Site Report: Dutch Hbr-Rocky Point Tank Hill

Site Name:	Dutch Hbr-Rocky Point Tank Hill
Address:	East Point Road, Unalaska, AK 99685
File Number:	2542.38.018
Hazard ID:	509
Status:	Active
Staff:	Sarah Bernhardt, 9072697527 sarah.bernhardt@alaska.gov
Latitude:	53.886960
Longitude:	-166.531155
Horizontal Datum:	WGS84

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

Diesel fuel, jet fuel, gasoline and bunker "C" from fuel spills associated with current operations and dating back to World War II have contaminated soil, groundwater and ponds in the area. Petroleum sheen used to discharge into Iliuliuk Bay near the APL dock before the dock area was expanded in 1994 and a sheet-pile bulkhead was built. Product/sheen is visible in the ditch along East Point Road during and after significant rainfall events. This site falls within Rocky Point Management Area #1, which is a shared responsibility (multiple potentially responsible party (PRP)) site involving the US Army Corps of Engineers (because it is a formerly used defense site (FUDS)), Chevron and Delta Western Fuels. Bruce Erickson, Mike Lewis and Jennifer Roberts are former site managers. The military built Dutch Harbor Naval Operating Base including large tank farms and fuel distribution systems during World War II. Executive order (EO) 8786 dated June 14, 1941 revoked releasing lands to public domain and after the war the federal government continued to own the property until 1974. During this time it leased the fuel facilities to Standard Oil and Chevron. In 1975 the surface rights and facilities were transferred to the Ounalashka Corporation (OC) and subsurface rights went to the Aleut Corp. OC continued to lease the fuel system related portions of the site to Chevron and later Delta Western. American President Lines currently lease portions of the former NOB from the OC. See also Reckey 1981260113501 "DOT/PF Dutch Harbor airfield" and Reckey 1988260107101 "Delta Western Bulk Plant - Dutch Harbor", which consists of six above ground fuel tanks on top of Tank Hill. This site consists of four large (~ 1 million gallons each) concrete underground fuel storage tanks. These tanks area located between two bulk fuel tank farms are currently operated by Delta Western on Rocky Point (working tank farm on the top of the hill and the Rocky Point tank farm at the base of the bluff by APL's yard). The concrete tanks were installed and operated on Rocky Point and Strawberry Hill during WWII. Standard Oil, Chevron and Delta Western have leased and operated the tanks and land from the federal government and later from OC since the late 1940s. The annual groundwater monitoring for the RPMA conducted by Delta Western and Chevron is being tracked under this file.

