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Preliminary Site Assessment Work Plan August 1998 EMIL'S LIQUOR STORE 1405 California Street, Escalon, California 1.0. INTRODUCTION At the request of Mr.Robert Lease,Advanced GeoEnvironmental,Inc (AGE)has prepared this Work Plan for assessment of the Emil's Liquor Store located at 1405 California Street in Escalon, California(site). The location of the site is illustrated on Figure 1 -Location Map. A plan of the site is illustrated on Figure 2 - Site Plan. This Work Plan has been prepared as required by the San Joaquin County Public Health Services - Environmental Health Division (PHS-EHD) in a letter to Mr. Lease (property owner) dated 09 February 1998. Additionally,this work plan is prepared in accordance with PHS-EHD and Central Valley Regional Water Quality Control Board (RWQCB) guidelines for the investigation of underground storage tanks (UST) sites. The purpose of this site assessment is to evaluate the lateral and vertical extent of petroleum hydrocarbon impacts to soil and groundwater at the site. This Work Plan provides a description of the scope of work and procedures to be used in soil probe borings, soil and groundwater sample • collection and analysis, and soil boring abandonment. 2.0. BACKGROUND The site is at 1405 California Street, Escalon, California(Figure 1) on the southeast corner of Main Street(Highway 120) and California Street(Figure 2). The parcel is identified by the San Joaquin County Assessor as parcel number 227-070-31. 2.1. SITE DESCRIPTION The site is occupied by Emil's Liquor Store (aka Emil's Sport and Bait Shop or Emil's Liquor Sport Shop), which stored and distributed diesel fuel and unleaded gasoline for retail sale. The underground storage tank (UST) facility of the service station consisted of two 6,000-gallon unleaded gasoline USTs, one 2,000-gallon diesel fuel UST, one approximately 85-gallon waste oil tank, and one fuel dispenser island (Figure 2). The diesel fuel and gasoline USTs were located on the northwest corner of the site. The waste oil UST and the fuel dispenser island were located along the northern portion of the site approximately 25 to 30 feet east of the three fuel USTs. The surface of the site, surrounding the area of the former USTs and fuel dispenser island, was covered entirely with asphaltic-concrete. The site building is located east of the former fuel dispenser island. Arh,anced GeoEnviranmenial,Inc.