| Action Date |
Action |
Description |
DEC Staff |
| 6/1/1988 |
Update or Other Action |
REM; In June 1988, four USTs (regular, unleaded, super, and diesel) were removed. Contaminated soil was excavated and stockpiled until no odor or visual signs of contamination were detected by R. Godden of ADEC. |
Former Staff |
| 8/2/1988 |
Site Visit |
FI; K. Murray of NTL collected a composite soil sample from stockpiled soils. Results indicated trace levels of BTEX, no PCBs, and trace levels of lead. |
Former Staff |
| 12/8/1989 |
Site Added to Database |
|
Former Staff |
| 12/8/1989 |
Leaking Underground Storage Tank Release Confirmed - Petroleum |
LUST Site created in CSP for source area ID 77786 ADD; |
Former Staff |
| 12/9/1989 |
Update or Other Action |
NOR; :Action Date changed DB conversion 1/11/11 |
Former Staff |
| 12/9/1989 |
Leaking Underground Storage Tank Cleanup Initiated - Petroleum |
LCAU; :LCAU Date changed DB conversion |
Former Staff |
| 12/9/1989 |
Update or Other Action |
CAPR; :Action Date changed DB conversion 1/11/11 |
Former Staff |
| 12/9/1989 |
Release Investigation |
RELR; :Action Date changed DB conversion 1/11/11 |
Former Staff |
| 1/3/1990 |
Update or Other Action |
Monica English sent a letter requesting information regarding cleanup conducted for the UST closures. |
Alyce Hughey |
| 1/22/1990 |
Leaking Underground Storage Tank Corrective Action Underway |
RAPR; Site assessment, cleanup plans, and disposal plans submitted by Shannon & Wilson on 1/22/90 and approved on 5/11/90. |
Former Staff |
| 3/6/1990 |
Underground Storage Tank Site Characterization or Assessment |
Monica English sent a letter requesting a detailed assessment and sampling plan for the site, due to the distinct possibility exists of leachate contamination resulting from aeration techniques and lack of proper soil storage. |
Alyce Hughey |
| 4/6/1990 |
Document, Report, or Work plan Review - other |
Monica English sent a review comments letter after reviewing the Contamination Assessment Plan Texaco Service Station Sites Homer & Soldotna, from Shannon & Wilson, dated February 1990. |
Alyce Hughey |
| 5/11/1990 |
Underground Storage Tank Site Characterization or Assessment |
Monica English sent an approval letter for the Contamination Assessment Plan after reviewing the Revised Contamination Assessment Plan from Shannon & Wilson, dated May 1990. |
Alyce Hughey |
| 5/13/1990 |
Site Visit |
FI; 10 composite soil samples obtained from and adjacent to the stockpile on 5/13/90 by Shannon & Wilson. 9 of the 10 samples had TPH greater that 100 ppm and ranged from 38 to 14,000 ppm. All samples showed trace or non-detectable levels of total BTEX, halogenated organic volatiles, arsenic chromium, and lead. A report addressing cleanup options was submitted to ADEC on 8/31/90. |
Former Staff |
| 6/24/1991 |
Release Investigation |
SI; Bio-engineering of AK found depth to groundwater to be 13' Benzene from boring D-2 was highest at 3080 ppm & total BTEX of 15,190 ppm. Depth of D-2 was 12.5' to 14' |
Former Staff |
| 12/4/1991 |
Update or Other Action |
Monica English sent a Notice of Release letter after reviewing the Sub-Surface Site Investigation, from Bio-Engineering, dated June 1991. |
Alyce Hughey |
| 3/1/1992 |
Leaking Underground Storage Tank Corrective Action Underway |
LCAR; A workplan was submitted for the assessment of contaminated soils and groundwater at this site. DEC will review and respond. |
Former Staff |
| 5/19/1992 |
Underground Storage Tank Site Characterization or Assessment |
Monica English sent an approval letter for the Groundwater Assessment Workplan, from Shannon & Wilson, dated August 1992. |
Alyce Hughey |
| 11/24/1993 |
Leaking Underground Storage Tank Corrective Action Underway |
Monica English sent a letter requesting a Corrective Action Plan. |
Alyce Hughey |
| 2/4/1994 |
Leaking Underground Storage Tank Corrective Action Underway |
Monica English sent a letter with review comments after reviewing the Corrective Action Plan from Shannon & Wilson, dated January 4, 1994. |
