Document ID: EPA-R03-SFUND-2010-0436-0011
Agency: epa
Document Type: Supporting & Related Material
Title: 
Posted Date: 2010-07-23T04:00Z

ENVIRONMENTAL PROTECTION AGENCY

40 CFR Part 300

[EPA-R03-SFUND-2010-0436; FRL -     ]

National Oil and Hazardous Substances Pollution Contingency Plan;

National Priorities List:  Partial Deletion of the Letterkenny Army
Depot Southeastern (SE) Area and Letterkenny Army Depot Property
Disposal Office (PDO) Area Superfund Sites

AGENCY: Environmental Protection Agency. 

ACTION: Direct final rule.

SUMMARY: The Environmental Protection Agency (EPA) Region III is
publishing a direct final Notice of Deletion of portions of the
Letterkenny Army Depot Southeastern (SE) Area and Letterkenny Army Depot
Property Disposal Office (PDO) Area (Sites), located in Chambersburg,
PA, from the National Priorities List (NPL).  The NPL, promulgated
pursuant to section 105 of the Comprehensive Environmental Response,
Compensation, and Liability Act (CERCLA) of 1980, as amended, is an
appendix of the National Oil and Hazardous Substances Pollution
Contingency Plan (NCP).  This direct final partial deletion is being
published by EPA with the concurrence of the Commonwealth of
Pennsylvania, through the Pennsylvania Department of Environmental
Protection (PADEP), because EPA has determined that all appropriate
response actions at these identified parcels under CERCLA, other than
operation, maintenance, and five-year reviews, have been completed. 
However, this partial deletion does not preclude future actions under
Superfund.

	This partial deletion pertains to the soil and groundwater of parcels
24, 27, 28, 2-53, 2-53L, 2-54, 2-54L, 2-70, 2-70L, 3-89, 3-90, and 3-91.
 All other parcels within the site boundaries of Letterkenny Army Depot
SE and PDO Areas will remain on the NPL and are not being considered for
deletion as part of this action. 

DATES: This direct final partial deletion is effective [insert date 60
days from the date of publication in the Federal Register] unless EPA
receives adverse comments by [insert date 30 days from date of
publication in the Federal Register]. If adverse comments are received,
EPA will publish a timely withdrawal of the direct final partial
deletion in the Federal Register informing the public that the partial
deletion will not take effect.

ADDRESSES: 

Submit your comments, identified by Docket ID no.
EPA-R03-SFUND-2010-0436, by one of the following methods:

  HYPERLINK "http://www.regulations.gov"  http://www.regulations.gov . 
Follow on-line instructions for submitting comments.

Email:   hoover.gerald@epa.gov

Fax:      (215) 814-3025, Attn: Gerald Hoover

Mail or Hand Delivery to:    

U.S. Environmental Protection Agency, Region III

Attn: Gerald Hoover (3HS11)

1650 Arch Street

Philadelphia, PA 19103-2029

		Phone:  (215) 814-2077

Business Hours:  Mon. thru Fri. - 9:00 am to 4:00 pm

Instructions:  Direct your comments to Docket ID no.
EPA-R03-SFUND-2010-0436.  EPA’s policy is that all comments received
will be included in the public docket without change and may be made
available online at   HYPERLINK "http://www.regulations.gov" 
http://www.regulations.gov , including any personal information
provided, unless the comment includes information claimed to be
Confidential Business Information (CBI) or other information whose
disclosure is restricted by statute.  Do not submit information that you
consider to be CBI or otherwise protected through   HYPERLINK
"http://www.regulations.gov"  http://www.regulations.gov  or e-mail. 
The   HYPERLINK "http://www.regulations.gov"  http://www.regulations.gov
 Web site is an “anonymous access” system, which means EPA will not
know your identity or contact information unless you provide it in the
body of your comment.  If you send an e-mail comment directly to EPA
without going through   HYPERLINK "http://www.regulations.gov" 
http://www.regulations.gov , your e-mail address will be automatically
captured and included as part of the comment that is placed in the
public docket and made available on the Internet.  If you submit an
electronic comment, EPA recommends that you include your name and other
contact information in the body of your comment and with any disk or
CD-ROM you submit.  If EPA cannot read your comment due to technical
difficulties and cannot contact you for clarification, EPA may not be
able to consider your comment.  Electronic files should avoid the use of
special characters, any form of encryption, and be free of any defects
or viruses.  

Docket:  

	All documents in the docket are listed in the   HYPERLINK
"http://www.regulations.gov"  http://www.regulations.gov  index. 
Although listed in the index, some information is not publicly
available, e.g., CBI or other information whose disclosure is restricted
by statute.  Certain other material, such as copyrighted material, will
be publicly available only in hard copy.  Publicly available docket
materials are available either electronically in   HYPERLINK
"http://www.regulations.gov"  http://www.regulations.gov  or at: 

U.S. EPA Region III

Library, 2nd Floor

1650 Arch Street,

Philadelphia, PA, 19103-2029.

