Site Report: Tesoro Ocean Dock Terminal - Port of Anchorage

Site Name:	Tesoro Ocean Dock Terminal - Port of Anchorage
Address:	1076 Ocean Dock Road, Anchorage, AK 99501
File Number:	2100.38.310
Hazard ID:	1473
Status:	Active
Staff:	Michael Hooper, 9074515174 michael.hooper@alaska.gov
Latitude:	61.230200
Longitude:	-149.893800
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

Widespread petroleum contaminated soil and groundwater at this Port of Anchorage fuel terminal. As of April 1, 2004 Flint Hills Resources is the owner and operator of the Port of Anchorage terminal. As of June 2016, Tesoro is the owner and operator of the Port of Anchorage Terminal. Administrative order on consent (US EPA Docket No. CERCLA 10-2004-0065) signed on this date to include ARRC terminal, Area 3 & designated lease properties. On April 20, 2014, 4,273 gallons of gasoline was released near the East Tank Farm pump skid when an in-line filter that supplies gasoline to a truck failed. Within 24 hours an estimated 1,171 gallons of product was recovered off the ground with a vacuum truck. The gasoline release impacted 5,500 square feet of surface area surrounding the concrete pump and equipment skid. The depth of impact from the gasoline spray was thought to 0.5 feet over much of the area but extended deeper to the groundwater interface at 2 feet bgs in some locations specifically to the north, northeast, and east of the pump skid (Spill# 14239910901 transferred from PPRP 1/23/15). On July 23, 2014, a release of Jet-A fuel occurred north of the west tank farm, evident by free product day lighting in the old, unlined, asphalt tank farm. The source of the release was a leak from underground piping running between the rail and the west tank farm (note: this site is also known as Spill# 14239920401, which still needs to be transferred to the CSP by PPRP as of 3/25/16).

