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Stockton Unified School District Geological and Environmentai Hazards Assessment CSU-Stanislaus,Stockton Campus School Site Page 13 Assessment Work Plan for the Former Hess Dubois Cleaners report dated February 12, 2002, groundwater flow direction is indicated to be toward the east and northeast. Due to its distance and direction from the site, this location does not appear to pose a significant risk to the site. 4.2.2 San Joaquin County Office of Emergency Services The San Joaquin County Office of Emergency Services (OES) had Hazardous Materials Management Plans for six entities at five different governmental database locations. I" • 510 E. Magnolia Street is the location of the PG&E (Aurora Substation)that has the following chernical inventory: insulating oil (5-49.9 ppm PCB). 0 510 E. Magnolia Street is the location of WorldCom (Magnolia) that has the following chemical inventory: sulfuric acid. • 1252 N Stanislaus Street is the location of Cal State University Stanislaus—Stockton that has the following chemical inventory: #2 diesel fuel, acetylene, argon, argon/CO2, Sanamine 8941, + oxygen, and unleaded gasoline. • 446 N. Aurora Street is the location of Aurora Body Works, Inc. that has the following chemical inventory: acetylene and oxygen. 4 • 242 N. Sutter Street is the location of MCTI(Sutter) -Primary that has the following chemical inventory: batteries and diesel fuel. + 348 W. Harding Way is the location of Lacelle Express Cleaners that has the following a. chemical inventory: perchlorethylene. • 1448 N. EI Dorado Street is the location of Auto Zone #5686 that has the following chemical inventory: used oil and sulfuric acid. 4.3 PHYSICAL SETTING SOURCES The source used for determining the physical setting of the site was the USGS Stockton West, California !.� 7.5-Minute Topographic Quadrangle Map, dated 1968 and photorevised 1987. The map shows the site is at an elevation between 15 and 20 feet above mean sea level (msl). 4.4 HISTORICAL USE INFORMATION FOR THE STTE Historical use information regarding the site was researched using aerial photographs and historical USGS topographic maps located at the Stockton Public Library in Stockton, California and Sanborn Fire 4r Insurance Maps available from an online source. Aerial photographs were reviewed for the years 1938, 1952, 1963, 3975, and 1983. In the 1938 �. photograph, a north/south road bisects the site property. An extensive building complex dominates the eastern half of the site property, and a portion of an orchard is located in the extreme southeastern corner of the site. Access to the building complex appears to be via the north/south road, a road that forms the northern site boundary, and a north-south road that parallels the eastern site boundary. A narrow strip of land, east of this road, completes the site; this strip of land appears to be a portion of a farm complex that extends eastward to the railroad tracks. The western half of the site appears to be undeveloped acreage with a large number of trees and traversed by two single lane roads: a northwest-oriented road traverses the northwestern quarter of the property and a gently curving road traverses east-west across the southwestern quarter of the site property with a north-south-oriented building located on the south side of the road. An unimproved road appears to form the western site boundary and an east-west paved-road is located along the southern site boundary. CONDOR