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V 1. PURPOSE AND SCOPE: The purpose of this work plan is to outline the methodology 4 to be followed for the soil and groundwater site assessment for petroleum hydrocarbons at the former Parmar Texaco site located at 521 North Cherokee Lane, Ludt, California (Figures 1 and 2) The proposed scope of work for this project includes the following mayor tasks • Develop a work plan and worker health and safety plan for the initial soil and groundwater site assessment, • Conduct a Sensitive Receptor Survey within a 2,500 foot radius of the site, • Initiate and continue quarterly monitoring of the three existing groundwater monitoring wells USEPA Test Method 8260B analyses will be used since MTBE and 1,2-DCA have been identified as being present in site groundwaters, • Complete an initial Site Conceptual Model of the site to include all existing geological, hydrological,and chemical data This initial model will be used to guide future subsurface soil and groundwater exploration of the site, • Conduct a geophysical survey of the site to identify any subsurface facilities such as pipes, electrical lines,sewer lines,etc in order to prevent unanticipated dig in or drill ins during future sot]bonngs In addition, this survey will identify and confirm if all UST's and piping have been removed from the subsurface • Drill and sample 10 soil borings to 60 feet to verify past soil assessment findings and to attempt to . define the lateral and horizontal extent of petroleum hydrocarbon soil contamination at the site • Complete 7 of the soil borings to monitoring wells PT-MW-4 to 10 Wells will be completed as 2"diameter monitoring wells The wellhead casing elevations and horizontal coordinates will be surveyed to local vertical datum, • Analytical laboratory analysis of soil samples collected from soil borings It is anticipate that approximately 5 to 7 soil samples from each boring will be analyzed using USEPA Test Method 8260B A select number of samples(2 to 4)will be analyzed for soluble lead • Conduct a 72-hour Groundwater pump test of all of the monitoring wells to determine hydrogeological conditions in first groundwater This pump test will also function as an interim remedial action to remove approximately 5,000 to 10,000 gallons of free-floating gasoline product present on the groundwater surface, • Prepare and subnut a Preliminary Problem Assessment Report(PAR)that will document all historical site assessment activities and data and incorporate the new data from soil borings and groundwater monitoring and testing The PAR will present all new drilling activities,monitoring well construction, soil and water sample analytical results,data analysis,conclusions,and recommendations for any further assessment action that may be necessary • Prepare and submit Quarterly Status Reports(QSR)that will report to PHSEHD and CRWQCB of site activities each quarter in accordance with state of California reporting requirements for hazardous waste sites • Place the site into the SWRCB Geotracker program Main\D\EnwronmentaMarmarTexaco\Workpia"42003 wpd 2