Site Report: MOA - Bus Transit Facility 2 Former 10,000 Gallon Diesel USTs

Site Name:	MOA - Bus Transit Facility 2 Former 10,000 Gallon Diesel USTs
Address:	3625 A Dr. Martin Luther King Jr. Avenue, Anchorage, AK 99507
File Number:	2100.26.045
Hazard ID:	23950
Status:	Cleanup Complete
Staff:	No Longer Assigned, 9074655229 dec.icunit@alaska.gov
Latitude:	61.178100
Longitude:	-149.813700
Horizontal Datum:	NAD83

We make every effort to ensure the data presented here is accurate based on the best available information currently on file with DEC. It is therefore subject to change as new information becomes available. We recommend contacting the assigned project staff prior to making decisions based on this information.

Site Chronology
IC / Closure Details
Documents
Associated Sites

Problems/Comments

In 1992 during removal of two 10,000 gallon diesel USTs, diesel contamination from the USTs was found in the soil. GW varied between 6.99' and 8.6' bgs between 1/7/93 and 5/27/98. Approximately 235 cubic yards of contaminated soil was generated from excavation of the two 10,000-gallon diesel USTs in 1992 and was approved for transport to the Clitheroe Center on 8/2/95. These soils made up part of Cell A which was a total of 450 cy. Subsequent sampling at a later time indicated that Cell A was below migration to GW cleanup levels and the soils were approved for landspreading on 10/10/01. The soils from this site should not be confused with soils from multiple MOA sites that ended up in Cells A, B, or C at the Clitheroe Center. There were two unique groups of contaminated soil cells that existed on the Clitheroe property before they were ultimately remediated below migration to GW cleanup levels and then landspread. Former site address was 3650 C East Tudor Road. New address of 3625 A is for the new Paratransit Building which sits atop this site.

