Site Report: Pedro Bay Former Dena'ina School

Site Name:	Pedro Bay Former Dena'ina School
Address:	Village of Pedro Bay, Pedro Bay, AK 99647
File Number:	2633.38.001
Hazard ID:	1860
Status:	Cleanup Complete - Institutional Controls
Staff:	IC Unit, 9074655229 dec.icunit@alaska.gov
Latitude:	59.783248
Longitude:	-154.098159
Horizontal Datum:	NAD83

We make every effort to ensure the data presented here is accurate based on the best available information currently on file with DEC. It is therefore subject to change as new information becomes available. We recommend contacting the assigned project staff prior to making decisions based on this information.

Site Chronology
IC / Closure Details
Documents
Associated Sites

Problems/Comments

Pedro Bay village administrators first contacted the department in mid-January 1993 with reports of diesel fuel odors in the school and the presence of an occasional sheen on the water at the shore of Lake Iliamna. ADEC involvement as state lead began in 1997. Historic fuel storage methods involved up to 500 drums stored in the playground area as evidenced by a 1972 aerial photograph. An addition to the 1954 school was later built over the area used to store drums. Spills have also occurred at the tank farm and the generator building. Soil and groundwater has been contaminated with benzene and DRO. Benzene contaminated groundwater had impacted the creek and Lake Iliamna. Both have been used for drinking water and subsistence fishing. Lead had also been found in past groundwater results above Table C levels. Lead-based paint was eliminated as a contaminant of concern during the 2009 Additional Site Characterization effort. Lake and Peninsula School District conducted a limited interim remedial action for soils at playground in 1995 in which about 4 cubic yards were removed. This was the first of 2 excavations that took place at this site to date (February 2009). In 1999, ADEC stockpiled additional excavated soil and installed groundwater remediation system to address POL seepage into water bodies. School drinking water had been reportedly obtained from Class C well at 160' below ground surface, located 100' upgradient from tank farm. Site structures were removed by 2007. Activities since 2007 include additional site characterization, corrective action, and planning and reporting documents for both.

