| Action Date |
Action |
Description |
DEC Staff |
| 11/2/2005 |
Site Added to Database |
Site information was sent to PERP, transferred immediately to CS. |
Former Staff |
| 11/2/2005 |
Update or Other Action |
Reviewed phase I and phase II site assessments and updated problem and comment fields. Sent PRP letter to Pruhs Real Estate Group. |
Kim DeRuyter |
| 11/2/2005 |
Site Ranked Using the AHRM |
Site ranking driven by benzene exceeding MCLs at the tap. However, the SA states that iron content in the water makes it unpalatable and is likely not a drinking water source. |
Kim DeRuyter |
| 11/2/2005 |
GIS Position Updated |
Used TopozonePro and site maps, included aerial photos in file; fair degree of confidence in accuracy. |
Kim DeRuyter |
| 12/12/2005 |
Update or Other Action |
Received call from David Pruhs, to discuss PRP letter and groundwater sampling. David will forward information requested in the letter in January after meeting with his father Don Pruhs, the previous owner of the site. |
Kim DeRuyter |
| 12/23/2005 |
Update or Other Action |
Distributed Fact Sheet and cover letter explaining that benzene contamination has been found in 3 wells (Warehouses 4,5 and 6). The source of the contamination has not been determined. Warehouse #1 has waste oil drums stored on the property and could be contributing to the groundwater contamination.
Don said the floor drains in the Midnight Sun Fleet repair Warehouse were never connected to the septic system, they were connected to a 2" pipe. |
Kim DeRuyter |
| 1/4/2006 |
Update or Other Action |
Received call from Don Pruhs; he received the PRP letter yesterday. Mr. Pruhs agreed to send the requested information, and to hire an Environmental Contractor to characterize the site. We discussed closing the remaining floor drains, and replacing the heating oil tanks, potentially with natural gas which is supplied to Warehouse #3. We also discussed the possibility that the benzene may be from an offsite source. Mr. Pruhs verified that the wells were only about 20 feet deep. |
Kim DeRuyter |
| 1/11/2006 |
Meeting or Teleconference Held |
Met with Sheldon Shaw from Soils Alaska to discuss the Phase II Site Assessment and future site characterization efforts. |
Kim DeRuyter |
| 1/24/2006 |
Update or Other Action |
Received drinking water sample results from Warehouse 5-8 and Dee Thornells Veterinary Clinic. The Clinic and Warehouse 7 and 8 were non-detect for all analytes. Warehouse 4, 5, and 6 contain benzene above the cleanup level ranging from 10-16 ug/L. |
Kim DeRuyter |
| 2/6/2006 |
Update or Other Action |
Received phone call from Don Pruhs, he will be in town in March, and would like to discuss a less costly alternative to site characterization than the 6 permenant monitoring wells proposed by his consultant. Don stated that the Midnight Sun floor drains were connected to a pipe which drained to the surface, not to the septic system. |
Kim DeRuyter |
| 3/1/2006 |
Meeting or Teleconference Held |
Met with Don and Dave Pruhs to discuss the site cleanup process. They would like to do as much of the soil excavation work as possible. I explained that an ADEC qualified person needed to oversee the site assessment and remediation process. We discussed using temporary push points to collect soil and groundwater samples to delineate the source of the plume, and consider installing permenant monitoring wells at a later date. Don provided some site history which indicated that surface staining from Warehouse #1 was likely the source of the benzene in the groundwater. A former Hydraulic Repair shop in Warehouse #3, and the Auto Glass shop in Unit #4 could be potential sources. They plan to collect samples from the remaining 3 warehouse drinking water wells this spring and work with a consultant to further delineate the contamination this summer. Don worked with EPA to close the floor drains in 1988, however some tenants may have reconnected them. Unit #1 floor drains connected to a pipe to surface soil. The pipe was plugged in 1988, but may have been re-opened at a later date. |
Kim DeRuyter |
| 5/5/2006 |
Meeting or Teleconference Held |
Met with the FNSB Assessor to discuss the site. The Borough was reviewing the property value in relation to the groundwater contamination at the request of John McCoy. |
Kim DeRuyter |
| 7/19/2006 |
Meeting or Teleconference Held |
Met with Dave Pruhs and Brian Borjesson to discuss plans for further site characterization. A phased approach to determine if offsite sources were impacting the Warehouse complex was discussed. Mr. Borjesson had not previously reviewed the file, and requested a copy of the phase II report which was forwarded to him the following day. |
Kim DeRuyter |
| 8/21/2006 |
Update or Other Action |
Received an abreviated workplan, responded with comments on 8/25/06. |
Kim DeRuyter |
| 7/11/2007 |
Update or Other Action |
No work has been completed on the site since fall 2006. The adjacent Kobuk facility is being assessed and tanks have been removed. The Kobuk facility, however, is believed to be downgradient or cross-gradient of the Pruhs property so an unlikely source of contamination of the drinking water wells. An assessment of the sources on the Pruhs property are necessary as well as the potential for off-site migration.
