| Action Date |
Action |
Description |
DEC Staff |
| 9/3/1987 |
Release Investigation |
SI; Hart Crowser drilled and sampled six bore holes. Sample from boring 10-P-4 had 160 ppm benzene, 3950 ppm BTEX. ADEC received portions of the report 8/2/89. |
Former Staff |
| 8/28/1989 |
Update or Other Action |
REM; Mapco contractor was in the process of demolishing previous station on 8/28/89; three USTs removed; 1,522 tons of contaminated soils were moved off site and stockpiled at AS&G. |
Former Staff |
| 9/6/1989 |
Leaking Underground Storage Tank Release Confirmed - Petroleum |
LUST Site created in CSP for source area ID 77672 ADD; |
Former Staff |
| 9/6/1989 |
Site Added to Database |
|
Former Staff |
| 9/7/1989 |
Leaking Underground Storage Tank Cleanup Initiated - Petroleum |
LCAU; :LCAU Date changed DB conversion |
Former Staff |
| 9/8/1989 |
Leaking Underground Storage Tank Corrective Action Underway |
RAPR; Hart Crowser submits a site assessment plan for UST removal, reconstruction and a plan for identifying the vertical and lateral extent of contamination and remediation. Remediation investigation work plan resubmitted 9/14/89. Included installation of vapor extraction system. ADEC accepted the work plan 10/20/89. Calls for quarterly sampling of monitoring wells. |
Former Staff |
| 9/11/1989 |
Underground Storage Tank Site Characterization or Assessment |
PA; Water well survey within 1/4 mile upgradient and 1/2 mile downgradient. Active downgradient Municipal well. |
Former Staff |
| 9/20/1989 |
Release Investigation |
SI; Hart Crowser report; groundwater 40 to 43 feet below the surface and flows towards the north to NW. No floating product. Groundwater sample MW-1 taken on 1/8/90 had 13.0 ppm benzene. Soil sample BH2A/S5, taken on 9/20/89 from below the former pump island had 1.6 ppm benzene, 691.6 ppm BTEX and 2,900 ppm TPH. |
Former Staff |
| 3/20/1990 |
Update or Other Action |
F; Public notice for operating vapor extraction system placed in Anchorage Times. Comments accepted from public by ADEC until 4/15/90. Notice to be run for 3 consecutive weeks. |
Former Staff |
| 3/27/1990 |
Leaking Underground Storage Tank Corrective Action Underway |
RAPR; Hart Crowser work plan for establishing the extent of off-site soil and groundwater contamination. Resubmitted 4/19; ADEC approved 5/1/90. |
Former Staff |
| 4/14/1990 |
Update or Other Action |
F; Vapor extraction system began operation. Quarterly reports will be submitted beginning 5/15/90. Operation problems due to "faulty" explosive gas sensor. Hart Crowser 1st quarterly report on 7/31 states system down 4/14 through 6/30/90. Intermittant through 6/12. Gas sensor fixed 7/21/90. |
Former Staff |
| 8/1/1990 |
Release Investigation |
SI; Additional site characterization/Quarterly report by Hart Crowser; 0.20 feet of floating product measured in MW5 on 9/12/90; a sample from MW1 on 9/12/90 had 2.74 ppm benzene, 39.56 ppm BTEX. Soil samples from wells 4 & 5 contained detectable levels of BTEX with the highest level at 17.985 ppm. TPH was detected in all soil samples analyzed. |
Former Staff |
| 12/4/1990 |
Update or Other Action |
F; Letter to Mapco requesting written details regarding the Toxgard monitor in the vapor extraction building being adjusted upward to 50% lower explosive limit from 20%. Also need to send a plan for groundwater remediation plan. |
Former Staff |
| 12/5/1990 |
Update or Other Action |
F; Letter received from contractor with information on vapor extraction system shutdowns and Toxgard setting. |
Former Staff |
| 1/4/1991 |
Leaking Underground Storage Tank Corrective Action Underway |
