Chapter 7 of 84% of exam
Concrete Treatment and Synthetic Application
New for 2026, this section is about 4% of the C-15 exam: mechanical concrete preparation, dust control and resinous (synthetic) finishes. This page is a short survey; the PrepPass C-15 study guide teaches it with Cal/OSHA's silica rules.
Preparation and dust
Prepare concrete mechanically to the coating maker's profile. Floor grinders need integrated water or manufacturer-recommended dust collection with a 99% filter, and indoors a HEPA vacuum between passes.
Silica limits
Action level 25 μg/m³; PEL 50 μg/m³ (8-h TWA).
8 CCR §1532.3