| Action Date |
Action |
Description |
DEC Staff |
| 3/15/1993 |
Site Characterization Report Approved |
ADEC received the Remedial Action Report 250 Post Road Anchorage, submitted by Woodward-Clyde Consultants dated March 1993. The purpose of this investigation was to further remove remaining PCB contaminated soil, which was detected up to 180 mg/kg in the 1991 excavation confirmation samples. In August 1992, contaminated soil was removed to the best extent practicable and transferred to an approved disposal facility. Three out of 10 confirmation soil samples collected at least 1 foot below the groundwater interface contained PCBs at 1.63 mg/kg, 2.69 mg/kg, and 8.1 mg/kg. DRO up to 370 mg/kg was also detected. the excavation was backfilled with clean fill. (note: this is an historic report from the site known as: 2100.38.489 AMFAC Warehouse) |
Former Staff |
| 9/10/1999 |
Site Characterization Report Approved |
ADEC received the Baseline Environmental Site Assessment 200 & 250 Post Road submitted by S&W and dated September 1999. Five soil borings were advanced with three completed as temporary monitoring wells. Groundwater was encountered at depth of 6 to 12.5 feet bgs. Only a soil sample collected from boring B3 at a depth of 2.5 to 4 feet bgs contained TCE above cleanup levels at 0.978 mg/kg. Groundwater samples collected from temporary monitoring wells contained DRO up to 2.22 mg/L, RRO up to 5.66 mg/L, and select metals above cleanup levels. Note: the GW samples contained significant sediment content. When the samples were decanted and reanalyzed the contaminant concentrations were below cleanup levels for DRO and RRO. However, barium, chromium, and lead contained 4.92 mg/L, 0.133 mg/L, and 0.0483 mg/L above cleanup levels in boring B3W3 only. The location of the encountered contamination, Boring B3/B3W3, was advanced through the asphalt outside the west bay door of the 250 post road building. |
Former Staff |
| 9/27/1999 |
Site Characterization Report Approved |
ADEC received the TCE Contaminated Soil Assessment, 250 Post Road submitted by S&W and dated September 27, 1999. Five borings were advanced around former boring B3 that contained TCE contamination with one completed as a temporary MW. Groundwater was encountered at 12 feet bgs in the temporary MW. The groundwater sample and soil sample did not contain contaminant concentrations above clean level except for a boring located 30 feet southeast of former boring B3. A soil sample collected 3 to 5 feet bgs, from sand and gravel above the clay layer, contained TCE at 1.71 mg/kg. |
Former Staff |
| 9/29/1999 |
Site Characterization Report Approved |
ADEC received the Additional TCE Contaminated Soil Assessment, 250 Post Road submitted by S&W and dated September 29, 1999. Three additional borings were advanced to further delineate TCE soil contamination. All three borings contained TCE contamination above ADEC MTG cleanup levels. Soil samples collected from a depth of 3.5 to 7.9 feet bgs contained TCE at 0.0204 mg/kg, 0.0727 mg/kg, and 0.0913 mg/kg. Groundwater was encountered at 12 feet bgs in the temporary MW. The groundwater sample and soil sample did not contain contaminant concentrations above clean level except for a boring located 30 feet southeast of former boring B3. A soil sample collected 3 to 5 feet bgs, from sand and gravel above the clay layer, contained TCE at 1.71 mg/kg. |
Former Staff |
| 5/27/2003 |
Site Characterization Report Approved |
Conditional approval of work plan "Remedial Action Feasibility Study and Work Plan, 250 Post Road, Anchorage, Alaska". |
Eileen Olson |
| 7/15/2003 |
Site Characterization Report Approved |
