# Final Finding ofSuitabilityto Transfer#4 for Carve-OutsI-B, I-E,I-G,I-H, I-I, I-J, I-L, I-M, I-P, II-G, II-I, II-P, and III-D FormerMarine CorpsAirStation EI Toro, California

January2009
DCN: ECS-1013-0000-0105

# J:":J 30

## 2009 

# CYPRESSJanuary2009 Final Finding ofSuitability to Transfer#4 FonnerMCAS EI Taro, California

TABLE OF CONTENTS Finding ofSuitability to Transfer

ACRONYMS AND ABBREVIATIONS v 1 PURPOSE 1 2 PROPERTYDESCRIPTION 1 3. REGULATORY COORDINATION 2 3.1 Resource Conservation andRecoveryActPartB Permit and Subtitle C CorrectiveAction 2 3..2 Resource Conservation and RecoveryAct SubtitleI CorrectiveAction 3 3..3 ComprehensiveEnvironmentalResponse, Compensation, andLiabilityAct 4 3.4 Resonrce Conservation and RecoveryAct Corrective Action CompleteDetermination 4 4. SUMMARY OF ENVIRONMENTAL CONDITIONS AND NOTIFICATIONS 5 4,,1 CERCLAfRCRA 6 411 Carve-Out 1-B 6 4
.. 12 Carve-Out 1-E 6 4.13 Carve-OutI-G 6 414 Carve-Out 1-H 6 415 Carve-Out I-I 6 41.6 Carve-Out I-J 6 417 Carve-Out II-G 6 418 Carve-Out II-I 6 41.9 Carve-Out III-D 

### 7 

### 4.2 PetroleumProducts andDerivatives 

### 7 421 Carve-Out 1-B 

### 7 422 Carve-Out I-I 

### 7 423 Carve-Out I-L 

### 7 424 Carve-Out I-M 8 425 Carve-Out 1-P 8 4.2 .6 Carve-Out II-I 8 4.2 7 Carve-Out II-P 8 4.2 .8 Carve-Out III-D 8 

### 4
.

.3 Asbestos-ContainingMaterial 8 

### 4.4 Lead-BasedPaint 8 

### 4..5 PolychlorinatedBiphenyls 9 451 Carve-Out 1-B 9 45.2 Carve-Out 1-M 9 45.3 Carve-OutIII-D 9 

### 4,,6 Radon 10 

### 4,,7 School Site Considerations 10 5 SUMMARY OF RESTRICTIONS 10 5,,1 PetroleumProducts and Derivatives 10 5
..Ll Carve-Out 1-B 11 5
.. 12 Carve-OutI-M 11 5,.2 Asbestos-ContainingMaterial 12January2009

5,3 FinalFinding ofSuitabilityto Transfer#4 FormerMCAS EI Taro, California 5.2 1 Calve-OutI-B 5.22 Calve-OutII-I 523 Calve-OutII-P 

### Lead-BasedPaint 

### 53.! Calve-Out 1-B 

### 532 Calve-OutI-G 

### 5.33 Calve-OutII-I 

### 5.34 Calve-OutII-P 

### 53.5 Carve-OutIII-D 6 ADJACENT PROPERTIES 

### 6.1 Calve-OutI-B 6.2 Calve-OutI-G 6.3 Calve-OutII-G 6.4 Calve-Outill-D 7. COVENANTS 8 ACCESS CLAUSE 9 FINDING OF SUITABILITY TO TRANSFER 10. REFERENCES

ii Finding ofSuitability to Transfer 12 12 12 12 13 13 13 13 13 13 13 13 14 14 14 14 15 16January2009 FinalFinding ofSuitability to Transfer #4 FonnerMCAS EI Taro, California 

### TABLES 1
. Buildings/StructureslFacilities 2. EnvironmentalRequirements andNotifications 3 PotentialRelease Locations 4 Locations ofConcern 5. Locations ofConcern With On-going Petroleum ConectiveActions 6.. Summary ofAsbestos Surveys 7. Monitoring/Bioventing/SVEWells 

### FIGURES 1.. VicinityMap 2. Carve-OutAreaLocationMap 3. Carve-OutI-B 4 Carve-Out 1-E 5. Carve-OutI-G 6. Carve-OutI-H 7. 

### Carve-OutI-I 8. Carve-OutI-J 9.. Carve-OutI-L 10 Carve-OutI-M 11 Carve-Out 1-P 12 Carve-OutII-G 13 Carve-OutII-I 14 Carve-OutII-P 15 Carve-OutIII

-D

iii Finding ofSuitability to TransferJanuary2009 Final Finding ofSuitability to Transfer#4 FormerMCAS EI Toro, California 

### ATTACHMENTS CommentsiResponseto Comments 2 Navy Initiated RevisionstoNovember 2008 DmftFinal 3 Final RCRA COllective Action Complete DeterminationPackage 4a PetroleumProducts Notification Iable 4b. Hazardous Substances Notification Iable

iv Finding ofSuitability to TransferJanuary2009

ACM APHO ASI BRAC CCR CERCLA CO DERP DoD DON DISC EBS EPA FAD FFA FOSI HSC IRP LBP LOC MCAS NFA OCHCA OU OWS PCB PCE ppm 

## PRL RAD RCRA RFA ROD RWQCB SRU SWMU 

### TAA TCE ISCA U.s. U.SC USI VOC FinalFinding ofSuitabilityto Transfer#4 FormerMCAS EI Taro, California ACRONYMS AND ABBREVIATIONS asbestos-containingmaterial aerialphotographfeatnre/anomaly aboveground storagetank Base Realigmnent andClosure California Code ofRegulations Finding ofSuitability to Transfer

ComprehensiveEnvironmental Response, Compensation, andLiabilityAct carve-out DefenseEnvironmental Restoration Program DepartmentofDefense Departmentofthe Navy DepartmentofToxic Substances Control EnvironmentalBaseline Survey Environmental ProtectionAgency friable, accessible, and damaged FederalFacilityAgreement Finding ofSuitabilityto Transfer Health and SafetyCode InstallationRestoration Program lead-basedpaint location ofconcern Marine CorpsAir Station no further action Orange CountyHealth CareAgency OperableUnit oillwater separator polychlorinatedbiphenyl tetrachloroethylene partpermillion potentialrelease location radiologicalinvestigation location Resource Conservation and Recovery Act RCRAFacilityAssessment Record ofDecision RegionalWater QualityControlBoard silverrecovery unit SolidWasteManagementUnit temporary accumulation ar·ea trichloroethylene Ioxic Substances ControlAct United States United States Code underground storagetank volatile organiccompound

vJanuary2009 

### 1. PURPOSE FinalFindingofSuitabilityto Transfer#4 FormerMCAS EI Taro, California FindingofSuitability to Transfer



### The pUlpose ofthis Finding ofSuitabilityto TIansfer (FOST) is to summarize how the requirements and notifications for hazardous substances, petroleum products, and other regulated material within Carve-Outs I-B, I-E, I-G, I-H, I-I, I-T, I-L, I-M, I-P, II-G, II-I, II-P, andIII-D at formerMarine Corps Air Station (MCAS)EI Toro have been satisfiedbythe United States (US)Department oftheNavy (DON) Through the Base Realignment and Closure (BRAC) process, theDONtransferred, by deed, certain MCAS EI Toro real property
.. Other real property known as Carve-Outs (COs) was retained by the DON, pending environmentally suitable to transfer status This FOST was prepared in accordance with the Base Redevelopment and Realignment Manual (Department ofDefense [DoD] 2006), and is consistent with the DoD Base Redevelopment and Implementation Manual (DoD 1997) 2" 

### PROPERTY DESCRIPTION Former MCAS El Toro is located in central Orange County, California (Figure I) and was operationally closed in July 1999 The property proposed for transfer under this FOST consists of 13 COs comprising approximately 42 9 acres Table I presents a summary of the buildings and structures within the CO areas. Figure 2 is a base-wide map that provides the location ofthe CO areas. A briefdescription ofthe CO areas is as follows:
• Carve-Out I-B (Figure 3)

- consists ofapproximately 22
. 

### .9 acres and is located in the western portion ofthe former base. • Carve-Out I-E (Figure 4)

- consists ofapproximately 0
. 

### .9 acre and is located in the western portion ofthe former base • Carve-Out I-G (Figure 5)

- consists ofapproximately 04 acre and is located in the western portion oftheformer base • Carve-Out I-H (Figure 6)

- consists ofapproximately 0.8 acre and is located in the western portion oftheformer base • Carve-Out I-I (Figure 7)

- consists of approximately LI acres and is located in the western portion oftheformerbase) • Carve-Out I-J (Figure 8)

- consists ofapproximately 0.7 acre and is located in the western portion oftheformerbase. • Carve-Out I-L (Figure 9)·· consists ofapproximately 02 acre and is located in the western portion oftheformerbase. • Carve-Out I-M (Figure 10)

- consists of approximately 1.0 acre and is located in the western portion oftheformer base. • Carve-OutI-P (Figure II)

- consists ofapproximately 

### 18 acres and is located in the northern portion oftheformerbase, • Carve-OutII-G (Figure 12)

- consists ofapproximately 7.7 acres and is locatedin the eastern portion oftheformerbase, • Carve-Out II-I (Figure 13)

- consists ofapproximately 04 acre and is located in the eastern portion oftheformer base, • Carve-Out II-P (Figure 14)

- consists ofapproximately 03 acre and is located in the eastern portion oftheformerbase,January2009 FinalFinding ofSuitability to Transfer#4 FormerMCAS EI Taro, Califomia Finding ofSuitability to Transfer


### • Carve-Out III-D (Figure IS)

- consists of approximately 4
. .7 

### acres and is located in the western portion ofthe former base. 3., REGULATORY COORDINATION 

### Former MCAS EI Ioro was listed on the 

## u.s Environmental Protection Agency (EPA) National Priorities List under the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) in February 1990
.. IheDefenseEnvironmental Restoration Program (DERP), codified as 10 United States Code (U.S
. .c) 

### 2701-2709, gave the DoD Environmental Restoration Program a statutory basis The DON implements the DERP subject to, and in a manner consistent with, CERCLA and its regulations. In 

### October 1990, U.s EPA Region 9, State of California Department of Health Services (now referred to as California EPAJDepartment of Ioxie Substances Control [DISC]), Santa Ana RWQCB, and the DON signed a Federal Facility Agreement (FFA) (DON 1990) Ihe U.s EPA, DISC, and Santa Ana RWQCB were notified ofthe initiation ofthis FOSI and were issued copies for review. Regulatory agency comments to this FOSI are provided in Attachment I 3.1 RESOURCE CONSERVATION AND RECOVERY ACT PART

### B PERMITAND SUBTITLE C CORRECTIVEACTION 

### Ihis FOSI reviews sites that were evaluated and addressed under DON's CERCLA and DERP authority as well as sites addressed under the corrective action requirements of the Resource Conservation and Recovery Act (RCRA) Subtitle C (for Solid Waste Management Units [SWMUs]), RCRA Subtitle I (for underground storage tanks [USIs]), and associated state laws and regulations administered by the U.S
.. EPA, the State ofCalifornia, and the County of Orange. Ihese corrective action authorities are similar to CERCLA in that they require response/corrective action (cleanup) where necessary in order to ensure adequate protection ofhuman health and the environment

- see Section 121(d) ofCERCLA, Health and Safety Code (HSC) Section 2529610(b), Iitle 23 California Code ofRegulations (CCR) Sections 2720 (definition of"corrective action") and 2725(c), and Title 

### 22 CCR Section

### 66264
..101(a).. A decision that no action is required in order to protect human health and the environment, made by DON or an environmental regulator under those laws and regulations, also supports a DON determination under Section l20(h) of CERCLA that all remedial action necessary to protect human health and the environment with respect to any such substance remaining on the property has been taken and adeterminationthat all necessary RCRA Subtitle C corrective action has been completed
.. Former MCAS El Ioro was subject to a RCRA Part B permit that was issued in June 1993 and expired on 18 August 2003. Ihe permit addressed one regulated unit (Building 673-13) as well as RCRA corrective action requir·ements for SWMUs
.. The RCRA permit incorporated the FFA for MCAS El Toro by reference and provided, in relevant part: "The activities requir·ed by the Agreement are intended to satisfY the corrective action requirements ofRCRA Section 3004(u) and (v), and 42 U.s.C Section 6924(u) and (v). IheAgreement and any schedules contained therein are hereby incorporated by reference as the schedule for completing corrective action at the facility
..." (Subsection V Al ofthe permit). Ihe FFA itselfspecifically requires that RCRA corrective action requirements be addressed in the FFA process - see subsections Il(b), L2(e), 31, 17.1, 172, 17.3, and 19 oftheFFA (DON 1990)

2January2009 FinalFinding ofSuitabilityto Transfer#4 FonnerMCAS EI Taro, California Finding ofSuitability to Transfer 

### The rationale for integrating CERCLA and RCRA conective action requiIements in this fashion is stIaightfOlward The cleanup standard for CERCLA is set fOlth in Section 121 of CERCLA (CLEANUP STANDARDS), which states in the relevant part of Subsection 121(b)(I):" The President shall select a remedial action that is protective ofhuman health and the envirornnent ," (42 USc. Section 9621(b)(I)), The cleanup standard for RCRA Subtitle C cOlrective action in the State ofCalifoIllia, is set fOlth in Title 22 CCR Section 66264.101(a) and provides, "The owner or operatOl of a facility seeking a permit for the transfer, tI'eatJnent, storage, or disposal ofhazardous waste shall institute COllective action as necessary to protect human health and the envirornnent for allreleases ofhazardous waste 01

### constituents from any solid Orhazardous waste managementunit at the facility, regardless ofthe time at which waste was placed in such unit" See also HSC Sections 25187 and 25200,.1O(b) In a letter dated 8 March 1996, DTSC concUired with no further action (NFA) for Building 673-13 and statedthatthepermitwas terminatedbased on the closUie certification report that was submitted by DON (DTSC I996). DON continues to complete all RCRA Part B permit COllective actions for the SWMUsunderthe 1990 executedFFA DTSC plOposed a RCRA COIrective Action Complete Determination for ten ofthe COs (I-E, I-G, 1- H, I-I, I-I, I-P, II-G, II-I, II-P, and III-D), approximately 18 8 acres, as well as aNotice ofExemption pUisuant to the CalifoIllia Environmental Quality Act Two ofthe remaining COs (I-B and I-M), applOximately 23.9 acres, have on-going COllective action for petlOleum releases and requiIe additional documentation in order to satisfy the cOlrective action requirements under RCRA
.. Both COs I-B and I-M are proposed for transfer with restIictions as discussed in Section 5,,0 CO I-L, applOximately 0 2 acres, received NFA during the recent public comment period but is not included in DTSC's RCRA COIrective Action Complete Determination, Although DON will pursue the RCRA COIrective Action Complete Determination at a later time, CO I-L is now plOposed for transferwithoutrestIictions (see Attachment 2) 3.2 RESOURCE CONSERVATION AND RECOVERY ACTSUBTITLE 

