1713.2 Open-Loop Water Well Drilling Logs — 2025 California Mechanical Code

California Mechanical Code (Title 24, Part 4) · 2025 edition · updated 2026-09-25 · California

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Italicized text is a California amendment to the model code, as printed in the official publication.

Cite as: 2025 California Mechanical Code (Title 24, Part 4) § 1713.2 · Effective January 1, 2026 · Official source: Building Standards Commission

The water well drilling logs shall include the following:

(1) The subsurface stratigraphy.

(2) The aquifer type and conditions such as, but not limited to, confined, unconfined, flowing and depth.

(3) The drilling method used and the penetration speed.

(4) The presence of substances known to have a potential risk to health and safety shall be documented in the drill logs and the property owner shall be advised of the potential risk to health and safety.

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▸Contents — California Mechanical Code (Title 24, Part 4)

California Mechanical Code (Title 24, Part 4)

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