Action Information

Action Date	Action	Description	DEC Staff
1/5/1999	Update or Other Action	Letter from Pete Hellstrom advising Department of name change from MAPCO to Williams Alaska Petroleum effetive Dec. 8, 1998	Eileen Olson
1/6/1999	Update or Other Action	More information on the historical use of this area can be found under file #2100.38.163 for Chugach Electric Association Lease.	Bill O'Connell
12/20/1999	Site Added to Database	Petroleum.	Eileen Olson
1/25/2000	Site Ranked Using the AHRM	Initial ranking.	Eileen Olson
6/26/2000	Site Ranked Using the AHRM	After discussion with DB Administrator, changed the SW Environments value from 0 to 2 and the GW Usage Value from 0.1 to 0.8. Now a High Priority site.	Eileen Olson
7/3/2000	Update or Other Action	Changed site name to "Port of Anchorage Williams Facility" from "Williams/Mapco Facility" to better identify which tank farm this is.	Eileen Olson
11/8/2000	Update or Other Action	Approval granted to backfill excavation for contaminated soils and free product on groundwater discovered at the Asphalt Pad during an October utility excavation. Work plan	Eileen Olson
11/15/2000	Update or Other Action	Asphalt Pad: Received email from Williams stating that wells in immediate area of the seep have been sampled and no free product was found, and that sampling report would be mailed.	Eileen Olson
8/29/2001	Site Characterization Workplan Approved	Work Plan approved for evaluation of product at old topping unit pad, plan dated July 23, 2001	Eileen Olson
5/15/2002	Update or Other Action	Workplan approval and notification that cleanup levels granted contingent on submittal of a risk assessment (never submitted) are rescinded.	Eileen Olson
11/22/2002	Update or Other Action	DEC letter sent approving use of approximately 1200 cubic yards of stockpiled soil as fill at Williams Terminal #1, Port of Anchorage, and reminder that Alternative Cleanup Levels conditionally granted in the Department's March 12, 1998 letter to PUG members are rescinded.	Eileen Olson
3/28/2003	Update or Other Action	Discussion with consultant regarding pre-purchase environmental audit (Frontier considering purchase of Williams terminal). Staff relayed that cleanup levels not established for soil or groundwater since risk assessment not submitted. Cleanup levels were rescinded as per May 15, 2002 letter.	Eileen Olson
1/14/2005	Update or Other Action	Well Installation and GW Assessment Report received by DEC and PM changed to Nuechterlein.	Linda Nuechterlein
1/19/2005	Update or Other Action	Above report contained results of most recent GW sampling conducted in October 2004. Water samples were collected from 25 MWs, including 5 newly installed wells, and analyzed for GRO, DRO, RRO and BTEX. Overall, samples from 12 MWs contained petroleum hydrocarbons concentrations that exceed DEC GW cleanup levels. Generally results indicate a stable or downward trend in concentrations with the exception of monitoring wells B9MW and B12MW which suggests the plume is not delineated in this area to the north. The next GW monitoring event is scheduled for May 2005.	Linda Nuechterlein
1/27/2005	Meeting or Teleconference Held	DEC meeting with John Hellen (FH) and site inspection of the Flint Hills Anchorage Terminal. Meeting topics included a review Anchorage terminal spill history, discussion of contamination issues, & results of the latest GW monitoring effort. During facility inspection, the location of monitoring wells, including 5 new MWs installed in Oct. 2004 was noted. Flint Hills will be submitting a work plan to install two additional monitoring wells in the North Tank Farm area. Tentative schedule to install these wells is in March 2005.	Linda Nuechterlein
2/18/2005	Update or Other Action	Shannon & Wilson installing two new monitoring wells at the FHR facility on Friday, Feb 18. Based on groundwater samples exceeding cleanup levels at B12MW, two wells will installed due west to reestablish a perimeter monitoring well network. Report will be submitted to DEC mid-March.	Linda Nuechterlein
8/9/2005	GIS Position Updated	Spatial data obtained by Shannon & Wilson. Township, Range and Quadrangle info from Alltopo. GPS'd gate Entrance.	S&W
4/20/2006	Site Characterization Workplan Approved	2006 work plan for GW monitoring at Flint Hills approved.	Bill O'Connell
6/27/2006	Site Characterization Report Approved	Received May 2006 Groundwater Monitoring Report. Petroleum hydrocarbons above Table C in 5 of the 8 wells sampled. Sentry wells MW-26 and B33MW show stable contaminants levels below Table C values.	Bill O'Connell
4/3/2007	Update or Other Action	Recieved October 2006 groundwater monitoring report for 1076 Ocean Dock Road. Groundwater samples were collected from 12 monitoring wells and a statistical analysis of contaminant concentrations in individual wells was conducted to evaluate trends. Statistical analysis indicates no apparent trends in the wells that were included in the analysis indicating the contaminant concentrations in these wells is stable. However, DRO and RRO exceeded Table C cleanup levels in B32MW, a sentinel well where these analytes had not exceeded Table C values in the past. Additionally, sentinel well B33MW contained detectable concentrations of DRO and RRO where none had been detected previously. Contaminant concentrations in B31MW along the south western edge of the property exceed Table C values for DRO and RRO indicating offsite migration may be occurring.	Bill O'Connell
4/6/2007	Update or Other Action	Recieved 2007 Groundwater Monitoring Work Plan for 1076 Ocean Dock Road. Monitoirng well B32MW will be added to the spring monitoring event so that all of the sentinel wells along the west side of the facility are monitored at the same time. Results of 2006 monitoring indicate increasing contaminant concentrations in these sentinel wells so additional data was requested to evaluate potential contaminant migrations. A total of 11 wells will be sampled in Spring 2007, with an additional 7 wells added for the annual monitoring event scheduled for fall 2007.	Bill O'Connell
5/10/2007	Exposure Tracking Model Ranking	Initial ranking completed	Bill O'Connell
9/5/2007	Site Characterization Report Approved	Recieved Spring 2007 monitoring report and completed QA/QC checksheet. Samples were collected from 17 of the 27 accessible monitoring wells at the site. 11 of the 17 wells sampled contained hydrocarbon concentrations above ADEC Table C cleanup levels including historically high concentrations of DRO in MW-14 at 84.7 mg/l and MW-19 at 21.9 mg/l, RRO in MW-14 at 7.70 mg/l and benzene in MW-24 at 0.123 mg/l. Hydrocarbon concentrations in sentinel wells remained relatively stable since 2006.	Bill O'Connell
9/12/2007	Meeting or Teleconference Held	Meeting today with Chevron, Flint Hills, ARRC, EPA, ADEC, consultants, and attorneys to discuss risk assessment at Flint Hills and Chevron Port of Anchorage Facilities. Risk assessment is being conducted to fulfill ARRC's obligations to EPA under the AOC. Flint Hills and Chevron will be contacting ADEC in the near future to discuss scoping of risk assessment.	Bill O'Connell
11/29/2007	Site Characterization Workplan Approved	Surface soil sampling work plan approved for Flint Hills Port of Anchorage. Approximately 23 soil samples will be collected and analyzed for DRO, GRO, RRO, EDB, VOCs, PAHs, and lead. Data will be used to characterize surface soil for risk assessment.	Bill O'Connell
2/29/2008	Update or Other Action	Received Fall 2007 groundwater monitoring report for FHR, 1076 Ocean Dock Road, QA/QC conducted. Groundwater samples were collected from 20 monitoring wells, including each of the sentinel wells along the western edge of the property. Hydrocarbon concentrations above Tabel C cleanup levels were recorded in 10 of the wells sampled including an exceedance of RRO in one of the sentinel wells. Overall, contaminant concentrations are consistent with previous monitoring events. Statistical analyses conducted on several of the wells with 8 or more positive sampling results did not indicate clear trends.	Bill O'Connell
7/1/2008	Update or Other Action	Final Risk Assessment Work Plan recevied by ADEC.	Bill O'Connell
9/17/2008	Site Characterization Report Approved	Received Spring 2008 Groundwater Monitoring Report. Groundwater samples were collected from 9 of the 27 accessible wells during the spring event.Hydrocarbon concentrations above Table cleanup levels were detected in 5 of the 9 wells sampled and the results are generally consistent with previous results with DRO detectred up to 10.8 mg/l in MW-14, GRO up to 3.96 in MW-2 and benzene up to 0.122 mg/l in MW-19. Sentinel wells B27MW and B33MW did contain detectable concentrations of hydrocarbon contaminants	Bill O'Connell
9/19/2008	Site Characterization Workplan Approved	Reviewed workplan for installation of sentry wells along west side of facility. Three wells will be installed and sampled and the data will be included in the Fall 2008 monitoring report.	Bill O'Connell
1/9/2009	Document, Report, or Work plan Review - other	Received draft Risk Assessment Report for Flint Hills Bulk Fuel Terminal at the Port of Anchorage. The results of the RA do not indicate carcinogenic or non-carcinogenic risk to any receptors above benchmark values. ADEC provided comments to the draft RA which are anticipated to be resolved in the Final Report. In addition to the RA, a groundwater use determination under 18 AAC 75.350 was requested. A decision on the groundwater use determination will be made in conjunction with review of the final RA Report	Bill O'Connell
2/24/2009	Document, Report, or Work plan Review - other	Received Fall 2008 Sentry Well Installation and Groundwater Monitoring Report. Three new monitoring wells were installed along the western edge of the property to monitor plume migration towards Cook Inlet.Groundwater samples were collected at these and 22 existing wells in October 2008. Contaminants were not detected in soil or groundwater at the new sentry wells. In the other 22 wells sampled, GRO was detected up to 7.08 mg/l in MW5, DRO was detected up to 6.73 mg/l in MW14, RRO was detected up to 3.60 mg/l in MW4 and benzene was detected up to 0.625 mg/l in MW5. A statistical analysis of individual wells with 8 or more data points indicates the plume is generally stable,however DRO and RRO were detected above the cleanup level for the first time in B30MW along the southern boundary of the property	Bill O'Connell
4/21/2009	Site Characterization Workplan Approved	Reviewed 2009 Groundwater Monitoring Work Plan for 1076 Ocean Dock Road. Two groundwater monitoring events will be conducted in 2009. Twelve wells will be sampled in the spring and fall, with an additional thirteen wells sampled only during the fall event.	Bill O'Connell
7/30/2009	Risk Assessment Report Approved	Final RA Report Approved, approval of 350 goundwater use determination is pending.	Bill O'Connell
8/15/2009	Update or Other Action	Final RA approved	Bill O'Connell
9/15/2009	Document, Report, or Work plan Review - other	Reviewed May 2009 Groundwater Monitoring Report. Samples were collected from 12 MWs, B33MW could not be located. Analytical results were generally consistent with historical results. DRO was detected up to 6.88 mg/l in MW14, GRO was detected up to 4.61 mg/l in MW2, and benzene was detected up to 0.06 mg/l in MW19. Contaminant concentrations in some wells appear directly related to groundwater elevation.	Bill O'Connell
10/30/2009	Document, Report, or Work plan Review - other	Draft Feasibility Study reviewed. The FS was conducted as a focused FS with limited alternatives considered based on current and anticipated future land use. The selected alternative is Institutional Controls, however implementation of the selected remedy will be done in conjunction with EPA and ARRC, as this lease property is subject to the EPA AOC in place with ARRC.	Bill O'Connell
2/2/2010	350 Determination	Groundwater use determination under 18 AAC 75.350 granted for the Flint Hills Port of Anchorage Terminal. Under this determination, the water in the shallow aquifer has been demonstrated to be non-potable and is therefore not considered a current or future use of drinking water.	Bill O'Connell
4/26/2010	Document, Report, or Work plan Review - other	Reviewed Revised Draft Feasibility Study for Flint Hills Resources. The primary revision is the addition of Groundwater Monitoring to Alternative #2, Institutional Controls, making the selected alternative Institutional Controls with Groundwater Monitoring. The selected alternative would provide for a deed notice, covenant, or restriction on the property so that groundwater may not be accessed as a drinking water source and include annual groundwater monitoring of a selected number of wells to monitor contaminant trends.	Bill O'Connell
5/13/2010	Long Term Monitoring Established	Per the Selected Alternative from the Feasibility Study, monitoring wells MW1, MW4, MW5, MW9, B31MW, B34MW, B35MW, and B36MW will be monitored on an annual basis for DRO, GRO, RRO, and BTEX. A five year review will be conducted in 2015 to determine if the monitoring schedule is appropriate.	Bill O'Connell
8/3/2010	Document, Report, or Work plan Review - other	Work plan approved for deommissioning of monitoring wells not needed for annual monitoring.	Bill O'Connell
11/12/2010	Document, Report, or Work plan Review - other	Reviewed Well Decommissioning work plan addendum. Because some of the monitoring wells are within the lined, secondary containment area, they will be decommissioned by filling the entire casing with grout so as not to necessitate repairing the liner after removal.	Bill O'Connell
5/18/2011	Document, Report, or Work plan Review - other	Reviewed 2010 Monitoring Well Decommissioning and Groundwater Sampling Report. 22 monitoring wells not needed for long term monitoring were decommissioned. Monitoring wells that were within the lined areas were only filled with grout and the casings were left in place because qualified personnel were not available to repair the liner. Groundwater samples were collected from monitoring wells MW1, MW4, MW5, MW9, B31MW, B35MW, and B36MW; well B34MW was submerged and not sampled. DRO was detected up to 11.3 mg/l at MW4, GRO was detected up to 7.79 mg/l at MW5, and benzene was detected up to 1.14 mg/l, also at MW4. Data was generally consistent with previous results, however some wells showed historic high concentrations of DRO.	Bill O'Connell
3/21/2012	Document, Report, or Work plan Review - other	Reviewed July 2011 Groundwater monitoring Report for Flint Hills Port of Anchorage bulk fuel facility. Samples were collected from 8 monitoring wells and analyzed for DRO, GRO, RRO, and VOCs. Contaminants were detected above Table C cleanup levels in 3 of the 8 wells sampled, with DRO detected up to 10.7 mg/l, GRO up to 5.26 mg/l, and benzene up to 0.311 mg/l, all in the sample from well MW5. The sentinel wells B34MW, B35MW, and B36MW did not contain detectable concentrations of contaminants, except xylenes, which were detected in B35MW at 0.0007 mg/l, below the Table C cleanup level of 10 mg/l. The data is consistent with historical results, the next monitoring event is scheduled for July 2012.	Bill O'Connell
