| Action Date |
Action |
Description |
DEC Staff |
| 10/22/1997 |
Leaking Underground Storage Tank Release Confirmed - Petroleum |
LUST Site created in CSP for source area ID 78041 Soil contamination was discovered during removal of 5 USTs from the ground in December 1997. Four of the 5 USTs had soil contamination associated with them - one 15,000 gallon (Tank 1) and one 10,000 gallon (Tank 2) diesel and gasoline UST; one 12,000 gallon gasoline UST (Tank 4); and one 1,000 gallon waste oil UST (Tank 5). Only enough soil was excavated to remove the tanks. |
Lynne Bush |
| 10/22/1997 |
Leaking Underground Storage Tank Cleanup Initiated - Petroleum |
5 USTs were removed with 4 of them having associated hydrocarbon contamination associated with them. |
Lynne Bush |
| 10/22/1997 |
Site Added to Database |
|
Lynne Bush |
| 3/15/1998 |
Offsite Soil or Groundwater Disposal Approved |
B.C. Excavation transported 821.92 tons of stockpiled soil from USTs 1, 2, and 4 and 105.52 tons from UST 5 to Anchorage Soil Recycling for thermal treatment. |
Lynne Bush |
| 6/3/1998 |
Document, Report, or Work plan Review - other |
Review of the Gilfilian "Phase I Release Investigation" dated 5/5/1998 indicated that on 4/2-3/98 6 soil borings were drilled and 4 MWs installed bewteeen 12 and 14 feet bgs to further delineate the extent of the contamination. GRO, DRO, and BTEX in soils and GW of MW-1 and MW-2 were above cleanup levels. MW-4 had high levels of DRO, RRO, and benzene. GW flow direction was N58W at a gradient of 0.0074 ft/ft. |
Lynne Bush |
| 8/11/1998 |
Offsite Soil or Groundwater Disposal Approved |
Approval was given to Gilifilian Engineering & Environmental Testing, Inc. 8/10/98 request to direct haul contaminated soils to Alaska Soil Recycling for treatment and disposal. |
Lynne Bush |
| 8/12/1998 |
Update or Other Action |
Excavation work to remove contaminated soil from around the former USTs and fueling systems began this date. |
Lynne Bush |
| 8/17/1998 |
Cleanup Plan Approved |
ADEC approved the 8/17/98 Corrective Action Plan. |
Lynne Bush |
| 10/15/1999 |
Site Characterization Report Approved |
ADEC reviewed a copy of the Gilfilian "Phase II Release Investigation and Removal of Contaminated Soil" dated 5/14/99. GRO, DRO, RRO, and BTEX contaminated soil above cleanup levels remains in place. Excavation of some of the contaminated soil ceased due to nearby building foundation. Contamination appears to be limited vertically to the sand and gravel layer found between 9 and 11 feet bgs which was bounded beneath by a silt layer which appears to impede the vertical migration of contaminants. Limits of contamination to the north and west were not delineated. Further investigation required. ADEC requested a workplan based on 7/12/99 Phase II report by Gilfilian Engineering. |
Lynne Bush |
| 2/11/2003 |
Update or Other Action |
ADEC requested additional characterization. |
Lynne Bush |
| 6/9/2003 |
Site Characterization Workplan Approved |
The R& M Consultants, Inc. "Work Plan, Quarterly Ground Water Monitoring, Student Transportation Facility, 3580 East Tudor Road, Anchorage, Alaska 99507, Facility ID #2970" dated 6/9/03 was approved in a letter this date which also include a Notification of Recovery of Costs. |
Lynne Bush |
| 7/24/2003 |
Update or Other Action |
Site transferred from Bush to Dreyer. |
Amanda Dreyer |
| 6/18/2004 |
Conditional Closure Approved |
Reviewed the R&M Consultants, inc. "Quarterly Groundwater Monitoring Report, Student Transportation Facility 3580 Tudor Road, Anchorage, Alaska, ADEC File ID Number 3089" dated 12/4/03. 