Louisiana Administrative Code
Title 33 - ENVIRONMENTAL QUALITY
Part V - Hazardous Wastes and Hazardous Materials
Subpart 1 - Department of Environmental Quality-Hazardous Waste
Chapter 43 - Interim Status
Subchapter E - Groundwater Monitoring
Section V-4371 - Sampling and Analysis

Universal Citation: LA Admin Code V-4371

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

A. The owner or operator must obtain and analyze samples from the installed groundwater monitoring system. The owner or operator must develop and follow a groundwater sampling and analysis plan. He must keep this plan at the facility. The plan must be approved by the administrative authority and must include procedures and techniques for:

1. sample collection;

2. sample preservation and shipment;

3. analytical procedures; and

4. chain of custody control.

COMMENT: See "Procedures Manual for Groundwater Monitoring at Solid Waste Disposal Facilities," EPA-530/SW-611, August 1977 and "Methods for Chemical Analysis of Water and Wastes," EPA-600/4-79-020, March 1979 for discussions of sampling and analysis procedures.

B. The owner or operator must determine the concentration or value of the following parameters in groundwater samples in accordance with LAC 33:V.4371.C and D:

1. parameters characterizing the suitability of the groundwater as a drinking water supply, as follows:

Parameter

Maximum Level (mg/L unless otherwise stated)

Arsenic

0.05

Barium

1.0

Cadmium

0.01

Chromium

0.05

Fluoride

1.4-2.4

Lead

0.05

Mercury

0.002

Nitrate (as N)

10

Selenium

0.01

Silver

0.05

Endrin

0.0002

Lindane

0.004

Methoxychlor

0.1

Toxaphene

0.005

2-4D

0.1

2,4,5-TP Silver

0.01

Radium

5 pCi/l

Gross Alpha

15 pCi/l

Gross Beta

4 millirem/yr

*Turbidity

1/TU

Coliform Bacteria

1/100 ml

*Turbidity is applicable only to surface water supplies.

2. the following parameters are to be used as a basis for comparison in the event a groundwater quality assessment is required under LAC 33:V.4373.D:
a. chloride;

b. iron;

c. manganese;

d. phenols;

e. sodium;

f. sulfate;

3. parameters used as indicators of groundwater contamination:
a. pH;

b. specific conductance;

c. total organic carbon; and

d. total organic halogen.

C. For all monitoring wells, the owner or operator must establish initial background concentrations or values of all parameters as specified in LAC 33:V.4371.B quarterly for one year.

D. For each of the indicator parameters specified in LAC 33:V.4371.B.3, at least four replicate measurements must be obtained for each sample and the initial background arithmetic mean and variance must be determined by pooling the replicate measurements for the respective parameter concentrations or values in samples obtained from upgradient wells during the first year.

E. After the first year, all monitoring wells must be sampled and the samples analyzed with the following frequencies:

1. at least annually, samples must be collected to establish groundwater quality and analyzed for the parameters specified in LAC 33:V.4371.B.2; and

2. at least semi-annually samples must be collected to indicate groundwater contamination and analyzed for the parameters specified in LAC 33:V.4371.B.3;

3. the administrative authority may require the owner or operator to analyze for specific indicator parameters on a more frequent schedule.

F. Elevation of the groundwater surface at each monitoring well must be determined each time a sample is obtained.

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

Disclaimer: These regulations may not be the most recent version. Louisiana may have more current or accurate information. We make no warranties or guarantees about the accuracy, completeness, or adequacy of the information contained on this site or the information linked to on the state site. Please check official sources.
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