### I CORRECTIVE ACTION 

### The OCHCA and the RWQCB administer the UST COllective action program at fOlmer MCAS El Toro pursuant to RCRA Subtitle I and Section 25280-25299,8 ofthe CaliforniaHSC. The authority ofOCHCA and the RWQCB to require COllective action at UST sites is set forth at Title 23 CCR, division 3, chapter 16, These regulations specifically define "cOlrective action" as " ",any activity necessary to investigate and analyze the effects of an unauthOlized release; plOpose a cost-effective plan to adequately protect human health, safety, and the envirornnent and to restore 01 

### protect cUllent and potential beneficial uses ofwater; and implement and evaluate the effectiveness ofthe activity(ies) , " (Title 23 CCR Section 2720) FUithermore, Section 2725(c) ofthe regulations sets fOith requirements for cOlI'ective action plans prepared by responsible parties and states that, "The regulatOly agency shall concUi with the cOlrective action plan after determining that implementation of the plan will adequatelyprotect human health, safety, and the envilOrnnent and will restore and plOtect cUllent 01 

### potentialbeneficialuses ofwater" NFA letters issued by the RWQCB specifically stated that NFA determinations were based upon Section 272I(e) ofthoseregulations which provides "Uponcompletion ofrequired COllective action, the regulatOlY agency shall infOlm theresponsible party inW1iting thatno further wOlk is required at that time, basedon available information" HSC Section 25296.10(a) provides that the State Water Resource ContIol Board" ,shall develop cOlI'ective action requirements for health hazards and protection ofthe environment based on the

3January2009 FinalFinding ofSuitability to Transfer#4 FormerMCAS EI Toro, California Finding ofSuitability to Transfer 

### severity of the health hazards and the other factors listed in subdivision (b),.. "HSC Section 25296JO(b) provides, "Any corrective action conducted pursuant to this chapter shall ensure protection ofhuman health, safety, andthe environment" The corrective action cleanup standard for USI s implemented by the RWQCB and OCHCA are codified in HSC Section 25296.10(b), Iitle 23 CCR2720 (definition of"corrective action") and Iitle 23 CCR2725(c) (soil andwaterinvestigationphase, corrective action plan). 3.3 COMPREHENSIVE ENVIRONMENTAL RESPONSE. COMPENSATION. AND LIABILITY ACT 

### CERCLAresponse actions are initiated at environmental sites where CERCLA hazardous substances have been or may have been released CERCLA response actions within the cas addressed in this FOSI includes installationrestoration program (IRP) sites A CERCLA response action has been completed at IRP Site 13 within CO III-D.. Details regarding CERCLAresponse actions and the applicable restrictions for CO III-D are provided in Section4 1.9. Except for preliminary investigation activities, such as soil sampling and exploratory trenching, no CERCLAresponse actions were required within the 12 remaining cas 3.4 RESOURCE CONSERVATION AND RECOVERY ACT CORRECTIVE ACTION COMPLETE DETERMINATION 

### DISC provided the following paragraphs summarizing the DISC RCRA Corrective Action Complete Determination at former MCAS EI Ioro. Drsc is the agency responsible for enforcing the hazardous waste laws and regulations in California.. California was granted authorization by the EPA to administer a state hazardous waste program in lieu ofthe federal RCRA program Ihe Hazardous Waste Control Law codified in the HSC is the basic lawthat implements the waste management system in California Section 25200.10 and 25187 of Chapter 65 ofDivision 20 ofthe HSC provides the authority to require corrective action at a hazardous waste facility.. It 

### states that DISC, and any permit issued by DISC, shall require corrective action for all releases of hazardous waste or constituents from a SWMU or a hazardous waste management unit For the purpose ofimplementing corrective action, a hazardous waste facility is defined as all contiguous property tmder the control ofthe owner or operator ofthe facility (CCR, Iitle 22, Section 66260.10 [Definition of a Hazardous Waste Facility]). DISC's determination that all corrective action has been completed for a portion ofa facility eliminates the requirement to conduct further corrective action homthe current and future owners ofthe property Attachment 3 summarizes DISC's intent to make the RCRA Conective Action Complete Determinationfor portions ofthe former MCAS EI Ioroidentified in FOSI #4 On November 22, 2008 a notice was published in the Los Angeles limes and the Orange County Register. Ihenotice invited public review and comment on the DISC'sproposed RCRA Corrective Action Complete Determination and RCRA Hazardous Waste Facility Boundary Modification and on the DaN'sDraftFinal FOSI #4 for Carve-outs I-B, I-E, I-G, I-H, I-I, I-T, I-L, I-M, I-P, II-G, II-I, II-P, and III-D at the former MCAS EI Toro. The same notice also discussed DISC's proposed NOE prepared for the project under the CEQA Additionally, DISCmailed the public notice to all individuals on theMCAS EI Ioromailing list (approximately 500) on November 21,2008 Ihe45- day public comment period began on November 22, 2008 and continued through January 6, 2009
.. DISC received no comments during the 45-day public comment period and has made a decision to approve the RCRA Corrective Action Complete Determination and the RCRA Hazardous Waste Facility Boundary Modification IheDON did not receive any public comments on the Draft Final

4January2009 Final FindingofSuitability to Transfer#4 FonnerMCAS EI Taro, California Finding ofSuitability to Transfer 

### FOSI #4 Ihe Final RCRA Conective Action Complete Determination Package can be found in Attachment 3 4" SUMMARY OF ENVIRONMENTAL CONDITIONS AND NOTIFICATIONS 

### This section summarizes the environmental conditions and notifications as they relate to CERCLA and RCRA, peholeum products and derivatives, asbestos-containing materials (ACM), lead-based paint (LBP) and otherregulated material within the COs Iable 2 identifies the environmental notifications and requirements applicable to the COs. Based on an evaluation of the MCAS EI Ioro Environmental Baseline Survey (EBS) of September 2003 (Earth I ech 2003), hazardous substances, peholeum products, CERCLA and RCRA response actions, storage tanks, oil/water separators (OWSs), ACM, LBP, polychlorinated biphenyls (PCBs), silver recovery units (SRUs), and radiological investigation locations (RAD) were present or have occurred withinthe COs Additionally, the EBS identified several facilities/features as being associated with a potential release ofcontaminants to the environment Ihese locations were first identified during the preparation of the 2003 EBS, and are labeled as potential release locations (PRLs) Subsequently, the FFA signatories agreed that the DON would prepare investigation plans, perform field evaluations, and provide conclusions as to whether a PRL needed to be included in a specific regulatory clean-up program, or whether no further investigation was wananted. Iable 3 identifies and provides the status ofthe PRLs withinthe CO areas. Based on additional records reviews and soil sampling it was determined that no significant release ofhazardous substances or pollutants has occurred; therefore, no further action is warranted at the following PRLs: CO I-B

- 439 (EPA 2008, DISC 2008), 443 (DISC2004), and 651 (EPA 2003, DISC 2003); CO I-H

- PRL 51 (EPA 2005, DISC2005); CO I-I

- 46 (EPA 2008, DISC 2008), and 47 (EPA 2005a, DISC 2005a); and CO I-J

- 22 (EPA 2005c, DISC2005b). Iable 4 identifies locations ofconcern (LOCs) within the COs LOCs are areas where a release is suspected to have occUlred, a documented release has occuned, or based on the types ofactivities that occuned in the area, there was a potential for a release Ihe types ofLOCs present within the COs include: hazardous substance sites, RCRA Facility Assessment (RFA) sites, temporary accumulation areas (TAAs), aerial photograph feature/anomaly (APHO) sites, IRP sites, AS

### Is, USls, OWSs, SRUs, RAD sites, and PCB-containing transformers and equipment LOCs within the COs proposed for hansfer have received regulatory agency concurrence ofNFA with the exception ofon-going petroleum corrective actions in USls 651-1, 651-2, 651-3, and 651-4 in CO I-B and USI 65A 

### in CO I-M (Iable 5) NFA designations are based on the findings of evaluations or cleanup actions that these LOCs are suitable for hansfer as long as the applicable notifications and restrictions outlined in Sections 4 and 5 respectively are adhered to
.. Ihis includes LOCs that meet the federal and state definitions of SWMUs and received NFA designations either because no corrective action was required to provide adequate protection ofhuman health and the environment, orthe required corrective action has been completed A summary ofLOCsby type is provided in the following subsections. Past activities within the COs proposed for transfer included the use and storage of hazardous substances and petroleumproducts
.. A notice ofhazardous substances and peholeum products stored, released, or disposed at specific sites within the COs proposed for hansfer are listed in Attachments 4a- PetroleumProducts, and 4b
.. Hazardous SubstancesNotifications

5January2009 

### 4.1 CERCLAIRCRA Final Finding ofSuitabilityto Transfer#4 FormerMCAS EI Taro, California Finding ofSuitability to Transfer



### Ihefollowing CERCLAJRCRA sitesreceived closureNFA concurrence within the COs. Site closure actions are detailed in Iable 4 4.1.1 Carve-Out 1-8 

### (Figure 3) 

### REA Sites

- REA 164 was associated with Building 651, and received site closure concuuence (DISC 1996a) IAA Sites

- IAA sites 651A (DISC 2003a) and 651B (DISC 2006) received site closure concurrence, 

### SRUs

- SRUs-I and 2 were evaluated under PRLs 439, and 443, respectively, and it has been determined that no further action is required (EPA 2008, DISC 2008) and (DISC 2004), respectively RAD

- Ihe suspected former Radium Plaque Adaptometer Building site has received site closure conCUlrence hom the California Department ofHealth Services (California Department ofHealth Services 2006) andthe EPA (EPA 2005b) 4.1.2 Carve-Out I-E (Figure 4) 

### IAA Sites

- IAA2received site closure conCUlrence (DISC2006a) 4.1.3 Carve-Out

### I-G (Figure 5) 

### IAA Sites

- IAA sites 7(DISC 2006b) and 7B (DISC 2003b)received site closure conCUlrence 4.1.4 Carve-Out I-H (Figure 6) 

### IAA Sites

- IAA51 received site closure concurrence (DISC 2006c) 4.1.5 Carve-Out I-I (Figure 7) 

### SRUs

- SRU 3A was evaluated under PRL 46; it has been determined that no fUlther action is required (EPA 2008 and DISC2008) 4.1.6 Carve-Out I-J (Figure 8) 

### IAA Sites - IAA 22 received site closure conCUlrence (DISC 2006d) 4.1.7 Carve-Out II-G (Figure 12) 

### APHO Sites

- APHO 118 received closure conCUlrence fiom the DISC (DISC 2007), and homthe RWQCB (RWQCB 2007) 4.1.8 Carve-Outll-I (Figure 13) 

### REA Sites

- REA 213 received site closure concurrence homthe DISC (DISC 2003c), and homthe RWQCB (RWQCB 2003) IAA Sites -IAA392A and 392B received site closure concurrence (DISC 2003d)

6January2009 FinalFinding ofSuitabilityto Transfer#4 FonnerMCAS EI Taro, California 

### 4.1.9 Carve-Out III-D (Figure 15) Finding ofSuitability to Transfer



### IRP Site

- CO III-D contains Oil Change Area IRP Site 13, which received regulatory agency NFA concurrence from DISC, US. EPA, and RWQCB. Ihe selected remedy in the Record ofDecision (ROD) signed on 30 September 1997, fell Site 13 was no action (DoD 1997a). No deed restrictions were recommended for Site 13 due to chemicals present in the soil However since the groundwater beneath Site 13 was contaminated by trichloroethylene (ICE) and tetrachloroethylene (PCE; also perchloroethylene) due to Site 24

- volatile OIganic compound (VOC) source area, when the NFA ROD was signed in 1997, the use restrictions prohibiting drilling of wells andiOi extraction of groundwater and allowing access fOi groundwater monitoring and maintenance of equipment associated with groundwaterremediation were to be addressed inthe ROD for Operable Unit (OU)-I Site 18 and OU-2A Site 24 (DON 1997) When the Final ROD for OU-I Site 18 and OU-2A Site 24 was completed in 2002 (DON 2002), the updated VOC plume and 500 foot buffer zone were no longer located beneath Site 13.. 

### Consequently, groundwater restrictions due to the Site 24 VOC plume are no longer applicable fOi Site 13. 4.2 PETROLEUM PRODUCTSAND DERIVATIVES 

### The corrective action cleanup standards for petroleum USTs implemented by the RWQCB and OCHCA are codified in HSC Section 25296 10Cb), Title 23 CCR 2720 (definition of "corrective action") and Title 23 CCR 2725(c) (soil and water investigation phase, corrective action plan). As noted in Section 3.1, DISC has determined that investigations and cleanups conducted under the oversight ofthe RWQCB and OCHCA on property identified in this FOSI as COs I-I, I-P, II-I, II-P, and III-D have satisfied the cOirective action requirements under RCRA and the Hazardous Waste Control Law. Although CO I-L received NFA diuing the recent public comment period, it is not iucluded in DISC's RCRA Corrective Action Complete Determination. COs I-B and I-M require additional documentation in order to satisfy the corrective action requirements under RCRA. Site closure actions are detailed in Table 4
.. 4.2.1 Carve-Out 

### 1-8 (Figure 3) 

### ASls

- ASls439 (RWQCB 2000) and 651 (RWQCB 2000a)received site closure concurrence USls

- USls 439A, 439B (OCHCA 1996), 443 (RWQCB 1995), 651-5, 651-6, 651-7 (OCHCA 1997), 693A, and 693B (OCHCA 1996a) received site closure concurrence. USls 651-1, 651-2, 651-3 and 651-4 received NFA for the unsaturated soils (vadose zone) (RWQCB 2008b), however, the groundwater associated with these tanks is part ofan on-going petroleum cOirective action (see Section 5
. .1 for restrictions) OWSs

- All necessary response actions related to OWS 651-8 (RWQCB 2000b) have been completed with a determination that no further action is necessary. 4.2.2 Carve-Out I-I (Figure 7) 

### ASIs - AST 47 received site closure concurrence (RWQCB 2002). USTs·· USls46 (OCHCA 1996b), 47A, and 47B (RWQCB 1999) received site closure concurrence 4.2.3 Carve-Out I-L (Figure 9) 

### USTs - USI 254 (RWQCB 2008c)has received site closure concurrence

7January2009 Final Finding ofSuitability to Transfer#4 FonnerMCAS EI Taro, California 

### 4.2.4 Carve-Out I-M (Figure 10) Finding ofSuitability to Transfer



### USIs

- USI 65A is undergoing remedial actions fOl a petmleum release (See Section 5.1 fOl restrictions)
. 

