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Federal and State regulations govern the renovation and demolition of structures where materials <br />containing lead and asbestos are present. These requirements include: SCAQMD Rules and <br />Regulations pertaining to asbestos abatement (including Rule 1403), Construction Safety Orders <br />1529 (pertaining to asbestos) and 1532.1 (pertaining to lead) from Title 8 of the California Code <br />of Regulations, Part 61, Subpart M of the Code of Federal Regulations (pertaining to asbestos), <br />and lead exposure guidelines provided by the U.S. Department of Housing and Urban <br />Development (HUD). Asbestos and lead abatement must be performed and monitored by <br />contractors with appropriate certifications from the State Department of Health Services. In <br />addition, Cal/OSHA has regulations concerning the use of hazardous materials, including <br />requirements for safety training, availability of safety equipment, hazardous materials exposure <br />warnings, and emergency action and fire prevention plan preparation. Cal/OSHA enforces the <br />hazard communication program regulations, which include provisions for identifying and labeling <br />hazardous materials, describing the hazards of chemicals, and documenting employee -training <br />programs. All demolition that could result in the release of lead and/or asbestos must be <br />conducted according to Cal/OSHA standards. It was determined that adherence to existing <br />regulations, which require appropriate testing and abatement actions for hazardous materials, will <br />ensure that impacts are less than significant. <br />Unknown Contaminated Sites <br />Aside from the potential release of hazardous materials from demolition of existing structures <br />within the Overlay Zone, grading and excavation of sites for future development resulting from <br />implementation of the Overlay Zone may also expose construction workers and the public to <br />potentially unknown hazardous substances present in the soil or groundwater. If any unidentified <br />sources of contamination are encountered during grading or excavation, the removal activities <br />required could pose health and safety risks such as the exposure of workers, materials handling <br />personnel, and the public to hazardous materials or vapors. Such contamination could cause <br />various short-term or long-term adverse health effects in persons exposed to the hazardous <br />substances. In addition, exposure to contaminants could occur if the contaminants migrated from <br />the contaminated zone to surrounding areas either before or after the surrounding areas were <br />developed, or if contaminated zones were disturbed by future development at the contaminated <br />location. If exposed to hazardous substances, this would result in a significant hazard to the <br />public. <br />It is also possible that old underground storage tanks (USTs) that were in use prior to permitting <br />and record keeping requirements may be present in the Overlay Zone. If an unidentified UST <br />were uncovered or disturbed during construction activities, it would be closed in place or removed. <br />Removal activities could pose both health and safety risks, such as the exposure of workers, tank <br />handling personnel, and the public to tank contents or vapors. Potential risks, if any, posed by <br />USTs would be minimized by managing the tank according to existing Orange County standards <br />Cabrillo Town Center City of Santa Ana <br />Technical Memorandum August 2023 <br />City Council 18 — 571 10/3/2023 <br />