| Action Date |
Action |
Description |
DEC Staff |
| 7/9/1996 |
Leaking Underground Storage Tank Release Confirmed - Petroleum |
LUST Site created in CSP for source area ID 77968, ADD; Waste oil contamination. ADEC Tank ID 438, Tank #1. |
Robert Weimer |
| 7/9/1996 |
Underground Storage Tank Site Characterization or Assessment |
SA1A; Reviewed a Phase 1 Site Assessment. |
Robert Weimer |
| 7/9/1996 |
Site Added to Database |
Received a SOA, DEC, Oil and Hazardous Materials Incident Report Form from Dan Young of Terrasat, Inc. indicating that remnants of an "empty" tank were partially released during UST removal/closure. The tank was covered with concrete, preventing total product removal. Containment and cleanup up were completed by 3:30 PM. A hand shovel, plastic bucket, and back hoe were used to recover the oily water and soils with contact. Two soil samples from below the affected area were obtained for clean up verification. One sample was collected for waste characterization. |
Robert Weimer |
| 7/10/1996 |
Leaking Underground Storage Tank Cleanup Initiated - Petroleum |
LUST corrective action underway. LCAU date changed DB conversion. |
Robert Weimer |
| 11/20/1997 |
Update or Other Action |
ADEC sends Notification of Intent to Cost Recover Letter to Current Owner: John W. Pastos & Robert J. Zorick. |
Jim Hayden |
| 6/19/2001 |
Update or Other Action |
Letter sent requesting update on site status and planned actions with schedule. |
Lynne Bush |
| 8/13/2001 |
Underground Storage Tank Site Characterization or Assessment |
Reviewed the TERRASAT, Inc. report "Underground Storage Tank Site Assessment; 6407 Brayton Drive; Anchorage, Alaska" dated August 1996 received by the department on 7/9/01. Sent a letter to the RP this date inquiring as to what happened to the containerized contaminated soil that was generated during tank closure?
A 475-gallon used oil UST was excavated and removed on 7/9/96. During concrete removal by the excavating contractor which was required to remove the UST, the UST was damaged and resulted in a release of approximately 15 gallons of the residual oil from the UST. Sorbent pads were immediately deployed to stop the flow and contain the release. Contaminated soil resulting from the damage to the UST was removed from the excavation using shovel and backhoe. Approximately 165 gallons of contaminated soil was placed in three 55-gallon drums.
The black coated steel UST condition appeared good but was destroyed during the process of separating the concrete from it. Surface rust was minor and there were no apparent holes. The tank was 5.6 ‘ long and 3.8’ in diameter. No sludge was present in the tank and it was subsequently disposed at Alaska Metals Recycling by the excavating contractor.
Field screening during excavation revealed contamination around the fill pipe. Total depth of the excavation was 4.9’, 1’ lower than the former UST. 2 confirmation samples below the tank were collected and taken from the excavation bottom, above the water table, one from the west side of the tank/fill pipe at 4.25’ bgs which was closest to the building (sample 7-9-1637 and its dup., 7-9-1705) and the other from the east side of the excavation (7-9-1612) at 4.9’ bgs. They were submitted to a laboratory for analysis for RRO, GRO, DRO, and BTEX. No confirmation samples could be taken on the south side of the excavation due to caving and risk to the structure. 1 characterization sample was taken from an area with fresh oil contamination in the south center of the excavation with the intent to characterize the “worst case” soil for disposal and to determine if additional analyses would be required for cleanup. This sample (7-9-1529) taken at 3.2’ bgs was analyzed for RRO, GRO, DRO, BTEX, total lead, total cadmium, total arsenic, total chromium, PCBs, and halogenated solvents. Analytical results indicated that no PCBs or hazardous chlorinated volatiles were detected from the characterization sample. However, GRO, DRO, benzene, toluene, total arsenic, and total chromium were 280 mg/kg, 820 mg/kg, 0.31 mg/kg, 7.2 mg/kg, 14 mg/kg and 31 mg/kg, respectively, and exceeded their migration to ground water cleanup levels.
The excavation was partially backfilled with soil deemed “uncontaminated” that was removed from around the tank during its removal. No confirmation samples were taken of this soil. Additional backfill came from Anchorage Sand and Gravel.
GW was encountered at 4.8’ bgs. Water supply is from an onsite well.
A letter from the Storage Tank Program was sent this date requesting written proof of the proper disposal of the petroleum-contaminated soil that was stored on site, or if still on-site, a work plan for its disposal by 9/28/01.
|
Lynne Bush |
| 9/29/2001 |
Update or Other Action |
Received a faxed letter from Joyce Zorick indicating that the three containerized drums of soil filled at the site were taken by North Star Contractors to the Hiland Disposal site in either ther fall of 1996 or the spring of 1997. Hiland Road staff siad that their records did not go back that far. Soil transported without DEC approval. |
Lynne Bush |
| 12/21/2001 |
Update or Other Action |
Staff changed from Bush to Sundet. |
Lynne Bush |
| 3/14/2006 |
Update or Other Action |
Staff changed from Sundet to Petrik. |
Bill Petrik |
| 7/19/2006 |
Update or Other Action |
Latitude and longitude data in decimal degrees and degrees, minutes, and seconds gathered from TopoZone Pro Hi-Res Aerial Photo, Large Size Map, 1:3,333 Scale, No Topo Base Map, NAD 83 in conjunction with the Anchorage Area Atlas and Figure 1, Location Map from the Terrasat, Inc. “Underground Storage Tank Site Assessment, 6407 Brayton Drive” dated August 1996. High degree of confidence in the accuracy of the site coordinates at former tank site. Coordinates can only be improved by on-site GPS reading. Legal description added and landowner information updated. |
Bill Petrik |
| 4/10/2008 |
Exposure Tracking Model Ranking |
Initial ranking. |
Bill Petrik |
| 10/13/2009 |
Update or Other Action |
Contacted AWWU to determine that the site is NOT on MOA water. Went to the ADNR Well Log Tracking System (WELTS) web site and was unable to find a well log of the onsite well. Well depths within a 1/8th mile radius range from 60' to 143'. |
Bill Petrik |
| 10/23/2009 |
Exposure Tracking Model Ranking |
Spelling errors in the initial ranking with ETM updated for source area id: 77968 name: Former 475 Gallon Used Oil UST. |
Bill Petrik |
| 10/23/2009 |
Exposure Tracking Model Ranking |
A new updated ranking with ETM has been completed for source area 77968 Former 475 Gallon Used Oil UST. |
Bill Petrik |
| 12/14/2009 |
Cleanup Complete Determination Issued |
A Record of Decision (ROD) and Corrective Action Complete Determination were issued for the site. No institutional controls are required.
|
Bill Petrik |
