FIO - BorregoSprings_INPR_2014.pdf

REPLY TO

AITENTION OF:

Programs and Project Management Division

DEPARTMENT OF THE ARMY

LOS ANGELES DISTRICT, U.S. ARMY CORPS OF ENGINEERS

915 Wilshire Blvd, Suite 930 Los Angeles, CA, 90017-3401

March 1, 2014

MEMORANDUM FOR Commander, South Pacific Division, ATTN: CESPD-PDM (James Miller), 1455 Market Street, San Francisco, CA 94103-1398

SUBJECT: Defense Environmental Restoration Program - Formerly Used Defense Sites (DERP-FUDS) Revised Inventory Project Report (INPR) for Property No. J09CA7011, BORREGO SPRINGS, BORREGO SPRINGS, CA

1. This memorandum, including enclosures, comprises the revised INPR for the Military Munitions Response Program (MMRP) projects at the BORREGO SPRINGS. Enclosure 1 is the 2014 Revised Property Survey Summary Sheet. Enclosure 2 is the property map.

2. The Findings and Determination of Eligibility for this property was previously approved in 1995 and is included here as Enclosure 3. The property was determined to be eligible for inclusion into the FUDS Program. The MMRP project J09CA701101 is the subject of this revision.

3. This is primarily an administrative change to revise the former MMRP project into Munitions Response Area (MRA)/Munitions Response Site (MRS) definitions currently mandated by DoD. This revision is in accordance with the current USACE Handbook on Realignment, Delineation, and MRS Prioritization Protocol Implementation dated October 1, 2011, to realign the existing MMRP project into separate MMRP projects as identified in the MMRP 51 and accompanying MMRP Project Realignment and Delineation Form.

Two new MMRP projects and a revision to original MMRP Project 01 are proposed. Data for existing MMRP Projects 02 through 06 will also be updated based on conclusions and recommendations of recent CERCLA process reports. Enclosure 4 contains the Project Summary Sheets for the each existing and each proposed MMRP Project. Enclosure 5 is the completed MMRP Project Realignment and Delineation Form for your reference.

4. This revision does not change the basic footprint of the property or scope of the projects and was performed in accordance with the current USACE Handbook on Realignment, Delineation, and MRS Prioritization Protocol Implementation dated October 1, 2011. The state of California was part of the technical project planning team which developed and reviewed the findings of the various project site inspection reports which are the basis for the potential project revisions.

l1pmmama Text Box 200-1e J09CA701103_01.08_0543_a

5. I recommend that:

a. South Pacific Division approve the revised and new MMRP Projects.

b. South Pacific Division forward a copy of the approval memo and this revised INPR to the Environmental and Munitions Center of Expertise.

6. Please contact me directly if I can be of further assistance. Detailed information desired by your staff can be obtained by contacting Jeffery Armentrout, (213) 452-3990.

Digitally signed by

ARMENTROUT JEFF ARMENTROUT.JEFFERY.B.1231415730

• ON: c=US, a= U.S. Government, ou=DoD, ERY B 1231415730 ou=PKI,ou=USA,

• • cn=ARMENTROUT.JEFFERY.B.1231415730

Date: 2014.03.01 16:43:19 -QB'OO'

Debra A. Ford Chief, Military Branch

5 Ends

1. Revised Property Survey Summary Sheet

2. Property Map

3. FDE

4. Revised Project Summary Sheets

5. MMRP Project Realignment and Delineation Form

REVISED

PROPERTY SURVEY SUMMARY SHEET

FOR

DERP-FUDS PROPERTY NO. J09CA7011

BORREGO SPRINGS

BORREGO SPRINGS, SAN DIEGO and IMPERIAL Counties, CA

February 2014 (Revision Date)

PROPERTY NAME: Borrego Springs

LOCATION: Borrego Springs is located in San Diego and Imperial Counties, California.

The property is located in the vicinity of Latitude 33° 26' 58" North, Longitude 116° 16' 44" West, and is within California Congressional District 50, US Environmental Protection Agency Region IX and zip code 92004.

PROPERTY HISTORY: During the early 1940s the Army, Navy, and Marines acquired authorization to use six locations in the vicinity of Borrego Springs primarily for bombing targets and/or landing fields. The largest area of property acquired consisted of the Army's Borrego Maneuver Area. The Maneuver Area consisted of 400 square miles (256,000 acres) that were acquired from the State of California via a Use Permit dated March 10, 1942. This permit exempted three areas: portion of Township 9 South, Range 9 East, lying between U.S. Highway No. 99 and the Santa Rosa Mountains (this area is an Indian Reservation); Benson's Dry Lake lying north of Ocotillo (Naval landing field); and an area adjacent to western boundary on which houses, fences and other improvements were erected. Two of the Navy's properties were located within the Army's property and included: Borrego Military Wash and Clark's Dry Lake. No records were found that indicated the size of Borrego Military Wash or when the Department of the Navy acquired it. Clark's Dry Lake consisting of 640 acres and was acquired from private parties through a Declaration of Taking dated October 25, 1943. Two additional Navy areas included Benson Dry Lake (353.11 acres) and Borrego Hotel (160 acres) and were acquired from private parties. Benson Dry Lake consisted of four parcels. Two of the parcels, 160 acres and 85.21 acres were purchased by the Department of Defense (DOD) on November 19, 1940. The other two parcels, 80 acres and 27.90 acres were acquired through a Declaration of Taking (condemnation) on March 20, 1941. Borrego Hotel was acquired via Declaration of Taking, dated July 10, 1941. Finally, the Marines acquired an undefined amount of acreage (calculated 1920 acres) in the town of Borrego Springs known as Camp Ensign. In 1956, Borrego Springs was declared excess and portions were transferred to the state of California, San Diego County, and private owners. Current land use for the Borrego Springs is primarily commercial and private aviation, residential, and recreational (Anza-Borrego Desert State Park).

PROPERTY VISIT: There have been several property visits conducted on Borrego Springs by USACE personnel as well as by government contractors.

Enclosure 1

CATEGORY OF HAZARDS: MMRP

PROJECT DESCRIPTION:

Project 01: MMRP- Area C Firing Range. Project 01 was approved May 26, 199S. This existing project is revised in accordance with the current USACE Handbook on Realignment, Delineation, and MRS Prioritization Protocol Implementation dated October 1, 2011, the recommendations in the Final 51 Report dated September 2011, and according to the MMRP Project Realignment and Delineation Form dated June 1, 2013. As a result of the MMRP Realignment, Project 01 is now limited to the Munitions Response Site (MRS) identified as Area C Firing Range.