John McCoy, the current owner of unit #4 through #8, called asking the current status of the site. Dave and Judy Somers own units #1-3. |
Ann Farris |
| 7/13/2007 |
Update or Other Action |
Changed project manager from Jim frechione to Ann Farris. Conducted site visit to assess current land use and ongoing activities. |
Ann Farris |
| 8/24/2007 |
Update or Other Action |
Spoke with David Pruhs today to get an history on the site and current status. He was awaiting the results of the Kobuk site assessment and then wanted to contact an environmental consultant to see where to go from here. I indicated I could get him the results of the Kobuk site assessment and I sent him a partial list of consultants that are located in Fairbanks. He indicated he would come by next week to pick up the Kobuk information. |
Ann Farris |
| 9/10/2007 |
Update or Other Action |
Staff met with David Pruhs to discuss the site and the adjacent property, Kobuk Feed and Fuel. I gave him a copy of the latest report from the Kobuk tank removal, but indicated that I thought it was extremely unlikely that contamination was migrating to his property from the Kobuk property, which is downgradient. He said he was going to have the water wells on site resampled and hire a environmental consultant to investigate the rest of the site with a direct push rig. |
Ann Farris |
| 12/5/2007 |
Update or Other Action |
Staff contacted Mr. Pruhs. He indicated he has contacted Hoefler Engineering to conduct a release investigation in the summer of '08. The approximate schedule is collect drinking water well samples again in Feb. 08, submit a workplan to DEC by early April, begin field work in May using direct push technology. |
Ann Farris |
| 5/14/2008 |
Update or Other Action |
Staff met with the RP and his consultants to discuss the necessary work. The plan is to collect another round of samples from the drinking water wells in May and send me the preliminary results. Wells will be sampled for BTEX, napthalene, and DRO. Additionally they will put together a work plan for excavation and sampling of the drum storage area on Midnight Sun Fleet Repair where there is obvious staining. This work will be done in July or August. |
Ann Farris |
| 5/14/2008 |
Exposure Tracking Model Ranking |
Initial ranking with ETM completed. |
Ann Farris |
| 9/11/2008 |
Update or Other Action |
Staff received results from drinking water well at buildings 4,5,6 and soil sampling at Bldg. 1, the Midnight Sun Fleet Repair. Drinking water well results were 9.32 ppb benzene to 16.8 ppb. There were low levels of DRO (less than 0.44 mg/L) The highest concentration was in the further east well, at bldg. 6. The soil results were from surface samples and had significant diesel and residual range organic concentrations. The soil results are consistent with the waste oil burning operations and drum storage that was reported there, but do not appear to be the source of the benzene in the groundwater. Additionally staff reviewed work from the Kobuk side, located to the west of industrial park. Looking at all of the information and the area hydrology, there is no evidence that Kobuk is the source of the contamination on the industrial park. |
Ann Farris |
| 10/30/2008 |
Update or Other Action |
Staff met with the RP's consultant and discussed the options for work at the site. The soil at the Midnight Sun Fleet Repair site does not appear to be the source of contamination in the drinking water wells so additional investigation is needed or institutional controls need to be established to prohibit use of the groundwater for drinking water. Additionally the soil should be treated at the Midnight Sun Fleet repair and a sample from the drinking water well at "Used-a-Bit" should be sampled. The current owner of the property would like to connect city water and is willing to work out something with the RP. The owner is unwilling to accept the IC without another water source. There was no resolution at this meeting. Staff will contact the RP with a formal letter lining out the options at the site. |
Ann Farris |
| 4/29/2009 |
Update or Other Action |
Staff sent a letter to responsible party inquiring about their plans for addressing the contamination in the soil and groundwater. A response is due by June 30, 2009 and if not received by that date, the State will assume the RP is unwilling and will proceed accordingly. |
Ann Farris |
| 7/10/2009 |
Meeting or Teleconference Held |
Staff met with Dana and Dave Pruhs and John McCoy. They plan to take the following steps:
Sample the downgradient drinking water well.
Discuss the water source options with Mr. McCoy.
Place signs in the building indicating it is not potable.
Excavate and burn soil from drum storage area on Midnight Sun Fleet Repair.
