&ERA

United States
Environmental Protection
Agency

Colorado Department
of Public Health
and Environment

This update will tell you about:

J Site Background
J Sitewide Remedy
J Responsible Parties at the Lowry Site
J Progress of the Sitewide Remedy
S Ongoing Activities and Recent Changes
S 1,4-Dioxane Issues
S Second Five-Year Review
S Community Involvement

FIGURE! Site Location

Region 8

999 18th Street, Suite 300
Denver, CO 80202

Colorado, Montana,
North Dakota, South Dakota,
Utah, Wyoming

Remedial Activities Continue
and Second Five-Year Review Begins

EPA Region 8

July 2006

Lowry Landfill SuperfuncJ Site
Information Update No. 17

Site Background

The approximately 480-acre Lowry Landfill Superfund Site
(Lowry Site, or the Site) is located near the intersection of Quincy
Avenue and Gun Club Road in Arapahoe County, 15 miles
southeast of the City and County of Denver and 2 miles east of
Aurora, Colorado (Figure 1). The Denver Arapahoe Disposal Site,
an operating municipal solid waste landfill northeast of the
intersection of Gun Club Road and East Hampden Avenue, forms
the northern boundary of the Site. The City and County of Denver
(Denver) owns both the Site and the Denver Arapahoe Disposal
Site.

From the mid-1960s until 1980, Denver operated a "co-disposal"
landfill at the Lowry Site, which means that both industrial waste
(solid and liquid) and municipal solid waste were accepted for
disposal. The liquids were placed into 78 unlined trenches over
approximately 200 acres, and then solids such as soil, old tires,
and household refuse were added to the trenches to absorb the
liquids. The types of waste disposed at the Lowry Site using this
practice included industrial degreasers, paint, pesticides, hospital
and veterinary waste, metal-plating waste, petroleum products,
sewage sludge, tires, and household waste.

The United States Environmental Protection Agency (EPA)
estimates that approximately 138 million gallons of industrial
wastes were disposed of at the Lowry Site. Nearly all of these
wastes were disposed in the southern half of the Site within the
200-acre main landfill. A much smaller volume of waste was
placed north of the main landfill in ponds and waste pits. Some
liquids were sprayed directly onto the soil in large "leachate
spraying" areas located in the northern part of the Lowry Site.

During the 1970s and 1980s, millions of tires accumulated at the
Site. The tires were laid on top of other waste that had been placed
in three separate pits, each approximately 20-30 feet deep. From
1989 through 1992, Denver and its contractors removed, shredded,
and consolidated the tires and placed the tire shreds in a monofill
on the east side of the Lowry Site for potential future re-use as

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Changes to the 1994 ROD

EPA issued several changes to the ROD
based on new information obtained during
design and implementation of the remedy.

A minor modification to the ROD on
August 7, 1995, clarified the institutional
controls and allowed ongoing permitted
waste disposal to continue.

The first Explanation of Significant
Differences (ESD) on August 14, 1995, made
minor corrections to the performance
standards for groundwater, air quality, and
landfill gas and also modified the
groundwater point of action boundary.

The second minor modification to the ROD
on March 21, 1996, clarified the
requirements for mitigation of wetlands.

The second ESD on October 24, 1997,
modified the remedy to allow treated water
from the water treatment plan to be
discharged to an offsite publicly owned
wastewater treatment facility. The second
ESD also modified the remedy for the FTPA
waste pits to allow onsite treatment and
disposal of material excavated from the
FTPA waste pits.

The third minor modification to the ROD on
May 8, 2001, changed the air quality
performance standard for one compound.

The fourth minor modification to the ROD on
September 30, 2002, changed the
performance standards for groundwater, air
quality, surface water, and landfill gas.

A ROD Amendment in August 2005 changed
the remedy for the north and south FTPA
waste pits (refer to page 7 for more
information).

fuel. The area and three waste pits that lay under the tires became
known as the Former Tire Pile Area (FTPA).

