AppendixEl Toro Former Marine Corps Air Station (MCAS)El Toro, California:No Further Action Determinations Associated with Locations of Concern,Organized by Finding of Suitability to Transfer (FOST)2013LEGAL_US_W # 74606800.11FOST #1: Locations of ConcernLEGAL_US_W # 74606800.12FOST #1Locations of Concern Within Transfer Parcels I-A, II-A, and III-ATransferparcel LOC IDBuildingNumber/Location DescriptionClosureReportTitle/Date NFA Letter Agency/Date Notes ECP CategoryNavy Sale Parcel II-A TAA 10 10 < 90-Day Accumulation Point ClosureReport,TAA 1011/7/2002byITDTSC3/4/2003SWMU/AOC 27. Sampling resultsexceeded residential PRGs.Additional sampling was conductedin September 2002. Concentrationsdid not exceed PRGs; Based on riskscreening results, DTSC concurredwith NFA in a letter dated 3/4/2003.The 2002 VSI conducted in supportof the EBS did not identify visiblesigns of a release. No further actionrequired.3I-A TAA 77 77 < 90-Day Accumulation Point ClosureReport,TAA 7712/23/1998byOHMDTSC3/9/1999Regulatory agency concurrence ofNFA recommendation has beenobtained. No further action required.3I-A TAA 289 289 < 90-Day Accumulation Point ClosureReport,Former TAA2893/28/2001byOHMDTSC 10/10/2003 SWMU/AOC 70. Sampling resultsindicated concentrations ofcontaminants between residentialand industrial PRGs; additionalhuman health risk analysis wasconducted based on future land use.Based on risk screening results,DTSC concurred with NFA in a letterdated 10/10/2003. No further actionrequired.3I-A TAA 626 626 < 90-Day Accumulation Point SummaryReport,TAA 6268/15/2001byNAVFAC EFDSouthwestDTSC8/20/2001SWMU/AOC 158. Summary reportprepared 15 August 2001recommended NFA and regulatoryconcurrence obtained. No furtheraction required.3LEGAL_US_W # 74606800.13FOST #1Locations of Concern Within Transfer Parcels I-A, II-A, and III-ATransferparcel LOC IDBuildingNumber/Location DescriptionClosureReportTitle/Date NFA Letter Agency/Date Notes ECP CategoryI-A APHO 1 Tank FarmNo. 3Stains and Wet Soil SummaryReportand SummaryReportAddendum,APHO 11/27/2000 and4/11/2000byNAVFAC EFDSouthwestDTSC 7/6/2000RWQCB 10/18/2000The review of historical documentsand maps and site inspections,including the 2002 VSI conducted aspart of the EBS, were conducted aspart of this site evaluation. Soilsampling results obtained during theremoval of Tank Farm 3 were foundto be below residential PRGs. As aresult, regulatory agency concurrenceof NFA recommendation has beenobtained. No further action required.3I-A APHO 58 Tank FarmNo. 3Open Storage Area SummaryReport,APHOs 23,27, 58 (Area2) 3/7/2000byNAVFAC EFDSouthwestRWQCB 10/18/2000 Sampling results below residentialPRGs. Site evaluated as AnomalyArea 2. Regulatory agencyconcurrence of NFA recommendationhas been obtained. No further actionrequired.3Navy Sale Parcel IIII-A RFA 46 163 VehicleMaintenanceandParking/DRMOClosureReport,SWMU 465/28/1999 byOHMandSupplement toClosureReport,SWMU 46 byOHMDTSC 8/10/1999 TRPH was identified during RFAsampling visit. DTSC concurred withNFA in a letter dated 8/10/1999. Nofurther action required.3LEGAL_US_W # 74606800.14FOST #1Locations of Concern Within Transfer Parcels I-A, II-A, and III-ATransferparcel LOC IDBuildingNumber/Location DescriptionClosureReportTitle/Date NFA Letter Agency/Date Notes ECP CategoryII-A APHO 12 DRMO YardNo. 2Stains and Wet Soil SummaryReport,APHO 1211/15/1999byNAVFAC EFDSouthwestDTSC 2/1/2000RWQCB 10/18/2000No evidence of staining or a releaseidentified during 2002 VSI conductedin support of the EBS. Limiteddetection of constituents of concernat surrounding LOCs. Regulatoryagency concurrence of NFArecommendation has been obtained.No further action required.3II-A APHO 31 Golf Course –Hole No. 5Disturbed GroundandExcavationSummaryReport,Anomaly Area5 (APHOs 31,43, 66, 67, &68) 11/1/2000by OHMandAddendum toSummaryReport,Anomaly Area5 5/9/2001by OHMDTSC 2/11/2003RWQCB 10/11/2001Geophysical survey and soilsampling were conducted.Geophysical survey results indicatedpossible debris, which was verified tobe interference from a clay layerand roadbed material. Soil samplingresults indicated concentrationsbelow PRGs. No evidence ofground disturbance identified during2002 VSI conducted in support ofthe EBS. Regulatory agencyconcurrency of NFA recommendationhas been received. Site evaluated asAnomaly Area 5. No further actionrequired.3II-A APHO 43 Golf Course –Hole No. 5Disturbed GroundandExcavationSummaryReport,Anomaly Area5 (APHOs 31,43, 66, 67, &68) 11/1/2000by OHMandAddendum toSummaryReport,Anomaly Area5 5/9/2001by OHMDTSC 2/11/2003RWQCB 10/11/2001Geophysical survey and soilsampling were conducted.Geophysical survey results indicatedpossible debris, which was verified tobe interference from a clay layerand roadbed material. Soil samplingresults indicated concentrationsbelow PRGs. No evidence ofground disturbance identified during2002 VSI conducted in support ofthe EBS. Regulatory agencyconcurrency of NFA recommendationhas been received. Site evaluated asAnomaly Area 5. No further actionrequired.3LEGAL_US_W # 74606800.15FOST #1Locations of Concern Within Transfer Parcels I-A, II-A, and III-ATransferparcel LOC IDBuildingNumber/Location DescriptionClosureReportTitle/Date NFA Letter Agency/Date Notes ECP CategoryII-A APHO 66 841 Disturbed Ground andExcavationSummaryReport,Anomaly Area5 (APHOs 31,43, 66, 67, &68) 11/1/2000byOHMandAddendum toSummaryReport,Anomaly Area5 5/9/2001by OHMRWQCB 10/11/2001DTSC 2/11/2003Geophysical survey and soilsampling were conducted.Geophysical survey results indicatedpossible debris, which was verified tobe interference from a clay layerand roadbed material. Soil samplingresults indicated concentrationsbelow PRGs. No evidence ofground disturbance identified during2002 VSI conducted in support ofthe EBS. Regulatory agencyconcurrency of NFA recommendationhas been received. Site evaluated asAnomaly Area 5. No further actionrequired.3II-A APHO 67 841 Disturbed Ground andExcavation SummaryReport,Anomaly Area5 (APHOs 31,43, 66, 67, &68) 11/1/2000by OHMandAddendum toSummaryReport,Anomaly Area5 5/9/2001by OHMDTSC 2/11/2003 Geophysical survey and soilsampling were conducted.Geophysical survey results indicatedpossible debris, which was verified tobe interference from a clay layerand roadbed material. Soil samplingresults indicated concentrationsbelow PRGs. No evidence ofground disturbance identified during2002 VSI conducted in support ofthe EBS. Regulatory agencyconcurrency of NFA recommendationhas been received. Site evaluated asAnomaly Area 5. No further actionrequired.3LEGAL_US_W # 74606800.16FOST #1Locations of Concern Within Transfer Parcels I-A, II-A, and III-ATransferparcel LOC IDBuildingNumber/Location DescriptionClosureReportTitle/Date NFA Letter Agency/Date Notes ECP CategoryII-A APHO 68 841 Open Storage Area SummaryReport,Anomaly Area5 (APHOs31, 43, 66,67, &68) 11/1/2000byOHMandAddendum toSummaryReport,Anomaly Area5 5/9/2001by OHMRWQCB 10/11/2001DTSC 2/11/2003Geophysical survey and soilsampling were conducted.Geophysical survey results indicatedpossible debris, which was verified tobe interference from a clay layerand roadbed material. Soil samplingresults indicated concentrationsbelow PRGs. No evidence ofground disturbance identified during2002 VSI conducted in support ofthe EBS. Regulatory agencyconcurrency of NFA recommendationhas been received. Site evaluated asAnomaly Area 5. No further actionrequired.3II-A APHO 85 294 Trench InformationPackage,APHO 854/21/2003 byNAVFAC EFDSouthwestandNFADeterminationforAPHO’s (sitevisit by DTSCon6/13/2003)DTSC 6/25/2003RWQCB 8/14/2003Identified on a 1946 photograph. Atrench or drainage channel islocated in this area. The trench islocated near several potentialcontamination sources. IRP Site19, IRP Site 25-Agua Chinon Wash,TAA 371A (SWMU 107), TAA 371 B(SWMU 242), and a segment of aJP-5 pipeline (MSC JP5) are all nearthis trench or drainage channel. Thesampling conducted for these sitesare considered representative forAPHO 85 and all sites haveachieved a no further actionstatus. No further action required.3Notes: Sites noted with a SWMU/AOC designation were originallyidentified during the RFA, although these designations may not have been appropriate for some LOCs. All siteslisted are previously-identified LOCsand 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, orrestrictions are required for any of the LOCs.Operation and Maintenance requirements are not applicable.LEGAL_US_W # 74606800.17Public outreach activities were effected through the public comment period for the FOST (April 28 to May 28, 2003 and May 3 toJune 17, 2004) and Restoration Advisory Boardmeetings. 