California Code, Water Code - WAT § 13267.5

(a) In conducting an investigation pursuant to Section 13267 that includes collection of information about discharge of wastewater produced from an oil or gas field, a regional board or the state board may require that the applicable person or entity shall furnish to that board information relating to all chemicals in the discharged wastewater pursuant to the procedures set forth in subdivision (b) of Section 13267.

(b) If a person or entity subject to the disclosure requirement in subdivision (a) is unable to obtain information about a chemical from the chemical's supplier for any reason, including, but not limited to, assertion by the supplier of trade secret protections, the regional board or state board may require that the supplier shall furnish that information to that board pursuant to the procedures set forth in subdivision (b) of Section 13267.

(c) The trade secret protections of subdivision (b) of Section 13267 shall apply to information disclosed pursuant to subdivision (a) or (b) when requested by a person or entity or a supplier, as applicable.

(d) Except as provided in subdivision (c), the information collected by a regional board or the state board pursuant to this section shall be made available to the public on the internet website of the regional board or the state board.

(e) In collecting information described in this section, a regional board or the state board may consult with the Geologic Energy Management Division regarding information collected by the division, pursuant to other disclosure requirements, that may be useful to the investigation.