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AZURE ENVIRONMENTAL <br /> Apn130, 1998 AZ145-001 <br /> FIRST QUARTER 1998 <br /> GROUND-WATER MONITORING REPORT <br />' January 1 through March 31, 1998 <br /> Manna Pro Facility <br />' Stockton, California <br /> 1.0 INTRODUCTION <br />' This First Quarter 1998 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 />' Califorma("the Site",Figures 1 and 2) This report presents the results of ground-water <br /> morutonng performed at the Site for the period of January 1 through March 31, 1998 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 April through June, 1998 <br /> 2.0 DESCRIPTION OF GROUND-WATER MONITORING PROGRAM <br />' The ground-water monitonng program at the Site consists of the following activities <br /> • Quarterly collection of ground-water level measurements from morutonng 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 February 5, 1998 and are summarized in Table 2 Ground-water <br />' elevations'from Site monitoring wells were used to construct potentrometnc contours for shallow- <br /> zone sediments A water table elevation contour 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 February <br /> 5, 1998 vaned between 28 11- and 30 65-feet below grade During the period between October <br /> 1992 and February 1998, the depth to ground water vaned between 43 12 feet and 27 40 feet, <br /> respectively, at well MW-2 Based upon these data, it appears that water levels at the Site have <br /> risen approximately 15 7 feet during the period between October 1992 and February 1998 The <br />' ground-water level at MW-2 rose approximately 4 feet during the quarterly period from <br /> November 1997 to February 1998 <br />' 1 <br />