| Action Date |
Action |
Description |
DEC Staff |
| 2/1/2013 |
Document, Report, or Work plan Review - other |
On February 2013 contaminated soil encountered during the advancement of geotechnical borings at the site. |
Robert Weimer |
| 3/5/2013 |
Document, Report, or Work plan Review - other |
On March 2013 35 soil borings were drilled to 15 to 20 feet below ground surface were sampled. Sample location exceeded cleanup levels for benzene in the area of TH13. |
Robert Weimer |
| 3/8/2013 |
Document, Report, or Work plan Review - other |
On March 7-8, 2013 the area around boring TH13 was excavated to 10 feet below ground surface. A 32 foot by 32 foot area and a 20 foot by 8 foot wide area were excavated. Two 3/8 inch fuel lines were encountered along the northern edge of the excavation. The extent of that piping has not been defined. |
Robert Weimer |
| 3/18/2013 |
Document, Report, or Work plan Review - other |
On March 18, 2013 seven borings were sampled to help define the extent of the benzene contamination on this property. The consultant estimated up to a 16,000 square foot area on the property to be contaminated by benzene over cleanup levels. |
Robert Weimer |
| 7/15/2013 |
Site Added to Database |
A new site has been added to the database |
Mitzi Read |
| 7/15/2013 |
Exposure Tracking Model Ranking |
Initial ranking with ETM completed for source area id: 79486 name: Equipment Yard |
Mitzi Read |
| 7/22/2013 |
Document, Report, or Work plan Review - other |
The revised 1.2 Corrective Actions Work Plan provided on July 22, 2013 is approved under the following conditions:
1. Complete copies of field notes are to be included in the report.
2. All soil excavated as part of the corrective action work needs field screening and analytical sampling as per Table 2 in the work plan. This soil is to be placed on a liner (minimum 10 mil) and covered (minimum 6 mil reinforced) until analytical results are reviewed by DEC and the soil is approved by DEC for treatment/disposal.
|
Robert Weimer |
| 7/22/2013 |
Update or Other Action |
Received notification from the RPs consultant (RSE) that they had encounted a partially crushed buried drum containing an unknown liquid about 15 feet west of test boring TB15. They plan to sample the drums contents tomorrow. |
Robert Weimer |
| 7/23/2013 |
Document, Report, or Work plan Review - other |
A buried drum (Drum-1) was removed along with 30 to 35 cubic yards of surrounding contaminated soil. This area was backfilled later in 2013. |
Robert Weimer |
| 8/7/2013 |
Update or Other Action |
Received notification from the RPs consultant (RSE) that they have removed 30 to 40 cubic yards of contaminated soil from the area where they encounted a partially crushed buried drum containing an unknown liquid about 15 feet west of test boring TB15. They said that the drum contained water and kerosene mixture. Based on the soil samples collected the contamination is consistant with a release of kerosene (diesel fuel). The 30 to 40 yards of contaminated soil is currently stockpiled on the property on a bermed liner and covered. They will let me know when they plan to excavate the other contaminated area in the work plan, they hope to do that within a few weeks. |
Robert Weimer |
| 8/7/2013 |
Offsite Soil or Groundwater Disposal Approved |
Approved transport and treatment of 5 gallons of oily water from the buried drum. The oil water had 84.2 ug/l arsenic, 101 ug/l lead, 1.83 ug/l benzene, and 71.1 ug/l Naphthalene. A soil sample was also collected from the drum had 7.91 mg/kg arsenic, 14.2 mg/kg lead, non-detect (<0.0476 mg/kg) PCB, 3.18 mg/kg naphthalene, non-detect (<0.0175 mg/kg) benzene, 20.9 mg/kg GRO, 2,960 mg/kg DRO, and 2,710 mg/kg RRO. |
Robert Weimer |
| 8/8/2013 |
Document, Report, or Work plan Review - other |
On August 8-9, 2013 five peat samples were collected at the property to help evaluate naturally occurring concentrations of DRO and RRO in the peat at this site. |
Robert Weimer |
| 8/9/2013 |
Document, Report, or Work plan Review - other |
On August 9, 2013 fourteen test pits were sampled to help define the nature and extent of the soil contamination at this site. |
Robert Weimer |
| 8/17/2013 |
Document, Report, or Work plan Review - other |
On August 15-17, 2013 areas Unit 1 through Unit 6 were excavated and sampled. Fill was encountered to a depth of 4 feet below ground surface (bgs), peat 4 to 12 feet bgs, and clay at 12 feet bgs at the base of the excavation. Two drums (Drum 2 and Drum 3) were encountered during the excavation of Unit 4. |
Robert Weimer |
| 8/20/2013 |
Document, Report, or Work plan Review - other |
On August 16-20, 2013 soil samples were collected from 5 temporary stockpiles currently stored on the property. This soil was generated during past excavation activities. |
Robert Weimer |
| 8/20/2013 |
Update or Other Action |
On August 16, 2013 two additional buried drums found during the excavation south of unit 4. On August 20, 2013 one sample submitted to lab that was a composite of the liquid from both drums. The liquid in both drums had a sheen and hydrocarbon odor. Results of the drum sample not submitted to ADEC. |
