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` PRELIMINARY INVESTIGATION AND EVALUATION REPORT December 1995 Burkhardt Property 5154 Hogan Lane Lodi, California 1.0. INTRODUCTION AND SCOPE OF WORK In accordance with the request of Mr. Kelly Olsen,Advanced GeoEnvironmental, Inc., (AGE) has prepared this Preliminary Investigation and Evaluation Report (PIER) for the property located at 5154 Hogan Lane, Lodi, California. The scope of work included the excavation of hydrocarbon- impacted soil and advancement of four soil probe borings near the former underground storage tank (UST) area. The location of the site is illustrated in Figure 1 -Location Map. A plan of the site is illustrated on Figure 2 -Site Plan. The investigation was performed in accordance with the guidelines of both the San Joaquin County ` Public Health Services-Environmental Health Division(PHS-EHD) and the Central Valley Regional Water Quality Control Board for investigations of UST sites. 2.0. BACKGROUND 2.1. SITE LOCATION The site is located at 5154 Hogan Lane southeast of Lodi, in San Joaquin County, California, east of Highway 99 between Harney Lane and Armstrong Road. The site is in the southwest quarter of Section 19, Township 3 North,Range 6 East,Mount Diablo Base & Meridian (MDB&M). Land use in the immediate vicinity of the site is rural residential/agricultural. 2.2. UNDERGROUND STORAGE TANK REMOVAL It is our understanding that one gasoline UST and one diesel UST were removed from the property in 1992. Soil samples were collected from beneath both USTs and analyzed for total petroleum hydrocarbons quantified as gasoline and diesel (TPH-g and TPH-d), volatile aromatics (benzene, toluene, ethyl benzene, and xylene: BTE&X) and for total lead. TPH-g and BTE&X were present ` in soil samples collected from beneath the former gasoline UST. Analytical results of soil samples are summarized in Table 1. The UST excavation was backfilled with soil removed during the tank removal.