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R h Phase I Environmental Site AsseSSrncnt City of Stockton Multi-Modal Station/Shopping Center Page 37 7 0 FINDINGS r Condor identified three recognized environmental conditions on the site and adjoining properties (see Figure 4, Appendix A) `'� • The property at 145 N Grant Street (730 E Channel Street), the former Stockton Metropolitan Transit District facility may contain USTs San Joaquin County PHS/EHD records indicate 10 USTs were present on the property in 1985 Two USTs were removed in 1987, but there are no records u indicating the status of the remaining eight USTs The existence of USTs on site, both past and present, represents a potential risk to soil and groundwater i The 1940 Polk City Directory for Stockton indicates a gas station was located at 802 E Miner Avenue No other records were found pertaining to the gas station at this address There was no listing for this address in the 1945 city directory The type and number of fuel tanks installed at the F gas station, and their disposition after the removal of the gas station, is not known If USTs are still on w site, then they represent a potential risk to soil and groundwater + A groundwater investigation is currently in progress at 308 N Grant Street This property is located north of the site across Miner Avenue Records indicate high concentrations of contaminants are present in the groundwater at this property It is possible,though not known,that contaminants in the groundwater beneath this property have migrated to the southeast and are now present in groundwater beneath the site Condor identified two historical recognized environmental conditions on the site k A cabinet and paint shop was located at 930 E Miner Avenue (248 N Aurora Street) through the 1940s and 1950s During the early- to mid-1960s a sign company was at this location There is no record of how waste paints and solvents were disposed from these businesses If historical disposal methods were used on site,there is a potential risk for soil and groundwater contamination + Auto repair and auto body shops have been located at several site properties for many years Addresses of former and current auto repair and body shop businesses include 122, 204, and 210 N Grant Street, and 729, 811, 815, 829, 843, and 915 E Weber Avenue While current businesses appear to be disposing of waste materials in the proper manner, there is no record of how waste disposal at these businesses was conducted in the past Typical wastes for these facilities include motor oil, antifreeze, brake fluid, paint, and solvents If historical disposal methods were used on site, there is a potential risk for soil and groundwater contamination Condor has identified four de mammas conditions on the site and nearby properties • Midway Supply Company at 931 E Weber Avenue maintains limited quantities of hydrochloric acid and hydrofluoric acid on the property for its manufacturing processes A spill prevention and response plan is in place at the facility The release of these chemicals to the environment is unlikely, so Condor considers this to be a de mammas condition • A 1,000-gallon UST that contained unleaded gasoline was removed from the property at 930 E Miner Avenue in 1993 Laboratory analysis of two soil samples collected from the tank excavation at I 1 feet below ground surface indicated that benzene, toluene, ethyl benzene, total xylenes, and TPH-G were not detected in either sample The site received a "no further action" notification on December 17, 1993 Condor considers this to be a de mammas condition as additional risk to the environment is unlikely A 4 t� CONDOR