ADEC received the Remedial Action Investigation, 250 Post Road submitted by S&W and dated July 2003. Five borings were advanced and completed as monitoring wells MW-1 to MW-5 to further delineate TCE groundwater and soil contamination. The initial location of MW-5 was abandoned due to speculation it was the location of a former septic crib based off sandy gravel and wood fragments from the boring emanating a sewage odor. MW-5 was therefore advanced 5 feet to the west. Only Soil samples collected from MW2 and MW3 contained TCE above cleanup levels. MW2 contained TCE at 0.74 mg/kg from a soil sample collected at 5-6.5 feet bgs and TCE at 0.44 from a soil sample collected at 10.0 to 11.5 feet bgs. A soil samples collected from MW-3 at a depth of 5 to 6.5 feet bgs contained TCE at 6.5 mg/kg. None of the monitoring wells contained TCE above cleanup levels, however, MW-3 contained TCE at 0.00486 mg/L. |
Grant Lidren |
| 9/14/2003 |
Update or Other Action |
Rec'd "Remedial Action Investigation, 250 Post Road, Anchorage, Alaska" dated July 2003. |
Eileen Olson |
| 9/22/2003 |
Update or Other Action |
Workplan for limited removal received this date. |
Eileen Olson |
| 10/7/2003 |
Cleanup Plan Approved |
Work Plan for Limited Soil Removal Action at 250 Post Road, Anchorage, Alaska” for the former Kelley-Moore Paint Company site (ADEC File No. CS57.15, formerly CS57.05). |
Eileen Olson |
| 10/9/2003 |
Site Added to Database |
TCE in soil and groundwater. |
Eileen Olson |
| 10/9/2003 |
Site Ranked Using the AHRM |
Initial ranking copied from AMFAC Warehouse site as characteristics are basically identical. |
Former Staff |
| 10/10/2003 |
Update or Other Action |
Re-ranked site: Changed toxicity to 4 from 2, changed quantity from 1 to 2, and changed groundwater exposure from unknown to 1. |
Eileen Olson |
| 6/29/2004 |
Update or Other Action |
Administrative order on consent (US EPA Docket No. CERCLA 10-2004-0065) signed to include ARRC terminal and designated leased properties. |
Linda Nuechterlein |
| 9/7/2005 |
Update or Other Action |
File number updated 2100.38.036 (combined file with AMFAC Warehouse). |
Aggie Blandford |
| 9/13/2005 |
Update or Other Action |
as part of the Administrative order on consent (US EPA Docket No. CERCLA 10-2004-0065 remedial investigation, a surface soil sample collected on this date west of the 250 Post Road Building contained PCBs at 7.97 mg/kg. |
Former Staff |
| 12/12/2005 |
Update or Other Action |
ADEC recevied the Site Characterization and Remedial Action Report by S&W for the former paint store (Kelly Moore) and warehouse located at 250 Post Road. The report documents site characterization and cleanup activities conducted 2003 to 2005.
Approximately 85 cy of TCE impacted soil was excavated to a depth of 7 feet bgs and ultimately transported to the MOA ARL for disposal. The sample results following the 2003 soil removal action indicate TCE contaminated soil remains on site. The highest TCE concentrations were detected in the interface area between fill material and the original surface soil. The highest TCE concentration remaining in the soil was measured at 7.78 mg/kg in a sample collected beneath the asphalt pad to the north of the excavation area at a depth of 5 feet bgs. The sample taken from the most southern location of the excavation had an analytical result of 0.659 mg/kg at a depth of 14 feet bgs. The 18 AAC 75.341 Table B1 migration to groundwater historic cleanup level for TCE was 0.027 mg/kg(cleanup level as of 2016 is 0.011 mg/kg).
Groundwater was encountered about 13 to 15 feet below ground surface (bgs) and is characterized by a clear transition from sandy gravel to silt-rich soils, at depths between 5 and 8 feet bgs. Six groundwater sampling events were conducted between May 2003 and May 2005. Groundwater flow direction is generally to the southwest with monitor wells MW-4; MW-3; and MW-6 consistently detecting TCE. The highest TCE concentration of 0.0142 mg/L, was measured in August 2003 from MW-3 and 0.0169 mg/L measured in May 2005 from MW-6.
