10th and Osage Revitalization
Grant number BF 97840901-0 awarded 9/27/07
Project Overview: 10th and Osage Revitalization.
Remove and dispose of contaminated soil on property to facilitate it’s redevelopment into a
transportation-oriented development.
Management and Coordination:
Other contact: Stacey Eriksen, Department of Housing and Neighborhood Development. 720913-1561 stacey.eriksen@denvergov.org
Description of Cleanup Activities:
Contaminated soil was removed, disposed of, and replaced with clean fill. Cleanup was
performed under the Colorado Department of Public Health and Environment’s Voluntary
Cleanup Program. Voluntary Cleanup Plan Application Approval for 10th and Osage
properties, July 3, 2008 Letter addressed to Alioune Sogue, City and County of Denver from
Fonda Apostolopoulos Colorado Department of Public Health and Environment
Community Relations:
The City and County of Denver contacted the Mercado Coalition and the LaAlma/Lincoln Park
Planning group regarding the grant application. The Mercado Coalition provided comments on
the grant application, which were incorporated. They also provided a letter of support as did
City Councilwoman Judy Montero. Notice of the application was posted on the website
http://www.milehigh.com/neighborhood/brownfield/LincolnParkEPAProposal
however no additional comments were received.
Notice of the successful cleanup grant was published in the Denver Post and on EPA’s website.
Email notification was provided to the Mercado Coalition.
Representatives from the City and County of Denver’s Office of Economic Development,
Department of Housing and Neighborhood Development, and Community Planning and
Development have been working closely with multiple interested groups on the station area plan
and neighborhood plan. Planning for the area was conducted in partnership with the Denver
Housing Authority and considered neighborhood revitalization, economic development, quality
of life improvements, creating a mixed-use, mixed-income neighborhood, enhancing multimodal connectivity within TOD area, and supporting the Santa Fe commercial corridor
Summary of Outreach
 Neighborhood Assessment completed June 2006.
 Denver Transit-Oriented Development(TOD) Strategic Plan completed August 2006.
 Station Area Planning (10th and Osage) initiated early 2007.
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First Public Workshop for the Station Area Plans for 10th & Osage, Decatur and Auraria
West held on February 15, 2007-cleanup grant discussed at this meeting.
Second Public Workshop for the 10th & Osage, Decatur and Auraria West station area
plans held on May 9, 2007.
Third Public Workshop for the 10th & Osage, Decatur and Auraria West station area
plans held on November 15, 2007 at the Greenlee Elementary School.
Staff from Office of Economic Development, Community Planning and Development
and Department of Environmental Health attended LLPPF meeting on January 28, 2008
to discuss the cleanup and progress on the station planning.
A public meeting was held at the La Alma Recreation Center on Tuesday, April 21, 2009
to discuss the residential character in the La Alma / Lincoln Park Neighborhood.
DHA South Lincoln Park Homes redevelopment meeting held at the La Alma Rec Center
on June 9, 2009.
Currently drafting a combined Station Area Plan and Neighborhood Plan.
South Lincoln Redevelopment Master Plan completed August 2009
Denver Housing Authority held a public meeting on September 15, 2009
DHA will apply for a HOPE VI Grant from HUD in November 2009.
Site information:
The site is comprised of three acres of land on two parcels (944 and 1001 Osage St) currently
owned by the City and County of Denver (purchased on June 20, 2007 for $1,231,065.38) and
formerly owned by the Regional Transportation District (RTD). The site is adjacent to the 10th
and Osage Light Rail Station and is located at 944 and 1001 Osage Street, Denver, Colorado.
The two parcels are historically referred to as Parcel A (994 Osage Street) and Parcel B (1001
Osage Street).
Historically, the entire 10th and Osage Street site had been heavily used as a railroad operations
area. Currently 1001 Osage Street is being used as an equipment storage yard and parking area
by RTD, and 944 Osage Street is vacant, except for a stationary piece of equipment associated
with the adjacent light rail station. In addition, past uses of 1001 Osage Street included a stone
cutting yard and transformer storage facility. Past uses of 944 Osage included a construction
yard and residential units.
Contamination Issues:
One soil sample exceeded the City and County of Denver (CCoD) Soil Screening Level of 24
mg/kg (direct exposure) for arsenic. Six soil samples exceeded the draft CDPHE direct exposure
soil standard and CCoD Soil Screen Level for benzo(a)pyrene. One soil sample exceeded the
standard for benzo(b)fluoranthene and dibenzo(a,h)anthracene. No CDPHE groundwater
standards were exceeded in the samples collected across the Site. Exposure pathways include
ingestion, inhalation, or dermal exposure to contaminated soils.
Barium, cadmium, chromium and lead were identified in most of the ten soil samples at
levels below the Draft Colorado Department of Public Health and Environment (CDPHE)
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Soil Standards (protective of groundwater). Arsenic was detected in SB-03 from 0 - 2 feet
bgs at 89 milligrams per kilogram (mg/kg). In the remaining nine soil samples, arsenic
values were below 10 mg/kg. Concentrations of Total Extractable Petroleum
Hydrocarbon (TEPH) were detected in nine of the ten soil samples at a range of 16 to 140
mg/kg. Concentrations of Semivolatile Organic Compounds (SVOCs) exceeding City and
CDPHE soil screening standards were detected in seven of the ten soil samples. Soil
Boring (SB) samples SB-1, SB-2, SB-3, SB-4, SB-5 and GW-2, and GW-5 exceeded the
draft CDPHE direct exposure soil standard and CCoD Screening Level for
benzo(a)pyrene and GW-2 exceeded the standard for benzo(b)fluoranthene and
dibenz(a,h)anthracene. No PCB analytes were detected in any of the soil samples above
the laboratory detection limit of 0.085 mg/kg.
