Site Report: Dutch Hbr-Rocky Point Thermal Treat

Site Name:	Dutch Hbr-Rocky Point Thermal Treat
Address:	East Point Road, Unalaska, AK 99685
File Number:	2542.38.019
Hazard ID:	514
Status:	Active
Staff:	Sarah Bernhardt, 9072697527 sarah.bernhardt@alaska.gov
Latitude:	53.887444
Longitude:	-166.534849
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

This site at the base of Rocky Point tank hill is topographically downgradient from active and inactive tank farms, including many pipelines, valve houses and other fuel facilities. 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 and groundwater in the area. Product/sheen has discharged into the road ditch along East Point Road during and after significant rainfall events. Contractors working for the US Army Corps of Engineering intermittently operated a thermal treatment facility at the site between 1996 and 2002 to process petroleum contaminated soil. This area is shared responsibility (multiple potentially responsible party (PRP)) site involving the US Army Corps of Engineers (because it is a formerly used defense site (FUDS)), ChevronTexaco and Delta Western Fuels. Bruce Erickson, Mike Lewis and Jennifer Roberts are former site managers. The military built Dutch Harbor Naval Operating Base including larger 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". 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). Six large concrete USTs (~1 million gallons each) 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.

Action Information

Action Date	Action	Description	DEC Staff
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
8/15/1998	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
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
2/12/2000	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
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
6/16/2000	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. ADEC sent a separate 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, 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
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
6/21/2001	Update or Other Action	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
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
3/15/2002	Update or Other Action	DEC staff and an Assistant Attorney General met with the Corps, Delta Western and Chevron to disucss lack of timely characterization and cleanup at Rocky Point. Requested interim cleanup actions be implemented during 2002 and final cleanup plans be developed and implemented in 2003.	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; a focussed 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); on-going monitoring was recommended for the lower tank farm. It recommends preparing a closure report for the Upper Tank Farm Area.	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	Interim Removal Action Approved	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
1/23/2003	Site Added to Database	Rocky Point expanded from one site into nine unique sites in the database.	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 recommends continued groundwater monitoring in the lower tank farm area, but no active cleanup.	John Halverson
6/27/2003	Update or Other Action	DEC reviewed and commented on a draft Corrective Action Plan for Rocky Point.	Bob Glascott
7/14/2003	Cleanup Plan Approved	DEC received a revised final Corrective Action Plan for Rocky Point. It calls for excavating, and treating in a bio-remediation cell, petroleum contaminated soil along the pipeline corridors and thermal treatment area, installing a free product interceptor trench between the thermal treatment area and East Point Road, and installing a bioventing system in the Pete's Creek Drainage.	Bob Glascott
10/6/2003	Update or Other Action	DEC notified that fuel is again seeping into East Point Road ditch adjacent to the thermal treatment area.	John Halverson
10/16/2003	Update or Other Action	Chevron's contractor notified DEC the interception trench along East Point Road will not be installed until next year.	Bob Glascott
10/31/2003	Notice of Violation	NOV issued to Chevron for failure to contain and cleanup petroleum hydrocarbon releases at Rocky Point.	John Halverson
4/5/2004	Update or Other Action	DEC recieved the 2003 Cleanup Activities Report documenting installation of the barrier and gate system (~500 feet long) to intercept free product at the Thermal Treatment site to prevent discharging into the road ditch; recovered products and surface runoff are routed into a water treatment sytem. The report also describes pilot test results for bioventing at Pete's Creek drainage, construction of a biocell at the thermal treatment area, and additional site characterization work.	John Halverson
9/9/2004	Update or Other Action	DEC received an Interim Activities Report, Thermal Treatment Area Groundwater O&M, dated September 14, 2004. The report describes inspections, monitoring and maintenance on the interception curtain and product recovery efforts. Boom placement was modified to prevent getting hung-up on internal supports during water level fluctuation. Monitoring wells and piezometers were inspected; LNAPL present in 6 wells upgradient of the collection vaults and 5 well downgradient of the vaults, but at a lesser thickness. Recommendations include installation of more wells, proper development of all well, resurveying all wells, installation of petrotraps and data loggers.	John Halverson