|
Ann Farris |
| 10/15/2009 |
Update or Other Action |
received sample results from a downgradient drinking water well. There was 3.5 ug/L benzene in the well, indicating potential offsite migration from the Pruh’s property. Staff will work with Pruhs to get further site characterization on the downgradient edge of the property. |
Ann Farris |
| 3/30/2010 |
Meeting or Teleconference Held |
Met with David Pruhs (and teleconf. with Dana Pruhs) concering remaining actions to be completed; I will provide an updated letter of recommendations. Also gave David a list of qualified environmental professionals to complete a workplan for this coming summer work season. |
Jim Fish |
| 7/6/2010 |
Update or Other Action |
Consultant correspondence to discuss pending work plan to be sent soon for reveiw |
Jim Fish |
| 8/25/2010 |
Document, Report, or Work plan Review - other |
Received workplan for additional site characterization and remedial action |
Jim Fish |
| 8/31/2010 |
Meeting or Teleconference Held |
Discussed work plan and site issues with consultant: Stained soil area identified for excavation is not yet fully characterized, and groundwater issues may not be resolved with only two temporary well points. Written comments will be provided to consultant. |
Jim Fish |
| 9/27/2010 |
Site Characterization Workplan Approved |
Final Work Plan for 2010/11 field seasons approved; Temporary groundwater wells will be installed & sampled 14-22 October, 2010. Soil excavation will take place during summer, 2011. |
Jim Fish |
| 1/3/2011 |
Document, Report, or Work plan Review - other |
Received Technical Memorandum from consultant reporting results of two ground water samples (plus one duplicate) collected from temporary well points. Benzene found at 1.87 ug/L and 0.2 ug/L, while TEX was non-detect. Water supply for Buildings 4,5,& 6 to be installed during summer 2011; and soil excavation near building 1 to completed during summer 2011. |
Jim Fish |
| 8/10/2011 |
Offsite Soil or Groundwater Disposal Approved |
Soil disposal via thermal remediation (OIT) approved |
Jim Fish |
| 4/3/2012 |
Document, Report, or Work plan Review - other |
Received report for 2011 field activities (soil excavation & drinking water supply tanks installed; wells decomissioned). |
Jim Fish |
| 10/24/2012 |
Update or Other Action |
Letter sent to Pruhs & consultant asking for installation of permanent groundwater monitoring wells, periodic groundwater sampling to understand contaminant transport & concentration trends, demonstration that contamination is not moving off-site to Used-A-Bit, recording an NEC on property deed, and establishing institutional controls to prevent on-site groundwater use for domestic purposes and DEC notification prior to new groundwater wells being installed or soils being moved. |
Jim Fish |
| 7/8/2016 |
Exposure Tracking Model Ranking |
A new updated ranking with ETM has been completed for source area 75105 drum storage or USTs. |
Shawn Tisdell |
| 8/23/2016 |
Update or Other Action |
Letter sent to Pruhs indicating that additional evaluation of the risk of exposure to groundwater contamination and vapor intrusion is needed. Contaminated groundwater may be moving off the property and affecting a down gradient supply well. Vapor intrusion potential also needs to be assessed to determine if it also is an exposure risk. A response deadline of September 20, 2016 was requested on the letter. |
Shawn Tisdell |
| 8/30/2016 |
Meeting or Teleconference Held |
DEC project manager received call from PRP indicating that the Pruhs Trust no longer exists. They are wondering how to get this closed. The PRP indicated that he does not feel they are responsible for site contamination. A meeting was requested to discuss how to proceed. |
Shawn Tisdell |
| 9/14/2016 |
Meeting or Teleconference Held |
A call was received by the DEC project manager from another PRP representative. The previous RP Trust is spent out. A meeting will be helpful to discuss PRP concerns and more details on what the DEC needs to consider the site for closure. |
Shawn Tisdell |
| 10/26/2016 |
Meeting or Teleconference Held |
A meeting was held with CS staff, the landowner and other interested parties. Topics discussed include PRP identification, historical background of the site and nearby properties, and additional investigative work that is needed to consider the site for closure. The trust fund used to cover site cleanup costs is exhausted and new RPs will need to be determined. A source area and plume delineation of the benzene contamination have not been adequately defined and will require additional investigation. |
Shawn Tisdell |
| 3/15/2017 |
Potentially Responsible Party/State Interest Letter |
A potentially responsible party notification letter has been sent to the current site landowner. A phone call was also made to notify the landowner of this decision. |
Shawn Tisdell |
| 5/2/2017 |
Update or Other Action |
Letter sent to RP requesting sampling of the drinking water well for VOCs at 2750 Picket Place (Used-a-Bit). Once it is demonstrated that contamination in the Used-a-Bit well is no longer a concern, or that it is not a result of groundwater contamination migrating from the Lot 1 property, ADEC will evaluate the contaminated site for a closure decision. |
Shawn Tisdell |
| 4/26/2019 |
Exposure Tracking Model Ranking |
A new updated ranking with ETM has been completed for source area 75105 Septic leach field. |
Shawn Tisdell |
| 5/3/2019 |
Cleanup Complete Determination Issued |
Dissolved petroleum contamination remains in groundwater above levels suitable for unrestricted future use; however ADEC has approved alternative points of compliance for groundwater and the use of institutional controls to limit future exposure to human health or the environment. The closure document is available online on the Pruhs Industrial site report page in the Alaska Spill Prevention and Response Contaminated Sites database. |
Shawn Tisdell |
| 5/3/2019 |
Institutional Control Record Established |
Institutional Controls established and entered into the database. |
Shawn Tisdell |