### 4.2.5 Carve-Out I-P 

### (Figure 11) USIs

- USIs 75A (RWQCB 1995a), 75B (RWQCB 1996), 75C (RWQCB 2008), and 75D (OCHCA 2004) received site closure concUlrence 

### 4.2.6 Carve-Out II-I (Figure 13) USIs

- USIs 308 (RWQCB 2006), 392A (OCHCA 1996c), 392B (OCHCA 1997a), 392C (OCHCA 1997b), 392D (RWQCB 2004), 392E, and 392F (OCHCA 1999) received site closure concunence USI 764A received site closure concUlrence fiom the DISC (DISC 2006e), and the RWQCB (RWQCB 2006a) OWSs

- OWS 764B received site closure concUlrence thatno fUlther action is necessruy flOm DISC in (DISC 2006e), and fiom the RWQCB (RWQCB 2006a) 

### 4.2.7 Carve-Out II-P (Figure 14) ASIs

- ASI 637 received site closure concUlrence (EPA 2003a, DISC2003) USIs

- USIs 637-1, 637-2, and 637-3 received site closure concunence (RWQCB 2008a). 

### 4.2.8 Carve-Out 

### 111-0 (Figure 15) USIs

- USIs 176, 177, 178, 179, 180, 181, 182, 183, and I-5received site closure concunence hom the RWQCB for vadose zone soil (RWQCB 2000c), and for glOundwater (RWQCB 2007a) 4.3 ASBESTOS-CONTAINING MATERIAL It

### is DoD policy to manage ACM in a manner plOtective ofhuman health and the environment, and to comply with all applicable federal, state, and local laws and regulations goveming ACM hazruds (DoD 1994a) Iherefore, unless it is determined by a competent authOlity that ACM onthe property poses atlueatto human health at the time oftransfer, all property containingACM will be conveyed, leased, or otherwise disposed "as is" tluough the BRAC process. If

### ACM in a building does pose a threat to human health or the environment, occupation ofthe building will be prohibited until the ACM is abated 01

### the building is demolished by atransferee Remediation ofACM is notrequired in buildings that are scheduled fOl demolition by the transferee Ihere rue a total ofseven buildings within five ofthe COs proposed for transfer. Information on the existence, extent, and condition ofACMatbuildings/structures/facilities is provided in I able 6 

### 4.4 LEAD-BASED PAINT 

### Notifications ofpotential LBP atbuildings withinthe COs proposedfor transfer are based on the age of construction (i.e., constructed before the Consumer Product Safety Commission's 1978 ban on LBP for residential use).. IheCOsproposed for transfer containbuildingsthat were constructedprior to 1978 and may contain LBP Ihe age ofmany ofthebuildings onthe plOperty suitable for transfer suggests the likelihood that LBP maybe present on some ofthese buildings
.. Ihis in tum creates the possibility that, through the action ofnormal weathering and maintenance, there may be lead hom LBP in the soil sUllOunding these buildings Ihe constmction dates for each ofthe buildings within the COs are summarized in Table L

8January2009 FinalFinding ofSuitability to Transfer#4 FonnerMCAS EI Taro, California Finding ofSuitability to Transfer 

### Demolition ofnon-residential buildings constructedpriOi to 1978 createsthe possibility ofleadbeing found in the soil as a result of such activities
.. With respect to any such non-residential buildings which the transferee intends to demolish and redevelop for residential use after transfer, the transferee may, under applicable law or regulation, be required by DISC or other regulatOIY agencies to evaluate the soil adjacent to such non-residential buildings for soil-lead hazards, and to abate any such hazards that may be present, after demolition ofsuch non-residential buildings and priorto occupancy ofanynewly constructedresidential buildings. 4.5 POLYCHLORINATED BIPHENYLS 

### Ballasts in fluorescent light fixtures made priOi to 1979 may contain sealed PCB-containing components. A survey of the station fOi PCB-containing light ballasts has not been conducted; however, it is assumed that buildings, structures, and facilities constlUcted priorto 1979 have PCBs in the ballasts of older light fixtures
.. It 

### should be noted that many buildings that were constructed priorto 1979have had interiorrenovations andnewlight fixtures installedthat do not contain PCBs Fluorescent light ballasts manufactured before 1979 often contain PCB capacitOis that may be disposed as municipal solid waste. No action is required atbuildings, structures, and facilities unless large quantities of PCB-containing fluorescent light ballasts are removed AccOiding to DON guidance on the disposal offluorescent light ballasts containing PCBs (DON 1989), when a large quantity of PCB capacitors needs to be disposed, they should be handled as regulated PCB equipment Fluorescent light ballasts that contain PCBs have approximately 10 to 1.5 ounces of PCB fluid in each capacitOI
.. There are approximately 3.1 to 4
. .7 

### pounds of PCB fluid fOi every 50 PCB small capacitors in fluorescent lightballasts Ihe disposal of PCBs is regulated under the federal Toxic Substances Control Act (TSCA) (15 USc. Section 2601, et seq, as implemented by 40 Code of Federal Regulations Part 761), which banned the manufacture and distribution of PCBs, with the exception of PCBs used in enclosed systems. By federal definition, PCB equipment contains 500 parts per million (ppm) PCBs OI more, whereas PCB-contaminatedequipment contains PCB concentrations equal to or greaterthan 50 ppm, but less than 500 ppm The TSCA regulates and the U.S EPA enforces the removal and disposal of all sources ofPCBs containing 50 ppm or more.. Items containing PCBs below 50 ppm are classifiedbyTSCA as non-PCB items and are not requiredtoberemoved from service 4.5.1 Carve-Out I-B 

### (Figure 3) 

### PCBs

- There are two PCB non-transformer items within Building 439 and a pad-mounted transfOimer (pCB T -67) atBuilding439 all with less than 42ppm PCB concentrations
.. No evidence of a release has been identified for the transfOimer or equipment. There was one PCB nontransformer item within Building 651 with less than 1.0 ppm PCB concentration. This PCB nontransformer item was removed whenthe building was demolished (DISC2003e and EPA 2003a) 4.5.2 Carve-Out I-M (Figure 10) 

### PCBs -TransfOimers PCB TlO, TIl, and Tl2 were within CO I-M 

### No evidence ofarelease was identified at thesetransformers (DTSC 2003e and EPA 2003a) 4.5.3 Carve-Out III-D (Figure 15) 

### PCBs

- Non-transformer PCB items PCB 176 and PCB 178, with 3.8 ppm, were removed during tankremoval activities in 1995 (DISC 2003e and EPA 2003a).

9January2009 4.6 RADON FinalFinding ofSuitabilityto Transfer#4 FonnerMCAS EI Taro, California FindingofSuitability to Transfer



### Radon is anaturally OCCUlting, colorless, and odorlessradioactive gas thatis ptoducedbyradioactive decay of naturally occuning manium. Uranium decays to radium, of which radon gas is a byproduct Radon is found in high concentration in rocks containing manium such as granite, shale, phosphate, and pitchblende Atmospheric radon is diluted to insignificant concentrations Radon that is present inthe soil, however, can enter a buildingthruugh small spaces and openings, accmnulating in enclosed areas such as basements Ihe cancer risk caused by exposure thruugh the inhalation of radon is a topic ofconcern DoD policy is to disclose available and relevant radon assessment datapertainingto BRAC property being leased or transferred for inclusion in property lease/transfer documents. However, there is cmrently no federal requirement to perform follow-on radon assessment or mitigation in federal buildings, includingthoseto be transferred to the public orprivate sector
.. A radon survey was conducted at former MCAS EI Ioto in 1991. In

### accordance with DoD guidance (DoD 1994a), radon screening results were based upon a representative sampling ofbuildings
.. Ihe buildings surveyed included the station hospital (Building 431), the childcare center (Building 656), and approximately 185 locations in the family housing areas.. The results indicated that none ofthe buildings or housing units exceeded the radon thr·eshold value of 4 picocuries per liter (pCi/I). Therefore, no mitigative action or further testing was recommended (JEG 1995). Based on these sampling results, it is anticipated thatradon levels in other buildings at former MCAS EI Ioro should notbe significantly different from those surveyed (levels should not exceed4 pCi/l) (USMC/SWDN 1999) 4.7 SCHOOL SITE CONSIDERATIONS If, 

### subsequent to transfer, any portions ofthe property found suitable to transfer by this FOSI is considered for the proposed acquisition andlor construction ofschool properties using state funding, a separate environmental review process in compliance with the California Education Code section 17210 et seq.. will need to be conducted by the transferee and approved by DISC (Brownfields and Environmental Restoration Ptogram) Ihe California Education Code requires that a comprehensive evaluation of natural and manmade hazardous materials be conducted for school properties Ihis comprehensive evaluation requires additional investigation ofhazardous materials outside the scope ofCERCLAhazardous substances Ihis additional evaluation includes legally applied pesticides and herbicides, imported fill materials, natmally occurring hazardous substances such as heavy metals (e.g., chromium, mercury, nickel), metalloids (e.g
.., arsenic, selenium), gases (e.g., methane, hydrogen sulfide), radioactive elements (e
..g., radon gas), and natmally-occuningpetrulemn deposits The evaluation also includes ACM and LBP at concentrations that tall outside the scope of CERCLA. Anyrequirements associated with the evaluation of any property for compliance with the CaliforniaEducation Code are the sole responsibility ofthe transferee
.. 5.. SUMMARY OF RESTRICTIONS 

### Ihis section summarizes the restrictions associated with each ofthe CO areas proposed for transfer relatedto petroleumproducts and derivatives, ACM, and LBP Iheserestrictions on certain activities ensure that post-transfer use ofthe CO areas is consistent with protection ofhuman health and the environment, and are environmentally suitable for transfer
. 5.1 PETROLEUM PRODUCTS AND DERIVATIVES 

### Ihe following sites have on-going corrective action requirements which will remain the responsibility ofthe DON aftertransfer. Additional details are provided in I able 5

10January2009 FinalFinding ofSuitabilityto Transfer#4 FormerMCAS EI Taro, California 

### 5.1.1 Carve-Out 

### 1-8 (Figure 3) Finding ofSuitability to Transfer



### USIs

- USIs 651-1, 651-2, 651-3, and 651-4 are pmt of an ongoing petroleum cOIIective action related to groundwater. Iherefore, land use restrictions for the petroleum plume mea will be incOlporated into the Quitclaim Deed and implemented in order to limit the exposure to petroleum and its derivatives andtomaintainthe integrity ofcOllective actions In 

### order to protect present or future human health, safety, and the environment, the transferee shall refrain from the following acts within the m·ea designated On Figure 3 without prior review and written approval from the DONandRWQCB until cleanup objectives have been achieved:
• Any activity that causes orfacilitates the movement ofknown contruninated groundwater. • Alteration, disturbance, or removal of any component ofa COllective action, including but not limited to, groundwater extraction, injection, and monitOIing wells (Iable 7) and associatedpiping and equipment; 01 

### associated utilities; • Ext!action ofgroundwater andinstallation ofnew groundwaterwells; and • Removal ofOr drunage to secUlity features (fOi example, locks on monitOIing wells, sUlvey monuments, fencing, signs, OI monitOiing equipment and associated pipelines and appUltenances) Iheserestrictions maybe released when the RWQCB has concUlred thatthe cleanup objectives have been achieved and arelease document is recorded withthe county clerk 

### 5.1.2 Carve-Out I-M (Figure 10) USI

- USI 65A has not received regulatOlY conCUllence. Iherefore, land use restrictions for soil contamination will be incOlporated into the Quitclaim Deed and implemented in order to limit the exposure to petroleum and its derivatives and to maintain the integrity of cOirective actions until corrective action is complete and federal and state cleanup levels have been met In order to protect present OJ 

### future human health, safety, and the environment, the transferee shall refiain from the following acts within the area designated in Figure 10 without prior review and written approval from the DON and RWQCB until cleanup objectives have been achieved:
• "Land distUlbing activity" which includes but is not limitedto: o Excavation ofsoil; o Any activitythat involves movement ofsoil to the sUlface ofthe landhombelowthe surface ofthe land; and o Any other activitythat causes orfacilitates the movement ofknown contruninated groundwater • Alteration, distUlbance, OJ 

### removal ofany component of a corrective action, including but not limited to, groundwater extraction, injection, and monitOIing wells and associated piping and equipment; or associated utilities; • Extraction ofgroundwaterand installation ofnew groundwater wells; and • Removal ofor damage to secUlity features (fOi example, locks on monitOIing wells, sUlvey monuments, fencing, signs, or monitoring equipment and associated pipelines and appUltenances)
.

11January2009 Final Finding ofSuitabilityto Transfer#4 FormerMCAS EI Taro, California Finding ofSuitability to Transfer 

### These restrictions may be released when the RWQCB has concUIred thatthe cleanup objectives have been achieved and arelease documentis recorded withthe County Clerk 

### 5.2 ASBESTOS-CONTAINING MATERIAL 

### 5.2.1 Carve-Out I-B 

### (Figure 3) Building 439

- This building is classified as containing fiiable, accessible, and damaged (FAD) ACM, Except for short-term and emergency maintenance, access, use, or occupancy is prohibited pending either (I)completion ofACM smveys and completion ofany necessaryACM abatement, or (2) demolition by the transferee, in accordance with all applicable local, state, and federal laws and other requirements relatingto asbestos or ACM. Pending completion ofabatement or demolition, the transferee shall manage the ACM in accordance with all such applicable local, state, and federal laws and requirements, 

### 5.2.2 Carve-Out II-I (Figure 13) Building 392

- This building is classified as containing FAD ACM Except for short-term and emergency maintenance, access, use, or occupancy is prohibited pending either (1) 

### completion of ACM smveys and completion ofany necessary ACM abatement, or (2) demolition bythe transferee, in accordance with all applicable local, state, and federal laws and other requirements relating to asbestos or ACM Pending completion ofabatement or demolition, the transferee shall manage the ACM in accordance with all such applicable local, state, and federal laws andrequirements., Buildings 308 and 764

- These buildings require an ACM Smvey, Buildings require a smvey ifthey have never been smveyed for ACM; non-FAD ACM was detected in a smvey that was conducted prior to but not since 1997 (i e, not within the last 3 years of station operation) or they were sUIveyed for FADACM only and, therefore, the presence ofnon-FAD ACM is unknown. Except for short-term and emergency maintenance, access, use, or occupancy is prohibited pending either (1) 

### completion ofACM sUIveys and completion ofany necessaryACM abatement, or (2) demolition by the transferee, in accordance with all applicable local, state, and federal laws and other requirements relating to asbestos or ACM, Pending completion of abatement or demolition, the transferee shall manage the ACM in accordance with all such applicable local, state, and federal laws andrequirements, 

### 5.2.3 Carve-Out II-P (Figure 14) Building 637

- This buildingrequires an ACM Smvey. Buildings require a smvey iftheyhave never been smveyed for ACM; non-FAD ACM was detected in a sUIvey that was conducted prior to but not since 1997 (i .e, not within the last 3 years of station operation) orthey were sUlveyed for FAD ACM only and, therefore, the presence ofnon-FAD ACM is unknown. Except for short-term and emergency maintenance, access, use, or occupancy is prohibited pending either (1) 

### completion of ACM surveys and completion ofany necessary ACMabatement, or (2) demolition bythetransferee, in accordance with all applicable local, state, and federal laws and other requiI'ements relating to asbestos or ACM Pending completion ofabatement or demolition, the transferee shall manage the ACM in accordance with all such applicable local, state, and federal laws andrequirements., 