Phone:  (215) 814-5254

Business Hours:  Mon. thru Fri. - 8:00 am to 5:00 pm

Letterkenny Army Depot

Building 14

Chambersburg, PA 17201-4150

POC: Bryan Hoke

Phone: 717-267-9836

FOR FURTHER INFORMATION CONTACT: Gerald Hoover, Remedial Project Manager
(3HS11), U.S. Environmental Protection Agency, Region III, 1650 Arch
Str., Philadelphia, PA 19103-2029, (215) 814-2077

SUPPLEMENTARY INFORMATION: 

Table of Contents: 

I. Introduction 

II.  NPL Deletion Criteria 

III. Partial Deletion Procedures 

IV. Basis for Site Partial Deletion 

V.  Partial Deletion Action 

I. 	Introduction 

EPA Region III is publishing this direct final Notice of Partial
Deletion of portions of the Letterkenny Army Depot Southeastern (SE)
Area and Letterkenny Army Depot Property Disposal Office (PDO) Area
(Sites) from the National Priorities List (NPL).  This partial deletion
pertains to the soil and groundwater of parcels 24, 27, 28, 2-53, 2-53L,
2-54, 2-54L, 2-70, 2-70L, 3-89, 3-90, and 3-91.  The NPL constitutes
Appendix B of 40 CFR part 300, which is the Oil and Hazardous Substances
Pollution Contingency Plan (NCP), which EPA promulgated pursuant to
Section 105 of the Comprehensive Environmental Response, Compensation
and Liability Act (CERCLA) of 1980, as amended.  EPA maintains the NPL
as the list of sites that appear to present a significant risk to public
health, welfare, or the environment.  Sites on the NPL may be the
subject of remedial actions financed by the Hazardous Substance
Superfund (Fund).  This partial deletion of the Letterkenny Army Depot
SE and PDO Areas is proposed in accordance with 40 CFR 300.425(e) and is
consistent with the Notice of Policy Change:  Partial Deletion of Sites
Listed on the National Priorities List.  60 FR 55466 (Nov. 1, 1995).  As
described in 300.425(e)(3) of the NCP,  a portion of a site deleted from
the NPL remains eligible for Fund-financed remedial action if future
conditions warrant such actions.  

Because EPA considers this action to be noncontroversial and routine,
this action will be effective [insert date 60 days from the date of
publication in the Federal Register] unless EPA receives adverse
comments by [insert date 30 days after this publication in the Federal
Register]. Along with this direct final Notice of Partial Deletion, EPA
is co-publishing a Notice of Intent for Partial Deletion in the
“Proposed Rules” section of the Federal Register.  If adverse
comments are received within the 30-day public comment period on this
partial deletion action, EPA will publish a timely withdrawal of this
direct final Notice of Partial Deletion before the effective date of the
partial deletion and the partial deletion will not take effect.  EPA
will, as appropriate, prepare a response to comments and continue with
the deletion process on the basis of the Notice of Intent for Partial
Deletion and the comments already received.  There will be no additional
opportunity to comment. 

Section II of this document explains the criteria for deleting sites
from the NPL. Section III discusses procedures that EPA is using for
this action.  Section IV discusses the parcels 24, 27, 28, 2-53, 2-53L,
2-54, 2-54L, 2-70, 2-70L, 3-89, 3-90, and 3-91 of the Letterkenny Army
Depot SE and PDO Areas and demonstrates how they meet the deletion
criteria. Section V discusses EPA’s action to partially delete the
parcels from the NPL unless adverse comments are received during the
public comment period.

II. 	NPL Deletion Criteria 

	The NCP establishes the criteria that EPA uses to delete sites from the
NPL.  In accordance with 40 CFR 300.425(e), sites may be deleted from
the NPL where no further response is appropriate.  In making such a
determination pursuant to 40 CFR 300.425(e), EPA will consider, in
consultation with the Commonwealth, whether any of the following
criteria have been met:

	i. 	responsible parties or other persons have implemented all
appropriate 				response actions required; 

	ii. 	all appropriate Fund-financed response under CERCLA has been 			
implemented, and no further response action by responsible parties is 		
	appropriate; or 

	iii. 	the remedial investigation has shown that the release poses no
significant 			threat to public health or the environment and,
therefore, the taking of 				remedial measures is not appropriate. 

	Pursuant to CERCLA section 121(c) and the NCP, EPA conducts five-year
reviews to ensure the continued protectiveness of remedial actions where
hazardous substances, pollutants, or contaminants remain at a site above
levels that allow for unlimited use and unrestricted exposure.  EPA
conducts such five-year reviews even if a site is deleted from the NPL. 
EPA may initiate further action to ensure continued protectiveness at a
deleted site if new information becomes available that indicates it is
appropriate.  Whenever there is a significant release from a site
deleted from the NPL, the deleted site may be restored to the NPL
without application of the hazard ranking system.

