation and Areas of … · NASA Update: SSFL Groundwater Investigation and Areas of Impacted Groundwater (AIGs) Meeting Information Date: Thursday,

Santa Susana Field Laboratory Acronym Field Guide  DTSC/NASA Meeting January 15, 2015   AIG    Area of Impacted Groundwater ASTs                     Above‐ground Storage Tank(s) AOC                     Administrative Order on Consent AP                       Ash Pile BE    Bedrock Vapor Extraction CMS    Corrective Measures Study cy                         Cubic Yards DTSC                   Department of Toxic Substances Control ELV                      Expendable Launch Vehicle FSP                      Field Sampling Plan GIS                    Geographic Information System ISRA                   Interim Soil Removal Action JP‐4                  Jet Propellant‐4 [kerosene‐gasoline mix] LOX Plant      Liquid Oxygen Plant LUT    Lookup Table NASA                   National Aeronautics and Space Administration NFA                    No Further Action NPDES                National Pollutant Discharge Elimination System PCB                     Polychlorinated Biphenyl PLF    Propellant Loading Facility PRA    Preliminary Remediation Area PSA    Potential Source Area [for groundwater contamination] R2 Pond(s)         Derivation Uncertain. Possibly “reservoir” or “retention” pond RCRA                   Resource Conservation and Recovery Act RD                       Well name prefix  RJ‐1                     Ramjet‐1 (a fuel) RP‐1                   Rocket Propellant‐1 [standard kerosene rocket fuel] SPA                      Storable Propellant Area STP                       Sewage Treatment Plant SVOCs                 Semi‐volatile Organic Compounds TCA                      1,1,1‐TCA: 1,1,1‐Trichloroethane TCE                      Trichlorethlene TPH                      Total Petroleum Hydrocarbons   USEFF                 Universal Space Engine Flow Facility UT or UST           Underground tank/Underground storage tank UST SW              Underground Storage Tank, Southwest  UV                       Ultraviolet VCEHD                 Ventura County Environmental Health Division VOCs                    Volatile Organic Compounds SWMU                Solid Waste Management Unit WS‐SP                 Water Supply‐Swimming Pool  Test Stands on federal property:  Alfa, Bravo, Coco and Delta (all Delta stands have been demolished)  

Page 3: NASA Update: SSFL Groundwater Investigation and Areas of … · NASA Update: SSFL Groundwater Investigation and Areas of Impacted Groundwater (AIGs) Meeting Information Date: Thursday,

1/20/2015

1

January 15, 2014

Dial In:1-844-467-6272 Pass Code: 670462#

Paul Carpenter/DTSC

Page 4: NASA Update: SSFL Groundwater Investigation and Areas of … · NASA Update: SSFL Groundwater Investigation and Areas of Impacted Groundwater (AIGs) Meeting Information Date: Thursday,

1/20/2015

2

Introduction (DTSC)

NASA 2015 Milestones and Schedule (NASA)

NASA Area of Impacted Groundwater Investigation Technical Presentation (NASA)

Open Floor Questions

Please: Silence all mobile phones, tablets and electronics. Limit cross conversation during the meeting. Treat other people with the same level of respect

you expect from others. Photography, sound and video recording may occur

during this meeting. If you do not wish to be filmed or photographed, please inform the photographer/videographer directly.

Hold all questions until the designated question and answer periods and the open session at the end of the presentations.

Page 5: NASA Update: SSFL Groundwater Investigation and Areas of … · NASA Update: SSFL Groundwater Investigation and Areas of Impacted Groundwater (AIGs) Meeting Information Date: Thursday,

1/20/2015

3

NASA Activities Regulated By DTSC Under Resource Conservation and Recovery Act (RCRA) Corrective Action Process

• Soils through the 2010 DTSC-NASA Administrative Order on Consent (AOC)

• Groundwater through the 2007 Consent Order for Corrective Action

INVESTIGATION REMEDY SELECTION CLEANUP

Pete Zorba/NASA

Page 6: NASA Update: SSFL Groundwater Investigation and Areas of … · NASA Update: SSFL Groundwater Investigation and Areas of Impacted Groundwater (AIGs) Meeting Information Date: Thursday,

