Louisiana Revised Statutes Tit. 3, § 3307. Investigations

A. The commissioner may investigate any circumstances relating to the presence of pesticides in the waters of the state in concentrations which the commissioner has determined pose a threat or reasonable expectation of a threat to human health or to the environment under R.S. 3:3306.

B. In connection with any investigation conducted under Subsection A of this Section, the commissioner may take the following actions:

C. In circumstances not covered by Subsection B of this Section, the commissioner may apply to the district court for the parish in which the affected water is located for a warrant, or warrants, authorizing an investigation and the taking of samples.

D. Entrance upon property or premises under the provisions of Subsection B of this Section shall not be deemed to be criminal trespass under any state law or local ordinance.

E. The commissioner may issue subpoenas to compel the attendance of witnesses or the production of documents or records anywhere in the state which are relevant to an investigation pursuant to this Part. The sheriff of the parish in which the witness or the documents or records are located shall serve the subpoena if requested by the commissioner.