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1.0 INTRODUCTION The Twining Laboratories, Inc. (Twining) was retained by Dama, Inc. to conduct a Phase I Environmental Site Assessment(Phase I) at 1248 W.Hammer Lane and 1301 W. Joan Avenue,in the city of Stockton, San Joaquin County, California(Site). This Phase I was conducted in general conformance with the methods and procedures described in the American Society for Testing and L Materials(ASTM)"Standard Practice for Environmental Site Assessments: Phase I Environmental Site Assessment Process"(Standard Designation E 1527-00),published July 2000,and in accordance with Twining's proposal to Mr. Chad Reed of Dama,Inc., Dated March 5, 2004. 1.1 Objective The objective of this assessment is to identify recognized environmental conditions located at the Site or adjacent properties which could present material risk of harm to public health or to the environment. Recognized environmental conditions are defined within ASTM Designation E-1527 ` as the presence or likely presence of any hazardous wastes and/or substances or petroleum products on a property under conditions that indicate an existing release, a past release, or a material threat y of a release of anyhazardous substances or petroleum products into structures on the property or into the ground, groundwater,or surface water of the property. y 1.2 Scope of Services The Phase I Scope of Services included the following tasks: • A review of the current and past uses of the Site since at least 1937. �- A Site reconnaissance to assess evidence of current and/or past use or storage oftoxic or hazardous material; on-Site ponds, landfills, Orywells, waste streams or other disposal units;visible soil discoloration;aboveground or underground storage tanks; electrical transformers containing polychlorinated biphenyls (PCBs); and drums, barrels and other storage containers. ` A visual review of adjacent properties to assess their potential to adversely impact the Site. ` A review of available federal and state Environmental Protection Agency(EPA)lists of known or potential hazardous waste sites or landfills, and sites currently under .. investigation for environmental violations in the Site area. Using area-profile services,Twining cataloged sites in the vicinity of the Site that have been identified on regulatory agency lists.Search criteria were in conformance with ASTM Standard E 1527-00. • Contact with relevant municipal, county and state agencies to review readily available records and permits. • Preparation of this written report to present the findings and conclusions.