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Phase II Site Assessment Work Plan CARANDO MACHINE WORKS 420 North Madison Street, Stockton, California 1.0. INTRODUCTION At the request of the City of Stockton Housing and Redevelopment,Advanced GeoEnvironmental, Inc. (AGE)has prepared this Phase II Site Assessment Site Assessment Work Plan for the property at 420 North Madison Street, Stockton,California(the site).The site has been utilized for industrial purposes for at least 40 years; at least one underground storage tank system was historically located on the property. The proposed work is being performed as part of due diligence for a property acquisition by the City of Stockton. The location of the site is illustrated on Figure 1. A plan of the site is illustrated on Figure 2. This work plan as required by the San Joaquin County Environmental Health Department(SJCEHD) for the procurement of a soil boring permit.For reference,this plan is in accordance with AppendixA to Tri-Regional Recommendations - Reporting, dated 30 August 1991, prepared by the Central Valley Regional Water Quality Control Board for the investigation of underground storage tank (UST) sites. 2.0. BACKGROUND The site is located in a topographically flat area of west-central Stockton, between Fremont Street and Steamboat Levee. The area surrounding the site has been utilized primarily for light-industrial and commercial purposes. For purposes of this Phase II, the City of Stockton parking lot immediately east of the Carando Machine Works facility, will be included in the investigation (Figure 2). The Carando property is nearly entirely developed as warehouse; the City of Stockton parking lot currently has no improvements beyond nominal landscaping. 2.1. HISTORICAL SITE USAGE A review of historical aerial photographs and Sanborn Fire Insurance Maps for the subject property indicates that at least a portion of the site has been utilized for industrial purposes (machine shop) for at least 50 years.In 1952,the north portion of the Carando site is listed as having a small service station with"gas and oils";it is possible that underground storage tanks may have been present. The City of Stockton parking lot appears to be an electrical shop. 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 Advanced GeoEnviron mental,Inc.