Action Information

Action Date	Action	Description	DEC Staff
4/1/1993	Update or Other Action	(Old R:Base Action Code = CORR - Correspondence (General)). WDO was cc'd a copy of a letter from John Smart, U.S. Public Health Service, to Pedro Bay Village Council President Ben Foss, reporting on a February 10, 1993 investigation by PHS at the Pedro Bay School. The letter was dated March 8, 1993 and was received by WDO on April 1, 1993. The investigation was requested by Mr. Foss because residents were concerned about possible soil and water contamination from a fuel tank farm serving the school, and water contamination from the sewage disposal serving the school. the intake for the school water supply was (and at least until 4/23/93, is) located down slope from both possible contamination locations. Mr. Smart observed the improper use of an above-ground rubber hose connecting a fuel tank to the school power generation building and recommended in his letter that the hose should be properly and permanently installed. He also recommended that the village council continue to pursue investigation by ADEC of the fuel contamination, and should contact the Lake and Peninsula School District requesting evaluation and assistance with repair of the sewage system.	Former Staff
4/23/1993	Update or Other Action	(Old R:Base Action Code = RECN - Site Reconnaissance (CS)). WDO Environmental Specialist Bill Wright received a letter dated March 11th from Debi-Willson Jacko, village administrator, notifying him that community residents are concerned that the school site is unhealthy due to 1) diesel contamination of soils and resulting diesel fumes in the school; 2) a septic system too close to the drinking water source, and 3) an unsuitable drinking water supply (the lake) by virtue of its proximity to the contamination and sewage system.	Former Staff
4/30/1993	Site Added to Database	Benzene contamination.	Former Staff
4/30/1993	Update or Other Action	Diesel contamination.	Former Staff
6/16/1995	Site Ranked Using the AHRM	Initial ranking. Action code added because it wasn't when the site was originally ranked.	Ray Dronenburg
8/29/1997	Update or Other Action	ADEC reviewed and commented on report entitled "Pedro Bay School Environmental Site Assessment" by Platt Environmental, dated August 1997. Report commissioned by the Lake and Peninsula School District. ADEC requested additional information regarding the sampling event and the stock pile near tank farm. ADEC advised School District to address tank farm, determine if groundwater is contaminated, and states that natural attenuation of contaminated soils in playground area is not sufficient to address the problem.	Jim Frechione
8/31/1998	Site Characterization Workplan Approved	ADEC approved workplan for ADEC contractor, OASIS, to begin site assessment tasks. Soil and groundwater sampling conducted in five distinct areas investigated: Drum Storage Area, French Drain, Tank Farm, Creek adjacent to school, and School Crawl Space.	John Mazzitello
12/15/1998	Site Characterization Report Approved	"Final Site Assessment Report: Pedro Bay School" conducted by OASIS dated December, 1998. Potential sources of contamination were identified as a buried tank near the creek, partially buried drums in the vicinity of the French drain, and the existing tank farm. Report states that no evidence of POL contamination was measured in the school crawl space. DRO soil contamination evident in soil borings collected at the tank farm and generator building. DRO and benzene soil contamination also documented in the school playground area. Benzene concentrations exceed cleanup level in groundwater sample. All groundwater samples contain lead concentrations greater that the groundwater cleanup level. Report contains several remedial action recommendations.	John Mazzitello
4/29/1999	Update or Other Action	Lake and Peninsula School District's contractor, Platt Environmental, submitted report entitled "Pedro Bay School Heating Fuel Release Response Report", dated April 29, 1999. The report describes the discovery a POL release at the school's tank farm and the subsequent emergency response conducted by the school district.	John Mazzitello
8/6/1999	Interim Removal Action Approved	ADEC approved spending funds from the Response Account to accomplish site stabilization and the recovery of subsurface petroleum contaminated groundwater which migrated through the school playground soils and into the adjacent creek, also impacting Lake Iliamna with sheen. EMCON, ADEC contractor, began the design and implementation of a groundwater treatment system installed along the creek to recover and intercept benzene and DRO contaminated water.	Laura Noland
11/15/1999	Site Ranked Using the AHRM	Ranking updated based on 1998 and 1999 sampling data. Original ranking value = 63.	Laura Noland
11/17/1999	Cleanup Plan Approved	ADEC approved workplan submitted by ADEC contractor, EMCON, to begin remedial activities at the tank farm and the drum storage area. Additional site assessment work approved 7/12/99, when it became evident that the area of soil and groundwater contamination was greater than originally determined.	Laura Noland
2/4/2000	Update or Other Action	Receipt of Draft Interim Corrective Action Report prepared by Emcon.	Keather McLoone
4/24/2000	Update or Other Action	Receipt of Final Interim Corrective Action Plan by Emcon. Cover sheet and select pages two-hole punched and in brown binder labeled Small Reports.	Keather McLoone
6/7/2000	Update or Other Action	Receipt of Remedial Action Workplan prepared by Emcon for work to be conducted during 2000.	Keather McLoone
12/28/2000	Site Ranked Using the AHRM	Site reranked.	Former Staff
1/24/2001	Meeting or Teleconference Held	ADEC held a meeting with our current site contractor, IT to discuss site investigation/cleanup and budget status.	David Pikul
2/5/2001	Meeting or Teleconference Held	ADEC received a briefing meeting from IT from their weekend trip to the site.	David Pikul
2/8/2001	Update or Other Action	ADEC staff traveled to the site on 02-06-01 to observe site conditions.	David Pikul
2/26/2001	Meeting or Teleconference Held	Pre-site visit meeting with Shannon and Wilson.	David Pikul
2/28/2001	Meeting or Teleconference Held	ADEC staff (Dave Pikul, Mike Haars, and Jim Frechione) along with a representative from Shannon and Wilson (S&W) traveled to the site to assess site conditions, collect data necessary to come up with preliminary plan for a groundwater diversion system, and to meet with community members. Vince Webster from Lake and Peninsula School District (L&P) arrived on-site along with L&P's contracted industrial hygienist (EHS) during DEC's site visit. L&P have installed a permanent 5,000 cfm exhaust fan to ventilate the schools crawl space. Volumetric calculations for proper crawl space air exchange indicated that a 2,300 cfm fan was required. During DEC's site visit the ventilation system was operational and no hydrocarbon odors were noticed in the school or from the opening of the crawl space. EHS was on-site to perform follow-up air monitoring after system installation. Test results are expected next week. Once test results have been reviewed, ADEC will coordinate with staff from: EHS, Department of Labor, Department of Epidemiology, the State Fire Marshal, and the Village of Pedro Bay to assist L&P in evaluating the use of the school. Pedro Bay Village's environmental coordinator informed ADEC that the school building is being used for gym and computer class on a short-term (1-2 hours at a time) basis at this time. Seepage of groundwater was noticed again in the area behind the school (playground). L&P will be fencing off the playground, making it off-limits to students. Seepage from this and other areas converges near the creek. Disturbance of the creek sediments and soils between the creek and the playground resulted in the development of what appeared to be a petroleum sheen. A petroleum odor was noticed.	David Pikul
3/2/2001	Update or Other Action	Receipt of Dena'ina School Site Visit and Engineering Recommendations from Shannon & Wilson.	Keather McLoone
3/6/2001	Meeting or Teleconference Held	ADEC met with Wayne Dolezal of the ADF&G to get there buy-in on the groundwater diversion concept at the site. Wayne has no objection and there are no permits needed. Consideration of erosion control and situation fences will be needed.	David Pikul
3/16/2001	Update or Other Action	Receipt of Draft Corrective Action Report from IT.	Keather McLoone
4/3/2001	Update or Other Action	ADEC and Shannon and Wilson staff traveled to the site to meet with the community and to advance soil test pits along the route of the proposed water diversion system. Groundwater was not present in any of the test pits to a depth of seven feet below ground surface. A former surface water drainage system, installed years ago was discovered during test pit activities. MW-1 has been installed within the drainage ditch and is not providing groundwater data as water in the well is most likely surface water run off.	David Pikul
4/30/2001	Update or Other Action	Date of Indoor Air Quality Investigation - Indoor Air Quality Sampling Report by EHS-Alaska, Inc.	Keather McLoone
5/8/2001	Update or Other Action	ADEC received the report titled "Preliminary Assessment of Proposed Pedro Bay Dena'ina School Drainage System and Groundwater Sampling. MW-4 is the only well reporting groundwater data, others are surface water.	David Pikul
8/20/2001	Update or Other Action	Staff traveled to the site along with EHS Alaska to meet with the community and perform indoor air quality testing prior to students attending school for the fall session.	David Pikul
8/24/2001	Update or Other Action	ADEC received the results of the air testing. The only detection was in the crawl space. The sample was collected with the fan off to get worst case scenario. Looks like the fan will need to be on and air quality should be fine.	David Pikul
10/29/2001	Proposed Plan	Work Plan for Groundwater Treatment System Upgrades/Repairs and Installation of a Cover At The Soil Storage Cell, Dena'ina School, Pedro Bay, Alaska, NTP # 1820195018A Approved.	David Pikul
12/12/2001	Update or Other Action	Receipt of Draft Operation and Maintenance Manual for Pedro Bay School Remediation System.	Keather McLoone
12/18/2001	Meeting or Teleconference Held	Staff traveled to the site to attend a council meeting to discuss next spring/summer cleanup plans.	David Pikul
1/17/2002	Update or Other Action	ADEC completed review of the status report for the groundwater treatment system upgrade/repairs and installation of a cover at the soil storage cell.	David Pikul
5/2/2002	Meeting or Teleconference Held	ADEC held scoping meeting with contractor to discuss budget and rescope June activities.	David Pikul