RAPR; Hartcrowser sent groundwater remediation plan. Air stripping currently the best option for removing volatiles from groundwater combined with discharging treated water to sanitary sewer system. Allowable air discharge from air stripping option to be PEL 8 hr. limit on site & off site 8 hr. limit divided by 100. PEL=permissable exposure limit set by OSHA. |
Former Staff |
| 1/31/1991 |
Long Term Monitoring Established |
MS; Hartcrowser sent quarterly water sampling results. Well 5 had free floating product which ranged from .01 ft.(10/22/90) to .20 ft.(12/20/90). This well also had a TPH level of 112 ppm & .076 ppm of 1,2 dichlorethane(12/20/90). |
Former Staff |
| 4/1/1991 |
Update or Other Action |
F; Hart Crowser sent in vapor extraction system quarterly report covering period from 4/1/91 to 7/31/91. Discharge levels in % lower explosive limit over time is decreasing & as of 7/1/91 approximately 8,709# or 1,452 gallons of hydrocarbons were recovered from the system. Combined flow discharge levels is at 2.29 ppm with total BTEX at 93.4 ppm. |
Former Staff |
| 4/12/1991 |
Leaking Underground Storage Tank Corrective Action Underway |
RAPR; Approval of workplan for revised groundwater remediation plan sent by Mapco granted with provisions. Send an interim report containing; analyutical results from soil/water samples collected during drilling, installation & monitoring of the wells, results & conclusions frm aquifer testing be sent withing 45 days, final design plans be sent for review & approval within 60 days of well installation. |
Former Staff |
| 4/26/1991 |
Leaking Underground Storage Tank Corrective Action Underway |
CAPR; ADEC approved the ground water remedial action plan (soil vapor extraction system has been operational). |
Former Staff |
| 9/3/1991 |
Update or Other Action |
CORR; On September 3rd Mapco requested an extension of the proposed startup date for the groundwater treatment system, until January 1992. The department approved the extension on September 6, 1991. |
Former Staff |
| 1/5/1993 |
Leaking Underground Storage Tank Corrective Action Underway |
LCAR; Groundwater pump & treat system shut down for exceeding AWWU effluent levels. Consultant is considering options to bring system into compliance. |
Former Staff |
| 8/30/1994 |
Leaking Underground Storage Tank Corrective Action Underway |
LCAR; |
Former Staff |
| 10/22/1994 |
Leaking Underground Storage Tank Corrective Action Underway |
LCAR; Performed a Corrective Action Report review. |
Former Staff |
| 11/21/1994 |
Leaking Underground Storage Tank Corrective Action Underway |
LCAR; Review monitoring well report. |
Former Staff |
| 2/7/1995 |
Leaking Underground Storage Tank Corrective Action Underway |
LCAR; Reviewed report. |
Former Staff |
| 3/18/1995 |
Leaking Underground Storage Tank Corrective Action Underway |
LCAR; Reviewed quarterly reports. |
Former Staff |
| 7/25/1995 |
Update or Other Action |
CAPR; Met with RP to discuss status of site. |
Former Staff |
| 8/15/1995 |
Leaking Underground Storage Tank Corrective Action Underway |
LCAR; Reviewed quarterly monitor well report required by COBC. |
Former Staff |
| 9/15/1995 |
Update or Other Action |
CAPR; Reviewed files. |
Former Staff |
| 11/20/1997 |
Update or Other Action |
ADEC sends Notification of Intent to Cost Recover Letter to Current Owner: MAPCO EXPRESS INC |
Former Staff |
| 4/26/2001 |
Update or Other Action |
Matt Hemry, Shannon & Wilson, informed the STP of a release at this site near the back fence. Details are sketchy. See new Event ID. |
Lynne Bush |
| 9/17/2001 |
Update or Other Action |
Changed ADEC Project Manager from Bush to Wiegers |
Cynthia Pring-Ham |
| 7/11/2002 |
Update or Other Action |
Landowner calls to request that he be copied on correspondence from DEC. |
Janice Wiegers |
| 11/5/2002 |
Document, Report, or Work plan Review - other |
