Lawriter - OAC - 3745-54-94 Concentration limits.

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.

Table: Maximum Concentration of Constituents for Ground Water Protection

Constituent

Maximum Contaminant Concentration (milligrams per liter)

Antimony

0.006

Arsenic

0.010

Barium

2.0

Benzene

0.005

Benzo(a)pyrene (PAHs)

0.0002

Beryllium

0.004

Bis(2ethylhexyl)pthalate

0.006

Cadmium

0.005

Carbofuran

0.04

Carbon tetrachloride

0.005

Chlordane

0.002

Chlorobenzene

0.1

Chromium (total)

0.1

Copper

1.3 *

Cyanide (as free cyanide)

0.2

2,4-D

0.07

1,2-Dibromo-3-chloropropane (DBCP)

0.0002

o-Dichlorobenzene

0.6

p-Dichlorobenzene

0.075

1,2-Dichloroethane

0.005

1,1-Dichloroethylene

0.007

cis-1,2-Dichloroethylene

0.07

trans-1,2-Dichloroethylene

0.1

Dichloromethane (Methylene chloride)

0.005

1,2-Dichloropropane (Propylene dichloride)

0.005

Dinoseb

0.007

Endrin

0.002

Ethylbenzene

0.7

Ethylene dibromide

0.00005

Heptachlor

0.0004

Heptachlor epoxide

0.0002

Hexachlorobenzene

0.001

Hexachlorocyclopentadiene

0.05

Lead

0.015 *

Lindane

0.0002

Mercury (inorganic)

0.002

Methoxychlor

0.04

Pentachlorophenol

0.001

Polychlorinated biphenyls (PCBs)

0.0005

Selenium

0.05

Styrene

0.1 *

Tetrachloroethylene

0.005

Thallium

0.002

Toluene

1.0

Toxaphene

0.003

2,4,5-TP (Silvex)

0.05

1,2,4-Trichlorobenzene

0.07

1,1,1-Trichoroethane (Methyl chloroform)

0.2

1,1,2-Trichloroethane

0.005

Trichloroethylene

0.005

Vinyl chloride

0.002

Xylene

10.0

     

* Action level, not a maximum contaminant limit.

  

Effective: 2/12/2018
Five Year Review (FYR) Dates: 10/30/2017 and 02/12/2023
Promulgated Under: 119.03
Statutory Authority: 3734.12
Rule Amplifies: 3734.12
Prior Effective Dates: 08/30/1984, 04/01/1990, 12/07/2004, 03/17/2012