Appendix 

El Toro Former Marine Corps Air Station (MCAS) 

El Toro, California: 

No Further Action Determinations Associated with Locations o

Organized by Finding of Suitability to Transfer (FOST

2013
LEGAL_US_W # 74606800.1 

FOST #1: Locations of Concern
LEGAL_US_W # 74606800.1 

FOST #1

Locations of Concern Within Transfer Parcels I-A, II-A, and III-A 

Transfer 

parcel LOC ID 

Building 

Number/Location Description 

Closure 

Report 

Title/Date NFA Letter Agency/Date Notes 

Navy Sale Parcel I I-A TAA 10 10 < 90-Day Accumulation Point Closure 

Report, 

TAA 10 

11/7/2002 

by 

IT 

DTSC 

3/4/2003 

SWMU/AOC 27. Samexceeded residential Additional sampling win September 2002. Cdid not exceed PRGsscreening results, DTwith NFA in a letter daThe 2002 VSI conducof the EBS did not idesigns of a release. No required. 

I-A TAA 77 77 < 90-Day Accumulation Point Closure 

Report, 

TAA 77 

12/23/1998 

by 

OHM 

DTSC 

3/9/1999 

Regulatory agency coNFA recommendation obtained. No further a

I-A TAA 289 289 < 90-Day Accumulation Point Closure 

Report, 

Former TAA 

289 

3/28/2001 

by 

OHM 

DTSC 10/10/2003 SWMU/AOC 70. Sam

indicated concentratiocontaminants betweeand industrial PRGs; human health risk anaconducted based on fBased on risk screeniDTSC concurred with dated 10/10/2003. No required. 

I-A TAA 626 626 < 90-Day Accumulation Point Summary 

Report, 

TAA 626 

8/15/2001 

by 

NAVFAC EFD

Southwest 

DTSC 

 8/20/2001 

SWMU/AOC 158. Sumprepared 15 August 2recommended NFA aconcurrence obtainedaction required. 
LEGAL_US_W # 74606800.1 

FOST #1

Locations of Concern Within Transfer Parcels I-A, II-A, and III-A 

Transfer 

parcel LOC ID 

Building 

Number/Location Description 

Closure 

Report 

Title/Date NFA Letter Agency/Date Notes 

I-A APHO 1 Tank Farm 

No. 3 

Stains and Wet Soil Summary 

Report 

and Summary 

Report 

Addendum, 

APHO 1 

1/27/2000 and

4/11/2000 

by 

NAVFAC EFD

Southwest 

DTSC 7/6/2000 

RWQCB 10/18/2000 

The review of historicaand maps and site insincluding the 2002 VSpart of the EBS, were part of this site evaluasampling results obtaremoval of Tank Farm to be below residential result, regulatory agenof NFA recommendatiobtained. No further a

I-A APHO 58 Tank Farm 

No. 3 

Open Storage Area Summary 

Report, 

APHOs 23, 

27, 58 (Area 

2) 3/7/2000 

by 

NAVFAC EFD

Southwest 

RWQCB 10/18/2000 Sampling results belo

PRGs. Site evaluated Area 2. Regulatory agconcurrence of NFA rhas been obtained. Nrequired. 

Navy Sale Parcel II II-A RFA 46 163 Vehicle 

Maintenance 

and 

Parking/DRMO 

Closure 

Report, 

SWMU 46 

5/28/1999 by

OHM 

and 

Supplement to

Closure 

Report, 

SWMU 46 by

OHM 

DTSC 8/10/1999 TRPH was identified d

sampling visit. DTSC NFA in a letter dated further action required
LEGAL_US_W # 74606800.1 

FOST #1

Locations of Concern Within Transfer Parcels I-A, II-A, and III-A 

Transfer 

parcel LOC ID 

Building 

Number/Location Description 

Closure 

Report 

Title/Date NFA Letter Agency/Date Notes 

II-A APHO 12 DRMO Yard 

No. 2 

Stains and Wet Soil Summary 

Report, 

APHO 12 

11/15/1999 

by 

NAVFAC EFD

Southwest 

DTSC 2/1/2000 

RWQCB 10/18/2000 

No evidence of stainiidentified during 2002 in support of the EBS. detection of constitueat surrounding LOCs. agency concurrence orecommendation has bNo further action requ

II-A APHO 31 Golf Course – 

Hole No. 5 

Disturbed Ground and 

Excavation Summary Report, 

Anomaly Area 

5 (APHOs 31, 

43, 66, 67, & 

68) 11/1/2000 

by OHM 

and 

Addendum to

Summary 

Report, 

Anomaly Area 

5 5/9/2001 

by OHM 

DTSC 2/11/2003 

RWQCB 10/11/2001 

Geophysical survey asampling were conducGeophysical survey respossible debris, which be interference from and roadbed materiaresults indicated concbelow PRGs. No eviground disturbance id2002 VSI conducted the EBS. Regulatory concurrency of NFA rehas been received. SiAnomaly Area 5. No frequired. 

II-A APHO 43 Golf Course – 

Hole No. 5 

Disturbed Ground and 

Excavation 

Summary 

Report, 

Anomaly Area 

5 (APHOs 31, 

43, 66, 67, & 

68) 11/1/2000 

by OHM 

and 

Addendum to

Summary 

Report, 

Anomaly Area 

5 5/9/2001 

by OHM 

DTSC 2/11/2003 

RWQCB 10/11/2001 

Geophysical survey asampling were conducGeophysical survey respossible debris, which be interference from and roadbed materiaresults indicated concbelow PRGs. No evidground disturbance id2002 VSI conducted the EBS. Regulatory concurrency of NFA rehas been received. SitAnomaly Area 5. No furequired. 
LEGAL_US_W # 74606800.1 

FOST #1

Locations of Concern Within Transfer Parcels I-A, II-A, and III-A 

Transfer 

parcel LOC ID 

Building 

Number/Location Description 

Closure 

Report 

Title/Date NFA Letter Agency/Date Notes 

II-A APHO 66 841 Disturbed Ground and 

Excavation 

Summary 

Report, 

Anomaly Area 

5 (APHOs 31, 

43, 66, 67, & 

68) 11/1/2000 

by 

OHM 

and 

Addendum to

Summary 

Report, 

Anomaly Area 

5 5/9/2001 

by OHM 

RWQCB 10/11/2001 

DTSC 2/11/2003 

Geophysical survey asampling were conducGeophysical survey respossible debris, which be interference from and roadbed materiaresults indicated concbelow PRGs. No evidground disturbance id2002 VSI conducted the EBS. Regulatory concurrency of NFA rehas been received. SitAnomaly Area 5. No furequired. 

II-A APHO 67 841 Disturbed Ground and 

Excavation Summary 

Report, 

Anomaly Area 

5 (APHOs 31, 

43, 66, 67, & 

68) 11/1/2000 

by OHM 

and 

Addendum to

Summary 

Report, 

Anomaly Area 

5 5/9/2001 

by OHM 

DTSC 2/11/2003 Geophysical survey a

sampling were conducGeophysical survey respossible debris, which be interference from and roadbed materiaresults indicated concbelow PRGs. No evidground disturbance id2002 VSI conducted the EBS. Regulatory concurrency of NFA rehas been received. SitAnomaly Area 5. No furequired. 
LEGAL_US_W # 74606800.1 

FOST #1

Locations of Concern Within Transfer Parcels I-A, II-A, and III-A 

Transfer 

parcel LOC ID 

Building 

Number/Location Description 

Closure 

Report 

Title/Date NFA Letter Agency/Date Notes 

II-A APHO 68 841 Open Storage Area Summary 

Report, 

Anomaly Area 

5 (APHOs 

31, 43, 66, 

67, & 

68) 11/1/2000 

by 

OHM 

and 

Addendum to

Summary 

Report, 

Anomaly Area 

5 5/9/2001 

by OHM 

RWQCB 10/11/2001 

DTSC 2/11/2003 

Geophysical survey asampling were conducGeophysical survey respossible debris, which be interference from and roadbed materiaresults indicated concbelow PRGs. No evidground disturbance id2002 VSI conducted 

the EBS. Regulatory concurrency of NFA rehas been received. SitAnomaly Area 5. No furequired. 

