Oklahoma Cleanup Standards for Hydrocarbon Contaminated Groundwater

Product Parameter/ Constituent Lab Test Protocol & Number* Detection Level Notification Level Action Level Cleanup Level
Gasoline, Diesel and Kerosene TPH EPA 8015

1mg/L

any amount above Action Level

> 2mg/L

site specific RBCA standards
Benzene EPA 8015

1mg/L

any amount above Action Level

> 0.005mg/L

site specific RBCA standards
Toluene EPA 8015

1mg/L

any amount above Action Level

> 1.0mg/L

site specific RBCA standards
Ethylbenzene EPA 8015

1mg/L

any amount above Action Level

> 0.7mg/L

site specific RBCA standards
Xylenes EPA 8020

1mg/L

any amount above Action Level

> 10.0mg/L

site specific RBCA standards

Note: Oklahoma uses a Remediation Index in determining cleanup standards on a site-by-site basis.

* Whatever method is specified must be able to detect the most stringent cleanup levels. EPA Method 418.1 is not an accepted testing method for TPH.

Contact: Dick Oppel, Oklahoma Corporation Commission, Underground Storage Tank Program, 405-522-5264



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