California Food And Agricultural Code Section 13148

(a) In order to more accurately determine the mobility and persistence of the pesticides identified pursuant to paragraph (2) of subdivision (b) of Section 13144 and to determine if these pesticides have migrated to groundwaters of the state, the director shall conduct soil and groundwater monitoring statewide in areas of the state where the pesticide is primarily used or where other factors identified pursuant to Section 13143 and subdivision (b) of Section 13144, including physicochemical characteristics and use practices of the pesticides, indicate a probability that the pesticide may migrate to the groundwaters of the state. The monitoring shall commence within one year after the pesticide is placed on the Groundwater Protection List and shall be conducted in accordance with standard protocol and testing procedures established pursuant to subdivision (b). Monitoring programs shall replicate conditions under which the pesticide is normally used in the area of monitoring. In developing a monitoring program, the director shall coordinate with other agencies that conduct soil and groundwater monitoring. (b) Within 90 days after a pesticide is placed on the Groundwater Protection List pursuant to subdivision (d) of Section 13145, the director, in consultation with the board, shall develop a standard protocol and testing procedure for each pesticide identified pursuant to subdivision (d) of Section 13145. (c) The director shall report all monitoring results to the State Department of Health Services and the board.