5/30/2002	Meeting or Teleconference Held	ADEC met with contractor Shannon & Wilson RE: startup and redesign and modifications to the on-site groundwater system. Drive points and shallow test pits will be advanced and soil and water collected. Site work is scheduled for June 13.	David Pikul
8/13/2002	Update or Other Action	RFP issued to perform a multiphased pilot study of the remediation system. Task 1 as follows: Produce a work plan to conduct a pilot study. Using existing equipment and other parts as necessary, run on-site remedial systems in various configurations to determine the best remedial method for site cleanup. Methods include, but are not limited to, soil vapor extraction, air injection, air sparging and filtration of groundwater. Vertical PVC pipe(s) within the tank farm soils should be exposed and retrofit to allow for the collection of in-situ water for laboratory analysis for GRO, DRO and BTEX and to monitor vacuum created from running remedial systems. Components of the groundwater treatment system will require cleaning and maintenance. Electrical usage costs should be projected and included in the cost proposal. Several site visits are expected for systems operation and maintenance. Site work should be projected through system shutdown this field season. Remedial systems should be properly prepared and secured for winter. Start-up recommendations should be included in a final report to be generated under task three below.	David Pikul
10/16/2002	Update or Other Action	DEC contractors have been in the field at the school. Briefly, one of three site visits this fall has been completed. During this work DEC will be getting an idea of current contaminant status through water testing, and operation of the on-site systems to check performance. After the data gathering site visits are completed (about a month)DEC will compile the data and review system performance.	David Pikul
4/9/2003	Update or Other Action	DEC held a teleconference with DOE, Nathan Coffee. DOE does not responsible for the old school building and does not have funds for demolition. DOE would defer to Lake & Peninsula SD to deal with the building. Typically the DOE tries to give the buildings away. DOE leases the land from DNR who holds the land in trust for the future city of Pedro Bay. It is not likely that DNR would pay to demolish the building. Nathan suggested that the village’s trustee send a letter to the appropriate people to request funds if the village wants the building torn down. It will be a legislative appropriation. The Village Council will be having a meeting on Monday April 14 and will discuss the site and determine what they want to do with the building.	David Pikul
4/14/2003	Update or Other Action	DEC staff participated in a teleconference with Pedro Bay Village regarding site clean up. Discussions included identifying a suitable location to stage a land-spread/land farming operation for remediation of POL soil at the school property. Pedro Bay will look into potential locations. The presence of the school building and the generator shed are obstacles to clean up. Contamination has migrated under the generator shed which is situated at the toe of the ground slope from former tank farm. Clean up actions are limited as long as the generator shed remains. Pedro Bay will discuss its removal. Contamination has migrated under the school building. Clean up may proceed without removal of the old school building but will pose challenges. Due to the perpetual degradation of the building, Pedro Bay does not know if they want to keep the structure on the property. Clean up will be easier and less costly without the structures on property.	David Pikul
6/1/2003	Update or Other Action	Feasibility Testing report dated June 2003 by Shannon & Wilson. Purpose of work was to monitor groundwater and soil treatment systems to determine best mode of operating. Report also briefly discussed off-site ex situ bioventing and on-site landfarming or a combination of both as recommendations and included a rough order of magnitude cost for each approach.	Keather McLoone
2/19/2004	Update or Other Action	DEC staff communicated with Pedro Bay regarding site work. DEC can start to move soil from the tank farm area, but the generator shed will limit efforts, as well as the school building it self. The materials borrow pit was considered for landfarming/bioaugmentation area. If not this area, another area needs to be located to remediate the soil locally. Barging of soil or thermal treatment is not considered appropriate. Pedro Bay indicated interest in clean up of the property, however, no funds are available to assist with the on-site structures.	David Pikul
7/3/2006	Update or Other Action	ADEC issued a letter to Eddy Jeans, Director Department of Education & Early Development Division of School Finance. The letter outlined the site history and provided information related to the difficulties of site cleanup with the current structures on site.	David Pikul
2/5/2007	Update or Other Action	Site transferred to Shannon Oelkers.	Linda Nuechterlein
7/19/2007	Update or Other Action	Spoke with Rebecca Jensen from Pedro Bay Council. School building is still not in use, and is locked. Community aware of contamination and need for demolition of the building. She did not know if the sheen along the river observed in the past was still occuring.	Shannon Oelkers
7/19/2007	Update or Other Action	Confirmed with Drinking Water that new Dena'ina School has class C well, to 90 foot depth. The school is upstream and further than 1,0000 feet from the old school site and the contamination. Drinking water source is no longer surface water from Lake Illiamna. DW staff confirm that most residents of Pedro Bay use individual wells or haul water from surface sources. There is no community water service.	Shannon Oelkers
7/20/2007	Exposure Tracking Model Ranking	Site ranked using ETM.	Shannon Oelkers
7/27/2007	Update or Other Action	Site transferred from Oelkers to Frechione.	Shannon Oelkers
8/6/2007	Update or Other Action	I spoke with Don Carney (Dept of Education) regarding their plans for demolition of the school buildings. DOE acquired legislative funding to remove the school buildings and planned to contract with Illiamna Construction to demolish them during 2007. He wanted to know about underground pipes and contaminated soil. I told him that ADEC planned to follow up the building demolition with soil excavation and treatment. I told him that ADEC could address the underground pipes at the time of soil excavation but to ensure any demolition activities cap off pipes that are encountered. He thought the above ground tanks had already been removed. He indicated that he would keep me apprised of their progress.	Jim Frechione
1/7/2008	Update or Other Action	Site management changed to John Carnahan per Reuse and Redevelopment Initiative.	John Carnahan
1/9/2008	Update or Other Action	File ship to John Carnahan via Certified Return Receipt number 7006-0100-0004-5418-7311.	Alyce Hughey
3/12/2008	Meeting or Teleconference Held	A meeting was held with DCCED, DEED and Pedro Bay Village Council to discuss the proposed DEC-lead cleanup at the former school site. In attendance was Keith Jost, Kimberly Andrews, Ben Foss, and John Carnahan. Introductions were made, and a summary of the current status was discussed. The intent will be to complete excavation and removal of contaminated soil from the site to a location off site and near the landfill for the community. DCCED expressed strong desire to ensure adequate communication with the community on this project. It is our intent to establish significant benchmarks that will be forwarded officially to the Pedro Bay Village Council for resolution or comment.	John Carnahan
4/25/2008	Brownfields Award	FY 2009 SOA CIP funds $135,522 awarded to DCCED for CAP Development at Pedro Bay former BIA School. Contract # 18-9028-13. Current status: Transferred to Anchorage for long-term cleanup options. Site is closed.	Cascade Galasso-Irish
6/10/2008	Update or Other Action	Date of memo from Shannon & Wilson to document former Pedro Bay School site visit. Acknowledges that there are many data gaps and uncertainities at this time. DEC responded on 6/13/2008 with comments.	Keather McLoone
8/29/2008	Document, Report, or Work plan Review - other	Receipt of Draft Corrective Action Plan Former Pedro Bay School Site from Shannon & Wilson.	Keather McLoone
9/9/2008	Update or Other Action	Project Manager changed from John Carnahan to Keather McLoone. File will be transferred to Anchorage.	Linda Nuechterlein
11/13/2008	Update or Other Action	Confirmed with Helene Herndon of Iliamna Contractors that some of the building was burned during demolition. Confirmed with Kimberly Andrews of Department of Education that the building construction that took place in the 1980's was a remodel/addition to the original structure built in the 1950s.	Keather McLoone
12/8/2008	Update or Other Action	Recent discussions with stakeholders include discussion with Ben Foss regarding intended reuse scenario for site is a commercial/industrial reuse. Village and borough planning to develop site into barge landing/harbor area. Also discussed were potential groundwater restrictions at the site. These topics were also discussed with Keith Jost (CED - holds the land in trust until which time it can be turned over to the village) and Kimberly Andrews (DED -lessor).	Keather McLoone
