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Health and Safety Plan 1319 & 1327 South Madison Street, Stockton,CA 432770 *1AE1 Consultants 3.4.3 Review of Utility Maps If work is to be performed in the public right-of-way such as a street, then maps should be obtained of the utilities in the street from the local Public Works Department. These maps may include: • Maps of the sewer system. • Maps of the storm water system. • Maps of the public water system (if owned by the City). If work is to be performed on private properties,then attempts should be made to obtain maps or information of the onsite utilities. It is helpful to interview individuals who may have historical information. Private utility information may be obtained from the client, the property owner,the property manager, or the building engineer. The type of information which may be obtained includes: • Maps and figures showing underground and aboveground equipment, piping, utilities and/or any surface or subsurface hazards, • Historic site information(maps, photos,files), • Site as-built drawings, • Easement maps, • Historic plot plans, • Previous site investigations, • Fire insurance plans, • Tank dip charts,and • Elevations and coordinates maps. 3.4.4 Private Utility Locating Typically, public utility agencies will not mark out utilities on private property. As such, an independent utility locating company is recommended to locate utilities onsite. As described in Section 3.4.5 below, AEI personnel may use portable concrete scanning equipment per manufacturer instructions for limited clearing of potential utilities embedded in slabs. No single utility location instrument can detect all types of utilities,and an experienced independent utility locating company employs a variety of instruments for this purpose. AEI personnel should be onsite with the independent utility locating company in order to ensure that the locations to be cleared are properly located. The following are some of the methodologies associated with locating utilities onsite: Ground Penetrating Radar Ground penetrating radar(GPR) is used for investigating features such as buried drums, tanks, pipes,or other metallic objects. Locating rebar in concrete or detection of voids beneath concrete