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Site Report: Blackard Property (AKA Mat-Su Incorporated)

Site Name: Blackard Property (AKA Mat-Su Incorporated)
Address: 1705 (1749) Ship Ave.;, Anchorage, AK 99501
File Number: 2100.26.130
Hazard ID: 24047
Status: Cleanup Complete - Institutional Controls
Staff: IC Unit, 9074655229 dec.icunit@alaska.gov
Latitude: 61.224014
Longitude: -149.849004
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.

Problems/Comments

On July 1990 a 500 gallon used oil tank and two 1000 gallon diesel tanks were removed. Soil and groundwater contamination was found along with numerous surface spills, and truck washing area with sheens. RP was issued a notice of violation for failure to report the spills. The groundwater at the site flows to the north toward Ship Creek, which is located about 100 feet to the north of the property. In 1992 three monitoring wells and 6 soil borings were installed. In May 1998 111 tons of contaminated soil was removed and subsequently thermally treated (in 2003). Groundwater sampling has identified solvents, DRO, and RRO in the groundwater. Soil sampling has identified BTEX, DRO, RRO, and solvent contamination remaining in the soil at the site. Further release investigation work (8 soil borings and 3 monitoring wells) was conducted on the property on April 2005. Contamination appears to extend off property to the north and west. An ARRC RI indicates the site is within a TCE plume, the exact source of which has not yet been identified. Additional release investigation work is needed off property to define the extent of the soil and groundwater contamination toward ship creek and at the former truck washing area on the property to the west. F.K.A. L55.10

