ARCHIVED REPORTS_XR0006755 - Laserfiche WebLink

Home Browse Search

I QUARTERLY MONITORING REPORT APRIL 1997 6 CANEPA'S CAR WASH 6210 Pacific Avenue Stockton CA April 17 1997 4 3 Groundwater Gradient On April 1, 1997, the depth to groundwater was measured in each monitor well prior to the collection of groundwater samples The average depth to groundwater was approximately 39 9 feet below the ground surface (bgs) at the site Because monitor wells MW-1, MW-2, MW-3, MW-4, and MW-5 are screened from approximately 50 to 70 feet bgs, and monitor wells MW-6, MW-7, and MW- 8 are screened from approximately 45 to 65 feet bgs the water level was above the top of the screen in each of the wells The groundwater elevation ranged from 27 48 to 26 45 feet belo" sea level I (bmst) See Table 2, below for groundwater elevation data Groundwater elevation contours are shown in Figure 3, Appendix A A hydrograph of groundwater elevations is included as Figure 4, Appendix A The accompanying Hydrograph Table includes historical groundwater elevation data I TABLE 2 Groundwater Elevation Data (April 1, 1997) MW-1 through MW-8, SV-9 Well Well Casing Well Collar Depth to Groundwater ID Screen Elevation Water Elevation Interval (feet) (feet) (feet) (feet - bgs) MW-1 50 - 70 1345 3996 -2651 IMW-2 50 - 70 13 27 3972 -2645 MW-3 50 - 70 13 50 4026 -2676 MW-4 50 - 70 13 82 4037 -26 55 MW-5 50 - 70 1269 39 32 -26 63 MW-6 45 - 65 11 62 39 10 -2748 MW-7 45 - 65 13 18 4021 -2703 MW-S 45 - 65 1326 4009 -2683 SV-9 3999 I 5.0 DISCUSSION OF RESULTS Since the January, 1997, quarterly monitoring, the elevation of the water table has Increased approximately 2 2 feet During the past two (2) years, the depth to groundwater at the site has ranged from approximately 51 feet to 40 feet bgs The groundwater elevation contour map (Figure 3, IPage -4- Itot CONDOR