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QUARTERLY REPORT <br /> Genova Bakery <br /> 749 North Sierra Nevada Street <br /> Stockton, California <br /> September 1994 <br /> 1.0 INTRODUCTION <br /> In accordance with a request from Mrs Donna Bruno, co-executor of the Rollen estate, <br /> Geological Audit Services, Inc (GeoAudit) has prepared this Quarterly Report for property <br /> located at 749 North Sierra Nevada Street in Stockton, California The project is being <br /> conducted for the estate of Angelo Rollen under the supervision of the San Joaquin County <br /> Public Health Services - Environmental Health Division (PHS/EHD) Three groundwater <br /> monitoring wells were sampled in September 1994 The Iocation of the site is illustrated in <br /> Figure I A plan of the site is illustrated in Figure 2 <br /> I2.0 BACKGROUND <br /> 2.1 Underground Storage Tank Removal <br /> The site is located at the corner of North Sierra Nevada Street and Flora Street in Stockton <br /> California The site currently operates as Genova Bakery The property is occupied by a <br /> single building One 350 gallon gasoline underground storage tank (UST)was removed from <br /> beneath the sidewalk, on the west side of North Sierra Nevada Street, in September 1989 <br /> Samples collected from beneath the UST indicated that an unauthorized release of <br /> hydrocarbons had occurred The PHS/EHD required investigation of the lateral and vertical <br /> extent of petroleum hydrocarbons <br /> 2.2 Hydrocarbon Impacted Soil and Groundwater Assessment <br /> Assessment of hydrocarbon impacted soil and groundwater at this site was completed by <br /> Groundwater Technology, Inc and reported in November 1987 and October 1988 Seven <br /> groundwater monitoring wells were installed on or near the site Free product was observed <br /> in MW-1 and MW-2 and was removed by representatives of Genova Bakery No <br /> contamination was detected in the other five wells <br /> The assessment of hydrocarbon impacted soil indicated that vadose zone contamination was <br /> restricted to the area immediately below the former UST location GeoAudrt installed a <br /> vapor well near the center of the contaminant plume for remediation A vapor extraction <br /> 0.a108-1 A.4 Sem.7 1 <br /> I- y <br /> Cks—8iI. Qwxq'"! <br /> I <br />