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' Preliminary Investigation and Evaluation Report FRANK A. MORENO TRUST PROPERTY 5279 East Cherokee, Stockton,California ' 1.0. INTRODUCTION ' In accordance with the request of Mr. Greg Moreno of Frank A. Moreno Trust Property,Advanced GeoEnvironmental, Inc., (AGE)has prepared this Preliminary Investigation and Evaluation Report (PIER) for 5279 East Cherokee Road (the site), Stockton, California. The scope of work included ' the advancement of one soil probe boring to collect soil samples for laboratory analysis and to assess the vertical extent of petroleum hydrocarbon-impacted soil if encountered. Upon refusal of the soil probe at ten feet below surface grade (bsg), a truck-mounted drilling rig was mobilized for ' further sampling to a maximum depth of thirty feet bsg. The second boring was located one foot north of the probe boring location. The location of the site and its surroundings are illustrated on Figure 1. Major features on the site and boring locations are illustrated on Figure 2. ' 2.0. BACKGROUND The site has operated as an agricultural farming facility for at least 50 years. Several structures, ' including a residence, a mobile home,a garage and storage facility and a warehouse are located on the property. The surrounding property is agricultural. ' 2.1. UNDERGROUND STORAGE TANK REMOVAL One 500-gallon gasoline underground storage tank(UST)was formerly located on the property. The UST was located at the north end of the garage/storage structure and was installed sometime during the 1950s. ' According to representatives of the Moreno Trust, the UST was removed from the site circa 19� ' The UST was exempt from permitting due to it's farm tank status. Hydrocarbon odors was noeby representatives of the Moreno Trust and no soil samples were collected during the UST removal. ' 2.2. REGIONAL GEOLOGIC SETTING ' The site area is within the Great Valley Geomorphic Province (GVGP) of California, a large, elongate, northwest trending structural trough. The GVGP is subdivided into two major divisions designated the Sacramento and San Joaquin Valleys, which have been filled to the present elevation ' with thick sequences of sediment ranging in age from Jurassic to present day, creating a nearly flat- Advanced GeoEnvironmental, Inc.