In 1980, Denver stopped co-disposal practices. Landfill operations
continued at the Lowry Site until 1990, but were restricted to
disposal of municipal solid waste only. From 1980-1990, Waste
Management of Colorado (WMC) operated the Lowry Landfill
under a contract with Denver.

The waste disposed at the Lowry Site contaminated the soils and,
eventually, shallow groundwater. Additionally, gases from the
buried wastes contaminated the air spaces in subsurface soil.

In the mid-1970s, EPA, the Colorado Department of Public Health
and Environment (CDPHE), Denver, and other parties began
investigating the soil, groundwater, surface water, sediment, air
quality, and soil gas at the Lowry Site in response to complaints
from nearby residents about odor, disposal practices, and
potential fire danger. In 1984, EPA designated Lowry Landfill as a
Superfund Site. This designation allowed EPA to access federal
funding from the Superfund trust fund to conduct investigations
into the environmental problems there. The Superfund
designation also allowed EPA to compel those responsible for
disposal of hazardous substances to perform investigations or
otherwise contribute to the effort.

In 1990, all landfill operations at the Lowry Site stopped to allow
environmental investigations to proceed without interference. The
landfill operator, WMC, constructed a soil cover over the 200-acre
main landfill in the southern part of the Site. The landfill cover is
at least 4 feet thick and up to 12 feet in thickness in some places.

Site Investigations and Actions

After investigating the contamination at the Site, evaluating the
potential risk the Site posed to human health and the
environment, and considering alternative strategies for cleaning
up the Site, EPA selected a comprehensive plan for the Lowry Site
in 1994. The plan is described in detail in the Record of Decision
(ROD) signed by both EPA and CDPHE on March 10,1994.

The plan is based on the concept of "containment," which means
protective measures are put in place to prevent movement of
contamination off site above safe levels. The overall goal of
containment is to prevent human exposure to landfill gas, waste
pit liquids, and unsafe levels of contamination in soil, surface
water, and groundwater. EPA requires proof that safe levels are
achieved at locations inside the Site boundaries, called the point of
compliance (POC), illustrated on Figure 2. Most of the
components of the plan are currently in place and operating to
achieve the objectives described in the 1994 ROD. The completed
components are described below and shown on Figure 2.

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EAST
Legend:

A = Gas Extraction Wells

= New Landfill Gas Extraction Wells
~ = Construction Complete
¦ = Construction or Closure Pending

FIGURE 2. Sitewide Remedy Map

General Groundwater
Flow Direction

An 8,800-foot-long underground
Groundwater Barrier Wall of soil
and clay encloses the west, south,
and east sides of the main landfill
in the southern part of the Site.
The wall is below the ground
surface, approximately 40 to
75 feet deep. The wall minimizes
the flow of clean groundwater
onto the Site from the south and
west, and the flow7 of
groundwater away from the Site
to the east, reducing the volume
of contaminated groundwater
produced by contact with the
wastes buried in the landfill.

The existing landfill cover is
maintained as part of the plan
selected in the ROD. The cover
minimizes the amount of
rainwater that can seep into the
landfill, thereby reducing the
amount of groundwater that
could become contaminated by
contact with the wastes in the
landfill. In 1999, 2 feet of
additional soil cover were placed
on the 29-acre north face of the
landfill to provide a minimum
cover thickness of 4 feet over the
entire closed landfill area.

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At the northern limit of the main
landfill, a trench (North Toe
Extraction System) collects
contaminated groundwater flowing north from the buried wastes.
The groundwater collected in the trench is pumped to the water
treatment plant located at the northern boundary of the Site.

At the intersection of the Unnamed Creek alluvial channel and the
northern Site boundary, the North Boundary Barrier Wall (NBBW)
captures contaminated groundwater. This 1,000-foot-long and
30-foot-deep clay wall provides a barrier to groundwater flow to
the north. At the upstream side of the NBBW, a gravel bed allows
collection and removal of migrating groundwater. Groundwater
from the gravel bed is pumped to the water treatment plant,

Denver originally built an onsite water treatment plant in 1984.
The plant has undergone several upgrades, most recently in 2004.
Contaminated water collected from various areas of the Site is
treated at the plant to a level safe for discharge into a sanitary
sewer line. The discharged water eventually reaches the Metro

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Wastewater Reclamation District and the City of Aurora's
wastewater treatment facilities located off site. The City of Aurora
and the Metro Wastewater Reclamation District issued the
industrial pretreatment discharge permit for the water treatment
plant at the Site. The offsite facilities only accept water that
complies with the terms of the Site industrial pre-treatment
discharge permit.