5 USTs were removed from the ground from 3 separate areas at the site 12/21-31/97. Despite extensive contaminated soil removal, soil contamination above cleanup levels remains in close proximity to the building foundation and has impacted shallow groundwater as well in the vicinity of the fueling facility at the south end of the building and may extend under the foundation. Soil contamination also remains in close proximity to the building foundation and has impacted shallow groundwater to the east side of the building where the former waste oil tank was located and may extend under the building foundation. Contaminated soil has been removed to the extent practicable and further soil removal could jeopardize the integrity of the building foundation. GW contaminated above cleanup levels exists in MWs MW-1, MW-4, and G-4. The exceedances are for GRO, DRO, RRO, benzene, and toluene. The site is almost entirely covered with asphalt pavement and/or buildings and serves to minimize precipitation infiltration to the soil. Contaminated soil has been removed from the ground to the extent practicable, and therefore it is anticipated that the GW contamination levels should decrease over time since the majority of the source material has been removed. Even though the shallow groundwater contamination remains above cleanup levels it does not pose a risk to human health or the environment and is not migrating. A No Further Remedial Action Planned letter signed by Jim Frechione was sent out this date. |
Jim Frechione |
| 6/18/2004 |
Institutional Control Record Established |
Groundwater monitoring is required until a stable or decreasing trend in contaminant concentrations is established and/or 18 AAC 75.345 Table C levels are achieved. An institutional control in the form of a database entry will be established to identify the nature and extent of contamination remaining at the site. This control will remain until soil and GW meet the established cleanup levels for the site. The excavation and transport of soil or GW from the site must be approved by ADEC in accordance with 18 AAC 75.325(i). If future information is provided that indicates hazardous substance contamination is present at levels that may pose a risk to human health or the environment, additional assessment and/or cleanup may be required. |
Jim Frechione |
| 6/18/2004 |
Long Term Monitoring Established |
Groundwater monitoring is required until a stable or decreasing trend in contaminant concentrations is established and/or 18 AAC 75.345 Table C levels are achieved. An institutional control in the form of a database entry will be established to identify the nature and extent of contamination remaining at the site. This control will remain until soil and GW meet the established cleanup levels for the site. |
Jim Frechione |
| 8/16/2004 |
Document, Report, or Work plan Review - other |
Received the R&M Consultants, Inc. "Semi-Annual Groundwater Monitoring Report, Student Transportation Facility 3580 Tudor Road, Anchorage, Alaska, ADEC File ID Number 2970" dated 6/30/04. Exceedances of the GW cleanup levels still exists at the site for GRO, DRO, RRO, and benzene. |
Bill Petrik |
| 5/12/2005 |
Site Characterization Workplan Approved |
Reviewed the R&M Consultants, Inc. "Work Plan, Annual Groundwater Monitoring Report, Student Transportation Facility 3580 Tudor Road, Anchorage, Alaska, ADEC File ID #3089. Event ID #1768" dated 4/19/05 and conditionally approved it in a letter this date. It was requested to eliminate monitoring wells G-02 and MW-3 because they cannot be located. ADEC would prefer that the wells be located and properly decommissioned to eliminate the conduit to the subsurface. If the wells cannot be located, the locational information that exists should be submitted to ADEC so it can be recorded in the CSP Database. ASD should also maintain locational information in site files and these locations should be considered in any future site projects. If the wells are identified in the future, ADEC should be notified and the wells properly decommissioned. MW-01 will be monitored using AK Methods 101 and 102. MW-041 will be monitored using AK Methods 102 and 103. ADEC concurs that metals should be eliminated from the sampling program. ADEC concurs that MW-02, G-01, G-03, and G-06 be eliminated from the sampling program because no sampling results have detected any contaminants for the last three samplings. These wells can be considered for decommissioning. Please submit a plan to the ADEC for such in the future for review and approval. File number issued 2100.26.251. FKA L68.27. |
David Pikul |
| 2/15/2006 |
Document, Report, or Work plan Review - other |
