Laserfiche WebLink
c <br /> r <br />• RESULTS <br /> During drilling, elevated PID readings were detected in soil <br /> borings HAI and HA2 , (see Table 1) , with the highest level being <br /> in HA1 at 15 feet below surface <br /> During drilling, the following general soil profile was <br /> encountered <br /> 1 Silt from 1 to 6 5 feet below ground surface (bgs) <br /> 2 . Dark brown silty clay, from the base of the silt <br /> to approximately 15 feet below the surface <br /> 3 Dark brown, silty, clayey sand from below the clay <br /> layer to the base of the borings <br /> Ground water was first observed in the borings from 6 . 2 to 8 feet <br /> bgs After time, the water rose to approximately 6 1 feet bgs, <br /> a rise of approximately 4 foot from the 10 feet bgs level found <br /> during the November 28 , 1994 sampling The first water <br /> encountered was found at the contact between the silt and the <br /> clay <br /> RESULTS SOIL SAMPLES <br /> The soil samples from HA1 and HA2 contained significant levels of <br /> gasoline range hydrocarbon contamination (see Table 1, Figure <br /> 4) The soil samples from HA3 , taken at the same levels as the <br /> samples from HAI and HA2 , did not contain detectable levels of <br /> TPHg or BTEX. <br /> RESULTS WATER SAMPLES <br /> During augering, a water sample was collected from each of the <br /> borings . All of these samples were analyzed for TPHg and BTEX. <br /> Of these samples, hydrocarbons were detected in HAI and HA2 (see <br /> Table 1 and Figure 5) The highest level was detected in HA2 <br /> which contained 890 ppb TPHg. This value was much lower than the <br /> 12 , 000, 000 ppb detected in SB1 during the November 28 , 1994 <br /> sampling. Since, no hydrocarbons were detected in the water <br /> sample from HA3 , we effectively closed the extent of the water <br /> born contamination <br /> 4 <br />