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1 <br /> ' for the flow direction change is unknown, though there is a nearby municipal water supply <br /> extraction well (Tracy Ball Park) <br /> 4.0 FIELD AND ANALYTICAL TESTING PROGRAM <br /> ' This section presents a description of the procedures to be used during the field investigation <br /> Selected subcontractors will assist with this work and a Treadwell & Rollo field representative <br /> will be present to coordinate access, direct work, make observations of the work area conditions, <br /> 1 collect samples, conduct health and safety monitoring of Treadwell & Rollo employees, oversee <br /> chain-of-custody procedures, and provide technical assistance as required The Site Health and <br /> ' Safety Plan, provided in Appendix A, will be implemented and air monitoring conducted <br /> Decontamination, chain-of-custody, data handling, and documentation procedures are presented <br /> ' in Section 5 0 <br /> lie 4.1 Mobilization Activities <br /> The mobilization activities will include conducting a site reconnaissance to mark drilling <br /> ' locations for the underground utility clearance performed by the Underground Services Alert <br /> (USA) system and a private utility company, if needed Activities will also include awarding of <br /> ' subcontracts, permitting, and scheduling of subcontractors The appropriate drilling permits will <br /> be obtained from the San Joaquin County Environmental Health Department and a county <br /> ' inspector contacted prior to grouting of the borings and well construction The City of Tracy <br /> will require encroachment permits for borings drilled along West Grant Line Road and may <br /> ' require a traffic control plan and flagger during drilling operations In addition, we will attempt <br /> to obtain drilling access agreements from the adjacent property owners <br /> ' 4.2 Phase 1 - Preliminary Sampling <br /> The work will be performed using a phased approach to collect the data needed to assess the <br /> ' lateral and vertical extent of contamination Phase 1 will include collecting and testing shallow <br /> isoil and groundwater grab samples The soil data will provide further information on possible <br /> 1 <br /> Field Investigation Work Plan 6 2 September 2003 <br /> TREADWELL &ROLLO,INC <br />