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 # 74606800.18FOST #2: Locations of ConcernLEGAL_US_W # 74606800.19FOST #2Locations of ConcernLOC IDBuilding Number/LocationDescriptionClosure ReportTitle/DateNFA LetterAgency/DateNotesECPCategoryTransfer Parcel II-TRFA 204 (alsoknown as VehicleWash Rack 204)761Vehicle Wash RackFinal SiteAssessment Report,SWMU 2049/23/2002DTSC 8/22/2000RWQCB12/18/2002Inactive wash rack. OWS 761Ais associated with this washrack. Final RFA Reportrecommended repair of cracks inwash rack surface based onsampling visit (JEG 1993). Soilsamples were collected at thewash rack and adjacent tanksites, UST 761 B and OWS761A, in 2002. Regulatoryconcurrence with NFArecommendation obtained. Nofurther action required.3LEGAL_US_W # 74606800.110FOST #2Locations of ConcernLOC IDBuilding Number/LocationDescriptionClosure ReportTitle/DateNFA LetterAgency/DateNotesECPCategoryTAA761761< 90-DayAccumulation PointSummary Report,Former TAA 761,SWMU 236 9/20/2002byNAVFAC EFDSouthwestDTSC 3/10/2003SWMU/AOC 236. Investigated inassociation with IRP Site 6. Nofurther action required.3Transfer Parcel III-CRFA 268 (also knownas Vehicle Wash Rack268)240Vehicle Wash RackFinal RCRA FacilityAssessment (RFA)Report 7/1993 byJacobs EngineeringGroupandFinal Addendum toRFA Report 5/1996 By:Bechtel NationalDTSC 7/23/1996Inactive vehicle wash rack. Sitewas identified in the RFA andhas been investigated. NFAstatus identified in Final RFAReport (JEG 1993) andregulatory concurrenceobtained. No further actionrequired.3TAA 240240< 90-DayAccumulation PointClosure Report, TAA2406/23/2003DTSC 12/30/2003SWMU/AOC 64. Closure reportprepared 23 June 2003recommending NFA; regulatoryconcurrence obtained. Nofurther action required.3Notes: 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 (USMC)/Southwest Division,Naval Facilities Enfineering Command (SWDIV), Final Finding ofSuitability to Lease, for Carve-outs within Parcela I,II and III, Former Marine Corps Air Station El Toro, California (July,2004).LEGAL_US_W # 74606800.111FOST #4: Locations of ConcernLEGAL_US_W # 74606800.112FOST #4Locations of ConcernLOC IDBuilding Number/LocationDescriptionClosure ReportTitle/DateNFI LetterAgency/DateNotesCarve-Out l-BRFA 164 Demolished Vehicle Wash Rack651Final RCRA FacilityAssessment (RFA)Report 7/1993andFinal Addendum toRFA Report 5/1996DTSC 7/23/1996 Inactive vehicle wash rack.Site was identified in the RFA and hasbeen investigated. DTSC concurred with NFA recommendation ina letter dated 7/23/1996. No further action required.TAA 651A Demolished < 90-DayAccumulation PointSummary Report forFormer TAA 651A10/15/2001 &Information Packageon 1/7/2003 &10/8/2003DTSC 10/15/2003 TAA 651A was a metal storage shed located northwest quadrantof the Station on the loading dock of Building 651. Samplingresults below residential PRGs. DTSC concurred with NFArecommendation in a letter dated 10/15/2003. No further actionrequiredTAA 651B Demolished < 90-DayAccumulation PointSummary Report forFormer TAA 651B10/15/2001 &InformationPackage on6/7/2006DTSC 6/22/2006 Former accumulation area on asphalt-paved area adjacent toBuilding 651. TAA 651B is located northwest quadrant of theStation. Sampling results below residential PRGs. DTSCconcurred with NFA recommendation in a letter dated 6/22/2006.No further action requiredSRU-1 439 Medical and DentalFacility 439Draft SummaryReport for Group IVPRLs March 2008EPA 4/17/2008DTSC 8/21/2008SRU 1 was further investigated as PRL 439. NFI Status identifiedin Draft Summary Report for Group IV PRLs and EPAconcurrence obtained, NFI Status identified in DTSC letter dated8/21//2008.LEGAL_US_W # 74606800.113FOST #4Locations of ConcernLOC IDBuilding Number/LocationDescriptionClosure ReportTitle/DateNFI LetterAgency/DateNotesSRU-2 Demolished Silver RecoveryUnitTechnicalMemorandum SRU2, September 9,2002, Final EBS,Sept. 2003, andInformation PackageTechnicalMemorandum forSRU 2, 2/11/2004DTSC 3/23/2004 SRU 2 associated with photograph developing equipment inBuilding 443. Historical record search, visual inspection, and soilsampling was conducted from 2002 to 2003 SRU 2 was furtherevaluated as PRL 443. NFI Status identified in DTSC letter dated3/23/2004RAD Unknown Suspected FormerRadium PlaqueAdaptometerBuilding wasidentified on a 1944drawing as beingsituated on “C”Street, approximatelytwoblocks north of theTrabuco RoadStation Gate.Final RadioiogicalRelease ReportRAD ADAPT Bldg.June 2006CDHS 6/19/2006EPA 9/12/2005Building may have been part of a dispensary and would havebeen used for testing the nightvision of personnel. The onlyradioactive equipment that would have been used within thefacility was a metal disc coated with radium/phosphor compoundencapsulated in transparent plastic. Night vision testing wasdiscontinued in 1951. Building maynever have been constructedbecause there was no building number assigned to the building,no construction drawings, and noevidence of a building (i.e.,foundation, disturbed soil, etc.). Although, it could not bedetermined whether the building was ever constructed at formerMCAS El Toro, the 2000 HRA recommended further radiologicalinvestigation for the area associated with the footprint of thissuspected building. During the year 2000, a stationwide HRA wasconducted. The HRA recommended further radiologicalinvestigation for the Suspected Former Radium PlaqueAdaptometer Building prior to final disposition. A radiologicalsurvey was completed in 2001 and the results were presented ina Final Radiological Release Report dated June 2006. CDHSagreed with the findings of the report and granted NFA includingunrestricted release on 6/19/2006.Carve-Out I-ETAA 2 Demolished < 90-DayAccumulationPoint/HazardousMaterials StorageClosure Report ForTemporaryAccumulation AreaSite 2, FormerMarine Corps AirStation, El Toro,Irvine, California7/2006.DTSC 9/6/2006 Former TAA Site 2 consisted of two units: Unit 1 wasapproximately 150 feet long by 100 feet wide and was locatedsouthwest of Building 2; Unit 2 was approximately 100 feet wideby 100 feet wide and was located northeast of Building 2. Visualinspections were conducted and soil samples were collected fromeight locations at Former TAA Site 2 during 2005. A closurereport with a screening risk evaluation was completed in 2006.DTSC concurred with NFA. No further action required.Carve-Out l-GLEGAL_US_W # 74606800.114FOST #4Locations of ConcernLOC IDBuilding Number/LocationDescriptionClosure ReportTitle/DateNFI LetterAgency/DateNotesTAA 7 7 < 90-DayAccumulation PointSummary Report forFormer TAA 711/30/2005DTSC 3/16/2006 Former TAA 7 was located northeast of Building 7 near the edgeof the aircraft parking apron. The site was approximately 10 feetwide by 20 feet long, and paint storage lockers were previouslylocated on the site. Soil samples were collected from borings andvisual inspections were conducted at Former TAA 7 during 1995and during 2005. A Summary Report with a screening riskevaluation was submitted in 2005. DTSC concurred with nofurther action in their letter dated 3/16/2006. No further actionrequired.TAA7B 7 < 90-DayAccumulation PointSummary Report,TAA 