| Action Date |
Action |
Description |
DEC Staff |
| 10/1/2010 |
Document, Report, or Work plan Review - other |
Initial plan submitted during October 2010 to cover the early spill response effort conducted later the same month. Plan does not include RRO samples. Plan would have been approved by PERP. |
Keather McLoone |
| 1/25/2011 |
Document, Report, or Work plan Review - other |
Date of Corrective Action Workplan Groundwater Investigation and Groundwater Monitoring Well Installation. This document discusses intallation and sampling of four permanent groundwater monitoring wells to further delineate extent of contamination and evaluate whether contaminants are impacting the Mat River. The plan was to install these wells in early spring 2011. |
Keather McLoone |
| 3/3/2011 |
Document, Report, or Work plan Review - other |
Date of receipt of Milepost 77 Glenn Highway Phase II ESA/Release Investigation report submitted by Alaska Resources and Environmental Services on behalf of Big State Logistics. This report covers work done in October 2010 including field screening to guide excavation of contaminated soil and confirmation sampling with analyes for DRO and BTEX. The soil sample with the highest PID reading was also analyzed for PAHs. Excavation extent was limited by bedrock and presence of roadway. Groundwater was not encountered during this field effort. Soil was treated at ASR , will seek clarification that no permanent stockpile was created as part of this effort.
Soil was excavated from two areas to depths of 6 to 8 feet bgs. Review included laboratory data review checklist, some results should be considered estimated with a low bias due to being analyzed outside of holding time, some due to sample result outside calibration range and surrogate outside criteria. Report recommends that groundwater wells be installed to help address the groundwater and surface water pathways. Benzene, toluene, ethylbenzene, xylenes and DRO exceed migration to groundwater cleanup levels. 2-Methylnaphthalene also exceed migration to groundwater. Samples were not analyzed for GRO or RRO. |
Keather McLoone |
| 3/8/2011 |
Spill Transferred from Prevention Preparedness and Response Program |
Spill transferred by PERP staff John Brown. Spill no. 10239928001; spill date = 10/7/2010; substance = #1 low-sulfur diesel; quantity = 2,460 gallons. |
Mitzi Read |
| 3/10/2011 |
Site Added to Database |
A new site has been added to the database |
Mitzi Read |
| 3/10/2011 |
Exposure Tracking Model Ranking |
Initial ranking with ETM completed for source area id: 79050 name: 2,460 Gallons #1 Low Sulfur Diesel From Tanker Rollover |
Mitzi Read |
| 3/14/2011 |
Update or Other Action |
DEC letter commenting on groundwater workplan received by CSP as part of site transfer. ADOT&PF contacted and replied that any re-alignment activities would be in the upgradient (opposite side of road) direction. |
Keather McLoone |
| 3/22/2011 |
Document, Report, or Work plan Review - other |
Receipt via email of revised Corrective Action Workplan - Groundwater Investigation & Groundwater Monitoring Well Installation. ADEC CSP comments were incorporated but additional comments were communicated with a conditional approval via email on this date. Work is scheduled to begin April 4. |
Keather McLoone |
| 4/20/2011 |
Update or Other Action |
Notified via email that there was some confusion regarding the land ownership status. Also, the river thawed before the well installation could take place. |
Keather McLoone |
| 6/3/2011 |
Update or Other Action |
Notified via email that the intent was to modify the plan to include passive samplers for surface water for sampling this year and attempt to install wells again next year. |
Keather McLoone |
| 6/27/2011 |
Site Visit |
Site visit was made to observe the area. Suggested that before the revised workplan is submitted (have been looking for it for a couple of weeks) that some other approaches such as well points or passive samplers for porewater sampling be considered in addition to considering the diffusion bags for sampling surface water. |
Keather McLoone |
| 7/26/2011 |
Potentially Responsible Party/State Interest Letter |
|
Keather McLoone |
| 8/1/2011 |
Document, Report, or Work plan Review - other |
Email from responsible party indicating that the consultant is still Alaska Resources & Environmental Services, LLC. |
Keather McLoone |
| 9/15/2011 |
Document, Report, or Work plan Review - other |
Receipt via email of Corrective Action Workplan - Groundwater Investigation and Groundwater Monitoring Well Installation. This revised plan was submitted due to delayed field effort last spring, reportedly due to confusion over land ownership which delayed a mobilization until after some thawing prohibited driving a drill rig on the Chickaloon River.
Initially approved sampling of surface soils and groundwater at the river bank. Later more careful review of planning documents identified the data gaps in the earlier Phase II and an email was sent on September 28th requesting that additional analyses be added to samples collected, if possible.
