| Action Date |
Action |
Description |
DEC Staff |
| 12/16/1993 |
Site Added to Database |
|
Former Staff |
| 12/16/1993 |
Leaking Underground Storage Tank Release Confirmed - Petroleum |
LUST Site created in CSP for source area ID 77680 Gasoline contamination found beneath fuel dispenser #3 (gasoline). |
Former Staff |
| 4/21/1994 |
Leaking Underground Storage Tank Cleanup Initiated - Petroleum |
130 cubic yards of contaminated soil was excavated during the removal of the 4 tanks and associated piping. Two new tanks were installed along with new piping. |
Former Staff |
| 4/24/1994 |
Underground Storage Tank Site Characterization or Assessment |
Diesel and gasoline contamination was encountered during the tank and piping removal. 15 cubic yards of diesel and 115 cubic yards of gasoline contaminated soil was removed and stockpiled on the north side of the property. The soil was excavated to 10 to 12 feet below ground surface where groundwater was encountered. Up to 3.32 mg/kg benzene, 26.7 mg/kg GRO, and 8.35 mg/kg DRO soil contamination remain. The most contaminated area (dispenser #3) did not have a confirmation soil sample collected but did have a groundwater sample of 15.5 mg/l benzene. (Note: The groundwater sample collected under dispenser#3 appears to have been collected directly from the excavation, not from a monitoring well, and is likely biased high). |
Former Staff |
| 6/1/1994 |
Release Investigation |
Three monitoring wells were installed. |
Former Staff |
| 7/12/1994 |
Update or Other Action |
ADEC letter requesting quarterly groundwater monitoring of the three monitoring wells and the on property drinking water well. The on property passive aeration of the contaminated stockpiles is approved. |
Robert Weimer |
| 8/16/1995 |
Document, Report, or Work plan Review - other |
June 6, 1995 groundwater monitoring event. Up to 9,240 ug/l benzene (5 ug/l cleanup level) in the groundwater. |
Robert Weimer |
| 9/27/1995 |
Document, Report, or Work plan Review - other |
Reviewed a soil remediation and groundwater sampling report. Quarterly groundwater sampling does not appear to have occurred. This sampling schedule needs to be adhered to in the future. |
Former Staff |
| 10/11/1995 |
Leaking Underground Storage Tank Corrective Action Underway |
Reviewed a soil remediation plan for the on property stockpiles. The department approves the thermal treatment at CleanSoils or at any other department-approved thermal treatment facility. |
Former Staff |
| 1/16/1996 |
Document, Report, or Work plan Review - other |
December 8, 1995 groundwater monitoring event. Up to 6,500 ug/l benzene (5 ug/l cleanup level) in the groundwater. |
Robert Weimer |
| 1/24/1996 |
Document, Report, or Work plan Review - other |
Reviewed a groundwater monitoring report. Still significant benzene in the groundwater in the vicinity of monitoring wells #2 and #3, and benzene levels in well #1 remain above acceptable levels. Groundwater remediation appears to be needed. Plume delineation is needed. Drinking water well needs to be sampled by 2/26/96. |
Former Staff |
| 1/24/1996 |
Update or Other Action |
ADEC letter requesting groundwater treatment, defining the extent of the groundwater contamination, and sampling of the on property drinking water well. |
Robert Weimer |
| 5/15/1996 |
Update or Other Action |
ADEC letter discussed plan (4/8/1996) to install 3 additional monitoring wells and use ORC socks to treat the groundwater. |
Former Staff |
| 11/20/1997 |
Update or Other Action |
ADEC sends Notification of Intent to Cost Recover Letter to Current Owner: HARRY H. ROSENCRANS |
Former Staff |
| 6/20/2005 |
Update or Other Action |
ADEC letter requesting information that was previously requested in 1996. |
Robert Weimer |
| 3/16/2006 |
Update or Other Action |
Work plan submitted for the sampling the three monitoring wells and the two closest drinking water wells. |
Robert Weimer |
| 3/21/2006 |
Update or Other Action |
File number issued 2265.26.017. |
Aggie Blandford |
| 3/21/2006 |
Update or Other Action |
Work plan approval letter sent to owner in response to plan received on 16 March 2006 via e-mail. Approval includes the following:
1. Groundwater samples will be collected from three existing monitoring wells;
a. Water level, dissolved oxygen, temperature, pH, and conductivity will be recorded;
b. Purge water will be stored on-site in a 55-gallon drum until approved for disposal;
2. Water samples will be collected from two drinking water wells, one on-site and the second on the property adjacent to the project site;
a. These samples will be collected from accessible faucets, prior to potential treatment units;
3. Five water samples and one field duplicate will be analyzed for gasoline range organics, benzene, toluene, ethylbenzene, and total xylenes;
4. A trip blank will be analyzed for benzene, toluene, ethylbenzene, and total xylenes;
5. A closed-loop monitoring well survey will be completed to establish elevations of the three monitoring wells;
6. A report summarizing data collected and interpretations of analyses will be submitted to the Department for review within forty-five (45) days of receipt of laboratory results;
a. If established levels for drinking water quality are exceeded in the drinking water wells, the Department will be informed immediately; and
b. Because the Department file on this site is incomplete, the report should provide a synopsis of all available information available from Mr. Rosencrans. |