### 5.3 LEAD-BASED PAINT In 

### its use and occupancy of the property, including but not limited to demolition of buildings, stlllctmes, and facilities, and identification and/or evaluation ofany LBP hazards, the transferee shall be responsible for managing LBP and LBP hazards in accordance with applicable local, state, and federal laws, and other requirementsrelatingto LBP andLBP hazards

12January2009 FinalFinding ofSuitability to Transfer#4 FonnerMCAS EI Toro, Califomia 

### 5.3.1 Carve-Out 1-8 

### (Figure 

### 3) Finding ofSuitability to Transfer


### Building 439 (1959)

- Nonresidential buildings constmcted pliOl to 1978 may not be used for residential use or child-occupiedbuildings unless the transfereepeifc>lms anynecessruy evaluation(s) and abatementin accordance with all local, state, and federal laws and other applicable requirements, 

### 5.3.2 Carve-Out

### I-G (Figure 

### 5) Building 7 (1943)

- Nonresidential buildings constructed prior to 1978 may not be used fOl residential use orchild-occupiedbuildings unless the transferee perfOlms anynecessruy evaluation(s) and abatement in accordance with all local, state, and federal laws and other applicablerequirements, 

### 5.3.3 Carve-OutII-I (Figure 

### 13) Building 308 (1944), Building 392 (1955)

- Nonresidential buildings constmcted priOl to 1978 may not be used for residential use or child-occupied buildings unless the transferee peiforms any necessruy evaluation(s) and abatement in accordance with all local, state, and federal laws and other applicablerequirements, 

### 5.3.4 Carve-OutII-P (Figure 

### 14) Building 637 «1973)

- Nonresidential buildings constmcted prior to 1978 may not be used for residential use orchild-occupiedbuildings unless the transfereepeiforms any necessary evaluation(s) and abatement in accordance with all local, state, and federal laws and other applicable requirements 

### 5.3.5 Carve-Out 

### 111-0 (Figure 

### 15) Building 26 (1943)

- Nomesidential buildings constructed prior to 1978 may not be used for residential use orchild-occupiedbuildings unless the transferee performs anynecessruy evaluation(s) and abatementin accordance with all local, state, and federal laws and other applicablerequirements, 

### 6" ADJACENT PROPERTIES Nine ofthe 13 

### COs in the FOST rue sutlOunded byplOperty thatwas transfened in the initial MCAS EI10roFOST ofJuly 2004 (DON 2004a) As the land areas ofthe erulier FOST were found suitable for transfer, they pose no negative effects on the COs proposed for transfer in this FOST, The four COs in this FOSTthat are adjacentto COsrequiring additionalremediation are described below 

### 6.1 CARVE-OUT 1-8(FIGURE 3) 

### This CO acijoins CO I-Q which contains an abandoned petroleumUSLUST 367 on adjacent CO I-Q is a 2,500-gallon diesel tank that was abandoned in Febmruy 1994
.. 1he soil boring analytical data indicates that the contrunination is confined to the ruea immediately acijacentto the UST site which is approximately 320 feet nomthe edge ofCO I-B and there is no groundwater contamination at UST 367; therefore, there is no possibility offuture contrunination to CO I-B nom the abandoned UST 367., 6.2 CARVE-OUT

### loG (FIGURE 5) 

### This CO adjoins CO I-F which contains groundwater that contains VOC contruninants, A 300-foot buffer zone ruound the maximum predicted extent ofthe groundwater plume, as indicated by the groundwater model, is designed to prevent construction ofgroundwater extraction wells that could causethe plume to migrate and impactthe cleanup remedy, Because CO I-G is outside the 300-foot buffer zone and remedial actions me underway for the Site 16 plume, no impact to CO I-G is anticipated,

13January2009 Final Finding ofSuitability to Transfer#4 FormerMCAS EI Toro, California 6.3 CARVE-OUT !I-G (FIGURE 12) Finding ofSuitability to Transfer



### IhisCO borders COs II-H and II-M.. CO II-H is a former landfill site that was closed in 

### 1955
.. Dueto the extent ofthe landfill buffer zone and the fact that the landfill has been closed for an extended peIiod oftime prior to the remediation of CO II-G, there is no danger of landfill contamination spreadingto CO II-G, or any other previously transfell'ed property
.. CO-II-M includes a former skeet range with an extensive buffer zone Due to the fact that the skeet range was closed prior to the remediation ofCO II-G, there is no danger ofpost-transfer contaminationto CO II-G. 6.4 CARVE-OUT 111-0 (FIGURE 15) 

### Ihis CO has a common borderto the south with CO III-B Iheprimary contaminant ofCO 

### III-B is a groundwater plume that is presently under remediation as IRP Site 24 When the Final ROD for OU-I Site 18 and OU-2A Site 24 was completed in 2002 (DON 2002), the updated plume and 500 foot buffer zone were no longer located beneath CO III-D. Consequently, groundwater restrictions due to the Site 24 VOC plume are not applicable to CO III-D. Also, within CO III-B is former LOC IAA 765 immediately adjacent to CO III-D that received regulatoryNFA concmrence on November 17, 1998 (DISC 1998) 7" COVENANTS 

### Ihe deed for transfer of any property on which "any hazardous substance was stored for one year or more, [or] known to have been released, or disposed. "as aresult offormer activities conducted by the US, will include a covenant made pursuant to CERCLA Section 120(h)(3)(A)(ii)(I) and (II) Ihe covenant will warrant "that all remedial action necessary to protect human health and the environmentwith respectto any such substancesremaining on the propertyhas been taken before the date ofsuch transfer" and "thatany additional remedial action found to be necessary after the date of such transfer shall be conducted by the U.S" Ihis covenant will not apply to any remedial action required on COs that is the result ofan act or omission ofthe transferee that causes a newrelease of hazardous substances COs I-L, I-M, I-P, and II-P were only contaminated by petroleum or its derivatives, therefore, COs I-L, I-M, I-P, and II-P shall be conveyed "as is" without a CERCLA covenant 8. ACCESS CLAUSE 

### Ihe deed will reserve and the transferee shall grantto the U.S. (DON and U.S
.. EPA) access to COs I-B, I-E, I-G, I-H, I-I, I-I, II-G, II-I, and III-D pmsuant to CERCLA Section 120(h) (3) (A) (iii) DISC, RWQCB, US. EPA and their successors and assigns shall also be granted access to the COs in any case in which remedial action or cOlI'ective action is found to be necessary after the date of transfer
.. In

### addition, the deed will provide for aright ofaccess for the U S. andRWQCB to traverse property owned by the transferee to gain access to COs I-B and I-M for the on-going petroleum corrective actions

14Janual}'2009 FinalFindingofSuitabilityto Transfer#4 FormerMCAS EI Taro, Califomia 

### 9. FINDING OF SUITABILITY TO TRANSFER FindingofSuftability to Transfer

Based on the information contained 

### in this FOSI and the notices, restrictions, and covenants that will be contained inthe deed, COs I-B, I-E, I-G, I-H, I-I, I-J, I-L, I-M, I-P, II-G, II-I, II-P, and III-D atformer MCAS El Ioroare suitablefor transfer,

Date: Signature: LamaDuchnak DirectorBRAePMO West

15January2009 

### 10.. REFERENCES FinalFinding ofSuitabilityto Transfer#4 FonnerMCAS EI Taro, California FindingofSuitability to Transfer

Califomia Deprutment ofHealth Services. 2006 

### UnreslJicted Release ofFormer Site ofRadium PlaqueAdaptometerBuildingatMCAS EI

### Tor0
.. June 19
.. CalifomiaRegional Water Quality Control Borud (RWQCB). 1995 

### No FurtherAction Concurrence Letterfor UndergroundStorage Tank (USI) 443. December 12. 1995a. 

### No FllltherAction Concurrence Letterfor UndergrmmdStorage Tank (UST) 75A. December 12 

### 1996 No Further Action Concurrence Letter for Underground Storage Tank (USI) 75B March 12 

### 1999
..No FurtherAction ConcunenceLetterfor UndergroundStorage Tank (UST) 47A and 47B August2

___. 2000. 

### No Further Action Concurrence Letter for Aboveground Storage Tank (ASI) 439 August28.

___. 2000a. 

### No FurtherAction Concurrence Letterfor Aboveground Storage Tank (ASI) 651 August28. 2000b 

### No Further Action Concurrence Letter for Oil Water Separator (OWS) 651-8 September28 2000c. 

### No Further Action Concurrence Letter for Vadose Zone Soil oj Undergr'ound Storage Tanks (USTs) 176

### to 183 

### and T-5 ojTankFarm 2. March 27.. 

### 2002
.. No Further Action Concurrence Letter for Aboveground Storage Tank (AST) 47 September 5



## __ -=' 2003 

### No FurtherAction ConcurrenceLetterfor RCRA FacilityAssessment (RF 

### A) Site 213 Febmary20

__ -::' 2004.

### No FlatherAction Concurrence Letterfor Former Undergr'OlmdStorage Tank (USI) Site 392D. June 7



### __ -::.2006 No FurtherAction Concurrence Letterfor Former UndergroundStorage Tank (UST) Site 308 May I. 2006a 

### No Further Action Concurrence Letter for Former Underground Storage Tank (UST) Site 764A and Oil Water Separator (OWS) Site 764B May 16 

### 2007. No Further Action Concurrence Letter for Aerial Photograph Anomaly 118 January 16.

__ -::' 2007a.

### No FurtherAction Concurrence Letterfor Groundwater beneathFormer TankFarm 2 

### ofUndergroundStorage Tanks (USTs) 176

### to 183 

### and**I~5** November 8

__ -::' 2008 

### No FurtherAction Concurrence Letterfor Undergr'Olmd Storage Tank (USI) 75C January 15.

16January2009 FinalFinding ofSuitabilityto Transfer#4 FormerMCAS EI Taro, California Finding ofSuitability to Transfer 2008a 

### No Further Action Concurrence Letter for Former Underground Storage Tank (UST) Site 637-1, 637-2, 

### and637-3. March 12
..

__ -::. 2008b. 

### No Further Action Determinationfor the Unsaturated Soils (Vadose Zone) at the Underground Storage Tank Group 651 

### Release Site, Former Marine Corps Air Station, El Toro, November4

___ 2008c 

### No FurtherAction Concurrence Letterfor UndergroundStorage Tank (USI) 254. December 2
.. Califomia Department ofToxic Substances Control (DISC). 1996. 

### Letter. Acceptance ofClosure Certification Hazardous Waste Storage Area (Building 673-B) 

### Marine Corps Air Station El Toro, SantaAna, California (EPA !DNo. CA 6170023208). March. 1996a 

### No Further Action Concurrence Letter for RCRA Facility Assessment Site 164. July 23. 

### 1998 No Further Action Concurrence Letter for Temporary Accumulation Area 765 November 17.

___.2003. DraftEnvironmental Baseline SUIvey for approval of

### No FurtherAction Concurrence Letterfor PotentialReleaseLocation 651.. April 11.

___. 2003a
.. 

### No Further Action Concurrence Letter for Temporary Accumulation Area 651A Octobet 15. 2003b 

### No Further Action Concurrence Letter for Temporary Accumulation Area 7B. March4 2003c 

### No Further Action Concurrence Letter for RCRA Facility Assessment Site 213. March 3.

__ -:: 2003d.

### No FurtherAction Concurrence Letterfor TemporaryAccumulationArea392A and 392B. March 10.

___ 2003e
.. 

### Concurrence with the FinalEnvironmentalBaseline**Surv~y** 

### datedSeptember 25.

__ -:-.. 2004. 

### No Further Investigation Concurrence Letterfor Potential Release Location 443 Mar·ch23 

### 2005
.. No Further Investigation Concurrence Letter for Potential Release Location 51 November2 2005a. 

### No Further Investigation Concurrence Letterfor Potential Release Location 47 July 13.

__ -::. 2005b 

### No htrther Investigation Concurrence Letter for Potential Release Location 22 July 13 

### 2006. No Further Action Concurrence Letterfor Temporary Accumulation Area 651B June 22

17January2009 FinalFindingofSuitabilityto Transfer#4 FormerMCAS EI Taro, California Finding ofSuitability to Transfer 2006a. 

### No Further Action Concurrence Letter for Tempormy Accumulation A,ea 2 September 6
.. 2006b 

### No Further Action Concunence Letter for Tempormy Accumulation Alea 7. March 16 2006c
.. 

### No Further Action Concunence Letter for Tempormy Accumulation Area 51 August 14. 2006d. 

### No Further Action Concurrence Lettel for Temporary Accumulation A,ea 22 July 31

___. 2006e 

### No Further Action Concurrence Letterfor Underground Storage Tank 764A10il Water Separator764B. July 31.

__ -::-.2007 

### No FurtherAction Concurrence Letterfor AerialPhotographAnomaly (APHO) 118. Malch25

__ --,:. 2008.. 

### No F,"ther Investigation Concurrence with Final Summary Reportfor Group IV PotentialRelease Locations (PRLs), 46, 133, 312, 439, 457, 

### and634. 

### August21. County ofOJange Health Care Agency (OCHCA). 1996 

### Completion oj Tank RemovalProject and No Further Action Requite Letter for Underground Storage Tank (USI) 439A and 439BDecember 9. 1996a. 

### Completion oj Tank Removal Ploject and No Further Action Require Letterfor UndergroundStorage Tank (USI) 693A and693B. November 7 1996b 

### Completion oj Tank Removal Ploject and No Further Action Require Letter for UndelgroundStorage Tank (USI) 46 November 12 1996c. 

### Completion oj Tank Removal Project and No Further Action Require Letter for UndergroundStorage Tank (USI) 392A December 9 

### 1997 Completion ofTank Removal Project and No Furthel Action Require Letter for UndergroundStorage Tank (UST) 651-5, 651-6, 

### and651-7 July II 1997a. 

### Completion ofTank Removal Project and No Further Action Require Letter for Underground Storage Tank (USI) 392B March 14 1997b. 

### Completion ofTank Removal Ploject and No Further Action Require Letterfor UndergroundStorage Tank (USI) 392C July II
.. 

### 1999. Completion oj Tank Removal Ploject and No F,"ther Action Require Letterfor UndergroundStorage Tank (USI) 392E and UST392F December 9. 2004. 

### Completion oj Tank Removal Project and No Further Action Require Letter for UndergroundStorage Tank (USI) 75D. May25 DepartmentofDefense (000). SeeUnited StatesDepartment ofDefEmse Department ofthe Navy (DON). See

## u.s.. Department oftheNavy.

18January2009 FinalFinding ofSuitability to Transfer#4 FormerMCAS EI Taro, California Finding ofSuitability to Transfer 

### Ealth Tech. 2003
.. Final Environmental Baseline Survey, FonnerMaline COIpS Air Station, EI Toro, Califomia. September

___. 2005
.. SummalY RepOltfor GlOUp I Potential Release Locations, Environmental Baseline Survey, Former Maline COlP"Air Station, El Tow, California. February.