7B7/17/2002DTSC 3/4/2003 TAA 7B was located approximately 100 feet southwest ofBuilding 7. Drums were stored at the site from approximately1992 through 1996. Historical records were reviewed, visualinspections were conducted, and the findings were presented in aSummary Report dated 2002. No further action is required.Carve-Out l-HTAA 51 Demolished < 90-DayAccumulation PointClosure ReportFramer TAA 51July 2006DTSC 8/14/2006 SWMU/AOC 33. Former TAA 51 is located Northeast comer ofBuilding 51. Soil sampling was performed A Summary Reportwith a screening risk evaluation was submitted in 2006. DTSCconcurred with no further action status for TAA 51 in their letterdated 8/14/2006. No further action required.Carve-Out I-lSRU 3A Demolished Reproduction Office Draft SummaryReport for Group IVPRLs March 2008EPA 4/17/2008DTSC 8/21/2008SRU 3A was further investigated and sampled as PRL 46. NFIstatus identified in Draft Summary Report for Group IV PRLs andEPA concurrence obtained for NFI. NFI Status identified in DTSCletter dated 8/21/2008.Carve-Out l-JTAA 22 Demolished < 90-DayAccumulation PointClosure Report,Former TemporaryAccumulation Area2211/4/2003.DTSC 7/31/2006 Former TAA 22 included two units, each with a concrete pad,sump, and canopy; each unit was approximately 35 feet long and15 feet wide. TAA 22 was located east of Building 22. A visualinspection was conducted, soil samples were collected fromborings during 2003, and a closure report with a screening riskevaluation was completed. DTSC provided comments in 2006and a response to comments was completed in 2006. DTSCconcurred with no further action in their letter dated 7/31/2006.No further action required.LEGAL_US_W # 74606800.115FOST #4Locations of ConcernLOC IDBuilding Number/LocationDescriptionClosure ReportTitle/DateNFI LetterAgency/DateNotesCarve-Out ll-GAPHO 118 Demolished Disturbed GroundPerimeter RoadSupplementaryInformationPackage for APHO118 10/19/2006DTSC 3/25/2007RWQCB 1/16/2007Identified on a 1979 photograph. A large area of disturbed ground(200 by 250 feet) was noted in this photograph. This area islocated near Anomaly Area 5, containing APHOs 31, 43, 66, 67,and 68. Four of these anomalies are areas of disturbed ground.After investigation of Anomaly Area 5, a no further actiondeclaration was granted in February 2003. APHO 118 bordersthe northeastern end of the investigation area for IRP Site 5,Perimeter Road Landfill. Due to the proximity of this APHO to IRPSite 5, further evaluation of this APHO was recommended duringthe development of a remedial program for IRP Site 5. Visualinspections and exploratory trenching was performed at APHO118. Based on this investigations, RWQCB concurred with NFAon 1/16/2007 and DTSC concurred with NFA on 4/25/2007.Carve-Out ll-IRFA 213 764 Vehicle Wash Rack Data SummaryReport, Solid WasteManagement Unit213 12/13/2002 andSupplementaryInformationPackage, SolidWaste ManagementUnit (SWMU) 213,Vehicle Wash rack atBuilding 39212/27/2002RWQCB 2/20/2003DTSC 3/3/2003RFA 213, an abandoned vehicle wash rack, is located adjacent tothe southeastern side of Building 392. The former UST 764A andthe former OWS 764B, located adiacent to the northeastern sideof the wash rack, were associated with this wash rack. Soilsamples were collected from four shallow borings through thewash rack during the RFA samplingvisit in 1992. Cracks in thewash rack were repaired during 1998. Additional soil sampleswere collected from five borings during 2002 in response toDTSC comments dated 3/30/2001. Based on sampling resultsand a screening risk evaluation, the RWQCB and DTSC haveconcurred with recommendation of no further action. No furtheraction is required.TAA 392A 392 < 90-DayAccumulation PointClosure Report,TAA 392A and 392B2/27/2001DTSC 3/10/2003 TAA 392A was also known as SWMU/AOC 124. The TAAconsisted of a concrete pad with berm, sump, and canopy, andwas located north of Building 392. Soil samples were collectedduring the RFA Sampling Visit in 1992. Additional soil sampleswere collected during November 1999 and the results with ascreening risk evaluation were presented in the Closure Reportdated 2001. No further action is required.LEGAL_US_W # 74606800.116FOST #4Locations of ConcernLOC IDBuilding Number/LocationDescriptionClosure ReportTitle/DateNFI LetterAgency/DateNotesTAA 392B 392 < 90-DayAccumulation PointClosure Report,TAA 392A and 392B2/27/2001DTSC 3/10/2003 TAA 392B was also known as SWMU/AOC 271. The TAAconsisted of a concrete pad with berm and a sump, and waslocated north of Building 392. Soil samples were collected duringthe RFA Sampling Visit in 1992. Additional soil samples werecollected during November 1999 and the results with a screeningrisk evaluation were presented inthe Closure Report dated 2001.No further action is required.LEGAL_US_W # 74606800.117FOST #5: Locations of ConcernLEGAL_US_W # 74606800.118FOST #5Locations of ConcernLOC IDBuildingNumber/Location DescriptionClosure ReportTitle/DateNFA LetterAgency/Date NotesCarve-Out I-FTAA 5A 5 < 90-DayAccumulation PointSummary Report,TAA 5A 07/17/2002byITDTSC 03/04/2003 TAA 5A, also known asSWMU/AOC 25, was identified during a 1991visual site inspection. Light stains were observed on the concretesurrounding the TAA. However, during subsequent inspections from 1993through 2000, no stains or significantcracks were observed. No visiblesigns of a release were noted during the 2002 VSI conducted in supportof the EBS. NFA was recommended and DTSC concurred with NFA. Nofurther action required.TAA 5B 5 < 90-DayAccumulation PointClosure Report,TAA 5B 11/24/2008byBRAC PMO WestRWQCB 11/24/2008DTSC 04/08/2009TAA 5B, also known as SWMU/AOC26, was identified as stained soilduring a site visit conducted insupport of the RFA. Subsequent soilsampling identified TPH in the soils at levels below residential PRGs. Theremoval of contaminated soils was conducted in May 2008. A closurereport was distributed on 11/24/2008 recommending NFA. RWQCBconcurred with NFA in a letter dated 11/24/2008, and DTSC concurredwith NFA in a letter dated 04/08/2009.APHO 26 Crash Crew PitNo. 2Disturbed Groundand ExcavationSummary Report,APH0 2610/30/1999byNAVFAC SWDTSC 01/04/2000 APHO 26, also known as SAIC anomaly 189, was identified on an aerialphotograph dated 08/28/1968. SAIC description: “There is an excavation(EX) with possible liquid (LQ) located at the intersection of the taxiways,about 1,200 feet north of Runway 25R and 1,100 feet west of Runway34L. The purpose of the excavation is unknown. Investigation of site’shistory is recommended.” Historical facility records were reviewed, visualinspections were conducted, and thefindings were documented in theSummary Report dated 10/30/1999. No further action is required.APHO 92 Compass RoseNo. 