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I <br /> : <br /> Stockton Unified School District <br /> Geological and-Environmental Hazards Assessment <br /> School Site <br /> CSU-Stanislaus,Stockton Campus Sc <br /> s <br /> 1 . • Page 28 <br /> • The application of herbicides and the possible historical application and accumulation of pesticide <br /> residuals on the site. <br /> • The continuing subsurface investigation of an underground storage tank formerly located at the <br /> 1 ' site. <br /> • The possibility of PCB-containing material associated with the hydraulic elevator located in a <br /> ' storage building on the site. <br /> This assessment has revealed three historical recognized environmental conditions in connection with the <br /> site: <br /> 1 • The past use of PCB-containing fluid in the electrical switching-stations. <br /> • The potential presence of hazardous substances in the steam-tunnel system. <br /> • The potential presence of hazardous substances in the demolition debris located in the fill beneath <br /> the current track and field. <br /> This assessment has revealed three de minimis con <br /> { ._ drttons in connection with the site: <br /> • The stockpiles of soil with concrete debris stored on the southeastern corner of the site. <br /> • The presence of a sewer screening station on the site. <br /> • The PG&E electrical distribution station using PCB-containing oil located on the site. <br /> The additional requested service information is discussed and revealed in Sections 7.0 and 8.0. <br /> 11.0 DEVIATIONS <br /> This Phase I ESA was performed by Condor according to the scope and limitations of ASTM Practice E <br /> 1527-00, except for the following: <br /> • The District did not obtain a Preliminary Title Report. <br /> 12.0 <br /> REFERENCES <br /> SITE AND VICINITY GENERAL CHARACTERISTICS <br /> 1. Site reconnaissance <br /> 2. Stockton West, California, U.S. Geological Survey 7.5-Minute Topographic Quadrangle Map dated 1968 and <br /> pltotorevised 1987 <br /> 3 - <br /> } CURRENT USES OF THE ADJOINING PROPERTIES <br /> 3. Site reconnaissance <br /> SPECIALIZED KNOWLEDGE <br /> 4. 4dditional Soil and Groundwater Investigation and Monitor Well Installation Report: California State University <br /> Stanislaus Multi-Campus Regional Center, Stockton, CSI, Condor Earth Technologies,Inc.,dated January 11,2002. <br /> HISTORICAL USE INFORMATION ON SITE AND ADJOINING PROPERTIES <br /> 5. Aerial photos from the San Joaquin County Surveyor's Office <br /> �} 6. Stockton West, California, U.S. Geological Survey 7.5-Minute Topographic Quadrangle Maps for the following <br /> years: 1952, 1968, 1976, and 1987.The last two reaps are dated 1968 and then photorevised: <br /> 7. Polk City Directories for the following years: 1937, 1942, 1947, 1953, 1957, 1964, 1967 1974, 1979, .1984, <br /> 1 1990, 1999 <br /> S. Sanborn Insurance Maps located on-line at http:/lwww.Jib.berkely.edu/EART/sanbom. Dated as 1895, 1917, <br /> and 1950,respectively. http://www.Jib.berkely.edu/EART/sanbom. <br /> +� CONDOR <br />