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CONTENTS <br /> INTRODUCTION <br /> 1.2 scope <br /> 1.2 Location and site Setting <br /> 2. FIELD INVESTIGATIONS 2 <br /> 2.1 <br /> Previous investigations <br /> 2.2 2 <br /> Installation of monitoring wells 4 <br /> 2.2.1 Groundwater monitoring wells 4 <br /> 2.2.2 Vapor extraction wells <br /> 2.3 Sampling and analysis of soils 5 <br /> 6 <br /> 2.4 Sampling and analysis of groundwater 7 <br /> 2.5 Depths to groundwater <br /> 7 <br /> 3. <br /> DISCUSSION OF RESULTS <br /> 3.1 Analytical results <br /> 3.2 Hydrogeological results <br /> 3.3 <br /> Conclusions <br /> 9 <br /> TABLE I CONCENTRATIO14S OF PETROLEUM HYDROCARBONS IN THE <br /> SOILS AT FORMER CHEVRON SS 9-1918, 45 EAST HARDING <br /> WAY, STOCKTON CALIFORNIA, 23, 24, AND 25 JANUARY <br /> 1989 <br /> TABLE 2 <br /> CONCENTRATIONS OF DISSOLVED CONSTITUE14TS IN THE <br /> GROUNDWATER AT FORMER CHEVRON S S 9-1918, <br /> 45 EAST <br /> HARDING WAY, STOCKTON, CALIFORNIA, 7 FEBRUARY 1989 <br /> TABLE 3 <br /> CUMULATIVE CONCENTRATIONS OF PETROLEUM HYDROCARBONS <br /> . <br /> IN THE SOILS AT FORMER CHEVRSS <br /> 9-1910, 45 E. <br /> HARDING WAY STOCKTON, I <br /> CALFORNON IA <br /> TI.BLE 4 CUMULATIVE CONCENTRATIONS <br /> OF PETROLEUM HyDROCARSONS <br /> IN THE GROUNDWATER AT F <br /> E ORMER CHEVRON SS 9-1918. <br /> ----------- -HM14NG-WAY,--STOCKT-ON;---CALIFORIIrX------- --- --- - — <br /> TABLE 5 CUMULATIVE SU <br /> WIARY OF DEPTHS To GROUNDWATER AND THE <br /> ELEVATIONS OF THE TOP OF GROUND WATER AT FORVXR <br /> CHEVRON SS 9-1918, <br /> STOCKTON, CALIFORNIA <br />