Fall monitoring report submitted. Four wells were sampled. The highest benzene concentration was detected in MW-4 (310 ppb). BTEX levels have increased in both MW-4 and SVX-2. |
Janice Wiegers |
| 12/13/2002 |
Update or Other Action |
Tank closure assessment report submitted. 300-gallon heating oil tank found and removed during repair of a broken water main along East 5th Avenue. No piping was observed with the tank. Wood and metal debris also excavated and may have been associated with a septic crib. Final excavation was 6.5 to 8.5 feet deep. Soil samples analyzed for BTEX, GRO, DRO, RRO, PAHs, and UST metals. Benzne (0.038 mg/kg) and chromium (32.7 mg/kg) were detected above cleanup levels. 75 cubic yards of soil were disposed of at the Anchorage Municipal landfill. Site opened in CS database (see 2100.38.027). |
Janice Wiegers |
| 2/21/2003 |
Update or Other Action |
Due to observed problems at the Veeder-Root access at several Williams stations, soil screening samples were collected from soil in the manway in 2001. Headspace results exceeded 1,000 ppm at this station. Migration to groundwater will be evaluated through existing wells. |
Janice Wiegers |
| 3/11/2003 |
Update or Other Action |
Per J.Wiegers, change file number from L30.10 to 2100.26.025 |
Wendy Uzzell |
| 6/19/2003 |
Document, Report, or Work plan Review - other |
Spring remediation and monitoring report submitted. Hydrocarbon levels in exhaust have remained low for several years. Maximum benzene concentrations were observed in the off-site well MW-4 (100 ppb). This well has contained elevated levels since 2000. An additional source along 5th Avenue is possible as much debris (partly aircraft debris) has been observed in the subsurface. Rebound test proposed for system with follow-up quarterly groundwater monitoring. |
Janice Wiegers |
| 10/10/2003 |
Update or Other Action |
ADEC approves shutdown of system of system for treatment effectiveness and rebound evaluation. |
Janice Wiegers |
| 10/10/2003 |
Document, Report, or Work plan Review - other |
Request for temporary remediation shutdown approved. Potential rebound and contaminants observed in the off-site well MW-4 will be evaluated. |
Janice Wiegers |
| 11/14/2003 |
Document, Report, or Work plan Review - other |
Groundwater monitoring report submitted. System shut down on October 29. Vapor monitoring of the system exhaust detected benzene and GRO, which has not been detected since 1999/2000. Benzene exceeded groundwater cleanup levels in SVX-2 (14 ppb). MW-4 contained low levels of ethylbenzene and xylenes. The potential for other sources along 5th Ave. is being evaluated. |
Janice Wiegers |
| 3/19/2004 |
Document, Report, or Work plan Review - other |
Workplan for lead scavenger sampling approved. EDB will be analyzed with EPA method 8260. Further evaluation with a method with a lower detection limit may be conducted in future sampling events. |
Janice Wiegers |
| 9/7/2004 |
Leaking Underground Storage Tank Corrective Action Underway |
On 07 July 2004, Bush met with Holiday representative Bruce Anthony; Williams Express representative Terrie Blackburn; and Shannon & Wilson representatives Matt Hemry, Ben Heaver, and Tim Terry. The topic of discussions was plans for future activities at all former Williams Express Stations. |
Lynne Bush |
| 9/8/2004 |
Leaking Underground Storage Tank Corrective Action Underway |
Holiday will be assuming responsibility for investigative and remediation activities at all former Williams Express Stores, but legal responsibility is divided by store. Holiday has renumbered their stores as: 5001=601; 5002=602; 5005=605; 5005=605; 5006=606; 5007=607; 5008=608; 5010=610; 5014=614; 5016=616; 5018=618; 5024=624; 5025=625; 5030=630; 5031=631; 5050=650.
