ARCHIVED REPORTS XR0012580 - Laserfiche WebLink

Home Browse Search

r^ IT CORPORAVON 3.1 GROUND WATER GRADIENT As only two piezometric elevations were known, the ground water gradient underlying the site could not be determined Three wells (MW-1, MW-8, and MW-9) have reached the water ;,able at the site. However, the pro- duct in MW-8 has depressed t"ie mater table to beneath the bottom of the well, making it impossible ;:o determ;s,e the true piezometric surface in this well. 3.2 WELLS LOCATED NEAR SITE Figure 3.1 shows the location of irrigation and domestic wells in the vicinity of the station. The data presented are from Well Drillers r Reports submitted to the California Department of Water Resources ` (DWR). Table 3.2, which accompanies Figure 3.1, shows information regarding each well plotted. The well number presented is the nunber on `r the Water Well Drillers report. Theapproximate elevation of the well is presented next and, in most cases, is simply an interpreted elevation from the topographic map for the area. The approximate distance of the well from the station is indicated. The next column indicates whether the well is for domestic or irrigation purposes. The depth of the well and the depth of the surface seal are presented followed by the screen interval. The surface seal is the cement grout that is intended to pro- tect the well from contamination migrating down the well bore from the land surface. The screen interval is the actual length of well that is open to `lccept water from the ground. Finally, an indication of whether � at well is active ol• inactive is made along with the year the well was drilled. Active wells will tend to draw contamination toward them where an inactive well will be passive. The station has a low potential for contaminating any wells, as there is only orie well within a half mile radius of the site. The well screen data indicate that txo of the wells are very deep and thus are not li!:e— ly to b : in an aquifer that has any.-direct connection with the shallow aquifer that would be contaminated by a hydrocarbon spill. ii t�� is ,• r - i.il(t 6