Action Information

Action Date	Action	Description	DEC Staff
6/9/1992	Site Added to Database		Former Staff
6/9/1992	Leaking Underground Storage Tank Release Confirmed - Petroleum	LUST Site created in CSP for source area ID 78065 Diesel and PCE contamination.	Former Staff
6/10/1992	Underground Storage Tank Site Characterization or Assessment	Sampling conducted during removal of tanks found contamination.	Robert Weimer
6/10/1992	Leaking Underground Storage Tank Cleanup Initiated - Petroleum	Contaminated soil excavated during tank removals.	Former Staff
8/5/1992	Update or Other Action	Notice of release letter sent.	Former Staff
12/30/1992	Document, Report, or Work plan Review - other	Reviewed a copy of the Hart Crowser "Old Transit Maintenance Facility, Diesel UST Removal" dated November 1992, A-8284-04. The lab data was received on 12/30/92 and the report on 5/11/98. On 10/20/92, two 10,000-gallon diesel USTs and associated piping were removed. These were Tanks #3 and #4 from ADEC UST Program Facility ID 1448. Both tanks appeared in good condition, showed slight oxidation, and no fuel stains were observed on either tank. Approximately 200 c.y. of soil from Stockpile B were determined to contain low concentrations of petroleum hydrocarbons and used to backfill the UST B excavation (southern UST). Stockpile A contained DRO concentrations below 751 mg/kg and were eligible to be disposed of at the Anchorage Regional Landfill. GW was encountered at 12-13’ bgs and no odor or sheen was observed. DRO ranged from ND to 15 mg/kg for excavation soil samples. These values are well below the cleanup level. Report actually reviewed on 6/4/09 but the action given the date the lab data was received for site chronology purposes.	Bill Petrik
2/19/1993	Document, Report, or Work plan Review - other	Reviewed a copy of the HartCrowser "Municipal Transit Maintenance Facility, Additional Water Quality Investigation, Anchorage, Alaska" dated February 1993, A-8245-05. The report was received on 2/19/93. The work related to this report was conducted to determine whether significant concentrations of dissolved phase extractable petroleum hydrocarbons (EPH)(DRO) identified in the groundwater on site during the initial investigation are being transported off site in the direction of water supply wells. On 1/6/93, two soil borings were drilled at the central and northern section of the western property boundary and subsequently finished as monitoring wells MW-6 and MW-7. A sample from each boring at the phreatic surface (10-11.5’ bgs) contained DRO concentrations of 5.1 mg/kg. This is far below above the soil cleanup level. GW sampling was ND for BTEX and DRO ranged from 0.18 mg/l in MW-6 to 0.2 mg/l in MW-7.Based on the results of this investigation, water supply wells down gradient are not being adversely impacted by GW contamination on this site. The report was actually reviewed on 6/4/09 but the action given the date the report was received for site chronology purposes.	Bill Petrik
3/30/1994	Document, Report, or Work plan Review - other	Reviewed a copy of the HartCrowser "Tudor Road Maintenance Facility, Groundwater Sampling", A-8387-00, dated 3/25/94, received on 3/30/94. On 3/7/94 monitoring well MW-6 was measured for static water level, purged, and sampled. MW-7 had problems and was not sampled at the time. Sampling results indicated ND for BTEX and DRO at 0.12 mg/l. This value is well below the cleanup level. The report was actually reviewed on 6/4/09 but the action given the date the report was received for site chronology purposes.	Bill Petrik
7/12/1994	Document, Report, or Work plan Review - other	Reviewed a copy of the HartCrowser "Tudor Road Maintenance Facility, Groundwater Sampling", A-8387-00, dated 6/24/94, received on 7/12/94 (?). On 6/10/94 monitoring wells MW-6 and MW-7 were measured for static water level, purged, and sampled. Sampling analyses indicated that both wells were ND for BTEX and DRO was 0.10 mg/l in MW-6 and 0.29 mg/l in MW-7. These values are well below the cleanup level. The report was actually reviewed on 6/4/09 but the action given the date the report was received for site chronology purposes.	Bill Petrik
11/16/1994	Document, Report, or Work plan Review - other	Reviewed a copy of the HartCrowser "Tudor Road Maintenance Facility, Groundwater Sampling", A-8387-00, dated 10/1994, received on 11/16/94. On 9/28/94 monitoring wells MW-6 and MW-7 were measured for static water level, purged, and sampled for BTEX only. Sampling analyses indicated that both wells were ND for BTEX. On 10/6/94 monitoring wells MW-6 and MW-7 were again measured for static water level, purged, and sampled for DRO only. Sampling analyses indicated that DRO was 0.10 mg/l in MW-6 and 0.13 mg/l in MW-7. These values are well below the cleanup level. The report was actually reviewed on 6/4/09 but the action given the date the report was received for site chronology purposes.	Bill Petrik
6/19/1995	Document, Report, or Work plan Review - other	Reviewed a copy of the HartCrowser "Diesel UST Stockpile Sampling, MOA Transit Maintenance Barn, Anchorage, Alaska", A-8284-06, dated 6/15/95, received on 6/19/95. On 5/31/95, 25 discrete samples were collected from two stockpiles resulting from the removal of UST A, the northern of two USTs removed in 1992, and field screened with a PID. Six samples with the highest PID readings, along with a duplicate sample, were submitted for laboratory analysis for DRO. The results were compared to the Level A of 100 mg/kg for DRO. Results ranged from 31 to 71 mg/kg. These values are well below the cleanup level. The report was actually reviewed on 6/4/09 but the action given the date the report was received for site chronology purposes.	Bill Petrik
8/2/1995	Offsite Soil or Groundwater Disposal Approved	Approval granted to dispose of approximately 235 cubic yards of contaminated soil generated from a single excavation of two 10,000-gallon diesel USTs in 1992 at the MOA Transit Maintenance Barn located at 3640 East Tudor Road. Laboratory analysis of samples indicate that all results were below Level "A" of 100 mg/kg DRO. Action appended by Petrik.	Robert Weimer
