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Subsurface Investigation Report HUGHES PROPERTY 322 and 400 North Sacramento Street, Lodi, California 1.0. INTRODUCTION At the request of Mr. James V. DeMera of Mullen, Sullivan & Newton, Advanced GeoEnvironmental, Inc. (AGE) has prepared the enclosed Subsurface Investigation Report for 322 and 400 North Sacramento Street, Lodi, California (site). The work was performed as part of a pending property transfer. The scope of work included the advancement of six soil borings, collection and analysis of soil samples, and preparation of this report. The location of the site is — illustrated on Figure 1. A plan of the site is illustrated on Figure 2. This report has been prepared in accordance with guidelines issued by the Central Valley Regional Water Quality Control Board(CVRWQCB)for the subsurface investigation of underground storage tank(UST) sites. 2.0. BACKGROUND The subject property,located at 322 and 400 North Sacramento Street in the city of Lodi, California, is situated in an area of mixed commercial and light industrial use. The property (400 North Sacramento Street) was formerly occupied by Hughes Spray Chemical and Brea Agricultural Services from the 1920s until the early 1980s. The southern parcel (322 North Sacramento Street) was reportedly utilized as an automotive towing and wrecking yard for a number of years. Both properties are presently undeveloped. 2.1. REGIONAL GEOLOGIC/HYDROGEOLOGIC SETTING The property is situated within the Great Valley Geomorphic Province of California, a large, elongate, northwest trending, asymmetric structural trough. The Great Valley Province has been filled with thick sequences of sediment ranging in age from Jurassic to Recent,creating a nearly flat — lying alluvial plain that extends from the Tehachapi Mountains in the south to the Klamath Mountains in the north.The western and eastern boundaries of this province are the California Coast Range and the Sierra Nevada,respectively.Rocks composing the basement complex of the province have not been completely defined but are believed to be of metamorphic and igneous origins. The northern and southern portions of the Great Valley Province have been designated the Sacramento and San Joaquin Valleys, respectively. The Modesto, Riverbank, and Turlock Lake Formations and overlying Recent alluvium are the principal source of domestic ground water in the 13,500-square-mile San Joaquin Valley Ground Water Basin (Basin 5-22). This basin is drained primarily by the San Joaquin River. The nearest surface water feature in the vicinity of the property is the Mokelumne River,approximately 1/2-mile Advanced GeoEvironmental,Inc.