1/20/2015

4

Areas of Impacted Groundwater (AIGs) Characterization Work Plan◦ Characterization Plans to complete NASA’s

groundwater investigation◦ Focus on subgroups in NASA AIGs◦ Collaborative development process◦ Aggressive schedule

7

Jason Glasgow/CH2MHILL

Page 7: NASA Update: SSFL Groundwater Investigation and Areas of … · NASA Update: SSFL Groundwater Investigation and Areas of Impacted Groundwater (AIGs) Meeting Information Date: Thursday,

1/20/2015

5

PSA 1 –Northwest portion of former LOX Plant

PSA 2 – Near the cold box on LOX manufacturing line 3.

Note: Square indicates soil or soil vapor sample collected for VOC analyses. Red and yellow squares indicate potential source of VOCs

Page 8: NASA Update: SSFL Groundwater Investigation and Areas of … · NASA Update: SSFL Groundwater Investigation and Areas of Impacted Groundwater (AIGs) Meeting Information Date: Thursday,

1/20/2015

6

The LOX Plant was constructed in 1955 and operated through 1971.

Four – 75 ton/day LOX Generators

LOX Storage and Distribution

LOX Plant Equipment Cleaning

◦ “LOX Clean” is a standard for tanks and pipelines allowed virtually no oils or grease to be present on the metal

◦ TCE (and/or potentially Freon) was used to clean tanks and pipelines

Page 9: NASA Update: SSFL Groundwater Investigation and Areas of … · NASA Update: SSFL Groundwater Investigation and Areas of Impacted Groundwater (AIGs) Meeting Information Date: Thursday,

1/20/2015

7

PSA 1 – B203 PSA 2 – Ash

Pile / STP PSA 3 – B205 PSA 4 – B204 PSA 5 – B206

Note: Square indicates soil or soil vapor sample collected for VOC analyses. Red and yellow squares indicate potential source of VOCs

Instrument Laboratory, and Lasers Lab Facility used by LEOS including an equipment cleaning area

Service Building including tinning, degreasing, sand blasting, and welding

Former oil storage area

Page 10: NASA Update: SSFL Groundwater Investigation and Areas of … · NASA Update: SSFL Groundwater Investigation and Areas of Impacted Groundwater (AIGs) Meeting Information Date: Thursday,

1/20/2015

8

The incinerator (Building 2758) and incinerator platform (Building 2758A) were operational from the mid-1950s through the 1970s.

The incinerator was demolished in 2006.

Used for burning nonhazardous wastes such as paper, photographs, and trash.

◦ The ash pile was approximately 35 feet long, 15 feet wide, and 2 feet high.

◦ The ash pile and underlying soil were removed in 1993.

◦ Ash Pile Debris Area has ash and debris from incinerator operations Metal buckets and piping Asphalt

Page 11: NASA Update: SSFL Groundwater Investigation and Areas of … · NASA Update: SSFL Groundwater Investigation and Areas of Impacted Groundwater (AIGs) Meeting Information Date: Thursday,

1/20/2015

9

◦ The Sewage Treatment Plant (STP) was operational from 1961 to 1987 and is now inactive. Received cooling water and sewage from ELV area and

Alfa/Bravo Test Areas. The treatment system is below grade and concrete-lined. The sludge was stored in the former septic tanks and taken

offsite for disposal. The treated water was pumped to a drainage ditch that

flows to the Silvernale Reservoir.

