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g! d Phase I Environmental Site Assessment City of Stockton Multi-Modal Station/Shopping Center Page 15 Charles E Skobrak,Sr y 815 E. Miner Avenue There were two 500-gallon USTs at the site Both tanks contained leaded motor vehicle fuel There is a UST Program Tank Permit Application for each tank, which seem to indicate that the tanks were removed, but there is no other related documentation 835 E. Miner Avenue One 5,000-gallon unleaded gasoline UST and one 350-gallon waste oil UST were closed at the site according to an undated form Stockton Multimodal Station Site 936 E.Weber Avenue Soil Investigation Report Currently at the site are a record vault building and an adjacent shed, immediately south of the former UST location As of August 14, 1998, the two buildings were pending demolition The site was anticipated to be used as a new transportation building, the Stockton Rail/Multimodal Station In 1979, a 1,000-gallon gasoline tank was removed from the site A Phase II investigation in 1997 indicated that soil near the former UST was impacted by TPH-G TPH-G was detected at that time in one boring at ' concentrations of 17,000 and 0 31 mg/kg In a December 5, 1997 letter, the SJCPHS/EHD stated that the site had been placed in the local oversight program and that the Union Pacific Railroad was designated as the primary responsible party In May 1998, two borings were installed at the site in the vicinity of the former UST TPH-G was i detected at concentrations ranging from 160 to 1,200 mg/kg in the soil samples of one of the borings h F TPH-G was detected at 46,000 and 1,500 Rg/L in the two groundwater samples collected from the borings Based on these results, SJCPHS/EHD directed that the site be further assessed On February 29, 2000, SJCPHS/EHD requested that additional quarterly monitoring of the site be performed In a letter dated April 28, 2000, Environmental Resources Management (ERM) stated that they believed four quarters of monitoring was not needed, as the migration of contaminants is limited ERM recommended quarterly sampling of the down-gradient and annual sampling of all wells Groundwater analytical results for December 20, 2000 indicate that 1,2-DCA was detected in MW-2 4 2 1.2.2 Locations 100-500 feet from the site 331 N Aurora Two 5,000-gallon USTs were removed from the site The USTs contained solvent and leaded gasoline The site was closed by PHS/EHD ' Production Manufacturing ' 1000 E. Channel One 1,000-gallon kerosene UST was removed from the site The site was closed by PHS/EHD 888 E Lindsay The site was an old medical waste site,which received"no further action" status t, Valley Electric Company 945 E Lindsay One 1,000-gallon UST was removed from the site The UST contained unleaded product Upon removal no benzene, toluene, or total xylenes were detected in the soil Total lead was detected at 6 5 mg/kg F t, CONDOR