11/28/2012	Document, Report, or Work plan Review - other	Reviewed July 2012 groundwater monitoring report for Flint Hills Anchorage Terminal. Seven of the eight monitoring wells designated for long term monitoring were sampled; well B31MW was observed to be full of soil and was not sampled. GRO was detected up to 4.37 mg/l in MW5, RRO up to 1.67 mg/l in MW4, DRO up to 6.36 mg/l in MW5 and benzene up to 0.562 mg/k in the same well. Only wells MW4 and MW5 located near Ocean Dock road contained contaminants above cleanup levels. Sentinel wells B34MW and B36MW contained detectable concentrations of DRO and RRO, but the analytical results are estimates and are both below the cleanup level. Sentinel well B35 MW did not contain detectable concentrations of contaminants. The report recommends B31MW be decommissioned. It is anticipated that this well will be reinstalled in 2013. The 2012 sampling results are consistent with previous results	Bill O'Connell
8/8/2013	Update or Other Action	On this date, ADEC received the “WORK PLAN FOR MONITORING WELL INSTALLATION AND DECOMMISSIONING, FLINT HILLS RESOURCES ALASKA ANCHORAGE TERMINAL, ANCHORAGE, ALASKA” submitted by S&W dated July 16, 2013. The objectives of this project are to decommission Well B31MW and install replacement Well B31MW-R. The work will occur during the annual groundwater monitoring and well survey activities to occur during the summer 2013.	Grant Lidren
4/21/2014	Potentially Responsible Party/State Interest Letter	Potentially Responsible Party / State Interest Letter sent by PERP staff John Brown to Flint Hills Resources Alaska, LLC for spill no. 14239910901.	Mitzi Read
4/25/2014	Site Visit	On this date, ADEC met with Flint Hills and Shannon and Wilson at the "FHRA Fuel Rack Gas Spill". Approximately 4,273 gallons of gasoline spilled onto approximately 5,500 square feet of soil on April 19th 2014. PERP is currently working with Flint hills to cleanup contaminated soil and groundwater. Groundwater is 2 feet bgs and contains free product.	Grant Lidren
7/23/2014	Site Visit	The CSP and PERP met with Flint Hills and visited and took pictures of the site on this date. The tank farm contained black petroleum odor product on the surface water. Emerald was on the scene sucking up the oily water with a vacuum truck. Source area of the contamination is unknown. This tank farm was built in the 1960s and does not contain a liner.	Grant Lidren
7/24/2014	Site Visit	The CSP and PERP met with Flint Hills and visited and took pictures of the site on this date. The source area is suspected to be an underground pipeline leaking Jet-A fuel. The pipelines supplying Jet-A have been shut. The vacuum truck is still recovering free product and test pitting to the shallow groundwater at 2 to 4 ft. bgs has begun to determine the source area and the extent of contamination. Test pits down gradient of the tank farm contain black colored free product. It is suspected that the black colored free product is from asphalt in the ground leaching off from the Jet-A acting as a solvent. One of the test pits did contain clear Jet-A product. This test pit is the suspected area of the pipe leakage which will be further investigated.	Grant Lidren
7/30/2014	Site Visit	CSP, PERP, and IPP met with Flints Hills and Shannon and Wilson at the site on this date. During the site visit, contaminated soil was being excavated around a pipe suspected of the Jet-A-release. However testing of the pipe has been inconclusive thus far; source area is still unknown. Contaminated soil is still being excavated to the best extent practical. The full extent of contamination is unknown, particularly towards the tank farm to the south.	Grant Lidren
8/11/2014	Site Visit	Site visit on this date. Source area was traced to a leak in a jet fuel pipeline at the "Candy Cane" low-point drains that are located between the Tri-Palace and West Pump skid north of the West Tank Farm SCA.	Grant Lidren
8/14/2014	Meeting or Teleconference Held	CSP, IPP, and PERP attended a meeting at Flint Hills on this date. Flint Hills plans to fill the pipelines where the spill occurred with concrete and abandoned in place. New above ground pipelines will be completed by the end of 2014. Continued cleanup actions and characterization was also discussed. Free product was noted in the pipeline excavation and fire shed testpit during the visit. Additionally, it appeared a slight sheen was present in testpit 9C located downgradient of the pipeline excavation. However, it was not determined if this sheen was associated with the Jet-A spill event or was from historic contamination.	Grant Lidren
10/22/2014	Site Visit	On this date, CS, PERP and IPP met S&W and FHR onsite. Approximately 6,000 gallons of free product has been recovered. Excavations had been filled in and recovery sumps and observation wells were installed. The furthest west recovery sump and observation well located adjacent to the West Pump Skid contained the most significant free product. Emerald is removing product twice a day. S&W collected soil samples at the smear zone where possible prior to filling in of the trenches. Significant free product was still "weeping" into the excavation during backfilling.	Grant Lidren
1/15/2015	Site Characterization Report Approved	On this date, ADEC received the East Tank Farm Gasoline Spill Response Flint Hills Resources Alaska Anchorage Terminal submitted by Shannon & Wilson dated January 2015. Soil and free product removal was conducted April 20th to May 2nd 2014. Groundwater was encountered where excavations were advanced lower than 2 feet bgs. A Total of 505 drums, 1,300 gallons of free product, and 587 gallons of contaminated groundwater were transported offsite for treatment. Soil and groundwater characterization samples were conducted by S&W in April and May 2014. Groundwater samples collected from historic monitoring wells MW1, MW4, MW5, and MW9 were all below table C groundwater cleanup levels except MW5 which contained GRO at 2.49 mg/L and benzene at 0.178 mg/L. Groundwater flow was generally west. Contaminated soil was excavated 3 to 6 inches in most areas around the pump skid, but was excavated up to 3 feet bgs along the north and west containment wall. Confirmation soil samples and water samples from test holes contained significant contamination based off the presence of free product in some areas and analytical soil sample results. Thirty-four confirmation soil samples collected from the five excavations contained GRO up to 1,870 mg/kg, DRO up to 7,390 mg/kg. RRO up to 1,850 mg/kg, benzene up to 14.2 mg/kg, toluene up to 764 mg/kg, ethylbenzene up to 984 mg/kg, and xylenes up to 1,269 mg/kg. Contamination is located to the east, north, west and southwest of the pump skid. The excavation and test holes were brought back to grade with clean fill during Fall 2014.	Grant Lidren
1/20/2015	Site Characterization Report Approved	On this date, ADEC received the 2013 Well Decommissioning, Installation, and Monitoring 1076 Ocean Dock Road Report submitted by S&W dated January 2015 (note: this work was completed in 2013). The field activities consisted of decommissioning monitoring well B31MW, installing and developing replacement well B31MW-R, converting wells B35MW and B36MW from flush-mount to stick up monuments, and sampling seven of the eight groundwater monitoring wells designated for long term monitoring. The wells in the monitoring program include Wells MW1, MW4, MW5, MW9, B31MW-R, B34MW, B35MW, and B36MW. Well B34MW was not sampled because it was under surface water. Six of the eight monitoring wells contained detectable concentrations of petroleum constituents. MW5, the most contaminated of these six MWs, contained GRO at 7.79 mg/L, DRO at 5.76 mg/L, RRO at 2.74 mg/L, and benzene at 0.586 mg/L. A hydrocarbon odor was noted in MW-5 and B31MW-R. A soil sample collected 1 foot above the groundwater interface at 1.5 feet bgs during the advancement of replacement well B31MW-R contained detectable RRO but below cleanup levels (Note: this soil sample is considered bias low because it was collected with a vac truck).	Grant Lidren
1/26/2015	Spill Transferred from Prevention Preparedness and Response Program	Spill transferred by PERP staff John Brown. Spill no. 14239910901; spill date = 4/19/14; substance = gasoline; quantity = 4,273 gallons; source = fuel filter vessel, East Tank Farm; spill ledger code = 14347060.	Mitzi Read
2/12/2015	Offsite Soil or Groundwater Disposal Approved	As of this date, contamination generated during cleanup activities at the 4/21/14 Gas rack spill was transported to the appropriate facilities. ASR accepted 363 drums (102.62 tons) of non-hazardous contaminated soil for thermal remediation. Ross Incineration (licensed TSD Facility) accepted a total of 142 drums of hazardous soils for incineration. Emerald recovered an estimated 1,300 gallons of free product and 587 gallons of contaminated groundwater for treatment.	Grant Lidren
4/23/2015	Update or Other Action	On this date, ADEC received the Jet Fuel Spill Response, Flint Hills Resources Alaska, Anchorage Terminal submitted by Shannon & Wilson dated April 2, 2015. The Report pertains to confirmation soil sampling from the Asphalt Tank Farm Secondary Containment Area after initial response activities excavated an area of 1,800 square feet. Confirmation soil sampling was limited by: a concrete pad and a berm containing water, stairs, piping, asphalt, puddled storm water with sheen, a ponded area with absorbent boom, and active petroleum seepage and recovery efforts. Eleven soil samples collected contained DRO up to 15,300 mg/kg. All other detectable concentrations of petroleum constituents were below method two soil cleanup levels.	Grant Lidren
7/27/2015	Site Characterization Report Approved	On this date, ADEC received the 2014 Groundwater Monitoring 1076 Ocean Dock Road Report submitted by S&W dated July 2015 (note: this work was completed in 2014 ). The field activities included long term sampling of monitoring wells MW1, MW4, MW5, MW9, B31MW-R, B34MW, B35MW, and B36MW. Monitoring wells MW1, MW4, MW5, and MW9, were sampled again in 2014 to monitor the impacts to groundwater from the April FHRA Fuel Rack Gas Spill. All of the monitoring wells contained detectable concentrations of petroleum constituents. MW5, the most contaminated of these MWs, contained GRO at 5.38 mg/L, DRO at 6.03 mg/L, and benzene at 0.415 mg/L. A hydrocarbon sheen and odor were noted in MW-5 and B31MW-R respectively. Sentinel monitoring wells B34MW, B35MW, and B36MW adjacent to Knik Arm contained detectable levels of BTEX. These monitoring wells have historically been non-detect. Groundwater flow was generally to the west-southwest.	Grant Lidren
8/31/2015	Document, Report, or Work plan Review - other	On this date, ADEC received the FHR Release Investigation (RI) Report Anchorage Terminal dated August 28, 2015 submitted by Arcadis. This RI was conducted to characterize two 2014 spill events: the April east tank farm gas rack spill and the July Jet-A pipeline spill. The amount of Jet Fuel released is unknown, but at least 8,835 gallons have been recovered. The amount of gas released at the ETF gas rack spill was approximately 4,273 gallons. A total of 35 soil borings were advanced with eight completed as temporary monitoring wells to determine locations of permanent monitoring wells. Four soil borings adjacent to the east tank farm were not completed due to proximity to railroad tracks. Soil samples were collected from borings based off laser induced fluorescence screening results. At the WTF, SB-123 adjacent to 2014 excavation area contained the highest concentrations of contaminants with DRO above ingestion/inhalation. At the ETF, boring SB-132 down gradient of the 2014 excavation area contained the highest concentration of contaminants with toluene, xylenes, and GRO above ingestion/inhalation. Thirteen groundwater samples were collected from the eight temporary MWs. All of the temporary monitoring wells contained contaminant concentrations above Table C groundwater cleanup levels except SB-111 located west of the WTF middle. The other seven temporary MWs contained GRO up to 4.29 mg/L, DRO up to 163 mg/L, and benzene up to 0.129 mg/L. Based off this data, six permanent monitoring wells were installed: MW-201 to MW-207. These new monitoring wells and the historic monitoring wells MW1, MW4, MW5, MW9, B31MW-R, B34MW, B35MW, and B36MW were sampled February 2015. Only upgradient MW-1 and the downgradient sentinel wells B34MW, B35MW, and B36MW contained contaminant concentrations below Table C groundwater cleanup levels. Twelve groundwater samples collected from the 10 contaminated monitoring wells contained GRO up to 47 mg/L, DRO up to 4.59 mg/L, RRO up to 1.15 mg/L and benzene up to 0.968 mg/L. (Note: this groundwater sampling event is for the first quarter of 2015.)	Grant Lidren
8/31/2015	Site Characterization Report Approved	On this date, ADEC received the West Tank Farm Jet Fuel Spill Response FHR Anchorage Terminal dated July 2015 submitted by Shannon & Wilson. This Report discusses field activities conducted between July 22, 2014 and May 26, 2015 including: installation of a NAPL recovery system, free product recovery and groundwater potentiometric surface evaluation sections. The NAPL recovery system was installed within two trenches that were excavated as part of the initial response. The trenches were converted to collection trenches with two sumps for collection and removal of free product. FHRA reported 8,835 gallons of product had been recovered via vacuum truck as on April 7, 2015 and over 147 cubic yards of contaminated soil was removed from the two trenches. Continued product recovery into 2015 has stabilized to 1/8 inch or less. Seven observation wells were installed within and around the recovery trenches. Contaminated soil was removed to a depth of 8 feet bgs during install. Measurable NAPL was observed in observation well: OW1, OW2t, OW3, and OW5t and a sheen was present in OW6 and OW7. The most significant product was measured in OW3, located north of recovery sump RS2, up to 0.65 foot on January 2, 2015 and decreased to a sheen by April 13, 2015 with rising GW levels. Eight soil samples were collected as part of the NAPL recovery trench installation. Two soil samples collected 6 to 7 feet bgs at test hole OW4 for lateral delineation adjacent to the West Tank farm did not contain contaminant concentrations above cleanup levels. Six soil samples collected 3 to 6.3 feet bgs during the collection trench and observation holes installations contained GRO up to 1,280 mg.kg, DRO up to 13,500 mg/kg, and benzene up to 0.608 mg/kg.	Grant Lidren
