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11) 0, <br />C <br />Revised Remedial Action Work PIan <br />April 1997 <br />NOMELLINI CONSTRUCTION COMPANY <br />1045 West Charter Way <br />Stockton, California <br />1.0 INTRODUCTION <br />In accordance with the request of Nomellini Construction Company, Advanced GeoEnvironmental, <br />Inc (AGE) has prepared this revised Remedial Action Work Plan (RAWP) detailing design of a <br />modified remediation system for the "core" petroleum hydrocarbon -impacted area at 1045 West <br />Charter Way, Stockton, California (the site) The location of the site is illustrated on Figure I - <br />Location Map A plan of the site is illustrated on Figure 2 - Site Plan <br />The revised RAWP is prepared in response to a request by the San Joaquin County Public Health <br />Services - Environmental Health Division (PHS-EHD) and in accordance with Central Valley <br />Regional Water Quality Control Board (CVRWQCB) guidelines for corrective action at leaking <br />underground storage tank sites <br />0 20. BACKGROUND <br />2 1 SITE LOCATION AND DESCRIPTION <br />The site is located at 1045 West Charter Way in an industrial area of southwest Stockton, <br />approximately one-half mile west of Interstate 5 along West Charter Way (Figure 1) The site is <br />further described as being located northwest of Section 10, Township I North, Range 6 East, Mount <br />Diablo Base and Meridian <br />The site is occupied by a rectangular warehouse building structure utilized by various industrial and <br />commercial businesses Surrounding land use is light industrial/commercial A truck stop is located <br />immediately east of the site, the property immediately west of the site is operated by Sunrise <br />Sanitation (Figure 2) <br />22 PREVIOUS INVESTIGATIONS <br />The following is a brief summary of previous investigation for underground storage tanks (USTs) <br />formerly located at the site <br />• In August 1988, two 1,000 -gallon gasoline USTs were removed from the site Following tank <br />removal, soil samples were collected beneath both tanks and submitted to a state certified <br />iIaboratory for analysis of petroleum hydrocarbons Analytical results of soil samples collected <br />from beneath the USTs indicated that substantial petroleum hydrocarbon concentrations were <br />