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i I • Preliminary Investigation and Evaluation Report FLAME LIQUOR 1301 West Kettleman Lane,Lodi, California 1.0. INTRODUCTION AND SCOPE OF WORK At the request of Mr Pete Graffigna,Advanced GeoEnvirorimental, Inc (AGE) has prepared this Preliminary Investigation and Evaluation Report (PIER) for Flame Liquor located at 1301 West Kettleman Lane,Lodi, California(site) The location of the site is illustrated in Figure 1, a site plan Iis shown in Figure 2 The scope of work was performed in two phases Phase I included the advancement of five soil probe I borings in the area of the former and newly upgraded underground storage tanks(USTs)to evaluate the lateral and vertical extent of petroleum hydrocarbons in soil and ground water Phase H was initiated after petroleum hydrocarbon-impacted soil and ground water were confirmed by laboratory analysis of samples collected during the first phase Four soil borings were advanced and completed as ground water monitoring wells This report is prepared in accordance with guidelines established by the California Regional Water Quality Control Board-Central Valley Region(CRWQCB-CVR) Ifor investigation of underground storage tank(UST) sites i2.0. BACKGROUND ' The property is presently occupied by Flame Liquor,which consists of one story mini-mart structure, gasoline fueling facility and car wash The gasoline fueling facility consists of three USTs, four dispenser islands and a canopy The car wash is located along the western margin of the site On 09 March 1998,AGE advanced four soil probe borings to investigate the soil in close proximity to the USTs for petroleum hydrocarbon-impact to soil The fuel oxygenate methyl tertiary-butyl ether (MTBE) was detected in soil sample BI-20' by EPA Method 8020 at a concentration of 0 25 milligrams per kilogram ( mglkg) Sample B1-20' had been collected from the northeast end of UST#3 at a depth of 20 feet below surface grade (bsg) A summary of soil samples analyzed are presented in Table 1 Boring locations are shown on Figure 2 On 30 June 1998 the USTs were removed from the site Grayland Environmental of Davis, ' California, collected soil samples from the bottom of the UST excavation, former dispenser island area,and soil stockpiles Fuel oxygenates MTBE and tertiary-butyl alcohol (TBA)were detected in soil sample S-17-T2s by EPA Method 8260M at a maximum concentration of 9,800 micrograms per ' kilogram (µg/kg) and 31,000 gg/kg, respectively TBA was detected in soil sample S-4-FDI, collected from the dispenser island area,at a concentration of 75 gg/kg Total xylenes were detected m sample S-5-FD2 by EPA Method 8020 at a concentration of 0 012 mg/kg MTBE was not detected rin dispenser island samples at concentrations above the laboratory reported limit IAdvanced GeoEnvironmentai,Inc 1