| Action Date |
Action |
Description |
DEC Staff |
| 5/21/2015 |
Document, Report, or Work plan Review - other |
On this date, ADEC received the Environmental Investigation, Modeling and Pipe Recommendations for the ARRC Anchorage Terminal Reserve Waterline Rehabilitation Project, submitted by RSE and dated December 2014. As part of this investigation, seven boreholes (TB1 to TB7) were completed as temporary MWs adjacent to the Fueling Rack area. Only TB4 contained soil contamination above cleanup levels. Soil samples collected at the GW interface at 12.5 feet bgs contained TCE at 0.0384 mg/kg and PCE at 0.0485 mg/kg. Only two temporary wells contained contamination above cleanup levels. Groundwater samples collected from TB4 and TB5 contained DRO and RRO up to 3.40 mg/L and 8.06 mg/L respectively. For more information consult CS file # 2100.38.039 ARRC Fueling Rack. |
Grant Lidren |
| 5/26/2015 |
Document, Report, or Work plan Review - other |
On this date, ADEC received the AWWU PN 6526 - ARRC Yard Rehabilitation Water Phase 1: Work Plan for Potentially Contaminated Soil and Groundwater Management. For more information consult CS file # 2100.38.039 ARRC Fueling Rack. |
Grant Lidren |
| 7/31/2015 |
Update or Other Action |
Contaminated water was encountered from an unknown corrugated metal pipe (CMP) 8 feet bgs damaged during excavation work. CMP discharge water and soil samples were collected from the CMP excavation bottom. The soil contained detectable concentrations of contaminants but below cleanup levels. Grab samples collected from the CMP discharge water contained DRO at 7.21 mg/L and RRO at 9.02 mg/L. |
Grant Lidren |
| 8/10/2015 |
Update or Other Action |
On this date, the damaged CMP was capped and the excavation was back filled with SP1. |
Grant Lidren |
| 8/12/2015 |
Document, Report, or Work plan Review - other |
On this date, ADEC received the Work Plan for ARRC Railroad Avenue Sewer Line Extension field-screening and characterization sampling (Revision 2). |
Grant Lidren |
| 8/26/2015 |
Document, Report, or Work plan Review - other |
On this date, ADEC received the Soil Stockpile Characterization and Disposal Request: ARRC Railroad Avenue Sewer Line Extension submitted by RSE and dated 8/26/15. Characteristic soil samples were collected from stockpile 2 and 3. Five soil samples collected from the 250cy SP2 contained PCBs up to 1.92 mg/kg and PCE up to 0.123 mg/kg.One soil sample collected the 45 cy SP3 did not contain contaminant concentrations above method two most stringent cleanup levels. |
Grant Lidren |
| 9/12/2015 |
Document, Report, or Work plan Review - other |
On this date, ADEC received the Soil Screening, Segregation, and Confirmation Sampling at the AS&G Sand Lake Clean Fill Pit - Corrective Actions Report (Revision 1), Anchorage, Alaska. ADEC Enforcement Case No. 2015-C0006 submitted by RSE. A total of 314.15 tons of soil was excavated. Nine confirmation footprint soil samples collected contained detectable concentrations of contaminants, but below ADEC most stringent cleanup levels. |
Grant Lidren |
| 9/17/2015 |
Document, Report, or Work plan Review - other |
On this date, ADEC received the Soil Stockpile Characterization Data: ARRC Railroad Avenue Sewer Line Extension Anchorage Terminal Reserve. Soil samples collected from SP4 and SP5 were below ADEC most stringent cleanup levels. The soil was transported to the CEI Birchwood monofill. |
Grant Lidren |
| 10/14/2015 |
Document, Report, or Work plan Review - other |
On this date, ADEC received the Stockpile 6 re-sampling event and characterization: ARRC Railroad Avenue Sewer Line Extension Anchorage Terminal Reserve submitted by RSE. Soil samples collected from SP6 contained DRO up to 369 mg/kg which is above the method two migration to groundwater (MTG) cleanup level and detectable levels of RRO, VOCS, PCBs, and PAHs, below the method two MTG soil cleanup levels. This soil was transported to 801 West 1st Avenue and landspread in the parking lot. |
Grant Lidren |
| 10/14/2015 |
Site Added to Database |
A new site has been added to the database |
Mitzi Read |
| 10/23/2015 |
Potentially Responsible Party/State Interest Letter |
On this date, ADEC sent a PRP letter to ARRC. |
Grant Lidren |
| 11/6/2015 |
Document, Report, or Work plan Review - other |
On this date, ADEC received the Stockpile 8 characterization Data: ARRC Railroad Avenue Sewer Line Extension Anchorage Terminal Reserve submitted by RSE. Soil samples collected from SP8 contained detectable levels of GRO, DRO, RRO, VOCS, PCBs, and PAHs, below the method two MTG soil cleanup levels. This soil was transported to 801 West 1st Avenue and landspread in the parking lot. |
