| Action Date |
Action |
Description |
DEC Staff |
| 3/19/1990 |
Update or Other Action |
(Old R:Base Action Code = SI - Site Investigation). The report was part of a company site assessment program. Groundwater was encountered at 8 feet. The soils borings found fine to medium grained sand to a depth of at least 10 feet. The local GW flow was estimated towards the south. A soil gas survey as well as groundwater and soil samples were obtained. 1,1,1-trichloroethane at 37 ppm, 0.019 ppm, 1,1,2,2-trichloeothane, 0.099 ppm ET, 3.7 ppm tetrachloroethene and 35 ppm xylenes were detected in GW samples. Soil samples collected had 8.3 ppm ethylbenzene, 39 ppm xylenes, 8,400 ppm TPH, 51 ppm 1,1,1-trichloroethane, 45 ppm napthalene, 210 ppm 2-methylnapthalene, and 74 ppm barium. HVOs were found largely in site assessment Areas #4 and #5. Xylenes were found in Areas #4, #5 and #7. |
Former Staff |
| 8/20/1993 |
Site Added to Database |
Chlorinated and non-chlorinated solvents. |
Former Staff |
| 8/20/1993 |
Site Ranked Using the AHRM |
Initial ranking. |
Former Staff |
| 8/23/1993 |
Update or Other Action |
(Old R:Base Action Code = RAU - Remedial Actions Underway (General)). |
Former Staff |
| 2/16/1994 |
Update or Other Action |
(Old R:Base Action Code = RAPR - Remedial Action Plan Review (CS)). Further investigation required. |
Former Staff |
| 2/16/1994 |
Update or Other Action |
(Old R:Base Action Code = SA1R - Phase I SA Review (CS/LUST)). Additional assessment is required to determine groundwater contaminant plume and extent of soil contamination. |
Former Staff |
| 2/17/1994 |
Update or Other Action |
(Old R:Base Action Code = RARR - Remedial Action Report Review (CS)). Comments provided to the RP. |
Former Staff |
| 6/3/1994 |
Update or Other Action |
(Old R:Base Action Code = SA2R - Phase II SA Review (CS)). |
Paul Horwath |
| 6/16/1995 |
Site Ranked Using the AHRM |
Site reranked. Release value changed from 4 to 3, Air Exposure Index Value from 2 to 1, and GW Exposure Index Value from 0.8 to 0.4. Score changed from 230.4 to 93.60001. |
Paul Horwath |
| 7/21/1999 |
Cleanup Plan Approved |
Work plan for excavation of contaminated soils approved. |
Don Fritz |
| 1/8/2001 |
Update or Other Action |
Combined non-redundant information from duplicate site, Trading Bay Road Jobbers, Reckey 1990230903102, into this site. |
Don Fritz |
| 8/10/2001 |
Meeting or Teleconference Held |
Met with John Miller and Carey regarding soil stockpile. |
Former Staff |
| 2/20/2004 |
Update or Other Action |
File number assigned and entered into the Fileroom DB and CS DB. |
Alyce Hughey |
| 5/10/2004 |
Update or Other Action |
Phone call with John Miller regarding proposed plans. Identified concerns with proposal, all of which he agreed with. Provided verbal approval so that they could get the HRC in transit |
Don Fritz |
| 5/18/2004 |
Site Characterization Report Approved |
Sent letter to John Miller identifying comments concerning 2003 Remedial Activities Report, and approving proposal to spread the soils. Required a plan for confirmation sampling of the spread soils, which has an average DRO concentration of 415 mg/kg. |
Don Fritz |
| 5/18/2004 |
Cleanup Plan Approved |
Provided conditional approval of 2004 Remedial Activities Work Plan for excavation, stockpiling, and groundwater remediation using HRC. |
Don Fritz |
| 6/17/2004 |
Meeting or Teleconference Held |
Met with John Miller and Carrey Brannan regarding ongoing site activities |
Don Fritz |
| 8/11/2004 |
Site Characterization Report Approved |
Reviewed May 2004 groundwater monitor results for 5 on-site monitor wells. June 12, 2004 report prepared by Lawrence Acomb (Geospere). |
Don Fritz |
| 8/18/2005 |
GIS Position Updated |
Using Figure 1 and 2 from a Site Assessment Report, from CHM2 Hill, dated July 1, 1991, in conjunction with TopoZone Pro and the KPB Parcel Lookup, entered the coordinates for this site. Metadata includes No Topo Basemap, TopoZone Pro Street Map, Black and White Aerial Photo, on a Medium Size Map, View Scale 1:10,000, Coordinate Datum NAD83. High degree of confidence in accuracy of location. |
Alyce Hughey |
| 6/11/2009 |
Institutional Control Record Established |
Institutional Controls established and entered into the database. |
Don Fritz |
| 6/11/2009 |
Cleanup Complete Determination Issued |
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, subject to the specific institutional controls (ICs) established in this Record of Decision (ROD), and no further remedial action is currently required as long as the site remains in compliance with these ICs.
