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Additional Phase I and Phas. Environmental Site Assessments Tracy, California Home Depot, U.S.A. Inc. along the north side of Grant Line Road. Various debris including spilled paint cans were observed on the ground surface between the ditch and the edge of Grant Line Road. Municipal planning personnel reported that the subject property is located within an area believed to provide habitat for the western burrowing owl (Speotyto cunicularia hypugaea), a Federal and California Species of Concern. Burrowing owls can dig their own burrows, but prefer the deserted excavations of ground squirrels, badgers, and other animals. A burrowing owl survey was conducted on the previously investigated, adjacent site in May 1999. The results of this survey indicated that burrowing owls were present on the adjacent site and are likely to be present on the subject site. Numerous ground squirrels and ground squirrel burrows were observed during the additional Phase I investigation, however no evidence of burrowing owls was discovered on the expanded subject site by the WESTON representative. Home Depot separately commissioned a biological survey firm to more definitively evaluate the possible presence of burrowing owls at the subject site. PG&E was consulted regarding their high-voltage transmission line easements which extend approximately 100 feet out from the limits of the overhead lines. All development plans within these easements must be approved by PG&E. Mr. Mike Gumby of PG&E Property Management was interviewed regarding potential health issues associated with the electromagnetic field (EMF) generated by these transmission lines. Mr. Gumby indicated that health studies have been performed on PG&E workers who have frequent exposure to EMF and that the results of these studies have been inconclusive. Mr. .Jim Parker, Home Depot's internal liason with Lucent Technologies, who is the manufacturer of the wireless communication system used in Home Depot stores, indicated that the communication system operates at 1.9 gigahertz. Due to the difference in frequencies between the communication system and the transmission lines, which are reported as 60 hertz by Mr. Gumby, the potential for interference is believed to be unlikely. Mr. Parker indicated that testing will be conducted when the communication system is installed to confirm operability, and that any necessary improvements would be implemented at that time. The City of Tracy Planning Department was consulted regarding the additional property (subject property) that Home depot proposes to develop. The Planning Department is requiring assessment of potential impacts to soil and groundwater from pesticides and non-specific petroleum hydrocarbons prior to development of the subject property. The San Joaquin County Environmental Health Division, the permitting agency for the subsurface exploration described herein, also requires a copy of this assessment report as a condition of the permit. No evidence of aboveground or underground storage tanks was observed on the property, and none are known to have been located on-site in past years. A shallow ditch drains the southern portion of the site. No wetlands, surface water bodies, or stormwater retention facilities are on-site. Static groundwater is present at approximately 8 feet bgs. Regional groundwater flow in the site vicinity is toward the northeast (WESTON, March 1999). Soils in the area of the subject property are classified as Capay clay (U.S. Department of Agriculture, Soil Conservation Service, 1992). These soils form on alluvium deposited in interfan basins, and typically consist of surficial clay and silty clay overlying occasionally calcareous clay and may be developed to a depth of 60 inches or more. These soils are slowly permeable. The San G:home\clarkeb\projects\homedepo\tracy\addp I&2.doc 2-2 October 2000