Alyce Hughey |
| 2/28/1994 |
Leaking Underground Storage Tank Corrective Action Underway |
Monica English sent an approval letter for the Revised Corrective Action Plan from Shannon & Wilson, dated February 18, 1994. |
Alyce Hughey |
| 11/25/1994 |
Leaking Underground Storage Tank Corrective Action Underway |
Monica English sent a Review Comments letter after reviewing the Corrective Action Plan, from Shannon & Wilson, dated June 1994. |
Alyce Hughey |
| 1/17/1995 |
Site Visit |
FI; Departmental staff conducted a site investigation to investigate a complaint that contaminated soils were being removed from the site. |
Former Staff |
| 1/19/1995 |
Leaking Underground Storage Tank Emergency Response |
IA; A site inspection was conducted to verify a complaint that contaminated soils were being removed from the site without departmental approval. A letter indicating the results of the field investigation was sent to the RP. STAP site. |
Former Staff |
| 4/6/1995 |
Site Visit |
FI; Departmental staff travelled to the site to inspect a stockpile of contaminated soil. A water collection system has been built into the stockpile and water was being drummed for analytical testing. Upon receipt of analytical results, a determination will be made for disposal. |
Former Staff |
| 12/23/1996 |
Leaking Underground Storage Tank Corrective Action Underway |
CAPA; Departmental staff reviewed and approved a Corrective Action plan that was submitted for purposes of extending a financial assistance grant for the remediation of a LUST site. |
Former Staff |
| 11/20/1997 |
Update or Other Action |
ADEC sends Notification of Intent to Cost Recover Letter to Current Owner: TESORO ALASKA PETROLEUM CO |
Former Staff |
| 9/29/1998 |
Update or Other Action |
Paul Horwath sent a letter requesting for Further Groundwater Contamination Delineation, based on the high BTEX, GRO, and DRO detected in monitoring well B4MW. |
Alyce Hughey |
| 4/30/1999 |
Update or Other Action |
Colin Basye sent a letter discussing several options that may be worthwhile to incorporate into the Workplan for the installation of an additional monitor well. |
Alyce Hughey |
| 5/21/2002 |
Update or Other Action |
Updated GIS information. Accuracy Information (for those who want it):
Method: MAP INTERPOLATION - Kenai Peninsula Borough Tax Parcels Map 1999
Scale of Source: approximately 1:24,000
Datum: Nad27
Accuracy: Approx 500 meters (some may be better but I wouldn't claim better accuracy without seeing the physical site files and double-checking to see if the locations were on the correct tax parcel) |
Cynthia Pring-Ham |
| 5/31/2002 |
Update or Other Action |
KDO is reviewing a work plan for testing and subsequent disposal of the contaminated soil. |
David Allen |
| 10/1/2004 |
Update or Other Action |
File number assigned and entered into the Fileroom DB and LUST DB. |
Alyce Hughey |
| 8/14/2006 |
Document, Report, or Work plan Review - other |
Groundwater quality monitoring reports and site status reports, prepared by Kent & Sullivan, were reviewed by ADEC. The reports dated from 2000 to 2006. Tesoro ceased operating the soil vapor extraction system in 2000, however the groundwater air sparge system has been operated more or less continuously since 2000. Groundwater quality monitoring reports demonstrated a declining trend in groundwater contaminant concentrations. Tesoro plans to continue to operate the air sparge groundwater treatment and conduct twice/year groundwater monitoring until the groundwater meets ADEC cleanup levels in all of their groundwater monitoring wells. |
Paul Horwath |
| 3/28/2007 |
Exposure Tracking Model Ranking |
Initial ETM ranking completed. |
Paul Horwath |
| 10/10/2007 |
Document, Report, or Work plan Review - other |
ADEC reviewed Kent & Sullivan's November 2006 Groundwater Monitoring Report, Tesoro north Store #207, prepared for the Tesoro Alaska Company. Four MWs were sampled. One of the wells showed an increasing concentration of petroleum. Data for the other three wells was consistent with prior sample data. Tesoro continues to operate an air sparge groundwater treatment system at this site, and groundwater concentrations are displaying a diminishing trend. P. Horwath |