No CDPHE groundwater standards were exceeded in the five samples collected across
the Site. Barium was detected in the five groundwater samples at levels below the
CDPHE Regulation 41 groundwater standards of 2 milligrams per liter (mg/L). Silver
was detected in GW-2 at a level below the CDPHE standard of 0.05 mg/L. Acetone in
GW-3 and tetrachloroethene (PCE) in GW- 5 were the only Volatile Organic Compound
(VOC) constituents detected. The concentration of the PCE detected in GW-5 (0.0011
mg/L) was below the CDPHE standard. Diesel range organics (DRO) were also detected
in GW-1, GW-2, and GW-3 (0.65, 0.49, and 0.74 mg/L respectively).
The Phase I environmental site assessment documented two other recognized environmental
conditions in connection with the subject property:
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A bulk oil storage facility located south of 1001 Osage, which is currently undergoing
remediation for groundwater contamination. State records indicate there has been no
impact to the subject property from this site.
A historic underground storage tank located north of and adjacent to 944 Osage
Street. There is no record of removal of or leaks associated with this historic tank, but
due to its downgradient location, it would not likely impact the subject property.
Future Use:
The site is currently going through a process to establish a light rail station area plan and a
neighborhood plan. Likely future use will be some sort of mixed-use transportation-oriented
development incorporating an affordable housing component. Please see attached documents for
the draft plan.
Cleanup Standards:
The assessment did detect contamination by arsenic in excess of the residential City and County
of Denver Soil Screening Level (SSL) and contamination of benzo(a)pyrene,
benzo(b)fluroanthene and dibenz(a,h)anthracene in excess of the residential SSL and draft
CDPHE direct exposure soil standards. No institutional controls will be necessary since
residential soil cleanup standards will be met and groundwater standards were not exceeded.
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Original Budgetary Cost Estimate for Removal of Impacted Soil -- 944 and 1001 Osage
Street, Denver, CO.
Task 1
VCUP
Applic
a-tion;
CDPH
E
VCUP
Fee
Task 2
Mobilization
Demobilization;
Excavation/
Loading and
Hauling
Task 3
Borrow
Material;
Backfill;
Disposal
(DADS)
Task 4
Engineering
Oversight
(12%)
$176,202
$129,936
$32,217
Task 5
Confirmation Soil
Sampling/
Cleanup
Report
Task 6
Contingency
(25%)
Total
$86,839
$434,194
Personnel
Fringe
Benefits
Travel
Equipment
Supplies
Contractual
Other
$7,000
Total
$7,000
Cost Share
$4,000
$7,000
$176,202
$129,936
$32,217
$154,355
$4000
$86,839
$441,194
$86,839
$241,194
Cleanup plan:
Brown and Caldwell provided the budgetary cost estimate based on the results of the Phase II
assessment. Levels exceeding the draft CDPHE direct exposure soil standard (and CCoD Soil
Screening Level) were identified in the Brown and Caldwell report for benzo(a)pyrene,
benzo(b)fluoranthene, and dibenz(a,h)anthracene. Arsenic exceeded the City and County of
Denver Soil Screening Level in the near surface (0-2 feet below ground surface). A Voluntary
Cleanup Plan (VCUP) Application will be prepared for submittal to the Colorado Department of
Public Health and Environment (CDPHE). Upon approval of the VCUP, the cleanup involved
excavation of contaminated soils, which were hauled away and disposed of in at the DADS
landfill. Confirmation soil sampling was conducted. Clean backfill was then spread and
compacted on the site. All cleanup activities were conducted with engineering oversight. The
cleanup cost estimate assumed removal of 6,247 in-place cubic yards of impacted soil. A no
action determination request was submitted to CDPHE at the conclusion of the cleanup activities.
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Environmental Results:
The workplan activities were consistent with EPA’s Strategic Plan and GPRA Goal 4: Healthy
Communities and Ecosystems, Objective 4.2 Communities – Sustain, Clean Up, and Restore
Communities and the Ecological Systems that Support Them, Sub-objective 4.2.3 Assess, Clean
Up and Redevelop Brownfields. The project will cleanup and assist with a transit-oriented
redevelopment for the site. Redeveloping brownfields sites and transit-oriented development are
goals in Mayor Hickenlooper’s sustainable development initiative, Greenprint Denver (see
www.greenprintdenver.org)
Work Plan Activities and Projected Environmental Improvements
Workplan Activities
Results of Activities
(Outputs)
Submit VCUP
Application and
approval
Quantity of soil
removed.
Excavate contaminated soil
Perform confirmation soil sampling
Quantity of soil
disposed.
Quantity of soil
replaced.
Sample results
Prepare cleanup report
Report
Post information on website
Cleanup information
is available to the
public.
Dispose of contaminated soil
Add clean fill dirt as needed
Projected
Environmental
Improvements
(Outcomes)
Establish that the
cleanup is protective.
Environmental
cleanup of site
Environmental
cleanup of site
Restore proper site
drainage
Confirm that cleanup
was performed
properly
Documentation that
the environmental
cleanup was
performed and the
results
Improved
understanding of
environmental issues
by the community.
Established
Baseline for
Measurement
CDPHE and Denver
soil cleanup standards.
Current condition of
the site as determined
by soil samples.
Compare to soil
cleanup standards.
Currently, only notice
of the application is
posted on the website.
Final Costs:
$200,000 EPA brownfields cleanup grant
$227,551.06 Denver Community Development Block Grant funds
$40,000 Economic Incentive Fund-20% non federal match
$467,551.06 Total cleanup cost
 $103,265.29 Waste Management
 $364,285.77 Pinyon Environmental Engineering and Resource Inc (MBE/WBE)
$24,000 in additional sampling costs were paid for under the EPA brownfields assessment grant
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