| Action Date |
Action |
Description |
DEC Staff |
| 12/27/1993 |
Site Added to Database |
GRO. |
Former Staff |
| 12/27/1993 |
Site Ranked Using the AHRM |
Initial ranking. |
Former Staff |
| 1/24/1994 |
Update or Other Action |
(Old R:Base Action Code = FI - Field Inspection (General)). FI to investigate other possible sources of contamination for this spill. The only source identified was the Tesoro gas lines. |
Former Staff |
| 3/4/1994 |
Site Ranked Using the AHRM |
Reranked. |
Former Staff |
| 5/10/1994 |
Preliminary Assessment Approved |
(Old R:Base Action Code = SA1R - Phase I SA Review (CS/LUST)). The investigation showed an area of contamination approximately half the size of a football field that was contaminated from a historical gasoline pipeline leak. Free product was found around the area close to where the pipeline had been repaired. Tesoro is working on plans for further site assessment. |
Former Staff |
| 6/1/1995 |
Update or Other Action |
(Old R:Base Action Code = SA1R - Phase I SA Review (CS/LUST)). In order to define the contamination plume better, additional monitoring wells are to be installed based on a review of prior test results. |
Donald Seagren |
| 12/1/1995 |
Site Characterization Workplan Approved |
(Old R:Base Action Code = RAPR - Remedial Action Plan Review (CS)). Reviewed plan for additional sampling at this site and installation of additional monitor wells. |
Don Fritz |
| 4/11/1997 |
Update or Other Action |
The work plan for implementation of a pilot study air sparging/vapor extraction system was approved. |
Don Fritz |
| 3/9/1998 |
Cleanup Plan Approved |
Work plan for full scale air sparging/vapor extraction approved. |
Don Fritz |
| 5/7/2004 |
Update or Other Action |
File number assigned and entered into the Fileroom DB and CS DB. |
Alyce Hughey |
| 8/12/2004 |
Site Characterization Report Approved |
Reviewed January 2004 quarterly monitoring report, began review of past reports and file. |
Don Fritz |
| 10/12/2005 |
GIS Position Updated |
Using Figures 1 and 2 from a July 2001 Quarterly Monitoring Report, from Kent & Sullivan, dated October 19, 2001, in conjunction with TopoZone Pro and the KPB Parcel Lookup, entered the coordinates for this site. Metadata includes No Topo Basemap, TopoZone Pro Street Maps, Black and White Aerial Photo, on a Medium Size Map, View Scale 1:25,000, Coordinate Datum NAD83. High degree of confidence in accuracy of location. |
Alyce Hughey |
| 3/23/2006 |
Update or Other Action |
Contaminated sites staff approved a request by Tesoro to shut down the existing air sparge/soil vapor extraction system at the Bernice Creek Plume source area due to fouling of the air sparge wells. The air sparge system was delivering very little air to the subsurface and the performance of the soil vapor extraction system had significantly declined from historic levels. Tesoro intends to install new air sparge wells in April and plans to have the new air sparge system approved and operational before July. |
Don Fritz |
| 6/27/2006 |
Cleanup Plan Approved |
Work plan for reconfiguring the air sparge system, utilizing a new blower and connecting the system to 11 existing sparge wells and the 6 recently installed sparge wells wa approved. |
Don Fritz |
| 2/7/2007 |
Update or Other Action |
Reviewed the 2006 Groundwater Monitoring Report for the Kenai Pipeline Facility prepared by Kent & Sullivan, Inc, and provided written review comments to Tesoro. |
Don Fritz |
| 3/20/2008 |
Exposure Tracking Model Ranking |
Initial ranking with ETM completed. |
Don Fritz |
| 11/3/2011 |
Update or Other Action |
This site is being worked in connection with the Tesoro KPL Facility - 1999 release. Groundwater monitoring is being conducted at this site. The last groundwater monitoring report received in our office was for a 2010 Groundwater Monitoring Report, dated February 12, 2011, from Kent & Sullivan, Inc. |
Alyce Hughey |
| 11/16/2011 |
Update or Other Action |
Site transferred from Don Fritz to Peter Campbell per Paul Horwath. |
Alyce Hughey |
| 11/30/2011 |
Document, Report, or Work plan Review - other |