While Holiday will oversee the work at the former Williams’ stations, these sites remain the responsibility of Williams. The numbers of these sites remain the same: 5003; 5004; 5009; 5012; 5015; 5017; 5021; and 5034. |
Lynne Bush |
| 5/9/2006 |
Update or Other Action |
Project management transferred from Bush to O'Connell. |
Aggie Blandford |
| 5/12/2006 |
Document, Report, or Work plan Review - other |
Received April to December 2005 monitoring report. Benzene above Table C in MW-1 and MW-4. |
Bill O'Connell |
| 3/16/2007 |
Exposure Tracking Model Ranking |
|
Former Staff |
| 6/5/2007 |
Document, Report, or Work plan Review - other |
Received 2006 annual monitoring report. Benzene remained above Table C in MW-1 and MW-4, DRO above Table C in MW-2 and SVX-2. QA/QC conducted. |
Bill O'Connell |
| 2/22/2008 |
Update or Other Action |
Received Petition for Conditional Closure. |
Keather McLoone |
| 3/5/2008 |
Conditional Closure Approved |
|
Former Staff |
| 3/5/2008 |
Institutional Control Record Established |
ADEC has determined that the cleanup actions employed at the HSS No. 610 facility were effective in removing a majority of the contaminant source material. The UST system was upgraded to prevent further releases, much of the contaminated soil was excavated, and an air sparge/vapor extraction system was installed and operated for several years. 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 and no further remedial action is required at HSS No. 610.
This determination is subject to the following conditions:
1. An institutional control will be recorded on the ADEC database that identifies the nature and extent of the contamination remaining on the site.
2. ADEC approval is required prior to off site transport of soil or groundwater in accordance with 18 AAC 78.274(b).
3. The aboveground components of the remediation system, the vapor extraction wells, and the air sparge wells shall be decommissioned in accordance with accepted practices and a work plan approved by ADEC.
4. Samples shall be collected from MW-1, MW-2, SVX-2, and MW-4 and analyzed for BTEX according to the approved ADEC plan in the spring of 2008. Status of future monitoring will be determined after the results of the next monitoring event are available.
5. Any monitoring wells that are not needed for future monitoring shall be decommissioned in accordance with an ADEC approved work plan.
6. Groundwater wells will not be installed on this property without prior approval from ADEC.
7. A deed notice (Notice of Environmental Contamination) shall be recorded in the State Recorder’s Office that identifies the nature and extent of contamination at the property and any conditions that the owners and operators are subject to in accordance with this decision document. A copy of the recorded notice shall be provided to ADEC within thirty (30) days of its recordation. |
Keather McLoone |
| 3/5/2008 |
Institutional Control Record Established |
Notice of remaining contamination - soil contaminated with GRO, DRO, and BTEX was found in the former tank excavations and during tank upgrades above the ADEC Tables B1 and B2 cleanup levels. Benzene in groundwater above Table C remains at on-site MW-1 and off-site MW-4. |
Keather McLoone |
| 4/29/2008 |
Update or Other Action |
Notice of Environmental Contamination received as recorded and signed by Holiday. |
Keather McLoone |
| 6/17/2008 |
Document, Report, or Work plan Review - other |
Date of receipt of electronic report on 2007 and early 2008 work at HSS 610. Review included laboratory checklists. MW1 contained benzene levels above Table C during the two 2007 events but dropped below Table C in the April 2008 event. MW4 bezene levels were above Table C in all three events. S&W recommends continued monitoring at MW1 and MW4 during the fall of 2008 and 2009. Further recommendations are that the other wells and VEAIS components be decommissioned. |
Keather McLoone |
| 9/5/2008 |
Update or Other Action |
Approval via email of 2007 report recommendation to discontinue sampling at MW-2 and SVX-2. |
Keather McLoone |
| 9/17/2008 |
Update or Other Action |
