| Action Date |
Action |
Description |
DEC Staff |
| 9/25/1991 |
Update or Other Action |
New Horizon letter to ADEC reporting contaminated soil encountered from above ground tank. Soil was excavated and stockpiled on site. |
Jim Frechione |
| 1/10/1992 |
Cleanup Level(s) Approved |
ADEC matrix score of 22 established a Level C cleanup value of 1000 ppm for DRO. |
Jim Frechione |
| 6/10/1992 |
Update or Other Action |
(Old R:Base Action Code = SA1 - Phase I Site Assessment (General)). |
Former Staff |
| 7/8/1992 |
Update or Other Action |
(Old R:Base Action Code = SA1R - Phase I SA Review (CS/LUST)). |
Former Staff |
| 5/6/1993 |
Site Added to Database |
|
Former Staff |
| 10/20/1993 |
Site Ranked Using the AHRM |
Initial ranking. |
Former Staff |
| 2/6/1995 |
Site Characterization Report Approved |
New Horizons report titled Interim Corrective Action Site Assessment received by ADEC and accepted. It describes biotreatment cells of excavated soil and in-situ soil remaining on hillside. |
Jim Frechione |
| 4/13/1995 |
Cleanup Plan Approved |
ADEC (Krieber) approves of corrective actions. |
Jim Frechione |
| 4/13/1995 |
Update or Other Action |
(Old R:Base Action Code = RARR - Remedial Action Report Review (CS)). The Department does not object to the proposed addition of fertilizer to the hillside and concurs with your recommendations that: 1) for areas which have received significant erosion, the soil be reinforced using man-made material and be reseeded; and, 2) that a barrier be erected to deter animal intrusion into this area. |
Mike Krieber |
| 1/5/1996 |
Update or Other Action |
Reviewed a corrective action progress report. |
Mike Krieber |
| 1/15/1997 |
Update or Other Action |
New Horizon requests closure of the three bioremediation cells based on sample results. |
Jim Frechione |
| 3/11/1997 |
Update or Other Action |
ADEC letter recognizing no further action is required on Cells 1-3. However, Cell 4 was not adequately assessed for closure purposes. |
Jim Frechione |
| 1/28/1998 |
Update or Other Action |
ADEC again requests additional assessment of Cell 4 and hill side area. |
Jim Frechione |
| 8/16/1999 |
Update or Other Action |
EPA report (prepared by Ecology and Enviroment) for preliminary assessment of the Sheep Mt. site. The report concluded that there was lack of documented use or release of hazardous substances (CERCLA) to warrant any EPA action. |
Jim Frechione |
| 2/27/2003 |
Update or Other Action |
Responsible Party field changed based on new information from PacificCorp Environmental Remediation Company. |
Elizabeth Stergiou |
| 5/27/2005 |
Update or Other Action |
Sent e-mail to Jeff Tiucker (PacifiCorp) requesting project status update and copies of any correspondence, reports, data subsequent ot Frechione's 28 Janyary 98 letter. |
Donald Seagren |
| 7/28/2005 |
GIS Position Updated |
Using Figure 1.2 from a Phase II Site Investigation, Sheep Mountain Repeater Site, from Woodward-Clyde, dated March 2, 1998, in conjunction with TopoZone Pro, entered the coordinates for this site. Metadata include USGS Topo Map 1:63K, TopoZone Pro Street Map, Black and White Aerial Photo, on a Medium Size Map, View Scale 1:48,000, Coordinate Datum NAD83. Medium to high degree of confidence in accuracy of location. |
Alyce Hughey |
| 8/1/2005 |
Update or Other Action |
E-mail response from Jeff Tucker. He is developing a work plan to investigate all areas of potential concern, as well as treatment cell 4 in the 1998 Woodward Clyde Phase II report. |
Donald Seagren |
| 8/1/2005 |
Update or Other Action |
Have not received a work plan. Sent e-mail inquiring on the status of development of the work plan. |
Donald Seagren |
| 8/15/2005 |
Streamlined Cleanup Program |
Reviewed Sit Characterization Work Plan and privided initil review comments via e-amil to PacifiCorp. Awaiting their response before finalizing comments and issuing conditional approval letter. |
Donald Seagren |
| 8/17/2005 |
Site Characterization Workplan Approved |
Approved revised Site Characterization Work plan. Suggested plugging and abandoning floor drains if no longer used/needed. Also suggested pumping and abandoning unused septic system. |
Donald Seagren |
| 9/21/2005 |
Update or Other Action |
Telephone call with Rick Poll, field project manager. They requested approval to transport increased volume of PCS to ASR in Anchorage for thermal treatment. Approval granted and ASR notified. Final volume is not determined at this point. Due to 7 years passing since the WCC assessment report, the site is overgrown. They are having trouble locating some of the sampling locations. I told them to do the best they could in locating the sites through visual, organoleptic, field screening and sampling to assess the current conditions. They need to have enough documentation to justify eliminating sampling locations from further consideration. |
Donald Seagren |
| 8/11/2006 |
Site Characterization Report Approved |
Reviewd 05 site characterization report. areas of he site have petroleum soil contamiantion (primarily DRO/RRO/some Benzene) remaining, usuall at depth. There were some problems with the procedures and interpretation of number of samples requied in the report. But, the problems do not affect the data and conclusions. Post treatment analytical data need to be submitted. Due to the remoteness of the location and low risk to human health & the environment, a conditional closure may be suitable.. Further review and discussion with the RP and management required before making a decision. |
Donald Seagren |
| 8/25/2006 |
Site Characterization Workplan Approved |
approve 2006 Site Investigation Work Plan. The work plan will fill in dtagaps to be used in the development of an appropriate remediation plan and CAP. |
Donald Seagren |
| 4/9/2007 |
Exposure Tracking Model Ranking |
|
Donald Seagren |
| 5/1/2007 |
Update or Other Action |