1Stain InformationPackage, APHOs83, 91, and 9204/17/2003byNAVFAC SWRWQCB 08/14/2003DTSC 04/20/2004APHO 92, also known as SAIC anomaly 117, was identified on an aerialphotograph dated 06/28/1960 photograph. SAIC description: “There is apossible stain (ST) around abandoned Compass Rose No. 1, near KStreet and N 1 st Place. Additionalinvestigation is recommended.”Historical facility records were reviewed, visual inspections wereconducted, and the findings were presented in the “Information Package,APHO 83 (SAIC 8), APHO 91 (SAIC 112), and APHO 92 (SAIC 117),Former Marine Corps Air Station, El Toro, California” dated 04/17/2003.DTSC concurred with no further action on 04/20/2004. RWQCBconcurred with no further actionon 08/14/2003. No further action isrequired.Carve-Out II-ELEGAL_US_W # 74606800.119FOST #5Locations of ConcernLOC IDBuildingNumber/Location DescriptionClosure ReportTitle/DateNFA LetterAgency/Date NotesRFA 14 606 Drop Tank FuelStorage AreaSummary Report,Site Verification atFormer AircraftDrop Tank FuelStorage Area nearBuilding 606,SWMU Number 1411/09/1999byNAVFAC SWRWQCB 03/31/2000 RWQCB concurred with NFA in a letter dated 03/31/2000. No furtheraction required.RFA 43 139 Drum Storage Area Closure Report,Solid WasteManagement Unit43 05/09/2006byCDM FederalPrograms Corp.DTSC 06/05/2006 Site also identified as SWMU 43. RFA site 43 was associated withBuilding 139, and received site closure concurrence from DTSC in 2006RFA 150 605 (on tarmac) Aircraft Wash Area Final RCRA FacilityAssessment (RFA)Report July 1993 byJacobs EngineeringGroupandFinal Addendum toRFA ReportMay 1996 byBechtel NationalDTSC 07/23/1996 Aircraft wash area situatedon tarmac. Site is inactive. OWS 605C isassociated with this wash rack. NFA status identified in Final RFA Report(JEG 1993) and DTSC concurred with NFA recommendation in a letterdated 07/23/1996. No further action required.LEGAL_US_W # 74606800.120FOST #5Locations of ConcernLOC IDBuildingNumber/Location DescriptionClosure ReportTitle/DateNFA LetterAgency/Date NotesRFA 152 606 (on tarmac) Aircraft Wash Area Final RCRA FacilityAssessment (RFA)Report July 1993 byJacobs EngineeringGroupandFinal Addendum toRFA Report 5/1996by Bechtel NationalDTSC 07/23/1996 Aircraft wash area on the tarmac outside of Building 606 (MaintenanceHangar). Site is inactive. NFA statusidentified in Final RFA Report (JEG1993) and DTSC concurred with NFA recommendation in a letter dated07/23/1996. No further action required.RFA 267 605 Drop Tank FuelStorage AreaFinal RCRA FacilityAssessment (RFA)Report July 1993 byJacobs EngineeringGroupandFinal Addendum toRFA ReportMay 1996 byBechtel NationalDTSC 07/23/1996 NFA status identified inFinal RFA Report (JEG 1993) and regulatoryconcurrence obtained. Nofurther action required.TAA 115 115/914 < 90-DayAccumulation PointClosure Report,Former TemporaryAccumulation AreaSite 115 07/20/2006byBrown and CaldwellDTSC 12/28/2006 Site also identified as SWMU/AOC 39. Sampling results below residentialPRGs. No visible signs of release noted during 2002 VSI conducted insupport of the EBS. NFA recommended based on RFA sampling resultsand the 2002 VSI. DTSC concurrend with NFA. No further actionrequired.TAA 605 605/912 < 90-DayAccumulation PointClosure Report,TAA 605byShawEnvironmental Inc.DTSC 09/13/2004 SWMU/AOC 149. Sampling results below residential PRGs. NFA wasrecommended and DTSC concurred with NFA. No further action required.LEGAL_US_W # 74606800.121FOST #5Locations of ConcernLOC IDBuildingNumber/Location DescriptionClosure ReportTitle/DateNFA LetterAgency/Date NotesTAA 606 606/913 < 90-DayAccumulation PointClosure Report,TAA 605byShawEnvironmental Inc.DTSC 09/16/2004 Site also identified as SWMU/AOC 255. Sampling results belowresidential PRGs. NFA was recommended and DTSC concurred withNFA. No further action required.APHO 99 139 Soil Stains InformationPackage, APHO 87,90, 98, 99, 100, and109 05/2003byNAVFAC SWRWQCB 08/14/2003 Identified on a 1967 photograph. The anomaly was recorded as threeparallel lines on the westerly side of Facility 139. Facility 139 was a publicworks shop located east of former Tank Farm 4. The area of the anomalyis within the former tank farm boundaries. All fuel tanks were removedand the site was closed in 1996. Based on the location and the fact thatall sites within the former tank farm are closed, no further action wasrecommended for APHO 99. Based on a VSI conducted in June 2003,RWQCB concurred with no further action in a letter dated 08/14/2003.APHO 110 121 Liquid InformationPackage, APHO110 04/28/2003byNAVFAC SWRWQCB 08/14/2003 Identified on a 1974 photograph.The facility associated with this APHO isa fire station and the liquid flowing from the facility is probably water usedin routine operations at the fire station. Based on a VSI conducted inJune 2003, RWQCB concurred with no further action in a letter dated08/14/2003APHO 119 Edge of AircraftApron between605 and 606Stains InformationPackage, APHO119 04/22/2003 byNAVFAC SWandNFA Determinationfor APHOs (site visitby DTSC on06/13/2003)DTSC 06/25/2003RWQCB 08/14/2003Identified on a 1983 photograph. The APHO area was visually inspectedin April 2003. No evidence of staining was found. An inlet for the stormdrain was noted in that location. Two TAAs (TAA 605 [SWMU 149] andTAA 606 [SWMU 255]) are between Facility 605 and 606. NFA has beenobtained for these TAAs (see above).Based on a Visual Site Inspectionconducted in June 2003, DTSC and RWQCB concurred withrecommendation of NFA for APHO 119. No further action required.PCB 643 643 3 oil-filled cutouts Final EBS(09/12/2003)By Earth TechDTSC 09/25/2003USEPA09/25/20033 oil-filled cutouts with less than 1 ppm PCB located at the northernportion of the building.LEGAL_US_W # 74606800.122FOST #5Locations of ConcernLOC IDBuildingNumber/Location DescriptionClosure ReportTitle/DateNFA LetterAgency/Date NotesPCB 892 892 3 oil-filled cutouts Final EBS(09/12/2003)By Earth TechDTSC 09/25/2003USEPA09/25/20033 oil-filled cutouts with less than 0.005 ppm PCB, noted to be leakingduring 2003 inspection.Carve-Out II-MRFA 178 673 Vehicle Wash Rack Final RCRA FacilityAssessment (RFA)Report July 1993 byJacobs EngineeringGroupandFinal Addendum toRFA ReportMay 1996 byBechtel NationalDTSC 07/23/1996 Inactive vehicle wash rack.OWS 673A is associated with this wash rack.NFA status identified in Final RFA Report (JEG 1993) and DTSCconcurred in a letter dated 07/23/1996. No further action required.RFA 181 673 Land/Farming Area Final RCRA FacilityAssessment (RFA)Report July 1993 byJacobs EngineeringGroupandFinal Addendum toRFA ReportMay 1996 byBechtel NationalDTSC 07/23/1996 NFA status identified inFinal RFA Report (JEG 1993) and regulatoryconcurrence obtained. Nofurther action required.RFA 185 673 Drum Storage Area InformationPackage, SolidWaste ManagementUnit 18512/07/2005byNavy BRAC PMOWestDTSC 07/31/2006 RFA site 185 was associatedwith Building 673, and received site closureconcurrence in 2006.LEGAL_US_W # 74606800.123FOST #5Locations of ConcernLOC IDBuildingNumber/Location DescriptionClosure ReportTitle/DateNFA LetterAgency/Date NotesRFA 264 DRMO YardNo. 3DRMO Yard No. 3 Final RCRA FacilityAssessment (RFA)Report July 1993 byJacobs EngineeringGroupandFinal Addendum toRFA ReportMay 1996 byBechtel NationalDTSC 07/23/1996 NFA status identified inFinal RFA Report (JEG 1993) and regulatoryconcurrence obtained. Nofurther action required.TAA 673 673 < 90-DayAccumulation PointClosure Report,Former TemporaryAccumulation Area673 05/21/2003byShawEnvironmentalDTSC 09/24/2004 Site also identified as SWMU/AOC 186. DTSC concurred with NFA in aletter dated 09/24/2004. No further action required.TAA 772 772 < 90-DayAccumulation PointClosure Report,TAA 77206/26/2003byOHMDTSC 11/07/2003 Site also identified as SWMU/AOC 225. Soil sampling identifiedcontaminants between residential and industrial PRGs. Due to results ofrisk screening, soil management recommended. DTSC concurred withNFA in a letter dated 11/07/2003. No further action required.APHO 20 DRMO YardNo. 3Disturbed Groundand ExcavationSummary Report,APHO 20 & APHO21 11/30/1999byNAVFAC SWDTSC 03/03/2000 Regulatory agency concurrence of NFA recommendation has beenobtained. No further action required.LEGAL_US_W # 74606800.124FOST #5Locations of ConcernLOC IDBuildingNumber/Location DescriptionClosure ReportTitle/DateNFA LetterAgency/Date NotesAPHO 27 DRMO YardNo. 