The only additional comment was to request that the selection of soil samples be based on highest PID reading and near the groundwater interface versus based on the two highest PID readings.
|
Keather McLoone |
| 9/29/2011 |
Update or Other Action |
Email communication with consultant. GRO and PAHs need to be looked at as COPCs and should be included in future sampling. Also suggested that samples be collected from highest PID and groundwater interface rather than just the two highest PID readings per borehole. Adding RRO was discussed. This is not required for this fuel type according to our Field Sampling Procedures Manual. |
Keather McLoone |
| 8/16/2012 |
Meeting or Teleconference Held |
Conducted a teleconference with Brian Evans (Big State Logistics) and his consultant (Lyle Gresehover; AK-Resources and Environmental Services (AK-RES)) for a status update on this site's characterization activities. It was decided that AK-RES would use a hand auger to install monitoring wells between the spill site and Matanuska River, rather than waiting for freeze-up. Mr Gresehover intends to install 3-4 wells by 1 October 2012. |
Richard Bernhardt |
| 10/1/2012 |
Update or Other Action |
Attempted to contact Mr. Gresehover (AK-RES) via e-mail on 7 Sep 2012 to request a work plan for site characterization and monitoring well installation. No reply as of 1 October (the target date for MW installation from our August teleconference). Called Mr. Gresehover and left a message, requesting an update. Followed up with an e-mail to RP and consultant. |
Richard Bernhardt |
| 10/4/2012 |
Site Visit |
Conducted a site visit to observed the terrain gradient between the Glenn Hwy & Matanuska River at the release site. Surface water does not collect between Hwy & river. Test pits remain from the original response effort... none contained surface evidence of petroleum contamination after the recent floods. Will speak with RP & consultant prior to monitoring well installation, which is expected to be described in a forthcoming work plan. |
Richard Bernhardt |
| 10/8/2012 |
Document, Report, or Work plan Review - other |
Received, reviewed, and revised a work plan for characterization of the release site this fall/winter. Awaiting updated work plan, showing modifications to sampling strategy, timing, and location. |
Richard Bernhardt |
| 10/9/2012 |
Update or Other Action |
Spoke with Lyle Gresehover (ARES consultant) and learned that two groundwater samples had been collected from two test pits last fall (Sept 2011) in the floodplain between the Glenn Highway reslease site and the Matanuska River. Three soil samples were also collected from the margins of the initial release area. A copy of TestAmerica's lab report, and a site map, showed that none of the test pits on the floodplain were located hydraulically downgradient from the release site. Consequently, none of the water samples contained detectable contaminant concentrations. Soil samples from the margins of the initial release contained DRO concentrations ranging from 1630 mg/Kg to 6170 mg/Kg. No other analytes were detected above Method Two MTG levels. |
Richard Bernhardt |
| 10/25/2012 |
Site Characterization Workplan Approved |
Approved revised work plan for the installation of monitoring wells and the sampling of soil, surface water, and groundwater. |
Richard Bernhardt |
| 10/30/2012 |
Site Visit |
Met ARES personnel (Lyle Gresehover and Dustin Stahl) onsite to observe groundwater & soil sampling and ensure conformance with workplan. Coordinated with ARES regarding final sample locations and helped with efforts to manually install monitoring well. Glacially deposited, oversized, river cobble impeded efforts to effectively dig monitoring well pits or drive well points. A vehicle-mounted rotory auger seems to be the only viable option for installing wells at this site. |
Richard Bernhardt |
| 1/5/2013 |
Site Visit |
Stopped by to see if the ice is capable of supporting the weight of an auger to install monitoring wells. Ice is buckling and has collapsed in several places near the banks. Pictures were e-mailed to RP/Consultant. |
Richard Bernhardt |
| 3/5/2013 |
Document, Report, or Work plan Review - other |
Received lab results for samples collected in October 2012. The highest contaminant concentration (and only exceedance of default ADEC cleanup levels) was for DRO at 494 mg/Kg. This sample was collected directly below the release area at the base of the roadside embankment. COCs were not detected in surface water samples from the Matanuska River or more than 15 ft. from the exceedance mentioned above. |
Richard Bernhardt |
| 3/6/2013 |
Update or Other Action |
Updated geocoordinates based on Google Earth imagery. |
Richard Bernhardt |
| 3/11/2013 |
Exposure Tracking Model Ranking |
A new updated ranking with ETM has been completed for source area 79050 based on samples collected in October 2012. The highest exposure category is now "De Minimis Exposure," and a closure letter will follow. |
Richard Bernhardt |
| 3/22/2013 |
Cleanup Complete Determination Issued |
Remediation efforts, physical processes, and natural attenuation have reduced the risk to the point that this site warrants closure. |
Richard Bernhardt |
