List of Significant Environmental Hazards - …

1 List of Significant Environmental Hazards reported to the DEEPP eriod covering 10/01/1998 through 11/30/2017 AnsoniaSite/locationType of HazardResponseDate NotifiedActionFarrel Corporation25 Main StreetPollution detected in groundwater that discharges to a surface water body may pose a risk to aquatic life. DEP reviewed sampling data and determined that the groundwater pollution does not in fact pose a Significant threat to surface water quality based on site-specific dilution specific abatement action Property10 & 14 Riverside DrivePollution detected in groundwater that discharges to a surface water body may pose a risk to aquatic life. DEP directed the property owner to continue to investigate and remediate the site as required by the Property Transfer Program schedule threat to surface water was evaluated for site-specific conditions and it was determined that conditions would not significantly impact surface water and aquatic of HazardResponseDate NotifiedActionAshford Town Garage185 Nott HighwayPollution detected in groundwater above standards may threaten a drinking water reviewed sampling data and determined pollution in the well is below standards, and the water is safe for human well sampling being overseen by Potable Water Farms33 Pompey Hollow RoadPollution detected in groundwater above standards may threaten a drinking water action was required at the time of notification because the site was in the Potable Water water has been connected to the area.

2 Remedial venting system installed and later deactivated. Further testing shows that pollution is below levels that pose a threat to drinking water wells. No additional abatement action Property70 Perry Hill RoadPollution detected in groundwater above standards may threaten a drinking water discussed with the Environmental consultant additional sampling data obtained for nearby threatened wells that shows there was no pollution in the wells. DEP recommended additional sampling before reoccupancy of wells retested, no pollution detected. No further abatement action of HazardResponseDate NotifiedActionAvon Municipal Landfill281 Huckleberry Hill RoadPollution was detected in a supply well but is below directed the town to identify wells within 1000 feet, including along New Road downgradient of the landfill, and continue to conduct an already approved landfill monitoring residential wells and installed new monitoring well for landfill.

3 Monitoring program , December 29, 2017 Page 1 of 146 Updated as of:South WestList of Significant Environmental Hazards reported to the DEEPP eriod covering 10/01/1998 through 11/30/2017 AvonSite/locationType of HazardResponseDate NotifiedActionMobil Service Station No. 01-363411 West Main StreetPollution detected in groundwater above standards may threaten a drinking water well. The DEP directed the property owner to confirm if a neigboring supply well exists and, if so, sample the well for constituents of wells were found to be within 200 feet side gradient of the plume or 500 feet downgradient of plume. Levels of ETPH detected in groundwater no longer represents an exceedance based on present groundwater Cleaners & Tailors183 West Main StreetPollution detected in groundwater above standards may threaten a drinking water directed the property owner to sample the onsite supply well, identify supply wells within 500 feet, and sample any identified wells for pollutants detected at the wells identified within 500 feet but they are upgradient and not at risk.

4 Volatile organic compounds not detected in on-site drinking water supply well. Site is undergoing investigation and remediation under Property Transfer of HazardResponseDate NotifiedActionHitchcock Chair Company (Plant 2)13 Riverton RoadPetroleum above the groundwater protection criteria threatens a supply directed the property owner to submit a post-remedial monitoring report to document impact is not migrating impacted soil, monitoring 20 wells semi-annually for natural attenuation of petroleum West Hill RoadPollution was detected in a drinking water well but is below standards. DEEP directed the property owner to maintain an existing filter system and to monitor is maintaining a filter system on the impacted Ford385 New Hartford RoadPollution detected in groundwater above standards may threaten a drinking water directed the property owner to identify and sample nearby supply of source of pollution already removed; groundwater monitoring indicates no contaminants of Refuse Disposal District # 1 Route 44 Pollution was detected in a drinking water well above standards.

5 Pollution was detected in a drinking water well but is below standards. Pollution detected in groundwater that discharges to a surface water body may pose a risk to aquatic determined that the site does not pose a risk to human health, and no futher action is retested two affected potable wells, results non-detect for pollutants of staff used file information to calculate actual ammonia reaching river would be less than surface water , December 29, 2017 Page 2 of 146 Updated as of:South WestList of Significant Environmental Hazards reported to the DEEPP eriod covering 10/01/1998 through 11/30/2017 BarkhamstedSite/locationType of HazardResponseDate NotifiedActionRegional Refuse Disposal District # 1 Route 44 Pollution was detected in a drinking water well above standards. Pollution was detected in a drinking water well but is below standards. Pollution detected in groundwater that discharges to a surface water body may pose a risk to aquatic is already aware of this site, and the reported conditions do not require a response for hazard abatement because bottled water is already available as alternate water retested two affected potable wells, results non-detect for pollutants of staff used file information to calculate actual ammonia reaching river would be less than surface water Refuse Disposal District #1 (RRDD #1)Route 44 Pollution was detected in a drinking water well, with some chemicals above standards and others below standards.

