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AZURE ENVIRONMENTAL <br /> April 30, 1997 AZ145-001 <br /> QUARTERLY GROUND-WATER MONITORING REPORT <br /> January 1 through March 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 January 1 through March 31, 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 April through June, 1997 <br />' 2.0 DESCRIPTION OF GROUND-WATER MONITORING PROGRAM <br />' The ground-water monitoring 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 /> Iin accordance with the monitoring schedule in Table 1 <br /> • Quarterly submittal of ground-water momtonng 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 13, 1997 and are summarized in Table 2 Ground-water <br /> elevations from Site monitoring wells were used to construct potentiometrnc 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 />' 13, 1997 vaned between 28 71- and 30 59-feet below grade These data indicate an increase of <br /> ground-water levels at the Site from water levels measured during the previous quarter (average <br /> increase of 5 6 feet) During the period between October 1992 and February 1997, the depth to <br />' ground water vaned between 28 84 feet (February 1997) and 42 60 feet (October 1992) below <br /> grade at well MW,-1 Based upon these data, it appears that water levels,at the Site have risen <br /> approximately 13 8 feet during the period between October 1992 and February 1997 <br />' 1 <br />