II-A APHO 85 294 Trench Information 

Package, 

APHO 85 

4/21/2003 by 

NAVFAC EFD

Southwest 

and 

NFA 

Determination 

for 

APHO’s (site

visit by DTSC 

on 

6/13/2003) 

DTSC 6/25/2003 

RWQCB 8/14/2003 

Identified on a 1946 trench or drainage chlocated in this area. Tlocated near several contamination source19, IRP Site 25-Agua TAA 371A (SWMU 10(SWMU 242), and a sJP-5 pipeline (MSC Jthis trench or drainage sampling conducted foare considered represAPHO 85 and all siteachieved a no furthestatus. No further ac

Notes: Sites noted with a SWMU/AOC designation were originally identified during the RFA, although these designations may not have been appropria

listed are previously-identified LOCs and the following apply to each site: 

 No further action is required as per Regulatory Agency Concurrence Letter (date listed) based on Closure Report (date listed).

 The allowable use is residential as long as the applicable notifications and restrictions outlined in FOST #1 are adhered to. 

 No engineering controls, institutional controls, or restrictions are required for any of the LOCs. 

 Operation and Maintenance requirements are not applicable. 
LEGAL_US_W # 74606800.1 

Public outreach activities were effected through the public comment period for the FOST (April 28 to May 28, 2003 and May 3 to June 17, 2004) and Res

meetings. Pertinent information can be found at http://www.efdsw.navfac.navy.mil/environmental/envhome.htm. Source: Earth Tech, Final Environmental Baseline Survey, Former Marine Corps Air Station, El Toro, California (Sept. 2003) 
LEGAL_US_W # 74606800.1 

FOST #2: Locations of Concern
LEGAL_US_W # 74606800.1 

FOST #2 

Locations of Concern 

LOC ID 

Building Number/ 

Location Description 

Closure Report 

Title/Date 

NFA Letter 

Agency/Date Notes 

Transfer Parcel II-T 

RFA 204 (also 

known as Vehicle 

Wash Rack 204) 

761 Vehicle Wash Rack Final Site 

Assessment Report, 

SWMU 204 

9/23/2002 

DTSC 8/22/2000 

RWQCB 

12/18/2002 

Inactive wash rack. OWis associated with this wrack. Final RFA Report recommended repair of wash rack surface basesampling visit (JEG 199samples were collected wash rack and adjacent sites, UST 761 B and O761A, in 2002. Regulatoconcurrence with NFA recommendation obtainfurther action required. 
LEGAL_US_W # 74606800.1 

FOST #2 

Locations of Concern 

LOC ID 

Building Number/ 

Location Description 

Closure Report 

Title/Date 

NFA Letter 

Agency/Date Notes 

TAA761 761 < 90-Day 

Accumulation Point 

Summary Report, 

Former TAA 761, 

SWMU 236 9/20/2002 

by 

NAVFAC EFD 

Southwest 

DTSC 3/10/2003 SWMU/AOC 236. Inves

association with IRP Sitfurther action required. 

Transfer Parcel III-C 

RFA 268 (also known 

as Vehicle Wash Rack 

268) 

240 Vehicle Wash Rack Final RCRA Facility 

Assessment (RFA) 

Report 7/1993 by 

Jacobs Engineering 

Group 

and 

Final Addendum to 

RFA Report 5/1996 By: 

Bechtel National 

DTSC 7/23/1996 Inactive vehicle wash ra

was identified in the RFhas been investigated. status identified in Final Report (JEG 1993) and regulatory concurrence obtained. No further actrequired. 

TAA 240 240 < 90-Day 

Accumulation Point 

Closure Report, TAA 

240 

6/23/2003 

DTSC 12/30/2003 SWMU/AOC 64. Closur

prepared 23 June 2003 recommending NFA; reconcurrence obtained. Nfurther action required. 

Notes: All sites listed are previously identified LOCs. Sources: Earth Tech, Final Environmental Baseline Survey, Former Marine Corps Air Station, El Toro, California (Sept. 2003); United States Marine Corp 

Naval Facilities Enfineering Command (SWDIV), Final Finding of Suitability to Lease, for Carve-outs within Parcela I,II and III, Former Marine Corps Air S

2004). 
LEGAL_US_W # 74606800.1 

FOST #4: Locations of Concern
LEGAL_US_W # 74606800.1 

FOST #4 

Locations of Concern 

LOC ID 

Building Number/ 

Location Description 

Closure Report 

Title/Date 

NFI Letter 

Agency/Date Notes 

Carve-Out l-B 

RFA 164 Demolished Vehicle Wash Rack 

651 

Final RCRA Facility 

Assessment (RFA) 

Report 7/1993 

and 

Final Addendum to 

RFA Report 5/1996 

DTSC 7/23/1996 Inactive vehicle wash rack. Site was 

been investigated. DTSC concurred a letter dated 7/23/1996. No further 

TAA 651A Demolished < 90-Day 

Accumulation Point 

Summary Report for 

Former TAA 651A 

10/15/2001 & 

Information Package 

on 1/7/2003 & 

10/8/2003 

DTSC 10/15/2003 TAA 651A was a metal storage she

of the Station on the loading dock oresults below residential PRGs. DTSrecommendation in a letter dated 10required 

TAA 651B Demolished < 90-Day 

Accumulation Point 

Summary Report for 

Former TAA 651B 

10/15/2001 & 

Information 

Package on 

6/7/2006 

DTSC 6/22/2006 Former accumulation area on aspha

Building 651. TAA 651B is located nStation. Sampling results below resconcurred with NFA recommendatioNo further action required 

SRU-1 439 Medical and Dental 

Facility 439 

Draft Summary 

Report for Group IV 

PRLs March 2008 

EPA 4/17/2008 

DTSC 8/21/2008 

SRU 1 was further investigated as Pin Draft Summary Report for Group concurrence obtained, NFI Status id8/21//2008. 
LEGAL_US_W # 74606800.1 

FOST #4 

Locations of Concern 

LOC ID 

Building Number/ 

Location Description 

Closure Report 

Title/Date 

NFI Letter 

Agency/Date Notes 

SRU-2 Demolished Silver Recovery 

Unit 

Technical 

Memorandum SRU 

2, September 9, 

2002, Final EBS, 

Sept. 2003, and 

Information Package 

Technical 

Memorandum for 

SRU 2, 2/11/2004 

DTSC 3/23/2004 SRU 2 associated with photograph 

Building 443. Historical record searcsampling was conducted from 2002 evaluated as PRL 443. NFI Status i3/23/2004 

RAD Unknown Suspected Former 

Radium Plaque 

Adaptometer 

Building was 

identified on a 1944 

drawing as being 

situated on “C” 

Street, approximately 

two 

blocks north of the 

Trabuco Road 

Station Gate. 

Final Radioiogical 

Release Report 

RAD ADAPT Bldg. 

June 2006 

CDHS 6/19/2006 

EPA 9/12/2005 

Building may have been part of a dibeen used for testing the night visioradioactive equipment that would hafacility was a metal disc coated with encapsulated in transparent plastic. discontinued in 1951. Building may because there was no building numno construction drawings, and no evfoundation, disturbed soil, etc.). Althdetermined whether the building waMCAS El Toro, the 2000 HRA recominvestigation for the area associated suspected building. During the year conducted. The HRA recommended investigation for the Suspected FormAdaptometer Building prior to final dsurvey was completed in 2001 and a Final Radiological Release Reporagreed with the findings of the repounrestricted release on 6/19/2006. 

Carve-Out I-E 

TAA 2 Demolished < 90-Day 

Accumulation 

Point/Hazardous 

Materials Storage 

Closure Report For 

Temporary 

Accumulation Area 

Site 2, Former 

Marine Corps Air 

Station, El Toro, 

Irvine, California 

7/2006. 

