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AZURE ENVIRONMENTAL October 30, 1998 AZ145-001 SECOND QUARTER 1998 GROUND-WATER MONITORING REPORT July 1 through September 30, 1998 Manna Pro Facility Stockton, California 1.0 INTRODUCTION ' This Quarterly Ground-Water Monitoring Report is submitted on behalf of Manna Pro Corporation ("Manna Pro")for the facility at 4004 South El Dorado Street in Stockton, I California ("the Site", Figures 1 and 2) This report presents the results of ground-water monitoring performed at the Site for the period of July 1 through September 30, 1998 This report also contains a technical status summary of the work completed at the Site during the ' quarterly period and work anticipated to be performed during October through December 1998 2.0 DESCRIPTION OF GROUND-WATER MONITORING PROGRAM ' The ground-water morutonng program at the Site consists of the following activities • Quarterly collection of ground-water level measurements from monitoring wells ' • Quarterly collection and laboratory analysis of ground-water samples from monitoring wells, in accordance with the monitoring schedule in Table 1 ' • Quarterly submittal of ground-water monitoring reports 3.0 GROUND-WATER MONITORING RESULTS 3.1 Ground-Water Elevations and Flow Direction ' Water-level measurements and calculated ground-water elevations were collected from monitoring wells at the Site on September 9, 1998 and are summarized in Table 2 Ground-water elevations from Site monitoring wells were used to construct potentiometnc contours for shallow- zone sediments A water table elevation map for the shallow ground-water zone is illustrated in Figure 3 ' Ground-water level data indicate the depth to ground water measured in on-site wells on September 9, 1998 vaned between 25 56- and 27 97-feet below grade During the period between October 1992 and September 1998, the depth to ground water vaned between 43 12 feet ' and 26 25 feet, respectively, at well MW-2 Based upon these data, it appears that water levels at the Site have risen approximately 16 9 feet during the period between October 1992 and 1