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1. Introduction
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1.1 Background
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Site Number: |
Z8 |
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Contract Number: |
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D.O. Number: |
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Action Memo Date: |
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Response Authority: |
OPA |
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Response Type: |
PRP Oversight |
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Response Lead: |
PRP |
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Incident Category: |
Removal Assessment |
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NPL Status: |
Non NPL |
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Operable Unit: |
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Mobilization Date: |
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Start Date: |
12/4/2009 |
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Demob Date: |
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Completion Date: |
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CERCLIS ID: |
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RCRIS ID: |
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ERNS No.: |
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State Notification: |
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FPN#: |
E10802 |
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Reimbursable Account #: |
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1.1.1 Incident Category
1.1.2 Site Description
The tanker accident occurred 11/14/09 at milepost 179, US Hwy 160, Rio Grande County, (approximately 4 ½ miles south of South Fork), Colorado. An estimated 3,800 gallons of gasoline drained from the overturned tanker across and under the highway into wetlands between the highway and the South Fork Rio Grande River.
1.1.2.1 Location
1.1.2.2 Description of Threat
Groundwater contamination and at a minimum dissolved BTEX in river. Due to ice no sheen or product can be observed in the river. The river is thought to be habitat for the Rio Grande Cutthroat Trout. There are many water users downstream. The wetlands is on property administered by the US Forest Service, Rio Grande National Forest.
1.1.3 Preliminary Removal Assessment/Removal Site Inspection Results
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2. Current Activities
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2.1 Operations Section
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2.1.1 Narrative
11/18: PRP-contracted clean-up contractor arrived on Site for initial recon, followed by crew mobilization.
11/19: Clean-up contractor initiated detailed surface and sub-surface survey(s) in the wetlands beween the highway and the river, and along riverbanks downstream of the accident site.
12/01: Clean-up contractor initiated installation of monitoring / recovery / extraction wells and trenches.
12/03: Clean-up contractor initiated recovery of free-product from various wells and tranches via bailing, pumping, and sorbents.
12/21: Contractors temporarily ceased on-site activities due to inclement weather and holiday road restrictions.
Clean-up contractor notified down-stream water users of activities via posted flyers.
01/08/10: Interceptor trench completed, including liner installation and insulating blanket coverage.
01/11: START collected co-located water samples with PRP clean-up contractor. Analytical results are reasonably consistent with PRP sample data.
PRP clean-up contractor(s) continue to recover free product from the various wells and trenches, constructed in the wetlands, between the spill site and the river channel. The clean-up contractor reports measuring up to five inches (5”) of free product in various monitoring wells as well as elevated PID readings at various monitoring stations. To date, survey crew(s) reports no observed sheen in the river or stain along the river bank below the spill site.
2.1.2 Response Actions to Date
2.1.3 Enforcement Activities, Identity of Potentially Responsible Parties (PRPs)
2.1.4 Progress Metrics
| Waste Stream |
Medium |
Quantity |
Manifest # |
Treatment |
Disposal |
| gas/water |
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500 gal |
001334768 |
Arvada TreatmentCtr LLC |
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2.2 Planning Section
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2.2.1 Anticipated Activities
• At direction of EPA/8 OSC, clean-up contractors will install three additional monitoring wells.
• PRP will continue coordinating plans and activities with representatives of CDOT, CSP, USFS, BLM, and EPA/8 OSC.
• Clean-up contractor will continue recovery of produce from constructed recovery wells and trenches, and will construct three additional recovery holes.
• Clean-up contractor(s) will perform maintenance on downstream boom. Upper boom completely under >1 foot of ice, but may still be functional.
• Survey crew(s) will continue monitoring downstream environs, addressing any downstream product release, if such release occurs.
2.2.1.1 Planned Response Activities
2.2.1.2 Next Steps
EPA/8 OSC will continue oversight of PRP-lead clean-up activities.
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2.3 Logistics Section
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No information available at this time.
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2.4 Finance Section
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No information available at this time.
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2.5 Other Command Staff
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No information available at this time.
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3. Participating Entities
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No information available at this time.
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4. Personnel On Site
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No information available at this time.
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5. Definition of Terms
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No information available at this time.
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6. Additional sources of information
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No information available at this time.
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7. Situational Reference Materials
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No information available at this time.
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