---. 2005a
.. SummalYRepOltfm Group IIPotentialRelease Locations, EnvironmentalBaseline Survey, Former Maline COlpSAir Station, El Toro, California MaI·ch.

---.. 2008
.. Draft SummalY RepOltfm Group IVPotential Release Locations, Environmental BaselineSurvey, Former Marine COlpSAir Station, ElTOlO, California March. Intemational Technology (II) COIporation, 1989.Asbestos Survey andAssessment, MCAS, El 1010 March Jacobs Engineering Group (JEG) 1993. Maline COIpS Air Station EI Toro, EI TOIO, Califomia, Installation Restoration ProgJam, Resource Conservation and Recovery Act (RCRA) Facility Assessment RepOit July. 1995. 

### Maline Corps Air Station El Taro, El 10ro, California, Installation Restmation PlOgfam, FinalEnvironmentalBaseline SurveyRepOlt. April 1995a. Maline ColpS Air Station El Tor 0, 

### EI Tor 0, 

### California, Installation Restofation Program Community Environmental Response Facilitation Act Confirmation Sampling Program TechnicalMemorandum
.. March Kennedy/Jenks Consultants 1992. Inventory ofPCB Items and Equipment at Marine ColpS Air Station, El Toro November. Marine COIpS Air Station (MCAS) EI 1010.. 

### 1996. Marine Corps Air Station El 10ro, Wetlands and Waters ojthe UnitedStates August Radian 1996
.. FinalAB2588Air Taxies "Hot Spots" 1995 Inventory ReportforMaline ColpS Air Station El Toro, California, SCAQMDIDNo, 6281. May. US. Depaltment of Defense (DoD). 1994. Department of Defense Policy on the Environmental Review Process to Reach a Finding ofSuitability to Transfer for Property Where Release 01 

### DisposalHas OccUlred 1994a. Asbestos, Lead Paint, and Radon Policies at BRAC Properties MemOlandum for Assistant SecretalY of the Army (Installations, Logistics, and Environment); Assistant SecretalY ofthe Air Force (Manpower, Reserve Affairs, Installations, and Environment); and Director, Defense Logistics Agency From Principle Assistant Deputy Under SecretalY of Defense (Environmental Security). October. 1995 Marine COIpS Air Station EI T 010, 

### EI 1010, 

### Califomia, Installation RestOlation PrograIll, FinalEnvironmental Baseline SurveyRepOlt April. 1997 

### Base Redevelopment and Implementation Manual Office of the Deputy Under SecretalY ofDefense (Industrial Affairs and Installations) December
..

19January2009 FinalFinding ofSuitability to Transfer#4 FormerMCAS EI Taro, California Finding ofSuitability to Transfer 

### 1997a
.. 

### Record of Decisionfor Installation Restoration Program Site 13 

### of Maline Corps AirStation El Toro, Califomia. September 30 

### 2002
.. Record oj Decision, Disposal and Reuse oj Maline Corps Air Station El Taro, Califomia ApriL

___ 2006. 

### Base RedevelopmentandRealignmentManual. Office oftheDeputyUnder Secretary ofDefense (Installations and EnviIOnment).. March. u.S. Department ofthe Navy (DON) 1989
.. Memorandum for 

### IJ Zagrobelny, Commander, Naval Facilities Engineering Command, referencing U.S EPA memorandum on disposal requirements for PCB small capacitors
.. Subject: Disposal of Fluorescent Light Ballasts ContainingPCBs. 1990
.. Southwest Division, Naval Facilities Engineering Command (SWDN). Federal Facility Agreement between the U.s. Marine Corps, U.S EPA Region IX, California Department ofHealth Services, and State Water Resources Control Board

___ .. 1997. 

### FInalRecordof Decision, Operable Units 2A and3A, NoAction Sites, Maline Corps AirStation El Toro, Califomia. Southwest Division, Naval Facilities Engineering Command, San Diego, California
.. September

___ .. 2002. 

### Final Record oj Decision, Operable Unit 1, 

### Site 18

- 

### Regional Volatile Organic Compound Groundwater Plume, Operable Unit 2A, Site 24

- 

### VOC Source Area, Former Maline Carps Air Station El Taro, California Southwest Division, Naval Facilities Engineering Command, San Diego, California June 2004 Final Finding of Suitability to Lease, for Carve-Outs within Parcels I, II, and III, Former Marine Corps Air StationEI Toro, California. July

__ -=: 

### 2004a
.. Final Finding of Suitability to Transfer (Parcel N 

### and Portions ofParcels I, II, and III), FormerMarine Corps Air StationEI Ioro, California. July. United States Environmental PIOtection Agency (U.s. EPA) Region IX 2003. Draft Environmental Baseline Survey (EBS) dated February 7, 2003, Iechnical Information Package ofPotential Release Locations Investigation Results (March 20, 2003), and Iechnical Sheets for Runways and Pesticide Mixing Area (April 3, 2003), FormerMCAS EI Ioro, California April II. 2003a 

### Concurrence Letter for Final Environmental Baseline Survey (EBS) dated April2003. September25.



### ___.2005
.. Concurrence LetterforGroupIIPotentialReleaseLocations including 51 April 7..



### ___.2005a. 

### ConcurrenceLetterfor GroupIPotentialReleaseLocations including 47. Mar·ch 16

__ -::. 2005b. 

### ConcunenceLetterfor DraftFinalRadiologicalRelease Reportfor Former Sites oj RadiumPlaqueAdaptometer BuildingandAirCraftPalts Yard September 12

___ 2005c
.. 

### ConcunenceLetterfor GroupIIPotentialReleaseLocations including22 April? 

### 2008. Concurrence Letter for Group IVPotential Release Locations including PRLs 46, 133, 312, 439, 457, 

### and634. April 17

20January2009 FinalFinding ofSuitabilityto Transfer#4 FormerMCAS EI Taro, California Finding ofSuitability to Transfer United States Marine Corps (USMC)/Southwest Division, Naval Facilities Engineering Command (SWDIV). 1999. 

### Base Realignment and Closure Cleanup Plan, Mmine Corps Air Station, ElTaro, California. March

__ -:-.. 2001 

### Base Realignment and Closure Business Plan, Mmine Corps Air Station, El Taro. Mar·ch.

__ -:-. 2002. 

### Base Realignment and Closure Business Plan, Marine Corps Air Station, El Taro. May



### __ -:;.. 2003. Base Realignment and Closure Business Plan, Mmine Corps Air Station, El Taro. January.

21

## TablesJanuary2009 Fina/Finding ofSuitabilityto Transfer#4 FormerMCAS E/ Toro, California Table 1: Buildings/Structures/Facilities Building/Structurel Carve Out! Facility Number Building/Structure/Facility NamelDescription Tab/e 1

Year of Construction 

### ! Square Feet 1-8 439 ,IBranch Dental/Medical Clinic 1959 

### ! 70,167

______**~**______._____ ____ _ _ __________"

_______ .. __**~__** _ _______ .. _ ....1..-

__ "_.

_______ I-G 7 :,:Storage ' 1943 ' 10,370**_~**____..._.,l.

_________..___ _ ...,

__._._____._..__"

_____. __.

___.

________. ____.."
...._.__ '._..__. _______;..___________..____. 

### , II-I 308 iGround Support Equipment Storage 1944 720 11-1 392 iAircraft Ground Support Equipment 1955 6,400 -----t-·-------·····-----i---···---··---

..------·······-----......-......-.-----.---.........- ····--:··-···------------·-1·-··-·------···---- II-I 764 1984 228 iVehicleWashrack Utility Building**-·---·-··--··,--+---··-··--··--~---··-i----·-·"-·-·----~--.--** ....---..--.----."

...- ...-.-------. -. "--

...- ..**-.-~**.---..**~-----** ..---..-.--..;--.--.- "-

...-.._-.-_...- <1973 i Unknown

......--_.-: .-..--...--....--_.-.-- -··1··-

...--.._._-.-.---.--.- Il-P 637 !Exchange Gas Station ---------"t-

.......-------.---..**-.-.---f---.---.------~-".-.-.-.-----.---** ..-.-.--....-.--.--.- III-D 26 iCommunications Shop 1943 6,240 Note: Buildings/structures/facilities that have been demolished or removed are not shown < before

Page 1of 1January2009 Final Finding ofSuitability to Transfer#4 FonnerMCAS EI Taro, California

Table 2: Environmental Requirements and Notifications Applicable to Property Carve Out Environmental Factors Considered**i~i~i~i~i~i~i~i~iwII~** , !, i':';·**II~I** 

# !**II~P** !**III~D** Presence of Hazardous Substances (Notification) Y Y Y Y Y Y N Y N Y Y N Y CERCLA/RCRA (Response/Corrective Action) Y Y Y Y Y Y N Y N Y Y N Y Presence of Petroleum Products and Derivatives Y N N N Y N Y Y Y N Y Y Y USTIAST Storage Tanks (Closure/Removal) Y N N N Y N Y Y Y N Y Y Y Munitions and Explosives of Concern - Response Actions N N N N N N N N N N N N N Asbestos-Contamlng Matenal Y N N N N N N N N N Y Y N Lead-Based Paint (Non-Residential Buildings) Y N Y N N N N N N N Y Y Y Polychlorinated Biphenyls Y N N N N N N Y N N N N Y Radon YYYYYYYYY YYY Y School Site Considerations Y Y Y Y Y Y Y Y Y Y Y Y Y AST CERCLA N RCRA UST Y aboveground storage tank Comprehensive Environmental Response, Compensation, and Liability Act No Resource Conservation and Recovery Act ::: underground storage tank Yes

Page 1 of 1 Table 2January2009 Final Finding ofSuitabilityto Transfer#4 FormerMCAS EI Taro, California Table 3
Table 3: Potential Release Locations

LOCID Carve-Out I-B PRL 439

PRL443

1--- Building Numberl Location Description Closure Report TitielDate NFl Letter AgencylDate

439 Medical and Dental Draft Summary Report for EPA
- 4/17/2008

Demolished Facility Group IV PRLs by Earth DTSC

_ 8/21/2008 Silver Recovery Unit Tech (March 2008) Technical Memorandum SRU 2, 9/912002, Finai EBS, Sept. 2003, and Information Package Techmcal Memorandum

for SRU 2, 211112004 DTSC
- 3/23/2004 Notes
NFl status identified in Draft Summary Report for Group IV PRLs (Earth Tech 2008) and EPA concurrence obtained. NFl Status identified in DTSC letter dated 8/21112008. PRL 443 is also known as SRU 2 associated with photograph developing equipment in former Building 443. Historical record search, visual inspection, and soil sampling was conducted from 2002 to 2003. NFl status identified in DTSC letter dated 3/23/2004

PRL 651 

### I Demolished Exchange Auto Repair Final EBS (Sept. 2003) by EPA - 4/24/2003 Facility contained hydraulic lifts, hydraulic hOIst pits, and an AST. 

## I Station Earth Tech DTSC - 4/1112003 The building was used as an exchange selVlce station. A utility trench, floor drains and service sink, and parts dip tank were noted during the VSI. Sampling Investigation ofthis facility was conducted In 2003. Contaminant concentrations identified were below action levels. No further action is reqUired per DTSC letter dated 4/11/2003. Carve-Out I-H PRL 51

Carve-Out I-I PRL46

PRL47

Carve-Out I-J Demolished -,-- Automobile Summary Report for EPA - 4/07/2005- 1 \ NFl status identified in Summary Report for Group II PRLs Organization Shop Group II PRLs by Earth DTSC
- 11/02/2005 (Earth Tech 2005a) and regulatory concurrence obtained. All NFl Tech (March 2005a) actions completed.

Demolished Reproduction Office Draft Summary Report for Group IV PRLs by Earth

Tech (March 2008) EPA
- 4/17/2008 DTSC
- 8/21/2008

Demolished Paint and Dope Summary Report for EPA - 3/16/2005 Shop/Paint Booth Group I PRLs by Earth DTSC -7/13/2005 Tech (March 2005)

--- , NFl status identified in Draft Summary Report for Group IV PRLs (Earth Tech 2008) and EPA concurrence obtained. DTSC provided comments on PRL 46 in their Group IV PRLs comments letter dated 4/30/2008. All NFl aclions completed. NFl Status identified in DTSC letierdated 8/21112008. NFl status identified in Summary Report for Group I PRLs (Earth Tech 2005) and regulatory concurrence obtained. All NFl actions completed.
PRL 22 22 Electromcs & Summary Report for EPA - 4/7/2005 PRL 22 was evaluated within the Group I PRL Investigations. DTSC Communications Shop Group I PRLs by Earth DTSC -7/13/2005 and EPA concurred with the NFA recommendation for PRL 22 in Tech (March 2005) letters dated 7/1312005 and 4/712005, respectively.

Page10f2January2009

AST DTSC EBS EPA = ID LOC NFl PRL 

## = Aboveground Storage Tank Department ofToxic Substance Control Environmental Baseline Survey Unites States Environmental Protection Agency Identification Location of Concern No Further Investigation Potential Release Location FinalFinding ofSuitability to Transfer#4 FonnerMCAS EI Toro, Califomia

SRU VSI Silver Recovery Unit Visual site inspection

Page 2 012 Table 3January2009 Table 4: Locations ofConcern

LOC 10**Carve~Out I~B**  RFA 164 Building Number! Location
Demolished Description
VehicleWash Rack 651 FinalFinding ofSu, Jty to Transfer#4 FormerMCAS EI Toro, Califomla

Closure Report Titie/Date
Final RCRA Facility Assessment (RFA)

Report 7/1993 and NFA Letter AgencylDate
DTSC 7/23/1996 Table 4

Notes
inactive vehicle wash rack. Site was identified in the RFA and has been investigated. DTSC concurred with NFA recommendation In a letter dated 7/23/1996. No further action required.

............**~**.•.•. ".-.'.-.-'."'.-.--

...'.'.'.'.'.'

..........j............•.•.•.•.•.•.•... Final Addendum to RFA Report 5/1996 TAA651A Demolished < 90-Day Accumulation POint Summary Report for DTSC 10/15/2003 FormerTAA 651A

10/15/2001 & Information Package on 1n/2003 & 10/8/2003 TM651A was a metal storage shed located northwest quadrant of the Station on the loading dock of Building 651. Sampling results below residential PRGs. DTSC concurred with NFA recommendation in a letter dated 10/15/2003. No further action required

TAA651B Demolished < 90-Day Summary Report for FormerTAA651B DTSC 6/22/2006 Former accumulation area on asphalt-paved area adjacent to Building 651. TAA 651 B is located northwest quadrant ofthe Station. Sampling results below residential PRGs. DTSC concurred with NFA recommendation in a letter dated 6/2212006. No further action reqUired
AST 439 Accumulation Point 

## i ! 10/15/2001 & Information Package on

61712006

...1..........................•__._.___ .•L

...._ .................................................................................................................................... 