Grant Lidren |
| 12/1/2015 |
Update or Other Action |
On this date, ADEC received the Additional Soil Stockpile Segregation and Characterization: ARRC Railroad Avenue Sewer Line Extension, Anchorage Terminal Reserve, ADEC File No. 2100.38.447. This report pertains to PCB waste characterization for SP2. The north side of the SP2 pile, based off previous analytical data, contained PCBs up to 1.92 mg/kg. The Anchorage Regional Landfill (ARL) acceptance limit is 1 mg/kg. Therefore, an attempt was made to segregate PCB contaminated soil above 1 mg/kg from the north side of the pile to be disposed at the Columbia Ridge Landfill in Arlington Oregon and PCB contaminated soil below 1 mg/kg disposed at the ARL. Nine cubic yards of PCB contaminated soil from north side of the pile was segregated into supersack bags. Two confirmation samples collected from the exposed stockpile face contained PCBs up to 3.1 mg/kg. Based off these results, an additional 7 cubic yards of PCB contaminated soil from north side of the pile was segregated into supersack bags. Two confirmation samples collected from the exposed stockpile face contained PCBs up to 24.7 mg/kg. The stockpile and the supersack bags remain onsite. |
Grant Lidren |
| 12/8/2015 |
Document, Report, or Work plan Review - other |
The Alaska Department of Environmental Conservation (ADEC) Contaminated Sites Program (CSP) has received and reviewed the Additional Soil Stockpile Segregation and Characterization: ARRC Railroad Avenue Sewer Line Extension, Anchorage Terminal Reserve, ADEC File No. 2100.38.447 submitted by RSE and dated December 7, 2015. ADEC has no objections to the Work Plan with the following requirements:
• ARRC must contact ADEC when the appropriate liner thickness is selected for either 10 mil for short term storage of soil (180 days or less) or 20 mil for long term storage (180 days to 2 years)
• ADEC must approve offsite soil transport in accordance with (18 AAC 75.325 (i) (1))
|
Grant Lidren |
| 1/13/2016 |
Site Characterization Report Approved |
On this date, ADEC received the Soil Stockpile 7 (SP7) Characterization Data: ARRC Railroad Avenue Sewer Line Extension Anchorage Terminal Reserve submitted by RSE dated October 22, 2015. Five soil samples collected from the 700 cy stockpile did not contain contaminant concentrations above ADEC cleanup levels. |
Grant Lidren |
| 3/11/2016 |
Update or Other Action |
An email from ARRC on this date states "Stockpile 3 (SP3) was reutilized back into the excavation behind Guardian Security." PCB contaminated SP2 will be transported to an approved facility in Oregon. SP7 will be transported along bluff and land spread. |
Grant Lidren |
| 4/5/2016 |
Document, Report, or Work plan Review - other |
The Alaska Department of Environmental Conservation (ADEC) Contaminated Sites Program (CSP) has received and reviewed the Contaminated Soil and Groundwater Work Plan 2015 Water Improvements ARRC Yard Water Upgrade Project Phase 1 submitted by Midnight Sun Environmental and dated April 5th 2016. The CSP has no objections to the Work Plan and Midnight Sun Environmental may proceed pending the following comment: excavation dewatering is regulated by the ADEC Division of Water (DOW), Wastewater Discharge Authorization Program. DOW must be coordinated with prior to field work. |
Grant Lidren |
| 5/12/2016 |
Offsite Soil or Groundwater Disposal Approved |
On this date, ADEC approved the transport of SP7 to the bluff on the north side of the rail yard. |
Grant Lidren |
| 6/7/2016 |
Update or Other Action |
On this date, ADEC received the ARRC Yard Water Upgrades Project Stockpile Area A Footprint Sampling Report dated May 12, 2016 submitted by Midnight Sun. Eleven footprint samples did not contain contaminant concentrations above ADEC most stringent cleanup levels. Note: this is part of the Phase I AWWU waterline upgrade work conducted during summer 2016. |
Grant Lidren |
| 6/8/2016 |
Update or Other Action |
On this date ADEC approved the transport of 160 CY of TCE, PCE, and DRO contaminated soil from the Interim Stockpile Area (originally excavated from STA 31+20 to 31+50 and STA 30+70 to 31+00) to Stockpile Area B. ARRC is responsible for the future haul to treatment and disposal facilities in accordance with DEC regs from Stockpile Area B. Additionally, ADEC approved the transport of 20 CY of soil with contaminant concentrations below ADEC most stringent cleanup levels from the Interim Stockpile Area (originally excavated from STA 10+00) to Stockpile Area A. This soil will be spread and left in place.
