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KLEINFELDER 4 ASSESS T OF SURFACE SOIL CONTAMINATION During the period of time when A/C pipe was manufactured at the J-M Mfg, plant, stray asbestos fibers apparently migrated from the confines of the buildings where the manufacturing operations occurred to areas surrounding the buildings. The presence of these fibers is a concern to the CVRWQCB as a potential source of asbestos in surface water runoff. In cooperation with the CVRWQCB, J-M Mfg. conducted a series of investigations to assess the extent of asbestos in surface soil. This chapter contains a discussion of previous investigations and the most recent investigation completed in the fall of 1991. 4.1 PREVIOUS INVESTIGATIONS Data from two previous site investigations indicated that asbestos contamination in surface soils may be present. 4.1.1 SWAT Investigation The SWAT report did not include a surface soil asbestos assessment. The SWAT report, however, did discuss the possibility of surface soil asbestos contamination as being a potential cause of elevated asbestos levels in surface water collected from the canal that bisects the J-M Mfg. site. 4.1.2 Soil Investigation In. a site inspection report dated October 1987, the CVRWQCB requested an assessment of surface soils for stray asbestos. Asbestos was thought to have possibly spilled onto surface - soils during past use of haul roads, shipping stations, and other past use areas. As a part of the closure activity and in response to the CVRWQCB request, Kleinfelder performed a limited surface soil investigation. Thirty surface soil samples were collected along former haul roads and former activity areas on April 26, 1990. The sampling locations are shown on Plate 4-1. Summary Tables 4-1. and 4-2 give a description of the sample locations and the results of polarized light microscopy (PLM) analysis. The CR14-92-12 Page 9 of 39 24-220109-F09 Copyright 1992 Kleinfelder, Inc.