DTSC 9/6/2006 Former TAA Site 2 consisted of two 

approximately 150 feet long by 100 southwest of Building 2; Unit 2 was by 100 feet wide and was located ninspections were conducted and soeight locations at Former TAA Site 2 report with a screening risk evaluatiDTSC concurred with NFA. No furth

Carve-Out l-G 
LEGAL_US_W # 74606800.1 

FOST #4 

Locations of Concern 

LOC ID 

Building Number/ 

Location Description 

Closure Report 

Title/Date 

NFI Letter 

Agency/Date Notes 

TAA 7 7 < 90-Day 

Accumulation Point 

Summary Report for 

Former TAA 7 

11/30/2005 

DTSC 3/16/2006 Former TAA 7 was located northeas

of the aircraft parking apron. The sitwide by 20 feet long, and paint storalocated on the site. Soil samples wevisual inspections were conducted aand during 2005. A Summary Repoevaluation was submitted in 2005. Dfurther action in their letter dated 3/required. 

TAA7B 7 < 90-Day 

Accumulation Point 

Summary Report, 

TAA 7B 

7/17/2002 

DTSC 3/4/2003 TAA 7B was located approximately 

Building 7. Drums were stored at th1992 through 1996. Historical recorinspections were conducted, and thSummary Report dated 2002. No fu

Carve-Out l-H 

TAA 51 Demolished < 90-Day 

Accumulation Point 

Closure Report 

Framer TAA 51 

July 2006 

DTSC 8/14/2006 SWMU/AOC 33. Former TAA 51 is 

Building 51. Soil sampling was perfowith a screening risk evaluation was concurred with no further action stadated 8/14/2006. No further action r

Carve-Out I-l 

SRU 3A Demolished Reproduction Office Draft Summary 

Report for Group IV 

PRLs March 2008 

EPA 4/17/2008 

DTSC 8/21/2008 

SRU 3A was further investigated anstatus identified in Draft Summary REPA concurrence obtained for NFI. letter dated 8/21/2008. 

Carve-Out l-J 

TAA 22 Demolished < 90-Day 

Accumulation Point 

Closure Report, 

Former Temporary 

Accumulation Area 

22 

11/4/2003. 

DTSC 7/31/2006 Former TAA 22 included two units, 

sump, and canopy; each unit was a15 feet wide. TAA 22 was located einspection was conducted, soil samborings during 2003, and a closure evaluation was completed. DTSC pand a response to comments was cconcurred with no further action in tNo further action required. 
LEGAL_US_W # 74606800.1 

FOST #4 

Locations of Concern 

LOC ID 

Building Number/ 

Location Description 

Closure Report 

Title/Date 

NFI Letter 

Agency/Date Notes 

Carve-Out ll-G 

APHO 118 Demolished Disturbed Ground 

Perimeter Road 

Supplementary 

Information 

Package for APHO 

118 10/19/2006 

DTSC 3/25/2007 

RWQCB 1/16/2007 

Identified on a 1979 photograph. A (200 by 250 feet) was noted in this located near Anomaly Area 5, contaand 68. Four of these anomalies are After investigation of Anomaly Area declaration was granted in February the northeastern end of the investigPerimeter Road Landfill. Due to the Site 5, further evaluation of this APHthe development of a remedial proginspections and exploratory trenchin118. Based on this investigations, Ron 1/16/2007 and DTSC concurred 

Carve-Out ll-I 

RFA 213 764 Vehicle Wash Rack Data Summary 

Report, Solid Waste 

Management Unit 

213 12/13/2002 and 

Supplementary 

Information 

Package, Solid 

Waste Management 

Unit (SWMU) 213, 

Vehicle Wash rack at 

Building 392 

12/27/2002 

RWQCB 2/20/2003 

DTSC 3/3/2003 

RFA 213, an abandoned vehicle wathe southeastern side of Building 39the former OWS 764B, located adiaof the wash rack, were associated wsamples were collected from four shwash rack during the RFA sampling wash rack were repaired during 199were collected from five borings durDTSC comments dated 3/30/2001. and a screening risk evaluation, the concurred with recommendation of action is required. 

TAA 392A 392 < 90-Day 

Accumulation Point 

Closure Report, 

TAA 392A and 392B 

2/27/2001 

DTSC 3/10/2003 TAA 392A was also known as SWM

consisted of a concrete pad with bewas located north of Building 392. Sduring the RFA Sampling Visit in 19were collected during November 19screening risk evaluation were presdated 2001. No further action is req
LEGAL_US_W # 74606800.1 

FOST #4 

Locations of Concern 

LOC ID 

Building Number/ 

Location Description 

Closure Report 

Title/Date 

NFI Letter 

Agency/Date Notes 

TAA 392B 392 < 90-Day 

Accumulation Point 

Closure Report, 

TAA 392A and 392B 

2/27/2001 

DTSC 3/10/2003 TAA 392B was also known as SWM

consisted of a concrete pad with belocated north of Building 392. Soil sthe RFA Sampling Visit in 1992. Adcollected during November 1999 anrisk evaluation were presented in th

No further action is required. 
LEGAL_US_W # 74606800.1 

FOST #5: Locations of Concern
LEGAL_US_W # 74606800.1 

FOST #5 

Locations of Concern 

LOC ID 

Building 

Number/ 

Location Description 

Closure Report 

Title/Date 

NFA Letter 

Agency/Date Notes 

Carve-Out I-F 

TAA 5A 5 < 90-Day 

Accumulation Point 

Summary Report, 

TAA 5A 07/17/2002

by 

IT 

DTSC 03/04/2003 TAA 5A, also known as SWMU/AOC 25, wa

visual site inspection. Light stains were obsesurrounding the TAA. However, during substhrough 2000, no stains or significant cracks signs of a release were noted during the 200of the EBS. NFA was recommended and DTfurther action required. 

TAA 5B 5 < 90-Day 

Accumulation Point 

Closure Report, 

TAA 5B 11/24/2008

by 

BRAC PMO West 

RWQCB 11/24/2008

 DTSC 04/08/2009 

TAA 5B, also known as SWMU/AOC 26, waduring a site visit conducted in support of the sampling identified TPH in the soils at levels removal of contaminated soils was conductereport was distributed on 11/24/2008 recomconcurred with NFA in a letter dated 11/24/2with NFA in a letter dated 04/08/2009. 

APHO 26 Crash Crew Pit 

No. 2 

Disturbed Ground 

and Excavation 

Summary Report, 

APH0 26 

10/30/1999 

by 

NAVFAC SW 

DTSC 01/04/2000 APHO 26, also known as SAIC anomaly 189

photograph dated 08/28/1968. SAIC descrip(EX) with possible liquid (LQ) located at the about 1,200 feet north of Runway 25R and 134L. The purpose of the excavation is unknohistory is recommended.” Historical facility r

inspections were conducted, and the findingSummary Report dated 10/30/1999. No furth

APHO 92 Compass Rose 

No. 1 

Stain Information 

Package, APHOs 

83, 91, and 92 

04/17/2003 

by 

NAVFAC SW 

RWQCB 08/14/2003 

DTSC 04/20/2004 

APHO 92, also known as SAIC anomaly 117photograph dated 06/28/1960 photograph. Spossible stain (ST) around abandoned ComStreet and N 1 st Place. Additional investigaHistorical facility records were reviewed, visconducted, and the findings were presented APHO 83 (SAIC 8), APHO 91 (SAIC 112), aFormer Marine Corps Air Station, El Toro, CDTSC concurred with no further action on 04concurred with no further action on 08/14/20required. 

Carve-Out II-E 
LEGAL_US_W # 74606800.1 

FOST #5 

Locations of Concern 

LOC ID 

Building 

Number/ 

Location Description 

Closure Report 

Title/Date 

NFA Letter 

Agency/Date Notes 

RFA 14 606 Drop Tank Fuel 

Storage Area 

Summary Report, 

Site Verification at 

Former Aircraft 

Drop Tank Fuel 

Storage Area near 

Building 606, 

SWMU Number 14 

11/09/1999 

by 

NAVFAC SW 

RWQCB 03/31/2000 RWQCB concurred with NFA in a letter date

action required. 

RFA 43 139 Drum Storage Area Closure Report, 

Solid Waste 

Management Unit 

43 05/09/2006 

by 

CDM Federal 

Programs Corp. 