1/22/2009	Meeting or Teleconference Held	Teleconference - Attendees: Linda N, Keather M, Kathy Atkinson – Division of Community and Regional Affairs (DCRA) – assists Keith Jost, Keith Jost – DCRA – Natural Resource Specialist, Ben Foss – Pedro Bay Village Council Secretary and Environmental staff, and John Balke – Pedro Bay Village Administrator. •Department of Education (DED) has a long-term lease, DCRA holds the land in trust for the future city of Pedro Bay. At this time Pedro Bay is a village and the land cannot be conveyed to Pedro Bay until they become a “city.” However, the village may use the property before becoming a city or having the land transferred to them. •The former school site is the preferred site of 2 being considered for a barge landing. There was a study that was conducted this winter in coordination with the borough. A report is anticipated as a result from this study which will likely recommend one site over the other. The village is anticipating that the former school site will be the site recommended as it has the deep water needed and the other site being considered, Smokehouse Bay, has some big drawbacks. Now that plans for addressing contamination at the site seem to be moving along, the former school site is likely to be seen as a viable prospect. It is anticipated that a design and possibly construction will move forward, in part with funding via the Denali Commission and that at least 2 years will pass before construction would begin. •Use of local equipment was discussed and we were requested to give them as much of a heads up as possible as they are likely to have other projects for this equipment but want to make it available for the former school project. Ben Foss also mentioned that some local residents had received HazWoper training and that it would be good if we could make use of that training and use local hire. •DEC plans to do early season characterization to address data gaps. Ben and John indicated that mid-May would be a good time to get started as that is typically when weather permits beginning gardening activities etc. •DEC hopes to return within a short time frame to begin addressing the onsite stockpile and other necessary site contamination issues later this summer based on early season results. •Commercial land use and groundwater use restrictions and potential landowner agreements were discussed and there were no objections raised. John stated that our approach sounded reasonable. •John asked if there would be groundwater monitoring conducted and we talked about how that would depend on future data and decisions about land use restrictions. Ben Foss indicated that there was a well reported on the adjacent property (other side of creek) owned by a seasonal resident who hadn’t use the property for a number of years. He could not locate the well and it was assumed to have been destroyed. •Ben asked how likely it was that we would dig down to 8 feet bgs (again) and find a bunch of contamination and then have the possibility of the project being stalled again. We explained that that is likely the smear zone and that we were planning on that being an area of focus with our characterization and potential remedial efforts. It was further discussed that this area is an unknown since we do not have current subsurface samples results, and is a data gap that needs to be addressed in the upcoming investigation. There were also questions about the creek barrier and migration to surface water issues were discussed. •Keith Jost indicated that DED should be contacted for permission to access the property and conduct planned activities and suggested a letter of non-objection sent by DEC for DED’s signature would be the timeliest way to gain that permission.	Keather McLoone
4/2/2009	Document, Report, or Work plan Review - other	Received draft plan for additional site characterization currently scheduled to be conducted mid-May. This workplan was forwarded to members of the Pedro Bay Village Council for their comment on April 6.	Keather McLoone
5/18/2009	Document, Report, or Work plan Review - other	Receipt of finalized workplan for addtional site characterization incorporating DEC and village council comments. Field effort scheduled to begin May 26th, 2009.	Keather McLoone
5/27/2009	Site Visit	DEC traveled to Pedro Bay to observe additional site characterization activities.	Keather McLoone
7/2/2009	Document, Report, or Work plan Review - other	Receipt of revised draft Corrective Action Plan on this date. Document was forwarded to Pedro Bay Village Council as well as property owner representative (DCCED) and Department of Ed (leaseholder).	Keather McLoone
7/10/2009	Update or Other Action	Email from Village Council indicating they had no negative comments regarding the draft CAP.	Keather McLoone
7/14/2009	Update or Other Action	Email from village council indicating that the onsite septic tank would be emptied before we return to begin implementation of the CAP and that dry deconned materials could be taken to the landfill.	Keather McLoone
8/10/2009	Document, Report, or Work plan Review - other	Receipt via email of final Corrective Action Plan.	Keather McLoone
9/10/2009	Update or Other Action	Shannon & Wilson and their subcontractor begin implementation of the Corrective Action Plan which included construction of an onsite landfarm, excavation of approximately 1,200 cubic yards of contaminated soil which was placed in the landfarm, installation of three monitoring wells, removal of septic and lift tanks, and groundwater sampling. Baseline sampling of soil placed in the landfarm was also conducted.	Keather McLoone
11/9/2009	Site Visit	DEC joined S&W and their subcontractor in a site visit to observe current landfarm conditions and meeting with the Pedro Bay Village Council.	Keather McLoone
1/26/2010	Document, Report, or Work plan Review - other	Date of final report on Additional Site Characterization.	Keather McLoone
4/18/2010	Document, Report, or Work plan Review - other	Date of receipt of Corrective Action Plan Implementation Draft Report.	Keather McLoone
5/3/2010	Site Visit	Shannon & Wilson geotechnical engineer traveled to Pedro Bay to evaluate landfarm stability in order to help ADEC address village council concerns.	Keather McLoone
5/18/2010	Document, Report, or Work plan Review - other	Date of receipt of finalized Corrective Action Plan Implementation report. This report covers the September 2009 CAP implementation which included excavation and confirmation sampling, landfarm construction and baseline sampling of the landfarm, as welll as monitoring well installation, development and sampling. This report also covers activities conducted during a November 2009 site visit which included groundwater sampling.	Keather McLoone
5/20/2010	Document, Report, or Work plan Review - other	Date of receipt of Results of Site Visit and Land Farm Stability Analysis report. The summary states "Based on our observations, we did not identify visual evidence of stability concerns at this time. We also conducted simplified slope stability and hydraulic analysis of the creek to identify potential concerns at the site. Based on our results, we did not identify a stability or hydrological concern."	Keather McLoone
11/4/2010	Document, Report, or Work plan Review - other	Date of receipt of Draft Corrective Action Monitoring report. In September 2010, S&W conducted sampling of the landfarm soils, groundwater wells, and surface water in accordance with the procedures documented in the Corrective Action plan. Average concentrations of DRO in the landfarmed soils have been reduced by 50 percent, no surface water exceedances. The groundwater results are similar to those in the previous two events if the duplicate sample DRO result for MW9 is used for comparison.	Keather McLoone
1/7/2011	Document, Report, or Work plan Review - other	Date of receipt of report on Corrective Action Monitoring.	Keather McLoone
4/26/2011	Site Visit	Travel to Pedro Bay to meet with Village Council and discuss project status and examine current conditions at onsite landfarm.	Keather McLoone
6/7/2011	Update or Other Action	Date of Email to ADEED and ACED with an status update as to the progress on the project.	Keather McLoone
8/19/2011	Document, Report, or Work plan Review - other	Date of receipt of work plan for additional monitoring of corrective action (and landfarm tilling).	Keather McLoone
3/13/2012	Exposure Tracking Model Ranking	A new updated ranking with ETM has been completed for source area 72838 Former School Tank Farm & Generator.	Keather McLoone
6/28/2012	Update or Other Action	Date of Email to ADEED and ACED with an status update as to the progress on the project.	Keather McLoone
8/30/2012	Update or Other Action	Date of Email to ADEED and ACED with an status update as to the progress on the project.	Keather McLoone
2/11/2013	Document, Report, or Work plan Review - other	Reviewed 2012 Corrective Action Monitoring Report for Former Pedro Bay Denaina School. Activities conducted in 2012 included sampling the landfarmed soil which had been tilled on eight occasions in 2011, and sampling and decommissioning the three remaining monitoring wells at the site. The landfarm was sampled by excavating ten test pits into the landfarm and underlying native soil. Soil samples collected from within the landfarmed soil contained DRO up to 1,840 mg/kg. Soil samples collected from native soil below the landfarm contained DRO up to 11,100 mg/kg, however the next highest concentration detected was 3,170 mg/kg. Groundwater samples were collected from the three monitoring wells in June and October 2012 and contained DRO from 1.53 mg/l to 12.8 mg/l. Following sampling activities, the landfarm was graded and compacted and the three monitoring wells were decommissioned. Groundwater contaminant concentrations appear to be generally stable.	Bill O'Connell
4/3/2013	Exposure Tracking Model Ranking	A new updated ranking with ETM has been completed for source area 72838 Former School Tank Farm & Generator.	Bill O'Connell
9/9/2013	Cleanup Complete Determination Issued	Contamination remains on site above established default cleanup levels; however ADEC has determined there is no unacceptable risk to human health or the environment. Therefore this site will be issued a Cleanup Complete- ICs determination subject to the following. 1. Any future change in land use may impact the exposure assumptions cited in this document. If land use and/or ownership changes, current ICs may not be protective and ADEC may require additional remediation and/or ICs. Therefore the Alaska Department of Commerce, Community, and Economic Development or Pedro Bay Village Council shall report to ADEC every three years to document land use, as soon as they become aware of any change in land ownership and/or use, if earlier. The report can be sent to the local ADEC office or electronically to DEC.ICUnit@alaska.gov. 2. A Notice of Environmental Contamination shall be recorded in the State Recorder’s Office that 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. 3. Installation of groundwater wells will require approval from ADEC. 4. Any buildings constructed at the site must incorporate a liner/vapor barrier to prohibit the potential migration of hydrocarbon vapors into the structure, unless otherwise approved by ADEC. 5. Any proposal to transport soil or groundwater off site requires ADEC approval in accordance with 18 AAC 75.325 (i). A “site” [as defined by 18 AAC 75.990 (115)] means an area that is contaminated, including areas contaminated by the migration of hazardous substances from a source area, regardless of property ownership. (See attached site figure.) 6. Movement or use of contaminated material in a manner that results in a violation of 18 AAC 70 water quality standards is prohibited.	Bill O'Connell
9/9/2013	Institutional Control Record Established	Institutional Controls established and entered into the database.	Bill O'Connell
12/30/2024	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

