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a. Utility Designating for the following areas of underground utilities. i. Area 1 - Hard surfaced area, up to the curb line, bordered by Navarre Street to the north, Marion Street to the south, Michigan street to the west and the east edge of the parking lot on the east side as depicted in Figure 3. The surrounding roadways are not included in the investigation area. ii. Area 2 - Hard surfaced area, up to the curb line, bordered by Main Street to the west and north, Michigan Street to the east and the building and alley limits to the south as identified in Figure 4, the surrounding roadways are not included in the investigation area. iii. Area 3 - Hard surfaced area bordered by Park Lane to the north, Bartlett Street to the south, Main Street to the west and Michigan Street to the ease as depicted in Figure 5. Investigation will include the roadways identified above up to the opposite curb line. iv. Utility designating shall include locating underground gas, water, electric, telephone, fiber optic cable, cable TV and sanitary sewer consisting of force main only. V. Surface geophysical methods will be utilized to interpret the possible presence of underground utilities and then employ electromagnetic equipment to detect the selected utilities. The sub - consultant will attempt to field locate and mark -out buried, "toneable" utilities. Tonable is defined as any utility capable of carrying an electromagnetic signal. Using the aforementioned technology, the sub - consultant will provide paint markings or flags to show the approximate horizontal position of the desired utilities. vi. Ground Penetrating Radar (GPR) will be used in an attempt to locate any non - metallic (nontoneable) utilities that may be present GPR is a wave -based form of geophysical investigation in which an electromagnetic wave, launched by a transmitting antenna element, is propagated downward into the ground. A portion of the wave energy is reflected off of subsurface features differing in electrical properties from the surrounding material. The reflected radar energy is detected back at the surface by a receiving antenna and converted to electrical signals, which correspond to minor changes in the voltage. The signals are sent to the control display unit, amplified and a realtimetwo- dimensional depth profile is constructed. The depth profile is analyzed in the field and features such as subsurface 4of11 Supplemental Agreement No. 2