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MOUNTAIN HOUSE PROPOSED MACHADO TENTATIVE MAP 4. ENVIRONMENTAL CHECKLIST 4.7 HAZARDS • Lead-based paint and asbestos materials were found in the dairy buildings. These materials should be removed for proper disposal prior to demolition of the buildings. • There are two electric transformers that are not marked as PCB-free. Pacific Gas and Electric Company should test these transformers and replace them if they contain PCBs. A 75-foot-wide PG&E easement(i.e., the Rio Oso-Tesla electrical easement), containing 230-kVA overhead electric power transmission lines, extends diagonally across the northwest corner of the project site. These transmission lines emit EMF. The CDE requires that new schools must be at least 150 feet from the edge of 230-kVA transmission line easements. The nearest corner of the new K-8 elementary school site in the proposed project is approximately 330 feet from the edge of the easement. — Despite the lack of state and federal regulations regarding setbacks from land uses other than schools, the MHMP (Section 6.3, page 194) and the Mountain House Development Title (Section 310.5m(f)) designate the following setbacks from the edge of the Rio Oso-Tesla power line easement: • 25 feet for residential dwelling units; • 10 feet for non-residential structures; and • No setback for parking and storage areas. An analysis of the Tentative Map (Associated Engineering, 2006)indicates that future — residences adjacent to the Rio Oso-Tesla power line easement could be less than 25 feet from the edge of the easement since the minimum side yard setback for low and medium residential land uses is only five feet(EDAW, 2005a,Table 3-7). Careful site planning and — design at these lots will be necessary to avoid conflict with MHMP and Mountain House Development Title requirements. SPHIEIR Mitigation Measure 4.9-1 is summarized above. Specific Plan III Implementation Measure 6.7.2.3 b requires cleaning any contamination from dairy operations to meet the standards of the SJCEHD, RWQCB, and other applicable state and county standards and ordinances. Specific Plan III Implementation Measure 6.7.4.3 (d) requires corrective action for the presence of any fuel,pesticide, herbicide, or chemical residue on or under the soil in excess of allowable amounts that is listed on state or federal lists of toxic materials. _ Corrective actions shall be conducted in accordance with requirements of the SJCEHD and the applicable state agency. These mitigation and implementation measures adequately define the actions to be taken to eliminate these hazards that would result in impacts that are less than significant. Mitigation Measures _ No additional mitigation measures are required. c) Emit hazardous emissions or handle hazardous or acutely hazardous materials, substances, or waste within one-quarter mile of an existing or proposed school? 4-38