Reviewed the 2010 Groundwater Monitoring Report, Kenai Pipeline Company, dated Februaray 12, 2011, from Kent & Sullivan. The 2010 field activities included assessing the groundwater quality in water supply wells twice a year, annual groundwater monitoring and the installation of five Air Sparge Wells in the Bernice Creek Plume Area. The two drinking water wells were sample on January 25, 2010 and July 13, 2010 with Benzene being detected in RT-5 at a concentration of 0.00077 mg/L in the July sample results. A confirmation sample is planned to be taken in January of 2011 from RT-5 to evaluate these results. The groundwater monitoring wells and beach seep sample were taken July 8th through 13th of 2010. The Pipeline Manifold Plume Area concentrations are remaining consistent, with the beach seep sample taken not detecting any of the analytes. The Bernice Creek Plume Area has shown some increases in concentrations within the Bernice Creek Plume at concentrations of 0.0956 to 48.5 mg/L Benzene, 0.526 to 38.1 mg/L Toluene, 2.62 to 5.17 mg/L Ethylbenzene, 17.99 to 23.06 mg/L Xylenes and 54.0 to 201.0 mg/L GRO. The Pond 2 Area concentrations are remaining consistent with some increases and decreases. The Beach/Dock Plume Area is remaining consistent with previous samplings with the newly installed down-gradient monitoring well not detecting any of the analytes. The Bernice Creek Air Sparge System, South Lobe Air Sparge System was operating continuously during 2010 as scheduled. The five new Air Sparge Wells (ASP-30 to ASP-34) were installed on June 17, 2010, and are scheduled to start operation in early 2011. |
Alyce Hughey |
| 5/15/2012 |
Document, Report, or Work plan Review - other |
Reviewed the 2011 Groundwater Monitoring Report, Kenai Pipeline Company, dated April 16, 2012, from Kent & Sullivan. The 2011 field activities included assessing the groundwater quality in water supply wells twice a year, annual groundwater monitoring to assess the groundwater plumes and the startup of the five new Air Sparge Wells in the Bernice Creek Plume Area. The two drinking water wells were sample on January 18, 2011 and July 1, 2011 with none of the analytes being detected. The groundwater monitoring wells were sampled July 1st through 8th of 2011. The startup of the five new Air Sparge Wells was conducted on March 28, 2011 in the Bernice Creek Plume Area. The monitoring wells were gauged on June 30, 2011, and no light non-aqueous phase liquid was detected in the wells. For the Pipeline Manifold Plume Area, MW-27 concentrations above the groundwater cleanup levels have returned after an anomalous low concentration in 2009. MW-88 has been non-detect for two consecutive years, MW-5, MW-59, MW-60 and MW-72 are showing decreasing trends. For the Bernice Creek Plume the Source Area Wells are showing somewhat erratic concentration trends, except for MW-24 and TMW-2 that is showing an increase since 2009, indicating that the AS system may not be operating properly in this area. Tesoro plans to assess and make any improvements in 2012. The Central Plume Wells are showing a declining trend other than TMW-14 which showed increases in 2010 and 2011. The West Lobe Wells are showing a declining trend. The South Lobe down-gradient wells are showing a declining trend other than MW-6 which has shown increases. The lower South Lobe AS system was shut off in 2011 for a rebound test. MW-79 was sampled and will be sampled to evaluate the potential contaminant migration in the South Lobe Plume Area. Drinking water wells RT-4 continues to show no impact and well RT-5 has returned to non-detect after benzene was detected in July of 2010. For the Pod 2 Area shallow wells are showing signs of much improvement, with MW-19-S returning to historical high concentration levels. For the Beach/Dock Plume Area MW-20 concentrations are above historical levels and it is thought to be from construction activities that took place near the well in 2011, and mobilized the hydrocarbon contaminants to the water table. DRO was detected in MW-97 for the first time, and additional sampling events are needed to determine the significance of these results.
