| Action Date |
Action |
Description |
DEC Staff |
| 10/15/1992 |
Update or Other Action |
Bioventing Remediation Investigation Prudhoe Bay, Alaska submitted by CH2MHILL |
Grant Lidren |
| 8/11/1994 |
Site Characterization Report Approved |
Received MCC Old Fuel Dock Remedial Investigation Plan, ARCO Alaska, July 1994. Report indicates elevated TPH concentrations in surface and subsurface soil at the former fueling area. |
Bill O'Connell |
| 11/15/2006 |
Site Added to Database |
Site added to the database. |
Mitzi Read |
| 3/21/2007 |
Exposure Tracking Model Ranking |
|
Bill O'Connell |
| 1/15/2008 |
GIS Position Updated |
Updated with Topozone |
Grant Lidren |
| 5/22/2012 |
Document, Report, or Work plan Review - other |
Reviewed MCC Old Fuel Dock 2012 Site Assessment Work Plan. Twelve boreholes will be advanced and soil samples will be collected. The boreholes will be completed as monitoring wells and porewater samples will be collected. Monitoring wells previously installed at the property will be inspected and sampled if in useable condition. Nearby impounded surface water will be inspected for sheen. Soil samples will be analyzed for DRO, RRO, GRO, BTEX, and PAHs; water samples will be analyzed for DRO, GRO, and BTEX. Monitoring wells will be surveyed and a potentiometric map developed based on surveyed elevations |
Bill O'Connell |
| 5/10/2013 |
Update or Other Action |
A discrete area of hydrocarbon contamination in soil was noted southeast of the Old MCC Fuel Dock during trenching for gas line installation in 2012. |
Bill O'Connell |
| 6/19/2013 |
Document, Report, or Work plan Review - other |
Date of receipt of 2012 Site Characterization and Monitoring report reviewed 10/2/13. This work was performed according to the 2012 Site Assessment Work Plan. 13 boreholes were advanced and samples collected from each borehole were analyzed for GRO, DRO, BTEX and PAHs (Soil results table not included in hardcopy report but included on disc). DRO exceed the Method One cleanup level of 500 mg/kg in eight of 26 locations sampled, RRO exceeded Method One at two locations, GRO exceeded at six locations and Method Two at two locations. Total BTEX exceeded the Method One criteria of 15 mg/kg at four locations. No other compounds exceed cleanup criteria.
Six new wells were installed, developed, and sampled, along with three existing wells, for GRO, DRO, and BTEX. DRO was detected up to 13 mg/L, GRO up to 5.5 mg/L, benzene up to 0.03 mg/L. TAH was exceeded in six wells up to 2.47 mg/L.
Four surface water locations were samped and analyzed for GRO, DRO, BTEX, and PAHs. All four SW locations exceeded TAH criteria and two exceed TAqH. |
Keather McLoone |
| 8/8/2013 |
Document, Report, or Work plan Review - other |
Reviewed MCC Old Fuel Dock water quality monitoring work plan. Pore water samples will be collected from 9 wells, surface water samples will be collected from one established monitoring location and field observations will be recorded. |
Bill O'Connell |
| 3/28/2014 |
Document, Report, or Work plan Review - other |
Date of receipt of 2013 RCRA Annual Report. Appendix A addresses work conducted at SWMU Project Groups to Fulfill Other Obligations and includes documenting the type of work performed during the summer of 2013 at this site. Results are to be reported elsewhere. In 2013, nine monitoring wells were sampled for GRO, DRO, and BTEX. Surface water was not present for sampling. |
Keather McLoone |
| 4/14/2014 |
Document, Report, or Work plan Review - other |
Date of receipt of 2013 Monitoring report. Field activities intended were surface water and active-layer sampling. Surface water was not sampled due to it not being present. Nine active-layer wells were sampled for BTEX, DRO and GRO. GRO exceeded in one well, DRO in six wells, and benzene in two wells. |
Keather McLoone |
| 7/30/2014 |
Document, Report, or Work plan Review - other |
Date of receipt of hardcopy (email copy on 7/25/14) of Water Quality Monitoring Work Plan. Nine wells and one surface water location will be sampled (in addition to 2 duplicates and a MS/MSD) for GRO/DRO and BTEX. A PAH sample will also be collected at the surface water location. |
Keather McLoone |
| 9/4/2014 |
Site Visit |
|
Keather McLoone |
| 5/28/2015 |
Document, Report, or Work plan Review - other |
Date of receipt of document entitled MCC Old Fuel Dock 2014 Contaminated Sites Monitoring Report. Meeting on June 10th was also held to discuss results and proposed 2015 activities. Nine wells with water present were sampled. Six were installed around 2012 and three were installed in the 1990s but it is unclear if they were ever sampled. Report response letter requests that future reporting make this more clear so that claims about plume stability based on historical data can be more readily evaluated for completeness. Flow direction appears to be WSW and hydrocarbon impacts limited to mostly DRO - according to the meeting presentation. However, GRO has been detected up to 7.1 mg/l (2013), benzene up to 0.039 mg/L, TAH orders of magnitude above criteria. The meeting presentation also indicated that the contamination was focused in the middle area of the site but the groundwater plume does not appear to be completely delineated based on the figure displaying 2014 results. |
Keather McLoone |
| 8/9/2016 |
Document, Report, or Work plan Review - other |
Reviewed the 2016 Contaminated Sites Soil & Water Quality Monitoring Work Plan, dated August 2016. Proposed activities mainly consist of monitoring well sampling, surface water sampling, and surface soil sampling. |
Joshua Barsis |
| 3/9/2017 |
Document, Report, or Work plan Review - other |
Reviewed the 2016 Contaminated Sites Monitoring Report, dated February 15, 2017 for the BPX MCC Old Fuel Dock site. The report describes the surface water inspection and monitoring well sampling completed in 2016 and also includes a work plan for the 2017 activities.