2/1/1996	Document, Report, or Work plan Review - other	Reviewed a copy of the HartCrowser "Tudor Road Maintenance Facility, Groundwater Sampling", A-8387-00, dated 1/4/96, received on 2/1/96. On 12/12/95 monitoring wells MW-6 and MW-7 were measured for static water level, purged, and sampled. Sampling analyses indicated that both wells were ND for BTEX and DRO was 0.11 mg/l in MW-6 and 0.15 mg/l in MW-7. These values are well below the cleanup level. The report was actually reviewed on 6/4/09 but the action given the date the report was received for site chronology purposes.	Bill Petrik
11/20/1997	Update or Other Action	ADEC sends "Notification of Intent to Cost Recover" letter to current owner: Municipality of Anchorage, FMD.	Jim Hayden
4/20/1998	Update or Other Action	In a letter sent this date to the MOA, the ADEC indicated that the last monitoring report received was in 1/96. The CSP requested subsequent monitoring reports for department review. Any additional release investigation and corrective action information or work plans should be submitted as well. Action added by Petrik on 6/3/09.	Lynne Bush
10/20/1998	Document, Report, or Work plan Review - other	Reviewed a copy of the HartCrowser "Tudor Road Maintenance Facility, May 1998 Groundwater Sampling", A-8387-01, dated 7/8/98, received on 10/20/98. On 5/27/98 monitoring wells MW-6 and MW-7 were measured for static water level, purged, and sampled. Sampling analyses indicated that both wells were ND for BTEX and DRO. These values are well below the cleanup level. During the 6/25/97 groundwater monitoring event, total xylenes were detected in MW-6 at 0.0014 mg/l but all other BTEX and DRO analytes were ND. This was the first time since GW monitoring of MW-6 and MW-7 began that any BTEX constituent was detected. The report was actually reviewed on 6/4/09 but the action given the date the report was received for site chronology purposes.	Bill Petrik
12/1/1998	Release Investigation	Awaiting Confirmation Samples from "Clean" stockpile	Daniel Rogers
2/28/2001	Update or Other Action	Sent a letter out this date sunmmarizing salient site actions to date and requested a work plan to investigate the extent of the releases from these two tanks and to perform corrective action. The letter also requested correcting database entries for all tanks at this facility.	Lynne Bush
8/28/2001	Site Characterization Workplan Approved	Reviewed the Shannon & Wilson, Inc. "Work Plan for Soil Pile Sampling, Clitheroe Center, Anchorage, Alaska" dated 8/20/01. Approximately 450 c.y. of contaminated soil was removed from the site and transported to the Clitheroe Center and stockpiled as Cell A. These soils were above the Method 1 cleanup levels for GRO and DRO. The work plan calls for screening the stockpiles at a minimum frequency of 1 sample per 10 c.y. and then submitting two soil samples for DRO analysis only for the first 50 c.y. of stockpiled soil and then one soil sample per 50 c.y. thereafter. This will mean a total of 8 samples submitted for analysis for Cell A. Two duplicate samples will e submitted as well. Signed a form this date approving the work plan for the field screening and sampling of three storage cells at the Clitheroe Center proceeding at the consultnat's/RP's proposed schedule.	Lynne Bush
10/10/2001	Offsite Soil or Groundwater Disposal Approved	Reviewed a copy of the Shannon & Wilson, Inc. "Results of Soil Pile Sampling and Proposed Soil Disposal, Clitheroe Center Soil Piles, Anchorage, Alaska" dated 10/8/01, received on an unknown date. 935 cubic yards of contaminated soil was transported to Clitheroe Center property for long-term storage as Cells A, B, and C. Soil is contaminated with DRO, GRO, BTEX, and PCE. Cell A is composed of 450 c.y. of contaminated soil from two 10,000-gallon diesel USTs. Cell B is composed of 350 c.y. of contaminated soil from a used oil/water separator excavated in 1993. Cell C is composed of 115 c.y. of contaminated soil from an approximately 12,000-gallon diesel UST excavated and removed in 1998 and 20 c.y. from an approximate 500-gallon UST removed in 1998. In October 2000, Cell A was field screened and sampled to evaluate remediation progress. Field screening was performed at a frequency of 1 sample per 10 c.y. Based on field headspace readings, two samples were selected for lab analysis for GRO and DRO. The lab results indicated that GRO was ND and GRO ranged between 183 mg/kg and 225 mg/kg. On August 31, 2001, at a frequency of 1 sample per 10 c.y. 45 soil screening samples were collected from Cell A. Soil screening sample depths ranged from 1.5’ to 4.3’. Screening sample readings varied between 0 and 4.4 ppmV. 11 samples were submitted for DRO lab analysis which included one duplicate. The depths these samples were taken from varied between 1.5’ and 3.5’ into the stockpile and PID readings of the sample submitted for lab analysis ranged from 1.9 to 4.4 ppmV. Lab results indicated that DRO ranged from 94.2 to 230 mg/kg. These values are below the 18 AAC 75.341 Method 2 Migration to GW cleanup levels. The report recommended that the soils be removed from its cell and spread in a field to the minimum thickness practical which is estimated to be 6-8”. The field has no future planned use for cultivation. The report was actually reviewed on 6/5/09 but the action given the date of the report for site chronology purposes. A form was signed this date approving the workplan to dispose of soil from the Clitheroe Center long-term storage Cells A, B, and C at the location, manner, and schedule as described in the work plan to ptoceed. The CSP recommends planting this are with grass in the spring to stabilize the soil.	Lynne Bush
10/8/2002	Offsite Soil or Groundwater Disposal Approved	Reviewed the MOA, Facility and Fleet Management letter "New Transit Maintenance Underground Storage Tank Contaminated Stockpiles, Facility ID 585" dated 10/7/02. Approval to transport and thermally remediate fifty tons petroleum contaminated soil to ASR, generated when four USTs and an in-place closure of an OWS were performed in August 2000. Action changed and Comments appended 6/5/09 by Petrik.	Lynne Bush
7/24/2003	Update or Other Action	Site transferred from Bush to Dreyer	Amanda Dreyer
2/4/2004	Update or Other Action	File number changed from L69.14 to 2100.26.045	Sarah Cunningham
5/1/2004	Update or Other Action	The 964 cubic yards of contaminated soil stored at the Clitheroe Center property was sampled to check the progress of the remediation. Only a limited sampling for DRO was conducted, it found between 54.8 mg/kg and 237mg/kg.	Robert Weimer