1/6/2016	Site Characterization Report Approved	On this date, ADEC received the 2015 Annual Groundwater Monitoring Summary Report Port of Anchorage Terminal submitted by Arcadis dated January 5, 2016. The report discusses: LNAPL recovery; LNAPL measurements from observation wells; and second, third, and fourth quarterly groundwater monitoring from onsite monitoring wells in 2015. LNAPL was recovered via the two recovery sumps five days a week from 1/15 to 6/15 then twice a week from 6/15 to 10/15 then passive sorbents to present date. From 7/10/15 to 12/4/15, measurable LNAPL was observed in observation well: OW2t and OW5t and a sheen was present in OW1. During the second quarter on 5/26/15, nine of the 17 MWs sampled contained contaminant concentrations above Table C cleanup levels with GRO up to 7.56 mg/L (MW-206), DRO up to 7.55 mg/L (B31MW-R), and benzene up to 0.482 mg/L (MW-206). During the third quarter on 8/11/15, 11 of the 19 MWs sampled contained contaminant concentrations above Table C cleanup levels. MW-206, located adjacent to the fueling rack contained the most significant concentrations with GRO at 37.5 mg/L, DRO at 11.5 mg/L, and benzene at 1.18 mg/L (note: sentinel monitoring well B36MW contained DRO at 3.29 mg/L, which is the first time one of the three sentinel MWs have contained contaminant concentrations above table C cleanup levels). During the fourth quarter on 11/11/15, eight of the 18 MWs sampled contained contaminant concentrations above Table C cleanup levels with GRO up to 20.2 mg/L (MW-206), DRO up to 3.85 mg/L (B31MW-R), and benzene up to 0.308 mg/L (MW-5). (note: sentinel monitoring well B36MW contained DRO at 0.200 mg/L, which is below table C cleanup levels).	Grant Lidren
6/16/2016	Site Characterization Report Approved	On this date, ADEC received the First Semiannual 2016 Groundwater Monitoring Flint Hills Resources AK, LLC Report submitted by Arcadis dated June 2016. The field activities included long term sampling of monitoring wells MW-201 to MW-207, MW1, MW4, MW5, MW9, B31MW-R, B34MW, B35MW, B36MW, OW-4, OW-6, and OW-7. Sheen was noted in observation wells OW-1, OW-2t, OW-3, and OW-5t and were therefore not sampled. Groundwater flow was generally to the west-southwest near the east tank farm and west tank farm and to the northwest near the north tank farm. Seven of the MWs contained contaminant concentrations above cleanup levels. MW-206 located at the east tank farm, the most contaminated MW, contained GRO at 85.3 mg/L, DRO at 8.13 mg/L, benzene at 4.08 mg/L and toluene at 31.9 mg/L. Sentry wells B34MW, B35MW, and B36MW adjacent to Knik Arm were sampled within one hour of high tide. B34MW and B35MW contained detectable levels of GRO, toluene, and xylenes.	Grant Lidren
10/17/2016	Site Characterization Workplan Approved	On this date, ADEC received and approved the groundwater monitoring work plan submitted by Trihydro and dated October 17, 2016. The onsite monitoring wells will be sampled the week of October 24, 2016.	Grant Lidren
10/17/2016	Update or Other Action	The Flint Hills Resources Alaska (FHRA) Anchorage Terminal has changed ownership. Tesoro Alaska Company is the new owner and the facility is now named the Tesoro Ocean Dock Terminal - Port of Anchorage (POA). The file remains 2100.38.310.	Darren Mulkey
1/24/2017	Document, Report, or Work plan Review - other	Review of the Tesoro Ocean Dock Terminal - Port of Anchorage, 2016 Fall Groundwater Monitoring Report, submitted by Trihydro, dated January 18, 2017. Gauging data indicates groundwater levels decreased on average by 0.17 feet between spring and fall sampling events, similar to yearly fluctuations in the area. Groundwater flow patterns remain consistent with past quarters, suggesting west-southwest trend near the East Tank Farm and West Tank Farm and northwest trend near the North Tank Farm. LNAPL was detected in OW-1, OW-2t, OW-5t, OW-6, and OW-7 during the October 2016 monitoring event. The measurements are consistent with historical records and are associated with 2014 West Tank Farm Jet A fuel release. Eight onsite monitoring wells exceed the ADEC groundwater cleanup levels for a combination of BTEX, GRO, DRO, and RRO. BTEX and GRO appear to be primarily associated with the East Tank Farm pump release as well as with historical releases near the railcar loading rack and the warehouse. RRO and DRO appear to be associated with the West Tank Farm Jet A fuel release and historical releases near the railcar loading rack. Overall, analytical results in October 2016 are consistent with historical sampling results. The lateral extent of benzene above the groundwater cleanup level is also consistent with historical sampling results. The decrease in the ADEC cleanup level for benzene from 5 to 4.6 µg/L did not have a noticeable effect on the lateral extent of benzene above the cleanup level. Additionally, benzene remains the primary BTEX compound above the ADEC cleanup level.	Darren Mulkey
5/1/2017	Document, Report, or Work plan Review - other	Reviewed Work Plan for 2017 Field activities at Tesoro Ocean Dock Terminal. 15 groundwater monitoring wells will be sampled in spring and fall 2017 for DRO/RRO/GRO/BTEX and the free product recovery wells associated with the 2014 pipeline release will be evaluated for decommissioning.	Bill O'Connell
7/27/2017	Document, Report, or Work plan Review - other	Reviewed 2017 Well Removal and Decommissioning Work Plan for Tesoro Ocean Dock Terminal. Recovery and observation wells associated with a 2014 pipeline release will be removed because recoverable product is no longer present in the wells. Wells to be removed include RS1, RS2, RS3, RS4, OW-1, OW-2t, OW-3, OW-5t. Observation wells OW-4, OW-6, and OW-7 will be retained for future groundwater monitoring efforts.	Bill O'Connell
8/25/2017	Document, Report, or Work plan Review - other	Reviewed soil management plan for Tesoro Ocean Dock Rd terminal. Tanks T-4219, T-4218, T-4220 and T-3108 will be demolished and up to 793 cy of petroleum contaminated soil will be segregated and stockpiled. Contaminated soil will be treated at ASR, soil with a PID reading of less than 10 ppmv will be reused as backfill.	Bill O'Connell
10/17/2017	Document, Report, or Work plan Review - other	Reviewed Work Plan for Potential Contaminated Soil and Groundwater Management at Tesoro Ocean Dock Terminal Wastewater System Project. The project consists of the construction of a 150 linear foot sanitary sewer line that collects wastewater from the Truck Loading and Rail Car Loading rack containment areas. Field screening will be conducted every 25 feet at a minimum at depths ranging from 1 to 7.5 feet bgs and segregated in the field into two lined and covered stockpiles based on suspected degree of contamination. Soil that is suitable for use as backfill will be placed back into the excavation, with the top two feet of material being clean, uncontaminated fill. Excess soil or soil not suitable for reuse will be stockpiled and sampled to determine disposal options. If excavation dewatering is required, Tesoro will either discharge the water to the sanitary sewer system under a permit from AWWU or containerize and transport the water to an approved treatment facility.	Bill O'Connell
2/14/2019	Site Characterization Workplan Approved	The Alaska Department of Environmental Conservation (ADEC) has completed its review of the 2019 groundwater monitoring workplan included with the 2018 Annual Report (Appendix E) and has no objections to the workplan.	Chelsy Passmore
2/14/2019	Site Characterization Workplan Approved	The Alaska Department of Environmental Conservation (ADEC) has completed its review of the 2019 groundwater monitoring workplan included with the 2018 Annual Report (Appendix F) and has no objections to the workplan.	Chelsy Passmore
2/6/2020	Document, Report, or Work plan Review - other	2019 groundwater monitoring report was submitted with this date. BTEX, GRO, DRO, and RRO exceeded cleanup levels in 8 onsite monitoring wells. No product was observed in the monitoring wells. Three new wells were installed as part of the Spill Prevention, Control, and Countermeasure Program. These wells included MW-208, MW-209, and MW-210.	Janice Wiegers
3/25/2020	Document, Report, or Work plan Review - other	Soil was excavated as part of a sewer line and rail pan repair project. Trihydro submitted a report detailing this work dated 3/6/2019. Soil was put into three stockpiles based on field screening results. Upon completion of the work stockpiled soil was sampled per ADEC Field Sampling Guidance. Stockpiles consisted of one approximately 600 cubic yard impacted pile, and two piles of non-impacted soil with a total of 200 cubic yards of soil. The soil in the impacted pile was then taken to Alaska Soil Recycling for remediation and soil from the non-impacted piles was used in a beneficial reuse on site. Groundwater dewatering also occurred during the repair project. Groundwater recharge was slow and less than 18,000 gallons of water was dewatered from the excavation. Water was sampled and then discharged to the AWWU sanitary sewer per the permit.	Chelsy Passmore
7/30/2020	Offsite Soil or Groundwater Disposal Approved	Approved transport of 40 gallons of purge water to US Ecology, Viking Facility for solidification and disposal in Idaho.	Janice Wiegers
11/6/2020	Offsite Soil or Groundwater Disposal Approved	DEC approved transport of 40 gallons of purge water to U.S. Ecology for solidification and disposal at their facility in Idaho.	Janice Wiegers
11/25/2020	Update or Other Action	Notified by the Municipality of Anchorage in a letter dated 11/19/2020 that contaminated groundwater associated with this site and the site Crowley Facility Port of Anchorage (Haz ID 605) appears to be getting into the stormwater system. The MOA is working with these parties to repair the drains.	Janice Wiegers
2/22/2021	Workplan Requested	ADEC Requested a work plan by March 22, 2021 in coordination with the MOA to remediate the continued release of contaminated groundwater to MOA's storm drain system and prevent migration to surface water. Request was concurrently sent to Crowley Facility Port of Anchorage site (Hazard ID: 605).	Jamie Grant
4/14/2021	Meeting or Teleconference Held	Annual meeting with Marathon/Tesoro, Trihydro, and DEC Project Managers to review monitoring results and activities reported in 2020 and discuss plans moving forward for 2021.	Jamie Grant
5/5/2021	Document, Report, or Work plan Review - other	Reviewed a 2020 Annual Groundwater Monitoring Report for Tesoro Ocean Dock Terminal. Groundwater levels were measured during sampling events which indicate seasonal variations in groundwater elevations indicate that groundwater elevations. Typically elevations are lower in the winter and rise during spring into late summer. In the spring, groundwater flows northwest near the East and North Tank Farms and flows southwest near the West Tank Farm. In the fall, groundwater flows southwest near the East and West Tank Farms and flows north-northwest near the North Tank Farm. These flow directions are generally consistent with historical data. Measurable thicknesses of Light non-aqueous phase liquid (LNAPL) were not observed in monitoring wells in 2020. One or more of the following analytes were detected in groundwater samples collected from 9 of the 15 onsite monitoring wells and from 1 of the 3 SPCC wells. at concentrations exceeding cleanup levels: benzene, toluene, ethylbenzene, and xylenes (BTEX) gasoline range organics (GRO), diesel range organics (DRO), and residual range organics (RRO). Samples from downgradient boundary wells B34MW, B35MMW, and B36MW were collected within one hour of low tide and there were no detections above cleanup levels. Benzene concentrations in well MW-5 continue to remain below 1,000 µg/L since fall of 2018, Well MW-4 located on the northwest corner of the warehouse building continued to fluctuate in 2020 with spring and fall concentrations of ND and 51 µg/L, MW-207 concentrations have remained below initial values of around 40 µg/L with spring and fall results of 13.8 and 6.76 µg/L. In wells MW-205 and MW-206 near the East Tank Farm, benzene has been detected since 2015 when the wells were installed following the fuel headers release. Well MW-205 benzene concentrations continued to fluctuate, but are below 150 µg/L. Well MW-206 has had a benzene concentration spike as high as 4,080 µg/L (2016), 2020 results were below 70 µg/L. DRO has historically been detected at well B31MW and replacement well B31MW-R. After a spike of 8.52 mg/L in 2015, concentrations between 2016 and 2020 average ~3 mg/L. RRO in well B31MW and B31MW-R has fluctuated between ND to just above ADEC Cleanup Level, with results of 1.18 mg/L and 1.45 mg/L in the 2020 spring and fall events. The three SPCC wells installed in 2019, MW-208, MW-209, and MW-210, were analyzed in both 2020 sampling events for BTEX, GRO, DRO, and RRO. All results were ND or below ADEC Cleanup Level except RRO in MW-210 in the fall 2020 sampling event which was above the cleanup level (1.1 mg/L) at 1.12 mg/L. Groundwater results from 2020 are generally consistent with historical sampling results with concentrations fluctuating between spring and fall events	Jamie Grant
5/6/2021	Document, Report, or Work plan Review - other	Reviewed the Sampling and Analysis Plan for annual (2021) groundwater monitoring activities. The SAP was approved with the following condition: RP to modify sample collection method from bailer to one approved in the Field Sampling Guidance (ADEC, 2019) to prevent loss of volatiles.	Jamie Grant
6/10/2021	Update or Other Action	MOA Submitted additional sampling data to better understand storm drain infiltration. Analytical data indicates that COCs detected at MH-74 along Ocean Dock Road and (upstream of original contamination discovered at MH-26), were all below action levels. Where storm drains along West Bluff Drive and Ocean Dock Road intersect, MH-26 was sampled and the benzene concentration was 29.2 ug/L. Continuing downgradient along Ocean Dock Road, MH-28 was sampled and the benzene concentration was 109 ug/L (previous results were 120 ug/L). The section of the storm drain that originates from Government Hill and runs along West Bluff Drive was also evaluated at MH-32 and MH-197 where benzene concentrations were 6.67 ug/L and 5.07 ug/L.	Jamie Grant
6/30/2021	Meeting or Teleconference Held	On this day DEC and Tesoro met to discuss storm drain infiltration, analytical data, and a plan to move toward a solution.	Jamie Grant
11/23/2021	Offsite Soil or Groundwater Disposal Approved	40 gallons of purge water, generated between June 7th through June 8th, 2021, was approved to be transported to US Ecology for treatment and disposal.	Jamie Grant
11/23/2021	Offsite Soil or Groundwater Disposal Approved	55 gallons of purge water, generated between October 11th through October 13th, 2021, was approved to be transported to US Ecology for treatment and disposal.	Jamie Grant
3/22/2022	Document, Report, or Work plan Review - other	2021 Groundwater Monitoring Report submitted by Tryihdydro.	Janice Wiegers
3/22/2022	Document, Report, or Work plan Review - other	2021 Groundwater Monitoring Report submitted by Tryihdydro.	Janice Wiegers
4/18/2023	Long Term Monitoring Workplan or Report Review	Approved longterm monitoring report. Petroleum contamination including GRO, DRO, RRO, and BTEX remains in groundwater at concentrations consistent with previous sampling events. ADEC Agrees with recommendations for continued monitoring.	Michael Hooper