## I 439 ! 500-Gallon Summary Report, RWQCB 8/28/2000 Horizontal tank; tank has been removed; no releases identified; NFA Propane Tank Former AST Sites deCISion date of 8/28/2000. No further action reqUired. 245 & 439 7/512000 AST 651 Demolished 1,OOO-Gallon Summary Report, RWQCB 8/28/2000 Horizontal tank; tankformerly situated on west side of Building 651; Propane Tank former AST 651 tank has been removed; no releases identified; NFA decision date of 7/19/1999 8/28/2000. No further action reqUired. UST 439A 439 5,OOO-Galion Fuel Tank Removal Field OCHCA 12/9/1996 Tank removed in 1993. Site closed by OCHCA in a letter dated Oil Tank Activities 12/9/1996. No further action reqUIred. 9/30/1993 _·'·"·"1"·"·'·"·"·"·"·"·" UST 439B 439 5,OOO-Galion Fuel Tank Removal Field OCHCA 12/9/1996 Removal completed 2128/1994. Site closed by OCHCA in a letter Oil Tank Activities dated 12/9/1996. No further action reqUired. 7115/1993 UST 443 Demolished 1,OOO-Galion Diesel Site Assessment RWQCB 12/1211995 Removal completed 212811994. Site closed by RWQCB in a letter Tank Report, UST 443 dated 12/12/1995. No further action required. 911995
Page 1 of 15January2009 Table4: Locations ofConcern

LOCID UST 651-1 Building Numberl Location Demolished Description 12,OOO-Galion Unieaded Fuel Tank Final Finding ofSuitabilityto Transfer#4 FonnerMCAS EI Taro, California Table 4

Closure Report Titie/Date Summary Report, SVE Operations and Confirmation Sampling Activities 2008 NFA Letter AgencylDate RWQCB 11/4/2008

T·· Notes Tank has been removed. Remediation conducted during 2000. Vadose zone SVE treatment has been completed and closure documentation submitted on 2/26/2008. MNA Evaluation and Longterm Monitoring Plan for groundwater submitted on 512912008. RWOCB concurred with NFA recommendation for vadose zone In a letter dated 11/4/2008. Navy will retam access to the site to allow tor ongOing sampling and maintenance ofeXisting groundwater monitOring network. UST 651-2 Demolished 12,OOO-Galion Summary Report, RWQCB 11/4/2008 Tank has been removed. Remediation conducted during 2000. Vadose zone SVE treatment has been completed and closure documentation submitted on 212612008. MNA Evaluation and Longterm Monitoring Plan for groundwater submitted on 512912008. RWQCB concurred with NFA recommendation for vadose zone In a letter dated 1114/2008. Navy will retain access to the site to allow for ongoing sampling and maintenance of eXisting groundwater monitoring network. Unleaded Fuel SVE Operations and Tank Confirmation Sampling Activities 2008

UST 651-3 Demolished 12,OOO-Galion Summary Report, Unleaded Fuel SVE Operations and Tank Confirmation Sampling Activities 2008 1'
.... RWQCB 11/4/2008 Tank has been removed. Remediation conducted dUring 2000. Vadose zone SVE treatment has been completed and closure documentation submitted on 2/26/2008. MNA Evaluation and Longterm Monitoring Plan for groundwater submitted on 5/29/2008. RWQCB concurred with NFA recommendation for vadose zone In a letter dated 11/4/2008. Navy will retain access to the site to allow for ongoing sampling and maintenance of eXisting groundwater monitoring network. UST 651-4 Demolished 12,OOO-Gallon Summary Report, RWQCB 11/4/2008 Tank has been removed. Remediation conducted dunng 2000. Unleaded Fuel SVE Operations and Vadose zone SVE treatment has been completed and closure Tank Confirmation documentation submitted on 2/26/2008. MNA Evaluation and LongSampling Activities term Monitoring Plan for groundwater submitted on 5/29/2008. 2008 RWOCB concurred with NFA recommendation for vadose zone In a letter dated 11/4/2008. Navy will retain access to the site to allow for ongOing sampling and maintenance of eXisting groundwater monitOring network. UST 651-5 Demolished 500-Gallon Waste Tank Removal and OCHCA 7/11/1997 Removal completed on 4/15/1997, Site closed by OCHCA in a letter Oil Tank Site Closure Report, dated 7/11/1997. No further action required. USTs 651-5,651-6, and 651-7 6/12/1997

Page 2 of 15January2009 Table 4: Locations ofConcern

LOCID UST 651-6

UST 651-7

UST693A

UST693B

OWS 651-8

SRU-1

SRU-2

PCB T67 Building Numberl Location Demolished

Demolished

Demolished

Demolished

Demolished

439

Demolished

439 Description 50QMGallon Motor Oil Tank

500-Gallon Motor Oil Tank

500-Gallon Diesel Tank

500-Gallon Diesel Tank

280-Gallon OilM/ater Separator 651

Medical and Dental Facility 439 Silver Recovery Unit

PCBT67 FinalFinding ofSu, '!/y to Transfer#4 FormerMCAS EI Taro, California

Closure Report TillelDate Tank Removal and Site Closure Report, USTs 651-5,651-6, and 651-7 6/12/1997 Tank Removal and Site Closure Report, USTs 651-5,651-6, and 651-7 6/12/1997

Closure ReporUFinal Report, Tank 693A 1/22/1992 Closure Report/Final Report, Tank 693B 1/22/1992 Site Assessment Report, OWS Site 651-8 3/12/1999 Draft Summary Report for Group IV PRLs March 2008 Technical Memorandum SRU

2, September 9, 2002, Final EBS, Sept. 2003, and

Information Package Technical Memorandum for SRU 2, 2111/2004 Final EBS, Sept. 2003 NFA Letter Agency/Date OCHCA 7/11/1997

OCHCA 7/11/1997

OCHCA 11n/1996

OCHCA 11/7/1996

RWQCB 9/28/2000

EPA 4/17/2008 DTSC 8/21/2008 DTSC 3/23/2004

DTSC 9/25/2003 EPA 9/25/2003

Page 3 of 15 Table 4

Notes Removal completed on 4/15/1997. Site closed by OCHCA in a lelter dated 7/11/1997. No further action reqUired.

Removal completed on 4/18/1997. Site closed by OCHCA in a letter dated 7/11/1997. No further action required.

Tank has been removed. Site closed by OCHCA In a letter dated 11/7/1996. No further action required.

Tank has been removed. No evidence of a release was identified. Site closed by OCHCA In a letter dated 11/7/1996. Nofurther action required. OWS was closed in place. OWS was not associated with a UST. Site was investigated, and no significant soil contamination was identified at this site based on the results of soil sampling. Site closed by RWQCB in a letter dated 9/28/2000. No further aclion required. SRU 1was further Investigated as PRL 439. NFl Status identified in Draft Summary Report for Group IV PRLs and EPA concurrence obtained, NFl Status identified in DTSC letter dated 8/21112008. SRU 2 associated with photograph developing eqUipment in Building 443. Historical record search, visual inspection, and soil sampling was conducted from 2002 to 2003 SRU 2 was further evaluated as PRL 443. NFl Status identified in DTSC letter dated 3/23/2004

Removed. 1994 field survey Indicates no evidence of release. No PCB releases identified through the records search orVSls conducted for the 2003 EBS.January2009 Table4: Locations ofConcern

LOCID RAD

Carve-Out I-E TAA2

Carve-Out I-G TAA 7 Building Number! Location Unknown

Demolished

7 Description Suspected Former

Radium Plaque Adaptometer Building was identified on a 1944

drawing as being

situated on 

### "e" Street, approximatelytwo blocks north ofthe

Trabuco Road Station Gate.

< 90-Day Accumulation POlnUHazardous Materials Storage

< 90-Day Accumulation Point FinalFinding ofSuitability to Transfer#4 FormerMCAS EI Toro, California Table 4

Closure Report Title/Date Final Radiological Reiease Report RAD ADAPT Bldg. June 2006

Closure Report For Temporary Accumulation Area

Site 2, Former Marine Corps Air Station, EI Taro, Irvine, California 712006. NFA Letter Agency/Date CDHS 6/19/2006 EPA 9/1212005

DTSC 9/6/2006

Summary Report for DTSC 3/16/2006 FormerTM 7

11/30/2005

Page 4 of 15 Notes i Building may have been part ofadispensary and would have been

used for testing the mght vision of personnel. The only radioactive equipment that would have been used within the facility was a metal disc coated with radium/phosphor compound encapsulated in transparent plastic. Night vision testing was discontinued in 1951. Building may never have been constructed because there was no building number assigned to the building, no construction draWings, and no evidence ofa building (Le., foundation, disturbed soil, etc.). Although, it could not be determined whether the building was ever constructed at former MCAS EI Toro, the 2000 HRA recommended further radiological investigation for the area associated with the footprint ofthis suspected building. During the year 2000, a stationwide HRA was conducted. The HRA recommended further radiological investigation for the Suspected Former Radium Plaque Adaptometer Building prior to final disposition. A radiologIcal survey was completed in 2001 and the results were presented in a Final Radiological Release Report dated June 2006. CDHS agreed with the findings ofthe report and granted NFA including unrestricted release on 6/19/2006.

FormerTM Site 2 consisted oftwo units: Unit 1was approximately 150 feet long by 100 feet wide and was located southwest of Building 2; Unit 2was approximately 100 feet wide by 100 feet wide and was located northeast of Building 2. Visual inspections were conducted and soil samples were collected from eight locations at Former TM Site 2 during 2005. A closure report with a screening risk evaluation was completed in 2006. DTSC concurred with NFA. No further action required.
FormerTAA 7was located northeast of Building 7 nearthe edge of the aircraft parking apron. The site was apprOXimately 10 feet wide by 20 feet long, and paint storage lockers were preViously located on the site. Soil samples were collected from bOrings and Visual Inspections were conducted at FormerTAA 7 during 1995 and dUring 2005. A Summary Report with a screening risk evaluation was submitted in 2005. DTSC concurred with no further action In theIr letter dated 3/16/2006. No further action reqUired.January2009 Table 4: Locations ofConcern

LOCID TAA 7B

Carve-Out I-H Building Number/ Location 7 Description
< 90-Day Accumulation Pomt FinalFinding ofSu" dy to Transfer#4 FonnerMCAS EI Taro, CalifornIa Table 4

Closure Report Title/Date Summary Report, TAA 78 7/17/2002 NFA Leiter AgencylDate DTSC 3/412003 Notes j TM76was located approximately 100 feet southwest of Building 7.

Drums were stored at the site from approximately 1992 through 1996. HistOrical records were reviewed, visual inspections were conducted, and the findings were presented in a Summary Report dated 2002. No further action IS required.
TAA51 Demolished < 90-Day Closure Report DTSC 8/1412006l SWMUlAOC 33, FormerTAA 51 is localed Northeast corner Of

Carve-Out I-I AST47 Demolished

i-- "

................................ UST46
. Demolished Accumulation Pomt FromerTAA 51 i Building 51. Soil sampling was performed A Summary Report with a

25-Gallon Diesel Tank screemng risk evaluation was submitted in 2006. DTSC concurred July 2006 with no further action status for TAA 51 in their letter dated 8/14/2006. No further action required.
Information RWQCB 9/5/2002 Diesel dry tank for boilers, Tank was closed in place, RWQCB Package, AST 47 concurred with NFA in a letter dated 9/5/2002. No further action 5/1/2002 required, 500-Gallon Diesei Closure OCHCA 11/12/1996 Removai completed on 2/6/1992, Site closed by OCHCA in a letter Tank Report/Final Report dated 11/12/1996, No further action required, Tank 461217/1992 UST 47A Demolished 1,500-Gallon Diesel Tank Removal and RWQCB 8/2/1999 Removal completed on 4/10/1997, Sile closed by RWQCB in a letter Tank Site Closure Report, dated 8/2/99. No further action required. UST 47A and 47B 5/18/1998 UST 478 Demolished 1,500-Gallon Diesel Tank Removal and RWQCB 8/2/1999 Removal completed on 4/10/1997. Site closed by RWQCB in a letter

SRU 3A Demolished Tank Site Closure Report, dated 8/2/1999. No further action reqUired. UST 47A and 478 5/18/1998 Reproduction Draft Summary EPA 4/17/2008 Office Report for Group IV DTSC 8/21/2008 PRLs March 2008

Page 5 of 15 SRU 3Awas further Investigated and sampled as PRL 46. NFl status identified in Draft Summary Report for Group IV PRLs and EPA concurrence obtained for NFL NFl Status identified in DTSC letter dated 8/21/2008,January2009 Table 4: Locations ofConcern Building Numberl LOCID Location Description Carve-Out I-J TAA22 Demolished < gO-Day Accumulation POint

Carve-Out l-L UST254 Demolished 1,400-Gallon Fuel Oil Tank Final Finding ofSuitabilityto Transfer#4 FonnerMCAS EI Taro, California Table 4

Closure Report NFA Letter Title/Date Agency/Date Notes
Closure Report, DTSC 7/31/2006 FormerTAA 22 included two units, each with a concrete pad, sump, FormerTemporary and canopy; each unit was approximately 35 feet tong and 15 feet Accumulation Area i wide. TAA 22 was located east of Building 22. A visual inspection 22 i was conducted, soil samples were collected from bOrings during 11/4/2003, 1 2003, and a closure report with a screening risk evaluation was completed. DTSC provided comments In 2006 and a response to comments was completed in 2006. DTSC concurred with no further action In their letter dated 7/31/2006. No further action required.
Closure Report, RWQCB 121212008 Tank has been removed. Excavation activities to remove subsurface

UST 254 & contammated soil have been completed as of 4/21/2008. Additional Addendums of Data groundwater sampling was completed on 9/26/2008. Site closed by Summary RWQCB in a letter dated 12/2/2008. No further action required. November 2008

Page 6 of 15January2009 Table 4: Locations ofConcern

LOCID Carve-Out I-M Building Numberl Location Description FinalFinding ofSu,. ,fyto Transfer#4 FormerMCAS EI Taro, CalifornIa

Closure Report TillelDale NFA Letter Agency/Dale Table 4

Notes
UST 65A Demolished 1,400-Ga[[on Fuel N/A N/A Tank removal completed on 7/19/1997. Site IS under investigation. Oil Tank Further action on gOing. PCB T1 0 Demolished PCB Transformer Final EBS, Sept. DTSC 9/25/2003 Removed. 1994 field sUlvey rndicates no evidence of release. No

PCB T11 Demolished

PCB T12 Demolished

Carve-Out I-P UST75A Demolished
.".".".".".".".".".".+."." UST75B Demolished

UST 75C Demolished

. "."."."."."._.".".".e.".".".e.e.".+_.••.•...._ ..._"._"
...e.". UST75D Demolished -_....j..•. on a Pole. 2003 EPA 9/25/2003 PCB releases identified through the records search orVSls conducted for the 2003 EBS '"""-"-""""""""""""""..,"""" PCB Transformer on a Pole. PCB Transformer on a Pole.