3Stains and Wet Soil Summary Report,APHOs 23, 27, 58(Area 2) 03/07/2000byNAVFAC SWRWQCB 10/18/2000 No evidence of staining ora release identified during 2002 VSI conductedin support of the EBS. Sampling results below residential PRGs.Regulatory agency concurrence of NFA recommendation has beenobtained. No further action required.APHO 38 1789 Disturbed Groundand ExcavationSummary Report,APHO 3812/19/2003 byShawEnvironmentalandRadiologicalRelease Report,IRP Site 1, DRMOYard 3, NBC,APHO 38, PavedArea south ofBuilding 29504/12/2007 byWeston SolutionsDTSC 04/06/2005CDPH 08/20/2007APHO 38 was associated with Building 1789, and received site closureconcurrence from DTSC in 2005 pertaining to release of non-radiologicalconstituents.Radiological investigations were conducted at APHO 38 and resultspresented in a radiological releasereport ((Weston 2007). Based on theresults of these investigations, CDPH concurred with the recommendationfor unrestricted release of APHO 38 in a letter dated 08/20/2007. Nofurther action required.APHO 46 Golf Course –Hole No. 5;overlaps IRPSite 5Disturbed Groundand ExcavationSummary Report,APHO 46January 2005 byEarth TechandRadiologicalRelease Report,IRP Sites 3 and 5(including APHO46), AA 3, andBuilding 244December 2006 byWeston SolutionsDTSC 05/17/2004U.S. EPA03/08/2004RWQCB 05/01/2003CDPH 05/19/2006The extent of the anomaly has been investigated by subsurfacegeophysical survey, which identified only a relatively small area of surficialdebris. Surface debris was also observed during 2002 VSI conducted insupport of the EBS. Characterizationof debris piles and associated areaswas conducted as part of the pre-design investigation for IRP Site 5.Based on the results of the investigations, NFA was recommended in theSummary Report. DTSC concurred with no further investigation pertainingto non-radiological constituents in a letter dated 02/26/2001.Radiological investigations at APHO 46 were conducted in conjunctionwith IRP Site 5 and results presented in a radiological release report(Weston 2006). Based on the results of these investigations, CDPHconcurred with the recommendation for unrestricted release of APHO 46in a letter dated 05/19/2006. No further action required.LEGAL_US_W # 74606800.125FOST #5Locations of ConcernLOC IDBuildingNumber/Location DescriptionClosure ReportTitle/DateNFA LetterAgency/Date NotesRADDRMODRMO Yard 3(RFA 264)Outside storagearea used byDRMO to storescrap and excessmaterials andequipment awaitingdisposition. Areahad been inoperation since the1950s.RadiologicalRelease Report,IRP Site 1, DRMOYard 3, NBC,APHO 38, PavedArea south ofBuilding 29504/12/2007byWeston SolutionsDTSC 07/23/1996CDPH 08/20/2007The yard was restricted from receiving and/or storing equipment andcomponents containing radioactive material. There were no officialrecords or direct knowledge of radiological materials being handled by theEl Toro DRMO. However, during an employee interview, it was statedthat, “Marines could have stored small quantities of radium painted partsand gauges at the storage yard, since it is a regional storage yard.” Noreleases were identified at this site. Site has been determined to requireno further action. Concurrence on theno further action determination wasobtained from DTSC in a letter dated 07/23/1996. During the year 2000, astationwide Historical Radiological Assessment (HRA) was conducted.The HRA recommended further radiological investigation for the DRMOYard 3 prior to final disposition. A radiological survey was completed in2001 and the results were presented in a radiological release report(Weston 2007). CDPH concurred withrecommendation for unrestrictedrelease in a letter dated 08/20/2007.RAD NBC NBC Area(Buildings 787,1789, and 1803and surfaceimpoundments[APHO-38])Buildings andsurfaceimpoundments aresituated north ofthe intersection ofEast Marine Wayand El ToroBoulevard.Buildings supportedtraining ofpersonnel forreadiness fornuclear, biological,and/or chemicalweapons attack.RadiologicalRelease Report,IRP Site 1, DRMOYard No. 3, NBC,APHO 38, PavedArea south ofBuilding 29504/12/2007byWeston SolutionsCDPH 08/20/2007 Building 1789 contained a 4 foot by 6 foot concrete structure inside forstoring non-licensed, radioactive sources. Building 787 and 1803 housedNBC training facilities. These buildings were utilized as offices,training/instruction areas, and training group storage areas. It is notknown whether impoundments at the site were associated with NBCtraining operations. During the year 2000, a stationwide HRA wasconducted. The HRA recommended further radiological investigation forthe NBC Area prior to final disposition. A radiological survey wascompleted in 2001. CDPH concurred with recommendation forunrestricted release in a letter dated 08/20/2007.Carve-Out II-RSRU 3C 457 Dental Clinic Summary Reportfor Group IV PRLsby Earth Tech(March 2008)DTSC 08/21/2008U.S. EPA4/17/2008Site identified as a former SRU at a photography laboratory in adental clinic (SRU 3C). Site was recommended for further evaluationfor potential discharges of contaminants to the building drainagesystem. SRU 3C was investigated as part of PRL 457.The investigations included records review, VSI, and soil sampling.Based on the results of these investigations, no further investigationwas recommended in Summary Report for Group IV PRLs and regulatoryconcurrence was obtained.Source: Earth Tech, Final Environmental Baseline Survey, Former Marine Corps Air Station, El Toro, California (Sept. 2003).LEGAL_US_W # 74606800.126FOST #6: Locations of ConcernLEGAL_US_W # 74606800.127FOST #6Locations of ConcernLOC IDBuildingNumber/LocationDescriptionClosure ReportTitle/DateNFA LetterAgency/DateNotesCarve-Out ll-BRFA 293 130 Cleaning Tank Final RCRA FacilityAssessment (RFA)Report 07/1993 byJEGandFinal Addendum toRFA Report 5/1996by BNIDTSC07/23/1996NFA status identified in 1993 Final RFA Report and regulatoryconcurrence obtained. Nofurther action required.TAA 130A 130 < 90-DayAccumulation PointClosure Report,Former TAA 130Aand TAA 130BJanuary 2004byShawDTSC12/10//2004SWMU/AOC 294. Sampling conducted in 2003. Site closed by DTSC in aletter dated 12/10/2004. No further action required.TAA 130B 130 < 90-DayAccumulation PointClosure Report,Former TAA 130Aand TAA 130BJanuary 2004byShawDTSC12/10/2004SWMU/AOC 295. Sampling conducted in 2003. Site closed by DTSC in aletter dated 12/10/2004. No further action required.TAA 634 634 < 90-DayAccumulation PointClosure ReportMarch 2007byCDMDTSC06/08/2007Sampling conducted in 2006. Closure report requesting NFA submitted in2007. Site was closed by DTSC in a letter dated 06/08/2007. No furtheraction required.LEGAL_US_W # 74606800.128FOST #6Locations of ConcernLOC IDBuildingNumber/LocationDescriptionClosure ReportTitle/DateNFA LetterAgency/DateNotesAPHO 90 Q Street and9th StreetUnidentified Object InformationPackage, APHOs87, 90, 98, 99, 100,and 109 5/2003 byNAVFAC EFDSouthwestandNFA Determinationfor APHO’s (sitevisit by DTSC on6/13/2003)DTSC 6/25/2003RWQCB 8/14/2003Identified on a 1960 photograph. Object was considered a possibleincinerator or chimney. Adjacent structures in the area include a formerpaint shop that has a mezzanine section that could be interpreted as achimney and a former incinerator was located in the general vicinity of theAPHO. The APHO could be the incinerator locatedat Facility 140/140A.This possibility, and the lack of otherevidence in the area, provides thebasis for no further action.No further action required.APHO 109 129/130 Drum Storage InformationPackage, APHOs87, 99, 98, 99, 100,and 109 5/2003 byNAVFAC SWandNFA Determinationfor APHOs (sitevisit by DTSC on06/13/2003)DTSC06/25/2003RWQCB08/14/2003APHO 109 (also known as SAIC 284)was identified as a storage areawith probable drums on an aerial photograph dated 1974. The area islocated near Building 129, Building 130, and Building 745. The APHO 109study area included the investigation area for TAA 130A, TAA 130B, TAA130C, UST 130A, UST 130B, PRL 130, and PRL 745. Based upon avisual inspection conducted in June 2003, DTSC and RWQCB concurredwith recommendation of NFA. No further action required.SRU3B 133 PhotographyLaboratorySummary Reportfor Group IV PRLsMarch 2008byEarth TechDTSC08/21/2008Site identified as a former Silver Recovery Unit at a photographylaboratory. Site was evaluated as part of PRL 133 during the EBS. Soilsamples were collected during 2003. DTSC concurred with the NFA forPRL 133 in a letter dated 08/21/2008. No further action required.LEGAL_US_W # 