Robert Weimer |
| 8/23/2013 |
Document, Report, or Work plan Review - other |
On August 23, 2013 soil samples were collected from the base of excavation area Unit 1 through Unit 6. The base of the excavation was at 12 feet below ground surface from the clay layer that was just below the fill and peat layers. |
Robert Weimer |
| 9/25/2013 |
Meeting or Teleconference Held |
Meeting with RP's consultant (RSE) to discuss current site status and future site work. The site developer was not able to get to all of the identified contaminated areas on the northern portion of the property. They plan to complete the work in 2014. So far groundwater has not been encountered during the excavation work in the contaminated areas. Excavated potentially contaminated soil is currently stockpile on-site on a liner. The peat stockpile is to be sampled this fall. The other stockpiles have been sampled and they will submit a report of the results. We discussed that we should be able to approve the stockpiles that test below default cleanup levels for reuse on property not in contact with the groundwater. |
Robert Weimer |
| 9/26/2013 |
Document, Report, or Work plan Review - other |
On September 26, 2013 soil samples were collected from the peat stockpiles. |
Robert Weimer |
| 10/31/2013 |
Potentially Responsible Party/State Interest Letter |
PRP letter sent to property owner Alaska Rubber Supply |
Robert Weimer |
| 12/9/2014 |
Document, Report, or Work plan Review - other |
December 3, 2014 stockpile sampling plan is approved with the following clarifications:
1. Drum stockpile: Add Lead and RRO analysis for all samples. Two analytical sample locations and one duplicate. Most likely contaminated location sample run for the full PAHs. Minimum of 5 field screening samples.
2. Peat stockpile: Six analytical samples and one duplicate. Most likely contaminated location sample run for the full PAHs.
3. 500 cubic yard five stockpiles: One analytical from each stockpile. One duplicate sample total. Minimum of 5 field screening locations for stockpiles of 50 cubic yards or less, 1 field screening per 10 cubic yards or part thereof for stockpiles over 50 cubic yards. Most likely contaminated location sample run for the full PAHs.
4. The analytical samples are to be collected directly from freshly exposed location that had the highest field screening readings/most likely contaminated based on observations. If an analytical sample can’t be collected directly from the stockpile, then it can be collected from freshly exposed soil in the excavator bucket.
5. PCB sampling may be required in the future if specific soils are proposed to be thermally treated.
ADEC looks forward to receiving the complete report of the previous site work (including information as to the source of the Boney C soil stockpile), and this site work.
|
Robert Weimer |
| 1/9/2015 |
Site Visit |
Site visit to observe current site conditions. Piles covered. Half of the "Boney C" that is purported to be a clean fill stockpile no longer on the site. |
Robert Weimer |
| 5/21/2015 |
Offsite Soil or Groundwater Disposal Approved |
ADEC concurs with consultants recommendation that the excavation water be also sampled for GRO, DRO, and RRO to evaluate whether it meets AWWU permit requirements to be discharged into the nearby sanitary sewer. |
Robert Weimer |
| 6/11/2015 |
Offsite Soil or Groundwater Disposal Approved |
Based on the excavation water sample meeting Table C cleanup levels, ADEC has no objection to the discharge of the estimated 800,000 gallons of excavation water to the sanitary sewer system with AWWU approval. |
Robert Weimer |
| 8/7/2015 |
Site Visit |
Site visit to observe current site conditions in preparation for excavation dewatering. Observed that two underground storage tank vent pipes remain on the eastern portion of the property that need to be properly removed and assessed. They may be connected to underground storage tanks. |
Robert Weimer |
| 8/14/2015 |
Site Visit |
Site visit to observe site conditions. Sheens had been observed on the groundwater of the southern excavation yesterday. |
Robert Weimer |
| 8/14/2015 |
Update or Other Action |
Update from consultant (BGES) that they mentioned this morning, a sheen developed on the southern (smaller) excavation overnight. They did not pump any water from this excavation last night and we have not initiated any dewatering from this excavation today.
They checked the sheen in the southern (smaller) excavation to see if it behaves similar to a biogenic sheen or petroleum sheen. The sheen spilt up in chunks when it was touched, which suggests the sheen is biogenic related.
They collected a water sample from the southern (smaller) excavation and a water sample from the tank near the discharge point into the sanitary sewer system. These water samples will be submitted to the laboratory for analysis with a 2 to 3 day turnaround time. They will not re-start the dewatering activities from this excavation until we receive some analytical results.