Action Information

Action Date	Action	Description	DEC Staff
1/1/1992	Site Added to Database	Pesticides, diesel fuel, jet fuel and bunker "C" oil contamination.	Former Staff
9/30/1992	Site Number Identifier Changed	Region portion of Reckey number changed to consolidate district 26 into 25.	Former Staff
3/4/1994	Update or Other Action	ADEC received a report from APL documenting installation of a sheet pile bulkhead as part of its dock expansion. Based on coordination with DEC, they installed an oil/water separator inland from the bulkhead to collect free phase petroleum hydrocarbons from the groundwater surface. The bulkhead was expected to serve as a cut-off wall which would stop the petroleum sheens into the bay.	John Halverson
6/15/1995	Site Ranked Using the AHRM	Initial ranking. Action code added because it wasn't when the site was originally ranked.	John Halverson
10/31/1997	Site Characterization Workplan Approved	ADEC approved a site investigation workplan for the Rocky Point tank farm. The investigation was being done under a cost sharing agreement between Chevron, Delta Western and the Corps of Engineers. Several years of negotiation and debate preceded the interim agreement. Plan called for test pits around and downgradient from the tanks near APL. Negotiations continuing on the larger Rocky Point area that needs investigation and cleanup.	John Halverson
5/26/1998	Update or Other Action	ADEC received the Subsurface Investigation Report Delta Western/Former Chevron Bulk Plant E100-1428 at Rocky Point Amaknak Island, Dutch Harbor, dated May 1, 1998. It summarized soil and groundwater contamination (elevated DRO and RRO, some free product below the water table) around the Rocky Point tank farm.	John Halverson
8/5/1998	Update or Other Action	ADEC sent a letter to Chevron and Delta Western requesting they install an oil/water separator in the road ditch below the Rocky Point tank farm hill near the Delta Western fuel dock. The USCG reported surface water sheens in Dutch Harbor from the storm water runoff.	John Halverson
8/6/1998	Update or Other Action	ADEC sent a letter to the Corps, Chevron and Delta Western documenting that several years of debate and negotiation have gone on, but no site work has started. Based on a May 28, 1998 meeting ADEC understood that the three parties were to conduct a site characterization for the entire Rocky Point area. Requested a meeting to firm up plans for the investigation.	John Halverson
9/8/1998	Update or Other Action	ADEC sent another letter to Chevron and Delta Western requesting that an oil water separator be installed to treat storm water. Chevron had responded to the previous letter with a request to postpone any work on the site until the City completed its road improvement plans.	John Halverson
9/30/1998	Update or Other Action	Notice of intent to recover costs for ADEC oversight were issued to Chevron and Delta Western.	John Halverson
12/4/1998	Update or Other Action	ADEC sent a letter to the Corps, Chevron and Delta Western summarizing a project planning meeting held to scope out the site characterization plan. It also documented that petroleum contaminated water was evident in runoff from the Anderson, Alaska thermal treatment plant operating under contract to the Corps of Engineers. The letter requested that the Corps participate in implementing measures to prevent contaminated storm water from impacting Dutch Harbor. The letter put the parties on notice that future sheens in the harbor would be violations of the Alaska Water Quality Standards and the Clean Water Act.	John Halverson
3/12/1999	Update or Other Action	ADEC sent Chevron, Delta Western and the Corps of Engineers a letter requesting they identify the location of all abandoned fuel lines associated with the Rocky Point tank farms, conduct site characterization work along the lines, inspect the lines to determine whether they still contain fuel, and if so, remove the fuel.	John Halverson
6/4/1999	Site Characterization Workplan Approved	ADEC conditionally approved the Site Characterization Workplan - Rocky Point Management Area #1, dated May 1999 (Foster Wheeler). Several ADEC comments on the draft workplan were not addressed adequately and responsible parties were informed they may need to undertake additional investigation later.	John Halverson
9/17/1999	Update or Other Action	ADEC received a Site Characterization Data Transmittal - Rocky Point Management Area #1, Amaknak Island, dated September 15, 1999 (RRM). It provides data from the site characterization, but no narrative or evaluation of the data.	John Halverson
9/23/1999	Update or Other Action	ADEC received and approved a groundwater monitoring workplan (letter) from Foster Wheeler Environmental Corp., for sampling in September 1999. Results to be provided in a letter report.	John Halverson
12/27/1999	Update or Other Action	ADEC sent a letter to Chevron and Delta Western requesting they conduct further site characterization work at aqua fuel system #1 and along East Point Road where a release from a three inch diameter pipeline has occurred. Requested a written response by January 30, 2000 committing to do the work and outlining a schedule.	John Halverson
6/9/2000	Update or Other Action	ADEC reviewed a draft "Rocky Point Management Area #1 Pipeline Investigation Report" dated April 28, 2000, prepared by RRM consultants. The report identifies active and abandoned fuel lines, documents seven abandoned lines as still containing fuel, documents fuel and fuel/water mixtures in some pumphouses, concrete tunnels and heater pits and in valve houses. Clarification was requested on several issues in the draft report.	John Halverson
6/9/2000	Update or Other Action	ADEC reviewed draft workplans for site characterization at aqua fuel system #1 and along East Point Road. Workplan received May 16th, 2000. The plan is a conceptual plan and lacks detail on the necessary characterization. ADEC requested further details and a schedule for implementation and reporting.	John Halverson
6/16/2000	Update or Other Action	ADEC sent a letter to the Corps of Engineers requesting it remove bunker C from the abandoned fuel lines at Rocky Point. Requested a written response by July 14 and removal of the product this summer.	John Halverson
6/16/2000	Update or Other Action	ADEC sent a letter to Chevron and Delta Western requesting they empty and clean the abandoned fuel lines still containing product, clean out the concrete tunnels, heater pits, valve houses and pumphouses that contain fuel and fuel/water mixtures and that they inspect the facilities quarterly for accumulation of additional product or contaminated water. Requested a written response by July 14, 2000 committing to do the removals by August 16th or ADEC will pursue enforcement actions which may include conducting the cleanup with State contractors and pursuing cost recovery.	John Halverson
8/30/2000	Long Term Monitoring Established	Chevron agreed to take the lead and work with Delta Western and the Corps to implement quarterly groundwater monitoring.	John Halverson
9/15/2000	Update or Other Action	ADEC sent a letter to Chevron, Delta Western and the Corps commenting on the draft Phase I Site Characterization Report, prepared by Foster Wheeler, August 11, 2000. The draft report documents high levels of petroleum contamination in the thermal treatment area, in the APL yard where a 3" diameter fuel line was found to be leaking in ~1993, in a ravine on top of tank hill between UST 14 and 15, and in various locations along the fuel lines. Comments on the draft report need to be addressed, the report finalized and a Phase II site characterization effort is being planned.	John Halverson
10/10/2000	Update or Other Action	Staff reviewed and commented on a draft Phase II Site Characterization Workplan. Several comments were provided that needed to be addressed before receiving ADEC approval. In general, the plan called for installing several more monitoring wells and drilling and sampling several soil borings to better delineate the extent of contamination. The Phase I report was not finalized, but agreement was reached that the results from Phase I and II would be combined into one report.	John Halverson
2/12/2001	Update or Other Action	ADEC received the Rocky Point Monitoring Program 3rd Quarter Data Report, February 2001, by Jacobs Engineering. It documents groundwater monitoring done in August 2000 and surface water seep sampling done in October 2000.	John Halverson
4/11/2001	Update or Other Action	Staff reviewed and commented on the draft Phase I/II Site Characterization Report dated 2/28/01. Many issues were identified that need to be clarified and resolved in the report before it can be approved as meeting the site characterization requirements.	John Halverson
5/16/2001	Update or Other Action	ADEC received the Fourth Quarter 2000 and First Quarter 2001 Groundwater and Surface Water Monitoring Results Rocky Point Management Area 1 report, prepared by Delta Environmental Consultants. It documents groundwater monitoring done in January and April 2001. Petroleum contaminated groundwater documented at concentrations ranging up to 1,200 mg/l DRO and 27.4 mg/l GRO.	John Halverson
8/6/2001	Update or Other Action	ADEC received the Rocky Point Groundwater Monitoring Data Report (June 2001 Sampling Event), dated August 2001. The report documents water level measurements and analytical results from sampling at 17 monitoring wells throughout the site. Varying levels of petroleum contamination are documented in groundwater ranging up to 3.6 mg/l DRO and 2.2 mg/l GRO (significantly lower than the January and April sampling, however, these latest samples were collected using a peristaltic pump rather than a bailer).	John Halverson
12/7/2001	Update or Other Action	Staff reviewed and commented on the revised draft Phase I/II Site Characterization Report dated July 27, 2001. Numerous issues still need to be resolved in the report.	John Halverson
3/26/2002	Update or Other Action	DEC received the Quarterly Groundwater Monitoring Program - February 2002 Sampling Event - report on the Pre WWII Tank Farm and Rocky Point, dated March 2002, by Jacobs Eng.	John Halverson
4/22/2002	Update or Other Action	DEC received a draft data report - Rocky Point Groundwater Monitoring Program, September 2001 Sampling Event, dated December 2001, by Jacobs Engineering.	John Halverson
5/16/2002	Site Characterization Report Approved	DEC received the Final Phase I/II Site Characterization Report for Rocky Point Management Area #1, dated May 15, 2002, by Foster Wheeler. The report documents the site history and prior site characterization work. The report recommends interim removal actions at the lower APL area and between the thermal treatment area and East Point Road. It recommends a focused feasibility study on the Pete's Creek area, thermal treatment area, and around Building 575. Further characterization was recommended for Pete's Creek, Strawberry Hill (Tank 17-18 Area, Building 627 and Tar Pond A). It recommends preparing a closure report for the Upper Tank Farm Area.	John Halverson
6/21/2002	Long Term Monitoring Established	DEC received the Groundwater Monitoring Program 2001 Annual Report for the Pre-WWII Tank Farm and Rocky Point, dated June 2002, by Jacobs Engineering.	John Halverson
7/3/2002	Update or Other Action	Staff reviewed and commented on a draft Phase III Site Characterization Workplan. Several clarifications were requested.	John Halverson
7/9/2002	Update or Other Action	DEC received the Pre-WWII Tank Farm / Rocky Point Quarterly Groundwater Monitoring Report, May 2002 Sampling Event, by Jacobs Engineering.	John Halverson
7/17/2002	Update or Other Action	Staff reviewed and commented on a revised draft Interim Removal work plan for the area between the thermal treatment yard and East Point Road and for the APL South Area.	John Halverson
8/21/2002	Update or Other Action	Staff approved a workplan for an interim removal action to excavate and stockpile petroleum contaminated soil between the Thermal Treatment area and East Point Road and to use ORC to enhance bioremediation of petroleum contaminated groundwater near APL South.	John Halverson
5/15/2003	Update or Other Action	DEC received the draft Phase III Site Characterization Report for Rocky Point Management Area #1, dated May 5, 2003, by Tetra Tech FW. The report indicates discharges from underground tanks 13, 14, and 15 and associated fuel lines caused petroleum contaminated soil and sediment/surface water in a drainage, referred to as "Petes Creek" to the west of the tanks.	John Halverson
12/31/2003	Update or Other Action	DEC received the Groundwater Monitoring Program 2002 Annual Report for the Pre-WWII Tank Farm and Rocky Point, dated December 2003, by Jacobs Engineering.	Meghan Dooley
9/23/2004	Update or Other Action	DEC received the Groundwater Monitoring Program 2003 Annual Report for the Pre-WWII Tank Farm and Rocky Point, dated September 2004, by Jacobs Engineering.	Meghan Dooley
6/10/2005	Update or Other Action	File number issued 2542.38.018.	Aggie Blandford
9/6/2005	Update or Other Action	Deltan Western notified DEC that an abandoned fuel line at the tunnel enterance to Tank 12 has been leaking diesel fuel. The abandoned line (#142) was thought to be isolated but was cross connected with an active line (108) and has been charged. There is a small hole in the end-plate and the line has been pressurized and leaking.	John Halverson
9/26/2005	Update or Other Action	Delta Western forwarded the following: As requested, a product thickness measurement was collected from MWRP-28 this weekend. A summary of the measurements for last month and this month follows: August 12, 2005 Measured at 1410 Product Thickness – 3.67 feet September 25, 2005 Measured at ~2015 Product Thickness – 0.71 feet	John Halverson
9/30/2005	Update or Other Action	DEC sent a letter to Delta Western outlining the history of DEC efforts to ensure fuel pipelines abandoned in place at their Dutch Harbor facility have been properly emptied and closed. Recent releases from abandoned lines demonstrate improper closure. DEC requested a plan for proper closure of all abandoned pipelines at the facility; response requested by Oct. 30. A separate letter was sent to Delta Western requesting characterization and cleanup of the releas from the fuel line near Tank 12.	John Halverson
10/6/2005	Update or Other Action	DEC reviewed and commented on a draft site characterization plan prepared by SECOR to determine the extent of contamination from the line leak at the enterance to the Tank 12 tunnel.	John Halverson
10/7/2005	Cleanup Plan Approved	DEC approved the workplan, prepared by SECOR, for investigation of the Tank 12 pipeline release.	John Halverson
10/21/2005	Cleanup Plan Approved	DEC approved a workplan, prepared by SECOR, to excavated and stockpile petroleum contaminated soil from the Tank 12 pipeline leak.	John Halverson
10/25/2005	Update or Other Action	Delta Western sent a letter to DEC stating it hired a contractor to install new fuel lines at the Dutch Harbor facility, plans to install the lines in 2006 and then properly close specified lines and intends to coordinate with Chevron and the Corps of Engineers to close other lines.	John Halverson
3/3/2006	Update or Other Action	DEC received the "Semi-Annual Area Wide Groundwater Monitoring Report - Second Half 2004" report from SECOR under contract to Chevron. The report documents ~0.3' of LNAPL was measured in MWRP-22. Samples from other MWs did not contain contaminants above the alternative cleanup levels for groundwater (10 times Table C levels).	John Halverson
3/14/2006	Update or Other Action	DEC received the "Documentation Report and Evaluation of Remedial Alternatives for Stockpiled Soil from Tank 12 Excavation Area" report from SECOR under contract to Delta Western. The report documents site characterization and interim cleanup activities associated with a leak from an end cap on a 16" diameter pipeline (line 205), contaminated soil excavation and stockpiling results, and site characterization efforts. Contaminated soil was excavated to fractured bedrock at depths of 6 - 14' below ground surface. Approximately 2,000 cubic yards of diesel contaminated soil were stockpiled on-site. Five of thirteen confirmation samples from the limits of the excavation exceed the DRO cleanup level and one exceeded for RRO. Groundwater impacts are evident downgradient. Monitoring well MWRP-28 contained approximately 1 and 3 feet of LNAPL in March and May respectively. A baildown test was conducted on MWRP-28. Coarse backfill along underground pipeline cooridors was identified as a preferential migration pathway for LNAPL. Treatment/disposal alternatives were evaluated for the stockpiled soil; monitored natural attenuation in the biocell was identified as the preferred alternative. Groundwater and LNAPL monitoring to continue.	John Halverson
5/17/2006	Update or Other Action	DEC conditionally approved an addendum to the 2004 Groundwater Monitoring Workplan for the Rocky Point Management Area. DEC requested samples of NAPL be collected from any MWs that contain NAPL which has not been previously sampled and analyzed to determine the type and extent of weathering of the product.	John Halverson
5/17/2006	Cleanup Level(s) Approved	DEC approved alternative cleanup levels for the Rocky Point Management Area #1. A prior determination was made that groundwater beneath the site is not a current or potential future drinkingwater source (18 AAC 75.350) and approved use of ten times the groundwater cleanup levels as long as groundwater discharging into nearby surface waters does not cause a violation of Alaska water quality standards. Alternative soil cleanup levels were calcutated using method 3 in 18 AAC 75.340. The resulting migration to groundwater values for DRO and RRO exceeded the method two ingestion cleanup levels and the GRO value exceeded the maximum allowable concentration (1400 mg/kg) in Table B-2. Therefore, the following alternative soil cleanup levels were approved: 8,250 mg/kg DRO, 8,300 mg/kg RRO, and 1,400 mg/kg GRO. The approval letter noted the requirement for DEC approval prior to moving any contaminated soil (exceeding method 2 migration to groundwater levels) off-site.	John Halverson
5/23/2006	Update or Other Action	DEC conducted a site inspection of the Rocky Point Management Area with ChevronTexaco, Delta Western, Army Corps of Engineers, SECOR, and Ounalshka Corp. Delta Western's new pipelines design work is done, supports are being surveyed in this week, plan to have a crew installing/welding pipe in ~2 weeks. Inspected pipeline route and surrounding area. Contaminated soil stockpile from the Tank 12 line leak is adjacent to road on the hillside - needs additional netting to secure the cover. Inspected valve houses - the two closest to the fuel dock have a strong fuel odor and sheen/product on water in them. Discussed plan to isolate, clean and conduct maintenance on the valves in each followed by weekly inspections. Inspected the interception trench for product recovery along East Pt. Road; water level flucuating to extent booms don't stay in contact with the watertable - needs resolution. Sump for biocell #2 needs to be drained - biocell may not be draining properly because sump is full of water.	John Halverson