Lynne Bush |
| 5/9/2006 |
Update or Other Action |
Project management transferred from Bush to Weimer. |
Aggie Blandford |
| 6/1/2006 |
Document, Report, or Work plan Review - other |
March 17, 2006 groundwater monitoring event. Three monitoring wells sampled (up to 4.72 ug/l benzene, and non-detect GRO). Two drinking water wells sampled (on property well and adjacent property well) and both were non-detect for BTEX and GRO. Depth to groundwater in the monitoring wells was 10.85 to 11.43 feet below ground surface. Groundwater flow direction was generally to the southwest. |
Robert Weimer |
| 6/6/2006 |
Update or Other Action |
Discussed site work needed for closure with owners rep (Loyd Reese), we need at least one more groundwater monitoring event, a work plan for collecting confirmation soil samples for the tank/dispenser benzene contamination and the used oil contamination area behind the building. If all samples meet default cleanup levels site closure could be issued. |
Robert Weimer |
| 8/17/2006 |
Update or Other Action |
Approved revised July 5, 2006 Workplan for collecting confirmation soil and groundwater samples. Three samples will be collected behind the building to assess the 1990 used oil spill. Three confirmation soil borings are to be drilled at the former tank area and near the south dispenser island. Groundwater samples are also to be collected from the three monitoring wells. |
Robert Weimer |
| 8/18/2006 |
Site Characterization Report Approved |
August 18, 2006 groundwater monitoring event. Three monitoring wells sampled (up to 1.63 ug/l benzene, and non-detect (<0.1 mg/l) GRO). The two drinking water wells sampled (on property well and adjacent property well) were not sampled. Depth to groundwater in the monitoring wells was 8.92 to 10.01 feet below ground surface. Groundwater flow direction was generally to the southwest. |
Robert Weimer |
| 9/6/2006 |
Update or Other Action |
Discussed site with RP's consultant. Groundwater sampling and surface sampling for the used oil spill were conducted recently. RP would not let them drill the soil borings as proposed in the former UST area and near the dispenser. The sampling of those areas may have to wait until the UST system is upgraded or removed. Will need to continue to do long-term groundwater monitoring until confirmation soil samples can be collected verifying that soil meets site cleanup levels. |
Robert Weimer |
| 1/9/2007 |
Update or Other Action |
Talked with RP (HR). He will have his consultant submit a copy of the report for the fall 2006 groundwater sampling. We discussed that long-term monitoring (and possibly drinking water well sampling) will be required if they are not able to collect confirmation soil samples close enough to the previously identified contaminated soil areas. He will be contacting Department of Law about paying his cost recovery. |
Robert Weimer |
| 3/5/2007 |
Exposure Tracking Model Ranking |
Site ranked on the new Exposure Tracking Model (ETM). The ETM is a new site ranking system that looks at, based on available data, the potential exposure pathways for the contamination remaining at the site. |
Robert Weimer |
| 6/10/2008 |
Document, Report, or Work plan Review - other |
On August 18, 2006 three soil samples were collected at 1 to 2 feet below ground surface behind the building. The whole area of concern behind the building could not be assessed because of the presence of tires and drums. Up to 463 mg/kg DRO, 5,180 mg/kg RRO, non-detect (<0.00791 mg/kg) benzene, non-detect (<0.0563 mg/kg) PCBs, and 10.3 mg/kg arsenic where the soil samples were collected. They did not collect GRO soil samples as required in the approved work plan. The three planned soil borings near where contamination had been documented at the UST system were not done. |
Robert Weimer |
| 7/18/2008 |
Update or Other Action |
Talked with RP's consultant. The RP will need to continue to have the groundwater and drinking water wells sampled until it is confirmed that the soil and groundwater meet default cleanup levels. |
Robert Weimer |
| 5/13/2010 |
Update or Other Action |
EPA to send letter to current operator regarding their active injection well. The shop floor drains still go to the on-site sewer system, they believe there are 2 of them on this property. |
Robert Weimer |
| 3/11/2011 |
Meeting or Teleconference Held |
Talked with current owner (Kevin Peterson). He said that EPA (Jennifer P) contacted him about assessing whether there was any contamination from the past discharge of the floor drains to the on property septic system or other on property disposal system. He said that he had plugged up the floor drains in the shop. We also discussed that there are two open contaminated sites for the property and further soil, groundwater, and drinking water sampling is required. He said he will contact the previous property owner (HR) about any work that has been done since March 2006, and who will be the lead/responsible for all of the follow up work. He said that the one drinking water well has been sampled each year but was not sure if it was sampled for petroleum. He will look into that and submit any petroleum sample results. |
Robert Weimer |
| 8/5/2011 |
Site Characterization Workplan Approved |
On August 5, 2011 EPA conditionally approved a closure plan for two motor vehicle waste disposal wells at the site. The plan calls for plugging the floor drains that discharge into the on-site septic system and collecting soil samples from the soil/water interface of the septic system to assess for petroleum contamination by methods 8260 (VOCs), 8270 (SVOCs), and for the metals (arsenic, cadmium, chromium, and lead). |
