567—135.14 (455B) Action levels. The following corrective action levels apply to petroleum regulated substances as regulated by this chapter. These action levels shall be used to determine if further corrective action under 135.6(455B) through 135.12(455B) or 135.15(455B) is required as the result of tank closure sampling under 135.15(3) or other analytical results submitted to the department. The contaminant concentrations must be determined by laboratory analysis as stated in 135.16(455B). Final cleanup determination is not limited to these contaminants. The contamination corrective action levels are:

 	Soil (mg/kg)	Groundwater (ug/L)	
Benzene	0.54	5	
Toluene	42	1,000	
Ethylbenzene	15	700	
Xylenes	No limit	10,000	
Total Extractable
Hydrocarbons	3,800	1,200