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PUBLIC NOTICE <br /> Fact Sheet <br /> Pending Case Closure for Leaking Underground Storage Tank Site <br /> Advanced GeoEnvironmental, Inc. (AGE), on behalf of the San Joaquin County Environmental Health <br /> Department (SJCEHD), invites public comment regarding the SJCEHD consideration to grant regulatory <br /> closure for a leaking underground storage tank (LUST) case on the Site identified below. <br /> SUBJECT SITE: James Blincoe Trust GeoTracker Global ID#(T10000005922) <br /> Site Address: 2431 East Mariposa Road, Stockton, California SJCEHD Site Code: 2118 <br /> PUBLIC COMMENT PERIOD: BEGINS: 01 April 2015 — ENDS: 01 June 2015 <br /> CASE SUMMARY: <br /> The SJCEHD in cooperation with the property owner and the responsible party, James Blincoe Trust, and <br /> environmental consultant, AGE, have evaluated soil conditions at the Site resulting from historical <br /> unauthorized releases of diesel from an underground storage tank (UST) system and from fuel}g <br /> eperatiens. The UST system, consisting of two USTs and associated piping, was removed from the Site <br /> in March 2014. On 22 May 2014, a total of approximately 436.7 tons of soil were loaded, transported and <br /> disposed at Forward Landfill in Manteca. <br /> DH d in coil t the base of the <br /> e)(Gavation, an AGE estimates 11,354.2 lbs-pounds of diesel were removed from the site during both the <br /> UST removal and soil excavation activities. Soil samples were collected to confirm the soil remediation. <br /> The highest concentrations of total petroleum hydrodrocarbons as diesel (TPH-d) were detected near the <br /> northeastern wall of the excavation, at a concentration of 2,600 milligrams per kilogram (mg/kg). A sample <br /> collected at the western end of the excavation also detested contained low concentrations of TPH-d at <br /> 110 mg/kg. TPH-d was also detected in the soil stockpile samples; while minor concentrations of volatile <br /> organic compounds were also detected in the soil stockpile samples. TPH-d was not detected in the soil <br /> collected at the base-bottom of the excavation. <br /> In July 2014, four soil borings were installed advanced near and within the formerta'k pinto investigate <br /> the diesel impact to the site, Samples were collected from the borings em <br /> apd- -4 at five-foot <br /> intervals between fifteen and forty feet bsg. A , TPH-diesel and BTEX compounds, as well as <br /> borings 131 thfGU9#43"wF0ng naphthalene were not detected in these soil samples. <br /> Therefore, it is believed that contamination is restricted to this site and did not migrate to neighboring <br /> properties. Groundwater samples were not collected <br /> a6 the depth to 9FG1_1A&AfAtPF is ever Ion fe9t below <br /> stead, however, groundwater was not likely significantly impacted by contaminants pertaining to <br /> this UST release. <br /> SJCEHD determined that the case meets the Low-Threat Underground Storage Tank Case Closure <br /> Policy general and specific media criteria for a low-threat site and ' <br /> soil w2s r� <br /> has concluded that the Site status is protective of the environment <br /> irnpaG <br /> and of human health foh�SJCEHD during the pubiure Site c comnd for <br /> inenapee d gaoff-site <br /> ydi gehe pending gaddressing <br /> case closure <br /> concerns submitted to t <br /> and receipt of notification that all case closure activities have been completed, the SJCEHD <br /> ire anticipates issuing a No Further Action Required letter for the subject Site. <br />