ARCHIVED REPORTS XR0001807 - Laserfiche WebLink

Home Browse Search

R EL C' URS FFR 2 3 7005 I=P~'VIPON�I PMT HFALTH February 17, 2005 PEPUItIT/SERVICES Ms Margaret Lagono, Supervising REHS 00760 Site Mitigation Unit 06 a4 San Joaquin County Environmental Health Department 304 E Weber Avenue, Third Floor Stockton, CA 95202-2708 Re. Site Assessment and Closure Request Report Former ARCO Service Station No. 764 225 S. Cherokee Lane t Lodi, California Dear Ms Lagono URS Corporation Americas (URS), on behalf of Atlantic Richfield Company (ARCO—a BP affiliated company), has prepared this report to document the site assessment activities conducted at former ARCO Service Station No 760, at 225 S Cherokee Lane, Lodi, California(Figure 1) URS also is requesting that this site be considered for closure The assessment was conducted in response to a letter from the San Joaquin County Environmental - Health Department (SJCEHD) dated November 17, 2003, requesting evaluation of the lateral and vertical extent of 1,2-dichloroethane (1,2-DCA) in the groundwater beneath the site Assessment activities were conducted in accordance with the soil and groundwater sampling scope of work described in the Site Assessment Report and Workplan for Additional Assessment submitted by URS on October 11, 2004, to the SJCEHD The workplan was approved on October 14, 2004 Soil boring permits, correspondence from SJCEHD, and encroachment permits from the City of Lodi are included in Attachment A The following pages present site background, assessment activities and findings, and conclusions and recommendations SITE BACKGROUND The site is a former ARCO gasoline station, with an AM/PM nuni-mart, located at 225 S Cherokee Lane in Lodi, California (Figure 1) The site is bound by an alley to the north,Lodi Avenue to the south, residential property to the west, and S Cherokee Lane to the east (Figure 2) As part of divestment activities, under URS supervision, all underground storage tanks (USTs), dispensers and associated piping were removed in August 2002 The site is currently operated as a used car dealership Analytical results of groundwater samples collected from three on site monitoring wells between October 2002 and July 2003 identified the presence of 1,2-DCA at the site On March 22 and 23, 2004, phase I of a 2-phase site assessment was conducted Three off-site vertical soil borings ( B-25, B-26, and B-27) were advanced to depths of 65 feet below ground surface (bgs), and depth-discrete soil and grab groundwater samples were collected to assess the western and southern lateral extent of 1,2-DCA in groundwater beneath the site Analytical data from the March 2004 investigation determined that the western extent of 1,2-DCA-impacted groundwater was not yet defined and that more sampling would be f' h ss URS Corporation Crown Corporate Center 2870 Gateway Oaks Drive Suite 300 Sacramento CA 95833 Tel 916 679 2000 Fax 916 679 2900 K 1WprocessV5 BP ARCb10076012004 Assessment1760 additional assessment report 04 doc