6 Ammonia in groundwater could discharge to surface water and threaten aquatic in supply well do not require a response for hazard abatement as bottled water is already available and the source of MTBE has been remediated. Monitoring data indicates stream contains ammonia at less than the reporting hazard retested two affected potable wells, results non-detect for pollutants of staff used file information to calculate actual ammonia reaching river would be less than surface water & S Holding, LLC404 New Hartford RoadPollution was detected in a drinking water well but is below directed the property owner to expand their inventory of water supply wells to a radius of 1000 ft and to continue to sample identified potable supply of 5 potable supply wells continue to be monitored with no detections or signficantly below standards. The other well owners have denied access to FallsSite/locationType of HazardResponseDate NotifiedActionWatkins Bros.

7 Machinery (former)100 Railroad AvenuePollution in the top two feet of soil may pose a risk to human health as a result of direct contact. DEEP reviewed information provided and determined that polluted soil is in secure and fenced area, limiting potential contact, and requested warning signs be posted, the extent of polluted soil be delineated and submittal of periodic status of hazard delineated. Further investigation of site on-going. Quarterly confirmation of access restrictions of HazardResponseDate NotifiedActionBest Cleaners138 Mill StreetPollution detected in groundwater above standards may threaten a drinking water required additional sampling of a nearby identified well and identification of any other drinking water wells within 500 feet of the receptor survey was conducted and one well was identified. This well has been sampled five times in the past six years and no target analytes have been detected. Investigation has been completed and remediation is on-going at the , December 29, 2017 Page 3 of 146 Updated as of:South WestList of Significant Environmental Hazards reported to the DEEPP eriod covering 10/01/1998 through 11/30/2017 BerlinSite/locationType of HazardResponseDate NotifiedActionBest Cleaners138 Mill StreetPollution detected in groundwater above standards may threaten a drinking water well.

8 Pollution detected in groundwater that discharges to a surface water body may pose a risk to aquatic directed the property owner to evaluate the nature, extent and degree of groundwater pollution to determine the threat to surface water near the site and to continue the best effort to obtain the access and sample the identified potable will be monitored per General Permit and work Cleaners138 Mill StreetPollution detected in groundwater above standards may threaten a drinking water well. Pollution detected in groundwater that discharges to a surface water body may pose a risk to aquatic life. DEEP directed the property owner to evaluate the nature, extent and degree of groundwater pollution to determine the threat to surface water near the site and to continue the best effort to obtain the access and sample the identified potable will be monitored per General Permit and work Food Bag #525109 Berlin TurnpikePollution detected in groundwater above standards may threaten a drinking water well.

9 DEEP directed the property owner to identify any water supply wells within 500 feet of the site and to test all supply wells on abutting properties for pollutants detected at the action Russwin225 Episcopal RoadPolluted groundwater beneath an occupied building could affect indoor air quality. DEP required no specific action provided that investigation and remedation is onging in accordance with established schedule and 1999 the responsible party installed a sub slab ventilation system and a groundwater treatment system. These systems were expanded in 2004 and have been operating continuously since 1999 to current day. Annual monitoring report Brake Parts (former)129 Worthington RidgePollution detected in groundwater above standards may threaten a drinking water directed the property owner to sample the onsite supply well and identify and sample wells up to 500 feet from the site for pollutants detected at the potable wells were identified and 8 of them were sampled.

10 Pollution was either not detected or detected but below standards. Monitoring program was implemented. Site issues will be addressed under Property Transfer Utilities - Berlin Campus Settling Basi107 Selden StreetPollution in the top two feet of soil may pose a risk to human health as a result of direct contact. DEEP directed the property owner to submit a plan to identify the extent of polluted soil and to remove the polluted signs were posted and fence was installed to limit the potential contact with polluted soil. Remediation of the impacted soil is overseen by the DEEP's PCB Property769 Beckley RoadPollution detected in groundwater above standards may threaten a drinking water well. DEP reviewed the sampling data that showed no contaminatants related to the spill and determined that no action was required at this , impacted soil and groundwater removed. Confirmatory supply well sampling tried by DEEP August 2015; access denied/no response.