Appendix M: Installation Narrative Summaries - denix
Appendix M: Installation Narrative Summaries - denix
Appendix M: Installation Narrative Summaries - denix
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In December 1988, the BRAC Commission recommended<br />
realignment instead of closure of the Pueblo Depot Activity,<br />
primarily because of the future chemical demilitarization<br />
mission. Contaminated sites include a landfill, open burning and<br />
detonation grounds, ordnance and explosives waste areas,<br />
lagoons, former building sites, oil-water separators, a TNT<br />
washout facility and discharge system, and hazardous waste<br />
storage units. Heavy metals, volatile organic compounds<br />
(VOCs), and explosives are the primary contaminants affecting<br />
soil and groundwater. In FY94, the installation formed a<br />
Restoration Advisory Board (RAB) and a BRAC cleanup team,<br />
and the community formed a local redevelopment authority,<br />
which prepared a land reuse plan. In October 1996, the Army<br />
placed Pueblo Depot Activity under the Chemical and Biological<br />
Defense Command (now the Chemical Materiels Agency) and<br />
changed its name to Pueblo Chemical Depot. In FY96, the<br />
installation developed Team Pueblo to coordinate public<br />
involvement in restoration, reuse, closure, and cleanup. In<br />
FY99, RAB members approved the RAB charter. Prior to FY00,<br />
the Army completed a major groundwater treatment system, an<br />
explosives-contaminated soil removal, installed carbon filter<br />
units on drinking water source wells contaminated with<br />
explosives constituents, and investigated off-site contamination<br />
in public wells associated with the TNT washout facility and<br />
provided drinking water to affected off-site well water users.<br />
The installation has 29 unexploded ordnance (UXO) sites, for<br />
which the Army has completed most surface and subsurface<br />
clearance. The cleanup progress at Pueblo Chemical Depot for<br />
FY02 through FY05 is detailed below.<br />
In FY02, the Army made modifications to the groundwater<br />
treatment system at Solid Waste Management Unit (SWMU) 17<br />
to improve groundwater capture. Work began on a second pilot<br />
study to evaluate in situ biotechnology for expediting<br />
groundwater cleanup. The Army completed soil bioremediation<br />
and stored the treated soil pending approval from the State for<br />
onsite disposal. The Army constructed the SWMU 14 soil vapor<br />
extraction (SVE) system and operation commenced. The<br />
installation achieved no further action (NFA) status for two sites<br />
and was in the final stages of a petition for NFA at another six<br />
sites. The Army also initiated an inventory of closed,<br />
transferred, and transferring (CTT) ranges and sites with UXO,<br />
Army<br />
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discarded military munitions (DMM), or munitions constituents<br />
(MC). The installation identified areas designated for wildlife<br />
reuse for early transfer. The installation initiated a UXO<br />
management plan.<br />
In FY03, the installation initiated additional investigations and<br />
pilot studies at the Southwest Terrace (SWMU 17) and South<br />
Central Terrace (SWMUs 14, 28, 36, and 58) to evaluate in situ<br />
groundwater treatment technologies for accelerating cleanup<br />
and reducing long-term operations. The installation received<br />
Colorado's approval for the SWMU 20 NFA and completed an<br />
interim corrective measure for SWMU 36. The installation<br />
completed modifications to the groundwater treatment system<br />
at SWMU 17. The Army completed the inventory of CTT ranges<br />
and sites with UXO, DMM, or MC. It identified 14 Military<br />
Munitions Response Program (MMRP) sites at the installation<br />
and approved 3 other sites for NFA for UXO clearance.<br />
In FY04, the installation maintained compliance for the<br />
groundwater treatment system at SWMU 14. The Army<br />
constructed an air-sparging system at SWMU 14 to enhance<br />
the SVE system, and initiated in situ groundwater treatment<br />
pilot studies at SWMUs 28, 36, and 58. The installation<br />
submitted NFA petitions for SWMUs 53, 54, and 55, which were<br />
not approved due to environmental covenant requirements. The<br />
installation initiated a corrective action, which involved the<br />
installation of additional extraction and injection wells, and<br />
conducted a Phase II pilot study for in situ groundwater<br />
treatment for SWMU 17. The Army identified a new<br />
groundwater flow channel that bypasses the current<br />
groundwater treatment system at SWMU 17. Treatment of<br />
domestic wells in off-installation areas continued successfully.<br />
In FY05, the installation completed in situ groundwater<br />
treatment pilot studies at SWMUs 28, 36, and 58. The<br />
installation completed the corrective measures study (CMS) for<br />
all four South Central Terrace Area SWMUs (14, 28, 36, and<br />
58) and submitted it to the State for review. Three in situ pilot<br />
studies for the SWMU 17 groundwater plume were completed.<br />
The Army received state NFA approval at two sites. The<br />
installation coordinated with the State to optimize long-term<br />
groundwater monitoring requirements resulting in lower cost<br />
with continued assurance that potential groundwater releases<br />
from SWMUs can be identified. Under the MMRP, the<br />
installation completed the draft conceptual site model (CSM) for<br />
SWMU 34 and submitted it for regulatory review.<br />
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Pueblo Chemical Depot received state approval on the South<br />
Central Terrace Area CMS (SWMUs 14, 28, 36, and 58).<br />
Partnerships between the State of Colorado and installation<br />
personnel expedited resolution on environmental covenants to<br />
allow remedy selection for these sites. The installation<br />
completed the draft CMS for the former TNT Washout Facility<br />
and SWMU 18, and requested NFA approval on SWMU 18<br />
from the State. Regulators approved RCRA facility<br />
investigations at SWMUs 19 and 41. Regulators also approved<br />
NFA for SWMUs 42, 48, and 59. Additionally, the installation<br />
bypassed ion-exchange treatment at the most highly<br />
contaminated boundary treatment area in South West Terrace<br />
using innovative technology that will result in significant cost<br />
savings each year. A fixed-price contract was awarded for the<br />
Southern Industrial Area that resulted in additional cost savings<br />
and allowed expedited investigation activities.<br />
Administrative and regulatory issues delayed NFA approval<br />
from the State for SWMUs 47 and 53.<br />
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Regulatory issues delayed approval on the CSM for SWMU 34.<br />
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Plan of action items for Pueblo Chemical Depot are grouped<br />
below according to program category.<br />
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0 Receive state approval on CMS for SWMU 17,<br />
investigation at SWMU 29, and NFA at SWMUs 49<br />
and 50 in FY07-FY08.<br />
0 Initiate treatment at SWMUs 28 and 36 in<br />
FY07-FY08.<br />
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0 Receive state approval on CSM for SWMU 34 in<br />
FY07-FY08.<br />
0 Submit CMS for SWMUs 34 and 45 in FY07-FY08.<br />
M-168
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