Action Date

Action

Description

DEC Staff

1/5/1999

Update or Other Action

Letter from Pete Hellstrom advising Department of name change from MAPCO to Williams Alaska Petroleum effetive Dec. 8, 1998

Eileen Olson

1/6/1999

Update or Other Action

More information on the historical use of this area can be found under file #2100.38.163 for Chugach Electric Association Lease.

Bill O'Connell

12/20/1999

Site Added to Database

Petroleum.

Eileen Olson

1/25/2000

Site Ranked Using the AHRM

Initial ranking.

Eileen Olson

6/26/2000

Site Ranked Using the AHRM

After discussion with DB Administrator, changed the SW Environments value from 0 to 2 and the GW Usage Value from 0.1 to 0.8. Now a High Priority site.

Eileen Olson

7/3/2000

Update or Other Action

Changed site name to "Port of Anchorage Williams Facility" from "Williams/Mapco Facility" to better identify which tank farm this is.

Eileen Olson

11/8/2000

Update or Other Action

Approval granted to backfill excavation for contaminated soils and free product on groundwater discovered at the Asphalt Pad during an October utility excavation. Work plan

Eileen Olson

11/15/2000

Update or Other Action

Asphalt Pad: Received email from Williams stating that wells in immediate area of the seep have been sampled and no free product was found, and that sampling report would be mailed.

Eileen Olson

8/29/2001

Site Characterization Workplan Approved

Work Plan approved for evaluation of product at old topping unit pad, plan dated July 23, 2001

Eileen Olson

5/15/2002

Update or Other Action

Workplan approval and notification that cleanup levels granted contingent on submittal of a risk assessment (never submitted) are rescinded.

Eileen Olson

11/22/2002

Update or Other Action

DEC letter sent approving use of approximately 1200 cubic yards of stockpiled soil as fill at Williams Terminal #1, Port of Anchorage, and reminder that Alternative Cleanup Levels conditionally granted in the Department's March 12, 1998 letter to PUG members are rescinded.

Eileen Olson

3/28/2003

Update or Other Action

Discussion with consultant regarding pre-purchase environmental audit (Frontier considering purchase of Williams terminal). Staff relayed that cleanup levels not established for soil or groundwater since risk assessment not submitted. Cleanup levels were rescinded as per May 15, 2002 letter.

Eileen Olson

1/14/2005

Update or Other Action

Well Installation and GW Assessment Report received by DEC and PM changed to Nuechterlein.

Linda Nuechterlein

1/19/2005

Update or Other Action

Above report contained results of most recent GW sampling conducted in October 2004. Water samples were collected from 25 MWs, including 5 newly installed wells, and analyzed for GRO, DRO, RRO and BTEX. Overall, samples from 12 MWs contained petroleum hydrocarbons concentrations that exceed DEC GW cleanup levels. Generally results indicate a stable or downward trend in concentrations with the exception of monitoring wells B9MW and B12MW which suggests the plume is not delineated in this area to the north. The next GW monitoring event is scheduled for May 2005.

Linda Nuechterlein

1/27/2005

Meeting or Teleconference Held

DEC meeting with John Hellen (FH) and site inspection of the Flint Hills Anchorage Terminal. Meeting topics included a review Anchorage terminal spill history, discussion of contamination issues, & results of the latest GW monitoring effort. During facility inspection, the location of monitoring wells, including 5 new MWs installed in Oct. 2004 was noted. Flint Hills will be submitting a work plan to install two additional monitoring wells in the North Tank Farm area. Tentative schedule to install these wells is in March 2005.

Linda Nuechterlein

2/18/2005

Update or Other Action

Shannon & Wilson installing two new monitoring wells at the FHR facility on Friday, Feb 18. Based on groundwater samples exceeding cleanup levels at B12MW, two wells will installed due west to reestablish a perimeter monitoring well network. Report will be submitted to DEC mid-March.

Linda Nuechterlein

8/9/2005

GIS Position Updated

Spatial data obtained by Shannon & Wilson. Township, Range and Quadrangle info from Alltopo. GPS'd gate Entrance.

S&W

4/20/2006

Site Characterization Workplan Approved

2006 work plan for GW monitoring at Flint Hills approved.

Bill O'Connell

6/27/2006

Site Characterization Report Approved

Received May 2006 Groundwater Monitoring Report. Petroleum hydrocarbons above Table C in 5 of the 8 wells sampled. Sentry wells MW-26 and B33MW show stable contaminants levels below Table C values.

Bill O'Connell

4/3/2007

Update or Other Action

Recieved October 2006 groundwater monitoring report for 1076 Ocean Dock Road. Groundwater samples were collected from 12 monitoring wells and a statistical analysis of contaminant concentrations in individual wells was conducted to evaluate trends. Statistical analysis indicates no apparent trends in the wells that were included in the analysis indicating the contaminant concentrations in these wells is stable. However, DRO and RRO exceeded Table C cleanup levels in B32MW, a sentinel well where these analytes had not exceeded Table C values in the past. Additionally, sentinel well B33MW contained detectable concentrations of DRO and RRO where none had been detected previously. Contaminant concentrations in B31MW along the south western edge of the property exceed Table C values for DRO and RRO indicating offsite migration may be occurring.

Bill O'Connell

4/6/2007

Update or Other Action

Recieved 2007 Groundwater Monitoring Work Plan for 1076 Ocean Dock Road. Monitoirng well B32MW will be added to the spring monitoring event so that all of the sentinel wells along the west side of the facility are monitored at the same time. Results of 2006 monitoring indicate increasing contaminant concentrations in these sentinel wells so additional data was requested to evaluate potential contaminant migrations. A total of 11 wells will be sampled in Spring 2007, with an additional 7 wells added for the annual monitoring event scheduled for fall 2007.

Bill O'Connell

5/10/2007

Exposure Tracking Model Ranking

Initial ranking completed

Bill O'Connell

9/5/2007

Site Characterization Report Approved

Recieved Spring 2007 monitoring report and completed QA/QC checksheet. Samples were collected from 17 of the 27 accessible monitoring wells at the site. 11 of the 17 wells sampled contained hydrocarbon concentrations above ADEC Table C cleanup levels including historically high concentrations of DRO in MW-14 at 84.7 mg/l and MW-19 at 21.9 mg/l, RRO in MW-14 at 7.70 mg/l and benzene in MW-24 at 0.123 mg/l. Hydrocarbon concentrations in sentinel wells remained relatively stable since 2006.

Bill O'Connell

9/12/2007

Meeting or Teleconference Held

Meeting today with Chevron, Flint Hills, ARRC, EPA, ADEC, consultants, and attorneys to discuss risk assessment at Flint Hills and Chevron Port of Anchorage Facilities. Risk assessment is being conducted to fulfill ARRC's obligations to EPA under the AOC. Flint Hills and Chevron will be contacting ADEC in the near future to discuss scoping of risk assessment.

Bill O'Connell

11/29/2007

Site Characterization Workplan Approved

Surface soil sampling work plan approved for Flint Hills Port of Anchorage. Approximately 23 soil samples will be collected and analyzed for DRO, GRO, RRO, EDB, VOCs, PAHs, and lead. Data will be used to characterize surface soil for risk assessment.

Bill O'Connell

2/29/2008

Update or Other Action

Received Fall 2007 groundwater monitoring report for FHR, 1076 Ocean Dock Road, QA/QC conducted. Groundwater samples were collected from 20 monitoring wells, including each of the sentinel wells along the western edge of the property. Hydrocarbon concentrations above Tabel C cleanup levels were recorded in 10 of the wells sampled including an exceedance of RRO in one of the sentinel wells. Overall, contaminant concentrations are consistent with previous monitoring events. Statistical analyses conducted on several of the wells with 8 or more positive sampling results did not indicate clear trends.

Bill O'Connell

7/1/2008

Update or Other Action

Final Risk Assessment Work Plan recevied by ADEC.

Bill O'Connell

9/17/2008

Site Characterization Report Approved

Received Spring 2008 Groundwater Monitoring Report. Groundwater samples were collected from 9 of the 27 accessible wells during the spring event.Hydrocarbon concentrations above Table cleanup levels were detected in 5 of the 9 wells sampled and the results are generally consistent with previous results with DRO detectred up to 10.8 mg/l in MW-14, GRO up to 3.96 in MW-2 and benzene up to 0.122 mg/l in MW-19. Sentinel wells B27MW and B33MW did contain detectable concentrations of hydrocarbon contaminants

Bill O'Connell

9/19/2008

Site Characterization Workplan Approved

Reviewed workplan for installation of sentry wells along west side of facility. Three wells will be installed and sampled and the data will be included in the Fall 2008 monitoring report.

Bill O'Connell

1/9/2009

Document, Report, or Work plan Review - other

Received draft Risk Assessment Report for Flint Hills Bulk Fuel Terminal at the Port of Anchorage. The results of the RA do not indicate carcinogenic or non-carcinogenic risk to any receptors above benchmark values. ADEC provided comments to the draft RA which are anticipated to be resolved in the Final Report. In addition to the RA, a groundwater use determination under 18 AAC 75.350 was requested. A decision on the groundwater use determination will be made in conjunction with review of the final RA Report

Bill O'Connell

2/24/2009

Document, Report, or Work plan Review - other

Received Fall 2008 Sentry Well Installation and Groundwater Monitoring Report. Three new monitoring wells were installed along the western edge of the property to monitor plume migration towards Cook Inlet.Groundwater samples were collected at these and 22 existing wells in October 2008. Contaminants were not detected in soil or groundwater at the new sentry wells. In the other 22 wells sampled, GRO was detected up to 7.08 mg/l in MW5, DRO was detected up to 6.73 mg/l in MW14, RRO was detected up to 3.60 mg/l in MW4 and benzene was detected up to 0.625 mg/l in MW5. A statistical analysis of individual wells with 8 or more data points indicates the plume is generally stable,however DRO and RRO were detected above the cleanup level for the first time in B30MW along the southern boundary of the property

Bill O'Connell

4/21/2009

Site Characterization Workplan Approved

Reviewed 2009 Groundwater Monitoring Work Plan for 1076 Ocean Dock Road. Two groundwater monitoring events will be conducted in 2009. Twelve wells will be sampled in the spring and fall, with an additional thirteen wells sampled only during the fall event.

Bill O'Connell

7/30/2009

Risk Assessment Report Approved

Final RA Report Approved, approval of 350 goundwater use determination is pending.

Bill O'Connell

8/15/2009

Update or Other Action

Final RA approved

Bill O'Connell

9/15/2009

Document, Report, or Work plan Review - other

Reviewed May 2009 Groundwater Monitoring Report. Samples were collected from 12 MWs, B33MW could not be located. Analytical results were generally consistent with historical results. DRO was detected up to 6.88 mg/l in MW14, GRO was detected up to 4.61 mg/l in MW2, and benzene was detected up to 0.06 mg/l in MW19. Contaminant concentrations in some wells appear directly related to groundwater elevation.

