New Jersey Administrative Code
Title 7 - ENVIRONMENTAL PROTECTION
Chapter 14A - NEW JERSEY POLLUTANT DISCHARGE ELIMINATION SYSTEM
Subchapter 10 - GROUND WATER MONITORING REQUIREMENTS FOR HAZARDOUS WASTE FACILITIES
Section 7:14A-10.8 - Concentration limits

Universal Citation: NJ Admin Code 7:14A-10.8

Current through Register Vol. 56, No. 18, September 16, 2024

(a) The Department shall specify in the NJPDES-DGW permit concentration limits in the ground water for hazardous constituents established under 7:14A-10.7. The concentration of a hazardous constituent:

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 (a)2i below, shall not exceed the ground water quality criteria of N.J.A.C. 7:9C, or the 40 CFR 264.93 Table 1 concentration, whichever is more stringent, if the background level of the constituent is below the more stringent of the relevant concentration limits for those parameters; or
i. The following constituents shall be evaluated in accordance with (a)2 above: arsenic, silver, barium, endrin, cadmium, lindane, chromium, methoxychlor, lead, toxaphene, mercury, 2, 4-D, selenium, 2, 4, 5-TP Silvex; or

3. Shall not exceed an alternate limit established by the Department under (b) below.

(b) The Department shall establish an alternate concentration limit for a hazardous constituent if it finds that the constituent shall not pose a substantial present or potential hazard to human health or the environment if such alternate concentration limit is not exceeded, based on the following:

1. Potential adverse effects on ground water quality, considering:
i. The physical and chemical characteristics of the waste in the hazardous waste facility unit, including its potential for migration;

ii. The hydrogeological characteristics of the facility and surrounding land;

iii. The quantity of ground water and the direction of ground water flow;

iv. The proximity and withdrawal rates of ground water users;

v. The current and future uses of ground water in the area;

vi. The existing quality of ground water, including other sources of contamination and their cumulative impact on the ground water quality;

vii. The potential for health risks caused by human exposure to waste constituents;

viii. The potential damage to wildlife, crops, vegetation, and physical structures caused by exposure to waste constituents; and

ix. The persistence and permanence of the potential adverse effects;

2. Potential adverse effects on hydraulically connected surface water quality, considering:
i. The volume and physical and chemical characteristics of the waste in the hazardous waste facility unit;

ii. The hydrogeological characteristics of the facility and surrounding land;

iii. The quantity and quality of ground water, and the direction of ground water flow;

iv. The patterns of rainfall in the region;

v. The proximity of the hazardous waste facility unit to surface waters;

vi. The current and future uses of for those surface waters in the area and any water quality standards established for those surface waters;

vii. The existing quality of surface water, including other sources of contamination and the cumulative impact on surface water quality;

viii. The potential for health risks caused by human exposure to waste constituents;

ix. The potential damage to wildlife, crops, vegetation, and physical structures caused by exposure to waste constituents; and

x. The persistence and permanence of the potential adverse effects.

(c) In making any determination under (b) above, the Department shall assess any identified underground sources of drinking water.

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