III. 	Deletion Procedures 

	The following procedures apply to the deletion of parcels 24, 27, 28,
2-53, 2-53L, 2-54, 2-54L, 2-70, 2-70L, 3-89, 3-90, and 3-91 of the
Letterkenny Army Depot SE and PDO Areas: 

	(1)	EPA has consulted with the Commonwealth of Pennsylvania prior to
developing this direct final Notice of Partial Deletion and the Notice
of Intent for Partial Deletion co-published in the “Proposed Rules”
section of the Federal Register.

	(2) 	EPA has provided the Commonwealth 30 working days for review of
this notice and the parallel Notice of Intent for Partial Deletion prior
to their publication today, and the Commonwealth, through the
Pennsylvania Department of Environmental Protection (PADEP), has
concurred on the partial deletion of the Sites from the NPL, with the
condition that future use of the deleted parcels remains
commercial/industrial. 

	(3) 	Concurrently with the publication of this direct final Notice of
Partial Deletion, a notice of the availability of the parallel Notice of
Intent for Partial Deletion is being published in a major local
newspaper, The Chambersburg Public Opinion.  The newspaper notice
announces the 30-day public comment period concerning the Notice of
Intent for Partial Deletion of the Sites from the NPL. 

	(4) 	The EPA placed copies of documents supporting the partial deletion
in the 		deletion docket and made these items available for public
inspection and 			copying at the 	Sites’ information repositories
identified above. 

	(5) 	If adverse comments are received within the 30-day public comment 
		period on this partial deletion action, EPA will publish a timely
notice of 			withdrawal of this direct final Notice of Partial Deletion
before its 				effective date and will prepare a response to comments
and continue with 			the deletion process on the basis of the Notice of
Intent for Partial 				Deletion and the comments already received. 

	Deletion of a portion of a site from the NPL does not itself create,
alter, or revoke any individual’s rights or obligations.  Deletion of
a portion of a site from the NPL does not in any way alter EPA’s right
to take enforcement actions, as appropriate.  The NPL is designed
primarily for informational purposes and to assist EPA management. 
Section 300.425(e)(3) of the NCP states that the deletion of a portion
of a site from the NPL does not preclude eligibility for further
response actions, should future conditions warrant such actions.  

IV. 	Basis for Partial Site Deletion 

	The following information provides EPA's rationale for deleting
portions of the Sites from the NPL: 

Site Location 

	Letterkenny Army Depot (LEAD) is located in south-central Pennsylvania
in Franklin County, 5 miles north of the Borough of Chambersburg.  The
Depot covers 19,243 acres, most of which is devoted to ammunition
storage.  LEAD was the subject of two listings on the National
Priorities List (NPL).  The first was for the Southeastern (SE) Area,
and the second was for the Property Disposal Office (PDO) Area.  These
two areas are separated by a major groundwater/surface-water drainage
divide.  The industrial and maintenance areas, which are primarily
located in the southeastern corner of LEAD, encompass approximately
2,500 acres and include warehousing, vehicle storage, administration,
industrial/maintenance, recreational activities, and housing.  The
infrastructure of this area includes roads; permanent, semi-permanent,
and temporary structures; and utilities.  Approximately 1,235 acres at
LEAD have been designated for “realignment” under the Base
Realignment and Closure (BRAC) initiative.  “Realignment” means that
the mission at LEAD is changing and approximately 1,235 acres at LEAD
have been designated for release and transfer (i.e.,
“to-be-excessed” or to transfer ownership).  The BRAC area is
concentrated in the southeastern portion of LEAD, but is located in both
the PDO and SE Areas.  The BRAC area is being transferred to the
Letterkenny Industrial Development Authority (LIDA) in phases.  To date,
LEAD has completed three parcel transfer phases, covering 761 acres. 
The Phase I parcels were transferred in 1998.  The Phase II parcels were
transferred in 2002.  The Phase III parcels were transferred in 2004.  

Site Background and History 

	LEAD was originally established as an ammunition storage facility,
Letterkenny Ordnance Depot, in 1942.  A vehicle maintenance program was
started in 1947.  In subsequent years additional missions were added and
the facility was renamed the Letterkenny Army Depot in 1962.  The
principal missions at LEAD currently include maintenance, modification,
storage, and demilitarization operations on tactical missiles,
conventional ammunition, and tactical wheeled vehicles.  Operations
conducted at LEAD involved cleaning, stripping, plating, lubrication,
demolition, chemical/petroleum transfer/storage, and
washout/deactivation of ammunition.  Many of these missions/activities
involved the use and/or disposal of chlorinated solvents, primarily
trichloroethene (TCE) and 1,1,1-trichloroethane (TCA), along with
petroleum hydrocarbons and other solvents.

	The Letterkenny Army Depot SE Area (EPA ID PA6213820503) was listed on
the NPL in the final rule appearing in the 7/22/87 Federal Register (52
FR 27620-27642).

