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QUARTERLY REPORT <br /> Art & Artists <br /> ' 204 East Lodl Avenue <br /> Lodi, CA <br /> ' June 1994 <br /> 1.0 INTRODUCTION <br /> ' In accordance with a request from Mr. James DeMera of Mullen, Sullivan & Newton, <br /> Geological Audit Services,Inc. (GeoAudit)has prepared this report summarizing monitoring <br /> activities performed during the second quarter of 1994 at 204 East Lodi Avenue in Lodi, <br /> I California (the site). Groundwater depths were measured in all monitoring wells and <br /> samples were collected from six monitoring wells. The purpose of the field work was to <br /> monitor the lateral extent of petroleum hydrocarbons in groundwater. The location of the <br /> site is illustrated in Figure 1. A plan of the site is illustrated in Figure 2. <br /> 2.0 BACKGROUND <br /> 2.1 4 Tank Removal <br /> ' It is our understanding that one 550-gallon underground storage tank (UST) was removed <br /> from this site in January 1987 by Thorpe Oil, Inc. The tank contained leaded gasoline, and <br />' was located inside the on-site structure, near the building's southeast corner (Figure 2). The <br /> UST had failed an integrity test, and a soil sample collected from beneath the tank indicated <br /> that an unauthorized release of hydrocarbons had occurred. Total petroleum hydrocarbons <br />' (TPH as gasoline) were detected at a concentration of 1,400 mg/kg; toluene was detected <br /> at a concentration of 270 mg/kg; and xylenes were detected at 18 mg/kg. The San Joaquin <br /> County Public Health Services - Environmental Health Division (PHS/EHD) subsequently <br />' required investigation of groundwater quality at the site to determine whether groundwater <br /> had been impacted by the release. <br />' 2.2 Initial Investigation <br />' Three soil borings were drilled in July 1987 and completed as MW-1, MW-2, and MW-3. <br /> The sampling performed during this phase of the investigation indicated that the impacted <br /> soil was hm ted to the vicinity of the former tank. No petroleum hydrocarbons were present <br /> in soil samples from MW-2 or MW-3, but high concentrations were present in soil samples <br /> 'bow A1,0Senor,].c <br /> AN t Abs QR46WI-47 1 <br />