10/20/2004	Update or Other Action	DEC received the draft Tunnel, Heater Pit, Valve House and Pump House sampling report from SECOR. It describes efforts to inspect and collect samples from these structures. Tunnels at tanks 12, 13, 16, 17 and 18 were inspected in June 2004 Standing water was observed at the entrance to each tunnel. Gates at each entrance were locked. Vent pipes into tunnels for tanks 12, 13 and 18 allowed sampling from tunnels or heater pits. • Tunnel 12 – 2,430 ug/L DRO •Tunnel 13 – 224 ug/L GRO, 2,640 ug/L DRO, 0.6 ug/L benzene, 18.3 ug/L ethylbenzene, 9.22 xylenes •Tunnel 18 – 7,770 ug/L DRO Tunnels for tanks 16 and 17 were not sampled due to blockages in the vent pipes and locked gates. Sampled from brick chimneys leading to two heater pits (D and G) – need to verify the design and what these lead into. •Heater pit D – 6,800 ug/L DRO, 3,000 ug/L RRO •Heater pit G – 425 ug/L DRO and B(a)P + Dibenzo(a,h)anthracene Ten valve houses (A through J) slated for inspection and sampling – could not access B, C, D, G, I and J; E and F were moist but not enough water to sample; A and H contained standing water and were sampled. •Valve House H – 104 ug/L GRO, 73,600 ug/L DRO, 5,750 ug/L RRO, 0.25 ug/L benzene, •Valve House A – 2,770 ug/L RRO Re-inspection and sampling are planned during the November groundwater sampling event - SECOR to coordinate with Delta Western to gain access to structures that were locked.	John Halverson
2/22/2005	Update or Other Action	DEC received the 4th Quarter Ex-situ Biocell Operations and Maintenance Activities Report, prepared by SECOR for ChevronTexaco. It describes operation of Biocell #1, containing ~325 cy of diesel contaminated soil. Fall sampling from the cell was not conducted due to weather constraints, but it continues to operate. Biocell #2 contains ~850 cy of petroleum contaminated soil; operation of this cell is planned to start in the spring of 2005.	John Halverson
2/28/2005	Update or Other Action	DEC received the 4th Quarter Thermal Treatment Area Groundwater O&M and New Well Installation Report, dated 2/14/05, by SECOR. It summarizes O&M work on the interception trench and product recovery gates.	John Halverson
3/10/2005	Update or Other Action	DEC received the Draft 2004 Field Activities Report for Rocky Point Management Area #1, by SECOR for ChevronTexaco. It documents installation of an in-situ bioventing system in Pete's Creek Drainage (scheduled for startup in spring 2005), excavation of ~850 cy of petroleum contaminated soil from the pipeline corridor and placement in a biocell at the thermal treatment area, free product sampling and characterization, installation of additional monitoring wells and piezometers around the interception trench and other Rocky Point locations, and on-going O&M work.	John Halverson
3/16/2005	Update or Other Action	DEC approved the draft Semi-annual Groundwater Monitoring Report - 1st Half 2004 for the Rocky Point Management Area #1.	John Halverson
3/16/2005	Update or Other Action	DEC reviewed and approved the draft Tunnel, Heater Pit and Valve House sampling report prepared by SECOR, dated Oct. 2004. The report documents petroleum contaminated water in several of the pipeline related structures at Rocky Point. Further investigation is planned for summer of 2005.	John Halverson
3/16/2005	Update or Other Action	DEC reviewed and approved a draft sampling report on the access tunnels, heater pits and valve houses associated with the fuel tanks and lines. Petroleum contaminated water is present within several of the structures. DEC requested a joint site inspection with the PRPs during the next groundwater monitoring event, which is scheduled in early May 2005.	John Halverson
3/29/2005	Update or Other Action	The City of Unalaska called DEC and reported encountering fuel sheen adjacent to the thermal treatment yard when grading the road ditch along East Point Road.	John Halverson
6/10/2005	Update or Other Action	File number issued 2542.38.019.	Aggie Blandford
11/30/2005	Update or Other Action	DEC approved shutdown of the biocells located on the thermal treatment area. Soil in the upper portion of the biocells meets cleanup levels. A plan for additional characterization of soil in the lower portion of the cells was requested prior to dismantling the biocells.	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 calculated 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
11/17/2006	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
7/17/2007	Interim Removal Action 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
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
6/2/2008	Exposure Tracking Model Ranking	Initial ranking with ETM completed.	Evonne Reese
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