1/18/2006	Leaking Underground Storage Tank Corrective Action Underway	Mailed a letter this date in response to review of the Shannon & Wilson, Inc. "Environmental Management Plan; MOA Paratransit Addition; 3650 C East Tudor Road; Anchorage, Alaska", dated November 2005. The purpose for the Environmental Management Plan (EMP) is to address the handling and remediating/disposing of potentially contaminated soil and groundwater that may be encountered during construction of the Municipality of Anchorage (MOA) Paratransit Addition at 3650 C East Tudor Road, Anchorage, Alaska. In the event contaminated material is encountered, it is proposed in the EMP that any potentially impacted soil will not be excavated, but moved within the excavation to allow foundation preparation. Based on the data provided, on-site contamination associated with this project is not considered a risk to human health or the environment and DEC approves the EMP. DEC’s determination is based on current site conditions. Should site conditions change and/or remaining contamination become a risk to human health or the environment, additional actions may be required. Action added by Petrik.	David Pikul
3/2/2006	Update or Other Action	ADEC reviewed and approved the revised Shannon & Wilson, Inc. "Long-Term Storage Cell Characterization, Clitheroe Center Property, Anchorage, Alaska" dated 1/23/06, workplan for collecting confirmation samples from the 964 cubic yards of contaminated soil currently stockpiled at the Clitheroe Center property. Action appended by Petrik on 6/5/09.	Robert Weimer
6/7/2006	Document, Report, or Work plan Review - other	March 9, 2006 sampling of the contaminated soils at the Clitheroe Center property. Up to 2.59 mg/kg GRO, 111 mg/kg DRO, 0.0163 mg/kg benzene, and 0.330 mg/kg methylene chloride. The methylene chloride sample exceeds the cleanup level of 0.015 mg/kg. Request to landspread was denied. Action appended by Petrik on 6/5/09.	Robert Weimer
9/15/2006	Update or Other Action	ADEC reviewed and approved the Shannon & Wilson, Inc. "Request to Landspread Soil, Long Term Storage Cells, Clitheroe Center Property, Anchorage, Alaska" dated 5/10/06, workplan for collecting confirmation VOC samples from the 964 cubic yards of contaminated soil currently stockpiled at the Clitheroe Center property. They will be conducting multi-increment sampling on each of the two stockpiles.	Robert Weimer
4/30/2007	Document, Report, or Work plan Review - other	ADEC reviewed the Shannon & Wilson, Inc. "Results of Additional Characterization and Follow Up Request to Landspread Soil, Long Term Storage Cells, Clitheroe Center Property, Anchorage, Alaska" dated 10/2/06, received via email on 3/14/07. Based on sample results the soil meets default cleanup levels. Action appended by Petrik on 6/5/09.	Robert Weimer
4/30/2007	Document, Report, or Work plan Review - other	September 15, 2006 sampling for VOCs in each of the two cells. All samples meet default cleanup levels.	Robert Weimer
6/6/2007	Update or Other Action	Site management transferred from Pikul to Petrik.	Shannon Oelkers
5/29/2008	Update or Other Action	Improved the latitude and longitude using Google Maps. Added the Legal Description after using MOA web resources to determine it.	Bill Petrik
6/2/2008	Exposure Tracking Model Ranking	Initial ranking.	Bill Petrik
8/13/2008	Cleanup Plan Approved	ADEC reviewed the Shannon & Wilson, Inc. "Results of Additional Characterization and Follow UP Request to Landspread Soil, Long Term Storage Cells, Clitheroe Center Property, Anchorage, Alaska" dated 10/2/06, received via email on 3/14/07, and approved spreading of 964 cubic yards of soil at the Clitheroe Center via email. Based on sample results the soil meets default cleanup levels. Action appended by Petrik on 6/5/09.	Robert Weimer
6/3/2009	Document, Report, or Work plan Review - other	Reviewed a copy of the Shannon & Wilson, Inc. "Excavation Monitoring and Well Decommissioning, MOA Paratransit Addition, Anchorage, Alaska" dated 4/22/08, received by the department on 5/7/08. Soil excavation activities were associated with construction of the MOA Paratransit Addition west and northwest of Building C. The site contains a Maintenance Support Division, Bus Storage Building, and a paved parking lot. The area related to this report was 50’ north of a former 500-gallon used oil UST removed in 1997 and 75’ west of another former 500-gallon used oil UST removed in 1997. Based on Figure 2 of the report, neither of these UST sites were within the footprint of the Paratransit Addition although the area does include the two former 10,000 gallon USTs. Target analytes were not detected in the sample collected from Monitoring Well MW-1 that was associated with investigation of the Paratransit Addition Footprint so it was decommissioned on 11/30/07. The well casing was surrounded by concrete so the casing was not removed. The PVS casing was cut to ~6” above the concrete surface and filled with bentonite chips, hydrated at intervals during filling. Other field activities consisted of field screening soil excavated during foundation and utility installation efforts. Excavated soil was temporarily stockpiled on site. One sample was collected and screened for VOCs with a PID for approximately every 10 cubic yards of stockpiled soil. Readings ranged from 0.0 ppm to 1.5 ppm with only one reading at 1.5 and the remaining PID readings in ppm being between 0, and 0.5, with the predominant reading of 0.3 ppm. Because no soil was transported off site, and the stockpiled soils were used to backfill the excavations, no analytical samples were collected. The project tasks were conducted in general accordance with the scope described in the S&W November 2005 Environmental Management Plan that was approved by Dave Pikul of the Alaska Department of Environmental Conservation (ADEC) on 1/18/96.	Bill Petrik
6/9/2009	Exposure Tracking Model Ranking	A new updated ranking with ETM has been completed for source area 78065 2 Former 10,000 Diesel Gallon Diesel USTs.	Bill Petrik
6/12/2009	Site Visit	During a site visit today to verify that the Paratransit Building was finished, it was noted that the site address changed from 3650 D East Tudor Road to 3701 Dr. Martin Luther King Jr. Avenue. Made corrections in the Contaminated Sites Program (CSP) Database.	Bill Petrik
6/15/2009	Cleanup Complete Determination Issued	A letter from the CSP was sent this date to the RP. No ICs. Stockpile has been remediated and there are no outstanding site issues or requirements.	Bill Petrik