|
Linda Nuechterlein |
| 12/30/2005 |
Update or Other Action |
A Petition for No Further Remedial Action Planned (NFRAP) dated December 5, 2005 was submitted by Shannon& Wilson (S&W) on behalf of the RP. Based on the information to date, ADEC has determined the site is not adequately characterized to make a decision regarding its environmental status. A letter dated 12/30/05 (which was sent to the RP) summarizes issues and identifies additional information needed to complete site characterization. |
Linda Nuechterlein |
| 6/21/2007 |
Update or Other Action |
Remedial Investigation Alaska Railroad Corporation Anchorage Terminal Reserve U.S. EPA Docket No. CERCLA 10-2004-0065, submitted by RETEC. The RI for Ship Creek identified groundwater Area 8, aka Kelly-Moore Paints as an area of concern for further evaluation in the feasibility study (2010 FS AECOM). Groundwater samples indicate TCE up to 0.0169 mg/L (S&W 2005) and vinyl chloride up to 0.0035 mg/L (2007 RI AECOM). Soil samples collected contained TCE up to 1.71 mg/kg (S&W 2003). The plume is confined to the lease property but has not reached Ship Creek, based on downgradient monitoring wells. TCE degradation products are present in downgradient.wells. Sampling of a suspected drinking water well at the site did not detect contaminants in the deeper aquifer. A vapor intrusion evaluation was conducted and found no risk to receptors at the site, However, TCE deep soil gas collected at 7ft. bgs contained 1397.3 ug/m^3 and TCE deep soil gas collected at 12 ft. bgs contained 4621.84 ug/m^3. This soil gas point was advanced 50 feet off the SW corner of the 250 Post Road building (2007 RI AECOM). For more information consult CS file # 2100.38.447 ARRC Anchorage Terminal Reserve
|
Grant Lidren |
| 2/27/2008 |
Exposure Tracking Model Ranking |
Initial ranking with ETM completed. |
Grant Lidren |
| 3/7/2016 |
Potentially Responsible Party/State Interest Letter |
ADEC sent a prp letter to Kelly-Moore Paint Company on this date. |
Grant Lidren |
| 11/18/2016 |
Site Characterization Workplan Approved |
The Alaska Department of Environmental Conservation (ADEC), Contaminated Sites Program (CSP) has reviewed the, “Work Plan to Conduct Additional Site Characterization Activities, 250 Post Road, Anchorage, Alaska” dated November 16, 2016 submitted by Shannon & Wilson. ADEC has no objections to the work plan and Shannon & Wilson may proceed. |
Grant Lidren |
| 12/15/2016 |
Site Visit |
On this date, ADEC visited the site during groundwater sampling conducted by Shannon & Wilson. |
Grant Lidren |
| 1/5/2017 |
Offsite Soil or Groundwater Disposal Approved |
On this date, ADEC approved the disposal of a 55-gallon drum of VOC impacted water to NRC. This IDW was the result of groundwater sampling in December 2016. |
Chelsy Passmore |
| 5/8/2017 |
Site Characterization Report Approved |
On this date, ADEC received the Additional Site Characterization 250 Post Road submitted by Shannon & Wilson dated May 2017. The onsite drinking water well, the four monitoring wells MW-1, MW-4, MW-5, MW-6 and two soil gas points SGP1 and SGP2 were advanced and sampled. Additionally, the onsite floor drain was evaluated. Reportedly, the floor drain is connected to a septic tank with no leach field that is pumped when full. The septic tank is located on the south side of the building. The drinking water sample from the onsite DWW did not contain detectable levels of VOCs. This DWW is reportedly only used for daily sanitary purposes and not drinking. Drinking water at this site is supplied by AWWU. Only monitoring wells MW-4 and MW-6, both located downgradient, contained contaminant concentrations above cleanup levels with TCE up to 18.3 ug/L, 1,2,4-trichlorobenzene up to 16.7 ug/L, and 1,4-dichlorobenzene up to 19.6 ug/L. Groundwater was measured at depth of 6.5 to 6.92 feet bgs at MW-1 and MW-5 and was measured at depths of 13.5 to 13.69 feet bgs at MW-4 and MW-6 flowing south-southwest. The soil gas probes, sampled at a depth of 4.0 to 4.5 feet bgs did not contain contaminant concentrations above ADEC target levels. |
Grant Lidren |
| 8/2/2017 |
Update or Other Action |
On this date, ADEC receved the Geotechnical Engineering Report ARRC Sewer Line Extension – Phase IV submitted by Shannon & Wilson dated December 2016. Five soil borings were advanced to a depth of 20 feet bgs. The borings were placed linearly north to south just outside the east property line of ARRC Mammoth Alaska and north of this site (250 Post Road). Groundwater was encountered 7.0 and 13.2 feet bgs. Five soil samples were collected from four borings B1, B2, B3, and B4. One soil sample collected from each B1, B2, and B3 location highest pid reading 0.2 to 2 feet bgs contained TCE up to 0.189 mg/kg. Soil samples collected from B4 at the ground water interface contained 1,2-dichlorothane up to 0.0150 mg/kg, TCE up to 0.0255 mg/kg, and vinyl chloride up to 0.0117 mg/kg. |
