| Action Date |
Action |
Description |
DEC Staff |
| 12/1/2014 |
Potentially Responsible Party/State Interest Letter |
Potentially responsible party / state interest letter sent to landowner by PERP staff John Ebel. |
Mitzi Read |
| 12/11/2014 |
Spill Transferred from Prevention Preparedness and Response Program |
Spill transferred by PERP staff John Ebel. Spill no. 14309924003; spill date - 10/28/14; substance = diesel; quantity = unknown; source = underground heating oil tank; PERP file no. 102.02.155. |
Mitzi Read |
| 12/12/2014 |
Site Added to Database |
A new site has been added to the database |
Mitzi Read |
| 12/16/2014 |
Exposure Tracking Model Ranking |
Initial ranking with ETM completed for source area id: 79714 name: Underground Heating Oil Tank |
Mitzi Read |
| 1/30/2015 |
Update or Other Action |
Letter sent to RP requesting additional site characterization. |
Janice Wiegers |
| 3/18/2015 |
Update or Other Action |
Letter sent to owner describing results of drinking water sample collected by DEC staff in December 2014. Sample was analyzed for BTEX by AK101. No BTEX compounds were detected. The sample was collected at the faucet after the water softener because no pretreatment point for sampling was found. |
Janice Wiegers |
| 4/16/2015 |
Update or Other Action |
Letter describing drinking water well results returned on 4/1/15; resent to different address on 4/16/15. |
Janice Wiegers |
| 12/21/2015 |
Update or Other Action |
Soon after spill was reported, air cleaner/filter was provided by DEC to help remove petroleum vapors from inside the house after the spill. DEC picked up the air filter and removed it from the residence so it could be used at a different location. Odors still present indoors. DEC will schedule a visit to return with PID to evaluate indoor air after the air cleaner has been out of the house for awhile. |
Janice Wiegers |
| 1/8/2016 |
Site Visit |
ADEC personal talked with the homeowner, delivered the site characterization letter, inspected the crawlspace vapor extraction system and field tested system performance using a PID and manometer. The homeowner detected petroleum odors coming through holes around water lines beneath the kitchen sink and plugged them, effectively stopping the odors from this location. Petroleum odors still are present, especially in the crawl space. An HRV is presently being used to extract petroleum vapors from beneath a vapor barrier in the crawl space and exhaust them outside. The system is effectively reducing vapors beneath the vapor barrier, as levels have not increased after the removal of the air cleaner. PID levels are higher beneath the vapor barrier than in the crawlspace and increase further if the system is shut off. Fresh air is being drawn through the HRV and exhausted into the crawl space. This may be causing remaining vapors in the crawl space to mix with the main house. |
Shawn Tisdell |
| 1/21/2016 |
Update or Other Action |
Letter hand delivered by ADEC to home owner summarizing site visit observations and recommendations including: seek an HVAC installer or specialist to possibly modify HRV ventilation to reduce level of petroleum vapors, consider replacing the HRV with a fan designed for radon removal, sample indoor air contaminant concentrations with the assistance of a qualified environmental professional. A copy of the 1/30/15 letter requiring site characterization was also hand-delivered. |
Shawn Tisdell |
| 7/28/2016 |
Update or Other Action |
Supply wells were sampled for VOCs and PAHs on 6/30/2016 by DEC staff at the site and at a down gradient property. No petroleum contamination was detected above cleanup or quantifiable levels for any reported compound at either location. Letters and laboratory results were sent out to both locations on 7/28/2016. |
Shawn Tisdell |
| 12/6/2016 |
Update or Other Action |
Letter sent by DEC to RP regarding participation in the HHOT pilot project. |
Shawn Tisdell |
| 3/1/2017 |
Site Visit |
DEC staff visited the site in preparation for an air sampling event. A building inventory and indoor air sampling questionnaire was completed. Sampler locations and possible background sources of VOCs into indoor air were discussed with the RP. PID readings indicated that VOCs in the main living area of the house ranged from 0.64 to 0.74 ppm, but increased to 0.95 in the cupboard beneath the kitchen sink and to 1.1 near the crawlspace access. PID levels in the crawlspace were 2.2 ppm and increased to 5.5 ppm beneath the vapor barrier when the vapor mitigation system was operating and to 9.8 ppm after the system was shut off. |
Shawn Tisdell |
| 3/9/2017 |
Site Visit |
DEC staff deployed 5 passive air samplers which will be measuring select VOC vapors associated with heating oil. Two samplers were placed in the main living area, one was placed in the crawlspace and another outside. These samplers will be deployed for at least two weeks. |
Shawn Tisdell |
| 3/24/2017 |
Site Visit |
DEC staff recovered 5 passive air samplers that had been deployed on 3/9/2017. These samplers will be sent to a laboratory for analysis. |
Shawn Tisdell |
| 6/6/2017 |
Site Visit |
DEC staff visited the site to evaluate performance of a vapor mitigation system (VMS) that had been installed over the previous several days. PID measurements of VOCs in the living area had been reduced from previous site visits to 0.3 ppm from around 0.7 ppm. A radon style fan, perforated pipe and new vapor barrier was installed to remove vapors from the fill in the crawlspace. The vapor barrier was drawn tightly down to the gravel due to a negative pressure of approximately 1 in H2O (250 pascals). A fan was also installed in the crawlspace to ventilate the crawlspace if necessary. A humidistat was set up to turn the crawlspace ventilator fan on when humidity reached 50%. VOCs were measured in the exhaust air of the VMS at 21 ppm, indicating the system was effectively removing contamination from beneath the vapor barrier in the crawlspace. |
Shawn Tisdell |
| 8/3/2017 |
Site Visit |
