FIGURE 1-4

BOEING PROPERTYAREA I

MCRA / Sage Ranch

A1LFIEL

LETF

APTF

B1

B359

HVN

IEL-3AILF-2

AILF-1IEL-2

B1-2

CTLI-1A

CTLI-1B

B1-1A

B1-1B

B1-1C

B1-1D

IEL-1

CTLI-2

IEL-6

IEL-4IEL-5

CM6CM8

CM7

CM9

CM11

No samples shown on MCRA/ Sage Ranch and within theNorthern Drainage, because there are ongoing clean-up

activities being performed under DTSC oversight.

Remedial action at CMs will be evaluated aspart of the Performance Monitoring Program

Outfall-014I1 inch = 300 feet

Base Map LegendAdministrative AreaBoundaryRFI Site BoundarySoil Borrow Area

!( NPDES OutfallSurface Water DivideDrainage

Non JurisdictionalSurface Water PathwayPrevious Excavation AreaA/C PavingDirt RoadElevation Contour

0 300 600Feet

ISRA AreasEastern Outfall 009 Watershed

S A N T A S U S A N A F I E L D L A B O R A T O R Y FIGURE 1-5

Path: T:\projects\rock3\ISRA\Figures\Outfall-009\Dotmap_East_Pre_11x17.mxdDate: 4/29/2011

Figure LegendActual excavation boundariesISRA Areas completed in 2009Planned excavation boundariesISRA Areas completed in 2010ISRA Areas planned for future remediationISRA PEAs not planned for future remediation

Chemical Data LegendDioxin Sample Locations (< 2 feet bgs)

") ≤ SRG") > SRG and < 2x SRG") ≥ 2x SRG and < 10 x SRG") ≥ 10x SRG

Metal Sample Locations (< 2 feet bgs)!( ≤ SRG!( > SRG and < 2x SRG!( ≥ 2x SRG and < 10 x SRG!( ≥ 10x SRG

Figure Notes:1. Implementation at 2009 ISRA areas was described in theISRA Phase I Implementation Report (MWH, 2009).2. PEA-CTLI-2, PEA-IEL-4, PEA-IEL-5, and PEA-IEL-6 underwenta contaminant migration potential evaluation based on chemicaland physical characteristics in the 2010 Work Plan Addendum(MWH, 2010), with a resulting low rank, and therefore were notconsidered ISRA areas and were not carried forward for theremedial alternatives evaluation.3. Aerial imagery and topographic contours were collectedJune 2, 2010 by Sage Consultants, Inc., and representpre-excavation conditions.

ISRA COCs/SRGsCadmium: 1 mg/kgCopper: 29 mg/kgLead: 34 mg/kgMercury: 0.09 mg/kgDioxin: 3.0 pg/g

NASA PROPERTYAREA I

NASA PROPERTYAREA II BOEING PROPERTY

AREA I

UNDEVELOPEDLAND

ELV

Area IILandfill

B515 STP

Ash Pile

ABFF

AlfaSPA

Bravo

HWSA

LOX

B211Leach Field

B208Leach Field

B212Leach Field

B217LeachField

B213Leach Field

Alfa BravoSkim Pond

SPA 1 Impoundment

SPA 2Impoundment

HWCT

CM6

No samples shown on MCRA/ Sage Ranch and within theNorthern Drainage, because there are ongoing clean-up

activities being performed under DTSC oversight.

Remedial action at CMs will beevaluated as part of the Performance

Monitoring Program

Soil Borrow Area

ELV-1C

ELV-1D

AP/STP-1B

LOX-1A

AP/STP-1C-1

AP/STP-1C-2

AP/STP-1E-1AP/STP-1E-2

AP/STP-1E-3

LOX-1B-2

LOX-1B-1

LOX-1B-4

LOX-1DA2LF2-2B

A2LF2-2A

LOX-1C

LOX-1B-3

AP/STP-1D

AP/STP-1A

AP/STP-1F

A2LF-1

A2LF-3CM2

CM3 CM4

CM1

CM10

Outfall-009

Outfall-015

Outfall-012

Outfall-013I

1 inch = 400 feet

Base Map LegendAdministrative AreaBoundaryRFI Site BoundarySoil Borrow Area

!( NPDES OutfallSurface Water DivideDrainage

Non JurisdictionalSurface Water PathwayPrevious Excavation AreaA/C PavingDirt RoadElevation Contour

0 400 800Feet

ISRA AreasWestern Outfall 009 Watershed

S A N T A S U S A N A F I E L D L A B O R A T O R Y FIGURE 1-6

Path: T:\projects\rock3\ISRA\Figures\Outfall-009\Dotmap_West_Pre_11x17.mxdDate: 4/29/2011

Figure LegendActual excavation boundariesISRA Areas completed in 2009Planned excavation boundariesISRA Areas completed in 2010ISRA Areas planned for future remediationISRA PEAs not planned for future remediation

Chemical Data LegendDioxin Sample Locations (< 2 feet bgs)

") ≤ SRG") > SRG and < 2x SRG") ≥ 2x SRG and < 10 x SRG") ≥ 10x SRG

Metal Sample Locations (< 2 feet bgs)!( ≤ SRG!( > SRG and < 2x SRG!( ≥ 2x SRG and < 10 x SRG!( ≥ 10x SRG

Figure Notes:1. Implementation at 2009 ISRA areas was described in theISRA Phase I Implementation Report (MWH, 2009).2. PEA-CTLI-2, PEA-IEL-4, PEA-IEL-5, and PEA-IEL-6 underwenta contaminant migration potential evaluation based on chemicaland physical characteristics in the 2010 Work Plan Addendum(MWH, 2010), with a resulting low rank, and therefore were notconsidered ISRA areas and were not carried forward for theremedial alternatives evaluation.3. Aerial imagery and topographic contours were collectedJune 2, 2010 by Sage Consultants, Inc., and representpre-excavation conditions.

ISRA COCs/SRGsCadmium: 1 mg/kgCopper: 29 mg/kgLead: 34 mg/kgMercury: 0.09 mg/kgDioxin: 3.0 pg/g