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KLE/NFELDER \\ Bright People,Right Solutions. Work Plan State Route 4 Extension From Fresno Avenue to BNSF Railroad Tracks Stockton, California February 27, 2014 INTRODUCTION Caltrans in partnership with San Joaquin Council of Governments (SJCOG) has identified the need to extend the State Route 4 ramp, which begins/ends at Fresno Avenue, to Navy Drive. The project includes construction of embankments and over passes through residential areas, existing BNSF railways, and industrial areas. The subject of this work plan addresses proposed overpasses between Fresno Avenue and the BNSF railroad tracks. Kleinfelder understands that the overpass will consist of 12 bent caps to support the structure which will be supported by Cast In Drill Hole (CIDH) piers. The CIDH piers will involve drilling and potential disposing of excess soil which may contain contamination based on the surrounding commercial/industrial setting. Kleinfelder was requested to provide Phase II soil sampling, analyses and reporting to address potential contaminants in shallow soil at each bent cap location where CIDH piers will be installed. The following details Kleinfelder's proposed scope of work. PROPOSED SERVICES This following scope of work includes permitting, field work, laboratory analyses, and reporting based upon our understanding of current Site conditions and information provided to Kleinfelder from Caltrans. Task 1 — Work Plan, Permittinq and Pre-Field Activities San Joaquin County Environmental Health Department (EHD) requires completion of a boring/probe permit for the Site, and payment of fees prior to advancement of the probes. Kleinfelder has prepared and attached the boring/probe permit applications for submittal to EHD along with the required fees and this work plan detailing the proposed work. The permits must be approved prior to field activities and sampling. We have preliminarily scheduled drilling operations on April 6 and 7th, 2014 per the directives and project proponents and request issuance of a boring permit by EHD before that date, if feasible. If this cannot be done, please contact us as soon as possible such that we can re-schedule the field work and advise the client of the delay. The pushprobe subcontractor and/or Kleinfelder will contact Underground Service Alert (USA) 48 hours prior to conducting fieldwork to notify various utilities of our proposed 113961.8.PROP/ST014P0174 Page 1 of 4 February 27, 2014 Copyright 2014 Kleinfelder