Action Date

Action

Description

DEC Staff

6/9/1992

Site Added to Database

Former Staff

6/9/1992

Leaking Underground Storage Tank Release Confirmed - Petroleum

LUST Site created in CSP for source area ID 78065 Diesel and PCE contamination.

Former Staff

6/10/1992

Underground Storage Tank Site Characterization or Assessment

Sampling conducted during removal of tanks found contamination.

Robert Weimer

6/10/1992

Leaking Underground Storage Tank Cleanup Initiated - Petroleum

Contaminated soil excavated during tank removals.

Former Staff

8/5/1992

Update or Other Action

Notice of release letter sent.

Former Staff

12/30/1992

Document, Report, or Work plan Review - other

Reviewed a copy of the Hart Crowser "Old Transit Maintenance Facility, Diesel UST Removal" dated November 1992, A-8284-04. The lab data was received on 12/30/92 and the report on 5/11/98. On 10/20/92, two 10,000-gallon diesel USTs and associated piping were removed. These were Tanks #3 and #4 from ADEC UST Program Facility ID 1448. Both tanks appeared in good condition, showed slight oxidation, and no fuel stains were observed on either tank. Approximately 200 c.y. of soil from Stockpile B were determined to contain low concentrations of petroleum hydrocarbons and used to backfill the UST B excavation (southern UST). Stockpile A contained DRO concentrations below 751 mg/kg and were eligible to be disposed of at the Anchorage Regional Landfill. GW was encountered at 12-13’ bgs and no odor or sheen was observed. DRO ranged from ND to 15 mg/kg for excavation soil samples. These values are well below the cleanup level. Report actually reviewed on 6/4/09 but the action given the date the lab data was received for site chronology purposes.

Bill Petrik

2/19/1993

Document, Report, or Work plan Review - other

Reviewed a copy of the HartCrowser "Municipal Transit Maintenance Facility, Additional Water Quality Investigation, Anchorage, Alaska" dated February 1993, A-8245-05. The report was received on 2/19/93. The work related to this report was conducted to determine whether significant concentrations of dissolved phase extractable petroleum hydrocarbons (EPH)(DRO) identified in the groundwater on site during the initial investigation are being transported off site in the direction of water supply wells. On 1/6/93, two soil borings were drilled at the central and northern section of the western property boundary and subsequently finished as monitoring wells MW-6 and MW-7. A sample from each boring at the phreatic surface (10-11.5’ bgs) contained DRO concentrations of 5.1 mg/kg. This is far below above the soil cleanup level. GW sampling was ND for BTEX and DRO ranged from 0.18 mg/l in MW-6 to 0.2 mg/l in MW-7.Based on the results of this investigation, water supply wells down gradient are not being adversely impacted by GW contamination on this site. The report was actually reviewed on 6/4/09 but the action given the date the report was received for site chronology purposes.

Bill Petrik

3/30/1994

Document, Report, or Work plan Review - other

Reviewed a copy of the HartCrowser "Tudor Road Maintenance Facility, Groundwater Sampling", A-8387-00, dated 3/25/94, received on 3/30/94. On 3/7/94 monitoring well MW-6 was measured for static water level, purged, and sampled. MW-7 had problems and was not sampled at the time. Sampling results indicated ND for BTEX and DRO at 0.12 mg/l. This value is well below the cleanup level. The report was actually reviewed on 6/4/09 but the action given the date the report was received for site chronology purposes.

Bill Petrik

7/12/1994

Document, Report, or Work plan Review - other

Reviewed a copy of the HartCrowser "Tudor Road Maintenance Facility, Groundwater Sampling", A-8387-00, dated 6/24/94, received on 7/12/94 (?). On 6/10/94 monitoring wells MW-6 and MW-7 were measured for static water level, purged, and sampled. Sampling analyses indicated that both wells were ND for BTEX and DRO was 0.10 mg/l in MW-6 and 0.29 mg/l in MW-7. These values are well below the cleanup level. The report was actually reviewed on 6/4/09 but the action given the date the report was received for site chronology purposes.

Bill Petrik

11/16/1994

Document, Report, or Work plan Review - other

Reviewed a copy of the HartCrowser "Tudor Road Maintenance Facility, Groundwater Sampling", A-8387-00, dated 10/1994, received on 11/16/94. On 9/28/94 monitoring wells MW-6 and MW-7 were measured for static water level, purged, and sampled for BTEX only. Sampling analyses indicated that both wells were ND for BTEX. On 10/6/94 monitoring wells MW-6 and MW-7 were again measured for static water level, purged, and sampled for DRO only. Sampling analyses indicated that DRO was 0.10 mg/l in MW-6 and 0.13 mg/l in MW-7. These values are well below the cleanup level. The report was actually reviewed on 6/4/09 but the action given the date the report was received for site chronology purposes.