Bill O'Connell

10/30/2009

Document, Report, or Work plan Review - other

Draft Feasibility Study reviewed. The FS was conducted as a focused FS with limited alternatives considered based on current and anticipated future land use. The selected alternative is Institutional Controls, however implementation of the selected remedy will be done in conjunction with EPA and ARRC, as this lease property is subject to the EPA AOC in place with ARRC.

Bill O'Connell

2/2/2010

350 Determination

Groundwater use determination under 18 AAC 75.350 granted for the Flint Hills Port of Anchorage Terminal. Under this determination, the water in the shallow aquifer has been demonstrated to be non-potable and is therefore not considered a current or future use of drinking water.

Bill O'Connell

4/26/2010

Document, Report, or Work plan Review - other

Reviewed Revised Draft Feasibility Study for Flint Hills Resources. The primary revision is the addition of Groundwater Monitoring to Alternative #2, Institutional Controls, making the selected alternative Institutional Controls with Groundwater Monitoring. The selected alternative would provide for a deed notice, covenant, or restriction on the property so that groundwater may not be accessed as a drinking water source and include annual groundwater monitoring of a selected number of wells to monitor contaminant trends.

Bill O'Connell

5/13/2010

Long Term Monitoring Established

Per the Selected Alternative from the Feasibility Study, monitoring wells MW1, MW4, MW5, MW9, B31MW, B34MW, B35MW, and B36MW will be monitored on an annual basis for DRO, GRO, RRO, and BTEX. A five year review will be conducted in 2015 to determine if the monitoring schedule is appropriate.

Bill O'Connell

8/3/2010

Document, Report, or Work plan Review - other

Work plan approved for deommissioning of monitoring wells not needed for annual monitoring.

Bill O'Connell

11/12/2010

Document, Report, or Work plan Review - other

Reviewed Well Decommissioning work plan addendum. Because some of the monitoring wells are within the lined, secondary containment area, they will be decommissioned by filling the entire casing with grout so as not to necessitate repairing the liner after removal.

Bill O'Connell

5/18/2011

Document, Report, or Work plan Review - other

Reviewed 2010 Monitoring Well Decommissioning and Groundwater Sampling Report. 22 monitoring wells not needed for long term monitoring were decommissioned. Monitoring wells that were within the lined areas were only filled with grout and the casings were left in place because qualified personnel were not available to repair the liner. Groundwater samples were collected from monitoring wells MW1, MW4, MW5, MW9, B31MW, B35MW, and B36MW; well B34MW was submerged and not sampled. DRO was detected up to 11.3 mg/l at MW4, GRO was detected up to 7.79 mg/l at MW5, and benzene was detected up to 1.14 mg/l, also at MW4. Data was generally consistent with previous results, however some wells showed historic high concentrations of DRO.

Bill O'Connell

3/21/2012

Document, Report, or Work plan Review - other

Reviewed July 2011 Groundwater monitoring Report for Flint Hills Port of Anchorage bulk fuel facility. Samples were collected from 8 monitoring wells and analyzed for DRO, GRO, RRO, and VOCs. Contaminants were detected above Table C cleanup levels in 3 of the 8 wells sampled, with DRO detected up to 10.7 mg/l, GRO up to 5.26 mg/l, and benzene up to 0.311 mg/l, all in the sample from well MW5. The sentinel wells B34MW, B35MW, and B36MW did not contain detectable concentrations of contaminants, except xylenes, which were detected in B35MW at 0.0007 mg/l, below the Table C cleanup level of 10 mg/l. The data is consistent with historical results, the next monitoring event is scheduled for July 2012.

Bill O'Connell

11/28/2012

Document, Report, or Work plan Review - other

Reviewed July 2012 groundwater monitoring report for Flint Hills Anchorage Terminal. Seven of the eight monitoring wells designated for long term monitoring were sampled; well B31MW was observed to be full of soil and was not sampled. GRO was detected up to 4.37 mg/l in MW5, RRO up to 1.67 mg/l in MW4, DRO up to 6.36 mg/l in MW5 and benzene up to 0.562 mg/k in the same well. Only wells MW4 and MW5 located near Ocean Dock road contained contaminants above cleanup levels. Sentinel wells B34MW and B36MW contained detectable concentrations of DRO and RRO, but the analytical results are estimates and are both below the cleanup level. Sentinel well B35 MW did not contain detectable concentrations of contaminants. The report recommends B31MW be decommissioned. It is anticipated that this well will be reinstalled in 2013. The 2012 sampling results are consistent with previous results

Bill O'Connell

8/8/2013

Update or Other Action

On this date, ADEC received the “WORK PLAN FOR MONITORING WELL INSTALLATION AND DECOMMISSIONING, FLINT HILLS RESOURCES ALASKA ANCHORAGE TERMINAL, ANCHORAGE, ALASKA” submitted by S&W dated July 16, 2013. The objectives of this project are to decommission Well B31MW and install replacement Well B31MW-R. The work will occur during the annual groundwater monitoring and well survey activities to occur during the summer 2013.

Grant Lidren

4/21/2014

Potentially Responsible Party/State Interest Letter

Potentially Responsible Party / State Interest Letter sent by PERP staff John Brown to Flint Hills Resources Alaska, LLC for spill no. 14239910901.

Mitzi Read

4/25/2014

Site Visit

On this date, ADEC met with Flint Hills and Shannon and Wilson at the "FHRA Fuel Rack Gas Spill". Approximately 4,273 gallons of gasoline spilled onto approximately 5,500 square feet of soil on April 19th 2014. PERP is currently working with Flint hills to cleanup contaminated soil and groundwater. Groundwater is 2 feet bgs and contains free product.

Grant Lidren

7/23/2014

Site Visit

The CSP and PERP met with Flint Hills and visited and took pictures of the site on this date. The tank farm contained black petroleum odor product on the surface water. Emerald was on the scene sucking up the oily water with a vacuum truck. Source area of the contamination is unknown. This tank farm was built in the 1960s and does not contain a liner.

Grant Lidren

7/24/2014

Site Visit

The CSP and PERP met with Flint Hills and visited and took pictures of the site on this date. The source area is suspected to be an underground pipeline leaking Jet-A fuel. The pipelines supplying Jet-A have been shut. The vacuum truck is still recovering free product and test pitting to the shallow groundwater at 2 to 4 ft. bgs has begun to determine the source area and the extent of contamination. Test pits down gradient of the tank farm contain black colored free product. It is suspected that the black colored free product is from asphalt in the ground leaching off from the Jet-A acting as a solvent. One of the test pits did contain clear Jet-A product. This test pit is the suspected area of the pipe leakage which will be further investigated.

Grant Lidren

7/30/2014

Site Visit

CSP, PERP, and IPP met with Flints Hills and Shannon and Wilson at the site on this date. During the site visit, contaminated soil was being excavated around a pipe suspected of the Jet-A-release. However testing of the pipe has been inconclusive thus far; source area is still unknown. Contaminated soil is still being excavated to the best extent practical. The full extent of contamination is unknown, particularly towards the tank farm to the south.

Grant Lidren

8/11/2014

Site Visit

Site visit on this date. Source area was traced to a leak in a jet fuel pipeline at the "Candy Cane" low-point drains that are located between the Tri-Palace and West Pump skid north of the West Tank Farm SCA.

Grant Lidren

8/14/2014

Meeting or Teleconference Held

CSP, IPP, and PERP attended a meeting at Flint Hills on this date. Flint Hills plans to fill the pipelines where the spill occurred with concrete and abandoned in place. New above ground pipelines will be completed by the end of 2014. Continued cleanup actions and characterization was also discussed. Free product was noted in the pipeline excavation and fire shed testpit during the visit. Additionally, it appeared a slight sheen was present in testpit 9C located downgradient of the pipeline excavation. However, it was not determined if this sheen was associated with the Jet-A spill event or was from historic contamination.

Grant Lidren

10/22/2014

Site Visit

On this date, CS, PERP and IPP met S&W and FHR onsite. Approximately 6,000 gallons of free product has been recovered. Excavations had been filled in and recovery sumps and observation wells were installed. The furthest west recovery sump and observation well located adjacent to the West Pump Skid contained the most significant free product. Emerald is removing product twice a day. S&W collected soil samples at the smear zone where possible prior to filling in of the trenches. Significant free product was still "weeping" into the excavation during backfilling.

Grant Lidren

1/15/2015

Site Characterization Report Approved

On this date, ADEC received the East Tank Farm Gasoline Spill Response Flint Hills Resources Alaska Anchorage Terminal submitted by Shannon & Wilson dated January 2015. Soil and free product removal was conducted April 20th to May 2nd 2014. Groundwater was encountered where excavations were advanced lower than 2 feet bgs. A Total of 505 drums, 1,300 gallons of free product, and 587 gallons of contaminated groundwater were transported offsite for treatment. Soil and groundwater characterization samples were conducted by S&W in April and May 2014. Groundwater samples collected from historic monitoring wells MW1, MW4, MW5, and MW9 were all below table C groundwater cleanup levels except MW5 which contained GRO at 2.49 mg/L and benzene at 0.178 mg/L. Groundwater flow was generally west. Contaminated soil was excavated 3 to 6 inches in most areas around the pump skid, but was excavated up to 3 feet bgs along the north and west containment wall. Confirmation soil samples and water samples from test holes contained significant contamination based off the presence of free product in some areas and analytical soil sample results. Thirty-four confirmation soil samples collected from the five excavations contained GRO up to 1,870 mg/kg, DRO up to 7,390 mg/kg. RRO up to 1,850 mg/kg, benzene up to 14.2 mg/kg, toluene up to 764 mg/kg, ethylbenzene up to 984 mg/kg, and xylenes up to 1,269 mg/kg. Contamination is located to the east, north, west and southwest of the pump skid. The excavation and test holes were brought back to grade with clean fill during Fall 2014.

Grant Lidren

1/20/2015

Site Characterization Report Approved

On this date, ADEC received the 2013 Well Decommissioning, Installation, and Monitoring 1076 Ocean Dock Road Report submitted by S&W dated January 2015 (note: this work was completed in 2013). The field activities consisted of decommissioning monitoring well B31MW, installing and developing replacement well B31MW-R, converting wells B35MW and B36MW from flush-mount to stick up monuments, and sampling seven of the eight groundwater monitoring wells designated for long term monitoring. The wells in the monitoring program include Wells MW1, MW4, MW5, MW9, B31MW-R, B34MW, B35MW, and B36MW. Well B34MW was not sampled because it was under surface water. Six of the eight monitoring wells contained detectable concentrations of petroleum constituents. MW5, the most contaminated of these six MWs, contained GRO at 7.79 mg/L, DRO at 5.76 mg/L, RRO at 2.74 mg/L, and benzene at 0.586 mg/L. A hydrocarbon odor was noted in MW-5 and B31MW-R. A soil sample collected 1 foot above the groundwater interface at 1.5 feet bgs during the advancement of replacement well B31MW-R contained detectable RRO but below cleanup levels (Note: this soil sample is considered bias low because it was collected with a vac truck).

Grant Lidren

1/26/2015

Spill Transferred from Prevention Preparedness and Response Program

Spill transferred by PERP staff John Brown. Spill no. 14239910901; spill date = 4/19/14; substance = gasoline; quantity = 4,273 gallons; source = fuel filter vessel, East Tank Farm; spill ledger code = 14347060.