11/6/2006	Update or Other Action	DEC received the "Semi-Annual Area Wide Groundwater Monitoring and Operations and Maintenance Report, First Half 2005" from SECOR under contract to Chevron. The report documents LNAPL measured monitoring wells MWRP-22, MWRP-24, and MWRP-28. MWRP-13 and MWRP-28 were damaged and thus not sampled. Respiration testing at the in-situ bioventing system indicated some preferential subsurface air flow; technical problems prevented completion of the testing. Soil in Biocells #1 and 2 was sampled and demonstrated to meet the cleanup levels; covers will be maintained until the soil is beneficially reused on-site. Limited information on monitoring around the interception trench indicates in general LNAPL thickness is higher on the upgradient side of the trench than the downgradient site; more data is needed to determine the effetiveness of the trench.	John Halverson
11/17/2006	Update or Other Action	SECOR developed a "Focused Feasiblity Study for Pipeline Closure Project, Rocky Point Management Area" on behalf of Chevron. The study recommends uncovering, cleaning and purging all inactive pipelines; removing inactive lines where feasible; cleaning and removing appurtenent facilities (valve houses, pumphouses, ect.); removing a limited amount of soil (up to 3' from the lines) to allow project completion without having to chase contaminated soil - will come back to fully characterize and cleanup as needed; clean and abandone in place lines where removal is unsafe or not practicable; and collect soil samples at 50' intervals along pipelines.	John Halverson
2/13/2007	Update or Other Action	DEC received the "Semi-Annual Areawide Groundwater Monitoring and Operations and Maintenance Report - First Half 2006" from SECOR under contract to Chevron. The LNAPL continues to be measured in monitoring wells MWRP-22, MWRP-24 and MWRP-28. Disolved phase petroleum meets the alternative groundwater cleanup levels. A few MWs contain TAH/TAqH above the water quality standards. Tank tunnels and valve houses were inspected and sampled if no NAPL was observed; NAPL was present in Tank Tunnel #18, valve houses B and G, and Brick House B. Samples were not collected from valve houses C, D, E, F and H or Tank Tunnel 16 due to limited water present. The in-situ bioventing system had been shut off over the winter; to be restarted in May. Contaminated soil stockpiles from Tanks 2 and 12 were inspected/maintained and will be sampled during summer 2006.	John Halverson
4/17/2007	Update or Other Action	DEC received the "Semi-Annual Area Wide Groundwater Monitoring and Operations and Maintenance Report - Second Half 2006" from SECOR under contract to Chevron. LNAPL continues to be measured in monitoring wells MWRP-22, MWRP-24 (increased from 0.15' in September to 2.12' in November), MWRP-25 and MWRP-28; additionally LNAPL was indicated by the interface probe in MWRP-5, however, no sheen was observed in the purge water. RPWM-5 exceeded the TAH and TAqH criteria and PC-2 exceeded the TAH criteria. All other groundwater samples met the cleanup levels. Tank Tunnel 18 and Valve Houses C, B, F, and G were not sampled due to the presence of NAPL. The in-situ bioventing system was re-started in May and operated until December. The covers on biocells 1 and 2 were inspected/maintained. Data loggers were installed and operated in monitoring points around the interception trench to determine water level fluctuations; the water level dropped below the bottom of the system, vault 2 was found to be dry. Sorbent material in the vaults was inspected and replaced as needed. Soil from the Tank 12 stockpile was sampled and the upper portion was determined to meet cleanup levels; the lower portion still needs to be adequately characterized. In Jan. 2006, while installing an electrical line, Delta Western encountered petroleum contaminated soil near Tank 2 in the lower tank farm. Approximately 150 cy of contaminated soil were placed in a new stockpile at Rocky Point. The stockpile was sampled in Sept. and found to meet the site specific cleanup alternative cleanup levels. Oil water separators were inspected and maintained.	John Halverson
7/17/2007	Cleanup Plan Approved	DEC approved a Pipeline Closure Workplan for Rocky Point Management Area. The plan calls for draining, cleaning and removing (unless safety concerns warrant in place closure of sections) all inactive fuel pipelines at Rocky Point, characterizing soil along the pipeline coordidors, removing contaminated soil located within 3' of the lines and stockpiling it for treatment next year. Cleanup of contaminated soil extending beyond 3' from the pipelines will be incorporated into the overall site cleanup plan scheduled for 2008.	John Halverson
2/4/2008	Update or Other Action	DEC received the 2005 Field Activities Report from SECOR under contract to Chevron. Operation of the in-situ bioventing system installed between Tanks 14 - 15 began; a radius of influence test and respiration test were conducted in May. Air injection was initiated at Bio-cell #2 in May; in November SECOR requested and received approval to shut off the bio-cells contingent upon the cells being maintained and additional confirmation sampling prior to removing soil for reuse on-site. The old oil/water separator along East Point Road was removed and a new one installed between the former Thermal Treatment Area and Delta Western's Truck Loading Rack. LNAPL from MWRP-28 was sampled and analyzed by CETC and determined to be moderately weathered diesel fuel. The report sumarizes investigation of the Tank 12 pipeline release. SECOR began a treatability study through their Ohio lab on site soils; results to be used to propose a final remediation alternative for Rocky Point.	John Halverson
3/5/2008	Update or Other Action	DEC received the "Semi-Annual Groundwater Monitoring and Operations and Maintenance Report - First Half 2007" from SECOR on behalf of Chevron. LNAPL continues to be observed in MWRP-22, MWRP-24, MWRP-28, MW-2 and MW-13; samples were not collected from these wells for laboratory analysis. Water samples from MWRP-33 and PC-2 continue to exceed the cleanup levels. Water samples were collected from the tunnels into tanks 12, 13, 17 and 18, valve house A, and two brick structures thought to be heater pits; water from these structures contains elevated concentrations of DRO, RRO, PAHs, and/or BTEX. The bioventing system on tank hill was not operating - it had been shut off for the winter and the power line was cut by a plow; based on a review of past performance data SECOR recommended discontinuing operation of the system and development of an alternative cleanup option. Soil in biocells 1 and 2 and the stockpile from Tank 2 was characterized, met cleanup levels, and the cells were decommissioned; the treated soil was stockpiled for use as on-site backfill during the pipeline closure project. The top 4 feet of soil in the Tank 12 Stockpile was sampled and met the site cleanup levels; the top 4 feet can be removed and used as on-site backfill and then the remainder of the stockpile needs to be characterized. Sorbent booms in the interception trench were changed out during the first quarter and were still in good condition during the second quarter.	John Halverson
5/30/2008	Exposure Tracking Model Ranking	Initial ranking with ETM completed.	Evonne Reese
6/11/2008	Update or Other Action	DEC received the Semi-Annual Areawide Groundwater Monitoring and Operations and Maintenance Report - Second Half 2007" prepared by SECOR for Chevron. Monitoring wells MWRP-11, MWRP-28 and PC-02 contained TAH and/or TAqH above the water quality standards. SECOR recommended additional excavation around MWRP-11 do remove residual contamination from the July 14, 2007 release. The in-situ bioventing system was not operated - SECOR evaluated the system and recommened (in the First Half 2007 Semi-Annual report) that it no longer be operated. Product removal using PetroTraps or a bailer included removing some sheen to ~1 liter of product from various MWs and piezometers; MWRP-24 had ~7.4 liters of product removed in the 4th quarter. The o/w separators were maintained.	John Halverson
6/30/2008	Update or Other Action	DEC received the "2007 Pipeline Closure Documentation Report..." prepared by Stantec on behalf of Chevron. The report documents work done to properly close abandoned fuel pipelines at the Rocky Point Tank Farm area. Approximately 18,200 lineal feet of pipeline was identified for closure in the workplan; an additional 10,021 feet of pipeline was identified during the fieldwork. A total of 18,021 feet of pipeline was removed. Site characterization and limited soil removal were conducted. Some of the valve houses were also cleaned and demolished. Two underground brick structures thought to be part of heater-pits were found to be transformer vaults; the transfomers were removed, sampled, determined to be non-PCB transformers and disposed of off-site; trace levels of PCB were found in water from one vault. Due to the increase in the amount of piping determined to be present, additional closure will be conducted in 2008.	John Halverson
3/30/2009	Update or Other Action	DEC received a copy of the "Semi-Annual Area Wide Groundwater Monitoring Report and O&M Report - First Half 2008" from Stantec, on behalf of Chevron. The report documents groundwater level and flow directions, generally stable or decreasing petroleum concentrations in groundwater, the presence of measurable LNAPL in 9 out of 61 monitoring wells that were gauged, residual petroleum contaminated water access tunnels to abandoned underground storage tanks 16, 17 and 18, and work done to maintain and evaluate the interception trench/product recovery system and the oil water separator system.	John Halverson
6/4/2009	Interim Removal Action Approved	DEC received the 2008 Pipeline Closure Report for the Rocky Point Management Area, prepared by Stantec for Chevron. The report documents removal or in-place closure of 23 pipelines (332 linear feet (LF) of above ground lines and 9,098 LF of below ground lines). Approximately 7,000 LF of pipe was removed from the ground and 2,400 LF closed in place. Approximately, 16,185 gallons of residual fuel were removed from the piping. Over 101,000 gallons of contaminated water from decontamination and dewatering activities were treated on-site and discharged. Over 400 soil samples were collected and analyzed. Eight appertenant structures (valve houses, pump houses, etc.) were cleaned and removed. Approximately 6,000 LF of inactive pipeline have been identified for future closure.	John Halverson
7/31/2009	Update or Other Action	DEC received the "Semi-Annual Area-Wide Groundwater Monitoring and Operations and Maintenance Report - Second Half 2008", from Stantec on behalf of Chevron. 59 monitoring wells were gauged for water level data and 33 MWs were sampled. Samples from three MWs exceeded the cleanup levels for groundwater discharging into surface water; the 30 other MWs did not exceed cleanup levels of 10 times the Table C levels (samples from 5 MWs exceeded the Table C levels). Eight MWs (four of which are in the Pre WWII Tank Farm Area {MW-2, MW-11, MW-13 and MW-16} and four within the Thermal Treatment Area {MWRP-22, MWRP-24, MWRP-28 and IWPZ-07}) contained measurable LNAPL and were not sampled. LNAPL thickness ranged from 0.04' to 2.78'. 5.85 liters of product were removed from the MWs in the Thermal Treatment area. Product mobility and recoverability are being evaluated. Five tank tunnels and ten valve houses have been inspected and water samples collected from them over time. Nine of the valve houses were removed during 2007-08; valve house H remains - no water was present in valve house H during the quarterly inspections. The tank tunnels were not sampled during the 2nd half of 2008. The bioventing system on Tank Hill remained off pending development of an alternative cleanup plan. Sorbent booms in the interception trench and on-site oil water seperator were inspected and replaced as necessary.	John Halverson
8/27/2009	Update or Other Action	Note to file 8-27-09. As per John Halverson I am cross-referencing five documents: 1. Phase 2 Characterization Workplan for East Point/Ballyhoo Road Rehabilitation Unalaska March 2000, Golder Associates; 2. Draft Phase 2 Site Characterization Unalaska: East Point/Ballyhoo Rd. Rehabilitation April 2001, Golder Associates; 3. Preliminary Engineering Study for the Relocation of Pipelines at The Dutch Harbor Facility, Unalaska; November 2001, Hattenburg & Dilley Engineering Consultants; 4. Phase 2 Site Characterization Unalaska: East Point/Ballyhoo Rd. Rehabilitation June 2003, Golder Associates; and 5. Corrective Action Plan for Unalaska: East Point/Ballyhoo Rd. Rehabilitation Unalaska December 2003, Golder Associates. These five documents are associated with the file number 2542.38.030 which is listed in the FileRoom database but not listed in the CS database. These five documents are filed in the CS files, in Anchorage, under file number 2542.38.030. This note will be placed in the three Hazard ID #’s: 509, 510, and 512 under CS file number 2542.38.018.	Pam Clemens
6/23/2010	Update or Other Action	The Annual Area-Wide Groundwater Monitoring and Operations and Maintenance Report - 2009 was recieved to ADEC. The report addressed groundwater contamination in the Rocky Point Management Area as well as maintenance of structures associated with the remedy. During the first half of 2009, 62 wells were gauged for LNAPL thickness and groundwater depth. Samples were collected from 32 wells and 5 wells exceeded cleanup levels for surface water. Eight wells had residual or measurable thickness of LNAPL, however some of these contained Bunker-C like material and were not removed. In second half 2009, 4 wells were installed during the Site Assessment and incorporated into the groundwater monitoring program. Monitoring was discontinued at Well PC-01 as a new well was installed in the area. Seven wells that were gauged had residual or measurable free product, one of these containing Bunker-C. The installation of MWRP-37 in the APL operations area called for recovery of 83.28 L of product. 57 wells were gauged and 32 were sampled in the second half of 2009. Five wells exceeded surface water cleanup levels in tank Hill area, Petes Creek, APL operations, and Thermal Treatment Area. O&M activities were performed on the OWS, the interceptor trench, tank tunnels, and the sedimentation basin. Boom was replaced as needed.	Meghan Dooley
8/20/2010	Update or Other Action	ADEC received the 2009 Site Assessment Documentation Report. A total of 106 locations were sampled with UVOST/LIF in the Rocky Point Managment Area to characterize extent of soil contamination. Four monitoring wells were installed and incorporated into the groundwater monitoring program. High DRO concentrations were found in the surface and subsurface and have the potential to be causing elevated levels downgradient. Tanks 13, 14, and 16 may be contributing to contamination near and downgradient of those areas.	Meghan Dooley
4/16/2012	Meeting or Teleconference Held	ADEC and ADOL staff met with Chevron and Delta Western to discuss the path forward for cleanup at Tank Hill, the Thermal Treatment Area, and MWRP-37. Chevron and Delta Western will submit a Focused Feasibility Study in August to address concerns at the sites.	Meghan Dooley
10/30/2012	Meeting or Teleconference Held	ADEC and ADOL met with Chevron and Delta Western to discuss the Focused Alternative Analysis for Tank Hill and the Thermal Treatment Area.	Meghan Dooley
11/27/2012	Document, Report, or Work plan Review - other	ADEC received the Focused Alternative Analysis on September 28. Following a meeting discussing the document, ADEC sent specific comments on November 27. The preferred alternative is long term monitoring and institutional controls. Major comments included what institutional controls will be proposed, and how they will be maintained and protective.	Meghan Dooley
1/22/2013	Document, Report, or Work plan Review - other	ADEC sent comments and a request for further action to Delta Western to clean and close tanks 12-18 and the associated tunnels and pipelines. The report detailed work completed to date in treating liquid drained from tanks 12-18 during the 2011 field season.	Meghan Dooley
12/20/2013	Update or Other Action	ADEC recieves response to comments regarding the Focused Alternatives Analysis for Tank Hill and for the Thermal Treatment Area (two seperate reports).	Meredith Savage
12/20/2013	Update or Other Action	ADEC recieves the document titled: "Closure Responsibility for Cut and Covered Tanks Utility Piping and Equipment, Rocky Point Management Area, Dutch Harbor, Unalaska, Alaska." Farallon Consulting submitted the document on behalf of Chevron Environmental Management Company and Delta Western. The document presents the argument that the US Army Corps is responsible for a large portion of the underground piping and heating facilities for the Cut and Covered Tanks 12-18 because neither Standard Oil (later Chevron)nor Delta Western used those facilities and that the heating and piping facilities were largely disfunctional by the time Standard Oil leased the site.	Meredith Savage
1/27/2014	Update or Other Action	ADEC provides a reply (and comments) to the RP's response to ADEC's original comments. ADEC states that while it accepts most of the RP responses to ADEC's original comments, there are several with which ADEC disagrees. The primary concerns are with the RP's scores for the Comparative Analysis of Alternatives and the resultant selection of preferrred remediation alternative (both sites), conclusions drawn from the linear regression analysis regarding plume behavior (Tank Hill site), extent of AOC 1 and 2 smear zones (TTA), RP's determination of water quality and quantity below the Rocky Point Management Area, and conclusions made based on comparisons of soils samples taken in different years from different soil depths. ADEC notifies RP of their intent to schedule a project planning meeting.	Meredith Savage
2/4/2014	Update or Other Action	ADEC sends out a meeting request to Chevron, Delta Western, Ounalashka Corporation, and the USACE, regarding closure responsibility for the Cut and Covered Tanks; the meeting is scheduled for the morning of March 18, 2014. A second meeting with between Delta Western, Chevron, and OC will be held in the afternoon to discuss the Focused Alternatives Analysis for Tank Hill and the TTA.	Meredith Savage
3/24/2014	Document, Report, or Work plan Review - other	Received draft Rocky Point Pipeline and Transformer CON/HTRW Removal Action Work Plan, Amaknak Island, Unalaska, Alaska. The work plan details all tasks associated with 1) removal of 2,375 to 3,875 feet of buried pipeline, 2) removal and disposal or recycling of 7,000 to 13,000 gallons of petroleum, oil, and lubricants (POL) product from pipelines, 3) removal, transport, and disposal of up to 15 tons of POL soil 4) removal and disposal of Valve House H, 5) removal of five to seven vaults and their contents and removal and disposal of 10 to 20 transformers.	Meredith Savage
