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Site Report: Odom Corporation (244 Nelchina Street)

Site Name: Odom Corporation (244 Nelchina Street)
Address: 244 Nelchina Street at East 3rd Avenue, Anchorage, AK 99502
File Number: 2100.26.190
Hazard ID: 24784
Status: Cleanup Complete
Staff: No Longer Assigned, 9074655229 dec.icunit@alaska.gov
Latitude: 61.219681
Longitude: -149.857720
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

Leaking Tank. F.K.A. L55.320. On May 30, 1998 UST #1, a 2,000 gallon diesel tank, was removed by Dames & Moore. Petroleum stained soil was encountered and the pit was over-excavated after the UST was removed. Soil samples taken from the final excavation did not show any elevated PID readings. A total 54 tons of soil was excavated and stored on a liner on-site. Laboratory samples taken in May, 1998 showed GRO at 367 mg/kg; DRO, four feet below the dispenser, at 25,700 mg/kg; Benzene up to 0.408 mg/kg, and xylenes up to 41.7 mg/kg. Other BTEX constituents were below soil cleanup levels and HVOCs (DCE and TCE) were not tested for until 2000. Soil sampling has continued at the site with DRO levels decreasing to 8,680 mg/kg in October 1999 and Benzene up to 0.0431 mg/kg in October 1999. The soil samples from the UST area, that were taken in May 2000 during the monitoring well (MW) installation, showed GRO up to 13.3 mg/kg and DRO up to 57.7 mg/kg. In October 2003 a Stain Area 2 was investigated. Three soil samples were collected for analysis from the center bottom, southwest corner, and south central edge of the Stain Area 2 excavation at 1.5 feet bgs. All samples showed DRO, RRO and BTEX were below ADEC cleanup levels. GRO was not analyzed at this location. One sample with the highest PID reading, in Stain Area 2, was sampled for polynuclear aromatic hydrocarbons (PAH), no analytes were detected above ADEC cleanup levels. Groundwater investigations started in May 2000. The groundwater samples were up to 107 mg/L for DRO. The benzene level was above ADEC cleanup requirements in MW 50 at 0.00691 mg/L. GRO, Toluene, Ethylbenzene and total Xylenes were below ADEC cleanup levels in May 2000. On June 2, 2000 two water seep samples from peak water discharges on the bluff-face at the southeast corner of the property showed DRO, GRO RRO and BTEX below their respective method reporting limits and ADEC cleanup levels. One seep sample from June 2, 2000 contained a detectable concentration of a solvent byproduct (1,2 DCA) at 0.00209 mg/L that was below the ADEC cleanup level. Based on this VOCs were added to the analytical sampling for future groundwater monitoring. URS, the consultant, stated that "the presence of volatile organic compounds (VOCs) and solvent byproducts (1,1 DCA) in the seep samples provided evidence for an off-site source contributing to contamination that was migrating onto the Nelchina property." The Halogenated Volatile Organic Compounds (HVOCs): TCE and DCE (cis and trans) were first tested for in the groundwater monitoring of October 2002. Levels have gone down between 2002 and 2008 with all results below ADEC cleanup levels. Vinyl Chloride (VC) sampling also began in October 2002's groundwater sampling event. The VC level in MW 48 has fluctuated from less than 0.001 mg/L in October 2002, to 0.00278 in June of 2008 and 0.00212 in October of 2008. The ADEC cleanup level is 0.002 mg/L. All other levels were below ADEC cleanup requirements. Non-LUST issues are being tracked under Hazard ID 25572.