ADEC Decision & Established Institutional Controls (ICs)
The ADEC has determined that there is currently no unacceptable risk to human health or the environment, and this site will be granted a Cleanup Complete with ICs determination subject to the following ICs:
1. Any future change in land use may impact the exposure assumptions cited in this document. If land use and/or ownership changes, current ICs may not be protective and ADEC may require additional remediation and/or ICs. Therefore Schlumberger Oilfield Services shall report to ADEC every five years to document land use, or report as soon as Schlumberger Oilfield Services becomes aware of any change in land ownership and/or use, if earlier. The report can be sent to our ADEC office or electronically to DEC.ICUnit@alaska.gov. The attached Cleanup Complete with ICs Agreement Signature Page must be signed by an authorized Schlumberger Oilfield Services’ staff and returned to this office within 30 days of the receipt of this Record of Decision document.
2. Water wells may not be installed on this property without the written approval of the ADEC.
3. Groundwater monitoring in accordance with an ADEC approved plan is required until the groundwater quality meets the applicable cleanup levels established for this site. If ADEC determines monitor wells are no longer needed, the monitor wells must be properly decommissioned in accordance with applicable ADEC requirements.
4. Prior ADEC approval must be obtained for any excavation, transport, movement, remediation, and/or disposal of the landspread soils, and for soil remaining in the vicinity of the source areas. This IC is consistent with the requirements of 18 AAC 75.325 (i), 18 AAC 75.360, and 18 AAC 75.370 (b).
RP advised that the movement or use of contaminated material in a manner that results in a violation of 18 AAC 70 water quality standards is prohibited.
RP requested to have their consultant develop a groundwater monitoring work plan for our review that allows for groundwater monitoring on a five year or shorter schedule.
|
Don Fritz |
| 11/16/2011 |
Update or Other Action |
Site transferred from Don Fritz to Peter Campbell per Paul Horwath. |
Alyce Hughey |
| 1/21/2014 |
Document, Report, or Work plan Review - other |
Peter Campbell approved the Groundwater Monitoring Sampling and analysis Plan, Former Dowell Schlumberger Facility, Kenai, Alaska, dated December 10, 2013, prepared by CHWM HILL for groundwater sampling of MW-2 for purposes of monitoring the groundwater for tetrachloroethylene (PCE). |
Alyce Hughey |
| 9/26/2014 |
Document, Report, or Work plan Review - other |
Reviewed the 2014 Groundwater Monitoring Report for the remaining well, (MW-2). |
Peter Campbell |
| 9/26/2014 |
Document, Report, or Work plan Review - other |
Reviewed the 2014 Groundwater Monitoring Report prepared by CH2MHIll. PCE concentrations are trending downward but still above cleanup levels at 12 ppb. the consultant has recommended treating the groundwater in this well with hydrogen release compound. |
Peter Campbell |
| 9/29/2014 |
Update or Other Action |
Letter to Schlumberger requesting work plan and additional monitoring well(s) for the proposed hydrogen release compound remediation activity. |
Peter Campbell |
| 2/16/2016 |
Document, Report, or Work plan Review - other |
Reviewed the 2015 Groundwater Monitoring Report. There was no action on the 2014 proposal for using hydrogen release compound. The consultant has recommended delaying sampling until 2017. ADEC has no objection to this. Also advised the site owner that cleanup levels for PCE could be changing from 5 ug/l to 40.6 ug/l. |
Peter Campbell |
| 7/26/2017 |
Document, Report, or Work plan Review - other |
With the change in cleanup levels for PCE, the site can now have the institutional controls lifted. A work plan has been submitted for the decommissioning and removal of the monitoring wells. The work plan has been approved. |
Peter Campbell |
| 12/14/2017 |
Institutional Control Record Removed |
In 2016 the groundwater cleanup level for tetrachloroethylene changed from 5 ug/l to 41 ug/l. Monitoring well MW-2 was the last well with tetrachloroethylene exceeding 5 ug/l, with concentrations detected at 13 ug/l in 2015. The concentration is now less than the current ADEC groundwater cleanup level. All remaining groundwater monitoring wells were decommissioned in 2017.
Soil and groundwater contamination at the site have been cleaned up to concentrations below the approved cleanup levels suitable for residential land use. This site will receive a “Cleanup Complete” designation subject to the following standard conditions.
1. Any proposal to transport soil or groundwater off-site requires ADEC approval in accordance with 18 AAC 75.325(i). A “site” as defined by 18 AAC 75.990 (115) means an area that is contaminated, including areas contaminated by the migration of hazardous substances from a source area, regardless of property ownership.
2. Movement or use of contaminated material in a manner that results in a violation of 18 AAC 70 water quality standards is prohibited.
3. Groundwater throughout Alaska is protected for use as a water supply for drinking, culinary and food processing, agriculture including irrigation and stock watering, aquaculture, and industrial use. Contaminated site cleanup complete determinations are based on groundwater being considered a potential drinking water source. In the event that groundwater from this site is to be used for other purposes in the future, such as aquaculture, additional testing and treatment may be required to ensure the water is suitable for its intended use.
This determination is in accordance with 18 AAC 75.380 and does not preclude ADEC from requiring additional assessment and/or cleanup action if future information indicates that contaminants at this site may pose an unacceptable risk to human health, safety, or welfare or to the environment.
|
Peter Campbell |