Grant Lidren |
| 9/20/2017 |
Site Characterization Workplan Approved |
On this date, ADEC approved the Revised Work Plan to Conduct Additional Site Characterization Activities, 250 North Post Road submitted by Shannon and Wilson dated September 12, 2017. Work is planned for May 2018. |
Grant Lidren |
| 11/15/2018 |
Site Characterization Workplan Approved |
On this date, ADEC received the 2018 Additional Site Characterization, 250 Post Road submitted by S&W and dated November 15, 2018. Soil gas samples were collected from existing soil gas points and ground water samples were collected from the four existing MWs. Additionally, four soil borings were advanced and two were completed as new monitoring wells MW-8 and MW-9 with soil and groundwater samples collected to evaluate lateral extent of TCE contamination. MW-8 was located southwest of the source area and MW-9 was advanced east of the source area. Only one of the four borings located within the source area (B15) contained TCE concentrations above method two cleanup levels with TCE at 0.128 mg/kg at 5 to 6.6 feet bgs and up to 0.127 mg/kg at 12 to 13 feet bgs. Only one of the soil gas points was intact to sample. It contained soil gas concentrations below ADEC target levels. Only the historical contaminated monitoring wells MW-4 and MW-6 contained groundwater contamination above cleanup levels. MW-4 contained 1,2,4- trichlorobenzene up to 9.28 ug/L and 1,4-dichlorobenzene up to 9.40 ug/L. MW-6 contained TCE up to 18.7 ug/L. Groundwater flow was toward the southwest. |
Grant Lidren |
| 11/15/2018 |
Site Characterization Workplan Approved |
On this date, ADEC approved the November 2018 groundwater monitoring event as long as it is conducted in accordance with the September 12, 2017 work plan. |
Grant Lidren |
| 2/1/2019 |
Site Characterization Report Approved |
On this date, ADEC received the November 2018 Groundwater Monitoring Event, 250 Post Road submitted by S&W and dated January 2019. Groundwater samples were collected from MW-1, MW-4, MW-5, MW-6, MW-8, and MW-9 and analyzed for VOCs. Only the historical contaminated monitoring wells MW-4 and MW-6 contained groundwater contamination above cleanup levels. MW-4 contained 1,2,4- trichlorobenzene at 6.95 ug/L and 1,4-dichlorobenzene at 4.95 ug/L. MW-6 contained TCE up to 21.7 ug/L. Groundwater flow was toward the southwest. |
Grant Lidren |
| 2/20/2019 |
Site Characterization Report Approved |
On this date, ADEC reviewed and approved the Work Plan for 2019 Semi-annual Groundwater Monitoring 250 Post Road submitted by Shannon & Wilson, dated February 20, 2019. |
Grant Lidren |
| 7/24/2019 |
Site Characterization Report Approved |
On this date, ADEC received the June 2019 Groundwater Monitoring Event, 250 Post Road submitted by S&W and dated July 2019. Groundwater samples were collected from MW-1, MW-4, MW-5, MW-6, MW-8, and MW-9 and analyzed for VOCs. Only the historical contaminated monitoring wells MW-4 and MW-6 contained groundwater contamination above cleanup levels. MW-4 contained 1,2,4- trichlorobenzene at 9.83 ug/L and 1,4-dichlorobenzene at 8.14 ug/L. MW-6 contained 1,2,4- trichlorobenzene up to 8.26 ug/L, 1,4-dichlorobenzene up to 7.90 ug/L and trichloroethylene (TCE) up to 11.3 ug/L. Groundwater flow was toward the southwest. |
Grant Lidren |
| 7/24/2019 |
Site Characterization Workplan Approved |
The Groundwater will be monitored again November 2019. |
Grant Lidren |
| 12/6/2019 |
Site Characterization Report Approved |
On this date, ADEC received the October 2019 Groundwater Monitoring Event, 250 Post Road submitted by S&W and dated December 2019. Groundwater samples were collected from MW-1, MW-4, MW-5, MW-6, MW-8, and MW-9 and analyzed for VOCs. Only the historical contaminated monitoring wells MW-4 and MW-6 contained groundwater contamination above cleanup levels. MW-4 contained 1,2,4- trichlorobenzene at 4.58 ug/L. MW-6 contained 1,2,4- trichlorobenzene up to 5.73 ug/L, and trichloroethylene (TCE) up to 13.9 ug/L. Groundwater flow was toward the southwest. |
Grant Lidren |
| 12/17/2019 |
Site Characterization Workplan Approved |
On this date, ADEC approved the 2020 GW sampling plan submitted by S&W. Monitoring wells MW-4 and MW-6 will be sampled and analyzed by 8260 in accordance with the ADEC-approved February 20, 2019 S&W work plan. The groundwater will be sampled in spring and fall 2020. |
