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Stockton Unified School District. Geological and Environmental Hazards Assessment CSU-Stanislaus,Stockton Campus School Site } Page. 11 . The databases specified by ASTM are commonly subject to infrequent and partial updating. This is especially true of those locations that no longer warrant inclusion in a given database. It is therefore not unusual to fail to find supporting documentation for locations identified in the ASTM specified-database search on file with local regulatory agencies. 510 E. Magnolia Street was identified as an ERNS and a RCRA Small Generator database location. The address for the entire parcel (APN 139-210-04) of which the site is only a portion '' 510 E. Magnolia :_Street. Northern and western portions of this approximately 103-acre parcel extend more than 118 mile iF .from the site. Therefore, it is misleading when viewing Figure 1 of Appendix B that there are no.ERNS k.and RCRA Small Generator points located within the 118-mile search radius, when in fact the site itself is .identified by each of these databases. Thus, the ERNS and RCRA Small Generator database information is included with the 1/8-mile radius search. 4.2 ADDITIONAL ENVIRONMENTAL RECORD SOURCES 4.2.1 San .Joaquin County Environmental Health Department. Eighteen addresses for properties were submitted to the San Joaquin County Environmental Health Division (EHD) and the non-confidential portions of their files were;researched. EHD provided files for eight of the 18 submitted properties identified in the government database search. The records for off-site properties were selected for review based on proximity to the site, Condor's familiarity with specific sites, and/or location with respect to the reported groundwater;gradient in the area. The of'site property files reviewed by Condor are identified below. �i Of the reviewed properties identified on the governmental database, four addresses are related to the site. These addresses also share APN 139-210-04 with the site. The addresses are as follows: 510 Magnolia ' Street, 1252 Stanislaus Street, 1202 N. American Street (no files were provided for this address), and 802 E. Flora Street (a CALFID database location). Several of the reviewed files contained information indicating that the groundwater flow directions are. east and northeast. The properties are listed by distance and direction below. 510 Magnolia Street/1252 Stanislaus Street is the location of the Stockton Developmental Center/WorldCom/MCl/CSU Stanislaus-Stockton Campus.. Condor's review of the regulatory files for this parcel indicates that several projects have transpired over time. In 1985, a portion of the parcel was designated for hazardous wastes, polychlorinated;biphenyls (PBCs), which were used in electrical transformers. This substance is no longer used on the parcel and there were no reported incidents related to its use. The parcel had 13 underground storage tanks (USTs) in the past, according to information in the file; twelve of the USTs were reported to have been removed between 1987 and 1998. Condor has numbered the tanks according to the system set forth in the EHD files for identification. Tank 43 was closed in place with a "no further action" letter issued and is located north of the site. The file pertaining to Tank#10, located along the eastern boundary of the site, indicated the need of further study due to soil contamination from diesel-range petroleum hydrocarbons. A 2002 groundwater report indicated that the groundwater flow direction is to the east. Because the former location of Tank 910 with identifiable soil and groundwater contamination is on the site property, it appears to pose a possible risk to the site. • 748 Union Street is the location of Santa Fe Railroad/Burlington Northern Santa Fe/Atchison Topeka & Santa Fe Railroad Company, which is approximately 900 feet east of the site. Condor's review of the files indicated a 1,000-gallon UST containing diesel was removed {f I i C CONDOR