California Code, Civil Code - CIV § 2079.7

(a) If a consumer information booklet described in Section 10084.1 of the Business and Professions Code is delivered to a buyer in connection with the sale of real property, including property specified in Section 1102 of the Civil Code, or manufactured housing, as defined in Section 18007 of the Health and Safety Code, a seller or broker is not required to provide additional information concerning, and the information shall be deemed to be adequate to inform the buyer regarding, common environmental hazards, as described in the booklet, that can affect real property.

(b) Notwithstanding subdivision (a), nothing in this section either increases or decreases the duties, if any, of sellers or brokers, including, but not limited to, the duties of a seller or broker under this article, Article 1.5 (commencing with Section 1102) of Chapter 2 of Title 4 of Part 4 of Division 2, or Section 78700 of the Health and Safety Code, or alters the duty of a seller or broker to disclose the existence of known environmental hazards on or affecting the real property.