Skip to main content
Back To Top Top Back To Top
This website publishes administrative rules on their effective dates, as designated by the adopting state agencies, colleges, and universities.

Rule 3745-54-94 | Concentration limits.

 

(A) The facility permit shall specify the concentration limits in the ground water for hazardous constituents established under rule 3745-54-93 of the Administrative Code. The concentration of a hazardous constituent shall meet one or more of the following:

(1) Shall not exceed the background level of that constituent in the ground water at the time that limit is specified in the permit.

(2) For any of the constituents listed in the table in this rule, the concentration of the constituent shall not exceed the respective value given in the table in this rule if the background level of the constituent is below the value given in the table in this rule.

(3) Shall not exceed an alternate limit established in the permit under paragraph (B) of this rule.

(B) If approved by the director, an alternate concentration limit may be established for a hazardous constituent if it is found that the constituent shall not pose a substantial present or potential hazard to human health or the environment as long as the alternate concentration limit is not exceeded. The director shall consider the following factors when making a determination on the alternate concentration limit:

(1) Potential adverse effects on ground water quality, considering the following:

(a) The physical and chemical characteristics of the waste in the regulated unit, including the potential for migration.

(b) The hydrogeological characteristics of the facility and surrounding land.

(c) The quantity of ground water and the direction of ground water flow.

(d) The proximity and withdrawal rates of ground water users.

(e) The current and future use of ground water in the area.

(f) The existing quality of ground water, including other sources of contamination and the cumulative impact on the ground water quality.

(g) The potential for health risks caused by human exposure to waste constituents.

(h) The potential damage to wildlife, crops, vegetation, and physical structures caused by exposure to waste constituents.

(i) The persistence and permanence of the potential adverse effects.

(2) Potential adverse effects on hydraulically-connected surface water quality, considering the following:

(a) The volume and physical and chemical characteristics of the waste in the regulated unit.

(b) The hydrogeological characteristics of the facility and surrounding land.

(c) The quantity and quality of ground water, and the direction of ground water flow.

(d) The patterns of rainfall in the region.

(e) The proximity of the regulated unit to surface waters.

(f) The current and future uses of surface waters in the area and any water quality standards established for those surface waters.

(g) The existing quality of surface water, including other sources of contamination and the cumulative impact on surface water quality.

(h) The potential for health risks caused by human exposure to waste constituents.

(i) The potential damage to wildlife, crops, vegetation, and physical structures caused by exposure to waste constituents.

(j) The persistence and permanence of the potential adverse effects.

ConstituentMaximum Contaminant Concentration (milligrams per liter)
Antimony0.006
Arsenic0.010
Barium2.0
Benzene0.005
Benzo(a)pyrene (PAHs)0.0002
Beryllium0.004
Bis(2ethylhexyl)pthalate0.006
Cadmium0.005
Carbofuran0.04
Carbon tetrachloride0.005
Chlordane0.002
Chlorobenzene0.1
Chromium (total)0.1
Copper1.3 *
Cyanide (as free cyanide)0.2
2,4-D0.07
1,2-Dibromo-3-chloropropane (DBCP)0.0002
o-Dichlorobenzene0.6
p-Dichlorobenzene0.075
1,2-Dichloroethane0.005
1,1-Dichloroethylene0.007
cis-1,2-Dichloroethylene0.07
trans-1,2-Dichloroethylene0.1
Dichloromethane (Methylene chloride)0.005
1,2-Dichloropropane (Propylene dichloride)0.005
Dinoseb0.007
Endrin0.002
Ethylbenzene0.7
Ethylene dibromide0.00005
Heptachlor0.0004
Heptachlor epoxide0.0002
Hexachlorobenzene0.001
Hexachlorocyclopentadiene0.05
Lead0.015 *
Lindane0.0002
Mercury (inorganic)0.002
Methoxychlor0.04
Pentachlorophenol0.001
Polychlorinated biphenyls (PCBs)0.0005
Selenium0.05
Styrene0.1 *
Tetrachloroethylene0.005
Thallium0.002
Toluene1.0
Toxaphene0.003
2,4,5-TP (Silvex)0.05
1,2,4-Trichlorobenzene0.07
1,1,1-Trichoroethane (Methyl chloroform)0.2
1,1,2-Trichloroethane0.005
Trichloroethylene0.005
Vinyl chloride0.002
Xylene10.0
* Action level, not a maximum contaminant limit.

Last updated July 20, 2022 at 9:13 AM

Supplemental Information

Authorized By: 3734.12
Amplifies: 3734.12
Five Year Review Date: 2/12/2023
Prior Effective Dates: 8/30/1984, 4/1/1990, 12/7/2004, 3/17/2012