Reviewed the R&M Consultants, Inc. "Annual Groundwater Monitoring Report, Student Transportation Facility 3580 Tudor Road, Anchorage, Alaska, ADEC File ID #3089" dated 2/8/06. Monitoring well G-04 was found damaged and could not be sampled. It will be repaired and included in subsequent sampling events. Laboratory analyses results indicate elevated GRO, DRO, benzene, ethylbenzene, and total xylenes levels in MW-01 and elevated DRO and RRO in MW-04. All of these analytes identified in MW-01 have increased from the 5/5/04 monitoring event while those in MW-04 remain similar to results from that event. A letter was sent this date indicating this information and concurs with report conclusions that continued groundwater monitoring is appropriate. |
David Pikul |
| 2/1/2007 |
Document, Report, or Work plan Review - other |
Reviewed a copy of the R&M Consultants, Inc. "Annual Groundwater Monitoring Report, Student Transportation Facility 3580 Tudor Road, Anchorage, Alaska, ADEC File ID #3089" dated 1/8/07 recived by the CSP on 2/1/07. Exceedances of GW cleanup levels were detected in MW-01 for GRO, DRO, benzene, ethylbenzene, and total xylenes and in MW-04 for DRO and RRO. The CSP concurs with the report recommendation that GW sampling and monitoring continues on an annual basis for a minimum of one additional sampling event. |
Bill Petrik |
| 10/24/2008 |
Exposure Tracking Model Ranking |
Initial ranking with ETM completed for source area id: 78041 name: USTs. Vapor Intrusion a potential site concern despite the Conditional Closure. |
Bill Petrik |
| 6/17/2010 |
Update or Other Action |
Project Manager changed to Pam Clemens. |
Pam Clemens |
| 6/25/2010 |
Update or Other Action |
Reviewed file to determine status. Continued groundwater monitoring is needed, last report in file was for sampling done September 2006. I will contact RP to see if there is a more recent report. Also need to discuss the status of the monitoring wells that were unable to be sampled because they were either not found or not functioning properly (MW3 and G-02). Four others (MW2, G-01, G-03 & G-06) had no detections in 3 sampling events and sampling was discontinued. Decommissioning was requested in 2005 by ADEC but there are no reports documenting their removal. GRO, Benzene, DRO and RRO continue to exceed groundwater cleanup levels. |
Pam Clemens |
| 10/12/2010 |
Document, Report, or Work plan Review - other |
Reviewed report dated September 30, 2010 for the groundwater monitoring event July 29, 2010. Three samples and one duplicate were collected. GRO, Benzene, DRO and RRO all exceed the groundwater cleanup level. |
Pam Clemens |
| 11/17/2010 |
Update or Other Action |
Sent a letter requesting at least one more groundwater sampling event in the spring of 2011 for MW-1, MW-4 and G-04. Metals have been included again in addition to DRO, GRO, RRO and BTEX. Also requested decommissioning the monitoring wells MW-3 and G-02, if found, and requested the status of MW-2, G-01, G-03, and G-06. |
Pam Clemens |
| 2/16/2012 |
Update or Other Action |
Staff changed from Pam Clemens to IC Unit. |
Kristin Thompson |
| 7/10/2012 |
Institutional Control Compliance Review |
IC review conducted. |
Evonne Reese |
| 3/28/2013 |
Institutional Control Update |
Reviewed the 2010 groundwater monitoring report. Will issue an IC reminder letter to the RP for at least one more monitoring event. The ICs cannot be removed at this time. |
Evonne Reese |
| 5/1/2013 |
Institutional Control Update |
An IC reminder letter was issued to the responsible party on this date. |
Kristin Thompson |
| 5/29/2013 |
Institutional Control Update |
Contacted by the consultant for the RP. They are going to issue a workplan and get the groundwater sampling done this summer. |
Evonne Reese |
| 7/30/2014 |
Document, Report, or Work plan Review - other |