Action Date

Action

Description

DEC Staff

4/1/1993

Update or Other Action

(Old R:Base Action Code = CORR - Correspondence (General)). WDO was cc'd a copy of a letter from John Smart, U.S. Public Health Service, to Pedro Bay Village Council President Ben Foss, reporting on a February 10, 1993 investigation by PHS at the Pedro Bay School. The letter was dated March 8, 1993 and was received by WDO on April 1, 1993. The investigation was requested by Mr. Foss because residents were concerned about possible soil and water contamination from a fuel tank farm serving the school, and water contamination from the sewage disposal serving the school. the intake for the school water supply was (and at least until 4/23/93, is) located down slope from both possible contamination locations. Mr. Smart observed the improper use of an above-ground rubber hose connecting a fuel tank to the school power generation building and recommended in his letter that the hose should be properly and permanently installed. He also recommended that the village council continue to pursue investigation by ADEC of the fuel contamination, and should contact the Lake and Peninsula School District requesting evaluation and assistance with repair of the sewage system.

Former Staff

4/23/1993

Update or Other Action

(Old R:Base Action Code = RECN - Site Reconnaissance (CS)). WDO Environmental Specialist Bill Wright received a letter dated March 11th from Debi-Willson Jacko, village administrator, notifying him that community residents are concerned that the school site is unhealthy due to 1) diesel contamination of soils and resulting diesel fumes in the school; 2) a septic system too close to the drinking water source, and 3) an unsuitable drinking water supply (the lake) by virtue of its proximity to the contamination and sewage system.

Former Staff

4/30/1993

Site Added to Database

Benzene contamination.

Former Staff

4/30/1993

Update or Other Action

Diesel contamination.

Former Staff

6/16/1995

Site Ranked Using the AHRM

Initial ranking. Action code added because it wasn't when the site was originally ranked.

Ray Dronenburg

8/29/1997

Update or Other Action

ADEC reviewed and commented on report entitled "Pedro Bay School Environmental Site Assessment" by Platt Environmental, dated August 1997. Report commissioned by the Lake and Peninsula School District. ADEC requested additional information regarding the sampling event and the stock pile near tank farm. ADEC advised School District to address tank farm, determine if groundwater is contaminated, and states that natural attenuation of contaminated soils in playground area is not sufficient to address the problem.

Jim Frechione

8/31/1998

Site Characterization Workplan Approved

ADEC approved workplan for ADEC contractor, OASIS, to begin site assessment tasks. Soil and groundwater sampling conducted in five distinct areas investigated: Drum Storage Area, French Drain, Tank Farm, Creek adjacent to school, and School Crawl Space.

John Mazzitello

12/15/1998

Site Characterization Report Approved

"Final Site Assessment Report: Pedro Bay School" conducted by OASIS dated December, 1998. Potential sources of contamination were identified as a buried tank near the creek, partially buried drums in the vicinity of the French drain, and the existing tank farm. Report states that no evidence of POL contamination was measured in the school crawl space. DRO soil contamination evident in soil borings collected at the tank farm and generator building. DRO and benzene soil contamination also documented in the school playground area. Benzene concentrations exceed cleanup level in groundwater sample. All groundwater samples contain lead concentrations greater that the groundwater cleanup level. Report contains several remedial action recommendations.

John Mazzitello

4/29/1999

Update or Other Action

Lake and Peninsula School District's contractor, Platt Environmental, submitted report entitled "Pedro Bay School Heating Fuel Release Response Report", dated April 29, 1999. The report describes the discovery a POL release at the school's tank farm and the subsequent emergency response conducted by the school district.

John Mazzitello

8/6/1999

Interim Removal Action Approved

ADEC approved spending funds from the Response Account to accomplish site stabilization and the recovery of subsurface petroleum contaminated groundwater which migrated through the school playground soils and into the adjacent creek, also impacting Lake Iliamna with sheen. EMCON, ADEC contractor, began the design and implementation of a groundwater treatment system installed along the creek to recover and intercept benzene and DRO contaminated water.

Laura Noland

11/15/1999

Site Ranked Using the AHRM

Ranking updated based on 1998 and 1999 sampling data. Original ranking value = 63.

Laura Noland

11/17/1999

Cleanup Plan Approved

ADEC approved workplan submitted by ADEC contractor, EMCON, to begin remedial activities at the tank farm and the drum storage area. Additional site assessment work approved 7/12/99, when it became evident that the area of soil and groundwater contamination was greater than originally determined.

Laura Noland

2/4/2000

Update or Other Action

Receipt of Draft Interim Corrective Action Report prepared by Emcon.

Keather McLoone

4/24/2000

Update or Other Action

Receipt of Final Interim Corrective Action Plan by Emcon. Cover sheet and select pages two-hole punched and in brown binder labeled Small Reports.

Keather McLoone

6/7/2000

Update or Other Action

Receipt of Remedial Action Workplan prepared by Emcon for work to be conducted during 2000.

Keather McLoone

12/28/2000

Site Ranked Using the AHRM

Site reranked.

Former Staff

1/24/2001

Meeting or Teleconference Held

ADEC held a meeting with our current site contractor, IT to discuss site investigation/cleanup and budget status.

David Pikul

2/5/2001

Meeting or Teleconference Held

ADEC received a briefing meeting from IT from their weekend trip to the site.

David Pikul

2/8/2001

Update or Other Action

ADEC staff traveled to the site on 02-06-01 to observe site conditions.

David Pikul

2/26/2001

Meeting or Teleconference Held

Pre-site visit meeting with Shannon and Wilson.

David Pikul

2/28/2001

Meeting or Teleconference Held

ADEC staff (Dave Pikul, Mike Haars, and Jim Frechione) along with a representative from Shannon and Wilson (S&W) traveled to the site to assess site conditions, collect data necessary to come up with preliminary plan for a groundwater diversion system, and to meet with community members. Vince Webster from Lake and Peninsula School District (L&P) arrived on-site along with L&P's contracted industrial hygienist (EHS) during DEC's site visit. L&P have installed a permanent 5,000 cfm exhaust fan to ventilate the schools crawl space. Volumetric calculations for proper crawl space air exchange indicated that a 2,300 cfm fan was required. During DEC's site visit the ventilation system was operational and no hydrocarbon odors were noticed in the school or from the opening of the crawl space. EHS was on-site to perform follow-up air monitoring after system installation. Test results are expected next week. Once test results have been reviewed, ADEC will coordinate with staff from: EHS, Department of Labor, Department of Epidemiology, the State Fire Marshal, and the Village of Pedro Bay to assist L&P in evaluating the use of the school. Pedro Bay Village's environmental coordinator informed ADEC that the school building is being used for gym and computer class on a short-term (1-2 hours at a time) basis at this time. Seepage of groundwater was noticed again in the area behind the school (playground). L&P will be fencing off the playground, making it off-limits to students. Seepage from this and other areas converges near the creek. Disturbance of the creek sediments and soils between the creek and the playground resulted in the development of what appeared to be a petroleum sheen. A petroleum odor was noticed.

David Pikul

3/2/2001

Update or Other Action

Receipt of Dena'ina School Site Visit and Engineering Recommendations from Shannon & Wilson.

Keather McLoone

3/6/2001

Meeting or Teleconference Held

ADEC met with Wayne Dolezal of the ADF&G to get there buy-in on the groundwater diversion concept at the site. Wayne has no objection and there are no permits needed. Consideration of erosion control and situation fences will be needed.

