Site Report: Point Mackenzie Rehabilitation Center
| Site Name: | Point Mackenzie Rehabilitation Center |
|---|---|
| Address: | 13690 South Guernsey Road; Mile 0.6, Wasilla, AK 99687 |
| File Number: | 2265.26.020 |
| Hazard ID: | 23093 |
| Status: | Cleanup Complete |
| Staff: | No Longer Assigned, 9074655229 dec.icunit@alaska.gov |
| Latitude: | 61.417302 |
| Longitude: | -150.080278 |
| Horizontal Datum: | NAD83 |
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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
Tank removal site assessment indicates DRO contamination remains at the site above MCL. DRO contaminated soils above MCLs were backfilled into the excavation. Stockpile also remains with DRO contaminated soils above MCLs on a liner and covered. Vertical and lateral extent of contamination has not yet been defined.
Action Information
| Action Date | Action | Description | DEC Staff |
|---|---|---|---|
| 11/3/1999 | Leaking Underground Storage Tank Cleanup Initiated - Petroleum | The department received a copy of the Shannon & Wilson Inc. report titled "Underground Storage Tank Closure Assessment, Pt. MacKenzie Rehabilitation Center; Wasilla, Alaska, dated October 1999. | David Allen |
| 11/3/1999 | Site Added to Database | Former Staff | |
| 11/3/1999 | Leaking Underground Storage Tank Release Confirmed - Petroleum | LUST Site created in CSP for source area ID 77937 (Added by System) | David Allen |
| 12/6/1999 | Document, Report, or Work plan Review - other | The department reviewed a copy of the Shannon & Wilson Inc. report titled "Underground Storage Tank Closure Assessment, Pt. MacKenzie Rehabilitation Center; Wasilla, Alaska, dated October 1999. A 1,000-gallon diesel underground storage tank (UST) and a 500-gallon gasoline UST along with associated pad, piping, and dispenser were excavated and removed on 9/1/99. The products in the USTs were used to fuel on-site vehicles. Prior to removal, approximately (~) 150 gallons of diesel were transferred from the diesel UST to a holding tank and used to fuel vehicles, and ~5 gallons of gasoline were pumped from the gasoline UST and into a 55-gallon drum. Approximately 10 gallons of fuel/sludge mixture were disposed through Alaska Pollution Control and the USTs were disposed at Alaska Newell Recycling after being cut open, de-sludged, and “dry” cleaned. A receipt for the tanks was provided. The final excavation size was 15’x15’x8’ deep. Approximately 15 cubic yards (c.y.) of soil was stockpiled as a “clean” and designated Stockpile No. 1 and was later used to backfill the excavation. It was later determined by analytical results to contain soils above the DRO cleanup level. Approximately 8 c.y. of potentially contaminated soil, designated as Stockpile No. 2, was stockpiled and placed on a liner east of the garbage pit and also covered. A subpit was dug to ~13’ bgs in an attempt to find GW but did not encounter any. Based on local hydrogeologic data, GW is ~60’ bgs. A drinking water well is located ~180’ east-northeast of the former UST locations. Headspace and confirmation samples were collected from undisturbed soil in the sidewalls and bottom of the excavation. Samples that were sent to the laboratory were sampled for GRO, DRO, BTEX, and total lead. Analytical results indicated that three exceedances of cleanup levels were observed which were all for DRO: 950 mg/kg beneath the former diesel UST; 550 mg/kg in Stockpile No. 1; and 1,100 mg/kg in Stockpile No. 2. The vertical and lateral extent of the contamination is unknown and a release investigation and/or corrective action was recommended by the report. A letter was sent this date to Dan Breeden at ADOT&PF requesting a release investigation work plan. | Paul Pinard |
| 9/24/2002 | Update or Other Action | Site reassigned from Pinard to Sundet. | David Allen |
| 8/7/2006 | Update or Other Action | File number issued 2265.26.020 (FKA L65.29). | Aggie Blandford |
| 3/30/2007 | Update or Other Action | Staff reassigned from Sundet to Petrik. | Aggie Blandford |
| 3/6/2008 | Update or Other Action | Plotted the latitude and longitude to verify the accuracy of the currently listed coordinates. A better site map than is in the file is needed to improve the accuracy of the coordinates using desktop GISing or using a GPS while on site. Updated the landowner information based on the Matanuska-Susitna Borough Assessor's Office Web site information. | Bill Petrik |
| 3/11/2008 | Exposure Tracking Model Ranking | Initial ranking. | Bill Petrik |
| 5/25/2011 | Exposure Tracking Model Ranking | A new updated ranking with ETM has been completed for source area 77937 1,000 Gallon Diesel UST. | Bill O'Connell |
| 6/8/2011 | Cleanup Complete Determination Issued | The Alaska Department of Environmental Conservation, Contaminated Sites Program (ADEC) has completed a review of the environmental records associated with the Point Mackenzie Rehabilitation Center, located at 13690 South Guernsey Road near Wasilla, Alaska. 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 this site will be closed | Bill O'Connell |
| 8/31/2015 | Update or Other Action | This file has been archived at Alaska Archives Barcode 896962 Box 396 | Susan Carberry |
Contaminant Information
| Name | Level Description | Media | Comments |
|---|---|---|---|
| DRO | Between Method 2 Migration to Groundwater and Human Health/Ingestion/Inhalation | Soil |
Control Type
| Type | Details |
|---|---|
| No ICs Required |
Requirements
| Description | Details |
|---|---|
| Advance approval required to transport soil or groundwater off-site. |
No associated sites were found.