 	The Letterkenny Army Depot PDO Area (EPA ID PA2210090054) was listed
on the NPL in the final rule appearing in the 3/13/89 Federal Register
(54 FR 10512-10517).

	The parcels to be deleted from the NPL are all in an area known as the
Southern Martinsburg Shale Region (SMSR), which is an area underlain by
the Martinsburg Shale.  These parcels are located in both the SE Area
and the PDO Area.  All of these parcels have been transferred from the
Army to the LIDA under the BRAC Act of 1995.  These parcels have been
incorporated into the Cumberland Valley Business Park which is a
commercial/industrial business park.  The property consists of
industrial land, developed land, small stands of trees, open grassy
areas, commercial recreational areas (golf course and community center),
administration buildings, and former military housing.  No wetlands are
located within the parcels, and no Federal or state threatened or
endangered species are known or suspected to exist within the parcels. 
Land located within an approximately 0.5-mile radius of the parcels
includes industrial land to the north (including land to be retained by
the Army), an industrial area to the east (other BRAC sites as well as
land to be retained by the Army), agricultural land to the south, and
industrial land to the west (other BRAC property).  The parcels are
accessible to the general public via Coffey Avenue, which was
transferred to LIDA and is maintained by the local townships.  

	This partial deletion covers the following parcels: 24, 27, 28, 2-53,
2-53L, 2-54, 2-54L, 2-70, 2-70L, 3-89, 3-90, and 3-91 (See Table 1). 

Table 1: LIDA/Parcels and the associated media included in the partial
deletion

LIDA Parcel #	

Parcel #	

Decision Document	

Contaminated Media

24, 2-24B	24	Phase I ROD, SEP 1998

Phase III ROD, AUG 2003	Soil & Groundwater

Soil & Groundwater

27, 2-27B, 3-27C, 3-27D	27	Phase I ROD SEP 1998

Phase II ROD, JULY 2001

Phase III ROD, AUG 2003	Soil & Groundwater

Soil & Groundwater

Soil & Groundwater

28, 3-28B	28	Phase I ROD SEP 1998

Phase III ROD, AUG 2003	Soil & Groundwater

Soil & Groundwater

2-53	2-53	Phase II ROD, JULY 2001

Phase III ROD, AUG 2003	Soil & Groundwater

Soil & Groundwater

2-53L	2-53L	Phase II ROD, JULY 2001

Phase III ROD, AUG 2003	Soil & Groundwater

Soil & Groundwater

2-54	2-54	Phase II ROD, JULY 2001

Phase III ROD, AUG 2003	Soil & Groundwater

Soil & Groundwater

2-54L	2-54L	Phase II ROD, JULY 2001

Phase III ROD, AUG 2003	Soil & Groundwater

Soil & Groundwater

2-70	2-70	Phase II ROD, JULY 2001

Phase III ROD, AUG 2003	Soil & Groundwater

Soil & Groundwater

2-70L	2-70L	Phase II ROD, JULY 2001

Phase III ROD, AUG 2003	Soil & Groundwater

Soil & Groundwater

3-89-1, 3-89-2, 3-89-3, 3-89-4, 3-89-5, 3-89-6, 8-89-7, 3-89-8, 3-89-9,
3-89-10, 3-89-11, 3-89-12, 3-89-13, 3-89-14, 3-89-15, 3-89-16, 3-89-17,
3-89-18, 3-89-19, 3-89-20, 3-89-21, 3-89-22, 3-89-23, 3-89-24, 3-89-25,
3R-89-26, 3R-89-27, 3R-89-28, 3R-89-29	3-89	Phase III ROD, AUG 2003	Soil
& Groundwater

3-90	3-90	Phase III ROD, AUG 2003	Soil & Groundwater

3-91	3-91	Phase III ROD, AUG 2003	Soil & Groundwater

The location of these parcels within the boundaries of the SE and PDO
sites can be seen on the map located in the site repositories.

Remedial Investigation and Feasibility Study (RI/FS) – Phase I Parcels

Parcel 24 - Building 500 (part of soil SE OU 8): 

	Parcel 24, which includes Building 500 and adjacent lands, was
identified through historical aerial photographs as having been used for
open vehicle storage early in LEAD’s operation (post World War II). 
Two test trenches were completed in this parcel, and one sample was
analyzed for Target Analyte List (TAL) metals and total petroleum
hydrocarbons (TPH).  The only compound that exceeded the screening
criteria was arsenic, which slightly exceeded the EPA Region III
risk-based concentration (RBC).  EPA and PADEP, along with the Army, as
part of the BRAC Cleanup Team (BCT), agreed that the detected
concentration did not warrant further remedial action for industrial
use.  Arsenic is a naturally occurring metal, and arsenic results
obtained at LEAD are not inconsistent with the published background
concentrations for this metal in Pennsylvania.  Residential and
child-intense use scenarios were not evaluated.