Mitzi Read

2/12/2015

Offsite Soil or Groundwater Disposal Approved

As of this date, contamination generated during cleanup activities at the 4/21/14 Gas rack spill was transported to the appropriate facilities. ASR accepted 363 drums (102.62 tons) of non-hazardous contaminated soil for thermal remediation. Ross Incineration (licensed TSD Facility) accepted a total of 142 drums of hazardous soils for incineration. Emerald recovered an estimated 1,300 gallons of free product and 587 gallons of contaminated groundwater for treatment.

Grant Lidren

4/23/2015

Update or Other Action

On this date, ADEC received the Jet Fuel Spill Response, Flint Hills Resources Alaska, Anchorage Terminal submitted by Shannon & Wilson dated April 2, 2015. The Report pertains to confirmation soil sampling from the Asphalt Tank Farm Secondary Containment Area after initial response activities excavated an area of 1,800 square feet. Confirmation soil sampling was limited by: a concrete pad and a berm containing water, stairs, piping, asphalt, puddled storm water with sheen, a ponded area with absorbent boom, and active petroleum seepage and recovery efforts. Eleven soil samples collected contained DRO up to 15,300 mg/kg. All other detectable concentrations of petroleum constituents were below method two soil cleanup levels.

Grant Lidren

7/27/2015

Site Characterization Report Approved

On this date, ADEC received the 2014 Groundwater Monitoring 1076 Ocean Dock Road Report submitted by S&W dated July 2015 (note: this work was completed in 2014 ). The field activities included long term sampling of monitoring wells MW1, MW4, MW5, MW9, B31MW-R, B34MW, B35MW, and B36MW. Monitoring wells MW1, MW4, MW5, and MW9, were sampled again in 2014 to monitor the impacts to groundwater from the April FHRA Fuel Rack Gas Spill. All of the monitoring wells contained detectable concentrations of petroleum constituents. MW5, the most contaminated of these MWs, contained GRO at 5.38 mg/L, DRO at 6.03 mg/L, and benzene at 0.415 mg/L. A hydrocarbon sheen and odor were noted in MW-5 and B31MW-R respectively. Sentinel monitoring wells B34MW, B35MW, and B36MW adjacent to Knik Arm contained detectable levels of BTEX. These monitoring wells have historically been non-detect. Groundwater flow was generally to the west-southwest.

Grant Lidren

8/31/2015

Document, Report, or Work plan Review - other

On this date, ADEC received the FHR Release Investigation (RI) Report Anchorage Terminal dated August 28, 2015 submitted by Arcadis. This RI was conducted to characterize two 2014 spill events: the April east tank farm gas rack spill and the July Jet-A pipeline spill. The amount of Jet Fuel released is unknown, but at least 8,835 gallons have been recovered. The amount of gas released at the ETF gas rack spill was approximately 4,273 gallons. A total of 35 soil borings were advanced with eight completed as temporary monitoring wells to determine locations of permanent monitoring wells. Four soil borings adjacent to the east tank farm were not completed due to proximity to railroad tracks. Soil samples were collected from borings based off laser induced fluorescence screening results. At the WTF, SB-123 adjacent to 2014 excavation area contained the highest concentrations of contaminants with DRO above ingestion/inhalation. At the ETF, boring SB-132 down gradient of the 2014 excavation area contained the highest concentration of contaminants with toluene, xylenes, and GRO above ingestion/inhalation. Thirteen groundwater samples were collected from the eight temporary MWs. All of the temporary monitoring wells contained contaminant concentrations above Table C groundwater cleanup levels except SB-111 located west of the WTF middle. The other seven temporary MWs contained GRO up to 4.29 mg/L, DRO up to 163 mg/L, and benzene up to 0.129 mg/L. Based off this data, six permanent monitoring wells were installed: MW-201 to MW-207. These new monitoring wells and the historic monitoring wells MW1, MW4, MW5, MW9, B31MW-R, B34MW, B35MW, and B36MW were sampled February 2015. Only upgradient MW-1 and the downgradient sentinel wells B34MW, B35MW, and B36MW contained contaminant concentrations below Table C groundwater cleanup levels. Twelve groundwater samples collected from the 10 contaminated monitoring wells contained GRO up to 47 mg/L, DRO up to 4.59 mg/L, RRO up to 1.15 mg/L and benzene up to 0.968 mg/L. (Note: this groundwater sampling event is for the first quarter of 2015.)

Grant Lidren

8/31/2015

Site Characterization Report Approved

On this date, ADEC received the West Tank Farm Jet Fuel Spill Response FHR Anchorage Terminal dated July 2015 submitted by Shannon & Wilson. This Report discusses field activities conducted between July 22, 2014 and May 26, 2015 including: installation of a NAPL recovery system, free product recovery and groundwater potentiometric surface evaluation sections. The NAPL recovery system was installed within two trenches that were excavated as part of the initial response. The trenches were converted to collection trenches with two sumps for collection and removal of free product. FHRA reported 8,835 gallons of product had been recovered via vacuum truck as on April 7, 2015 and over 147 cubic yards of contaminated soil was removed from the two trenches. Continued product recovery into 2015 has stabilized to 1/8 inch or less. Seven observation wells were installed within and around the recovery trenches. Contaminated soil was removed to a depth of 8 feet bgs during install. Measurable NAPL was observed in observation well: OW1, OW2t, OW3, and OW5t and a sheen was present in OW6 and OW7. The most significant product was measured in OW3, located north of recovery sump RS2, up to 0.65 foot on January 2, 2015 and decreased to a sheen by April 13, 2015 with rising GW levels. Eight soil samples were collected as part of the NAPL recovery trench installation. Two soil samples collected 6 to 7 feet bgs at test hole OW4 for lateral delineation adjacent to the West Tank farm did not contain contaminant concentrations above cleanup levels. Six soil samples collected 3 to 6.3 feet bgs during the collection trench and observation holes installations contained GRO up to 1,280 mg.kg, DRO up to 13,500 mg/kg, and benzene up to 0.608 mg/kg.

Grant Lidren

1/6/2016

Site Characterization Report Approved

On this date, ADEC received the 2015 Annual Groundwater Monitoring Summary Report Port of Anchorage Terminal submitted by Arcadis dated January 5, 2016. The report discusses: LNAPL recovery; LNAPL measurements from observation wells; and second, third, and fourth quarterly groundwater monitoring from onsite monitoring wells in 2015. LNAPL was recovered via the two recovery sumps five days a week from 1/15 to 6/15 then twice a week from 6/15 to 10/15 then passive sorbents to present date. From 7/10/15 to 12/4/15, measurable LNAPL was observed in observation well: OW2t and OW5t and a sheen was present in OW1. During the second quarter on 5/26/15, nine of the 17 MWs sampled contained contaminant concentrations above Table C cleanup levels with GRO up to 7.56 mg/L (MW-206), DRO up to 7.55 mg/L (B31MW-R), and benzene up to 0.482 mg/L (MW-206). During the third quarter on 8/11/15, 11 of the 19 MWs sampled contained contaminant concentrations above Table C cleanup levels. MW-206, located adjacent to the fueling rack contained the most significant concentrations with GRO at 37.5 mg/L, DRO at 11.5 mg/L, and benzene at 1.18 mg/L (note: sentinel monitoring well B36MW contained DRO at 3.29 mg/L, which is the first time one of the three sentinel MWs have contained contaminant concentrations above table C cleanup levels). During the fourth quarter on 11/11/15, eight of the 18 MWs sampled contained contaminant concentrations above Table C cleanup levels with GRO up to 20.2 mg/L (MW-206), DRO up to 3.85 mg/L (B31MW-R), and benzene up to 0.308 mg/L (MW-5). (note: sentinel monitoring well B36MW contained DRO at 0.200 mg/L, which is below table C cleanup levels).

Grant Lidren

6/16/2016

Site Characterization Report Approved

On this date, ADEC received the First Semiannual 2016 Groundwater Monitoring Flint Hills Resources AK, LLC Report submitted by Arcadis dated June 2016. The field activities included long term sampling of monitoring wells MW-201 to MW-207, MW1, MW4, MW5, MW9, B31MW-R, B34MW, B35MW, B36MW, OW-4, OW-6, and OW-7. Sheen was noted in observation wells OW-1, OW-2t, OW-3, and OW-5t and were therefore not sampled. Groundwater flow was generally to the west-southwest near the east tank farm and west tank farm and to the northwest near the north tank farm. Seven of the MWs contained contaminant concentrations above cleanup levels. MW-206 located at the east tank farm, the most contaminated MW, contained GRO at 85.3 mg/L, DRO at 8.13 mg/L, benzene at 4.08 mg/L and toluene at 31.9 mg/L. Sentry wells B34MW, B35MW, and B36MW adjacent to Knik Arm were sampled within one hour of high tide. B34MW and B35MW contained detectable levels of GRO, toluene, and xylenes.

Grant Lidren

10/17/2016

Site Characterization Workplan Approved

On this date, ADEC received and approved the groundwater monitoring work plan submitted by Trihydro and dated October 17, 2016. The onsite monitoring wells will be sampled the week of October 24, 2016.

Grant Lidren

10/17/2016

Update or Other Action

The Flint Hills Resources Alaska (FHRA) Anchorage Terminal has changed ownership. Tesoro Alaska Company is the new owner and the facility is now named the Tesoro Ocean Dock Terminal - Port of Anchorage (POA). The file remains 2100.38.310.

Darren Mulkey

1/24/2017

Document, Report, or Work plan Review - other

Review of the Tesoro Ocean Dock Terminal - Port of Anchorage, 2016 Fall Groundwater Monitoring Report, submitted by Trihydro, dated January 18, 2017. Gauging data indicates groundwater levels decreased on average by 0.17 feet between spring and fall sampling events, similar to yearly fluctuations in the area. Groundwater flow patterns remain consistent with past quarters, suggesting west-southwest trend near the East Tank Farm and West Tank Farm and northwest trend near the North Tank Farm. LNAPL was detected in OW-1, OW-2t, OW-5t, OW-6, and OW-7 during the October 2016 monitoring event. The measurements are consistent with historical records and are associated with 2014 West Tank Farm Jet A fuel release. Eight onsite monitoring wells exceed the ADEC groundwater cleanup levels for a combination of BTEX, GRO, DRO, and RRO. BTEX and GRO appear to be primarily associated with the East Tank Farm pump release as well as with historical releases near the railcar loading rack and the warehouse. RRO and DRO appear to be associated with the West Tank Farm Jet A fuel release and historical releases near the railcar loading rack. Overall, analytical results in October 2016 are consistent with historical sampling results. The lateral extent of benzene above the groundwater cleanup level is also consistent with historical sampling results. The decrease in the ADEC cleanup level for benzene from 5 to 4.6 µg/L did not have a noticeable effect on the lateral extent of benzene above the cleanup level. Additionally, benzene remains the primary BTEX compound above the ADEC cleanup level.