|
Grant Lidren |
| 6/21/2016 |
Update or Other Action |
On this date ADEC approved the transport of uncontaminated soil from the Interim Stockpile Area (originally excavated from STA 10+28 east to 10+48, STA 40+79 north to 40+44, and STA 40+79) to Stockpile Area A. This soil will be spread and left in place. |
Grant Lidren |
| 6/30/2016 |
Update or Other Action |
On this date, ADEC approved the transport of uncontaminated soil from STA 43+00 to 44+00 and STA 40+00 to 40+75 to Stockpile Area A. This soil will be spread and left in place. |
Grant Lidren |
| 7/6/2016 |
Update or Other Action |
On this date, ADEC approved the transport of 40 cy of uncontaminated soil from STA 30 +50 to STA 10+05 to Stockpile Area A. This soil will be spread and left in place. |
Grant Lidren |
| 7/11/2016 |
Update or Other Action |
On this date, ADEC approved the transport of 40 cy of uncontaminated Drilling Mud Slurry from STA 22+00 to STA 25+20 to Stockpile Area A. This soil will be spread and left in place. |
Grant Lidren |
| 7/11/2016 |
Offsite Soil or Groundwater Disposal Approved |
Contaminated soils from STA 31+20 to STA 31+50 (located in interim stockpile area), STA 30+70 to STA 31+00 (located in interim stockpile area), STA 41+98 to STA 42+98 (located in interim stockpile area), and STA 44+00 to STA 44+75 (located at ~ STA 43+50 to STA 44+00) were approved for transport to the Anchorage Regional Landfill. |
Grant Lidren |
| 7/12/2016 |
Offsite Soil or Groundwater Disposal Approved |
160 CY of Contaminated soils from STA 30+50 to STA 10+50 (located at STA 30+50) were approved for transport to the Anchorage Regional Landfill. |
Grant Lidren |
| 7/13/2016 |
Update or Other Action |
On this date, ADEC approved the transport of uncontaminated soil from STA 44+00 to 44+75 to Stockpile Area A. This soil will be spread and left in place. |
Grant Lidren |
| 7/14/2016 |
Update or Other Action |
On this date, ADEC approved the transport of 165 cy of uncontaminated soil from STA 22+00 to 22+24 and 11+00 to 11+75. This soil was transported to Stockpile Area A. This soil will be spread and left in place. |
Grant Lidren |
| 7/15/2016 |
Update or Other Action |
On this date, ADEC approved the transport of 45 cy of uncontaminated drilling mud slurry from STA 17+37 to STA 21+98 to Stockpile Area A. This soil will be spread and left in place. However, there is another 60 cy of drilling mud slurry from 17+37 to 21+98 which has yet to be characterized. |
Grant Lidren |
| 7/21/2016 |
Update or Other Action |
On this date, ADEC approved the transport of 81 cy of uncontaminated drilling mud slurry from STA 17+37 to STA 21+98 to Stockpile Area A. This soil will be spread and left in place. |
Grant Lidren |
| 7/26/2016 |
Offsite Soil or Groundwater Disposal Approved |
On this date, ADEC approved the transport of all the PCB contaminated soil from SP2(from the 2015 Post and Sitka Rd sewer line upgrades) to the Columbia Ridge landfill in Oregon. Fourteen soil samples collected from this stockpile on 12/15/15 contained PCBs between 0.932 mg/kg and 30.9 mg/kg. transport is planned during the week of 8/1/16. Four confirmation soil samples collected from underneath the stockpile from the footprint did not contain detectable levels of PCBs. |
Grant Lidren |
| 7/27/2016 |
Update or Other Action |
On this date, ADEC approved the transport of 123 cy of uncontaminated soil from the northern side of the ARRC Diesel Repair Shop (from STA 25+20 to STA 25+60) to Stockpile Area A. This soil will be spread and left in place. |
Grant Lidren |
| 7/27/2016 |
Offsite Soil or Groundwater Disposal Approved |
53 CY of Contaminated soils from STA 17+40 approved for transport to the Anchorage Regional Landfill. |
Grant Lidren |
| 7/28/2016 |
Update or Other Action |
On this date, ADEC approved the transport of 337 cy of uncontaminated soil from the northwest side of the ARRC Diesel Repair Shop (from STA 22+00 to STA 22+20) to Stockpile Area A. This soil will be spread and left in place. |
Grant Lidren |
| 8/5/2016 |
Offsite Soil or Groundwater Disposal Approved |
On this date, ADEC approved the transport of 100 cy of contaminated drilling mud slurry to ASR. Also, 35 CY, of uncontaminated drilling slurry was transported to stockpile area A to be spread and left in place. |
Grant Lidren |
| 8/8/2016 |
Update or Other Action |