Robert Weimer |
| 12/8/2011 |
Update or Other Action |
EPA forwarded analytical results they received from the consultant who collected one soil sample from each of the two on property leach fields that had been previously hooked up to floor drains. The samples were analyzed for SVOCs, VOCs, and some metals. Up to 4.81 mg/kg Arsenic, 19.6 mg/kg Chromium, and 3.85 mg/kg Lead. SVOCs and VOCs were all non-detect at the two locations sampled. Need final report and complete copies of field notes to evaluate representativeness of the samples collected. |
Robert Weimer |
| 5/24/2013 |
Site Visit |
Site visit to observe current site conditions. |
Robert Weimer |
| 10/29/2013 |
Update or Other Action |
Talked with current owners represenative (who has just re-aquired the property), they plan to remove the existing UST system (needs to submit closure notice) and complete the assessment and cleanup of the remaining soil and groundwater contamination from the former UST system. He will provide copies of all sampling conducted since 2006, including any analysis for petroleum in the drinking water wells since 2006. DEC requested that he have his environmental firm submit a work plan for review and approval for collecting samples during the UST removal so the current USTs and past UST contamination can be assessed. The will also have a work plan submitted for the assessment of the contamiantion behind the building (CS site). |
Robert Weimer |
| 10/22/2014 |
Offsite Soil or Groundwater Disposal Approved |
Approved 10 cubic yards of gasoline contaminated soil to be disposed of at Palmer MSB Central Landfill. The soil meets the landfill standards. The soil was generated at one of the dispensers when the current UST system was removed between September 9-11, 2014. |
Robert Weimer |
| 12/14/2015 |
Update or Other Action |
Have not received the information discussed with the property owner on 10/29/2013. |
Robert Weimer |
| 12/16/2016 |
Document, Report, or Work plan Review - other |
On September 10-11, 2014 the underground storage tanks and associated piping were removed. The excavation was backfilled with the excavated material and imported fill. The sampling identified benzene contamination at the southern dispenser island (0.219 mg/kg) and the piping sample (0.0637 mg/kg) collected 5 feet north of that dispenser. The detectable PAH in the one PAH sample collected had 25.1 mg/kg DRO, and non-detect GRO and BTEX. On September 25, 2014 they returned to the site and excavated out 8.5 cubic yards of soil at the dispenser and piping area that were above cleanup levels. The base and sidewall samples collected from that excavation met cleanup levels. Up to 4.37 mg/kg GRO, 29.7 mg/kg DRO in the samples collected. The 8.5 cubic yards of contaminated soil excavated was not field screened or sampled and placed back in the excavation. No sampling was conducted behind the building where the surface spill occurred (see Knik Texaco Service, Hazard ID 968). |
Robert Weimer |
| 12/29/2017 |
Update or Other Action |
On March 1, 2017 provided copies of requested assessment reports to State of Alaska DOT for roadwork in the area. |
Robert Weimer |
| 6/10/2019 |
Exposure Tracking Model Ranking |
A new updated ranking with ETM has been completed for source area 77680 UST Contamination. |
Robert Weimer |
| 7/21/2020 |
Update or Other Action |
DOT requested information on this site due to the Knik-Goose Bay Road Widening project. Subsequent discussions with DOT indicated they have acquired 1800 South Knik-Goose Bay Road and plan to demolish the buildings at some point. |
Janice Wiegers |
| 4/3/2023 |
Meeting or Teleconference Held |
DEC met with DOT staff to discuss upcoming construction activities. DOT plans to demolish the building first and then address contamination. Floor drains in the building were discussed, and follow up communication with EPA indicated that those floor drains had been investigated and the septic system had been classified as domestic waste system only. DEC and DOT also discussed an on-site drinking water well, which has been sampled in the past and did not contain contaminants. |
Janice Wiegers |
| 7/2/2024 |
Update or Other Action |
Contacted by DOT to discuss additional site characterization. Provided email from 2023 discussions and suggested the following: 1) Soil sampling through borings or excavation to characterize the waste oil spill behind the building; 2) Possible groundwater sampling for the waste oil spill; 3) Soil borings/monitoring wells in the areas where former USTs were located, or contamination was observed to verify cleanup has been completed. Also stated that a soil management plan would be needed for excavation during construction to ensure that plans are in place to identify contaminated soil properly dispose of it. |
Janice Wiegers |
| 10/21/2024 |
Potentially Responsible Party/State Interest Letter |
Sent PRP letter to DOT as the new landowner. DOT acquired the property in 2020. A workplan request letter was also sent on this date asking for investigation of remaining data gaps, including investigation of remaining soil and groundwater contamination associated with the USTs (Texaco - 1.5 Mile Knik Rd; Hazard ID 23488) and additional investigation of the waste oil spill behind the former building. |
Janice Wiegers |