74606800.129FOST #6Locations of ConcernLOC IDBuildingNumber/LocationDescriptionClosure ReportTitle/DateNFA LetterAgency/DateNotesCarve-Out ll-KTAA 371A 371 < 90-DayAccumulation PointAddendum toSummary Reportfor TAA 371ANovember 2003byShawDTSC12/16/2003SWMU/AOC 107. Soil samples were collected at each site and that DTSCconcurred with no further action.TAA 371B 371/915 < 90-DayAccumulation PointSummary Reportfor TAA 371BJanuary 2009byECSDTSC03/11/2009SWMU/AOC 242. Soil samples were collected at each site and that DTSCconcurred with no further action.LEGAL_US_W # 74606800.130FOST #6Locations of ConcernLOC IDBuildingNumber/LocationDescriptionClosure ReportTitle/DateNFA LetterAgency/DateNotesAPH0 9 Agua ChinonWashStains and Wet Soil Summary Report,APH0 908/31/1999byNAVFAC SWDTSC10/06/1999RWQCB10/06/1999U.S. EPA11/04/1999APHO 9 (also known as SAIC 53) was described as liquid flowing near ahangar on a 1946 aerial photograph. The site coincides approximatelywith the location of Former IRP Site 19, Unit 1 (Northeast Stained Area),also known as MSC ST19A, that was addressed under the petroleumcorrective action program. The visual inspections of APHO 9 wereconducted during 1999. Regulatory agency concurrence of NFArecommendation has been obtained from DTSC and RWQCB on10/06/1999 and U.S. EPA on 11/04/1999. No further action required.Carve-Out II-ORFA 120 390 Vehicle WashRackFinal RCRA FacilityAssessment (RFA)Report 07/1993 byJEGandFinal Addendum toRFA Report05/1996 by BNIDTSC07/23/1996Former vehicle wash rack. Soil samples were collected during the RFASampling visit in 1992 and NFA status identified in 1993 Final RFAReport. DTSC concurrence obtained in a letter dated 07/23/96. Wash rackwas demolished and moved during the removal of the adjacent tanks,UST 762B and OWS 762A, that were closed by OCHCA in a letter dated07/2/97. No further action required.LEGAL_US_W # 74606800.131FOST #6Locations of ConcernLOC IDBuildingNumber/LocationDescriptionClosure ReportTitle/DateNFA LetterAgency/DateNotesRFA 262 390 Fuel Storage Area Final RCRA FacilityAssessment (RFA)Report 07/1993 byJEGandFinal Addendum toRFA Report05/1996 by BNIDTSC07/23/1996Soil samples were collected during the RFA sampling visit in 1992 andNFA status identified in 1993. Final RFA Report and regulatoryconcurrence obtained. Nofurther action required.TAA 390A 390 < 90-DayAccumulation PointClosure Report,TAA 390A and390B05/04/1999byOHMDTSC06/10/1999SWMU/AOC 122. Site closure and regulatory agency concurrence of NFArecommendation has been obtained by DTSC on 06/10/1999. No furtheraction required.TAA 390B 390 < 90-DayAccumulation PointClosure Report,TAA 390A and390B05/04/1999byOHMDTSC06/10/1999SWMU/AOC 261. Site closure and regulatory agency concurrence of NFArecommendation has been obtained by DTSC on 06/10/1999. No furtheraction required.Carve-Out lll-B-1LEGAL_US_W # 74606800.132FOST #6Locations of ConcernLOC IDBuildingNumber/LocationDescriptionClosure ReportTitle/DateNFA LetterAgency/DateNotesRFA 6 Northwest BeeCanyon WashLandfarming Site Final RCRA FacilityAssessment (RFA)Report 7/1993 byJacobs EngineeringGroupandFinal Addendum toRFA Report 5/1996by BNIDTSC07/23/1996No analytes were detected above action levels during RFA sampling visit.NFA status identified in Final RFA Report (JEG, 1993) and regulatoryconcurrence obtained. Nofurther action required.RFA 71 295 < 90-DayAccumulation AreaSummary Report,Solid WasteManagement Unit(SWMU) 7111/4/1999ByITDTSC01/27/2000Site is situated within the investigation boundary of IRP Site 7, Unit 1(North Pavement Edge). DTSC concurred with NFA in a letter dated1/27/2000. No further action required.RFA 216 765 Vehicle Wash Rack Final RCRA FacilityAssessment (RFA)Report 7/1993 byJEG and FinalAddendum to RFAReport 5/1996byBNIDTSC07/23/1996Inactive vehicle wash rack. OWS 765Bis associated with this wash rack.Site was identified in the RFA and has been investigated. A 1989RWQCB letter from 1989 indicates that the surface was free of defects.NFA status identified in Final RFA Report (JEG, 1993) and DTSCconcurred in a letter dated 7/23/96. No further action required.LEGAL_US_W # 74606800.133FOST #6Locations of ConcernLOC IDBuildingNumber/LocationDescriptionClosure ReportTitle/DateNFA LetterAgency/DateNotesRFA 274 31 Stockpiled Soil Final RCRA FacilityAssessment (RFA)Report 7/1993 byJEGandFinal Addendum toRFA Report 5/1996by BNIDTSC7/23/1996NFA status identified in Final RFA Report (JEG, 1993) and regulatoryconcurrence obtained. Nofurther action required.RFA 299 800 Vehicle Wash Rack Final RCRA FacilityAssessment (RFA)Report 7/1993 byJEGandFinal Addendum toRFA Report 5/1996by BNIDTSC07/23/1996Inactive vehicle wash rack. Wash rack was identified in the RFA and hasbeen investigated. Surface of the wash rack was noted to be free ofdefects. NFA status identified in Final RFA Report (JEG, 1993) and DTSCconcurred in a letter dated 7/23/96. No further action required.TAA 31A 31 < 90-DayAccumulation PointAddendum ClosureReport TAA 31A01/13/2003ByNAVFAC SWDTSC07/12/2004SWMU/AOC 272. Sampling results below residential PRGs. No visiblesigns of release noted during 2002 Additional sampling was conducted in2002 and DTSC concurred in a letter dated 07/12/2004 with no furtheraction.TAA 31B 31 < 90-DayAccumulation PointClosure ReportTAA 31B03/27/2001byOHMDTSC01/31/2005Sampling results below residential PRGs. No visible signs of releasenoted during 2002 VSI conducted insupport of the EBS. Additionalsampling conducted in November 1999. DTSC agreed with NFAconcurrence in a letter dated 01/31/2005.LEGAL_US_W # 74606800.134FOST #6Locations of ConcernLOC IDBuildingNumber/LocationDescriptionClosure ReportTitle/DateNFA LetterAgency/DateNotesTAA 671 671 < 90-DayAccumulation PointClosure ReportTAA 671June 2006 andReplacementPages by NAVFACEFD Southwest on12/29/2006DTSC01/03/2007SWMU/AOC 172. November 2005 sampling results below residentialPRGs. NFA recommended. DTSC agreed with the NFA concurrence on01/03/2007.TAA 765 765 < 90-DayAccumulation PointClosure Report,TAA 76507/21/1998byOHMDTSC11/17/1998SWMU/AOC 266. Site closure and regulatory agency concurrence of NFArecommendation has been obtained. No further action required.TAA 771 771 < 90-DayAccumulation PointClosure ReportTAA 771January 2009byCDMDTSC03/20/2009SWMU/AOC 224. Soil removal and sampling was conducted in 2006 and2007. DTSC agreed with the NFA concurrence in a letter dated03/20/2009.LEGAL_US_W # 74606800.135FOST #6Locations of ConcernLOC IDBuildingNumber/LocationDescriptionClosure ReportTitle/DateNFA LetterAgency/DateNotesTAA 800 800 < 90-DayAccumulation PointClosure ReportTAA 800October 2004byShawDTSC11/21/2005SWMU/AOC 229. Sampling results below residential PRGs. NFArecommended. DTSC agreed with the NFA concurrence in a letter dated11/21/2005.APHO 54 Tank FarmNo. 1Disturbed Groundand ExcavationSummary Report,APHO 54, 55, 56, &57 (Area 1)11/19/1999byNAVFAC SWRWQCB10/18/2000Also known as SAIC 144, Site evaluatedas Anomaly Area 1. The site islocated near Former Tank Farm 1 and Former TAA 770. The site wasinspected and soil samples were collected during 1999. Regulatoryagency concurrence of NFA recommendation has been obtained. Nofurther action required.APHO 55 Tank FarmNo. 1Disturbed Groundand ExcavationSummary Report,APHO 54, 55, 56, &57 (Area 1)11/19/1999byNAVFAC SWRWQCB10/18/2000Also known as SAIC 169, Site evaluatedas Anomaly Area 1. The site islocated near Former Tank Farm 1 and Former TAA 770. The site wasinspected and soil samples were collected during 1999. Regulatoryagency concurrence of NFA recommendation has been obtained. Nofurther action required.LEGAL_US_W # 74606800.136FOST #6Locations of ConcernLOC IDBuildingNumber/LocationDescriptionClosure ReportTitle/DateNFA LetterAgency/DateNotesAPHO 56 Tank FarmNo. 