Action Information

Action Date Action Description DEC Staff
5/30/1998 Leaking Underground Storage Tank Release Confirmed - Petroleum LUST Site created in CSP for source area ID 77251 Request to haul approximately 100cy of diesel contaminated soil on June 2, 1998. Former Staff
5/30/1998 Site Added to Database Former Staff
6/1/1998 Update or Other Action Proposal submitted by Dames and Moore to remove contaminated soil to Anchorage Soil Recycling Former Staff
6/2/1998 Update or Other Action Haul Away of 100 cy of Contaminated soil approved by Paul Pinard. Former Staff
10/30/1998 Underground Storage Tank Site Characterization or Assessment Submitted by Dames and Moore, Reviewed by Colin Bayse, Additional Information requested by 28 Feb, 1999. Former Staff
10/30/1998 Leaking Underground Storage Tank Cleanup Initiated - Petroleum entered by JC Former Staff
1/21/1999 Update or Other Action Response to request for additional Information submitted by Dames & Moore Former Staff
3/4/1999 Update or Other Action Workplan requested by 28 Feb 1999 Former Staff
7/20/1999 Release Investigation Submitted by Dames & Moore, Reviewed by Elaine Cederstrom. Former Staff
7/30/1999 Update or Other Action Release Investigation and work plan conditionally approved. Former Staff
10/4/1999 Update or Other Action Fax to respond to concerns in 30 Jul 1999 letter from Dames & Moore. Former Staff
10/7/1999 Update or Other Action Review and comments on 25 Oct 1999 installation of Monitoring Well by Ms. Elaine Cederstrom. Former Staff
4/26/2001 Update or Other Action Approved transport of sump sediment to ASR; area not served primarily by community or private wells, changed on ranking to reflect this. Lynne Bush
4/1/2002 Update or Other Action MWs #76, 77, 78: Odom agreed to decommission these wells after remediation is complete at other area sites. Specifically, the Odom Orca Street (L55.260) site and 135 Post Road site (CS100.233). Beatrice Egbejimba
6/18/2002 Update or Other Action Transferred to Amanda Dreyer Lynne Bush
4/19/2004 Update or Other Action Site transferred to Bush. Lynne Bush
4/22/2004 Update or Other Action Letter requesting update sent to owner of record. Lynne Bush
5/3/2004 Update or Other Action Letter returned, "Addressee Unknown". Re-sent to Odom corporate HQ in Anchorage and Seattle. Lynne Bush
5/7/2004 Update or Other Action Letter resent to new address. Lynne Bush
6/17/2004 Update or Other Action Approved cost recovery invoice. Lynne Bush
6/22/2004 Update or Other Action Called RP and left a message because he was not in. Lynne Bush
5/9/2006 Update or Other Action Project management transferred from Bush to Petrik. Aggie Blandford
7/13/2006 Update or Other Action Staff reassigned from Petrik to Olson. Bill Petrik
7/13/2006 Update or Other Action Using Figure 1 from the URS "Letter Report - October 2003 Sample Results; Release Investigation and Corrective Action - 244 Nelchina Street, Anchorage, Alaska" dated 11/18/03 in conjunction with the Anchorage Area Atlas and TopoZone Pro updated the erroneous coordinates in both decimal degrees and degrees, minutes and seconds. Plotted with No Topo Base Map on a Large Size Map at 1:3,333 Scale using High-Resolution Urban Aerial Photography. High degree of confidence in accuracy of coordinates. The map crosshairs represents the centroid of contamination as there are multiple spills on site. Coordinates could only be improved using a GPS on site. Used MOA web resources to update landowner information. Bill Petrik
6/19/2008 Update or Other Action Rec'd Groundwater Monitoring work plan. Eileen Olson
8/5/2008 Update or Other Action ADEC received results from June 30, 2008 groundwater survey and monitoring for the 135 South Post Rd and 244 Nelchina St Odom sites, and a figure showing groundwater flow direction. Samples collected on June 30 had concentrations below ADEC Cleanup Levels for all petroleum hydrocarbon contaminants of concern with detections of cis-1,2-DCE, TCE, chloroform, trans 1,2-DCE, and vinyl chloride below their respective ADEC Cleanup Levels at both sites. Based on the Post Road area wells groundwater survey the groundwater flow direction was to the northwest. The consultant concluded that no additional wells are needed at either site and stated that the continued northwest groundwater flow direction further confirms that there is an upgradient, off-site source(s) for the chlorinated solvents migrating onto Odom parcels, with the consultant stating that the presence of chloroform suggests that a preferential pathway may exist along an underground water utility line. The wells for both sites are to be sampled in September/October with the results of both the June and fall sampling events to be presented after analytical results are available. Eileen Olson