Surface water inspection and monitoring well sampling was conducted on August 15, 2016. Visual inspection of the south and west sides of the site were inspected to identify small surface water bodies for sample collection; however a surface water sample could not be collected because surface water was not present within the ditches.
Nine monitoring wells (MW1-12, MW1-94, MW2-12, MW2-94, MW3-12, MW3-94, MW4-12, MW5-12 and MW6-12) were sampled and submitted for analysis of diesel range organics (DRO), gasoline range organics (GRO), and benzene, toluene, ethylbenzene, and xylenes (BTEX). Two of these wells (MW4-12 and MW6-12) are considered closely connected to surface water. Therefore, the results from these wells were compared to the Alaska Water Quality Standards (AWQS) for total aromatic hydrocarbons (TAH).
Concentrations of DRO exceeded the Table C groundwater cleanup level (GCLs) in eight of nine wells, ethylbenzene exceeded GCLs in six of nine wells, GRO, benzene, and xylenes each exceeded their respective GCLs in two of nine wells, and the calculated TAH levels exceeded AWQS in both wells MW4-12 and MW6-12.
Groundwater flow direction generally follows with pad topography and varies over time, but was measured during this event as flowing northwest at a gradient of 0.003 feet per foot. It does not appear that the contamination at this site has been fully bounded.
Report recommendations indicate that additional investigation may be necessary in the future to delineate the extent of contamination; however recommends continuing with monitoring in 2017 to gather more information. Proposed 2017 activities mainly consist of inspecting and sampling surface water, if present, and completing another round of groundwater monitoring at the same nine wells sampled in 2016.
ADEC requested a final report for the 2017 activities be submitted by April 1, 2018. |
Joshua Barsis |
| 7/18/2018 |
Document, Report, or Work plan Review - other |
Reviewed the 2017 Contaminated Sites Monitoring Report and 2018 Work Plan, dated July 2018 for the BPX MCC Old Fuel Dock site. The report describes the surface water inspection and monitoring well sampling completed in 2017 and also includes a work plan for the 2018 activities.
Surface water inspection and monitoring well sampling was conducted in August 2018. Two surface water samples (SW-1 and SW-2) were collected and analyzed for benzene, toluene, ethylbenzene, and xylenes (BTEX) and polycyclic aromatic hydrocarbons (PAHs) to allow for calculation of total aromatic hydrocarbons (TAH) and total aqueous hydrocarbons (TAqH). Eight of nine planned monitoring wells (MW1-12, MW1-94, MW2-12, MW2-94, MW3-12, MW4-12, MW5-12 and MW6-12) were sampled and submitted for analysis of diesel range organics (DRO), gasoline range organics (GRO), and BTEX. Two of these wells (MW4-12 and MW6-12) are considered closely connected to surface water. Therefore, the results from these wells were compared to the Alaska Water Quality Standards (AWQS) for total aromatic hydrocarbons (TAH). Well MW3-94 was submerged and could not be sampled.
None of the surface water analytical results exceeded AWQS criteria for TAH or TAqH. Concentrations of DRO and ethylbenzene were reported above Table C groundwater cleanup level (GCLs) in five of eight wells, benzene exceeded GCLs in two of the wells, xylenes were above GCLs in three of the eight wells, and the calculated TAH levels exceeded AWQS in both wells MW4-12 and MW6-12.
Groundwater flow direction generally follows with pad topography and varies over time, but was measured during this event as flowing generally northwest at an average gradient of 0.008 feet per foot. It does not appear that the contamination at this site has been fully bounded.