Groundwater Sampling at the Lowry Site

North of the closed landfill area, contaminated groundwater is
kept separate from clean surface water within the streambed of
Unnamed Creek by a layer of permeable material that has been
placed in the streambed and covered with clay. The permeable
material provides a pathway for groundwater to flow to the
north without contacting surface water. The top of the clay
cover is now the streambed, allowing clean surface water to
run off the surrounding Site areas and migrate to the north
without coming into contact with contaminated groundwater
flowing underneath the cover.

A landfill gas collection system of 54 extraction wells was
installed in the main landfill to remove and burn gases
generated from the buried waste. In 2006,10 new landfill gas
extraction wells were added to the system to collect gas from
deeper within the landfill mass, kandfill gas extracted from
all 64 wells is routed to an enclosed flare at the northern end
of the Site where it is burned. Emissions from the flare are
monitored to ensure that they meet environmental standards and
are safe for the surrounding community.

As an extra measure of protection from exposure to the wastes
remaining at the Site, Denver, Arapahoe County, and the City of
Aurora enacted land and groundwater usage controls. These
controls work to prevent people from coming into contact with
the contaminated soil, water, or landfill gas that remains on the
Site. In addition to Denver, both EPA and CDPHE have the
authority to enforce the onsite controls.

Long-term monitoring programs are in place to evaluate the
effectiveness of the containment and collection systems, and the
overall protectiveness of the cleanup actions.

EPA identified more than 50 chemicals of concern at the Site
including volatile organic compounds, polynuclear aromatic
compounds, and metals. The contaminated shallow groundwater
at the Site is not used as a drinking water source. Current health
risks are limited because access to the Site is restricted. Offsite
groundwater used as drinking water is not believed to be
contaminated by the wastes from the Lowry Site.

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Responsible Parties at the Lowry Site

The Superfund law mandates that EPA require past and present
site owners and operators as well as parties who generated or
transported hazardous substances to Superfund sites to pay for
studies and perform the work at those sites. These parties are
known as Potentially Responsible Parties, or PRPs.

EPA identified more than 200 PRPs for the Lowry Landfill
Superfund Site. In November 1994, EPA ordered 34 of the major
PRPs (the owners and operators of the Site, the Site's largest-
volume waste generators, and transporters to the Site) to perform
the work to design, construct, and operate the sitewide remedy.
Three of these PRPs, Denver, WMC, and Chemical Waste
Management of Colorado, Inc. (CWM), reached agreements with
the other PRPs to perform the Site work on behalf of themselves
and the other PRPs. Denver, WMC, and CWM are responsible for
designing, constructing, and operating the sitewide remedy
under EPA and CDPHE oversight.

In August 2005, the United States reached a settlement with
Denver, WMC, CWM, and five other PRPs after nearly
3 years of litigation. Under the settlement, the settling
defendants agreed to pay $13.9 million to reimburse the
United States' past response costs and to perform and finance
the remainder of known work at the Site. Notice of the
proposed settlement was published in the Federal Register on
August 26, 2005. After a 30-day public comment period, the
federal district court entered the Consent Decree embodying
the settlement. Denver, WMC, and CWM (the Work Settling
Defendants) are performing and financing the remainder of
known work at the Site on behalf of themselves and the other
settling defendants.

Progress of the Sitewide Remedy

As of 2006, all components of the sitewide remedy have been
constructed and accepted by EPA except the components for the
FT PA waste pits (see Figures 2 and 3). Denver, WMC, and CWM
are operating, maintaining, and monitoring the constructed
remedy components under oversight by EPA and CDPHE.

Figures 2 and 3 show the sitewide remedy components and the
status of the remedial actions. Figure 4 depicts the construction
status of remedy components.