The S,98S-acre Area C Firing Range is located approximately 8 miles northeast of Borrego Springs in San Diego County, California. The Army used the range as an automatic weapons firing range between 1942 and 1944. Known or suspected munitions used include general small arms, large caliber projectiles, bombs, and ground and aerial rockets. The 51 field visit team observed no MEC but did find MD in the form of unidentifiable fragments, most likely from 90mm projectiles. One explosive, TNT, was detected in surface soil samples, and seven MC metals were detected above background concentrations, with one metal exceeding its ecological screening value.

Because ecological screening values are based on conservative assumptions, no risk to ecological receptors is anticipated as a result of exposure to MC at the MRS.

Project 02: MMRP- Camp Ensign/Dumpsite. Project 02 was approved May 26, 199S.

This existing project is realigned in accordance with the current USACE Handbook on Realignment, Delineation, and MRS Prioritization Protocol Implementation dated October 1, 2011, the recommendations in the Final 51 Report dated September 2011, and according to the MMRP Project Realignment and Delineation Form dated June 1, 2013.

The 1,918-acre Camp Ensign/Dumpsite is located in Borrego Springs, San Diego County, California. The Marines and the Army used the area as a headquarters and bivouac/cantonment area in support of training activities at Camp Ensign. Known or suspected munitions used include general small arms. The 51 field visit team observed no MEC but did find MD in the form of .SO caliber links and a .SO caliber projectile. Only small arms, which do not pose an explosive hazard, were used at this MRS. No explosives were detected in surface soil samples. Five MC metals were detected above background concentrations. None of these exceeded human health or ecological screening values.

Project 03: MMRP- Area E-1 Naval Impact Area. Project 03 was approved May 26, 199S. This existing project is realigned in accordance with the current USACE Handbook on Realignment, Delineation, and MRS Prioritization Protocol Implementation

Protocol dated October 1, 2011, the recommendations in the Final 51 Report dated September 2011, and according to the MMRP Project Realignment and Delineation Form dated June 1, 2013.

The 5,580-acre Area E-1 Naval Impact Area is located approximately six miles northeast of Borrego Springs, California, in San Diego County. The Army and the Navy used the area for practice bombing and other training between 1943 and 1955. Known or suspected munitions used include small arms ammunition, projectiles, bombs, aerial rockets, and military dynamite. The 51 field visit team observed no MEC but did find MD in the form of .30 caliber projectiles, .50 caliber links, cartridge cases and projectiles, 20mm link and projectiles, a 37mm fragment, a 90mm fragment, 3-lb. practice bomb debris, 4.5-lb. practice bomb debris, 100-lb. practice bomb debris, 250-lb. practice bomb debris, and spotting charge debris. No explosives were detected in surface soil samples. Six MC metals were detected above background concentrations, with three metals exceeding ecological screening values and one metal exceeding both human health and ecological screening values.

Project 04: MMRP- Borrego Hotel. Project 04 was approved May 26, 1995. This existing project is realigned in accordance with the current USACE Handbook on Realignment, Delineation, and MRS Prioritization Protocol Implementation dated October 1, 2011, the recommendations in the Final RI/FS Report dated May 2012, and according to the MMRP Project Realignment and Delineation Form dated June 1, 2013.

The 222-acre Borrego Hotel is located in San Diego County, California approximately 3.5 miles southeast of Ocotillo Wells. The area was used by the Navy for bombing and target strafing as well as an emergency landing area between 1941 and 1955. Known or suspected munitions used include medium caliber practice munitions, practice bombs and general small arms. RI intrusive investigations on the MRS uncovered MEC in the form of four practice bombs with unfired signal cartridges and MD from practice bombs, 20mm projectiles, and small arms ammunition. MD from practice bombs was also observed on the surface of the MRS. No explosives were detected in soil samples, and metal concentrations in field soil samples were not significantly different than background concentrations. Copper and lead were detected above background concentrations and ecological screening values in samples taken at a blow in place location. However, the elevated levels were believed to be from a source other than the BIP and concentrations are anticipated to decrease below ecological screening levels within a short time period.

Project 05: MMRP- Borrego Target #64. Project OS was approved May 26, 1995. This existing project is realigned in accordance with the current USACE Handbook on Realignment, Delineation, and MRS Prioritization Protocol Implementation dated October 1, 2011, the recommendation in the Final 51 Report dated September 2011, and according to the MMRP Project Realignment and Delineation Form dated June 1, 2013.

The 1,460-acre Borrego Target #64 MRS is located approximately 12 miles east southeast of Borrego Springs, California, in San Diego County. The Navy used the target for practice bombing, strafing, and rocketry between 1941 and 194S and between 1949 and 19S3. Known or suspected munitions used include small arms, bombs, medium and large caliber projectiles, rockets, flares, and hand grenades. The 51 field visit team observed no MEC but did find MD including .SO caliber links, cartridge cases, and projectiles; 20mm links, a cartridge case, and projectiles; 100-lb. practice bomb debris;

miniature practice bomb debris; 2.2S-inch rocket debris and igniters; a smoke grenade;

and unidentifiable fragments. Previous reports have documented the discovery and destruction of an Mk23 3-lb. practice bomb, three 100-lb. photoflash bombs, and two S inch rocket warheads on the MRS. No explosives were detected in surface soil samples.

Five MC metals were detected above background concentrations with three metals exceeding ecological screening values.

Project 06: MMRP- Bombing Target Benson. Project 06 was approved May 26, 199S.

This existing project is realigned in accordance with the current USACE Handbook on Realignment, Delineation, and MRS Prioritization Protocol Implementation dated October 1, 2011, the recommendation in the Final 51 Report dated September 2011, and according to the MMRP Project Realignment and Delineation Form dated June 1, 2013.

The 649-acre Bombing Target Benson is located in northeastern San Diego County, California just north of the town of Ocotillo Wells. The target was used by the Navy for horizontal, glide, and dive bombing exercises between 1940 and 1947. Known or suspected munitions used include small arms and practice bombs. The 51 field visit team observed no MEC but did find MD consisting of .SO caliber links, projectiles, and casings; 3-lb. practice bomb debris; 100-lb. practice bomb debris; and two M1A1 spotting charge caps. No explosives were detected in surface soil samples. Four MC metals were detected above background concentrations, with two MC metals exceeding ecological screening values. Given the conservative nature of ecological screening values no unacceptable risk to ecological receptors is expected as a result of exposure to MC at the MRS.

