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1 <br /> QUARTERLY REPORT <br /> Art & Artists <br /> 204 East Lodi Avenue <br />' Lodi, CA <br /> October 1994 <br /> 1.0 INTRODUCTION <br />' In accordance with a request from Mr. James DeMera of Mullen, Sullivan & Newton, <br /> personnel from Geological Audit Services, Inc. (GeoAudit) have performed quarterly <br /> groundwater monitoring procedures for October 1994 at 204 East Lodi Avenue in Lodi, <br /> California (the site). The location of the site is illustrated in Figure 1. A plan of the site is <br /> illustrated in Figure 2. <br /> 2.0 BACKGROUND <br /> 2.1 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 /> Sampling performed during this phase of the investigation indicated that the impacted soil <br /> was limited to the vicinity of the former tank. No petroleum hydrocarbons were present in <br /> soil samples from MW-2 or MW-3. However, high concentrations of hydrocarbons were <br /> present in soil samples from MW-1. Petroleum hydrocarbons were detected in groundwater <br /> ' from all three wells. <br /> 0w1.00l Audh S.Hm.lee 1 <br /> . y,a An:a axsnaswi.�� <br /> 1 <br />