Laserfiche WebLink
e x <br /> ' a <br /> 1' Harding Lamon Assmialas <br /> encountered. This litholo is considerabl different from the soil <br /> gy Y <br /> condi- <br /> tuns encountered at Wells MW-1 through MW-4 where silty clays were gener- <br /> ally found. <br /> F <br /> Using the water level measurements presented in Table 1, we have calcu- <br /> lated that the direction of ground-water flow is to the north-northeastat a <br /> gradient of about 0.003 feet per foot. During the interval between aur j!,a <br /> . measurements the <br /> ground-water table rose by approximately 0.9 feet. This <br /> may be the result of increased rainfall during this 3-1/2 month period. The <br /> ground-water gradient is north-northeast for both measurements. <br /> < DISCUSSION AND REaDvHENDATIONS <br /> The soil samples at P-1, P-2, and MW-5 were taken at a depth of <br /> approxi- <br /> mately 5 feet, ,just above the depth at which water was encountered in the <br /> borings. Stablized ground water levels of the site are approximately 3 feet <br /> E ' III belowround surface. <br /> g The difference between these levels may be the result <br /> -, of a confined aquifer condition that exists in the upper clay layer. <br /> Wr earlier report documented a total petroleum hydrocarbon (TFN) con <br /> f centration in the <br /> so". of 1100 Ppm at Well MIW-l. The the <br /> �.. mi c m <br /> al results from <br /> the present investigation indicate the TPH concentrations of 1300 and 770 <br /> 4 Ppm at P-1 ,and P-2, respectively, in the soils at a 5-foot depth. Soils ' <br /> having a TPH concentratiun greater than 1000 <br /> f P!Pm are generally subject. to <br /> ' some remedial action by the:S-LFD. <br /> g <br /> d� <br />