DEC staff visited the site to inspect the vapor mitigation performance and deploy passive air samplers for system installation follow-up. The system was operating nominally. No petroleum odors were noted in the living area of the house, however petroleum odors were noted in the crawlspace. Total VOCs measured in the crawlspace ranged from 0.5 to 8.0 ppm. Two radiello 130 air samplers were set up in the main living area, one in the crawlspace and one outside. They will be deployed for a minimum of 14 days. |
Shawn Tisdell |
| 10/2/2017 |
Site Characterization Workplan Approved |
A work plan prepared by Nortech has been received, reviewed and approved. This report details the proposed strategy to sample soil and groundwater resulting from a heating oil release at the site with the goal to delineate the extent of soil and groundwater contamination at the site. |
Shawn Tisdell |
| 10/9/2017 |
Site Visit |
DEC staff observed the advancement of soil borings and installation of monitoring wells at the site to help delineate the degree and extent of soil and groundwater contamination. This information will be presented in an upcoming report. |
Shawn Tisdell |
| 3/15/2018 |
Document, Report, or Work plan Review - other |
DEC reviewed site assessment report which characterizes soil and groundwater contamination associated with a heating oil release. Soil contamination remains on site above cleanup levels beneath the residence and in soil to the east and south from 2 to 10 feet below ground level. |
Shawn Tisdell |
| 9/28/2018 |
Site Visit |
DEC staff visited the site to talk with the RP about mold concerns in the crawlspace. Photos were taken and compared to older photos. The mold remains within the crawlspace wall cavity and has not significantly changed from a couple of years ago. |
Shawn Tisdell |
| 12/5/2018 |
Exposure Tracking Model Ranking |
A new updated ranking with ETM has been completed for source area 79714 Underground Heating Oil Tank. |
Shawn Tisdell |
| 1/18/2019 |
Site Visit |
DEC staff responded to odor complaint by home owner. Verified that the vapor mitigation system was not functioning properly and contacted contractor to repair system. Turned on the crawlspace ventilator to remove additional crawlspace air. |
Shawn Tisdell |
| 1/23/2019 |
Site Visit |
DEC staff went to the site to verify repairs to vapor mitigation system that had been blocked by ice. |
Shawn Tisdell |
| 1/30/2019 |
Update or Other Action |
DEC staff contacted the RP to inquire if vapor mitigation system repairs continued to appear effective. No odors or other observations of system failure have been observed. Additional modifications to the system, including insulating the exhaust pipe and modifying air flow through the system were discussed. |
Shawn Tisdell |
| 3/5/2019 |
Site Visit |
Modifications were made to vapor mitigation system to address problems with the exhaust line freezing up. The exhaust line was insulated after leaving the house and a valve was placed in the system to allow more heated air to pass through the system. |
Shawn Tisdell |
| 5/20/2019 |
Update or Other Action |
Received indoor air sampling results of testing following vapor system upgrade. All tested analytes in the living room area were below ADEC target levels. The crawlspace continued to exceed indoor air target levels for naphthalene (2.4 µg/m3) and 1,2,4-trimethylbenzene (20 µg/m3). |
Shawn Tisdell |
| 5/29/2019 |
Site Visit |
Site visit to observe mitigation system operation and evaluate conditions causing continued target level exceedances of naphthalene and 1,2,4 trimethlybenzene in the crawlspace. |
Shawn Tisdell |
| 9/19/2019 |
Document, Report, or Work plan Review - other |
The project manager approved of the well decommissioning work plan provided by Nortech for the decommissioning of monitoring wells at the site. |
Shawn Tisdell |
| 5/27/2020 |
Site Visit |
DEC staff conducted a site visit to observe vapor mitigation system performance to follow-up a phone call indicating odors had been observed in early March, but did not report it at the time. The system was performing as designed, depressurizing beneath the vapor barrier and exhausting outside the building. It is possible that the exhaust stack had frozen up, but has since thawed out. |
Shawn Tisdell |
| 12/29/2020 |
Meeting or Teleconference Held |
Project manager talked with RP about current observations with the vapor mitigation system performance. RP indicated that they haven't observed any specific issues, but would check the system. This includes checking the crawlspace ventilator vent for obstructions and to observe if air was blowing out of the vent and checking the vapor barrier depressurization system for ice buildup at the exhaust vent and that the vapor barrier was being pulled tightly down to the gravel in the crawlspace. |
Shawn Tisdell |
| 3/16/2021 |
Meeting or Teleconference Held |
DEC project manager contacted responsible party(RP)to discuss vapor mitigation system operation. The RP has not noticed any problems, such as odors, and will inspect the crawlspace vent and the sub-vapor barrier exhaust pipe to make sure they are operating and not blocked. |
Shawn Tisdell |
| 12/20/2021 |
Update or Other Action |
DEC project manager contacted responsible party(RP)to discuss current status of vapor mitigation system and house observations. The RP has not noticed any problems, such as odors, and will inspect the crawlspace vent, cleaning snow away from it if necessary, will check the sub-vapor barrier exhaust pipe behind the house to make sure it is operating and not blocked by ice. DEC staff discussed conducting a site visit in early spring to inspect system operation. |
Shawn Tisdell |
| 1/25/2023 |
Site Visit |
DEC staff conducted a site visit to observe performance of the vapor mitigation system. A photoionization detector with a parts per billion (ppb) level sensor was used to measure volatile organic compounds in and around the house. Outdoor and indoor dining room air was 0 ppb. Crawlspace air was 150 ppb. These are the lowest levels ever observed in the house. The mitigation system fans were operating properly. |
Shawn Tisdell |
