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Site Report: Lawn Ranger Vehicle Leak Palmer-Wasilla Highway

Site Name: Lawn Ranger Vehicle Leak Palmer-Wasilla Highway
Address: 4621 East Palmer-Wasilla Highway, Wasilla, AK 99654
File Number: 2265.38.041
Hazard ID: 26478
Status: Cleanup Complete
Staff: No Longer Assigned, 9074655229 dec.icunit@alaska.gov
Latitude: 61.585378
Longitude: -149.333279
Horizontal Datum:WGS84

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

In November 2015 a release of diesel fuel occurred at the commercial property located at 4621 East Palmer-Wasilla Highway. The release occurred on the east side of the property in a partially asphalt-paved area. The volume and timeframe of the release is unknown and is reportedly from a diesel pickup truck that was being staged at the property. A drinking water well is located roughly 30 feet from the release location. The release was not originally reported as required by law; rather the stained soil was excavated and illegally dumped on various properties at the end of a cul-de-sac on Eldorado Drive in Wasilla, Alaska. The area where soil was dumped is being managed under a separate record, see Hazard ID 26479, file number 2265.38.042.

Action Information

Action Date Action Description DEC Staff
12/10/2015 Site Added to Database A new site has been added to the database Mitzi Read
12/10/2015 Spill Transferred from Prevention Preparedness and Response Program Spill transferred by PPR staff Gay Harpole. Spill no. 15239930301; spill date = 10/30/15; substance = diesel; quantity = unknown. Mitzi Read
12/10/2015 Exposure Tracking Model Ranking Initial ranking with ETM completed for source area id: 79841 name: Diesel Release from Vehicle Joshua Barsis
1/4/2016 Potentially Responsible Party/State Interest Letter Letter of state interest sent on this day. Joshua Barsis
1/4/2016 Update or Other Action Letter sent with a site history and request for cleanup. Work plan requested by February 1, 2016. Joshua Barsis
2/11/2016 Update or Other Action ADEC has not received the work plan, which was requested by February 1, 2016. A letter was sent on this day and requested contact by March 15, 2016 to discuss the status of this site. Joshua Barsis
5/20/2016 Document, Report, or Work plan Review - other Reviewed the Site Characterization Work Plan, dated May 17, 2016. Proposed activities consist of excavating the former spill location to native material and collecting soil samples from the base and sidewalls of the excavation to show that the extent of contamination has been delineated in the soil. Additionally, a water sample will be collected from the onsite drinking water well. Joshua Barsis
7/26/2016 Site Visit Site visit completed on July 26, 2016. DEC observed the excavation of roughly 15 cubic yards fill material at the location where the original release occurred. Samples were collected from the sidewalls and base of the excavation where native material was encountered. DEC requested GRO, DRO, RRO, and BTEX in all samples; VOCs in two samples; and PAHs in the worst-case scenario sample closest to the drinking water well (DWW). Preliminary results from the DWW sampling event (collected in June 2016) indicate that TCE is in the well at a concentration of 0.00273 mg/l. Quarterly monitoring of the well is required. A schedule of sampling will be submitted by August 10, 2016. Joshua Barsis
7/27/2016 Document, Report, or Work plan Review - other Reviewed work plan for quarterly drinking water well monitoring. Joshua Barsis
8/1/2016 Update or Other Action Results from the second drinking water well sampling event (collected on July 6, 2016) show TCE at 0.00179 mg/l. Joshua Barsis
9/15/2016 Update or Other Action Water samples were collected on this day from eight drinking water wells in the vicinity of this site. TCE was not identified in any of the wells. Joshua Barsis
10/20/2016 Document, Report, or Work plan Review - other Reviewed the Site Characterization Report, dated October 18, 2016 for the Lawn Ranger Vehicle Leak Palmer-Wasilla Highway site (located at 4621 East-Palmer Wasilla Highway). The site characterization activities were completed on July 26, 2016 and consisted of excavating the gravel fill material from the previous release at this location, that was not characterized following the initial excavation. After the former excavated boundary was demarcated, soil samples were collected from the base and sidewalls to show that the extent of soil contamination had been removed. All results for GRO, DRO, RRO, and VOCs were below the most stringent ADEC migration-to-groundwater cleanup levels. This report is approved and no further action is required in regards to the petroleum release at this location. In addition to the soil samples, a water sample was collected from the onsite drinking water well on June 16, 2016. Petroleum contamination was not present in the sample, however trichloroethylene (TCE) was detected at 2.73 ug/l, which is slightly below ADECs newest cleanup level of 2.8 ug/l (scheduled to be promulgated in November). A second water sample was collected in July 2016, and TCE was detected at 1.79 ug/l. The well is currently on an approved quarterly monitoring plan. It should be noted that the TCE is unrelated to the petroleum release, however, is still being tracked under this site file number. Joshua Barsis
11/2/2016 Update or Other Action Results from the third drinking water well sampling event (collected on October 10, 2016) show TCE at 0.00232 mg/l. Table C groundwater cleanup level for TCE is 0.0028 mg/l. Joshua Barsis
3/7/2017 Update or Other Action Results from the fourth drinking water well sampling event (collected on February 1, 2017) show TCE at 0.00183 mg/l. Table C groundwater cleanup level for TCE is 0.0028 mg/l. Joshua Barsis
3/7/2017 Exposure Tracking Model Ranking A new updated ranking with ETM has been completed for source area 79841 Diesel Release from Vehicle. Joshua Barsis
3/8/2017 Cleanup Complete Determination Issued Completed a review of the environmental records associated with the Lawn Ranger Vehicle Leak Palmer-Wasilla Highway site located at 4621 East Palmer-Wasilla Highway in Wasilla. 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. This site will be closed. Joshua Barsis

Contaminant Information

Name Level Description Media Comments
DRO < Method 2 Most Stringent Soil

Control Type

Type Details
No ICs Required

Requirements

Description Details
Advance approval required to transport soil or groundwater off-site.
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)
Hazard ID Site Name File Number
26479 Lawn Ranger Illegal Dumping - Eldorado Drive 2265.38.042

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