Bill Petrik

6/19/1995

Document, Report, or Work plan Review - other

Reviewed a copy of the HartCrowser "Diesel UST Stockpile Sampling, MOA Transit Maintenance Barn, Anchorage, Alaska", A-8284-06, dated 6/15/95, received on 6/19/95. On 5/31/95, 25 discrete samples were collected from two stockpiles resulting from the removal of UST A, the northern of two USTs removed in 1992, and field screened with a PID. Six samples with the highest PID readings, along with a duplicate sample, were submitted for laboratory analysis for DRO. The results were compared to the Level A of 100 mg/kg for DRO. Results ranged from 31 to 71 mg/kg. These values are well below the cleanup level. The report was actually reviewed on 6/4/09 but the action given the date the report was received for site chronology purposes.

Bill Petrik

8/2/1995

Offsite Soil or Groundwater Disposal Approved

Approval granted to dispose of approximately 235 cubic yards of contaminated soil generated from a single excavation of two 10,000-gallon diesel USTs in 1992 at the MOA Transit Maintenance Barn located at 3640 East Tudor Road. Laboratory analysis of samples indicate that all results were below Level "A" of 100 mg/kg DRO. Action appended by Petrik.

Robert Weimer

2/1/1996

Document, Report, or Work plan Review - other

Reviewed a copy of the HartCrowser "Tudor Road Maintenance Facility, Groundwater Sampling", A-8387-00, dated 1/4/96, received on 2/1/96. On 12/12/95 monitoring wells MW-6 and MW-7 were measured for static water level, purged, and sampled. Sampling analyses indicated that both wells were ND for BTEX and DRO was 0.11 mg/l in MW-6 and 0.15 mg/l in MW-7. These values are well below the cleanup level. The report was actually reviewed on 6/4/09 but the action given the date the report was received for site chronology purposes.

Bill Petrik

11/20/1997

Update or Other Action

ADEC sends "Notification of Intent to Cost Recover" letter to current owner: Municipality of Anchorage, FMD.

Jim Hayden

4/20/1998

Update or Other Action

In a letter sent this date to the MOA, the ADEC indicated that the last monitoring report received was in 1/96. The CSP requested subsequent monitoring reports for department review. Any additional release investigation and corrective action information or work plans should be submitted as well. Action added by Petrik on 6/3/09.

Lynne Bush

10/20/1998

Document, Report, or Work plan Review - other

Reviewed a copy of the HartCrowser "Tudor Road Maintenance Facility, May 1998 Groundwater Sampling", A-8387-01, dated 7/8/98, received on 10/20/98. On 5/27/98 monitoring wells MW-6 and MW-7 were measured for static water level, purged, and sampled. Sampling analyses indicated that both wells were ND for BTEX and DRO. These values are well below the cleanup level. During the 6/25/97 groundwater monitoring event, total xylenes were detected in MW-6 at 0.0014 mg/l but all other BTEX and DRO analytes were ND. This was the first time since GW monitoring of MW-6 and MW-7 began that any BTEX constituent was detected. The report was actually reviewed on 6/4/09 but the action given the date the report was received for site chronology purposes.

Bill Petrik

12/1/1998

Release Investigation

Awaiting Confirmation Samples from "Clean" stockpile

Daniel Rogers

2/28/2001

Update or Other Action

Sent a letter out this date sunmmarizing salient site actions to date and requested a work plan to investigate the extent of the releases from these two tanks and to perform corrective action. The letter also requested correcting database entries for all tanks at this facility.

Lynne Bush

8/28/2001

Site Characterization Workplan Approved

Reviewed the Shannon & Wilson, Inc. "Work Plan for Soil Pile Sampling, Clitheroe Center, Anchorage, Alaska" dated 8/20/01. Approximately 450 c.y. of contaminated soil was removed from the site and transported to the Clitheroe Center and stockpiled as Cell A. These soils were above the Method 1 cleanup levels for GRO and DRO. The work plan calls for screening the stockpiles at a minimum frequency of 1 sample per 10 c.y. and then submitting two soil samples for DRO analysis only for the first 50 c.y. of stockpiled soil and then one soil sample per 50 c.y. thereafter. This will mean a total of 8 samples submitted for analysis for Cell A. Two duplicate samples will e submitted as well. Signed a form this date approving the work plan for the field screening and sampling of three storage cells at the Clitheroe Center proceeding at the consultnat's/RP's proposed schedule.