Action Information

Action Date Action Description DEC Staff
7/3/1990 Site Visit Site inspection by ADEC noted several surface stains near equipment and drums. ADEC also noted a truck wash area (located on the adjacent property to the west they are also using) with sheens on the groundwater. Robert Weimer
7/3/1990 Site Added to Database Former Staff
7/3/1990 Leaking Underground Storage Tank Release Confirmed - Petroleum LUST Site created in CSP for source area ID 77978 Diesel and used oil contamination found during tank removals. Former Staff
7/4/1990 Leaking Underground Storage Tank Cleanup Initiated - Petroleum LCAU Date changed DB conversion Former Staff
10/16/1990 Underground Storage Tank Site Characterization or Assessment Soil sampling by S & S Engineering from 6 locations. 3 soil samples not acceptable because they were composite. No QA/QC report, site sketch identifying location of former tanks, improvements on site, or sampling locations. Former Staff
6/26/1992 Release Investigation Modified Level I/II Environmental Assessment submitted 6/26/92 for the soil and potential groundwater contamination. Three monitoring wells and 6 soil borings were installed. Workplan enclosed. Work required by EPA and DEC. Data Deliverables submitted, but questioned by EPA. Lab work subsequently sent to Juneau Lab for review. Former Staff
8/5/1993 Leaking Underground Storage Tank Corrective Action Underway ADEC approved 4/93 corrective action plan with 6/17/93 addendum. Plan includes sampling former tank excavations, dispensers, steam cleaning area and stockpiles. Surface stained areas will be excavated and sampled. Soil treatment plan for the excavated contaminated soil to follow. Former Staff
10/23/1997 Update or Other Action James Hayden's letter to Joe Blackard re: extension to 6/30/98 to conduct the corrective action work. Former Staff
11/20/1997 Update or Other Action ADEC sends Notification of Intent to Cost Recover Letter to Current Owner: JOE & MARY BLACKARD Former Staff
8/7/2003 Update or Other Action Talked with RP's consultant, Julie with Rockwell Engineering (907) 457-7625. She was requesting approval for the thermal treatment of the 80 cy of contaminated soil excavated in May 1998. She said she will provide a copy of the report. Robert Weimer
9/22/2003 Update or Other Action Approved corrective action plan for thermal treatment of the 80 cy stockpile at ASR. Soil was generated during the May 1998 excavation in former UST area. Robert Weimer
1/26/2004 Update or Other Action ADEC letter requesting release investigation, corrective action plan, and groundwater monitoring for remaining soil and groundwater contamination. Robert Weimer
1/29/2004 Update or Other Action Approved extension for release investigation workplan, groundwater monitoring, and corrective action plan. Robert Weimer
9/22/2004 Document, Report, or Work plan Review - other May 12, 2004 groundwater monitoring. Up to 1.46 mg/l DRO, 1.26 mg/l RRO, 0.55 mg/l cis-1,2-Dichloroethene, and Trichloroethene in groundwater. Highest in furthest downgradient monitoring well toward Ship Creek. Extent of groundwater contamination not known. Robert Weimer
9/24/2004 Update or Other Action DEC letter requesting groundwater monitoring and release investigation workplan by November 1, 2004. Robert Weimer
10/11/2004 Update or Other Action Approved extension request to submit release investigation workplan and groundwater results by December 15, 2004. Robert Weimer
4/28/2005 Document, Report, or Work plan Review - other October 13, 2004 groundwater monitoring. Up to 0.466 mg/l DRO, 0.586 mg/l cis-1,2-Dichloroethene, and 0.174 mg/l Trichloroethene in groundwater. Highest in furthest downgradient monitoring well toward Ship Creek. Full extent of groundwater contamination not known. Groundwater contamination has been identified as extending off property to the west. Robert Weimer
4/28/2005 Update or Other Action Review and conditional approval of proposed release investigation workplan to install 8 soil borings and three monitoring wells on the property. Additional release investigation work off property will be needed to define the full extent of the contamination. Robert Weimer
1/17/2007 Underground Storage Tank Site Characterization or Assessment Work Plan received from ARRC. 4 new monitoring wells proposed to evaluate contaminant migration onto and off of property. Work is part of Phase I/II conducted by ARRC. Bill O'Connell
4/6/2007 Underground Storage Tank Site Characterization or Assessment Received Phase II Site Assessment for 1749 Ship Ave. Four new MWs were installed and GW samples were collected from these wells and also from 4 existing wells. TCE found in soil at 10 feet bgs in MW-203. DRO, GRO, RRO, and benzene were ND for all soil samples.Groundwater samples had TCE above Table C in both onsite and upgradient wells at a maximum concentration of 0.118 mg/l in the duplicate sample from MW-1 onsite. Cis-1,2-DCE also detected above Table C in two wells. DRO, GRO, RRO, and benzene were not detected except one detection of benzene that was below Table C cleanup levels. Bill O'Connell
6/21/2007 Update or Other Action Remedial Investigation ARRC Anchorage Terminal Reserve U.S. EPA Docket No. CERCLA 10-2004-0065, submitted by ENSR and recieved by the ADEC on this date. This site is located at the Groundwater Area 1 in the Anchorage Terminal Reserve. The area is characterized by a TCE plume, which starts at Sitka Street next to Karens RV and flows west towards Ship Creek, passing through Mat-Su Incorporated. The highest concentration of TCE in the groundwater is located at Karens RV along Sitka street at 0.27 mg/L. TCE concentrations up to 0.031 found just NW of the property line at the Mat-Su Inc. Further analysis of this pathway will be performed in conjunction with the FS. A soil gas survey was performed at Karen's RV. No imminent threats to potential human receptors were identified. For more information consult CS file # 2100.38.447 ARRC Anchorage Terminal Reserve Bill O'Connell
10/9/2007 Underground Storage Tank Site Characterization or Assessment Received Soil Excavation and Groundwater Monitoring Report, 1749 Ship Ave. QA/QC conducted. Approximately 170 cubic yards of petroleum and solvent contaminated soil was removed from the area adjacent to the former waste oil tank. Confirmation sampling indicated soil remained in the excavation at concentrations above Method 2 soil cleanup levels including 10,800 mg/kg DRO, 11,700 mg/kg RRO, benzene at 0.19 mg/kg, TCE at 0.124 mg/kg, 1,2- and 1,4- dichlorobenzene at 71.3 mg/kg and 14.6 mg/kg, respectively. Groundwater samples were collected from MW-1 and MW-201. The sample from MW-1 contained TCE above the Table C cleanup level at 0.138 mg/l. Contaminated soil is temporarily stockpiled onsite. Additional excavation is anticipated for 2008. Bill O'Connell
2/12/2008 Update or Other Action Verified latitude and longitude coordinates with ArcGIS SPAR Statewide Locater Grant Lidren
5/16/2008 Cleanup Plan Approved Work plan approved for in-situ soil remediation. Several boreholes will be sampled to further delineate the extent of soil contamination in the vicinity of the former used oil tank. Regenox will then be injected at 25 injection points on a 7-foot grid and followup sampling will be conducted approximately 3 weeks after treatment. Bill O'Connell
8/27/2008 Underground Storage Tank Site Characterization or Assessment Received Regenox Injection and Soil Sampling Report. Prior to injection, soil samples collected from 5 soil borings contained DRO up to 3,720 mg/kg and RRO up to 8,000 mg/kg. Regenox injection was conducted at 33 locations on a 7 foot grid totaling 5,008 pounds of Regenox suspended in 5,634 gallons of water which saturated the soil such that no injection was required in the center of the treatment area. Post treatment samples collected 3 weeks later from approximately the same locations as pre-treatment samples contained DRO up to 4,380 mg/kg and RRO up to 8,000 mg/kg. Generally contaminant concentrations decreased in two areas, but increased in two other areas. Bill O'Connell
1/5/2009 Cleanup Complete Determination Issued The Alaska Department of Environmental Conservation, Contaminated Sites Program (ADEC) has completed review of the environmental records associated with the Blackard Property located at 1749 Ship Avenue in Anchorage. Based on the information provided to date, it has been determined that the contaminant concentrations remaining on site do not pose an unacceptable risk to human health or the environment and no further remedial action will be required as long as the site is in compliance with established institutional controls. Bill O'Connell
1/5/2009 Institutional Control Record Established Institutional Controls established and entered into the database. Bill O'Connell
6/12/2012 Institutional Control Compliance Review An IC review was conducted on this site, the reminder/tracker system was set up, and the staff assigned was changed from Bill O'Connell to IC Unit. Evonne Reese
1/2/2015 Institutional Control Update An IC reminder letter was issued to the responsible party on this date. Kristin Thompson
1/14/2015 Institutional Control Periodic Reporting Landowner informed ADEC that land use and ownership of this site have not changed; the property is still being used for truck storage and light maintenance. The lessee has changed, but the current lessee has been informed of the site conditions. Kristin Thompson
6/20/2018 Institutional Control Compliance Review IC compliance review conducted. Closure/IC Details updated. Reminder system already set for follow-up in 2020. Kristin Thompson
8/17/2020 Institutional Control Compliance Review IC Reminder letter sent to landowner (ARRC) on this date. Five year follow-up to document land use conditions. Reminder system set up for periodic reporting in August 2025. Cascade Galasso-Irish
9/22/2020 Institutional Control Update Received a confirmation email from a ARRC representative confirming that land use remains the same and that there are no known changes in the future. Evonne Reese
11/4/2025 Institutional Control Compliance Review IC compliance review completed on this date. An IC reminder letter was issued to the landowner. The next review will be in five years’ time. Gaige Robinson