B205 – Former paint shop B204 – Maintenance building◦ Vehicle repair◦ Machine shop◦ Painting operations

Page 12: NASA Update: SSFL Groundwater Investigation and Areas of … · NASA Update: SSFL Groundwater Investigation and Areas of Impacted Groundwater (AIGs) Meeting Information Date: Thursday,

1/20/2015

10

ELV Final Assembly Building 206◦ Test bays◦ Sumps◦ Drum storage

area◦ Catchment pond◦ Painting◦ Metal plating

Machine and welding shop

Component Testing

PSA 1 and 2 – SPA PSA 3 – Alfa PSA 4 – Bravo PSA 5 – WS09 – former GW treatment and pre-test

building PSA – 6 - ABFF

Page 13: NASA Update: SSFL Groundwater Investigation and Areas of … · NASA Update: SSFL Groundwater Investigation and Areas of Impacted Groundwater (AIGs) Meeting Information Date: Thursday,

1/20/2015

11

Oxidizer Storage on east side

Fuel storage on west side

Drum washing rack Impoundments 1

and 2SPA Impoundment No. 1

Drum Washing Area Location of SPA Impoundment

No. 2

Engines tested include:◦ Atlas◦ Thor◦ Navaho◦ Jupiter◦ Delta (RS-27

and RS-27A)

Page 14: NASA Update: SSFL Groundwater Investigation and Areas of … · NASA Update: SSFL Groundwater Investigation and Areas of Impacted Groundwater (AIGs) Meeting Information Date: Thursday,

1/20/2015

12

Alfa Test Stands◦ Three test stands

(B2727, B2728, B2729) Electrical control shacks Fuel filters and run

tanks Fuel dump lines TCE storage, sinks, and

capture system Hydraulic system Lubrication system

(grease)

Alfa ditch received discharges◦ Deluge Water◦ TCE◦ Fuels

Page 15: NASA Update: SSFL Groundwater Investigation and Areas of … · NASA Update: SSFL Groundwater Investigation and Areas of Impacted Groundwater (AIGs) Meeting Information Date: Thursday,

1/20/2015

13

Alfa skim pond -> Alfa/Bravo skim pond-> Silvernale -> R-2 Pond

Engines tested include:◦ Atlas◦ Vernier

Page 16: NASA Update: SSFL Groundwater Investigation and Areas of … · NASA Update: SSFL Groundwater Investigation and Areas of Impacted Groundwater (AIGs) Meeting Information Date: Thursday,

1/20/2015

14

Bravo Test Stands◦ Three test stands

(B2730, B2731, B2732) Electrical control

shacks Fuel filters and run

tanks Fuel dump lines TCE storage, sinks,

and capture system Hydraulic system Lubrication system

(grease)

Bravo skim pond -> Alfa/Bravo skim pond-> Silvernale -> R-2 Pond

Page 17: NASA Update: SSFL Groundwater Investigation and Areas of … · NASA Update: SSFL Groundwater Investigation and Areas of Impacted Groundwater (AIGs) Meeting Information Date: Thursday,

1/20/2015

15

Pretest shop◦ Used to prepare

engines and test stands for testing operations◦ Tool crib – housed

tools needed Machine shop

area GW air stripping system for WS09

1.6 acres in size and was built in 1955

Five aboveground storage tanks (ASTs)◦ 33,000 gallon tanks (2)◦ 10,000 gallon tanks (3)◦ Above and below ground

pipelines to Alfa and Bravo Test Stands

◦ Pumps◦ Secondary containment

system with a storm water overflow basin

The tanks contained Rocket Propellant (RP)-1 and Ram Jet (RJ)-1 (both highly refined kerosene)

Page 18: NASA Update: SSFL Groundwater Investigation and Areas of … · NASA Update: SSFL Groundwater Investigation and Areas of Impacted Groundwater (AIGs) Meeting Information Date: Thursday,

1/20/2015

16

PSA 1– Coca PSA 2 – R2 Ponds PSA 3 – Delta PSA 4 – Delta

Pre-test Building

Engines tested include:◦ Atlas◦ Navajo◦ J-2 (Jupiter)◦ Saturn◦ Space Shuttle

Main Engine

Page 19: NASA Update: SSFL Groundwater Investigation and Areas of … · NASA Update: SSFL Groundwater Investigation and Areas of Impacted Groundwater (AIGs) Meeting Information Date: Thursday,

1/20/2015

17

Coca Test Stands◦ Four test stands

(B2733, B2734, B2735, B2787) Electrical control

shacks Fuel filters and run

tanks Fuel dump lines TCE storage, sinks,

and capture system Hydraulic system Lubrication system

(grease)

Coca ditch received discharges◦ Deluge Water◦ TCE◦ Fuels

Page 20: NASA Update: SSFL Groundwater Investigation and Areas of … · NASA Update: SSFL Groundwater Investigation and Areas of Impacted Groundwater (AIGs) Meeting Information Date: Thursday,

1/20/2015

18

The R-2 Ponds have been active since 1958.