Project 07: MMRP - Area B Firing Range. The original MMRP project, Project 01, is revised in accordance with the current USACE Handbook on Realignment, Delineation, and MRS Prioritization Protocol Implementation dated October 1, 2011, the recommendations in the Final 51 Report dated September 2011, and according to the MMRP Project Realignment and Delineation Form dated June 1, 2013. As a result of the MMRP Realignment, Project 07 is added to address the Area B Firing Range.

The 4,4SO-acre Area B Firing Range is located approximately S miles southeast of Borrego Springs in San Diego County, California. The Army used the range as an automatic weapons firing range and rocket experimental test area between 1942 and

1944. Known or suspected munitions used include general small arms, practice bombs, rockets, and experimental munitions. The 51 field visit team observed no MEC but did find MD in the form of unknown fragments, 3.25-inch rocket debris, and 100-lb.

practice bomb debris. No explosives were detected in surface soil samples. Six MC metals were detected above background concentrations, but none exceeded human health screening values. One MC metal, zinc, exceeded its ecological screening value, but because ecological screening values are based on conservative assumptions, no risk to ecological receptors is anticipated as a result of exposure toMCat the MRS.

Project 08: MMRP- Artillery Impact Area. The original MMRP project, Project 01, is revised in accordance with the current USACE Handbook on Realignment, Delineation, and MRS Prioritization Protocol Implementation dated October 1, 2011, the recommendations in the Final 51 Report dated September 2011, and according to the MMRP Project Realignment and Delineation Form dated June 1, 2013. As a result of the MMRP Realignment, Project 08 is added to address the Artillery Impact Area.

The 25,937-acre Artillery Impact Area is located approximately 11 miles east-northeast of Borrego Springs in San Diego County, California. Army control of the project area included use as a mechanized artillery range between 1942 and 1944. Known or suspected munitions used include general small arms, large caliber projectiles, bombs, and ground and aerial rockets. The 51 field visit team observed no MEC but did find MD in the form of an M54 projectile fuze, a .50 caliber link, a .50 caliber projectile, and M91 40mm cartridges. A 1994 EOD Explosive Incident Report details the discovery and destruction of a 40mm Mk1 HE incendiary projectile on the MRS. No explosives were detected in surface soil samples. Six MC metals were detected above background concentrations, but none exceeded human health screening values. One MC metal, zinc, exceeded its ecological screening value, but because ecological screening values are based on conservative assumptions, no risk to ecological receptors is anticipated as a result of exposure toMCat the MRS.

AVAILABLE STUDIES AND REPORTS:

Final Site Inspection (51) Report Borrego Springs - Mechanized Artillery Range - September 2011 Final Site Inspection (51) Report Borrego Springs- Camp Ensign- September 2011 Final Site Inspection (51) Report Borrego Springs- Clark's Dry Lake- September 2011 Final Remedial Investigation/Feasibility Study (RI/FS) Former Borrego Maneuver Area Former Borrego Hotel- May 2012 Final Site Inspection (51) Report Borrego Springs - Military Wash - September 2011 Final Site Inspection (51) Report Benson/Ocotillo Dry Lake- September 2011

Reports and studies are available on the Project Information Retrieval System (PIRS) at https://fuds-pirs.usace.army.mil/app/indexjcfm; Engineering Knowledge Online (EKO) Virtual Teams at https://eko.usace.army.mil/virtualteams/mmrp; and the FUDS Records Management Database (FRMD) at https://frmd.usace.army.mil/fiip/app/index.cfm.

POINT OF CONTACT: Jeffery Armentrout, Los Angeles District, (213) 452-3990

LEAD REGULATOR: California Department of Toxic Substances Control, Daniel Cordero, (714) 484-5428

En clo su re llloj t

Legend

D APPROXIMATE PROPERTY BOUNDARY

BOMBING

MULTIPLE I COMBINED USE

l.!oo=

O sMALLARMS

PROJECT01

- PROJECT02

PROJECT03

- PROJECT04

- PROJECT05

- PROJECT06

- PROJECT07

PROJECT OS

MAP DATA UPDATED SUBSEQUENT TO PROJECTS 01

THRU 03,AND05AND 06 SITE INSPECTION REPORTS

SEPTEMBER 2011 , AND PROJECT 04 RifFS REPORT MAY2012.

0 18,750 37,500 l=====l:====:j Feet

U.S. A RM Y CORPS OF ENGINEERS

ST. LOUIS DISTRICT

BORREGO SPRINGS

FUDS PROPERTY NO. J09CA7011

BORREGO SPRINGS, CALIFORNIA

SAN DIEGO AND IMPERIAL COUNTIES

PROPERTY MAP

PAOJ. DA T!: ,eb 2014

Path: H:\OEW2013\Calibnia\Borreoo_Springs\Borrego_Springs_property.mxd

DEFENSE ENVIRONNEN'lAL RESTORATION PROGRAM FORMERLY USED DEFENSE SI'l'ES

FINDINGS AND DETEmaNA'l'lqH OF ELIGIBILift

BOJmEGO SPRINGS

BORREGO SPRINGS, CALIFORNIA

SI'l'E NO. J09CA701100

FI:NDINGS OF FAC'l'

1) During the early 1940s the Army, Navy, an~ Marines acquired authorization to use six locations in the vicinity of Borrego Springs as primarily bombing targets and/or landing fields. Not all the real estate information was available, but the research conducted indicates that the property was acquired as follows.