reviewed 2006 Sinte Investigation Report dated March 07. this investigation further identified and refined existing data. sufficient data is now avaiable to evaluate cleanup levles and develop a site specific cleanup plan. there is no evidence of significant groundwater within 70 feet of the ground surface. it is likely tha tthe depth to Gw is greater than 100 feet. |
Donald Seagren |
| 3/7/2008 |
Site Characterization Workplan Approved |
Approved 2008 Interim Soils Remediation Work Plan dated March 2008. EExcavateed soils will be transported to ASR for thermal remediation. |
Donald Seagren |
| 6/12/2008 |
Update or Other Action |
Site transferred from Don Seagren to Paul Horwath per Linda Nuechterlein. |
Alyce Hughey |
| 5/11/2010 |
Meeting or Teleconference Held |
Meeting with AT&T Inc., ALTA Geosciences and ADEC staff (Paul Horwath and Alyce Hughey) to discuss the Work Plans for the 2010 field season and any project updates. |
Alyce Hughey |
| 8/5/2011 |
Exposure Tracking Model Ranking |
A new updated ranking with ETM has been completed for source area 72227 Misc releases. |
Alyce Hughey |
| 5/18/2012 |
Meeting or Teleconference Held |
Meeting with Paul Horwath, Alex Tula with ALTA GeoSciences and Larry Bamberger with AT&T at the Soldotna ADEC office to discuss the information needed for issuance of a Cleanup Complete Determination with Institutional Controls. |
Alyce Hughey |
| 5/10/2013 |
Cleanup Complete Determination Issued |
A Cleanup Complete Determination with Institutional Controls has been issued. From 1998 to 2010 nineteen areas of interest (AOI) were identified, investigated, sampled, and/or underwent cleanup work efforts. Following the cleanup work, three AOI exceeded the target soil cleanup level for DRO of 5,000 mg/kg and two AOI exceeded the ADEC Table B2 Method Two Under 40-inch zone ‘ingestion’ soil cleanup level for DRO of 10,250 mg/kg. The three (3) areas exceeding the “target” soil cleanup level, as well as the two (2) areas exceeding ADEC’s ‘ingestion’ and ‘inhalation’ soil cleanup levels are depicted on FIGURE 1.4 Site Map, Attachment B. All other areas of interest were either non-detect for petroleum hydrocarbon contamination or concentrations were below the “target” soil cleanup level; therefore no further remedial action will be required within those AOI. Contamination remains on site above the established “target” soil cleanup level; however, ADEC has determined there is no unacceptable risk to human health or the environment, conditioned on compliance with the following site specific institutional controls. Any future change in land use may impact the exposure assumptions cited in this document. If land use and/or ownership changes, the current land owner shall report these changes to ADEC within 14 days, as these ICs may no longer be protective and ADEC may require additional remediation and/or ICs. In addition, Alascom, Inc. dba AT&T Alaska, shall investigate and report the current land use to ADEC every five (5) years, or report as soon as becoming aware of any change in land ownership and/or use, if earlier. The Notice of Environmental Contamination (NEC) shall be signed, notarized, and then recorded in the Palmer, Alaska Department of Natural Resources Land Recorder’s Office. This NEC identifies the nature and extent of contamination at the property and any conditions that the owners and operators are subject to, in accordance with this decision document. Alascom, Inc. dba AT&T Alaska, must submit a copy of this stamped and recorded NEC to ADEC after the document has been filed and recorded. The most recent (2006 and 2010) soil sample analytical data provided to ADEC reported DRO exceeding the applicable ADEC soil cleanup level. In addition DRO exceeded the ADEC ‘ingestion’ and ‘inhalation’ soil cleanup levels, within each of the two AREAS OF CONCERN identified on FIGURE 1.4 Site Map (see Attachment B). Any proposal to excavate, transport, move, treat, and/or dispose of soil located within each of the two AREAS OF CONCERN requires prior ADEC notification and approval. An environmental site assessment, performed by a qualified environmental consultant, will be required. If contaminated soils are encountered, they must be managed and disposed in accordance with regulations applicable at that time. Diesel range organic contamination remained in soil at concentrations exceeding the established “target” cleanup level of 5000 mg/kg DRO at three (3) additional sampling locations, in addition to the two AREAS OF CONCERN exceeding ADEC ‘ingestion’ and ‘inhalation’ soil cleanup levels (identified on the attached FIGURE 1.4 Site Map). These three locations are also identified on Attachment B, FIGURE 1.4 Site Map. Soil from these three locations may not be transported or moved off this property without prior ADEC notification and approval. It must be characterized and managed following regulations applicable at that time. |
Paul Horwath |
| 5/16/2013 |
Institutional Control Record Established |
Institutional Controls established and entered into the database. |
Paul Horwath |
| 11/7/2014 |
Institutional Control Compliance Review |
IC compliance review conducted and staff changed from Paul Horwath to IC Unit. Reminder system set to follow-up with the responsible party in 2018. |
Kristin Thompson |
| 3/10/2015 |
Institutional Control Update |
Found the recorded deed notice saved in the site's electronic file and attached in the database. |
Kristin Thompson |
| 3/7/2019 |
Institutional Control Compliance Review |
IC compliance review conducted and a reminder letter regarding the site conditions was issued to the Environmental, Health, and Safety office at AT&T. The next compliance review will be conducted in five years time. |
Evonne Reese |
| 5/16/2024 |
Institutional Control Compliance Review |
IC compliance review completed on this date. An IC reminder letter was issued to the landowner. The next review will be in five years’ time |
Gaige Robinson |
