| Action Date |
Action |
Description |
DEC Staff |
| 10/22/2018 |
Site Added to Database |
A new site has been added to the database |
Mitzi Read |
| 10/23/2018 |
Document, Report, or Work plan Review - other |
On March 2011 soil and water sampling conducted during a Phase II assessment identified trichloroethene (TCE) contamination (0.210 mg/kg) at the soil/water interface above cleanup levels. A soil/water interface soil sample and a groundwater sample were collected from two soil borings. After collecting one groundwater sample the two temporary monitoring wells were decommissioned. The soil samples collected had up to 0.210 mg/kg TCE, 0.213 mg/kg gasoline range organics (GRO), 10.5 mg/kg diesel range organics (DRO), 12.1 mg/kg residual range organics (RRO), and 0.0144 mg/kg carbon tetrachloride. The water samples collected had 0.476 mg/l DRO, 0.442 mg/l RRO, and non-detect for GRO and volatile organic compounds. The sampling was conducted to help assess whether the leaking underground storage tank site (Hazard ID 23804 / file number 2100.26.129) on their property to the west (2501 East 5th Avenue) was impacting this property (2601 East 5th Avenue). The nature and extent of the TCE contamination identified in 2011 needs to be defined. |
Robert Weimer |
| 12/6/2018 |
Document, Report, or Work plan Review - other |
DEC approves work plan to sample three soil borings and complete them as long-term monitoring wells to help define the extent of the trichloroethene (TCE) contamination identified in the soil near the soil/water interface during a Phase II assessment in 2011. The work plan proposes collecting two soil samples from each boring and to collect a groundwater sample from each monitoring well. The soil and groundwater samples are to be analyzed for VOCs. |
Robert Weimer |
| 3/19/2019 |
Document, Report, or Work plan Review - other |
In December 18, 2018 three soil borings were sampled and completed as monitoring wells (MW1,MW2, and MW3). The soil samples collected had up to 0.0073 mg/kg benzene, 0.0018 mg/kg toluene, 0.0034 mg/kg ethylbenzene, 0.0164 mg/kg methylene chloride, 0.00675 mg/kg chloroform, 0.0074 mg/kg carbon tetrachloride, 0.0092 mg/kg 1,2,4-trimethylbenzne, 0.0042 mg/kg 1,3,5-trimethylbenzene, 0.0174 mg/kg acetone, 0.0012 mg/kg chloromethane, 0.0012 mg/kg naphthalene, 0.0034 mg/kg n-Butylbenzene, 0.00041 mg/kg sec-butylbenzene, and 0.0042 mg/kg trichloroethene.
On December 26, 2018 the three site monitoring wells were sampled within the top foot of the water column with a bladder pump after purging. The monitoring wells had up to 3.5 ug/l carbon tetrachloride, 1.0 ug/l chloroform, and 13.5 ug/l trichloroethene. Groundwater flow direction was toward the northwest. Depth to groundwater ranged between 38.56 to 38.99 feet below ground surface. |
Robert Weimer |
| 6/3/2019 |
Update or Other Action |
ADEC receives notification that they plan to sample the groundwater on June 5-6, 2019. |
Robert Weimer |
| 10/3/2019 |
Document, Report, or Work plan Review - other |
ADEC approves work plan to install 3 additional monitoring wells to help define the extent of the soil and groundwater contamination at this site. |
Robert Weimer |
| 3/5/2020 |
Document, Report, or Work plan Review - other |
On November 5-6, 2019 three soil borings were sampled and they were completed as long-term monitoring wells (MW4, MW5, and MW6). The soil samples collected had up to 0.0435 mg/kg toluene, 0.00675 mg/kg chloroform, 0.0186 mg/kg carbon tetrachloride, and 0.0335 mg/kg trichloroethene.
On November 13, 2019 the six site monitoring wells were sampled within the top foot of the water column with a bladder pump after purging. The monitoring wells had up to 216 ug/l DRO, 4.55 ug/l carbon tetrachloride, 1.36 ug/l chloroform, and 15.3 ug/l trichloroethene. The concentrations increase in monitoring wells MW1, MW2, and MW3 that had been previously sampled in 2018.