Parcel 27 and Parcel 28:   

	No evidence of soil contamination was identified for these two parcels
and therefore no further work was necessary.

	At the time of the RI/FS for the Phase I Parcels, it was believed that
there was groundwater contamination underlying all of the Phase I
parcels.  The human health risk assessment showed unacceptable risk if
groundwater contact and use were unrestricted.   The FS evaluated
institutional controls as a remedy to restrict the property for
commercial and industrial use only and to prevent exposure to the
underlying groundwater.  

Selected Remedy - Phase I Parcels

	The Phase I Parcels ROD was signed in September 1998.  The selected
remedy in the Phase I ROD was institutional controls.  This was a final
remedy with respect to soils, and an interim remedy for groundwater. 
The selected remedy included the following components:

Restricting the property for commercial and industrial use only.

Not permitting soil excavation activities below a depth of 3 feet above
the water table without prior approval of the Army.

Not permitting construction of any subsurface structure for human
occupation without the prior approval of the Army, PADEP, and the EPA.

Restricting access or use of the groundwater underlying the property
without the prior written approval of the Army, PADEP, and the EPA.

Remedial Investigation and Feasibility Study (RI/FS) – Phase II
Parcels

Parcels 2-53, 2-54, and 2-70 (Phase II Parcels): 

	No evidence of soil contamination was identified for these three
parcels and therefore no further work was necessary.

	At the time of the Phase II transfer, it was believed that the
groundwater underlying all of the Phase II parcels was contaminated with
or potentially contaminated with volatile organic compounds.  To
expedite transfer, the Army and LIDA defined the Phase II parcels to
exclude the groundwater.  The Phase II parcels are defined to include
only the surface structures and soil to a depth of 8 feet below ground
surface (ft bgs), which is above the seasonal high groundwater table. 
The FS evaluated institutional controls as a remedy to prevent exposure
to the underlying groundwater. 

Selected Remedy - Phase II Parcels

	The Phase II Parcels ROD was signed in July 2001.   The Phase II ROD
determined that no action is necessary to protect public health or
welfare, or the environment from the soil at parcels 2-53, 2-54 and
2-70.  Because of the suspected groundwater contamination throughout the
Phase II parcels, the selected interim remedy for groundwater in the
Phase II ROD consisted of land use controls.  The land use controls
include the following restrictions:

Prohibiting soil excavation, digging, drilling, or other soil-disturbing
activities below a depth of 3 ft above the water table without the prior
approval of the Army.  

Prohibiting access to or the use of the groundwater underlying the Phase
II parcels without the prior approval of the Army, PADEP, and EPA.

Prohibiting construction of any subsurface structure for human
occupation without the prior approval of the Army, PADEP, and EPA.

	LIDA’s final reuse plan calls for industrial/commercial use for the
majority of the Phase II parcels.  There are zoning restrictions imposed
by Greene Township to preclude residential use of land that includes
Parcels 2-53, 2-54, and 2-70.  However, those restrictions are
independent of the NPL status of the Site and are not a result of
environmental contamination.  

Remedial Investigation and Feasibility Study (RI/FS) – Phase III
Parcels

SOIL:

Parcel 3-89:  

	Parcel 3-89 comprises the majority of the Phase III parcels/SMSR area
and is located in both the PDO and SE Areas.  The parcel consists of
approximately 191 acres on the northern side of Carbaugh Avenue and the
western side of Coffey Avenue.   Soil investigations were conducted at
the Open Vehicle Storage Area, Former Uncurbed Aboveground Storage Tank
(AST) North of Building 532, and the Backwash Discharge Area from the
Water Treatment Plant.  The soil investigations are summarized in the
following paragraphs. 

Open Vehicle Storage Area (OVSA) site (part of soil OUs PDO OU 6 and SE
OU 8): 

	The OVSA comprises the majority of Parcel 3-89.  From approximately
1947 and continuing until the spring of 1998, the OVSA site was used for
the storage of military vehicles.  The most recent past practice of
storage required that the vehicles be drained of fluids (such as diesel
fuel, oil, and other engine fluids) before being stored.  However,
interviews with former employees indicate that the vehicles were
formerly stored “wet,” meaning that they were stored with the fluids
still in the vehicle, and that the vehicles’ fluids may have leaked
onto the ground before they were refurbished.  

	Remedial Investigations were conducted at the OVSA site in 1998, 1999,
and 2000.  The investigations showed possible risks associated with
elevated levels of a group of semivolatile organic compounds (SVOCs)
referred to as polycyclic aromatic hydrocarbons (PAHs) in soil.  An
engineering evaluation/cost analysis (EE/CA) was written to evaluate the
need for a removal action.  Based on the EE/CA findings a Removal Action
was conducted in 2000.   The cleanup levels used for the removal action
were developed based on a future commercial/industrial post-removal
reuse of the site.   Approximately 45,000 tons of soil contaminated with
PAHs were excavated and disposed of at approved off-site waste disposal
facilities.  Confirmatory sampling conducted after the removal action
showed that the remaining concentrations of PAHs were at or below
risk-based standards.  A post-removal risk assessment was performed
assuming a future commercial/industrial use as well as a potential
future residential (unrestricted) use.  The risk assessment showed
concentrations of chemicals found in site soils, sediments, surface
water, and groundwater posed no unacceptable risks to people, plants, or
animals based on current and future commercial/industrial reuse. Risks
to people based on a theoretical future residential use are within
acceptable limits. 

