ARCHIVED REPORTS_GROUNDWATER AND SURFACE WATER MONITORING 3RD QUARTER 2015

Home Browse Search

GROUND ZERO ANALYSIS, INC. 1172 Kansas Avenue,Suite A Modesto,CA 95351 209.522.4119-PH 209.522.4227-FAX groundzeroanalysis.com ' Groundwater and Surface Water Monitoring 3`d Quarter 2015 City of Escalon Waste Water Treatment Plant 25100 River Road Escalon, CA Project No. 894.2 October 21, 2015 1.0 EXECUTIVE SUMMARY Groundwater and surface water monitoring and sampling was conducted at the City of ' Escalon wastewater treatment plant (WWTP) located at 25100 River Road, Escalon, California (Figure 1). The following report documents the work performed and the results of groundwater and surface water testing. Ground Zero Analysis, Inc. (Ground Zero) personnel conducted a groundwater-monitoring event on September 16, 2015 and September 17, 2015. The results presented in this report are based on field observations and laboratory analytical data. Figure 2 shows relevant structures and features of the WWTP and the locations of monitoring wells and sampling points. Results include: ' • The average elevation of groundwater at the Site was approximately 61.19 feet above mean sea level (msl). • The groundwater bearing and gradient are variable throughout the Site with a groundwater mound in the vicinity of groundwater monitoring well MW-5 and MW- 8. Elevation data from well MW-7 was not used in detem-iining the groundwater ' contours. Ground Zero believes the groundwater in MW-7 is perched. The average groundwater elevation decreased 0.29 feet since the September 11, 2014 sampling event. ' • Generally, the concentrations of the various groundwater constituents of concern showed minor fluctuations this quarter with no significant increases or decreases occurring and the concentrations found are within the range observed thus far. MW-7 Ground Zero Analysis,Inc. 1 8943`QMR 15