Darren Mulkey

5/1/2017

Document, Report, or Work plan Review - other

Reviewed Work Plan for 2017 Field activities at Tesoro Ocean Dock Terminal. 15 groundwater monitoring wells will be sampled in spring and fall 2017 for DRO/RRO/GRO/BTEX and the free product recovery wells associated with the 2014 pipeline release will be evaluated for decommissioning.

Bill O'Connell

7/27/2017

Document, Report, or Work plan Review - other

Reviewed 2017 Well Removal and Decommissioning Work Plan for Tesoro Ocean Dock Terminal. Recovery and observation wells associated with a 2014 pipeline release will be removed because recoverable product is no longer present in the wells. Wells to be removed include RS1, RS2, RS3, RS4, OW-1, OW-2t, OW-3, OW-5t. Observation wells OW-4, OW-6, and OW-7 will be retained for future groundwater monitoring efforts.

Bill O'Connell

8/25/2017

Document, Report, or Work plan Review - other

Reviewed soil management plan for Tesoro Ocean Dock Rd terminal. Tanks T-4219, T-4218, T-4220 and T-3108 will be demolished and up to 793 cy of petroleum contaminated soil will be segregated and stockpiled. Contaminated soil will be treated at ASR, soil with a PID reading of less than 10 ppmv will be reused as backfill.

Bill O'Connell

10/17/2017

Document, Report, or Work plan Review - other

Reviewed Work Plan for Potential Contaminated Soil and Groundwater Management at Tesoro Ocean Dock Terminal Wastewater System Project. The project consists of the construction of a 150 linear foot sanitary sewer line that collects wastewater from the Truck Loading and Rail Car Loading rack containment areas. Field screening will be conducted every 25 feet at a minimum at depths ranging from 1 to 7.5 feet bgs and segregated in the field into two lined and covered stockpiles based on suspected degree of contamination. Soil that is suitable for use as backfill will be placed back into the excavation, with the top two feet of material being clean, uncontaminated fill. Excess soil or soil not suitable for reuse will be stockpiled and sampled to determine disposal options. If excavation dewatering is required, Tesoro will either discharge the water to the sanitary sewer system under a permit from AWWU or containerize and transport the water to an approved treatment facility.

Bill O'Connell

2/14/2019

Site Characterization Workplan Approved

The Alaska Department of Environmental Conservation (ADEC) has completed its review of the 2019 groundwater monitoring workplan included with the 2018 Annual Report (Appendix E) and has no objections to the workplan.

Chelsy Passmore

2/14/2019

Site Characterization Workplan Approved

Chelsy Passmore

2/6/2020

Document, Report, or Work plan Review - other

2019 groundwater monitoring report was submitted with this date. BTEX, GRO, DRO, and RRO exceeded cleanup levels in 8 onsite monitoring wells. No product was observed in the monitoring wells. Three new wells were installed as part of the Spill Prevention, Control, and Countermeasure Program. These wells included MW-208, MW-209, and MW-210.

Janice Wiegers

3/25/2020

Document, Report, or Work plan Review - other

Soil was excavated as part of a sewer line and rail pan repair project. Trihydro submitted a report detailing this work dated 3/6/2019. Soil was put into three stockpiles based on field screening results. Upon completion of the work stockpiled soil was sampled per ADEC Field Sampling Guidance. Stockpiles consisted of one approximately 600 cubic yard impacted pile, and two piles of non-impacted soil with a total of 200 cubic yards of soil. The soil in the impacted pile was then taken to Alaska Soil Recycling for remediation and soil from the non-impacted piles was used in a beneficial reuse on site. Groundwater dewatering also occurred during the repair project. Groundwater recharge was slow and less than 18,000 gallons of water was dewatered from the excavation. Water was sampled and then discharged to the AWWU sanitary sewer per the permit.

Chelsy Passmore

7/30/2020

Offsite Soil or Groundwater Disposal Approved

Approved transport of 40 gallons of purge water to US Ecology, Viking Facility for solidification and disposal in Idaho.

Janice Wiegers

11/6/2020

Offsite Soil or Groundwater Disposal Approved

DEC approved transport of 40 gallons of purge water to U.S. Ecology for solidification and disposal at their facility in Idaho.

Janice Wiegers

11/25/2020

Update or Other Action

Notified by the Municipality of Anchorage in a letter dated 11/19/2020 that contaminated groundwater associated with this site and the site Crowley Facility Port of Anchorage (Haz ID 605) appears to be getting into the stormwater system. The MOA is working with these parties to repair the drains.

Janice Wiegers

2/22/2021

Workplan Requested

ADEC Requested a work plan by March 22, 2021 in coordination with the MOA to remediate the continued release of contaminated groundwater to MOA's storm drain system and prevent migration to surface water. Request was concurrently sent to Crowley Facility Port of Anchorage site (Hazard ID: 605).

Jamie Grant

4/14/2021

Meeting or Teleconference Held

Annual meeting with Marathon/Tesoro, Trihydro, and DEC Project Managers to review monitoring results and activities reported in 2020 and discuss plans moving forward for 2021.

Jamie Grant

5/5/2021

Document, Report, or Work plan Review - other

Reviewed a 2020 Annual Groundwater Monitoring Report for Tesoro Ocean Dock Terminal. Groundwater levels were measured during sampling events which indicate seasonal variations in groundwater elevations indicate that groundwater elevations. Typically elevations are lower in the winter and rise during spring into late summer. In the spring, groundwater flows northwest near the East and North Tank Farms and flows southwest near the West Tank Farm. In the fall, groundwater flows southwest near the East and West Tank Farms and flows north-northwest near the North Tank Farm. These flow directions are generally consistent with historical data. Measurable thicknesses of Light non-aqueous phase liquid (LNAPL) were not observed in monitoring wells in 2020. One or more of the following analytes were detected in groundwater samples collected from 9 of the 15 onsite monitoring wells and from 1 of the 3 SPCC wells. at concentrations exceeding cleanup levels: benzene, toluene, ethylbenzene, and xylenes (BTEX) gasoline range organics (GRO), diesel range organics (DRO), and residual range organics (RRO). Samples from downgradient boundary wells B34MW, B35MMW, and B36MW were collected within one hour of low tide and there were no detections above cleanup levels. Benzene concentrations in well MW-5 continue to remain below 1,000 µg/L since fall of 2018, Well MW-4 located on the northwest corner of the warehouse building continued to fluctuate in 2020 with spring and fall concentrations of ND and 51 µg/L, MW-207 concentrations have remained below initial values of around 40 µg/L with spring and fall results of 13.8 and 6.76 µg/L. In wells MW-205 and MW-206 near the East Tank Farm, benzene has been detected since 2015 when the wells were installed following the fuel headers release. Well MW-205 benzene concentrations continued to fluctuate, but are below 150 µg/L. Well MW-206 has had a benzene concentration spike as high as 4,080 µg/L (2016), 2020 results were below 70 µg/L. DRO has historically been detected at well B31MW and replacement well B31MW-R. After a spike of 8.52 mg/L in 2015, concentrations between 2016 and 2020 average ~3 mg/L. RRO in well B31MW and B31MW-R has fluctuated between ND to just above ADEC Cleanup Level, with results of 1.18 mg/L and 1.45 mg/L in the 2020 spring and fall events. The three SPCC wells installed in 2019, MW-208, MW-209, and MW-210, were analyzed in both 2020 sampling events for BTEX, GRO, DRO, and RRO. All results were ND or below ADEC Cleanup Level except RRO in MW-210 in the fall 2020 sampling event which was above the cleanup level (1.1 mg/L) at 1.12 mg/L. Groundwater results from 2020 are generally consistent with historical sampling results with concentrations fluctuating between spring and fall events

Jamie Grant

5/6/2021

Document, Report, or Work plan Review - other

Reviewed the Sampling and Analysis Plan for annual (2021) groundwater monitoring activities. The SAP was approved with the following condition: RP to modify sample collection method from bailer to one approved in the Field Sampling Guidance (ADEC, 2019) to prevent loss of volatiles.

Jamie Grant

6/10/2021

Update or Other Action

MOA Submitted additional sampling data to better understand storm drain infiltration. Analytical data indicates that COCs detected at MH-74 along Ocean Dock Road and (upstream of original contamination discovered at MH-26), were all below action levels. Where storm drains along West Bluff Drive and Ocean Dock Road intersect, MH-26 was sampled and the benzene concentration was 29.2 ug/L. Continuing downgradient along Ocean Dock Road, MH-28 was sampled and the benzene concentration was 109 ug/L (previous results were 120 ug/L). The section of the storm drain that originates from Government Hill and runs along West Bluff Drive was also evaluated at MH-32 and MH-197 where benzene concentrations were 6.67 ug/L and 5.07 ug/L.

Jamie Grant

6/30/2021

Meeting or Teleconference Held

On this day DEC and Tesoro met to discuss storm drain infiltration, analytical data, and a plan to move toward a solution.

Jamie Grant

11/23/2021

Offsite Soil or Groundwater Disposal Approved

40 gallons of purge water, generated between June 7th through June 8th, 2021, was approved to be transported to US Ecology for treatment and disposal.

Jamie Grant

11/23/2021

Offsite Soil or Groundwater Disposal Approved

55 gallons of purge water, generated between October 11th through October 13th, 2021, was approved to be transported to US Ecology for treatment and disposal.

Jamie Grant

3/22/2022

Document, Report, or Work plan Review - other

2021 Groundwater Monitoring Report submitted by Tryihdydro.

Janice Wiegers

3/22/2022

Document, Report, or Work plan Review - other

2021 Groundwater Monitoring Report submitted by Tryihdydro.

Janice Wiegers

4/18/2023

Long Term Monitoring Workplan or Report Review

Approved longterm monitoring report. Petroleum contamination including GRO, DRO, RRO, and BTEX remains in groundwater at concentrations consistent with previous sampling events. ADEC Agrees with recommendations for continued monitoring.

Michael Hooper

Contaminant Information

Name

Level Description

Media

Comments

Control Type

Type

Details

Requirements

Description

Details

2015 Annual Groundwater Monitoring Report (1/5/2016)

2016 Annual Groundwater Monitoring Report (1/18/2017)

2017 Annual Groundwater Monitoring Report (12/19/2017)

2018 Annual Groundwater Monitoring Report (1/15/2019)

2020 Annual Groundwater Monitoring Report (2/17/2021)

2019 Annual Groundwater Monitoring Report (2/6/2020)

2019 Soil and Groundwater Management Report for Sewer Line (3/19/2020)

2015 Decision Document: 350 Determination Letter

No associated sites were found.

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Site Report: Tesoro Ocean Dock Terminal - Port of Anchorage

Site Chronology

IC / Closure Details

Documents

Associated Sites

Problems/Comments

Action Information

Contaminant Information

Control Type

Requirements

2015 Annual Groundwater Monitoring Report (1/5/2016)

2016 Annual Groundwater Monitoring Report (1/18/2017)

2017 Annual Groundwater Monitoring Report (12/19/2017)

2018 Annual Groundwater Monitoring Report (1/15/2019)

2020 Annual Groundwater Monitoring Report (2/17/2021)

2019 Annual Groundwater Monitoring Report (2/6/2020)

2019 Soil and Groundwater Management Report for Sewer Line (3/19/2020)

2015 Decision Document: 350 Determination Letter

Missing Location Data

State of Alaska Department of Environmental Conservation