Grant Lidren |
| 8/11/2020 |
Site Characterization Report Approved |
On this date, ADEC received the June 2020 Groundwater Monitoring Event, 250 Post Road submitted by S&W and dated August 2020. Groundwater samples were collected from MW-4 and MW-6 and analyzed for VOCs. MW-4 contained 1,2,4- trichlorobenzene at 15.9 ug/L and 1,4-dichlorobezene up to 10.9 ug/L. MW-6 contained 1,2,4- trichlorobenzene up to 9.43 ug/L, 1,4-dichlorobenzene up to7.24 ug/L, and trichloroethylene (TCE) up to 12.4 ug/L. MW-4 and MW-6 will be sampled again October 2020. |
Grant Lidren |
| 10/1/2020 |
Update or Other Action |
Shannon & Wilson plans to sample the GW on October 7 & 8 2020. |
Grant Lidren |
| 10/30/2020 |
Offsite Soil or Groundwater Disposal Approved |
DEC approved transport of 10 gallons of purge water from groundwater monitoring to U.S. Ecology's Viking Facility. COCs include TCE, 1,4-dichlorobenzene, and 1,2,4-trichlorobenzene. This form was resubmitted in November 2020 due to a change in the final disposition of the waste. |
Janice Wiegers |
| 11/24/2020 |
Offsite Soil or Groundwater Disposal Approved |
DEC signed off-site transport approval for ~10 gallons of purge water. The water will be disposed of at US Ecology's landfill site in Grandview Idaho. |
Janice Wiegers |
| 12/17/2020 |
Document, Report, or Work plan Review - other |
On this date, ADEC received the 2020 Groundwater Monitoring Report for the Kelly-Moore Paint Store & Warehouse site (ADEC File 2100.38.036) located at 250 Post Road Anchorage, Alaska dated December 2020.
The report describes groundwater sample collection field activities at two groundwater monitoring wells on October 7, 2020. Groundwater monitoring wells MW-4 and MW-6 were sampled for volatile organic compounds (VOCs). Contaminant exceedances above the 18 AAC 75.345 Table C Groundwater Cleanup Levels were detected at both monitoring wells during this sampling event. Trichloroethylene (TCE), 1,2,4-Trichlorobenzene (TCB), and 1,4-Dichlorobenzene (DCB) were detected above cleanup levels at MW-6 and TCB was detected above cleanup levels at MW-4. At this time, this site is not eligible for closure. Contaminant concentrations remain above the 18 AAC 75.345 Table C Groundwater Cleanup Levels. ADEC recommends continuing annual groundwater monitoring at this site to demonstrate decreasing contaminant concentrations of VOCs at MW-4 and MW-6. |
Brandi Tolsma |
| 6/7/2021 |
Site Characterization Workplan Approved |
On this date, ADEC approved the proposal to conduct an annual groundwater monitoring event on June 23, 2021 at the 250 Post Road property that will entail purging and sampling of Monitoring Wells MW-4 and MW-6. The proposed work is approved in accordance with the ADEC-approved February 20, 2019 work plan. |
Brandi Tolsma |
| 7/22/2021 |
Offsite Soil or Groundwater Disposal Approved |
On this date, ADEC approved the disposal of a 10 gallons of VOC impacted water to NRC. This IDW was the result of groundwater sampling in June 2021. |
Brandi Tolsma |
| 8/26/2021 |
Document, Report, or Work plan Review - other |
On this date, ADEC received the 2020 Groundwater Monitoring Report for the Kelly-Moore Paint Store & Warehouse site (ADEC File 2100.38.036) located at 250 Post Road Anchorage, Alaska dated August 2021. The report describes groundwater sample collection field activities at two groundwater monitoring wells on June 23, 2021. Groundwater monitoring wells MW-4 and MW-6 were sampled for volatile organic compounds (VOCs). Contaminant exceedances above the 18 AAC 75.345 Table C Groundwater Cleanup Levels were detected at both monitoring wells during this sampling event. Trichloroethylene (TCE), 1,2,4-Trichlorobenzene (TCB), and 1,4-Dichlorobenzene (DCB) were detected above cleanup levels at MW-6. TCB and DCB were detected above cleanup levels at MW-4. ADEC agrees with the recommendation to continue annual groundwater monitoring at this site to demonstrate decreasing contaminant concentrations of VOCs at MW-4 and MW-6. |
Brandi Tolsma |
| 5/19/2022 |
Document, Report, or Work plan Review - other |
On this date, ADEC approved the proposal to conduct an annual groundwater monitoring event on June 16, 2022 at the 250 Post Road property that will entail purging and sampling of Monitoring Wells MW-4 and MW-6. The proposed work is approved in accordance with the ADEC-approved February 20, 2019 work plan. |
Brandi Tolsma |
| 10/23/2023 |
Exposure Tracking Model Ranking |
A new updated ranking with ETM has been completed for source area 74143 TCE & PCB Contamination. |
Kelly Ireland |
