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QUARTERLY REPORT May 1995 Lockeford Beacon 13975 East Highway 88 Lockeford, California 1.0. INTRODUCTION In accordance with a request from Mr Robert Phillips of Lockeford Beacon, Advanced GeoEnvironmental, Inc (AGE) has prepared this Quarterly Report summarizing field activities performed during the second quarter of 1995 at 13975 East Highway 88 in Lockeford, California (Figure 1) The scope of work included the drilling of two soil borings and collection of"grab" ground water samples. One of the borings was completed as a vadose zone remediation well Quarterly ground water monitoring was also performed in accordance with Tn Regional Board guidelines for investigation of underground storage tank(UST)site The location of the site is illustrated on Figure 1 A plan of the site is illustrated in Figure 2 2.0. BACKGROUND 21 SITE DESCRIPTION The site is located in Lockeford, California, a small rural community in northern San Joaquin County at 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 USTs are presently located on the northern portion of the property (Figure 2) According to an assessment report by Applied GeoSystems (AGS) of Sacramento, two dry wells (French drams)were located on the property These wells provided drainage for run-off and wash- down from the product dispenser area It was reported by AGS that the dry wells were destroyed in July 1987. 2 2 SOIL BORING AND MONITORING WELL INSTALLATION Four ground water monitoring wells(MW-1 through MW-4) were installed by AGS in June of 1987 to investigate soil and groundwater integrity_ Total volatile hydrocarbons (TVH) were detected in soil samples from MW-2 at concentrations of up to 50 51 parts per million Less than 1 ppm TVH were detected in soil samples from MW-1 and MW-3