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HIM <br /> �5 <br /> Work Plan Evaluation of Soil and Ground Water December 4, 1989 <br /> Unocal Station No. 6981, Stockton, California AGS 38032-3W <br /> ra <br /> foot to evaluate the differences in water-level elevations among the monitoring wells. The <br /> elevation differences will be used to construct a groundwater surface map of the site. 'Ilse <br /> groundwater gradient and direction of groundwater flow will be evaluated from this map. <br /> f� DATA EVALUATION AND RECOMMENDATIONS FOR ADDITIONAL.WORK <br /> Applied GeoSystems will evaluate the results of the field work, laboratory data, ground- <br /> water gradient, and distribution of hydrocarbon contamination, and discuss the results of <br /> our evaluation with Unocal. We will provide Unocal with recommendations for additional <br /> l� F <br /> work, if necessary, to delineate hydrocarbon contamination in the soil and groundwater. <br /> REPORT PREPARATION <br /> After delineation of hydrocarbon contamination of the soil and groundwater, we will <br /> prepare a Problem Assessment Report summarizing the soil stratigraphy, field and <br /> laboratory procedures,well consti-oction details,laboratory results,contaminant distribution. <br /> and recommendations for further work necessary for the mitigation of soil and ground- <br /> water contamination will be supplied to Unocal. The report will comply with the rZS Tonal <br /> `' Board taff Recom enc'at'ons for Initial Ev tlualion and Investition of Underground <br /> L-%Ake _gdxACentral Valley Re ala d e orcin t eme is {R`Z� E -.._ -------- ----------------- <br /> i <br /> 23 <br /> �' App/led Geosystems <br />