Collection point for drainages associated with Areas II and III, and portions of Area IV.

Engines tested include:◦ J-2 (Jupiter)◦ X-1◦ E-1◦ X-4◦ Linear Aerospike◦ Lance◦ Atlas

Page 21: NASA Update: SSFL Groundwater Investigation and Areas of … · NASA Update: SSFL Groundwater Investigation and Areas of Impacted Groundwater (AIGs) Meeting Information Date: Thursday,

1/20/2015

19

Delta Test Stands◦ Three test stands

(B2736, B2737, B2738) Electrical control

shacks Fuel filters and run

tanks Fuel dump lines TCE storage, sinks,

and capture system

Hydraulic system Lubrication system

(grease)

Delta pond received discharges◦ Deluge Water◦ TCE◦ Fuels

Page 22: NASA Update: SSFL Groundwater Investigation and Areas of … · NASA Update: SSFL Groundwater Investigation and Areas of Impacted Groundwater (AIGs) Meeting Information Date: Thursday,

1/20/2015

20

Pretest Shop was used to prepare engines and test stands for testing operations, and modify parts of the test stands for various test and engine configurations

Peter Lawson/CH2MHILL

Page 23: NASA Update: SSFL Groundwater Investigation and Areas of … · NASA Update: SSFL Groundwater Investigation and Areas of Impacted Groundwater (AIGs) Meeting Information Date: Thursday,

1/20/2015

21

Structural Geology – Mike Singer Aquifer Testing – Peter Lawson Passive Soil Gas – Jim Hartley

Evaluate existing data for each AIG Develop conceptual site models for:◦ Structural geology◦ Hydrogeology◦ Contaminant transport

Identify remaining data gaps for site characterization

Propose field activities to fill data gaps

Page 24: NASA Update: SSFL Groundwater Investigation and Areas of … · NASA Update: SSFL Groundwater Investigation and Areas of Impacted Groundwater (AIGs) Meeting Information Date: Thursday,

1/20/2015

22

Mike Singer/CH2M HILL

Bedrock at SSFL is dipping, faulted, and highly-fractured

Most groundwater flow occurs in discrete fractures and faults in bedrock

These can be difficult to identify and characterize

Downhole data will be used to better understand groundwater flow and help make decisions about long-term strategies

Page 25: NASA Update: SSFL Groundwater Investigation and Areas of … · NASA Update: SSFL Groundwater Investigation and Areas of Impacted Groundwater (AIGs) Meeting Information Date: Thursday,

1/20/2015

23

Acoustic & optical televiewer Caliper Conductivity, specific conductivity, and resistivity

Temperature Natural gamma ray and gamma ray

Spontaneous potential Packer testing◦ Ultimately leads to well designs at most locations

Identifies groundwater flow zones in subsurface

Also shows vertical flow direction inside the borehole – useful for understanding hydraulic relationships in the system

Data from flow meter testing used to select packer testing intervals (select intervals with active groundwater flow)

Page 26: NASA Update: SSFL Groundwater Investigation and Areas of … · NASA Update: SSFL Groundwater Investigation and Areas of Impacted Groundwater (AIGs) Meeting Information Date: Thursday,

1/20/2015

24

Source: https://water.usgs.gov/ogw/bgas/flowmeter/

Corehole-Dynamic Flow Meter uses measures electric current induced by flowing water to estimate vertical flow in borehole

CDFM can measure flows from 0.02 – 10 gallons/minute

Sample flowmeter data from borehole in fractured-rock aquifer.

