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• North of the property, across Whistler Way, is a residential development. • The eastern edge of the property is bounded by fallow land with commercial enterprises in the distance. The City of Stockton has an operating water well approximately 200 feet to the southeast. • To the south of the Site is fallow land running to Bear Creek. • No hazardous materials or evidence of hazardous materials were noted on any adjacent properties or at any of the nearby commercial enterprises. • A series of natural gas pipeline valves and monitoring equipment lies at the junction of Lower Sacramento Road and Bear Creek. The Pipeline Risk Study completed for the Site determined that this pipeline, owned by PG&E, is an insignificant risk to the Site. 8.0 CONCLUSIONS AND RECOMMENDATIONS After a thorough review of Environmental Databases,Aerial Photographs, Historic Topographical Maps, oil and water well information and a Site Reconnaissance, Aperio Inc. has determined there to be recognized environmental conditions (REC's) on the subject property. They are: • Lead based paint outside and inside the house and garage as determined by the report detailed in Section 5.7 above and 2005 sampling by Wallace-Kuhl and Associates. • A 55 gallon drum in the garage with unknown contents to be disposed of properly in the demolition of the buildings. • A potential environmental concern of the demolished barn that is no longer on Site. The barn most likely was painted with lead based paint(similar to the house and garage) and may be a source of other environmental issues. • The domestic water well needs to be destroyed according to state and local rules and regulations. • The potential for methane and hydrogen sulfide soil vapors due to the fact that the Site is above a historic gas field. Due to the factors listed above, Aperio Inc. recommends: • That the current buildings and water well be demolished and the debris disposed of appropriately to the proper waste disposal facility. • Due to the Site being a proposed school Site,further soil sampling should occur in the format of a Preliminary Environmental Assessment (PEA). This sampling should focus on the former agricultural fields on Site, around the buildings and in the location of the former barn to determine if and/or to what extent Organochlorine Pesticides (OCP's), lead based paint and possibly hydrocarbons (in the garage) have impacted the Site. • Conduct soil vapor sampling for methane and hydrogen sulfide to determine if or to what extent soil vapors may be present at the Site. Phase I Environmental Site Assessment Proposed Podesta Ranch Elementary School December 5,2006 Page 14 of 14