DTSC 06/05/2006 Site also identified as SWMU 43. RFA site 4

Building 139, and received site closure conc

RFA 150 605 (on tarmac) Aircraft Wash Area Final RCRA Facility 

Assessment (RFA) 

Report July 1993 by 

Jacobs Engineering 

Group 

and 

Final Addendum to 

RFA Report 

May 1996 by 

Bechtel National 

DTSC 07/23/1996 Aircraft wash area situated on tarmac. Site i

associated with this wash rack. NFA status i(JEG 1993) and DTSC concurred with NFA dated 07/23/1996. No further action required
LEGAL_US_W # 74606800.1 

FOST #5 

Locations of Concern 

LOC ID 

Building 

Number/ 

Location Description 

Closure Report 

Title/Date 

NFA Letter 

Agency/Date Notes 

RFA 152 606 (on tarmac) Aircraft Wash Area Final RCRA Facility 

Assessment (RFA) 

Report July 1993 by 

Jacobs Engineering 

Group 

and 

Final Addendum to 

RFA Report 5/1996 

by Bechtel National 

DTSC 07/23/1996 Aircraft wash area on the tarmac outside of 

Hangar). Site is inactive. NFA status identifie1993) and DTSC concurred with NFA recom07/23/1996. No further action required. 

RFA 267 605 Drop Tank Fuel 

Storage Area 

Final RCRA Facility 

Assessment (RFA) 

Report July 1993 by 

Jacobs Engineering 

Group 

and 

Final Addendum to 

RFA Report 

May 1996 by 

Bechtel National 

DTSC 07/23/1996 NFA status identified in Final RFA Report (J

concurrence obtained. No further action req

TAA 115 115/914 < 90-Day 

Accumulation Point 

Closure Report, 

Former Temporary 

Accumulation Area 

Site 115 07/20/2006 

by 

Brown and Caldwell 

DTSC 12/28/2006 Site also identified as SWMU/AOC 39. Sam

PRGs. No visible signs of release noted dur

support of the EBS. NFA recommended basand the 2002 VSI. DTSC concurrend with Nrequired. 

TAA 605 605/912 < 90-Day 

Accumulation Point 

Closure Report, 

TAA 605 

by 

Shaw 

Environmental Inc. 

DTSC 09/13/2004 SWMU/AOC 149. Sampling results below re

recommended and DTSC concurred with NF
LEGAL_US_W # 74606800.1 

FOST #5 

Locations of Concern 

LOC ID 

Building 

Number/ 

Location Description 

Closure Report 

Title/Date 

NFA Letter 

Agency/Date Notes 

TAA 606 606/913 < 90-Day 

Accumulation Point 

Closure Report, 

TAA 605 

by 

Shaw 

Environmental Inc. 

DTSC 09/16/2004 Site also identified as SWMU/AOC 255. Sam

residential PRGs. NFA was recommended aNFA. No further action required. 

APHO 99 139 Soil Stains Information 

Package, APHO 87, 

90, 98, 99, 100, and 

109 05/2003 

by 

NAVFAC SW 

RWQCB 08/14/2003 Identified on a 1967 photograph. The anoma

parallel lines on the westerly side of Facility works shop located east of former Tank Faris within the former tank farm boundaries. Aand the site was closed in 1996. Based on tall sites within the former tank farm are closerecommended for APHO 99. Based on a VSRWQCB concurred with no further action in 

APHO 110 121 Liquid Information 

Package, APHO 

110 04/28/2003 

by 

NAVFAC SW 

RWQCB 08/14/2003 Identified on a 1974 photograph. The facility 

a fire station and the liquid flowing from the in routine operations at the fire station. BaseJune 2003, RWQCB concurred with no furth08/14/2003 

APHO 119 Edge of Aircraft 

Apron between 

605 and 606 

Stains Information 

Package, APHO 

119 04/22/2003 by 

NAVFAC SW 

and 

NFA Determination 

for APHOs (site visit 

by DTSC on 

06/13/2003) 

DTSC 06/25/2003 

RWQCB 08/14/2003 

Identified on a 1983 photograph. The APHO in April 2003. No evidence of staining was fodrain was noted in that location. Two TAAs (TAA 606 [SWMU 255]) are between Facility obtained for these TAAs (see above). Based 

conducted in June 2003, DTSC and RWQCrecommendation of NFA for APHO 119. No 

PCB 643 643 3 oil-filled cutouts Final EBS 

(09/12/2003) 

By Earth Tech 

DTSC 09/25/2003 

USEPA 

09/25/2003 

3 oil-filled cutouts with less than 1 ppm PCB portion of the building. 
LEGAL_US_W # 74606800.1 

FOST #5 

Locations of Concern 

LOC ID 

Building 

Number/ 

Location Description 

Closure Report 

Title/Date 

NFA Letter 

Agency/Date Notes 

PCB 892 892 3 oil-filled cutouts Final EBS 

(09/12/2003) 

By Earth Tech 

DTSC 09/25/2003 

USEPA 

09/25/2003 

3 oil-filled cutouts with less than 0.005 ppm during 2003 inspection. 

Carve-Out II-M 

RFA 178 673 Vehicle Wash Rack Final RCRA Facility 

Assessment (RFA) 

Report July 1993 by 

Jacobs Engineering 

Group 

and 

Final Addendum to 

RFA Report 

May 1996 by 

Bechtel National 

DTSC 07/23/1996 Inactive vehicle wash rack. OWS 673A is as

NFA status identified in Final RFA Report (Jconcurred in a letter dated 07/23/1996. No f

RFA 181 673 Land/Farming Area Final RCRA Facility 

Assessment (RFA) 

Report July 1993 by 

Jacobs Engineering 

Group 

and 

Final Addendum to 

RFA Report 

May 1996 by 

Bechtel National 

DTSC 07/23/1996 NFA status identified in Final RFA Report (J

concurrence obtained. No further action req

RFA 185 673 Drum Storage Area Information 

Package, Solid 

Waste Management 

Unit 185 

12/07/2005 

by 

Navy BRAC PMO 

West 

DTSC 07/31/2006 RFA site 185 was associated with Building 6

concurrence in 2006. 
LEGAL_US_W # 74606800.1 

FOST #5 

Locations of Concern 

LOC ID 

Building 

Number/ 

Location Description 

Closure Report 

Title/Date 

NFA Letter 

Agency/Date Notes 

RFA 264 DRMO Yard 

No. 3 

DRMO Yard No. 3 Final RCRA Facility 

Assessment (RFA) 

Report July 1993 by 

Jacobs Engineering

Group 

and 

Final Addendum to 

RFA Report 

May 1996 by 

Bechtel National 

DTSC 07/23/1996 NFA status identified in Final RFA Report (J

concurrence obtained. No further action req

TAA 673 673 < 90-Day 

Accumulation Point 

Closure Report, 

Former Temporary 

Accumulation Area 

673 05/21/2003 

by 

Shaw 

Environmental 

DTSC 09/24/2004 Site also identified as SWMU/AOC 186. DTS

letter dated 09/24/2004. No further action re

TAA 772 772 < 90-Day 

Accumulation Point 

Closure Report, 

TAA 772 

06/26/2003 

by 

OHM 

DTSC 11/07/2003 Site also identified as SWMU/AOC 225. Soi

contaminants between residential and indusrisk screening, soil management recommenNFA in a letter dated 11/07/2003. No further 

APHO 20 DRMO Yard 

No. 3 

Disturbed Ground 

and Excavation 

Summary Report, 

APHO 20 & APHO 

21 11/30/1999 

by 

NAVFAC SW 

DTSC 03/03/2000 Regulatory agency concurrence of NFA reco

obtained. No further action required. 
LEGAL_US_W # 74606800.1 

FOST #5 

Locations of Concern 

LOC ID 

Building 

Number/ 

Location Description 

Closure Report 

Title/Date 

NFA Letter 

Agency/Date Notes 

APHO 27 DRMO Yard 

No. 3 

Stains and Wet Soil Summary Report, 

APHOs 23, 27, 58 

(Area 2) 03/07/2000 

by 

NAVFAC SW 

RWQCB 10/18/2000 No evidence of staining or a release identifie

in support of the EBS. Sampling results beloRegulatory agency concurrence of NFA recoobtained. No further action required. 