10/1/2008	Site Visit	DEC inspected the Rocky Point pipeline closure work with representatives from Stantech (consultants to Chevron), Entact (subcontractor removing/closing the lines), the Corps of Engineers, Delta Western and Ounalashka Corporation. Most of the abandoned pipelines within the Rocky Point area have been closed; exceptions are the lines Chevron has determined were only used by the federal government and lines beneath the APL yard. Also, the aqua fuel system #2 line from the power house to the airport and portions of a 3"" diameter line from the APL yard to Margaret Bay still need to be closed. Approximately 130 cy of petroleum contaminated soil is stockpiled on-site in a long term stockpile. Soil from the biocell and tank 12 release has been sampled, meets the site specific cleanup levels, and moved to a temporary pile for beneficial use as backfill on-site. The valve houses and pumphouse (Bld 575) have been removed. Pipes have been decontaminated and given to others on-island for beneficial reuse. Soil/groundwater cleanup plans still need to be developed and implemented - field work has been focussed on removing the lines which were sources for on-going or future releases.	John Halverson
1/23/2009	Update or Other Action	Stantec submitted a report titled "Documentation Report for Waste Management and Assessment During Electrical Conduit Excavation and Assessment for Tank 2" on behalf of Chevron. The report documents work conducted in 2006. SECOR was hired to conduct sampling analysis and waste management during installation of an electrical line from East Point Road behind the lower tank farm to a new fuel pumphouse. Several fuel pipelines were encountered and are depicted in a figure in the report. LNAPL was observed in in a several locactions including in soil ~500' from the start of the trench and in groundwater seepage into the trench at ~570', 630', 675' and 700' from the start of the trench. The product was reported as appearing Bunker C-like material. Petroleum contaminated soil from the excavation was segregated and stockpiled in the Thermal Treatment area (Tank 2 Stockpile). Soil samples collected from the electrical line trench and test pits around Tank 2 did not contain petroleum at levels above the site specific cleanup levels (8,250 mg/kg DRO, 8,300 mg/kg RRO, and 1,400 mg/kg GRO).	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. During decommissioning of the Tank 12 soil stockpile, petroleum odors were noted. An additional 42 soil samples were collected and analyzed; all samples met the site specific alternative soil cleanup levels. The soil was them moved to a separate stockpile for benficial reuse on-site.	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
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. Contamination was mainly DRO and found in the surface and subsurface. Light fuel signatures as well as benzo(a)pyrene were also detected. Contamination appears to be mainly contained between the toe of the slope and upgradient near both PCA and VH-F.	Meghan Dooley
10/30/2012	Meeting or Teleconference Held	ADEC and ADOL attended a meeting with Chevron and Delta Western to discuss the Focused Alternative Analyses for the Thermal Treatment Area and Tank Hill.	Meghan Dooley
12/18/2012	Document, Report, or Work plan Review - other	ADEC sent comments on the draft Focused Alternative Analysis for the Thermal Treatment Area. ADEC is concerned about offsite migration of contaminants and how it impacts improvements to the right of way. ADEC is also concerned about the potential extent of contamination at the smear zone.	Meghan Dooley
6/27/2016	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
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
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
4/22/2019	Update or Other Action	On April 22, 2019 ADEC received the “Annual Area-Wide Groundwater Monitoring and Operations and Maintenance Report - 2019” for the RPMA by Stantec on behalf of Chevron and Delta Western.	Rachael Petraeus
9/27/2019	Update or Other Action	On September 27, 2019 ADEC received the above referenced transmittal letter dated September 27, 2019. The letter documents a request that, effective this year, one annual groundwater sampling event in May is appropriate rather than two semi-annual groundwater sampling events. ADEC approves the request. A review of the historical site data indicates that groundwater monitoring events in the Rocky Point Management Area have a long-term trend of concentrations showing little variability due to seasonal impacts. However, if new site groundwater monitoring results indicate increasing concentrations or changes in concentration variability at the groundwater monitoring wells sampled as part of the annual monitoring program, ADEC will request modifications in sampling frequencies in the future.	Rachael Petraeus
12/9/2019	Exposure Tracking Model Ranking	Initial ranking with ETM completed for source area id: 71493 name: Thermal treatment facility	Rachael Petraeus
1/26/2021	Update or Other Action	CS web map coordinates updated on this date.	Cascade Galasso-Irish
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
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