A groundwater monitoring and well decommissioning event took place on-site May 2014. Wells MW-02, G-1, G-2, G-3, G-5 and G-6 were decommissioned. MW-3 could not be located and the status is unknown. Samples for DRO, RRO, and BTEX were taken from MW-01, MW-04, and G-4. The MW-4 sample concentration exceeded the cleanup levels for DRO and RRO, but was below the cleanup levels for BTEX. The MW-1 sample concentrations exceeded the cleanup level for benzene but was below cleanup levels for all other analytes. The G-4 sample was non-detect for all alalytes. Results indicate that contamination is naturally attenuating with time. The next sampling event will be during the spring of 2015. |
Evonne Reese |
| 2/25/2016 |
Institutional Control Compliance Review |
IC compliance review conducted. An IC reminder letter regarding the 2015 groundwater monitoring results was issued to the responsible party on this date. |
Kristin Thompson |
| 5/18/2016 |
Institutional Control Update |
Affiliate information updated. IC reminder letter re-issued on this date. |
Kristin Thompson |
| 5/25/2016 |
Institutional Control Update |
In response to the IC reminder letter the ASD's consultant contacted me in regards to planning 2016 sampling. (Sampling was not done in 2015.) Since the 2014 sample taken from well G-04 was non-detect for all analytes, it was requested that well be omitted this year. I provided my approval for this change via email. The reminder system has been set to look for monitoring results in the fall of 2016. |
Evonne Reese |
| 9/1/2016 |
Institutional Control Update |
Groundwater monitoring was performed on June 22, 2016. A sampling report will follow in the near future. |
Evonne Reese |
| 9/1/2016 |
Institutional Control Update |
Approved the disposal/treatment of the purge groundwater from the last two sampling events. |
Evonne Reese |
| 11/8/2016 |
Document, Report, or Work plan Review - other |
Groundwater monitoring was performed in June 2016. Two wells (MW-01 and MW-04) were sampled for GRO, DRO, RRO, and BTEX. Contaminated concentrations in the samples were above cleanup levels for GRO, DRO, RRO and benzene, but these sample concentrations are substantially lower compared to the concentrations at the time of the 2004 closure and show a decreasing trend.
|
Evonne Reese |
| 11/8/2016 |
Institutional Control Update |
Since a decreasing trend in groundwater contamination has been established, future sampling is not required. The restriction of the use of groundwater for drinking and general uses will be added as an institutional control requirement in order to prevent people from being exposed to the remaining contamination in the groundwater. Other institutional control requirements will remain in place. A letter to the landowner/responsible party will be issued documenting this information. |
Evonne Reese |
| 11/15/2016 |
Institutional Control Update |
A letter was issued documenting ADEC's approval to discontinue groundwater monitoring at this site and requesting the remaining wells be decommissioned within one year. Reminder system set to follow-up on next year for the decommissioning report, and every three years for the site's periodic review. |
Kristin Thompson |
| 7/21/2017 |
Long Term Monitoring Complete |
Received a groundwater well decommissioning report for the three wells used in the long term groundwater monitoring investigation. Long term groundwater monitoring has been completed. |
Evonne Reese |
| 4/30/2018 |
Update or Other Action |
The vapor intrusion potential at this site was evaluated by the Contaminated Sites staff Quality Assurance Officer. During this evaluation it was found that the groundwater contaminant concentrations were not above the vapor intrusion actions levels therefore no further investigation is needed.
|
Evonne Reese |
| 4/30/2018 |
Update or Other Action |
We were informed by Shannon & Wilson that a Phase II Environmental Assessment will be performed on this property in this coming field season. |
Evonne Reese |
| 12/19/2019 |
Institutional Control Compliance Review |
An Institutional Controls reminder letter e-mailed to the responsible party/landowner on this date. |
Mossy Mead |
| 2/6/2023 |
Institutional Control Compliance Review |
An Institutional Controls reminder letter e-mailed to the responsible party/landowner on this date. Next reminder letter is due in 2026 for a three-year review. |
Evonne Reese |
