(a) On or before the 15th day of each month, each health officer shall submit to the board a survey documenting all beach postings and closures resulting from implementation of Section 115915 that occurred during the preceding month. The survey shall, at a minimum, include the following information:

1. (1) Identification of the beaches in each county subject to testing conducted pursuant to Section 115885 and the amount and types of monitoring conducted at each beach.
2. (2) Identification of the geographic location, areal extent, and type of action taken for each incident of posting or closure conducted pursuant to Section 115915. Geographic location and areal extent shall be noted in sufficient detail to determine on a common map, or by latitude and longitude, the approximate boundaries of the affected beaches.
3. (3) Identification of the standards exceeded and the causes and sources of the pollution, if known. Exceeded standards shall be identified with sufficient particularity to determine which types of tests and biological indicators were used to determine that an exceeded standard exists. Causes of pollution shall be identified with sufficient particularity to determine what substances, in addition to any water carrying the substances, were responsible for the exceeded standard. Sources shall be identified with sufficient particularity to determine the most specific geographical origin of the pollution sources available to the health officer at the time of the posting or closure.