| Action Date |
Action |
Description |
DEC Staff |
| 4/21/2011 |
Site Added to Database |
A new site has been added to the database |
Mitzi Read |
| 4/25/2011 |
Document, Report, or Work plan Review - other |
Investigation conducted at the site in 2001 found DRO up to 3,420 mg/kg in gravel pad samples from near the former well. Corrective action was conducted in 2003 and 2004 and included removal of the entire gravel pad to tundra grade. Contaminated gravel was hauled to the Drill Site 4 Grind and Inject facility for disposal. Confirmation samples were not collected. |
Bill O'Connell |
| 4/25/2011 |
Document, Report, or Work plan Review - other |
Due to the difficulty in rehabilitating this site, CPAI is proposing to conduct soil sampling in 2011 to document any remaining contaminant concentrations at the site. |
Bill O'Connell |
| 4/25/2011 |
Exposure Tracking Model Ranking |
Initial ranking with ETM completed for source area id: 79078 name: ConocoPhillips West Sak 16 |
Bill O'Connell |
| 7/13/2011 |
Document, Report, or Work plan Review - other |
Reviewed work plan for 2011 sampling at West Sak 16. A visual inspection will be conducted at the former pad, ten soil samples will be collected from areas previously identified as potentially impacted by ABR, sheen testing will be conducted, and surface water samples will be collected. |
Bill O'Connell |
| 10/11/2011 |
Document, Report, or Work plan Review - other |
Reviewed West Sak 16 Sampling Report. Surface water samples were collected at two locations, surface soil samples were collected from 2 depths at 16 discrete locations for a total of 32 primary samples, and shovel sheen testing and visual inspections were conducted. Contaminants were not detected in surface water samples. Soil samples contained DRO indicative of hydrocarbon contamination at three sample locations at concentrations up to 12,300 mg/kg after silica gel cleanup. Sheen was noted after shovel sheen testing in several locations, particularly near sample location –006. |
Bill O'Connell |
| 12/23/2011 |
Document, Report, or Work plan Review - other |
Reviewed West Sak 16 Corrective Action Plan. At the former gravel pad, the remaining hotspots identified during 2011 sampling will be excavated, with approximately 815 cy of material excavated from each location to a depth of 1.5 feet below tundra grade (btg). Additional excavation if necessary will be guided by field screening but will not exceed 3 feet btg without ADEC approval. Due to the presence of salt which is inhibiting revegetation of the site, a 10-inch lift of mineral soil will be placed over the entire former gravel pad footprint followed by one foot of organic overburden. Additional material will be added as needed to minimize ponding of surface water near the wellhead or reserve pit cap. At the former flare pit and reserve pit, salt impacted overburden will be removed and replaced with mineral soil and organic overburden to facilitate revegetation. The project is tentatively scheduled for February 2012. |
Bill O'Connell |
| 4/6/2012 |
Update or Other Action |
Notification received from CPAI that, due to the harsh winter on the slope, the West Sak 16 corrective action has been postponed until 2013. |
Bill O'Connell |
| 11/1/2013 |
Potentially Responsible Party/State Interest Letter |
|
Keather McLoone |
| 11/26/2013 |
Document, Report, or Work plan Review - other |
Date of receipt of West Sak 16 Inactive Exploration Site Corrective Action Report. This document reports on activities conducted in February and March 2013. The work addressed the hot spots which were areas above applicable cleanup levels and concentrations remaining at the site were shown to be below cleanup levels. Conoco is requesting a closure decision. |
Keather McLoone |
| 12/9/2013 |
Cleanup Complete Determination Issued |
|
Keather McLoone |
| 1/14/2016 |
Update or Other Action |
Date REHABILITATION OF WEST SAK 16 EXPLORATORY WELL SITE, 2015 Progress Report by ABR was provided via Conoco SharePoint and saved to network. Brief document include some photos (including a 2015 aerial) and tables. |
Keather McLoone |
| 2/28/2017 |
Document, Report, or Work plan Review - other |
Reviewed document titled Rehabilitation of West Sak 16 Exploration Well Site, dated January 2017. Document includes a performance standards summary, figures, and tables. |
Joshua Barsis |
| 2/15/2018 |
Document, Report, or Work plan Review - other |
Reviewed the West Sak 16 Exploration Well Site 2017 Progress Report, dated January 2018. Document includes a performance standards summary, figures, and tables. |
Joshua Barsis |
| 1/24/2019 |
Document, Report, or Work plan Review - other |
Reviewed the January 2019 report titled: Rehabilitation of West Sak 16 Exploratory Well Site. The report document visual observations of the site in July 2018. |
Joshua Barsis |