1Disturbed Groundand ExcavationSummary Report,APHO 54, 55, 56, &57 (Area 1)11/19/1999byNAVFAC SWRWQCB10/18/2000Also known as EPA 7, Site evaluated as Anomaly Area 1. The site islocated near Former Tank Farm 1 and Former TAA 770. The site wasinspected and soil samples were collected during 1999. Regulatoryagency concurrence of NFA recommendation has been obtained. Nofurther action required.APHO 57 Tank FarmNo. 1Disturbed Groundand ExcavationSummary Report,APHO 54, 55, 56, &57 (Area 1)11/19/1999byNAVFAC SWRWQCB10/18/2000Also known as EPA 36, Site evaluated as Anomaly Area 1. The site islocated near Former Tank Farm 1 and Former TAA 770. The site wasinspected and soil samples were collected during 1999. Regulatoryagency concurrence of NFA recommendation has been obtained. Nofurther action required.APHO 84 PerimeterRoadUnidentified Object InformationPackage, APHO 84and APHO 889/30/2003byNAVFAC SWRWQCB11/24/2003DTSC09/24/2004Also known as SAIC 35, identifiedon a 1952 photograph. This trench likeanomaly is in the vicinity of APHO84. Both sites could have been relatedto maintenance activities of the roadway or adjacent culverts. No drainagechannels or trenches were noted during avisual inspection of the area in2003. RWQCB concurred with NFA in a letter dated 11/24/2003. DTSCconcurred with NFA in a letter dated 09/24/2004.APHO 88 PerimeterRoadTrench InformationPackage, APHO 84and APHO 889/30/2003byNAVFAC SWRWQCB11/24/2003DTSC09/24/2004Also known as SAIC 68, identifiedon a 1946 photograph. An unidentifiedobject or mound was noted on the north side of Perimeter Road about800 feet northwest of Bee Canyon. This mound is located near APHO 88(a shallow trench). Both sites could have been related to maintenanceactivities of the roadway or adjacent culverts. Groundwater monitoringwells for IRP Sites 18 and 24 are located near this APHO and it is abovethe Operable Unit 1 groundwater plume. This area was visually inspectedin 2003 and no evidence of a mound or other objects was noted. RWQCBconcurred with NFA in a letter dated 11/24/2003; DTSC concurred withNFA in a letter dated 09/24/2004.LEGAL_US_W # 74606800.137FOST #6Locations of ConcernLOC IDBuildingNumber/LocationDescriptionClosure ReportTitle/DateNFA LetterAgency/DateNotesAPHO 96 358 Unidentified Object,Stains, Wet Soil,ExcavationInformationPackage, APHO 964/19/2003byNAVFAC SWRWQCB08/14/2003DTSC10/22/2004Also known as SAIC 133, identified on a 1964 photograph. This area waslocated near a potable water pumping station and it is possible thatmaintenance activities at the pumpingstation released water onto the soil.Based on the former use of the area and the lack of other industrialactivities in the area, a declarationof no further action was recommended.RWQCB concurred with NFA in a letter dated 08/14/03; DTSC concurredwith NFA in a letter dated 10/22/2004.APHO 107 West ofFormer SludgeDrying BedsExcavation and FillAreaInformationPackage, APHO107 10/09/2003byNAVFAC SWRWQCB12/01/2003DTSC10/12/2004Also known as SAIC 246, identified on a 1973 photograph. The areanoted in the photograph is located near the Bee Canyon wash, (IRP Site25), near a former transformer storage area (SWMU 7), and west of IRPSite 12 (Sludge Drying Beds). RWQCB concurred with NFA in a letterdated 12/1/2003; however, DTSC concurred with NFA in a letter dated10/12/2004.APHO 112 672 Drum Storage InformationPackage, APHOs112 and 11406/16/2003byNAVFAC SWDTSC06/25/2003Also known as SAIC 305, identified on a 1975 photograph as possibledrums in open storage area. The location of the APHO is within theboundaries of IRP Site 24 (VOC Source Area). Two hazardous wasteareas (TAA 671 [SWMU 172] and TAA 672 [SWMU 117]) are near Facility672 and are under investigation as part of the RFA program. Based on aVSI conducted in June 2003, DTSC concurred with recommendation ofNFA. No further action is required.APHO 114 Drop TankDrainage AreaNo. 2Drum Storage InformationPackage, APHOs112 and 1146/16/2003 byNAVFAC SWandNFA Determinationfor APHOs (sitevisit by DTSC on6/13/2003)DTSC06/25/2003Also known as SAIC 348, identified on a 1976 photograph as possibledrums in open storage area. This site within the boundaries of IRP Site 7(Drop Tank Drainage Area Number 2) and IRP Site 24 (VOC SourceArea). Soil sampling was conducted for IRP Site 7 and a No FurtherAction declaration was granted for IRP Site 7 in 2001. Based on a VSIconducted in June 2003, DTSC concurred with NFA for APHO 114. Nofurther action is required.LEGAL_US_W # 74606800.138FOST #6Locations of ConcernLOC IDBuildingNumber/LocationDescriptionClosure ReportTitle/DateNFA LetterAgency/DateNotesRAD 242 242 Command AirMuseum Building.Historic aircraftequipped withradium paintedinstruments andother componentscontaining variousradioisotopes weredisplayed withinthis building.Final RadiologicalRelease Report,Buildings 242, 243,295, 319, 360, 787,832, and 1789March 2008byWeston SolutionsInc.CDHS05/10/2007Aircraft contained or were suspected of containing Radium-226 andpossibly other radio luminescent and heatresistant materials, such asStrontium-90, Krypton-85, and Thorium-232. The aircraft and associatedequipment have been removed. During the year 2000, a stationwide HRAwas conducted. The HRA recommended further radiological investigationfor Building 242 prior to final disposition. A confirmation radiologicalsurvey was completed in 2001 and 2004. The results were presented inthe Final Radiological Release Report dated March 2008. CDHSapproved unrestricted release of Building 242 in a letter dated05/10/2007.RAD 243 243 Command AirMuseum Building.Historic aircraftequipped withradium paintedinstruments andother componentscontaining variousradioisotopes weredisplayed withinthis building.Final RadiologicalRelease Report,Buildings 242, 243,295, 319, 360, 787,832, and 1789March 2008byWeston SolutionsInc.CDHS04/19/2007Aircraft contained or were suspected of containing Radium-226 andpossibly other radio luminescent and heatresistant materials, such asStrontium-90, Krypton-85, and Thorium-232. Aircraft artifacts containingradium, including radioactive dials, meters, and gauges, were displayedin showcases in Building 243 and were confirmed with radiation detectionequipment. The aircraft and associated equipment have been removed.During the year 2000, a stationwide HRA was conducted. The HRArecommended further radiological investigation for Building 243 prior tofinal disposition. A confirmation radiological survey was completed in2001 and 2004. The results were presented in the Final RadiologicalRelease Report dated March 2008. CDHSapproved unrestricted releaseof Building 243 in a letter dated 04/19/2007.RAD 244 244 Command AirMuseum Building.Historic aircraftequipped withradium paintedinstruments andother componentscontaining variousradioisotopes weredisplayed withinthis building. Theadjacent area wasused as a DRMOstorage yard.Final RadiologicalRelease Report,Buildings 242, 243,295, 319, 360, 787,832, and 1789March 2008byWeston SolutionsInc.DTSC02/14/2007Aircraft contained or were suspected of containing Radium-226 andpossibly other radio luminescent and heatresistant materials, such asStrontium-90, Krypton-85, and Thorium-232. The aircraft and associatedequipment have been removed. During the year 2000, a stationwide HRAwas conducted. The HRA recommended further radiological investigationfor Building 244 prior to final disposition. A confirmation radiologicalsurvey was completed in 2001 and 2004. The results were presented inthe Final Radiological ReleaseReport dated March 2008. DTSCapproved unrestricted release of Building 244 in a letter dated02/14/2007.LEGAL_US_W # 74606800.139FOST #6Locations of ConcernLOC IDBuildingNumber/LocationDescriptionClosure ReportTitle/DateNFA LetterAgency/DateNotesRAD 295 295 Building identifiedas a formermaintenancehangar whereaircraft utilizingradioactiveequipment waspreviously situated.Final RadiologicalRelease Report,Buildings 242, 243,295, 319, 360, 787,832, and 1789March 2008byWeston SolutionsInc.CDHS06/05/2007All