They are continuing to dewater the northern (larger) excavation because they have not observed any signs of contamination (sheen or odors).
|
Robert Weimer |
| 8/20/2015 |
Update or Other Action |
Update from consultant (BGES) that the sheen observed on the southern (smaller) excavation appears to be biogenic. Water samples collected from that excavation was non-detect for GRO, DRO, RRO, TAH (total aromatic hydrocarbons) and metals except for nickel (up to 0.0111 mg/l) and arsenic (up to 0.0814 mg/l) which meet AWWU discharge limits (3.88 mg/l for nickel and 3.7 mg/l for arsenic). ADEC has no objection to resuming pumping of water from the southern excavation and discharge to the AWWU sanitary sewer in accordance with their permit. |
Robert Weimer |
| 8/24/2015 |
Site Visit |
Site visit with consultant (BGES) and owner's representative to discuss future site work. They will line up a UST worker and submit a closure notice for the two vent pipes and any associated tanks that they may be connected to, but the vent piping may have been connected to the old USTs that were removed in 1998. They will submit a plan for the work to be done this year, including reusing soil that meets default cleanup levels for the berms for the proposed treatment cells. |
Robert Weimer |
| 9/8/2015 |
Document, Report, or Work plan Review - other |
ADEC approves the September 2, 2015 Work Plan with additional information and clarifications provided on September 8, 2015. The work to be conducted in 2015 includes reusing certain soils on-site (STK1, STK2, STK3, STK4, and STK6), constructing soil treatment cells, and collecting confirmation soil samples from the east and north sidewalls of the excavation and the base of the excavation. Additional site work is to be conducted in 2016 under separate work plan to be submitted for ADEC review and approval. ADEC requests that the work plan for the additional site work be submitted by no later than March 1, 2016. Also the UST vent pipes are to be properly closed and assessed in 2015.
|
Robert Weimer |
| 9/22/2015 |
Site Visit |
Site visit to observe the sampling of the north excavation and the condition of the soil storage cell and to discuss planned site work for the remainder of 2015. |
Robert Weimer |
| 10/7/2015 |
Site Visit |
Site visit to observe the progress with the site work and the exposed vent piping runs. |
Robert Weimer |
| 10/8/2015 |
Underground Storage Tank Site Characterization or Assessment |
The two vent pipe are to be removed and assessed today. They appeared to have been connected to the former two underground storage tanks that had been removed in 1998.
According to the original tank registration records one of the tanks was unleaded gas and the other was regular leaded gas. Because of the past use of leaded fuel ADEC is requesting the analysis to include Lead, EDB (method 8011) and 1,2-DCA (method 8260 – which will also give you the required BTEX). ADEC is requesting analytical samples (one for a volume of up to 10 cubic yards, two for 11 to 50 cubic yards) from the soil excavated to expose/remove the piping, from the most likely contaminated area of contamination for the excavated soil (a minimum of 5 field screening locations in the excavated soil). ADEC is also requesting a minimum of one analytical sample from just below the piping from the most likely contaminated area of the piping (based on field readings/observations). |
Robert Weimer |
| 11/3/2016 |
Update or Other Action |
DEC email to consultant to check on the site work done in 2016. |
Robert Weimer |
| 11/8/2016 |
Update or Other Action |
Update from consultant the no site work was conducted in 2016. They are currently finalizing a report for the 2015 site work. |
Robert Weimer |
| 6/30/2017 |
Document, Report, or Work plan Review - other |
DEC letter approving BGES’s June 29, 2017 Revised Work Plan for Cleanup Activities, Soil Stockpile Characterization, and Remediation Activities. The work plan proposes to collect soil samples from an existing stockpile, excavate and sample a surface stained area, conduct excavation dewatering and backfill it with clean material, and prepare a report for the 2015 and 2017 site work. |
Robert Weimer |
| 7/14/2017 |
Update or Other Action |
Based on the results of the sampling of the stained soil ADEC approves a reduction in the analysis for the stained soil area excavation to just DRO and RRO, the only compounds found over migration to groundwater cleanup levels. |
Robert Weimer |
| 8/24/2017 |
Offsite Soil or Groundwater Disposal Approved |
DEC approves the transport to and disposal at the Anchorage Regional Landfill of the 75 cubic yard stockpile that was generated in 2013 with December 2014 samples DSTK-2-1211, DSTK-5-1211, and DSTK-8-1211. |
Robert Weimer |
| 8/24/2017 |
Offsite Soil or Groundwater Disposal Approved |
DEC approves the transport to and thermal treatment at ASR of the 1 cubic yard stockpile of surface stained soil that was excavated in July 2017. |
Robert Weimer |
| 8/24/2017 |
Offsite Soil or Groundwater Disposal Approved |
DEC approves the transport and treatment at NRC of one drum of 30 gallons of contaminated water. |
Robert Weimer |
| 8/25/2017 |