16 drums of drill cuttings and 4 drums of purge water are currently stored on-site. Groundwater flow direction was toward the northwest. Depth to groundwater ranged between 36.00 to 38.79 feet below ground surface. A light sheen was noted on the groundwater in monitoring well MW6. |
Robert Weimer |
| 4/20/2020 |
Update or Other Action |
Sent letter to RP requesting a Release Investigation be conducted to investigate source of TCE in soils and groundwater, including an inspection of floor drains or UIC inside the dealership building. Also concurred with consultants recommendation to monitor contaminants in groundwater from existing monitoring wells. |
Jim Fish |
| 5/8/2020 |
Update or Other Action |
Received a response from RP to DEC Request for release investigation & continued groundwater monitoring. RP requested release investigation be waived. DEC sent response letter acknowledging difficulty COVID-19 pandemic has created for businesses and agreed that a full release investigation could be delayed until later, but that some inspection and/or building survey proceed to understand shop wastewater infrastructure and if further evaluation is warranted. A Fact Sheet on short-term and long-term health risks of TCE exposure were also sent to the RP. |
Jim Fish |
| 6/11/2021 |
Potentially Responsible Party/State Interest Letter |
The ADEC sent a potential responsible party letter to Anchorage Chrysler, Inc. on June 11, 2021. |
Randy Guintu |
| 6/22/2021 |
Site Characterization Workplan Approved |
The ADEC approved the indoor air sampling work plan prepared by BGES, Inc on June 22, 2021. |
Randy Guintu |
| 10/4/2021 |
Document, Report, or Work plan Review - other |
The ADEC received a work plan modification request from the RP's consultant, BGES. Based on the first round of indoor ambient air sampling, the work plan modification proposes to install additional indoor/outdoor ambient air sampling near the NE storage closet. Semi-permanent sub-slab soil samples are also proposed in the same vicinity. The storage closet exhibited TCE concentrations of 8.3 micrograms/ meters cubed, in exceedance of ADEC's cleanup level of 2.2 micrograms/ meters cubed for a commercial facility. The ADEC is reviewing the modification request. |
Flannery Ballard |
| 10/22/2021 |
Update or Other Action |
The ADEC issued a comment letter asking the RP to clarify whether vulnerable populations have been contacted regarding the TCE contamination, whether bathroom facilities are being considered as vapor entry points, and whether a pressure differential evaluation is being considered for the next vapor intrusion sampling event. |
Flannery Ballard |
| 10/29/2021 |
Exposure Tracking Model Ranking |
Initial ranking with ETM completed for source area id: 80303 name: TCE Contamination |
Courtney Pegus |
| 1/13/2022 |
Update or Other Action |
The ADEC approved the following changes to the vapor intrusion characterization work plan: the use of Teflon tubing instead of stainless steel, and an extension of the submittal deadline to March 31, 2022. |
Flannery Ballard |
| 9/2/2022 |
Document, Report, or Work plan Review - other |
The ADEC issued a comment letter for the "Anchorage Chrysler Dodge 2601 E 5th Avenue Anchorage, Alaska - Vapor Intrusion Assessment Report (2021-2022)". The ADEC is requesting an updated report be resubmitted.
|
Alena Voigt |
| 9/16/2022 |
Document, Report, or Work plan Review - other |
DEC approved the "Anchorage Chrysler Dodge 2601 E 5th Avenue Anchorage, Alaska - Vapor Intrusion Assessment Report (2021-2022)" report. |
Alena Voigt |
| 2/9/2023 |
Meeting or Teleconference Held |
Meeting at Anchorage Chrysler Dodge Center with stakeholders to discuss previous site characterization reports, recommendation from environmental consultant and a path forward to site closure. |
Alena Voigt |
| 4/12/2023 |
Site Characterization Workplan Approved |
DEC approved the "Work Plan Addendum Number 2 – Additional Site Characterization and Vapor Intrusion Activates" work plan, dated April 4, 2023. The work plan states that soil, groundwater, indoor air, and soil gas sampling activities will be performed in accordance with previous ADEC-approved work plans, work plan addendums, and modifications |
Alena Voigt |
| 6/10/2024 |
Site Characterization Report Approved |
CSP reviewed "2023 Site Characterization Activities Report”. The report documents activities that included advancement of two soil borings (SB07 and SB08), installing two groundwater monitoring wells (MW07 and MW08), collecting and analyzing soil and groundwater samples, surveying all monitoring well locations, collecting and analyzing indoor air samples and sub-slab soil samples. Groundwater Samples MW01, MW02, MW03, MW08 contained TCE concentrations that ranged from 4.7 micrograms per liter (µg/L) to 17 µg/L, above ADEC cleanup criterion of 2.8 µg/L. CSP is requesting a work plan for additional site characterization be submitted for review. Report is attached. |
Alena Voigt |
| 7/12/2024 |
Meeting or Teleconference Held |
Meeting at Anchorage DEC with stakeholders, EPM1 and EPM2 to discuss a path towards closure. |
Alena Voigt |
| 10/2/2024 |
Meeting or Teleconference Held |
Teleconference with BGES, EPM2, and PM to discuss a path towards closure. |
Alena Voigt |
| 10/3/2024 |
Site Characterization Workplan Approved |
The CSP reviewed "Work Plan Addendum Number 3". One soil boring will be advanced SE of the building, soil samples will be collected and analyzes for VOCs. The boring will be completed into a monitoring well (MW-9). MW-8 and MW-9 will be sampled for VOCs. |
Alena Voigt |
| 6/2/2025 |
Site Visit |
Site Visit on June 2, 2025. |
Alena Voigt |