APHO 38 1789 Disturbed Ground 

and Excavation 

Summary Report, 

APHO 38 

12/19/2003 by 

Shaw 

Environmental 

and 

Radiological 

Release Report, 

IRP Site 1, DRMO 

Yard 3, NBC, 

APHO 38, Paved 

Area south of 

Building 295 

04/12/2007 by 

Weston Solutions 

DTSC 04/06/2005 

CDPH 08/20/2007 

APHO 38 was associated with Building 1789concurrence from DTSC in 2005 pertaining tconstituents. Radiological investigations were conducted presented in a radiological release report ((Wresults of these investigations, CDPH concufor unrestricted release of APHO 38 in a lettfurther action required. 

APHO 46 Golf Course – 

Hole No. 5; 

overlaps IRP 

Site 5 

Disturbed Ground 

and Excavation 

Summary Report, 

APHO 46 

January 2005 by 

Earth Tech 

and 

Radiological 

Release Report, 

IRP Sites 3 and 5 

(including APHO 

46), AA 3, and 

Building 244 

December 2006 by 

Weston Solutions 

DTSC 05/17/2004 

U.S. EPA 

03/08/2004 

RWQCB 05/01/2003 

CDPH 05/19/2006 

The extent of the anomaly has been investiggeophysical survey, which identified only a rdebris. Surface debris was also observed dusupport of the EBS. Characterization of debwas conducted as part of the pre-design invBased on the results of the investigations, NSummary Report. DTSC concurred with no fto non-radiological constituents in a letter daRadiological investigations at APHO 46 werwith IRP Site 5 and results presented in a ra(Weston 2006). Based on the results of thesconcurred with the recommendation for unrein a letter dated 05/19/2006. No further actio
LEGAL_US_W # 74606800.1 

FOST #5 

Locations of Concern 

LOC ID 

Building 

Number/ 

Location Description 

Closure Report 

Title/Date 

NFA Letter 

Agency/Date Notes 

RAD 

DRMO 

DRMO Yard 3 

(RFA 264) 

Outside storage area used by DRMO to store scrap and excess materials and equipment awaiting disposition. Area had been in operation since the 1950s. 

Radiological 

Release Report, 

IRP Site 1, DRMO 

Yard 3, NBC, 

APHO 38, Paved 

Area south of 

Building 295 

04/12/2007 

by 

Weston Solutions 

DTSC 07/23/1996 

CDPH 08/20/2007 

The yard was restricted from receiving and/ocomponents containing radioactive material

records or direct knowledge of radiological mEl Toro DRMO. However, during an employthat, “Marines could have stored small quanand gauges at the storage yard, since it is a releases were identified at this site. Site has no further action. Concurrence on the no furobtained from DTSC in a letter dated 07/23/stationwide Historical Radiological AssessmThe HRA recommended further radiological Yard 3 prior to final disposition. A radiologica2001 and the results were presented in a ra(Weston 2007). CDPH concurred with recomrelease in a letter dated 08/20/2007. 

RAD NBC NBC Area 

(Buildings 787, 

1789, and 1803 

and surface 

impoundments 

[APHO-38]) 

Buildings and surface impoundments are situated north of the intersection of East Marine Way and El Toro Boulevard. Buildings supported training of personnel for readiness for nuclear, biological, and/or chemical weapons attack. 

Radiological 

Release Report, 

IRP Site 1, DRMO 

Yard No. 3, NBC, 

APHO 38, Paved 

Area south of 

Building 295 

04/12/2007 

by 

Weston Solutions 

CDPH 08/20/2007 Building 1789 contained a 4 foot by 6 foot co

storing non-licensed, radioactive sources. BNBC training facilities. These buildings were 

training/instruction areas, and training group known whether impoundments at the site wetraining operations. During the year 2000, a conducted. The HRA recommended further 

the NBC Area prior to final disposition. A radcompleted in 2001. CDPH concurred with reunrestricted release in a letter dated 08/20/2

Carve-Out II-R 

SRU 3C 457 Dental Clinic Summary Report 

for Group IV PRLs 

by Earth Tech 

(March 2008) 

DTSC 08/21/2008 

U.S. EPA 

4/17/2008 

Site identified as a former SRU at a photogrdental clinic (SRU 3C). Site was recommendfor potential discharges of contaminants to tsystem. SRU 3C was investigated as part of The investigations included records review, Based on the results of these investigationswas recommended in Summary Report for Gconcurrence was obtained. 

Source: Earth Tech, Final Environmental Baseline Survey, Former Marine Corps Air Station, El Toro, California (Sept. 2003).
LEGAL_US_W # 74606800.1 

FOST #6: Locations of Concern 
LEGAL_US_W # 74606800.1 

FOST #6 

Locations of Concern 

LOC ID 

Building 

Number/ 

Location 

Description Closure Report Title/Date NFA Letter Agency/Date Notes 

Carve-Out ll-B 

RFA 293 130 Cleaning Tank Final RCRA Facility 

Assessment (RFA) 

Report 07/1993 by 

JEG 

and 

Final Addendum to 

RFA Report 5/1996 

by BNI 

DTSC 

07/23/1996 

NFA status identified in 1993 Final RFA Repconcurrence obtained. No further action requ

TAA 130A 130 < 90-Day 

Accumulation Point 

Closure Report, 

Former TAA 130A 

and TAA 130B 

January 2004 

by 

Shaw 

DTSC 

12/10//2004 

SWMU/AOC 294. Sampling conducted in 20letter dated 12/10/2004. No further action req

TAA 130B 130 < 90-Day 

Accumulation Point 

Closure Report, 

Former TAA 130A 

and TAA 130B 

January 2004 

by 

Shaw 

DTSC 

12/10/2004 

SWMU/AOC 295. Sampling conducted in 20letter dated 12/10/2004. No further action req

TAA 634 634 < 90-Day 

Accumulation Point 

Closure Report 

March 2007 

by 

CDM 

DTSC 

06/08/2007 

Sampling conducted in 2006. Closure report 

2007. Site was closed by DTSC in a letter daaction required. 
LEGAL_US_W # 74606800.1 

FOST #6 

Locations of Concern 

LOC ID 

Building 

Number/ 

Location 

Description Closure Report Title/Date NFA Letter Agency/Date Notes 

APHO 90 Q Street and 

9th Street 

Unidentified Object Information 

Package, APHOs 

87, 90, 98, 99, 100, 

and 109 5/2003 by 

NAVFAC EFD 

Southwest 

and 

NFA Determination 

for APHO’s (site 

visit by DTSC on 

6/13/2003) 

DTSC 6/25/2003 

RWQCB 8/14/2003 

Identified on a 1960 photograph. Object was incinerator or chimney. Adjacent structures in paint shop that has a mezzanine section that chimney and a former incinerator was locateAPHO. The APHO could be the incinerator lo

This possibility, and the lack of other evidencbasis for no further action. No further action 

APHO 109 129/130 Drum Storage Information 

Package, APHOs 

87, 99, 98, 99, 100, 

and 109 5/2003 by 

NAVFAC SW 

and 

NFA Determination 

for APHOs (site 

visit by DTSC on 

06/13/2003) 

DTSC 

06/25/2003 

RWQCB 

08/14/2003 

APHO 109 (also known as SAIC 284) was idwith probable drums on an aerial photograph located near Building 129, Building 130, and study area included the investigation area fo130C, UST 130A, UST 130B, PRL 130, and visual inspection conducted in June 2003, DT

with recommendation of NFA. No further act

SRU3B 133 Photography 

Laboratory 

Summary Report 

for Group IV PRLs

March 2008 

by 

Earth Tech 

DTSC 

08/21/2008 

Site identified as a former Silver Recovery Ulaboratory. Site was evaluated as part of PRsamples were collected during 2003. DTSC cPRL 133 in a letter dated 08/21/2008. No fur
LEGAL_US_W # 74606800.1 

FOST #6 

Locations of Concern 

LOC ID 

Building 

Number/ 

Location 

Description Closure Report Title/Date NFA Letter Agency/Date Notes 

Carve-Out ll-K 

TAA 371A 371 < 90-Day 

Accumulation Point 

Addendum to 

Summary Report 

for TAA 371A 

November 2003 

by 

Shaw 

DTSC 

12/16/2003 

SWMU/AOC 107. Soil samples were collecteconcurred with no further action. 

