Manhole 34
Facility Site ID:
470
Cleanup Site ID:
3667
Site Description
Petroleum products were released into the environment at this site from several leaking underground storage tank systems in the area. Initial reports of a possible petroleum release were received by Ecology in March 1989. Follow-up investigation conducted by Ecology revealed liquid petroleum product and petroleum vapors in the city storm drain at Manhole 34; these were removed to eliminate the immediate threat to safety.
Cleanup Activities
A significant part of the Manhole 34 cleanup relies upon the natural degradation of petroleum hydrocarbons called "natural attenuation". After removing the floating petroleum from the groundwater table, the cleanup will rely on nature to eat the petroleum remaining in the soil and groundwater below the cleanup level. Site monitoring will be conducted to ensure that nature is capable of treating the groundwater contamination in a reasonable timeframe.
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
County Recording #:
7332856
County Recording Date:
5/6/2003
Restrictions/Requirements
- Restrict All Ground Water Extraction/Well Installation
- Restrict Land Use
Restricted Media
- Groundwater
- Soil
Documents 25
Legal 5
| Document Title | Document Date | Document Type |
| Manhole 34 - implement CAP CD No. DE 1215 | 5/4/2004 | Consent Decree |
| Manhole 34 - Restrictive Covenant 7332856 | 5/6/2003 | Environmental Covenant; Alternative Mechanism |
| Manhole 34 - RI/FS EO No. DE 93TC-C466 | 9/28/1993 | Enforcement Order |
| Manhole 34 - RI/FS AO No. DE 93TC-C465 | 8/17/1993 | Agreed Order |
| Manhole 34 - implement emergency response AO No. DE 92TC-C324 | 5/21/1992 | Agreed Order |
Leaking Underground Storage Tank 1
| Document Title | Document Date | Document Type |
| Manhole 34 - Mathias Texaco UST Closure Site Assessment | 10/23/1997 | LUST - Site Assessment Report |
Outreach Information 3
| Document Title | Document Date | Document Type |
| Manhole 34 - CD fact sheet | 1/2/2003 | Fact Sheet\Public Notices |
| Manhole 34 - draft CAP fact sheet Spanish | 7/1/2001 | Fact Sheet\Public Notices |
| Manhole 34 - draft CAP fact sheet | 7/1/2001 | Fact Sheet\Public Notices |
Technical Reports 16
| Document Title | Document Date | Document Type |
| Manhole 34 - Cleanup Action Plan | 4/7/2023 | Site Specific Administrative Document - other (Administrative correspondence) |
| Manhole 34 - Site Manager Change | 2/3/2023 | Site Specific Administrative Document - other (Administrative correspondence) |
| Manhole 34 - 2021 Annual Site Status Report | 6/30/2022 | Groundwater Monitoring Report |
| Manhole 34 - 2022 Annual Site Status Report | 6/30/2022 | Groundwater Monitoring Report |
| Manhole 34 - Response to Ecology's request for a Comprehensive Review | 11/19/2019 | Site Specific Administrative Document - other (Administrative correspondence) |
| Manhole 34 - Cleanup Action Plan | 7/17/2019 | Site Specific Administrative Document - other (Administrative correspondence) |
| Manhole 34 - Comprehensive Review Report | 11/20/2018 | Site Specific Technical Document - other |
| Manhole 34 - Comprehensive Review Schedule Approval | 8/29/2018 | Site Specific Administrative Document - other (Administrative correspondence) |
| Manhole 24 - July 2018 response to Ecology's request for a Comprehensive Review | 8/1/2018 | Site Specific Administrative Document - other (Administrative correspondence) |
| Manhole 34 - 2017 Annual Site Status Report | 4/3/2018 | Groundwater Monitoring Report |
| Manhole 34 - 2015 Annual Site Status Report | 5/25/2016 | Groundwater Monitoring Report |
| Manhole 34 - Semiannual Site Status Report Second Half 2014 | 5/26/2015 | Progress Report |
| Manhole 34 - Sunnyside Tire Center Property Excavation Completion Report | 3/20/2014 | Remedial Action Report |
| Manhole 34 - new conditions at site letter | 10/21/2011 | Site Specific Administrative Document - other (Administrative correspondence) |
| Manhole 34 - Limited Site Investigation Report | 10/7/2011 | Site Specific Technical Document - other |
| Manhole 34 - Cleanup Action Plan | 8/1/2001 | Cleanup Action Plan |
There may be more documents related to this site. To obtain documents not available electronically, you will need to make a public records request.
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 5
| Contaminant Type | Soil |
Groundwater |
Surface Water |
Air |
Sediment |
Bedrock |
|---|---|---|---|---|---|---|
| Non-Halogenated Organics - Petroleum Products-Unspecified | C | C | ||||
| Non-Halogenated Organics - Benzene | C | B | ||||
| Non-Halogenated Organics - Other Non-Halogenated Organics | C | B | ||||
| Non-Halogenated Organics - Petroleum-Diesel | C | B | ||||
| Non-Halogenated Organics - Petroleum-Gasoline | C | C |
- S
- Suspected
- C
- Confirmed Above Cleanup Levels
- B
- Below Cleanup Levels
- RA
- Remediated-Above
- RB
- Remediated-Below
- R
- Remediated
This contaminant list was based on our best information at the time it was entered. It may not reflect current conditions at the site.