Document, Report, or Work plan Review - other |
DEC approves plan to remove 5 to 10 cubic yards of soil from the stockpile location that exceeded cleanup levels and then collected analytical samples (based on field readings) from the sidewalls of the excavated area to demonstrate that the remaining stockpile soils are below cleanup levels for naphthalene. |
Robert Weimer |
| 9/8/2017 |
Offsite Soil or Groundwater Disposal Approved |
DEC approves the transport to and disposal at the Anchorage Regional Landfill of 10 cubic yards of naphthalene contaminated soil from the 182 cubic yard stockpile that was sampled on July 11, 2017. The consultant took sidewall samples on August 28, 2017 to demonstrate that the naphthalene contamination did not extend to the remaining portion (172 cubic yards) of the stockpile. Based on the information provided the remaining potion is approved for reuse on the property. |
Robert Weimer |
| 9/21/2017 |
Offsite Soil or Groundwater Disposal Approved |
DEC approves request for the transport and treatment at ARL hazardous waste program of one drum of 30 gallons of contaminated water instead of NRC as requested earlier. |
Robert Weimer |
| 12/31/2018 |
Update or Other Action |
On December 31, 2018 ADEC requested update on site work and reports for this site. |
Robert Weimer |
| 8/7/2019 |
Meeting or Teleconference Held |
Talked with consultant they will provide an electronic copy of the 2017 report and previous peat stockpile sampling data. |
Robert Weimer |
| 8/9/2019 |
Document, Report, or Work plan Review - other |
The 680 cubic yard peat stockpile was sampled for BTEX, GRO, DRO, RRO, and PAHs (one sample and its duplicate) on December 11, 2014. Of the 7 samples and one duplicate collected 4 of them exceeded cleanup levels for DRO (up to 659 mg/kg). All other analytes were below cleanup levels (2014 and current). The higher DRO samples were in the soils with lower % solids (more organics). This stockpile is currently on property on a liner and covered. |
Robert Weimer |
| 9/6/2019 |
Document, Report, or Work plan Review - other |
DEC approves the spreading on property of the 680 cubic yard peat stockpile. That stockpile was sampled on August 14, 2019 and had between 65.2 mg/kg and 322 mg/kg DRO. Based on a review of the chromatograms the laboratory concluded that the remaining DRO was biogenic, DEC review concurs with that conclusion. |
Robert Weimer |
| 12/18/2020 |
Document, Report, or Work plan Review - other |
DEC reviewed a work plan from BGES for installing 10 soil borings to delineate the vertical and lateral extent of the contamination. DEC approved the revised work plan that was dated 11/13/2020. |
Janice Wiegers |
| 3/9/2021 |
Meeting or Teleconference Held |
Teleconference with RP and consulant to discuss past work at this site and work plan for additional soil boring and monitoring well installation. |
Janice Wiegers |
| 3/18/2021 |
Document, Report, or Work plan Review - other |
Workplan submitted 3/1/21. DEC approved workplan but recommended slightly wider soil boring placement, submittal of a CSM with well search on neighboring properties, and PAH analysis in areas with highest suspected contamination. Delineation of soil contamination onto the property to north appears to be needed, and additional installation of groundwater monitoring wells may be necessary to delineate groundwater contamination.
|
Janice Wiegers |
| 1/24/2022 |
Document, Report, or Work plan Review - other |
BGES submitted a report titled Additional Site Characterization Activities, dated January 2022. Site work included installing 18 soil borings, three groundwater monitoring wells and one temproary well in January and April 2021. BGES reported that soil contamination remains above DEC's migration to groundwater cleanup levels but is below the human health levels, with the exception of arsenic which is likely naturally occurring. Groundwater contamination is delineated to the northwest but not in other direction. Groundwater flow direction was determined to be to the southwest in April. BGES recommends closure with institutional controls. |
Janice Wiegers |
| 4/4/2022 |
Document, Report, or Work plan Review - other |
DEC commented on the Additional Site Characterization Report and determined that additional delineation of soil and groundwater contamination, as well as additional groundwater monitoring to evaluate seasonal trends and to characterize the stability of contaminant plume, is needed. DEC requested clarification regarding the well search and soil delineation. |
Janice Wiegers |
| 7/11/2022 |
Document, Report, or Work plan Review - other |
Revisions to the Additional Site Characterization Report submitted, along with an amended workplan. |
Janice Wiegers |
| 1/23/2023 |
Meeting or Teleconference Held |
Responsible party and BGES met with DEC to discuss a path toward closing the site and potential property transactions. |
Janice Wiegers |
| 2/6/2023 |
Update or Other Action |
DEC sent letter regarding the site status to the responsible party. The letter indicates that additional groundwater delineation and monitoring is needed before DEC can evaluate closure. |
Janice Wiegers |