TAA 371B 371/915 < 90-Day 

Accumulation Point 

Summary Report 

for TAA 371B 

January 2009 

by 

ECS 

DTSC 

03/11/2009 

SWMU/AOC 242. Soil samples were collecteconcurred with no further action. 
LEGAL_US_W # 74606800.1 

FOST #6 

Locations of Concern 

LOC ID 

Building 

Number/ 

Location 

Description Closure Report Title/Date NFA Letter Agency/Date Notes 

APH0 9 Agua Chinon 

Wash 

Stains and Wet Soil Summary Report, 

APH0 9 

08/31/1999 

by 

NAVFAC SW 

DTSC 

10/06/1999 

RWQCB 

10/06/1999 

U.S. EPA 

11/04/1999 

APHO 9 (also known as SAIC 53) was descrhangar on a 1946 aerial photograph. The site with the location of Former IRP Site 19, Unit also known as MSC ST19A, that was addrescorrective action program. The visual inspec

conducted during 1999. Regulatory agency crecommendation has been obtained from DT10/06/1999 and U.S. EPA on 11/04/1999. No 

Carve-Out II-O 

RFA 120 390 Vehicle Wash 

Rack 

Final RCRA Facility 

Assessment (RFA) 

Report 07/1993 by 

JEG 

and 

Final Addendum to 

RFA Report 

05/1996 by BNI 

DTSC 

07/23/1996 

Former vehicle wash rack. Soil samples were Sampling visit in 1992 and NFA status identiReport. DTSC concurrence obtained in a lettwas demolished and moved during the remoUST 762B and OWS 762A, that were closed 07/2/97. No further action required. 
LEGAL_US_W # 74606800.1 

FOST #6 

Locations of Concern 

LOC ID 

Building 

Number/ 

Location 

Description Closure Report Title/Date NFA Letter Agency/Date Notes 

RFA 262 390 Fuel Storage Area Final RCRA Facility 

Assessment (RFA) 

Report 07/1993 by 

JEG 

and 

Final Addendum to 

RFA Report 

05/1996 by BNI 

DTSC 

07/23/1996 

Soil samples were collected during the RFA NFA status identified in 1993. Final RFA Repconcurrence obtained. No further action requ

TAA 390A 390 < 90-Day 

Accumulation Point 

Closure Report, 

TAA 390A and 

390B 

05/04/1999 

by 

OHM 

DTSC 

06/10/1999 

SWMU/AOC 122. Site closure and regulatory 

recommendation has been obtained by DTSaction required. 

TAA 390B 390 < 90-Day 

Accumulation Point 

Closure Report, 

TAA 390A and 

390B 

05/04/1999 

by 

OHM 

DTSC 

06/10/1999 

SWMU/AOC 261. Site closure and regulatory 

recommendation has been obtained by DTSaction required. 

Carve-Out lll-B-1 
LEGAL_US_W # 74606800.1 

FOST #6 

Locations of Concern 

LOC ID 

Building 

Number/ 

Location 

Description Closure Report Title/Date NFA Letter Agency/Date Notes 

RFA 6 Northwest Bee 

Canyon Wash 

Landfarming Site Final RCRA Facility 

Assessment (RFA) 

Report 7/1993 by 

Jacobs Engineering 

Group 

and 

Final Addendum to 

RFA Report 5/1996 

by BNI 

DTSC 

07/23/1996 

No analytes were detected above action leve

NFA status identified in Final RFA Report (JEconcurrence obtained. No further action requ

RFA 71 295 < 90-Day 

Accumulation Area 

Summary Report, 

Solid Waste 

Management Unit 

(SWMU) 71 

11/4/1999 

By 

IT 

DTSC 

01/27/2000 

Site is situated within the investigation bound(North Pavement Edge). DTSC concurred w1/27/2000. No further action required. 

RFA 216 765 Vehicle Wash Rack Final RCRA Facility 

Assessment (RFA) 

Report 7/1993 by 

JEG and Final 

Addendum to RFA 

Report 5/1996 

by 

BNI 

DTSC 

07/23/1996 

Inactive vehicle wash rack. OWS 765B is asSite was identified in the RFA and has been RWQCB letter from 1989 indicates that the sNFA status identified in Final RFA Report (JEconcurred in a letter dated 7/23/96. No furthe
LEGAL_US_W # 74606800.1 

FOST #6 

Locations of Concern 

LOC ID 

Building 

Number/ 

Location 

Description Closure Report Title/Date NFA Letter Agency/Date Notes 

RFA 274 31 Stockpiled Soil Final RCRA Facility 

Assessment (RFA) 

Report 7/1993 by 

JEG 

and 

Final Addendum to 

RFA Report 5/1996 

by BNI 

DTSC 

7/23/1996 

NFA status identified in Final RFA Report (JEconcurrence obtained. No further action requ

RFA 299 800 Vehicle Wash Rack Final RCRA Facility 

Assessment (RFA) 

Report 7/1993 by 

JEG 

and 

Final Addendum to 

RFA Report 5/1996 

by BNI 

DTSC 

07/23/1996 

Inactive vehicle wash rack. Wash rack was idbeen investigated. Surface of the wash rack defects. NFA status identified in Final RFA Rconcurred in a letter dated 7/23/96. No furthe

TAA 31A 31 < 90-Day 

Accumulation Point 

Addendum Closure 

Report TAA 31A 

01/13/2003 

By 

NAVFAC SW 

DTSC 

07/12/2004 

SWMU/AOC 272. Sampling results below resigns of release noted during 2002 Additiona2002 and DTSC concurred in a letter dated 0action. 

TAA 31B 31 < 90-Day 

Accumulation Point 

Closure Report 

TAA 31B 

03/27/2001 

by 

OHM 

DTSC 

01/31/2005 

Sampling results below residential PRGs. No noted during 2002 VSI conducted in support sampling conducted in November 1999. DTSconcurrence in a letter dated 01/31/2005. 
LEGAL_US_W # 74606800.1 

FOST #6 

Locations of Concern 

LOC ID 

Building 

Number/ 

Location 

Description Closure Report Title/Date NFA Letter Agency/Date Notes 

TAA 671 671 < 90-Day 

Accumulation Point 

Closure Report 

TAA 671 

June 2006 and 

Replacement 

Pages by NAVFAC 

EFD Southwest on 

12/29/2006 

DTSC 

01/03/2007 

SWMU/AOC 172. November 2005 sampling PRGs. NFA recommended. DTSC agreed w01/03/2007. 

TAA 765 765 < 90-Day 

Accumulation Point 

Closure Report, 

TAA 765 

07/21/1998 

by 

OHM 

DTSC 

11/17/1998 

SWMU/AOC 266. Site closure and regulatory 

recommendation has been obtained. No furt

TAA 771 771 < 90-Day 

Accumulation Point 

Closure Report 

TAA 771 

January 2009 

by 

CDM 

DTSC 

03/20/2009 

SWMU/AOC 224. Soil removal and sampling 2007. DTSC agreed with the NFA concurren03/20/2009. 
LEGAL_US_W # 74606800.1 

FOST #6 

Locations of Concern 

LOC ID 

Building 

Number/ 

Location 

Description Closure Report Title/Date NFA Letter Agency/Date Notes 

TAA 800 800 < 90-Day 

Accumulation Point 

Closure Report 

TAA 800 

October 2004 

by 

Shaw 

DTSC 

11/21/2005 

SWMU/AOC 229. Sampling results below rerecommended. DTSC agreed with the NFA c11/21/2005. 

