California Code
ARTICLE 6 - Requirements for Property Assessment and Cleanup
Section 25400.38.

25400.38. The PSA work plan and PSA report shall be signed and notarized by the contractor responsible for the completion of the preliminary site assessment and by a certified industrial hygienist for sufficiency and completeness.

(Added by Stats. 2005, Ch. 570, Sec. 1. Effective January 1, 2006.)