Report recommendations indicate that additional investigation may be necessary in the future to delineate the extent of contamination; however recommends continuing with monitoring in 2018 to gather more information. Proposed 2017 activities mainly consist of inspecting and sampling surface water, if present, and completing another round of groundwater monitoring at the same nine wells sampled in 2017.
|
Joshua Barsis |
| 7/30/2019 |
Document, Report, or Work plan Review - other |
Reviewed the 2018 Contaminated Sites Monitoring Report and 2019 Work Plan, dated July 18, 2019 for the BPX MCC Old Fuel Dock site. The report was submitted in two formats, the classic PDF-style reporting, and in HTML.
The report described the surface water inspection and monitoring well sampling that was completed in 2018 and also includes a work plan for the 2019 activities. Surface water inspection and monitoring well sampling was conducted in August 2018. Two surface water samples (SW-1 and SW-2) were collected and analyzed for benzene, toluene, ethylbenzene, and xylenes (BTEX) and polycyclic aromatic hydrocarbons (PAHs) to allow for calculation of total aromatic hydrocarbons (TAH) and total aqueous hydrocarbons (TAqH). All nine monitoring wells (MW1-12, MW2-94, MW3-12, MW4-12, MW5-12, MW6-12, MW1-94, MW2-94, and MW3-94) were sampled and submitted for analysis of diesel range organics (DRO), gasoline range organics (GRO), and BTEX. Two of these wells (MW4-12 and MW6-12) are considered closely connected to surface water. Therefore, the results from these wells were compared to the Alaska Water Quality Standards (AWQS) for TAH.
None of the surface water analytical results exceeded AWQS criteria for TAH or TAqH. However, the sample collected from Well MW6-12 (considered hydrologically connected to surface water) exhibited levels of TAH and TAqH at 46.1 µg/l and 57.7 µg/l, respectively, and above the applicable AWQS. Samples collected from Wells MW1-94 (1,570 µg/l), MW3-12 (2,950 µg/l), and MW3-94 (6,770 µg/l) all had detectable levels of DRO exceeding the Table C groundwater cleanup level (GCL) of 1,500 µg/l. Wells MW3-12 and MW3-94 also had exceedances of benzene, ethylbenzene, and xylenes.
Report recommendations (2019 work plan) consist of continuing with monitoring in 2019, minus analysis of GRO in some wells. ADEC issued a letter on July 31 approving the report and work plan.
|
Joshua Barsis |
| 7/31/2019 |
Document, Report, or Work plan Review - other |
Reviewed of the 2018 Contaminated Sites Monitoring Report and 2019 Work Plan, dated July 18, 2019 for the BPX MCC Old Fuel Dock site. The report was submitted in two formats, the classic PDF-style reporting, and in HTML. Below is a description of the work performed in 2018. ADEC will submit comments on the HTML report separate from this report.
The report describes surface water inspection and monitoring well sampling completed in 2018 and also includes a work plan for the 2019 activities. Surface water inspection and monitoring well sampling was conducted in August 2018. Two surface water samples (SW-1 and SW-2) were collected and analyzed for benzene, toluene, ethylbenzene, and xylenes (BTEX) and polycyclic aromatic hydrocarbons (PAHs) to allow for calculation of total aromatic hydrocarbons (TAH) and total aqueous hydrocarbons (TAqH). All nine monitoring wells (MW1-12, MW2-94, MW3-12, MW4-12, MW5-12, MW6-12, MW1-94, MW2-94, and MW3-94) were sampled and submitted for analysis of diesel range organics (DRO), gasoline range organics (GRO), and BTEX. Two of these wells (MW4-12 and MW6-12) are considered closely connected to surface water. Therefore, the results from these wells were compared to the Alaska Water Quality Standards (AWQS) for TAH and TAqH.
None of the surface water analytical results exceeded AWQS criteria for TAH or TAqH. However, the sample collected from Well MW6-12 (considered hydrologically connected to surface water) exhibited levels of TAH and TAqH at 46.1 µg/l and 57.7 µg/l, respectively, and above the applicable AWQS. Samples collected from Wells MW1-94 (1,570 µg/l), MW3-12 (2,950 µg/l), and MW3-94 (6,770 µg/l) all had detectable levels of DRO exceeding the Table C groundwater cleanup level (GCL) of 1,500 µg/l. Wells MW3-12 and MW3-94 also had exceedances of benzene, ethylbenzene, and xylenes.
Report recommendations (2019 work plan) consist of continuing with monitoring in 2019, minus analysis of GRO in some wells.
|
Joshua Barsis |
| 1/25/2022 |
Document, Report, or Work plan Review - other |
Received 2021 Contaminated Site Monitoring Report and Proposed Work plan dated January 25, 2022. |
Andrea Carlson |
