Laserfiche WebLink
Chevron U.S.A. <br /> page 16 <br /> Utilizing groundwater depth measurements and results of the survey conducted at <br /> each well at the subject prop..,ty, an interpreted groundwater gradient was calculated <br /> for the subject property on March 19, 1990,April 1, 1990, May 8, 1990 and August 17, <br /> .� 1990. The groundwater gradient was calculated at the approximate average values shown <br /> in Table ll-B. <br /> TABLE IE-B <br /> i <br /> vera a Gradient <br /> Measurement Gradient <br /> Date ft f� <br /> - <br /> March 19, 1990 0.0017 <br /> April 1, 1990 0.0069 <br /> May 8, 1990 0.0125 <br /> August 17, 1990 0.0175 <br /> . % The groundwater flow direction beneath the subject site was interpreted as <br /> trending in a general north to north-easterly direction at the time of each of the <br /> ti <br /> four sounding events. <br /> �. Please refer to Plates 6A,66,6C and 6D at the end of this report which <br /> illustrate the groundwater flow beneath the site for each of the four sounding dates. <br /> s t Table 111 presents depth to groundwater and groundwater elevation data for the <br /> original wells that were constructed by others at the subject site. Weiss& <br /> Associates had sound these wells and obtained samplesfor quarterly monitoring during <br /> 1988 and 1989. Table III shows a continuous decline in the water surface elevation, <br /> as is reportedly currently the case. In addition, Pla{es 7A and 78 show results of <br /> .,. plots of a portion of this data,which indicates thr,direction of flow and approximate <br /> gradient. <br /> 164Q0-206-1)44 <br /> DANSES t M[)C?RE <br />