APHO 54 Tank Farm 

No. 1 

Disturbed Ground 

and Excavation 

Summary Report, 

APHO 54, 55, 56, & 

57 (Area 1) 11/19/1999 

by 

NAVFAC SW 

RWQCB 

10/18/2000 

Also known as SAIC 144, Site evaluated as Alocated near Former Tank Farm 1 and Forminspected and soil samples were collected dagency concurrence of NFA recommendatiofurther action required. 

APHO 55 Tank Farm 

No. 1 

Disturbed Ground 

and Excavation 

Summary Report, 

APHO 54, 55, 56, & 

57 (Area 1) 11/19/1999 

by 

NAVFAC SW 

RWQCB 

10/18/2000 

Also known as SAIC 169, Site evaluated as Alocated near Former Tank Farm 1 and Forminspected and soil samples were collected dagency concurrence of NFA recommendatiofurther action required. 
LEGAL_US_W # 74606800.1 

FOST #6 

Locations of Concern 

LOC ID 

Building 

Number/ 

Location 

Description Closure Report Title/Date NFA Letter Agency/Date Notes 

APHO 56 Tank Farm 

No. 1 

Disturbed Ground 

and Excavation 

Summary Report, 

APHO 54, 55, 56, & 

57 (Area 1) 11/19/1999 

by 

NAVFAC SW

RWQCB 

10/18/2000 

Also known as EPA 7, Site evaluated as Anolocated near Former Tank Farm 1 and Forminspected and soil samples were collected dagency concurrence of NFA recommendatiofurther action required. 

APHO 57 Tank Farm 

No. 1 

Disturbed Ground 

and Excavation 

Summary Report, 

APHO 54, 55, 56, & 

57 (Area 1) 11/19/1999 

by 

NAVFAC SW 

RWQCB 

10/18/2000 

Also known as EPA 36, Site evaluated as Anlocated near Former Tank Farm 1 and Forminspected and soil samples were collected dagency concurrence of NFA recommendatiofurther action required. 

APHO 84 Perimeter 

Road 

Unidentified Object Information 

Package, APHO 84 

and APHO 88 

9/30/2003 

by 

NAVFAC SW 

RWQCB 

11/24/2003 

DTSC 

09/24/2004 

Also known as SAIC 35, identified on a 1952 

anomaly is in the vicinity of APHO 84. Both sto maintenance activities of the roadway or achannels or trenches were noted during a vis2003. RWQCB concurred with NFA in a letteconcurred with NFA in a letter dated 09/24/2

APHO 88 Perimeter 

Road 

Trench Information 

Package, APHO 84 

and APHO 88 

9/30/2003 

by 

NAVFAC SW 

RWQCB 

11/24/2003 

DTSC 

09/24/2004 

Also known as SAIC 68, identified on a 1946 

object or mound was noted on the north side 800 feet northwest of Bee Canyon. This mou(a shallow trench). Both sites could have beeactivities of the roadway or adjacent culvertswells for IRP Sites 18 and 24 are located neathe Operable Unit 1 groundwater plume. This in 2003 and no evidence of a mound or otheconcurred with NFA in a letter dated 11/24/2NFA in a letter dated 09/24/2004. 
LEGAL_US_W # 74606800.1 

FOST #6 

Locations of Concern 

LOC ID 

Building 

Number/ 

Location 

Description Closure Report Title/Date NFA Letter Agency/Date Notes 

APHO 96 358 Unidentified Object, 

Stains, Wet Soil, 

Excavation 

Information 

Package, APHO 96 

4/19/2003 

by 

NAVFAC SW 

RWQCB 

08/14/2003 

DTSC 

10/22/2004 

Also known as SAIC 133, identified on a 196located near a potable water pumping station maintenance activities at the pumping station Based on the former use of the area and the activities in the area, a declaration of no furthRWQCB concurred with NFA in a letter dated with NFA in a letter dated 10/22/2004. 

APHO 107 West of 

Former Sludge 

Drying Beds 

Excavation and Fill 

Area 

Information 

Package, APHO 

107 10/09/2003 

by 

NAVFAC SW 

RWQCB 

12/01/2003 

DTSC 

10/12/2004 

Also known as SAIC 246, identified on a 197noted in the photograph is located near the B25), near a former transformer storage area Site 12 (Sludge Drying Beds). RWQCB concdated 12/1/2003; however, DTSC concurred 10/12/2004. 

APHO 112 672 Drum Storage Information 

Package, APHOs 

112 and 114 

06/16/2003 

by 

NAVFAC SW 

DTSC 

06/25/2003 

Also known as SAIC 305, identified on a 197drums in open storage area. The location of boundaries of IRP Site 24 (VOC Source Areaareas (TAA 671 [SWMU 172] and TAA 672 [672 and are under investigation as part of thVSI conducted in June 2003, DTSC concurreNFA. No further action is required. 

APHO 114 Drop Tank 

Drainage Area 

No. 2 

Drum Storage Information 

Package, APHOs 

112 and 114 

6/16/2003 by 

NAVFAC SW 

and 

NFA Determination 

for APHOs (site 

visit by DTSC on 

6/13/2003) 

DTSC 

06/25/2003 

Also known as SAIC 348, identified on a 197

drums in open storage area. This site within (Drop Tank Drainage Area Number 2) and IRArea). Soil sampling was conducted for IRP Action declaration was granted for IRP Site 7 conducted in June 2003, DTSC concurred wfurther action is required. 
LEGAL_US_W # 74606800.1 

FOST #6 

Locations of Concern 

LOC ID 

Building 

Number/ 

Location 

Description Closure Report Title/Date NFA Letter Agency/Date Notes 

RAD 242 242 Command Air 

Museum Building. 

Historic aircraft 

equipped with 

radium painted 

instruments and 

other components 

containing various 

radioisotopes were 

displayed within 

this building. 

Final Radiological 

Release Report, 

Buildings 242, 243, 

295, 319, 360, 787, 

832, and 1789 

March 2008 

by 

Weston Solutions 

Inc. 

CDHS 

05/10/2007 

Aircraft contained or were suspected of contapossibly other radio luminescent and heat reStrontium-90, Krypton-85, and Thorium-232. equipment have been removed. During the ywas conducted. The HRA recommended furtfor Building 242 prior to final disposition. A cosurvey was completed in 2001 and 2004. Ththe Final Radiological Release Report dated approved unrestricted release of Building 2405/10/2007. 

RAD 243 243 Command Air 

Museum Building. 

Historic aircraft 

equipped with 

radium painted 

instruments and 

other components 

containing various 

radioisotopes were 

displayed within 

this building. 

Final Radiological 

Release Report, 

Buildings 242, 243, 

295, 319, 360, 787, 

832, and 1789 

March 2008 

by 

Weston Solutions 

Inc. 

CDHS 

04/19/2007 

Aircraft contained or were suspected of contapossibly other radio luminescent and heat reStrontium-90, Krypton-85, and Thorium-232. radium, including radioactive dials, meters, ain showcases in Building 243 and were confiequipment. The aircraft and associated equipDuring the year 2000, a stationwide HRA warecommended further radiological investigatifinal disposition. A confirmation radiological s2001 and 2004. The results were presented Release Report dated March 2008. CDHS aof Building 243 in a letter dated 04/19/2007. 

RAD 244 244 Command Air 

Museum Building. 

Historic aircraft 

equipped with 

radium painted 

instruments and 

other components 

containing various 

radioisotopes were 

displayed within 

this building. The 

adjacent area was 

used as a DRMO 

storage yard. 

Final Radiological 

Release Report, 

Buildings 242, 243, 

295, 319, 360, 787, 

832, and 1789 

March 2008 

by 

Weston Solutions 

Inc. 

DTSC 

02/14/2007 

Aircraft contained or were suspected of contapossibly other radio luminescent and heat reStrontium-90, Krypton-85, and Thorium-232. equipment have been removed. During the ywas conducted. The HRA recommended furtfor Building 244 prior to final disposition. A cosurvey was completed in 2001 and 2004. Ththe Final Radiological Release Report dated approved unrestricted release of Building 2402/14/2007. 
LEGAL_US_W # 74606800.1 

FOST #6 

Locations of Concern 

LOC ID 

Building 

Number/ 

Location 

Description Closure Report Title/Date NFA Letter Agency/Date Notes 

RAD 295 295 Building identified 

as a former 

maintenance 

hangar where 

aircraft utilizing 

radioactive 

equipment was 

previously situated. 