David Pikul

3/16/2001

Update or Other Action

Receipt of Draft Corrective Action Report from IT.

Keather McLoone

4/3/2001

Update or Other Action

ADEC and Shannon and Wilson staff traveled to the site to meet with the community and to advance soil test pits along the route of the proposed water diversion system. Groundwater was not present in any of the test pits to a depth of seven feet below ground surface. A former surface water drainage system, installed years ago was discovered during test pit activities. MW-1 has been installed within the drainage ditch and is not providing groundwater data as water in the well is most likely surface water run off.

David Pikul

4/30/2001

Update or Other Action

Date of Indoor Air Quality Investigation - Indoor Air Quality Sampling Report by EHS-Alaska, Inc.

Keather McLoone

5/8/2001

Update or Other Action

ADEC received the report titled "Preliminary Assessment of Proposed Pedro Bay Dena'ina School Drainage System and Groundwater Sampling. MW-4 is the only well reporting groundwater data, others are surface water.

David Pikul

8/20/2001

Update or Other Action

Staff traveled to the site along with EHS Alaska to meet with the community and perform indoor air quality testing prior to students attending school for the fall session.

David Pikul

8/24/2001

Update or Other Action

ADEC received the results of the air testing. The only detection was in the crawl space. The sample was collected with the fan off to get worst case scenario. Looks like the fan will need to be on and air quality should be fine.

David Pikul

10/29/2001

Proposed Plan

Work Plan for Groundwater Treatment System Upgrades/Repairs and Installation of a Cover At The Soil Storage Cell, Dena'ina School, Pedro Bay, Alaska, NTP # 1820195018A Approved.

David Pikul

12/12/2001

Update or Other Action

Receipt of Draft Operation and Maintenance Manual for Pedro Bay School Remediation System.

Keather McLoone

12/18/2001

Meeting or Teleconference Held

Staff traveled to the site to attend a council meeting to discuss next spring/summer cleanup plans.

David Pikul

1/17/2002

Update or Other Action

ADEC completed review of the status report for the groundwater treatment system upgrade/repairs and installation of a cover at the soil storage cell.

David Pikul

5/2/2002

Meeting or Teleconference Held

ADEC held scoping meeting with contractor to discuss budget and rescope June activities.

David Pikul

5/30/2002

Meeting or Teleconference Held

ADEC met with contractor Shannon & Wilson RE: startup and redesign and modifications to the on-site groundwater system. Drive points and shallow test pits will be advanced and soil and water collected. Site work is scheduled for June 13.

David Pikul

8/13/2002

Update or Other Action

RFP issued to perform a multiphased pilot study of the remediation system. Task 1 as follows: Produce a work plan to conduct a pilot study. Using existing equipment and other parts as necessary, run on-site remedial systems in various configurations to determine the best remedial method for site cleanup. Methods include, but are not limited to, soil vapor extraction, air injection, air sparging and filtration of groundwater. Vertical PVC pipe(s) within the tank farm soils should be exposed and retrofit to allow for the collection of in-situ water for laboratory analysis for GRO, DRO and BTEX and to monitor vacuum created from running remedial systems. Components of the groundwater treatment system will require cleaning and maintenance. Electrical usage costs should be projected and included in the cost proposal. Several site visits are expected for systems operation and maintenance. Site work should be projected through system shutdown this field season. Remedial systems should be properly prepared and secured for winter. Start-up recommendations should be included in a final report to be generated under task three below.

David Pikul

10/16/2002

Update or Other Action

DEC contractors have been in the field at the school. Briefly, one of three site visits this fall has been completed. During this work DEC will be getting an idea of current contaminant status through water testing, and operation of the on-site systems to check performance. After the data gathering site visits are completed (about a month)DEC will compile the data and review system performance.

David Pikul

4/9/2003

Update or Other Action

DEC held a teleconference with DOE, Nathan Coffee. DOE does not responsible for the old school building and does not have funds for demolition. DOE would defer to Lake & Peninsula SD to deal with the building. Typically the DOE tries to give the buildings away. DOE leases the land from DNR who holds the land in trust for the future city of Pedro Bay. It is not likely that DNR would pay to demolish the building. Nathan suggested that the village’s trustee send a letter to the appropriate people to request funds if the village wants the building torn down. It will be a legislative appropriation. The Village Council will be having a meeting on Monday April 14 and will discuss the site and determine what they want to do with the building.

David Pikul

4/14/2003

Update or Other Action

DEC staff participated in a teleconference with Pedro Bay Village regarding site clean up. Discussions included identifying a suitable location to stage a land-spread/land farming operation for remediation of POL soil at the school property. Pedro Bay will look into potential locations. The presence of the school building and the generator shed are obstacles to clean up. Contamination has migrated under the generator shed which is situated at the toe of the ground slope from former tank farm. Clean up actions are limited as long as the generator shed remains. Pedro Bay will discuss its removal. Contamination has migrated under the school building. Clean up may proceed without removal of the old school building but will pose challenges. Due to the perpetual degradation of the building, Pedro Bay does not know if they want to keep the structure on the property. Clean up will be easier and less costly without the structures on property.

David Pikul

6/1/2003

Update or Other Action

Feasibility Testing report dated June 2003 by Shannon & Wilson. Purpose of work was to monitor groundwater and soil treatment systems to determine best mode of operating. Report also briefly discussed off-site ex situ bioventing and on-site landfarming or a combination of both as recommendations and included a rough order of magnitude cost for each approach.

Keather McLoone

2/19/2004

Update or Other Action

DEC staff communicated with Pedro Bay regarding site work. DEC can start to move soil from the tank farm area, but the generator shed will limit efforts, as well as the school building it self. The materials borrow pit was considered for landfarming/bioaugmentation area. If not this area, another area needs to be located to remediate the soil locally. Barging of soil or thermal treatment is not considered appropriate. Pedro Bay indicated interest in clean up of the property, however, no funds are available to assist with the on-site structures.

David Pikul

7/3/2006

Update or Other Action

ADEC issued a letter to Eddy Jeans, Director Department of Education & Early Development Division of School Finance. The letter outlined the site history and provided information related to the difficulties of site cleanup with the current structures on site.

David Pikul

2/5/2007

Update or Other Action

Site transferred to Shannon Oelkers.

Linda Nuechterlein

7/19/2007

Update or Other Action

Spoke with Rebecca Jensen from Pedro Bay Council. School building is still not in use, and is locked. Community aware of contamination and need for demolition of the building. She did not know if the sheen along the river observed in the past was still occuring.

Shannon Oelkers

7/19/2007

Update or Other Action

Confirmed with Drinking Water that new Dena'ina School has class C well, to 90 foot depth. The school is upstream and further than 1,0000 feet from the old school site and the contamination. Drinking water source is no longer surface water from Lake Illiamna. DW staff confirm that most residents of Pedro Bay use individual wells or haul water from surface sources. There is no community water service.

Shannon Oelkers

7/20/2007

Exposure Tracking Model Ranking

Site ranked using ETM.

Shannon Oelkers

7/27/2007

Update or Other Action

Site transferred from Oelkers to Frechione.

