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QUARTERLY REPORT Lockeford Beacon 13975 East Highway 88 Lockeford, CA May 1994 1.0 INTRODUCTION In accordance with a request from Mr Robert Phillips of Lockeford Beacon, Geological Audit Semces, Inc (GeoAudit) has prepared this report summarizing monitoring activities performed during the second quarter of 1994 at 13975 East Highway 88 in Lockeford, California (the site) The monitoring was performed in accordance with San Joaquin County Public Health Services - Environmental Health Division (PHS/EHD) and Central Valley Regional Water Quality Control Board (CVRWQCB) guidelines 2.0 BACKGROUND 2.1 Site Description The site is located in Lockeford, California, a small rural community in northern San Joaquin County The site is located on the northwest corner of the intersection of State Highway 88 and Cherry Street (Figure 1) The site currently operates as Lockeford Beacon, a gasoline station The property is occupied by a single building, canopy and two filling islands Four underground storage tanks (UST's) are located on the northern portion of the property (Figure 2). p According Y to an assessment report b Applied GeoSystems (AGS) of Sacramento, two dry wells (French drains) were located on the property until July 1987 These wells provided drainage for run-off and wash-down from the product dispenser area 2.2 Monitoring Well Installation Prior to the sale of the Beacon station to the current property owner, Mr Robert Phillips, four 2-inch diameter groundwater monitoring wells (MW-1 through MW-4) were installed in June of 1987 to investigate soil and groundwater integrity The wells were installed by AGS Petroleum hydrocarbons were detected in soil samples from MW-1, MW-2 and MW-3, and in groundwater samples from all four monitoring wells No floating product was discovered in any of the wells 0-11-1 A.&Servet.[.c 1 ' L-1.6'd Se._Qn's-wsas 1