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V Stockton Unified School District Geological and Environmental Hazards Assessment CSU-Stanislaus,Stockton Campus School Site Page 2 (ASTM Standard E 1527-00, Section 5.5). The goal of the ESA is to identify recognized environmental #� conditions and historical recognized environmental conditions. The term recognized environmental condition means the presence, or likely presence, of hazardous substances or petroleum products on a property under conditions that indicate an existing release, a past release, or a material threat of a release of hazardous substances or petroleum products into structures on the property or into the ground, groundwater, or surface water of the property. The Term is not intended to include de minimis conditions that generally do not present a material risk of harm to public health or the environment and that generally would not be the subject of an enforcement action if brought to the attention of appropriate governmental agencies. Conditions determined to be de minimis are not recognized environmental conditions. V The term historical recognized environmental condition means an environmental condition that in the past would have been considered a recognized environmental condition, but which may or may not be imp considered a recognized environmental condition currently. The goal of this assessment is not to demonstrate that no hazardous materials are present at the site. The �. assessment is necessary, however, to complete "...all appropriate inquiry into the previous ownership and uses of the property consistent with good commercial or customary practice" [42 USC § 9601 (35) (B)]. The use of an environmental professional in the performance of this assessment will minimize and ,., manage risk of environmental difficulty, but it cannot completely eliminate the risk. '- The purpose of the additional environmental hazards assessment tasks and the geological hazards NW.W assessment was to assist the District in satisfying California Education Code § 17212, § 17213, and § 17215 and California Public Resources Code § 21151.8 for the evaluation of school sites. These additional requirements are intended by the State of California to compliment the ASTM Phase I ESA requirements. 1.2 SCOPE OF WORK 1.2.1 ASTM E 1527-00 Phase I Environmental Site Assessment The typical scope of work for an ASTM E 1527-00 Phase I ESA is described below. The following sections summarize the scope of work that Condor performed for the Phase I ESA, California Education 1,. Code and California Public Resources Code requirements, and the geological hazards assessment. An ASTM Phase 11 ESA was not included in this scope of work. The results of the Phase I ESA are used to determine the need for, and scope of, a Phase 11 ESA. k.. 1.2.1.1 Site Reconnaissance Condor conducted a site reconnaissance and prepared a general description of the site. Observations were made on the site, along the periphery of the site, and in areas common to the site and adjacent properties to assess if conditions suggest that hazardous substances are present on, or might migrate to, the site. Obvious terrain characteristics of concern, such as areas of distressed vegetation, ground stains, landfills, ,,,. depressions, and/or evidence of any below-grade tanks, were also noted. 1.2.1.2 Historical Information �.. - Historical information pertaining to the site was reviewed to learn about permits granted or citations issued (including any well and/or underground storage tank permits), prior uses of the site and properties i«1 CONDOR