6/11/2014	Document, Report, or Work plan Review - other	Review and comments sent out for draft Rocky Point Pipeline and Transformer CON/HTRW Removal Action Work Plan, Amaknak Island, Unalaska, Alaska.	Meredith Savage
7/31/2014	Document, Report, or Work plan Review - other	Received Revision 1 of Rocky Point Pipeline and Transformer CON/HTRW Removal Action Work Plan, Amaknak Island, Unalaska, Alaska. Final approval of the work plan sent out on July 31, 2014; approval contingent upon the addition of DRO, RRO, and VOC sample analysis within the transformer vaults.	Meredith Savage
8/26/2014	Document, Report, or Work plan Review - other	Received agreement from RP to conduct additional sampling within the transformer vaults.	Meredith Savage
8/28/2014	Document, Report, or Work plan Review - other	Received following document: RPMA - Notification to Collect Additional Site Characterization Data. Notification of the potential of conducting up to 10 soil borings within the Thermal Treatment Area in support of ongoing remedial efforts at the Rocky Point Management Area (RPMA).	Meredith Savage
11/5/2014	Document, Report, or Work plan Review - other	Received Cut and Covered Tank Tunnel Weir Inspection Summary, Rocky Point Management Area. The inspection report summarizes the weekly inspections of tunnel weirs for tanks 12, 13, 16, 17, and 18, for the time period from February 3 through August 29, 2014. All weirs are located at the entrance to the tank tunnels and all are operating as designed. Water levels within the tunnels was observed up to the tunnel weir one time at Tank 16 and several times at Tanks 13 and 17; On April 15, 2014, water was observed discharging from the tunnel at Tank 13, but no petroleum sheen or LNAPL was evident.	Meredith Savage
4/1/2015	Document, Report, or Work plan Review - other	The Alaska Department of Environmental Conservation (ADEC) received a report titled Rocky Point Pipeline and Transformer CON/HTRW Removal Action on February 12, 2015. The report summarizes the work entailed in the removal of various pipelines and a valve house within the Rocky Point area of Dutch Harbor and provides analytical results from soil and water sampling. Tasks completed in the 2014 field season include: pipelines 190, 208, 214, and 216 were entirely removed; pipelines 192, 209, and 215 were mostly removed; and Valve House H was entirely removed. The remaining sections of pipelines 192, 209, and 215 will be removed during the 2015 field season as will Concrete Vault 3, and contaminated soil from Vault 3 and Vault MH62. Vaults MH62 and MH63 will be closed in place in 2015. Contaminated soil remains at Pipelines 190, 192, and 208. ADEC has reviewed this report and accepts it as final.	Meredith Savage
4/1/2016	Document, Report, or Work plan Review - other	ADEC received the final report titled Removal Action Report for the Rocky Point Pipeline and Transformer CON/HTRW Removal Action on March 23, 2016. The report summarizes the work entailed in the removal of various pipelines and infrastructure within the Rocky Point Management Area of Dutch Harbor and provides analytical results from soil and water sampling. Tasks completed during the 2015 field season include the removal of pipelines 190, 192, 209, 208, 214, 215 and 216, the removal of Valve House H and Concrete Vault 3, and the in place closure of Transformer Vaults MH62 and MH63. This work completed the USACE CON/HTRW Removal Action which began in 2014. ADEC has reviewed this report and accepts it as final.	Holly Weiss-Racine
4/14/2016	Update or Other Action	ADEC sent a letter to Chevron and Delta Western requesting a Work Plan to take remedial action at the RPMA Cut and Cover Tanks (Tanks 12-18). The letter requested the preparation a Work Plan for the closure of the Cut and Cover tanks, associated utility tunnels, piping or equipment no later than May 31, 2016.	Holly Weiss-Racine
5/19/2016	Update or Other Action	ADEC received a letter from Chevron stating that Chevron and Delta Western would jointly prepare a Work Plan to evaluate the safety and technical challenges associated with the tank closure work, but not a work plan for the closure activities. Discussions concerning PRPs remains ongoing. Additionally, Chevron requested a work plan extension with a proposed deadline of August 31, 2016. ADEC approved this request.	Holly Weiss-Racine
6/15/2016	Document, Report, or Work plan Review - other	Approved the “Annual Area-Wide Groundwater Monitoring and Operations and Maintenance Report - 2014” for the RPMA. In 2016, Stantec will attempt to locate and repair damaged monitoring wells within the RPMA monitoring well network. If MWRP-18 is unrepairable, replacement of this monitoring well will be evaluated and results documented in subsequent groundwater monitoring reports.	Holly Weiss-Racine
11/4/2016	Document, Report, or Work plan Review - other	Approved the “Annual Area-Wide Groundwater Monitoring and Operations and Maintenance Report - 2015” for the RPMA. In 2016, Stantec will attempt to locate and repair damaged monitoring wells within the RPMA monitoring well network.	Holly Weiss-Racine
2/24/2017	Update or Other Action	Chevron submitted a "cut and cover tanks" site status update letter to DEC. Stantec personnel were on-site during November - December 2016 collecting 4th quarter groundwater monitoring and inspecting and collected data on the cut and cover tank systems. An assessment memo will be submitted by April 1, 2017 providing a summary the inspections, groundwater and utility tunnel water elevations, water quality data from samples collected within the tunnels, survey data, estimated water volumes in the tunnels, and a structural engineer's recommendations regarding measures to allow inspections/work in the tunnels.	John Halverson
5/31/2017	Update or Other Action	ADEC received the “Annual Area-Wide Groundwater Monitoring and Operations and Maintenance Report - 2016” for the RPMA by Stantec on behalf of Chevron and Delta Western.	Linda (Qi) Liu
9/6/2017	Document, Report, or Work plan Review - other	ADEC received Delta Western/Chevron Cut and Cover Tank Tunnel Weir Inspection Summary, October through December 2016, Rocky Point Management Area dated September 5, 2017. The weirs are operating as designed with underflow baffles to prevent discharge of floating LNAPL or sheen. No water was observed discharging from the utility tunnels for Tanks 12, 13, 16, 17, or 18 during the inspections conducted over the reporting period. Standing water was observed in contact with the weir but not discharging from the tunnel entrance for Tank 13 during the inspections conducted between October 29 and November 19, 2016 and on December 4, 21, and 28, 2016. Standing water was observed in contact with the weir but not discharging from the tunnel entrance for Tank 17 during the inspections conducted over the reporting period. No LNAPL or sheen was observed on the standing water in contact with the weirs, and no LNAPL or sheen was observed in standing water in other tunnels where surface water was visible. Standing water was not observed in contact with the weirs in Tanks 12, 16, or 18 during the inspections conducted over the reporting period.	Darren Mulkey
9/20/2017	Document, Report, or Work plan Review - other	ADEC received a Transformers and Pipeline CON/HTRW Closeout Report on 9/6/17 by email. ADEC approved the report but clarified that even though the pipeline removal project is associated with Haz ID 509, there are remaining contamination in the Tank Hill area. They need to be addressed under the multiple PRP agreement and the Tank Hill site won't be closed at this moment.	Linda (Qi) Liu
11/3/2017	Document, Report, or Work plan Review - other	ADEC received, commented and approved "Sampling and Analysis Plan for Groundwater Monitoring and Operations and Maintenance" for RPMA area. The plan was submitted by Stantec on behalf of Chevron and Delta Western.	Linda (Qi) Liu
7/2/2018	Update or Other Action	ADEC received the “Annual Area-Wide Groundwater Monitoring and Operations and Maintenance Report - 2017” for the RPMA by Stantec on behalf of Chevron and Delta Western.	Rachael Petraeus
10/10/2018	Document, Report, or Work plan Review - other	ADEC received CUT AND COVERED TANK TUNNEL WEIR INSPECTION SUMMARY OCTOBER THROUGH DECEMBER 2017. The weirs are operating as designed with underflow baffles to prevent discharge of floating LNAPL or sheen. No water was observed discharging from the utility tunnels for Tanks 12, 16, 17, or 18 during the inspections conducted over the reporting period. Water was observed discharging from the tunnel for Tank 13 on December 1, 15, 21, and 28, 2017, but no LNAPL or sheen were observed on the discharging water. Standing water was observed in contact with the weir but not discharging from the tunnel entrance for Tank 17 during each of the inspections over the reporting period. Standing water was not observed in contact with the weirs in Tanks 12, 16, or 18 during the inspections conducted over the reporting period.	Rachael Petraeus
2/21/2019	Update or Other Action	ADEC received "Cut and Covered Tank Tunnel Weir Inspection Summary July through September 2018 Rocky Point Management Area Dutch Harbor, Unalaska, Alaska" report dated February 18, 2019. The weirs are operating as designed with underflow baffles to prevent discharge of floating LNAPL or sheen. No water was observed discharging from the utility tunnels for Tanks 12, 13, 16, 17, or 18 during the inspections conducted over the reporting period.	Rachael Petraeus
4/12/2019	Document, Report, or Work plan Review - other	ADEC received "Cut and Covered Tank Tunnel Weir Inspection Summary October through December 2018 Rocky Point Management Area Dutch Harbor, Unalaska, Alaska" report dated April 10, 2019. The weirs are operating as designed with underflow baffles to prevent discharge of floating LNAPL or sheen. No water was observed discharging from the utility tunnels for Tanks 12 or 18 during the inspections conducted over the reporting period. Water was observed discharging from the tunnels for Tanks 13, 16, and 17 during the inspections on December 7 and 14, 2018 but no sheen or LNAPL was observed on the discharging water.	Rachael Petraeus
6/13/2019	Document, Report, or Work plan Review - other	On June 13, 2019, ADEC received "Cut and Covered Tank Tunnel Weir Inspection Summary January Through March 2019 Rocky Point Management Area Dutch Harbor, Unalaska, Alaska". The weirs are operating as designed with underflow baffles to prevent discharge of floating LNAPL or sheen. No water was observed discharging from the utility tunnels for Tanks 12 or 18 during the inspections conducted over the reporting period. Water was observed discharging from one of more of the tunnels for Tanks 13, 16, and 17 in several inspections during the reporting period but no sheen or LNAPL was observed on the discharging water.	Rachael Petraeus
8/19/2019	Document, Report, or Work plan Review - other	On August 19, 2019, ADEC received "Cut and Covered Tank Tunnel Weir Inspection Summary April through June 2019 Rocky Point Management Area Dutch Harbor, Unalaska, Alaska." No water was observed discharging from the utility tunnels for Tanks 12, 16 or 18 during the inspections conducted over the reporting period. Water was observed discharging from one of more of the tunnels for Tanks 13, and 17 in several inspections during the reporting period but no sheen or LNAPL was observed on the discharging water.	Rachael Petraeus
1/28/2020	Update or Other Action	ADEC received the transmittal letter "Rocky Point Management Area Weir Inspection Activities" dated December 20, 2019. The letter documents a request that , effective January 1, 2020, monthly weir inspections be completed for Tanks 12, 13, 16, 17 and 18 the Dutch Harbor Rocky Point Tank Farm rather than weekly weir inspections. ADEC approves the request for a 2 year period, with a requirement to assess water sample results taken during that time to determine if there is data variability in the water samples due to concentration fluctuations or sampling method. ADEC requests to include these water samples results in the annual groundwater monitoring reports. In addition, if new site inspection results indicate an observance of water with sheen being discharged from any of the tank tunnels and/or sample results indicate changes in concentration variability at the groundwater monitoring wells sampled, ADEC will request modifications in sampling frequencies in the future.	Rachael Petraeus
8/11/2021	Document, Report, or Work plan Review - other	Bulk action for all sites within the Rocky Point Management Area Operational Area Boundaries. ADEC received the Annual Area-Wide Groundwater Monitoring and Operation and Maintenance Report – 2020 for the Rocky Point Management Area in Dutch Harbor, Unalaska on May 26, 2021. Activities included inspection and maintenance of the Thermal Treatment Area (TTA) oil-water separator (OWS) and sedimentation basin; the East Point Loop Road (EPLR) OWS and sedimentation basin; and the TTA groundwater interceptor trench, collection vaults, and surface water drainage culverts. Light nonaqueous-phase liquid (LNAPL) recovery O&M activities at monitoring wells MWRP-24 and MWRP-37 are ongoing, and in 2020 were conducted on a monthly basis at monitoring well MWRP-24 and on a weekly basis at monitoring well MWRP-37. The frequency of the groundwater monitoring and O&M activities at the Rocky Point Management Area (RPMA) was reduced from semiannual to annual in 2019. ADEC recommends MWRP-15 is added to the list of wells to be sampled for Diesel Range Organics (DRO), Gasoline Range Organics (GRO), and Polycyclic Aromatic Hydrocarbons (PAHs). Additionally, ADEC requests some recommendations are provided regarding the access to monitoring wells, particularly those with free product historically observed. Several wells were unable to be sampled due to being located under shipping containers. Responses sent on July 16, 2021.	Cascade Galasso-Irish
2/23/2022	Document, Report, or Work plan Review - other	ADEC received the Cut and Covered Tank Tunnel Weir Inspection Summary January 2021 - December 2021 for RPMA, Technical Memorandum, on this date. Tanks 13, 16, and 17 were observed to have water with a sheen and globules of LNAPL. The weirs are operating as designed with underflow baffles to prevent discharge of floating LNAPL or sheen. No water was observed discharging from the utility tunnels for Tanks 12, 13, 16, 17 or 18 during the reporting period.	Cascade Galasso-Irish
7/7/2022	Document, Report, or Work plan Review - other	Bulk action entry for the RPMA - ADEC received the Annual Area-Wide Groundwater Monitoring and Operations and Maintenance Report – 2021 Rocky Point Management Area Dated April 2022. Annual groundwater monitoring is conducted at the Rocky Point Management Area (RPMA), and O&M operations also include the ongoing monthly light non-aqueous phase liquid (LNAPL) recovery at wells MWRP-24 and MWRP-37. Due to project organization changes since the last work plan was approved in 2017, ADEC requests an updated work plan be provided to ADEC for review and approval prior to the 2023 field efforts. In future reporting, ADEC requests the hazardous wastes and contaminated media derived from the RPMA groundwater monitoring are catalogued and a Transport, Treatment and Disposal form is provided to ADEC for review and approval in accordance with 18 AAC 75.325(i) when the wastes are transferred to a final destination. Per comment resolution, ADEC no longer supports discharge of purge water to the ground surface without granular activated carbon (GAC) treatment or being containerized and disposed of off-site. ADEC may approves foregoing soil sampling at this time if groundwater is handled appropriately in subsequent annual sampling. However, prior to site closure, soil sampling will need to occur to verify residual contamination is below current cleanup levels. ADEC concurs with the recommendations for the 2022 season in the cover letter submitted with the 2021 report. ADEC approved the final report on this date.	Cascade Galasso-Irish
11/15/2022	Document, Report, or Work plan Review - other	On November 15, 2019, ADEC received "Cut and Covered Tank Tunnel Surface Water Trend Analysis, Rocky Point Management Area, Dutch Harbor, Alaska." DRO and RRO were both found to have increasing trends in Tank Tunnel 13, and monthly inspections note sheen and LNAPL globules have been present, although not discharging from the tank tunnel at any point during 2021 inspections. The report recommends monthly monitoring of the tank tunnels continue for the next year (2023), and surface water sampling continue to be collected on an annual basis. GRO and BTEX have not been detected above Table C since 2008 and are recommended for removal from the sampling program.	Cascade Galasso-Irish
2/7/2023	Document, Report, or Work plan Review - other	Bulk action on Dutch Hbr - Rocky Point Tank Hill and Rocky Point Tanks 17-18. On this date, ADEC approved the Cut and Cover Tank Tunnel Surface Water Trend Analysis for the RPMA. 2022 results for Tank 17 indicate the highest detection of DRO since 2011, and the highest recorded measurement of RRO. 2022 sampling results show both DRO and RRO are an order of magnitude above the 2021 results. ADEC agreed with the recommendation to sample Wells MWRP-08 and MWRP-09 (groundwater wells nearest Tanks 17 and 18) in 2023 for additional information, and to collect and sample an additional set of surface water samples from Tank Tunnels 17 and 18 during a relatively high-water event to determine if the 2022 results were representative. ADEC also agreed with the continued annual sampling of surface water and with the removal of GRO and BTEX analytes from the surface water sampling.	Cascade Galasso-Irish
4/20/2023	Document, Report, or Work plan Review - other	Bulk action entry for RPMA sites - on this date, DEC received and approved the 2022 Final Annual Area-Wide Groundwater Monitoring and Operation Maintenance Report for the Rocky Point Management Area, Dutch Harbor, Unalaska, Alaska. This document also includes the 2022 Well Status Report (Appendix E), the 2022 Cut and Cover Tank Tunnel Surface Water Trend Analysis (Appendix F), and the 2022 Product Recovery Tech Memo (Appendix G). The document has been filed under the sitewide RPMA file, Rocky Point Tank Hill, Hazard ID 509.	Cascade Galasso-Irish
6/2/2023	Document, Report, or Work plan Review - other	On this date, DEC reviewed and approved the Final Sampling and Analysis Plan, Area-Wide Groundwater Monitoring and Operation and Maintenance Sampling and Analysis Plan, Rocky Point Management Area, Unalaska, Alaska.	Cascade Galasso-Irish
1/30/2024	Document, Report, or Work plan Review - other	Bulk action entry for annual RPMA groundwater monitoring sites - DEC received the Annual Area-Wide Groundwater Monitoring and Operation and Maintenance Report – 2023 for the Rocky Point Management Area in Dutch Harbor, Unalaska. DEC agreed with all recommendations, including another attempt to sample MWRP-08 and -09 to monitor if concentrations in Tank Tunnel 17 are migrating to the bay. DEC had no other comments and requested the final document for review once the product recovery memo and weir inspection reports are completed and appended to the document.	Cascade Galasso-Irish

