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1 <br /> f <br /> t QUARTERLY GROUND WATER MONITORING REPORT ` <br /> March 1995 <br /> Nomellini Construction Co. <br /> 1045 West Charter Way <br /> 1d <br /> Stockton, California - <br /> JUL 12 1995 <br /> , <br /> INTRODUCTION AND SCOPE OF WORK ENN 1S �gC HEq� 3 <br /> vrCES <br /> - ' At the request of Mr Dante John Nomellim of Nomellim Construction Co (NCC), Geological Audit <br />' Services, Inc (GeoAudit) performed ground water monitoring preocedures and collected`ground <br /> water samples at 1045 West Charter Way in Stockton, California (Figure 1 - Location Map) <br /> r Advanced GeoEnvironmental, Inc (AGE) was subsequently retained by Mr Nomellim to complete <br /> the Quarterly Report on field data collected by GeoAudit <br /> The quarterly monitoring is performed in accordance with San Joaquin County Public Health Services <br /> r , <br /> - Environmental Health Division (PHS-EHD) and Central Valley Regional Water Quality Control <br /> Board (CVRWQCB)guidelines for investigation of underground storage tank (UST) sites <br /> 2.0. - BACKGROUND <br />�i21 SITE LOCATION <br /> 4 <br /> The site is located approximately one-half mile west of Interstate 5 on West Charter Way (State <br /> ` Route 4) in Stockton, California(Figure 1) Surrounding land use is light industrial/commercial A <br /> truck stop is located immediately east of the site, the property immediately west of the site is operated <br /> by Sunrise Sanitation A plan of the site is depicted in Figure 2 <br /> 22 UNDERGROUND,STORAGE TANK REMOVAL <br /> In August 1988, two 1,000-gallon underground storage tanks (USTs) were removed from the site <br /> The tanks were used for the storage of regular and unleaded gasoline Analytical results of soil <br /> samples collected from beneath the gasoline USTs indicated that an unauthorized release of <br /> W hydrocarbons had occurred <br /> The tank area was re-excavated in November 1988 Soil was removed from the former UST area to <br /> I a depth of 19 feet Soil samples were collected from the excavation and screened for organic vapors h <br /> using a, photo-ionization detector'(PID) Organic vapor,readings indicated that petroleum <br /> hydrocarbons were present at depths in excess of 19 feet Therefore, the excavation was backfilled - <br /> 'and a site assessment was performed The tank removal and excavation procedures were described r <br /> by ICleinfelder in reports dated 22 September 1988 and 14 June 1989 <br /> f <br /> a <br /> - j - <br />