Contaminant Information

Name Level Description Media Comments
DRO Between Method 2 Migration to Groundwater and Human Health/Ingestion/Inhalation Soil
Benzene Between Method 2 Migration to Groundwater and Human Health/Ingestion/Inhalation Soil

Control Type

Type Details
Signed CS Determination

Requirements

Description Details
Advance approval required to transport soil or groundwater off-site. Standard condition.
Other ARRC shall report to ADEC every five years to document land use, or report as soon as they become aware of any changes in land ownership and/or use.
Groundwater Use Restrictions Installation of groundwater wells will require approval from ADEC.
Other The monitoring wells installed at the property and the surrounding area may be utilized for area-wide groundwater monitoring as part of the ARRC Feasibility Study. However, any monitoring wells that are not needed for area-wise monitoring must be decommissioned in accordance with ADEC guidance as soon as it is determined they are no longer needed.
Movement or use of contaminated material (including on site) in a manner that results in a violation of the water quality standards is prohibited (18 AAC 70) Standard condition.

No associated sites were found.

Missing Location Data

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State of Alaska Department of Environmental Conservation

P.O. Box 111800
Juneau, AK 99811-1800
Phone: 907-465-5066
Fax: 907-465-5245
TDD: 800-770-8973
Physical Location: 410 Willoughby