On this date, ADEC approved the transport of 217 cy of uncontaminated soil from STA 11+55 to STA 11+85 and STA 15+80 to 16+00 to stockpile area A. This soil will be spread and left in place. |
Grant Lidren |
| 8/12/2016 |
Offsite Soil or Groundwater Disposal Approved |
Columbia Ridge Landfill in Oregon received 408.23 tons of nonhazardous PCB contaminated soil (SP2)August 12, 2016 through October 12, 2016 |
Grant Lidren |
| 8/16/2016 |
Offsite Soil or Groundwater Disposal Approved |
On this date, 42 CY of Contaminated soils from STA 16+00 to 16+40 approved for transport to the Anchorage Regional Landfill. |
Kevin Gardner |
| 8/22/2016 |
Update or Other Action |
On this date, ADEC approved the transport of 900 cy of uncontaminated soil from STA 16+24 to stockpile area A. This soil will be spread and left in place. |
Kevin Gardner |
| 8/25/2016 |
Update or Other Action |
On this date, ADEC approved the transport of 140 cy of uncontaminated soil from STA 16+40 to STA 17+00 and STA 15+10 to 15+30 to stockpile area A. This soil will be spread and left in place. |
Grant Lidren |
| 9/12/2016 |
Offsite Soil or Groundwater Disposal Approved |
On this date, 10.5 CY of Contaminated sediment from a rain for rent tank was approved for transport to the Anchorage Regional Landfill. |
Grant Lidren |
| 10/31/2016 |
Update or Other Action |
On this date, ADEC approved the transport of 20 cy of soil from STA 64+38 to STA 64+68 to stockpile area A. This soil will be spread and left in place. |
Grant Lidren |
| 11/1/2016 |
Offsite Soil or Groundwater Disposal Approved |
On this date, ADEC approved the transport of 50CY of Napthalene and DRO contaminated soil from project stationing 82+75 to 83+15 to the Anchorage Regional Landfill (ARL). |
Grant Lidren |
| 11/7/2016 |
Offsite Soil or Groundwater Disposal Approved |
On this date, ADEC approved the transport of 46 CY of napthalene and chloroform contaminated soil from project stationing 65+51 to 69+81 to the Anchorage Regional Landfill (ARL). |
Grant Lidren |
| 11/14/2016 |
Offsite Soil or Groundwater Disposal Approved |
On this date, ADEC approved the transport of 5 CY of naphthalene contaminated soil from project stationing 67+00 to the Anchorage Regional Landfill (ARL). |
Grant Lidren |
| 11/28/2016 |
Offsite Soil or Groundwater Disposal Approved |
On this date, ADEC approved the transport of 47 CY of naphthalene contaminated soil from project stationing 82+50 to 82+86 to the Anchorage Regional Landfill (ARL). ADEC also approved the transport of 49 CY of uncontaminated soil from project stationing 82+50 to 82+86 to stockpile area A. |
Grant Lidren |
| 4/27/2017 |
Offsite Soil or Groundwater Disposal Approved |
On this date, ADEC approved the transport of six stockpiles of soil (ranging from ~1.5 CY to 16.5CY) located within the interim stockpile area, comprised of material from STA 51+89, 55+37.14, 58+38.77, 58+49, 60+00, and 60+18. Analytical results for the soil stockpiles contained DRO, Arsenic, Naphthalene, 1-Methylnaphthalene, Benzo[a]anthracene, Benzo[a]pyrene, and 1,2,4-Trimethylbenzene above the ADEC cleanup levels. Material from Stockpiles STA 51+89, 55+37.14, 58+38.77, 60+00, and 60+18 will go to the Anchorage Regional Landfill (pending ARL approval) and transport material from Stockpile 58+49 to Alaska Soil Recycling (pending ASR approval). |
Grant Lidren |
| 5/10/2017 |
Offsite Soil or Groundwater Disposal Approved |
On this date approved the transport of a 13 cy stockpile comprised of material from STA 55+71.34. Analytical results for the soil stockpile contained DRO, Arsenic, Naphthalene, 2-Methylnaphthalene, 1-Methylnaphthalene, and 1,2,4-Trimethylbenzene above ADEC cleanup levels. Soil was transported to the Anchorage Regional Landfill. |
Grant Lidren |
| 5/19/2017 |
Offsite Soil or Groundwater Disposal Approved |
On May 3, 2017, three stockpiles within the lined containment cell in the Interim Stockpile were sampled as part of the ARRC Yard Water Upgrades Phase II project:Stockpile A: ~30 CY from STA 59+18 to 59+63; stockpile B: ~35 CY from STA 58+17 to 58+49; and Stockpile C: ~42 CY from STA 60+25 to 60+75. All analytical results from stockpiles A and C were either non-detect or detected below applicable ADEC cleanup levels. This soil will be transported to Stockpile Area A for final disposition. Analytical results from stockpile B contained Naphthalene and 1,2,4-Trimethylbenzene above ADEC cleanup levels. This material will be transferred to the Anchorage Regional Landfill.