Former Uncurbed Aboveground Storage Tank (AST) North of Building 532
site (part of PDO OU 6): 

	This is a small site that consists of a former aboveground storage tank
(AST) area.  Initially, there was an uncurbed single-walled AST (275
gallons) located north of Building 532 that stored gasoline used to fuel
golf carts.  This single-walled AST was replaced by a double-walled AST.
 It is unknown how long the single-walled AST was in service.  The soils
near the uncurbed AST were not investigated prior to the change in ASTs.
 The double-walled AST was still in place at the time of the remedial
investigation in 1999; however the double-walled AST has subsequently
been removed because the golf course converted to electric golf carts.  
 

	An investigation was completed to determine if the operation of the
former AST at the site had caused a release of contaminants to site
soil. Soil sampling was performed in April 1999. Soil borings, soil
sampling and analysis, data validation, and surveying were performed.
The investigation results did not indicate any chemicals of concern
(COCs) in soil and there were no potential sources of groundwater
contamination found. Only two chemicals (acetone and lead) were
identified as chemicals of potential concern (COPCs) based on a
comparison of maximum chemical concentrations to the lowest regulatory
residential benchmarks. However, the remedial investigation/risk
assessment showed that concentrations of chemicals found in site soils
pose no unacceptable risks to people based on current and likely future
commercial/industrial use. Risks to people are also within acceptable
limits based on a theoretical future residential use. There is minimal
habitat available capable of sustaining plants and animals at this site;
therefore, ecological risks were not evaluated.

Backwash Discharge Area from the Water Treatment Plant site (part of SE
OU 8): 

	This site is located in the eastern part of the parcel along Coffey
Avenue, near the water treatment plant for the potable water supply.  In
the past, sediments that accumulated in the raw water line were flushed
out in the western area of the site.  In the past, fluffy material
(referred to as “flocculant”), which primarily consists of suspended
solids removed from the water during the treatment process, was
discharged to the eastern area of the site for settling.  

	An investigation was completed to determine if the former water
treatment plant flocculant and backwash sediment disposal practices had
caused a release of contaminants to site soil and sediments.  Field
activities were performed in October 1998. Soil borings, soil and
drainage ditch soil sampling and analysis, sediment sampling and
analysis, data validation, and surveying were performed. The
investigation results did not indicate any COCs in soil and there were
no potential sources of groundwater contamination found. Various metals
were identified as COPCs based on a comparison of maximum chemical
concentrations to the lowest regulatory residential benchmarks. However,
the remedial investigation/risk assessment showed that concentrations of
chemicals found in site soils pose no unacceptable risks to people,
plants, or animals based on current and likely future
commercial/industrial uses.  Risks to people are also within acceptable
limits based on a theoretical future residential use.

Parcel 3-90: 

	Parcel 3-90 is approximately 8 acres in size and is located south of
Carbaugh Avenue and west of Coffey Avenue.  Parcel 3-90 is located in
both the PDO and SE Areas.  There are no structures on this parcel. 
This parcel is currently open land and has been an open area in the past
with no apparent storage or industrial activities.   No further work was
necessary.  

Parcel 3-91:  

	Parcel 3-91 is approximately 1.5 acres in size and is located east of
Coffey Avenue and north of Texas/Innovation Avenue in the southeastern
corner of the SMSR.  Parcel 3-91 is located entirely within the SE Area.
 There are no structures on Parcel 3-91.  This parcel consists entirely
of the western portion of the Building 400 Series Fire Training Area
(FTA) site where industrial activities occurred.  The Building 400
Series FTA area had been reportedly used in the past for a short period
of time as a fire-fighting training area where a large metal pan was
placed on the ground and filled with various flammable liquids, which
were ignited.  There was no record of the exact location of the pan,
years of use, or when or if the pan was removed from the area when
training activities ended.  Historical aerial photographs from 1949 and
1957 show several disturbed places in this area.  Based on knowledge of
typical fire-training activities at LEAD, materials burned at the site
may have included waste oils.  There were no structures or
material/waste storage on the site at the time of the remedial
investigation in 1998.  The only structures in the vicinity of the site
were several old barracks/office buildings, which are still located near
the site.  