SOO-Gallon Diesel Tank Final EBS, Sept 2003 Final EBS, Sept 2003

Site Assessment Report, UST 75A 8/1995 DTSC 9/25/2003 EPA 9/25/2003 Removed. 1994 field sUlVey rndicates no evidence of release. No PCB releases identified through the records search orVSls conducted forthe 2003 EBS. DTSC 9/25/2003 Removed. 1994 field survey Indicates no evidence of release. No EPA 9/25/2003 PCB releases identified through the records search orVSls conducted for the 2003 EBS.
RWQCB 12/1211995 Removal completed on 21611992. Site closed by RWQCB in a letter daled 12/12/1995. No further action required. 500-Gallon Diesel Site Assessment RWQCB 3/12/1996 Removal completed on 2/611992. Site closed by RWQCB in a letter Tank Report, UST 75B dated 3112/1996. No further action required. 1/1996 

## I 500-Gallon Diesel Site Assessment RWQCB 1/15/2008 Building 75 and loading dockwere demolished during the period of Tank Report, UST 75C April through July 2007. On 7/6/2007 UST 75C was removed and

..".•....•.•...•.......•..••....•." .•.•.•.•.•.• ········r·· 550-Gallon Heating Oil Tank 2007 furhter excavation was conducted to excavate and remove subsurface contaminated soils. Approximately 98 tons of petroleum contaminated soil was removed from the site. A Closure Report was prepared and submitted to RWQCB Santa Ana Region In 2007. Site was closed by the RWQCB in a letter dated 1/15/2008. No Further Action IS reqUired. Removal and OCHCA 5/25/2004 UST 750 was located in Northeast corner of Building 75. Fill pipe Disposal of UST and vent pipe identified in November 2003. Tank exposed and 75D on 3/10/2004 approximately 200 gallons of liquid pumped from tank In December 2003. Remaimng liquid was removed, tank was removed from site, and soil samples were collected in March 2004. A closure report was submitted to OCHCA in April 2004 and NFl letterfrom OCHCA was recevled in May 2004.

Page 7 of 15January2009 Table 4: Locations ofConcern

LOCID Carve·Out II·G Building Numberl Location Description
APHO 118 Demolished Disturbed Ground Perimeter Road FinalFinding ofSuitability to Transfer#4 FonnerMCAS EI Taro, CalifornIa

Closure Report TitlelDate NFA Letter Agency/Date Table 4

Notes Supplementary DTSC 3/25/2007 Identified on a 1979 photograph. A large area ofdisturbed ground

Intormation RWQCB 1/16/2007 (200 by 250 feet) was noted in this photograph. This area IS located Package forAPHO nearAnomaly Area 5, containing APHOs 31, 43, 66, 67, and 68,

118 10/19/2006 Four ofthese anomalies are areas of disturbed ground. After investigation ofAnomaly Area 5, a no further action declaration was granted in February 2003. APHO 118 borders the northeastern end of the Investigation area for lRP Site 5, Penmeter Road Landfill. Due to the proximity ofthis APHO to lRP Site 5, further evaluation ofthis APHO was recommended dUring the development of a remedial program for IRP Site 5. Visual inspections and exploratory trenching was performed atAPHO 118. Based on this Investigations, RWQCB concurred with NFA on 1/16/2007and DTSC concurred with NFA on 4/25/2007.

Page 8 of 15January2009 Table4: Locations ofConcern

LOCID Carve-Out II-I RFA 213 Building Numberl Location

764 Descnption 

### ! Vehicle Wash Rack

TAA 392A 392 < 90-Day

TAA392B 392 Accumulation Pomt

< 90-Day Accumulation POint Final Finding ofSu" dyto Transfer#4 FonnerMCAS EI Taro, California

Closure Report Title/Date
Data Summary Report, Solid Waste Management Unit 21312/13/2002 and

Supplementary

Information Package, Solid Waste Management

Unit (SWMUl 213, Vehicle Washrack at Building 392 12/27/2002 Closure Report, TAA 392A and 392B 2/2712001 NFA Letter Agency/Date
RWQCB 2/20/2003

DTSC 3/312003

DTSC 3/10/2003 Table 4

Notes
RFA 213, an abandoned vehicle wash rack, IS located ad_iacent to the southeastern side of Building 392, The former UST 764A and the former OWS 764B, located adiacent to the northeastern side of the wash rack, were associated with this wash rack. Soil samples were collected from four shallow bormgs through the wash rack during the RFA sampling visit in 1992. Cracks In the wash rack were repaired dUring 199B. Additional soil samples were collected from five bOrings dUring 2002 in response to DTSC comments dated 3/30/2001. Based on sampling results and ascreemng risk evaluation, the RWQCB and DTSC have concurred with recommendation of no further action. No further action is reqUired.
TAA 392A was also known as SWMU/AOC 124, The TAA conSisted of a concrete pad with berm, sump, and canopy, and was located north of Building 392. Soil samples were collected durmg the RFA Sampling Visit in 1992. Additional soit samples were collected durmg November 1999 and the results with ascreenmg risk evaluation were presented in the Closure Report dated 2001. No further action IS required. Closure Report, DTSC 3/10/2003 TAA 392B was also known as SWMU/AOC 271, The TAA consisted TAA392A and 392B 2/27/2001 of aconcrete pad with berm and asump, and was located north of Building 392. Soil samples were collected dunng the RFA Sampling Visit in 1992. Additional soil samples were collected dunng November 1999 and the results with a screening risk evaluation were presented in the Closure Report dated 2001. No further action IS required. UST308 308 2BO-Gallon Diesel Summary Report, RWQCB 5/1/2006 UST 308 was a 280-gallon steel fuel storage tank for the potable water system booster pump in Building 308. The tank site IS located southwest of Building 308 and northeast of Bui[ding 392. UST 308 was removed in March 2003 and confirmation soil samples were collected with OCHCA oversight. The site was referred to the RWQCB by OCHCA on 6/6/2003, Soil samples were collected from three bonngs nearthe former tank excavation mOctober 2004 and the approXimate extent ofthe petroleum-Impacted soils was evaluated. The release appeared to be limited to a relatively small area near the concrete foundation for the former tank. The concrete foundation and approXimately 10 tons of petroleum-Impacted soils were excavated and removed in July 2005. The RWQCB aSSIgned Geotracker [0 T0605921683 to Former UST Site 308. No further action is required. Tank Former UST Site 308 11/18/2005

Page 9 of 15January2009 Table 4: Locations ofConcern

LOCID UST392A

UST392B Building Numberl Location

392

392 •.•---._.-•.j

... Description 500-Gallon Unleaded Fuel Tank

2,000-Galion Gasoline Tank FinalFinding ofSuitability to Transfer#4 FormerMCAS EI Taro, California Table 4

Closure Report TitlelDate Tank Removal Field Activities 8115/1993 NFA Letter Agency/Date OCHCA 1219/1996 Notes UST 392A (also known as SWMU/AOC 298) and approximately 22 feet ofassociated PIPing were removed on 7/15/1993 under OCHCA plan check 92-283. The tank was located near the former boiler room at Building 392. Site closed by OCHCA in a letter dated 12/9/96. No further action required. Tank Removal Field OCHCA 3/14/1997 UST 392B was removed on 12/18/1987. Activities Site closed by OCHCA in a letter dated 3/14197. No further action 

### ! 12/18/1987 required. UST 392C 392 

## i 400-Gallon Diesel Tank Removal and OCHCA 7/11/1997 UST 392C was removed on 3/12/1997 under OCHCA plan check

UST392D 392

UST 392E 392

.- •.•.•.•.•;.... UST392F 392 Tank Site Closure Report, 96-193. The tank was located northeast of Building 392.

2,000-Galion Gasoline Tank

2,000-Galion Gasoline Tank UST392C 6/20/1997

._._._..j

.... Addendum Number 2 to Site Assessment Report, Former Underground ! Storage Tank 3920 i

Site 2/26/2004

USTRemoval Report, UST392E 10/27/1999 Site closed by OCHCA in a letierdated 7/11/97. No further action required. RWQCB 6/7/2004 UST 3920, aformer diesel fuel storage tank, was removed in approXimately 1987. A new fiberglass tank, UST 392F, was installed at the location of Former UST 3920, and UST 392F was removed with OCHCA oversight and closed in 1999. Soil samples were collected from several bOrings dUring the site assessment activities that were conducted at Former UST Site 392D during the penod from 1999through 2002. The vertical extent of the release IS approximately 60 feet below ground surface based upon the results ofthe site assessment sampling activities. A site assessment addendum with an evaluation ofthe leaching potential of residual petroleum hydrocarbons was completed in 2004, and the RWQCB concurred with no further action status In their letter dated 6/7/2004. The RWOCB assigned Case Number 083003998T to Former UST i Site 392D. No further action reqUired. •.....•....•.•.., ................................................, ........................•.•................................ OCHCA 12/9/1999 UST 392E, the fuel dispensing Island, and approximately 30 feet of associated piping were removed on 9/9/1999. The tank was located south of Building 392. OCHCA closed the site on 12/9/1999. No further action IS required. 2,OOO-Gallon UST Removal OCHCA 12/9/1999 UST 392F, the fuel dispenSing Island, and approximately 30 feet of Gasoline Tank Report, UST 392F associated piping were removed on 9/9/1999. The tank was located 10127/1999 along the southwestern side of Building 392. OCHCA closed the site on 12/9/1999. No turther action is required.

Page 10 of 15Final Finding ofSuo tyto Transfer#4 January2009 FonnerMCAS EI Taro, California Table 4 Table 4: Locations ofConcern

LOC 10 UST764A Building Numberl Closure Report NFA Letter Location Description Title/Date Agency/Date Notes

764 500-Gallon Waste Summary Report for RWQCB 5/16/2006 UST 764A (SWMU 214) and OWS 764B (SWMU 215) were located Oil Tank Former UST 764A OTSC 7/31/2006 adiacent to SWMU 213 (a wash rack located adiacent to the and OWS Site 7648 southeast end of Building 392 near Building 764). Soil samples were Site 12/1/2005 collected adiacent to UST764A dUring the RFA Sampling Visit in 1992. UST764A, OWS 764B, and approXimately 6 feet of associated piping were removed on 8/9/1999 with overSight by the OCHCA. Soil samples were collected from four borings dUring site assessment activities In 2000. Additional soil samples were collected from a boring nearthe center ofthe former tank excavation In 2005. The RWQCB concurred with NFAfor UST 764A10WS 764B on 5/16/2006, and OTSC concurred with NFA on 7/31/2006. The RWQCB aSSigned Geotracker 10 T0605968363 to Former UST Site 764AfOWS Site 7648. No further action required. OWS 764B 764 100-Gallon OillWater Seperator Summary Report for Former UST 764A and OWS Site 764B RWQCB 5/16/2006 DTSC 7/31/2006 UST 764A (SWMU 214) and OWS 764B (SWMU 215) were located adiacent to SWMU 213 (a wash rack located adiacent to the southeast end of Buitding 392 near Building 764). Soil samples were collected adjacent to UST 764A dunng the RFA Sampling Visit in 1992. UST764A, OWS 764B, and approximately 6 feet of associated piping were removed on 9August 1999 with oversight by the OCHCA. Soil samples were collected from four bonngs dunng site assessment activities In 2000. Additional soil samples were collected from a baring near the center ofthe formertank excavation in 2005. The RWQCB concurred with NFA for UST 764A10WS 764B on 5/16/2006, and DTSC concurred with NFA on 7/31/2006. The RWQCB assigned Geotracker ID T0605968363 to Fonner UST Site 764A10WS Site 764B. No further action reqUired. Sile12/1/2005

Page11of15January2009 Final Finding ofSuitability to Transfer#4 FormerMCAS EI Taro, CalifornIa Table 4 Table4: Locations ofConcern

LOCID Carve-Out II-P AST637 Building Numberl Location

637 Description
500-Gallon Propane Tank

-""j"-"""-"""-""-""-"""""-""-""-"-"-""" ·"t""" Closure Report Title/Date
Information Package, Aboveground Storage Tank 637 10/24/2001 NFA Letter AgencylDate
DTSC approval of Sep, 2003 EBS on 9/2512003 EPA 9/25/2003 Notes
AST 637, used for storage of propane, was removed on apprOXimately 2/28/1999. No releases identified; no further action required; Determination of NFA was by concurrence with the 2003 EBS. No further action required. The Information Package published on 10/24/2001 is not a Closure Report. It was prepared subsequent to obtammg NFA concurrence to document and track the closure process. UST 637-1 637 12,OOO-Galion Unleaded Fuel Tank Summary Report RWQCB 3/1212008 UST 637-1, UST637-2, & UST 637-3 and approximately 836 feet of

UST 637-2

UST637-3 Former UST 637-1, associated piping were removed on 8/19/1999 under OCHCA plan 2, and 3 dated check PM99·054. Field activities are documented in the 12/27/07 "Underground Storage Tank Removal Report, USTs 637-1, 637-2, 637·3, Marine Corps Air Station, El Toro, California" (Geofon 10/27/1999). Additional remedial excavation activities were conducted in October 2007 by ECS and Summary Report was submitted in December 2007. The RWQCB concurred with NFA on 3/12/2008. 637 12,OOO-Galion See Notes for UST RWQCB 3/1212008 See Notes for UST 637-1, Unleaded Fuel 637-1. Tank 

## i 637 12,OOO-Galion See Notes for UST RWQCB 3/12/2008 

## I See Notes for UST 637-1. Unleaded Fuel 637-1, Tank

Page 12 of 15January2009 Table 4: Locations ofConcern

LOCID Carve-Out 111-0 IRP 13

UST 176

UST 177 Building Numberl Location

Demolished

.•.•.•.•.•.•.**-.-.-~,.-** .•. 26

26

UST178 26 Descnption
Oil Change Area (OU-3)

25,000-Galion Aviation Gas, Wastewater Tank

50,000-Galion AViation Gas, Wastewater, Fuel Oil Tank

50,000-Galion AViation Gas, Wastewater, Fuel Oil Tank FinalFindingofSu., Ay to Transfer#4 FormerMCAS EI Taro, CalifornIa Table 4

Closure Report Title/Date
Draft Final Record of Decision, 

### au 2A

& 3A, No Action Sites 9/30/1997 NFA Letter Agency/Date
EPA,DTSC,

RWQCB 9/30/1997 Notes
Releases of crankcase oil. Site was In operation from 1977-1983. ROD signed in September 1997.

