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' • • Levine-Fricke-Recon Section:5 Date Initiated: September 23, 1996 Revision No.: 1 Date Revised:August 21, 1998 Page 9 of 34 ' As of the date of this HSP, vinyl chloride has not been detected at the Site, but has been included in this HSP because of the possibility that it may be present in soil and/or groundwater. ' As of the date of this HSP, chemicals most frequently detected in the soil and groundwater include: ' . PCE. The highest reported concentrations are 85 milligrams per liter (mg/1) in groundwater (May 1997); 63 milligrams per kilogram in soils beneath the former Norge Cleaners (October 1987); and 160 mg/1 in a sewage sample collected from ' manhole D (March 1985). TCE. The highest reported concentration is 0.91 mg/1 in groundwater (November 1997); TCE has not yet been detected in soil samples collected from Lincoln ' Center. • 1,2-DCE. The highest reported concentration is 1.9 mg/1 cis-1,2-DCE in ' groundwater (February 1998); 1,2-DCE has not yet been detected in soil samples collected from Lincoln Center. ' These chemicals and vinyl chloride (which has not been detected in groundwater samples collected from Lincoln Center at the time of the preparation of this HSP) are the primary chemicals of concern as defined by the Permanent Injunction. ' In addition, the nearby Chevron and Exxon service stations have histories of underground storage tank and/or line leakage. Therefore, the following chemicals may ' be encountered while performing field operations near the service stations: gasoline, diesel, used motor oil, and other retail petroleum hydrocarbons and their components, including benzene, toluene, ethylbenzene, and xylene. ' 5.1.1 Exposure Pathways of Concern ' Exposure pathways of concern for chemical compounds potentially present in soils and groundwater at the Site are inhalation of vapors and dermal contact with the chemicals in soil and/or groundwater. Dermal contact can be minimized by wearing protective ' equipment and following decontamination procedures listed in Section 6 of this HSP. To minimize inhalation hazards, action levels will be observed during the planned field activities. Site-specific action levels are presented in Section 8.3 of this HSP. ' 5.1.2 Chemical Descriptions ' Descriptions of the chemicals of concern for planned field activities at the Site are presented in Attachment F-1. Each chemical description includes available physical ' RIFSWP-AppF-Rev 1.04111:SRL Page F-9