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_ ` r <br />' AZURE ENVIRONMENTAL <br /> • January 30, 1998 AZ145-001 <br /> FOURTH QUARTER 1997 <br /> GROUND-WATER MONITORING REPORT <br /> October 1 through December 31, 1997 <br /> Manna Pro Facility <br />' Stockton, California <br /> 1.0 INTRODUCTION <br /> This Quarterly Ground-Water Monitoring Report is submitted on behalf of Manna Pro <br /> Corporation ("Manna Pro") for the facility at 4004 South El Dorado Street in Stockton, <br />' California ("the Site", Figures 1 and 2) This report presents the results of ground-water <br /> monitoring performed at the Site for the period of October 1 through December 31, 1997 -This <br /> report also contains a technical status summary of the work completed at the Site during the <br /> Iquarterly period and work anticipated to be performed during January through March 1997 <br /> 2.0 DESCRIPTION OF GROUND-WATER MONITORING PROGRAM <br />' The round-water monitoring program at the Site consists of the following activities <br /> g gP g g <br /> lie • Quarterly collection of ground-water level measurements from momtonng wells <br /> • Quarterly collection and laboratory analysis of ground-water samples from monitoring wells, <br /> in accordance with the monitoring schedule in Table 1 <br /> • Quarterly submittal of ground-water monitoring reports <br /> 3.0 GROUND-WATER MONITORING RESULTS <br /> 3.1 Ground-Water Elevations and Flow Direction <br /> Water-level measurements and calculated ground-water elevations were collected from <br /> monitoring wells at`the Site on November 13, 1997 and are summarized in Table 2 Ground- <br /> water elevations from Site monitoring wells were used to construct potentiometnc contours for <br /> Ishallow-zone sediments A water table elevation map for the shallow ground-water zone is <br /> illustrated in Figure 3 <br /> Ground-water level data indicate the depth to ground water measured in on-site wells on <br /> November 13, 1997 varied between 32 03- and 34 33-feet below grade During the period <br />' between October 1992 and November 1997, the depth to ground water varied between 43 12 feet <br /> and 32 71 feet, respectively, at well MW-2 Based upon these data, it appears that water levels at <br /> the Site have risen approximately 10 4 feet during the period between October 1992 and <br /> 1 <br />