Lynne Bush

10/10/2001

Offsite Soil or Groundwater Disposal Approved

Reviewed a copy of the Shannon & Wilson, Inc. "Results of Soil Pile Sampling and Proposed Soil Disposal, Clitheroe Center Soil Piles, Anchorage, Alaska" dated 10/8/01, received on an unknown date. 935 cubic yards of contaminated soil was transported to Clitheroe Center property for long-term storage as Cells A, B, and C. Soil is contaminated with DRO, GRO, BTEX, and PCE. Cell A is composed of 450 c.y. of contaminated soil from two 10,000-gallon diesel USTs. Cell B is composed of 350 c.y. of contaminated soil from a used oil/water separator excavated in 1993. Cell C is composed of 115 c.y. of contaminated soil from an approximately 12,000-gallon diesel UST excavated and removed in 1998 and 20 c.y. from an approximate 500-gallon UST removed in 1998. In October 2000, Cell A was field screened and sampled to evaluate remediation progress. Field screening was performed at a frequency of 1 sample per 10 c.y. Based on field headspace readings, two samples were selected for lab analysis for GRO and DRO. The lab results indicated that GRO was ND and GRO ranged between 183 mg/kg and 225 mg/kg. On August 31, 2001, at a frequency of 1 sample per 10 c.y. 45 soil screening samples were collected from Cell A. Soil screening sample depths ranged from 1.5’ to 4.3’. Screening sample readings varied between 0 and 4.4 ppmV. 11 samples were submitted for DRO lab analysis which included one duplicate. The depths these samples were taken from varied between 1.5’ and 3.5’ into the stockpile and PID readings of the sample submitted for lab analysis ranged from 1.9 to 4.4 ppmV. Lab results indicated that DRO ranged from 94.2 to 230 mg/kg. These values are below the 18 AAC 75.341 Method 2 Migration to GW cleanup levels. The report recommended that the soils be removed from its cell and spread in a field to the minimum thickness practical which is estimated to be 6-8”. The field has no future planned use for cultivation. The report was actually reviewed on 6/5/09 but the action given the date of the report for site chronology purposes. A form was signed this date approving the workplan to dispose of soil from the Clitheroe Center long-term storage Cells A, B, and C at the location, manner, and schedule as described in the work plan to ptoceed. The CSP recommends planting this are with grass in the spring to stabilize the soil.

Lynne Bush

10/8/2002

Offsite Soil or Groundwater Disposal Approved

Reviewed the MOA, Facility and Fleet Management letter "New Transit Maintenance Underground Storage Tank Contaminated Stockpiles, Facility ID 585" dated 10/7/02. Approval to transport and thermally remediate fifty tons petroleum contaminated soil to ASR, generated when four USTs and an in-place closure of an OWS were performed in August 2000. Action changed and Comments appended 6/5/09 by Petrik.

Lynne Bush

7/24/2003

Update or Other Action

Site transferred from Bush to Dreyer

Amanda Dreyer

2/4/2004

Update or Other Action

File number changed from L69.14 to 2100.26.045

Sarah Cunningham

5/1/2004

Update or Other Action

The 964 cubic yards of contaminated soil stored at the Clitheroe Center property was sampled to check the progress of the remediation. Only a limited sampling for DRO was conducted, it found between 54.8 mg/kg and 237mg/kg.

Robert Weimer

1/18/2006

Leaking Underground Storage Tank Corrective Action Underway

Mailed a letter this date in response to review of the Shannon & Wilson, Inc. "Environmental Management Plan; MOA Paratransit Addition; 3650 C East Tudor Road; Anchorage, Alaska", dated November 2005. The purpose for the Environmental Management Plan (EMP) is to address the handling and remediating/disposing of potentially contaminated soil and groundwater that may be encountered during construction of the Municipality of Anchorage (MOA) Paratransit Addition at 3650 C East Tudor Road, Anchorage, Alaska. In the event contaminated material is encountered, it is proposed in the EMP that any potentially impacted soil will not be excavated, but moved within the excavation to allow foundation preparation. Based on the data provided, on-site contamination associated with this project is not considered a risk to human health or the environment and DEC approves the EMP. DEC’s determination is based on current site conditions. Should site conditions change and/or remaining contamination become a risk to human health or the environment, additional actions may be required. Action added by Petrik.

David Pikul

3/2/2006

Update or Other Action

ADEC reviewed and approved the revised Shannon & Wilson, Inc. "Long-Term Storage Cell Characterization, Clitheroe Center Property, Anchorage, Alaska" dated 1/23/06, workplan for collecting confirmation samples from the 964 cubic yards of contaminated soil currently stockpiled at the Clitheroe Center property. Action appended by Petrik on 6/5/09.

Robert Weimer

6/7/2006

Document, Report, or Work plan Review - other

March 9, 2006 sampling of the contaminated soils at the Clitheroe Center property. Up to 2.59 mg/kg GRO, 111 mg/kg DRO, 0.0163 mg/kg benzene, and 0.330 mg/kg methylene chloride. The methylene chloride sample exceeds the cleanup level of 0.015 mg/kg. Request to landspread was denied. Action appended by Petrik on 6/5/09.

Robert Weimer

9/15/2006

Update or Other Action

ADEC reviewed and approved the Shannon & Wilson, Inc. "Request to Landspread Soil, Long Term Storage Cells, Clitheroe Center Property, Anchorage, Alaska" dated 5/10/06, workplan for collecting confirmation VOC samples from the 964 cubic yards of contaminated soil currently stockpiled at the Clitheroe Center property. They will be conducting multi-increment sampling on each of the two stockpiles.

