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f <br />�.9 <br /> PROBLEM ASSESSMENT REPORT <br /> January 1994 <br /> Art & Artists <br /> 204 E. Lodi Ave. <br />' Lodi, CA <br />' 1.0 INTRODUCTION <br /> Art & Artists is a commercial art store and frame shop owned by Mrs. Mary Lehr of Lodi, <br /> California. Mrs. Lehr retained Mr. James DeMera, of Mullen, Sullivan and Newton (MSN), <br /> Attorneys at Law, to represent the company and oversee environmental cleanup of <br /> hydrocarbon contamination associated with a former underground storage tank at the site, <br /> located at 204 E. Lodi Avenue (Figure 1). Mr. DeMera retained Geological Audit Services, <br /> Inc. (GeoAudit) in early 1992 to perform an assessment of the site. The assessment, <br />' involving installation of monitoring wells, quarterly monitoring, installation and testing of <br /> a vadose zone remediation well, and performance of a slug test to determine aquifer <br /> properties, has now been completed. This Problem Assessment Report provides the data <br /> necessary to determine the extent of contamination and design a suitable remediation <br /> system. The report was prepared in accordance with GeoAudit's Proposal No. 1030, dated <br /> September 15, 1993. Regulatory oversight during these investigations has been provided by <br />' San Joaquin County Public Health Services, Environmental Health Division (PHS/EHD). <br /> i <br />■ 2.0 SUMMARY OF INVESTIGATIONS <br />!; 2.1 Tank Removal <br /> I■i <br /> It is our understanding that a 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 a large building, near the building's southeast corner (Figure 2). The tank <br /> had failed an integrity test, and a soil sample collected from beneath the tank indicated that <br /> an unauthorized release of hydrocarbons had occurred. Total petroleum hydrocarbons as <br /> gasoline were detected at a concentration of 1,400 mg/kg, toluene was detected at a <br /> concentration of 270 mg/kg, and xylenes were detected at 18 mg/kg. PHS/EHD subsequently <br /> required investigation of groundwater quality at the site to determine whether groundwater <br /> had been impacted by the release. <br />■ <br /> s ABA PAM-28.9711.47 <br />■ <br />