|
Grant Lidren |
| 5/23/2017 |
Offsite Soil or Groundwater Disposal Approved |
On May 9, 2017, three stockpiles were sampled as part of the ARRC Yard Water Upgrades Phase II project: Stockpile A: ~38 CY from STA 55+37.14; Stockpile B: ~30 CY from 51+95; and Stockpile C: ~11 CY from STA 51+37.87 to 51+89. Analytical results from Stockpile A contained DRO, Naphthalene, 1,1,2,2-Tetrachloroethane, 1,2,4-Trimethylbenzene, Benzene, and Ethylbenzene above ADEC cleanup levels. Analytical results from Stockpile B contained Naphthalene, 1,1,2,2-Tetrachloroethane, Tetrachloroethene, and Trichloroethene above ADEC cleanup levels. Analytical results from Stockpile C contained Trichloroethene above ADEC cleanup levels. ADEC approved transport of the soil to the Anchorage Regional Landfill.
|
Grant Lidren |
| 6/27/2017 |
Document, Report, or Work plan Review - other |
On this date, ADEC reviewed and approved the Contaminated Soil and Groundwater Work Plan DiTomaso's Sewer Service dated June 22, 2017 submitted by Midnight Sun Environmental |
Grant Lidren |
| 7/24/2017 |
Offsite Soil or Groundwater Disposal Approved |
On this date, ADEC approved the transport of 1.27 cy Stockpile B, generated from STA 55+66.34, to the Anchorage Regional Landfill. This soil contains DRO, naphthalene, and 1,2,4-trimethylbenzene above method two migration to groundwater cleanup levels. |
Grant Lidren |
| 7/24/2017 |
Document, Report, or Work plan Review - other |
On this date, ADEC received the ARRC Yard Water Upgrade Project Phase I Soil and Groundwater Management Report dated October 14, 2016 submitted by Midnight Sun. In 2016, a total of 4,600 cubic yards (CYs) of soil was excavated along 765 linear feet during trenching activities. Of this, 2,478.7 was not returned to the excavation and the stockpiles were sampled to determine transport options. 1,603.7 CY was clean based off soil sample results and transported to the stockpile area A to be land spread and seeded. 875 CYs was considered contaminated and transported to the Anchorage Regional Landfill (ARL). This soil contained DRO, naphthalene, 1,1,2,2,-tetrachloroethane, PCE, and TCE concentrations above ADEC method two cleanup levels. Additionally, a total of 291 CYs of drilling mud and cuttings resulted from the horizontal directional drilling borings, of which 191 CY were transported to Stockpile Area A and 100 CY were transported to ARL for disposal. After the project, 10.5 CYs of sediment from Rain-For Rent tanks was stockpiled at Area B for later removal. ADEC approved this soil for transport to ARL on 9/12/16, but it remains onsite. |
Grant Lidren |
| 8/15/2017 |
Offsite Soil or Groundwater Disposal Approved |
ADEC approved transport of 6.5 CY of soil originating from Sta. 83+08 to Sta. 83+68 to the Anchorage Regional Landfill. Analytical results from this pile contained Benzo[a]anthracene and Benzo[a]pyrene above ADEC cleanup levels. |
Grant Lidren |
| 8/16/2017 |
Offsite Soil or Groundwater Disposal Approved |
ADEC approved transport of 2.5 CY of soil originating from bollards at Sta. 54+88.88 and 54+98.88 to the Anchorage Regional Landfill. Analytical results from this pile contained naphthalene above ADEC cleanup levels. |
Grant Lidren |
| 8/21/2017 |
Offsite Soil or Groundwater Disposal Approved |
ADEC approved transport of 16.2 CY of soil originating from Sta. 83+08 and Sta. 83+68 to the Anchorage Regional Landfill. Analytical results from this pile contained DRO, naphthalene, benzene, and benzo(a)pyrene above ADEC cleanup levels. |
Grant Lidren |
| 9/25/2017 |
Offsite Soil or Groundwater Disposal Approved |