Robert Weimer

4/30/2007

Document, Report, or Work plan Review - other

ADEC reviewed the Shannon & Wilson, Inc. "Results of Additional Characterization and Follow Up Request to Landspread Soil, Long Term Storage Cells, Clitheroe Center Property, Anchorage, Alaska" dated 10/2/06, received via email on 3/14/07. Based on sample results the soil meets default cleanup levels. Action appended by Petrik on 6/5/09.

Robert Weimer

4/30/2007

Document, Report, or Work plan Review - other

September 15, 2006 sampling for VOCs in each of the two cells. All samples meet default cleanup levels.

Robert Weimer

6/6/2007

Update or Other Action

Site management transferred from Pikul to Petrik.

Shannon Oelkers

5/29/2008

Update or Other Action

Improved the latitude and longitude using Google Maps. Added the Legal Description after using MOA web resources to determine it.

Bill Petrik

6/2/2008

Exposure Tracking Model Ranking

Initial ranking.

Bill Petrik

8/13/2008

Cleanup Plan Approved

ADEC reviewed the Shannon & Wilson, Inc. "Results of Additional Characterization and Follow UP Request to Landspread Soil, Long Term Storage Cells, Clitheroe Center Property, Anchorage, Alaska" dated 10/2/06, received via email on 3/14/07, and approved spreading of 964 cubic yards of soil at the Clitheroe Center via email. Based on sample results the soil meets default cleanup levels. Action appended by Petrik on 6/5/09.

Robert Weimer

6/3/2009

Document, Report, or Work plan Review - other

Reviewed a copy of the Shannon & Wilson, Inc. "Excavation Monitoring and Well Decommissioning, MOA Paratransit Addition, Anchorage, Alaska" dated 4/22/08, received by the department on 5/7/08. Soil excavation activities were associated with construction of the MOA Paratransit Addition west and northwest of Building C. The site contains a Maintenance Support Division, Bus Storage Building, and a paved parking lot. The area related to this report was 50’ north of a former 500-gallon used oil UST removed in 1997 and 75’ west of another former 500-gallon used oil UST removed in 1997. Based on Figure 2 of the report, neither of these UST sites were within the footprint of the Paratransit Addition although the area does include the two former 10,000 gallon USTs. Target analytes were not detected in the sample collected from Monitoring Well MW-1 that was associated with investigation of the Paratransit Addition Footprint so it was decommissioned on 11/30/07. The well casing was surrounded by concrete so the casing was not removed. The PVS casing was cut to ~6” above the concrete surface and filled with bentonite chips, hydrated at intervals during filling. Other field activities consisted of field screening soil excavated during foundation and utility installation efforts. Excavated soil was temporarily stockpiled on site. One sample was collected and screened for VOCs with a PID for approximately every 10 cubic yards of stockpiled soil. Readings ranged from 0.0 ppm to 1.5 ppm with only one reading at 1.5 and the remaining PID readings in ppm being between 0, and 0.5, with the predominant reading of 0.3 ppm. Because no soil was transported off site, and the stockpiled soils were used to backfill the excavations, no analytical samples were collected. The project tasks were conducted in general accordance with the scope described in the S&W November 2005 Environmental Management Plan that was approved by Dave Pikul of the Alaska Department of Environmental Conservation (ADEC) on 1/18/96.

Bill Petrik

6/9/2009

Exposure Tracking Model Ranking

A new updated ranking with ETM has been completed for source area 78065 2 Former 10,000 Diesel Gallon Diesel USTs.

Bill Petrik

6/12/2009

Site Visit

During a site visit today to verify that the Paratransit Building was finished, it was noted that the site address changed from 3650 D East Tudor Road to 3701 Dr. Martin Luther King Jr. Avenue. Made corrections in the Contaminated Sites Program (CSP) Database.

Bill Petrik

6/15/2009

Cleanup Complete Determination Issued

A letter from the CSP was sent this date to the RP. No ICs. Stockpile has been remediated and there are no outstanding site issues or requirements.

Bill Petrik

Contaminant Information

Name	Level Description	Media	Comments
DRO	< Method 2 Most Stringent	Soil	All excavation confirmation samples <=15 mg/kg DRO.

Name

Level Description

Media

Comments

DRO

< Method 2 Most Stringent

Soil

All excavation confirmation samples <=15 mg/kg DRO.

Control Type

Type	Details
No ICs Required

Type

Details

No ICs Required

Requirements

Description	Details
Advance approval required to transport soil or groundwater off-site.

Description

Details

Advance approval required to transport soil or groundwater off-site.

2009-06-12 Cleanup Complete Without ICs.pdf

Hazard ID	Site Name	File Number
616	MOA - Public Works Transit Facility	2100.38.327
26127	MOA - Transit Maintenance Facility Tank 585-3	2100.26.578
26716	MOA Transit Maintenance Facility USTs 1 & 13	2100.26.607

Missing Location Data

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Site Report: MOA - Bus Transit Facility 2 Former 10,000 Gallon Diesel USTs

Site Chronology

IC / Closure Details

Documents

Associated Sites

Problems/Comments

Action Information

Contaminant Information

Control Type

Requirements

2009-06-12 Cleanup Complete Without ICs.pdf

Missing Location Data

State of Alaska Department of Environmental Conservation