Action Date

Action

Description

DEC Staff

1/1/1992

Site Added to Database

Pesticides, diesel fuel, jet fuel and bunker "C" oil contamination.

Former Staff

9/30/1992

Site Number Identifier Changed

Region portion of Reckey number changed to consolidate district 26 into 25.

Former Staff

3/4/1994

Update or Other Action

ADEC received a report from APL documenting installation of a sheet pile bulkhead as part of its dock expansion. Based on coordination with DEC, they installed an oil/water separator inland from the bulkhead to collect free phase petroleum hydrocarbons from the groundwater surface. The bulkhead was expected to serve as a cut-off wall which would stop the petroleum sheens into the bay.

John Halverson

6/15/1995

Site Ranked Using the AHRM

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

John Halverson

10/31/1997

Site Characterization Workplan Approved

ADEC approved a site investigation workplan for the Rocky Point tank farm. The investigation was being done under a cost sharing agreement between Chevron, Delta Western and the Corps of Engineers. Several years of negotiation and debate preceded the interim agreement. Plan called for test pits around and downgradient from the tanks near APL. Negotiations continuing on the larger Rocky Point area that needs investigation and cleanup.

John Halverson

5/26/1998

Update or Other Action

ADEC received the Subsurface Investigation Report Delta Western/Former Chevron Bulk Plant E100-1428 at Rocky Point Amaknak Island, Dutch Harbor, dated May 1, 1998. It summarized soil and groundwater contamination (elevated DRO and RRO, some free product below the water table) around the Rocky Point tank farm.

John Halverson

8/5/1998

Update or Other Action

ADEC sent a letter to Chevron and Delta Western requesting they install an oil/water separator in the road ditch below the Rocky Point tank farm hill near the Delta Western fuel dock. The USCG reported surface water sheens in Dutch Harbor from the storm water runoff.

John Halverson

8/6/1998

Update or Other Action

ADEC sent a letter to the Corps, Chevron and Delta Western documenting that several years of debate and negotiation have gone on, but no site work has started. Based on a May 28, 1998 meeting ADEC understood that the three parties were to conduct a site characterization for the entire Rocky Point area. Requested a meeting to firm up plans for the investigation.

John Halverson

9/8/1998

Update or Other Action

ADEC sent another letter to Chevron and Delta Western requesting that an oil water separator be installed to treat storm water. Chevron had responded to the previous letter with a request to postpone any work on the site until the City completed its road improvement plans.

John Halverson

9/30/1998

Update or Other Action

Notice of intent to recover costs for ADEC oversight were issued to Chevron and Delta Western.

John Halverson

12/4/1998

Update or Other Action

ADEC sent a letter to the Corps, Chevron and Delta Western summarizing a project planning meeting held to scope out the site characterization plan. It also documented that petroleum contaminated water was evident in runoff from the Anderson, Alaska thermal treatment plant operating under contract to the Corps of Engineers. The letter requested that the Corps participate in implementing measures to prevent contaminated storm water from impacting Dutch Harbor. The letter put the parties on notice that future sheens in the harbor would be violations of the Alaska Water Quality Standards and the Clean Water Act.

John Halverson

3/12/1999

Update or Other Action

ADEC sent Chevron, Delta Western and the Corps of Engineers a letter requesting they identify the location of all abandoned fuel lines associated with the Rocky Point tank farms, conduct site characterization work along the lines, inspect the lines to determine whether they still contain fuel, and if so, remove the fuel.

John Halverson

6/4/1999

Site Characterization Workplan Approved

ADEC conditionally approved the Site Characterization Workplan - Rocky Point Management Area #1, dated May 1999 (Foster Wheeler). Several ADEC comments on the draft workplan were not addressed adequately and responsible parties were informed they may need to undertake additional investigation later.

John Halverson

9/17/1999

Update or Other Action

ADEC received a Site Characterization Data Transmittal - Rocky Point Management Area #1, Amaknak Island, dated September 15, 1999 (RRM). It provides data from the site characterization, but no narrative or evaluation of the data.

John Halverson

9/23/1999

Update or Other Action

ADEC received and approved a groundwater monitoring workplan (letter) from Foster Wheeler Environmental Corp., for sampling in September 1999. Results to be provided in a letter report.

John Halverson

12/27/1999

Update or Other Action

ADEC sent a letter to Chevron and Delta Western requesting they conduct further site characterization work at aqua fuel system #1 and along East Point Road where a release from a three inch diameter pipeline has occurred. Requested a written response by January 30, 2000 committing to do the work and outlining a schedule.

John Halverson

6/9/2000

Update or Other Action

ADEC reviewed a draft "Rocky Point Management Area #1 Pipeline Investigation Report" dated April 28, 2000, prepared by RRM consultants. The report identifies active and abandoned fuel lines, documents seven abandoned lines as still containing fuel, documents fuel and fuel/water mixtures in some pumphouses, concrete tunnels and heater pits and in valve houses. Clarification was requested on several issues in the draft report.

John Halverson

6/9/2000

Update or Other Action

ADEC reviewed draft workplans for site characterization at aqua fuel system #1 and along East Point Road. Workplan received May 16th, 2000. The plan is a conceptual plan and lacks detail on the necessary characterization. ADEC requested further details and a schedule for implementation and reporting.

John Halverson

6/16/2000

Update or Other Action

ADEC sent a letter to the Corps of Engineers requesting it remove bunker C from the abandoned fuel lines at Rocky Point. Requested a written response by July 14 and removal of the product this summer.

John Halverson

6/16/2000

Update or Other Action

ADEC sent a letter to Chevron and Delta Western requesting they empty and clean the abandoned fuel lines still containing product, clean out the concrete tunnels, heater pits, valve houses and pumphouses that contain fuel and fuel/water mixtures and that they inspect the facilities quarterly for accumulation of additional product or contaminated water. Requested a written response by July 14, 2000 committing to do the removals by August 16th or ADEC will pursue enforcement actions which may include conducting the cleanup with State contractors and pursuing cost recovery.

John Halverson

8/30/2000

Long Term Monitoring Established

Chevron agreed to take the lead and work with Delta Western and the Corps to implement quarterly groundwater monitoring.

John Halverson

9/15/2000

Update or Other Action

ADEC sent a letter to Chevron, Delta Western and the Corps commenting on the draft Phase I Site Characterization Report, prepared by Foster Wheeler, August 11, 2000. The draft report documents high levels of petroleum contamination in the thermal treatment area, in the APL yard where a 3" diameter fuel line was found to be leaking in ~1993, in a ravine on top of tank hill between UST 14 and 15, and in various locations along the fuel lines. Comments on the draft report need to be addressed, the report finalized and a Phase II site characterization effort is being planned.

John Halverson

10/10/2000

Update or Other Action

Staff reviewed and commented on a draft Phase II Site Characterization Workplan. Several comments were provided that needed to be addressed before receiving ADEC approval. In general, the plan called for installing several more monitoring wells and drilling and sampling several soil borings to better delineate the extent of contamination. The Phase I report was not finalized, but agreement was reached that the results from Phase I and II would be combined into one report.

John Halverson

2/12/2001

Update or Other Action

ADEC received the Rocky Point Monitoring Program 3rd Quarter Data Report, February 2001, by Jacobs Engineering. It documents groundwater monitoring done in August 2000 and surface water seep sampling done in October 2000.

John Halverson

4/11/2001

Update or Other Action

Staff reviewed and commented on the draft Phase I/II Site Characterization Report dated 2/28/01. Many issues were identified that need to be clarified and resolved in the report before it can be approved as meeting the site characterization requirements.

John Halverson

5/16/2001

Update or Other Action

ADEC received the Fourth Quarter 2000 and First Quarter 2001 Groundwater and Surface Water Monitoring Results Rocky Point Management Area 1 report, prepared by Delta Environmental Consultants. It documents groundwater monitoring done in January and April 2001. Petroleum contaminated groundwater documented at concentrations ranging up to 1,200 mg/l DRO and 27.4 mg/l GRO.

John Halverson

8/6/2001

Update or Other Action

ADEC received the Rocky Point Groundwater Monitoring Data Report (June 2001 Sampling Event), dated August 2001. The report documents water level measurements and analytical results from sampling at 17 monitoring wells throughout the site. Varying levels of petroleum contamination are documented in groundwater ranging up to 3.6 mg/l DRO and 2.2 mg/l GRO (significantly lower than the January and April sampling, however, these latest samples were collected using a peristaltic pump rather than a bailer).

John Halverson

12/7/2001

Update or Other Action

Staff reviewed and commented on the revised draft Phase I/II Site Characterization Report dated July 27, 2001. Numerous issues still need to be resolved in the report.

John Halverson

3/26/2002

Update or Other Action

DEC received the Quarterly Groundwater Monitoring Program - February 2002 Sampling Event - report on the Pre WWII Tank Farm and Rocky Point, dated March 2002, by Jacobs Eng.

John Halverson

4/22/2002

Update or Other Action

DEC received a draft data report - Rocky Point Groundwater Monitoring Program, September 2001 Sampling Event, dated December 2001, by Jacobs Engineering.

John Halverson

5/16/2002

Site Characterization Report Approved

DEC received the Final Phase I/II Site Characterization Report for Rocky Point Management Area #1, dated May 15, 2002, by Foster Wheeler. The report documents the site history and prior site characterization work. The report recommends interim removal actions at the lower APL area and between the thermal treatment area and East Point Road. It recommends a focused feasibility study on the Pete's Creek area, thermal treatment area, and around Building 575. Further characterization was recommended for Pete's Creek, Strawberry Hill (Tank 17-18 Area, Building 627 and Tar Pond A). It recommends preparing a closure report for the Upper Tank Farm Area.

John Halverson

6/21/2002

Long Term Monitoring Established

DEC received the Groundwater Monitoring Program 2001 Annual Report for the Pre-WWII Tank Farm and Rocky Point, dated June 2002, by Jacobs Engineering.

John Halverson

7/3/2002

Update or Other Action

Staff reviewed and commented on a draft Phase III Site Characterization Workplan. Several clarifications were requested.

John Halverson

7/9/2002

Update or Other Action

DEC received the Pre-WWII Tank Farm / Rocky Point Quarterly Groundwater Monitoring Report, May 2002 Sampling Event, by Jacobs Engineering.

John Halverson

7/17/2002

Update or Other Action

Staff reviewed and commented on a revised draft Interim Removal work plan for the area between the thermal treatment yard and East Point Road and for the APL South Area.

John Halverson

8/21/2002

Update or Other Action

Staff approved a workplan for an interim removal action to excavate and stockpile petroleum contaminated soil between the Thermal Treatment area and East Point Road and to use ORC to enhance bioremediation of petroleum contaminated groundwater near APL South.

John Halverson

5/15/2003

Update or Other Action

DEC received the draft Phase III Site Characterization Report for Rocky Point Management Area #1, dated May 5, 2003, by Tetra Tech FW. The report indicates discharges from underground tanks 13, 14, and 15 and associated fuel lines caused petroleum contaminated soil and sediment/surface water in a drainage, referred to as "Petes Creek" to the west of the tanks.

John Halverson

12/31/2003

Update or Other Action

DEC received the Groundwater Monitoring Program 2002 Annual Report for the Pre-WWII Tank Farm and Rocky Point, dated December 2003, by Jacobs Engineering.

Meghan Dooley

9/23/2004

Update or Other Action

DEC received the Groundwater Monitoring Program 2003 Annual Report for the Pre-WWII Tank Farm and Rocky Point, dated September 2004, by Jacobs Engineering.

Meghan Dooley

6/10/2005

Update or Other Action

File number issued 2542.38.018.

Aggie Blandford

9/6/2005

Update or Other Action

Deltan Western notified DEC that an abandoned fuel line at the tunnel enterance to Tank 12 has been leaking diesel fuel. The abandoned line (#142) was thought to be isolated but was cross connected with an active line (108) and has been charged. There is a small hole in the end-plate and the line has been pressurized and leaking.

John Halverson

9/26/2005

Update or Other Action

Delta Western forwarded the following: As requested, a product thickness measurement was collected from MWRP-28 this weekend. A summary of the measurements for last month and this month follows: August 12, 2005 Measured at 1410 Product Thickness – 3.67 feet September 25, 2005 Measured at ~2015 Product Thickness – 0.71 feet

John Halverson

9/30/2005

Update or Other Action

DEC sent a letter to Delta Western outlining the history of DEC efforts to ensure fuel pipelines abandoned in place at their Dutch Harbor facility have been properly emptied and closed. Recent releases from abandoned lines demonstrate improper closure. DEC requested a plan for proper closure of all abandoned pipelines at the facility; response requested by Oct. 30. A separate letter was sent to Delta Western requesting characterization and cleanup of the releas from the fuel line near Tank 12.