Shannon Oelkers

8/6/2007

Update or Other Action

I spoke with Don Carney (Dept of Education) regarding their plans for demolition of the school buildings. DOE acquired legislative funding to remove the school buildings and planned to contract with Illiamna Construction to demolish them during 2007. He wanted to know about underground pipes and contaminated soil. I told him that ADEC planned to follow up the building demolition with soil excavation and treatment. I told him that ADEC could address the underground pipes at the time of soil excavation but to ensure any demolition activities cap off pipes that are encountered. He thought the above ground tanks had already been removed. He indicated that he would keep me apprised of their progress.

Jim Frechione

1/7/2008

Update or Other Action

Site management changed to John Carnahan per Reuse and Redevelopment Initiative.

John Carnahan

1/9/2008

Update or Other Action

File ship to John Carnahan via Certified Return Receipt number 7006-0100-0004-5418-7311.

Alyce Hughey

3/12/2008

Meeting or Teleconference Held

A meeting was held with DCCED, DEED and Pedro Bay Village Council to discuss the proposed DEC-lead cleanup at the former school site. In attendance was Keith Jost, Kimberly Andrews, Ben Foss, and John Carnahan. Introductions were made, and a summary of the current status was discussed. The intent will be to complete excavation and removal of contaminated soil from the site to a location off site and near the landfill for the community. DCCED expressed strong desire to ensure adequate communication with the community on this project. It is our intent to establish significant benchmarks that will be forwarded officially to the Pedro Bay Village Council for resolution or comment.

John Carnahan

4/25/2008

Brownfields Award

FY 2009 SOA CIP funds $135,522 awarded to DCCED for CAP Development at Pedro Bay former BIA School. Contract # 18-9028-13. Current status: Transferred to Anchorage for long-term cleanup options. Site is closed.

Cascade Galasso-Irish

6/10/2008

Update or Other Action

Date of memo from Shannon & Wilson to document former Pedro Bay School site visit. Acknowledges that there are many data gaps and uncertainities at this time. DEC responded on 6/13/2008 with comments.

Keather McLoone

8/29/2008

Document, Report, or Work plan Review - other

Receipt of Draft Corrective Action Plan Former Pedro Bay School Site from Shannon & Wilson.

Keather McLoone

9/9/2008

Update or Other Action

Project Manager changed from John Carnahan to Keather McLoone. File will be transferred to Anchorage.

Linda Nuechterlein

11/13/2008

Update or Other Action

Confirmed with Helene Herndon of Iliamna Contractors that some of the building was burned during demolition. Confirmed with Kimberly Andrews of Department of Education that the building construction that took place in the 1980's was a remodel/addition to the original structure built in the 1950s.

Keather McLoone

12/8/2008

Update or Other Action

Recent discussions with stakeholders include discussion with Ben Foss regarding intended reuse scenario for site is a commercial/industrial reuse. Village and borough planning to develop site into barge landing/harbor area. Also discussed were potential groundwater restrictions at the site. These topics were also discussed with Keith Jost (CED - holds the land in trust until which time it can be turned over to the village) and Kimberly Andrews (DED -lessor).

Keather McLoone

1/22/2009

Meeting or Teleconference Held

Teleconference - Attendees: Linda N, Keather M, Kathy Atkinson – Division of Community and Regional Affairs (DCRA) – assists Keith Jost, Keith Jost – DCRA – Natural Resource Specialist, Ben Foss – Pedro Bay Village Council Secretary and Environmental staff, and John Balke – Pedro Bay Village Administrator. •Department of Education (DED) has a long-term lease, DCRA holds the land in trust for the future city of Pedro Bay. At this time Pedro Bay is a village and the land cannot be conveyed to Pedro Bay until they become a “city.” However, the village may use the property before becoming a city or having the land transferred to them. •The former school site is the preferred site of 2 being considered for a barge landing. There was a study that was conducted this winter in coordination with the borough. A report is anticipated as a result from this study which will likely recommend one site over the other. The village is anticipating that the former school site will be the site recommended as it has the deep water needed and the other site being considered, Smokehouse Bay, has some big drawbacks. Now that plans for addressing contamination at the site seem to be moving along, the former school site is likely to be seen as a viable prospect. It is anticipated that a design and possibly construction will move forward, in part with funding via the Denali Commission and that at least 2 years will pass before construction would begin. •Use of local equipment was discussed and we were requested to give them as much of a heads up as possible as they are likely to have other projects for this equipment but want to make it available for the former school project. Ben Foss also mentioned that some local residents had received HazWoper training and that it would be good if we could make use of that training and use local hire. •DEC plans to do early season characterization to address data gaps. Ben and John indicated that mid-May would be a good time to get started as that is typically when weather permits beginning gardening activities etc. •DEC hopes to return within a short time frame to begin addressing the onsite stockpile and other necessary site contamination issues later this summer based on early season results. •Commercial land use and groundwater use restrictions and potential landowner agreements were discussed and there were no objections raised. John stated that our approach sounded reasonable. •John asked if there would be groundwater monitoring conducted and we talked about how that would depend on future data and decisions about land use restrictions. Ben Foss indicated that there was a well reported on the adjacent property (other side of creek) owned by a seasonal resident who hadn’t use the property for a number of years. He could not locate the well and it was assumed to have been destroyed. •Ben asked how likely it was that we would dig down to 8 feet bgs (again) and find a bunch of contamination and then have the possibility of the project being stalled again. We explained that that is likely the smear zone and that we were planning on that being an area of focus with our characterization and potential remedial efforts. It was further discussed that this area is an unknown since we do not have current subsurface samples results, and is a data gap that needs to be addressed in the upcoming investigation. There were also questions about the creek barrier and migration to surface water issues were discussed. •Keith Jost indicated that DED should be contacted for permission to access the property and conduct planned activities and suggested a letter of non-objection sent by DEC for DED’s signature would be the timeliest way to gain that permission.

Keather McLoone

4/2/2009

Document, Report, or Work plan Review - other

Received draft plan for additional site characterization currently scheduled to be conducted mid-May. This workplan was forwarded to members of the Pedro Bay Village Council for their comment on April 6.

Keather McLoone

5/18/2009

Document, Report, or Work plan Review - other

Receipt of finalized workplan for addtional site characterization incorporating DEC and village council comments. Field effort scheduled to begin May 26th, 2009.

Keather McLoone

5/27/2009

Site Visit

DEC traveled to Pedro Bay to observe additional site characterization activities.

Keather McLoone

7/2/2009

Document, Report, or Work plan Review - other

Receipt of revised draft Corrective Action Plan on this date. Document was forwarded to Pedro Bay Village Council as well as property owner representative (DCCED) and Department of Ed (leaseholder).

Keather McLoone

7/10/2009

Update or Other Action

Email from Village Council indicating they had no negative comments regarding the draft CAP.

Keather McLoone

7/14/2009

Update or Other Action

Email from village council indicating that the onsite septic tank would be emptied before we return to begin implementation of the CAP and that dry deconned materials could be taken to the landfill.

Keather McLoone

8/10/2009

Document, Report, or Work plan Review - other

Receipt via email of final Corrective Action Plan.

Keather McLoone

9/10/2009

Update or Other Action

Shannon & Wilson and their subcontractor begin implementation of the Corrective Action Plan which included construction of an onsite landfarm, excavation of approximately 1,200 cubic yards of contaminated soil which was placed in the landfarm, installation of three monitoring wells, removal of septic and lift tanks, and groundwater sampling. Baseline sampling of soil placed in the landfarm was also conducted.

Keather McLoone

11/9/2009

Site Visit

DEC joined S&W and their subcontractor in a site visit to observe current landfarm conditions and meeting with the Pedro Bay Village Council.