Monitoring Well Installation

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FIGURE 3. Sitewide Remedy Components and Status

Remedy Component

Description

Status

Institutional Controls

Institutional Controls Plan listing regulations,
laws, and covenants that govern land use, water
use, zoning, and access.

EPA approved the plan on
September 26, 2002.

Surface Water Removal Action
(SWRA)

Drain with clay cover, and treatment of
groundwater in onsite water treatment plant
(WTP).

EPA certified completion on
August 11, 2005.

Wetlands Mitigation

Constructed wetlands to replace those lost
during construction of the SWRA.

EPA certified completion on
August 12, 2005.

Landfill Gas (LFG) Extraction
and Treatment System

LFG collection and treatment system.

EPA certified completion on
February 11, 1998.

North Boundary Barrier Wall
(NBBW) System

Subsurface barrier wall at northern Site
boundary; groundwater collection drain
upgradient of wall, and injection trench
downgradient of wall.

EPA certified completion
March 27, 1998.

North Toe Extraction System
(NTES)

Shallow groundwater collection trench at
northern toe of landfill mass.

EPA certified completion on
September 10, 1998.

East/South/West Groundwater
Barrier Wall

Soil-bentonite slurry wall surrounding east, west,
and south sides of landfill to restrict
contaminated water from flowing off site.

EPA certified completion on
September 30, 1998 (slurry wall),
and January 25, 1999
(monitoring system).

Well 38 Area Gradient Control
Contingency Measure

Groundwater extraction via wells from the MW38
sand channel.

EPA certified completion on
August 11, 2005.

New Water Treatment Plant

Upgraded WTP to pre-treat Site waters on site,
followed by discharge to and final treatment in
Publicly Owned Treatment Works (POTW).

EPA certified completion on
August 11, 2005.

FT PA Middle Waste Pit

Excavation of the FTPA Middle Waste Pit and
construction of the onsite treatment cell.

EPA certified completion of the
Middle Waste Pit on August 3,
2005. Closure of the treatment
cell is ongoing.

North Face Cover

Placement of additional clay cover over 29 acres
on the North Face of landfill.

EPA certified completion on
January 7, 2000.

Well Abandonment Program

Removal of wells that were constructed
improperly or no longer serve a useful purpose.

EPA certified completion on
November 17, 1997.

Performance and Compliance
Monitoring

Development and implementation of a long-term
monitoring plan to assess compliance with
performance standards for all remedy
components.

EPA certified construction
completion of the wells on
August 12, 2005. Long-term
monitoring program is ongoing.

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Surface
Water
Removal
Action

	T\

Slurry
Walls

North Toe
Ground-Wati
Extractic

,3 Landfill Gas
Extraction

Wetlands
Mitigation

^ Upgrades
to New
On-Site
WTP

Landfill
Cover

FIGURE 4. Construction Status of
Remedy Components

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Former Tile Pile Area Remedy

The FTPA comprises about 54 acres north of the main landfill area
and east of Unnamed Creek (see Figure 2). Initial investigations
found three separate waste pits at this location. These pits are
separate from the main closed landfill in the southern portion of
the Site, although they contain similar wastes. The 1994 ROD
called for digging into the FTPA waste pits to remove surface and
subsurface drums, free liquids, and other visual contamination.
Contaminated materials were to be disposed of off site. In 1997,
EPA changed that plan to allow the contaminated materials to be
treated using controlled aeration and disposed of on site. Denver,
WMC, and CWM (and their contractors) successfully completed
excavation of the middle waste pit in 1998.

In May 1999, while excavating the north waste pit, those parties'
contractors encountered more highly contaminated waste liquids
and vapors than had been anticipated. Some contaminated vapors
were expected and precautions had been taken such as digging
within an enclosed structure and ventilating and treating vapors
from the structure. However, the amount and toxicity of vapors
produced were not expected, overwhelmed the safety measures in
place, and became dangerous to the workers. As a result, EPA
granted permission for the digging to stop. Subsequently, EPA
required additional investigations and studies in the FTPA waste
pits.