Arrows indicate interpreted direction of flow, as fluid moves from zones of higher head to lower head.

Provides complete image of borehole wall

Fractures and different strata can be identified

Both acoustic and optical (shown here) surveys being employed at SSFL

Page 27: NASA Update: SSFL Groundwater Investigation and Areas of … · NASA Update: SSFL Groundwater Investigation and Areas of Impacted Groundwater (AIGs) Meeting Information Date: Thursday,

1/20/2015

25

Example from LOX Shows bedding-

plane fracture

Fracture parallel to bedding plan

at LOX

NS

Page 28: NASA Update: SSFL Groundwater Investigation and Areas of … · NASA Update: SSFL Groundwater Investigation and Areas of Impacted Groundwater (AIGs) Meeting Information Date: Thursday,

1/20/2015

26

Gives reliable estimate of hydraulic conditions for specified intervals

Provides information on extent and connectivity of fracturing at the corehole

Also provides a way to collect reliable depth-discrete groundwater samples

Schematic diagram showing a typical modern straddle packer installed in a well

Provides estimates of hydraulic conductivity (K) of test interval

Also allows groundwater samples to be collected from specified depths

Source: Stewart, 2000

Page 29: NASA Update: SSFL Groundwater Investigation and Areas of … · NASA Update: SSFL Groundwater Investigation and Areas of Impacted Groundwater (AIGs) Meeting Information Date: Thursday,

1/20/2015

27

Confirm previous mapping

Locations of shale, faults, deformation bands

Results will be combined with subsurface geophysical data to revise conceptual model

How groundwater flows

Connectivity of fracture systems

Impact of faults on contaminant transport

Help identify groundwater remediation strategies

Page 30: NASA Update: SSFL Groundwater Investigation and Areas of … · NASA Update: SSFL Groundwater Investigation and Areas of Impacted Groundwater (AIGs) Meeting Information Date: Thursday,

1/20/2015

28

Peter Lawson/CH2M HILL

Aquifer injection testing is a methodology used to quantify the hydraulic properties of the subsurface

At SSFL, the major focus of aquifer testing is to determine the properties of the fault systems at the site

Faults can act both as barriers and pathways for groundwater flow

The properties of a particular fault can have a large impact on contaminant migration

Page 31: NASA Update: SSFL Groundwater Investigation and Areas of … · NASA Update: SSFL Groundwater Investigation and Areas of Impacted Groundwater (AIGs) Meeting Information Date: Thursday,

1/20/2015

29

Injection testing consists of injecting clean water into a corehole and measuring the rise in groundwater levels in surrounding wells

Sensitive measuring devices in nearby monitoring wells can detect small changes in water levels over time

The amount, timing, and distribution of the water level changes provides information to estimate the properties of the nearby faults and the surrounding aquifer system

Page 32: NASA Update: SSFL Groundwater Investigation and Areas of … · NASA Update: SSFL Groundwater Investigation and Areas of Impacted Groundwater (AIGs) Meeting Information Date: Thursday,

1/20/2015

30

Coca/Delta AIG

Jim Hartley/CH2M HILL

Page 33: NASA Update: SSFL Groundwater Investigation and Areas of … · NASA Update: SSFL Groundwater Investigation and Areas of Impacted Groundwater (AIGs) Meeting Information Date: Thursday,

1/20/2015

31

A sensitive, rapid contaminant location screening method

We use it to find where contaminants are, and where they’re not

We use it to confirm the best spot for more expensive bedrock wells

Diffusion is key: ultra-trace levels of volatile chemicals can be distributed for hundreds or thousands of feet around a concentrated zone

The surface distribution of these chemicals reflects the strength of their origin at depth

Though the chemicals are only present at ultra-trace levels, we can collect samples by using ultra-clean, laboratory-grade sorbent gels

Page 34: NASA Update: SSFL Groundwater Investigation and Areas of … · NASA Update: SSFL Groundwater Investigation and Areas of Impacted Groundwater (AIGs) Meeting Information Date: Thursday,