Receipt of Work Plan for Monitoring Well and Remediation System Decommissioning. Intent is to remove environmental shed and decommissioning of 1 monitoring well, one former vapor extraction well recently used as a monitoring well, another vapor extraction well, a groundwater recovery well and a pilot test injection well according to ADEC practices. |
Keather McLoone |
| 4/24/2009 |
Long Term Monitoring Complete |
Receipt of September 2008 Groundwater Monitoring. April 2008 data and laboratory review checklist was submitted previously with 2007 report. Concentrations in onsite MW-1 below Table C for both events. Benzene was 0.00972 mg/L in April 2008 at MW-4, but this well was likely destroyed after that event due to demolition and resurfacing activities at this adjacent property location. There are other downgradient potential sources of contamination. Also, at this time, it would not make sense to reinstall this adjacent property well due to the likelihood of further site construction activities. Email sent on this date approving this change to the Conditional Closure with ICs requirements with a letter sent via postal service on 4/27/09 to further document. |
Keather McLoone |
| 5/21/2009 |
Update or Other Action |
Receipt of signature page stating that Holiday agrees to the terms of the conditional closure. |
Keather McLoone |
| 5/21/2009 |
Document, Report, or Work plan Review - other |
Review of Monitoring Well and Remediation System Decommissioning at Holiday Station Store 610 letter report. One groundwater well (MW-2), one vapor extraction (VES) well (SVX-2), one recovery well (RW-1), and the remaining aboveground components of the remediation system were decommissioned on November 17, 2008 and on January 7, 2009. VES well SVX-1, pilot test injection well IW-1, and the AIS wells will be decommissioned during 2009 efforts. |
Keather McLoone |
| 6/17/2009 |
Document, Report, or Work plan Review - other |
Review of Work Plan for Monitoring Well Decommissioning at Holiday Station Store 610. Plan stated that monitoring well MW-1, vapor extraction well SVX-1, pilot test injection well IW-1, and 10 air injection wells will be decommissioned. |
Keather McLoone |
| 9/15/2009 |
Document, Report, or Work plan Review - other |
Monitoring Well and Air Injection Well Decommissioning report received September 14, 2009. MW-1 and ten air injection wells were decommissioned on June 26, 2009. VES well SVX-1 could not be located and appeared to have been decommissioned previously. Pilot test injection well IW-1 was also not located during this effort. |
Keather McLoone |
| 10/15/2009 |
Update or Other Action |
Letter sent to document approval of decommissioning report. |
Keather McLoone |
| 12/28/2009 |
Site Visit |
Site visit to observe excavation activities - installing electrical conduit for electrical reader boards in area of subsurface VES piping etc. No release was later reported. |
Keather McLoone |
| 12/1/2011 |
Update or Other Action |
The current project manager chose to retain management of this site with the Cleanup Complete Determination that has Institutional Controls. |
Kristin Thompson |
| 4/20/2012 |
Update or Other Action |
Date of receipt of letter from S&W on behalf of Holiday requesting Removal from Compliance Order by Consent for this site. |
Keather McLoone |
| 7/24/2012 |
Update or Other Action |
Issued a letter to remove Holiday Station Store #610 from the 1991 Compliance Order By Consent (COBC), after its verbiage was approved by DOL (Breck Tostevin). |
Richard Bernhardt |
| 12/2/2015 |
Institutional Control Compliance Review |
IC compliance review conducted, groundwater monitoring requirements removed in the database record since the long term monitoring was completed in 2009, staff name changed from Nuechterlein to IC Unit, and the reminder system was set to send an IC reminder letter to the landowner in 2017. There is an associated site in our records that is on the same property which is hazard ID 22998. Remove the ICs from this site so that we can track the site information in one site record only to avoid confusion. |
Evonne Reese |
| 12/3/2015 |
Institutional Control Record Removed |
As an administrative action the IC record will be removed from this site and the IC compliance and tracking will be done in the associated site located on the same property which is hazard ID 22998. |
Evonne Reese |