11/3/2008 Update or Other Action ADEC received and approved a request for transport and disposal of Investigation Derived Waste for all three open Odom sites (240 West 1st, 244 Nelchina Street and 135 South Post Road). Emerald Alaska was contracted to transport and dispose the waste, consisting of four 55-gallon drums of groundwater generated during groundwater sampling activities at the sites in July and October 2008. Eileen Olson
2/11/2009 Exposure Tracking Model Ranking Initial ranking with ETM completed for source area id: 77251 name: Odom Corporation (244 Nelchina Street) Pam Clemens
2/26/2009 Conceptual Site Model Submitted URS report for Odom Corporation, 244 Nelchina Street, dated January 19, 2009, contained a conceptual site model in addition to the groundwater sampling data from June and October 2008. Pam Clemens
6/22/2009 Document, Report, or Work plan Review - other Completed review of the URS 2008 Groundwater Monitoring Report, submitted January 27, 2009. Sampling took place June 30 and October 17, 2008. MW-48 had detectable VOCs including cis,1,2-dichloroethylene (DCE) and trans-1,2 DCE in the October 2008 sampling event (0.028 mg/L and 0.00101 mg/L respectively) . These values are below the ADEC cleanup levels of 0.07 mg/L for cis-DCE and 0.1 mg/L for trans-DCE in groundwater. Vinyl Chloride (VC) values were 0.00212 mg/L in 2008 which is slightly above the 0.002 mg/L Groundwater Cleanup Level. Although there were detections in the other two monitoring wells (MW-50B and MW-81) for cis-DCE, trans-DCE, and VC; no values were above the Groundwater Cleanup levels. GRO, DRO and RRO values, in all three monitoring wells, were below Groundwater Cleanup Levels. Pam Clemens
9/10/2009 Document, Report, or Work plan Review - other Reviewed and approved the 2009 Groundwater Monitoring Report submitted by URS. Four groundwater samples were collected June 1, 2009. VOCs, except Vinyl Chloride, were below the ADEC groundwater cleanup levels. It has been determined that the vinyl chloride is from an off-site upgradient source. There were no detections above groundwater cleanup levels, for GRO, DRO and RRO in the last four monitoring events. Pam Clemens
11/1/2010 Exposure Tracking Model Ranking A new updated ranking with ETM has been completed for source area 77251 Odom Corporation (244 Nelchina Street). Pam Clemens
11/9/2010 Cleanup Complete Determination Issued Based on 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 with institutional controls. Pam Clemens
11/9/2010 Institutional Control Record Established Institutional Controls established and entered into the database. Pam Clemens
12/13/2010 Final Cleanup Report Reviewed Electronic copy of the well decommissioning report received, received and approved. Waiting for the signed Attachment A – Agreement Page for the institutional controls (ICs) before removing the ICs and changing the status to Cleanup Complete in the database. Pam Clemens
12/29/2010 Long Term Monitoring Complete The long term monitoring at this site has ended. The remaining monitoring wells have been removed and the Attachment A: Cleanup Complete-ICs Agreement and Signature Page has been returned and filed. Pam Clemens
12/29/2010 Institutional Control Record Removed The signed Attachment A: Cleanup Complete-ICs Agreement and Signature Page was returned this date (electronically) and the final monitoring well decommissioning report has been received and approved. The institutional controls associated with this site can be removed with the stipulation that ADEC must approve any soil and groundwater transport off-site and ADEC must approve the installation of any drinking water wells on-site. Pam Clemens
8/7/2015 Update or Other Action The file has been archived in Alaska Archives Barcode: 896984 Box 418 Susan Carberry

Contaminant Information

Name Level Description Media Comments
DRO < Method 2 Most Stringent Soil
GRO < Method 2 Most Stringent Soil
Vinyl chloride > Table C Groundwater It was determined that the vinyl chloride is from an off-site upgradient source.
Benzene < Method 2 Most Stringent Soil
DRO < Table C Groundwater
Benzene < Table C Groundwater

Control Type

Type Details
No ICs Required

Requirements

Description Details
Advance approval required to transport soil or groundwater off-site.
Hazard ID Site Name File Number
25572 Odom Corporation 2009 Dumping Event (244 Nelchina Street) 2100.38.519

Missing Location Data

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