UST Check → counties → Washington → Thurston
Underground storage tanks & leak sites in Thurston County, WA
Every figure below is from EPA UST Finder — the EPA-compiled national registry of state-reported underground storage tanks — county aggregates as published by EPA.
531registered tank facilities
343open tanks
1,157closed tanks
71leak incidents on record
64cleanups still open
64 leak cleanups in
Thurston County are still open — the state has not closed the case.
An open cleanup near a property you're buying or lending on is a findable, checkable fact: it appears in a
per-address screen with distance and the registry record.
Largest registered facilities
By open-tank count, from the facility-level registry. Every fact is attributed to the EPA record (linked ID); something wrong — use the correction path in the footer and we'll fix or remove it promptly.
| Facility | City | Open / closed tanks | Status | EPA record |
|---|---|---|---|---|
| INTERCITY TRANSIT | Olympia | 6 / 10 | Open UST(s) | WA42113995 |
| PILOT TRAVEL CENTER #151 | Tumwater | 6 / 0 | Open UST(s) | WA5885201 |
| COSTCO WHOLESALE #740 | Lacey | 5 / 0 | Open UST(s) | WA641802 |
| OLYMPIA SCHOOL DISTRICT | Tumwater | 5 / 0 | Open UST(s) | WA22818616 |
| 4TH AVE SHELL | Olympia | 4 / 5 | Open UST(s) | WA78313624 |
| LACEY AM-PM | Olympia | 4 / 5 | Open UST(s) | WA1851774 |
| LACEY FUEL | Lacey | 4 / 4 | Open UST(s) | WA2274484 |
| RAINIER GROCERY | Rainier | 4 / 3 | Open UST(s) | WA75768998 |
Open leak cleanups — most recently reported
| Site | City | Reported | Substance | EPA record |
|---|---|---|---|---|
| JACKS AUTO REPAIR | OLYMPIA | not reported | Benzene | WA7996 |
| ZITTLE'S JOHNSON POINT | OLYMPIA | not reported | Benzene | WA8012 |
| BLACK LAKE GROCERY | OLYMPIA | not reported | Petroleum-Other | WA5037 |
| UNOCAL SERVICE STATION 0266 | OLYMPIA | not reported | Metals Priority Pollutants | WA5044 |
| Tumwater Public Works Department | TUMWATER | not reported | Metals Priority Pollutants | WA3851 |
| Double Tree Olympia (Formerly Phoenix Inn) | OLYMPIA | not reported | Metals - Other | WA5257 |
What this means if you're buying or lending here
- "Closed" ≠ clean. A closed tank was taken out of service per the registry — many were closed without soil testing, especially before the late 1990s.
- The registry is incomplete by design. Tanks removed before 1986 and most residential heating-oil tanks were never registered. A county with 531 registered facilities has an unknown number of unregistered ones.
- Open cleanups are the headline. 64 cases in this county are still open; contamination may still be under investigation or remediation — distance from a specific parcel is what matters, and that's a per-address question.
Screen a specific property
This page covers the county. A purchase or loan decision needs the registry around one address: registered tanks at the parcel, every facility within 500 and 1,500 ft, leak cleanups with status and distance — each line cited to the official record.
Screen an address — $49 How it worksThis is a screen of EPA-registered tank and leak records, not an environmental site assessment. State registries are incomplete by design: tanks removed before 1986 and most residential heating-oil tanks were never registered, so a clean screen cannot prove the absence of a tank. "Closed" means a tank was taken out of service per the registry — it does not certify that no contamination remains.
source: EPA UST Finder EPA data vintage 2024-12-04 computed 2026-06-12