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Site Report: ASD Abbott Loop Elementary School


Site Name: ASD Abbott Loop Elementary School
Address: 8427 Lake Otis Parkway, at East 84th Avenue, Anchorage, AK 99507
File Number: 2100.38.396
Hazard ID: 4664
Status: Cleanup Complete
Staff: ,
Latitude: 61.143889
Longitude: -149.832222
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 3/12/90 a 5,000 gallon (Tank 1) and ~672 gallon diesel USTs(Tank 2) were excavated and removed. Initial sampling results, from excavated soils collected on March 12, 1990 indicated the total petroleum hydrocarbons (THP) contamination ranged from 59 mg/kg in Sample 4 at 12 to 13.5 feet below ground surface (bgs) to 2,000 mg/kg in Sample 1 at 6 to 7.5 feet bgs. Groundwater was not encountered in the deepest borehole at 13.5 feet bgs. The contaminated soil was removed to a stockpile on site while a determination for disposal was being made. Eight confirmation samples taken from the excavation pit, analyzed on June 29, 1990 showed the TPH levels to range from non-detect (ND) to 27 mg/kg. Four confirmation samples were taken from the stockpile and the results of the TPH contamination ranged from ND to 110 mg/kg. One sample taken from the stockpile was analyzed and reported to be ND for BTEX, halogens and PCBs. The testing of the soils for arsenic, chromium, and lead did not indicate elevated concentrations for these elements relative to the background soils. No groundwater was encountered during the June 1990 sampling. Based on the results of the confirmation samples the excavation was backfilled with clean materials and approval to use the stockpiled soils as the base course of the parking lot and driveway paving was granted by ADEC on August 17, 1990. Record of Decision dated 11-21-08: Cleanup Complete without Insitiutional Controls.

Action Information

Action Date Action Description DEC Staff
4/13/1990 Site Characterization Report Approved Reviewed a copy of the Tetra Tech, Inc. report "Abbott Loop Elementary School - Soil Sampling" dated 3/26/90 received by the department on 3/30/90. On 3/12/90 a 5,000 gallon (Tank 1) and ~672 gallon diesel USTs (Tank 2) were excavated and removed. Sampling results indicated TPH contamination up to 2,000 mg/kg in Sample 1 from 6-7.5 feet bgs. GW not encountered in the deepest borehole to 13.5 feet bgs. Action added by Petrik. Ron Klein
4/13/1990 Cleanup Plan Approved After review of the Tetra Tech, Inc. (TT) report "Abbott Loop Elementary School - Soil Sampling" dated 3/26/90 received by the department on 3/30/90 and the TT "Initial Corrective Action Plan, Rogers Park, Lake Otis, and Abbott Loop Elementary Schools Underground Storage Tank and Contaminated Soil Removal" dated 5/25/90, a draft letter was composed this date to the ASD indicating that the levels of petroleum hydrocarbon contamination are sufficiently high enough to require remedial action under Alaska Statutes and finding the plan adequate to begin pursuit of corrective action activities. Action entered by Petrik. Ron Klein
8/29/1990 Cleanup Plan Approved The department received a cover letter and a copy of the Tetra Tech report "Abbott Loop Elementary School - Contaminated Soil Sampling and Disposal" dated 7/18/90 received by the department on 8/29/90. Based on sampling results indicating removal of contaminated soil exceeding cleanup levels, backfill of the excavation pit with clean material was approved on 7/2/90. The maximum sampling result was 27 mg/kg TPH. One sample of the stockpiled contaminated soil exceeded cleanup levels but was approved to be used as the base course of the parking lot and driveway paving. Action enetered by Petrik. Jennifer Roberts
7/21/2008 GIS Position Updated Used Google Maps in conjunction with a Site Map to obtain coordinates for a centroid location of both tanks combined. Bill Petrik
7/21/2008 Site Added to Database Site added to the database. Bill Petrik
7/21/2008 Exposure Tracking Model Ranking Initial ranking with ETM completed. Bill Petrik
10/3/2008 Meeting or Teleconference Held Meeting with Edie Knapp from ASD, Aaron Banks from R&M Consulting, Bill O'Connell and myself on 9-30-08 discussed this site. Pam Clemens
10/22/2008 Update or Other Action Sent out letter to Edie Knapp with ASD. Based on data from the further excavation by Tetra Tech in July 1990, confirmation samples were below ADEC action levels. ADEC will review this site for closure. Pam Clemens
11/6/2008 Exposure Tracking Model Ranking A new updated ranking with ETM has been completed for source area 75731 672 Gallon and 5,000 Gallon Diesel USTs. Pam Clemens
11/21/2008 Cleanup Complete Determination Issued Cleanup Complete without Institutional Controls ROD letter went out to ASD. Pam Clemens

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.

Missing Location Data

Because the GIS location data for this site has not been entered, we cannot direct you to its position on the map. Click "Continue" to proceed to the Contaminated Sites Web Map or "Close" to return to the site report.
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