•.+_..__._----_._----_........ - ..**~**..-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-. Site Assessment

. and Remedial 

### i Action Report, Tank Farm 2 4/24/1998 and Information Summary

Site Assessment

and Remediai Action Report, Tank

Farm 2 4/24/1998

Site Assessment

and Remedial Action Report, Tank

Farm 2 4/24/1998 RWQCB 3/27/2000 for Soil and RWQCB 11/8/2007for Groundwater

RWQCB 3/27/2000 for Soil and RWQCB 1118/2007for Groundwater UST 176 was constructed in 1943. UST 176 and other tanks at FormerTank Fanm 2 (USTs 176 -183) were removed in 1995 under OCHCA plan check 9S R099. Excavation oftanks and PIPing occurred dUring August through December 1995. SVE removed approximately 78,000 pounds of petroleum hydrocarbons from the vadose zone at Tank Farm 2 dunng the penod from 1 October 1996 through 11117/1997. The RWQCB concurred with no further action for the vadose zone In the letterdated 3/27/2000, On 11/8/2007, the RWQCB concurred with no further action for groundwater beneath FormerTank Farm 2 (USTs 176-183 and USTT-5) UST 177 was constructed in 1943. UST 177 and othertanks at Former Tank Farm 2 were removed in 1995 under OCHCA plan check 95 R099. Excavation oftanks and piping occurred during August through December 1995. SVE removed approximately 78,000 pounds of petroleum hydrocarbons from the vadose zone at Tank Fanm 2 during the period from 10/1/1996through 11/17/1997, The RWQCB concurred with no further action for the vadose zone In the letterdated 3/2712000, On 11/8/2007, the RWQCB concurred with no further action for groundwater beneath FormerTank Farm 2 (USTs 176-183 and USTT-5), RWQCB 3/27/2000 UST 178 (also known as SWMUJAOC 48) was constructed in 1943, for Soil and RWQCB UST 178 and other tanks within the Former Tank Farm 2 were 11/8/2007for removed in 1995 under OCHCA plan check 95 R099. Excavation of Groundwater tanks and piping occurred during August through December 1995. SVE removed approximately 78,000 pounds of petroleum hydrocarbons from the vadose zone at Tank Farm 2 dUring the period from 10/1/1996through 11117/1997, The RWQCB concurred with no further action for the vadose zone In the letter dated 3/2712000, On 11/8/2007, the RWQCB concurred with no further action for groundwater beneath Former Tank Farm 2 (USTs 176-183 and USTT-5),

Page 13 of 15January2009 Table 4: Locations ofConcern

LOC 10 UST 179

UST 180

UST 181

UST 182 Building Number! Location 26

26

26

26 t Description 25,OOO-Galion AViation Gas, Wastewater, Fuel 011 Tank

50,OOO-Galion AViation Gas, Wastewater Tank Final Finding ofSuitabilityto Transfer#4 FonnerMCAS EI Taro, California Table 4

Closure Report Title/Date Site Assessment

and Remedial Action Report, Tank

Farm 2 4/24/1998

Site Assessment

and Remedial Action Report, Tank

Farm 2 4/24/1998 NFA Letter Agency/Date RWQCB 3/27/2000 for Soil and RWQCB 11/8/2007for Groundwater Notes UST 179 (also known as SWMU/AOC 49) was constructed in 1943, UST 179 and othertanks within the Fonner Tank Farm 2 were removed in 1995 under OCHCA plan check**95~099.** Excavation of tanks and piping occurred during August through December 1995. 

### i SVE removed approximately 78,000 pounds of petroleum

. hydrocarbons from the vadose zone at Tank Farm 2 durmg the

penod from 10/1/1996through 11117/1997. The RWQCB concurred with no further action for the vadose zone in the letter dated 3/2712000, On 11/8/2007, the RWQCB concurred with no further action for groundwater beneath FormerTank Farm 2 (USTs 176-183 and USTT-5) RWQCB 3/27/2000 UST 180 (also known as SWMU/AOC 51) was constructed in 1943. for Soil and RWQCB UST 180 and othertanks within the Former Tank Farm 2were 1118/2007 for removed in 1995 under OCHCA plan check 95-099. Excavation of Groundwater tanks and pipmg occurred dUring August through December 1995. SVE removed approXimately 78,000 pounds of petroleum hydrocarbons from the vadose zone at Tank Farm 2 dUring the period from 11/1/1996through 11/17/1997. The RWQCB concurred with no further action for the vadose zone in the letter dated 27 March 2000. On 8 November2007, the RWQCB concurred with no further action for groundwater beneath FormerTank Farm 2 (USTs 176-183 and USTT-5). 50,OOO-Galion Site Assessment RWQCB 3/27/2000 UST 181 was constructed in 1943. UST 181 and othertanks within AViation Gas, and Remedial for Soil and RWQCB the Former Tank Farm 2were removed in 1995 under OCHCA plan Wastewater, Fuel Action Report, Tank 11/8/2007for check 95-099. Excavation oftanks and plpmg occurred dunng Oil Tank Farm 2 4/24/1998 Groundwater August through December 1995. SVE removed approximately 78,000 pounds of petroleum hydrocarbons from the vadose zone at Tank Farm 2 dUring the penod from 10/1/1996 through 11117/1997. The RWQCB concurred with no further action forthe vadose zone In the letter dated 3/2712000. On 11/8/2007, the RWQCB concurred with no further action for groundwater beneath FormerTank Farm 2 (USTs 176-183 and USTT-5), 50,OOO-Galion Site Assessment RWQCB 3/27/2000 UST 182 (also known as SWMU/AOC 52) was constructed in 1943. AViation Gas, and Remedial for Soil and RWQCB UST 182 and the other tanks within the FormerTank Farm 2were Wastewater, Fuel Action Report, Tank 11/8/2007for removed in 1995 under OCHCA plan check 95-099. Excavation of Oil Tank Farm 2 4/24/1998 Groundwater tanks and piping occurred during August through December 1995.

Page 14 of 15 SVE removed approximately 78,000 pounds of petroleum hydrocarbons from the vadose zone at Tank Farm 2 during the period from 1011/1996through 11/17/1997. The RWQCB concurred with no further action for the vadose zone In the letter dated 3/27/2000. On 11/8/2007, the RWQCB concurred with no further action for groundwater beneath FormerTank Farm 2 (USTs 176-183 and USTT-5).January2009 Final Finding ofSc "lityto Transfer#4 FormerMCAS EI Taro, California Table 4 Table4: Locations ofConcern

LOC1D UST 183

UST T-5

AOC APHO AST = AVGAS BRAC = CDHS DTSC EBS ECS EPA EX FS = GW HRA 10 = IRP = JP-5 < LOC Building Numberl Location Description Closure Report Title/Date NFA Letter AgencylDate Notes 26 25,OOO-Galion Site Assessment- 1 RWQCB 3/27/2000 UST 183 was constructed in 1943. UST 183 and the other tanks within the Former Tank Farm 2were removed in 1995 under OCHCA plan check 95-099. Excavation oftanks and piping occurred dUring August through December 1995. SVE removed apprOXimately 78,000 pounds of petroleum hydrocarbons from the vadose zone at Tank Farm 2 dUring the penod from 10/1/1996 through 11/17/1997. The RWQCB concurred with no further action for the vadose zone In the letter dated 3/2712000, On 11/8/2007, the RWQCB concurred with no further action for groundwater beneath FormerTank Farm 2 (USTs 176-183 and USTT-5). Aviation Gas, and Remedial for Soil and RWQCB Wastewater, Fuel Action Report, Tank 11/8/2007for Oil Tank Farm 2 4124/1998 Groundwater

26

Area of Concern 

### , 2,OOO-Galion Waste JP-5 Tank

Aerial Photograph Anomaly aboveground storage tank aViation gasoline Base Realignment and Closure California Department of Health Services Department ofToxIc Substances Controi Environmental Baseline Survey Envlro Compliance Solutions Inc. Environmental Protection Agency Excavation Feasibility Study groundwater historical radiological assessment Identification Installation Restoration Program Jet Propulsion Fuel, Grade 5 less than Location of Concern Site AssessmenU Closure Report,

UST Site T-5

11/4/1997

LQ MCAS MNA = MPE = MSC NA N/A RWQCB 3/27/2000 for Soil and RWQCB 11/8/2007l0r Groundwater

Liquid Manne Corps Air Station USTT-5, also known as SWMUlAOC 17, was located within the FormerTank Farm 2. USTT-5 was removed on 11/27/1995 and confirmation soil samples were collected under OCHCA plan check 95-099. Additional sampling was conducted during the site assessment ofTank Farm 2. The RWQCB concurred with no further action status on 11119/1997. On 11/8/2007, the RWQCB concurred with no further action for groundwater beneath FormerTank Farm 2 (USTs 176-183 and USTT-5). RAD radiological RCRA Resource Conservation and Recovery Monitored Natural Attenuation Act Multiple Phase Extraction RI Remedial Investigation miscellaneous RD/RA Remedial Deslgn/Remedial Action not applicable RFA RCRA FacilityAssessment not available ROD Record of Decision NAVFAC Southwest = RWQCB Regional Water Quality Control Board

Naval Facilities Engineering Command, Southwest SAIC = SCience Applications International NFA = No FurtherAction Corporation NFl = No Further Investigation SRU = Silver Recovery Unit OCHCA = Orange County Health Care Agency ST = Stain OHM OHM Remediation Services Inc. SVE Soil Vapor Extraction OPS Operating Properly and Successfully SWMU Solid Waste Management Unit OU = Operable Unit TM = Temporary Accumulation Area OWS = oil/water separator UST = underground storage tank PCB polychlorinated biphenyl VSI visual Site Inspection ppm part per million PRG preliminary remediation goal PRL Potential release Location

Page 15 of 15Final Finding ofSu., ,y to Transfer#4 January2009 FonnerMCAS EI Taro, California Table 5 Table 5: Locations ofConcern With On-going Petroleum Corrective Actions

LOC 10 Carve-Out 1-8 UST 651-1

UST651-2

UST651-3

UST651-4

Carve-Out I-M UST65A Description Closure Report TitielDate NFA Letter AgencylDate Notes
12,OOD-Gallon Unleaded Fuel Tank Summary Report, RWOCB 1114/2008 Tank has been removed. Remediation conducted dunng 2000. 

# L I 12,000-Galion Unleaded Fuel Tank 

## I SVE Operations Vadose zone SVE treatment has been completed and closure and Confirmation documentation submitted on 2126/2008. MNA Evaluation and LongSampling Activities term Monitoring Plan for groundwater submitted on 5/29/2008. RWQCB concurred with NFA recommendation in a letter dated 2008 11/4/2008. Navywill retain access to the site to allowfor ongoing
Summary Report, SVE Operations and Confirmation Sampling Activities 2008 sampnng and maintenance of eXisting groundwater monitoring network. RWQCB 11/4/2008 Tank has been removed. Remediation conducted during 2000. Vadose zone SVE treatment has been completed and closure documentation submitted on 2/26/2008. MNA Evaluation and Longterm Monitoring Plan for groundwatersubmitted on 5/29/2008. RWQCB concurred with NFA recommendation In a letter dated 11/4/2008. Navy will retain access to the site to allowfor ongoing 

# I 

# i sampling and maintenance ofeXisting groundwater monitoring network. 12,OOO-Gallon Unleaded Fuel Tank 

### ! Summary Report, RWQCB 11/4/2008 Tank has been removed. Remediation conducted during 2000. SVE Operations Vadose zone SVE treatment has been completed and closure and Confirmation documentation submitted on 2/26/2008. MNA Evaluation and LongSampling Activities term Monitoring Plan for groundwatersubmitted on 5/29/2008. RWQCB concurred with NFA recommendation In a letter dated 2008 11/4/2008. Navy will retain access to the siteto allow for ongOing sampling and maintenance ofeXisting groundwater monitoring network. 12,OOO-Galion Unleaded FuelTank Summary Report, RWQCB 11/412008 Tank has been removed. Remediation conducted dunng 2000.

1,400-Gallon Fuel Oil Tank SVE Operations Vadose zone SVE treatment has been completed and closure and Confirmation documentation submitted on 2/26/2008. MNA Evaluation and LongSampling Activities term Monitoring Plan for groundwater submitted on 5/29/2008. 2008

NfA

Page10f2NfA RWQCB concurred with NFA recommendation In a letter dated 11/4/2008. Navywill retain access to the siteto allow for ongOing sampling and maintenance ofeXisting groundwater monitOring network.

Tank Removal completed on 7/19/1997. Site IS under investigation. Further action on gOing.January2009 Final Finding ofSuitability to Transfer#4 FormerMCAS EI Toro, California Table 5: Locations ofConcern With On-going Petroleum Corrective Actions

LOCID 10 LOC 

## = MNA 

## = N/A 

## = NFA 

## = RWQCB SVE UST Description Identification Locations of Concern Monitored Natural Attenuation not available No Further Action Regional Water Quality Control Board Soil Vapor Extraction underground storage tank Closure Report TitlelDate NFA Letter AgencylDate

Page 2 of2 Table 5

NotesJanuary2009 Table 6: Summary ofAsbestos Surveys Final Finding ofSuitability to Transfer#4 FormerMCAS EI Taro, California
Building
---- -- r Squa-re!
-- ------.- Historical Asbestos Survey Carve-Out 10 Number Description Feet Year Built Information Comments**~-----** ! I-B 

# I 439 

## ! Branch Medical/Dental Clinic 70,167 1959

I-G 7 Storage 10,370 1943 IT Corp (1989): Transite, vibration FAD ACM found. dampener, pipe Insulation, duct Insulation. Pipe Insulation & mastic, cement panels (assumed), pipe elbows, floortile & mastic, stucco, boiler insulation, duct connector. On 8/1/2000
- 8/3/2000: FAD debris at sink room 138 (168 on floor plan). FAD in basement mechamcal rooms. FAD in stallWell, 2nd floor. Suspect FAD wall plaster and surfacmg rooms 212 & 214 (236 & 238 on floor plan). Suspect damaged above drop ceiling I in hallway outside room 232 (256 on 

## I Iloor plan).

IT Corp (1989): No ACM Found I No ACM lound Table 6

II-I 308 Ground Suport EqUipment Shop 720 1944 IT Corp (1989): Floortile Non-FAD ACM found; not sUlVeyed since 1997. II-I
II-I II-P

III-D < ACM FAD ID 392
764 637

26 Air Craft Ground Suport Equipment Shop 6,400 1955 IT Corp (1989): Duct insulation, pipe Insulation FAD ACM found
Vehicle Washrack Utility Building 228 1984 Not Surveyed 

### I Not Surveyed Exchange Gas Station Unknown <1973 Not Surveyed Not Surveyed
Communications Shop before asbestos-containing matenal friable, accessible, and damaged Identification 6,240

Page 1 of 1 1943 IT Corp (1989): No ACM Found NoACMloundJanuary2009 Final Finding ofSuitability to Transfer#4 FormerMCAS EI Taro, California Table 7: Monitoring/Bioventing/SVEWells Carve Out Well 10 I-B 651 MW-01 I-B 651 MW-02 I-B I-B I-B I-B I-B I-B I-B 651 MW-03 651 MW-04 651 MW-05 651 MW-06 651 ROI-1 651 ROI-2 651 ROI-3 I-B 651 SVE 1A I-B 651 SVE 1C I-B 651 SVE 2B I-B 651 SVE 20 I-B 651 SVE 3 I-B 651 SVE 4A I-B 651 SVE 4D I-B 651 SVE 5 I-B 651 SVE 6 I-B 651 SVE 7 ID = Identification MW Monitoring WeI! ROI Radius of Influence SVE Soil Vapor Extraction

Page 1 of 1 Table 7