The largest area of property acquired consisted of the Army's Borrego Maneuver Area. The Maneuver Area consisted of 400 square miles (calculated 256,000 acres) that were acquired from the State of California via a Use Permit dated 10 March 1942. This permit exempted three areas: portion of Township 9 South, Range 9 East, lying between U.S. Highway No. 99 and the Santa Rosa Mountains (this area is an Indian Reservation); Benson's Dry Lake lying north of Ocotillo (Naval landing field); and area adjacent to western boundary on which houses, fences and other improvements have been erected. It is not clear if private properties were also exempted. Two of the Navy's properties were located within the Army's property and included: Borrego Military wash and Clark's Dry Lake. No records were found that indicated the size of Borrego Military Wash or when the Department of the Navy acquired it. Clark's Dry Lake consisting of 640 acres was acquired from private parties through a Declaration of Taking dated 25 October 1943. Two additional Navy areas included Benson Dry Lake (353.11 acres) and Borrego Hotel (160 acres) and were acquired from private parties. Benson Dry Lake consisted of four parcels. Two of the parcels, 160 acres (Marvin Ben Couch) and

85.21 acres (Elbert and Chesta Benson) were purchased by the Department of Defense (DOD) on 19 November 1940. The other two parcels, 80 acres {John Sheran et al) and 27.90 acres (Elaine L.

Wright et al) were acquired through a Declaration of Taking (condemnation) on 20 March 1941. Borrego Hotel was acquired from Elmo Rowland Livingston via Declaration of Taking, dated 10 July 1941. Finally, the Marines acquired an undefined amount of acreage (calculated 1920 acres) in the town of Borrego Springs known as camp Ensign.

2) The Department of the Army acquired 400 square miles for use in force-on-force maneuvers and anti-aircraft training for troops stationed in the San Diego area. However, records indicate that the Army's use of the area may have been less than originally planned for. Referenced improvements to the Maneuver Area primarily included roads. The Navy sites were pred~nantly used a3 -various bombing targets and emergency landing strips.

Emergency landing strips were inst~lled by the Navy at Benson Dry Lake and Clark's Dry Lake. Expected and or observed military improvements at the bombing targets include: remains of rake· stations, remains of mobil target tracks, and remains of targets.

The Marine site was reportedly used as a tent camp for trainees

Enclosure 3

Srr.E NO. J09~701100 fro~ the ~an Diego area. No references of permanent structures or ~mpro~ements were found for Camp Ensign.

3) nocdmentation detailing the Department of Defense (DOD) disposal !activities were not available for all the sites. The records .f.ound indicated that the majority of the properties were relinquished during the 1950s. The 400 square miles which constitut'ed the Maneuver Area were predominantly relinquished back to the State of California. Currently, the· State of .Californi~ owns this property as part of the Anz:a-Borrego Desert State .Pari~~:' The 640 acres which comprises Clark's Dry X.ake was transferr,ed to Bart J. Comer, through a Deed of Trust, on 21 Septembe~ 1956. The property was subsequently granted to the State of ~ryland for use as a radar telescope site. During the late 1980s the property was transferred to the State of Californi~ to be incorporated into Anza-Borrego State Park. The

353.11 acres which constituted Benson Dry Lake was relinquished to the CoUnty of San Diego for use as a municipal airport.

Disposal documents for Benson Dry Lake indicate that the property contained no improvements and was transferred to the county of San Diego on 17 August 1956. The 160 acres which comprised the former Borrego Hotel was declared excess and sold to Ray Formost on 6 September' 1956. The former site of Borrego Hotel is currently owned by multiple private parties but only one owner is identified on the records. Site specific real estate records were not available for Camp Ensign. However the real estate records indicate that the undefined amount of acreage (calculated 1920 acres) which constituted Camp Ensign were sold to private parties and have subsequently been subdivided and are owned by multiple private parties.

DE'!EltMINA'riON

Based on the foregoing Findings of Fact, the site has been determined to have been formerly used by the Department of Defense. It is therefore eligible for tne Defense Environmental Restoration Program - Formerly Used Defense Site established under 10 usc 2701 et seq. .

Date -uc..t1l C&!..

prBRUCE K. SCO'IT Brigadier General, U.S. Anny Commanding

Enclosure 3

REVISED PROJECT SUMMARY SHEET

FOR

DERP-FUDS MMRP PROJECT NO. J09CA701101

Property No. J09CA7011

Federal Facility ID Number: CA9799F7743 Area C Firing Range

BORREGO SPRINGS

San Diego County, CA February 2014 (Revision Date)

PROJECT DESCRIPTION: This MMRP project is revised in accordance with the current USACE Handbook on Realignment, Delineation, and MRS Prioritization Protocol Implementation dated October 1, 2011, the recommendations in the Final 51 Report dated September 2011, and according to the MMRP Project Realignment and Delineation Form dated June 1, 2013. As a result of the MMRP Realignment, Project 01 is now limited to the Munitions Response Site (MRS) identified as Area C Firing Range.

Although the description of this project is now limited to a specific geographic area, the integrity of the original MMRP project scope will be maintained by the combination of all MMRP project scopes.

The 5,985-acre Area C Firing Range is located approximately 8 miles northeast of Borrego Springs in San Diego County, California. The Army used the range as an automatic weapons firing range between 1942 and 1944. Known or suspected munitions used at the MRS include general small arms (.30 and .50 caliber); 40mm cartridges (Mkll HE-T,SD and M91 TP-T); 90mm cartridges (M71A1 HE-T); 3-lb.

miniature practice bombs (AN-MkS and AN-Mk23); 4.5-lb. miniature practice bombs (AN-Mk43); 100-lb. practice bombs (Mk15 series and M38A2); 100-lb. photoflash bombs (M46); 250-lb. general purpose bombs (AN-M57); 2.2.5-inch rockets (Mk4 and Mk6 SCAR); 3.25-inch rockets (Mk1 through Mk4 target); 5-inch rockets (Mk1 HE, MkS HE HVAR, MkS practice HVAR). The land comprising the MRS is owned by the State of California and private owners and is used for residential and recreational purposes.

The 51 field visit team conducted approximately 14.4 miles of qualitative reconnaissance on the MRS. They observed no MEC but did find MD in the form of unidentifiable fragments, most likely from 90mm projectiles. One explosive, TNT, was detected in surface soil samples, and seven MC metals were detected above background concentrations. Of these, none exceeded human health screening values and only zinc exceeded its ecological screening value. However, because ecological screening values are based on conservative assumptions, no risk to ecological receptors is anticipated as a result of exposure toMCat the MRS.

PROJECT ELIGIBILITY: Property was under the jurisdiction of the Secretary and owned by, leased to, or otherwise possessed by the United States at the time of actions

Enclosure 4 leading to contamination by hazardous substances. The property was transferred from DoD's control prior to 17 October 1986. The DoD is the only entity known to have conducted military activity on the MRS.