John Halverson

10/6/2005

Update or Other Action

DEC reviewed and commented on a draft site characterization plan prepared by SECOR to determine the extent of contamination from the line leak at the enterance to the Tank 12 tunnel.

John Halverson

10/7/2005

Cleanup Plan Approved

DEC approved the workplan, prepared by SECOR, for investigation of the Tank 12 pipeline release.

John Halverson

10/21/2005

Cleanup Plan Approved

DEC approved a workplan, prepared by SECOR, to excavated and stockpile petroleum contaminated soil from the Tank 12 pipeline leak.

John Halverson

10/25/2005

Update or Other Action

Delta Western sent a letter to DEC stating it hired a contractor to install new fuel lines at the Dutch Harbor facility, plans to install the lines in 2006 and then properly close specified lines and intends to coordinate with Chevron and the Corps of Engineers to close other lines.

John Halverson

3/3/2006

Update or Other Action

DEC received the "Semi-Annual Area Wide Groundwater Monitoring Report - Second Half 2004" report from SECOR under contract to Chevron. The report documents ~0.3' of LNAPL was measured in MWRP-22. Samples from other MWs did not contain contaminants above the alternative cleanup levels for groundwater (10 times Table C levels).

John Halverson

3/14/2006

Update or Other Action

DEC received the "Documentation Report and Evaluation of Remedial Alternatives for Stockpiled Soil from Tank 12 Excavation Area" report from SECOR under contract to Delta Western. The report documents site characterization and interim cleanup activities associated with a leak from an end cap on a 16" diameter pipeline (line 205), contaminated soil excavation and stockpiling results, and site characterization efforts. Contaminated soil was excavated to fractured bedrock at depths of 6 - 14' below ground surface. Approximately 2,000 cubic yards of diesel contaminated soil were stockpiled on-site. Five of thirteen confirmation samples from the limits of the excavation exceed the DRO cleanup level and one exceeded for RRO. Groundwater impacts are evident downgradient. Monitoring well MWRP-28 contained approximately 1 and 3 feet of LNAPL in March and May respectively. A baildown test was conducted on MWRP-28. Coarse backfill along underground pipeline cooridors was identified as a preferential migration pathway for LNAPL. Treatment/disposal alternatives were evaluated for the stockpiled soil; monitored natural attenuation in the biocell was identified as the preferred alternative. Groundwater and LNAPL monitoring to continue.

John Halverson

5/17/2006

Update or Other Action

DEC conditionally approved an addendum to the 2004 Groundwater Monitoring Workplan for the Rocky Point Management Area. DEC requested samples of NAPL be collected from any MWs that contain NAPL which has not been previously sampled and analyzed to determine the type and extent of weathering of the product.

John Halverson

5/17/2006

Cleanup Level(s) Approved

DEC approved alternative cleanup levels for the Rocky Point Management Area #1. A prior determination was made that groundwater beneath the site is not a current or potential future drinkingwater source (18 AAC 75.350) and approved use of ten times the groundwater cleanup levels as long as groundwater discharging into nearby surface waters does not cause a violation of Alaska water quality standards. Alternative soil cleanup levels were calcutated using method 3 in 18 AAC 75.340. The resulting migration to groundwater values for DRO and RRO exceeded the method two ingestion cleanup levels and the GRO value exceeded the maximum allowable concentration (1400 mg/kg) in Table B-2. Therefore, the following alternative soil cleanup levels were approved: 8,250 mg/kg DRO, 8,300 mg/kg RRO, and 1,400 mg/kg GRO. The approval letter noted the requirement for DEC approval prior to moving any contaminated soil (exceeding method 2 migration to groundwater levels) off-site.

John Halverson

5/23/2006

Update or Other Action

DEC conducted a site inspection of the Rocky Point Management Area with ChevronTexaco, Delta Western, Army Corps of Engineers, SECOR, and Ounalshka Corp. Delta Western's new pipelines design work is done, supports are being surveyed in this week, plan to have a crew installing/welding pipe in ~2 weeks. Inspected pipeline route and surrounding area. Contaminated soil stockpile from the Tank 12 line leak is adjacent to road on the hillside - needs additional netting to secure the cover. Inspected valve houses - the two closest to the fuel dock have a strong fuel odor and sheen/product on water in them. Discussed plan to isolate, clean and conduct maintenance on the valves in each followed by weekly inspections. Inspected the interception trench for product recovery along East Pt. Road; water level flucuating to extent booms don't stay in contact with the watertable - needs resolution. Sump for biocell #2 needs to be drained - biocell may not be draining properly because sump is full of water.

John Halverson

11/6/2006

Update or Other Action

DEC received the "Semi-Annual Area Wide Groundwater Monitoring and Operations and Maintenance Report, First Half 2005" from SECOR under contract to Chevron. The report documents LNAPL measured monitoring wells MWRP-22, MWRP-24, and MWRP-28. MWRP-13 and MWRP-28 were damaged and thus not sampled. Respiration testing at the in-situ bioventing system indicated some preferential subsurface air flow; technical problems prevented completion of the testing. Soil in Biocells #1 and 2 was sampled and demonstrated to meet the cleanup levels; covers will be maintained until the soil is beneficially reused on-site. Limited information on monitoring around the interception trench indicates in general LNAPL thickness is higher on the upgradient side of the trench than the downgradient site; more data is needed to determine the effetiveness of the trench.

John Halverson

11/17/2006

Update or Other Action

SECOR developed a "Focused Feasiblity Study for Pipeline Closure Project, Rocky Point Management Area" on behalf of Chevron. The study recommends uncovering, cleaning and purging all inactive pipelines; removing inactive lines where feasible; cleaning and removing appurtenent facilities (valve houses, pumphouses, ect.); removing a limited amount of soil (up to 3' from the lines) to allow project completion without having to chase contaminated soil - will come back to fully characterize and cleanup as needed; clean and abandone in place lines where removal is unsafe or not practicable; and collect soil samples at 50' intervals along pipelines.

John Halverson

2/13/2007

Update or Other Action

DEC received the "Semi-Annual Areawide Groundwater Monitoring and Operations and Maintenance Report - First Half 2006" from SECOR under contract to Chevron. The LNAPL continues to be measured in monitoring wells MWRP-22, MWRP-24 and MWRP-28. Disolved phase petroleum meets the alternative groundwater cleanup levels. A few MWs contain TAH/TAqH above the water quality standards. Tank tunnels and valve houses were inspected and sampled if no NAPL was observed; NAPL was present in Tank Tunnel #18, valve houses B and G, and Brick House B. Samples were not collected from valve houses C, D, E, F and H or Tank Tunnel 16 due to limited water present. The in-situ bioventing system had been shut off over the winter; to be restarted in May. Contaminated soil stockpiles from Tanks 2 and 12 were inspected/maintained and will be sampled during summer 2006.

John Halverson

4/17/2007

Update or Other Action

DEC received the "Semi-Annual Area Wide Groundwater Monitoring and Operations and Maintenance Report - Second Half 2006" from SECOR under contract to Chevron. LNAPL continues to be measured in monitoring wells MWRP-22, MWRP-24 (increased from 0.15' in September to 2.12' in November), MWRP-25 and MWRP-28; additionally LNAPL was indicated by the interface probe in MWRP-5, however, no sheen was observed in the purge water. RPWM-5 exceeded the TAH and TAqH criteria and PC-2 exceeded the TAH criteria. All other groundwater samples met the cleanup levels. Tank Tunnel 18 and Valve Houses C, B, F, and G were not sampled due to the presence of NAPL. The in-situ bioventing system was re-started in May and operated until December. The covers on biocells 1 and 2 were inspected/maintained. Data loggers were installed and operated in monitoring points around the interception trench to determine water level fluctuations; the water level dropped below the bottom of the system, vault 2 was found to be dry. Sorbent material in the vaults was inspected and replaced as needed. Soil from the Tank 12 stockpile was sampled and the upper portion was determined to meet cleanup levels; the lower portion still needs to be adequately characterized. In Jan. 2006, while installing an electrical line, Delta Western encountered petroleum contaminated soil near Tank 2 in the lower tank farm. Approximately 150 cy of contaminated soil were placed in a new stockpile at Rocky Point. The stockpile was sampled in Sept. and found to meet the site specific cleanup alternative cleanup levels. Oil water separators were inspected and maintained.

John Halverson

7/17/2007

Cleanup Plan Approved

DEC approved a Pipeline Closure Workplan for Rocky Point Management Area. The plan calls for draining, cleaning and removing (unless safety concerns warrant in place closure of sections) all inactive fuel pipelines at Rocky Point, characterizing soil along the pipeline coordidors, removing contaminated soil located within 3' of the lines and stockpiling it for treatment next year. Cleanup of contaminated soil extending beyond 3' from the pipelines will be incorporated into the overall site cleanup plan scheduled for 2008.

John Halverson

2/4/2008

Update or Other Action

DEC received the 2005 Field Activities Report from SECOR under contract to Chevron. Operation of the in-situ bioventing system installed between Tanks 14 - 15 began; a radius of influence test and respiration test were conducted in May. Air injection was initiated at Bio-cell #2 in May; in November SECOR requested and received approval to shut off the bio-cells contingent upon the cells being maintained and additional confirmation sampling prior to removing soil for reuse on-site. The old oil/water separator along East Point Road was removed and a new one installed between the former Thermal Treatment Area and Delta Western's Truck Loading Rack. LNAPL from MWRP-28 was sampled and analyzed by CETC and determined to be moderately weathered diesel fuel. The report sumarizes investigation of the Tank 12 pipeline release. SECOR began a treatability study through their Ohio lab on site soils; results to be used to propose a final remediation alternative for Rocky Point.

John Halverson

3/5/2008

Update or Other Action

DEC received the "Semi-Annual Groundwater Monitoring and Operations and Maintenance Report - First Half 2007" from SECOR on behalf of Chevron. LNAPL continues to be observed in MWRP-22, MWRP-24, MWRP-28, MW-2 and MW-13; samples were not collected from these wells for laboratory analysis. Water samples from MWRP-33 and PC-2 continue to exceed the cleanup levels. Water samples were collected from the tunnels into tanks 12, 13, 17 and 18, valve house A, and two brick structures thought to be heater pits; water from these structures contains elevated concentrations of DRO, RRO, PAHs, and/or BTEX. The bioventing system on tank hill was not operating - it had been shut off for the winter and the power line was cut by a plow; based on a review of past performance data SECOR recommended discontinuing operation of the system and development of an alternative cleanup option. Soil in biocells 1 and 2 and the stockpile from Tank 2 was characterized, met cleanup levels, and the cells were decommissioned; the treated soil was stockpiled for use as on-site backfill during the pipeline closure project. The top 4 feet of soil in the Tank 12 Stockpile was sampled and met the site cleanup levels; the top 4 feet can be removed and used as on-site backfill and then the remainder of the stockpile needs to be characterized. Sorbent booms in the interception trench were changed out during the first quarter and were still in good condition during the second quarter.

John Halverson

5/30/2008

Exposure Tracking Model Ranking

Initial ranking with ETM completed.

Evonne Reese

6/11/2008

Update or Other Action

DEC received the Semi-Annual Areawide Groundwater Monitoring and Operations and Maintenance Report - Second Half 2007" prepared by SECOR for Chevron. Monitoring wells MWRP-11, MWRP-28 and PC-02 contained TAH and/or TAqH above the water quality standards. SECOR recommended additional excavation around MWRP-11 do remove residual contamination from the July 14, 2007 release. The in-situ bioventing system was not operated - SECOR evaluated the system and recommened (in the First Half 2007 Semi-Annual report) that it no longer be operated. Product removal using PetroTraps or a bailer included removing some sheen to ~1 liter of product from various MWs and piezometers; MWRP-24 had ~7.4 liters of product removed in the 4th quarter. The o/w separators were maintained.

John Halverson

6/30/2008

Update or Other Action

DEC received the "2007 Pipeline Closure Documentation Report..." prepared by Stantec on behalf of Chevron. The report documents work done to properly close abandoned fuel pipelines at the Rocky Point Tank Farm area. Approximately 18,200 lineal feet of pipeline was identified for closure in the workplan; an additional 10,021 feet of pipeline was identified during the fieldwork. A total of 18,021 feet of pipeline was removed. Site characterization and limited soil removal were conducted. Some of the valve houses were also cleaned and demolished. Two underground brick structures thought to be part of heater-pits were found to be transformer vaults; the transfomers were removed, sampled, determined to be non-PCB transformers and disposed of off-site; trace levels of PCB were found in water from one vault. Due to the increase in the amount of piping determined to be present, additional closure will be conducted in 2008.

John Halverson

3/30/2009

Update or Other Action

DEC received a copy of the "Semi-Annual Area Wide Groundwater Monitoring Report and O&M Report - First Half 2008" from Stantec, on behalf of Chevron. The report documents groundwater level and flow directions, generally stable or decreasing petroleum concentrations in groundwater, the presence of measurable LNAPL in 9 out of 61 monitoring wells that were gauged, residual petroleum contaminated water access tunnels to abandoned underground storage tanks 16, 17 and 18, and work done to maintain and evaluate the interception trench/product recovery system and the oil water separator system.

John Halverson

6/4/2009

Interim Removal Action Approved

DEC received the 2008 Pipeline Closure Report for the Rocky Point Management Area, prepared by Stantec for Chevron. The report documents removal or in-place closure of 23 pipelines (332 linear feet (LF) of above ground lines and 9,098 LF of below ground lines). Approximately 7,000 LF of pipe was removed from the ground and 2,400 LF closed in place. Approximately, 16,185 gallons of residual fuel were removed from the piping. Over 101,000 gallons of contaminated water from decontamination and dewatering activities were treated on-site and discharged. Over 400 soil samples were collected and analyzed. Eight appertenant structures (valve houses, pump houses, etc.) were cleaned and removed. Approximately 6,000 LF of inactive pipeline have been identified for future closure.

