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AZURE ENVIRONMENTAL <br /> July 30, 1998 AZ145-001 <br />' SECOND QUARTER 1998 <br /> GROUND-WATER MONITORING REPORT <br />' April 1 through June 30, 1998 <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 /> r 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 April 1 through June 30, 1998 This report <br /> also contains a technical status summary of the work completed at the Site during the quarterly <br /> period and work anticipated to be performed during the July through September, 1998 quarter <br /> I2.0 DESCRIPTION OF GROUND-WATER MONITORING PROGRAM <br /> The ground-water monitoring program at the Site consists of the following activities <br /> lie 0 <br /> Quarterly collection of ground-water level measurements from monitoring wells <br /> Quarterly and semi-annual collection and <br /> Q y laboratory analysis of ground-water samples from <br /> monitoring wells, in accordance with the monitoring schedule in Table 1 <br /> • Quarterly submittal of round- <br /> water monitoring reports <br /> I3.0 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 /> I monitoring wells at the Site on May 11, 1998 and are summarized in Table 2 Ground-water <br /> elevations from Site monitoring wells were used to construct potentiometnc contours for shallow- <br /> zone sediments A water table elevation map for the shallow ground-water zone is illustrated 1n- <br /> Figure <br /> nFigure 3 <br /> Ground-water level data indicate the depth to ground water measured in on-site wells on May 11, <br /> I 1998 vaned between 22 10- and 24 80-feet below grade During the period between October <br /> 1992 and May 1998, the depth to ground water vaned between 43 12 feet and 22 94 feet, <br /> respectively, at well MW-2 Based upon these data, it appears that water levels at the Site have <br /> Irisen approximately 20 2 feet dunng the period between October 1992 and May 1998 The <br /> . ground-water level at MW-2 rose approximately 4 5 feet during the quarterly period from <br /> February 1998 to May 1998 <br /> I <br /> 1 <br />