POLICY CONSIDERATIONS: This project is being revised to be consistent with the current USACE Handbook on Realignment, Delineation, and MRS Prioritization Protocol Implementation dated October 1, 2011.

PROPOSED ACTIVITIES: Per the Final 51 Report, further investigation for MEC is warranted. No further investigation for MC is warranted.

POINT OF CONTACT: Jeffery Armentrout, Los Angeles District, (213) 452-3990

LEAD REGULATOR: California Department of Toxic Substances Control, Daniel su

. · ~.~·~·~ti

Source Esn, D~gtlaiGic:i)e, GeoEye, f-tubed, USDA, USGS AEX, Getmapptng, Aerognd. IGN, IGP.

and the GIS User Community

Legend

X CENTROID

UTM ZONE 11 (NAD83)

568009.2m E 3893054.9m N 33" 22' 29" N 116" 16'07"W

APPROXIMATE MRS BOUNDARY

ACREAGE = 5985 Ac

D APPROXIMATE PROPERTY BOUNDARY

i'oj t

MAP DATA UPDATED SUBSEQUENT TO SITE

INSPECTION REPORT. SEPTEMBER 2011

mJ

0 3,000 6,000

E========I======~ Feet

U. S . ARMY CORPS OF ENGINEERS

ST. LOUIS DISTRICT

BORREGO SPRINGS

FUDS PROJECT NO. J09CA701101

MUNITIONS RESPONSE MAP

AREA C FIRING RANGE

PROJ. OATe:Mrt2013

01 / OlROl

Path : H:\OEW2013\Catifornia\Bctrego_Springs\Borrego_Springs_prqeci_01.mxd

DERP-FUDS MMRP PROJECT NO.J09CA701102

Property No.J09CA7011

Federal Facility ID Number: CA9799F7743 Camp Ensign/Dumpsite

BORREGO SPRINGS

San Diego County, CA

February 2014 (Revision Date)

PROJECT DESCRIPTION: This MMRP project is realigned in accordance with the current USACE Handbook on Realignment, Delineation, and MRS Prioritization Protocol Implementation dated October 1, 2011, the recommendations in the Final 51 Report dated September 2011, and according to the MMRP Project Realignment and Delineation Form dated June 1, 2013.

The 1,920-acre Camp Ensign/Dumpsite MRS is located in Borrego Springs, San Diego County, California. The Marines and the Army used the area as a headquarters and bivouac/cantonment area in support of training activities at Camp Ensign. Known or suspected munitions used at the MRS include general small arms (.22, .30, .4S and .SO caliber cartridges). The land comprising the MRS is privately owned and is used for residential and recreational purposes.

The 51 field visit team conducted approximately 13.1 miles of qualitative reconnaissance on the MRS. They observed no MEC but did find MD in the form of .SO caliber links and a .SO caliber projectile. Only small arms, which do not pose an explosive hazard, were used at this MRS. No explosives were detected in surface soil samples. Five MC metals were detected above background concentrations. None of these exceeded human health or ecological screening values. No unacceptable threat to human health or ecological receptors is expected as a result of exposure to MC at the MRS.

PROJECT ELIGIBILITY: Property was under the jurisdiction of the Secretary and owned by, leased to, or otherwise possessed by the United States at the time of actions leading to contamination by hazardous substances. The property was transferred from DoD's control prior to 17 October 1986. The DoD is the only entity known to have conducted military activity on the MRS.

POLICY CONSIDERATIONS: This project is being realigned to be consistent with the current USACE Handbook on Realignment, Delineation, and MRS Prioritization Protocol Implementation dated October 1, 2011.

PROPOSED ACTIVITIES: Per the Final 51 Report, no further investigation for MEC or MC is warranted. The project was NDAI'd September 21, 2011 and Project Closeout was achieved September 30, 2011.

POINT OF CONTACT: Jeffery Armentrout, Los Angeles District, (213) 452-3990

LEAD REGULATOR: California Department of Toxic Substances Control, Daniel su n·

Legend

X CENTROID

UTM ZONE 11 (NAD83)

559936.7m E 3677550.7m N 33" 14' 07" N 116" 21'24" W

APPROXIMATE MRS BOUNDARY

ACREAGE= 1920 Ac

D APPROXIMATE PROPERTY BOUNDARY

i'oj t

MAP DATA UPDATED SUBSEQUENT TO SITE

INSPECTION REPORT, SEPTEMBER 2011

mJ

0 2,000 4,000

E========I======~ Feet

U.S. ARM Y CORPS OF ENGINEERS

ST. LOUIS DISTRICT

BORREGO SPRINGS

FUDS PROJECT NO. J09CA701102

MUNITIONS RESPONSE MAP

CAMP ENSIGN/DUMPSITE

PROJ. OATe: Feb 201ol

02 / 02R01 Path: H :\OEW20 13\California\Borrego_ Spring s\Borrego_ Springs _prcjecl_ 02 .mxd

DERP-FUDS MMRP PROJECT NO. J09CA701103

Property No. J09CA7011

Federal Facility ID Number: CA9799F7743 Area E-1 Naval Impact Area

BORREGO SPRINGS

San Diego County, CA

February 2014 (Revision Date)

PROJECT DESCRIPTION: This MMRP project is realigned in accordance with the current USACE Handbook on Realignment, Delineation, and MRS Prioritization Protocol Implementation dated October 1, 2011, the recommendations in the Final SI Report dated September 2011, and according to the MMRP Project Realignment and Delineation Form dated June 1, 2013.

The 5,580-acre Area E-1 Naval Impact Area MRS is located approximately six miles northeast of Borrego Springs, California, in San Diego County. The Army and the Navy used the area for practice bombing and other training between 1943 and 1955. Known or suspected munitions used at the MRS include small arms ammunition (.30 and .50 caliber); 20mm projectiles (Mki ball, M95 AP-T, M21A1, and M99 TP); 37mm projectiles (M63 Mod I TP); 90mm projectiles (M71A1 HE-T); 3-lb. miniature practice bombs (AN MkS and AN-Mk23); 4.5-lb. miniature practice bombs (AN-Mk43); 100-lb. practice bombs (M38A2 and Mk15 Mod 3); 100-lb. photoflash bombs (M46); 250-lb. practice bombs (Mk86); 250-lb. general purpose bombs (AN-M57); 2.25-inch rockets (Mk1, Mk2, Mk3, Mk4 and Mk6 SCAR); 5-inch rockets (Mk10 Mod 6, Mk25 HEAT); and military dynamite. The land comprising the MRS is owned by the State of California and private owners and is used for recreational activities.

