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AZURE ENVIRONMENTAL <br /> October 30, 1997 AZ145-001 <br /> QUARTERLY GROUND-WATER MONITORING REPORT <br /> July I through September 30, 1997 <br />' Manna Pro Facility <br /> Stockton, California <br />' 1.0 INTRODUCTION <br />' This Quarterly Ground-Water Monitoring Report is subnutted 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) Thus report presents the results of ground-water <br />' monitoring performed at the Site for the period of July 1 through September 30, 1997 This <br /> report also contains a technical status summary of the work completed at the Site during the <br /> quarterly period and work anticipated to be performed during October through December 1997 <br /> 2.0 DESCRIPTION OF GROUND-WATER MONITORING PROGRAM d <br />' The ground-water morutonng program at the Site consists of the following activities <br /> • Quarterly collection of ground-water level measurements from monitoring 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 />' e Quarterly submittal ofground-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 September 3, 1997 and are summarized in Table 2 Ground-water <br /> elevations from Site monitoring wells were used to construct potentiometric contours for shallow- <br /> zone sediments A water table elevation map for the shallow ground-water zone is illustrated in <br />' Figure 3 <br /> Ground-water level data indicate the depth to ground water measured in on-site wells on <br />' September 3, 1997 varied between 32 09- and 34 55-feet below grade During the period <br /> between October 1992 and September 1997, the depth to ground water vaned between 43 12 feet <br /> and 32 82 feet, respectively, at well MW-2 Based upon these data, it appears that water levels at <br />' the Site have risen approximately 10 3 feet during the period between October 1992 and <br /> September 1997 The ground-water level at MW-2 decreased approximately 1 8 feet during the <br /> quarterly period from May 1996 to September 1997 <br />' 1 <br />