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

8/15/1998

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

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

2/12/2000

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

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

6/16/2000

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. ADEC sent a separate 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, 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

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

6/21/2001

Update or Other Action

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

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

3/15/2002

Update or Other Action

DEC staff and an Assistant Attorney General met with the Corps, Delta Western and Chevron to disucss lack of timely characterization and cleanup at Rocky Point. Requested interim cleanup actions be implemented during 2002 and final cleanup plans be developed and implemented in 2003.

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; a focussed 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); on-going monitoring was recommended for the lower tank farm. It recommends preparing a closure report for the Upper Tank Farm Area.

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

Interim Removal Action Approved

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

1/23/2003

Site Added to Database

Rocky Point expanded from one site into nine unique sites in the database.

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 recommends continued groundwater monitoring in the lower tank farm area, but no active cleanup.

John Halverson

6/27/2003

Update or Other Action

DEC reviewed and commented on a draft Corrective Action Plan for Rocky Point.

Bob Glascott

7/14/2003

Cleanup Plan Approved

DEC received a revised final Corrective Action Plan for Rocky Point. It calls for excavating, and treating in a bio-remediation cell, petroleum contaminated soil along the pipeline corridors and thermal treatment area, installing a free product interceptor trench between the thermal treatment area and East Point Road, and installing a bioventing system in the Pete's Creek Drainage.

Bob Glascott

10/6/2003

Update or Other Action

DEC notified that fuel is again seeping into East Point Road ditch adjacent to the thermal treatment area.

John Halverson

10/16/2003

Update or Other Action

Chevron's contractor notified DEC the interception trench along East Point Road will not be installed until next year.

Bob Glascott

10/31/2003

Notice of Violation

NOV issued to Chevron for failure to contain and cleanup petroleum hydrocarbon releases at Rocky Point.

John Halverson

4/5/2004

Update or Other Action

DEC recieved the 2003 Cleanup Activities Report documenting installation of the barrier and gate system (~500 feet long) to intercept free product at the Thermal Treatment site to prevent discharging into the road ditch; recovered products and surface runoff are routed into a water treatment sytem. The report also describes pilot test results for bioventing at Pete's Creek drainage, construction of a biocell at the thermal treatment area, and additional site characterization work.

John Halverson

9/9/2004

Update or Other Action

DEC received an Interim Activities Report, Thermal Treatment Area Groundwater O&M, dated September 14, 2004. The report describes inspections, monitoring and maintenance on the interception curtain and product recovery efforts. Boom placement was modified to prevent getting hung-up on internal supports during water level fluctuation. Monitoring wells and piezometers were inspected; LNAPL present in 6 wells upgradient of the collection vaults and 5 well downgradient of the vaults, but at a lesser thickness. Recommendations include installation of more wells, proper development of all well, resurveying all wells, installation of petrotraps and data loggers.