The SI field visit team conducted approximately 22.5 miles of qualitative reconnaissance on the MRS. They observed no MEC but did find MD in the form of .30 caliber projectiles, .50 caliber links, cartridge cases and projectiles, 20mm link and projectiles, a 37mm fragment, a 90mm fragment, 3-lb. practice bomb debris, 4.5-lb. practice bomb debris, 100-lb. practice bomb debris, 250-lb. practice bomb debris, and spotting charge debris. No explosives were detected in surface soil samples. Six MC metals were detected above background concentrations. Of these, barium, copper and zinc exceeded their ecological screening values and lead exceeded its ecological and human health screening values. An unacceptable risk to human health and ecological receptors is possible as a result of exposure to MC at the MRS.

PROJECT ELIGIBILITY: Property was under the jurisdiction of the Secretary and owned by, leased to, or otherwise possessed by the United States at the time of actions leading to contamination by hazardous substances. The property was transferred from

DoD's control prior to 17 October 1986. The DoD is the only entity known to have conducted military activity on the MRS.

POLICY CONSIDERATIONS: This project is being realigned to be consistent with the current USACE Handbook on Realignment, Delineation, and MRS Prioritization Protocol Implementation dated October 1, 2011.

PROPOSED ACTIVITIES: Per the Final 51 Report, further investigation for both MEC and MC is warranted.

POINT OF CONTACT: Jeffery Armentrout, Los Angeles District, (213) 452-3990

LEAD REGULATOR: California Department of Toxic Substances Control, Daniel su

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Legend

X CENTROID

UTM ZONE 11 (NAD83)

567773.3m E 3888734.6m N 33" 20' 08" N 116" 16' 18" W

APPROXIMATE MRS BOUNDARY

ACREAGE = 5580 Ac

D APPROXIMATE PROPERTY BOUNDARY

i'oj t

MAP DATA UPDATED SUBSEQUENT TO SITE

INSPECTION REPORT. SEPTEMBER 2011

0 2,000 4,000

E========I======~ Feet mJ U.S. ARMY CORPS OF ENGINEERS

ST. LOUIS DISTRICT

BORREGO SPRINGS

FUDS PROJECT NO. J09CA701103

MUNITIONS RESPONSE MAP

AREA E-1 NAVAL IMPACT AREA

PROJ. OATf: Mf1120t3

03 / 03R01 Path: H :\OEW20 13\California\Bctrego_ Spring s\Borrego_ Springs _project_ 03.mxd

DERP-FUDS MMRP PROJECT NO. J09CA701104

Property No.J09CA7011

Federal Facility ID Number: CA9799F7743 Borrego Hotel

BORREGO SPRINGS

San Diego County, CA

February 2014 (Revision Date)

PROJECT DESCRIPTION: This MMRP project is realigned in accordance with the current USACE Handbook on Realignment, Delineation, and MRS Prioritization Protocol Implementation dated October 1, 2011, the recommendations in the Final RI/FS Report dated May 2012, and according to the MMRP Project Realignment and Delineation Form dated June 1, 2013.

The 222-acre Borrego Hotel MRS is located in San Diego County, California approximately 3.5 miles southeast of Ocotillo Wells. The area was used by the Navy for bombing and target strafing as well as an emergency landing area between 1941 and 1955. Known or suspected munitions used at the MRS include 3-lb. to 4.5-lb. practice bombs (AN-Mk5, Mk23, and Mk43 with Signal, AN-Mk4), 100-lb. practice bombs (M15 and M38A2), and 500-lb. (Mk65) practice bombs, 20mm (M95, AP-T) projectiles, associated spotting charges and general small arms. The land comprising the MRS is privately owned and is used for residential and recreational activities.

RI intrusive investigations on the MRS uncovered MEC in the form of four practice bombs with unfired signal cartridges and MD from practice bombs, 20mm projectiles, and small arms ammunition. MD from practice bombs was also observed on the surface of the MRS. No explosives were detected in soil samples, and metal concentrations in field soil samples were not significantly different than background concentrations.

Copper and lead were detected above background concentrations and ecological screening values in samples taken at a blow in place location. However, the elevated levels were believed to be from a source other than the BIP and concentrations are anticipated to decrease below ecological screening levels within a short time period.

Therefore, no unacceptable risk to human health or ecological receptors is expected as a result of exposure toMCat the MRS.

PROJECT ELIGIBILITY: Property was under the jurisdiction of the Secretary and owned by, leased to, or otherwise possessed by the United States at the time of actions leading to contamination by hazardous substances. The property was transferred from DoD•s control prior to 17 October 1986. The DoD is the only entity known to have

POLICY CONSIDERATIONS: This project is being realigned to be consistent with the current USACE Handbook on Realignment, Delineation, and MRS Prioritization Protocol Implementation dated October 1, 2011.

PROPOSED ACTIVITIES: Per the Final RI/FS Report, additional actions for MEC are warranted to protect against unacceptable risk. No further actions for MC are warranted.

POINT OF CONTACT: Jeffery Armentrout, Los Angeles District, (213) 452-3990

LEAD REGULATOR: California Department of Toxic Substances Control, Daniel su

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Legend

X CENTROID

UTM ZONE 11 (NAD83)

583839.3m E 3861828.0m N 33" 05' 31" N 116" 06'06" W

- APPROXIMATE MRS BOUNDARY

ACREAGE = 222 Ac

D APPROXIMATE PROPERTY BOUNDARY

i'oj t

MAP DATA UPDATED SUBSEQUENT TO

RVFS REPORT, MAY 2012

0 1,000 2,000

E========I======~ Feet mJ U.S. ARMY CORPS OF ENGINEERS

ST. LOUIS DISTRICT

BORREGO SPRINGS

FUDS PROJECT NO. J09CA701104

MUNITIONS RESPONSE MAP

BORREGO HOTEL

PROJ. OATe: Feb 201ol

04 / 04R01 Path: H :\OEW20 13\California\Borrego_ Spring s\Borrego_ Springs _prcjecl_ 04 .mxd

DERP-FUDS MMRP PROJECT NO. J09CA701105

Property No.J09CA7011

Federal Facility ID Number: CA9799F7743 Borrego Target #64

BORREGO SPRINGS

San Diego County, CA February 2014 (Revision Date)

PROJECT DESCRIPTION: This MMRP project is realigned in accordance with the current USACE Handbook on Realignment, Delineation, and MRS Prioritization Protocol Implementation dated October 1, 2011, the recommendation in the Final 51 Report dated September 2011, and according to the MMRP Project Realignment and Delineation Form dated June 1, 2013.