On this date, ADEC approved transport of 3.1 CYs of soil to Columbia Ridge Landfill in Oregon. This soil originated from STA. 64+32 and Sta. 85.67. It contained petroleum constituents and chlorinated VOCs. |
Grant Lidren |
| 5/8/2018 |
Document, Report, or Work plan Review - other |
On this date, ADEC received the ARRC Yard Water Upgrade Project Phase II Soil and Groundwater Management Report dated October 18, 2017 submitted by Midnight Sun. In 2016 and 2017, a total of 3,200 cubic yards (CYs) of soil was excavated along 859 linear feet during trenching activities. Of this, 532.4 CY was not returned to the excavation and the stockpiles were sampled to determine transport options. 151.4 CY was clean based off soil sample results and transported to the stockpile area A to be land spread and seeded. 376 CYs was considered contaminated and transported to the Anchorage Regional Landfill (ARL), 2 CYs were transported to ASR, and 3 CY was transported to Columbia Ridge Landfill in Oregon. This soil contained DRO, naphthalene, benzene, benzo[a]anthracene, and benzo[a]pyrene concentrations above ADEC method two cleanup levels. |
Grant Lidren |
| 5/16/2018 |
Site Characterization Workplan Approved |
On this date, ADEC received the Work Plan for the ARRC Railroad Avenue PCB and CMP Site Investigation ADEC Hazard ID 26462 submitted by RSE and dated May 16, 2018. Up to 20 borings will be advanced at the former Prescott Equipment site to determine source of PCB contamination discovery in 2015 in sp-2. At least 16 analytical soil samples will be collected from depths of 0.5 ft. bgs and 3.0 ft. bgs and analyzed for PCBs. Additionally, the CMP discovered during utility work in July 2015 will be evaluated. |
Grant Lidren |
| 1/14/2019 |
Site Characterization Report Approved |
On this date, ADEC received the ARRC Railroad Avenue 2018 PCB Site Investigation Report Anchorage Terminal Reserve Utility Upgrades submitted by RSE and dated January 11, 2019. Sixteen soil borings were advanced to a depth of 3 feet bgs at the former Prescott Equipment – Post Road CC-IC site (HazId: 2745). One discrete soil sample was collected from each boring and analyzed for PCBs plus duplicates. Four soil samples collected from three borings at a depth of 1.3 to 2.2 feet bgs (below the apparent clean imported fill layer) contained PCBs above cleanup levels up to 2.69 mg/kg. |
Grant Lidren |
| 1/15/2019 |
Document, Report, or Work plan Review - other |
On this date, ADEC reviewed the ARRC Railroad Avenue Corrugated Metal Pipe (CMP) Investigation ADEC Hazard ID 26462: Near 2014 Post Road, Lots 24 and 25 Anchorage Terminal Reserve: Follow up from the 2015 Sewer Utility Project. This investigation was to further evaluate the potential source of oily water from a CMP encountered 6.5 feet bgs during excavation for the AWWU sewer line project in 2015(see 7/31/15 action). No definitive source was identified. It was suspected the CMP could be part of a historic storm drainage system along Post Road and under Railroad Avenue for discharge towards Ship Creek. Another possible source is the wastewater system at the Signature Land Service Shop Building adjacent and to the north on the CMP. This Shop Building reportedly contains a floor drain that drains into an estimated 200 gallon tank that then flowed into a 10,000 gallon waste water holding tank. This 10,000 gallon tank was removed in 2015 and the facility waste water is now piped to the AWWU sewer. The 200 gallon buried tank appears to be a gravity oil water separator evident by a depth of 4.1 feet of oily fluid/water in the tank noted during the investigation. |
Grant Lidren |