John Halverson

7/31/2009

Update or Other Action

DEC received the "Semi-Annual Area-Wide Groundwater Monitoring and Operations and Maintenance Report - Second Half 2008", from Stantec on behalf of Chevron. 59 monitoring wells were gauged for water level data and 33 MWs were sampled. Samples from three MWs exceeded the cleanup levels for groundwater discharging into surface water; the 30 other MWs did not exceed cleanup levels of 10 times the Table C levels (samples from 5 MWs exceeded the Table C levels). Eight MWs (four of which are in the Pre WWII Tank Farm Area {MW-2, MW-11, MW-13 and MW-16} and four within the Thermal Treatment Area {MWRP-22, MWRP-24, MWRP-28 and IWPZ-07}) contained measurable LNAPL and were not sampled. LNAPL thickness ranged from 0.04' to 2.78'. 5.85 liters of product were removed from the MWs in the Thermal Treatment area. Product mobility and recoverability are being evaluated. Five tank tunnels and ten valve houses have been inspected and water samples collected from them over time. Nine of the valve houses were removed during 2007-08; valve house H remains - no water was present in valve house H during the quarterly inspections. The tank tunnels were not sampled during the 2nd half of 2008. The bioventing system on Tank Hill remained off pending development of an alternative cleanup plan. Sorbent booms in the interception trench and on-site oil water seperator were inspected and replaced as necessary.

John Halverson

8/27/2009

Update or Other Action

Note to file 8-27-09. As per John Halverson I am cross-referencing five documents: 1. Phase 2 Characterization Workplan for East Point/Ballyhoo Road Rehabilitation Unalaska March 2000, Golder Associates; 2. Draft Phase 2 Site Characterization Unalaska: East Point/Ballyhoo Rd. Rehabilitation April 2001, Golder Associates; 3. Preliminary Engineering Study for the Relocation of Pipelines at The Dutch Harbor Facility, Unalaska; November 2001, Hattenburg & Dilley Engineering Consultants; 4. Phase 2 Site Characterization Unalaska: East Point/Ballyhoo Rd. Rehabilitation June 2003, Golder Associates; and 5. Corrective Action Plan for Unalaska: East Point/Ballyhoo Rd. Rehabilitation Unalaska December 2003, Golder Associates. These five documents are associated with the file number 2542.38.030 which is listed in the FileRoom database but not listed in the CS database. These five documents are filed in the CS files, in Anchorage, under file number 2542.38.030. This note will be placed in the three Hazard ID #’s: 509, 510, and 512 under CS file number 2542.38.018.

Pam Clemens

6/23/2010

Update or Other Action

The Annual Area-Wide Groundwater Monitoring and Operations and Maintenance Report - 2009 was recieved to ADEC. The report addressed groundwater contamination in the Rocky Point Management Area as well as maintenance of structures associated with the remedy. During the first half of 2009, 62 wells were gauged for LNAPL thickness and groundwater depth. Samples were collected from 32 wells and 5 wells exceeded cleanup levels for surface water. Eight wells had residual or measurable thickness of LNAPL, however some of these contained Bunker-C like material and were not removed. In second half 2009, 4 wells were installed during the Site Assessment and incorporated into the groundwater monitoring program. Monitoring was discontinued at Well PC-01 as a new well was installed in the area. Seven wells that were gauged had residual or measurable free product, one of these containing Bunker-C. The installation of MWRP-37 in the APL operations area called for recovery of 83.28 L of product. 57 wells were gauged and 32 were sampled in the second half of 2009. Five wells exceeded surface water cleanup levels in tank Hill area, Petes Creek, APL operations, and Thermal Treatment Area. O&M activities were performed on the OWS, the interceptor trench, tank tunnels, and the sedimentation basin. Boom was replaced as needed.

Meghan Dooley

8/20/2010

Update or Other Action

ADEC received the 2009 Site Assessment Documentation Report. A total of 106 locations were sampled with UVOST/LIF in the Rocky Point Managment Area to characterize extent of soil contamination. Four monitoring wells were installed and incorporated into the groundwater monitoring program. High DRO concentrations were found in the surface and subsurface and have the potential to be causing elevated levels downgradient. Tanks 13, 14, and 16 may be contributing to contamination near and downgradient of those areas.

Meghan Dooley

4/16/2012

Meeting or Teleconference Held

ADEC and ADOL staff met with Chevron and Delta Western to discuss the path forward for cleanup at Tank Hill, the Thermal Treatment Area, and MWRP-37. Chevron and Delta Western will submit a Focused Feasibility Study in August to address concerns at the sites.

Meghan Dooley

10/30/2012

Meeting or Teleconference Held

ADEC and ADOL met with Chevron and Delta Western to discuss the Focused Alternative Analysis for Tank Hill and the Thermal Treatment Area.

Meghan Dooley

11/27/2012

Document, Report, or Work plan Review - other

ADEC received the Focused Alternative Analysis on September 28. Following a meeting discussing the document, ADEC sent specific comments on November 27. The preferred alternative is long term monitoring and institutional controls. Major comments included what institutional controls will be proposed, and how they will be maintained and protective.

Meghan Dooley

1/22/2013

Document, Report, or Work plan Review - other

ADEC sent comments and a request for further action to Delta Western to clean and close tanks 12-18 and the associated tunnels and pipelines. The report detailed work completed to date in treating liquid drained from tanks 12-18 during the 2011 field season.

Meghan Dooley

12/20/2013

Update or Other Action

ADEC recieves response to comments regarding the Focused Alternatives Analysis for Tank Hill and for the Thermal Treatment Area (two seperate reports).

Meredith Savage

12/20/2013

Update or Other Action

ADEC recieves the document titled: "Closure Responsibility for Cut and Covered Tanks Utility Piping and Equipment, Rocky Point Management Area, Dutch Harbor, Unalaska, Alaska." Farallon Consulting submitted the document on behalf of Chevron Environmental Management Company and Delta Western. The document presents the argument that the US Army Corps is responsible for a large portion of the underground piping and heating facilities for the Cut and Covered Tanks 12-18 because neither Standard Oil (later Chevron)nor Delta Western used those facilities and that the heating and piping facilities were largely disfunctional by the time Standard Oil leased the site.

Meredith Savage

1/27/2014

Update or Other Action

ADEC provides a reply (and comments) to the RP's response to ADEC's original comments. ADEC states that while it accepts most of the RP responses to ADEC's original comments, there are several with which ADEC disagrees. The primary concerns are with the RP's scores for the Comparative Analysis of Alternatives and the resultant selection of preferrred remediation alternative (both sites), conclusions drawn from the linear regression analysis regarding plume behavior (Tank Hill site), extent of AOC 1 and 2 smear zones (TTA), RP's determination of water quality and quantity below the Rocky Point Management Area, and conclusions made based on comparisons of soils samples taken in different years from different soil depths. ADEC notifies RP of their intent to schedule a project planning meeting.

Meredith Savage

2/4/2014

Update or Other Action

ADEC sends out a meeting request to Chevron, Delta Western, Ounalashka Corporation, and the USACE, regarding closure responsibility for the Cut and Covered Tanks; the meeting is scheduled for the morning of March 18, 2014. A second meeting with between Delta Western, Chevron, and OC will be held in the afternoon to discuss the Focused Alternatives Analysis for Tank Hill and the TTA.

Meredith Savage

3/24/2014

Document, Report, or Work plan Review - other

Received draft Rocky Point Pipeline and Transformer CON/HTRW Removal Action Work Plan, Amaknak Island, Unalaska, Alaska. The work plan details all tasks associated with 1) removal of 2,375 to 3,875 feet of buried pipeline, 2) removal and disposal or recycling of 7,000 to 13,000 gallons of petroleum, oil, and lubricants (POL) product from pipelines, 3) removal, transport, and disposal of up to 15 tons of POL soil 4) removal and disposal of Valve House H, 5) removal of five to seven vaults and their contents and removal and disposal of 10 to 20 transformers.

Meredith Savage

6/11/2014

Document, Report, or Work plan Review - other

Review and comments sent out for draft Rocky Point Pipeline and Transformer CON/HTRW Removal Action Work Plan, Amaknak Island, Unalaska, Alaska.

Meredith Savage

7/31/2014

Document, Report, or Work plan Review - other

Received Revision 1 of Rocky Point Pipeline and Transformer CON/HTRW Removal Action Work Plan, Amaknak Island, Unalaska, Alaska. Final approval of the work plan sent out on July 31, 2014; approval contingent upon the addition of DRO, RRO, and VOC sample analysis within the transformer vaults.

Meredith Savage

8/26/2014

Document, Report, or Work plan Review - other

Received agreement from RP to conduct additional sampling within the transformer vaults.

Meredith Savage

8/28/2014

Document, Report, or Work plan Review - other

Received following document: RPMA - Notification to Collect Additional Site Characterization Data. Notification of the potential of conducting up to 10 soil borings within the Thermal Treatment Area in support of ongoing remedial efforts at the Rocky Point Management Area (RPMA).

Meredith Savage

11/5/2014

Document, Report, or Work plan Review - other

Received Cut and Covered Tank Tunnel Weir Inspection Summary, Rocky Point Management Area. The inspection report summarizes the weekly inspections of tunnel weirs for tanks 12, 13, 16, 17, and 18, for the time period from February 3 through August 29, 2014. All weirs are located at the entrance to the tank tunnels and all are operating as designed. Water levels within the tunnels was observed up to the tunnel weir one time at Tank 16 and several times at Tanks 13 and 17; On April 15, 2014, water was observed discharging from the tunnel at Tank 13, but no petroleum sheen or LNAPL was evident.

Meredith Savage

4/1/2015

Document, Report, or Work plan Review - other

The Alaska Department of Environmental Conservation (ADEC) received a report titled Rocky Point Pipeline and Transformer CON/HTRW Removal Action on February 12, 2015. The report summarizes the work entailed in the removal of various pipelines and a valve house within the Rocky Point area of Dutch Harbor and provides analytical results from soil and water sampling. Tasks completed in the 2014 field season include: pipelines 190, 208, 214, and 216 were entirely removed; pipelines 192, 209, and 215 were mostly removed; and Valve House H was entirely removed. The remaining sections of pipelines 192, 209, and 215 will be removed during the 2015 field season as will Concrete Vault 3, and contaminated soil from Vault 3 and Vault MH62. Vaults MH62 and MH63 will be closed in place in 2015. Contaminated soil remains at Pipelines 190, 192, and 208. ADEC has reviewed this report and accepts it as final.

Meredith Savage

4/1/2016

Document, Report, or Work plan Review - other

ADEC received the final report titled Removal Action Report for the Rocky Point Pipeline and Transformer CON/HTRW Removal Action on March 23, 2016. The report summarizes the work entailed in the removal of various pipelines and infrastructure within the Rocky Point Management Area of Dutch Harbor and provides analytical results from soil and water sampling. Tasks completed during the 2015 field season include the removal of pipelines 190, 192, 209, 208, 214, 215 and 216, the removal of Valve House H and Concrete Vault 3, and the in place closure of Transformer Vaults MH62 and MH63. This work completed the USACE CON/HTRW Removal Action which began in 2014. ADEC has reviewed this report and accepts it as final.

Holly Weiss-Racine

4/14/2016

Update or Other Action

ADEC sent a letter to Chevron and Delta Western requesting a Work Plan to take remedial action at the RPMA Cut and Cover Tanks (Tanks 12-18). The letter requested the preparation a Work Plan for the closure of the Cut and Cover tanks, associated utility tunnels, piping or equipment no later than May 31, 2016.

Holly Weiss-Racine

5/19/2016

Update or Other Action

ADEC received a letter from Chevron stating that Chevron and Delta Western would jointly prepare a Work Plan to evaluate the safety and technical challenges associated with the tank closure work, but not a work plan for the closure activities. Discussions concerning PRPs remains ongoing. Additionally, Chevron requested a work plan extension with a proposed deadline of August 31, 2016. ADEC approved this request.

Holly Weiss-Racine

6/15/2016

Document, Report, or Work plan Review - other

Approved the “Annual Area-Wide Groundwater Monitoring and Operations and Maintenance Report - 2014” for the RPMA. In 2016, Stantec will attempt to locate and repair damaged monitoring wells within the RPMA monitoring well network. If MWRP-18 is unrepairable, replacement of this monitoring well will be evaluated and results documented in subsequent groundwater monitoring reports.

Holly Weiss-Racine

11/4/2016

Document, Report, or Work plan Review - other

Approved the “Annual Area-Wide Groundwater Monitoring and Operations and Maintenance Report - 2015” for the RPMA. In 2016, Stantec will attempt to locate and repair damaged monitoring wells within the RPMA monitoring well network.

Holly Weiss-Racine

2/24/2017

Update or Other Action

Chevron submitted a "cut and cover tanks" site status update letter to DEC. Stantec personnel were on-site during November - December 2016 collecting 4th quarter groundwater monitoring and inspecting and collected data on the cut and cover tank systems. An assessment memo will be submitted by April 1, 2017 providing a summary the inspections, groundwater and utility tunnel water elevations, water quality data from samples collected within the tunnels, survey data, estimated water volumes in the tunnels, and a structural engineer's recommendations regarding measures to allow inspections/work in the tunnels.