After reviewing the results of these studies, EPA proposed a
fundamental change in the selected remedy for the remaining two
FTPA waste pits. The new remedy was described in a Proposed
Plan for the FTPA, issued to the general public by EPA in
May 2005. EPA held two public meetings in June 2005 to hear the
public's comments on the proposed change.

After reviewing public, State, and local government comments on
the Proposed Plan, EPA issued a ROD Amendment on August 12,
2005, selecting Capping with Product Recovery as the remedial
action for the north and south FTPA waste pits. This was the
alternative that EPA proposed in the May 2005 Proposed Plan.
Capping with Product Recovery includes pumping the most
highly contaminated liquids from the north and south waste pits,
transporting these liquids off site for disposal, maintaining a cap
on the waste pits, and monitoring groundwater migrating from
the waste pits.

The contaminated soils removed from the FTPA middle waste pit
in 1999 were consolidated in a lined and covered cell where they
were treated using controlled aeration to remove the volatile
contaminants. Treatment continued until 2003 when the treatment
goals were achieved.

As part of the remaining work at the FTPA, Denver, WMC, and
CWM will remove the cover from the treatment cell and move the
treated soils to a new, permanent location within the main landfill

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mass. The benefits of moving the treated soils to this new location
are that they will be underneath the landfill cap and surrounded
by the underground Groundwater Barrier Wall and groundwater
monitoring system.

Although the soils were treated to remove volatile contaminants,
there are other contaminants in the soils that were not removed by
the treatment process. State and EPA regulations require that soils
exhibiting characteristics of hazardous waste meet specific
standards if they are disposed on the land. The treated soils do not
meet these standards for a few contaminants. If the soils are being
managed as part of a Superfund cleanup action, regulations allow
them to be disposed of on site within a specially designed and
designated management unit without meeting the standards. The
management unit is called a "Corrective Action Management
Unit/' or "CAMU," As part of the remaining work at the FTPA
waste pits, a CAMU will be constructed within the main landfill
mass and the treated soils will be permanently disposed of in the
CAMU.

All of the remaining work at the FTPA waste pits is expected to
begin during the summer of 2006.

Groundwater Monitoring Plan

The ROD requires ongoing monitoring, including sampling of
groundwater, surface water, landfill gas, sediments, and water
treatment plant effluent, to provide information about how well
the remedy components are working.

In February 2005, EPA approved an updated comprehensive
Groundwater Monitoring Plan (GWMP) for the Site. This new
GWMP incorporates many of the components of previous
monitoring plans that had been in place at the Site. However, it
also reflects the increased understanding derived during the
Remedial Investigation, Remedial Design, and Remedial Action
phases of work at the Site and from approximately 7 years of
subsequent operation, monitoring, and maintenance of the
various components of the Site's groundwater containment
system.

During the more than 20 years that the Site has been investigated
and its remedy implemented, hundreds of wells have been
installed and used extensively to monitor the occurrence,
movement of, and contaminant levels in the groundwater
underlying the Site. In addition, hundreds of soil borings have
been drilled into the Site to better understand the geology so that
the remedy can be monitored to assure it is effective and
protective. The information from the existing wells and soil
borings was carefully considered in the selection of the wells that
are designated for long-term monitoring in the GWMP.

The GWMP will be used to ensure that the groundwater
containment remedy remains effective and protective, and in

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What is a CAMU?

A Corrective Action Management Unit, or
CAMU, is a designated area on a site that
is undergoing remediation where
hazardous waste from remediation
activities is treated, stored, or disposed.
The CAMU concept was created by EPA
regulations to encourage treatment at
remediation sites. The CAMU concept
provides EPA and authorized states the
flexibility to develop site-specific design,
operating, closure, and post-closure
requirements for CAMUs in lieu of design
requirements for land-based units
specified in the Resource Conservation
and Recovery Act (RCRA).

EPA has a strong preference for using
CAMUs to facilitate treatment at
remediation sites. Remediation waste
placed in a CAMU does not have to meet
treatment standards for land-disposed
waste specified in RCRA. When a CAMU
is used, remediation waste may be
treated and then placed in a CAMU,

CAMUs may be located in
uncontaminated areas at a site, and
wastes may be consolidated into CAMUs
from areas that are not contiguously
contaminated.