John Halverson

10/20/2004

Update or Other Action

DEC received the draft Tunnel, Heater Pit, Valve House and Pump House sampling report from SECOR. It describes efforts to inspect and collect samples from these structures. Tunnels at tanks 12, 13, 16, 17 and 18 were inspected in June 2004 Standing water was observed at the entrance to each tunnel. Gates at each entrance were locked. Vent pipes into tunnels for tanks 12, 13 and 18 allowed sampling from tunnels or heater pits. • Tunnel 12 – 2,430 ug/L DRO •Tunnel 13 – 224 ug/L GRO, 2,640 ug/L DRO, 0.6 ug/L benzene, 18.3 ug/L ethylbenzene, 9.22 xylenes •Tunnel 18 – 7,770 ug/L DRO Tunnels for tanks 16 and 17 were not sampled due to blockages in the vent pipes and locked gates. Sampled from brick chimneys leading to two heater pits (D and G) – need to verify the design and what these lead into. •Heater pit D – 6,800 ug/L DRO, 3,000 ug/L RRO •Heater pit G – 425 ug/L DRO and B(a)P + Dibenzo(a,h)anthracene Ten valve houses (A through J) slated for inspection and sampling – could not access B, C, D, G, I and J; E and F were moist but not enough water to sample; A and H contained standing water and were sampled. •Valve House H – 104 ug/L GRO, 73,600 ug/L DRO, 5,750 ug/L RRO, 0.25 ug/L benzene, •Valve House A – 2,770 ug/L RRO Re-inspection and sampling are planned during the November groundwater sampling event - SECOR to coordinate with Delta Western to gain access to structures that were locked.

John Halverson

2/22/2005

Update or Other Action

DEC received the 4th Quarter Ex-situ Biocell Operations and Maintenance Activities Report, prepared by SECOR for ChevronTexaco. It describes operation of Biocell #1, containing ~325 cy of diesel contaminated soil. Fall sampling from the cell was not conducted due to weather constraints, but it continues to operate. Biocell #2 contains ~850 cy of petroleum contaminated soil; operation of this cell is planned to start in the spring of 2005.

John Halverson

2/28/2005

Update or Other Action

DEC received the 4th Quarter Thermal Treatment Area Groundwater O&M and New Well Installation Report, dated 2/14/05, by SECOR. It summarizes O&M work on the interception trench and product recovery gates.

John Halverson

3/10/2005

Update or Other Action

DEC received the Draft 2004 Field Activities Report for Rocky Point Management Area #1, by SECOR for ChevronTexaco. It documents installation of an in-situ bioventing system in Pete's Creek Drainage (scheduled for startup in spring 2005), excavation of ~850 cy of petroleum contaminated soil from the pipeline corridor and placement in a biocell at the thermal treatment area, free product sampling and characterization, installation of additional monitoring wells and piezometers around the interception trench and other Rocky Point locations, and on-going O&M work.

John Halverson

3/16/2005

Update or Other Action

DEC approved the draft Semi-annual Groundwater Monitoring Report - 1st Half 2004 for the Rocky Point Management Area #1.

John Halverson

3/16/2005

Update or Other Action

DEC reviewed and approved the draft Tunnel, Heater Pit and Valve House sampling report prepared by SECOR, dated Oct. 2004. The report documents petroleum contaminated water in several of the pipeline related structures at Rocky Point. Further investigation is planned for summer of 2005.

John Halverson

3/16/2005

Update or Other Action

DEC reviewed and approved a draft sampling report on the access tunnels, heater pits and valve houses associated with the fuel tanks and lines. Petroleum contaminated water is present within several of the structures. DEC requested a joint site inspection with the PRPs during the next groundwater monitoring event, which is scheduled in early May 2005.

John Halverson

3/29/2005

Update or Other Action

The City of Unalaska called DEC and reported encountering fuel sheen adjacent to the thermal treatment yard when grading the road ditch along East Point Road.

John Halverson

6/10/2005

Update or Other Action

File number issued 2542.38.019.

Aggie Blandford

11/30/2005

Update or Other Action

DEC approved shutdown of the biocells located on the thermal treatment area. Soil in the upper portion of the biocells meets cleanup levels. A plan for additional characterization of soil in the lower portion of the cells was requested prior to dismantling the biocells.

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 calculated 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

11/17/2006

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

7/17/2007

Interim Removal Action 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

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

6/2/2008

Exposure Tracking Model Ranking

Initial ranking with ETM completed.

