Under the California Environmental Quality Act (CEQA), certain types of work on a property may require additional environmental review.
Based on Health Code Article 38 a property could be located in an area with elevated pollutant concentrations. Sensitive use buildings must comply with Health Code Article 38. It applies to buildings:
(a) Newly constructed; or
(b) Undergoing a “Major Alteration to Existing Building”
(c) The subject of an application for a Planning Department-permitted Change of Use.
If the property is located in this Zone, the owner would have to provide an enhanced Ventilation Proposal, prepared by, or under the supervision of, a licensed mechanical engineer or other individual authorized by the California Business to design mechanical ventilation systems. You’d have to budget additional cost for designing and installing this Enhanced Ventilation.