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compliance with water quality standards, in perpetuity. The
GWMP was submitted by Denver, VV.MC, and CWM and
approved by EPA with concurrence from CDPHE and the Tri-
County Health Department on February 18, 2005. The
groundwater monitoring program is a component of the overall
remedy for the Site.

Compliance with groundwater performance standards is
monitored vertically (with depth) as well as horizontally (near the
property boundaries). The GWMP includes the following
elements:

Compliance Monitoring - Groundwater quality monitoring along
the downgradient boundaries of the POC (Figure 2) to assess
compliance with groundwater performance standards to verify
the protectiveness of the containment remedy;

Effectiveness Monitoring - Water level and/or water quality
monitoring to assess the effectiveness of the four components of
the containment remedy at the site (i.e. Perimeter Slurry Wall,
North Toe Extraction System, North Boundary Barrier Wall,
and MW38 Channel); and

Vertical Monitoring - Groundwater quality monitoring to
provide early detection of possible future vertical migration,
if any, of contamination immediately downgradient of the
main landfill mass and the FTPA waste pits.

The GWMP also describes the specific responses that Denver,
WMC, and CWM will undertake if groundwater does not
meet Site performance standards at a given well.

Landfill Cover Operation and Maintenance

The ROD requires maintenance of the existing cover on the
main landfill mass. The landfill cover is an important
component of the containment remedy because it minimizes
the amount of rain water that can seep into the landfill mass,
Well 38 Source Area Control Investigation	thereby reducing the amount of groundwater that could

become contaminated by contact with the wastes in the
landfill. A large landfill cover maintenance project will begin in
2006. The project involves regrading the landfill cover to increase
its slope and promote drainage of surface water runoff away from
the landfill mass. The regrading project will reduce the future
maintenance activities for the cover.

Denver, WMC, and CWM proposed to regrade the landfill cap by
additional landfilling of construction and demolition debris on the
Section 6 landfill. The landfilling operation will fill underground
air space, promote positive drainage, and increase the slope of the
landfill cover. The slope will be increased by removing and
stockpiling 2 feet of the cover and placing an additional
5.6 million cubic yards of construction and demolition debris on
top of the landfill. The cover will then be replaced and
reconstructed. No municipal solid waste disposal will be allowed

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and only limited industrial waste will be approved for disposal.
Construction materials may include masonry, concrete, brick, and
rock. The regrading project is expected to continue for 7-14 years.

North End Investigation

As part of the ongoing groundwater monitoring program, the
chemicals 1,4-dioxarie and nitrate were detected in 2005 at levels
above performance standards in three shallow groundwater wells.

The GWMP requires that whenever standards for groundwater
are not met in compliance wells and there is a potential for the
contamination to migrate off site, Denver, WMC, and CWM
must evaluate the extent of the problem. In 2005, Denver,
WMC, and CWM installed 42 temporary wells, 13 permanent
wells, and 76 soil gas survey points in the north end of the Site
to evaluate the extent of the problem.

In January 2006, EPA approved a work plan for a more
extensive investigation. The North End Investigation of
groundwater is continuing. The objective of the North End
Investigation is to determine the extent of the groundwater
and surface water impacts in this area. Additional information
on the 1,4-dioxane detections and the investigations are
North End Investigation Well Installation	provided in the insert to this update.

Second Five-Year Review for the Lowry Landfill

The Superfund law requires EPA to review the cleanup actions at
Superfund sites where contamination has been left in place. These
reviews are required to be conducted at least every 5 years. The
purpose of the "Five-Year Review" is to determine if the actions
are protective of human health and the environment.

EPA completed the first Five-Year Review for the Site in
September 2001. EPA started work on the second Five-Year
Review for the Lowry Site in March 2006, and will complete the
review by September 30, 2006.

