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FY2009 - Former Fort Ord - Environmental Cleanup

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STATUS<br />

Parcel: NONE<br />

Site ID: FTO-012<br />

Site Name: SITE 12 DOL AUTO MAINT. AREA/CANNIBAL.YD<br />

Regulatory Driver: CERCLA<br />

RRSE: HIGH<br />

Program: BRAC-IRP<br />

Contaminants of Concern: Semi-volatiles (SVOC),<br />

Volatiles (VOC)<br />

Media of Concern: Groundwater, Soil<br />

BRAC Round: BRAC II<br />

SITE DESCRIPTION<br />

CLEANUP/EXIT STRATEGY<br />

Phases Start End<br />

PA................... 199006........ 199012<br />

SI..................... 199006........ 199012<br />

RI/FS............... 199006........ 199510<br />

RD................... 199507........ 199712<br />

RA(C).............. 199612........ 199911<br />

RA(O).............. 199912........ 201709<br />

LTM................. 201710........ 202209<br />

RIP Date:<br />

199912<br />

RC Date: 201709<br />

FTO-012 Site 12 is located in the northwest portion of <strong>Fort</strong> <strong>Ord</strong>, east of Highway 1 and adjacent to Imjin Parkway. It encompasses<br />

approximately 12 acres. This site consisted of light industrial activities related to vehicle maintenance and unit level maintenance.<br />

Operations caused both soil and GW contamination. The area was assessed in the base-wide RI/FS (HLA, 1995).<br />

Contaminated soils and associated debris were excavated during cleanup activities at the site, and the area was backfilled with<br />

clean soil. RAs to address soil contamination have been completed.<br />

In April 1999 construction of a GW pump and treat system was completed and system operations began. During the operation of<br />

the treatment system, GW has been sampled to verify that the treatment system is operating effectively. Since 1999, water<br />

samples and water levels from GW monitoring wells have been collected every three months. This GW monitoring information has<br />

been compiled into quarterly and annual reports to show the long-term trends.<br />

From 2003 to 2005 <strong>Fort</strong> <strong>Ord</strong> initiated a GW optimization study of the operations. The optimization work identified that an addition of<br />

an air stripper with potassium permanganate adsorption would allow the system to operate at a greater volume and reduce the<br />

overall treatment period. The air stripper system has been installed and is operational. Groundwater modeling was completed in<br />

2008 and the results indicate that remediation to meet RA objectives would take an additional eight years until FY 2017.<br />

System operations will continue. Locations of monitoring wells will be modified (unneeded wells destroyed/new wells constructed)<br />

as plume footprint changes (shrinks) to ensure monitoring data accurately delineates plume footprint. GW sampling frequency will<br />

be reduced for specific wells as identified in annual reports. Once aquifer cleanup levels are met, treatment system operations will<br />

cease and monitoring continued to validate the remediation and support site closeout decision. The GW treatment system,<br />

extraction wells and pipelines as well as any remaining monitoring wells will be destroyed at site closeout.<br />

Final FORT ORD Installation Action Plan - 14

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