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Limited Subsurface Investigation Report STOCKTON ROYAL THEATER 1825 Pacific Avenue, Stockton, California 1.0. INTRODUCTION At the request of Mr. James Byrd, of Stockton Royal Theater,Advanced GeoEnvironmental, Inc. (AGE)has prepared the enclosed Limited Subsurface Investigation Report for 1825 Pacific Avenue, Stockton, California(site). The purpose of this investigation was to assess the lateral and vertical extent of petroleum hydrocarbon impacted soil and ground water at the site. The scope of work included establishment of four soil borings,collection and analysis of soil and `grab' ground water samples and preparation of this report of findings.The location of the site is illustrated on Figure 1. A plan of the site is illustrated on Figure 2. 2.0. BACKGROUND The site, located at 1825 Pacific Avenue in the city of Stockton, California,is situated in an area of mixed commercial and light industrial use.The property is presently occupied by the Stockton Royal Theater.One large-screen and three smaller-screened theaters are located at the site.A small parking area is located at the south end of the property. 2.1. BACKGROUND/SITE HISTORY Research of historical fire insurance maps(Sanborn)of the site and surrounding area,indicates that the southern portion of the site was occupied by a gasoline service station from approximately the 1950s until the early 1970s (when the southern addition to the theater was constructed). No record of removal of the USTs was available during historical research performed by AGE. 2.2. REGIONAL GEOLOGIC/HYDROGEOLOGIC SETTING The site is situated within the southern portion of the Great Valley Geomorphic Province of California, a large, elongate, northwest trending, asymmetric structural trough; the northern and southern portions of the Province have been designated the Sacramento and San Joaquin Valleys, respectively.The Province is bordered by the Coast Ranges to the west,the Klamath Mountains and Cascade Range to the north, and the Sierra Nevada to the east. The Great Valley has been filled with sediments derived from both marine and continental sources. Thickness of the sedimentary fill ranges from thin veneers along the valley edges to more than 20,000 feet in the south central portion of the valley.The sedimentary formations range in age from Jurassic to Recent,with the older deposits being primarily marine in origin and the younger deposits being primarily continental. Continental-derived sediments were primarily deposited in lacustrine, Advanced GeoEnvironmental,Inc.