The 1,460-acre Borrego Target #64 MRS is located approximately 12 miles east southeast of Borrego Springs, California, in San Diego County. The Navy used the target for practice bombing, strafing, and rocketry between 1941 and 1945 and between 1949 and 1953. Known or suspected munitions used at the MRS include small arms ammunition (.50 caliber cartridges); 20mm cartridges (Mk1 ball, M95 AP-T and M99 TP); 40mm projectiles (Mkll HEI-T, SD); 90mm projectiles (M71A1 HE-T); 3-lb.

miniature practice bombs (AN-MkS and An-Mk23); 4.5-lb. miniature practice bombs (AN-Mk43); 100-lb. practice bombs (M38A2 and Mk15 Mod 3); 100-lb. photoflash bombs (M46); 250-lb. practice bombs (Mk86); aircraft parachute flares (M8 and M9);

2.25-inch rockets (Mk1, Mk2, Mk3, Mk 4 and Mk 6 SCAR); 5-inch rockets (HVAR and HEAT); and smoke hand grenades (M15 WP). The land comprising the MRS is owned by the State of California and is used for recreational purposes.

The 51 field visit team conducted approximately 9.4 miles of qualitative reconnaissance on the MRS. They observed no MEC but did find MD including .50 caliber links, cartridge cases, and projectiles; 20mm links, a cartridge case, and projectiles; 100-lb. practice bomb debris; miniature practice bomb debris; 2.25-inch rocket debris and igniters; a smoke grenade; and unidentifiable fragments. Previous reports have documented the discovery and destruction of an Mk23 3-lb. practice bomb, three 100-lb. photoflash bombs, and two 5-inch rocket warheads on the MRS. No explosives were detected in surface soil samples. Five MC metals were detected above background concentrations.

Lead was detected above its California human health screening level but not above its regional screening level; therefore an unacceptable risk to human health as a result of exposure to lead is possible but not likely. Copper, lead, and zinc were detected above ecological screening values and an unacceptable risk to ecological receptors is possible as a result of exposure to MC at the MRS.

PROJECT ELIGIBILITY: Property was under the jurisdiction of the Secretary and leading to contamination by hazardous substances. The property was transferred from DoD's control prior to 17 October 1986. The DoD is the only entity known to have conducted military activity on the MRS.

POLICY CONSIDERATIONS: This project is being realigned to be consistent with the current USACE Handbook on Realignment, Delineation, and MRS Prioritization Protocol Implementation dated October 1, 2011.

PROPOSED ACTIVITIES: Per the Final 51 Report, further investigation for both MEC and MC is warranted.

POINT OF CONTACT: Jeffery Armentrout, Los Angeles District, (213) 452-3990

LEAD REGULATOR: California Department of Toxic Substances Control, Daniel su

X

Legend

X CENTROID

UTM ZONE 11 (NAD83)

578786.4m E 3674006.2m N 33" 12' 07" N 116" 09' 17"W

APPROXIMATE MRS BOUNDARY

ACREAGE= 1460 Ac

D APPROXIMATE PROPERTY BOUNDARY

i'oj t

MAP DATA UPDATED SUBSEQUENT TO SITE

INSPECTION REPORT. SEPTEMBER 2011

0 2,000 4,000

E========I======~ Feet mJ U.S. ARMY CORPS OF ENGINEERS

ST. LOUIS DISTRICT

BORREGO SPRINGS

FUDS PROJECT NO. J09CA701105

MUNITIONS RESPONSE MAP

BORREGO TARGET #64

PROJ. OATe: Feb 201ol

05 / OSROl Path: H :\OEW20 13\California\Borrego_ Spring s\Borrego_ Springs _prcjecl_ 05.mxd

DERP-FUDS MMRP PROJECT NO.J09CA701106

Property No.J09CA7011

Federal Facility ID Number: CA9799F7743 Bombing Target Benson

BORREGO SPRINGS

San Diego County, CA

February 2014 (Revision Date)

PROJECT DESCRIPTION: This MMRP project is realigned in accordance with the current USACE Handbook on Realignment, Delineation, and MRS Prioritization Protocol Implementation dated October 1, 2011, the recommendation in the Final 51 Report dated September 2011, and according to the MMRP Project Realignment and Delineation Form dated June 1, 2013.

The 649-acre Bombing Target Benson MRS is located in northeastern San Diego County, California, just north of the town of Ocotillo Wells. The MRS was used by the Navy for horizontal, glide, and dive bombing exercises between 1940 and 1947. Known or suspected munitions used at the MRS include small arms (.50 caliber cartridges); 3-

lb. miniature practice bombs (AN-MkS, AN-Mk23); 4.5-lb. miniature practice bombs (AN-Mk43); and 100-lb. practice bombs (Mk15 Mods 1 through 4 and M38A2). The land comprising the MRS is owned by the County of San Diego, the State of California, and private owners and is used as the Ocotillo Wells Municipal Airport and for residential and recreational purposes.

The 51 field visit team conducted approximately 6.3 miles of qualitative reconnaissance on the MRS. They observed no MEC but did find MD consisting of .SO caliber links, projectiles, and casings; 3-lb. practice bomb debris; 100-lb. practice bomb debris; and two M1A1 spotting charge caps. No explosives were detected in surface soil samples.

Four MC metals were detected above background concentrations. None were detected above human health screening values. Two metals, lead and zinc, were detected above their ecological screening values, but given the conservative nature of ecological screening values no unacceptable risk to ecological receptors is expected as a result of exposure toMCat the MRS.

PROJECT ELIGIBILITY: Property was under the jurisdiction of the Secretary and owned by, leased to, or otherwise possessed by the United States at the time of actions leading to contamination by hazardous substances. The property was transferred from DoD's control prior to 17 October 1986. The DoD is the only entity known to have

POLICY CONSIDERATIONS: This project is being realigned to be consistent with the

Implementation dated October 1, 2011.