1/20/2015

32

A single multi-point survey can cover a wide area for a fraction of the cost of a single well

Detection limits found to be 1000x more sensitive than conventional methods

Probes are placed in the ground for two weeks, and then analyzed

Results of adjacent probes are combined statistically to create a map

Page 35: NASA Update: SSFL Groundwater Investigation and Areas of … · NASA Update: SSFL Groundwater Investigation and Areas of Impacted Groundwater (AIGs) Meeting Information Date: Thursday,

1/20/2015

33

Peter Lawson/CH2M HILL

Page 36: NASA Update: SSFL Groundwater Investigation and Areas of … · NASA Update: SSFL Groundwater Investigation and Areas of Impacted Groundwater (AIGs) Meeting Information Date: Thursday,

1/20/2015

34

LOX Plant

B204 / ELV

Coca / Delta

Alfa / Bravo

2015 2016 2017

Groundwater RFI Report

CMS Report

Janu

ary

2015

2014

Peter Lawson/CH2M HILL

Page 37: NASA Update: SSFL Groundwater Investigation and Areas of … · NASA Update: SSFL Groundwater Investigation and Areas of Impacted Groundwater (AIGs) Meeting Information Date: Thursday,

1/20/2015

35

The primary data gap at LOX is to better understand the mass of contamination above the water table

The following approach was developed to fill that data gap:◦ Passive soil vapor sampling used to map the initial

distribution of contamination◦ Vapor extraction then performed to remove a

portion of that mass◦ Subsequent soil vapor sampling performed to

measure differences from pre-pumping levels◦ The remaining mass in the soil profile estimated

Understanding the mass of contamination in the soil profile is important as it helps determine whether a threat to groundwater quality exists

Page 38: NASA Update: SSFL Groundwater Investigation and Areas of … · NASA Update: SSFL Groundwater Investigation and Areas of Impacted Groundwater (AIGs) Meeting Information Date: Thursday,

1/20/2015

36

Page 39: NASA Update: SSFL Groundwater Investigation and Areas of … · NASA Update: SSFL Groundwater Investigation and Areas of Impacted Groundwater (AIGs) Meeting Information Date: Thursday,

1/20/2015

37

BSL = Below Groundwater Screening Level

?

?

?

Page 40: NASA Update: SSFL Groundwater Investigation and Areas of … · NASA Update: SSFL Groundwater Investigation and Areas of Impacted Groundwater (AIGs) Meeting Information Date: Thursday,

1/20/2015

38

Page 41: NASA Update: SSFL Groundwater Investigation and Areas of … · NASA Update: SSFL Groundwater Investigation and Areas of Impacted Groundwater (AIGs) Meeting Information Date: Thursday,

1/20/2015

39

Potential Aquifer Testing Location

Page 42: NASA Update: SSFL Groundwater Investigation and Areas of … · NASA Update: SSFL Groundwater Investigation and Areas of Impacted Groundwater (AIGs) Meeting Information Date: Thursday,

1/20/2015

40

Peter Lawson/CH2M HILL

The main focus at B204/ELV is to achieve delineation of multiple source areas and to determine the nature of the North Fault Zone

The North Fault Zone may act as a barrier or a conduit to groundwater and contaminant flow

Plumes will be further delineated by drilling additional monitoring wells

The fault properties will be estimated by conducting aquifer testing at several locations

Page 43: NASA Update: SSFL Groundwater Investigation and Areas of … · NASA Update: SSFL Groundwater Investigation and Areas of Impacted Groundwater (AIGs) Meeting Information Date: Thursday,

1/20/2015

41

Page 44: NASA Update: SSFL Groundwater Investigation and Areas of … · NASA Update: SSFL Groundwater Investigation and Areas of Impacted Groundwater (AIGs) Meeting Information Date: Thursday,

1/20/2015

42

Page 45: NASA Update: SSFL Groundwater Investigation and Areas of … · NASA Update: SSFL Groundwater Investigation and Areas of Impacted Groundwater (AIGs) Meeting Information Date: Thursday,