radioactive components were removed from building in May 1999.During the year 2000, a stationwide HRA was conducted. The HRArecommended further radiological investigation for Building 295 prior tofinal disposition. A confirmation radiological survey was completed in2001 and 2004. The results were presented in the Final RadiologicalRelease Report dated March 2008. CDHSapproved unrestricted releaseof Building 295 in a letter dated 06/05/2007.Carve Out lll-B-2RFA 94 320 < 90-DayAccumulation PointSummary Report,SWMU 9409/02/1999byNAVFAC SWDTSC10/07/1999Site is situated within the investigation boundary of IRP Site 21. DTSCconcurred with NFA in a letter dated 10/7/1999. No further actionrequired.LEGAL_US_W # 74606800.140FOST #6Locations of ConcernLOC IDBuildingNumber/LocationDescriptionClosure ReportTitle/DateNFA LetterAgency/DateNotesRFA 253 317 Vehicle Wash Rack Final RCRA FacilityAssessment (RFA)Report July 1993by JEGandFinal Addendum toRFA ReportMay 1996 by BNIDTSC07/23/1996Inactive vehicle wash rack. NFA status identified in Final RFA Report(JEG, 1993) and regulatory concurrence obtained through acceptance ofJuly 1993 Final RFA Report. No further action required.Carve Out lll-ERAD 319 319 Building was usedfor several yearsfor inside storageof DRMO materials(governmentproperty) andequipment whileawaitingdisposition.Final RadiologicalRelease Report,Buildings 242, 243,295, 319, 360, 787,832, and 1789March 2008byWeston SolutionsInc.CDHS10/23/2006Building was restricted from receiving and/or storing equipment andcomponents containing radioactive materials. No official records or directknowledge of radiological materialsare available regarding radiologicalmaterials being handled by the El Toro DRMO; however, small quantitiesof general radioactive materials may have been stored here. During theyear 2000, a stationwide HRA was conducted. The HRA recommendedfurther radiological investigation for Building 319 prior to final disposition. Aconfirmation radiological survey was completed in 2001 and 2004. Theresults were presented in the Final Radiological Release Report datedMarch 2008. CDHS approved unrestricted release of Building 319 in aletter dated 10/23/2006.Carve Out lll-FAPHO 111 360 Wet Soil InformationPackage, APHO111 4/21/03byNAVFAC SWRWQCB 8/14/2003DTSC10/01/2004Identified on a 1975 photograph. The area noted in this APHO is includedwithin the boundaries of IRP Site 24 and adjacent to IRP Site 8, Unit 5(Old Salvage Yard). Due to the location of this APHO within theboundaries of IRP Site 24 and adjacent to IRP Site 8, Unit 5, no furtheraction was recommended for this APHO asall investigations and remedialactions taking place for VOC releases at IRP Site 24 will include theAPHO. RWQCB concurred with the recommendation of NFA in 2003 andDTSC concurred with NFA on 10/01/2004.LEGAL_US_W # 74606800.141FOST #6Locations of ConcernLOC IDBuildingNumber/LocationDescriptionClosure ReportTitle/DateNFA LetterAgency/DateNotesRAD 360 360 Building was usedfor several yearsfor inside storageof DRMO materials(governmentproperty) andequipment whileawaitingdisposition.Final RadiologicalRelease Report,Buildings 242, 243,295, 319, 360, 787,832, and 1789March 2008byWeston SolutionsInc.CDPH01/30/2008Building was restricted from receiving and/or storing equipment andcomponents containing radioactive materials. No official records or directknowledge of radiological materialsare available regarding radiologicalmaterials being handled by the El Toro DRMO; however, small quantitiesof general radioactive materials may have been stored here. During theyear 2000, a stationwide HRA was conducted. The HRA recommendedfurther radiological investigation for Building 360 prior to final disposition. Aconfirmation radiological survey was completed in 2001 and 2004. Theresults were presented in the Final Radiological Release Report datedMarch 2008. CDPH approved unrestricted release of Building 360 in aletter 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 Records by ECS in 2009.LEGAL_US_W # 74606800.142FOST #7: Locations of ConcernLEGAL_US_W # 74606800.143FOST #7Locations of ConcernLOC IDBuildingNumber/LocationDescriptionClosure ReportTitle/DateNFA LetterAgency/DateNotesCarve-Out lI-QTAA 658 658 < 90-dayAccumulationPointAddendum toClosure Report forTAA 65805/27/2003By ShawDTSC09/01/2004TAA 658 is also known as SWMU/AOC 171. Site assessment and soilsampling was completed in March 2003. An addendum to closure reportwas submitted on 05/27/2003 to DTSC and DTSC concurred with theNFA recommendation in a letter dated 09/01/2004.TAA 698 698 < 90-dayAccumulationPointClosure ReportTAA 69806/06/2003ByShawDTSC 09/28/2004TAA 698 is also known as SWMU/AOC 252. Soil sampling wascompleted in February 2003. A closure report was submitted on06/06/2003 to DTSC and DTSC concurred with the NFA recommendationin a letter dated 09/28/2004.TAA 779 779 < 90-dayAccumulationPointAddendum toClosure ReportTAA 77902/05/2003ByIT Corp.09/07/2004TAA 779 is also known as SWMU/AOC 227. Soil sampling wascompleted in December 2002. An addendum to closure report wassubmitted on 02/05/2003 to DTSC and DTSC concurred with the NFArecommendation in a letter dated 09/07/2004.APHO 25 Agua ChinonWashDisturbed Groundand ExcavationSummary Report,APHO 25,Mounded Material08/10/1999ByNAVFAC EFD SWDTSC08/31/1999U.S. EPA10/06/1999RWQCB03/31/2000APHO 25 is located near Agua Chinon Wash. Historical facility recordswere reviewed and a Summary Report recommending NFA wassubmitted in 1999. Regulatory concurrence on NFA has been obtained.LEGAL_US_W # 74606800.144Acronyms and AbbreviationsAOC = Area of Concern IRWD = Irvine Ranch Water District RCRA = Resource Conservation andRecovery ActAPHO = Aerial Photograph Anomaly IT = IT Corporation RI = Remedial InvestigationAST = aboveground storage tank JEG = Jacobs Engineering Group RFA = RCRA Facility AssessmentAVGAS = Aviation gasoline JP-5 = Jet Propulsion Fuel, Grade 5 RMA = RMA Land Construction Inc.BNI = Bechtel International, Inc. < =less than ROD = Record of DecisionBRAC = Base Realignment and Closure LOC = Locationof Concern RWQCB = Regional Water Quality ControlBoardCDPH = California Department of Public HealthLQ = Liquid SAIC = Science ApplicationsInternational CorporationCDHS = California Department of HealthServicesMCAS = Marine Corps Air Station SGU = Shallow Groundwater UnitCDM = Camp Dresser & McKee MSC = miscellaneous ST = StainCO = Carve Out NA = not applicable SVE = Soil Vapor ExtractionDHA = Department of Health ServicesNAVFAC SW = Naval Facilities EngineeringCommand, SouthwestSWMU = Solid Waste Management UnitDOJ = Department of Justice NFA = No FurtherAction TAA = Temporary Accumulation AreaDON = Department of the Navy OCHCA = Orange CountyHealth Care Agency TFA = Truck Fueling AreaDRMO = Defense Reutilization and MarketingOfficeOCWD = Orange County Water District Unk = UnknownDTSC = Department of Toxic SubstancesControlOHM = OHM Remediation Services Inc. UST = underground storage tankEBS = Environmental Baseline Survey OPS = Operating Properly and Successfully U.S. EPA = United States EnvironmentalProtection AgencyECP = Environmental Condition of Property OU =Operable Unit VSI = visual site inspectionEPA = Environmental Protection Agency OWS = oil/water separator VOC = volatile organic compoundEX = Excavation PCB = polychlorinated biphenylFA = Further Action ppm = Part per millionFOST = Finding of Suitability to Transfer PRG = preliminary remediation goalFS = Feasibility Study PRL = potential release locationGW = Groundwater RAD = radiologicalHRA = Historical Radiological Assessment RCRA = Resource Conservation andRecovery ActHHRA = Human Health Risk Assessment RI = Remedial InvestigationID = Identification RFA = RCRA Facility AssessmentIDP = Irvine Desalter Project RMA = RMA Land Construction Inc.IRP = Installation Restoration ProgramROD = Record of Decision