	An investigation was completed to determine if the former fire training
activities had caused a release of contaminants to site soil.  Field
activities were performed in September 1998.  A geophysical survey, test
trenching, soil sampling and analysis, data validation, and surveying
were performed.  The investigation results did not indicate any COCs in
soil and there were no potential sources of groundwater contamination
found. One VOC (acetone), two SVOCs (PAHs), various metals, and
polychlorinated dibenzo-p-dioxins/polychlorinated dibenzofurans
(PCDDs/PCDFs) were identified as COPCs based on a comparison of maximum
chemical concentrations to the lowest regulatory residential benchmarks.
 However, the remedial investigation/risk assessment showed that
concentrations of chemicals found in site soils pose no unacceptable
risks to people, plants, or animals based on current and likely future
commercial-industrial use.  Risks to people are also within acceptable
limits based on a theoretical future residential use.  

GROUNDWATER:  

SMSR Groundwater:  

	As stated above, all of the parcels in this partial deletion are in the
SMSR.  The SMSR contains an area of shale bedrock surrounded by
downgradient limestone bedrock. This shale bedrock is generally more
resistant to weathering than the surrounding limestone formations and
therefore, forms the “highland” or elevated ridge areas. The SMSR
straddles the boundary between the PDO and SE Area NPL Sites.  Based on
the geologic and topographic upgradient setting and the lack of
industrial activities within the SMSR it was thought that the SMSR could
be unaffected by the known and potential VOC sources located
downgradient of the SMSR.  Therefore a groundwater investigation was
initiated in 1999 to prove that the SMSR was not impacted by any
previous industrial activities at Letterkenny.  Four rounds of
groundwater sampling were conducted in late 1999 through 2000 and then
in 2002. Results of the sampling showed that there is no VOC groundwater
contamination in the SMSR. Without VOC groundwater contamination there
is no potential for vapor intrusion risk throughout the SMSR.  A
screening level risk assessment showed that risks to people based on
current and future commercial/industrial use are within acceptable
limits. Risks to people based on a possible, but unlikely, residential
use (including human consumption of site groundwater) are within
acceptable limits.  Based on the finding of no VOC contaminated
groundwater, the PDO portion of the SMSR was redefined as PDO OU 7 and
the SE portion was redefined as SE OU 13.  

Parcels 2-53L, 2-54L, and 2-70L:  

	These parcels consist of land underneath parcels 2-53, 2-54, and 2-70,
which were previously transferred as part of the Phase II BRAC property
transfer at LEAD.  These parcels consist of land starting 8 ft. below
ground surface and extending to the center of the earth.  They are
located in the southern part of the SMSR/Phase III area within SE OU 13.
 As stated above, in the Phase II transfer, the entire land area was not
originally transferred because it was thought the groundwater located
underneath the land was potentially contaminated with VOCs.  These
parcels were investigated as part of the SMSR groundwater investigation
described previously.  The Army has completed its investigation and risk
assessment for the SMSR groundwater and found no environmental concerns
at the site.  The top portions of these parcels were transferred with an
interim remedy for groundwater consisting of restrictions on soil
excavation and groundwater use because at that time it was thought that
the groundwater underneath the parcels was contaminated.  The Phase III
ROD stated that the soil excavation and groundwater restrictions could
be removed.  

Selected Remedy - Phase III Parcels

SOIL:

	As stated above, all parcels subject to this partial deletion are part
of the SMSR  For Parcel 3-89, the Army, EPA, and PADEP have determined
that risks to people, plants, and animals from potential contact with
soils/sediments were acceptable at the OVSA, Former Uncurbed AST North
of Building 532, and the Backwash Discharge Area sites and that no
action is necessary to protect public health or welfare or the
environment.  For the OVSA site, this conclusion is based on the
conditions of the site following the removal action that was performed
in 2000 when PAH-contaminated soil was removed from the site.  There
were no environmental concerns in Parcels 3-90 and 3-91.  

GROUNDWATER:	

	Based on the findings of the SMSR groundwater investigation, there is
no VOC groundwater contamination and thus no unacceptable risks from
groundwater in this area.  

	The Phase III ROD was signed in August 2003.  Based on the results of
the remedial investigations and risk assessments it was determined that
No Further Action was necessary for the Phase III Parcels under CERCLA. 
 The No Further Action remedy applies to the SMSR groundwater (PDO OU 7
and SE OU 13) and to the soils (PDO OU 6 and SE OU 8).  In addition the
ROD stated that no further action was necessary for the groundwater
underlying Phase I Parcels 24, 27, 28 and Phase II Parcels, 2-53, 2-54,
2-70 and the underlying Parcels 2-53L, 2-54L, and 2-70L because they are
a part of SE OU 13.  

Response Actions/Cleanup Goals/Operation & Maintenance

	There are no response actions, cleanup goals, or operation &
maintenance due to the No Further Action decision in the Phase III ROD
for both soils and groundwater.  Land use controls restrict the use of
Phase I parcels to commercial and industrial use only and prohibit
residential use.

