La. Admin. Code tit. 33 § V-3305

Current through Register Vol. 50, No. 9, September 20, 2024

Section V-3305 - Groundwater Protection Standard

A. The owner or operator must comply with conditions specified in the facility permit that are designed to ensure that hazardous constituents under LAC 33:V.3307 detected (as defined in LAC 33:V.3303.A.1) in the groundwater from a regulated unit do not exceed the concentration limits under LAC 33:V.3309 in the uppermost aquifer underlying the waste management area beyond the point of compliance under LAC 33:V.3311 during the compliance period under LAC 33:V.3313. The administrative authority will establish this groundwater protection standard in the facility permit when hazardous constituents have been detected (as defined in LAC 33:V.3303.A.1) in the groundwater.

B. The groundwater monitoring system shall consist of necessary wells, at least one hydraulically upgradient, to monitor groundwater moving toward the facility, and all the necessary number of wells downgradient to monitor groundwater leaving the facility. The wells shall be located to intercept contamination at the earliest possible occurrence. Well locations and completion depths must be selected to assure that all probable contaminant flow-paths are monitored. The wells shall be cased, and the casings shall be adequately sealed so that contaminants cannot be introduced from the surface or from one aquifer to another within the well bore, and so that only one water bearing sand is sampled per well. The entire groundwater monitoring system must be approved by the administrative authority.

C. The owner or operator of the facility shall develop and adhere to a groundwater sampling and analysis plan, and shall immediately advise the department when significant changes in groundwater quality are determined and verified.

D. Leachate

1. The leachate monitoring system shall contain a method and device to secure samples, and determine leakage at two locations in each unit where the system is required as follows:

a. at the low point inside the barrier (liner) encased in sand, or other porous material, ensuring that leachate from all contents will percolate to the low point. Provision for pumping out all leachate which gathers inside this barrier shall be made; and

b. at a low point under the barrier (liner) and encased in a porous layer over a dense (at least 3 feet of clay at 1 x 10^-7 cm/sec) underlayment, or natural soil, to verify the integrity of the liner.

2. The system shall permit sampling from an accessible surface location.

3. An equivalent system acceptable to the administrative authority may be installed in existing facilities.

E. Air. Installed, or available portable air monitoring devices shall be located at all sites involving: incineration, landfill, or treatment facilities. An installed air monitoring system (triangular grid) with continuous recording shall be installed at all commercial sites.

F. Sampling. Samples shall be taken from all required monitoring systems before waste is introduced (for new sites) to provide adequate base-line data. Sampling shall be done quarterly, and complete records shall be maintained at the site for examination by the administrative authority.

La. Admin. Code tit. 33, § V-3305

Promulgated by the Department of Environmental Quality, Office of Solid and Hazardous Waste, Hazardous Waste Division, LR 10:200 (March 1984), amended LR 10:280 (April 1984), LR 10:496 (July 1984), LR 16:614 (July 1990).

AUTHORITY NOTE: Promulgated in accordance with R.S. 30:2180 et seq.