|
Alyce Hughey |
| 4/25/2013 |
Document, Report, or Work plan Review - other |
Reviewed the 2012 Groundwater Monitoring Report, dated April 8, 2013, from Kent & Sullivan. The 2012 groundwater monitoring events were performed on January 10 with samples collected from two water supply wells, on July 18th through 19th consisting of a comprehensive site groundwater monitoring to assess the groundwater plumes and on August 14th from one water supply well (RT-5) that had detections during the July sampling. The monitoring wells were gauged on July 17th with no light non-aqueous phase liquid being detected in the wells. The depth to groundwater ranged from 4.25 to 82.95 feet. The groundwater level across the Kenai Pipeline facility was higher in July than at any other time since 1996. The Pipeline Manifold Plume area well MW-27 contained Xylenes and GRO concentrations slightly above historical concentrations. Well MW-88 had high Benzene and GRO results, and wells MW-5, MW-59, MW-60, and MW-72 are showing decreasing trends. The Bernice Creek Plume area wells MW-24 and TMW-2 have been showing an increase in Benzene concentrations over the past 10 to 12 years. It is thought that these wells may be rebounding after operation of the soil vapor extraction system in the 1990’s. Concentrations in the central area of the plume continue to decrease. TMW-12 has been non-detect for the past three years and TMW-13 and TMW-14 were at historic lows, probably as a result of the expanded sparge system in 2011. Wells MW-54 and MW-55 in the west plume lobe showed increased benzene for unknown reasons, where MW-63 down-gradient of these wells was at a historic low. MW-79 and MW-94 remains non-detect. Drinking water well RT-5 contained Benzene, Toluene and Xylenes in the July sample. This well was re-sampled in August, and analytes were not detected. It is thought that the detections in July could have been from painting within the building during the time of sampling. The Pod 2 area concentrations remain stable with a slight increase seen. The Beach/Dock Plume area wells MW-9 and MW-21-S are remaining stable. The high levels in 2011 in MW-20 returned to normal in 2012 and the high DRO levels in MW-97 in 2011 returned to non-detect. The Bernice Creek air sparge system was operating as scheduled other than during periods of routine maintenance. In June several air lines that were broken were repaired. The south lobe air sparge system remained shut down in 2012. |
Alyce Hughey |
| 5/27/2014 |
Document, Report, or Work plan Review - other |
Reviewed the 2013 Groundwater Monitoring Report, dated May 5, 2014, prepared by Kent & Sullivan. The first groundwater monitoring event was performed on January 15, 2013 from two drinking water wells RT-4 and RT-5. The second groundwater monitoring event was conducted on July 16th through the 17th that included sampling and analyzing 30 groundwater wells. Groundwater was flowing with a southwesterly flow direction, which is consistent with previous events. The monitoring wells were gauged on July 12, 2013, and no light non-aqueous phase liquid was detected in the wells. The depth to groundwater ranged from 4.41 to 77.12 feet. The groundwater level across the Kenai Pipeline facility was higher in July than at any other time since 1996. The groundwater levels increased as much as 14 feet between July 2012 and July 2013. The increase in groundwater levels are due to an above-average snow pack in 2012 and major rain storms in the fall of 212 and spring of 2013. The Pipeline Manifold Plume Area groundwater levels rose 5.5 to 10 feet from 2012 to 2013. With the increase in groundwater levels some of the well screens may have been submerged. Wells MW-27, MW-88, MW-5, and MW-60 were non-detect, with some of these wells historically containing detectable concentrations. Tesoro plans to continue to monitor these wells to assess the Pipeline Manifold Plume Area. The Bernice Creek Plume Area monitoring well TMW-2, located near the up-gradient plume continues to increase in benzene concentrations with 0.5 mg/L. It is thought that the increase is due to high groundwater levels and high flow rate of the Bernice Creek impacting the up-gradient plume extent. The monitoring wells down-gradient of the air sparge system (TMW-12, TMW-13, and TMW-14) did not detect benzene in 2013. In addition the two drinking water wells (RT-4 and RT-5) had no detections. The groundwater rose as much as 14 feet in the Bernice Creek Plume Area. The Pond 2 Area shallow well concentrations remain stable with a slight decrease seen. The Beach/Dock Plume Area monitoring wells MW-9, MW-29 and MW-21S remained stable. Monitoring well MW-97 detected benzene for the first time at 0.00198 mg/L. Tesoro plans to continue to monitoring MW-97 during future monitoring events to see if the plume has/is migrating. The Bernice Creek air sparge system was operating continuously other than at times of routine maintenance. Several broken or disconnected air lines were repaired in June resulting in improved airflow. The south lobe of the air sparge system remained off in 2013. |
Alyce Hughey |
