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DU PONT ENVIRONMENTAL REMEDIATION SERVICES <br /> 7068 Koll Center Parkway, Suite 401 <br /> Pleasanton, CA 94566 October 5, 1992 <br /> (510) 462-7772 Job No 0511-41-6090-02 <br /> Fax (510) 462-7944 <br /> Conoco Inc <br /> 600 North Daisy Ashford <br /> MO 3018 <br /> Houston, Texas 77079 <br />' ATTENTION Mr Gregory P Fletcher <br /> Senior Coordinator - Environmental Affairs <br />' SUBJECT Quarterly Report <br /> August 1992 <br /> Former Econo Gas Station <br />' 4325 East Washington Street <br /> Stockton, California <br />' Dear Mr Fletcher <br /> 1.0 INTRODUCTION <br /> This report presents the results of Du Pont Environmental Remediation Services' (DERS) quarterly <br /> groundwater sampling which was conducted at Conoco Ines (Conoco) former Econo Gas Station, <br /> f located at 4325 East Washington Street, Stockton, California (see the Location Map, Figure 1) on <br /> August 24, 1992 The purpose of this sampling program is to monitor and evaluate the extent of <br />' hydrocarbon contamination in the groundwater at the site <br />' 2.0 GROUNDWATER SAMPLING SUMMARY <br />' 2.1 Summary of Groundwater Elevation Data <br />' A summary of data regarding groundwater levels for August 1992 is presented in Table A in general, <br /> groundwater levels at the subject site have fallen approximately 2 3 feet since the last quarterly <br />' sampling event The groundwater gradient at the site is generally directed toward the south/southwest <br /> at a magnitude of approximately 0 0009 foot per foot (see the Groundwater Gradient Map, Figure 2) <br /> Better Things For Better Living <br />