Paul Horwath |
| 2/12/2008 |
Leaking Underground Storage Tank Corrective Action Underway |
Reviewed the 2007 Groundwater Monitoring Report, Tesoro North Store #207, prepared by Kent & Sullivan, Incorporated. This report included a work plan for calendar year 2008, which was conditionally approved. Groundwater quality continues to improve. Tesoro will not operate the treatment systems this year in order to see if groundwater quality will stabilize below ADEC cleanup levels without active treatment. |
Paul Horwath |
| 3/25/2009 |
Document, Report, or Work plan Review - other |
Reviewed the 2008 Groundwater Monitoring Report, Tesoro Northstore #207, dated March 4, 2009, from Kent & Sullivan, Inc. for Paul Horwath and provided him a summary for his review and oversight. Site conditions remain stable. The results of the 2008 monitoring and rebounding showed that monitored wells experienced a rebound during the spring monitoring event. All monitored wells except for one well (B7MW) returned to a downward trend or non-detect by the fall monitoring event, with contaminant concentrations in all monitored wells remaining below the groundwater cleanup levels for two years. Groundwater monitoring will continue during 2009, and if the spring data does not exceed the groundwater cleanup levels, a closure report will be submitted to ADEC for approval. |
Alyce Hughey |
| 7/21/2010 |
Document, Report, or Work plan Review - other |
Reviewed the 2009 Groundwater Monitoring Report, from Kent & Sullivan, dated June 9, 2010 for Paul Horwath. The results of the 2009 groundwater monitoring after the air sparge system was shut down in February of 2008 showed an increase in Benzene within one of the monitoring wells sampled B7MW at 0.00667 mg/L in April and then a decrease in August detecting 0.00109 mg/L. Other than the Benzene detected in April of 2009 all the groundwater sample results have remained below the groundwater cleanup levels since November of 2006. Tesoro is requesting for the discontinuing and decommissioning of the groundwater remediation and monitoring wells, the advancement of one borehole adjacent to monitoring well B7MW to collect soil sample data at 4, 8, and 12 feet below ground surface, and submit a site closure report for the site. |
Alyce Hughey |
| 3/18/2011 |
Document, Report, or Work plan Review - other |
Reviewed the Site Closure Activities Report, dated February 1, 2011, from Kent & Sullivan. On September 30, 2010 the existing monitoring wells and remediation systems were decommissioned in accordance to the ADEC’s Monitoring Well Guidance, dated February 2009. On October 1, 2010 one soil boring was advanced to a total depth of 13 feet below ground surface within the area of the known historical source area and soil samples were collected at four foot intervals. Soil sample results detected benzene above the migration to groundwater cleanup levels at 4, 8 and 12 feet below ground surface, and the ethylbenzene soil sample taken at 8 feet below ground surface was detected above the migration to groundwater cleanup levels, indicating that hydrocarbon soil contamination does remain at the site in the area of the known historical source area. Groundwater sample results taken to date indicate that the groundwater has been remediated and meets the ADEC groundwater cleanup levels. |
Alyce Hughey |
| 3/21/2011 |
Update or Other Action |
LUST site created in CSP database for source area Former USTs, 79061 |
Paul Horwath |
| 3/21/2011 |
Exposure Tracking Model Ranking |
A new updated ranking with ETM has been completed for source area 77786 Former USTs. |
Paul Horwath |
| 4/7/2011 |
Cleanup Complete Determination Issued |
A Corrective Action Complete determination was issued via an April 7, 2011 Decision Document, from ADEC's Paul Horwath to the Tworo Alaska Company's Peter Ribbens. |
Paul Horwath |
