Hilltop Apartments Development Site
Site Description
The Site previously operated as an orchard. At the time of development activities, the Site was vacant, grass-covered land. A private residence is present at the center of the Site’s western boundary and is surrounded by the Site on the north, south, and east sides. The residence is not part of the development and was not included in Site investigation and evaluation.
Several investigations reported arsenic and lead concentrations above MTCA Method A cleanup levels.
Cleanup Activities
Because contamination was capped at the Site at concentrations exceeding MTCA Method A Cleanup levels, institutional controls were required for the Site to be eligible for a No Further Action determination. Institutional controls in the form of a restrictive covenant were recorded for Chelan County Parcel 222014230100 in August 2008 and a property-specific No Further Action determination for that parcel was issued in September 2008.
No Further Action
Ecology determined that the Hilltop Apartments Development Site consists of Chelan County Tax Parcel# 222014230100. It was remediated in its entirety in 2008 during the development of the Hilltop Apartment complex. The portion of the property that was not remediated remains vacant. It has not changed to a land use that increases potential exposure to residual pesticides. The portion of the property that has not been developed will be remediated at the time that it is developed. It is not considered part of the Hilltop Apartments Site. The boundaries of the Site shall consist of the area that was remediated during the development and construction of Hilltop Apartments.
Periodic Reviews
Periodic Review Results
Clean soil, asphalt, and building structures continue to serve as a cap and eliminate the direct exposure pathways to contaminated soils. Based upon the site visit conducted in February 2021, no repair, maintenance or contingency actions have been required.
The restrictive covenant for the Property was recorded and remains active. There is no evidence that a new document has been recorded that limits the effectiveness or applicability of the covenant. The restrictive covenant prohibits activities that will result in the release of contaminants contained as part of the cleanup without Ecology’s approval, and prohibits any use of the property that is inconsistent with the covenant. This restrictive covenant serves to assure the long term integrity of the cap.
Soils with arsenic, lead, and DDT concentrations higher than MTCA Method A cleanup levels are still present at the Site. However, the cap prevents human exposure to this contamination in the vicinity of the apartment complex. The Restrictive Covenant for the Property will ensure that the integrity of the cap will be protected through maintaining the current use of the Property.
Voluntary Cleanup Program
This site was cleaned up under our Voluntary Cleanup Program, which provides technical help to owners of contaminated sites.
Voluntary Cleanup Program customers pay fees to cover our costs for technical help and reviewing cleanup reports. Sites in this program must meet the same cleanup standards as the sites Ecology manages under legal orders.
Site use restrictions called institutional controls are in effect
Institutional controls can be fences, signs, or restrictions on how the property is used. For instance, an institutional control may prohibit installing drinking water wells or disturbing a protective cap that isolates contamination. These restrictions keep the contamination contained and keep people from being exposed to the contamination. The controls are usually listed in environmental covenants recorded with the county.
Periodic reviews are required when institutional controls are required at a site. Ecology conducts reviews to make sure the controls remain effective and the cleanup still protects human health and the environment. We conduct periodic reviews about every five years.
Institutional Controls 1
Environmental Covenant
Restrictions/Requirements
- Ongoing Maintenance of Remedy
- Prohibit Soil Disturbance
- Restrict Land Use
Restricted Media
- Soil
Documents 8
Legal 1
Document Title | Document Date | Document Type |
Hilltop Aparments Environmental Covenant 2287632 | 8/8/2008 | Environmental Covenant; Alternative Mechanism |
Technical Reports 4
Document Title | Document Date | Document Type |
Hilltop Apartments Development Site - Notice of 2nd Periodic Review | 6/3/2021 | Site Specific Administrative Document - other (Administrative correspondence) |
Hilltop Apartments 2021 Periodic Review | 2/1/2021 | Periodic Review (5 Year) |
Hilltop Apartments 2013 Periodic Review | 10/17/2013 | Periodic Review (5 Year) |
Hilltop Apartments Remedial Actions Summary | 9/17/2007 | Remedial Action Report |
Voluntary Cleanup Program 3
Document Title | Document Date | Document Type |
Hilltop Apartments Limited Partnership - No Further Action | 5/10/2021 | VCP Opinion on Site Cleanup – NFA |
Hilltop Apartments - VCP Opinion on Property Cleanup - No Further Action | 9/23/2008 | VCP Opinion on Property Cleanup – NFA |
Hilltop Apartments - VCP Opinion on Site Cleanup - Partial Sufficiency | 10/9/2007 | Voluntary Cleanup Program Opinion – Other |
Places to see print documents
-
Central Regional Office1250 W Alder StUnion Gap, 98903-0009Please schedule an appointment to view print documents at this location.
Contaminants 3
Contaminant Type | Soil |
Groundwater |
Surface Water |
Air |
Sediment |
Bedrock |
---|---|---|---|---|---|---|
Pesticides - Halogenated Pesticides | RA | |||||
Metals - Arsenic | RA | |||||
Metals - Lead | RA |
- S
- Suspected
- C
- Confirmed Above Cleanup Levels
- B
- Below Cleanup Levels
- RA
- Remediated-Above
- RB
- Remediated-Below
- R
- Remediated