Five-Year Review(s) 

	EPA concurred with the Army’s first Five-Year Review for the PDO Area
on March 12, 2007.  EPA concurred on the first Five-Year Review for the
SE Area in November 2001 and the second Five-Year Review for the SE Area
on June 24, 2008.   

	In the 2007 Five-Year Review for the PDO Area, it was determined that
the No Further Action Remedy for PDO OU 7 and a portion of PDO OU 6 is
still considered protective of human health and the environment.  This
Five-Year Review did not find any issues relating to the parcels
included in this partial deletion.

	In the 2008 Five-Year Review for the SE Area, it was determined that
the No Further Action Remedy for SE OU 13 and a portion of SE OU 8 is
still considered protective of human health and the environment.  This
Five-Year Review did not find any issues relating to the parcels
included in this partial deletion.

	Pursuant to CERCLA section 121(c) and the NCP, the next PDO Area
five-year review will be conducted in 2012 and the next SE Area
five-year review will be conducted in 2013 to ensure other OUs at each
respective Superfund Site where waste was left in place are protective
of human health and the environment.

Community Involvement 

	Public participation activities have been satisfied as required in
CERCLA section 113(k), 42 U.S.C. 9613(k), and CERCLA section 117, 42
U.S.C. 9617.  Documents in the deletion docket which EPA relied on for
recommendation of the deletion from the NPL are available to the public
in the information repositories.  

Public participation related to parcels in deletion package: 

Phase I Proposed Plan public meeting held on April 7, 1998 to present
the proposed remedy for the Phase I Parcels.  

Phase II Proposed Plan public meeting held on February 22, 2001 to
present the proposed remedy for the Phase II Parcels.  

Phase III Proposed Plan public meeting held on April 23, 2003 to present
the proposed remedy for the Phase III Parcels.  

Determination that the Criteria for Deletion have been Met

	No further response action under CERCLA is appropriate.  EPA has
determined based on the investigations conducted at these parcels and
documented by the 3 RODs described above, that the Army has implemented
all appropriate response actions required. Through the previous PDO and
SE areas five-year reviews, EPA has also determined that the Phase III
Parcels No Further Action remedy is considered protective of human
health and the environment and, therefore, taking of additional remedial
measures is not necessary.  Other procedures required by 40 CFR
300.425(e) are detailed in Section III.

V. 	Deletion Action 

	The EPA, with concurrence dated March 2, 2010 of the Commonwealth of
Pennsylvania through the Pennsylvania Department of Environmental
Protection, has determined that all appropriate response actions under
CERCLA have been completed. Therefore, EPA is deleting parcels 24, 27,
28, 2-53, 2-53L, 2-54, 2-54L, 2-70, 2-70L, 3-89, 3-90, and 3-91 of the
Letterkenny Army Depot SE and PDO Areas Sites from the NPL. 

Because EPA considers this action to be noncontroversial and routine,
EPA is taking it without prior publication. This action will be
effective [insert date 60 days from the date of publication in the
Federal Register] unless EPA receives adverse comments by [insert date
within 30 days of this publication in the Federal Register].  If adverse
comments are received within the 30-day public comment period, EPA will
publish a timely withdrawal of this direct final notice of partial
deletion before the effective date of the partial deletion and it will
not take effect. EPA will prepare a response to comments and continue
with the deletion process on the basis of the notice of intent to
partially delete and the comments already received. There will be no
additional opportunity to comment.  

List of Subjects in 40 CFR Part 300 

Environmental protection, Air pollution control, Chemicals, Hazardous
waste, Hazardous substances, Intergovernmental relations, Penalties,
Reporting and recordkeeping requirements, Superfund, Water pollution
control, Water supply. 

July 12, 2010						/s/ by William C. Early for  

Dated:							Shawn M. Garvin,

							Regional Administrator, 

							Region III.



For the reasons set out in this document, 40 CFR part 300 is amended as
follows: 

PART 300—[AMENDED]

1. The authority citation for part 300 continues to read as follows:

Authority: 33 U.S.C. 1321(c)(2); 42 U.S.C. 9601-9657; E.O. 12777, 56 FR
54757, 3 CFR 1991 Comp., p. 351; E.O. 12580, 52 FR 2923, 3 CFR 1987
Comp., p. 193.

Appendix B—[Amended]

2. Table 2 of Appendix B to part 300 is amended by revising the entries
under Pennsylvania for "Letterkenny Army Depot (SE Area), Chambersburg"
and "Letterkenny Army Depot (PDO Area), Franklin County" to read as
follows:

Appendix B to Part 300—National Priorities List



TABLE 2. — FEDERAL FACILITIES SECTION

State	Site name	City/County	Notes (a)

PA

PA	* * * * * * * 

Letterkenny Army Depot (SE Area)

* * * * * ** 

* * * * * * * 

Letterkenny Army Depot (PDO Area)

* * * * * * *	Chambersburg

Franklin County	P

P

(a) * * * 

*P = Sites with partial deletion(s).

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