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h� KLEINFELDER 4 INVESTIGATIVE ACTIVITES 4.1 PERMITTING AND PRE-FIELD ACTIVITIES It has been Kleinfelder's experience that this workplan contains sufficient detail and information to be submitted to San Joaquin County Environmental Health Department (EHD) to review and approve a boring/well permit. Kleinfelder can prepare a boring permit application, and a proposed boring location map for submittal along with this workplan to EHD. Additionally, the permit must be approved prior to advancing the borings. Following obtaining approval from the € EHD, Kleinfelder will commence with the actual assessment. Please note that Kleinfelder can j not commence with the actual field work until the proposed scope of work and the EHD permit have been approved. Additionally, EHD will bill Del Monte Foods for their time spent on the project. The Geoprobe subcontractor will contact Underground Service Alert 48 hours prior to conducting fieldwork to notify local utilities of our proposed subsurface assessment. 4.2 SOIL SAMPLING & ANALYSIS The Geoprobe investigation will be focused on the former car wash facility located near the C eastern portion of the Disco site. The investigation will be a limited soil assessment of the soils directly below the footprint of the former car wash. The soil probes will be advanced using a truck mounted Geoprobe rig. The Geoprobe utilizes a pneumatically driven stainless steel push probe assembly for the advancement of the borehole. Soil samples will be collected at approximately 1 foot, 5 feet, 10, 15, 20, and 25 feet bgs. The soil samples will be field screened with a photoionization detector(PID). Kleinfelder proposes to advance a total of three (3) soil probes to a maximum depth of approximately 25 feet below the ground surface (bsg). The 3 probes will be advanced within the former car wash facilities footprint and spaced equally apart from each other. Please see the attached map showing the proposed sample locations (Plate 2). While sampling, an experienced environmental engineer/geologist will classify the subsurface soils generated by the advancing push probe. During the advancement of the boring, soil samples will be collected at four foot intervals for lithologic classification and qualitative field screening. Lithologic classification will be based on the Unified Soil Classification System (USCS). Soil samples will be collected by cutting out the desired interval from a continuous core interval (successive 4 foot acetate liners) and sealing the ends with Teflon sheeting and tight fitting plastic caps. Each sample will be individually labeled and placed in an iced cooler pending 12255.CW I/ST02R980 Page 5 of 11 Copyright 2002,Kleinfelder,Inc. December 18,2002