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WORK PLAN OF LIMITED SUBSURFACE INVESTIGATION PROPOSED WIRELESS TELECOMMUNICATIONS SERVICE FACILITY LOCATION ON THE CONNELL MOTORS PROPERTY AT 2219 NORTH WILSON WAY IN THE CITY OF STOCKTON, (SAN JOAQUIN COUNTY), CALIFORNIA T-MOBILE USA SITE NAME: Connell Motor T-MOBILE USA SITE NUMBER: SC-13309A 1.0 Site Description and History The subject property is located at 2219 North Wilson Way in the city of Stockton, San Joaquin County, California (subject property). The subject property is situated to the northwest of the intersection of Wilson Way and Orwood Street in the northern portion of the city of Stockton (Figure 1). The subject property is a generally rectangular-shaped, roughly eight-acre parcel of land bordered by variable-size commercial parcels and public rights-of-way. Commercial improvements to the subject property include a rectangular-shaped warehouse, restaurant, ancillary building, and asphalt and concrete tarmac (Figure). The warehouse is centrally located on the subject property and set-back about 80 feet from Wilson Way. The restaurant and ancillary building have been developed along the southern margin of the subject property about 150 feet south of the warehouse. A review of zoning drawings indicated that the proposed WTS facility (Figure 5) would involve: Establishing a roughly 20- by 30-foot ground lease near the southwestern corner of the subject property within which a 70-foot monopole would be erected and up to four equipment cabinets associated with the proposed WTS facility would be placed to house associated electronic equipment and backup batteries; Constructing a privacy fence enclosure about the proposed ground lease to restrict access to the proposed lease area; Establishing a 15-foot-wide access easement that extends about 250 feet from Wilson Way to the proposed lease area; and Connecting the proposed WTS facility to land-based (wired) electrical and telecommunications utilities located at a nearby joint-utility pole located about 150 feet to the southeast of the proposed lease area. The proposed ground lease and WTS facility would be sited on a host property that is identified as the former location of nine underground storage tank (USTs), including seven 10,000-gallon tanks used to storing diesel fuel and gasoline and two 500-gallon tanks for used/waste oil. These USTs were reportedly removed from the subject property sometime in 2000. Releases of gasoline and diesel fuel from these UST systems on the central and western portions of the subject property have resulted in widespread contamination of soil and groundwater at the site. Once released, site investigation data suggests that petroleum hydrocarbon contaminants have migrated westerly and vertically to depths ranging from 55 to more than 75 feet below ground surface (bgs). Contamination from a release from the former UST area on the western portion of the site is less severe; however, released petroleum hydrocarbons migrated westerly from this former UST area and vertically to depths ranging from 35 to 55 feet bgs. Recent groundwater data suggests that contamination at the subject property may extend to depths ranging up to 160 feet bgs. The presence of widespread groundwater contamination of the host property is a potential environmental issue associated with development of the proposed WTS facility. In addition, the proposed Work Plan Site Name: Connell Motors puchin, Site Number: SC-13309A