FIELD DOCUMENTS - Laserfiche WebLink

Home Browse Search

adjacent to the Site. The guidelines used for the definition of hazardous materials/wastes are presented in the California Code of Regulations Title 22. The ISA services performed are presented as follows: • Conducted a pre-work meeting on December 15, 200), attended by Mr. Saiyed Ali with Caltrans and Mr. John Juhrend, Mrs. Rebecca Silva and Ms. Amy Hester of Geocon, to review the subject TO. • Reviewed the following documents to obtain information regarding the prevailing soil, geologic and groundwater conditions at the Site: - Geologic Map of the San Jose Quadrang e, prepared by the California Division of Mines and Geology (CDMG), dated 1966. Soils of San Joaquin County, California, prepared by the University of California, Berkeley, California, dated June 1952. - The Water Quality Control Basin Plan (Basin Plan)for the California Regional Water Quality Control Board, Central Valley Region, third edition 1994. • Geocon personnel performed an onsite reconnaissance on April 10, 2001 to attempt to identify visual indicators suggestive of the potential presence as of the date of the site reconnaissance, of hazardous materials/wastes at the Site. These indicators typically .include the presence of chemical containers and drums, waste disposal storage areas, industrial facilities, discolored surficial soils, electrical transformers that may c ntain polychlorinated biphenyls (PCBs), underground/aboveground storage tanks (USTs/A Ts), and areas conspicuously absent of vegetation. Global Positioning System (GPS) data was collected to document the locations of observed site features with the information provided herein in Caltrans compatible Geographic Information System(GIS)format. • Surveyed adjacent properties from public thorough fa es on April 10, 2001 to attempt to evaluate if adjacent properties possess facilities or structures that were likely to be occupied by entities that potentially use, store, generate, or dispose of hazardous material slwastes. • Conducted personal interviews with Hattie Poteet, Allen Shafer and Lino Cruz of Caltrans to determine the history of the Site. • Reviewed aerial photographs for the years 1968, 1974, 1979, 1986, 1992, 1996 and 1999 available from Caltrans and Pacific Aerial Surveys ir Oakland, California, to obtain information concerning the history of the Site. • Reviewed Sanborn Maps for the City of Tracy available from the Caltrans Library in Sacramento, California, for the years 1.892, 1897, 1907, 1911, 1913, 1921 and 1945. Coverage was not available for the Site. • Reviewed the United States Geological Survey I USGS) topographic map for the Tracy, California, Quadrangle dated 1954 (photorevised 1 81) to obtain topographic information and information relative to previous development of the ite and facilities in the vicinity of the Site. • Reviewed a Site Assessment Plus Report prepared for Caltrans by Vista Information Systems dated November 20, 2000. The Vista regulatory database search included the following information sources at a search distance of 1.6 kilometers (km)(I mile): Project No.58225-06-146 -2- May 25,2001