1/20/2015

43

Passive Soil Gas Sampler Array

Potential Aquifer Testing Location

Page 46: NASA Update: SSFL Groundwater Investigation and Areas of … · NASA Update: SSFL Groundwater Investigation and Areas of Impacted Groundwater (AIGs) Meeting Information Date: Thursday,

1/20/2015

44

Peter Lawson/CH2M HILL

The main focus is to better understand the nature of the flow systems and contaminant movement north and south of the Shale 2 member

North of Shale 2 the shallow and deep groundwater systems are fully connected

South of Shale 2 the shallow groundwater is perched 150 ft above the deeper groundwater

These differences affect the potential for contaminant movement at the site

Page 47: NASA Update: SSFL Groundwater Investigation and Areas of … · NASA Update: SSFL Groundwater Investigation and Areas of Impacted Groundwater (AIGs) Meeting Information Date: Thursday,

1/20/2015

45

Page 48: NASA Update: SSFL Groundwater Investigation and Areas of … · NASA Update: SSFL Groundwater Investigation and Areas of Impacted Groundwater (AIGs) Meeting Information Date: Thursday,

1/20/2015

46

Page 49: NASA Update: SSFL Groundwater Investigation and Areas of … · NASA Update: SSFL Groundwater Investigation and Areas of Impacted Groundwater (AIGs) Meeting Information Date: Thursday,

1/20/2015

47

Will Deepen Existing Corehole

Page 50: NASA Update: SSFL Groundwater Investigation and Areas of … · NASA Update: SSFL Groundwater Investigation and Areas of Impacted Groundwater (AIGs) Meeting Information Date: Thursday,

1/20/2015

48

Potential Aquifer Testing Location

Peter Lawson/CH2M HILL

Page 51: NASA Update: SSFL Groundwater Investigation and Areas of … · NASA Update: SSFL Groundwater Investigation and Areas of Impacted Groundwater (AIGs) Meeting Information Date: Thursday,

1/20/2015

49

Potential off-site migration of contamination is a concern at this site due to the proximity to the southern SSFL boundary

Potential migration pathways are different in the shallow and deep groundwater systems –additional wells proposed to better define these pathways

The Burro Flats Fault appears to act as a barrier to off-site contaminant migration

Data collection proposed to better define fault properties

Page 52: NASA Update: SSFL Groundwater Investigation and Areas of … · NASA Update: SSFL Groundwater Investigation and Areas of Impacted Groundwater (AIGs) Meeting Information Date: Thursday,

1/20/2015

50

Page 53: NASA Update: SSFL Groundwater Investigation and Areas of … · NASA Update: SSFL Groundwater Investigation and Areas of Impacted Groundwater (AIGs) Meeting Information Date: Thursday,

1/20/2015

51

Page 54: NASA Update: SSFL Groundwater Investigation and Areas of … · NASA Update: SSFL Groundwater Investigation and Areas of Impacted Groundwater (AIGs) Meeting Information Date: Thursday,

1/20/2015

52

Coca/Delta Passive Soil Gas Surveys

Transect 4

Delta Test Stand Support Area

Coca SkimPond

Draft results; coordinate confirmation pending

Page 55: NASA Update: SSFL Groundwater Investigation and Areas of … · NASA Update: SSFL Groundwater Investigation and Areas of Impacted Groundwater (AIGs) Meeting Information Date: Thursday,

1/20/2015

53

Potential Aquifer Testing Location

Page 56: NASA Update: SSFL Groundwater Investigation and Areas of … · NASA Update: SSFL Groundwater Investigation and Areas of Impacted Groundwater (AIGs) Meeting Information Date: Thursday,

1/20/2015

54

Website: www.dtsc.ca.gov/SiteCleanup/Santa_Susana_Field_Lab

Send written or verbal comments on the NASA AIG Work Plans by April 1, 2015 to:

Paul Carpenter, Sr. Engineering GeologistDepartment of Toxic Substances Control8800 Cal Center DriveSacramento, California 95826

Email: [email protected]: (916) 255-3691