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� v <br /> �Tc <br /> A 5 S O C I A T E S I N C <br /> FINAL REMEDIATION PLAN <br /> FOR <br /> 1 SOIL AND GROUNDWATER REMEDIATION <br /> Stockton Fire Engine Company No. 2 <br />' 110 West Sonora Street <br /> Stockton, California <br />' 1.0 INTRODUCTION <br /> On Behalf of the City of Stockton, ATC Associates Inc has prepared this Final Remediation Plan <br />' (FRP)for the remediation of hydrocarbon-impacted soil and groundwater at Fire Engine Company No <br /> 2 in Stockton, California The hydrocarbon of primary concern is gasoline While diesel and methyl <br /> tertiary butyl ether (MTBE) have also been detected at the site, the extents and concentrations are <br /> generally less of a concern than gasoline This FRP includes a conceptual design for a groundwater air <br /> ' sparge (AS) system combined with a vapor extraction system {VES} to remediate gasoline <br />' hydrocarbons As a result of the gasoline remediation, it is anticipated that diesel and MTBE will also <br /> be remedlated, either directly or by enhanced natural attenuation The FRP has been prepared for <br />' review, comment, and approval by the California Regional Water Quality Control Board and the San <br /> Joaquin County Public Health Services, Environmental Health Division (PHS/EHD) prior to final <br />' design, installation, and operation of the proposed systems <br /> The subject site is located on the southwest corner of Commerce Street and Sonora Street in Stockton, <br /> California, as shown on Figure 1, Site Vicinity Map The location of the existing monitoring wells, <br />' vapor extraction wells, station building, former underground storage tanks (USTs), and other pertinent <br /> features are shown on Figure 2, Generalized Site Plan Between April 1, 1987 and October 28, 1993, <br /> isix USTs were removed from the site The location of tanks TI through T5 are shown on Figure 2 <br /> The exact location of tank T6 is not known, but the tank was located in the southeast portion of the <br /> site, near Commerce Street, and south of Church Street According to information provided to ATC <br /> by PHS/EHD, samples obtained from the location of T6 following overexcavation were below <br /> detection levels for gasoline hydrocarbons <br />' W 162574 01\CAP report doc 1 <br />