EPA, the lead regulatory agency at the Lowry Site, is responsible
for conducting the Five-Year Reviews. CDPME, the support
regulatory agency, will also participate in the review. As part of
its conduct of the second review, EPA will review Site documents
and data, conduct a Site inspection, and gather input from other
regulatory agencies, local government officials, and the general
public.

EPA will prepare a report summarizing the review's findings and
will notify the public of the availability of the report. You will be
able to review the report at the Site information centers listed on
page 12 of this upda te. EPA will also report the results of the
second Five-Year Review to Congress.

EPA uses three key questions to
determine whether the remedy is
protective of human health and
the environment:

1.	Is the remedy functioning as
intended by the Record of Decision
or ROD, the document that presents
the remedy to be used at a
Superfund site?

2.	Are the assumptions used at the time
of remedy selection still valid?

3.	Has any new information come to
light that could affect the
protectiveness of the remedy?

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Community Involvement

Community involvement is an important part of the remedial
process to keep the public informed about the Lowry Site and to
provide opportunities to participate in the Superfund process.
EPA and CDPHE welcome your participation.

The Lowry community involvement program includes meetings,
fact sheets, a Web site, and opportunities to comment on key
documents.

Technical Assistance Grants

EPA awards Technical Assistance Grants (TAG) to local
community groups to hire technical advisors to review Site
activities such as studies, designs, and construction. At the Lowry
Site, EPA awarded a TAG to the Citizens for Lowry Landfill
Environmental Action Now (CLLEAN), a group of local area
residents. Members of CLLEAN and its consultants attend
technical meetings and review Site activities on behalf of area
homeowners' associations.

For information about CLLEAN, please contact Bonnie Rader at
(303) 912-2905.

Site Tours

EPA would be happy to help arrange a site tour or meeting for
interested school, community, or local homeowners' association
groups to provide more information about the Lowry Site. For
information, please contact Nancy Mueller at (303) 312-6602.

Update to the Community Involvement Plan

EPA is preparing an update to the Site Community Involvement
Plan. The update will identify community issues and concerns,
and recommend specific community involvement activities. EPA
will conduct interviews and update the official contact lists, public
meeting locations, and local media contacts. EPA will complete
the update in September 2006 in conjunction with the second
Five-Year Review.

Schedule of Future Activities

North Area Investigation and remediation

Well 38 Source Area Design Construction

Treatment Cell Closure

Ongoing O&M of remedy components

Ongoing monitoring program

FTPA north and south waste pit planning

Second 5-Year Review

FTPA north and south waste pit design and
construction

Ongoing O&M of remedy components
Ongoing monitoring program
Landfill and FTPA covers construction and O&M

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Where to Find More Information on the Lowry Site

EPA Superfund Records Center

Aurora Public Library

(Complete Site Files and Administrative Record) (Selected Documents)

999 18th Street

14949 East Alameda Drive

Denver, CO 80202

JKUjnk Aurora, CO 80012

(303) 312-6473

(303) 739-6600

Additional information about the Lowry Site can also be obtained on the Internet at:

httD ://www.eDa.20v/ reeion8/superfund/ sites/co/1 owrv.html

Key Contacts

If you have questions about the Five-Year Review at the Lowry Site or would like to be added to (or removed

from) the mailing list, please contact any of the following individuals:

EPA

^ P

r-fe'

CDPHE

Bonnie Lavelle

Angus Campbell

Remedial Project Manager

Or

State Project Officer

(303) 312-6579 or 1-800-227-8917, ext. 6579



(303) 692-3385 or 1-888-569-1831, ext. 3385

lavelle.bonita@epa. gov

Ac

angus.campbell@state.co.us

Nancy Mueller

n

Marion Galant

Community Involvement Coordinator



State Community Relations Manager

(303) 312-6602 or 1-800-227-8917, ext. 6602



(303) 692-3304 or 1-888-569-1831, ext. 3304

mueller.nancv@epa.gov



marion.galant@sta te.co.us









% V Yy j? 999 18th Street, Suite 300

U.S. Environmental Protection Agency

Office of Communications and Public lnvolvement-80C (NM)

,o^ Denver, Colorado 80202-2466

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