Evonne Reese

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

10/1/2008

Site Visit

DEC inspected the Rocky Point pipeline closure work with representatives from Stantech (consultants to Chevron), Entact (subcontractor removing/closing the lines), the Corps of Engineers, Delta Western and Ounalashka Corporation. Most of the abandoned pipelines within the Rocky Point area have been closed; exceptions are the lines Chevron has determined were only used by the federal government and lines beneath the APL yard. Also, the aqua fuel system #2 line from the power house to the airport and portions of a 3"" diameter line from the APL yard to Margaret Bay still need to be closed. Approximately 130 cy of petroleum contaminated soil is stockpiled on-site in a long term stockpile. Soil from the biocell and tank 12 release has been sampled, meets the site specific cleanup levels, and moved to a temporary pile for beneficial use as backfill on-site. The valve houses and pumphouse (Bld 575) have been removed. Pipes have been decontaminated and given to others on-island for beneficial reuse. Soil/groundwater cleanup plans still need to be developed and implemented - field work has been focussed on removing the lines which were sources for on-going or future releases.

John Halverson

1/23/2009

Update or Other Action

Stantec submitted a report titled "Documentation Report for Waste Management and Assessment During Electrical Conduit Excavation and Assessment for Tank 2" on behalf of Chevron. The report documents work conducted in 2006. SECOR was hired to conduct sampling analysis and waste management during installation of an electrical line from East Point Road behind the lower tank farm to a new fuel pumphouse. Several fuel pipelines were encountered and are depicted in a figure in the report. LNAPL was observed in in a several locactions including in soil ~500' from the start of the trench and in groundwater seepage into the trench at ~570', 630', 675' and 700' from the start of the trench. The product was reported as appearing Bunker C-like material. Petroleum contaminated soil from the excavation was segregated and stockpiled in the Thermal Treatment area (Tank 2 Stockpile). Soil samples collected from the electrical line trench and test pits around Tank 2 did not contain petroleum at levels above the site specific cleanup levels (8,250 mg/kg DRO, 8,300 mg/kg RRO, and 1,400 mg/kg GRO).

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. During decommissioning of the Tank 12 soil stockpile, petroleum odors were noted. An additional 42 soil samples were collected and analyzed; all samples met the site specific alternative soil cleanup levels. The soil was them moved to a separate stockpile for benficial reuse on-site.

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

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. Contamination was mainly DRO and found in the surface and subsurface. Light fuel signatures as well as benzo(a)pyrene were also detected. Contamination appears to be mainly contained between the toe of the slope and upgradient near both PCA and VH-F.

Meghan Dooley

10/30/2012

Meeting or Teleconference Held

ADEC and ADOL attended a meeting with Chevron and Delta Western to discuss the Focused Alternative Analyses for the Thermal Treatment Area and Tank Hill.

Meghan Dooley

12/18/2012

Document, Report, or Work plan Review - other

ADEC sent comments on the draft Focused Alternative Analysis for the Thermal Treatment Area. ADEC is concerned about offsite migration of contaminants and how it impacts improvements to the right of way. ADEC is also concerned about the potential extent of contamination at the smear zone.

Meghan Dooley

6/27/2016

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

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

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

4/22/2019

Update or Other Action

On April 22, 2019 ADEC received the “Annual Area-Wide Groundwater Monitoring and Operations and Maintenance Report - 2019” for the RPMA by Stantec on behalf of Chevron and Delta Western.

Rachael Petraeus

9/27/2019

Update or Other Action

On September 27, 2019 ADEC received the above referenced transmittal letter dated September 27, 2019. The letter documents a request that, effective this year, one annual groundwater sampling event in May is appropriate rather than two semi-annual groundwater sampling events. ADEC approves the request. A review of the historical site data indicates that groundwater monitoring events in the Rocky Point Management Area have a long-term trend of concentrations showing little variability due to seasonal impacts. However, if new site groundwater monitoring results indicate increasing concentrations or changes in concentration variability at the groundwater monitoring wells sampled as part of the annual monitoring program, ADEC will request modifications in sampling frequencies in the future.

Rachael Petraeus

12/9/2019

Exposure Tracking Model Ranking

Initial ranking with ETM completed for source area id: 71493 name: Thermal treatment facility

Rachael Petraeus

1/26/2021

Update or Other Action

CS web map coordinates updated on this date.

Cascade Galasso-Irish

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

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

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Alaska Department of Environmental Conservation

Site Report: Dutch Hbr-Rocky Point Thermal Treat

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State of Alaska Department of Environmental Conservation