Keather McLoone

1/26/2010

Document, Report, or Work plan Review - other

Date of final report on Additional Site Characterization.

Keather McLoone

4/18/2010

Document, Report, or Work plan Review - other

Date of receipt of Corrective Action Plan Implementation Draft Report.

Keather McLoone

5/3/2010

Site Visit

Shannon & Wilson geotechnical engineer traveled to Pedro Bay to evaluate landfarm stability in order to help ADEC address village council concerns.

Keather McLoone

5/18/2010

Document, Report, or Work plan Review - other

Date of receipt of finalized Corrective Action Plan Implementation report. This report covers the September 2009 CAP implementation which included excavation and confirmation sampling, landfarm construction and baseline sampling of the landfarm, as welll as monitoring well installation, development and sampling. This report also covers activities conducted during a November 2009 site visit which included groundwater sampling.

Keather McLoone

5/20/2010

Document, Report, or Work plan Review - other

Date of receipt of Results of Site Visit and Land Farm Stability Analysis report. The summary states "Based on our observations, we did not identify visual evidence of stability concerns at this time. We also conducted simplified slope stability and hydraulic analysis of the creek to identify potential concerns at the site. Based on our results, we did not identify a stability or hydrological concern."

Keather McLoone

11/4/2010

Document, Report, or Work plan Review - other

Date of receipt of Draft Corrective Action Monitoring report. In September 2010, S&W conducted sampling of the landfarm soils, groundwater wells, and surface water in accordance with the procedures documented in the Corrective Action plan. Average concentrations of DRO in the landfarmed soils have been reduced by 50 percent, no surface water exceedances. The groundwater results are similar to those in the previous two events if the duplicate sample DRO result for MW9 is used for comparison.

Keather McLoone

1/7/2011

Document, Report, or Work plan Review - other

Date of receipt of report on Corrective Action Monitoring.

Keather McLoone

4/26/2011

Site Visit

Travel to Pedro Bay to meet with Village Council and discuss project status and examine current conditions at onsite landfarm.

Keather McLoone

6/7/2011

Update or Other Action

Date of Email to ADEED and ACED with an status update as to the progress on the project.

Keather McLoone

8/19/2011

Document, Report, or Work plan Review - other

Date of receipt of work plan for additional monitoring of corrective action (and landfarm tilling).

Keather McLoone

3/13/2012

Exposure Tracking Model Ranking

A new updated ranking with ETM has been completed for source area 72838 Former School Tank Farm & Generator.

Keather McLoone

6/28/2012

Update or Other Action

Date of Email to ADEED and ACED with an status update as to the progress on the project.

Keather McLoone

8/30/2012

Update or Other Action

Date of Email to ADEED and ACED with an status update as to the progress on the project.

Keather McLoone

2/11/2013

Document, Report, or Work plan Review - other

Reviewed 2012 Corrective Action Monitoring Report for Former Pedro Bay Denaina School. Activities conducted in 2012 included sampling the landfarmed soil which had been tilled on eight occasions in 2011, and sampling and decommissioning the three remaining monitoring wells at the site. The landfarm was sampled by excavating ten test pits into the landfarm and underlying native soil. Soil samples collected from within the landfarmed soil contained DRO up to 1,840 mg/kg. Soil samples collected from native soil below the landfarm contained DRO up to 11,100 mg/kg, however the next highest concentration detected was 3,170 mg/kg. Groundwater samples were collected from the three monitoring wells in June and October 2012 and contained DRO from 1.53 mg/l to 12.8 mg/l. Following sampling activities, the landfarm was graded and compacted and the three monitoring wells were decommissioned. Groundwater contaminant concentrations appear to be generally stable.

Bill O'Connell

4/3/2013

Exposure Tracking Model Ranking

A new updated ranking with ETM has been completed for source area 72838 Former School Tank Farm & Generator.

Bill O'Connell

9/9/2013

Cleanup Complete Determination Issued

Contamination remains on site above established default cleanup levels; however ADEC has determined there is no unacceptable risk to human health or the environment. Therefore this site will be issued a Cleanup Complete- ICs determination subject to the following. 1. Any future change in land use may impact the exposure assumptions cited in this document. If land use and/or ownership changes, current ICs may not be protective and ADEC may require additional remediation and/or ICs. Therefore the Alaska Department of Commerce, Community, and Economic Development or Pedro Bay Village Council shall report to ADEC every three years to document land use, as soon as they become aware of any change in land ownership and/or use, if earlier. The report can be sent to the local ADEC office or electronically to DEC.ICUnit@alaska.gov. 2. A Notice of Environmental Contamination shall be recorded in the State Recorder’s Office that 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. 3. Installation of groundwater wells will require approval from ADEC. 4. Any buildings constructed at the site must incorporate a liner/vapor barrier to prohibit the potential migration of hydrocarbon vapors into the structure, unless otherwise approved by ADEC. 5. Any proposal to transport soil or groundwater off site requires ADEC approval in accordance with 18 AAC 75.325 (i). A “site” [as defined by 18 AAC 75.990 (115)] means an area that is contaminated, including areas contaminated by the migration of hazardous substances from a source area, regardless of property ownership. (See attached site figure.) 6. Movement or use of contaminated material in a manner that results in a violation of 18 AAC 70 water quality standards is prohibited.

Bill O'Connell

9/9/2013

Institutional Control Record Established

Institutional Controls established and entered into the database.

Bill O'Connell

12/30/2024

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

Contaminant Information

Name	Level Description	Media	Comments
DRO	> Human Health/Ingestion/Inhalation	Soil

Name

Level Description

Media

Comments

DRO

> Human Health/Ingestion/Inhalation

Soil

Control Type

Type	Details
Notice of Environmental Contamination	A Notice of Environmental Contamination shall be recorded in the State Recorder’s Office that 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.

Type

Details

Notice of Environmental Contamination

A Notice of Environmental Contamination shall be recorded in the State Recorder’s Office that 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.

Requirements

Description	Details
Advance approval required to transport soil or groundwater off-site.
Maintenance / Inspection Of Engineering Controls	Any building constructed at the site must incorporate a liner/vapor barrier to prohibit the potential migration of hydrocarbon vapors into the structure, unless otherwise approved by ADEC
Groundwater Use Restrictions	Installation of groundwater wells will require approval from ADEC

Description

Details

Advance approval required to transport soil or groundwater off-site.

Maintenance / Inspection Of Engineering Controls

Any building constructed at the site must incorporate a liner/vapor barrier to prohibit the potential migration of hydrocarbon vapors into the structure, unless otherwise approved by ADEC

Groundwater Use Restrictions

Installation of groundwater wells will require approval from ADEC

Institutional Controls Reminder Letter - December 2024

Recorded Deed Notice

Record of Decision

No associated sites were found.

Missing Location Data

Because the GIS location data for this site has not been entered, we cannot direct you to its position on the map. Click "Continue" to proceed to the Contaminated Sites Web Map or "Close" to return to the site report.

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Alaska Department of Environmental Conservation

Site Report: Pedro Bay Former Dena'ina School

Site Chronology

IC / Closure Details

Documents

Associated Sites

Problems/Comments

Action Information

Contaminant Information

Control Type

Requirements

Institutional Controls Reminder Letter - December 2024

Recorded Deed Notice

Record of Decision

Missing Location Data

State of Alaska Department of Environmental Conservation