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rM <br /> FA <br /> 1. H. KLEINFELDER&ASSOCIATES <br /> File: W-2006--1 <br /> December 16, 1485 <br /> Page 11 <br /> chemical analyses on the ground water samples collected <br /> from the monitoring wells and the production well. <br /> VI. DISCUSSION OF RESULTS <br /> A. Soil <br /> Data obtained from the PID readings and analytical <br /> results show the presence of hydrocarbons below the tank <br /> excavation area. Interpretation and extrapolation of <br /> data from the limited number of borings indicate that <br /> hydrocarbons have migrated primarily in a vertical <br /> direction. The PID readings did not detect hydrocarbons <br /> in any of the .samples above 16 feet. There may be an <br /> increased lateral component to the hydrocarbons migration <br /> in the soil just above the ground water table and is <br /> likely due to capillary intrapment of the gasoline along <br /> the ground water surface. The highest PID readings and <br /> analytical results were detected in the 16 and 26 foot <br /> samples from Boring B--1. Boring B--1 was placed <br /> approximately five feet to the east of excavated area. <br /> Because of the shed structure, soil borings could not be <br /> — ?' placed to check the migration of hydrocarbons in the soil <br /> to the south or southeast of the excavated area. No odor <br /> T was encountered in the cuttings of the bo:•ings in which <br /> the four monitoring wells were installed. <br />