Final Radiological 

Release Report, 

Buildings 242, 243, 

295, 319, 360, 787, 

832, and 1789 

March 2008 

by 

Weston Solutions 

Inc. 

CDHS 

06/05/2007 

All radioactive components were removed froDuring the year 2000, a stationwide HRA warecommended further radiological investigatifinal disposition. A confirmation radiological s2001 and 2004. The results were presented Release Report dated March 2008. CDHS aof Building 295 in a letter dated 06/05/2007. 

Carve Out lll-B-2 

RFA 94 320 < 90-Day 

Accumulation Point 

Summary Report, 

SWMU 94 

09/02/1999 

by 

NAVFAC SW 

DTSC 

10/07/1999 

Site is situated within the investigation boundconcurred with NFA in a letter dated 10/7/19required. 
LEGAL_US_W # 74606800.1 

FOST #6 

Locations of Concern 

LOC ID 

Building 

Number/ 

Location 

Description Closure Report Title/Date NFA Letter Agency/Date Notes 

RFA 253 317 Vehicle Wash Rack Final RCRA Facility 

Assessment (RFA) 

Report July 1993 

by JEG 

and 

Final Addendum to 

RFA Report 

May 1996 by BNI 

DTSC 

07/23/1996 

Inactive vehicle wash rack. NFA status ident

(JEG, 1993) and regulatory concurrence obtaJuly 1993 Final RFA Report. No further actio

Carve Out lll-E 

RAD 319 319 Building was used 

for several years 

for inside storage 

of DRMO materials 

(government 

property) and 

equipment while 

awaiting 

disposition. 

Final Radiological 

Release Report, 

Buildings 242, 243, 

295, 319, 360, 787, 

832, and 1789 

March 2008 

by 

Weston Solutions 

Inc. 

CDHS 

10/23/2006 

Building was restricted from receiving and/or components containing radioactive materialsknowledge of radiological materials are availmaterials being handled by the El Toro DRMof general radioactive materials may have beyear 2000, a stationwide HRA was conductefurther radiological investigation for Building confirmation radiological survey was compleresults were presented in the Final RadiologMarch 2008. CDHS approved unrestricted reletter dated 10/23/2006. 

Carve Out lll-F 

APHO 111 360 Wet Soil Information 

Package, APHO 

111 4/21/03 

by 

NAVFAC SW 

RWQCB 8/14/2003 

DTSC 

10/01/2004 

Identified on a 1975 photograph. The area nwithin the boundaries of IRP Site 24 and adja(Old Salvage Yard). Due to the location of thboundaries of IRP Site 24 and adjacent to IRaction was recommended for this APHO as aactions taking place for VOC releases at IRP APHO. RWQCB concurred with the recommDTSC concurred with NFA on 10/01/2004. 
LEGAL_US_W # 74606800.1 

FOST #6 

Locations of Concern 

LOC ID 

Building 

Number/ 

Location 

Description Closure Report Title/Date NFA Letter Agency/Date Notes 

RAD 360 360 Building was used 

for several years 

for inside storage 

of DRMO materials 

(government 

property) and 

equipment while 

awaiting 

disposition. 

Final Radiological 

Release Report, 

Buildings 242, 243, 

295, 319, 360, 787, 

832, and 1789 

March 2008 

by 

Weston Solutions 

Inc. 

CDPH 

01/30/2008 

Building was restricted from receiving and/or components containing radioactive materials

knowledge of radiological materials are availmaterials being handled by the El Toro DRMof general radioactive materials may have beyear 2000, a stationwide HRA was conductefurther radiological investigation for Building confirmation radiological survey was compleresults were presented in the Final RadiologMarch 2008. CDPH approved unrestricted reletter dated 01/30/2008. 

Sources: EBS; Earth Tech, Final Environmental Baseline Survey, Former Marine Corps Air Station, El Toro, California (Sept. 2003); and Review of Recor
LEGAL_US_W # 74606800.1 

FOST #7: Locations of Concern 
LEGAL_US_W # 74606800.1 

FOST #7 

Locations of Concern 

LOC ID 

Building 

Number/ 

Location 

Description Closure Report Title/Date NFA Letter Agency/Date Notes 

Carve-Out lI-Q 

TAA 658 658 < 90-day 

Accumulation 

Point 

Addendum to 

Closure Report for 

TAA 658 

05/27/2003 

By Shaw 

DTSC 

09/01/2004 

TAA 658 is also known as SWMU/AOC 171. sampling was completed in March 2003. An was submitted on 05/27/2003 to DTSC and NFA recommendation in a letter dated 09/01

TAA 698 698 < 90-day 

Accumulation 

Point 

Closure Report 

TAA 698 

06/06/2003 

By 

Shaw 

DTSC 09/28/2004 TAA 698 is also known as SWMU/AOC 252. 

completed in February 2003. A closure repo06/06/2003 to DTSC and DTSC concurred win a letter dated 09/28/2004. 

TAA 779 779 < 90-day 

Accumulation 

Point 

Addendum to 

Closure Report 

TAA 779 

02/05/2003 

By 

IT Corp. 

09/07/2004 TAA 779 is also known as SWMU/AOC 227. 

completed in December 2002. An addendum submitted on 02/05/2003 to DTSC and DTSC recommendation in a letter dated 09/07/200

APHO 25 Agua Chinon 

Wash 

Disturbed Ground 

and Excavation 

Summary Report, 

APHO 25, 

Mounded Material 

08/10/1999 

By 

NAVFAC EFD SW 

DTSC 

08/31/1999 

U.S. EPA 

10/06/1999 

RWQCB 

03/31/2000 

APHO 25 is located near Agua Chinon Washwere reviewed and a Summary Report recomsubmitted in 1999. Regulatory concurrence o
LEGAL_US_W # 74606800.1 

Acronyms and Abbreviations AOC = Area of Concern IRWD = Irvine Ranch Water District RCRA = R

R

APHO = Aerial Photograph Anomaly IT = IT Corporation RI = RAST = aboveground storage tank JEG = Jacobs Engineering Group RFA = RAVGAS = Aviation gasoline JP-5 = Jet Propulsion Fuel, Grade 5 RMA = RBNI = Bechtel International, Inc. < = less than ROD = RBRAC = Base Realignment and Closure LOC = Location of Concern RWQCB = R

B

CDPH = California Department of Public Health LQ = Liquid SAIC = S

I

CDHS = California Department of Health 

Services 

 MCAS = Marine Corps Air Station SGU = S

CDM = Camp Dresser & McKee MSC = miscellaneous ST = SCO = Carve Out NA = not applicable SVE = SDHA = Department of Health Services NAVFAC SW = Naval Facilities Engineering 

Command, Southwest 

 SWMU = S

DOJ = Department of Justice NFA = No Further Action TAA = TDON = Department of the Navy OCHCA = Orange County Health Care Agency TFA = TDRMO = Defense Reutilization and Marketing 

Office 

 OCWD = Orange County Water District Unk = U

DTSC = Department of Toxic Substances 

Control 

 OHM = OHM Remediation Services Inc. UST = u

EBS = Environmental Baseline Survey OPS = Operating Properly and Successfully U.S. EPA = U

P

ECP = Environmental Condition of Property OU = Operable Unit VSI = vEPA = Environmental Protection Agency OWS = oil/water separator VOC = vEX = Excavation PCB = polychlorinated biphenyl FA = Further Action ppm = Part per million FOST = Finding of Suitability to Transfer PRG = preliminary remediation goal FS = Feasibility Study PRL = potential release location GW = Groundwater RAD = radiological HRA = Historical Radiological Assessment RCRA = Resource Conservation and 

Recovery Act 

HHRA = Human Health Risk Assessment RI = Remedial Investigation ID = Identification RFA = RCRA Facility Assessment IDP = Irvine Desalter Project RMA = RMA Land Construction Inc. IRP = Installation Restoration Program ROD = Record of Decision