John Halverson

5/31/2017

Update or Other Action

ADEC received the “Annual Area-Wide Groundwater Monitoring and Operations and Maintenance Report - 2016” for the RPMA by Stantec on behalf of Chevron and Delta Western.

Linda (Qi) Liu

9/6/2017

Document, Report, or Work plan Review - other

ADEC received Delta Western/Chevron Cut and Cover Tank Tunnel Weir Inspection Summary, October through December 2016, Rocky Point Management Area dated September 5, 2017. The weirs are operating as designed with underflow baffles to prevent discharge of floating LNAPL or sheen. No water was observed discharging from the utility tunnels for Tanks 12, 13, 16, 17, or 18 during the inspections conducted over the reporting period. Standing water was observed in contact with the weir but not discharging from the tunnel entrance for Tank 13 during the inspections conducted between October 29 and November 19, 2016 and on December 4, 21, and 28, 2016. Standing water was observed in contact with the weir but not discharging from the tunnel entrance for Tank 17 during the inspections conducted over the reporting period. No LNAPL or sheen was observed on the standing water in contact with the weirs, and no LNAPL or sheen was observed in standing water in other tunnels where surface water was visible. Standing water was not observed in contact with the weirs in Tanks 12, 16, or 18 during the inspections conducted over the reporting period.

Darren Mulkey

9/20/2017

Document, Report, or Work plan Review - other

ADEC received a Transformers and Pipeline CON/HTRW Closeout Report on 9/6/17 by email. ADEC approved the report but clarified that even though the pipeline removal project is associated with Haz ID 509, there are remaining contamination in the Tank Hill area. They need to be addressed under the multiple PRP agreement and the Tank Hill site won't be closed at this moment.

Linda (Qi) Liu

11/3/2017

Document, Report, or Work plan Review - other

ADEC received, commented and approved "Sampling and Analysis Plan for Groundwater Monitoring and Operations and Maintenance" for RPMA area. The plan was submitted by Stantec on behalf of Chevron and Delta Western.

Linda (Qi) Liu

7/2/2018

Update or Other Action

ADEC received the “Annual Area-Wide Groundwater Monitoring and Operations and Maintenance Report - 2017” for the RPMA by Stantec on behalf of Chevron and Delta Western.

Rachael Petraeus

10/10/2018

Document, Report, or Work plan Review - other

ADEC received CUT AND COVERED TANK TUNNEL WEIR INSPECTION SUMMARY OCTOBER THROUGH DECEMBER 2017. The weirs are operating as designed with underflow baffles to prevent discharge of floating LNAPL or sheen. No water was observed discharging from the utility tunnels for Tanks 12, 16, 17, or 18 during the inspections conducted over the reporting period. Water was observed discharging from the tunnel for Tank 13 on December 1, 15, 21, and 28, 2017, but no LNAPL or sheen were observed on the discharging water. Standing water was observed in contact with the weir but not discharging from the tunnel entrance for Tank 17 during each of the inspections over the reporting period. Standing water was not observed in contact with the weirs in Tanks 12, 16, or 18 during the inspections conducted over the reporting period.

Rachael Petraeus

2/21/2019

Update or Other Action

ADEC received "Cut and Covered Tank Tunnel Weir Inspection Summary July through September 2018 Rocky Point Management Area Dutch Harbor, Unalaska, Alaska" report dated February 18, 2019. The weirs are operating as designed with underflow baffles to prevent discharge of floating LNAPL or sheen. No water was observed discharging from the utility tunnels for Tanks 12, 13, 16, 17, or 18 during the inspections conducted over the reporting period.

Rachael Petraeus

4/12/2019

Document, Report, or Work plan Review - other

ADEC received "Cut and Covered Tank Tunnel Weir Inspection Summary October through December 2018 Rocky Point Management Area Dutch Harbor, Unalaska, Alaska" report dated April 10, 2019. The weirs are operating as designed with underflow baffles to prevent discharge of floating LNAPL or sheen. No water was observed discharging from the utility tunnels for Tanks 12 or 18 during the inspections conducted over the reporting period. Water was observed discharging from the tunnels for Tanks 13, 16, and 17 during the inspections on December 7 and 14, 2018 but no sheen or LNAPL was observed on the discharging water.

Rachael Petraeus

6/13/2019

Document, Report, or Work plan Review - other

On June 13, 2019, ADEC received "Cut and Covered Tank Tunnel Weir Inspection Summary January Through March 2019 Rocky Point Management Area Dutch Harbor, Unalaska, Alaska". The weirs are operating as designed with underflow baffles to prevent discharge of floating LNAPL or sheen. No water was observed discharging from the utility tunnels for Tanks 12 or 18 during the inspections conducted over the reporting period. Water was observed discharging from one of more of the tunnels for Tanks 13, 16, and 17 in several inspections during the reporting period but no sheen or LNAPL was observed on the discharging water.

Rachael Petraeus

8/19/2019

Document, Report, or Work plan Review - other

On August 19, 2019, ADEC received "Cut and Covered Tank Tunnel Weir Inspection Summary April through June 2019 Rocky Point Management Area Dutch Harbor, Unalaska, Alaska." No water was observed discharging from the utility tunnels for Tanks 12, 16 or 18 during the inspections conducted over the reporting period. Water was observed discharging from one of more of the tunnels for Tanks 13, and 17 in several inspections during the reporting period but no sheen or LNAPL was observed on the discharging water.

Rachael Petraeus

1/28/2020

Update or Other Action

ADEC received the transmittal letter "Rocky Point Management Area Weir Inspection Activities" dated December 20, 2019. The letter documents a request that , effective January 1, 2020, monthly weir inspections be completed for Tanks 12, 13, 16, 17 and 18 the Dutch Harbor Rocky Point Tank Farm rather than weekly weir inspections. ADEC approves the request for a 2 year period, with a requirement to assess water sample results taken during that time to determine if there is data variability in the water samples due to concentration fluctuations or sampling method. ADEC requests to include these water samples results in the annual groundwater monitoring reports. In addition, if new site inspection results indicate an observance of water with sheen being discharged from any of the tank tunnels and/or sample results indicate changes in concentration variability at the groundwater monitoring wells sampled, ADEC will request modifications in sampling frequencies in the future.

Rachael Petraeus

8/11/2021

Document, Report, or Work plan Review - other

Bulk action for all sites within the Rocky Point Management Area Operational Area Boundaries. ADEC received the Annual Area-Wide Groundwater Monitoring and Operation and Maintenance Report – 2020 for the Rocky Point Management Area in Dutch Harbor, Unalaska on May 26, 2021. Activities included inspection and maintenance of the Thermal Treatment Area (TTA) oil-water separator (OWS) and sedimentation basin; the East Point Loop Road (EPLR) OWS and sedimentation basin; and the TTA groundwater interceptor trench, collection vaults, and surface water drainage culverts. Light nonaqueous-phase liquid (LNAPL) recovery O&M activities at monitoring wells MWRP-24 and MWRP-37 are ongoing, and in 2020 were conducted on a monthly basis at monitoring well MWRP-24 and on a weekly basis at monitoring well MWRP-37. The frequency of the groundwater monitoring and O&M activities at the Rocky Point Management Area (RPMA) was reduced from semiannual to annual in 2019. ADEC recommends MWRP-15 is added to the list of wells to be sampled for Diesel Range Organics (DRO), Gasoline Range Organics (GRO), and Polycyclic Aromatic Hydrocarbons (PAHs). Additionally, ADEC requests some recommendations are provided regarding the access to monitoring wells, particularly those with free product historically observed. Several wells were unable to be sampled due to being located under shipping containers. Responses sent on July 16, 2021.

Cascade Galasso-Irish

2/23/2022

Document, Report, or Work plan Review - other

ADEC received the Cut and Covered Tank Tunnel Weir Inspection Summary January 2021 - December 2021 for RPMA, Technical Memorandum, on this date. Tanks 13, 16, and 17 were observed to have water with a sheen and globules of LNAPL. The weirs are operating as designed with underflow baffles to prevent discharge of floating LNAPL or sheen. No water was observed discharging from the utility tunnels for Tanks 12, 13, 16, 17 or 18 during the reporting period.

Cascade Galasso-Irish

7/7/2022

Document, Report, or Work plan Review - other

Bulk action entry for the RPMA - ADEC received the Annual Area-Wide Groundwater Monitoring and Operations and Maintenance Report – 2021 Rocky Point Management Area Dated April 2022. Annual groundwater monitoring is conducted at the Rocky Point Management Area (RPMA), and O&M operations also include the ongoing monthly light non-aqueous phase liquid (LNAPL) recovery at wells MWRP-24 and MWRP-37. Due to project organization changes since the last work plan was approved in 2017, ADEC requests an updated work plan be provided to ADEC for review and approval prior to the 2023 field efforts. In future reporting, ADEC requests the hazardous wastes and contaminated media derived from the RPMA groundwater monitoring are catalogued and a Transport, Treatment and Disposal form is provided to ADEC for review and approval in accordance with 18 AAC 75.325(i) when the wastes are transferred to a final destination. Per comment resolution, ADEC no longer supports discharge of purge water to the ground surface without granular activated carbon (GAC) treatment or being containerized and disposed of off-site. ADEC may approves foregoing soil sampling at this time if groundwater is handled appropriately in subsequent annual sampling. However, prior to site closure, soil sampling will need to occur to verify residual contamination is below current cleanup levels. ADEC concurs with the recommendations for the 2022 season in the cover letter submitted with the 2021 report. ADEC approved the final report on this date.

Cascade Galasso-Irish

11/15/2022

Document, Report, or Work plan Review - other

On November 15, 2019, ADEC received "Cut and Covered Tank Tunnel Surface Water Trend Analysis, Rocky Point Management Area, Dutch Harbor, Alaska." DRO and RRO were both found to have increasing trends in Tank Tunnel 13, and monthly inspections note sheen and LNAPL globules have been present, although not discharging from the tank tunnel at any point during 2021 inspections. The report recommends monthly monitoring of the tank tunnels continue for the next year (2023), and surface water sampling continue to be collected on an annual basis. GRO and BTEX have not been detected above Table C since 2008 and are recommended for removal from the sampling program.

Cascade Galasso-Irish

2/7/2023

Document, Report, or Work plan Review - other

Bulk action on Dutch Hbr - Rocky Point Tank Hill and Rocky Point Tanks 17-18. On this date, ADEC approved the Cut and Cover Tank Tunnel Surface Water Trend Analysis for the RPMA. 2022 results for Tank 17 indicate the highest detection of DRO since 2011, and the highest recorded measurement of RRO. 2022 sampling results show both DRO and RRO are an order of magnitude above the 2021 results. ADEC agreed with the recommendation to sample Wells MWRP-08 and MWRP-09 (groundwater wells nearest Tanks 17 and 18) in 2023 for additional information, and to collect and sample an additional set of surface water samples from Tank Tunnels 17 and 18 during a relatively high-water event to determine if the 2022 results were representative. ADEC also agreed with the continued annual sampling of surface water and with the removal of GRO and BTEX analytes from the surface water sampling.

Cascade Galasso-Irish

4/20/2023

Document, Report, or Work plan Review - other

Bulk action entry for RPMA sites - on this date, DEC received and approved the 2022 Final Annual Area-Wide Groundwater Monitoring and Operation Maintenance Report for the Rocky Point Management Area, Dutch Harbor, Unalaska, Alaska. This document also includes the 2022 Well Status Report (Appendix E), the 2022 Cut and Cover Tank Tunnel Surface Water Trend Analysis (Appendix F), and the 2022 Product Recovery Tech Memo (Appendix G). The document has been filed under the sitewide RPMA file, Rocky Point Tank Hill, Hazard ID 509.

Cascade Galasso-Irish

6/2/2023

Document, Report, or Work plan Review - other

On this date, DEC reviewed and approved the Final Sampling and Analysis Plan, Area-Wide Groundwater Monitoring and Operation and Maintenance Sampling and Analysis Plan, Rocky Point Management Area, Unalaska, Alaska.

Cascade Galasso-Irish

1/30/2024

Document, Report, or Work plan Review - other

Bulk action entry for annual RPMA groundwater monitoring sites - DEC received the Annual Area-Wide Groundwater Monitoring and Operation and Maintenance Report – 2023 for the Rocky Point Management Area in Dutch Harbor, Unalaska. DEC agreed with all recommendations, including another attempt to sample MWRP-08 and -09 to monitor if concentrations in Tank Tunnel 17 are migrating to the bay. DEC had no other comments and requested the final document for review once the product recovery memo and weir inspection reports are completed and appended to the document.

Cascade Galasso-Irish

Contaminant Information

Name

Level Description

Media

Comments

Control Type

Type

Details

Requirements

Description

Details

2022 Annual RPMA Groundwater Monitoring

2021 Annual RPMA Groundwater Monitoring

2022 Cut and Cover Tank Tunnel Surface Water Trend Analysis

Weir Inspection Report April to June 2019 2nd Quarter

Weir Inspection Report Jan-Mar 2019 1st Quarter

No associated sites were found.

Missing Location Data

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Site Report: Dutch Hbr-Rocky Point Tank Hill

Site Chronology

IC / Closure Details

Documents

Associated Sites

Problems/Comments

Action Information

Contaminant Information

Control Type

Requirements

2022 Annual RPMA Groundwater Monitoring

2021 Annual RPMA Groundwater Monitoring

2022 Cut and Cover Tank Tunnel Surface Water Trend Analysis

Weir Inspection Report April to June 2019 2nd Quarter

Weir Inspection Report Jan-Mar 2019 1st Quarter

Missing Location Data

State of Alaska Department of Environmental Conservation