PROPOSED ACTIVITIES: Per the Final 51 Report, further investigation for MEC is warranted. No further investigation for MC is warranted.

POINT OF CONTACT: Jeffery Armentrout, Los Angeles District, (213) 452-3990

LEAD REGULATOR: California Department of Toxic Substances Control, Daniel su

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and the GIS User Communtty

Legend

X CENTROID

UTM ZONE 11 (NAD83)

580589.3m E 3868370.8m N 33" 09' 04" N 116" 08'09" W

- APPROXIMATE MRS BOUNDARY

ACREAGE = 649 Ac

D APPROXIMATE PROPERTY BOUNDARY

i'oj t

MAP DATA UPDATED SUBSEQUENT TO SITE

INSPECTION REPORT. SEPTEMBER 2011

mJ

0 2,000 4,000

E========I======~ Feet

U.S. ARMY CORPS OF ENGINEERS

ST. LOUIS DISTRICT

BORREGO SPRINGS

FUDS PROJECT NO. J09CA701106

MUNITIONS RESPONSE MAP

BOMBING TARGET BENSON

PROJ. OATf : Mf1120t3

06 / 06R01 Path: H :\OEW20 13\California\Bctrego_ Spring s\Borrego_ Springs _project_ 06.mxd

DERP-FUDS MMRP PROJECT NO. J09CA701107

Property No. J09CA7011

Federal Facility ID Number: CA9799F7743 Area B Firing Range

BORREGO SPRINGS

San Diego County, CA February 2014 (Revision Date)

PROJECT DESCRIPTION: The original MMRP project, Project 01, is revised in accordance with the current USACE Handbook on Realignment, Delineation, and MRS Prioritization Protocol Implementation dated October 1, 2011, the recommendations in the Final 51 Report dated September 2011, and according to the MMRP Project Realignment and Delineation Form dated June 1, 2013. As a result of the MMRP Realignment, Project 07 is added to address the Area B Firing Range. Although the description of this project is now limited to a specific geographic area, the integrity of the original MMRP project scope will be maintained by the combination of all MMRP project scopes.

The 4,450-acre Area B Firing Range is located approximately 5 miles southeast of Borrego Springs in San Diego County, California. The Army used the range as an automatic weapons firing range and rocket experimental test area between 1942 and 1944. Known or suspected munitions used at the MRS include general small arms (.30 and .50 caliber); 100-lb. practice bombs (M38A2); 3.25-inch rockets (Mk1 through Mk4 target); and experimental munitions. The land comprising the MRS is owned by the State of California and private owners and is used for recreational purposes.

The 51 field visit team conducted approximately 10.4 miles of qualitative reconnaissance on the MRS. They observed no MEC but did find MD in the form of unknown fragments, 3.25-inch rocket debris, and 100-lb. practice bomb debris. No explosives were detected in surface soil samples. Six MC metals were detected above background concentrations, but none exceeded human health screening values. One MC metal, zinc, exceeded its ecological screening value, but because ecological screening values are based on conservative assumptions, no risk to ecological receptors is anticipated as a result of exposure to MC at the MRS.

PROJECT ELIGIBILITY: Property was under the jurisdiction of the Secretary and owned by, leased to, or otherwise possessed by the United States at the time of actions leading to contamination by hazardous substances. The property was transferred from DoD's control prior to 17 October 1986. The DoD is the only entity known to have

POLICY CONSIDERATIONS: This project is being created to be consistent with the

Implementation dated October 1, 2011.

PROPOSED ACTIVITIES: Per the Final 51 Report, further investigation for MEC is warranted. No further investigation for MC is warranted.

POINT OF CONTACT: Jeffery Armentrout, Los Angeles District, (213) 452-3990

LEAD REGULATOR: California Department of Toxic Substances Control, Daniel su

~'rte' Esn,·D~grtaiGIOOe GeoEye, .. cubed. USDA, USGS AEX, G.etmapprng, Ae_~nd IGN, JGP.

antlt~e GIS User Community

Legend

X CENTROID

UTM ZONE 11 (NAD83)

569697.4m E 3875886.6m N 33• 13' 11" N

116. 15'07"W

- APPROXIMATE MRS BOUNDARY

ACREAGE = 4450 Ac

D APPROXIMATE PROPERTY BOUNDARY

i'oj t

MAP DATA UPDATED SUBSEQUENT TO SITE

INSPECTION REPORT. SEPTEMBER 2011

mJ

0 2,000 4,000

E========I======~ Feet

U.S. ARM Y CORPS OF ENGINEERS

ST. LOUIS DISTRICT

BORREGO SPRINGS

FUDS PROJECT NO. J09CA701107

MUNITIONS RESPONSE MAP

AREA B FIRING RANGE

PROJ.OATe:Mrt2013

07 / 01R02 Path: H:\OEW2013\California\Bctrego_Springs\Borrego_Springs_prqect_07.mxd

DERP-FUDS MMRP PROJECT NO. J09CA701108

Property No.J09CA7011

Federal Facility ID Number: CA9799F7743 Artillery Impact Area

BORREGO SPRINGS

San Diego County, CA February 2014 (Revision Date)

PROJECT DESCRIPTION: The original MMRP project, Project 01, is revised in accordance with the current USACE Handbook on Realignment, Delineation, and MRS Prioritization Protocol Implementation dated October 1, 2011, the recommendations in the Final SI Report dated September 2011, and according to the MMRP Project Realignment and Delineation Form dated June 1, 2013. As a result of the MMRP Realignment, Project 08 is added to address the Artillery Impact Area. Although the description of this project is now limited to a specific geographic area, the integrity of the original MMRP project scope will be maintained by the combination of all MMRP project scopes.

The 2S,937-acre Artillery Impact Area is located approximately 11 miles east-northeast of Borrego Springs in San Diego County, California. Army control of the MRS included use as a mechanized artillery range between 1942 and 1944. Known or suspected munitions used at the MRS include general small arms (.30 and .SO caliber); 40mm cartridges (Mkll HE-T, SD and M91 TP-T); 90mm cartridges (M71A1 HE-T); 3-lb.

miniature practice bombs (AN-MkS and AN-Mk23); 4.S-Ib. miniature practice bombs (AN-Mk43); 100-lb. practice bombs (Mk1S series and M38A2); 100-lb. photoflash bombs (M46); 2SO-Ib.